diff options
Diffstat (limited to 'drivers/iio')
70 files changed, 10873 insertions, 936 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 345395e9dc6e..4011effe4c05 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -21,13 +21,12 @@ config IIO_BUFFER if IIO_BUFFER config IIO_BUFFER_CB -boolean "IIO callback buffer used for push in-kernel interfaces" + bool "IIO callback buffer used for push in-kernel interfaces" help Should be selected by any drivers that do in-kernel push usage. That is, those where the data is pushed to the consumer. config IIO_KFIFO_BUF - select IIO_TRIGGER tristate "Industrial I/O buffering based on kfifo" help A simple fifo based on kfifo. Note that this currently provides @@ -44,7 +43,7 @@ config IIO_TRIGGERED_BUFFER endif # IIO_BUFFER config IIO_TRIGGER - boolean "Enable triggered sampling support" + bool "Enable triggered sampling support" help Provides IIO core support for triggers. Currently these are used to initialize capture of samples to push into diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 9b9be8725e9d..7c9a9a94a8ce 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -43,6 +43,9 @@ config HID_SENSOR_ACCEL_3D Say yes here to build support for the HID SENSOR accelerometers 3D. + To compile this driver as a module, choose M here: the + module will be called hid-sensor-accel-3d. + config IIO_ST_ACCEL_3AXIS tristate "STMicroelectronics accelerometers 3-Axis Driver" depends on (I2C || SPI_MASTER) && SYSFS @@ -80,6 +83,9 @@ config KXSD9 Say yes here to build support for the Kionix KXSD9 accelerometer. Currently this only supports the device via an SPI interface. + To compile this driver as a module, choose M here: the module + will be called kxsd9. + config MMA8452 tristate "Freescale MMA8452Q Accelerometer Driver" depends on I2C @@ -105,4 +111,29 @@ config KXCJK1013 To compile this driver as a module, choose M here: the module will be called kxcjk-1013. +config MMA9551_CORE + tristate + +config MMA9551 + tristate "Freescale MMA9551L Intelligent Motion-Sensing Platform Driver" + depends on I2C + select MMA9551_CORE + + help + Say yes here to build support for the Freescale MMA9551L + Intelligent Motion-Sensing Platform Driver. + + To compile this driver as a module, choose M here: the module + will be called mma9551. + +config MMA9553 + tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver" + depends on I2C + select MMA9551_CORE + help + Say yes here to build support for the Freescale MMA9553L + Intelligent Pedometer Platform Driver. + + To compile this driver as a module, choose M here: the module + will be called mma9553. endmenu diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index a593996c6539..99d89e46cad1 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -10,6 +10,12 @@ obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o obj-$(CONFIG_KXSD9) += kxsd9.o obj-$(CONFIG_MMA8452) += mma8452.o +obj-$(CONFIG_MMA9551_CORE) += mma9551_core.o +obj-$(CONFIG_MMA9551) += mma9551.o +obj-$(CONFIG_MMA9553) += mma9553.o + +obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o + obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o st_accel-y := st_accel_core.o st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c index 0085c2faeaaa..2b4fad6998c1 100644 --- a/drivers/iio/accel/hid-sensor-accel-3d.c +++ b/drivers/iio/accel/hid-sensor-accel-3d.c @@ -111,19 +111,12 @@ static int accel_3d_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; switch (mask) { case 0: - poll_value = hid_sensor_read_poll_value( - &accel_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&accel_state->common_attributes, true); - msleep_interruptible(poll_value * 2); report_id = accel_state->accel[chan->scan_index].report_id; address = accel_3d_addresses[chan->scan_index]; if (report_id >= 0) @@ -420,6 +413,7 @@ static struct platform_driver hid_accel_3d_platform_driver = { .id_table = hid_accel_3d_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_accel_3d_probe, .remove = hid_accel_3d_remove, diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c index da2fe93739a2..567de269cc00 100644 --- a/drivers/iio/accel/kxcjk-1013.c +++ b/drivers/iio/accel/kxcjk-1013.c @@ -108,6 +108,7 @@ struct kxcjk1013_data { bool motion_trigger_on; int64_t timestamp; enum kx_chipset chipset; + bool is_smo8500_device; }; enum kxcjk1013_axis { @@ -377,6 +378,7 @@ static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data) static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on) { +#ifdef CONFIG_PM int ret; if (on) @@ -388,8 +390,11 @@ static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on) if (ret < 0) { dev_err(&data->client->dev, "Failed: kxcjk1013_set_power_state for %d\n", on); + if (on) + pm_runtime_put_noidle(&data->client->dev); return ret; } +#endif return 0; } @@ -858,6 +863,8 @@ static int kxcjk1013_write_event_config(struct iio_dev *indio_dev, ret = kxcjk1013_setup_any_motion_interrupt(data, state); if (ret < 0) { + kxcjk1013_set_power_state(data, false); + data->ev_enable_state = 0; mutex_unlock(&data->mutex); return ret; } @@ -1008,6 +1015,7 @@ static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig, else ret = kxcjk1013_setup_new_data_interrupt(data, state); if (ret < 0) { + kxcjk1013_set_power_state(data, false); mutex_unlock(&data->mutex); return ret; } @@ -1131,12 +1139,16 @@ static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private) } static const char *kxcjk1013_match_acpi_device(struct device *dev, - enum kx_chipset *chipset) + enum kx_chipset *chipset, + bool *is_smo8500_device) { const struct acpi_device_id *id; + id = acpi_match_device(dev->driver->acpi_match_table, dev); if (!id) return NULL; + if (strcmp(id->id, "SMO8500") == 0) + *is_smo8500_device = true; *chipset = (enum kx_chipset)id->driver_data; return dev_name(dev); @@ -1151,6 +1163,8 @@ static int kxcjk1013_gpio_probe(struct i2c_client *client, if (!client) return -EINVAL; + if (data->is_smo8500_device) + return -ENOTSUPP; dev = &client->dev; @@ -1200,7 +1214,8 @@ static int kxcjk1013_probe(struct i2c_client *client, name = id->name; } else if (ACPI_HANDLE(&client->dev)) { name = kxcjk1013_match_acpi_device(&client->dev, - &data->chipset); + &data->chipset, + &data->is_smo8500_device); } else return -ENODEV; @@ -1228,21 +1243,25 @@ static int kxcjk1013_probe(struct i2c_client *client, KXCJK1013_IRQ_NAME, indio_dev); if (ret) - return ret; + goto err_poweroff; data->dready_trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", indio_dev->name, indio_dev->id); - if (!data->dready_trig) - return -ENOMEM; + if (!data->dready_trig) { + ret = -ENOMEM; + goto err_poweroff; + } data->motion_trig = devm_iio_trigger_alloc(&client->dev, "%s-any-motion-dev%d", indio_dev->name, indio_dev->id); - if (!data->motion_trig) - return -ENOMEM; + if (!data->motion_trig) { + ret = -ENOMEM; + goto err_poweroff; + } data->dready_trig->dev.parent = &client->dev; data->dready_trig->ops = &kxcjk1013_trigger_ops; @@ -1251,7 +1270,7 @@ static int kxcjk1013_probe(struct i2c_client *client, iio_trigger_get(indio_dev->trig); ret = iio_trigger_register(data->dready_trig); if (ret) - return ret; + goto err_poweroff; data->motion_trig->dev.parent = &client->dev; data->motion_trig->ops = &kxcjk1013_trigger_ops; @@ -1300,6 +1319,8 @@ err_trigger_unregister: iio_trigger_unregister(data->dready_trig); if (data->motion_trig) iio_trigger_unregister(data->motion_trig); +err_poweroff: + kxcjk1013_set_mode(data, STANDBY); return ret; } @@ -1349,10 +1370,7 @@ static int kxcjk1013_resume(struct device *dev) int ret = 0; mutex_lock(&data->mutex); - /* Check, if the suspend occured while active */ - if (data->dready_trigger_on || data->motion_trigger_on || - data->ev_enable_state) - ret = kxcjk1013_set_mode(data, OPERATION); + ret = kxcjk1013_set_mode(data, OPERATION); mutex_unlock(&data->mutex); return ret; @@ -1364,8 +1382,14 @@ static int kxcjk1013_runtime_suspend(struct device *dev) { struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); struct kxcjk1013_data *data = iio_priv(indio_dev); + int ret; - return kxcjk1013_set_mode(data, STANDBY); + ret = kxcjk1013_set_mode(data, STANDBY); + if (ret < 0) { + dev_err(&data->client->dev, "powering off device failed\n"); + return -EAGAIN; + } + return 0; } static int kxcjk1013_runtime_resume(struct device *dev) @@ -1399,6 +1423,7 @@ static const struct acpi_device_id kx_acpi_match[] = { {"KXCJ1013", KXCJK1013}, {"KXCJ1008", KXCJ91008}, {"KXTJ1009", KXTJ21009}, + {"SMO8500", KXCJ91008}, { }, }; MODULE_DEVICE_TABLE(acpi, kx_acpi_match); @@ -1407,6 +1432,7 @@ static const struct i2c_device_id kxcjk1013_id[] = { {"kxcjk1013", KXCJK1013}, {"kxcj91008", KXCJ91008}, {"kxtj21009", KXTJ21009}, + {"SMO8500", KXCJ91008}, {} }; diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 3c12d4966376..5b80657883bb 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -111,7 +111,7 @@ static const int mma8452_samp_freq[8][2] = { {6, 250000}, {1, 560000} }; -/* +/* * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048 * The userspace interface uses m/s^2 and we declare micro units * So scale factor is given by: diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c new file mode 100644 index 000000000000..46c38351c6a3 --- /dev/null +++ b/drivers/iio/accel/mma9551.c @@ -0,0 +1,637 @@ +/* + * Freescale MMA9551L Intelligent Motion-Sensing Platform driver + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/pm_runtime.h> +#include "mma9551_core.h" + +#define MMA9551_DRV_NAME "mma9551" +#define MMA9551_IRQ_NAME "mma9551_event" +#define MMA9551_GPIO_NAME "mma9551_int" +#define MMA9551_GPIO_COUNT 4 + +/* Tilt application (inclination in IIO terms). */ +#define MMA9551_TILT_XZ_ANG_REG 0x00 +#define MMA9551_TILT_YZ_ANG_REG 0x01 +#define MMA9551_TILT_XY_ANG_REG 0x02 +#define MMA9551_TILT_ANGFLG BIT(7) +#define MMA9551_TILT_QUAD_REG 0x03 +#define MMA9551_TILT_XY_QUAD_SHIFT 0 +#define MMA9551_TILT_YZ_QUAD_SHIFT 2 +#define MMA9551_TILT_XZ_QUAD_SHIFT 4 +#define MMA9551_TILT_CFG_REG 0x01 +#define MMA9551_TILT_ANG_THRESH_MASK GENMASK(3, 0) + +#define MMA9551_DEFAULT_SAMPLE_RATE 122 /* Hz */ + +/* Tilt events are mapped to the first three GPIO pins. */ +enum mma9551_tilt_axis { + mma9551_x = 0, + mma9551_y, + mma9551_z, +}; + +struct mma9551_data { + struct i2c_client *client; + struct mutex mutex; + int event_enabled[3]; + int irqs[MMA9551_GPIO_COUNT]; +}; + +static int mma9551_read_incli_chan(struct i2c_client *client, + const struct iio_chan_spec *chan, + int *val) +{ + u8 quad_shift, angle, quadrant; + u16 reg_addr; + int ret; + + switch (chan->channel2) { + case IIO_MOD_X: + reg_addr = MMA9551_TILT_YZ_ANG_REG; + quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT; + break; + case IIO_MOD_Y: + reg_addr = MMA9551_TILT_XZ_ANG_REG; + quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT; + break; + case IIO_MOD_Z: + reg_addr = MMA9551_TILT_XY_ANG_REG; + quad_shift = MMA9551_TILT_XY_QUAD_SHIFT; + break; + default: + return -EINVAL; + } + + ret = mma9551_set_power_state(client, true); + if (ret < 0) + return ret; + + ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, + reg_addr, &angle); + if (ret < 0) + goto out_poweroff; + + ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, + MMA9551_TILT_QUAD_REG, &quadrant); + if (ret < 0) + goto out_poweroff; + + angle &= ~MMA9551_TILT_ANGFLG; + quadrant = (quadrant >> quad_shift) & 0x03; + + if (quadrant == 1 || quadrant == 3) + *val = 90 * (quadrant + 1) - angle; + else + *val = angle + 90 * quadrant; + + ret = IIO_VAL_INT; + +out_poweroff: + mma9551_set_power_state(client, false); + return ret; +} + +static int mma9551_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_INCLI: + mutex_lock(&data->mutex); + ret = mma9551_read_incli_chan(data->client, chan, val); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_ACCEL: + mutex_lock(&data->mutex); + ret = mma9551_read_accel_chan(data->client, + chan, val, val2); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ACCEL: + return mma9551_read_accel_scale(val, val2); + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int mma9551_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct mma9551_data *data = iio_priv(indio_dev); + + switch (chan->type) { + case IIO_INCLI: + /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ + return data->event_enabled[chan->channel2 - 1]; + default: + return -EINVAL; + } +} + +static int mma9551_config_incli_event(struct iio_dev *indio_dev, + enum iio_modifier axis, + int state) +{ + struct mma9551_data *data = iio_priv(indio_dev); + enum mma9551_tilt_axis mma_axis; + int ret; + + /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ + mma_axis = axis - 1; + + if (data->event_enabled[mma_axis] == state) + return 0; + + if (state == 0) { + ret = mma9551_gpio_config(data->client, + (enum mma9551_gpio_pin)mma_axis, + MMA9551_APPID_NONE, 0, 0); + if (ret < 0) + return ret; + + ret = mma9551_set_power_state(data->client, false); + if (ret < 0) + return ret; + } else { + int bitnum; + + /* Bit 7 of each angle register holds the angle flag. */ + switch (axis) { + case IIO_MOD_X: + bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG; + break; + case IIO_MOD_Y: + bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG; + break; + case IIO_MOD_Z: + bitnum = 7 + 8 * MMA9551_TILT_XY_ANG_REG; + break; + default: + return -EINVAL; + } + + + ret = mma9551_set_power_state(data->client, true); + if (ret < 0) + return ret; + + ret = mma9551_gpio_config(data->client, + (enum mma9551_gpio_pin)mma_axis, + MMA9551_APPID_TILT, bitnum, 0); + if (ret < 0) { + mma9551_set_power_state(data->client, false); + return ret; + } + } + + data->event_enabled[mma_axis] = state; + + return ret; +} + +static int mma9551_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + switch (chan->type) { + case IIO_INCLI: + mutex_lock(&data->mutex); + ret = mma9551_config_incli_event(indio_dev, + chan->channel2, state); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } +} + +static int mma9551_write_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + switch (chan->type) { + case IIO_INCLI: + if (val2 != 0 || val < 1 || val > 10) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9551_update_config_bits(data->client, + MMA9551_APPID_TILT, + MMA9551_TILT_CFG_REG, + MMA9551_TILT_ANG_THRESH_MASK, + val); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } +} + +static int mma9551_read_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + u8 tmp; + + switch (chan->type) { + case IIO_INCLI: + mutex_lock(&data->mutex); + ret = mma9551_read_config_byte(data->client, + MMA9551_APPID_TILT, + MMA9551_TILT_CFG_REG, &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + *val = tmp & MMA9551_TILT_ANG_THRESH_MASK; + *val2 = 0; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static const struct iio_event_spec mma9551_incli_event = { + .type = IIO_EV_TYPE_ROC, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE), +}; + +#define MMA9551_INCLI_CHANNEL(axis) { \ + .type = IIO_INCLI, \ + .modified = 1, \ + .channel2 = axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ + .event_spec = &mma9551_incli_event, \ + .num_event_specs = 1, \ +} + +static const struct iio_chan_spec mma9551_channels[] = { + MMA9551_ACCEL_CHANNEL(IIO_MOD_X), + MMA9551_ACCEL_CHANNEL(IIO_MOD_Y), + MMA9551_ACCEL_CHANNEL(IIO_MOD_Z), + + MMA9551_INCLI_CHANNEL(IIO_MOD_X), + MMA9551_INCLI_CHANNEL(IIO_MOD_Y), + MMA9551_INCLI_CHANNEL(IIO_MOD_Z), +}; + +static const struct iio_info mma9551_info = { + .driver_module = THIS_MODULE, + .read_raw = mma9551_read_raw, + .read_event_config = mma9551_read_event_config, + .write_event_config = mma9551_write_event_config, + .read_event_value = mma9551_read_event_value, + .write_event_value = mma9551_write_event_value, +}; + +static irqreturn_t mma9551_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct mma9551_data *data = iio_priv(indio_dev); + int i, ret, mma_axis = -1; + u16 reg; + u8 val; + + mutex_lock(&data->mutex); + + for (i = 0; i < 3; i++) + if (irq == data->irqs[i]) { + mma_axis = i; + break; + } + + if (mma_axis == -1) { + /* IRQ was triggered on 4th line, which we don't use. */ + dev_warn(&data->client->dev, + "irq triggered on unused line %d\n", data->irqs[3]); + goto out; + } + + switch (mma_axis) { + case mma9551_x: + reg = MMA9551_TILT_YZ_ANG_REG; + break; + case mma9551_y: + reg = MMA9551_TILT_XZ_ANG_REG; + break; + case mma9551_z: + reg = MMA9551_TILT_XY_ANG_REG; + break; + } + + /* + * Read the angle even though we don't use it, otherwise we + * won't get any further interrupts. + */ + ret = mma9551_read_status_byte(data->client, MMA9551_APPID_TILT, + reg, &val); + if (ret < 0) { + dev_err(&data->client->dev, + "error %d reading tilt register in IRQ\n", ret); + goto out; + } + + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_INCLI, 0, (mma_axis + 1), + IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING), + iio_get_time_ns()); + +out: + mutex_unlock(&data->mutex); + + return IRQ_HANDLED; +} + +static int mma9551_init(struct mma9551_data *data) +{ + int ret; + + ret = mma9551_read_version(data->client); + if (ret) + return ret; + + return mma9551_set_device_state(data->client, true); +} + +static int mma9551_gpio_probe(struct iio_dev *indio_dev) +{ + struct gpio_desc *gpio; + int i, ret; + struct mma9551_data *data = iio_priv(indio_dev); + struct device *dev = &data->client->dev; + + for (i = 0; i < MMA9551_GPIO_COUNT; i++) { + gpio = devm_gpiod_get_index(dev, MMA9551_GPIO_NAME, i); + if (IS_ERR(gpio)) { + dev_err(dev, "acpi gpio get index failed\n"); + return PTR_ERR(gpio); + } + + ret = gpiod_direction_input(gpio); + if (ret) + return ret; + + data->irqs[i] = gpiod_to_irq(gpio); + ret = devm_request_threaded_irq(dev, data->irqs[i], + NULL, mma9551_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + MMA9551_IRQ_NAME, indio_dev); + if (ret < 0) { + dev_err(dev, "request irq %d failed\n", data->irqs[i]); + return ret; + } + + dev_dbg(dev, "gpio resource, no:%d irq:%d\n", + desc_to_gpio(gpio), data->irqs[i]); + } + + return 0; +} + +static const char *mma9551_match_acpi_device(struct device *dev) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return NULL; + + return dev_name(dev); +} + +static int mma9551_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mma9551_data *data; + struct iio_dev *indio_dev; + const char *name = NULL; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + if (id) + name = id->name; + else if (ACPI_HANDLE(&client->dev)) + name = mma9551_match_acpi_device(&client->dev); + + ret = mma9551_init(data); + if (ret < 0) + return ret; + + mutex_init(&data->mutex); + + indio_dev->dev.parent = &client->dev; + indio_dev->channels = mma9551_channels; + indio_dev->num_channels = ARRAY_SIZE(mma9551_channels); + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &mma9551_info; + + ret = mma9551_gpio_probe(indio_dev); + if (ret < 0) + goto out_poweroff; + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(&client->dev, "unable to register iio device\n"); + goto out_poweroff; + } + + ret = pm_runtime_set_active(&client->dev); + if (ret < 0) + goto out_iio_unregister; + + pm_runtime_enable(&client->dev); + pm_runtime_set_autosuspend_delay(&client->dev, + MMA9551_AUTO_SUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&client->dev); + + return 0; + +out_iio_unregister: + iio_device_unregister(indio_dev); +out_poweroff: + mma9551_set_device_state(client, false); + + return ret; +} + +static int mma9551_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct mma9551_data *data = iio_priv(indio_dev); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + iio_device_unregister(indio_dev); + mutex_lock(&data->mutex); + mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + + return 0; +} + +#ifdef CONFIG_PM +static int mma9551_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + if (ret < 0) { + dev_err(&data->client->dev, "powering off device failed\n"); + return -EAGAIN; + } + + return 0; +} + +static int mma9551_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + ret = mma9551_set_device_state(data->client, true); + if (ret < 0) + return ret; + + mma9551_sleep(MMA9551_DEFAULT_SAMPLE_RATE); + + return 0; +} +#endif + +#ifdef CONFIG_PM_SLEEP +static int mma9551_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + + return ret; +} + +static int mma9551_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9551_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, true); + mutex_unlock(&data->mutex); + + return ret; +} +#endif + +static const struct dev_pm_ops mma9551_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mma9551_suspend, mma9551_resume) + SET_RUNTIME_PM_OPS(mma9551_runtime_suspend, + mma9551_runtime_resume, NULL) +}; + +static const struct acpi_device_id mma9551_acpi_match[] = { + {"MMA9551", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(acpi, mma9551_acpi_match); + +static const struct i2c_device_id mma9551_id[] = { + {"mma9551", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, mma9551_id); + +static struct i2c_driver mma9551_driver = { + .driver = { + .name = MMA9551_DRV_NAME, + .acpi_match_table = ACPI_PTR(mma9551_acpi_match), + .pm = &mma9551_pm_ops, + }, + .probe = mma9551_probe, + .remove = mma9551_remove, + .id_table = mma9551_id, +}; + +module_i2c_driver(mma9551_driver); + +MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>"); +MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MMA9551L motion-sensing platform driver"); diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c new file mode 100644 index 000000000000..7f55a6d7cd03 --- /dev/null +++ b/drivers/iio/accel/mma9551_core.c @@ -0,0 +1,798 @@ +/* + * Common code for Freescale MMA955x Intelligent Sensor Platform drivers + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/pm_runtime.h> +#include "mma9551_core.h" + +/* Command masks for mailbox write command */ +#define MMA9551_CMD_READ_VERSION_INFO 0x00 +#define MMA9551_CMD_READ_CONFIG 0x10 +#define MMA9551_CMD_WRITE_CONFIG 0x20 +#define MMA9551_CMD_READ_STATUS 0x30 + +/* Mailbox read command */ +#define MMA9551_RESPONSE_COCO BIT(7) + +/* Error-Status codes returned in mailbox read command */ +#define MMA9551_MCI_ERROR_NONE 0x00 +#define MMA9551_MCI_ERROR_PARAM 0x04 +#define MMA9551_MCI_INVALID_COUNT 0x19 +#define MMA9551_MCI_ERROR_COMMAND 0x1C +#define MMA9551_MCI_ERROR_INVALID_LENGTH 0x21 +#define MMA9551_MCI_ERROR_FIFO_BUSY 0x22 +#define MMA9551_MCI_ERROR_FIFO_ALLOCATED 0x23 +#define MMA9551_MCI_ERROR_FIFO_OVERSIZE 0x24 + +/* GPIO Application */ +#define MMA9551_GPIO_POL_MSB 0x08 +#define MMA9551_GPIO_POL_LSB 0x09 + +/* Sleep/Wake application */ +#define MMA9551_SLEEP_CFG 0x06 +#define MMA9551_SLEEP_CFG_SNCEN BIT(0) +#define MMA9551_SLEEP_CFG_FLEEN BIT(1) +#define MMA9551_SLEEP_CFG_SCHEN BIT(2) + +/* AFE application */ +#define MMA9551_AFE_X_ACCEL_REG 0x00 +#define MMA9551_AFE_Y_ACCEL_REG 0x02 +#define MMA9551_AFE_Z_ACCEL_REG 0x04 + +/* Reset/Suspend/Clear application */ +#define MMA9551_RSC_RESET 0x00 +#define MMA9551_RSC_OFFSET(mask) (3 - (ffs(mask) - 1) / 8) +#define MMA9551_RSC_VAL(mask) (mask >> (((ffs(mask) - 1) / 8) * 8)) + +/* + * A response is composed of: + * - control registers: MB0-3 + * - data registers: MB4-31 + * + * A request is composed of: + * - mbox to write to (always 0) + * - control registers: MB1-4 + * - data registers: MB5-31 + */ +#define MMA9551_MAILBOX_CTRL_REGS 4 +#define MMA9551_MAX_MAILBOX_DATA_REGS 28 +#define MMA9551_MAILBOX_REGS 32 + +#define MMA9551_I2C_READ_RETRIES 5 +#define MMA9551_I2C_READ_DELAY 50 /* us */ + +struct mma9551_mbox_request { + u8 start_mbox; /* Always 0. */ + u8 app_id; + /* + * See Section 5.3.1 of the MMA955xL Software Reference Manual. + * + * Bit 7: reserved, always 0 + * Bits 6-4: command + * Bits 3-0: upper bits of register offset + */ + u8 cmd_off; + u8 lower_off; + u8 nbytes; + u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS - 1]; +} __packed; + +struct mma9551_mbox_response { + u8 app_id; + /* + * See Section 5.3.3 of the MMA955xL Software Reference Manual. + * + * Bit 7: COCO + * Bits 6-0: Error code. + */ + u8 coco_err; + u8 nbytes; + u8 req_bytes; + u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS]; +} __packed; + +struct mma9551_version_info { + __be32 device_id; + u8 rom_version[2]; + u8 fw_version[2]; + u8 hw_version[2]; + u8 fw_build[2]; +}; + +static int mma9551_transfer(struct i2c_client *client, + u8 app_id, u8 command, u16 offset, + u8 *inbytes, int num_inbytes, + u8 *outbytes, int num_outbytes) +{ + struct mma9551_mbox_request req; + struct mma9551_mbox_response rsp; + struct i2c_msg in, out; + u8 req_len, err_code; + int ret, retries; + + if (offset >= 1 << 12) { + dev_err(&client->dev, "register offset too large\n"); + return -EINVAL; + } + + req_len = 1 + MMA9551_MAILBOX_CTRL_REGS + num_inbytes; + req.start_mbox = 0; + req.app_id = app_id; + req.cmd_off = command | (offset >> 8); + req.lower_off = offset; + + if (command == MMA9551_CMD_WRITE_CONFIG) + req.nbytes = num_inbytes; + else + req.nbytes = num_outbytes; + if (num_inbytes) + memcpy(req.buf, inbytes, num_inbytes); + + out.addr = client->addr; + out.flags = 0; + out.len = req_len; + out.buf = (u8 *)&req; + + ret = i2c_transfer(client->adapter, &out, 1); + if (ret < 0) { + dev_err(&client->dev, "i2c write failed\n"); + return ret; + } + + retries = MMA9551_I2C_READ_RETRIES; + do { + udelay(MMA9551_I2C_READ_DELAY); + + in.addr = client->addr; + in.flags = I2C_M_RD; + in.len = sizeof(rsp); + in.buf = (u8 *)&rsp; + + ret = i2c_transfer(client->adapter, &in, 1); + if (ret < 0) { + dev_err(&client->dev, "i2c read failed\n"); + return ret; + } + + if (rsp.coco_err & MMA9551_RESPONSE_COCO) + break; + } while (--retries > 0); + + if (retries == 0) { + dev_err(&client->dev, + "timed out while waiting for command response\n"); + return -ETIMEDOUT; + } + + if (rsp.app_id != app_id) { + dev_err(&client->dev, + "app_id mismatch in response got %02x expected %02x\n", + rsp.app_id, app_id); + return -EINVAL; + } + + err_code = rsp.coco_err & ~MMA9551_RESPONSE_COCO; + if (err_code != MMA9551_MCI_ERROR_NONE) { + dev_err(&client->dev, "read returned error %x\n", err_code); + return -EINVAL; + } + + if (rsp.nbytes != rsp.req_bytes) { + dev_err(&client->dev, + "output length mismatch got %d expected %d\n", + rsp.nbytes, rsp.req_bytes); + return -EINVAL; + } + + if (num_outbytes) + memcpy(outbytes, rsp.buf, num_outbytes); + + return 0; +} + +/** + * mma9551_read_config_byte() - read 1 configuration byte + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Pointer to store value read + * + * Read one configuration byte from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed + * by one or more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_config_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 *val) +{ + return mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG, + reg, NULL, 0, val, 1); +} +EXPORT_SYMBOL(mma9551_read_config_byte); + +/** + * mma9551_write_config_byte() - write 1 configuration byte + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Value to write + * + * Write one configuration byte from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed by one or + * more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_write_config_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 val) +{ + return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg, + &val, 1, NULL, 0); +} +EXPORT_SYMBOL(mma9551_write_config_byte); + +/** + * mma9551_read_status_byte() - read 1 status byte + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Pointer to store value read + * + * Read one status byte from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed by one or + * more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_status_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 *val) +{ + return mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS, + reg, NULL, 0, val, 1); +} +EXPORT_SYMBOL(mma9551_read_status_byte); + +/** + * mma9551_read_config_word() - read 1 config word + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Pointer to store value read + * + * Read one configuration word from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed by one or + * more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_config_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 *val) +{ + int ret; + __be16 v; + + ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG, + reg, NULL, 0, (u8 *)&v, 2); + *val = be16_to_cpu(v); + + return ret; +} +EXPORT_SYMBOL(mma9551_read_config_word); + +/** + * mma9551_write_config_word() - write 1 config word + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Value to write + * + * Write one configuration word from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed by one or + * more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_write_config_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 val) +{ + __be16 v = cpu_to_be16(val); + + return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg, + (u8 *) &v, 2, NULL, 0); +} +EXPORT_SYMBOL(mma9551_write_config_word); + +/** + * mma9551_read_status_word() - read 1 status word + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @val: Pointer to store value read + * + * Read one status word from the device using MMA955xL command format. + * Commands to the MMA955xL platform consist of a write followed by one or + * more reads. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_status_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 *val) +{ + int ret; + __be16 v; + + ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS, + reg, NULL, 0, (u8 *)&v, 2); + *val = be16_to_cpu(v); + + return ret; +} +EXPORT_SYMBOL(mma9551_read_status_word); + +/** + * mma9551_read_config_words() - read multiple config words + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @len: Length of array to read in bytes + * @val: Array of words to read + * + * Read multiple configuration registers (word-sized registers). + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_config_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf) +{ + int ret, i; + int len_words = len / sizeof(u16); + __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS]; + + ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG, + reg, NULL, 0, (u8 *) be_buf, len); + if (ret < 0) + return ret; + + for (i = 0; i < len_words; i++) + buf[i] = be16_to_cpu(be_buf[i]); + + return 0; +} +EXPORT_SYMBOL(mma9551_read_config_words); + +/** + * mma9551_read_status_words() - read multiple status words + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @len: Length of array to read in bytes + * @val: Array of words to read + * + * Read multiple status registers (word-sized registers). + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_status_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf) +{ + int ret, i; + int len_words = len / sizeof(u16); + __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS]; + + ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS, + reg, NULL, 0, (u8 *) be_buf, len); + if (ret < 0) + return ret; + + for (i = 0; i < len_words; i++) + buf[i] = be16_to_cpu(be_buf[i]); + + return 0; +} +EXPORT_SYMBOL(mma9551_read_status_words); + +/** + * mma9551_write_config_words() - write multiple config words + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @len: Length of array to write in bytes + * @val: Array of words to write + * + * Write multiple configuration registers (word-sized registers). + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_write_config_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf) +{ + int i; + int len_words = len / sizeof(u16); + __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS]; + + for (i = 0; i < len_words; i++) + be_buf[i] = cpu_to_be16(buf[i]); + + return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, + reg, (u8 *) be_buf, len, NULL, 0); +} +EXPORT_SYMBOL(mma9551_write_config_words); + +/** + * mma9551_update_config_bits() - update bits in register + * @client: I2C client + * @app_id: Application ID + * @reg: Application register + * @mask: Mask for the bits to update + * @val: Value of the bits to update + * + * Update bits in the given register using a bit mask. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_update_config_bits(struct i2c_client *client, u8 app_id, + u16 reg, u8 mask, u8 val) +{ + int ret; + u8 tmp, orig; + + ret = mma9551_read_config_byte(client, app_id, reg, &orig); + if (ret < 0) + return ret; + + tmp = orig & ~mask; + tmp |= val & mask; + + if (tmp == orig) + return 0; + + return mma9551_write_config_byte(client, app_id, reg, tmp); +} +EXPORT_SYMBOL(mma9551_update_config_bits); + +/** + * mma9551_gpio_config() - configure gpio + * @client: I2C client + * @pin: GPIO pin to configure + * @app_id: Application ID + * @bitnum: Bit number of status register being assigned to the GPIO pin. + * @polarity: The polarity parameter is described in section 6.2.2, page 66, + * of the Software Reference Manual. Basically, polarity=0 means + * the interrupt line has the same value as the selected bit, + * while polarity=1 means the line is inverted. + * + * Assign a bit from an application’s status register to a specific GPIO pin. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin, + u8 app_id, u8 bitnum, int polarity) +{ + u8 reg, pol_mask, pol_val; + int ret; + + if (pin > mma9551_gpio_max) { + dev_err(&client->dev, "bad GPIO pin\n"); + return -EINVAL; + } + + /* + * Pin 6 is configured by regs 0x00 and 0x01, pin 7 by 0x02 and + * 0x03, and so on. + */ + reg = pin * 2; + + ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO, + reg, app_id); + if (ret < 0) { + dev_err(&client->dev, "error setting GPIO app_id\n"); + return ret; + } + + ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO, + reg + 1, bitnum); + if (ret < 0) { + dev_err(&client->dev, "error setting GPIO bit number\n"); + return ret; + } + + switch (pin) { + case mma9551_gpio6: + reg = MMA9551_GPIO_POL_LSB; + pol_mask = 1 << 6; + break; + case mma9551_gpio7: + reg = MMA9551_GPIO_POL_LSB; + pol_mask = 1 << 7; + break; + case mma9551_gpio8: + reg = MMA9551_GPIO_POL_MSB; + pol_mask = 1 << 0; + break; + case mma9551_gpio9: + reg = MMA9551_GPIO_POL_MSB; + pol_mask = 1 << 1; + break; + } + pol_val = polarity ? pol_mask : 0; + + ret = mma9551_update_config_bits(client, MMA9551_APPID_GPIO, reg, + pol_mask, pol_val); + if (ret < 0) + dev_err(&client->dev, "error setting GPIO polarity\n"); + + return ret; +} +EXPORT_SYMBOL(mma9551_gpio_config); + +/** + * mma9551_read_version() - read device version information + * @client: I2C client + * + * Read version information and print device id and firmware version. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_read_version(struct i2c_client *client) +{ + struct mma9551_version_info info; + int ret; + + ret = mma9551_transfer(client, MMA9551_APPID_VERSION, 0x00, 0x00, + NULL, 0, (u8 *)&info, sizeof(info)); + if (ret < 0) + return ret; + + dev_info(&client->dev, "device ID 0x%x, firmware version %02x.%02x\n", + be32_to_cpu(info.device_id), info.fw_version[0], + info.fw_version[1]); + + return 0; +} +EXPORT_SYMBOL(mma9551_read_version); + +/** + * mma9551_set_device_state() - sets HW power mode + * @client: I2C client + * @enable: Use true to power on device, false to cause the device + * to enter sleep. + * + * Set power on/off for device using the Sleep/Wake Application. + * When enable is true, power on chip and enable doze mode. + * When enable is false, enter sleep mode (device remains in the + * lowest-power mode). + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_set_device_state(struct i2c_client *client, bool enable) +{ + return mma9551_update_config_bits(client, MMA9551_APPID_SLEEP_WAKE, + MMA9551_SLEEP_CFG, + MMA9551_SLEEP_CFG_SNCEN | + MMA9551_SLEEP_CFG_FLEEN | + MMA9551_SLEEP_CFG_SCHEN, + enable ? MMA9551_SLEEP_CFG_SCHEN | + MMA9551_SLEEP_CFG_FLEEN : + MMA9551_SLEEP_CFG_SNCEN); +} +EXPORT_SYMBOL(mma9551_set_device_state); + +/** + * mma9551_set_power_state() - sets runtime PM state + * @client: I2C client + * @on: Use true to power on device, false to power off + * + * Resume or suspend the device using Runtime PM. + * The device will suspend after the autosuspend delay. + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_set_power_state(struct i2c_client *client, bool on) +{ +#ifdef CONFIG_PM + int ret; + + if (on) + ret = pm_runtime_get_sync(&client->dev); + else { + pm_runtime_mark_last_busy(&client->dev); + ret = pm_runtime_put_autosuspend(&client->dev); + } + + if (ret < 0) { + dev_err(&client->dev, + "failed to change power state to %d\n", on); + if (on) + pm_runtime_put_noidle(&client->dev); + + return ret; + } +#endif + + return 0; +} +EXPORT_SYMBOL(mma9551_set_power_state); + +/** + * mma9551_sleep() - sleep + * @freq: Application frequency + * + * Firmware applications run at a certain frequency on the + * device. Sleep for one application cycle to make sure the + * application had time to run once and initialize set values. + */ +void mma9551_sleep(int freq) +{ + int sleep_val = 1000 / freq; + + if (sleep_val < 20) + usleep_range(sleep_val * 1000, 20000); + else + msleep_interruptible(sleep_val); +} +EXPORT_SYMBOL(mma9551_sleep); + +/** + * mma9551_read_accel_chan() - read accelerometer channel + * @client: I2C client + * @chan: IIO channel + * @val: Pointer to the accelerometer value read + * @val2: Unused + * + * Read accelerometer value for the specified channel. + * + * Locking note: This function must be called with the device lock held. + * Locking is not handled inside the function. Callers should ensure they + * serialize access to the HW. + * + * Returns: IIO_VAL_INT on success, negative value on failure. + */ +int mma9551_read_accel_chan(struct i2c_client *client, + const struct iio_chan_spec *chan, + int *val, int *val2) +{ + u16 reg_addr; + s16 raw_accel; + int ret; + + switch (chan->channel2) { + case IIO_MOD_X: + reg_addr = MMA9551_AFE_X_ACCEL_REG; + break; + case IIO_MOD_Y: + reg_addr = MMA9551_AFE_Y_ACCEL_REG; + break; + case IIO_MOD_Z: + reg_addr = MMA9551_AFE_Z_ACCEL_REG; + break; + default: + return -EINVAL; + } + + ret = mma9551_set_power_state(client, true); + if (ret < 0) + return ret; + + ret = mma9551_read_status_word(client, MMA9551_APPID_AFE, + reg_addr, &raw_accel); + if (ret < 0) + goto out_poweroff; + + *val = raw_accel; + + ret = IIO_VAL_INT; + +out_poweroff: + mma9551_set_power_state(client, false); + return ret; +} +EXPORT_SYMBOL(mma9551_read_accel_chan); + +/** + * mma9551_read_accel_scale() - read accelerometer scale + * @val: Pointer to the accelerometer scale (int value) + * @val2: Pointer to the accelerometer scale (micro value) + * + * Read accelerometer scale. + * + * Returns: IIO_VAL_INT_PLUS_MICRO. + */ +int mma9551_read_accel_scale(int *val, int *val2) +{ + *val = 0; + *val2 = 2440; + + return IIO_VAL_INT_PLUS_MICRO; +} +EXPORT_SYMBOL(mma9551_read_accel_scale); + +/** + * mma9551_app_reset() - reset application + * @client: I2C client + * @app_mask: Application to reset + * + * Reset the given application (using the Reset/Suspend/Clear + * Control Application) + * + * Returns: 0 on success, negative value on failure. + */ +int mma9551_app_reset(struct i2c_client *client, u32 app_mask) +{ + return mma9551_write_config_byte(client, MMA9551_APPID_RCS, + MMA9551_RSC_RESET + + MMA9551_RSC_OFFSET(app_mask), + MMA9551_RSC_VAL(app_mask)); +} +EXPORT_SYMBOL(mma9551_app_reset); + +MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>"); +MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MMA955xL sensors core"); diff --git a/drivers/iio/accel/mma9551_core.h b/drivers/iio/accel/mma9551_core.h new file mode 100644 index 000000000000..edaa56b1078e --- /dev/null +++ b/drivers/iio/accel/mma9551_core.h @@ -0,0 +1,81 @@ +/* + * Common code for Freescale MMA955x Intelligent Sensor Platform drivers + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef _MMA9551_CORE_H_ +#define _MMA9551_CORE_H_ + +/* Applications IDs */ +#define MMA9551_APPID_VERSION 0x00 +#define MMA9551_APPID_GPIO 0x03 +#define MMA9551_APPID_AFE 0x06 +#define MMA9551_APPID_TILT 0x0B +#define MMA9551_APPID_SLEEP_WAKE 0x12 +#define MMA9551_APPID_PEDOMETER 0x15 +#define MMA9551_APPID_RCS 0x17 +#define MMA9551_APPID_NONE 0xff + +/* Reset/Suspend/Clear application app masks */ +#define MMA9551_RSC_PED BIT(21) + +#define MMA9551_AUTO_SUSPEND_DELAY_MS 2000 + +enum mma9551_gpio_pin { + mma9551_gpio6 = 0, + mma9551_gpio7, + mma9551_gpio8, + mma9551_gpio9, + mma9551_gpio_max = mma9551_gpio9, +}; + +#define MMA9551_ACCEL_CHANNEL(axis) { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +} + +int mma9551_read_config_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 *val); +int mma9551_write_config_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 val); +int mma9551_read_status_byte(struct i2c_client *client, u8 app_id, + u16 reg, u8 *val); +int mma9551_read_config_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 *val); +int mma9551_write_config_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 val); +int mma9551_read_status_word(struct i2c_client *client, u8 app_id, + u16 reg, u16 *val); +int mma9551_read_config_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf); +int mma9551_read_status_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf); +int mma9551_write_config_words(struct i2c_client *client, u8 app_id, + u16 reg, u8 len, u16 *buf); +int mma9551_update_config_bits(struct i2c_client *client, u8 app_id, + u16 reg, u8 mask, u8 val); +int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin, + u8 app_id, u8 bitnum, int polarity); +int mma9551_read_version(struct i2c_client *client); +int mma9551_set_device_state(struct i2c_client *client, bool enable); +int mma9551_set_power_state(struct i2c_client *client, bool on); +void mma9551_sleep(int freq); +int mma9551_read_accel_chan(struct i2c_client *client, + const struct iio_chan_spec *chan, + int *val, int *val2); +int mma9551_read_accel_scale(int *val, int *val2); +int mma9551_app_reset(struct i2c_client *client, u32 app_mask); + +#endif /* _MMA9551_CORE_H_ */ diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c new file mode 100644 index 000000000000..d23ebf192f63 --- /dev/null +++ b/drivers/iio/accel/mma9553.c @@ -0,0 +1,1334 @@ +/* + * Freescale MMA9553L Intelligent Pedometer driver + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/pm_runtime.h> +#include "mma9551_core.h" + +#define MMA9553_DRV_NAME "mma9553" +#define MMA9553_IRQ_NAME "mma9553_event" +#define MMA9553_GPIO_NAME "mma9553_int" + +/* Pedometer configuration registers (R/W) */ +#define MMA9553_REG_CONF_SLEEPMIN 0x00 +#define MMA9553_REG_CONF_SLEEPMAX 0x02 +#define MMA9553_REG_CONF_SLEEPTHD 0x04 +#define MMA9553_MASK_CONF_WORD GENMASK(15, 0) + +#define MMA9553_REG_CONF_CONF_STEPLEN 0x06 +#define MMA9553_MASK_CONF_CONFIG BIT(15) +#define MMA9553_MASK_CONF_ACT_DBCNTM BIT(14) +#define MMA9553_MASK_CONF_SLP_DBCNTM BIT(13) +#define MMA9553_MASK_CONF_STEPLEN GENMASK(7, 0) + +#define MMA9553_REG_CONF_HEIGHT_WEIGHT 0x08 +#define MMA9553_MASK_CONF_HEIGHT GENMASK(15, 8) +#define MMA9553_MASK_CONF_WEIGHT GENMASK(7, 0) + +#define MMA9553_REG_CONF_FILTER 0x0A +#define MMA9553_MASK_CONF_FILTSTEP GENMASK(15, 8) +#define MMA9553_MASK_CONF_MALE BIT(7) +#define MMA9553_MASK_CONF_FILTTIME GENMASK(6, 0) + +#define MMA9553_REG_CONF_SPEED_STEP 0x0C +#define MMA9553_MASK_CONF_SPDPRD GENMASK(15, 8) +#define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0) + +#define MMA9553_REG_CONF_ACTTHD 0x0E + +/* Pedometer status registers (R-only) */ +#define MMA9553_REG_STATUS 0x00 +#define MMA9553_MASK_STATUS_MRGFL BIT(15) +#define MMA9553_MASK_STATUS_SUSPCHG BIT(14) +#define MMA9553_MASK_STATUS_STEPCHG BIT(13) +#define MMA9553_MASK_STATUS_ACTCHG BIT(12) +#define MMA9553_MASK_STATUS_SUSP BIT(11) +#define MMA9553_MASK_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8)) +#define MMA9553_MASK_STATUS_VERSION 0x00FF + +#define MMA9553_REG_STEPCNT 0x02 +#define MMA9553_REG_DISTANCE 0x04 +#define MMA9553_REG_SPEED 0x06 +#define MMA9553_REG_CALORIES 0x08 +#define MMA9553_REG_SLEEPCNT 0x0A + +/* Pedometer events are always mapped to this pin. */ +#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6 +#define MMA9553_DEFAULT_GPIO_POLARITY 0 + +/* Bitnum used for gpio configuration = bit number in high status byte */ +#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9) + +#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */ + +/* + * The internal activity level must be stable for ACTTHD samples before + * ACTIVITY is updated.The ACTIVITY variable contains the current activity + * level and is updated every time a step is detected or once a second + * if there are no steps. + */ +#define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE) +#define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE) + +/* + * Autonomously suspend pedometer if acceleration vector magnitude + * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds. + */ +#define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */ +#define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */ +#define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30) + +#define MMA9553_CONFIG_RETRIES 2 + +/* Status register - activity field */ +enum activity_level { + ACTIVITY_UNKNOWN, + ACTIVITY_REST, + ACTIVITY_WALKING, + ACTIVITY_JOGGING, + ACTIVITY_RUNNING, +}; + +static struct mma9553_event_info { + enum iio_chan_type type; + enum iio_modifier mod; + enum iio_event_direction dir; +} mma9553_events_info[] = { + { + .type = IIO_STEPS, + .mod = IIO_NO_MOD, + .dir = IIO_EV_DIR_NONE, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_STILL, + .dir = IIO_EV_DIR_RISING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_STILL, + .dir = IIO_EV_DIR_FALLING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_WALKING, + .dir = IIO_EV_DIR_RISING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_WALKING, + .dir = IIO_EV_DIR_FALLING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_JOGGING, + .dir = IIO_EV_DIR_RISING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_JOGGING, + .dir = IIO_EV_DIR_FALLING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_RUNNING, + .dir = IIO_EV_DIR_RISING, + }, + { + .type = IIO_ACTIVITY, + .mod = IIO_MOD_RUNNING, + .dir = IIO_EV_DIR_FALLING, + }, +}; + +#define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info) + +struct mma9553_event { + struct mma9553_event_info *info; + bool enabled; +}; + +struct mma9553_conf_regs { + u16 sleepmin; + u16 sleepmax; + u16 sleepthd; + u16 config; + u16 height_weight; + u16 filter; + u16 speed_step; + u16 actthd; +} __packed; + +struct mma9553_data { + struct i2c_client *client; + struct mutex mutex; + struct mma9553_conf_regs conf; + struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE]; + int num_events; + u8 gpio_bitnum; + /* + * This is used for all features that depend on step count: + * step count, distance, speed, calories. + */ + bool stepcnt_enabled; + u16 stepcnt; + u8 activity; + s64 timestamp; +}; + +static u8 mma9553_get_bits(u16 val, u16 mask) +{ + return (val & mask) >> (ffs(mask) - 1); +} + +static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask) +{ + return (current_val & ~mask) | (val << (ffs(mask) - 1)); +} + +static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity) +{ + switch (activity) { + case ACTIVITY_RUNNING: + return IIO_MOD_RUNNING; + case ACTIVITY_JOGGING: + return IIO_MOD_JOGGING; + case ACTIVITY_WALKING: + return IIO_MOD_WALKING; + case ACTIVITY_REST: + return IIO_MOD_STILL; + case ACTIVITY_UNKNOWN: + default: + return IIO_NO_MOD; + } +} + +static void mma9553_init_events(struct mma9553_data *data) +{ + int i; + + data->num_events = MMA9553_EVENTS_INFO_SIZE; + for (i = 0; i < data->num_events; i++) { + data->events[i].info = &mma9553_events_info[i]; + data->events[i].enabled = false; + } +} + +static struct mma9553_event *mma9553_get_event(struct mma9553_data *data, + enum iio_chan_type type, + enum iio_modifier mod, + enum iio_event_direction dir) +{ + int i; + + for (i = 0; i < data->num_events; i++) + if (data->events[i].info->type == type && + data->events[i].info->mod == mod && + data->events[i].info->dir == dir) + return &data->events[i]; + + return NULL; +} + +static bool mma9553_is_any_event_enabled(struct mma9553_data *data, + bool check_type, + enum iio_chan_type type) +{ + int i; + + for (i = 0; i < data->num_events; i++) + if ((check_type && data->events[i].info->type == type && + data->events[i].enabled) || + (!check_type && data->events[i].enabled)) + return true; + + return false; +} + +static int mma9553_set_config(struct mma9553_data *data, u16 reg, + u16 *p_reg_val, u16 val, u16 mask) +{ + int ret, retries; + u16 reg_val, config; + + reg_val = *p_reg_val; + if (val == mma9553_get_bits(reg_val, mask)) + return 0; + + reg_val = mma9553_set_bits(reg_val, val, mask); + ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER, + reg, reg_val); + if (ret < 0) { + dev_err(&data->client->dev, + "error writing config register 0x%x\n", reg); + return ret; + } + + *p_reg_val = reg_val; + + /* Reinitializes the pedometer with current configuration values */ + config = mma9553_set_bits(data->conf.config, 1, + MMA9553_MASK_CONF_CONFIG); + + ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER, + MMA9553_REG_CONF_CONF_STEPLEN, config); + if (ret < 0) { + dev_err(&data->client->dev, + "error writing config register 0x%x\n", + MMA9553_REG_CONF_CONF_STEPLEN); + return ret; + } + + retries = MMA9553_CONFIG_RETRIES; + do { + mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE); + ret = mma9551_read_config_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_CONF_CONF_STEPLEN, + &config); + if (ret < 0) + return ret; + } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) && + --retries > 0); + + return 0; +} + +static int mma9553_read_activity_stepcnt(struct mma9553_data *data, + u8 *activity, u16 *stepcnt) +{ + u32 status_stepcnt; + u16 status; + int ret; + + ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER, + MMA9553_REG_STATUS, sizeof(u32), + (u16 *) &status_stepcnt); + if (ret < 0) { + dev_err(&data->client->dev, + "error reading status and stepcnt\n"); + return ret; + } + + status = status_stepcnt & MMA9553_MASK_CONF_WORD; + *activity = mma9553_get_bits(status, MMA9553_MASK_STATUS_ACTIVITY); + *stepcnt = status_stepcnt >> 16; + + return 0; +} + +static int mma9553_conf_gpio(struct mma9553_data *data) +{ + u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER; + int ret; + struct mma9553_event *ev_step_detect; + bool activity_enabled; + + activity_enabled = + mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY); + ev_step_detect = + mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE); + + /* + * If both step detector and activity are enabled, use the MRGFL bit. + * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags. + */ + if (activity_enabled && ev_step_detect->enabled) + bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL); + else if (ev_step_detect->enabled) + bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG); + else if (activity_enabled) + bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG); + else /* Reset */ + appid = MMA9551_APPID_NONE; + + if (data->gpio_bitnum == bitnum) + return 0; + + /* Save initial values for activity and stepcnt */ + if (activity_enabled || ev_step_detect->enabled) + mma9553_read_activity_stepcnt(data, &data->activity, + &data->stepcnt); + + ret = mma9551_gpio_config(data->client, + MMA9553_DEFAULT_GPIO_PIN, + appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY); + if (ret < 0) + return ret; + data->gpio_bitnum = bitnum; + + return 0; +} + +static int mma9553_init(struct mma9553_data *data) +{ + int ret; + + ret = mma9551_read_version(data->client); + if (ret) + return ret; + + /* + * Read all the pedometer configuration registers. This is used as + * a device identification command to differentiate the MMA9553L + * from the MMA9550L. + */ + ret = + mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER, + MMA9553_REG_CONF_SLEEPMIN, + sizeof(data->conf), (u16 *) &data->conf); + if (ret < 0) { + dev_err(&data->client->dev, + "device is not MMA9553L: failed to read cfg regs\n"); + return ret; + } + + + /* Reset gpio */ + data->gpio_bitnum = -1; + ret = mma9553_conf_gpio(data); + if (ret < 0) + return ret; + + ret = mma9551_app_reset(data->client, MMA9551_RSC_PED); + if (ret < 0) + return ret; + + /* Init config registers */ + data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN; + data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX; + data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD; + data->conf.config = + mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG); + /* + * Clear the activity debounce counter when the activity level changes, + * so that the confidence level applies for any activity level. + */ + data->conf.config = mma9553_set_bits(data->conf.config, 1, + MMA9553_MASK_CONF_ACT_DBCNTM); + ret = + mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER, + MMA9553_REG_CONF_SLEEPMIN, + sizeof(data->conf), (u16 *) &data->conf); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to write configuration registers\n"); + return ret; + } + + return mma9551_set_device_state(data->client, true); +} + +static int mma9553_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + u16 tmp; + u8 activity; + bool powered_on; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_STEPS: + /* + * The HW only counts steps and other dependent + * parameters (speed, distance, calories, activity) + * if power is on (from enabling an event or the + * step counter */ + powered_on = + mma9553_is_any_event_enabled(data, false, 0) || + data->stepcnt_enabled; + if (!powered_on) { + dev_err(&data->client->dev, + "No channels enabled\n"); + return -EINVAL; + } + mutex_lock(&data->mutex); + ret = mma9551_read_status_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_STEPCNT, + &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + *val = tmp; + return IIO_VAL_INT; + case IIO_DISTANCE: + powered_on = + mma9553_is_any_event_enabled(data, false, 0) || + data->stepcnt_enabled; + if (!powered_on) { + dev_err(&data->client->dev, + "No channels enabled\n"); + return -EINVAL; + } + mutex_lock(&data->mutex); + ret = mma9551_read_status_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_DISTANCE, + &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + *val = tmp; + return IIO_VAL_INT; + case IIO_ACTIVITY: + powered_on = + mma9553_is_any_event_enabled(data, false, 0) || + data->stepcnt_enabled; + if (!powered_on) { + dev_err(&data->client->dev, + "No channels enabled\n"); + return -EINVAL; + } + mutex_lock(&data->mutex); + ret = mma9551_read_status_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_STATUS, + &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + + activity = + mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY); + + /* + * The device does not support confidence value levels, + * so we will always have 100% for current activity and + * 0% for the others. + */ + if (chan->channel2 == mma9553_activity_to_mod(activity)) + *val = 100; + else + *val = 0; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_VELOCITY: /* m/h */ + if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) + return -EINVAL; + powered_on = + mma9553_is_any_event_enabled(data, false, 0) || + data->stepcnt_enabled; + if (!powered_on) { + dev_err(&data->client->dev, + "No channels enabled\n"); + return -EINVAL; + } + mutex_lock(&data->mutex); + ret = mma9551_read_status_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_SPEED, &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + *val = tmp; + return IIO_VAL_INT; + case IIO_ENERGY: /* Cal or kcal */ + powered_on = + mma9553_is_any_event_enabled(data, false, 0) || + data->stepcnt_enabled; + if (!powered_on) { + dev_err(&data->client->dev, + "No channels enabled\n"); + return -EINVAL; + } + mutex_lock(&data->mutex); + ret = mma9551_read_status_word(data->client, + MMA9551_APPID_PEDOMETER, + MMA9553_REG_CALORIES, + &tmp); + mutex_unlock(&data->mutex); + if (ret < 0) + return ret; + *val = tmp; + return IIO_VAL_INT; + case IIO_ACCEL: + mutex_lock(&data->mutex); + ret = mma9551_read_accel_chan(data->client, + chan, val, val2); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VELOCITY: /* m/h to m/s */ + if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) + return -EINVAL; + *val = 0; + *val2 = 277; /* 0.000277 */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ENERGY: /* Cal or kcal to J */ + *val = 4184; + return IIO_VAL_INT; + case IIO_ACCEL: + return mma9551_read_accel_scale(val, val2); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_ENABLE: + *val = data->stepcnt_enabled; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBHEIGHT: + tmp = mma9553_get_bits(data->conf.height_weight, + MMA9553_MASK_CONF_HEIGHT); + *val = tmp / 100; /* cm to m */ + *val2 = (tmp % 100) * 10000; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_CALIBWEIGHT: + *val = mma9553_get_bits(data->conf.height_weight, + MMA9553_MASK_CONF_WEIGHT); + return IIO_VAL_INT; + case IIO_CHAN_INFO_DEBOUNCE_COUNT: + switch (chan->type) { + case IIO_STEPS: + *val = mma9553_get_bits(data->conf.filter, + MMA9553_MASK_CONF_FILTSTEP); + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_DEBOUNCE_TIME: + switch (chan->type) { + case IIO_STEPS: + *val = mma9553_get_bits(data->conf.filter, + MMA9553_MASK_CONF_FILTTIME); + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_INT_TIME: + switch (chan->type) { + case IIO_VELOCITY: + if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) + return -EINVAL; + *val = mma9553_get_bits(data->conf.speed_step, + MMA9553_MASK_CONF_SPDPRD); + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int mma9553_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct mma9553_data *data = iio_priv(indio_dev); + int ret, tmp; + + switch (mask) { + case IIO_CHAN_INFO_ENABLE: + if (data->stepcnt_enabled == !!val) + return 0; + mutex_lock(&data->mutex); + ret = mma9551_set_power_state(data->client, val); + if (ret < 0) { + mutex_unlock(&data->mutex); + return ret; + } + data->stepcnt_enabled = val; + mutex_unlock(&data->mutex); + return 0; + case IIO_CHAN_INFO_CALIBHEIGHT: + /* m to cm */ + tmp = val * 100 + val2 / 10000; + if (tmp < 0 || tmp > 255) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, + MMA9553_REG_CONF_HEIGHT_WEIGHT, + &data->conf.height_weight, + tmp, MMA9553_MASK_CONF_HEIGHT); + mutex_unlock(&data->mutex); + return ret; + case IIO_CHAN_INFO_CALIBWEIGHT: + if (val < 0 || val > 255) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, + MMA9553_REG_CONF_HEIGHT_WEIGHT, + &data->conf.height_weight, + val, MMA9553_MASK_CONF_WEIGHT); + mutex_unlock(&data->mutex); + return ret; + case IIO_CHAN_INFO_DEBOUNCE_COUNT: + switch (chan->type) { + case IIO_STEPS: + /* + * Set to 0 to disable step filtering. If the value + * specified is greater than 6, then 6 will be used. + */ + if (val < 0) + return -EINVAL; + if (val > 6) + val = 6; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, + &data->conf.filter, val, + MMA9553_MASK_CONF_FILTSTEP); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_DEBOUNCE_TIME: + switch (chan->type) { + case IIO_STEPS: + if (val < 0 || val > 127) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, + &data->conf.filter, val, + MMA9553_MASK_CONF_FILTTIME); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_INT_TIME: + switch (chan->type) { + case IIO_VELOCITY: + if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) + return -EINVAL; + /* + * If set to a value greater than 5, then 5 will be + * used. Warning: Do not set SPDPRD to 0 or 1 as + * this may cause undesirable behavior. + */ + if (val < 2) + return -EINVAL; + if (val > 5) + val = 5; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, + MMA9553_REG_CONF_SPEED_STEP, + &data->conf.speed_step, val, + MMA9553_MASK_CONF_SPDPRD); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int mma9553_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + + struct mma9553_data *data = iio_priv(indio_dev); + struct mma9553_event *event; + + event = mma9553_get_event(data, chan->type, chan->channel2, dir); + if (!event) + return -EINVAL; + + return event->enabled; +} + +static int mma9553_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, int state) +{ + struct mma9553_data *data = iio_priv(indio_dev); + struct mma9553_event *event; + int ret; + + event = mma9553_get_event(data, chan->type, chan->channel2, dir); + if (!event) + return -EINVAL; + + if (event->enabled == state) + return 0; + + mutex_lock(&data->mutex); + + ret = mma9551_set_power_state(data->client, state); + if (ret < 0) + goto err_out; + event->enabled = state; + + ret = mma9553_conf_gpio(data); + if (ret < 0) + goto err_conf_gpio; + + mutex_unlock(&data->mutex); + + return ret; + +err_conf_gpio: + if (state) { + event->enabled = false; + mma9551_set_power_state(data->client, false); + } +err_out: + mutex_unlock(&data->mutex); + return ret; +} + +static int mma9553_read_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct mma9553_data *data = iio_priv(indio_dev); + + *val2 = 0; + switch (info) { + case IIO_EV_INFO_VALUE: + switch (chan->type) { + case IIO_STEPS: + *val = mma9553_get_bits(data->conf.speed_step, + MMA9553_MASK_CONF_STEPCOALESCE); + return IIO_VAL_INT; + case IIO_ACTIVITY: + /* + * The device does not support confidence value levels. + * We set an average of 50%. + */ + *val = 50; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_EV_INFO_PERIOD: + switch (chan->type) { + case IIO_ACTIVITY: + *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd); + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int mma9553_write_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + + switch (info) { + case IIO_EV_INFO_VALUE: + switch (chan->type) { + case IIO_STEPS: + if (val < 0 || val > 255) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, + MMA9553_REG_CONF_SPEED_STEP, + &data->conf.speed_step, val, + MMA9553_MASK_CONF_STEPCOALESCE); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + case IIO_EV_INFO_PERIOD: + switch (chan->type) { + case IIO_ACTIVITY: + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD, + &data->conf.actthd, + MMA9553_ACTIVITY_SEC_TO_THD + (val), MMA9553_MASK_CONF_WORD); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct mma9553_data *data = iio_priv(indio_dev); + u8 gender; + + gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE); + /* + * HW expects 0 for female and 1 for male, + * while iio index is 0 for male and 1 for female + */ + return !gender; +} + +static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + unsigned int mode) +{ + struct mma9553_data *data = iio_priv(indio_dev); + u8 gender = !mode; + int ret; + + if ((mode != 0) && (mode != 1)) + return -EINVAL; + mutex_lock(&data->mutex); + ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, + &data->conf.filter, gender, + MMA9553_MASK_CONF_MALE); + mutex_unlock(&data->mutex); + + return ret; +} + +static const struct iio_event_spec mma9553_step_event = { + .type = IIO_EV_TYPE_CHANGE, + .dir = IIO_EV_DIR_NONE, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE), +}; + +static const struct iio_event_spec mma9553_activity_events[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_PERIOD), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_PERIOD), + }, +}; + +static const char * const calibgender_modes[] = { "male", "female" }; + +static const struct iio_enum mma9553_calibgender_enum = { + .items = calibgender_modes, + .num_items = ARRAY_SIZE(calibgender_modes), + .get = mma9553_get_calibgender_mode, + .set = mma9553_set_calibgender_mode, +}; + +static const struct iio_chan_spec_ext_info mma9553_ext_info[] = { + IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum), + IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum), + {}, +}; + +#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \ + .type = _type, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \ + BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \ + _mask, \ + .ext_info = mma9553_ext_info, \ +} + +#define MMA9553_ACTIVITY_CHANNEL(_chan2) { \ + .type = IIO_ACTIVITY, \ + .modified = 1, \ + .channel2 = _chan2, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT), \ + .event_spec = mma9553_activity_events, \ + .num_event_specs = ARRAY_SIZE(mma9553_activity_events), \ + .ext_info = mma9553_ext_info, \ +} + +static const struct iio_chan_spec mma9553_channels[] = { + MMA9551_ACCEL_CHANNEL(IIO_MOD_X), + MMA9551_ACCEL_CHANNEL(IIO_MOD_Y), + MMA9551_ACCEL_CHANNEL(IIO_MOD_Z), + + { + .type = IIO_STEPS, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_ENABLE) | + BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) | + BIT(IIO_CHAN_INFO_DEBOUNCE_TIME), + .event_spec = &mma9553_step_event, + .num_event_specs = 1, + }, + + MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)), + { + .type = IIO_VELOCITY, + .modified = 1, + .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_ENABLE), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT), + .ext_info = mma9553_ext_info, + }, + MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_CALIBWEIGHT)), + + MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING), + MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING), + MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING), + MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL), +}; + +static const struct iio_info mma9553_info = { + .driver_module = THIS_MODULE, + .read_raw = mma9553_read_raw, + .write_raw = mma9553_write_raw, + .read_event_config = mma9553_read_event_config, + .write_event_config = mma9553_write_event_config, + .read_event_value = mma9553_read_event_value, + .write_event_value = mma9553_write_event_value, +}; + +static irqreturn_t mma9553_irq_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct mma9553_data *data = iio_priv(indio_dev); + + data->timestamp = iio_get_time_ns(); + /* + * Since we only configure the interrupt pin when an + * event is enabled, we are sure we have at least + * one event enabled at this point. + */ + return IRQ_WAKE_THREAD; +} + +static irqreturn_t mma9553_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct mma9553_data *data = iio_priv(indio_dev); + u16 stepcnt; + u8 activity; + struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect; + int ret; + + mutex_lock(&data->mutex); + ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt); + if (ret < 0) { + mutex_unlock(&data->mutex); + return IRQ_HANDLED; + } + + ev_prev_activity = + mma9553_get_event(data, IIO_ACTIVITY, + mma9553_activity_to_mod(data->activity), + IIO_EV_DIR_FALLING); + ev_activity = + mma9553_get_event(data, IIO_ACTIVITY, + mma9553_activity_to_mod(activity), + IIO_EV_DIR_RISING); + ev_step_detect = + mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE); + + if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) { + data->stepcnt = stepcnt; + iio_push_event(indio_dev, + IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD, + IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0), + data->timestamp); + } + + if (activity != data->activity) { + data->activity = activity; + /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */ + if (ev_prev_activity && ev_prev_activity->enabled) + iio_push_event(indio_dev, + IIO_EVENT_CODE(IIO_ACTIVITY, 0, + ev_prev_activity->info->mod, + IIO_EV_DIR_FALLING, + IIO_EV_TYPE_THRESH, 0, 0, 0), + data->timestamp); + + if (ev_activity && ev_activity->enabled) + iio_push_event(indio_dev, + IIO_EVENT_CODE(IIO_ACTIVITY, 0, + ev_activity->info->mod, + IIO_EV_DIR_RISING, + IIO_EV_TYPE_THRESH, 0, 0, 0), + data->timestamp); + } + mutex_unlock(&data->mutex); + + return IRQ_HANDLED; +} + +static int mma9553_gpio_probe(struct i2c_client *client) +{ + struct device *dev; + struct gpio_desc *gpio; + int ret; + + if (!client) + return -EINVAL; + + dev = &client->dev; + + /* data ready gpio interrupt pin */ + gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0); + if (IS_ERR(gpio)) { + dev_err(dev, "acpi gpio get index failed\n"); + return PTR_ERR(gpio); + } + + ret = gpiod_direction_input(gpio); + if (ret) + return ret; + + ret = gpiod_to_irq(gpio); + + dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); + + return ret; +} + +static const char *mma9553_match_acpi_device(struct device *dev) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return NULL; + + return dev_name(dev); +} + +static int mma9553_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mma9553_data *data; + struct iio_dev *indio_dev; + const char *name = NULL; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + if (id) + name = id->name; + else if (ACPI_HANDLE(&client->dev)) + name = mma9553_match_acpi_device(&client->dev); + else + return -ENOSYS; + + mutex_init(&data->mutex); + mma9553_init_events(data); + + ret = mma9553_init(data); + if (ret < 0) + return ret; + + indio_dev->dev.parent = &client->dev; + indio_dev->channels = mma9553_channels; + indio_dev->num_channels = ARRAY_SIZE(mma9553_channels); + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &mma9553_info; + + if (client->irq < 0) + client->irq = mma9553_gpio_probe(client); + + if (client->irq >= 0) { + ret = devm_request_threaded_irq(&client->dev, client->irq, + mma9553_irq_handler, + mma9553_event_handler, + IRQF_TRIGGER_RISING, + MMA9553_IRQ_NAME, indio_dev); + if (ret < 0) { + dev_err(&client->dev, "request irq %d failed\n", + client->irq); + goto out_poweroff; + } + + } + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(&client->dev, "unable to register iio device\n"); + goto out_poweroff; + } + + ret = pm_runtime_set_active(&client->dev); + if (ret < 0) + goto out_iio_unregister; + + pm_runtime_enable(&client->dev); + pm_runtime_set_autosuspend_delay(&client->dev, + MMA9551_AUTO_SUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&client->dev); + + dev_dbg(&indio_dev->dev, "Registered device %s\n", name); + + return 0; + +out_iio_unregister: + iio_device_unregister(indio_dev); +out_poweroff: + mma9551_set_device_state(client, false); + return ret; +} + +static int mma9553_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct mma9553_data *data = iio_priv(indio_dev); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + iio_device_unregister(indio_dev); + mutex_lock(&data->mutex); + mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + + return 0; +} + +#ifdef CONFIG_PM +static int mma9553_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + if (ret < 0) { + dev_err(&data->client->dev, "powering off device failed\n"); + return -EAGAIN; + } + + return 0; +} + +static int mma9553_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + + ret = mma9551_set_device_state(data->client, true); + if (ret < 0) + return ret; + + mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE); + + return 0; +} +#endif + +#ifdef CONFIG_PM_SLEEP +static int mma9553_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, false); + mutex_unlock(&data->mutex); + + return ret; +} + +static int mma9553_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mma9553_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = mma9551_set_device_state(data->client, true); + mutex_unlock(&data->mutex); + + return ret; +} +#endif + +static const struct dev_pm_ops mma9553_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume) + SET_RUNTIME_PM_OPS(mma9553_runtime_suspend, + mma9553_runtime_resume, NULL) +}; + +static const struct acpi_device_id mma9553_acpi_match[] = { + {"MMA9553", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match); + +static const struct i2c_device_id mma9553_id[] = { + {"mma9553", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, mma9553_id); + +static struct i2c_driver mma9553_driver = { + .driver = { + .name = MMA9553_DRV_NAME, + .acpi_match_table = ACPI_PTR(mma9553_acpi_match), + .pm = &mma9553_pm_ops, + }, + .probe = mma9553_probe, + .remove = mma9553_remove, + .id_table = mma9553_id, +}; + +module_i2c_driver(mma9553_driver); + +MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MMA9553L pedometer platform driver"); diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c new file mode 100644 index 000000000000..4ae05fce9f24 --- /dev/null +++ b/drivers/iio/accel/ssp_accel_sensor.c @@ -0,0 +1,169 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/common/ssp_sensors.h> +#include <linux/iio/iio.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include "../common/ssp_sensors/ssp_iio_sensor.h" + +#define SSP_CHANNEL_COUNT 3 + +#define SSP_ACCEL_NAME "ssp-accelerometer" +static const char ssp_accel_device_name[] = SSP_ACCEL_NAME; + +enum ssp_accel_3d_channel { + SSP_CHANNEL_SCAN_INDEX_X, + SSP_CHANNEL_SCAN_INDEX_Y, + SSP_CHANNEL_SCAN_INDEX_Z, + SSP_CHANNEL_SCAN_INDEX_TIME, +}; + +static int ssp_accel_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + u32 t; + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR); + ssp_convert_to_freq(t, val, val2); + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + + return -EINVAL; +} + +static int ssp_accel_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + int ret; + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = ssp_convert_to_time(val, val2); + ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret); + if (ret < 0) + dev_err(&indio_dev->dev, "accel sensor enable fail\n"); + + return ret; + default: + break; + } + + return -EINVAL; +} + +static struct iio_info ssp_accel_iio_info = { + .read_raw = &ssp_accel_read_raw, + .write_raw = &ssp_accel_write_raw, +}; + +static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, }; + +static const struct iio_chan_spec ssp_acc_channels[] = { + SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), + SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), + SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), + SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), +}; + +static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf, + int64_t timestamp) +{ + return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE, + timestamp); +} + +static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = { + .postenable = &ssp_common_buffer_postenable, + .postdisable = &ssp_common_buffer_postdisable, +}; + +static int ssp_accel_probe(struct platform_device *pdev) +{ + int ret; + struct iio_dev *indio_dev; + struct ssp_sensor_data *spd; + struct iio_buffer *buffer; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd)); + if (!indio_dev) + return -ENOMEM; + + spd = iio_priv(indio_dev); + + spd->process_data = ssp_process_accel_data; + spd->type = SSP_ACCELEROMETER_SENSOR; + + indio_dev->name = ssp_accel_device_name; + indio_dev->dev.parent = &pdev->dev; + indio_dev->dev.of_node = pdev->dev.of_node; + indio_dev->info = &ssp_accel_iio_info; + indio_dev->modes = INDIO_BUFFER_SOFTWARE; + indio_dev->channels = ssp_acc_channels; + indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels); + indio_dev->available_scan_masks = ssp_accel_scan_mask; + + buffer = devm_iio_kfifo_allocate(&pdev->dev); + if (!buffer) + return -ENOMEM; + + iio_device_attach_buffer(indio_dev, buffer); + + indio_dev->setup_ops = &ssp_accel_buffer_ops; + + platform_set_drvdata(pdev, indio_dev); + + ret = iio_device_register(indio_dev); + if (ret < 0) + return ret; + + /* ssp registering should be done after all iio setup */ + ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR); + + return 0; +} + +static int ssp_accel_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + iio_device_unregister(indio_dev); + + return 0; +} + +static struct platform_driver ssp_accel_driver = { + .driver = { + .name = SSP_ACCEL_NAME, + }, + .probe = ssp_accel_probe, + .remove = ssp_accel_remove, +}; + +module_platform_driver(ssp_accel_driver); + +MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); +MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 0f79e4725763..202daf889be2 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -135,6 +135,17 @@ config AXP288_ADC device. Depending on platform configuration, this general purpose ADC can be used for sampling sensors such as thermal resistors. +config CC10001_ADC + tristate "Cosmic Circuits 10001 ADC driver" + depends on HAS_IOMEM || HAVE_CLK || REGULATOR + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Cosmic Circuits 10001 ADC. + + This driver can also be built as a module. If so, the module will be + called cc10001_adc. + config EXYNOS_ADC tristate "Exynos ADC driver support" depends on ARCH_EXYNOS || ARCH_S3C24XX || ARCH_S3C64XX || (OF && COMPILE_TEST) @@ -228,6 +239,20 @@ config QCOM_SPMI_IADC To compile this driver as a module, choose M here: the module will be called qcom-spmi-iadc. +config QCOM_SPMI_VADC + tristate "Qualcomm SPMI PMIC voltage ADC" + depends on SPMI + select REGMAP_SPMI + help + This is the IIO Voltage ADC driver for Qualcomm QPNP VADC Chip. + + The driver supports multiple channels read. The VADC is a 15-bit + sigma-delta ADC. Some of the channels are internally used for + calibration. + + To compile this driver as a module, choose M here: the module will + be called qcom-spmi-vadc. + config ROCKCHIP_SARADC tristate "Rockchip SARADC driver" depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST) diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 701fdb7c96aa..0315af640866 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_AD7887) += ad7887.o obj-$(CONFIG_AD799X) += ad799x.o obj-$(CONFIG_AT91_ADC) += at91_adc.o obj-$(CONFIG_AXP288_ADC) += axp288_adc.o +obj-$(CONFIG_CC10001_ADC) += cc10001_adc.o obj-$(CONFIG_EXYNOS_ADC) += exynos_adc.o obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o obj-$(CONFIG_MAX1027) += max1027.o @@ -24,6 +25,7 @@ obj-$(CONFIG_MCP3422) += mcp3422.o obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o obj-$(CONFIG_NAU7802) += nau7802.o obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o +obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o obj-$(CONFIG_TI_ADC128S052) += ti-adc128s052.o diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c new file mode 100644 index 000000000000..51e2a83c9404 --- /dev/null +++ b/drivers/iio/adc/cc10001_adc.c @@ -0,0 +1,423 @@ +/* + * Copyright (c) 2014-2015 Imagination Technologies Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> + +#include <linux/iio/buffer.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +/* Registers */ +#define CC10001_ADC_CONFIG 0x00 +#define CC10001_ADC_START_CONV BIT(4) +#define CC10001_ADC_MODE_SINGLE_CONV BIT(5) + +#define CC10001_ADC_DDATA_OUT 0x04 +#define CC10001_ADC_EOC 0x08 +#define CC10001_ADC_EOC_SET BIT(0) + +#define CC10001_ADC_CHSEL_SAMPLED 0x0c +#define CC10001_ADC_POWER_UP 0x10 +#define CC10001_ADC_POWER_UP_SET BIT(0) +#define CC10001_ADC_DEBUG 0x14 +#define CC10001_ADC_DATA_COUNT 0x20 + +#define CC10001_ADC_DATA_MASK GENMASK(9, 0) +#define CC10001_ADC_NUM_CHANNELS 8 +#define CC10001_ADC_CH_MASK GENMASK(2, 0) + +#define CC10001_INVALID_SAMPLED 0xffff +#define CC10001_MAX_POLL_COUNT 20 + +/* + * As per device specification, wait six clock cycles after power-up to + * activate START. Since adding two more clock cycles delay does not + * impact the performance too much, we are adding two additional cycles delay + * intentionally here. + */ +#define CC10001_WAIT_CYCLES 8 + +struct cc10001_adc_device { + void __iomem *reg_base; + struct clk *adc_clk; + struct regulator *reg; + u16 *buf; + + struct mutex lock; + unsigned long channel_map; + unsigned int start_delay_ns; + unsigned int eoc_delay_ns; +}; + +static inline void cc10001_adc_write_reg(struct cc10001_adc_device *adc_dev, + u32 reg, u32 val) +{ + writel(val, adc_dev->reg_base + reg); +} + +static inline u32 cc10001_adc_read_reg(struct cc10001_adc_device *adc_dev, + u32 reg) +{ + return readl(adc_dev->reg_base + reg); +} + +static void cc10001_adc_start(struct cc10001_adc_device *adc_dev, + unsigned int channel) +{ + u32 val; + + /* Channel selection and mode of operation */ + val = (channel & CC10001_ADC_CH_MASK) | CC10001_ADC_MODE_SINGLE_CONV; + cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val); + + val = cc10001_adc_read_reg(adc_dev, CC10001_ADC_CONFIG); + val = val | CC10001_ADC_START_CONV; + cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val); +} + +static u16 cc10001_adc_poll_done(struct iio_dev *indio_dev, + unsigned int channel, + unsigned int delay) +{ + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + unsigned int poll_count = 0; + + while (!(cc10001_adc_read_reg(adc_dev, CC10001_ADC_EOC) & + CC10001_ADC_EOC_SET)) { + + ndelay(delay); + if (poll_count++ == CC10001_MAX_POLL_COUNT) + return CC10001_INVALID_SAMPLED; + } + + poll_count = 0; + while ((cc10001_adc_read_reg(adc_dev, CC10001_ADC_CHSEL_SAMPLED) & + CC10001_ADC_CH_MASK) != channel) { + + ndelay(delay); + if (poll_count++ == CC10001_MAX_POLL_COUNT) + return CC10001_INVALID_SAMPLED; + } + + /* Read the 10 bit output register */ + return cc10001_adc_read_reg(adc_dev, CC10001_ADC_DDATA_OUT) & + CC10001_ADC_DATA_MASK; +} + +static irqreturn_t cc10001_adc_trigger_h(int irq, void *p) +{ + struct cc10001_adc_device *adc_dev; + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev; + unsigned int delay_ns; + unsigned int channel; + bool sample_invalid; + u16 *data; + int i; + + indio_dev = pf->indio_dev; + adc_dev = iio_priv(indio_dev); + data = adc_dev->buf; + + mutex_lock(&adc_dev->lock); + + cc10001_adc_write_reg(adc_dev, CC10001_ADC_POWER_UP, + CC10001_ADC_POWER_UP_SET); + + /* Wait for 8 (6+2) clock cycles before activating START */ + ndelay(adc_dev->start_delay_ns); + + /* Calculate delay step for eoc and sampled data */ + delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT; + + i = 0; + sample_invalid = false; + for_each_set_bit(channel, indio_dev->active_scan_mask, + indio_dev->masklength) { + + cc10001_adc_start(adc_dev, channel); + + data[i] = cc10001_adc_poll_done(indio_dev, channel, delay_ns); + if (data[i] == CC10001_INVALID_SAMPLED) { + dev_warn(&indio_dev->dev, + "invalid sample on channel %d\n", channel); + sample_invalid = true; + goto done; + } + i++; + } + +done: + cc10001_adc_write_reg(adc_dev, CC10001_ADC_POWER_UP, 0); + + mutex_unlock(&adc_dev->lock); + + if (!sample_invalid) + iio_push_to_buffers_with_timestamp(indio_dev, data, + iio_get_time_ns()); + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static u16 cc10001_adc_read_raw_voltage(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan) +{ + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + unsigned int delay_ns; + u16 val; + + cc10001_adc_write_reg(adc_dev, CC10001_ADC_POWER_UP, + CC10001_ADC_POWER_UP_SET); + + /* Wait for 8 (6+2) clock cycles before activating START */ + ndelay(adc_dev->start_delay_ns); + + /* Calculate delay step for eoc and sampled data */ + delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT; + + cc10001_adc_start(adc_dev, chan->channel); + + val = cc10001_adc_poll_done(indio_dev, chan->channel, delay_ns); + + cc10001_adc_write_reg(adc_dev, CC10001_ADC_POWER_UP, 0); + + return val; +} + +static int cc10001_adc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + mutex_lock(&adc_dev->lock); + *val = cc10001_adc_read_raw_voltage(indio_dev, chan); + mutex_unlock(&adc_dev->lock); + + if (*val == CC10001_INVALID_SAMPLED) + return -EIO; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + ret = regulator_get_voltage(adc_dev->reg); + if (ret) + return ret; + + *val = ret / 1000; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; + + default: + return -EINVAL; + } +} + +static int cc10001_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + + kfree(adc_dev->buf); + adc_dev->buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (!adc_dev->buf) + return -ENOMEM; + + return 0; +} + +static const struct iio_info cc10001_adc_info = { + .driver_module = THIS_MODULE, + .read_raw = &cc10001_adc_read_raw, + .update_scan_mode = &cc10001_update_scan_mode, +}; + +static int cc10001_adc_channel_init(struct iio_dev *indio_dev) +{ + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + struct iio_chan_spec *chan_array, *timestamp; + unsigned int bit, idx = 0; + + indio_dev->num_channels = bitmap_weight(&adc_dev->channel_map, + CC10001_ADC_NUM_CHANNELS); + + chan_array = devm_kcalloc(&indio_dev->dev, indio_dev->num_channels + 1, + sizeof(struct iio_chan_spec), + GFP_KERNEL); + if (!chan_array) + return -ENOMEM; + + for_each_set_bit(bit, &adc_dev->channel_map, CC10001_ADC_NUM_CHANNELS) { + struct iio_chan_spec *chan = &chan_array[idx]; + + chan->type = IIO_VOLTAGE; + chan->indexed = 1; + chan->channel = bit; + chan->scan_index = idx; + chan->scan_type.sign = 'u'; + chan->scan_type.realbits = 10; + chan->scan_type.storagebits = 16; + chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); + chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); + idx++; + } + + timestamp = &chan_array[idx]; + timestamp->type = IIO_TIMESTAMP; + timestamp->channel = -1; + timestamp->scan_index = idx; + timestamp->scan_type.sign = 's'; + timestamp->scan_type.realbits = 64; + timestamp->scan_type.storagebits = 64; + + indio_dev->channels = chan_array; + + return 0; +} + +static int cc10001_adc_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct cc10001_adc_device *adc_dev; + unsigned long adc_clk_rate; + struct resource *res; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc_dev)); + if (indio_dev == NULL) + return -ENOMEM; + + adc_dev = iio_priv(indio_dev); + + adc_dev->channel_map = GENMASK(CC10001_ADC_NUM_CHANNELS - 1, 0); + if (!of_property_read_u32(node, "adc-reserved-channels", &ret)) + adc_dev->channel_map &= ~ret; + + adc_dev->reg = devm_regulator_get(&pdev->dev, "vref"); + if (IS_ERR(adc_dev->reg)) + return PTR_ERR(adc_dev->reg); + + ret = regulator_enable(adc_dev->reg); + if (ret) + return ret; + + indio_dev->dev.parent = &pdev->dev; + indio_dev->name = dev_name(&pdev->dev); + indio_dev->info = &cc10001_adc_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + adc_dev->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(adc_dev->reg_base)) { + ret = PTR_ERR(adc_dev->reg_base); + goto err_disable_reg; + } + + adc_dev->adc_clk = devm_clk_get(&pdev->dev, "adc"); + if (IS_ERR(adc_dev->adc_clk)) { + dev_err(&pdev->dev, "failed to get the clock\n"); + ret = PTR_ERR(adc_dev->adc_clk); + goto err_disable_reg; + } + + ret = clk_prepare_enable(adc_dev->adc_clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable the clock\n"); + goto err_disable_reg; + } + + adc_clk_rate = clk_get_rate(adc_dev->adc_clk); + if (!adc_clk_rate) { + ret = -EINVAL; + dev_err(&pdev->dev, "null clock rate!\n"); + goto err_disable_clk; + } + + adc_dev->eoc_delay_ns = NSEC_PER_SEC / adc_clk_rate; + adc_dev->start_delay_ns = adc_dev->eoc_delay_ns * CC10001_WAIT_CYCLES; + + /* Setup the ADC channels available on the device */ + ret = cc10001_adc_channel_init(indio_dev); + if (ret < 0) + goto err_disable_clk; + + mutex_init(&adc_dev->lock); + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &cc10001_adc_trigger_h, NULL); + if (ret < 0) + goto err_disable_clk; + + ret = iio_device_register(indio_dev); + if (ret < 0) + goto err_cleanup_buffer; + + platform_set_drvdata(pdev, indio_dev); + + return 0; + +err_cleanup_buffer: + iio_triggered_buffer_cleanup(indio_dev); +err_disable_clk: + clk_disable_unprepare(adc_dev->adc_clk); +err_disable_reg: + regulator_disable(adc_dev->reg); + return ret; +} + +static int cc10001_adc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct cc10001_adc_device *adc_dev = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + clk_disable_unprepare(adc_dev->adc_clk); + regulator_disable(adc_dev->reg); + + return 0; +} + +static const struct of_device_id cc10001_adc_dt_ids[] = { + { .compatible = "cosmic,10001-adc", }, + { } +}; +MODULE_DEVICE_TABLE(of, cc10001_adc_dt_ids); + +static struct platform_driver cc10001_adc_driver = { + .driver = { + .name = "cc10001-adc", + .of_match_table = cc10001_adc_dt_ids, + }, + .probe = cc10001_adc_probe, + .remove = cc10001_adc_remove, +}; +module_platform_driver(cc10001_adc_driver); + +MODULE_AUTHOR("Phani Movva <Phani.Movva@imgtec.com>"); +MODULE_DESCRIPTION("Cosmic Circuits ADC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c new file mode 100644 index 000000000000..3211729bcb0b --- /dev/null +++ b/drivers/iio/adc/qcom-spmi-vadc.c @@ -0,0 +1,1016 @@ +/* + * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/bitops.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/iio/iio.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/log2.h> + +#include <dt-bindings/iio/qcom,spmi-vadc.h> + +/* VADC register and bit definitions */ +#define VADC_REVISION2 0x1 +#define VADC_REVISION2_SUPPORTED_VADC 1 + +#define VADC_PERPH_TYPE 0x4 +#define VADC_PERPH_TYPE_ADC 8 + +#define VADC_PERPH_SUBTYPE 0x5 +#define VADC_PERPH_SUBTYPE_VADC 1 + +#define VADC_STATUS1 0x8 +#define VADC_STATUS1_OP_MODE 4 +#define VADC_STATUS1_REQ_STS BIT(1) +#define VADC_STATUS1_EOC BIT(0) +#define VADC_STATUS1_REQ_STS_EOC_MASK 0x3 + +#define VADC_MODE_CTL 0x40 +#define VADC_OP_MODE_SHIFT 3 +#define VADC_OP_MODE_NORMAL 0 +#define VADC_AMUX_TRIM_EN BIT(1) +#define VADC_ADC_TRIM_EN BIT(0) + +#define VADC_EN_CTL1 0x46 +#define VADC_EN_CTL1_SET BIT(7) + +#define VADC_ADC_CH_SEL_CTL 0x48 + +#define VADC_ADC_DIG_PARAM 0x50 +#define VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT 2 + +#define VADC_HW_SETTLE_DELAY 0x51 + +#define VADC_CONV_REQ 0x52 +#define VADC_CONV_REQ_SET BIT(7) + +#define VADC_FAST_AVG_CTL 0x5a +#define VADC_FAST_AVG_EN 0x5b +#define VADC_FAST_AVG_EN_SET BIT(7) + +#define VADC_ACCESS 0xd0 +#define VADC_ACCESS_DATA 0xa5 + +#define VADC_PERH_RESET_CTL3 0xda +#define VADC_FOLLOW_WARM_RB BIT(2) + +#define VADC_DATA 0x60 /* 16 bits */ + +#define VADC_CONV_TIME_MIN_US 2000 +#define VADC_CONV_TIME_MAX_US 2100 + +/* Min ADC code represents 0V */ +#define VADC_MIN_ADC_CODE 0x6000 +/* Max ADC code represents full-scale range of 1.8V */ +#define VADC_MAX_ADC_CODE 0xa800 + +#define VADC_ABSOLUTE_RANGE_UV 625000 +#define VADC_RATIOMETRIC_RANGE_UV 1800000 + +#define VADC_DEF_PRESCALING 0 /* 1:1 */ +#define VADC_DEF_DECIMATION 0 /* 512 */ +#define VADC_DEF_HW_SETTLE_TIME 0 /* 0 us */ +#define VADC_DEF_AVG_SAMPLES 0 /* 1 sample */ +#define VADC_DEF_CALIB_TYPE VADC_CALIB_ABSOLUTE + +#define VADC_DECIMATION_MIN 512 +#define VADC_DECIMATION_MAX 4096 + +#define VADC_HW_SETTLE_DELAY_MAX 10000 +#define VADC_AVG_SAMPLES_MAX 512 + +#define KELVINMIL_CELSIUSMIL 273150 + +#define VADC_CHAN_MIN VADC_USBIN +#define VADC_CHAN_MAX VADC_LR_MUX3_BUF_PU1_PU2_XO_THERM + +/* + * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels. + * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for + * calibration. + */ +enum vadc_calibration { + VADC_CALIB_ABSOLUTE = 0, + VADC_CALIB_RATIOMETRIC +}; + +/** + * struct vadc_linear_graph - Represent ADC characteristics. + * @dy: numerator slope to calculate the gain. + * @dx: denominator slope to calculate the gain. + * @gnd: A/D word of the ground reference used for the channel. + * + * Each ADC device has different offset and gain parameters which are + * computed to calibrate the device. + */ +struct vadc_linear_graph { + s32 dy; + s32 dx; + s32 gnd; +}; + +/** + * struct vadc_prescale_ratio - Represent scaling ratio for ADC input. + * @num: the inverse numerator of the gain applied to the input channel. + * @den: the inverse denominator of the gain applied to the input channel. + */ +struct vadc_prescale_ratio { + u32 num; + u32 den; +}; + +/** + * struct vadc_channel_prop - VADC channel property. + * @channel: channel number, refer to the channel list. + * @calibration: calibration type. + * @decimation: sampling rate supported for the channel. + * @prescale: channel scaling performed on the input signal. + * @hw_settle_time: the time between AMUX being configured and the + * start of conversion. + * @avg_samples: ability to provide single result from the ADC + * that is an average of multiple measurements. + */ +struct vadc_channel_prop { + unsigned int channel; + enum vadc_calibration calibration; + unsigned int decimation; + unsigned int prescale; + unsigned int hw_settle_time; + unsigned int avg_samples; +}; + +/** + * struct vadc_priv - VADC private structure. + * @regmap: pointer to struct regmap. + * @dev: pointer to struct device. + * @base: base address for the ADC peripheral. + * @nchannels: number of VADC channels. + * @chan_props: array of VADC channel properties. + * @iio_chans: array of IIO channels specification. + * @are_ref_measured: are reference points measured. + * @poll_eoc: use polling instead of interrupt. + * @complete: VADC result notification after interrupt is received. + * @graph: store parameters for calibration. + * @lock: ADC lock for access to the peripheral. + */ +struct vadc_priv { + struct regmap *regmap; + struct device *dev; + u16 base; + unsigned int nchannels; + struct vadc_channel_prop *chan_props; + struct iio_chan_spec *iio_chans; + bool are_ref_measured; + bool poll_eoc; + struct completion complete; + struct vadc_linear_graph graph[2]; + struct mutex lock; +}; + +static const struct vadc_prescale_ratio vadc_prescale_ratios[] = { + {.num = 1, .den = 1}, + {.num = 1, .den = 3}, + {.num = 1, .den = 4}, + {.num = 1, .den = 6}, + {.num = 1, .den = 20}, + {.num = 1, .den = 8}, + {.num = 10, .den = 81}, + {.num = 1, .den = 10} +}; + +static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data) +{ + return regmap_bulk_read(vadc->regmap, vadc->base + offset, data, 1); +} + +static int vadc_write(struct vadc_priv *vadc, u16 offset, u8 data) +{ + return regmap_write(vadc->regmap, vadc->base + offset, data); +} + +static int vadc_reset(struct vadc_priv *vadc) +{ + u8 data; + int ret; + + ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA); + if (ret) + return ret; + + ret = vadc_read(vadc, VADC_PERH_RESET_CTL3, &data); + if (ret) + return ret; + + ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA); + if (ret) + return ret; + + data |= VADC_FOLLOW_WARM_RB; + + return vadc_write(vadc, VADC_PERH_RESET_CTL3, data); +} + +static int vadc_set_state(struct vadc_priv *vadc, bool state) +{ + return vadc_write(vadc, VADC_EN_CTL1, state ? VADC_EN_CTL1_SET : 0); +} + +static void vadc_show_status(struct vadc_priv *vadc) +{ + u8 mode, sta1, chan, dig, en, req; + int ret; + + ret = vadc_read(vadc, VADC_MODE_CTL, &mode); + if (ret) + return; + + ret = vadc_read(vadc, VADC_ADC_DIG_PARAM, &dig); + if (ret) + return; + + ret = vadc_read(vadc, VADC_ADC_CH_SEL_CTL, &chan); + if (ret) + return; + + ret = vadc_read(vadc, VADC_CONV_REQ, &req); + if (ret) + return; + + ret = vadc_read(vadc, VADC_STATUS1, &sta1); + if (ret) + return; + + ret = vadc_read(vadc, VADC_EN_CTL1, &en); + if (ret) + return; + + dev_err(vadc->dev, + "mode:%02x en:%02x chan:%02x dig:%02x req:%02x sta1:%02x\n", + mode, en, chan, dig, req, sta1); +} + +static int vadc_configure(struct vadc_priv *vadc, + struct vadc_channel_prop *prop) +{ + u8 decimation, mode_ctrl; + int ret; + + /* Mode selection */ + mode_ctrl = (VADC_OP_MODE_NORMAL << VADC_OP_MODE_SHIFT) | + VADC_ADC_TRIM_EN | VADC_AMUX_TRIM_EN; + ret = vadc_write(vadc, VADC_MODE_CTL, mode_ctrl); + if (ret) + return ret; + + /* Channel selection */ + ret = vadc_write(vadc, VADC_ADC_CH_SEL_CTL, prop->channel); + if (ret) + return ret; + + /* Digital parameter setup */ + decimation = prop->decimation << VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT; + ret = vadc_write(vadc, VADC_ADC_DIG_PARAM, decimation); + if (ret) + return ret; + + /* HW settle time delay */ + ret = vadc_write(vadc, VADC_HW_SETTLE_DELAY, prop->hw_settle_time); + if (ret) + return ret; + + ret = vadc_write(vadc, VADC_FAST_AVG_CTL, prop->avg_samples); + if (ret) + return ret; + + if (prop->avg_samples) + ret = vadc_write(vadc, VADC_FAST_AVG_EN, VADC_FAST_AVG_EN_SET); + else + ret = vadc_write(vadc, VADC_FAST_AVG_EN, 0); + + return ret; +} + +static int vadc_poll_wait_eoc(struct vadc_priv *vadc, unsigned int interval_us) +{ + unsigned int count, retry; + u8 sta1; + int ret; + + retry = interval_us / VADC_CONV_TIME_MIN_US; + + for (count = 0; count < retry; count++) { + ret = vadc_read(vadc, VADC_STATUS1, &sta1); + if (ret) + return ret; + + sta1 &= VADC_STATUS1_REQ_STS_EOC_MASK; + if (sta1 == VADC_STATUS1_EOC) + return 0; + + usleep_range(VADC_CONV_TIME_MIN_US, VADC_CONV_TIME_MAX_US); + } + + vadc_show_status(vadc); + + return -ETIMEDOUT; +} + +static int vadc_read_result(struct vadc_priv *vadc, u16 *data) +{ + int ret; + + ret = regmap_bulk_read(vadc->regmap, vadc->base + VADC_DATA, data, 2); + if (ret) + return ret; + + *data = clamp_t(u16, *data, VADC_MIN_ADC_CODE, VADC_MAX_ADC_CODE); + + return 0; +} + +static struct vadc_channel_prop *vadc_get_channel(struct vadc_priv *vadc, + unsigned int num) +{ + unsigned int i; + + for (i = 0; i < vadc->nchannels; i++) + if (vadc->chan_props[i].channel == num) + return &vadc->chan_props[i]; + + dev_dbg(vadc->dev, "no such channel %02x\n", num); + + return NULL; +} + +static int vadc_do_conversion(struct vadc_priv *vadc, + struct vadc_channel_prop *prop, u16 *data) +{ + unsigned int timeout; + int ret; + + mutex_lock(&vadc->lock); + + ret = vadc_configure(vadc, prop); + if (ret) + goto unlock; + + if (!vadc->poll_eoc) + reinit_completion(&vadc->complete); + + ret = vadc_set_state(vadc, true); + if (ret) + goto unlock; + + ret = vadc_write(vadc, VADC_CONV_REQ, VADC_CONV_REQ_SET); + if (ret) + goto err_disable; + + timeout = BIT(prop->avg_samples) * VADC_CONV_TIME_MIN_US * 2; + + if (vadc->poll_eoc) { + ret = vadc_poll_wait_eoc(vadc, timeout); + } else { + ret = wait_for_completion_timeout(&vadc->complete, timeout); + if (!ret) { + ret = -ETIMEDOUT; + goto err_disable; + } + + /* Double check conversion status */ + ret = vadc_poll_wait_eoc(vadc, VADC_CONV_TIME_MIN_US); + if (ret) + goto err_disable; + } + + ret = vadc_read_result(vadc, data); + +err_disable: + vadc_set_state(vadc, false); + if (ret) + dev_err(vadc->dev, "conversion failed\n"); +unlock: + mutex_unlock(&vadc->lock); + return ret; +} + +static int vadc_measure_ref_points(struct vadc_priv *vadc) +{ + struct vadc_channel_prop *prop; + u16 read_1, read_2; + int ret; + + vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE_UV; + vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV; + + prop = vadc_get_channel(vadc, VADC_REF_1250MV); + ret = vadc_do_conversion(vadc, prop, &read_1); + if (ret) + goto err; + + /* Try with buffered 625mV channel first */ + prop = vadc_get_channel(vadc, VADC_SPARE1); + if (!prop) + prop = vadc_get_channel(vadc, VADC_REF_625MV); + + ret = vadc_do_conversion(vadc, prop, &read_2); + if (ret) + goto err; + + if (read_1 == read_2) { + ret = -EINVAL; + goto err; + } + + vadc->graph[VADC_CALIB_ABSOLUTE].dy = read_1 - read_2; + vadc->graph[VADC_CALIB_ABSOLUTE].gnd = read_2; + + /* Ratiometric calibration */ + prop = vadc_get_channel(vadc, VADC_VDD_VADC); + ret = vadc_do_conversion(vadc, prop, &read_1); + if (ret) + goto err; + + prop = vadc_get_channel(vadc, VADC_GND_REF); + ret = vadc_do_conversion(vadc, prop, &read_2); + if (ret) + goto err; + + if (read_1 == read_2) { + ret = -EINVAL; + goto err; + } + + vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2; + vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2; +err: + if (ret) + dev_err(vadc->dev, "measure reference points failed\n"); + + return ret; +} + +static s32 vadc_calibrate(struct vadc_priv *vadc, + const struct vadc_channel_prop *prop, u16 adc_code) +{ + const struct vadc_prescale_ratio *prescale; + s32 voltage; + + voltage = adc_code - vadc->graph[prop->calibration].gnd; + voltage *= vadc->graph[prop->calibration].dx; + voltage = voltage / vadc->graph[prop->calibration].dy; + + if (prop->calibration == VADC_CALIB_ABSOLUTE) + voltage += vadc->graph[prop->calibration].dx; + + if (voltage < 0) + voltage = 0; + + prescale = &vadc_prescale_ratios[prop->prescale]; + + voltage = voltage * prescale->den; + + return voltage / prescale->num; +} + +static int vadc_decimation_from_dt(u32 value) +{ + if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN || + value > VADC_DECIMATION_MAX) + return -EINVAL; + + return __ffs64(value / VADC_DECIMATION_MIN); +} + +static int vadc_prescaling_from_dt(u32 num, u32 den) +{ + unsigned int pre; + + for (pre = 0; pre < ARRAY_SIZE(vadc_prescale_ratios); pre++) + if (vadc_prescale_ratios[pre].num == num && + vadc_prescale_ratios[pre].den == den) + break; + + if (pre == ARRAY_SIZE(vadc_prescale_ratios)) + return -EINVAL; + + return pre; +} + +static int vadc_hw_settle_time_from_dt(u32 value) +{ + if ((value <= 1000 && value % 100) || (value > 1000 && value % 2000)) + return -EINVAL; + + if (value <= 1000) + value /= 100; + else + value = value / 2000 + 10; + + return value; +} + +static int vadc_avg_samples_from_dt(u32 value) +{ + if (!is_power_of_2(value) || value > VADC_AVG_SAMPLES_MAX) + return -EINVAL; + + return __ffs64(value); +} + +static int vadc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, + long mask) +{ + struct vadc_priv *vadc = iio_priv(indio_dev); + struct vadc_channel_prop *prop; + u16 adc_code; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + prop = &vadc->chan_props[chan->address]; + ret = vadc_do_conversion(vadc, prop, &adc_code); + if (ret) + break; + + *val = vadc_calibrate(vadc, prop, adc_code); + + /* 2mV/K, return milli Celsius */ + *val /= 2; + *val -= KELVINMIL_CELSIUSMIL; + return IIO_VAL_INT; + case IIO_CHAN_INFO_RAW: + prop = &vadc->chan_props[chan->address]; + ret = vadc_do_conversion(vadc, prop, &adc_code); + if (ret) + break; + + *val = vadc_calibrate(vadc, prop, adc_code); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = 1000; + return IIO_VAL_INT_PLUS_MICRO; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int vadc_of_xlate(struct iio_dev *indio_dev, + const struct of_phandle_args *iiospec) +{ + struct vadc_priv *vadc = iio_priv(indio_dev); + unsigned int i; + + for (i = 0; i < vadc->nchannels; i++) + if (vadc->iio_chans[i].channel == iiospec->args[0]) + return i; + + return -EINVAL; +} + +static const struct iio_info vadc_info = { + .read_raw = vadc_read_raw, + .of_xlate = vadc_of_xlate, + .driver_module = THIS_MODULE, +}; + +struct vadc_channels { + const char *datasheet_name; + unsigned int prescale_index; + enum iio_chan_type type; + long info_mask; +}; + +#define VADC_CHAN(_dname, _type, _mask, _pre) \ + [VADC_##_dname] = { \ + .datasheet_name = __stringify(_dname), \ + .prescale_index = _pre, \ + .type = _type, \ + .info_mask = _mask \ + }, \ + +#define VADC_CHAN_TEMP(_dname, _pre) \ + VADC_CHAN(_dname, IIO_TEMP, BIT(IIO_CHAN_INFO_PROCESSED), _pre) \ + +#define VADC_CHAN_VOLT(_dname, _pre) \ + VADC_CHAN(_dname, IIO_VOLTAGE, \ + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \ + _pre) \ + +/* + * The array represents all possible ADC channels found in the supported PMICs. + * Every index in the array is equal to the channel number per datasheet. The + * gaps in the array should be treated as reserved channels. + */ +static const struct vadc_channels vadc_chans[] = { + VADC_CHAN_VOLT(USBIN, 4) + VADC_CHAN_VOLT(DCIN, 4) + VADC_CHAN_VOLT(VCHG_SNS, 3) + VADC_CHAN_VOLT(SPARE1_03, 1) + VADC_CHAN_VOLT(USB_ID_MV, 1) + VADC_CHAN_VOLT(VCOIN, 1) + VADC_CHAN_VOLT(VBAT_SNS, 1) + VADC_CHAN_VOLT(VSYS, 1) + VADC_CHAN_TEMP(DIE_TEMP, 0) + VADC_CHAN_VOLT(REF_625MV, 0) + VADC_CHAN_VOLT(REF_1250MV, 0) + VADC_CHAN_VOLT(CHG_TEMP, 0) + VADC_CHAN_VOLT(SPARE1, 0) + VADC_CHAN_VOLT(SPARE2, 0) + VADC_CHAN_VOLT(GND_REF, 0) + VADC_CHAN_VOLT(VDD_VADC, 0) + + VADC_CHAN_VOLT(P_MUX1_1_1, 0) + VADC_CHAN_VOLT(P_MUX2_1_1, 0) + VADC_CHAN_VOLT(P_MUX3_1_1, 0) + VADC_CHAN_VOLT(P_MUX4_1_1, 0) + VADC_CHAN_VOLT(P_MUX5_1_1, 0) + VADC_CHAN_VOLT(P_MUX6_1_1, 0) + VADC_CHAN_VOLT(P_MUX7_1_1, 0) + VADC_CHAN_VOLT(P_MUX8_1_1, 0) + VADC_CHAN_VOLT(P_MUX9_1_1, 0) + VADC_CHAN_VOLT(P_MUX10_1_1, 0) + VADC_CHAN_VOLT(P_MUX11_1_1, 0) + VADC_CHAN_VOLT(P_MUX12_1_1, 0) + VADC_CHAN_VOLT(P_MUX13_1_1, 0) + VADC_CHAN_VOLT(P_MUX14_1_1, 0) + VADC_CHAN_VOLT(P_MUX15_1_1, 0) + VADC_CHAN_VOLT(P_MUX16_1_1, 0) + + VADC_CHAN_VOLT(P_MUX1_1_3, 1) + VADC_CHAN_VOLT(P_MUX2_1_3, 1) + VADC_CHAN_VOLT(P_MUX3_1_3, 1) + VADC_CHAN_VOLT(P_MUX4_1_3, 1) + VADC_CHAN_VOLT(P_MUX5_1_3, 1) + VADC_CHAN_VOLT(P_MUX6_1_3, 1) + VADC_CHAN_VOLT(P_MUX7_1_3, 1) + VADC_CHAN_VOLT(P_MUX8_1_3, 1) + VADC_CHAN_VOLT(P_MUX9_1_3, 1) + VADC_CHAN_VOLT(P_MUX10_1_3, 1) + VADC_CHAN_VOLT(P_MUX11_1_3, 1) + VADC_CHAN_VOLT(P_MUX12_1_3, 1) + VADC_CHAN_VOLT(P_MUX13_1_3, 1) + VADC_CHAN_VOLT(P_MUX14_1_3, 1) + VADC_CHAN_VOLT(P_MUX15_1_3, 1) + VADC_CHAN_VOLT(P_MUX16_1_3, 1) + + VADC_CHAN_VOLT(LR_MUX1_BAT_THERM, 0) + VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_XO_THERM, 0) + VADC_CHAN_VOLT(LR_MUX4_AMUX_THM1, 0) + VADC_CHAN_VOLT(LR_MUX5_AMUX_THM2, 0) + VADC_CHAN_VOLT(LR_MUX6_AMUX_THM3, 0) + VADC_CHAN_VOLT(LR_MUX7_HW_ID, 0) + VADC_CHAN_VOLT(LR_MUX8_AMUX_THM4, 0) + VADC_CHAN_VOLT(LR_MUX9_AMUX_THM5, 0) + VADC_CHAN_VOLT(LR_MUX10_USB_ID, 0) + VADC_CHAN_VOLT(AMUX_PU1, 0) + VADC_CHAN_VOLT(AMUX_PU2, 0) + VADC_CHAN_VOLT(LR_MUX3_BUF_XO_THERM, 0) + + VADC_CHAN_VOLT(LR_MUX1_PU1_BAT_THERM, 0) + VADC_CHAN_VOLT(LR_MUX2_PU1_BAT_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_PU1_XO_THERM, 0) + VADC_CHAN_VOLT(LR_MUX4_PU1_AMUX_THM1, 0) + VADC_CHAN_VOLT(LR_MUX5_PU1_AMUX_THM2, 0) + VADC_CHAN_VOLT(LR_MUX6_PU1_AMUX_THM3, 0) + VADC_CHAN_VOLT(LR_MUX7_PU1_AMUX_HW_ID, 0) + VADC_CHAN_VOLT(LR_MUX8_PU1_AMUX_THM4, 0) + VADC_CHAN_VOLT(LR_MUX9_PU1_AMUX_THM5, 0) + VADC_CHAN_VOLT(LR_MUX10_PU1_AMUX_USB_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_BUF_PU1_XO_THERM, 0) + + VADC_CHAN_VOLT(LR_MUX1_PU2_BAT_THERM, 0) + VADC_CHAN_VOLT(LR_MUX2_PU2_BAT_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_PU2_XO_THERM, 0) + VADC_CHAN_VOLT(LR_MUX4_PU2_AMUX_THM1, 0) + VADC_CHAN_VOLT(LR_MUX5_PU2_AMUX_THM2, 0) + VADC_CHAN_VOLT(LR_MUX6_PU2_AMUX_THM3, 0) + VADC_CHAN_VOLT(LR_MUX7_PU2_AMUX_HW_ID, 0) + VADC_CHAN_VOLT(LR_MUX8_PU2_AMUX_THM4, 0) + VADC_CHAN_VOLT(LR_MUX9_PU2_AMUX_THM5, 0) + VADC_CHAN_VOLT(LR_MUX10_PU2_AMUX_USB_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_BUF_PU2_XO_THERM, 0) + + VADC_CHAN_VOLT(LR_MUX1_PU1_PU2_BAT_THERM, 0) + VADC_CHAN_VOLT(LR_MUX2_PU1_PU2_BAT_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_PU1_PU2_XO_THERM, 0) + VADC_CHAN_VOLT(LR_MUX4_PU1_PU2_AMUX_THM1, 0) + VADC_CHAN_VOLT(LR_MUX5_PU1_PU2_AMUX_THM2, 0) + VADC_CHAN_VOLT(LR_MUX6_PU1_PU2_AMUX_THM3, 0) + VADC_CHAN_VOLT(LR_MUX7_PU1_PU2_AMUX_HW_ID, 0) + VADC_CHAN_VOLT(LR_MUX8_PU1_PU2_AMUX_THM4, 0) + VADC_CHAN_VOLT(LR_MUX9_PU1_PU2_AMUX_THM5, 0) + VADC_CHAN_VOLT(LR_MUX10_PU1_PU2_AMUX_USB_ID, 0) + VADC_CHAN_VOLT(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0) +}; + +static int vadc_get_dt_channel_data(struct device *dev, + struct vadc_channel_prop *prop, + struct device_node *node) +{ + const char *name = node->name; + u32 chan, value, varr[2]; + int ret; + + ret = of_property_read_u32(node, "reg", &chan); + if (ret) { + dev_err(dev, "invalid channel number %s\n", name); + return ret; + } + + if (chan > VADC_CHAN_MAX || chan < VADC_CHAN_MIN) { + dev_err(dev, "%s invalid channel number %d\n", name, chan); + return -EINVAL; + } + + /* the channel has DT description */ + prop->channel = chan; + + ret = of_property_read_u32(node, "qcom,decimation", &value); + if (!ret) { + ret = vadc_decimation_from_dt(value); + if (ret < 0) { + dev_err(dev, "%02x invalid decimation %d\n", + chan, value); + return ret; + } + prop->decimation = ret; + } else { + prop->decimation = VADC_DEF_DECIMATION; + } + + ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2); + if (!ret) { + ret = vadc_prescaling_from_dt(varr[0], varr[1]); + if (ret < 0) { + dev_err(dev, "%02x invalid pre-scaling <%d %d>\n", + chan, varr[0], varr[1]); + return ret; + } + prop->prescale = ret; + } else { + prop->prescale = vadc_chans[prop->channel].prescale_index; + } + + ret = of_property_read_u32(node, "qcom,hw-settle-time", &value); + if (!ret) { + ret = vadc_hw_settle_time_from_dt(value); + if (ret < 0) { + dev_err(dev, "%02x invalid hw-settle-time %d us\n", + chan, value); + return ret; + } + prop->hw_settle_time = ret; + } else { + prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME; + } + + ret = of_property_read_u32(node, "qcom,avg-samples", &value); + if (!ret) { + ret = vadc_avg_samples_from_dt(value); + if (ret < 0) { + dev_err(dev, "%02x invalid avg-samples %d\n", + chan, value); + return ret; + } + prop->avg_samples = ret; + } else { + prop->avg_samples = VADC_DEF_AVG_SAMPLES; + } + + if (of_property_read_bool(node, "qcom,ratiometric")) + prop->calibration = VADC_CALIB_RATIOMETRIC; + else + prop->calibration = VADC_CALIB_ABSOLUTE; + + dev_dbg(dev, "%02x name %s\n", chan, name); + + return 0; +} + +static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node) +{ + const struct vadc_channels *vadc_chan; + struct iio_chan_spec *iio_chan; + struct vadc_channel_prop prop; + struct device_node *child; + unsigned int index = 0; + int ret; + + vadc->nchannels = of_get_available_child_count(node); + if (!vadc->nchannels) + return -EINVAL; + + vadc->iio_chans = devm_kcalloc(vadc->dev, vadc->nchannels, + sizeof(*vadc->iio_chans), GFP_KERNEL); + if (!vadc->iio_chans) + return -ENOMEM; + + vadc->chan_props = devm_kcalloc(vadc->dev, vadc->nchannels, + sizeof(*vadc->chan_props), GFP_KERNEL); + if (!vadc->chan_props) + return -ENOMEM; + + iio_chan = vadc->iio_chans; + + for_each_available_child_of_node(node, child) { + ret = vadc_get_dt_channel_data(vadc->dev, &prop, child); + if (ret) + return ret; + + vadc->chan_props[index] = prop; + + vadc_chan = &vadc_chans[prop.channel]; + + iio_chan->channel = prop.channel; + iio_chan->datasheet_name = vadc_chan->datasheet_name; + iio_chan->info_mask_separate = vadc_chan->info_mask; + iio_chan->type = vadc_chan->type; + iio_chan->indexed = 1; + iio_chan->address = index++; + + iio_chan++; + } + + /* These channels are mandatory, they are used as reference points */ + if (!vadc_get_channel(vadc, VADC_REF_1250MV)) { + dev_err(vadc->dev, "Please define 1.25V channel\n"); + return -ENODEV; + } + + if (!vadc_get_channel(vadc, VADC_REF_625MV)) { + dev_err(vadc->dev, "Please define 0.625V channel\n"); + return -ENODEV; + } + + if (!vadc_get_channel(vadc, VADC_VDD_VADC)) { + dev_err(vadc->dev, "Please define VDD channel\n"); + return -ENODEV; + } + + if (!vadc_get_channel(vadc, VADC_GND_REF)) { + dev_err(vadc->dev, "Please define GND channel\n"); + return -ENODEV; + } + + return 0; +} + +static irqreturn_t vadc_isr(int irq, void *dev_id) +{ + struct vadc_priv *vadc = dev_id; + + complete(&vadc->complete); + + return IRQ_HANDLED; +} + +static int vadc_check_revision(struct vadc_priv *vadc) +{ + u8 val; + int ret; + + ret = vadc_read(vadc, VADC_PERPH_TYPE, &val); + if (ret) + return ret; + + if (val < VADC_PERPH_TYPE_ADC) { + dev_err(vadc->dev, "%d is not ADC\n", val); + return -ENODEV; + } + + ret = vadc_read(vadc, VADC_PERPH_SUBTYPE, &val); + if (ret) + return ret; + + if (val < VADC_PERPH_SUBTYPE_VADC) { + dev_err(vadc->dev, "%d is not VADC\n", val); + return -ENODEV; + } + + ret = vadc_read(vadc, VADC_REVISION2, &val); + if (ret) + return ret; + + if (val < VADC_REVISION2_SUPPORTED_VADC) { + dev_err(vadc->dev, "revision %d not supported\n", val); + return -ENODEV; + } + + return 0; +} + +static int vadc_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct iio_dev *indio_dev; + struct vadc_priv *vadc; + struct regmap *regmap; + int ret, irq_eoc; + u32 reg; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENODEV; + + ret = of_property_read_u32(node, "reg", ®); + if (ret < 0) + return ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*vadc)); + if (!indio_dev) + return -ENOMEM; + + vadc = iio_priv(indio_dev); + vadc->regmap = regmap; + vadc->dev = dev; + vadc->base = reg; + vadc->are_ref_measured = false; + init_completion(&vadc->complete); + mutex_init(&vadc->lock); + + ret = vadc_check_revision(vadc); + if (ret) + return ret; + + ret = vadc_get_dt_data(vadc, node); + if (ret) + return ret; + + irq_eoc = platform_get_irq(pdev, 0); + if (irq_eoc < 0) { + if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL) + return irq_eoc; + vadc->poll_eoc = true; + } else { + ret = devm_request_irq(dev, irq_eoc, vadc_isr, 0, + "spmi-vadc", vadc); + if (ret) + return ret; + } + + ret = vadc_reset(vadc); + if (ret) { + dev_err(dev, "reset failed\n"); + return ret; + } + + ret = vadc_measure_ref_points(vadc); + if (ret) + return ret; + + indio_dev->dev.parent = dev; + indio_dev->dev.of_node = node; + indio_dev->name = pdev->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &vadc_info; + indio_dev->channels = vadc->iio_chans; + indio_dev->num_channels = vadc->nchannels; + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct of_device_id vadc_match_table[] = { + { .compatible = "qcom,spmi-vadc" }, + { } +}; +MODULE_DEVICE_TABLE(of, vadc_match_table); + +static struct platform_driver vadc_driver = { + .driver = { + .name = "qcom-spmi-vadc", + .of_match_table = vadc_match_table, + }, + .probe = vadc_probe, +}; +module_platform_driver(vadc_driver); + +MODULE_ALIAS("platform:qcom-spmi-vadc"); +MODULE_DESCRIPTION("Qualcomm SPMI PMIC voltage ADC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>"); +MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c index b730864731e8..2e5cc4409f78 100644 --- a/drivers/iio/adc/ti_am335x_adc.c +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -86,19 +86,18 @@ static void tiadc_step_config(struct iio_dev *indio_dev) { struct tiadc_device *adc_dev = iio_priv(indio_dev); unsigned int stepconfig; - int i, steps; + int i, steps = 0; /* * There are 16 configurable steps and 8 analog input * lines available which are shared between Touchscreen and ADC. * - * Steps backwards i.e. from 16 towards 0 are used by ADC + * Steps forwards i.e. from 0 towards 16 are used by ADC * depending on number of input lines needed. * Channel would represent which analog input * needs to be given to ADC to digitalize data. */ - steps = TOTAL_STEPS - adc_dev->channels; if (iio_buffer_enabled(indio_dev)) stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1 | STEPCONFIG_MODE_SWCNT; @@ -250,7 +249,7 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev, struct iio_buffer *buffer; int ret; - buffer = iio_kfifo_allocate(indio_dev); + buffer = iio_kfifo_allocate(); if (!buffer) return -ENOMEM; @@ -264,16 +263,8 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev, indio_dev->setup_ops = setup_ops; indio_dev->modes |= INDIO_BUFFER_HARDWARE; - ret = iio_buffer_register(indio_dev, - indio_dev->channels, - indio_dev->num_channels); - if (ret) - goto error_free_irq; - return 0; -error_free_irq: - free_irq(irq, indio_dev); error_kfifo_free: iio_kfifo_free(indio_dev->buffer); return ret; @@ -285,7 +276,6 @@ static void tiadc_iio_buffered_hardware_remove(struct iio_dev *indio_dev) free_irq(adc_dev->mfd_tscadc->irq, indio_dev); iio_kfifo_free(indio_dev->buffer); - iio_buffer_unregister(indio_dev); } diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index ba6f6a91dfff..c0d364ebaea8 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -31,7 +31,7 @@ struct ad8366_state { }; static int ad8366_write(struct iio_dev *indio_dev, - unsigned char ch_a, char unsigned ch_b) + unsigned char ch_a, unsigned char ch_b) { struct ad8366_state *st = iio_priv(indio_dev); int ret; @@ -166,7 +166,7 @@ static int ad8366_probe(struct spi_device *spi) if (ret) goto error_disable_reg; - ad8366_write(indio_dev, 0 , 0); + ad8366_write(indio_dev, 0, 0); return 0; diff --git a/drivers/iio/common/Kconfig b/drivers/iio/common/Kconfig index 0b6e97d18fa0..790f106d719c 100644 --- a/drivers/iio/common/Kconfig +++ b/drivers/iio/common/Kconfig @@ -3,4 +3,5 @@ # source "drivers/iio/common/hid-sensors/Kconfig" +source "drivers/iio/common/ssp_sensors/Kconfig" source "drivers/iio/common/st_sensors/Kconfig" diff --git a/drivers/iio/common/Makefile b/drivers/iio/common/Makefile index 3112df0060e9..b1e4d9c9591c 100644 --- a/drivers/iio/common/Makefile +++ b/drivers/iio/common/Makefile @@ -8,4 +8,5 @@ # When adding new entries keep the list in alphabetical order obj-y += hid-sensors/ +obj-y += ssp_sensors/ obj-y += st_sensors/ diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c index 910e82a7d06e..610fc98f88ef 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -22,16 +22,18 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> +#include <linux/delay.h> #include <linux/hid-sensor-hub.h> #include <linux/iio/iio.h> #include <linux/iio/trigger.h> #include <linux/iio/sysfs.h> #include "hid-sensor-trigger.h" -int hid_sensor_power_state(struct hid_sensor_common *st, bool state) +static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) { int state_val; int report_val; + s32 poll_value = 0; if (state) { if (sensor_hub_device_open(st->hsdev)) @@ -47,6 +49,8 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state) st->report_state.report_id, st->report_state.index, HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM); + + poll_value = hid_sensor_read_poll_value(st); } else { if (!atomic_dec_and_test(&st->data_ready)) return 0; @@ -79,10 +83,36 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state) sensor_hub_get_feature(st->hsdev, st->power_state.report_id, st->power_state.index, sizeof(state_val), &state_val); + if (state && poll_value) + msleep_interruptible(poll_value * 2); + return 0; } EXPORT_SYMBOL(hid_sensor_power_state); +int hid_sensor_power_state(struct hid_sensor_common *st, bool state) +{ +#ifdef CONFIG_PM + int ret; + + if (state) + ret = pm_runtime_get_sync(&st->pdev->dev); + else { + pm_runtime_mark_last_busy(&st->pdev->dev); + ret = pm_runtime_put_autosuspend(&st->pdev->dev); + } + if (ret < 0) { + if (state) + pm_runtime_put_noidle(&st->pdev->dev); + return ret; + } + + return 0; +#else + return _hid_sensor_power_state(st, state); +#endif +} + static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { @@ -126,8 +156,21 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, attrb->trigger = trig; indio_dev->trig = iio_trigger_get(trig); - return ret; + ret = pm_runtime_set_active(&indio_dev->dev); + if (ret) + goto error_unreg_trigger; + iio_device_set_drvdata(indio_dev, attrb); + pm_suspend_ignore_children(&attrb->pdev->dev, true); + pm_runtime_enable(&attrb->pdev->dev); + /* Default to 3 seconds, but can be changed from sysfs */ + pm_runtime_set_autosuspend_delay(&attrb->pdev->dev, + 3000); + pm_runtime_use_autosuspend(&attrb->pdev->dev); + + return ret; +error_unreg_trigger: + iio_trigger_unregister(trig); error_free_trig: iio_trigger_free(trig); error_ret: @@ -135,6 +178,34 @@ error_ret: } EXPORT_SYMBOL(hid_sensor_setup_trigger); +#ifdef CONFIG_PM +static int hid_sensor_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + + return _hid_sensor_power_state(attrb, false); +} + +static int hid_sensor_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + + return _hid_sensor_power_state(attrb, true); +} + +#endif + +const struct dev_pm_ops hid_sensor_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume) + SET_RUNTIME_PM_OPS(hid_sensor_suspend, + hid_sensor_resume, NULL) +}; +EXPORT_SYMBOL(hid_sensor_pm_ops); + MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); MODULE_DESCRIPTION("HID Sensor trigger processing"); MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h index 0f8e78c249d3..9f4713f42ecb 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h @@ -19,6 +19,11 @@ #ifndef _HID_SENSOR_TRIGGER_H #define _HID_SENSOR_TRIGGER_H +#include <linux/pm.h> +#include <linux/pm_runtime.h> + +extern const struct dev_pm_ops hid_sensor_pm_ops; + int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, struct hid_sensor_common *attrb); void hid_sensor_remove_trigger(struct hid_sensor_common *attrb); diff --git a/drivers/iio/common/ssp_sensors/Kconfig b/drivers/iio/common/ssp_sensors/Kconfig new file mode 100644 index 000000000000..0ea4faf016d8 --- /dev/null +++ b/drivers/iio/common/ssp_sensors/Kconfig @@ -0,0 +1,26 @@ +# +# SSP sensor drivers and commons configuration +# +menu "SSP Sensor Common" + +config IIO_SSP_SENSORS_COMMONS + tristate "Commons for all SSP Sensor IIO drivers" + depends on IIO_SSP_SENSORHUB + select IIO_BUFFER + select IIO_KFIFO_BUF + help + Say yes here to build commons for SSP sensors. + To compile this as a module, choose M here: the module + will be called ssp_iio. + +config IIO_SSP_SENSORHUB + tristate "Samsung Sensorhub driver" + depends on SPI + select MFD_CORE + help + SSP driver for sensorhub. + If you say yes here you get ssp support for sensorhub. + To compile this driver as a module, choose M here: the + module will be called sensorhub. + +endmenu diff --git a/drivers/iio/common/ssp_sensors/Makefile b/drivers/iio/common/ssp_sensors/Makefile new file mode 100644 index 000000000000..1e0389eb0905 --- /dev/null +++ b/drivers/iio/common/ssp_sensors/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for SSP sensor drivers and commons. +# + +sensorhub-objs := ssp_dev.o ssp_spi.o +obj-$(CONFIG_IIO_SSP_SENSORHUB) += sensorhub.o + +obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_iio.o diff --git a/drivers/iio/common/ssp_sensors/ssp.h b/drivers/iio/common/ssp_sensors/ssp.h new file mode 100644 index 000000000000..b910e91d7c0d --- /dev/null +++ b/drivers/iio/common/ssp_sensors/ssp.h @@ -0,0 +1,257 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __SSP_SENSORHUB_H__ +#define __SSP_SENSORHUB_H__ + +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/iio/common/ssp_sensors.h> +#include <linux/iio/iio.h> +#include <linux/spi/spi.h> + +#define SSP_DEVICE_ID 0x55 + +#ifdef SSP_DBG +#define ssp_dbg(format, ...) pr_info("[SSP] "format, ##__VA_ARGS__) +#else +#define ssp_dbg(format, ...) +#endif + +#define SSP_SW_RESET_TIME 3000 +/* Sensor polling in ms */ +#define SSP_DEFAULT_POLLING_DELAY 200 +#define SSP_DEFAULT_RETRIES 3 +#define SSP_DATA_PACKET_SIZE 960 +#define SSP_HEADER_BUFFER_SIZE 4 + +enum { + SSP_KERNEL_BINARY = 0, + SSP_KERNEL_CRASHED_BINARY, +}; + +enum { + SSP_INITIALIZATION_STATE = 0, + SSP_NO_SENSOR_STATE, + SSP_ADD_SENSOR_STATE, + SSP_RUNNING_SENSOR_STATE, +}; + +/* Firmware download STATE */ +enum { + SSP_FW_DL_STATE_FAIL = -1, + SSP_FW_DL_STATE_NONE = 0, + SSP_FW_DL_STATE_NEED_TO_SCHEDULE, + SSP_FW_DL_STATE_SCHEDULED, + SSP_FW_DL_STATE_DOWNLOADING, + SSP_FW_DL_STATE_SYNC, + SSP_FW_DL_STATE_DONE, +}; + +#define SSP_INVALID_REVISION 99999 +#define SSP_INVALID_REVISION2 0xffffff + +/* AP -> SSP Instruction */ +#define SSP_MSG2SSP_INST_BYPASS_SENSOR_ADD 0xa1 +#define SSP_MSG2SSP_INST_BYPASS_SENSOR_RM 0xa2 +#define SSP_MSG2SSP_INST_REMOVE_ALL 0xa3 +#define SSP_MSG2SSP_INST_CHANGE_DELAY 0xa4 +#define SSP_MSG2SSP_INST_LIBRARY_ADD 0xb1 +#define SSP_MSG2SSP_INST_LIBRARY_REMOVE 0xb2 +#define SSP_MSG2SSP_INST_LIB_NOTI 0xb4 +#define SSP_MSG2SSP_INST_LIB_DATA 0xc1 + +#define SSP_MSG2SSP_AP_MCU_SET_GYRO_CAL 0xcd +#define SSP_MSG2SSP_AP_MCU_SET_ACCEL_CAL 0xce +#define SSP_MSG2SSP_AP_STATUS_SHUTDOWN 0xd0 +#define SSP_MSG2SSP_AP_STATUS_WAKEUP 0xd1 +#define SSP_MSG2SSP_AP_STATUS_SLEEP 0xd2 +#define SSP_MSG2SSP_AP_STATUS_RESUME 0xd3 +#define SSP_MSG2SSP_AP_STATUS_SUSPEND 0xd4 +#define SSP_MSG2SSP_AP_STATUS_RESET 0xd5 +#define SSP_MSG2SSP_AP_STATUS_POW_CONNECTED 0xd6 +#define SSP_MSG2SSP_AP_STATUS_POW_DISCONNECTED 0xd7 +#define SSP_MSG2SSP_AP_TEMPHUMIDITY_CAL_DONE 0xda +#define SSP_MSG2SSP_AP_MCU_SET_DUMPMODE 0xdb +#define SSP_MSG2SSP_AP_MCU_DUMP_CHECK 0xdc +#define SSP_MSG2SSP_AP_MCU_BATCH_FLUSH 0xdd +#define SSP_MSG2SSP_AP_MCU_BATCH_COUNT 0xdf + +#define SSP_MSG2SSP_AP_WHOAMI 0x0f +#define SSP_MSG2SSP_AP_FIRMWARE_REV 0xf0 +#define SSP_MSG2SSP_AP_SENSOR_FORMATION 0xf1 +#define SSP_MSG2SSP_AP_SENSOR_PROXTHRESHOLD 0xf2 +#define SSP_MSG2SSP_AP_SENSOR_BARCODE_EMUL 0xf3 +#define SSP_MSG2SSP_AP_SENSOR_SCANNING 0xf4 +#define SSP_MSG2SSP_AP_SET_MAGNETIC_HWOFFSET 0xf5 +#define SSP_MSG2SSP_AP_GET_MAGNETIC_HWOFFSET 0xf6 +#define SSP_MSG2SSP_AP_SENSOR_GESTURE_CURRENT 0xf7 +#define SSP_MSG2SSP_AP_GET_THERM 0xf8 +#define SSP_MSG2SSP_AP_GET_BIG_DATA 0xf9 +#define SSP_MSG2SSP_AP_SET_BIG_DATA 0xfa +#define SSP_MSG2SSP_AP_START_BIG_DATA 0xfb +#define SSP_MSG2SSP_AP_SET_MAGNETIC_STATIC_MATRIX 0xfd +#define SSP_MSG2SSP_AP_SENSOR_TILT 0xea +#define SSP_MSG2SSP_AP_MCU_SET_TIME 0xfe +#define SSP_MSG2SSP_AP_MCU_GET_TIME 0xff + +#define SSP_MSG2SSP_AP_FUSEROM 0x01 + +/* voice data */ +#define SSP_TYPE_WAKE_UP_VOICE_SERVICE 0x01 +#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_AM 0x01 +#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_GRAMMER 0x02 + +/* Factory Test */ +#define SSP_ACCELEROMETER_FACTORY 0x80 +#define SSP_GYROSCOPE_FACTORY 0x81 +#define SSP_GEOMAGNETIC_FACTORY 0x82 +#define SSP_PRESSURE_FACTORY 0x85 +#define SSP_GESTURE_FACTORY 0x86 +#define SSP_TEMPHUMIDITY_CRC_FACTORY 0x88 +#define SSP_GYROSCOPE_TEMP_FACTORY 0x8a +#define SSP_GYROSCOPE_DPS_FACTORY 0x8b +#define SSP_MCU_FACTORY 0x8c +#define SSP_MCU_SLEEP_FACTORY 0x8d + +/* SSP -> AP ACK about write CMD */ +#define SSP_MSG_ACK 0x80 /* ACK from SSP to AP */ +#define SSP_MSG_NAK 0x70 /* NAK from SSP to AP */ + +struct ssp_sensorhub_info { + char *fw_name; + char *fw_crashed_name; + unsigned int fw_rev; + const u8 * const mag_table; + const unsigned int mag_length; +}; + +/* ssp_msg options bit */ +#define SSP_RW 0 +#define SSP_INDEX 3 + +#define SSP_AP2HUB_READ 0 +#define SSP_AP2HUB_WRITE 1 +#define SSP_HUB2AP_WRITE 2 +#define SSP_AP2HUB_READY 3 +#define SSP_AP2HUB_RETURN 4 + +/** + * struct ssp_data - ssp platformdata structure + * @spi: spi device + * @sensorhub_info: info about sensorhub board specific features + * @wdt_timer: watchdog timer + * @work_wdt: watchdog work + * @work_firmware: firmware upgrade work queue + * @work_refresh: refresh work queue for reset request from MCU + * @shut_down: shut down flag + * @mcu_dump_mode: mcu dump mode for debug + * @time_syncing: time syncing indication flag + * @timestamp: previous time in ns calculated for time syncing + * @check_status: status table for each sensor + * @com_fail_cnt: communication fail count + * @reset_cnt: reset count + * @timeout_cnt: timeout count + * @available_sensors: available sensors seen by sensorhub (bit array) + * @cur_firm_rev: cached current firmware revision + * @last_resume_state: last AP resume/suspend state used to handle the PM + * state of ssp + * @last_ap_state: (obsolete) sleep notification for MCU + * @sensor_enable: sensor enable mask + * @delay_buf: data acquisition intervals table + * @batch_latency_buf: yet unknown but existing in communication protocol + * @batch_opt_buf: yet unknown but existing in communication protocol + * @accel_position: yet unknown but existing in communication protocol + * @mag_position: yet unknown but existing in communication protocol + * @fw_dl_state: firmware download state + * @comm_lock: lock protecting the handshake + * @pending_lock: lock protecting pending list and completion + * @mcu_reset_gpio: mcu reset line + * @ap_mcu_gpio: ap to mcu gpio line + * @mcu_ap_gpio: mcu to ap gpio line + * @pending_list: pending list for messages queued to be sent/read + * @sensor_devs: registered IIO devices table + * @enable_refcount: enable reference count for wdt (watchdog timer) + * @header_buffer: cache aligned buffer for packet header + */ +struct ssp_data { + struct spi_device *spi; + struct ssp_sensorhub_info *sensorhub_info; + struct timer_list wdt_timer; + struct work_struct work_wdt; + struct delayed_work work_refresh; + + bool shut_down; + bool mcu_dump_mode; + bool time_syncing; + int64_t timestamp; + + int check_status[SSP_SENSOR_MAX]; + + unsigned int com_fail_cnt; + unsigned int reset_cnt; + unsigned int timeout_cnt; + + unsigned int available_sensors; + unsigned int cur_firm_rev; + + char last_resume_state; + char last_ap_state; + + unsigned int sensor_enable; + u32 delay_buf[SSP_SENSOR_MAX]; + s32 batch_latency_buf[SSP_SENSOR_MAX]; + s8 batch_opt_buf[SSP_SENSOR_MAX]; + + int accel_position; + int mag_position; + int fw_dl_state; + + struct mutex comm_lock; + struct mutex pending_lock; + + int mcu_reset_gpio; + int ap_mcu_gpio; + int mcu_ap_gpio; + + struct list_head pending_list; + + struct iio_dev *sensor_devs[SSP_SENSOR_MAX]; + atomic_t enable_refcount; + + __le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)] + ____cacheline_aligned; +}; + +void ssp_clean_pending_list(struct ssp_data *data); + +int ssp_command(struct ssp_data *data, char command, int arg); + +int ssp_send_instruction(struct ssp_data *data, u8 inst, u8 sensor_type, + u8 *send_buf, u8 length); + +int ssp_irq_msg(struct ssp_data *data); + +int ssp_get_chipid(struct ssp_data *data); + +int ssp_set_magnetic_matrix(struct ssp_data *data); + +unsigned int ssp_get_sensor_scanning_info(struct ssp_data *data); + +unsigned int ssp_get_firmware_rev(struct ssp_data *data); + +int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay); + +#endif /* __SSP_SENSORHUB_H__ */ diff --git a/drivers/iio/common/ssp_sensors/ssp_dev.c b/drivers/iio/common/ssp_sensors/ssp_dev.c new file mode 100644 index 000000000000..52d70435f5a1 --- /dev/null +++ b/drivers/iio/common/ssp_sensors/ssp_dev.c @@ -0,0 +1,712 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/iio.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/of_platform.h> +#include "ssp.h" + +#define SSP_WDT_TIME 10000 +#define SSP_LIMIT_RESET_CNT 20 +#define SSP_LIMIT_TIMEOUT_CNT 3 + +/* It is possible that it is max clk rate for version 1.0 of bootcode */ +#define SSP_BOOT_SPI_HZ 400000 + +/* + * These fields can look enigmatic but this structure is used mainly to flat + * some values and depends on command type. + */ +struct ssp_instruction { + __le32 a; + __le32 b; + u8 c; +} __attribute__((__packed__)); + +static const u8 ssp_magnitude_table[] = {110, 85, 171, 71, 203, 195, 0, 67, + 208, 56, 175, 244, 206, 213, 0, 92, 250, 0, 55, 48, 189, 252, 171, + 243, 13, 45, 250}; + +static const struct ssp_sensorhub_info ssp_rinato_info = { + .fw_name = "ssp_B2.fw", + .fw_crashed_name = "ssp_crashed.fw", + .fw_rev = 14052300, + .mag_table = ssp_magnitude_table, + .mag_length = ARRAY_SIZE(ssp_magnitude_table), +}; + +static const struct ssp_sensorhub_info ssp_thermostat_info = { + .fw_name = "thermostat_B2.fw", + .fw_crashed_name = "ssp_crashed.fw", + .fw_rev = 14080600, + .mag_table = ssp_magnitude_table, + .mag_length = ARRAY_SIZE(ssp_magnitude_table), +}; + +static const struct mfd_cell sensorhub_sensor_devs[] = { + { + .name = "ssp-accelerometer", + }, + { + .name = "ssp-gyroscope", + }, +}; + +static void ssp_toggle_mcu_reset_gpio(struct ssp_data *data) +{ + gpio_set_value(data->mcu_reset_gpio, 0); + usleep_range(1000, 1200); + gpio_set_value(data->mcu_reset_gpio, 1); + msleep(50); +} + +static void ssp_sync_available_sensors(struct ssp_data *data) +{ + int i, ret; + + for (i = 0; i < SSP_SENSOR_MAX; ++i) { + if (data->available_sensors & BIT(i)) { + ret = ssp_enable_sensor(data, i, data->delay_buf[i]); + if (ret < 0) { + dev_err(&data->spi->dev, + "Sync sensor nr: %d fail\n", i); + continue; + } + } + } + + ret = ssp_command(data, SSP_MSG2SSP_AP_MCU_SET_DUMPMODE, + data->mcu_dump_mode); + if (ret < 0) + dev_err(&data->spi->dev, + "SSP_MSG2SSP_AP_MCU_SET_DUMPMODE failed\n"); +} + +static void ssp_enable_mcu(struct ssp_data *data, bool enable) +{ + dev_info(&data->spi->dev, "current shutdown = %d, old = %d\n", enable, + data->shut_down); + + if (enable && data->shut_down) { + data->shut_down = false; + enable_irq(data->spi->irq); + enable_irq_wake(data->spi->irq); + } else if (!enable && !data->shut_down) { + data->shut_down = true; + disable_irq(data->spi->irq); + disable_irq_wake(data->spi->irq); + } else { + dev_warn(&data->spi->dev, "current shutdown = %d, old = %d\n", + enable, data->shut_down); + } +} + +/* + * This function is the first one which communicates with the mcu so it is + * possible that the first attempt will fail + */ +static int ssp_check_fwbl(struct ssp_data *data) +{ + int retries = 0; + + while (retries++ < 5) { + data->cur_firm_rev = ssp_get_firmware_rev(data); + if (data->cur_firm_rev == SSP_INVALID_REVISION || + data->cur_firm_rev == SSP_INVALID_REVISION2) { + dev_warn(&data->spi->dev, + "Invalid revision, trying %d time\n", retries); + } else { + break; + } + } + + if (data->cur_firm_rev == SSP_INVALID_REVISION || + data->cur_firm_rev == SSP_INVALID_REVISION2) { + dev_err(&data->spi->dev, "SSP_INVALID_REVISION\n"); + return SSP_FW_DL_STATE_NEED_TO_SCHEDULE; + } + + dev_info(&data->spi->dev, + "MCU Firm Rev : Old = %8u, New = %8u\n", + data->cur_firm_rev, + data->sensorhub_info->fw_rev); + + if (data->cur_firm_rev != data->sensorhub_info->fw_rev) + return SSP_FW_DL_STATE_NEED_TO_SCHEDULE; + + return SSP_FW_DL_STATE_NONE; +} + +static void ssp_reset_mcu(struct ssp_data *data) +{ + ssp_enable_mcu(data, false); + ssp_clean_pending_list(data); + ssp_toggle_mcu_reset_gpio(data); + ssp_enable_mcu(data, true); +} + +static void ssp_wdt_work_func(struct work_struct *work) +{ + struct ssp_data *data = container_of(work, struct ssp_data, work_wdt); + + dev_err(&data->spi->dev, "%s - Sensor state: 0x%x, RC: %u, CC: %u\n", + __func__, data->available_sensors, data->reset_cnt, + data->com_fail_cnt); + + ssp_reset_mcu(data); + data->com_fail_cnt = 0; + data->timeout_cnt = 0; +} + +static void ssp_wdt_timer_func(unsigned long ptr) +{ + struct ssp_data *data = (struct ssp_data *)ptr; + + switch (data->fw_dl_state) { + case SSP_FW_DL_STATE_FAIL: + case SSP_FW_DL_STATE_DOWNLOADING: + case SSP_FW_DL_STATE_SYNC: + goto _mod; + } + + if (data->timeout_cnt > SSP_LIMIT_TIMEOUT_CNT || + data->com_fail_cnt > SSP_LIMIT_RESET_CNT) + queue_work(system_power_efficient_wq, &data->work_wdt); +_mod: + mod_timer(&data->wdt_timer, jiffies + msecs_to_jiffies(SSP_WDT_TIME)); +} + +static void ssp_enable_wdt_timer(struct ssp_data *data) +{ + mod_timer(&data->wdt_timer, jiffies + msecs_to_jiffies(SSP_WDT_TIME)); +} + +static void ssp_disable_wdt_timer(struct ssp_data *data) +{ + del_timer_sync(&data->wdt_timer); + cancel_work_sync(&data->work_wdt); +} + +/** + * ssp_get_sensor_delay() - gets sensor data acquisition period + * @data: sensorhub structure + * @type: SSP sensor type + * + * Returns acquisition period in ms + */ +u32 ssp_get_sensor_delay(struct ssp_data *data, enum ssp_sensor_type type) +{ + return data->delay_buf[type]; +} +EXPORT_SYMBOL(ssp_get_sensor_delay); + +/** + * ssp_enable_sensor() - enables data acquisition for sensor + * @data: sensorhub structure + * @type: SSP sensor type + * @delay: delay in ms + * + * Returns 0 or negative value in case of error + */ +int ssp_enable_sensor(struct ssp_data *data, enum ssp_sensor_type type, + u32 delay) +{ + int ret; + struct ssp_instruction to_send; + + to_send.a = cpu_to_le32(delay); + to_send.b = cpu_to_le32(data->batch_latency_buf[type]); + to_send.c = data->batch_opt_buf[type]; + + switch (data->check_status[type]) { + case SSP_INITIALIZATION_STATE: + /* do calibration step, now just enable */ + case SSP_ADD_SENSOR_STATE: + ret = ssp_send_instruction(data, + SSP_MSG2SSP_INST_BYPASS_SENSOR_ADD, + type, + (u8 *)&to_send, sizeof(to_send)); + if (ret < 0) { + dev_err(&data->spi->dev, "Enabling sensor failed\n"); + data->check_status[type] = SSP_NO_SENSOR_STATE; + goto derror; + } + + data->sensor_enable |= BIT(type); + data->check_status[type] = SSP_RUNNING_SENSOR_STATE; + break; + case SSP_RUNNING_SENSOR_STATE: + ret = ssp_send_instruction(data, + SSP_MSG2SSP_INST_CHANGE_DELAY, type, + (u8 *)&to_send, sizeof(to_send)); + if (ret < 0) { + dev_err(&data->spi->dev, + "Changing sensor delay failed\n"); + goto derror; + } + break; + default: + data->check_status[type] = SSP_ADD_SENSOR_STATE; + break; + } + + data->delay_buf[type] = delay; + + if (atomic_inc_return(&data->enable_refcount) == 1) + ssp_enable_wdt_timer(data); + + return 0; + +derror: + return ret; +} +EXPORT_SYMBOL(ssp_enable_sensor); + +/** + * ssp_change_delay() - changes data acquisition for sensor + * @data: sensorhub structure + * @type: SSP sensor type + * @delay: delay in ms + * + * Returns 0 or negative value in case of error + */ +int ssp_change_delay(struct ssp_data *data, enum ssp_sensor_type type, + u32 delay) +{ + int ret; + struct ssp_instruction to_send; + + to_send.a = cpu_to_le32(delay); + to_send.b = cpu_to_le32(data->batch_latency_buf[type]); + to_send.c = data->batch_opt_buf[type]; + + ret = ssp_send_instruction(data, SSP_MSG2SSP_INST_CHANGE_DELAY, type, + (u8 *)&to_send, sizeof(to_send)); + if (ret < 0) { + dev_err(&data->spi->dev, "Changing sensor delay failed\n"); + return ret; + } + + data->delay_buf[type] = delay; + + return 0; +} +EXPORT_SYMBOL(ssp_change_delay); + +/** + * ssp_disable_sensor() - disables sensor + * + * @data: sensorhub structure + * @type: SSP sensor type + * + * Returns 0 or negative value in case of error + */ +int ssp_disable_sensor(struct ssp_data *data, enum ssp_sensor_type type) +{ + int ret; + __le32 command; + + if (data->sensor_enable & BIT(type)) { + command = cpu_to_le32(data->delay_buf[type]); + + ret = ssp_send_instruction(data, + SSP_MSG2SSP_INST_BYPASS_SENSOR_RM, + type, (u8 *)&command, + sizeof(command)); + if (ret < 0) { + dev_err(&data->spi->dev, "Remove sensor fail\n"); + return ret; + } + + data->sensor_enable &= ~BIT(type); + } + + data->check_status[type] = SSP_ADD_SENSOR_STATE; + + if (atomic_dec_and_test(&data->enable_refcount)) + ssp_disable_wdt_timer(data); + + return 0; +} +EXPORT_SYMBOL(ssp_disable_sensor); + +static irqreturn_t ssp_irq_thread_fn(int irq, void *dev_id) +{ + struct ssp_data *data = dev_id; + + /* + * This wrapper is done to preserve error path for ssp_irq_msg, also + * it is defined in different file. + */ + ssp_irq_msg(data); + + return IRQ_HANDLED; +} + +static int ssp_initialize_mcu(struct ssp_data *data) +{ + int ret; + + ssp_clean_pending_list(data); + + ret = ssp_get_chipid(data); + if (ret != SSP_DEVICE_ID) { + dev_err(&data->spi->dev, "%s - MCU %s ret = %d\n", __func__, + ret < 0 ? "is not working" : "identification failed", + ret); + return ret < 0 ? ret : -ENODEV; + } + + dev_info(&data->spi->dev, "MCU device ID = %d\n", ret); + + /* + * needs clarification, for now do not want to export all transfer + * methods to sensors' drivers + */ + ret = ssp_set_magnetic_matrix(data); + if (ret < 0) { + dev_err(&data->spi->dev, + "%s - ssp_set_magnetic_matrix failed\n", __func__); + return ret; + } + + data->available_sensors = ssp_get_sensor_scanning_info(data); + if (data->available_sensors == 0) { + dev_err(&data->spi->dev, + "%s - ssp_get_sensor_scanning_info failed\n", __func__); + return -EIO; + } + + data->cur_firm_rev = ssp_get_firmware_rev(data); + dev_info(&data->spi->dev, "MCU Firm Rev : New = %8u\n", + data->cur_firm_rev); + + return ssp_command(data, SSP_MSG2SSP_AP_MCU_DUMP_CHECK, 0); +} + +/* + * sensorhub can request its reinitialization as some brutal and rare error + * handling. It can be requested from the MCU. + */ +static void ssp_refresh_task(struct work_struct *work) +{ + struct ssp_data *data = container_of((struct delayed_work *)work, + struct ssp_data, work_refresh); + + dev_info(&data->spi->dev, "refreshing\n"); + + data->reset_cnt++; + + if (ssp_initialize_mcu(data) >= 0) { + ssp_sync_available_sensors(data); + if (data->last_ap_state != 0) + ssp_command(data, data->last_ap_state, 0); + + if (data->last_resume_state != 0) + ssp_command(data, data->last_resume_state, 0); + + data->timeout_cnt = 0; + data->com_fail_cnt = 0; + } +} + +int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay) +{ + cancel_delayed_work_sync(&data->work_refresh); + + return queue_delayed_work(system_power_efficient_wq, + &data->work_refresh, + msecs_to_jiffies(delay)); +} + +#ifdef CONFIG_OF +static struct of_device_id ssp_of_match[] = { + { + .compatible = "samsung,sensorhub-rinato", + .data = &ssp_rinato_info, + }, { + .compatible = "samsung,sensorhub-thermostat", + .data = &ssp_thermostat_info, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ssp_of_match); + +static struct ssp_data *ssp_parse_dt(struct device *dev) +{ + int ret; + struct ssp_data *data; + struct device_node *node = dev->of_node; + const struct of_device_id *match; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return NULL; + + data->mcu_ap_gpio = of_get_named_gpio(node, "mcu-ap-gpios", 0); + if (data->mcu_ap_gpio < 0) + goto err_free_pd; + + data->ap_mcu_gpio = of_get_named_gpio(node, "ap-mcu-gpios", 0); + if (data->ap_mcu_gpio < 0) + goto err_free_pd; + + data->mcu_reset_gpio = of_get_named_gpio(node, "mcu-reset-gpios", 0); + if (data->mcu_reset_gpio < 0) + goto err_free_pd; + + ret = devm_gpio_request_one(dev, data->ap_mcu_gpio, GPIOF_OUT_INIT_HIGH, + "ap-mcu-gpios"); + if (ret) + goto err_free_pd; + + ret = devm_gpio_request_one(dev, data->mcu_reset_gpio, + GPIOF_OUT_INIT_HIGH, "mcu-reset-gpios"); + if (ret) + goto err_ap_mcu; + + match = of_match_node(ssp_of_match, node); + if (!match) + goto err_mcu_reset_gpio; + + data->sensorhub_info = (struct ssp_sensorhub_info *)match->data; + + dev_set_drvdata(dev, data); + + return data; + +err_mcu_reset_gpio: + devm_gpio_free(dev, data->mcu_reset_gpio); +err_ap_mcu: + devm_gpio_free(dev, data->ap_mcu_gpio); +err_free_pd: + devm_kfree(dev, data); + return NULL; +} +#else +static struct ssp_data *ssp_parse_dt(struct device *pdev) +{ + return NULL; +} +#endif + +/** + * ssp_register_consumer() - registers iio consumer in ssp framework + * + * @indio_dev: consumer iio device + * @type: ssp sensor type + */ +void ssp_register_consumer(struct iio_dev *indio_dev, enum ssp_sensor_type type) +{ + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + data->sensor_devs[type] = indio_dev; +} +EXPORT_SYMBOL(ssp_register_consumer); + +static int ssp_probe(struct spi_device *spi) +{ + int ret, i; + struct ssp_data *data; + + data = ssp_parse_dt(&spi->dev); + if (!data) { + dev_err(&spi->dev, "Failed to find platform data\n"); + return -ENODEV; + } + + ret = mfd_add_devices(&spi->dev, -1, sensorhub_sensor_devs, + ARRAY_SIZE(sensorhub_sensor_devs), NULL, 0, NULL); + if (ret < 0) { + dev_err(&spi->dev, "mfd add devices fail\n"); + return ret; + } + + spi->mode = SPI_MODE_1; + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "Failed to setup spi\n"); + return ret; + } + + data->fw_dl_state = SSP_FW_DL_STATE_NONE; + data->spi = spi; + spi_set_drvdata(spi, data); + + mutex_init(&data->comm_lock); + + for (i = 0; i < SSP_SENSOR_MAX; ++i) { + data->delay_buf[i] = SSP_DEFAULT_POLLING_DELAY; + data->batch_latency_buf[i] = 0; + data->batch_opt_buf[i] = 0; + data->check_status[i] = SSP_INITIALIZATION_STATE; + } + + data->delay_buf[SSP_BIO_HRM_LIB] = 100; + + data->time_syncing = true; + + mutex_init(&data->pending_lock); + INIT_LIST_HEAD(&data->pending_list); + + atomic_set(&data->enable_refcount, 0); + + INIT_WORK(&data->work_wdt, ssp_wdt_work_func); + INIT_DELAYED_WORK(&data->work_refresh, ssp_refresh_task); + + setup_timer(&data->wdt_timer, ssp_wdt_timer_func, (unsigned long)data); + + ret = request_threaded_irq(data->spi->irq, NULL, + ssp_irq_thread_fn, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "SSP_Int", data); + if (ret < 0) { + dev_err(&spi->dev, "Irq request fail\n"); + goto err_setup_irq; + } + + /* Let's start with enabled one so irq balance could be ok */ + data->shut_down = false; + + /* just to avoid unbalanced irq set wake up */ + enable_irq_wake(data->spi->irq); + + data->fw_dl_state = ssp_check_fwbl(data); + if (data->fw_dl_state == SSP_FW_DL_STATE_NONE) { + ret = ssp_initialize_mcu(data); + if (ret < 0) { + dev_err(&spi->dev, "Initialize_mcu failed\n"); + goto err_read_reg; + } + } else { + dev_err(&spi->dev, "Firmware version not supported\n"); + ret = -EPERM; + goto err_read_reg; + } + + return 0; + +err_read_reg: + free_irq(data->spi->irq, data); +err_setup_irq: + mutex_destroy(&data->pending_lock); + mutex_destroy(&data->comm_lock); + + dev_err(&spi->dev, "Probe failed!\n"); + + return ret; +} + +static int ssp_remove(struct spi_device *spi) +{ + struct ssp_data *data = spi_get_drvdata(spi); + + if (ssp_command(data, SSP_MSG2SSP_AP_STATUS_SHUTDOWN, 0) < 0) + dev_err(&data->spi->dev, + "SSP_MSG2SSP_AP_STATUS_SHUTDOWN failed\n"); + + ssp_enable_mcu(data, false); + ssp_disable_wdt_timer(data); + + ssp_clean_pending_list(data); + + free_irq(data->spi->irq, data); + + del_timer_sync(&data->wdt_timer); + cancel_work_sync(&data->work_wdt); + + mutex_destroy(&data->comm_lock); + mutex_destroy(&data->pending_lock); + + mfd_remove_devices(&spi->dev); + + return 0; +} + +static int ssp_suspend(struct device *dev) +{ + int ret; + struct ssp_data *data = spi_get_drvdata(to_spi_device(dev)); + + data->last_resume_state = SSP_MSG2SSP_AP_STATUS_SUSPEND; + + if (atomic_read(&data->enable_refcount) > 0) + ssp_disable_wdt_timer(data); + + ret = ssp_command(data, SSP_MSG2SSP_AP_STATUS_SUSPEND, 0); + if (ret < 0) { + dev_err(&data->spi->dev, + "%s SSP_MSG2SSP_AP_STATUS_SUSPEND failed\n", __func__); + + ssp_enable_wdt_timer(data); + return ret; + } + + data->time_syncing = false; + disable_irq(data->spi->irq); + + return 0; +} + +static int ssp_resume(struct device *dev) +{ + int ret; + struct ssp_data *data = spi_get_drvdata(to_spi_device(dev)); + + enable_irq(data->spi->irq); + + if (atomic_read(&data->enable_refcount) > 0) + ssp_enable_wdt_timer(data); + + ret = ssp_command(data, SSP_MSG2SSP_AP_STATUS_RESUME, 0); + if (ret < 0) { + dev_err(&data->spi->dev, + "%s SSP_MSG2SSP_AP_STATUS_RESUME failed\n", __func__); + ssp_disable_wdt_timer(data); + return ret; + } + + /* timesyncing is set by MCU */ + data->last_resume_state = SSP_MSG2SSP_AP_STATUS_RESUME; + + return 0; +} + +static const struct dev_pm_ops ssp_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ssp_suspend, ssp_resume) +}; + +static struct spi_driver ssp_driver = { + .probe = ssp_probe, + .remove = ssp_remove, + .driver = { + .pm = &ssp_pm_ops, + .bus = &spi_bus_type, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(ssp_of_match), + .name = "sensorhub" + }, +}; + +module_spi_driver(ssp_driver); + +MODULE_DESCRIPTION("ssp sensorhub driver"); +MODULE_AUTHOR("Samsung Electronics"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/ssp_sensors/ssp_iio.c b/drivers/iio/common/ssp_sensors/ssp_iio.c new file mode 100644 index 000000000000..a3ae165f8d9f --- /dev/null +++ b/drivers/iio/common/ssp_sensors/ssp_iio.c @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/common/ssp_sensors.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/module.h> +#include <linux/slab.h> +#include "ssp_iio_sensor.h" + +/** + * ssp_common_buffer_postenable() - generic postenable callback for ssp buffer + * + * @indio_dev: iio device + * + * Returns 0 or negative value in case of error + */ +int ssp_common_buffer_postenable(struct iio_dev *indio_dev) +{ + struct ssp_sensor_data *spd = iio_priv(indio_dev); + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + /* the allocation is made in post because scan size is known in this + * moment + * */ + spd->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL | GFP_DMA); + if (!spd->buffer) + return -ENOMEM; + + return ssp_enable_sensor(data, spd->type, + ssp_get_sensor_delay(data, spd->type)); +} +EXPORT_SYMBOL(ssp_common_buffer_postenable); + +/** + * ssp_common_buffer_postdisable() - generic postdisable callback for ssp buffer + * + * @indio_dev: iio device + * + * Returns 0 or negative value in case of error + */ +int ssp_common_buffer_postdisable(struct iio_dev *indio_dev) +{ + int ret; + struct ssp_sensor_data *spd = iio_priv(indio_dev); + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + ret = ssp_disable_sensor(data, spd->type); + if (ret < 0) + return ret; + + kfree(spd->buffer); + + return ret; +} +EXPORT_SYMBOL(ssp_common_buffer_postdisable); + +/** + * ssp_common_process_data() - Common process data callback for ssp sensors + * + * @indio_dev: iio device + * @buf: source buffer + * @len: sensor data length + * @timestamp: system timestamp + * + * Returns 0 or negative value in case of error + */ +int ssp_common_process_data(struct iio_dev *indio_dev, void *buf, + unsigned int len, int64_t timestamp) +{ + __le32 time; + int64_t calculated_time; + struct ssp_sensor_data *spd = iio_priv(indio_dev); + + if (indio_dev->scan_bytes == 0) + return 0; + + /* + * it always sends full set of samples, remember about available masks + */ + memcpy(spd->buffer, buf, len); + + if (indio_dev->scan_timestamp) { + memcpy(&time, &((char *)buf)[len], SSP_TIME_SIZE); + calculated_time = + timestamp + (int64_t)le32_to_cpu(time) * 1000000; + } + + return iio_push_to_buffers_with_timestamp(indio_dev, spd->buffer, + calculated_time); +} +EXPORT_SYMBOL(ssp_common_process_data); + +MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); +MODULE_DESCRIPTION("Samsung sensorhub commons"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h b/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h new file mode 100644 index 000000000000..541c6590d69c --- /dev/null +++ b/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h @@ -0,0 +1,71 @@ +#ifndef __SSP_IIO_SENSOR_H__ +#define __SSP_IIO_SENSOR_H__ + +#define SSP_CHANNEL_AG(_type, _mod, _index) \ +{ \ + .type = _type,\ + .modified = 1,\ + .channel2 = _mod,\ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),\ + .scan_index = _index,\ + .scan_type = {\ + .sign = 's',\ + .realbits = 16,\ + .storagebits = 16,\ + .shift = 0,\ + .endianness = IIO_LE,\ + },\ +} + +/* It is defined here as it is a mixed timestamp */ +#define SSP_CHAN_TIMESTAMP(_si) { \ + .type = IIO_TIMESTAMP, \ + .channel = -1, \ + .scan_index = _si, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 64, \ + .storagebits = 64, \ + }, \ +} + +#define SSP_MS_PER_S 1000 +#define SSP_INVERTED_SCALING_FACTOR 1000000U + +#define SSP_FACTOR_WITH_MS \ + (SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S) + +int ssp_common_buffer_postenable(struct iio_dev *indio_dev); + +int ssp_common_buffer_postdisable(struct iio_dev *indio_dev); + +int ssp_common_process_data(struct iio_dev *indio_dev, void *buf, + unsigned int len, int64_t timestamp); + +/* Converts time in ms to frequency */ +static inline void ssp_convert_to_freq(u32 time, int *integer_part, + int *fractional) +{ + if (time == 0) { + *fractional = 0; + *integer_part = 0; + return; + } + + *integer_part = SSP_FACTOR_WITH_MS / time; + *fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR; + *integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR; +} + +/* Converts frequency to time in ms */ +static inline int ssp_convert_to_time(int integer_part, int fractional) +{ + u64 value; + + value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional; + if (value == 0) + return 0; + + return div64_u64((u64)SSP_FACTOR_WITH_MS, value); +} +#endif /* __SSP_IIO_SENSOR_H__ */ diff --git a/drivers/iio/common/ssp_sensors/ssp_spi.c b/drivers/iio/common/ssp_sensors/ssp_spi.c new file mode 100644 index 000000000000..704284a475ae --- /dev/null +++ b/drivers/iio/common/ssp_sensors/ssp_spi.c @@ -0,0 +1,608 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include "ssp.h" + +#define SSP_DEV (&data->spi->dev) +#define SSP_GET_MESSAGE_TYPE(data) (data & (3 << SSP_RW)) + +/* + * SSP -> AP Instruction + * They tell what packet type can be expected. In the future there will + * be less of them. BYPASS means common sensor packets with accel, gyro, + * hrm etc. data. LIBRARY and META are mock-up's for now. + */ +#define SSP_MSG2AP_INST_BYPASS_DATA 0x37 +#define SSP_MSG2AP_INST_LIBRARY_DATA 0x01 +#define SSP_MSG2AP_INST_DEBUG_DATA 0x03 +#define SSP_MSG2AP_INST_BIG_DATA 0x04 +#define SSP_MSG2AP_INST_META_DATA 0x05 +#define SSP_MSG2AP_INST_TIME_SYNC 0x06 +#define SSP_MSG2AP_INST_RESET 0x07 + +#define SSP_UNIMPLEMENTED -1 + +struct ssp_msg_header { + u8 cmd; + __le16 length; + __le16 options; + __le32 data; +} __attribute__((__packed__)); + +struct ssp_msg { + u16 length; + u16 options; + struct list_head list; + struct completion *done; + struct ssp_msg_header *h; + char *buffer; +}; + +static const int ssp_offset_map[SSP_SENSOR_MAX] = { + [SSP_ACCELEROMETER_SENSOR] = SSP_ACCELEROMETER_SIZE + + SSP_TIME_SIZE, + [SSP_GYROSCOPE_SENSOR] = SSP_GYROSCOPE_SIZE + + SSP_TIME_SIZE, + [SSP_GEOMAGNETIC_UNCALIB_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_GEOMAGNETIC_RAW] = SSP_UNIMPLEMENTED, + [SSP_GEOMAGNETIC_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_PRESSURE_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_GESTURE_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_PROXIMITY_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_TEMPERATURE_HUMIDITY_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_LIGHT_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_PROXIMITY_RAW] = SSP_UNIMPLEMENTED, + [SSP_ORIENTATION_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_STEP_DETECTOR] = SSP_UNIMPLEMENTED, + [SSP_SIG_MOTION_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_GYRO_UNCALIB_SENSOR] = SSP_UNIMPLEMENTED, + [SSP_GAME_ROTATION_VECTOR] = SSP_UNIMPLEMENTED, + [SSP_ROTATION_VECTOR] = SSP_UNIMPLEMENTED, + [SSP_STEP_COUNTER] = SSP_UNIMPLEMENTED, + [SSP_BIO_HRM_RAW] = SSP_BIO_HRM_RAW_SIZE + + SSP_TIME_SIZE, + [SSP_BIO_HRM_RAW_FAC] = SSP_BIO_HRM_RAW_FAC_SIZE + + SSP_TIME_SIZE, + [SSP_BIO_HRM_LIB] = SSP_BIO_HRM_LIB_SIZE + + SSP_TIME_SIZE, +}; + +#define SSP_HEADER_SIZE (sizeof(struct ssp_msg_header)) +#define SSP_HEADER_SIZE_ALIGNED (ALIGN(SSP_HEADER_SIZE, 4)) + +static struct ssp_msg *ssp_create_msg(u8 cmd, u16 len, u16 opt, u32 data) +{ + struct ssp_msg_header h; + struct ssp_msg *msg; + + msg = kzalloc(sizeof(*msg), GFP_KERNEL); + if (!msg) + return NULL; + + h.cmd = cmd; + h.length = cpu_to_le16(len); + h.options = cpu_to_le16(opt); + h.data = cpu_to_le32(data); + + msg->buffer = kzalloc(SSP_HEADER_SIZE_ALIGNED + len, + GFP_KERNEL | GFP_DMA); + if (!msg->buffer) { + kfree(msg); + return NULL; + } + + msg->length = len; + msg->options = opt; + + memcpy(msg->buffer, &h, SSP_HEADER_SIZE); + + return msg; +} + +/* + * It is a bit heavy to do it this way but often the function is used to compose + * the message from smaller chunks which are placed on the stack. Often the + * chunks are small so memcpy should be optimalized. + */ +static inline void ssp_fill_buffer(struct ssp_msg *m, unsigned int offset, + const void *src, unsigned int len) +{ + memcpy(&m->buffer[SSP_HEADER_SIZE_ALIGNED + offset], src, len); +} + +static inline void ssp_get_buffer(struct ssp_msg *m, unsigned int offset, + void *dest, unsigned int len) +{ + memcpy(dest, &m->buffer[SSP_HEADER_SIZE_ALIGNED + offset], len); +} + +#define SSP_GET_BUFFER_AT_INDEX(m, index) \ + (m->buffer[SSP_HEADER_SIZE_ALIGNED + index]) +#define SSP_SET_BUFFER_AT_INDEX(m, index, val) \ + (m->buffer[SSP_HEADER_SIZE_ALIGNED + index] = val) + +static void ssp_clean_msg(struct ssp_msg *m) +{ + kfree(m->buffer); + kfree(m); +} + +static int ssp_print_mcu_debug(char *data_frame, int *data_index, + int received_len) +{ + int length = data_frame[(*data_index)++]; + + if (length > received_len - *data_index || length <= 0) { + ssp_dbg("[SSP]: MSG From MCU-invalid debug length(%d/%d)\n", + length, received_len); + return length ? length : -EPROTO; + } + + ssp_dbg("[SSP]: MSG From MCU - %s\n", &data_frame[*data_index]); + + *data_index += length; + + return 0; +} + +/* + * It was designed that way - additional lines to some kind of handshake, + * please do not ask why - only the firmware guy can know it. + */ +static int ssp_check_lines(struct ssp_data *data, bool state) +{ + int delay_cnt = 0; + + gpio_set_value_cansleep(data->ap_mcu_gpio, state); + + while (gpio_get_value_cansleep(data->mcu_ap_gpio) != state) { + usleep_range(3000, 3500); + + if (data->shut_down || delay_cnt++ > 500) { + dev_err(SSP_DEV, "%s:timeout, hw ack wait fail %d\n", + __func__, state); + + if (!state) + gpio_set_value_cansleep(data->ap_mcu_gpio, 1); + + return -ETIMEDOUT; + } + } + + return 0; +} + +static int ssp_do_transfer(struct ssp_data *data, struct ssp_msg *msg, + struct completion *done, int timeout) +{ + int status; + /* + * check if this is a short one way message or the whole transfer has + * second part after an interrupt + */ + const bool use_no_irq = msg->length == 0; + + if (data->shut_down) + return -EPERM; + + msg->done = done; + + mutex_lock(&data->comm_lock); + + status = ssp_check_lines(data, false); + if (status < 0) + goto _error_locked; + + status = spi_write(data->spi, msg->buffer, SSP_HEADER_SIZE); + if (status < 0) { + gpio_set_value_cansleep(data->ap_mcu_gpio, 1); + dev_err(SSP_DEV, "%s spi_write fail\n", __func__); + goto _error_locked; + } + + if (!use_no_irq) { + mutex_lock(&data->pending_lock); + list_add_tail(&msg->list, &data->pending_list); + mutex_unlock(&data->pending_lock); + } + + status = ssp_check_lines(data, true); + if (status < 0) { + if (!use_no_irq) { + mutex_lock(&data->pending_lock); + list_del(&msg->list); + mutex_unlock(&data->pending_lock); + } + goto _error_locked; + } + + mutex_unlock(&data->comm_lock); + + if (!use_no_irq && done) + if (wait_for_completion_timeout(done, + msecs_to_jiffies(timeout)) == + 0) { + mutex_lock(&data->pending_lock); + list_del(&msg->list); + mutex_unlock(&data->pending_lock); + + data->timeout_cnt++; + return -ETIMEDOUT; + } + + return 0; + +_error_locked: + mutex_unlock(&data->comm_lock); + data->timeout_cnt++; + return status; +} + +static inline int ssp_spi_sync_command(struct ssp_data *data, + struct ssp_msg *msg) +{ + return ssp_do_transfer(data, msg, NULL, 0); +} + +static int ssp_spi_sync(struct ssp_data *data, struct ssp_msg *msg, + int timeout) +{ + DECLARE_COMPLETION_ONSTACK(done); + + if (WARN_ON(!msg->length)) + return -EPERM; + + return ssp_do_transfer(data, msg, &done, timeout); +} + +static int ssp_handle_big_data(struct ssp_data *data, char *dataframe, int *idx) +{ + /* mock-up, it will be changed with adding another sensor types */ + *idx += 8; + return 0; +} + +static int ssp_parse_dataframe(struct ssp_data *data, char *dataframe, int len) +{ + int idx, sd; + struct timespec ts; + struct ssp_sensor_data *spd; + struct iio_dev **indio_devs = data->sensor_devs; + + getnstimeofday(&ts); + + for (idx = 0; idx < len;) { + switch (dataframe[idx++]) { + case SSP_MSG2AP_INST_BYPASS_DATA: + sd = dataframe[idx++]; + if (sd < 0 || sd >= SSP_SENSOR_MAX) { + dev_err(SSP_DEV, + "Mcu data frame1 error %d\n", sd); + return -EPROTO; + } + + if (indio_devs[sd]) { + spd = iio_priv(indio_devs[sd]); + if (spd->process_data) + spd->process_data(indio_devs[sd], + &dataframe[idx], + data->timestamp); + } else { + dev_err(SSP_DEV, "no client for frame\n"); + } + + idx += ssp_offset_map[sd]; + break; + case SSP_MSG2AP_INST_DEBUG_DATA: + sd = ssp_print_mcu_debug(dataframe, &idx, len); + if (sd) { + dev_err(SSP_DEV, + "Mcu data frame3 error %d\n", sd); + return sd; + } + break; + case SSP_MSG2AP_INST_LIBRARY_DATA: + idx += len; + break; + case SSP_MSG2AP_INST_BIG_DATA: + ssp_handle_big_data(data, dataframe, &idx); + break; + case SSP_MSG2AP_INST_TIME_SYNC: + data->time_syncing = true; + break; + case SSP_MSG2AP_INST_RESET: + ssp_queue_ssp_refresh_task(data, 0); + break; + } + } + + if (data->time_syncing) + data->timestamp = ts.tv_sec * 1000000000ULL + ts.tv_nsec; + + return 0; +} + +/* threaded irq */ +int ssp_irq_msg(struct ssp_data *data) +{ + bool found = false; + char *buffer; + u8 msg_type; + int ret; + u16 length, msg_options; + struct ssp_msg *msg, *n; + + ret = spi_read(data->spi, data->header_buffer, SSP_HEADER_BUFFER_SIZE); + if (ret < 0) { + dev_err(SSP_DEV, "header read fail\n"); + return ret; + } + + length = le16_to_cpu(data->header_buffer[1]); + msg_options = le16_to_cpu(data->header_buffer[0]); + + if (length == 0) { + dev_err(SSP_DEV, "length received from mcu is 0\n"); + return -EINVAL; + } + + msg_type = SSP_GET_MESSAGE_TYPE(msg_options); + + switch (msg_type) { + case SSP_AP2HUB_READ: + case SSP_AP2HUB_WRITE: + /* + * this is a small list, a few elements - the packets can be + * received with no order + */ + mutex_lock(&data->pending_lock); + list_for_each_entry_safe(msg, n, &data->pending_list, list) { + if (msg->options == msg_options) { + list_del(&msg->list); + found = true; + break; + } + } + + if (!found) { + /* + * here can be implemented dead messages handling + * but the slave should not send such ones - it is to + * check but let's handle this + */ + buffer = kmalloc(length, GFP_KERNEL | GFP_DMA); + if (!buffer) { + ret = -ENOMEM; + goto _unlock; + } + + /* got dead packet so it is always an error */ + ret = spi_read(data->spi, buffer, length); + if (ret >= 0) + ret = -EPROTO; + + kfree(buffer); + + dev_err(SSP_DEV, "No match error %x\n", + msg_options); + + goto _unlock; + } + + if (msg_type == SSP_AP2HUB_READ) + ret = spi_read(data->spi, + &msg->buffer[SSP_HEADER_SIZE_ALIGNED], + msg->length); + + if (msg_type == SSP_AP2HUB_WRITE) { + ret = spi_write(data->spi, + &msg->buffer[SSP_HEADER_SIZE_ALIGNED], + msg->length); + if (msg_options & SSP_AP2HUB_RETURN) { + msg->options = + SSP_AP2HUB_READ | SSP_AP2HUB_RETURN; + msg->length = 1; + + list_add_tail(&msg->list, &data->pending_list); + goto _unlock; + } + } + + if (msg->done) + if (!completion_done(msg->done)) + complete(msg->done); +_unlock: + mutex_unlock(&data->pending_lock); + break; + case SSP_HUB2AP_WRITE: + buffer = kzalloc(length, GFP_KERNEL | GFP_DMA); + if (!buffer) + return -ENOMEM; + + ret = spi_read(data->spi, buffer, length); + if (ret < 0) { + dev_err(SSP_DEV, "spi read fail\n"); + kfree(buffer); + break; + } + + ret = ssp_parse_dataframe(data, buffer, length); + + kfree(buffer); + break; + + default: + dev_err(SSP_DEV, "unknown msg type\n"); + return -EPROTO; + } + + return ret; +} + +void ssp_clean_pending_list(struct ssp_data *data) +{ + struct ssp_msg *msg, *n; + + mutex_lock(&data->pending_lock); + list_for_each_entry_safe(msg, n, &data->pending_list, list) { + list_del(&msg->list); + + if (msg->done) + if (!completion_done(msg->done)) + complete(msg->done); + } + mutex_unlock(&data->pending_lock); +} + +int ssp_command(struct ssp_data *data, char command, int arg) +{ + int ret; + struct ssp_msg *msg; + + msg = ssp_create_msg(command, 0, SSP_AP2HUB_WRITE, arg); + if (!msg) + return -ENOMEM; + + ssp_dbg("%s - command 0x%x %d\n", __func__, command, arg); + + ret = ssp_spi_sync_command(data, msg); + ssp_clean_msg(msg); + + return ret; +} + +int ssp_send_instruction(struct ssp_data *data, u8 inst, u8 sensor_type, + u8 *send_buf, u8 length) +{ + int ret; + struct ssp_msg *msg; + + if (data->fw_dl_state == SSP_FW_DL_STATE_DOWNLOADING) { + dev_err(SSP_DEV, "%s - Skip Inst! DL state = %d\n", + __func__, data->fw_dl_state); + return -EBUSY; + } else if (!(data->available_sensors & BIT(sensor_type)) && + (inst <= SSP_MSG2SSP_INST_CHANGE_DELAY)) { + dev_err(SSP_DEV, "%s - Bypass Inst Skip! - %u\n", + __func__, sensor_type); + return -EIO; /* just fail */ + } + + msg = ssp_create_msg(inst, length + 2, SSP_AP2HUB_WRITE, 0); + if (!msg) + return -ENOMEM; + + ssp_fill_buffer(msg, 0, &sensor_type, 1); + ssp_fill_buffer(msg, 1, send_buf, length); + + ssp_dbg("%s - Inst = 0x%x, Sensor Type = 0x%x, data = %u\n", + __func__, inst, sensor_type, send_buf[1]); + + ret = ssp_spi_sync(data, msg, 1000); + ssp_clean_msg(msg); + + return ret; +} + +int ssp_get_chipid(struct ssp_data *data) +{ + int ret; + char buffer; + struct ssp_msg *msg; + + msg = ssp_create_msg(SSP_MSG2SSP_AP_WHOAMI, 1, SSP_AP2HUB_READ, 0); + if (!msg) + return -ENOMEM; + + ret = ssp_spi_sync(data, msg, 1000); + + buffer = SSP_GET_BUFFER_AT_INDEX(msg, 0); + + ssp_clean_msg(msg); + + return ret < 0 ? ret : buffer; +} + +int ssp_set_magnetic_matrix(struct ssp_data *data) +{ + int ret; + struct ssp_msg *msg; + + msg = ssp_create_msg(SSP_MSG2SSP_AP_SET_MAGNETIC_STATIC_MATRIX, + data->sensorhub_info->mag_length, SSP_AP2HUB_WRITE, + 0); + if (!msg) + return -ENOMEM; + + ssp_fill_buffer(msg, 0, data->sensorhub_info->mag_table, + data->sensorhub_info->mag_length); + + ret = ssp_spi_sync(data, msg, 1000); + ssp_clean_msg(msg); + + return ret; +} + +unsigned int ssp_get_sensor_scanning_info(struct ssp_data *data) +{ + int ret; + __le32 result; + u32 cpu_result = 0; + + struct ssp_msg *msg = ssp_create_msg(SSP_MSG2SSP_AP_SENSOR_SCANNING, 4, + SSP_AP2HUB_READ, 0); + if (!msg) + return 0; + + ret = ssp_spi_sync(data, msg, 1000); + if (ret < 0) { + dev_err(SSP_DEV, "%s - spi read fail %d\n", __func__, ret); + goto _exit; + } + + ssp_get_buffer(msg, 0, &result, 4); + cpu_result = le32_to_cpu(result); + + dev_info(SSP_DEV, "%s state: 0x%08x\n", __func__, cpu_result); + +_exit: + ssp_clean_msg(msg); + return cpu_result; +} + +unsigned int ssp_get_firmware_rev(struct ssp_data *data) +{ + int ret; + __le32 result; + + struct ssp_msg *msg = ssp_create_msg(SSP_MSG2SSP_AP_FIRMWARE_REV, 4, + SSP_AP2HUB_READ, 0); + if (!msg) + return SSP_INVALID_REVISION; + + ret = ssp_spi_sync(data, msg, 1000); + if (ret < 0) { + dev_err(SSP_DEV, "%s - transfer fail %d\n", __func__, ret); + ret = SSP_INVALID_REVISION; + goto _exit; + } + + ssp_get_buffer(msg, 0, &result, 4); + ret = le32_to_cpu(result); + +_exit: + ssp_clean_msg(msg); + return ret; +} diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c index 78a6a1ab3ece..5b377373f48d 100644 --- a/drivers/iio/common/st_sensors/st_sensors_spi.c +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c @@ -54,7 +54,7 @@ static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb, if (err) goto acc_spi_read_error; - memcpy(data, tb->rx_buf, len*sizeof(u8)); + memcpy(data, tb->rx_buf, len); mutex_unlock(&tb->buf_lock); return len; diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c index 7c5245d9f99c..50ed8d1ca45a 100644 --- a/drivers/iio/frequency/ad9523.c +++ b/drivers/iio/frequency/ad9523.c @@ -445,7 +445,7 @@ static int ad9523_store_eeprom(struct iio_dev *indio_dev) tmp = 4; do { - msleep(16); + msleep(20); ret = ad9523_read(indio_dev, AD9523_EEPROM_DATA_XFER_STATUS); if (ret < 0) diff --git a/drivers/iio/frequency/adf4350.c b/drivers/iio/frequency/adf4350.c index 63a25d9e1204..10a0dfc3b01f 100644 --- a/drivers/iio/frequency/adf4350.c +++ b/drivers/iio/frequency/adf4350.c @@ -387,10 +387,8 @@ static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev) int ret; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) { - dev_err(dev, "could not allocate memory for platform data\n"); + if (!pdata) return NULL; - } strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1); @@ -613,9 +611,8 @@ static int adf4350_remove(struct spi_device *spi) if (st->clk) clk_disable_unprepare(st->clk); - if (!IS_ERR(reg)) { + if (!IS_ERR(reg)) regulator_disable(reg); - } return 0; } diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile index 36a38776f739..f46341b39139 100644 --- a/drivers/iio/gyro/Makefile +++ b/drivers/iio/gyro/Makefile @@ -16,6 +16,8 @@ itg3200-y := itg3200_core.o itg3200-$(CONFIG_IIO_BUFFER) += itg3200_buffer.o obj-$(CONFIG_ITG3200) += itg3200.o +obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_gyro_sensor.o + obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o st_gyro-y := st_gyro_core.o st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c index bdcd105aba26..b5883b6f4e50 100644 --- a/drivers/iio/gyro/hid-sensor-gyro-3d.c +++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c @@ -111,19 +111,12 @@ static int gyro_3d_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; switch (mask) { case 0: - poll_value = hid_sensor_read_poll_value( - &gyro_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&gyro_state->common_attributes, true); - msleep_interruptible(poll_value * 2); report_id = gyro_state->gyro[chan->scan_index].report_id; address = gyro_3d_addresses[chan->scan_index]; if (report_id >= 0) @@ -417,6 +410,7 @@ static struct platform_driver hid_gyro_3d_platform_driver = { .id_table = hid_gyro_3d_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_gyro_3d_probe, .remove = hid_gyro_3d_remove, diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c new file mode 100644 index 000000000000..0a8afdd21728 --- /dev/null +++ b/drivers/iio/gyro/ssp_gyro_sensor.c @@ -0,0 +1,168 @@ +/* + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/common/ssp_sensors.h> +#include <linux/iio/iio.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include "../common/ssp_sensors/ssp_iio_sensor.h" + +#define SSP_CHANNEL_COUNT 3 + +#define SSP_GYROSCOPE_NAME "ssp-gyroscope" +static const char ssp_gyro_name[] = SSP_GYROSCOPE_NAME; + +enum ssp_gyro_3d_channel { + SSP_CHANNEL_SCAN_INDEX_X, + SSP_CHANNEL_SCAN_INDEX_Y, + SSP_CHANNEL_SCAN_INDEX_Z, + SSP_CHANNEL_SCAN_INDEX_TIME, +}; + +static int ssp_gyro_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + u32 t; + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + t = ssp_get_sensor_delay(data, SSP_GYROSCOPE_SENSOR); + ssp_convert_to_freq(t, val, val2); + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + + return -EINVAL; +} + +static int ssp_gyro_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + int ret; + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = ssp_convert_to_time(val, val2); + ret = ssp_change_delay(data, SSP_GYROSCOPE_SENSOR, ret); + if (ret < 0) + dev_err(&indio_dev->dev, "gyro sensor enable fail\n"); + + return ret; + default: + break; + } + + return -EINVAL; +} + +static struct iio_info ssp_gyro_iio_info = { + .read_raw = &ssp_gyro_read_raw, + .write_raw = &ssp_gyro_write_raw, +}; + +static const unsigned long ssp_gyro_scan_mask[] = { 0x07, 0, }; + +static const struct iio_chan_spec ssp_gyro_channels[] = { + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), + SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), +}; + +static int ssp_process_gyro_data(struct iio_dev *indio_dev, void *buf, + int64_t timestamp) +{ + return ssp_common_process_data(indio_dev, buf, SSP_GYROSCOPE_SIZE, + timestamp); +} + +static const struct iio_buffer_setup_ops ssp_gyro_buffer_ops = { + .postenable = &ssp_common_buffer_postenable, + .postdisable = &ssp_common_buffer_postdisable, +}; + +static int ssp_gyro_probe(struct platform_device *pdev) +{ + int ret; + struct iio_dev *indio_dev; + struct ssp_sensor_data *spd; + struct iio_buffer *buffer; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd)); + if (!indio_dev) + return -ENOMEM; + + spd = iio_priv(indio_dev); + + spd->process_data = ssp_process_gyro_data; + spd->type = SSP_GYROSCOPE_SENSOR; + + indio_dev->name = ssp_gyro_name; + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &ssp_gyro_iio_info; + indio_dev->modes = INDIO_BUFFER_SOFTWARE; + indio_dev->channels = ssp_gyro_channels; + indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels); + indio_dev->available_scan_masks = ssp_gyro_scan_mask; + + buffer = devm_iio_kfifo_allocate(&pdev->dev); + if (!buffer) + return -ENOMEM; + + iio_device_attach_buffer(indio_dev, buffer); + + indio_dev->setup_ops = &ssp_gyro_buffer_ops; + + platform_set_drvdata(pdev, indio_dev); + + ret = iio_device_register(indio_dev); + if (ret < 0) + return ret; + + /* ssp registering should be done after all iio setup */ + ssp_register_consumer(indio_dev, SSP_GYROSCOPE_SENSOR); + + return 0; +} + +static int ssp_gyro_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + iio_device_unregister(indio_dev); + + return 0; +} + +static struct platform_driver ssp_gyro_driver = { + .driver = { + .name = SSP_GYROSCOPE_NAME, + }, + .probe = ssp_gyro_probe, + .remove = ssp_gyro_remove, +}; + +module_platform_driver(ssp_gyro_driver); + +MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); +MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h index 5f0ea77fe717..359883525ab7 100644 --- a/drivers/iio/iio_core.h +++ b/drivers/iio/iio_core.h @@ -48,6 +48,8 @@ unsigned int iio_buffer_poll(struct file *filp, ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf, size_t n, loff_t *f_ps); +int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); +void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); #define iio_buffer_poll_addr (&iio_buffer_poll) #define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer) @@ -60,6 +62,13 @@ void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); #define iio_buffer_poll_addr NULL #define iio_buffer_read_first_n_outer_addr NULL +static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} + static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} diff --git a/drivers/iio/imu/Kconfig b/drivers/iio/imu/Kconfig index 2b0e45133e9d..5e610f7de5aa 100644 --- a/drivers/iio/imu/Kconfig +++ b/drivers/iio/imu/Kconfig @@ -25,6 +25,17 @@ config ADIS16480 Say yes here to build support for Analog Devices ADIS16375, ADIS16480, ADIS16485, ADIS16488 inertial sensors. +config KMX61 + tristate "Kionix KMX61 6-axis accelerometer and magnetometer" + depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say Y here if you want to build a driver for Kionix KMX61 6-axis + accelerometer and magnetometer. + To compile this driver as module, choose M here: the module will + be called kmx61. + source "drivers/iio/imu/inv_mpu6050/Kconfig" endmenu diff --git a/drivers/iio/imu/Makefile b/drivers/iio/imu/Makefile index 114d2c17cbe2..e1e6e3d70e26 100644 --- a/drivers/iio/imu/Makefile +++ b/drivers/iio/imu/Makefile @@ -14,3 +14,5 @@ adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_buffer.o obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o obj-y += inv_mpu6050/ + +obj-$(CONFIG_KMX61) += kmx61.o diff --git a/drivers/iio/imu/inv_mpu6050/Kconfig b/drivers/iio/imu/inv_mpu6050/Kconfig index 2d0608ba88d7..48fbc0bc7e2a 100644 --- a/drivers/iio/imu/inv_mpu6050/Kconfig +++ b/drivers/iio/imu/inv_mpu6050/Kconfig @@ -7,6 +7,7 @@ config INV_MPU6050_IIO depends on I2C && SYSFS select IIO_BUFFER select IIO_TRIGGERED_BUFFER + select I2C_MUX help This driver supports the Invensense MPU6050 devices. This driver can also support MPU6500 in MPU6050 compatibility mode diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index b75519deac1a..f73e60b7a796 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -23,6 +23,8 @@ #include <linux/kfifo.h> #include <linux/spinlock.h> #include <linux/iio/iio.h> +#include <linux/i2c-mux.h> +#include <linux/acpi.h> #include "inv_mpu_iio.h" /* @@ -52,6 +54,7 @@ static const struct inv_mpu6050_reg_map reg_set_6050 = { .int_enable = INV_MPU6050_REG_INT_ENABLE, .pwr_mgmt_1 = INV_MPU6050_REG_PWR_MGMT_1, .pwr_mgmt_2 = INV_MPU6050_REG_PWR_MGMT_2, + .int_pin_cfg = INV_MPU6050_REG_INT_PIN_CFG, }; static const struct inv_mpu6050_chip_config chip_config_6050 = { @@ -77,6 +80,83 @@ int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 d) return i2c_smbus_write_i2c_block_data(st->client, reg, 1, &d); } +/* + * The i2c read/write needs to happen in unlocked mode. As the parent + * adapter is common. If we use locked versions, it will fail as + * the mux adapter will lock the parent i2c adapter, while calling + * select/deselect functions. + */ +static int inv_mpu6050_write_reg_unlocked(struct inv_mpu6050_state *st, + u8 reg, u8 d) +{ + int ret; + u8 buf[2]; + struct i2c_msg msg[1] = { + { + .addr = st->client->addr, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = reg; + buf[1] = d; + ret = __i2c_transfer(st->client->adapter, msg, 1); + if (ret != 1) + return ret; + + return 0; +} + +static int inv_mpu6050_select_bypass(struct i2c_adapter *adap, void *mux_priv, + u32 chan_id) +{ + struct iio_dev *indio_dev = mux_priv; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int ret = 0; + + /* Use the same mutex which was used everywhere to protect power-op */ + mutex_lock(&indio_dev->mlock); + if (!st->powerup_count) { + ret = inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1, + 0); + if (ret) + goto write_error; + + msleep(INV_MPU6050_REG_UP_TIME); + } + if (!ret) { + st->powerup_count++; + ret = inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg, + st->client->irq | + INV_MPU6050_BIT_BYPASS_EN); + } +write_error: + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int inv_mpu6050_deselect_bypass(struct i2c_adapter *adap, + void *mux_priv, u32 chan_id) +{ + struct iio_dev *indio_dev = mux_priv; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + mutex_lock(&indio_dev->mlock); + /* It doesn't really mattter, if any of the calls fails */ + inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg, + st->client->irq); + st->powerup_count--; + if (!st->powerup_count) + inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1, + INV_MPU6050_BIT_SLEEP); + mutex_unlock(&indio_dev->mlock); + + return 0; +} + int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask) { u8 d, mgmt_1; @@ -133,13 +213,22 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask) int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on) { - int result; + int result = 0; + + if (power_on) { + /* Already under indio-dev->mlock mutex */ + if (!st->powerup_count) + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, + 0); + if (!result) + st->powerup_count++; + } else { + st->powerup_count--; + if (!st->powerup_count) + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, + INV_MPU6050_BIT_SLEEP); + } - if (power_on) - result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, 0); - else - result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, - INV_MPU6050_BIT_SLEEP); if (result) return result; @@ -673,6 +762,7 @@ static int inv_mpu_probe(struct i2c_client *client, st = iio_priv(indio_dev); st->client = client; + st->powerup_count = 0; pdata = dev_get_platdata(&client->dev); if (pdata) st->plat_data = *pdata; @@ -720,8 +810,21 @@ static int inv_mpu_probe(struct i2c_client *client, goto out_remove_trigger; } + st->mux_adapter = i2c_add_mux_adapter(client->adapter, + &client->dev, + indio_dev, + 0, 0, 0, + inv_mpu6050_select_bypass, + inv_mpu6050_deselect_bypass); + if (!st->mux_adapter) { + result = -ENODEV; + goto out_unreg_device; + } + return 0; +out_unreg_device: + iio_device_unregister(indio_dev); out_remove_trigger: inv_mpu6050_remove_trigger(st); out_unreg_ring: @@ -734,6 +837,7 @@ static int inv_mpu_remove(struct i2c_client *client) struct iio_dev *indio_dev = i2c_get_clientdata(client); struct inv_mpu6050_state *st = iio_priv(indio_dev); + i2c_del_mux_adapter(st->mux_adapter); iio_device_unregister(indio_dev); inv_mpu6050_remove_trigger(st); iio_triggered_buffer_cleanup(indio_dev); @@ -772,6 +876,13 @@ static const struct i2c_device_id inv_mpu_id[] = { MODULE_DEVICE_TABLE(i2c, inv_mpu_id); +static const struct acpi_device_id inv_acpi_match[] = { + {"INVN6500", 0}, + { }, +}; + +MODULE_DEVICE_TABLE(acpi, inv_acpi_match); + static struct i2c_driver inv_mpu_driver = { .probe = inv_mpu_probe, .remove = inv_mpu_remove, @@ -780,6 +891,7 @@ static struct i2c_driver inv_mpu_driver = { .owner = THIS_MODULE, .name = "inv-mpu6050", .pm = INV_MPU6050_PMOPS, + .acpi_match_table = ACPI_PTR(inv_acpi_match), }, }; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index e7799315d4dc..aa837de57079 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -54,6 +54,7 @@ struct inv_mpu6050_reg_map { u8 int_enable; u8 pwr_mgmt_1; u8 pwr_mgmt_2; + u8 int_pin_cfg; }; /*device enum */ @@ -119,6 +120,8 @@ struct inv_mpu6050_state { enum inv_devices chip_type; spinlock_t time_stamp_lock; struct i2c_client *client; + struct i2c_adapter *mux_adapter; + unsigned int powerup_count; struct inv_mpu6050_platform_data plat_data; DECLARE_KFIFO(timestamps, long long, TIMESTAMP_FIFO_SIZE); }; @@ -179,6 +182,9 @@ struct inv_mpu6050_state { /* 6 + 6 round up and plus 8 */ #define INV_MPU6050_OUTPUT_DATA_SIZE 24 +#define INV_MPU6050_REG_INT_PIN_CFG 0x37 +#define INV_MPU6050_BIT_BYPASS_EN 0x2 + /* init parameters */ #define INV_MPU6050_INIT_FIFO_RATE 50 #define INV_MPU6050_TIME_STAMP_TOR 5 diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c index 926fccea8de0..844610c3a3a9 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -116,40 +116,35 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev) int ret; struct inv_mpu6050_state *st = iio_priv(indio_dev); - st->trig = iio_trigger_alloc("%s-dev%d", - indio_dev->name, - indio_dev->id); - if (st->trig == NULL) { - ret = -ENOMEM; - goto error_ret; - } - ret = request_irq(st->client->irq, &iio_trigger_generic_data_rdy_poll, - IRQF_TRIGGER_RISING, - "inv_mpu", - st->trig); + st->trig = devm_iio_trigger_alloc(&indio_dev->dev, + "%s-dev%d", + indio_dev->name, + indio_dev->id); + if (!st->trig) + return -ENOMEM; + + ret = devm_request_irq(&indio_dev->dev, st->client->irq, + &iio_trigger_generic_data_rdy_poll, + IRQF_TRIGGER_RISING, + "inv_mpu", + st->trig); if (ret) - goto error_free_trig; + return ret; + st->trig->dev.parent = &st->client->dev; st->trig->ops = &inv_mpu_trigger_ops; iio_trigger_set_drvdata(st->trig, indio_dev); + ret = iio_trigger_register(st->trig); if (ret) - goto error_free_irq; + return ret; + indio_dev->trig = iio_trigger_get(st->trig); return 0; - -error_free_irq: - free_irq(st->client->irq, st->trig); -error_free_trig: - iio_trigger_free(st->trig); -error_ret: - return ret; } void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st) { iio_trigger_unregister(st->trig); - free_irq(st->client->irq, st->trig); - iio_trigger_free(st->trig); } diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c new file mode 100644 index 000000000000..5cc3692acf37 --- /dev/null +++ b/drivers/iio/imu/kmx61.c @@ -0,0 +1,1595 @@ +/* + * KMX61 - Kionix 6-axis Accelerometer/Magnetometer + * + * Copyright (c) 2014, Intel Corporation. + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + * + * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F). + * + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/iio/trigger.h> +#include <linux/iio/buffer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> + +#define KMX61_DRV_NAME "kmx61" +#define KMX61_GPIO_NAME "kmx61_int" +#define KMX61_IRQ_NAME "kmx61_event" + +#define KMX61_REG_WHO_AM_I 0x00 +#define KMX61_REG_INS1 0x01 +#define KMX61_REG_INS2 0x02 + +/* + * three 16-bit accelerometer output registers for X/Y/Z axis + * we use only XOUT_L as a base register, all other addresses + * can be obtained by applying an offset and are provided here + * only for clarity. + */ +#define KMX61_ACC_XOUT_L 0x0A +#define KMX61_ACC_XOUT_H 0x0B +#define KMX61_ACC_YOUT_L 0x0C +#define KMX61_ACC_YOUT_H 0x0D +#define KMX61_ACC_ZOUT_L 0x0E +#define KMX61_ACC_ZOUT_H 0x0F + +/* + * one 16-bit temperature output register + */ +#define KMX61_TEMP_L 0x10 +#define KMX61_TEMP_H 0x11 + +/* + * three 16-bit magnetometer output registers for X/Y/Z axis + */ +#define KMX61_MAG_XOUT_L 0x12 +#define KMX61_MAG_XOUT_H 0x13 +#define KMX61_MAG_YOUT_L 0x14 +#define KMX61_MAG_YOUT_H 0x15 +#define KMX61_MAG_ZOUT_L 0x16 +#define KMX61_MAG_ZOUT_H 0x17 + +#define KMX61_REG_INL 0x28 +#define KMX61_REG_STBY 0x29 +#define KMX61_REG_CTRL1 0x2A +#define KMX61_REG_CTRL2 0x2B +#define KMX61_REG_ODCNTL 0x2C +#define KMX61_REG_INC1 0x2D + +#define KMX61_REG_WUF_THRESH 0x3D +#define KMX61_REG_WUF_TIMER 0x3E + +#define KMX61_ACC_STBY_BIT BIT(0) +#define KMX61_MAG_STBY_BIT BIT(1) +#define KMX61_ACT_STBY_BIT BIT(7) + +#define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT) + +#define KMX61_REG_INS1_BIT_WUFS BIT(1) + +#define KMX61_REG_INS2_BIT_ZP BIT(0) +#define KMX61_REG_INS2_BIT_ZN BIT(1) +#define KMX61_REG_INS2_BIT_YP BIT(2) +#define KMX61_REG_INS2_BIT_YN BIT(3) +#define KMX61_REG_INS2_BIT_XP BIT(4) +#define KMX61_REG_INS2_BIT_XN BIT(5) + +#define KMX61_REG_CTRL1_GSEL_MASK 0x03 + +#define KMX61_REG_CTRL1_BIT_RES BIT(4) +#define KMX61_REG_CTRL1_BIT_DRDYE BIT(5) +#define KMX61_REG_CTRL1_BIT_WUFE BIT(6) +#define KMX61_REG_CTRL1_BIT_BTSE BIT(7) + +#define KMX61_REG_INC1_BIT_WUFS BIT(0) +#define KMX61_REG_INC1_BIT_DRDYM BIT(1) +#define KMX61_REG_INC1_BIT_DRDYA BIT(2) +#define KMX61_REG_INC1_BIT_IEN BIT(5) + +#define KMX61_ACC_ODR_SHIFT 0 +#define KMX61_MAG_ODR_SHIFT 4 +#define KMX61_ACC_ODR_MASK 0x0F +#define KMX61_MAG_ODR_MASK 0xF0 + +#define KMX61_OWUF_MASK 0x7 + +#define KMX61_DEFAULT_WAKE_THRESH 1 +#define KMX61_DEFAULT_WAKE_DURATION 1 + +#define KMX61_SLEEP_DELAY_MS 2000 + +#define KMX61_CHIP_ID 0x12 + +/* KMX61 devices */ +#define KMX61_ACC 0x01 +#define KMX61_MAG 0x02 + +struct kmx61_data { + struct i2c_client *client; + + /* serialize access to non-atomic ops, e.g set_mode */ + struct mutex lock; + + /* standby state */ + bool acc_stby; + bool mag_stby; + + /* power state */ + bool acc_ps; + bool mag_ps; + + /* config bits */ + u8 range; + u8 odr_bits; + u8 wake_thresh; + u8 wake_duration; + + /* accelerometer specific data */ + struct iio_dev *acc_indio_dev; + struct iio_trigger *acc_dready_trig; + struct iio_trigger *motion_trig; + bool acc_dready_trig_on; + bool motion_trig_on; + bool ev_enable_state; + + /* magnetometer specific data */ + struct iio_dev *mag_indio_dev; + struct iio_trigger *mag_dready_trig; + bool mag_dready_trig_on; +}; + +enum kmx61_range { + KMX61_RANGE_2G, + KMX61_RANGE_4G, + KMX61_RANGE_8G, +}; + +enum kmx61_axis { + KMX61_AXIS_X, + KMX61_AXIS_Y, + KMX61_AXIS_Z, +}; + +static const u16 kmx61_uscale_table[] = {9582, 19163, 38326}; + +static const struct { + int val; + int val2; + u8 odr_bits; +} kmx61_samp_freq_table[] = { {12, 500000, 0x00}, + {25, 0, 0x01}, + {50, 0, 0x02}, + {100, 0, 0x03}, + {200, 0, 0x04}, + {400, 0, 0x05}, + {800, 0, 0x06}, + {1600, 0, 0x07}, + {0, 781000, 0x08}, + {1, 563000, 0x09}, + {3, 125000, 0x0A}, + {6, 250000, 0x0B} }; + +static const struct { + int val; + int val2; + int odr_bits; +} kmx61_wake_up_odr_table[] = { {0, 781000, 0x00}, + {1, 563000, 0x01}, + {3, 125000, 0x02}, + {6, 250000, 0x03}, + {12, 500000, 0x04}, + {25, 0, 0x05}, + {50, 0, 0x06}, + {100, 0, 0x06}, + {200, 0, 0x06}, + {400, 0, 0x06}, + {800, 0, 0x06}, + {1600, 0, 0x06} }; + +static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326"); +static IIO_CONST_ATTR(magn_scale_available, "0.001465"); +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( + "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800"); + +static struct attribute *kmx61_acc_attributes[] = { + &iio_const_attr_accel_scale_available.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static struct attribute *kmx61_mag_attributes[] = { + &iio_const_attr_magn_scale_available.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group kmx61_acc_attribute_group = { + .attrs = kmx61_acc_attributes, +}; + +static const struct attribute_group kmx61_mag_attribute_group = { + .attrs = kmx61_mag_attributes, +}; + +static const struct iio_event_spec kmx61_event = { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_PERIOD), +}; + +#define KMX61_ACC_CHAN(_axis) { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## _axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .address = KMX61_ACC, \ + .scan_index = KMX61_AXIS_ ## _axis, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 12, \ + .storagebits = 16, \ + .shift = 4, \ + .endianness = IIO_LE, \ + }, \ + .event_spec = &kmx61_event, \ + .num_event_specs = 1 \ +} + +#define KMX61_MAG_CHAN(_axis) { \ + .type = IIO_MAGN, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## _axis, \ + .address = KMX61_MAG, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .scan_index = KMX61_AXIS_ ## _axis, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 14, \ + .storagebits = 16, \ + .shift = 2, \ + .endianness = IIO_LE, \ + }, \ +} + +static const struct iio_chan_spec kmx61_acc_channels[] = { + KMX61_ACC_CHAN(X), + KMX61_ACC_CHAN(Y), + KMX61_ACC_CHAN(Z), +}; + +static const struct iio_chan_spec kmx61_mag_channels[] = { + KMX61_MAG_CHAN(X), + KMX61_MAG_CHAN(Y), + KMX61_MAG_CHAN(Z), +}; + +static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data) +{ + struct kmx61_data **priv = iio_priv(indio_dev); + + *priv = data; +} + +static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev) +{ + return *(struct kmx61_data **)iio_priv(indio_dev); +} + +static int kmx61_convert_freq_to_bit(int val, int val2) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) + if (val == kmx61_samp_freq_table[i].val && + val2 == kmx61_samp_freq_table[i].val2) + return kmx61_samp_freq_table[i].odr_bits; + return -EINVAL; +} + +static int kmx61_convert_bit_to_freq(u8 odr_bits, int *val, int *val2) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) + if (odr_bits == kmx61_samp_freq_table[i].odr_bits) { + *val = kmx61_samp_freq_table[i].val; + *val2 = kmx61_samp_freq_table[i].val2; + return 0; + } + return -EINVAL; +} + + +static int kmx61_convert_wake_up_odr_to_bit(int val, int val2) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i) + if (kmx61_wake_up_odr_table[i].val == val && + kmx61_wake_up_odr_table[i].val2 == val2) + return kmx61_wake_up_odr_table[i].odr_bits; + return -EINVAL; +} + +/** + * kmx61_set_mode() - set KMX61 device operating mode + * @data - kmx61 device private data pointer + * @mode - bitmask, indicating operating mode for @device + * @device - bitmask, indicating device for which @mode needs to be set + * @update - update stby bits stored in device's private @data + * + * For each sensor (accelerometer/magnetometer) there are two operating modes + * STANDBY and OPERATION. Neither accel nor magn can be disabled independently + * if they are both enabled. Internal sensors state is saved in acc_stby and + * mag_stby members of driver's private @data. + */ +static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device, + bool update) +{ + int ret; + int acc_stby = -1, mag_stby = -1; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_stby\n"); + return ret; + } + if (device & KMX61_ACC) { + if (mode & KMX61_ACC_STBY_BIT) { + ret |= KMX61_ACC_STBY_BIT; + acc_stby = 1; + } else { + ret &= ~KMX61_ACC_STBY_BIT; + acc_stby = 0; + } + } + + if (device & KMX61_MAG) { + if (mode & KMX61_MAG_STBY_BIT) { + ret |= KMX61_MAG_STBY_BIT; + mag_stby = 1; + } else { + ret &= ~KMX61_MAG_STBY_BIT; + mag_stby = 0; + } + } + + if (mode & KMX61_ACT_STBY_BIT) + ret |= KMX61_ACT_STBY_BIT; + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_stby\n"); + return ret; + } + + if (acc_stby != -1 && update) + data->acc_stby = acc_stby; + if (mag_stby != -1 && update) + data->mag_stby = mag_stby; + + return 0; +} + +static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device) +{ + int ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_stby\n"); + return ret; + } + *mode = 0; + + if (device & KMX61_ACC) { + if (ret & KMX61_ACC_STBY_BIT) + *mode |= KMX61_ACC_STBY_BIT; + else + *mode &= ~KMX61_ACC_STBY_BIT; + } + + if (device & KMX61_MAG) { + if (ret & KMX61_MAG_STBY_BIT) + *mode |= KMX61_MAG_STBY_BIT; + else + *mode &= ~KMX61_MAG_STBY_BIT; + } + + return 0; +} + +static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2) +{ + int ret, odr_bits; + + odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2); + if (odr_bits < 0) + return odr_bits; + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2, + odr_bits); + if (ret < 0) + dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); + return ret; +} + +static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device) +{ + int ret; + u8 mode; + int lodr_bits, odr_bits; + + ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); + if (ret < 0) + return ret; + + lodr_bits = kmx61_convert_freq_to_bit(val, val2); + if (lodr_bits < 0) + return lodr_bits; + + /* To change ODR, accel and magn must be in STDBY */ + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, + true); + if (ret < 0) + return ret; + + odr_bits = 0; + if (device & KMX61_ACC) + odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT; + if (device & KMX61_MAG) + odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT; + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL, + odr_bits); + if (ret < 0) + return ret; + + data->odr_bits = odr_bits; + + if (device & KMX61_ACC) { + ret = kmx61_set_wake_up_odr(data, val, val2); + if (ret) + return ret; + } + + return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); +} + +static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2, + u8 device) +{ int i; + u8 lodr_bits; + + if (device & KMX61_ACC) + lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) & + KMX61_ACC_ODR_MASK; + else if (device & KMX61_MAG) + lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) & + KMX61_MAG_ODR_MASK; + else + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) + if (lodr_bits == kmx61_samp_freq_table[i].odr_bits) { + *val = kmx61_samp_freq_table[i].val; + *val2 = kmx61_samp_freq_table[i].val2; + return 0; + } + return -EINVAL; +} + +static int kmx61_set_range(struct kmx61_data *data, u8 range) +{ + int ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + return ret; + } + + ret &= ~KMX61_REG_CTRL1_GSEL_MASK; + ret |= range & KMX61_REG_CTRL1_GSEL_MASK; + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); + return ret; + } + + data->range = range; + + return 0; +} + +static int kmx61_set_scale(struct kmx61_data *data, u16 uscale) +{ + int ret, i; + u8 mode; + + for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) { + if (kmx61_uscale_table[i] == uscale) { + ret = kmx61_get_mode(data, &mode, + KMX61_ACC | KMX61_MAG); + if (ret < 0) + return ret; + + ret = kmx61_set_mode(data, KMX61_ALL_STBY, + KMX61_ACC | KMX61_MAG, true); + if (ret < 0) + return ret; + + ret = kmx61_set_range(data, i); + if (ret < 0) + return ret; + + return kmx61_set_mode(data, mode, + KMX61_ACC | KMX61_MAG, true); + } + } + return -EINVAL; +} + +static int kmx61_chip_init(struct kmx61_data *data) +{ + int ret, val, val2; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading who_am_i\n"); + return ret; + } + + if (ret != KMX61_CHIP_ID) { + dev_err(&data->client->dev, + "Wrong chip id, got %x expected %x\n", + ret, KMX61_CHIP_ID); + return -EINVAL; + } + + /* set accel 12bit, 4g range */ + ret = kmx61_set_range(data, KMX61_RANGE_4G); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_odcntl\n"); + return ret; + } + data->odr_bits = ret; + + /* set output data rate for wake up (motion detection) function */ + ret = kmx61_convert_bit_to_freq(data->odr_bits, &val, &val2); + if (ret < 0) + return ret; + + ret = kmx61_set_wake_up_odr(data, val, val2); + if (ret < 0) + return ret; + + /* set acc/magn to OPERATION mode */ + ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true); + if (ret < 0) + return ret; + + data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH; + data->wake_duration = KMX61_DEFAULT_WAKE_DURATION; + + return 0; +} + +static int kmx61_setup_new_data_interrupt(struct kmx61_data *data, + bool status, u8 device) +{ + u8 mode; + int ret; + + ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); + if (ret < 0) + return ret; + + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + return ret; + } + + if (status) { + ret |= KMX61_REG_INC1_BIT_IEN; + if (device & KMX61_ACC) + ret |= KMX61_REG_INC1_BIT_DRDYA; + if (device & KMX61_MAG) + ret |= KMX61_REG_INC1_BIT_DRDYM; + } else { + ret &= ~KMX61_REG_INC1_BIT_IEN; + if (device & KMX61_ACC) + ret &= ~KMX61_REG_INC1_BIT_DRDYA; + if (device & KMX61_MAG) + ret &= ~KMX61_REG_INC1_BIT_DRDYM; + } + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); + return ret; + } + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + return ret; + } + + if (status) + ret |= KMX61_REG_CTRL1_BIT_DRDYE; + else + ret &= ~KMX61_REG_CTRL1_BIT_DRDYE; + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); + return ret; + } + + return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); +} + +static int kmx61_chip_update_thresholds(struct kmx61_data *data) +{ + int ret; + + ret = i2c_smbus_write_byte_data(data->client, + KMX61_REG_WUF_TIMER, + data->wake_duration); + if (ret < 0) { + dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n"); + return ret; + } + + ret = i2c_smbus_write_byte_data(data->client, + KMX61_REG_WUF_THRESH, + data->wake_thresh); + if (ret < 0) + dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n"); + + return ret; +} + +static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data, + bool status) +{ + u8 mode; + int ret; + + ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); + if (ret < 0) + return ret; + + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); + if (ret < 0) + return ret; + + ret = kmx61_chip_update_thresholds(data); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_inc1\n"); + return ret; + } + if (status) + ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); + else + ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_inc1\n"); + return ret; + } + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + return ret; + } + + if (status) + ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE; + else + ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE); + + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); + return ret; + } + mode |= KMX61_ACT_STBY_BIT; + return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); +} + +/** + * kmx61_set_power_state() - set power state for kmx61 @device + * @data - kmx61 device private pointer + * @on - power state to be set for @device + * @device - bitmask indicating device for which @on state needs to be set + * + * Notice that when ACC power state needs to be set to ON and MAG is in + * OPERATION then we know that kmx61_runtime_resume was already called + * so we must set ACC OPERATION mode here. The same happens when MAG power + * state needs to be set to ON and ACC is in OPERATION. + */ +static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device) +{ +#ifdef CONFIG_PM + int ret; + + if (device & KMX61_ACC) { + if (on && !data->acc_ps && !data->mag_stby) { + ret = kmx61_set_mode(data, 0, KMX61_ACC, true); + if (ret < 0) + return ret; + } + data->acc_ps = on; + } + if (device & KMX61_MAG) { + if (on && !data->mag_ps && !data->acc_stby) { + ret = kmx61_set_mode(data, 0, KMX61_MAG, true); + if (ret < 0) + return ret; + } + data->mag_ps = on; + } + + if (on) { + ret = pm_runtime_get_sync(&data->client->dev); + } else { + pm_runtime_mark_last_busy(&data->client->dev); + ret = pm_runtime_put_autosuspend(&data->client->dev); + } + if (ret < 0) { + dev_err(&data->client->dev, + "Failed: kmx61_set_power_state for %d, ret %d\n", + on, ret); + if (on) + pm_runtime_put_noidle(&data->client->dev); + + return ret; + } +#endif + return 0; +} + +static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset) +{ + int ret; + u8 reg = base + offset * 2; + + ret = i2c_smbus_read_word_data(data->client, reg); + if (ret < 0) + dev_err(&data->client->dev, "failed to read reg at %x\n", reg); + + return ret; +} + +static int kmx61_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + int ret; + u8 base_reg; + struct kmx61_data *data = kmx61_get_data(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_ACCEL: + base_reg = KMX61_ACC_XOUT_L; + break; + case IIO_MAGN: + base_reg = KMX61_MAG_XOUT_L; + break; + default: + return -EINVAL; + } + mutex_lock(&data->lock); + + ret = kmx61_set_power_state(data, true, chan->address); + if (ret) { + mutex_unlock(&data->lock); + return ret; + } + + ret = kmx61_read_measurement(data, base_reg, chan->scan_index); + if (ret < 0) { + kmx61_set_power_state(data, false, chan->address); + mutex_unlock(&data->lock); + return ret; + } + *val = sign_extend32(ret >> chan->scan_type.shift, + chan->scan_type.realbits - 1); + ret = kmx61_set_power_state(data, false, chan->address); + + mutex_unlock(&data->lock); + if (ret) + return ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ACCEL: + *val = 0; + *val2 = kmx61_uscale_table[data->range]; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_MAGN: + /* 14 bits res, 1465 microGauss per magn count */ + *val = 0; + *val2 = 1465; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SAMP_FREQ: + if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) + return -EINVAL; + + mutex_lock(&data->lock); + ret = kmx61_get_odr(data, val, val2, chan->address); + mutex_unlock(&data->lock); + if (ret) + return -EINVAL; + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; +} + +static int kmx61_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + int ret; + struct kmx61_data *data = kmx61_get_data(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) + return -EINVAL; + + mutex_lock(&data->lock); + ret = kmx61_set_odr(data, val, val2, chan->address); + mutex_unlock(&data->lock); + return ret; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ACCEL: + if (val != 0) + return -EINVAL; + mutex_lock(&data->lock); + ret = kmx61_set_scale(data, val2); + mutex_unlock(&data->lock); + return ret; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int kmx61_read_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + + *val2 = 0; + switch (info) { + case IIO_EV_INFO_VALUE: + *val = data->wake_thresh; + return IIO_VAL_INT; + case IIO_EV_INFO_PERIOD: + *val = data->wake_duration; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int kmx61_write_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + + if (data->ev_enable_state) + return -EBUSY; + + switch (info) { + case IIO_EV_INFO_VALUE: + data->wake_thresh = val; + return IIO_VAL_INT; + case IIO_EV_INFO_PERIOD: + data->wake_duration = val; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int kmx61_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + + return data->ev_enable_state; +} + +static int kmx61_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + int ret = 0; + + if (state && data->ev_enable_state) + return 0; + + mutex_lock(&data->lock); + + if (!state && data->motion_trig_on) { + data->ev_enable_state = false; + goto err_unlock; + } + + ret = kmx61_set_power_state(data, state, KMX61_ACC); + if (ret < 0) + goto err_unlock; + + ret = kmx61_setup_any_motion_interrupt(data, state); + if (ret < 0) { + kmx61_set_power_state(data, false, KMX61_ACC); + goto err_unlock; + } + + data->ev_enable_state = state; + +err_unlock: + mutex_unlock(&data->lock); + + return ret; +} + +static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev, + struct iio_trigger *trig) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + + if (data->acc_dready_trig != trig && data->motion_trig != trig) + return -EINVAL; + + return 0; +} + +static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev, + struct iio_trigger *trig) +{ + struct kmx61_data *data = kmx61_get_data(indio_dev); + + if (data->mag_dready_trig != trig) + return -EINVAL; + + return 0; +} + +static const struct iio_info kmx61_acc_info = { + .driver_module = THIS_MODULE, + .read_raw = kmx61_read_raw, + .write_raw = kmx61_write_raw, + .attrs = &kmx61_acc_attribute_group, + .read_event_value = kmx61_read_event, + .write_event_value = kmx61_write_event, + .read_event_config = kmx61_read_event_config, + .write_event_config = kmx61_write_event_config, + .validate_trigger = kmx61_acc_validate_trigger, +}; + +static const struct iio_info kmx61_mag_info = { + .driver_module = THIS_MODULE, + .read_raw = kmx61_read_raw, + .write_raw = kmx61_write_raw, + .attrs = &kmx61_mag_attribute_group, + .validate_trigger = kmx61_mag_validate_trigger, +}; + + +static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + int ret = 0; + u8 device; + + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct kmx61_data *data = kmx61_get_data(indio_dev); + + mutex_lock(&data->lock); + + if (!state && data->ev_enable_state && data->motion_trig_on) { + data->motion_trig_on = false; + goto err_unlock; + } + + if (data->acc_dready_trig == trig || data->motion_trig == trig) + device = KMX61_ACC; + else + device = KMX61_MAG; + + ret = kmx61_set_power_state(data, state, device); + if (ret < 0) + goto err_unlock; + + if (data->acc_dready_trig == trig || data->mag_dready_trig == trig) + ret = kmx61_setup_new_data_interrupt(data, state, device); + else + ret = kmx61_setup_any_motion_interrupt(data, state); + if (ret < 0) { + kmx61_set_power_state(data, false, device); + goto err_unlock; + } + + if (data->acc_dready_trig == trig) + data->acc_dready_trig_on = state; + else if (data->mag_dready_trig == trig) + data->mag_dready_trig_on = state; + else + data->motion_trig_on = state; +err_unlock: + mutex_unlock(&data->lock); + + return ret; +} + +static int kmx61_trig_try_reenable(struct iio_trigger *trig) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct kmx61_data *data = kmx61_get_data(indio_dev); + int ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_inl\n"); + return ret; + } + + return 0; +} + +static const struct iio_trigger_ops kmx61_trigger_ops = { + .set_trigger_state = kmx61_data_rdy_trigger_set_state, + .try_reenable = kmx61_trig_try_reenable, + .owner = THIS_MODULE, +}; + +static irqreturn_t kmx61_event_handler(int irq, void *private) +{ + struct kmx61_data *data = private; + struct iio_dev *indio_dev = data->acc_indio_dev; + int ret; + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ins1\n"); + goto ack_intr; + } + + if (ret & KMX61_REG_INS1_BIT_WUFS) { + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ins2\n"); + goto ack_intr; + } + + if (ret & KMX61_REG_INS2_BIT_XN) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_X, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + 0); + + if (ret & KMX61_REG_INS2_BIT_XP) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_X, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + 0); + + if (ret & KMX61_REG_INS2_BIT_YN) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Y, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + 0); + + if (ret & KMX61_REG_INS2_BIT_YP) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Y, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + 0); + + if (ret & KMX61_REG_INS2_BIT_ZN) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Z, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + 0); + + if (ret & KMX61_REG_INS2_BIT_ZP) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Z, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + 0); + } + +ack_intr: + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); + if (ret < 0) + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + + ret |= KMX61_REG_CTRL1_BIT_RES; + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); + if (ret < 0) + dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); + + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); + if (ret < 0) + dev_err(&data->client->dev, "Error reading reg_inl\n"); + + return IRQ_HANDLED; +} + +static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private) +{ + struct kmx61_data *data = private; + + if (data->acc_dready_trig_on) + iio_trigger_poll(data->acc_dready_trig); + if (data->mag_dready_trig_on) + iio_trigger_poll(data->mag_dready_trig); + + if (data->motion_trig_on) + iio_trigger_poll(data->motion_trig); + + if (data->ev_enable_state) + return IRQ_WAKE_THREAD; + return IRQ_HANDLED; +} + +static irqreturn_t kmx61_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct kmx61_data *data = kmx61_get_data(indio_dev); + int bit, ret, i = 0; + u8 base; + s16 buffer[8]; + + if (indio_dev == data->acc_indio_dev) + base = KMX61_ACC_XOUT_L; + else + base = KMX61_MAG_XOUT_L; + + mutex_lock(&data->lock); + for_each_set_bit(bit, indio_dev->buffer->scan_mask, + indio_dev->masklength) { + ret = kmx61_read_measurement(data, base, bit); + if (ret < 0) { + mutex_unlock(&data->lock); + goto err; + } + buffer[i++] = ret; + } + mutex_unlock(&data->lock); + + iio_push_to_buffers(indio_dev, buffer); +err: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static const char *kmx61_match_acpi_device(struct device *dev) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return NULL; + return dev_name(dev); +} + +static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data) +{ + struct device *dev; + struct gpio_desc *gpio; + int ret; + + if (!client) + return -EINVAL; + + dev = &client->dev; + + /* data ready gpio interrupt pin */ + gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0); + if (IS_ERR(gpio)) { + dev_err(dev, "acpi gpio get index failed\n"); + return PTR_ERR(gpio); + } + + ret = gpiod_direction_input(gpio); + if (ret) + return ret; + + ret = gpiod_to_irq(gpio); + + dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); + return ret; +} + +static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data, + const struct iio_info *info, + const struct iio_chan_spec *chan, + int num_channels, + const char *name) +{ + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data)); + if (!indio_dev) + return ERR_PTR(-ENOMEM); + + kmx61_set_data(indio_dev, data); + + indio_dev->dev.parent = &data->client->dev; + indio_dev->channels = chan; + indio_dev->num_channels = num_channels; + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = info; + + return indio_dev; +} + +static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data, + struct iio_dev *indio_dev, + const char *tag) +{ + struct iio_trigger *trig; + int ret; + + trig = devm_iio_trigger_alloc(&data->client->dev, + "%s-%s-dev%d", + indio_dev->name, + tag, + indio_dev->id); + if (!trig) + return ERR_PTR(-ENOMEM); + + trig->dev.parent = &data->client->dev; + trig->ops = &kmx61_trigger_ops; + iio_trigger_set_drvdata(trig, indio_dev); + + ret = iio_trigger_register(trig); + if (ret) + return ERR_PTR(ret); + + return trig; +} + +static int kmx61_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct kmx61_data *data; + const char *name = NULL; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + i2c_set_clientdata(client, data); + data->client = client; + + mutex_init(&data->lock); + + if (id) + name = id->name; + else if (ACPI_HANDLE(&client->dev)) + name = kmx61_match_acpi_device(&client->dev); + else + return -ENODEV; + + data->acc_indio_dev = + kmx61_indiodev_setup(data, &kmx61_acc_info, + kmx61_acc_channels, + ARRAY_SIZE(kmx61_acc_channels), + name); + if (IS_ERR(data->acc_indio_dev)) + return PTR_ERR(data->acc_indio_dev); + + data->mag_indio_dev = + kmx61_indiodev_setup(data, &kmx61_mag_info, + kmx61_mag_channels, + ARRAY_SIZE(kmx61_mag_channels), + name); + if (IS_ERR(data->mag_indio_dev)) + return PTR_ERR(data->mag_indio_dev); + + ret = kmx61_chip_init(data); + if (ret < 0) + return ret; + + if (client->irq < 0) + client->irq = kmx61_gpio_probe(client, data); + + if (client->irq >= 0) { + ret = devm_request_threaded_irq(&client->dev, client->irq, + kmx61_data_rdy_trig_poll, + kmx61_event_handler, + IRQF_TRIGGER_RISING, + KMX61_IRQ_NAME, + data); + if (ret) + goto err_chip_uninit; + + data->acc_dready_trig = + kmx61_trigger_setup(data, data->acc_indio_dev, + "dready"); + if (IS_ERR(data->acc_dready_trig)) { + ret = PTR_ERR(data->acc_dready_trig); + goto err_chip_uninit; + } + + data->mag_dready_trig = + kmx61_trigger_setup(data, data->mag_indio_dev, + "dready"); + if (IS_ERR(data->mag_dready_trig)) { + ret = PTR_ERR(data->mag_dready_trig); + goto err_trigger_unregister_acc_dready; + } + + data->motion_trig = + kmx61_trigger_setup(data, data->acc_indio_dev, + "any-motion"); + if (IS_ERR(data->motion_trig)) { + ret = PTR_ERR(data->motion_trig); + goto err_trigger_unregister_mag_dready; + } + + ret = iio_triggered_buffer_setup(data->acc_indio_dev, + &iio_pollfunc_store_time, + kmx61_trigger_handler, + NULL); + if (ret < 0) { + dev_err(&data->client->dev, + "Failed to setup acc triggered buffer\n"); + goto err_trigger_unregister_motion; + } + + ret = iio_triggered_buffer_setup(data->mag_indio_dev, + &iio_pollfunc_store_time, + kmx61_trigger_handler, + NULL); + if (ret < 0) { + dev_err(&data->client->dev, + "Failed to setup mag triggered buffer\n"); + goto err_buffer_cleanup_acc; + } + } + + ret = iio_device_register(data->acc_indio_dev); + if (ret < 0) { + dev_err(&client->dev, "Failed to register acc iio device\n"); + goto err_buffer_cleanup_mag; + } + + ret = iio_device_register(data->mag_indio_dev); + if (ret < 0) { + dev_err(&client->dev, "Failed to register mag iio device\n"); + goto err_iio_unregister_acc; + } + + ret = pm_runtime_set_active(&client->dev); + if (ret < 0) + goto err_iio_unregister_mag; + + pm_runtime_enable(&client->dev); + pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS); + pm_runtime_use_autosuspend(&client->dev); + + return 0; + +err_iio_unregister_mag: + iio_device_unregister(data->mag_indio_dev); +err_iio_unregister_acc: + iio_device_unregister(data->acc_indio_dev); +err_buffer_cleanup_mag: + if (client->irq >= 0) + iio_triggered_buffer_cleanup(data->mag_indio_dev); +err_buffer_cleanup_acc: + if (client->irq >= 0) + iio_triggered_buffer_cleanup(data->acc_indio_dev); +err_trigger_unregister_motion: + iio_trigger_unregister(data->motion_trig); +err_trigger_unregister_mag_dready: + iio_trigger_unregister(data->mag_dready_trig); +err_trigger_unregister_acc_dready: + iio_trigger_unregister(data->acc_dready_trig); +err_chip_uninit: + kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); + return ret; +} + +static int kmx61_remove(struct i2c_client *client) +{ + struct kmx61_data *data = i2c_get_clientdata(client); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + iio_device_unregister(data->acc_indio_dev); + iio_device_unregister(data->mag_indio_dev); + + if (client->irq >= 0) { + iio_triggered_buffer_cleanup(data->acc_indio_dev); + iio_triggered_buffer_cleanup(data->mag_indio_dev); + iio_trigger_unregister(data->acc_dready_trig); + iio_trigger_unregister(data->mag_dready_trig); + iio_trigger_unregister(data->motion_trig); + } + + mutex_lock(&data->lock); + kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); + mutex_unlock(&data->lock); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int kmx61_suspend(struct device *dev) +{ + int ret; + struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); + + mutex_lock(&data->lock); + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, + false); + mutex_unlock(&data->lock); + + return ret; +} + +static int kmx61_resume(struct device *dev) +{ + u8 stby = 0; + struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); + + if (data->acc_stby) + stby |= KMX61_ACC_STBY_BIT; + if (data->mag_stby) + stby |= KMX61_MAG_STBY_BIT; + + return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); +} +#endif + +#ifdef CONFIG_PM +static int kmx61_runtime_suspend(struct device *dev) +{ + struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); + int ret; + + mutex_lock(&data->lock); + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); + mutex_unlock(&data->lock); + + return ret; +} + +static int kmx61_runtime_resume(struct device *dev) +{ + struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); + u8 stby = 0; + + if (!data->acc_ps) + stby |= KMX61_ACC_STBY_BIT; + if (!data->mag_ps) + stby |= KMX61_MAG_STBY_BIT; + + return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); +} +#endif + +static const struct dev_pm_ops kmx61_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume) + SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL) +}; + +static const struct acpi_device_id kmx61_acpi_match[] = { + {"KMX61021", 0}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match); + +static const struct i2c_device_id kmx61_id[] = { + {"kmx611021", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, kmx61_id); + +static struct i2c_driver kmx61_driver = { + .driver = { + .name = KMX61_DRV_NAME, + .acpi_match_table = ACPI_PTR(kmx61_acpi_match), + .pm = &kmx61_pm_ops, + }, + .probe = kmx61_probe, + .remove = kmx61_remove, + .id_table = kmx61_id, +}; + +module_i2c_driver(kmx61_driver); + +MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); +MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index f971f79103ec..71333140d42c 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -178,6 +178,80 @@ static ssize_t iio_scan_el_show(struct device *dev, return sprintf(buf, "%d\n", ret); } +/* Note NULL used as error indicator as it doesn't make sense. */ +static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks, + unsigned int masklength, + const unsigned long *mask) +{ + if (bitmap_empty(mask, masklength)) + return NULL; + while (*av_masks) { + if (bitmap_subset(mask, av_masks, masklength)) + return av_masks; + av_masks += BITS_TO_LONGS(masklength); + } + return NULL; +} + +static bool iio_validate_scan_mask(struct iio_dev *indio_dev, + const unsigned long *mask) +{ + if (!indio_dev->setup_ops->validate_scan_mask) + return true; + + return indio_dev->setup_ops->validate_scan_mask(indio_dev, mask); +} + +/** + * iio_scan_mask_set() - set particular bit in the scan mask + * @indio_dev: the iio device + * @buffer: the buffer whose scan mask we are interested in + * @bit: the bit to be set. + * + * Note that at this point we have no way of knowing what other + * buffers might request, hence this code only verifies that the + * individual buffers request is plausible. + */ +static int iio_scan_mask_set(struct iio_dev *indio_dev, + struct iio_buffer *buffer, int bit) +{ + const unsigned long *mask; + unsigned long *trialmask; + + trialmask = kmalloc(sizeof(*trialmask)* + BITS_TO_LONGS(indio_dev->masklength), + GFP_KERNEL); + + if (trialmask == NULL) + return -ENOMEM; + if (!indio_dev->masklength) { + WARN_ON("Trying to set scanmask prior to registering buffer\n"); + goto err_invalid_mask; + } + bitmap_copy(trialmask, buffer->scan_mask, indio_dev->masklength); + set_bit(bit, trialmask); + + if (!iio_validate_scan_mask(indio_dev, trialmask)) + goto err_invalid_mask; + + if (indio_dev->available_scan_masks) { + mask = iio_scan_mask_match(indio_dev->available_scan_masks, + indio_dev->masklength, + trialmask); + if (!mask) + goto err_invalid_mask; + } + bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength); + + kfree(trialmask); + + return 0; + +err_invalid_mask: + kfree(trialmask); + return -EINVAL; +} + static int iio_scan_mask_clear(struct iio_buffer *buffer, int bit) { clear_bit(bit, buffer->scan_mask); @@ -309,115 +383,19 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, return ret; } -static const char * const iio_scan_elements_group_name = "scan_elements"; - -int iio_buffer_register(struct iio_dev *indio_dev, - const struct iio_chan_spec *channels, - int num_channels) -{ - struct iio_dev_attr *p; - struct attribute **attr; - struct iio_buffer *buffer = indio_dev->buffer; - int ret, i, attrn, attrcount, attrcount_orig = 0; - - if (buffer->attrs) - indio_dev->groups[indio_dev->groupcounter++] = buffer->attrs; - - if (buffer->scan_el_attrs != NULL) { - attr = buffer->scan_el_attrs->attrs; - while (*attr++ != NULL) - attrcount_orig++; - } - attrcount = attrcount_orig; - INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); - if (channels) { - /* new magic */ - for (i = 0; i < num_channels; i++) { - if (channels[i].scan_index < 0) - continue; - - /* Establish necessary mask length */ - if (channels[i].scan_index > - (int)indio_dev->masklength - 1) - indio_dev->masklength - = channels[i].scan_index + 1; - - ret = iio_buffer_add_channel_sysfs(indio_dev, - &channels[i]); - if (ret < 0) - goto error_cleanup_dynamic; - attrcount += ret; - if (channels[i].type == IIO_TIMESTAMP) - indio_dev->scan_index_timestamp = - channels[i].scan_index; - } - if (indio_dev->masklength && buffer->scan_mask == NULL) { - buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), - sizeof(*buffer->scan_mask), - GFP_KERNEL); - if (buffer->scan_mask == NULL) { - ret = -ENOMEM; - goto error_cleanup_dynamic; - } - } - } - - buffer->scan_el_group.name = iio_scan_elements_group_name; - - buffer->scan_el_group.attrs = kcalloc(attrcount + 1, - sizeof(buffer->scan_el_group.attrs[0]), - GFP_KERNEL); - if (buffer->scan_el_group.attrs == NULL) { - ret = -ENOMEM; - goto error_free_scan_mask; - } - if (buffer->scan_el_attrs) - memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs, - sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig); - attrn = attrcount_orig; - - list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l) - buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr; - indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group; - - return 0; - -error_free_scan_mask: - kfree(buffer->scan_mask); -error_cleanup_dynamic: - iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); - - return ret; -} -EXPORT_SYMBOL(iio_buffer_register); - -void iio_buffer_unregister(struct iio_dev *indio_dev) -{ - kfree(indio_dev->buffer->scan_mask); - kfree(indio_dev->buffer->scan_el_group.attrs); - iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); -} -EXPORT_SYMBOL(iio_buffer_unregister); - -ssize_t iio_buffer_read_length(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t iio_buffer_read_length(struct device *dev, + struct device_attribute *attr, + char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; - if (buffer->access->get_length) - return sprintf(buf, "%d\n", - buffer->access->get_length(buffer)); - - return 0; + return sprintf(buf, "%d\n", buffer->length); } -EXPORT_SYMBOL(iio_buffer_read_length); -ssize_t iio_buffer_write_length(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) +static ssize_t iio_buffer_write_length(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; @@ -428,47 +406,28 @@ ssize_t iio_buffer_write_length(struct device *dev, if (ret) return ret; - if (buffer->access->get_length) - if (val == buffer->access->get_length(buffer)) - return len; + if (val == buffer->length) + return len; mutex_lock(&indio_dev->mlock); if (iio_buffer_is_active(indio_dev->buffer)) { ret = -EBUSY; } else { - if (buffer->access->set_length) - buffer->access->set_length(buffer, val); + buffer->access->set_length(buffer, val); ret = 0; } mutex_unlock(&indio_dev->mlock); return ret ? ret : len; } -EXPORT_SYMBOL(iio_buffer_write_length); -ssize_t iio_buffer_show_enable(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t iio_buffer_show_enable(struct device *dev, + struct device_attribute *attr, + char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); return sprintf(buf, "%d\n", iio_buffer_is_active(indio_dev->buffer)); } -EXPORT_SYMBOL(iio_buffer_show_enable); - -/* Note NULL used as error indicator as it doesn't make sense. */ -static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks, - unsigned int masklength, - const unsigned long *mask) -{ - if (bitmap_empty(mask, masklength)) - return NULL; - while (*av_masks) { - if (bitmap_subset(mask, av_masks, masklength)) - return av_masks; - av_masks += BITS_TO_LONGS(masklength); - } - return NULL; -} static int iio_compute_scan_bytes(struct iio_dev *indio_dev, const unsigned long *mask, bool timestamp) @@ -680,6 +639,8 @@ static int __iio_update_buffers(struct iio_dev *indio_dev, indio_dev->currentmode = INDIO_BUFFER_TRIGGERED; } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) { indio_dev->currentmode = INDIO_BUFFER_HARDWARE; + } else if (indio_dev->modes & INDIO_BUFFER_SOFTWARE) { + indio_dev->currentmode = INDIO_BUFFER_SOFTWARE; } else { /* Should never be reached */ ret = -EINVAL; goto error_run_postdisable; @@ -755,10 +716,10 @@ out_unlock: } EXPORT_SYMBOL_GPL(iio_update_buffers); -ssize_t iio_buffer_store_enable(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) +static ssize_t iio_buffer_store_enable(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) { int ret; bool requested_state; @@ -790,83 +751,146 @@ done: mutex_unlock(&indio_dev->mlock); return (ret < 0) ? ret : len; } -EXPORT_SYMBOL(iio_buffer_store_enable); -/** - * iio_validate_scan_mask_onehot() - Validates that exactly one channel is selected - * @indio_dev: the iio device - * @mask: scan mask to be checked - * - * Return true if exactly one bit is set in the scan mask, false otherwise. It - * can be used for devices where only one channel can be active for sampling at - * a time. - */ -bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, - const unsigned long *mask) -{ - return bitmap_weight(mask, indio_dev->masklength) == 1; -} -EXPORT_SYMBOL_GPL(iio_validate_scan_mask_onehot); - -static bool iio_validate_scan_mask(struct iio_dev *indio_dev, - const unsigned long *mask) -{ - if (!indio_dev->setup_ops->validate_scan_mask) - return true; +static const char * const iio_scan_elements_group_name = "scan_elements"; - return indio_dev->setup_ops->validate_scan_mask(indio_dev, mask); -} +static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length, + iio_buffer_write_length); +static struct device_attribute dev_attr_length_ro = __ATTR(length, + S_IRUGO, iio_buffer_read_length, NULL); +static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, + iio_buffer_show_enable, iio_buffer_store_enable); -/** - * iio_scan_mask_set() - set particular bit in the scan mask - * @indio_dev: the iio device - * @buffer: the buffer whose scan mask we are interested in - * @bit: the bit to be set. - * - * Note that at this point we have no way of knowing what other - * buffers might request, hence this code only verifies that the - * individual buffers request is plausible. - */ -int iio_scan_mask_set(struct iio_dev *indio_dev, - struct iio_buffer *buffer, int bit) +int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) { - const unsigned long *mask; - unsigned long *trialmask; + struct iio_dev_attr *p; + struct attribute **attr; + struct iio_buffer *buffer = indio_dev->buffer; + int ret, i, attrn, attrcount, attrcount_orig = 0; + const struct iio_chan_spec *channels; - trialmask = kmalloc(sizeof(*trialmask)* - BITS_TO_LONGS(indio_dev->masklength), - GFP_KERNEL); + if (!buffer) + return 0; - if (trialmask == NULL) + attrcount = 0; + if (buffer->attrs) { + while (buffer->attrs[attrcount] != NULL) + attrcount++; + } + + buffer->buffer_group.name = "buffer"; + buffer->buffer_group.attrs = kcalloc(attrcount + 3, + sizeof(*buffer->buffer_group.attrs), GFP_KERNEL); + if (!buffer->buffer_group.attrs) return -ENOMEM; - if (!indio_dev->masklength) { - WARN_ON("Trying to set scanmask prior to registering buffer\n"); - goto err_invalid_mask; + + if (buffer->access->set_length) + buffer->buffer_group.attrs[0] = &dev_attr_length.attr; + else + buffer->buffer_group.attrs[0] = &dev_attr_length_ro.attr; + buffer->buffer_group.attrs[1] = &dev_attr_enable.attr; + if (buffer->attrs) + memcpy(&buffer->buffer_group.attrs[2], buffer->attrs, + sizeof(*&buffer->buffer_group.attrs) * attrcount); + buffer->buffer_group.attrs[attrcount+2] = NULL; + + indio_dev->groups[indio_dev->groupcounter++] = &buffer->buffer_group; + + if (buffer->scan_el_attrs != NULL) { + attr = buffer->scan_el_attrs->attrs; + while (*attr++ != NULL) + attrcount_orig++; } - bitmap_copy(trialmask, buffer->scan_mask, indio_dev->masklength); - set_bit(bit, trialmask); + attrcount = attrcount_orig; + INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); + channels = indio_dev->channels; + if (channels) { + /* new magic */ + for (i = 0; i < indio_dev->num_channels; i++) { + if (channels[i].scan_index < 0) + continue; - if (!iio_validate_scan_mask(indio_dev, trialmask)) - goto err_invalid_mask; + /* Establish necessary mask length */ + if (channels[i].scan_index > + (int)indio_dev->masklength - 1) + indio_dev->masklength + = channels[i].scan_index + 1; - if (indio_dev->available_scan_masks) { - mask = iio_scan_mask_match(indio_dev->available_scan_masks, - indio_dev->masklength, - trialmask); - if (!mask) - goto err_invalid_mask; + ret = iio_buffer_add_channel_sysfs(indio_dev, + &channels[i]); + if (ret < 0) + goto error_cleanup_dynamic; + attrcount += ret; + if (channels[i].type == IIO_TIMESTAMP) + indio_dev->scan_index_timestamp = + channels[i].scan_index; + } + if (indio_dev->masklength && buffer->scan_mask == NULL) { + buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), + sizeof(*buffer->scan_mask), + GFP_KERNEL); + if (buffer->scan_mask == NULL) { + ret = -ENOMEM; + goto error_cleanup_dynamic; + } + } } - bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength); - kfree(trialmask); + buffer->scan_el_group.name = iio_scan_elements_group_name; + + buffer->scan_el_group.attrs = kcalloc(attrcount + 1, + sizeof(buffer->scan_el_group.attrs[0]), + GFP_KERNEL); + if (buffer->scan_el_group.attrs == NULL) { + ret = -ENOMEM; + goto error_free_scan_mask; + } + if (buffer->scan_el_attrs) + memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs, + sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig); + attrn = attrcount_orig; + + list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l) + buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr; + indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group; return 0; -err_invalid_mask: - kfree(trialmask); - return -EINVAL; +error_free_scan_mask: + kfree(buffer->scan_mask); +error_cleanup_dynamic: + iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); + kfree(indio_dev->buffer->buffer_group.attrs); + + return ret; +} + +void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) +{ + if (!indio_dev->buffer) + return; + + kfree(indio_dev->buffer->scan_mask); + kfree(indio_dev->buffer->buffer_group.attrs); + kfree(indio_dev->buffer->scan_el_group.attrs); + iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); +} + +/** + * iio_validate_scan_mask_onehot() - Validates that exactly one channel is selected + * @indio_dev: the iio device + * @mask: scan mask to be checked + * + * Return true if exactly one bit is set in the scan mask, false otherwise. It + * can be used for devices where only one channel can be active for sampling at + * a time. + */ +bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, + const unsigned long *mask) +{ + return bitmap_weight(mask, indio_dev->masklength) == 1; } -EXPORT_SYMBOL_GPL(iio_scan_mask_set); +EXPORT_SYMBOL_GPL(iio_validate_scan_mask_onehot); int iio_scan_mask_query(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index af3e76d652ba..aaba9d3d980e 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -70,6 +70,11 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_CCT] = "cct", [IIO_PRESSURE] = "pressure", [IIO_HUMIDITYRELATIVE] = "humidityrelative", + [IIO_ACTIVITY] = "activity", + [IIO_STEPS] = "steps", + [IIO_ENERGY] = "energy", + [IIO_DISTANCE] = "distance", + [IIO_VELOCITY] = "velocity", }; static const char * const iio_modifier_names[] = { @@ -91,6 +96,11 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_NORTH_TRUE] = "from_north_true", [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp", [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp", + [IIO_MOD_RUNNING] = "running", + [IIO_MOD_JOGGING] = "jogging", + [IIO_MOD_WALKING] = "walking", + [IIO_MOD_STILL] = "still", + [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)", }; /* relies on pairs of these shared then separate */ @@ -113,6 +123,11 @@ static const char * const iio_chan_info_postfix[] = { [IIO_CHAN_INFO_HARDWAREGAIN] = "hardwaregain", [IIO_CHAN_INFO_HYSTERESIS] = "hysteresis", [IIO_CHAN_INFO_INT_TIME] = "integration_time", + [IIO_CHAN_INFO_ENABLE] = "en", + [IIO_CHAN_INFO_CALIBHEIGHT] = "calibheight", + [IIO_CHAN_INFO_CALIBWEIGHT] = "calibweight", + [IIO_CHAN_INFO_DEBOUNCE_COUNT] = "debounce_count", + [IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time", }; /** @@ -1035,7 +1050,6 @@ struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv) if (!ptr) return NULL; - /* use raw alloc_dr for kmalloc caller tracing */ iio_dev = iio_device_alloc(sizeof_priv); if (iio_dev) { *ptr = iio_dev; @@ -1127,6 +1141,29 @@ static const struct file_operations iio_buffer_fileops = { .compat_ioctl = iio_ioctl, }; +static int iio_check_unique_scan_index(struct iio_dev *indio_dev) +{ + int i, j; + const struct iio_chan_spec *channels = indio_dev->channels; + + if (!(indio_dev->modes & INDIO_ALL_BUFFER_MODES)) + return 0; + + for (i = 0; i < indio_dev->num_channels - 1; i++) { + if (channels[i].scan_index < 0) + continue; + for (j = i + 1; j < indio_dev->num_channels; j++) + if (channels[i].scan_index == channels[j].scan_index) { + dev_err(&indio_dev->dev, + "Duplicate scan index %d\n", + channels[i].scan_index); + return -EINVAL; + } + } + + return 0; +} + static const struct iio_buffer_setup_ops noop_ring_setup_ops; /** @@ -1141,6 +1178,10 @@ int iio_device_register(struct iio_dev *indio_dev) if (!indio_dev->dev.of_node && indio_dev->dev.parent) indio_dev->dev.of_node = indio_dev->dev.parent->of_node; + ret = iio_check_unique_scan_index(indio_dev); + if (ret < 0) + return ret; + /* configure elements for the chrdev */ indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), indio_dev->id); @@ -1150,11 +1191,19 @@ int iio_device_register(struct iio_dev *indio_dev) "Failed to register debugfs interfaces\n"); return ret; } + + ret = iio_buffer_alloc_sysfs_and_mask(indio_dev); + if (ret) { + dev_err(indio_dev->dev.parent, + "Failed to create buffer sysfs interfaces\n"); + goto error_unreg_debugfs; + } + ret = iio_device_register_sysfs(indio_dev); if (ret) { dev_err(indio_dev->dev.parent, "Failed to register sysfs interfaces\n"); - goto error_unreg_debugfs; + goto error_buffer_free_sysfs; } ret = iio_device_register_eventset(indio_dev); if (ret) { @@ -1187,6 +1236,8 @@ error_unreg_eventset: iio_device_unregister_eventset(indio_dev); error_free_sysfs: iio_device_unregister_sysfs(indio_dev); +error_buffer_free_sysfs: + iio_buffer_free_sysfs_and_mask(indio_dev); error_unreg_debugfs: iio_device_unregister_debugfs(indio_dev); return ret; @@ -1215,6 +1266,8 @@ void iio_device_unregister(struct iio_dev *indio_dev) iio_buffer_wakeup_poll(indio_dev); mutex_unlock(&indio_dev->info_exist_lock); + + iio_buffer_free_sysfs_and_mask(indio_dev); } EXPORT_SYMBOL(iio_device_unregister); diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 0c1e37e3120a..a4b397048f71 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -197,6 +197,7 @@ static const char * const iio_ev_type_text[] = { [IIO_EV_TYPE_ROC] = "roc", [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", + [IIO_EV_TYPE_CHANGE] = "change", }; static const char * const iio_ev_dir_text[] = { @@ -327,9 +328,15 @@ static int iio_device_add_event(struct iio_dev *indio_dev, for_each_set_bit(i, mask, sizeof(*mask)*8) { if (i >= ARRAY_SIZE(iio_ev_info_text)) return -EINVAL; - postfix = kasprintf(GFP_KERNEL, "%s_%s_%s", - iio_ev_type_text[type], iio_ev_dir_text[dir], - iio_ev_info_text[i]); + if (dir != IIO_EV_DIR_NONE) + postfix = kasprintf(GFP_KERNEL, "%s_%s_%s", + iio_ev_type_text[type], + iio_ev_dir_text[dir], + iio_ev_info_text[i]); + else + postfix = kasprintf(GFP_KERNEL, "%s_%s", + iio_ev_type_text[type], + iio_ev_info_text[i]); if (postfix == NULL) return -ENOMEM; @@ -404,7 +411,7 @@ static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev) { int j, ret, attrcount = 0; - /* Dynically created from the channels array */ + /* Dynamically created from the channels array */ for (j = 0; j < indio_dev->num_channels; j++) { ret = iio_device_add_event_sysfs(indio_dev, &indio_dev->channels[j]); diff --git a/drivers/iio/industrialio-triggered-buffer.c b/drivers/iio/industrialio-triggered-buffer.c index d6f54930b34a..15a5341b5e7b 100644 --- a/drivers/iio/industrialio-triggered-buffer.c +++ b/drivers/iio/industrialio-triggered-buffer.c @@ -32,7 +32,7 @@ static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { * * This function combines some common tasks which will normally be performed * when setting up a triggered buffer. It will allocate the buffer and the - * pollfunc, as well as register the buffer with the IIO core. + * pollfunc. * * Before calling this function the indio_dev structure should already be * completely initialized, but not yet registered. In practice this means that @@ -49,7 +49,7 @@ int iio_triggered_buffer_setup(struct iio_dev *indio_dev, struct iio_buffer *buffer; int ret; - buffer = iio_kfifo_allocate(indio_dev); + buffer = iio_kfifo_allocate(); if (!buffer) { ret = -ENOMEM; goto error_ret; @@ -78,16 +78,8 @@ int iio_triggered_buffer_setup(struct iio_dev *indio_dev, /* Flag that polled ring buffering is possible */ indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - ret = iio_buffer_register(indio_dev, - indio_dev->channels, - indio_dev->num_channels); - if (ret) - goto error_dealloc_pollfunc; - return 0; -error_dealloc_pollfunc: - iio_dealloc_pollfunc(indio_dev->pollfunc); error_kfifo_free: iio_kfifo_free(indio_dev->buffer); error_ret: @@ -101,7 +93,6 @@ EXPORT_SYMBOL(iio_triggered_buffer_setup); */ void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev) { - iio_buffer_unregister(indio_dev); iio_dealloc_pollfunc(indio_dev->pollfunc); iio_kfifo_free(indio_dev->buffer); } diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 90c8cb727cc7..c8bad3cf891d 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -116,8 +116,11 @@ static int __of_iio_simple_xlate(struct iio_dev *indio_dev, if (!iiospec->args_count) return 0; - if (iiospec->args[0] >= indio_dev->num_channels) + if (iiospec->args[0] >= indio_dev->num_channels) { + dev_err(&indio_dev->dev, "invalid channel index %u\n", + iiospec->args[0]); return -EINVAL; + } return iiospec->args[0]; } @@ -634,3 +637,28 @@ err_unlock: return ret; } EXPORT_SYMBOL_GPL(iio_get_channel_type); + +static int iio_channel_write(struct iio_channel *chan, int val, int val2, + enum iio_chan_info_enum info) +{ + return chan->indio_dev->info->write_raw(chan->indio_dev, + chan->channel, val, val2, info); +} + +int iio_write_channel_raw(struct iio_channel *chan, int val) +{ + int ret; + + mutex_lock(&chan->indio_dev->info_exist_lock); + if (chan->indio_dev->info == NULL) { + ret = -ENODEV; + goto err_unlock; + } + + ret = iio_channel_write(chan, val, 0, IIO_CHAN_INFO_RAW); +err_unlock: + mutex_unlock(&chan->indio_dev->info_exist_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(iio_write_channel_raw); diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 7134e8ada09a..b2beea01c49b 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -47,30 +47,6 @@ static int iio_request_update_kfifo(struct iio_buffer *r) return ret; } -static int iio_get_length_kfifo(struct iio_buffer *r) -{ - return r->length; -} - -static IIO_BUFFER_ENABLE_ATTR; -static IIO_BUFFER_LENGTH_ATTR; - -static struct attribute *iio_kfifo_attributes[] = { - &dev_attr_length.attr, - &dev_attr_enable.attr, - NULL, -}; - -static struct attribute_group iio_kfifo_attribute_group = { - .attrs = iio_kfifo_attributes, - .name = "buffer", -}; - -static int iio_get_bytes_per_datum_kfifo(struct iio_buffer *r) -{ - return r->bytes_per_datum; -} - static int iio_mark_update_needed_kfifo(struct iio_buffer *r) { struct iio_kfifo *kf = iio_to_kfifo(r); @@ -159,26 +135,25 @@ static const struct iio_buffer_access_funcs kfifo_access_funcs = { .read_first_n = &iio_read_first_n_kfifo, .data_available = iio_kfifo_buf_data_available, .request_update = &iio_request_update_kfifo, - .get_bytes_per_datum = &iio_get_bytes_per_datum_kfifo, .set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo, - .get_length = &iio_get_length_kfifo, .set_length = &iio_set_length_kfifo, .release = &iio_kfifo_buffer_release, }; -struct iio_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev) +struct iio_buffer *iio_kfifo_allocate(void) { struct iio_kfifo *kf; - kf = kzalloc(sizeof *kf, GFP_KERNEL); + kf = kzalloc(sizeof(*kf), GFP_KERNEL); if (!kf) return NULL; + kf->update_needed = true; iio_buffer_init(&kf->buffer); - kf->buffer.attrs = &iio_kfifo_attribute_group; kf->buffer.access = &kfifo_access_funcs; kf->buffer.length = 2; mutex_init(&kf->user_lock); + return &kf->buffer; } EXPORT_SYMBOL(iio_kfifo_allocate); @@ -189,4 +164,58 @@ void iio_kfifo_free(struct iio_buffer *r) } EXPORT_SYMBOL(iio_kfifo_free); +static void devm_iio_kfifo_release(struct device *dev, void *res) +{ + iio_kfifo_free(*(struct iio_buffer **)res); +} + +static int devm_iio_kfifo_match(struct device *dev, void *res, void *data) +{ + struct iio_buffer **r = res; + + if (WARN_ON(!r || !*r)) + return 0; + + return *r == data; +} + +/** + * devm_iio_fifo_allocate - Resource-managed iio_kfifo_allocate() + * @dev: Device to allocate kfifo buffer for + * + * RETURNS: + * Pointer to allocated iio_buffer on success, NULL on failure. + */ +struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev) +{ + struct iio_buffer **ptr, *r; + + ptr = devres_alloc(devm_iio_kfifo_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return NULL; + + r = iio_kfifo_allocate(); + if (r) { + *ptr = r; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return r; +} +EXPORT_SYMBOL(devm_iio_kfifo_allocate); + +/** + * devm_iio_fifo_free - Resource-managed iio_kfifo_free() + * @dev: Device the buffer belongs to + * @r: The buffer associated with the device + */ +void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r) +{ + WARN_ON(devres_release(dev, devm_iio_kfifo_release, + devm_iio_kfifo_match, r)); +} +EXPORT_SYMBOL(devm_iio_kfifo_free); + MODULE_LICENSE("GPL"); diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 5bea821adcae..ae68c64bdad3 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -48,6 +48,17 @@ config CM32181 To compile this driver as a module, choose M here: the module will be called cm32181. +config CM3232 + depends on I2C + tristate "CM3232 ambient light sensor" + help + Say Y here if you use cm3232. + This option enables ambient light sensor using + Capella Microsystems cm3232 device driver. + + To compile this driver as a module, choose M here: + the module will be called cm3232. + config CM36651 depends on I2C tristate "CM36651 driver" @@ -95,6 +106,9 @@ config HID_SENSOR_ALS Say yes here to build support for the HID SENSOR Ambient light sensor. + To compile this driver as a module, choose M here: the + module will be called hid-sensor-als. + config HID_SENSOR_PROX depends on HID_SENSOR_HUB select IIO_BUFFER @@ -109,6 +123,16 @@ config HID_SENSOR_PROX To compile this driver as a module, choose M here: the module will be called hid-sensor-prox. +config JSA1212 + tristate "JSA1212 ALS and proximity sensor driver" + depends on I2C + help + Say Y here if you want to build a IIO driver for JSA1212 + proximity & ALS sensor device. + + To compile this driver as a module, choose M here: + the module will be called jsa1212. + config SENSORS_LM3533 tristate "LM3533 ambient light sensor" depends on MFD_LM3533 diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 47877a36cc12..b12a5160d9e0 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -7,11 +7,13 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o obj-$(CONFIG_AL3320A) += al3320a.o obj-$(CONFIG_APDS9300) += apds9300.o obj-$(CONFIG_CM32181) += cm32181.o +obj-$(CONFIG_CM3232) += cm3232.o obj-$(CONFIG_CM36651) += cm36651.o obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o obj-$(CONFIG_ISL29125) += isl29125.o +obj-$(CONFIG_JSA1212) += jsa1212.o obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o obj-$(CONFIG_LTR501) += ltr501.o obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index ad36b294e4d5..5d12ae54d088 100644 --- a/drivers/iio/light/cm32181.c +++ b/drivers/iio/light/cm32181.c @@ -169,7 +169,7 @@ static int cm32181_write_als_it(struct cm32181_chip *cm32181, int val) * @cm32181: pointer of struct cm32181. * * Convert sensor raw data to lux. It depends on integration - * time and claibscale variable. + * time and calibscale variable. * * Return: Positive value is lux, otherwise is error code. */ diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c new file mode 100644 index 000000000000..90e3519a91de --- /dev/null +++ b/drivers/iio/light/cm3232.c @@ -0,0 +1,403 @@ +/* + * CM3232 Ambient Light Sensor + * + * Copyright (C) 2014-2015 Capella Microsystems Inc. + * Author: Kevin Tsai <ktsai@capellamicro.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2, as published + * by the Free Software Foundation. + * + * IIO driver for CM3232 (7-bit I2C slave address 0x10). + */ + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/init.h> + +/* Registers Address */ +#define CM3232_REG_ADDR_CMD 0x00 +#define CM3232_REG_ADDR_ALS 0x50 +#define CM3232_REG_ADDR_ID 0x53 + +#define CM3232_CMD_ALS_DISABLE BIT(0) + +#define CM3232_CMD_ALS_IT_SHIFT 2 +#define CM3232_CMD_ALS_IT_MASK (BIT(2) | BIT(3) | BIT(4)) +#define CM3232_CMD_ALS_IT_DEFAULT (0x01 << CM3232_CMD_ALS_IT_SHIFT) + +#define CM3232_CMD_ALS_RESET BIT(6) + +#define CM3232_CMD_DEFAULT CM3232_CMD_ALS_IT_DEFAULT + +#define CM3232_HW_ID 0x32 +#define CM3232_CALIBSCALE_DEFAULT 100000 +#define CM3232_CALIBSCALE_RESOLUTION 100000 +#define CM3232_MLUX_PER_LUX 1000 + +#define CM3232_MLUX_PER_BIT_DEFAULT 64 +#define CM3232_MLUX_PER_BIT_BASE_IT 100000 + +static const struct { + int val; + int val2; + u8 it; +} cm3232_als_it_scales[] = { + {0, 100000, 0}, /* 0.100000 */ + {0, 200000, 1}, /* 0.200000 */ + {0, 400000, 2}, /* 0.400000 */ + {0, 800000, 3}, /* 0.800000 */ + {1, 600000, 4}, /* 1.600000 */ + {3, 200000, 5}, /* 3.200000 */ +}; + +struct cm3232_als_info { + u8 regs_cmd_default; + u8 hw_id; + int calibscale; + int mlux_per_bit; + int mlux_per_bit_base_it; +}; + +static struct cm3232_als_info cm3232_als_info_default = { + .regs_cmd_default = CM3232_CMD_DEFAULT, + .hw_id = CM3232_HW_ID, + .calibscale = CM3232_CALIBSCALE_DEFAULT, + .mlux_per_bit = CM3232_MLUX_PER_BIT_DEFAULT, + .mlux_per_bit_base_it = CM3232_MLUX_PER_BIT_BASE_IT, +}; + +struct cm3232_chip { + struct i2c_client *client; + struct cm3232_als_info *als_info; + u8 regs_cmd; + u16 regs_als; +}; + +/** + * cm3232_reg_init() - Initialize CM3232 + * @chip: pointer of struct cm3232_chip. + * + * Check and initialize CM3232 ambient light sensor. + * + * Return: 0 for success; otherwise for error code. + */ +static int cm3232_reg_init(struct cm3232_chip *chip) +{ + struct i2c_client *client = chip->client; + s32 ret; + + chip->als_info = &cm3232_als_info_default; + + /* Identify device */ + ret = i2c_smbus_read_word_data(client, CM3232_REG_ADDR_ID); + if (ret < 0) { + dev_err(&chip->client->dev, "Error reading addr_id\n"); + return ret; + } + + if ((ret & 0xFF) != chip->als_info->hw_id) + return -ENODEV; + + /* Disable and reset device */ + chip->regs_cmd = CM3232_CMD_ALS_DISABLE | CM3232_CMD_ALS_RESET; + ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD, + chip->regs_cmd); + if (ret < 0) { + dev_err(&chip->client->dev, "Error writing reg_cmd\n"); + return ret; + } + + /* Register default value */ + chip->regs_cmd = chip->als_info->regs_cmd_default; + + /* Configure register */ + ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD, + chip->regs_cmd); + if (ret < 0) + dev_err(&chip->client->dev, "Error writing reg_cmd\n"); + + return 0; +} + +/** + * cm3232_read_als_it() - Get sensor integration time + * @chip: pointer of struct cm3232_chip + * @val: pointer of int to load the integration (sec). + * @val2: pointer of int to load the integration time (microsecond). + * + * Report the current integration time. + * + * Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL. + */ +static int cm3232_read_als_it(struct cm3232_chip *chip, int *val, int *val2) +{ + u16 als_it; + int i; + + als_it = chip->regs_cmd; + als_it &= CM3232_CMD_ALS_IT_MASK; + als_it >>= CM3232_CMD_ALS_IT_SHIFT; + for (i = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++) { + if (als_it == cm3232_als_it_scales[i].it) { + *val = cm3232_als_it_scales[i].val; + *val2 = cm3232_als_it_scales[i].val2; + return IIO_VAL_INT_PLUS_MICRO; + } + } + + return -EINVAL; +} + +/** + * cm3232_write_als_it() - Write sensor integration time + * @chip: pointer of struct cm3232_chip. + * @val: integration time in second. + * @val2: integration time in microsecond. + * + * Convert integration time to sensor value. + * + * Return: i2c_smbus_write_byte_data command return value. + */ +static int cm3232_write_als_it(struct cm3232_chip *chip, int val, int val2) +{ + struct i2c_client *client = chip->client; + u16 als_it, cmd; + int i; + s32 ret; + + for (i = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++) { + if (val == cm3232_als_it_scales[i].val && + val2 == cm3232_als_it_scales[i].val2) { + + als_it = cm3232_als_it_scales[i].it; + als_it <<= CM3232_CMD_ALS_IT_SHIFT; + + cmd = chip->regs_cmd & ~CM3232_CMD_ALS_IT_MASK; + cmd |= als_it; + ret = i2c_smbus_write_byte_data(client, + CM3232_REG_ADDR_CMD, + cmd); + if (ret < 0) + return ret; + chip->regs_cmd = cmd; + return 0; + } + } + return -EINVAL; +} + +/** + * cm3232_get_lux() - report current lux value + * @chip: pointer of struct cm3232_chip. + * + * Convert sensor data to lux. It depends on integration + * time and calibscale variable. + * + * Return: Zero or positive value is lux, otherwise error code. + */ +static int cm3232_get_lux(struct cm3232_chip *chip) +{ + struct i2c_client *client = chip->client; + struct cm3232_als_info *als_info = chip->als_info; + int ret; + int val, val2; + int als_it; + u64 lux; + + /* Calculate mlux per bit based on als_it */ + ret = cm3232_read_als_it(chip, &val, &val2); + if (ret < 0) + return -EINVAL; + als_it = val * 1000000 + val2; + lux = (__force u64)als_info->mlux_per_bit; + lux *= als_info->mlux_per_bit_base_it; + lux = div_u64(lux, als_it); + + ret = i2c_smbus_read_word_data(client, CM3232_REG_ADDR_ALS); + if (ret < 0) { + dev_err(&client->dev, "Error reading reg_addr_als\n"); + return ret; + } + + chip->regs_als = (u16)ret; + lux *= chip->regs_als; + lux *= als_info->calibscale; + lux = div_u64(lux, CM3232_CALIBSCALE_RESOLUTION); + lux = div_u64(lux, CM3232_MLUX_PER_LUX); + + if (lux > 0xFFFF) + lux = 0xFFFF; + + return (int)lux; +} + +static int cm3232_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct cm3232_chip *chip = iio_priv(indio_dev); + struct cm3232_als_info *als_info = chip->als_info; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + ret = cm3232_get_lux(chip); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + *val = als_info->calibscale; + return IIO_VAL_INT; + case IIO_CHAN_INFO_INT_TIME: + return cm3232_read_als_it(chip, val, val2); + } + + return -EINVAL; +} + +static int cm3232_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct cm3232_chip *chip = iio_priv(indio_dev); + struct cm3232_als_info *als_info = chip->als_info; + + switch (mask) { + case IIO_CHAN_INFO_CALIBSCALE: + als_info->calibscale = val; + return 0; + case IIO_CHAN_INFO_INT_TIME: + return cm3232_write_als_it(chip, val, val2); + } + + return -EINVAL; +} + +/** + * cm3232_get_it_available() - Get available ALS IT value + * @dev: pointer of struct device. + * @attr: pointer of struct device_attribute. + * @buf: pointer of return string buffer. + * + * Display the available integration time in second. + * + * Return: string length. + */ +static ssize_t cm3232_get_it_available(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int i, len; + + for (i = 0, len = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++) + len += scnprintf(buf + len, PAGE_SIZE - len, "%u.%06u ", + cm3232_als_it_scales[i].val, + cm3232_als_it_scales[i].val2); + return len + scnprintf(buf + len, PAGE_SIZE - len, "\n"); +} + +static const struct iio_chan_spec cm3232_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = + BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_CALIBSCALE) | + BIT(IIO_CHAN_INFO_INT_TIME), + } +}; + +static IIO_DEVICE_ATTR(in_illuminance_integration_time_available, + S_IRUGO, cm3232_get_it_available, NULL, 0); + +static struct attribute *cm3232_attributes[] = { + &iio_dev_attr_in_illuminance_integration_time_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group cm3232_attribute_group = { + .attrs = cm3232_attributes +}; + +static const struct iio_info cm3232_info = { + .driver_module = THIS_MODULE, + .read_raw = &cm3232_read_raw, + .write_raw = &cm3232_write_raw, + .attrs = &cm3232_attribute_group, +}; + +static int cm3232_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct cm3232_chip *chip; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + chip->client = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->channels = cm3232_channels; + indio_dev->num_channels = ARRAY_SIZE(cm3232_channels); + indio_dev->info = &cm3232_info; + indio_dev->name = id->name; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = cm3232_reg_init(chip); + if (ret) { + dev_err(&client->dev, + "%s: register init failed\n", + __func__); + return ret; + } + + return iio_device_register(indio_dev); +} + +static int cm3232_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD, + CM3232_CMD_ALS_DISABLE); + + iio_device_unregister(indio_dev); + + return 0; +} + +static const struct i2c_device_id cm3232_id[] = { + {"cm3232", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, cm3232_id); + +static const struct of_device_id cm3232_of_match[] = { + {.compatible = "capella,cm3232"}, + {} +}; + +static struct i2c_driver cm3232_driver = { + .driver = { + .name = "cm3232", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(cm3232_of_match), + }, + .id_table = cm3232_id, + .probe = cm3232_probe, + .remove = cm3232_remove, +}; + +module_i2c_driver(cm3232_driver); + +MODULE_AUTHOR("Kevin Tsai <ktsai@capellamicro.com>"); +MODULE_DESCRIPTION("CM3232 ambient light sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c index 321862da626b..1609ecdd01b0 100644 --- a/drivers/iio/light/hid-sensor-als.c +++ b/drivers/iio/light/hid-sensor-als.c @@ -80,7 +80,6 @@ static int als_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; @@ -97,15 +96,8 @@ static int als_read_raw(struct iio_dev *indio_dev, break; } if (report_id >= 0) { - poll_value = hid_sensor_read_poll_value( - &als_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&als_state->common_attributes, true); - msleep_interruptible(poll_value * 2); - *val = sensor_hub_input_attr_get_raw_value( als_state->common_attributes.hsdev, HID_USAGE_SENSOR_ALS, address, @@ -382,6 +374,7 @@ static struct platform_driver hid_als_platform_driver = { .id_table = hid_als_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_als_probe, .remove = hid_als_remove, diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c index db9c60e47276..91ecc46ffeaa 100644 --- a/drivers/iio/light/hid-sensor-prox.c +++ b/drivers/iio/light/hid-sensor-prox.c @@ -75,7 +75,6 @@ static int prox_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; @@ -92,16 +91,8 @@ static int prox_read_raw(struct iio_dev *indio_dev, break; } if (report_id >= 0) { - poll_value = hid_sensor_read_poll_value( - &prox_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&prox_state->common_attributes, true); - - msleep_interruptible(poll_value * 2); - *val = sensor_hub_input_attr_get_raw_value( prox_state->common_attributes.hsdev, HID_USAGE_SENSOR_PROX, address, @@ -374,6 +365,7 @@ static struct platform_driver hid_prox_platform_driver = { .id_table = hid_prox_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_prox_probe, .remove = hid_prox_remove, diff --git a/drivers/iio/light/jsa1212.c b/drivers/iio/light/jsa1212.c new file mode 100644 index 000000000000..29de7e7d9562 --- /dev/null +++ b/drivers/iio/light/jsa1212.c @@ -0,0 +1,471 @@ +/* + * JSA1212 Ambient Light & Proximity Sensor Driver + * + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD) + * + * TODO: Interrupt support, thresholds, range support. + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/mutex.h> +#include <linux/acpi.h> +#include <linux/regmap.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +/* JSA1212 reg address */ +#define JSA1212_CONF_REG 0x01 +#define JSA1212_INT_REG 0x02 +#define JSA1212_PXS_LT_REG 0x03 +#define JSA1212_PXS_HT_REG 0x04 +#define JSA1212_ALS_TH1_REG 0x05 +#define JSA1212_ALS_TH2_REG 0x06 +#define JSA1212_ALS_TH3_REG 0x07 +#define JSA1212_PXS_DATA_REG 0x08 +#define JSA1212_ALS_DT1_REG 0x09 +#define JSA1212_ALS_DT2_REG 0x0A +#define JSA1212_ALS_RNG_REG 0x0B +#define JSA1212_MAX_REG 0x0C + +/* JSA1212 reg masks */ +#define JSA1212_CONF_MASK 0xFF +#define JSA1212_INT_MASK 0xFF +#define JSA1212_PXS_LT_MASK 0xFF +#define JSA1212_PXS_HT_MASK 0xFF +#define JSA1212_ALS_TH1_MASK 0xFF +#define JSA1212_ALS_TH2_LT_MASK 0x0F +#define JSA1212_ALS_TH2_HT_MASK 0xF0 +#define JSA1212_ALS_TH3_MASK 0xFF +#define JSA1212_PXS_DATA_MASK 0xFF +#define JSA1212_ALS_DATA_MASK 0x0FFF +#define JSA1212_ALS_DT1_MASK 0xFF +#define JSA1212_ALS_DT2_MASK 0x0F +#define JSA1212_ALS_RNG_MASK 0x07 + +/* JSA1212 CONF REG bits */ +#define JSA1212_CONF_PXS_MASK 0x80 +#define JSA1212_CONF_PXS_ENABLE 0x80 +#define JSA1212_CONF_PXS_DISABLE 0x00 +#define JSA1212_CONF_ALS_MASK 0x04 +#define JSA1212_CONF_ALS_ENABLE 0x04 +#define JSA1212_CONF_ALS_DISABLE 0x00 +#define JSA1212_CONF_IRDR_MASK 0x08 +/* Proxmity sensing IRDR current sink settings */ +#define JSA1212_CONF_IRDR_200MA 0x08 +#define JSA1212_CONF_IRDR_100MA 0x00 +#define JSA1212_CONF_PXS_SLP_MASK 0x70 +#define JSA1212_CONF_PXS_SLP_0MS 0x70 +#define JSA1212_CONF_PXS_SLP_12MS 0x60 +#define JSA1212_CONF_PXS_SLP_50MS 0x50 +#define JSA1212_CONF_PXS_SLP_75MS 0x40 +#define JSA1212_CONF_PXS_SLP_100MS 0x30 +#define JSA1212_CONF_PXS_SLP_200MS 0x20 +#define JSA1212_CONF_PXS_SLP_400MS 0x10 +#define JSA1212_CONF_PXS_SLP_800MS 0x00 + +/* JSA1212 INT REG bits */ +#define JSA1212_INT_CTRL_MASK 0x01 +#define JSA1212_INT_CTRL_EITHER 0x00 +#define JSA1212_INT_CTRL_BOTH 0x01 +#define JSA1212_INT_ALS_PRST_MASK 0x06 +#define JSA1212_INT_ALS_PRST_1CONV 0x00 +#define JSA1212_INT_ALS_PRST_4CONV 0x02 +#define JSA1212_INT_ALS_PRST_8CONV 0x04 +#define JSA1212_INT_ALS_PRST_16CONV 0x06 +#define JSA1212_INT_ALS_FLAG_MASK 0x08 +#define JSA1212_INT_ALS_FLAG_CLR 0x00 +#define JSA1212_INT_PXS_PRST_MASK 0x60 +#define JSA1212_INT_PXS_PRST_1CONV 0x00 +#define JSA1212_INT_PXS_PRST_4CONV 0x20 +#define JSA1212_INT_PXS_PRST_8CONV 0x40 +#define JSA1212_INT_PXS_PRST_16CONV 0x60 +#define JSA1212_INT_PXS_FLAG_MASK 0x80 +#define JSA1212_INT_PXS_FLAG_CLR 0x00 + +/* JSA1212 ALS RNG REG bits */ +#define JSA1212_ALS_RNG_0_2048 0x00 +#define JSA1212_ALS_RNG_0_1024 0x01 +#define JSA1212_ALS_RNG_0_512 0x02 +#define JSA1212_ALS_RNG_0_256 0x03 +#define JSA1212_ALS_RNG_0_128 0x04 + +/* JSA1212 INT threshold range */ +#define JSA1212_ALS_TH_MIN 0x0000 +#define JSA1212_ALS_TH_MAX 0x0FFF +#define JSA1212_PXS_TH_MIN 0x00 +#define JSA1212_PXS_TH_MAX 0xFF + +#define JSA1212_ALS_DELAY_MS 200 +#define JSA1212_PXS_DELAY_MS 100 + +#define JSA1212_DRIVER_NAME "jsa1212" +#define JSA1212_REGMAP_NAME "jsa1212_regmap" + +enum jsa1212_op_mode { + JSA1212_OPMODE_ALS_EN, + JSA1212_OPMODE_PXS_EN, +}; + +struct jsa1212_data { + struct i2c_client *client; + struct mutex lock; + u8 als_rng_idx; + bool als_en; /* ALS enable status */ + bool pxs_en; /* proximity enable status */ + struct regmap *regmap; +}; + +/* ALS range idx to val mapping */ +static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128, + 128, 128, 128}; + +/* Enables or disables ALS function based on status */ +static int jsa1212_als_enable(struct jsa1212_data *data, u8 status) +{ + int ret; + + ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, + JSA1212_CONF_ALS_MASK, + status); + if (ret < 0) + return ret; + + data->als_en = !!status; + + return 0; +} + +/* Enables or disables PXS function based on status */ +static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status) +{ + int ret; + + ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, + JSA1212_CONF_PXS_MASK, + status); + if (ret < 0) + return ret; + + data->pxs_en = !!status; + + return 0; +} + +static int jsa1212_read_als_data(struct jsa1212_data *data, + unsigned int *val) +{ + int ret; + __le16 als_data; + + ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE); + if (ret < 0) + return ret; + + /* Delay for data output */ + msleep(JSA1212_ALS_DELAY_MS); + + /* Read 12 bit data */ + ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2); + if (ret < 0) { + dev_err(&data->client->dev, "als data read err\n"); + goto als_data_read_err; + } + + *val = le16_to_cpu(als_data); + +als_data_read_err: + return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE); +} + +static int jsa1212_read_pxs_data(struct jsa1212_data *data, + unsigned int *val) +{ + int ret; + unsigned int pxs_data; + + ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE); + if (ret < 0) + return ret; + + /* Delay for data output */ + msleep(JSA1212_PXS_DELAY_MS); + + /* Read out all data */ + ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data); + if (ret < 0) { + dev_err(&data->client->dev, "pxs data read err\n"); + goto pxs_data_read_err; + } + + *val = pxs_data & JSA1212_PXS_DATA_MASK; + +pxs_data_read_err: + return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE); +} + +static int jsa1212_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + int ret; + struct jsa1212_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&data->lock); + switch (chan->type) { + case IIO_LIGHT: + ret = jsa1212_read_als_data(data, val); + break; + case IIO_PROXIMITY: + ret = jsa1212_read_pxs_data(data, val); + break; + default: + ret = -EINVAL; + break; + } + mutex_unlock(&data->lock); + return ret < 0 ? ret : IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_LIGHT: + *val = jsa1212_als_range_val[data->als_rng_idx]; + *val2 = BIT(12); /* Max 12 bit value */ + return IIO_VAL_FRACTIONAL; + default: + break; + } + break; + default: + break; + } + + return -EINVAL; +} + +static const struct iio_chan_spec jsa1212_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + }, + { + .type = IIO_PROXIMITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + } +}; + +static const struct iio_info jsa1212_info = { + .driver_module = THIS_MODULE, + .read_raw = &jsa1212_read_raw, +}; + +static int jsa1212_chip_init(struct jsa1212_data *data) +{ + int ret; + + ret = regmap_write(data->regmap, JSA1212_CONF_REG, + (JSA1212_CONF_PXS_SLP_50MS | + JSA1212_CONF_IRDR_200MA)); + if (ret < 0) + return ret; + + ret = regmap_write(data->regmap, JSA1212_INT_REG, + JSA1212_INT_ALS_PRST_4CONV); + if (ret < 0) + return ret; + + data->als_rng_idx = JSA1212_ALS_RNG_0_2048; + + return 0; +} + +static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case JSA1212_PXS_DATA_REG: + case JSA1212_ALS_DT1_REG: + case JSA1212_ALS_DT2_REG: + case JSA1212_INT_REG: + return true; + default: + return false; + } +} + +static struct regmap_config jsa1212_regmap_config = { + .name = JSA1212_REGMAP_NAME, + .reg_bits = 8, + .val_bits = 8, + .max_register = JSA1212_MAX_REG, + .cache_type = REGCACHE_RBTREE, + .volatile_reg = jsa1212_is_volatile_reg, +}; + +static int jsa1212_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct jsa1212_data *data; + struct iio_dev *indio_dev; + struct regmap *regmap; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&client->dev, "Regmap initialization failed.\n"); + return PTR_ERR(regmap); + } + + data = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + data->client = client; + data->regmap = regmap; + + mutex_init(&data->lock); + + ret = jsa1212_chip_init(data); + if (ret < 0) + return ret; + + indio_dev->dev.parent = &client->dev; + indio_dev->channels = jsa1212_channels; + indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels); + indio_dev->name = JSA1212_DRIVER_NAME; + indio_dev->modes = INDIO_DIRECT_MODE; + + indio_dev->info = &jsa1212_info; + + ret = iio_device_register(indio_dev); + if (ret < 0) + dev_err(&client->dev, "%s: register device failed\n", __func__); + + return ret; +} + + /* power off the device */ +static int jsa1212_power_off(struct jsa1212_data *data) +{ + int ret; + + mutex_lock(&data->lock); + + ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, + JSA1212_CONF_ALS_MASK | + JSA1212_CONF_PXS_MASK, + JSA1212_CONF_ALS_DISABLE | + JSA1212_CONF_PXS_DISABLE); + + if (ret < 0) + dev_err(&data->client->dev, "power off cmd failed\n"); + + mutex_unlock(&data->lock); + + return ret; +} + +static int jsa1212_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct jsa1212_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + return jsa1212_power_off(data); +} + +#ifdef CONFIG_PM_SLEEP +static int jsa1212_suspend(struct device *dev) +{ + struct jsa1212_data *data; + + data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); + + return jsa1212_power_off(data); +} + +static int jsa1212_resume(struct device *dev) +{ + int ret = 0; + struct jsa1212_data *data; + + data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); + + mutex_lock(&data->lock); + + if (data->als_en) { + ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE); + if (ret < 0) { + dev_err(dev, "als resume failed\n"); + goto unlock_and_ret; + } + } + + if (data->pxs_en) { + ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE); + if (ret < 0) + dev_err(dev, "pxs resume failed\n"); + } + +unlock_and_ret: + mutex_unlock(&data->lock); + return ret; +} + +static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume); + +#define JSA1212_PM_OPS (&jsa1212_pm_ops) +#else +#define JSA1212_PM_OPS NULL +#endif + +static const struct acpi_device_id jsa1212_acpi_match[] = { + {"JSA1212", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match); + +static const struct i2c_device_id jsa1212_id[] = { + { JSA1212_DRIVER_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, jsa1212_id); + +static struct i2c_driver jsa1212_driver = { + .driver = { + .name = JSA1212_DRIVER_NAME, + .pm = JSA1212_PM_OPS, + .owner = THIS_MODULE, + .acpi_match_table = ACPI_PTR(jsa1212_acpi_match), + }, + .probe = jsa1212_probe, + .remove = jsa1212_remove, + .id_table = jsa1212_id, +}; +module_i2c_driver(jsa1212_driver); + +MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>"); +MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c index ae3c71bdd6c6..076bc46fad03 100644 --- a/drivers/iio/light/lm3533-als.c +++ b/drivers/iio/light/lm3533-als.c @@ -657,7 +657,7 @@ static ALS_HYSTERESIS_ATTR_RO(3); #define ILLUMINANCE_ATTR_RO(_name) \ DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO, show_##_name, NULL) #define ILLUMINANCE_ATTR_RW(_name) \ - DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO | S_IWUSR , \ + DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO | S_IWUSR, \ show_##_name, store_##_name) /* * ALS Zone threshold-event enable diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c index a9e449b0be0c..71c2bde275aa 100644 --- a/drivers/iio/light/tcs3414.c +++ b/drivers/iio/light/tcs3414.c @@ -149,8 +149,8 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev, *val = ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - i = (data->gain & TCS3414_GAIN_MASK) >> TCS3414_GAIN_SHIFT; - *val = tcs3414_scales[i][0]; + i = (data->gain & TCS3414_GAIN_MASK) >> TCS3414_GAIN_SHIFT; + *val = tcs3414_scales[i][0]; *val2 = tcs3414_scales[i][1]; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_INT_TIME: diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig index b2dba9e506ab..4c7a4c52dd06 100644 --- a/drivers/iio/magnetometer/Kconfig +++ b/drivers/iio/magnetometer/Kconfig @@ -6,26 +6,21 @@ menu "Magnetometer sensors" config AK8975 - tristate "Asahi Kasei AK8975 3-Axis Magnetometer" + tristate "Asahi Kasei AK 3-Axis Magnetometer" depends on I2C depends on GPIOLIB help - Say yes here to build support for Asahi Kasei AK8975 3-Axis - Magnetometer. This driver can also support AK8963, if i2c - device name is identified as ak8963. + Say yes here to build support for Asahi Kasei AK8975, AK8963, + AK09911 or AK09912 3-Axis Magnetometer. To compile this driver as a module, choose M here: the module will be called ak8975. config AK09911 tristate "Asahi Kasei AK09911 3-axis Compass" - depends on I2C + select AK8975 help - Say yes here to build support for Asahi Kasei AK09911 3-Axis - Magnetometer. - - To compile this driver as a module, choose M here: the module - will be called ak09911. + Deprecated: AK09911 is now supported by AK8975 driver. config MAG3110 tristate "Freescale MAG3110 3-Axis Magnetometer" diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile index b91315e0b826..0f5d3c985799 100644 --- a/drivers/iio/magnetometer/Makefile +++ b/drivers/iio/magnetometer/Makefile @@ -3,7 +3,6 @@ # # When adding new entries keep the list in alphabetical order -obj-$(CONFIG_AK09911) += ak09911.o obj-$(CONFIG_AK8975) += ak8975.o obj-$(CONFIG_MAG3110) += mag3110.o obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o diff --git a/drivers/iio/magnetometer/ak09911.c b/drivers/iio/magnetometer/ak09911.c deleted file mode 100644 index b2bc942ff6b8..000000000000 --- a/drivers/iio/magnetometer/ak09911.c +++ /dev/null @@ -1,326 +0,0 @@ -/* - * AK09911 3-axis compass driver - * Copyright (c) 2014, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/i2c.h> -#include <linux/acpi.h> -#include <linux/iio/iio.h> - -#define AK09911_REG_WIA1 0x00 -#define AK09911_REG_WIA2 0x01 -#define AK09911_WIA1_VALUE 0x48 -#define AK09911_WIA2_VALUE 0x05 - -#define AK09911_REG_ST1 0x10 -#define AK09911_REG_HXL 0x11 -#define AK09911_REG_HXH 0x12 -#define AK09911_REG_HYL 0x13 -#define AK09911_REG_HYH 0x14 -#define AK09911_REG_HZL 0x15 -#define AK09911_REG_HZH 0x16 - -#define AK09911_REG_ASAX 0x60 -#define AK09911_REG_ASAY 0x61 -#define AK09911_REG_ASAZ 0x62 - -#define AK09911_REG_CNTL1 0x30 -#define AK09911_REG_CNTL2 0x31 -#define AK09911_REG_CNTL3 0x32 - -#define AK09911_MODE_SNG_MEASURE 0x01 -#define AK09911_MODE_SELF_TEST 0x10 -#define AK09911_MODE_FUSE_ACCESS 0x1F -#define AK09911_MODE_POWERDOWN 0x00 -#define AK09911_RESET_DATA 0x01 - -#define AK09911_REG_CNTL1 0x30 -#define AK09911_REG_CNTL2 0x31 -#define AK09911_REG_CNTL3 0x32 - -#define AK09911_RAW_TO_GAUSS(asa) ((((asa) + 128) * 6000) / 256) - -#define AK09911_MAX_CONVERSION_TIMEOUT_MS 500 -#define AK09911_CONVERSION_DONE_POLL_TIME_MS 10 - -struct ak09911_data { - struct i2c_client *client; - struct mutex lock; - u8 asa[3]; - long raw_to_gauss[3]; -}; - -static const int ak09911_index_to_reg[] = { - AK09911_REG_HXL, AK09911_REG_HYL, AK09911_REG_HZL, -}; - -static int ak09911_set_mode(struct i2c_client *client, u8 mode) -{ - int ret; - - switch (mode) { - case AK09911_MODE_SNG_MEASURE: - case AK09911_MODE_SELF_TEST: - case AK09911_MODE_FUSE_ACCESS: - case AK09911_MODE_POWERDOWN: - ret = i2c_smbus_write_byte_data(client, - AK09911_REG_CNTL2, mode); - if (ret < 0) { - dev_err(&client->dev, "set_mode error\n"); - return ret; - } - /* After mode change wait atleast 100us */ - usleep_range(100, 500); - break; - default: - dev_err(&client->dev, - "%s: Unknown mode(%d).", __func__, mode); - return -EINVAL; - } - - return ret; -} - -/* Get Sensitivity Adjustment value */ -static int ak09911_get_asa(struct i2c_client *client) -{ - struct iio_dev *indio_dev = i2c_get_clientdata(client); - struct ak09911_data *data = iio_priv(indio_dev); - int ret; - - ret = ak09911_set_mode(client, AK09911_MODE_FUSE_ACCESS); - if (ret < 0) - return ret; - - /* Get asa data and store in the device data. */ - ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_ASAX, - 3, data->asa); - if (ret < 0) { - dev_err(&client->dev, "Not able to read asa data\n"); - return ret; - } - - ret = ak09911_set_mode(client, AK09911_MODE_POWERDOWN); - if (ret < 0) - return ret; - - data->raw_to_gauss[0] = AK09911_RAW_TO_GAUSS(data->asa[0]); - data->raw_to_gauss[1] = AK09911_RAW_TO_GAUSS(data->asa[1]); - data->raw_to_gauss[2] = AK09911_RAW_TO_GAUSS(data->asa[2]); - - return 0; -} - -static int ak09911_verify_chip_id(struct i2c_client *client) -{ - u8 wia_val[2]; - int ret; - - ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_WIA1, - 2, wia_val); - if (ret < 0) { - dev_err(&client->dev, "Error reading WIA\n"); - return ret; - } - - dev_dbg(&client->dev, "WIA %02x %02x\n", wia_val[0], wia_val[1]); - - if (wia_val[0] != AK09911_WIA1_VALUE || - wia_val[1] != AK09911_WIA2_VALUE) { - dev_err(&client->dev, "Device ak09911 not found\n"); - return -ENODEV; - } - - return 0; -} - -static int wait_conversion_complete_polled(struct ak09911_data *data) -{ - struct i2c_client *client = data->client; - u8 read_status; - u32 timeout_ms = AK09911_MAX_CONVERSION_TIMEOUT_MS; - int ret; - - /* Wait for the conversion to complete. */ - while (timeout_ms) { - msleep_interruptible(AK09911_CONVERSION_DONE_POLL_TIME_MS); - ret = i2c_smbus_read_byte_data(client, AK09911_REG_ST1); - if (ret < 0) { - dev_err(&client->dev, "Error in reading ST1\n"); - return ret; - } - read_status = ret & 0x01; - if (read_status) - break; - timeout_ms -= AK09911_CONVERSION_DONE_POLL_TIME_MS; - } - if (!timeout_ms) { - dev_err(&client->dev, "Conversion timeout happened\n"); - return -EIO; - } - - return read_status; -} - -static int ak09911_read_axis(struct iio_dev *indio_dev, int index, int *val) -{ - struct ak09911_data *data = iio_priv(indio_dev); - struct i2c_client *client = data->client; - int ret; - - mutex_lock(&data->lock); - - ret = ak09911_set_mode(client, AK09911_MODE_SNG_MEASURE); - if (ret < 0) - goto fn_exit; - - ret = wait_conversion_complete_polled(data); - if (ret < 0) - goto fn_exit; - - /* Read data */ - ret = i2c_smbus_read_word_data(client, ak09911_index_to_reg[index]); - if (ret < 0) { - dev_err(&client->dev, "Read axis data fails\n"); - goto fn_exit; - } - - mutex_unlock(&data->lock); - - /* Clamp to valid range. */ - *val = sign_extend32(clamp_t(s16, ret, -8192, 8191), 13); - - return IIO_VAL_INT; - -fn_exit: - mutex_unlock(&data->lock); - - return ret; -} - -static int ak09911_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, - long mask) -{ - struct ak09911_data *data = iio_priv(indio_dev); - - switch (mask) { - case IIO_CHAN_INFO_RAW: - return ak09911_read_axis(indio_dev, chan->address, val); - case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = data->raw_to_gauss[chan->address]; - return IIO_VAL_INT_PLUS_MICRO; - } - - return -EINVAL; -} - -#define AK09911_CHANNEL(axis, index) \ - { \ - .type = IIO_MAGN, \ - .modified = 1, \ - .channel2 = IIO_MOD_##axis, \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ - BIT(IIO_CHAN_INFO_SCALE), \ - .address = index, \ - } - -static const struct iio_chan_spec ak09911_channels[] = { - AK09911_CHANNEL(X, 0), AK09911_CHANNEL(Y, 1), AK09911_CHANNEL(Z, 2), -}; - -static const struct iio_info ak09911_info = { - .read_raw = &ak09911_read_raw, - .driver_module = THIS_MODULE, -}; - -static const struct acpi_device_id ak_acpi_match[] = { - {"AK009911", 0}, - { }, -}; -MODULE_DEVICE_TABLE(acpi, ak_acpi_match); - -static int ak09911_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct iio_dev *indio_dev; - struct ak09911_data *data; - const char *name; - int ret; - - ret = ak09911_verify_chip_id(client); - if (ret) { - dev_err(&client->dev, "AK00911 not detected\n"); - return -ENODEV; - } - - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); - if (indio_dev == NULL) - return -ENOMEM; - - data = iio_priv(indio_dev); - i2c_set_clientdata(client, indio_dev); - - data->client = client; - mutex_init(&data->lock); - - ret = ak09911_get_asa(client); - if (ret) - return ret; - - if (id) - name = id->name; - else if (ACPI_HANDLE(&client->dev)) - name = dev_name(&client->dev); - else - return -ENODEV; - - dev_dbg(&client->dev, "Asahi compass chip %s\n", name); - - indio_dev->dev.parent = &client->dev; - indio_dev->channels = ak09911_channels; - indio_dev->num_channels = ARRAY_SIZE(ak09911_channels); - indio_dev->info = &ak09911_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->name = name; - - return devm_iio_device_register(&client->dev, indio_dev); -} - -static const struct i2c_device_id ak09911_id[] = { - {"ak09911", 0}, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ak09911_id); - -static struct i2c_driver ak09911_driver = { - .driver = { - .name = "ak09911", - .acpi_match_table = ACPI_PTR(ak_acpi_match), - }, - .probe = ak09911_probe, - .id_table = ak09911_id, -}; -module_i2c_driver(ak09911_driver); - -MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("AK09911 Compass driver"); diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c index bf5ef077e791..b13936dacc78 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -64,10 +64,10 @@ #define AK8975_REG_CNTL 0x0A #define AK8975_REG_CNTL_MODE_SHIFT 0 #define AK8975_REG_CNTL_MODE_MASK (0xF << AK8975_REG_CNTL_MODE_SHIFT) -#define AK8975_REG_CNTL_MODE_POWER_DOWN 0 -#define AK8975_REG_CNTL_MODE_ONCE 1 -#define AK8975_REG_CNTL_MODE_SELF_TEST 8 -#define AK8975_REG_CNTL_MODE_FUSE_ROM 0xF +#define AK8975_REG_CNTL_MODE_POWER_DOWN 0x00 +#define AK8975_REG_CNTL_MODE_ONCE 0x01 +#define AK8975_REG_CNTL_MODE_SELF_TEST 0x08 +#define AK8975_REG_CNTL_MODE_FUSE_ROM 0x0F #define AK8975_REG_RSVC 0x0B #define AK8975_REG_ASTC 0x0C @@ -81,18 +81,278 @@ #define AK8975_MAX_REGS AK8975_REG_ASAZ /* + * AK09912 Register definitions + */ +#define AK09912_REG_WIA1 0x00 +#define AK09912_REG_WIA2 0x01 +#define AK09912_DEVICE_ID 0x04 +#define AK09911_DEVICE_ID 0x05 + +#define AK09911_REG_INFO1 0x02 +#define AK09911_REG_INFO2 0x03 + +#define AK09912_REG_ST1 0x10 + +#define AK09912_REG_ST1_DRDY_SHIFT 0 +#define AK09912_REG_ST1_DRDY_MASK (1 << AK09912_REG_ST1_DRDY_SHIFT) + +#define AK09912_REG_HXL 0x11 +#define AK09912_REG_HXH 0x12 +#define AK09912_REG_HYL 0x13 +#define AK09912_REG_HYH 0x14 +#define AK09912_REG_HZL 0x15 +#define AK09912_REG_HZH 0x16 +#define AK09912_REG_TMPS 0x17 + +#define AK09912_REG_ST2 0x18 +#define AK09912_REG_ST2_HOFL_SHIFT 3 +#define AK09912_REG_ST2_HOFL_MASK (1 << AK09912_REG_ST2_HOFL_SHIFT) + +#define AK09912_REG_CNTL1 0x30 + +#define AK09912_REG_CNTL2 0x31 +#define AK09912_REG_CNTL_MODE_POWER_DOWN 0x00 +#define AK09912_REG_CNTL_MODE_ONCE 0x01 +#define AK09912_REG_CNTL_MODE_SELF_TEST 0x10 +#define AK09912_REG_CNTL_MODE_FUSE_ROM 0x1F +#define AK09912_REG_CNTL2_MODE_SHIFT 0 +#define AK09912_REG_CNTL2_MODE_MASK (0x1F << AK09912_REG_CNTL2_MODE_SHIFT) + +#define AK09912_REG_CNTL3 0x32 + +#define AK09912_REG_TS1 0x33 +#define AK09912_REG_TS2 0x34 +#define AK09912_REG_TS3 0x35 +#define AK09912_REG_I2CDIS 0x36 +#define AK09912_REG_TS4 0x37 + +#define AK09912_REG_ASAX 0x60 +#define AK09912_REG_ASAY 0x61 +#define AK09912_REG_ASAZ 0x62 + +#define AK09912_MAX_REGS AK09912_REG_ASAZ + +/* * Miscellaneous values. */ #define AK8975_MAX_CONVERSION_TIMEOUT 500 #define AK8975_CONVERSION_DONE_POLL_TIME 10 #define AK8975_DATA_READY_TIMEOUT ((100*HZ)/1000) -#define RAW_TO_GAUSS_8975(asa) ((((asa) + 128) * 3000) / 256) -#define RAW_TO_GAUSS_8963(asa) ((((asa) + 128) * 6000) / 256) + +/* + * Precalculate scale factor (in Gauss units) for each axis and + * store in the device data. + * + * This scale factor is axis-dependent, and is derived from 3 calibration + * factors ASA(x), ASA(y), and ASA(z). + * + * These ASA values are read from the sensor device at start of day, and + * cached in the device context struct. + * + * Adjusting the flux value with the sensitivity adjustment value should be + * done via the following formula: + * + * Hadj = H * ( ( ( (ASA-128)*0.5 ) / 128 ) + 1 ) + * where H is the raw value, ASA is the sensitivity adjustment, and Hadj + * is the resultant adjusted value. + * + * We reduce the formula to: + * + * Hadj = H * (ASA + 128) / 256 + * + * H is in the range of -4096 to 4095. The magnetometer has a range of + * +-1229uT. To go from the raw value to uT is: + * + * HuT = H * 1229/4096, or roughly, 3/10. + * + * Since 1uT = 0.01 gauss, our final scale factor becomes: + * + * Hadj = H * ((ASA + 128) / 256) * 3/10 * 1/100 + * Hadj = H * ((ASA + 128) * 0.003) / 256 + * + * Since ASA doesn't change, we cache the resultant scale factor into the + * device context in ak8975_setup(). + * + * Given we use IIO_VAL_INT_PLUS_MICRO bit when displaying the scale, we + * multiply the stored scale value by 1e6. + */ +static long ak8975_raw_to_gauss(u16 data) +{ + return (((long)data + 128) * 3000) / 256; +} + +/* + * For AK8963 and AK09911, same calculation, but the device is less sensitive: + * + * H is in the range of +-8190. The magnetometer has a range of + * +-4912uT. To go from the raw value to uT is: + * + * HuT = H * 4912/8190, or roughly, 6/10, instead of 3/10. + */ + +static long ak8963_09911_raw_to_gauss(u16 data) +{ + return (((long)data + 128) * 6000) / 256; +} + +/* + * For AK09912, same calculation, except the device is more sensitive: + * + * H is in the range of -32752 to 32752. The magnetometer has a range of + * +-4912uT. To go from the raw value to uT is: + * + * HuT = H * 4912/32752, or roughly, 3/20, instead of 3/10. + */ +static long ak09912_raw_to_gauss(u16 data) +{ + return (((long)data + 128) * 1500) / 256; +} /* Compatible Asahi Kasei Compass parts */ enum asahi_compass_chipset { AK8975, AK8963, + AK09911, + AK09912, + AK_MAX_TYPE +}; + +enum ak_ctrl_reg_addr { + ST1, + ST2, + CNTL, + ASA_BASE, + MAX_REGS, + REGS_END, +}; + +enum ak_ctrl_reg_mask { + ST1_DRDY, + ST2_HOFL, + ST2_DERR, + CNTL_MODE, + MASK_END, +}; + +enum ak_ctrl_mode { + POWER_DOWN, + MODE_ONCE, + SELF_TEST, + FUSE_ROM, + MODE_END, +}; + +struct ak_def { + enum asahi_compass_chipset type; + long (*raw_to_gauss)(u16 data); + u16 range; + u8 ctrl_regs[REGS_END]; + u8 ctrl_masks[MASK_END]; + u8 ctrl_modes[MODE_END]; + u8 data_regs[3]; +}; + +static struct ak_def ak_def_array[AK_MAX_TYPE] = { + { + .type = AK8975, + .raw_to_gauss = ak8975_raw_to_gauss, + .range = 4096, + .ctrl_regs = { + AK8975_REG_ST1, + AK8975_REG_ST2, + AK8975_REG_CNTL, + AK8975_REG_ASAX, + AK8975_MAX_REGS}, + .ctrl_masks = { + AK8975_REG_ST1_DRDY_MASK, + AK8975_REG_ST2_HOFL_MASK, + AK8975_REG_ST2_DERR_MASK, + AK8975_REG_CNTL_MODE_MASK}, + .ctrl_modes = { + AK8975_REG_CNTL_MODE_POWER_DOWN, + AK8975_REG_CNTL_MODE_ONCE, + AK8975_REG_CNTL_MODE_SELF_TEST, + AK8975_REG_CNTL_MODE_FUSE_ROM}, + .data_regs = { + AK8975_REG_HXL, + AK8975_REG_HYL, + AK8975_REG_HZL}, + }, + { + .type = AK8963, + .raw_to_gauss = ak8963_09911_raw_to_gauss, + .range = 8190, + .ctrl_regs = { + AK8975_REG_ST1, + AK8975_REG_ST2, + AK8975_REG_CNTL, + AK8975_REG_ASAX, + AK8975_MAX_REGS}, + .ctrl_masks = { + AK8975_REG_ST1_DRDY_MASK, + AK8975_REG_ST2_HOFL_MASK, + 0, + AK8975_REG_CNTL_MODE_MASK}, + .ctrl_modes = { + AK8975_REG_CNTL_MODE_POWER_DOWN, + AK8975_REG_CNTL_MODE_ONCE, + AK8975_REG_CNTL_MODE_SELF_TEST, + AK8975_REG_CNTL_MODE_FUSE_ROM}, + .data_regs = { + AK8975_REG_HXL, + AK8975_REG_HYL, + AK8975_REG_HZL}, + }, + { + .type = AK09911, + .raw_to_gauss = ak8963_09911_raw_to_gauss, + .range = 8192, + .ctrl_regs = { + AK09912_REG_ST1, + AK09912_REG_ST2, + AK09912_REG_CNTL2, + AK09912_REG_ASAX, + AK09912_MAX_REGS}, + .ctrl_masks = { + AK09912_REG_ST1_DRDY_MASK, + AK09912_REG_ST2_HOFL_MASK, + 0, + AK09912_REG_CNTL2_MODE_MASK}, + .ctrl_modes = { + AK09912_REG_CNTL_MODE_POWER_DOWN, + AK09912_REG_CNTL_MODE_ONCE, + AK09912_REG_CNTL_MODE_SELF_TEST, + AK09912_REG_CNTL_MODE_FUSE_ROM}, + .data_regs = { + AK09912_REG_HXL, + AK09912_REG_HYL, + AK09912_REG_HZL}, + }, + { + .type = AK09912, + .raw_to_gauss = ak09912_raw_to_gauss, + .range = 32752, + .ctrl_regs = { + AK09912_REG_ST1, + AK09912_REG_ST2, + AK09912_REG_CNTL2, + AK09912_REG_ASAX, + AK09912_MAX_REGS}, + .ctrl_masks = { + AK09912_REG_ST1_DRDY_MASK, + AK09912_REG_ST2_HOFL_MASK, + 0, + AK09912_REG_CNTL2_MODE_MASK}, + .ctrl_modes = { + AK09912_REG_CNTL_MODE_POWER_DOWN, + AK09912_REG_CNTL_MODE_ONCE, + AK09912_REG_CNTL_MODE_SELF_TEST, + AK09912_REG_CNTL_MODE_FUSE_ROM}, + .data_regs = { + AK09912_REG_HXL, + AK09912_REG_HYL, + AK09912_REG_HZL}, + } }; /* @@ -100,40 +360,82 @@ enum asahi_compass_chipset { */ struct ak8975_data { struct i2c_client *client; + struct ak_def *def; struct attribute_group attrs; struct mutex lock; u8 asa[3]; long raw_to_gauss[3]; - u8 reg_cache[AK8975_MAX_REGS]; int eoc_gpio; int eoc_irq; wait_queue_head_t data_ready_queue; unsigned long flags; - enum asahi_compass_chipset chipset; + u8 cntl_cache; }; -static const int ak8975_index_to_reg[] = { - AK8975_REG_HXL, AK8975_REG_HYL, AK8975_REG_HZL, -}; +/* + * Return 0 if the i2c device is the one we expect. + * return a negative error number otherwise + */ +static int ak8975_who_i_am(struct i2c_client *client, + enum asahi_compass_chipset type) +{ + u8 wia_val[2]; + int ret; + + /* + * Signature for each device: + * Device | WIA1 | WIA2 + * AK09912 | DEVICE_ID | AK09912_DEVICE_ID + * AK09911 | DEVICE_ID | AK09911_DEVICE_ID + * AK8975 | DEVICE_ID | NA + * AK8963 | DEVICE_ID | NA + */ + ret = i2c_smbus_read_i2c_block_data(client, AK09912_REG_WIA1, + 2, wia_val); + if (ret < 0) { + dev_err(&client->dev, "Error reading WIA\n"); + return ret; + } + + if (wia_val[0] != AK8975_DEVICE_ID) + return -ENODEV; + + switch (type) { + case AK8975: + case AK8963: + return 0; + case AK09911: + if (wia_val[1] == AK09911_DEVICE_ID) + return 0; + break; + case AK09912: + if (wia_val[1] == AK09912_DEVICE_ID) + return 0; + break; + default: + dev_err(&client->dev, "Type %d unknown\n", type); + } + return -ENODEV; +} /* - * Helper function to write to the I2C device's registers. + * Helper function to write to CNTL register. */ -static int ak8975_write_data(struct i2c_client *client, - u8 reg, u8 val, u8 mask, u8 shift) +static int ak8975_set_mode(struct ak8975_data *data, enum ak_ctrl_mode mode) { - struct iio_dev *indio_dev = i2c_get_clientdata(client); - struct ak8975_data *data = iio_priv(indio_dev); u8 regval; int ret; - regval = (data->reg_cache[reg] & ~mask) | (val << shift); - ret = i2c_smbus_write_byte_data(client, reg, regval); + regval = (data->cntl_cache & ~data->def->ctrl_masks[CNTL_MODE]) | + data->def->ctrl_modes[mode]; + ret = i2c_smbus_write_byte_data(data->client, + data->def->ctrl_regs[CNTL], regval); if (ret < 0) { - dev_err(&client->dev, "Write to device fails status %x\n", ret); return ret; } - data->reg_cache[reg] = regval; + data->cntl_cache = regval; + /* After mode change wait atleast 100us */ + usleep_range(100, 500); return 0; } @@ -166,8 +468,8 @@ static int ak8975_setup_irq(struct ak8975_data *data) irq = gpio_to_irq(data->eoc_gpio); rc = devm_request_irq(&client->dev, irq, ak8975_irq_handler, - IRQF_TRIGGER_RISING | IRQF_ONESHOT, - dev_name(&client->dev), data); + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(&client->dev), data); if (rc < 0) { dev_err(&client->dev, "irq %d request failed, (gpio %d): %d\n", @@ -191,34 +493,18 @@ static int ak8975_setup(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); struct ak8975_data *data = iio_priv(indio_dev); - u8 device_id; int ret; - /* Confirm that the device we're talking to is really an AK8975. */ - ret = i2c_smbus_read_byte_data(client, AK8975_REG_WIA); - if (ret < 0) { - dev_err(&client->dev, "Error reading WIA\n"); - return ret; - } - device_id = ret; - if (device_id != AK8975_DEVICE_ID) { - dev_err(&client->dev, "Device ak8975 not found\n"); - return -ENODEV; - } - /* Write the fused rom access mode. */ - ret = ak8975_write_data(client, - AK8975_REG_CNTL, - AK8975_REG_CNTL_MODE_FUSE_ROM, - AK8975_REG_CNTL_MODE_MASK, - AK8975_REG_CNTL_MODE_SHIFT); + ret = ak8975_set_mode(data, FUSE_ROM); if (ret < 0) { dev_err(&client->dev, "Error in setting fuse access mode\n"); return ret; } /* Get asa data and store in the device data. */ - ret = i2c_smbus_read_i2c_block_data(client, AK8975_REG_ASAX, + ret = i2c_smbus_read_i2c_block_data(client, + data->def->ctrl_regs[ASA_BASE], 3, data->asa); if (ret < 0) { dev_err(&client->dev, "Not able to read asa data\n"); @@ -226,13 +512,13 @@ static int ak8975_setup(struct i2c_client *client) } /* After reading fuse ROM data set power-down mode */ - ret = ak8975_write_data(client, - AK8975_REG_CNTL, - AK8975_REG_CNTL_MODE_POWER_DOWN, - AK8975_REG_CNTL_MODE_MASK, - AK8975_REG_CNTL_MODE_SHIFT); + ret = ak8975_set_mode(data, POWER_DOWN); + if (ret < 0) { + dev_err(&client->dev, "Error in setting power-down mode\n"); + return ret; + } - if (data->eoc_gpio > 0 || client->irq) { + if (data->eoc_gpio > 0 || client->irq > 0) { ret = ak8975_setup_irq(data); if (ret < 0) { dev_err(&client->dev, @@ -241,61 +527,9 @@ static int ak8975_setup(struct i2c_client *client) } } - if (ret < 0) { - dev_err(&client->dev, "Error in setting power-down mode\n"); - return ret; - } - -/* - * Precalculate scale factor (in Gauss units) for each axis and - * store in the device data. - * - * This scale factor is axis-dependent, and is derived from 3 calibration - * factors ASA(x), ASA(y), and ASA(z). - * - * These ASA values are read from the sensor device at start of day, and - * cached in the device context struct. - * - * Adjusting the flux value with the sensitivity adjustment value should be - * done via the following formula: - * - * Hadj = H * ( ( ( (ASA-128)*0.5 ) / 128 ) + 1 ) - * - * where H is the raw value, ASA is the sensitivity adjustment, and Hadj - * is the resultant adjusted value. - * - * We reduce the formula to: - * - * Hadj = H * (ASA + 128) / 256 - * - * H is in the range of -4096 to 4095. The magnetometer has a range of - * +-1229uT. To go from the raw value to uT is: - * - * HuT = H * 1229/4096, or roughly, 3/10. - * - * Since 1uT = 0.01 gauss, our final scale factor becomes: - * - * Hadj = H * ((ASA + 128) / 256) * 3/10 * 1/100 - * Hadj = H * ((ASA + 128) * 0.003) / 256 - * - * Since ASA doesn't change, we cache the resultant scale factor into the - * device context in ak8975_setup(). - */ - if (data->chipset == AK8963) { - /* - * H range is +-8190 and magnetometer range is +-4912. - * So HuT using the above explanation for 8975, - * 4912/8190 = ~ 6/10. - * So the Hadj should use 6/10 instead of 3/10. - */ - data->raw_to_gauss[0] = RAW_TO_GAUSS_8963(data->asa[0]); - data->raw_to_gauss[1] = RAW_TO_GAUSS_8963(data->asa[1]); - data->raw_to_gauss[2] = RAW_TO_GAUSS_8963(data->asa[2]); - } else { - data->raw_to_gauss[0] = RAW_TO_GAUSS_8975(data->asa[0]); - data->raw_to_gauss[1] = RAW_TO_GAUSS_8975(data->asa[1]); - data->raw_to_gauss[2] = RAW_TO_GAUSS_8975(data->asa[2]); - } + data->raw_to_gauss[0] = data->def->raw_to_gauss(data->asa[0]); + data->raw_to_gauss[1] = data->def->raw_to_gauss(data->asa[1]); + data->raw_to_gauss[2] = data->def->raw_to_gauss(data->asa[2]); return 0; } @@ -318,7 +552,7 @@ static int wait_conversion_complete_gpio(struct ak8975_data *data) return -EINVAL; } - ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST1); + ret = i2c_smbus_read_byte_data(client, data->def->ctrl_regs[ST1]); if (ret < 0) dev_err(&client->dev, "Error in reading ST1\n"); @@ -335,7 +569,8 @@ static int wait_conversion_complete_polled(struct ak8975_data *data) /* Wait for the conversion to complete. */ while (timeout_ms) { msleep(AK8975_CONVERSION_DONE_POLL_TIME); - ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST1); + ret = i2c_smbus_read_byte_data(client, + data->def->ctrl_regs[ST1]); if (ret < 0) { dev_err(&client->dev, "Error in reading ST1\n"); return ret; @@ -378,11 +613,7 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val) mutex_lock(&data->lock); /* Set up the device for taking a sample. */ - ret = ak8975_write_data(client, - AK8975_REG_CNTL, - AK8975_REG_CNTL_MODE_ONCE, - AK8975_REG_CNTL_MODE_MASK, - AK8975_REG_CNTL_MODE_SHIFT); + ret = ak8975_set_mode(data, MODE_ONCE); if (ret < 0) { dev_err(&client->dev, "Error in setting operating mode\n"); goto exit; @@ -399,14 +630,15 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val) goto exit; /* This will be executed only for non-interrupt based waiting case */ - if (ret & AK8975_REG_ST1_DRDY_MASK) { - ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST2); + if (ret & data->def->ctrl_masks[ST1_DRDY]) { + ret = i2c_smbus_read_byte_data(client, + data->def->ctrl_regs[ST2]); if (ret < 0) { dev_err(&client->dev, "Error in reading ST2\n"); goto exit; } - if (ret & (AK8975_REG_ST2_DERR_MASK | - AK8975_REG_ST2_HOFL_MASK)) { + if (ret & (data->def->ctrl_masks[ST2_DERR] | + data->def->ctrl_masks[ST2_HOFL])) { dev_err(&client->dev, "ST2 status error 0x%x\n", ret); ret = -EINVAL; goto exit; @@ -415,7 +647,7 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val) /* Read the flux value from the appropriate register (the register is specified in the iio device attributes). */ - ret = i2c_smbus_read_word_data(client, ak8975_index_to_reg[index]); + ret = i2c_smbus_read_word_data(client, data->def->data_regs[index]); if (ret < 0) { dev_err(&client->dev, "Read axis data fails\n"); goto exit; @@ -424,7 +656,7 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val) mutex_unlock(&data->lock); /* Clamp to valid range. */ - *val = clamp_t(s16, ret, -4096, 4095); + *val = clamp_t(s16, ret, -data->def->range, data->def->range); return IIO_VAL_INT; exit: @@ -473,6 +705,8 @@ static const struct acpi_device_id ak_acpi_match[] = { {"AK8975", AK8975}, {"AK8963", AK8963}, {"INVN6500", AK8963}, + {"AK09911", AK09911}, + {"AK09912", AK09912}, { }, }; MODULE_DEVICE_TABLE(acpi, ak_acpi_match); @@ -498,6 +732,7 @@ static int ak8975_probe(struct i2c_client *client, int eoc_gpio; int err; const char *name = NULL; + enum asahi_compass_chipset chipset; /* Grab and set up the supplied GPIO. */ if (client->dev.platform_data) @@ -537,42 +772,50 @@ static int ak8975_probe(struct i2c_client *client, /* id will be NULL when enumerated via ACPI */ if (id) { - data->chipset = - (enum asahi_compass_chipset)(id->driver_data); + chipset = (enum asahi_compass_chipset)(id->driver_data); name = id->name; } else if (ACPI_HANDLE(&client->dev)) - name = ak8975_match_acpi_device(&client->dev, &data->chipset); + name = ak8975_match_acpi_device(&client->dev, &chipset); else return -ENOSYS; + if (chipset >= AK_MAX_TYPE) { + dev_err(&client->dev, "AKM device type unsupported: %d\n", + chipset); + return -ENODEV; + } + + data->def = &ak_def_array[chipset]; + err = ak8975_who_i_am(client, data->def->type); + if (err < 0) { + dev_err(&client->dev, "Unexpected device\n"); + return err; + } dev_dbg(&client->dev, "Asahi compass chip %s\n", name); /* Perform some basic start-of-day setup of the device. */ err = ak8975_setup(client); if (err < 0) { - dev_err(&client->dev, "AK8975 initialization fails\n"); + dev_err(&client->dev, "%s initialization fails\n", name); return err; } - data->client = client; mutex_init(&data->lock); - data->eoc_gpio = eoc_gpio; indio_dev->dev.parent = &client->dev; indio_dev->channels = ak8975_channels; indio_dev->num_channels = ARRAY_SIZE(ak8975_channels); indio_dev->info = &ak8975_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->name = name; - err = devm_iio_device_register(&client->dev, indio_dev); - if (err < 0) - return err; - - return 0; + return devm_iio_device_register(&client->dev, indio_dev); } static const struct i2c_device_id ak8975_id[] = { {"ak8975", AK8975}, {"ak8963", AK8963}, + {"AK8963", AK8963}, + {"ak09911", AK09911}, + {"ak09912", AK09912}, {} }; @@ -581,14 +824,20 @@ MODULE_DEVICE_TABLE(i2c, ak8975_id); static const struct of_device_id ak8975_of_match[] = { { .compatible = "asahi-kasei,ak8975", }, { .compatible = "ak8975", }, - { } + { .compatible = "asahi-kasei,ak8963", }, + { .compatible = "ak8963", }, + { .compatible = "asahi-kasei,ak09911", }, + { .compatible = "ak09911", }, + { .compatible = "asahi-kasei,ak09912", }, + { .compatible = "ak09912", }, + {} }; MODULE_DEVICE_TABLE(of, ak8975_of_match); static struct i2c_driver ak8975_driver = { .driver = { .name = "ak8975", - .of_match_table = ak8975_of_match, + .of_match_table = of_match_ptr(ak8975_of_match), .acpi_match_table = ACPI_PTR(ak_acpi_match), }, .probe = ak8975_probe, diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c index 4d299f39ffd1..4f9c0be24451 100644 --- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c +++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c @@ -157,20 +157,12 @@ static int magn_3d_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; switch (mask) { case 0: - poll_value = hid_sensor_read_poll_value( - &magn_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&magn_state->common_attributes, true); - msleep_interruptible(poll_value * 2); - report_id = magn_state->magn[chan->address].report_id; address = magn_3d_addresses[chan->address]; @@ -531,6 +523,7 @@ static struct platform_driver hid_magn_3d_platform_driver = { .id_table = hid_magn_3d_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_magn_3d_probe, .remove = hid_magn_3d_remove, diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c index 45bed080b4a6..5930fa32a2ab 100644 --- a/drivers/iio/orientation/hid-sensor-incl-3d.c +++ b/drivers/iio/orientation/hid-sensor-incl-3d.c @@ -111,20 +111,12 @@ static int incl_3d_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; switch (mask) { case IIO_CHAN_INFO_RAW: - poll_value = hid_sensor_read_poll_value( - &incl_state->common_attributes); - if (poll_value < 0) - return -EINVAL; - hid_sensor_power_state(&incl_state->common_attributes, true); - msleep_interruptible(poll_value * 2); - report_id = incl_state->incl[chan->scan_index].report_id; address = incl_3d_addresses[chan->scan_index]; @@ -438,6 +430,7 @@ static struct platform_driver hid_incl_3d_platform_driver = { .id_table = hid_incl_3d_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_incl_3d_probe, .remove = hid_incl_3d_remove, diff --git a/drivers/iio/pressure/bmp280.c b/drivers/iio/pressure/bmp280.c index 75038dacfff1..7c623e2bd633 100644 --- a/drivers/iio/pressure/bmp280.c +++ b/drivers/iio/pressure/bmp280.c @@ -80,16 +80,12 @@ struct bmp280_data { s32 t_fine; }; -/* Compensation parameters. */ -struct bmp280_comp_temp { - u16 dig_t1; - s16 dig_t2, dig_t3; -}; - -struct bmp280_comp_press { - u16 dig_p1; - s16 dig_p2, dig_p3, dig_p4, dig_p5, dig_p6, dig_p7, dig_p8, dig_p9; -}; +/* + * These enums are used for indexing into the array of compensation + * parameters. + */ +enum { T1, T2, T3 }; +enum { P1, P2, P3, P4, P5, P6, P7, P8, P9 }; static const struct iio_chan_spec bmp280_channels[] = { { @@ -141,54 +137,6 @@ static const struct regmap_config bmp280_regmap_config = { .volatile_reg = bmp280_is_volatile_reg, }; -static int bmp280_read_compensation_temp(struct bmp280_data *data, - struct bmp280_comp_temp *comp) -{ - int ret; - __le16 buf[BMP280_COMP_TEMP_REG_COUNT / 2]; - - ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_TEMP_START, - buf, BMP280_COMP_TEMP_REG_COUNT); - if (ret < 0) { - dev_err(&data->client->dev, - "failed to read temperature calibration parameters\n"); - return ret; - } - - comp->dig_t1 = (u16) le16_to_cpu(buf[0]); - comp->dig_t2 = (s16) le16_to_cpu(buf[1]); - comp->dig_t3 = (s16) le16_to_cpu(buf[2]); - - return 0; -} - -static int bmp280_read_compensation_press(struct bmp280_data *data, - struct bmp280_comp_press *comp) -{ - int ret; - __le16 buf[BMP280_COMP_PRESS_REG_COUNT / 2]; - - ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_PRESS_START, - buf, BMP280_COMP_PRESS_REG_COUNT); - if (ret < 0) { - dev_err(&data->client->dev, - "failed to read pressure calibration parameters\n"); - return ret; - } - - comp->dig_p1 = (u16) le16_to_cpu(buf[0]); - comp->dig_p2 = (s16) le16_to_cpu(buf[1]); - comp->dig_p3 = (s16) le16_to_cpu(buf[2]); - comp->dig_p4 = (s16) le16_to_cpu(buf[3]); - comp->dig_p5 = (s16) le16_to_cpu(buf[4]); - comp->dig_p6 = (s16) le16_to_cpu(buf[5]); - comp->dig_p7 = (s16) le16_to_cpu(buf[6]); - comp->dig_p8 = (s16) le16_to_cpu(buf[7]); - comp->dig_p9 = (s16) le16_to_cpu(buf[8]); - - return 0; -} - /* * Returns temperature in DegC, resolution is 0.01 DegC. Output value of * "5123" equals 51.23 DegC. t_fine carries fine temperature as global @@ -197,21 +145,35 @@ static int bmp280_read_compensation_press(struct bmp280_data *data, * Taken from datasheet, Section 3.11.3, "Compensation formula". */ static s32 bmp280_compensate_temp(struct bmp280_data *data, - struct bmp280_comp_temp *comp, s32 adc_temp) { - s32 var1, var2, t; + int ret; + s32 var1, var2; + __le16 buf[BMP280_COMP_TEMP_REG_COUNT / 2]; - var1 = (((adc_temp >> 3) - ((s32) comp->dig_t1 << 1)) * - ((s32) comp->dig_t2)) >> 11; - var2 = (((((adc_temp >> 4) - ((s32) comp->dig_t1)) * - ((adc_temp >> 4) - ((s32) comp->dig_t1))) >> 12) * - ((s32) comp->dig_t3)) >> 14; + ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_TEMP_START, + buf, BMP280_COMP_TEMP_REG_COUNT); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to read temperature calibration parameters\n"); + return ret; + } - data->t_fine = var1 + var2; - t = (data->t_fine * 5 + 128) >> 8; + /* + * The double casts are necessary because le16_to_cpu returns an + * unsigned 16-bit value. Casting that value directly to a + * signed 32-bit will not do proper sign extension. + * + * Conversely, T1 and P1 are unsigned values, so they can be + * cast straight to the larger type. + */ + var1 = (((adc_temp >> 3) - ((s32)le16_to_cpu(buf[T1]) << 1)) * + ((s32)(s16)le16_to_cpu(buf[T2]))) >> 11; + var2 = (((((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1]))) * + ((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1])))) >> 12) * + ((s32)(s16)le16_to_cpu(buf[T3]))) >> 14; - return t; + return (data->t_fine * 5 + 128) >> 8; } /* @@ -222,29 +184,38 @@ static s32 bmp280_compensate_temp(struct bmp280_data *data, * Taken from datasheet, Section 3.11.3, "Compensation formula". */ static u32 bmp280_compensate_press(struct bmp280_data *data, - struct bmp280_comp_press *comp, s32 adc_press) { + int ret; s64 var1, var2, p; + __le16 buf[BMP280_COMP_PRESS_REG_COUNT / 2]; + + ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_PRESS_START, + buf, BMP280_COMP_PRESS_REG_COUNT); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to read pressure calibration parameters\n"); + return ret; + } - var1 = ((s64) data->t_fine) - 128000; - var2 = var1 * var1 * (s64) comp->dig_p6; - var2 = var2 + ((var1 * (s64) comp->dig_p5) << 17); - var2 = var2 + (((s64) comp->dig_p4) << 35); - var1 = ((var1 * var1 * (s64) comp->dig_p3) >> 8) + - ((var1 * (s64) comp->dig_p2) << 12); - var1 = (((((s64) 1) << 47) + var1)) * ((s64) comp->dig_p1) >> 33; + var1 = ((s64)data->t_fine) - 128000; + var2 = var1 * var1 * (s64)(s16)le16_to_cpu(buf[P6]); + var2 += (var1 * (s64)(s16)le16_to_cpu(buf[P5])) << 17; + var2 += ((s64)(s16)le16_to_cpu(buf[P4])) << 35; + var1 = ((var1 * var1 * (s64)(s16)le16_to_cpu(buf[P3])) >> 8) + + ((var1 * (s64)(s16)le16_to_cpu(buf[P2])) << 12); + var1 = ((((s64)1) << 47) + var1) * ((s64)le16_to_cpu(buf[P1])) >> 33; if (var1 == 0) return 0; - p = ((((s64) 1048576 - adc_press) << 31) - var2) * 3125; + p = ((((s64)1048576 - adc_press) << 31) - var2) * 3125; p = div64_s64(p, var1); - var1 = (((s64) comp->dig_p9) * (p >> 13) * (p >> 13)) >> 25; - var2 = (((s64) comp->dig_p8) * p) >> 19; - p = ((p + var1 + var2) >> 8) + (((s64) comp->dig_p7) << 4); + var1 = (((s64)(s16)le16_to_cpu(buf[P9])) * (p >> 13) * (p >> 13)) >> 25; + var2 = (((s64)(s16)le16_to_cpu(buf[P8])) * p) >> 19; + p = ((p + var1 + var2) >> 8) + (((s64)(s16)le16_to_cpu(buf[P7])) << 4); - return (u32) p; + return (u32)p; } static int bmp280_read_temp(struct bmp280_data *data, @@ -253,11 +224,6 @@ static int bmp280_read_temp(struct bmp280_data *data, int ret; __be32 tmp = 0; s32 adc_temp, comp_temp; - struct bmp280_comp_temp comp; - - ret = bmp280_read_compensation_temp(data, &comp); - if (ret < 0) - return ret; ret = regmap_bulk_read(data->regmap, BMP280_REG_TEMP_MSB, (u8 *) &tmp, 3); @@ -267,7 +233,7 @@ static int bmp280_read_temp(struct bmp280_data *data, } adc_temp = be32_to_cpu(tmp) >> 12; - comp_temp = bmp280_compensate_temp(data, &comp, adc_temp); + comp_temp = bmp280_compensate_temp(data, adc_temp); /* * val might be NULL if we're called by the read_press routine, @@ -288,11 +254,6 @@ static int bmp280_read_press(struct bmp280_data *data, __be32 tmp = 0; s32 adc_press; u32 comp_press; - struct bmp280_comp_press comp; - - ret = bmp280_read_compensation_press(data, &comp); - if (ret < 0) - return ret; /* Read and compensate temperature so we get a reading of t_fine. */ ret = bmp280_read_temp(data, NULL); @@ -307,7 +268,7 @@ static int bmp280_read_press(struct bmp280_data *data, } adc_press = be32_to_cpu(tmp) >> 12; - comp_press = bmp280_compensate_press(data, &comp, adc_press); + comp_press = bmp280_compensate_press(data, adc_press); *val = comp_press; *val2 = 256000; @@ -366,7 +327,7 @@ static int bmp280_chip_init(struct bmp280_data *data) BMP280_MODE_NORMAL); if (ret < 0) { dev_err(&data->client->dev, - "failed to write config register\n"); + "failed to write ctrl_meas register\n"); return ret; } @@ -394,7 +355,6 @@ static int bmp280_probe(struct i2c_client *client, if (!indio_dev) return -ENOMEM; - i2c_set_clientdata(client, indio_dev); data = iio_priv(indio_dev); mutex_init(&data->lock); data->client = client; diff --git a/drivers/iio/pressure/hid-sensor-press.c b/drivers/iio/pressure/hid-sensor-press.c index ac150f0c8b02..7bb8d4c1f7df 100644 --- a/drivers/iio/pressure/hid-sensor-press.c +++ b/drivers/iio/pressure/hid-sensor-press.c @@ -79,7 +79,6 @@ static int press_read_raw(struct iio_dev *indio_dev, int report_id = -1; u32 address; int ret_type; - s32 poll_value; *val = 0; *val2 = 0; @@ -96,15 +95,8 @@ static int press_read_raw(struct iio_dev *indio_dev, break; } if (report_id >= 0) { - poll_value = hid_sensor_read_poll_value( - &press_state->common_attributes); - if (poll_value < 0) - return -EINVAL; hid_sensor_power_state(&press_state->common_attributes, true); - - msleep_interruptible(poll_value * 2); - *val = sensor_hub_input_attr_get_raw_value( press_state->common_attributes.hsdev, HID_USAGE_SENSOR_PRESSURE, address, @@ -383,6 +375,7 @@ static struct platform_driver hid_press_platform_driver = { .id_table = hid_press_ids, .driver = { .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, }, .probe = hid_press_probe, .remove = hid_press_remove, diff --git a/drivers/iio/proximity/Kconfig b/drivers/iio/proximity/Kconfig index 0c8cdf58f6a1..41a8d8ffa0de 100644 --- a/drivers/iio/proximity/Kconfig +++ b/drivers/iio/proximity/Kconfig @@ -17,3 +17,20 @@ config AS3935 module will be called as3935 endmenu + +menu "Proximity sensors" + +config SX9500 + tristate "SX9500 Semtech proximity sensor" + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select REGMAP_I2C + depends on I2C + help + Say Y here to build a driver for Semtech's SX9500 capacitive + proximity/button sensor. + + To compile this driver as a module, choose M here: the + module will be called sx9500. + +endmenu diff --git a/drivers/iio/proximity/Makefile b/drivers/iio/proximity/Makefile index 743adee1c8bf..9818dc562abd 100644 --- a/drivers/iio/proximity/Makefile +++ b/drivers/iio/proximity/Makefile @@ -4,3 +4,4 @@ # When adding new entries keep the list in alphabetical order obj-$(CONFIG_AS3935) += as3935.o +obj-$(CONFIG_SX9500) += sx9500.o diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c index 466aa4314667..bc0d68efd455 100644 --- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -273,9 +273,9 @@ static void calibrate_as3935(struct as3935_state *st) } #ifdef CONFIG_PM_SLEEP -static int as3935_suspend(struct spi_device *spi, pm_message_t msg) +static int as3935_suspend(struct device *dev) { - struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct iio_dev *indio_dev = dev_get_drvdata(dev); struct as3935_state *st = iio_priv(indio_dev); int val, ret; @@ -293,9 +293,9 @@ err_suspend: return ret; } -static int as3935_resume(struct spi_device *spi) +static int as3935_resume(struct device *dev) { - struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct iio_dev *indio_dev = dev_get_drvdata(dev); struct as3935_state *st = iio_priv(indio_dev); int val, ret; @@ -311,9 +311,12 @@ err_resume: return ret; } + +static SIMPLE_DEV_PM_OPS(as3935_pm_ops, as3935_suspend, as3935_resume); +#define AS3935_PM_OPS (&as3935_pm_ops) + #else -#define as3935_suspend NULL -#define as3935_resume NULL +#define AS3935_PM_OPS NULL #endif static int as3935_probe(struct spi_device *spi) @@ -441,12 +444,11 @@ static struct spi_driver as3935_driver = { .driver = { .name = "as3935", .owner = THIS_MODULE, + .pm = AS3935_PM_OPS, }, .probe = as3935_probe, .remove = as3935_remove, .id_table = as3935_id, - .suspend = as3935_suspend, - .resume = as3935_resume, }; module_spi_driver(as3935_driver); diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c new file mode 100644 index 000000000000..74dff4e4a11a --- /dev/null +++ b/drivers/iio/proximity/sx9500.c @@ -0,0 +1,752 @@ +/* + * Copyright (c) 2014 Intel Corporation + * + * Driver for Semtech's SX9500 capacitive proximity/button solution. + * Datasheet available at + * <http://www.semtech.com/images/datasheet/sx9500.pdf>. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/irq.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> +#include <linux/regmap.h> + +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/iio/trigger.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> + +#define SX9500_DRIVER_NAME "sx9500" +#define SX9500_IRQ_NAME "sx9500_event" +#define SX9500_GPIO_NAME "sx9500_gpio" + +/* Register definitions. */ +#define SX9500_REG_IRQ_SRC 0x00 +#define SX9500_REG_STAT 0x01 +#define SX9500_REG_IRQ_MSK 0x03 + +#define SX9500_REG_PROX_CTRL0 0x06 +#define SX9500_REG_PROX_CTRL1 0x07 +#define SX9500_REG_PROX_CTRL2 0x08 +#define SX9500_REG_PROX_CTRL3 0x09 +#define SX9500_REG_PROX_CTRL4 0x0a +#define SX9500_REG_PROX_CTRL5 0x0b +#define SX9500_REG_PROX_CTRL6 0x0c +#define SX9500_REG_PROX_CTRL7 0x0d +#define SX9500_REG_PROX_CTRL8 0x0e + +#define SX9500_REG_SENSOR_SEL 0x20 +#define SX9500_REG_USE_MSB 0x21 +#define SX9500_REG_USE_LSB 0x22 +#define SX9500_REG_AVG_MSB 0x23 +#define SX9500_REG_AVG_LSB 0x24 +#define SX9500_REG_DIFF_MSB 0x25 +#define SX9500_REG_DIFF_LSB 0x26 +#define SX9500_REG_OFFSET_MSB 0x27 +#define SX9500_REG_OFFSET_LSB 0x28 + +#define SX9500_REG_RESET 0x7f + +/* Write this to REG_RESET to do a soft reset. */ +#define SX9500_SOFT_RESET 0xde + +#define SX9500_SCAN_PERIOD_MASK GENMASK(6, 4) +#define SX9500_SCAN_PERIOD_SHIFT 4 + +/* + * These serve for identifying IRQ source in the IRQ_SRC register, and + * also for masking the IRQs in the IRQ_MSK register. + */ +#define SX9500_CLOSE_IRQ BIT(6) +#define SX9500_FAR_IRQ BIT(5) +#define SX9500_CONVDONE_IRQ BIT(3) + +#define SX9500_PROXSTAT_SHIFT 4 + +#define SX9500_NUM_CHANNELS 4 + +struct sx9500_data { + struct mutex mutex; + struct i2c_client *client; + struct iio_trigger *trig; + struct regmap *regmap; + /* + * Last reading of the proximity status for each channel. We + * only send an event to user space when this changes. + */ + bool prox_stat[SX9500_NUM_CHANNELS]; + bool event_enabled[SX9500_NUM_CHANNELS]; + bool trigger_enabled; + u16 *buffer; +}; + +static const struct iio_event_spec sx9500_events[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + }, +}; + +#define SX9500_CHANNEL(idx) \ + { \ + .type = IIO_PROXIMITY, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .indexed = 1, \ + .channel = idx, \ + .event_spec = sx9500_events, \ + .num_event_specs = ARRAY_SIZE(sx9500_events), \ + .scan_index = idx, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 16, \ + .storagebits = 16, \ + .shift = 0, \ + }, \ + } + +static const struct iio_chan_spec sx9500_channels[] = { + SX9500_CHANNEL(0), + SX9500_CHANNEL(1), + SX9500_CHANNEL(2), + SX9500_CHANNEL(3), + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct { + int val; + int val2; +} sx9500_samp_freq_table[] = { + {33, 333333}, + {16, 666666}, + {11, 111111}, + {8, 333333}, + {6, 666666}, + {5, 0}, + {3, 333333}, + {2, 500000}, +}; + +static const struct regmap_range sx9500_writable_reg_ranges[] = { + regmap_reg_range(SX9500_REG_IRQ_MSK, SX9500_REG_IRQ_MSK), + regmap_reg_range(SX9500_REG_PROX_CTRL0, SX9500_REG_PROX_CTRL8), + regmap_reg_range(SX9500_REG_SENSOR_SEL, SX9500_REG_SENSOR_SEL), + regmap_reg_range(SX9500_REG_OFFSET_MSB, SX9500_REG_OFFSET_LSB), + regmap_reg_range(SX9500_REG_RESET, SX9500_REG_RESET), +}; + +static const struct regmap_access_table sx9500_writeable_regs = { + .yes_ranges = sx9500_writable_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(sx9500_writable_reg_ranges), +}; + +/* + * All allocated registers are readable, so we just list unallocated + * ones. + */ +static const struct regmap_range sx9500_non_readable_reg_ranges[] = { + regmap_reg_range(SX9500_REG_STAT + 1, SX9500_REG_STAT + 1), + regmap_reg_range(SX9500_REG_IRQ_MSK + 1, SX9500_REG_PROX_CTRL0 - 1), + regmap_reg_range(SX9500_REG_PROX_CTRL8 + 1, SX9500_REG_SENSOR_SEL - 1), + regmap_reg_range(SX9500_REG_OFFSET_LSB + 1, SX9500_REG_RESET - 1), +}; + +static const struct regmap_access_table sx9500_readable_regs = { + .no_ranges = sx9500_non_readable_reg_ranges, + .n_no_ranges = ARRAY_SIZE(sx9500_non_readable_reg_ranges), +}; + +static const struct regmap_range sx9500_volatile_reg_ranges[] = { + regmap_reg_range(SX9500_REG_IRQ_SRC, SX9500_REG_STAT), + regmap_reg_range(SX9500_REG_USE_MSB, SX9500_REG_OFFSET_LSB), + regmap_reg_range(SX9500_REG_RESET, SX9500_REG_RESET), +}; + +static const struct regmap_access_table sx9500_volatile_regs = { + .yes_ranges = sx9500_volatile_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(sx9500_volatile_reg_ranges), +}; + +static const struct regmap_config sx9500_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = SX9500_REG_RESET, + .cache_type = REGCACHE_RBTREE, + + .wr_table = &sx9500_writeable_regs, + .rd_table = &sx9500_readable_regs, + .volatile_table = &sx9500_volatile_regs, +}; + +static int sx9500_read_proximity(struct sx9500_data *data, + const struct iio_chan_spec *chan, + int *val) +{ + int ret; + __be16 regval; + + ret = regmap_write(data->regmap, SX9500_REG_SENSOR_SEL, chan->channel); + if (ret < 0) + return ret; + + ret = regmap_bulk_read(data->regmap, SX9500_REG_USE_MSB, ®val, 2); + if (ret < 0) + return ret; + + *val = 32767 - (s16)be16_to_cpu(regval); + + return IIO_VAL_INT; +} + +static int sx9500_read_samp_freq(struct sx9500_data *data, + int *val, int *val2) +{ + int ret; + unsigned int regval; + + mutex_lock(&data->mutex); + ret = regmap_read(data->regmap, SX9500_REG_PROX_CTRL0, ®val); + mutex_unlock(&data->mutex); + + if (ret < 0) + return ret; + + regval = (regval & SX9500_SCAN_PERIOD_MASK) >> SX9500_SCAN_PERIOD_SHIFT; + *val = sx9500_samp_freq_table[regval].val; + *val2 = sx9500_samp_freq_table[regval].val2; + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int sx9500_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long mask) +{ + struct sx9500_data *data = iio_priv(indio_dev); + int ret; + + switch (chan->type) { + case IIO_PROXIMITY: + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + mutex_lock(&data->mutex); + ret = sx9500_read_proximity(data, chan, val); + mutex_unlock(&data->mutex); + return ret; + case IIO_CHAN_INFO_SAMP_FREQ: + return sx9500_read_samp_freq(data, val, val2); + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int sx9500_set_samp_freq(struct sx9500_data *data, + int val, int val2) +{ + int i, ret; + + for (i = 0; i < ARRAY_SIZE(sx9500_samp_freq_table); i++) + if (val == sx9500_samp_freq_table[i].val && + val2 == sx9500_samp_freq_table[i].val2) + break; + + if (i == ARRAY_SIZE(sx9500_samp_freq_table)) + return -EINVAL; + + mutex_lock(&data->mutex); + + ret = regmap_update_bits(data->regmap, SX9500_REG_PROX_CTRL0, + SX9500_SCAN_PERIOD_MASK, + i << SX9500_SCAN_PERIOD_SHIFT); + + mutex_unlock(&data->mutex); + + return ret; +} + +static int sx9500_write_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + int val, int val2, long mask) +{ + struct sx9500_data *data = iio_priv(indio_dev); + + switch (chan->type) { + case IIO_PROXIMITY: + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + return sx9500_set_samp_freq(data, val, val2); + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static irqreturn_t sx9500_irq_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct sx9500_data *data = iio_priv(indio_dev); + + if (data->trigger_enabled) + iio_trigger_poll(data->trig); + + /* + * Even if no event is enabled, we need to wake the thread to + * clear the interrupt state by reading SX9500_REG_IRQ_SRC. It + * is not possible to do that here because regmap_read takes a + * mutex. + */ + return IRQ_WAKE_THREAD; +} + +static irqreturn_t sx9500_irq_thread_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct sx9500_data *data = iio_priv(indio_dev); + int ret; + unsigned int val, chan; + + mutex_lock(&data->mutex); + + ret = regmap_read(data->regmap, SX9500_REG_IRQ_SRC, &val); + if (ret < 0) { + dev_err(&data->client->dev, "i2c transfer error in irq\n"); + goto out; + } + + if (!(val & (SX9500_CLOSE_IRQ | SX9500_FAR_IRQ))) + goto out; + + ret = regmap_read(data->regmap, SX9500_REG_STAT, &val); + if (ret < 0) { + dev_err(&data->client->dev, "i2c transfer error in irq\n"); + goto out; + } + + val >>= SX9500_PROXSTAT_SHIFT; + for (chan = 0; chan < SX9500_NUM_CHANNELS; chan++) { + int dir; + u64 ev; + bool new_prox = val & BIT(chan); + + if (!data->event_enabled[chan]) + continue; + if (new_prox == data->prox_stat[chan]) + /* No change on this channel. */ + continue; + + dir = new_prox ? IIO_EV_DIR_FALLING : + IIO_EV_DIR_RISING; + ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, + chan, + IIO_EV_TYPE_THRESH, + dir); + iio_push_event(indio_dev, ev, iio_get_time_ns()); + data->prox_stat[chan] = new_prox; + } + +out: + mutex_unlock(&data->mutex); + + return IRQ_HANDLED; +} + +static int sx9500_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct sx9500_data *data = iio_priv(indio_dev); + + if (chan->type != IIO_PROXIMITY || type != IIO_EV_TYPE_THRESH || + dir != IIO_EV_DIR_EITHER) + return -EINVAL; + + return data->event_enabled[chan->channel]; +} + +static int sx9500_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct sx9500_data *data = iio_priv(indio_dev); + int ret, i; + bool any_active = false; + unsigned int irqmask; + + if (chan->type != IIO_PROXIMITY || type != IIO_EV_TYPE_THRESH || + dir != IIO_EV_DIR_EITHER) + return -EINVAL; + + mutex_lock(&data->mutex); + + data->event_enabled[chan->channel] = state; + + for (i = 0; i < SX9500_NUM_CHANNELS; i++) + if (data->event_enabled[i]) { + any_active = true; + break; + } + + irqmask = SX9500_CLOSE_IRQ | SX9500_FAR_IRQ; + if (any_active) + ret = regmap_update_bits(data->regmap, SX9500_REG_IRQ_MSK, + irqmask, irqmask); + else + ret = regmap_update_bits(data->regmap, SX9500_REG_IRQ_MSK, + irqmask, 0); + + mutex_unlock(&data->mutex); + + return ret; +} + +static int sx9500_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct sx9500_data *data = iio_priv(indio_dev); + + mutex_lock(&data->mutex); + kfree(data->buffer); + data->buffer = kzalloc(indio_dev->scan_bytes, GFP_KERNEL); + mutex_unlock(&data->mutex); + + if (data->buffer == NULL) + return -ENOMEM; + + return 0; +} + +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( + "2.500000 3.333333 5 6.666666 8.333333 11.111111 16.666666 33.333333"); + +static struct attribute *sx9500_attributes[] = { + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group sx9500_attribute_group = { + .attrs = sx9500_attributes, +}; + +static const struct iio_info sx9500_info = { + .driver_module = THIS_MODULE, + .attrs = &sx9500_attribute_group, + .read_raw = &sx9500_read_raw, + .write_raw = &sx9500_write_raw, + .read_event_config = &sx9500_read_event_config, + .write_event_config = &sx9500_write_event_config, + .update_scan_mode = &sx9500_update_scan_mode, +}; + +static int sx9500_set_trigger_state(struct iio_trigger *trig, + bool state) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct sx9500_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + + ret = regmap_update_bits(data->regmap, SX9500_REG_IRQ_MSK, + SX9500_CONVDONE_IRQ, + state ? SX9500_CONVDONE_IRQ : 0); + if (ret == 0) + data->trigger_enabled = state; + + mutex_unlock(&data->mutex); + + return ret; +} + +static const struct iio_trigger_ops sx9500_trigger_ops = { + .set_trigger_state = sx9500_set_trigger_state, + .owner = THIS_MODULE, +}; + +static irqreturn_t sx9500_trigger_handler(int irq, void *private) +{ + struct iio_poll_func *pf = private; + struct iio_dev *indio_dev = pf->indio_dev; + struct sx9500_data *data = iio_priv(indio_dev); + int val, bit, ret, i = 0; + + mutex_lock(&data->mutex); + + for_each_set_bit(bit, indio_dev->buffer->scan_mask, + indio_dev->masklength) { + ret = sx9500_read_proximity(data, &indio_dev->channels[bit], + &val); + if (ret < 0) + goto out; + + data->buffer[i++] = val; + } + + iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, + iio_get_time_ns()); + +out: + mutex_unlock(&data->mutex); + + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +struct sx9500_reg_default { + u8 reg; + u8 def; +}; + +static const struct sx9500_reg_default sx9500_default_regs[] = { + { + .reg = SX9500_REG_PROX_CTRL1, + /* Shield enabled, small range. */ + .def = 0x43, + }, + { + .reg = SX9500_REG_PROX_CTRL2, + /* x8 gain, 167kHz frequency, finest resolution. */ + .def = 0x77, + }, + { + .reg = SX9500_REG_PROX_CTRL3, + /* Doze enabled, 2x scan period doze, no raw filter. */ + .def = 0x40, + }, + { + .reg = SX9500_REG_PROX_CTRL4, + /* Average threshold. */ + .def = 0x30, + }, + { + .reg = SX9500_REG_PROX_CTRL5, + /* + * Debouncer off, lowest average negative filter, + * highest average postive filter. + */ + .def = 0x0f, + }, + { + .reg = SX9500_REG_PROX_CTRL6, + /* Proximity detection threshold: 280 */ + .def = 0x0e, + }, + { + .reg = SX9500_REG_PROX_CTRL7, + /* + * No automatic compensation, compensate each pin + * independently, proximity hysteresis: 32, close + * debouncer off, far debouncer off. + */ + .def = 0x00, + }, + { + .reg = SX9500_REG_PROX_CTRL8, + /* No stuck timeout, no periodic compensation. */ + .def = 0x00, + }, + { + .reg = SX9500_REG_PROX_CTRL0, + /* Scan period: 30ms, all sensors enabled. */ + .def = 0x0f, + }, +}; + +static int sx9500_init_device(struct iio_dev *indio_dev) +{ + struct sx9500_data *data = iio_priv(indio_dev); + int ret, i; + unsigned int val; + + ret = regmap_write(data->regmap, SX9500_REG_IRQ_MSK, 0); + if (ret < 0) + return ret; + + ret = regmap_write(data->regmap, SX9500_REG_RESET, + SX9500_SOFT_RESET); + if (ret < 0) + return ret; + + ret = regmap_read(data->regmap, SX9500_REG_IRQ_SRC, &val); + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(sx9500_default_regs); i++) { + ret = regmap_write(data->regmap, + sx9500_default_regs[i].reg, + sx9500_default_regs[i].def); + if (ret < 0) + return ret; + } + + return 0; +} + +static int sx9500_gpio_probe(struct i2c_client *client, + struct sx9500_data *data) +{ + struct device *dev; + struct gpio_desc *gpio; + int ret; + + if (!client) + return -EINVAL; + + dev = &client->dev; + + /* data ready gpio interrupt pin */ + gpio = devm_gpiod_get_index(dev, SX9500_GPIO_NAME, 0); + if (IS_ERR(gpio)) { + dev_err(dev, "acpi gpio get index failed\n"); + return PTR_ERR(gpio); + } + + ret = gpiod_direction_input(gpio); + if (ret) + return ret; + + ret = gpiod_to_irq(gpio); + + dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); + + return ret; +} + +static int sx9500_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct iio_dev *indio_dev; + struct sx9500_data *data; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (indio_dev == NULL) + return -ENOMEM; + + data = iio_priv(indio_dev); + data->client = client; + mutex_init(&data->mutex); + data->trigger_enabled = false; + + data->regmap = devm_regmap_init_i2c(client, &sx9500_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + sx9500_init_device(indio_dev); + + indio_dev->dev.parent = &client->dev; + indio_dev->name = SX9500_DRIVER_NAME; + indio_dev->channels = sx9500_channels; + indio_dev->num_channels = ARRAY_SIZE(sx9500_channels); + indio_dev->info = &sx9500_info; + indio_dev->modes = INDIO_DIRECT_MODE; + i2c_set_clientdata(client, indio_dev); + + if (client->irq <= 0) + client->irq = sx9500_gpio_probe(client, data); + + if (client->irq > 0) { + ret = devm_request_threaded_irq(&client->dev, client->irq, + sx9500_irq_handler, sx9500_irq_thread_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + SX9500_IRQ_NAME, indio_dev); + if (ret < 0) + return ret; + + data->trig = devm_iio_trigger_alloc(&client->dev, + "%s-dev%d", indio_dev->name, indio_dev->id); + if (!data->trig) + return -ENOMEM; + + data->trig->dev.parent = &client->dev; + data->trig->ops = &sx9500_trigger_ops; + iio_trigger_set_drvdata(data->trig, indio_dev); + + ret = iio_trigger_register(data->trig); + if (ret) + return ret; + } + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + sx9500_trigger_handler, NULL); + if (ret < 0) + goto out_trigger_unregister; + + ret = iio_device_register(indio_dev); + if (ret < 0) + goto out_buffer_cleanup; + + return 0; + +out_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); +out_trigger_unregister: + if (client->irq > 0) + iio_trigger_unregister(data->trig); + + return ret; +} + +static int sx9500_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct sx9500_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (client->irq > 0) + iio_trigger_unregister(data->trig); + kfree(data->buffer); + + return 0; +} + +static const struct acpi_device_id sx9500_acpi_match[] = { + {"SSX9500", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, sx9500_acpi_match); + +static const struct i2c_device_id sx9500_id[] = { + {"sx9500", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, sx9500_id); + +static struct i2c_driver sx9500_driver = { + .driver = { + .name = SX9500_DRIVER_NAME, + .acpi_match_table = ACPI_PTR(sx9500_acpi_match), + }, + .probe = sx9500_probe, + .remove = sx9500_remove, + .id_table = sx9500_id, +}; +module_i2c_driver(sx9500_driver); + +MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); +MODULE_DESCRIPTION("Driver for Semtech SX9500 proximity sensor"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/trigger/iio-trig-sysfs.c b/drivers/iio/trigger/iio-trig-sysfs.c index 254c7e906127..3dfab2bc6d69 100644 --- a/drivers/iio/trigger/iio-trig-sysfs.c +++ b/drivers/iio/trigger/iio-trig-sysfs.c @@ -135,6 +135,7 @@ static int iio_sysfs_trigger_probe(int id) struct iio_sysfs_trig *t; int ret; bool foundit = false; + mutex_lock(&iio_sysfs_trig_list_mut); list_for_each_entry(t, &iio_sysfs_trig_list, l) if (id == t->id) { @@ -185,6 +186,7 @@ static int iio_sysfs_trigger_remove(int id) { bool foundit = false; struct iio_sysfs_trig *t; + mutex_lock(&iio_sysfs_trig_list_mut); list_for_each_entry(t, &iio_sysfs_trig_list, l) if (id == t->id) { |
