diff options
Diffstat (limited to 'drivers/iio')
40 files changed, 5056 insertions, 299 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index d4984c8be973..6e3f143fc71d 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -1,5 +1,5 @@ # -# Industrial I/O subsytem configuration +# Industrial I/O subsystem configuration # menuconfig IIO @@ -54,10 +54,15 @@ config IIO_CONSUMERS_PER_TRIGGER This value controls the maximum number of consumers that a given trigger may handle. Default is 2. +source "drivers/iio/accel/Kconfig" source "drivers/iio/adc/Kconfig" source "drivers/iio/amplifiers/Kconfig" source "drivers/iio/light/Kconfig" source "drivers/iio/frequency/Kconfig" source "drivers/iio/dac/Kconfig" +source "drivers/iio/common/Kconfig" +source "drivers/iio/gyro/Kconfig" +source "drivers/iio/light/Kconfig" +source "drivers/iio/magnetometer/Kconfig" endif # IIO diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index 34309abb7979..f7fa3c0867b4 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -10,8 +10,13 @@ industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o +obj-y += accel/ obj-y += adc/ obj-y += amplifiers/ obj-y += light/ obj-y += frequency/ obj-y += dac/ +obj-y += common/ +obj-y += gyro/ +obj-y += light/ +obj-y += magnetometer/ diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig new file mode 100644 index 000000000000..b2510c4d9a5a --- /dev/null +++ b/drivers/iio/accel/Kconfig @@ -0,0 +1,16 @@ +# +# Accelerometer drivers +# +menu "Accelerometers" + +config HID_SENSOR_ACCEL_3D + depends on HID_SENSOR_HUB + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select HID_SENSOR_IIO_COMMON + tristate "HID Acelerometers 3D" + help + Say yes here to build support for the HID SENSOR + accelerometers 3D. + +endmenu diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile new file mode 100644 index 000000000000..5bc6855a973e --- /dev/null +++ b/drivers/iio/accel/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for industrial I/O accelerometer drivers +# + +obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c new file mode 100644 index 000000000000..314a4057879e --- /dev/null +++ b/drivers/iio/accel/hid-sensor-accel-3d.c @@ -0,0 +1,418 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include "../common/hid-sensors/hid-sensor-attributes.h" +#include "../common/hid-sensors/hid-sensor-trigger.h" + +/*Format: HID-SENSOR-usage_id_in_hex*/ +/*Usage ID from spec for Accelerometer-3D: 0x200073*/ +#define DRIVER_NAME "HID-SENSOR-200073" + +enum accel_3d_channel { + CHANNEL_SCAN_INDEX_X, + CHANNEL_SCAN_INDEX_Y, + CHANNEL_SCAN_INDEX_Z, + ACCEL_3D_CHANNEL_MAX, +}; + +struct accel_3d_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_iio_common common_attributes; + struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX]; + u32 accel_val[ACCEL_3D_CHANNEL_MAX]; +}; + +static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = { + HID_USAGE_SENSOR_ACCEL_X_AXIS, + HID_USAGE_SENSOR_ACCEL_Y_AXIS, + HID_USAGE_SENSOR_ACCEL_Z_AXIS +}; + +/* Channel definitions */ +static const struct iio_chan_spec accel_3d_channels[] = { + { + .type = IIO_ACCEL, + .modified = 1, + .channel2 = IIO_MOD_X, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_X, + }, { + .type = IIO_ACCEL, + .modified = 1, + .channel2 = IIO_MOD_Y, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Y, + }, { + .type = IIO_ACCEL, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Z, + } +}; + +/* Adjust channel real bits based on report descriptor */ +static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, + int channel, int size) +{ + channels[channel].scan_type.sign = 's'; + /* Real storage bits will change based on the report desc. */ + channels[channel].scan_type.realbits = size * 8; + /* Maximum size of a sample to capture is u32 */ + channels[channel].scan_type.storagebits = sizeof(u32) * 8; +} + +/* Channel read_raw handler */ +static int accel_3d_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct accel_3d_state *accel_state = iio_priv(indio_dev); + int report_id = -1; + u32 address; + int ret; + int ret_type; + + *val = 0; + *val2 = 0; + switch (mask) { + case 0: + report_id = accel_state->accel[chan->scan_index].report_id; + address = accel_3d_addresses[chan->scan_index]; + if (report_id >= 0) + *val = sensor_hub_input_attr_get_raw_value( + accel_state->common_attributes.hsdev, + HID_USAGE_SENSOR_ACCEL_3D, address, + report_id); + else { + *val = 0; + return -EINVAL; + } + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = accel_state->accel[CHANNEL_SCAN_INDEX_X].units; + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OFFSET: + *val = hid_sensor_convert_exponent( + accel_state->accel[CHANNEL_SCAN_INDEX_X].unit_expo); + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_read_samp_freq_value( + &accel_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_read_raw_hyst_value( + &accel_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + default: + ret_type = -EINVAL; + break; + } + + return ret_type; +} + +/* Channel write_raw handler */ +static int accel_3d_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct accel_3d_state *accel_state = iio_priv(indio_dev); + int ret = 0; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_write_samp_freq_value( + &accel_state->common_attributes, val, val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_write_raw_hyst_value( + &accel_state->common_attributes, val, val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int accel_3d_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT_PLUS_MICRO; +} + +static const struct iio_info accel_3d_info = { + .driver_module = THIS_MODULE, + .read_raw = &accel_3d_read_raw, + .write_raw = &accel_3d_write_raw, + .write_raw_get_fmt = &accel_3d_write_raw_get_fmt, +}; + +/* Function to push data to buffer */ +static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) +{ + struct iio_buffer *buffer = indio_dev->buffer; + int datum_sz; + + dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); + if (!buffer) { + dev_err(&indio_dev->dev, "Buffer == NULL\n"); + return; + } + datum_sz = buffer->access->get_bytes_per_datum(buffer); + if (len > datum_sz) { + dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, + datum_sz); + return; + } + iio_push_to_buffer(buffer, (u8 *)data); +} + +/* Callback handler to send event after all samples are received and captured */ +static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct accel_3d_state *accel_state = iio_priv(indio_dev); + + dev_dbg(&indio_dev->dev, "accel_3d_proc_event [%d]\n", + accel_state->common_attributes.data_ready); + if (accel_state->common_attributes.data_ready) + hid_sensor_push_data(indio_dev, + (u8 *)accel_state->accel_val, + sizeof(accel_state->accel_val)); + + return 0; +} + +/* Capture samples in local storage */ +static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + size_t raw_len, char *raw_data, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct accel_3d_state *accel_state = iio_priv(indio_dev); + int offset; + int ret = -EINVAL; + + switch (usage_id) { + case HID_USAGE_SENSOR_ACCEL_X_AXIS: + case HID_USAGE_SENSOR_ACCEL_Y_AXIS: + case HID_USAGE_SENSOR_ACCEL_Z_AXIS: + offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS; + accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] = + *(u32 *)raw_data; + ret = 0; + break; + default: + break; + } + + return ret; +} + +/* Parse report which is specific to an usage id*/ +static int accel_3d_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + struct iio_chan_spec *channels, + unsigned usage_id, + struct accel_3d_state *st) +{ + int ret; + int i; + + for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { + ret = sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, + usage_id, + HID_USAGE_SENSOR_ACCEL_X_AXIS + i, + &st->accel[CHANNEL_SCAN_INDEX_X + i]); + if (ret < 0) + break; + accel_3d_adjust_channel_bit_mask(channels, + CHANNEL_SCAN_INDEX_X + i, + st->accel[CHANNEL_SCAN_INDEX_X + i].size); + } + dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n", + st->accel[0].index, + st->accel[0].report_id, + st->accel[1].index, st->accel[1].report_id, + st->accel[2].index, st->accel[2].report_id); + + return ret; +} + +/* Function to initialize the processing for usage id */ +static int __devinit hid_accel_3d_probe(struct platform_device *pdev) +{ + int ret = 0; + static const char *name = "accel_3d"; + struct iio_dev *indio_dev; + struct accel_3d_state *accel_state; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_chan_spec *channels; + + indio_dev = iio_device_alloc(sizeof(struct accel_3d_state)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + platform_set_drvdata(pdev, indio_dev); + + accel_state = iio_priv(indio_dev); + accel_state->common_attributes.hsdev = hsdev; + accel_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_ACCEL_3D, + &accel_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes\n"); + goto error_free_dev; + } + + channels = kmemdup(accel_3d_channels, + sizeof(accel_3d_channels), + GFP_KERNEL); + if (!channels) { + dev_err(&pdev->dev, "failed to duplicate channels\n"); + goto error_free_dev; + } + + ret = accel_3d_parse_report(pdev, hsdev, channels, + HID_USAGE_SENSOR_ACCEL_3D, accel_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes\n"); + goto error_free_dev_mem; + } + + indio_dev->channels = channels; + indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels); + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &accel_3d_info; + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + NULL, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); + goto error_free_dev_mem; + } + accel_state->common_attributes.data_ready = false; + ret = hid_sensor_setup_trigger(indio_dev, name, + &accel_state->common_attributes); + if (ret < 0) { + dev_err(&pdev->dev, "trigger setup failed\n"); + goto error_unreg_buffer_funcs; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&pdev->dev, "device register failed\n"); + goto error_remove_trigger; + } + + accel_state->callbacks.send_event = accel_3d_proc_event; + accel_state->callbacks.capture_sample = accel_3d_capture_sample; + accel_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D, + &accel_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "callback reg failed\n"); + goto error_iio_unreg; + } + + return ret; + +error_iio_unreg: + iio_device_unregister(indio_dev); +error_remove_trigger: + hid_sensor_remove_trigger(indio_dev); +error_unreg_buffer_funcs: + iio_triggered_buffer_cleanup(indio_dev); +error_free_dev_mem: + kfree(indio_dev->channels); +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +/* Function to deinitialize the processing for usage id */ +static int __devinit hid_accel_3d_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D); + iio_device_unregister(indio_dev); + hid_sensor_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + kfree(indio_dev->channels); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver hid_accel_3d_platform_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = hid_accel_3d_probe, + .remove = hid_accel_3d_remove, +}; +module_platform_driver(hid_accel_3d_platform_driver); + +MODULE_DESCRIPTION("HID Sensor Accel 3D"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 8a78b4f3ef58..492758120338 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -3,6 +3,11 @@ # menu "Analog to digital converters" +config AD_SIGMA_DELTA + tristate + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + config AD7266 tristate "Analog Devices AD7265/AD7266 ADC driver" depends on SPI_MASTER @@ -13,6 +18,33 @@ config AD7266 Say yes here to build support for Analog Devices AD7265 and AD7266 ADCs. +config AD7791 + tristate "Analog Devices AD7791 ADC driver" + depends on SPI + select AD_SIGMA_DELTA + help + Say yes here to build support for Analog Devices AD7787, AD7788, AD7789, + AD7790 and AD7791 SPI analog to digital converters (ADC). If unsure, say + N (but it is safe to say "Y"). + + To compile this driver as a module, choose M here: the module will be + called ad7791. + +config AD7476 + tristate "Analog Devices AD7476 and similar 1-channel ADCs driver" + depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Analog Devices AD7273, AD7274, AD7276, + AD7277, AD7278, AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468, + AD7495, AD7910, AD7920, AD7920 SPI analog to digital converters (ADC). + + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called ad7476. + config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 @@ -22,4 +54,10 @@ config AT91_ADC help Say yes here to build support for Atmel AT91 ADC. +config LP8788_ADC + bool "LP8788 ADC driver" + depends on MFD_LP8788 + help + Say yes here to build support for TI LP8788 ADC. + endmenu diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 52eec254c38c..900995d5e179 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -2,5 +2,9 @@ # Makefile for IIO ADC drivers # +obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o obj-$(CONFIG_AD7266) += ad7266.o +obj-$(CONFIG_AD7476) += ad7476.o +obj-$(CONFIG_AD7791) += ad7791.o obj-$(CONFIG_AT91_ADC) += at91_adc.o +obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c index 5c3f1ba5a06d..b11f214779a2 100644 --- a/drivers/iio/adc/ad7266.c +++ b/drivers/iio/adc/ad7266.c @@ -99,7 +99,7 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p) if (ret == 0) { if (indio_dev->scan_timestamp) ((s64 *)st->data)[1] = pf->timestamp; - iio_push_to_buffer(buffer, (u8 *)st->data, pf->timestamp); + iio_push_to_buffer(buffer, (u8 *)st->data); } iio_trigger_notify_done(indio_dev->trig); diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c new file mode 100644 index 000000000000..7f2f45a0a48d --- /dev/null +++ b/drivers/iio/adc/ad7476.c @@ -0,0 +1,332 @@ +/* + * AD7466/7/8 AD7476/5/7/8 (A) SPI ADC driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#define RES_MASK(bits) ((1 << (bits)) - 1) + +struct ad7476_state; + +struct ad7476_chip_info { + unsigned int int_vref_uv; + struct iio_chan_spec channel[2]; + void (*reset)(struct ad7476_state *); +}; + +struct ad7476_state { + struct spi_device *spi; + const struct ad7476_chip_info *chip_info; + struct regulator *reg; + struct spi_transfer xfer; + struct spi_message msg; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + * Make the buffer large enough for one 16 bit sample and one 64 bit + * aligned 64 bit timestamp. + */ + unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)] + ____cacheline_aligned; +}; + +enum ad7476_supported_device_ids { + ID_AD7091R, + ID_AD7276, + ID_AD7277, + ID_AD7278, + ID_AD7466, + ID_AD7467, + ID_AD7468, + ID_AD7495, + ID_AD7940, +}; + +static irqreturn_t ad7476_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad7476_state *st = iio_priv(indio_dev); + s64 time_ns; + int b_sent; + + b_sent = spi_sync(st->spi, &st->msg); + if (b_sent < 0) + goto done; + + time_ns = iio_get_time_ns(); + + if (indio_dev->scan_timestamp) + ((s64 *)st->data)[1] = time_ns; + + iio_push_to_buffer(indio_dev->buffer, st->data); +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static void ad7091_reset(struct ad7476_state *st) +{ + /* Any transfers with 8 scl cycles will reset the device */ + spi_read(st->spi, st->data, 1); +} + +static int ad7476_scan_direct(struct ad7476_state *st) +{ + int ret; + + ret = spi_sync(st->spi, &st->msg); + if (ret) + return ret; + + return be16_to_cpup((__be16 *)st->data); +} + +static int ad7476_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret; + struct ad7476_state *st = iio_priv(indio_dev); + int scale_uv; + + switch (m) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) + ret = -EBUSY; + else + ret = ad7476_scan_direct(st); + mutex_unlock(&indio_dev->mlock); + + if (ret < 0) + return ret; + *val = (ret >> st->chip_info->channel[0].scan_type.shift) & + RES_MASK(st->chip_info->channel[0].scan_type.realbits); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (!st->chip_info->int_vref_uv) { + scale_uv = regulator_get_voltage(st->reg); + if (scale_uv < 0) + return scale_uv; + } else { + scale_uv = st->chip_info->int_vref_uv; + } + scale_uv >>= chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; +} + +#define _AD7476_CHAN(bits, _shift, _info_mask) \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .info_mask = _info_mask | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = (_shift), \ + .endianness = IIO_BE, \ + }, \ +} + +#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) +#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) +#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0) + +static const struct ad7476_chip_info ad7476_chip_info_tbl[] = { + [ID_AD7091R] = { + .channel[0] = AD7091R_CHAN(12), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + .reset = ad7091_reset, + }, + [ID_AD7276] = { + .channel[0] = AD7940_CHAN(12), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7277] = { + .channel[0] = AD7940_CHAN(10), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7278] = { + .channel[0] = AD7940_CHAN(8), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7466] = { + .channel[0] = AD7476_CHAN(12), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7467] = { + .channel[0] = AD7476_CHAN(10), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7468] = { + .channel[0] = AD7476_CHAN(8), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, + [ID_AD7495] = { + .channel[0] = AD7476_CHAN(12), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + .int_vref_uv = 2500000, + }, + [ID_AD7940] = { + .channel[0] = AD7940_CHAN(14), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, +}; + +static const struct iio_info ad7476_info = { + .driver_module = THIS_MODULE, + .read_raw = &ad7476_read_raw, +}; + +static int __devinit ad7476_probe(struct spi_device *spi) +{ + struct ad7476_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + st->chip_info = + &ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + st->reg = regulator_get(&spi->dev, "vcc"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto error_free_dev; + } + + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + + /* Establish that the iio_dev is a child of the spi device */ + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channel; + indio_dev->num_channels = 2; + indio_dev->info = &ad7476_info; + /* Setup default message */ + + st->xfer.rx_buf = &st->data; + st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8; + + spi_message_init(&st->msg); + spi_message_add_tail(&st->xfer, &st->msg); + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &ad7476_trigger_handler, NULL); + if (ret) + goto error_disable_reg; + + if (st->chip_info->reset) + st->chip_info->reset(st); + + ret = iio_device_register(indio_dev); + if (ret) + goto error_ring_unregister; + return 0; + +error_ring_unregister: + iio_triggered_buffer_cleanup(indio_dev); +error_disable_reg: + regulator_disable(st->reg); +error_put_reg: + regulator_put(st->reg); +error_free_dev: + iio_device_free(indio_dev); + +error_ret: + return ret; +} + +static int __devexit ad7476_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7476_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + regulator_disable(st->reg); + regulator_put(st->reg); + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7476_id[] = { + {"ad7091r", ID_AD7091R}, + {"ad7273", ID_AD7277}, + {"ad7274", ID_AD7276}, + {"ad7276", ID_AD7276}, + {"ad7277", ID_AD7277}, + {"ad7278", ID_AD7278}, + {"ad7466", ID_AD7466}, + {"ad7467", ID_AD7467}, + {"ad7468", ID_AD7468}, + {"ad7475", ID_AD7466}, + {"ad7476", ID_AD7466}, + {"ad7476a", ID_AD7466}, + {"ad7477", ID_AD7467}, + {"ad7477a", ID_AD7467}, + {"ad7478", ID_AD7468}, + {"ad7478a", ID_AD7468}, + {"ad7495", ID_AD7495}, + {"ad7910", ID_AD7467}, + {"ad7920", ID_AD7466}, + {"ad7940", ID_AD7940}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7476_id); + +static struct spi_driver ad7476_driver = { + .driver = { + .name = "ad7476", + .owner = THIS_MODULE, + }, + .probe = ad7476_probe, + .remove = __devexit_p(ad7476_remove), + .id_table = ad7476_id, +}; +module_spi_driver(ad7476_driver); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c new file mode 100644 index 000000000000..e93740843b2b --- /dev/null +++ b/drivers/iio/adc/ad7791.c @@ -0,0 +1,460 @@ +/* + * AD7787/AD7788/AD7789/AD7790/AD7791 SPI ADC driver + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/adc/ad_sigma_delta.h> + +#include <linux/platform_data/ad7791.h> + +#define AD7791_REG_COMM 0x0 /* For writes */ +#define AD7791_REG_STATUS 0x0 /* For reads */ +#define AD7791_REG_MODE 0x1 +#define AD7791_REG_FILTER 0x2 +#define AD7791_REG_DATA 0x3 + +#define AD7791_MODE_CONTINUOUS 0x00 +#define AD7791_MODE_SINGLE 0x02 +#define AD7791_MODE_POWERDOWN 0x03 + +#define AD7791_CH_AIN1P_AIN1N 0x00 +#define AD7791_CH_AIN2 0x01 +#define AD7791_CH_AIN1N_AIN1N 0x02 +#define AD7791_CH_AVDD_MONITOR 0x03 + +#define AD7791_FILTER_CLK_DIV_1 (0x0 << 4) +#define AD7791_FILTER_CLK_DIV_2 (0x1 << 4) +#define AD7791_FILTER_CLK_DIV_4 (0x2 << 4) +#define AD7791_FILTER_CLK_DIV_8 (0x3 << 4) +#define AD7791_FILTER_CLK_MASK (0x3 << 4) +#define AD7791_FILTER_RATE_120 0x0 +#define AD7791_FILTER_RATE_100 0x1 +#define AD7791_FILTER_RATE_33_3 0x2 +#define AD7791_FILTER_RATE_20 0x3 +#define AD7791_FILTER_RATE_16_6 0x4 +#define AD7791_FILTER_RATE_16_7 0x5 +#define AD7791_FILTER_RATE_13_3 0x6 +#define AD7791_FILTER_RATE_9_5 0x7 +#define AD7791_FILTER_RATE_MASK 0x7 + +#define AD7791_MODE_BUFFER BIT(1) +#define AD7791_MODE_UNIPOLAR BIT(2) +#define AD7791_MODE_BURNOUT BIT(3) +#define AD7791_MODE_SEL_MASK (0x3 << 6) +#define AD7791_MODE_SEL(x) ((x) << 6) + +#define DECLARE_AD7787_CHANNELS(name, bits, storagebits) \ +const struct iio_chan_spec name[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7791_CH_AIN1P_AIN1N, \ + (bits), (storagebits), 0), \ + AD_SD_CHANNEL(1, 1, AD7791_CH_AIN2, (bits), (storagebits), 0), \ + AD_SD_SHORTED_CHANNEL(2, 0, AD7791_CH_AIN1N_AIN1N, \ + (bits), (storagebits), 0), \ + AD_SD_SUPPLY_CHANNEL(3, 2, AD7791_CH_AVDD_MONITOR, \ + (bits), (storagebits), 0), \ + IIO_CHAN_SOFT_TIMESTAMP(4), \ +} + +#define DECLARE_AD7791_CHANNELS(name, bits, storagebits) \ +const struct iio_chan_spec name[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7791_CH_AIN1P_AIN1N, \ + (bits), (storagebits), 0), \ + AD_SD_SHORTED_CHANNEL(1, 0, AD7791_CH_AIN1N_AIN1N, \ + (bits), (storagebits), 0), \ + AD_SD_SUPPLY_CHANNEL(2, 1, AD7791_CH_AVDD_MONITOR, \ + (bits), (storagebits), 0), \ + IIO_CHAN_SOFT_TIMESTAMP(3), \ +} + +static DECLARE_AD7787_CHANNELS(ad7787_channels, 24, 32); +static DECLARE_AD7791_CHANNELS(ad7790_channels, 16, 16); +static DECLARE_AD7791_CHANNELS(ad7791_channels, 24, 32); + +enum { + AD7787, + AD7788, + AD7789, + AD7790, + AD7791, +}; + +enum ad7791_chip_info_flags { + AD7791_FLAG_HAS_FILTER = (1 << 0), + AD7791_FLAG_HAS_BUFFER = (1 << 1), + AD7791_FLAG_HAS_UNIPOLAR = (1 << 2), + AD7791_FLAG_HAS_BURNOUT = (1 << 3), +}; + +struct ad7791_chip_info { + const struct iio_chan_spec *channels; + unsigned int num_channels; + enum ad7791_chip_info_flags flags; +}; + +static const struct ad7791_chip_info ad7791_chip_infos[] = { + [AD7787] = { + .channels = ad7787_channels, + .num_channels = ARRAY_SIZE(ad7787_channels), + .flags = AD7791_FLAG_HAS_FILTER | AD7791_FLAG_HAS_BUFFER | + AD7791_FLAG_HAS_UNIPOLAR | AD7791_FLAG_HAS_BURNOUT, + }, + [AD7788] = { + .channels = ad7790_channels, + .num_channels = ARRAY_SIZE(ad7790_channels), + .flags = AD7791_FLAG_HAS_UNIPOLAR, + }, + [AD7789] = { + .channels = ad7791_channels, + .num_channels = ARRAY_SIZE(ad7791_channels), + .flags = AD7791_FLAG_HAS_UNIPOLAR, + }, + [AD7790] = { + .channels = ad7790_channels, + .num_channels = ARRAY_SIZE(ad7790_channels), + .flags = AD7791_FLAG_HAS_FILTER | AD7791_FLAG_HAS_BUFFER | + AD7791_FLAG_HAS_BURNOUT, + }, + [AD7791] = { + .channels = ad7791_channels, + .num_channels = ARRAY_SIZE(ad7791_channels), + .flags = AD7791_FLAG_HAS_FILTER | AD7791_FLAG_HAS_BUFFER | + AD7791_FLAG_HAS_UNIPOLAR | AD7791_FLAG_HAS_BURNOUT, + }, +}; + +struct ad7791_state { + struct ad_sigma_delta sd; + uint8_t mode; + uint8_t filter; + + struct regulator *reg; + const struct ad7791_chip_info *info; +}; + +static struct ad7791_state *ad_sigma_delta_to_ad7791(struct ad_sigma_delta *sd) +{ + return container_of(sd, struct ad7791_state, sd); +} + +static int ad7791_set_channel(struct ad_sigma_delta *sd, unsigned int channel) +{ + ad_sd_set_comm(sd, channel); + + return 0; +} + +static int ad7791_set_mode(struct ad_sigma_delta *sd, + enum ad_sigma_delta_mode mode) +{ + struct ad7791_state *st = ad_sigma_delta_to_ad7791(sd); + + switch (mode) { + case AD_SD_MODE_CONTINUOUS: + mode = AD7791_MODE_CONTINUOUS; + break; + case AD_SD_MODE_SINGLE: + mode = AD7791_MODE_SINGLE; + break; + case AD_SD_MODE_IDLE: + case AD_SD_MODE_POWERDOWN: + mode = AD7791_MODE_POWERDOWN; + break; + } + + st->mode &= ~AD7791_MODE_SEL_MASK; + st->mode |= AD7791_MODE_SEL(mode); + + return ad_sd_write_reg(sd, AD7791_REG_MODE, sizeof(st->mode), st->mode); +} + +static const struct ad_sigma_delta_info ad7791_sigma_delta_info = { + .set_channel = ad7791_set_channel, + .set_mode = ad7791_set_mode, + .has_registers = true, + .addr_shift = 4, + .read_mask = BIT(3), +}; + +static int ad7791_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val, int *val2, long info) +{ + struct ad7791_state *st = iio_priv(indio_dev); + bool unipolar = !!(st->mode & AD7791_MODE_UNIPOLAR); + unsigned long long scale_pv; + + switch (info) { + case IIO_CHAN_INFO_RAW: + return ad_sigma_delta_single_conversion(indio_dev, chan, val); + case IIO_CHAN_INFO_OFFSET: + /** + * Unipolar: 0 to VREF + * Bipolar -VREF to VREF + **/ + if (unipolar) + *val = 0; + else + *val = -(1 << (chan->scan_type.realbits - 1)); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + /* The monitor channel uses an internal reference. */ + if (chan->address == AD7791_CH_AVDD_MONITOR) { + scale_pv = 5850000000000ULL; + } else { + int voltage_uv; + + voltage_uv = regulator_get_voltage(st->reg); + if (voltage_uv < 0) + return voltage_uv; + scale_pv = (unsigned long long)voltage_uv * 1000000; + } + if (unipolar) + scale_pv >>= chan->scan_type.realbits; + else + scale_pv >>= chan->scan_type.realbits - 1; + *val2 = do_div(scale_pv, 1000000000); + *val = scale_pv; + + return IIO_VAL_INT_PLUS_NANO; + } + + return -EINVAL; +} + +static const char * const ad7791_sample_freq_avail[] = { + [AD7791_FILTER_RATE_120] = "120", + [AD7791_FILTER_RATE_100] = "100", + [AD7791_FILTER_RATE_33_3] = "33.3", + [AD7791_FILTER_RATE_20] = "20", + [AD7791_FILTER_RATE_16_6] = "16.6", + [AD7791_FILTER_RATE_16_7] = "16.7", + [AD7791_FILTER_RATE_13_3] = "13.3", + [AD7791_FILTER_RATE_9_5] = "9.5", +}; + +static ssize_t ad7791_read_frequency(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad7791_state *st = iio_priv(indio_dev); + unsigned int rate = st->filter & AD7791_FILTER_RATE_MASK; + + return sprintf(buf, "%s\n", ad7791_sample_freq_avail[rate]); +} + +static ssize_t ad7791_write_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad7791_state *st = iio_priv(indio_dev); + int i, ret; + + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) { + mutex_unlock(&indio_dev->mlock); + return -EBUSY; + } + mutex_unlock(&indio_dev->mlock); + + ret = -EINVAL; + + for (i = 0; i < ARRAY_SIZE(ad7791_sample_freq_avail); i++) { + if (sysfs_streq(ad7791_sample_freq_avail[i], buf)) { + + mutex_lock(&indio_dev->mlock); + st->filter &= ~AD7791_FILTER_RATE_MASK; + st->filter |= i; + ad_sd_write_reg(&st->sd, AD7791_REG_FILTER, + sizeof(st->filter), st->filter); + mutex_unlock(&indio_dev->mlock); + ret = 0; + break; + } + } + + return ret ? ret : len; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + ad7791_read_frequency, + ad7791_write_frequency); + +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("120 100 33.3 20 16.7 16.6 13.3 9.5"); + +static struct attribute *ad7791_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group ad7791_attribute_group = { + .attrs = ad7791_attributes, +}; + +static const struct iio_info ad7791_info = { + .read_raw = &ad7791_read_raw, + .attrs = &ad7791_attribute_group, + .validate_trigger = ad_sd_validate_trigger, + .driver_module = THIS_MODULE, +}; + +static const struct iio_info ad7791_no_filter_info = { + .read_raw = &ad7791_read_raw, + .validate_trigger = ad_sd_validate_trigger, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad7791_setup(struct ad7791_state *st, + struct ad7791_platform_data *pdata) +{ + /* Set to poweron-reset default values */ + st->mode = AD7791_MODE_BUFFER; + st->filter = AD7791_FILTER_RATE_16_6; + + if (!pdata) + return 0; + + if ((st->info->flags & AD7791_FLAG_HAS_BUFFER) && !pdata->buffered) + st->mode &= ~AD7791_MODE_BUFFER; + + if ((st->info->flags & AD7791_FLAG_HAS_BURNOUT) && + pdata->burnout_current) + st->mode |= AD7791_MODE_BURNOUT; + + if ((st->info->flags & AD7791_FLAG_HAS_UNIPOLAR) && pdata->unipolar) + st->mode |= AD7791_MODE_UNIPOLAR; + + return ad_sd_write_reg(&st->sd, AD7791_REG_MODE, sizeof(st->mode), + st->mode); +} + +static int __devinit ad7791_probe(struct spi_device *spi) +{ + struct ad7791_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev; + struct ad7791_state *st; + int ret; + + if (!spi->irq) { + dev_err(&spi->dev, "Missing IRQ.\n"); + return -ENXIO; + } + + indio_dev = iio_device_alloc(sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + st->reg = regulator_get(&spi->dev, "refin"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto err_iio_free; + } + + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + st->info = &ad7791_chip_infos[spi_get_device_id(spi)->driver_data]; + ad_sd_init(&st->sd, indio_dev, spi, &ad7791_sigma_delta_info); + + spi_set_drvdata(spi, indio_dev); + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->info->channels; + indio_dev->num_channels = st->info->num_channels; + if (st->info->flags & AD7791_FLAG_HAS_FILTER) + indio_dev->info = &ad7791_info; + else + indio_dev->info = &ad7791_no_filter_info; + + ret = ad_sd_setup_buffer_and_trigger(indio_dev); + if (ret) + goto error_disable_reg; + + ret = ad7791_setup(st, pdata); + if (ret) + goto error_remove_trigger; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_remove_trigger; + + return 0; + +error_remove_trigger: + ad_sd_cleanup_buffer_and_trigger(indio_dev); +error_disable_reg: + regulator_disable(st->reg); +error_put_reg: + regulator_put(st->reg); +err_iio_free: + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad7791_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7791_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + ad_sd_cleanup_buffer_and_trigger(indio_dev); + + regulator_disable(st->reg); + regulator_put(st->reg); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7791_spi_ids[] = { + { "ad7787", AD7787 }, + { "ad7788", AD7788 }, + { "ad7789", AD7789 }, + { "ad7790", AD7790 }, + { "ad7791", AD7791 }, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7791_spi_ids); + +static struct spi_driver ad7791_driver = { + .driver = { + .name = "ad7791", + .owner = THIS_MODULE, + }, + .probe = ad7791_probe, + .remove = __devexit_p(ad7791_remove), + .id_table = ad7791_spi_ids, +}; +module_spi_driver(ad7791_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Device AD7787/AD7788/AD7789/AD7790/AD7791 ADC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c new file mode 100644 index 000000000000..67baa1363d7a --- /dev/null +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -0,0 +1,558 @@ +/* + * Support code for Analog Devices Sigma-Delta ADCs + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/err.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/adc/ad_sigma_delta.h> + +#include <asm/unaligned.h> + + +#define AD_SD_COMM_CHAN_MASK 0x3 + +#define AD_SD_REG_COMM 0x00 +#define AD_SD_REG_DATA 0x03 + +/** + * ad_sd_set_comm() - Set communications register + * + * @sigma_delta: The sigma delta device + * @comm: New value for the communications register + */ +void ad_sd_set_comm(struct ad_sigma_delta *sigma_delta, uint8_t comm) +{ + /* Some variants use the lower two bits of the communications register + * to select the channel */ + sigma_delta->comm = comm & AD_SD_COMM_CHAN_MASK; +} +EXPORT_SYMBOL_GPL(ad_sd_set_comm); + +/** + * ad_sd_write_reg() - Write a register + * + * @sigma_delta: The sigma delta device + * @reg: Address of the register + * @size: Size of the register (0-3) + * @val: Value to write to the register + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_write_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg, + unsigned int size, unsigned int val) +{ + uint8_t *data = sigma_delta->data; + struct spi_transfer t = { + .tx_buf = data, + .len = size + 1, + .cs_change = sigma_delta->bus_locked, + }; + struct spi_message m; + int ret; + + data[0] = (reg << sigma_delta->info->addr_shift) | sigma_delta->comm; + + switch (size) { + case 3: + data[1] = val >> 16; + data[2] = val >> 8; + data[3] = val; + break; + case 2: + put_unaligned_be16(val, &data[1]); + break; + case 1: + data[1] = val; + break; + case 0: + break; + default: + return -EINVAL; + } + + spi_message_init(&m); + spi_message_add_tail(&t, &m); + + if (sigma_delta->bus_locked) + ret = spi_sync_locked(sigma_delta->spi, &m); + else + ret = spi_sync(sigma_delta->spi, &m); + + return ret; +} +EXPORT_SYMBOL_GPL(ad_sd_write_reg); + +static int ad_sd_read_reg_raw(struct ad_sigma_delta *sigma_delta, + unsigned int reg, unsigned int size, uint8_t *val) +{ + uint8_t *data = sigma_delta->data; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = data, + .len = 1, + }, { + .rx_buf = val, + .len = size, + .cs_change = sigma_delta->bus_locked, + }, + }; + struct spi_message m; + + spi_message_init(&m); + + if (sigma_delta->info->has_registers) { + data[0] = reg << sigma_delta->info->addr_shift; + data[0] |= sigma_delta->info->read_mask; + spi_message_add_tail(&t[0], &m); + } + spi_message_add_tail(&t[1], &m); + + if (sigma_delta->bus_locked) + ret = spi_sync_locked(sigma_delta->spi, &m); + else + ret = spi_sync(sigma_delta->spi, &m); + + return ret; +} + +/** + * ad_sd_read_reg() - Read a register + * + * @sigma_delta: The sigma delta device + * @reg: Address of the register + * @size: Size of the register (1-4) + * @val: Read value + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_read_reg(struct ad_sigma_delta *sigma_delta, + unsigned int reg, unsigned int size, unsigned int *val) +{ + int ret; + + ret = ad_sd_read_reg_raw(sigma_delta, reg, size, sigma_delta->data); + if (ret < 0) + goto out; + + switch (size) { + case 4: + *val = get_unaligned_be32(sigma_delta->data); + break; + case 3: + *val = (sigma_delta->data[0] << 16) | + (sigma_delta->data[1] << 8) | + sigma_delta->data[2]; + break; + case 2: + *val = get_unaligned_be16(sigma_delta->data); + break; + case 1: + *val = sigma_delta->data[0]; + break; + default: + ret = -EINVAL; + break; + } + +out: + return ret; +} +EXPORT_SYMBOL_GPL(ad_sd_read_reg); + +static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, + unsigned int mode, unsigned int channel) +{ + int ret; + + ret = ad_sigma_delta_set_channel(sigma_delta, channel); + if (ret) + return ret; + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + INIT_COMPLETION(sigma_delta->completion); + + ret = ad_sigma_delta_set_mode(sigma_delta, mode); + if (ret < 0) + goto out; + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + ret = wait_for_completion_timeout(&sigma_delta->completion, 2*HZ); + if (ret == 0) { + sigma_delta->irq_dis = true; + disable_irq_nosync(sigma_delta->spi->irq); + ret = -EIO; + } else { + ret = 0; + } +out: + sigma_delta->bus_locked = false; + spi_bus_unlock(sigma_delta->spi->master); + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + + return ret; +} + +/** + * ad_sd_calibrate_all() - Performs channel calibration + * @sigma_delta: The sigma delta device + * @cb: Array of channels and calibration type to perform + * @n: Number of items in cb + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta, + const struct ad_sd_calib_data *cb, unsigned int n) +{ + unsigned int i; + int ret; + + for (i = 0; i < n; i++) { + ret = ad_sd_calibrate(sigma_delta, cb[i].mode, cb[i].channel); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_calibrate_all); + +/** + * ad_sigma_delta_single_conversion() - Performs a single data conversion + * @indio_dev: The IIO device + * @chan: The conversion is done for this channel + * @val: Pointer to the location where to store the read value + * + * Returns: 0 on success, an error value otherwise. + */ +int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int sample, raw_sample; + int ret = 0; + + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + + mutex_lock(&indio_dev->mlock); + ad_sigma_delta_set_channel(sigma_delta, chan->address); + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + INIT_COMPLETION(sigma_delta->completion); + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE); + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + ret = wait_for_completion_interruptible_timeout( + &sigma_delta->completion, HZ); + + sigma_delta->bus_locked = false; + spi_bus_unlock(sigma_delta->spi->master); + + if (ret == 0) + ret = -EIO; + if (ret < 0) + goto out; + + ret = ad_sd_read_reg(sigma_delta, AD_SD_REG_DATA, + DIV_ROUND_UP(chan->scan_type.realbits + chan->scan_type.shift, 8), + &raw_sample); + +out: + if (!sigma_delta->irq_dis) { + disable_irq_nosync(sigma_delta->spi->irq); + sigma_delta->irq_dis = true; + } + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + mutex_unlock(&indio_dev->mlock); + + if (ret) + return ret; + + sample = raw_sample >> chan->scan_type.shift; + sample &= (1 << chan->scan_type.realbits) - 1; + *val = sample; + + ret = ad_sigma_delta_postprocess_sample(sigma_delta, raw_sample); + if (ret) + return ret; + + return IIO_VAL_INT; +} +EXPORT_SYMBOL_GPL(ad_sigma_delta_single_conversion); + +static int ad_sd_buffer_postenable(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int channel; + int ret; + + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret < 0) + return ret; + + channel = find_first_bit(indio_dev->active_scan_mask, + indio_dev->masklength); + ret = ad_sigma_delta_set_channel(sigma_delta, + indio_dev->channels[channel].address); + if (ret) + goto err_predisable; + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + ret = ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_CONTINUOUS); + if (ret) + goto err_unlock; + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + + return 0; + +err_unlock: + spi_bus_unlock(sigma_delta->spi->master); +err_predisable: + + return ret; +} + +static int ad_sd_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + INIT_COMPLETION(sigma_delta->completion); + wait_for_completion_timeout(&sigma_delta->completion, HZ); + + if (!sigma_delta->irq_dis) { + disable_irq_nosync(sigma_delta->spi->irq); + sigma_delta->irq_dis = true; + } + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + + sigma_delta->bus_locked = false; + return spi_bus_unlock(sigma_delta->spi->master); +} + +static irqreturn_t ad_sd_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int reg_size; + uint8_t data[16]; + int ret; + + memset(data, 0x00, 16); + + /* Guaranteed to be aligned with 8 byte boundary */ + if (indio_dev->scan_timestamp) + ((s64 *)data)[1] = pf->timestamp; + + reg_size = indio_dev->channels[0].scan_type.realbits + + indio_dev->channels[0].scan_type.shift; + reg_size = DIV_ROUND_UP(reg_size, 8); + + switch (reg_size) { + case 4: + case 2: + case 1: + ret = ad_sd_read_reg_raw(sigma_delta, AD_SD_REG_DATA, + reg_size, &data[0]); + break; + case 3: + /* We store 24 bit samples in a 32 bit word. Keep the upper + * byte set to zero. */ + ret = ad_sd_read_reg_raw(sigma_delta, AD_SD_REG_DATA, + reg_size, &data[1]); + break; + } + + iio_push_to_buffer(indio_dev->buffer, (uint8_t *)data); + + iio_trigger_notify_done(indio_dev->trig); + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + + return IRQ_HANDLED; +} + +static const struct iio_buffer_setup_ops ad_sd_buffer_setup_ops = { + .preenable = &iio_sw_buffer_preenable, + .postenable = &ad_sd_buffer_postenable, + .predisable = &iio_triggered_buffer_predisable, + .postdisable = &ad_sd_buffer_postdisable, + .validate_scan_mask = &iio_validate_scan_mask_onehot, +}; + +static irqreturn_t ad_sd_data_rdy_trig_poll(int irq, void *private) +{ + struct ad_sigma_delta *sigma_delta = private; + + complete(&sigma_delta->completion); + disable_irq_nosync(irq); + sigma_delta->irq_dis = true; + iio_trigger_poll(sigma_delta->trig, iio_get_time_ns()); + + return IRQ_HANDLED; +} + +/** + * ad_sd_validate_trigger() - validate_trigger callback for ad_sigma_delta devices + * @indio_dev: The IIO device + * @trig: The new trigger + * + * Returns: 0 if the 'trig' matches the trigger registered by the ad_sigma_delta + * device, -EINVAL otherwise. + */ +int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + if (sigma_delta->trig != trig) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_validate_trigger); + +static const struct iio_trigger_ops ad_sd_trigger_ops = { + .owner = THIS_MODULE, +}; + +static int ad_sd_probe_trigger(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + int ret; + + sigma_delta->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, + indio_dev->id); + if (sigma_delta->trig == NULL) { + ret = -ENOMEM; + goto error_ret; + } + sigma_delta->trig->ops = &ad_sd_trigger_ops; + init_completion(&sigma_delta->completion); + + ret = request_irq(sigma_delta->spi->irq, + ad_sd_data_rdy_trig_poll, + IRQF_TRIGGER_LOW, + indio_dev->name, + sigma_delta); + if (ret) + goto error_free_trig; + + if (!sigma_delta->irq_dis) { + sigma_delta->irq_dis = true; + disable_irq_nosync(sigma_delta->spi->irq); + } + sigma_delta->trig->dev.parent = &sigma_delta->spi->dev; + sigma_delta->trig->private_data = sigma_delta; + + ret = iio_trigger_register(sigma_delta->trig); + if (ret) + goto error_free_irq; + + /* select default trigger */ + indio_dev->trig = sigma_delta->trig; + + return 0; + +error_free_irq: + free_irq(sigma_delta->spi->irq, sigma_delta); +error_free_trig: + iio_trigger_free(sigma_delta->trig); +error_ret: + return ret; +} + +static void ad_sd_remove_trigger(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + iio_trigger_unregister(sigma_delta->trig); + free_irq(sigma_delta->spi->irq, sigma_delta); + iio_trigger_free(sigma_delta->trig); +} + +/** + * ad_sd_setup_buffer_and_trigger() - + * @indio_dev: The IIO device + */ +int ad_sd_setup_buffer_and_trigger(struct iio_dev *indio_dev) +{ + int ret; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &ad_sd_trigger_handler, &ad_sd_buffer_setup_ops); + if (ret) + return ret; + + ret = ad_sd_probe_trigger(indio_dev); + if (ret) { + iio_triggered_buffer_cleanup(indio_dev); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_setup_buffer_and_trigger); + +/** + * ad_sd_cleanup_buffer_and_trigger() - + * @indio_dev: The IIO device + */ +void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev) +{ + ad_sd_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); +} +EXPORT_SYMBOL_GPL(ad_sd_cleanup_buffer_and_trigger); + +/** + * ad_sd_init() - Initializes a ad_sigma_delta struct + * @sigma_delta: The ad_sigma_delta device + * @indio_dev: The IIO device which the Sigma Delta device is used for + * @spi: The SPI device for the ad_sigma_delta device + * @info: Device specific callbacks and options + * + * This function needs to be called before any other operations are performed on + * the ad_sigma_delta struct. + */ +int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, + struct spi_device *spi, const struct ad_sigma_delta_info *info) +{ + sigma_delta->spi = spi; + sigma_delta->info = info; + iio_device_set_drvdata(indio_dev, sigma_delta); + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_init); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices Sigma-Delta ADCs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 3bd5540238a7..3ed94bf80596 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -82,7 +82,7 @@ static irqreturn_t at91_adc_trigger_handler(int irq, void *p) *timestamp = pf->timestamp; } - buffer->access->store_to(buffer, (u8 *)st->buffer, pf->timestamp); + buffer->access->store_to(buffer, (u8 *)st->buffer); iio_trigger_notify_done(idev->trig); st->irq_enabled = true; @@ -545,13 +545,6 @@ static int __devinit at91_adc_probe(struct platform_device *pdev) goto error_free_device; } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "No resource defined\n"); - ret = -ENXIO; - goto error_ret; - } - platform_set_drvdata(pdev, idev); idev->dev.parent = &pdev->dev; @@ -566,18 +559,12 @@ static int __devinit at91_adc_probe(struct platform_device *pdev) goto error_free_device; } - if (!request_mem_region(res->start, resource_size(res), - "AT91 adc registers")) { - dev_err(&pdev->dev, "Resources are unavailable.\n"); - ret = -EBUSY; - goto error_free_device; - } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - st->reg_base = ioremap(res->start, resource_size(res)); + st->reg_base = devm_request_and_ioremap(&pdev->dev, res); if (!st->reg_base) { - dev_err(&pdev->dev, "Failed to map registers.\n"); ret = -ENOMEM; - goto error_release_mem; + goto error_free_device; } /* @@ -592,45 +579,35 @@ static int __devinit at91_adc_probe(struct platform_device *pdev) idev); if (ret) { dev_err(&pdev->dev, "Failed to allocate IRQ.\n"); - goto error_unmap_reg; + goto error_free_device; } - st->clk = clk_get(&pdev->dev, "adc_clk"); + st->clk = devm_clk_get(&pdev->dev, "adc_clk"); if (IS_ERR(st->clk)) { dev_err(&pdev->dev, "Failed to get the clock.\n"); ret = PTR_ERR(st->clk); goto error_free_irq; } - ret = clk_prepare(st->clk); + ret = clk_prepare_enable(st->clk); if (ret) { - dev_err(&pdev->dev, "Could not prepare the clock.\n"); - goto error_free_clk; - } - - ret = clk_enable(st->clk); - if (ret) { - dev_err(&pdev->dev, "Could not enable the clock.\n"); - goto error_unprepare_clk; + dev_err(&pdev->dev, + "Could not prepare or enable the clock.\n"); + goto error_free_irq; } - st->adc_clk = clk_get(&pdev->dev, "adc_op_clk"); + st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk"); if (IS_ERR(st->adc_clk)) { dev_err(&pdev->dev, "Failed to get the ADC clock.\n"); ret = PTR_ERR(st->adc_clk); goto error_disable_clk; } - ret = clk_prepare(st->adc_clk); + ret = clk_prepare_enable(st->adc_clk); if (ret) { - dev_err(&pdev->dev, "Could not prepare the ADC clock.\n"); - goto error_free_adc_clk; - } - - ret = clk_enable(st->adc_clk); - if (ret) { - dev_err(&pdev->dev, "Could not enable the ADC clock.\n"); - goto error_unprepare_adc_clk; + dev_err(&pdev->dev, + "Could not prepare or enable the ADC clock.\n"); + goto error_disable_clk; } /* @@ -694,23 +671,11 @@ error_remove_triggers: error_unregister_buffer: at91_adc_buffer_remove(idev); error_disable_adc_clk: - clk_disable(st->adc_clk); -error_unprepare_adc_clk: - clk_unprepare(st->adc_clk); -error_free_adc_clk: - clk_put(st->adc_clk); + clk_disable_unprepare(st->adc_clk); error_disable_clk: - clk_disable(st->clk); -error_unprepare_clk: - clk_unprepare(st->clk); -error_free_clk: - clk_put(st->clk); + clk_disable_unprepare(st->clk); error_free_irq: free_irq(st->irq, idev); -error_unmap_reg: - iounmap(st->reg_base); -error_release_mem: - release_mem_region(res->start, resource_size(res)); error_free_device: iio_device_free(idev); error_ret: @@ -720,20 +685,14 @@ error_ret: static int __devexit at91_adc_remove(struct platform_device *pdev) { struct iio_dev *idev = platform_get_drvdata(pdev); - struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); struct at91_adc_state *st = iio_priv(idev); iio_device_unregister(idev); at91_adc_trigger_remove(idev); at91_adc_buffer_remove(idev); clk_disable_unprepare(st->adc_clk); - clk_put(st->adc_clk); - clk_disable(st->clk); - clk_unprepare(st->clk); - clk_put(st->clk); + clk_disable_unprepare(st->clk); free_irq(st->irq, idev); - iounmap(st->reg_base); - release_mem_region(res->start, resource_size(res)); iio_device_free(idev); return 0; diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c new file mode 100644 index 000000000000..a93aaf0bb841 --- /dev/null +++ b/drivers/iio/adc/lp8788_adc.c @@ -0,0 +1,264 @@ +/* + * TI LP8788 MFD - ADC driver + * + * Copyright 2012 Texas Instruments + * + * Author: Milo(Woogyom) Kim <milo.kim@ti.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. + */ + +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/driver.h> +#include <linux/iio/machine.h> +#include <linux/mfd/lp8788.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +/* register address */ +#define LP8788_ADC_CONF 0x60 +#define LP8788_ADC_RAW 0x61 +#define LP8788_ADC_DONE 0x63 + +#define ADC_CONV_START 1 + +struct lp8788_adc { + struct lp8788 *lp; + struct iio_map *map; + struct mutex lock; +}; + +static const int lp8788_scale[LPADC_MAX] = { + [LPADC_VBATT_5P5] = 1343101, + [LPADC_VIN_CHG] = 3052503, + [LPADC_IBATT] = 610500, + [LPADC_IC_TEMP] = 61050, + [LPADC_VBATT_6P0] = 1465201, + [LPADC_VBATT_5P0] = 1221001, + [LPADC_ADC1] = 610500, + [LPADC_ADC2] = 610500, + [LPADC_VDD] = 1025641, + [LPADC_VCOIN] = 757020, + [LPADC_ADC3] = 610500, + [LPADC_ADC4] = 610500, +}; + +static int lp8788_get_adc_result(struct lp8788_adc *adc, enum lp8788_adc_id id, + int *val) +{ + unsigned int msb; + unsigned int lsb; + unsigned int result; + u8 data; + u8 rawdata[2]; + int size = ARRAY_SIZE(rawdata); + int retry = 5; + int ret; + + data = (id << 1) | ADC_CONV_START; + ret = lp8788_write_byte(adc->lp, LP8788_ADC_CONF, data); + if (ret) + goto err_io; + + /* retry until adc conversion is done */ + data = 0; + while (retry--) { + usleep_range(100, 200); + + ret = lp8788_read_byte(adc->lp, LP8788_ADC_DONE, &data); + if (ret) + goto err_io; + + /* conversion done */ + if (data) + break; + } + + ret = lp8788_read_multi_bytes(adc->lp, LP8788_ADC_RAW, rawdata, size); + if (ret) + goto err_io; + + msb = (rawdata[0] << 4) & 0x00000ff0; + lsb = (rawdata[1] >> 4) & 0x0000000f; + result = msb | lsb; + *val = result; + + return 0; + +err_io: + return ret; +} + +static int lp8788_adc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct lp8788_adc *adc = iio_priv(indio_dev); + enum lp8788_adc_id id = chan->channel; + int ret; + + mutex_lock(&adc->lock); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = lp8788_get_adc_result(adc, id, val) ? -EIO : IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = lp8788_scale[id] / 1000000; + *val2 = lp8788_scale[id] % 1000000; + ret = IIO_VAL_INT_PLUS_MICRO; + break; + default: + ret = -EINVAL; + break; + } + + mutex_unlock(&adc->lock); + + return ret; +} + +static const struct iio_info lp8788_adc_info = { + .read_raw = &lp8788_adc_read_raw, + .driver_module = THIS_MODULE, +}; + +#define LP8788_CHAN(_id, _type) { \ + .type = _type, \ + .indexed = 1, \ + .channel = LPADC_##_id, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .datasheet_name = #_id, \ +} + +static const struct iio_chan_spec lp8788_adc_channels[] = { + [LPADC_VBATT_5P5] = LP8788_CHAN(VBATT_5P5, IIO_VOLTAGE), + [LPADC_VIN_CHG] = LP8788_CHAN(VIN_CHG, IIO_VOLTAGE), + [LPADC_IBATT] = LP8788_CHAN(IBATT, IIO_CURRENT), + [LPADC_IC_TEMP] = LP8788_CHAN(IC_TEMP, IIO_TEMP), + [LPADC_VBATT_6P0] = LP8788_CHAN(VBATT_6P0, IIO_VOLTAGE), + [LPADC_VBATT_5P0] = LP8788_CHAN(VBATT_5P0, IIO_VOLTAGE), + [LPADC_ADC1] = LP8788_CHAN(ADC1, IIO_VOLTAGE), + [LPADC_ADC2] = LP8788_CHAN(ADC2, IIO_VOLTAGE), + [LPADC_VDD] = LP8788_CHAN(VDD, IIO_VOLTAGE), + [LPADC_VCOIN] = LP8788_CHAN(VCOIN, IIO_VOLTAGE), + [LPADC_ADC3] = LP8788_CHAN(ADC3, IIO_VOLTAGE), + [LPADC_ADC4] = LP8788_CHAN(ADC4, IIO_VOLTAGE), +}; + +/* default maps used by iio consumer (lp8788-charger driver) */ +static struct iio_map lp8788_default_iio_maps[] = { + { + .consumer_dev_name = "lp8788-charger", + .consumer_channel = "lp8788_vbatt_5p0", + .adc_channel_label = "VBATT_5P0", + }, + { + .consumer_dev_name = "lp8788-charger", + .consumer_channel = "lp8788_adc1", + .adc_channel_label = "ADC1", + }, + { } +}; + +static int lp8788_iio_map_register(struct iio_dev *indio_dev, + struct lp8788_platform_data *pdata, + struct lp8788_adc *adc) +{ + struct iio_map *map; + int ret; + + map = (!pdata || !pdata->adc_pdata) ? + lp8788_default_iio_maps : pdata->adc_pdata; + + ret = iio_map_array_register(indio_dev, map); + if (ret) { + dev_err(adc->lp->dev, "iio map err: %d\n", ret); + return ret; + } + + adc->map = map; + return 0; +} + +static inline void lp8788_iio_map_unregister(struct iio_dev *indio_dev, + struct lp8788_adc *adc) +{ + iio_map_array_unregister(indio_dev, adc->map); +} + +static int __devinit lp8788_adc_probe(struct platform_device *pdev) +{ + struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); + struct iio_dev *indio_dev; + struct lp8788_adc *adc; + int ret; + + indio_dev = iio_device_alloc(sizeof(*adc)); + if (!indio_dev) + return -ENOMEM; + + adc = iio_priv(indio_dev); + adc->lp = lp; + platform_set_drvdata(pdev, indio_dev); + + ret = lp8788_iio_map_register(indio_dev, lp->pdata, adc); + if (ret) + goto err_iio_map; + + mutex_init(&adc->lock); + + indio_dev->dev.parent = lp->dev; + indio_dev->name = pdev->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &lp8788_adc_info; + indio_dev->channels = lp8788_adc_channels; + indio_dev->num_channels = ARRAY_SIZE(lp8788_adc_channels); + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(lp->dev, "iio dev register err: %d\n", ret); + goto err_iio_device; + } + + return 0; + +err_iio_device: + lp8788_iio_map_unregister(indio_dev, adc); +err_iio_map: + iio_device_free(indio_dev); + return ret; +} + +static int __devexit lp8788_adc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct lp8788_adc *adc = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + lp8788_iio_map_unregister(indio_dev, adc); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver lp8788_adc_driver = { + .probe = lp8788_adc_probe, + .remove = __devexit_p(lp8788_adc_remove), + .driver = { + .name = LP8788_DEV_ADC, + .owner = THIS_MODULE, + }, +}; +module_platform_driver(lp8788_adc_driver); + +MODULE_DESCRIPTION("Texas Instruments LP8788 ADC Driver"); +MODULE_AUTHOR("Milo Kim"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lp8788-adc"); diff --git a/drivers/iio/common/Kconfig b/drivers/iio/common/Kconfig new file mode 100644 index 000000000000..ed45ee54500c --- /dev/null +++ b/drivers/iio/common/Kconfig @@ -0,0 +1,5 @@ +# +# IIO common modules +# + +source "drivers/iio/common/hid-sensors/Kconfig" diff --git a/drivers/iio/common/Makefile b/drivers/iio/common/Makefile new file mode 100644 index 000000000000..81584009b21b --- /dev/null +++ b/drivers/iio/common/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for the IIO common modules. +# Common modules contains modules, which can be shared among multiple +# IIO modules. For example if the trigger processing is common for +# multiple IIO modules then this can be moved to a common module +# instead of duplicating in each module. +# + +obj-y += hid-sensors/ diff --git a/drivers/iio/common/hid-sensors/Kconfig b/drivers/iio/common/hid-sensors/Kconfig new file mode 100644 index 000000000000..8e63d81d652a --- /dev/null +++ b/drivers/iio/common/hid-sensors/Kconfig @@ -0,0 +1,26 @@ +# +# Hid Sensor common modules +# +menu "Hid Sensor IIO Common" + +config HID_SENSOR_IIO_COMMON + tristate "Common modules for all HID Sensor IIO drivers" + depends on HID_SENSOR_HUB + select IIO_TRIGGER if IIO_BUFFER + help + Say yes here to build support for HID sensor to use + HID sensor common processing for attributes and IIO triggers. + There are many attributes which can be shared among multiple + HID sensor drivers, this module contains processing for those + attributes. + +config HID_SENSOR_ENUM_BASE_QUIRKS + tristate "ENUM base quirks for HID Sensor IIO drivers" + depends on HID_SENSOR_IIO_COMMON + help + Say yes here to build support for sensor hub FW using + enumeration, which is using 1 as base instead of 0. + Since logical minimum is still set 0 instead of 1, + there is no easy way to differentiate. + +endmenu diff --git a/drivers/iio/common/hid-sensors/Makefile b/drivers/iio/common/hid-sensors/Makefile new file mode 100644 index 000000000000..1f463e00c242 --- /dev/null +++ b/drivers/iio/common/hid-sensors/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for the Hid sensor common modules. +# + +obj-$(CONFIG_HID_SENSOR_IIO_COMMON) += hid-sensor-iio-common.o +hid-sensor-iio-common-y := hid-sensor-attributes.o hid-sensor-trigger.o diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c new file mode 100644 index 000000000000..75374955caba --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -0,0 +1,250 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include "hid-sensor-attributes.h" + +static int pow_10(unsigned power) +{ + int i; + int ret = 1; + for (i = 0; i < power; ++i) + ret = ret * 10; + + return ret; +} + +static void simple_div(int dividend, int divisor, int *whole, + int *micro_frac) +{ + int rem; + int exp = 0; + + *micro_frac = 0; + if (divisor == 0) { + *whole = 0; + return; + } + *whole = dividend/divisor; + rem = dividend % divisor; + if (rem) { + while (rem <= divisor) { + rem *= 10; + exp++; + } + *micro_frac = (rem / divisor) * pow_10(6-exp); + } +} + +static void split_micro_fraction(unsigned int no, int exp, int *val1, int *val2) +{ + *val1 = no/pow_10(exp); + *val2 = no%pow_10(exp) * pow_10(6-exp); +} + +/* +VTF format uses exponent and variable size format. +For example if the size is 2 bytes +0x0067 with VTF16E14 format -> +1.03 +To convert just change to 0x67 to decimal and use two decimal as E14 stands +for 10^-2. +Negative numbers are 2's complement +*/ +static void convert_from_vtf_format(u32 value, int size, int exp, + int *val1, int *val2) +{ + int sign = 1; + + if (value & BIT(size*8 - 1)) { + value = ((1LL << (size * 8)) - value); + sign = -1; + } + exp = hid_sensor_convert_exponent(exp); + if (exp >= 0) { + *val1 = sign * value * pow_10(exp); + *val2 = 0; + } else { + split_micro_fraction(value, -exp, val1, val2); + if (*val1) + *val1 = sign * (*val1); + else + *val2 = sign * (*val2); + } +} + +static u32 convert_to_vtf_format(int size, int exp, int val1, int val2) +{ + u32 value; + int sign = 1; + + if (val1 < 0 || val2 < 0) + sign = -1; + exp = hid_sensor_convert_exponent(exp); + if (exp < 0) { + value = abs(val1) * pow_10(-exp); + value += abs(val2) / pow_10(6+exp); + } else + value = abs(val1) / pow_10(exp); + if (sign < 0) + value = ((1LL << (size * 8)) - value); + + return value; +} + +int hid_sensor_read_samp_freq_value(struct hid_sensor_iio_common *st, + int *val1, int *val2) +{ + s32 value; + int ret; + + ret = sensor_hub_get_feature(st->hsdev, + st->poll.report_id, + st->poll.index, &value); + if (ret < 0 || value < 0) { + *val1 = *val2 = 0; + return -EINVAL; + } else { + if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND) + simple_div(1000, value, val1, val2); + else if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND) + simple_div(1, value, val1, val2); + else { + *val1 = *val2 = 0; + return -EINVAL; + } + } + + return IIO_VAL_INT_PLUS_MICRO; +} +EXPORT_SYMBOL(hid_sensor_read_samp_freq_value); + +int hid_sensor_write_samp_freq_value(struct hid_sensor_iio_common *st, + int val1, int val2) +{ + s32 value; + int ret; + + if (val1 < 0 || val2 < 0) + ret = -EINVAL; + + value = val1 * pow_10(6) + val2; + if (value) { + if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND) + value = pow_10(9)/value; + else if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND) + value = pow_10(6)/value; + else + value = 0; + } + ret = sensor_hub_set_feature(st->hsdev, + st->poll.report_id, + st->poll.index, value); + if (ret < 0 || value < 0) + ret = -EINVAL; + + return ret; +} +EXPORT_SYMBOL(hid_sensor_write_samp_freq_value); + +int hid_sensor_read_raw_hyst_value(struct hid_sensor_iio_common *st, + int *val1, int *val2) +{ + s32 value; + int ret; + + ret = sensor_hub_get_feature(st->hsdev, + st->sensitivity.report_id, + st->sensitivity.index, &value); + if (ret < 0 || value < 0) { + *val1 = *val2 = 0; + return -EINVAL; + } else { + convert_from_vtf_format(value, st->sensitivity.size, + st->sensitivity.unit_expo, + val1, val2); + } + + return IIO_VAL_INT_PLUS_MICRO; +} +EXPORT_SYMBOL(hid_sensor_read_raw_hyst_value); + +int hid_sensor_write_raw_hyst_value(struct hid_sensor_iio_common *st, + int val1, int val2) +{ + s32 value; + int ret; + + value = convert_to_vtf_format(st->sensitivity.size, + st->sensitivity.unit_expo, + val1, val2); + ret = sensor_hub_set_feature(st->hsdev, + st->sensitivity.report_id, + st->sensitivity.index, value); + if (ret < 0 || value < 0) + ret = -EINVAL; + + return ret; +} +EXPORT_SYMBOL(hid_sensor_write_raw_hyst_value); + +int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_iio_common *st) +{ + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_REPORT_INTERVAL, + &st->poll); + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_REPORT_STATE, + &st->report_state); + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROY_POWER_STATE, + &st->power_state); + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS, + &st->sensitivity); + + hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x\n", + st->poll.index, st->poll.report_id, + st->report_state.index, st->report_state.report_id, + st->power_state.index, st->power_state.report_id, + st->sensitivity.index, st->sensitivity.report_id); + + return 0; +} +EXPORT_SYMBOL(hid_sensor_parse_common_attributes); + +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_DESCRIPTION("HID Sensor common attribute processing"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.h b/drivers/iio/common/hid-sensors/hid-sensor-attributes.h new file mode 100644 index 000000000000..a4676a0c3de5 --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.h @@ -0,0 +1,57 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#ifndef _HID_SENSORS_ATTRIBUTES_H +#define _HID_SENSORS_ATTRIBUTES_H + +/* Common hid sensor iio structure */ +struct hid_sensor_iio_common { + struct hid_sensor_hub_device *hsdev; + struct platform_device *pdev; + unsigned usage_id; + bool data_ready; + struct hid_sensor_hub_attribute_info poll; + struct hid_sensor_hub_attribute_info report_state; + struct hid_sensor_hub_attribute_info power_state; + struct hid_sensor_hub_attribute_info sensitivity; +}; + +/*Convert from hid unit expo to regular exponent*/ +static inline int hid_sensor_convert_exponent(int unit_expo) +{ + if (unit_expo < 0x08) + return unit_expo; + else if (unit_expo <= 0x0f) + return -(0x0f-unit_expo+1); + else + return 0; +} + +int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_iio_common *st); +int hid_sensor_write_raw_hyst_value(struct hid_sensor_iio_common *st, + int val1, int val2); +int hid_sensor_read_raw_hyst_value(struct hid_sensor_iio_common *st, + int *val1, int *val2); +int hid_sensor_write_samp_freq_value(struct hid_sensor_iio_common *st, + int val1, int val2); +int hid_sensor_read_samp_freq_value(struct hid_sensor_iio_common *st, + int *val1, int *val2); + +#endif diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c new file mode 100644 index 000000000000..d4b790d18efb --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -0,0 +1,103 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.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-attributes.h" +#include "hid-sensor-trigger.h" + +static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct hid_sensor_iio_common *st = trig->private_data; + int state_val; + + state_val = state ? 1 : 0; +#if (defined CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS) || \ + (defined CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS_MODULE) + ++state_val; +#endif + st->data_ready = state; + sensor_hub_set_feature(st->hsdev, st->power_state.report_id, + st->power_state.index, + (s32)state_val); + + sensor_hub_set_feature(st->hsdev, st->report_state.report_id, + st->report_state.index, + (s32)state_val); + + return 0; +} + +void hid_sensor_remove_trigger(struct iio_dev *indio_dev) +{ + iio_trigger_unregister(indio_dev->trig); + iio_trigger_free(indio_dev->trig); + indio_dev->trig = NULL; +} +EXPORT_SYMBOL(hid_sensor_remove_trigger); + +static const struct iio_trigger_ops hid_sensor_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state, +}; + +int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, + struct hid_sensor_iio_common *attrb) +{ + int ret; + struct iio_trigger *trig; + + trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id); + if (trig == NULL) { + dev_err(&indio_dev->dev, "Trigger Allocate Failed\n"); + ret = -ENOMEM; + goto error_ret; + } + + trig->dev.parent = indio_dev->dev.parent; + trig->private_data = attrb; + trig->ops = &hid_sensor_trigger_ops; + ret = iio_trigger_register(trig); + + if (ret) { + dev_err(&indio_dev->dev, "Trigger Register Failed\n"); + goto error_free_trig; + } + indio_dev->trig = trig; + + return ret; + +error_free_trig: + iio_trigger_free(trig); +error_ret: + return ret; +} +EXPORT_SYMBOL(hid_sensor_setup_trigger); + +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 new file mode 100644 index 000000000000..fd982971b1b8 --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h @@ -0,0 +1,26 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#ifndef _HID_SENSOR_TRIGGER_H +#define _HID_SENSOR_TRIGGER_H + +int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, + struct hid_sensor_iio_common *attrb); +void hid_sensor_remove_trigger(struct iio_dev *indio_dev); + +#endif diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 1be15fa9d618..b1c0ee5294ca 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -57,11 +57,12 @@ config AD5624R_SPI config AD5446 tristate "Analog Devices AD5446 and similar single channel DACs driver" - depends on SPI + depends on (SPI_MASTER || I2C) help - Say yes here to build support for Analog Devices AD5444, AD5446, AD5450, - AD5451, AD5452, AD5453, AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601, - AD5611, AD5620, AD5621, AD5640, AD5660, AD5662 DACs. + Say yes here to build support for Analog Devices AD5300, AD5301, AD5310, + AD5311, AD5320, AD5321, AD5444, AD5446, AD5450, AD5451, AD5452, AD5453, + AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601, AD5602, AD5611, AD5612, + AD5620, AD5621, AD5622, AD5640, AD5660, AD5662 DACs. To compile this driver as a module, choose M here: the module will be called ad5446. @@ -76,6 +77,17 @@ config AD5504 To compile this driver as a module, choose M here: the module will be called ad5504. +config AD5755 + tristate "Analog Devices AD5755/AD5755-1/AD5757/AD5735/AD5737 DAC driver" + depends on SPI_MASTER + help + Say yes here to build support for Analog Devices AD5755, AD5755-1, + AD5757, AD5735, AD5737 quad channel Digital to + Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5755. + config AD5764 tristate "Analog Devices AD5764/64R/44/44R DAC driver" depends on SPI_MASTER diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 9ea3ceeefc07..c0d333b23ba3 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o obj-$(CONFIG_AD5064) += ad5064.o obj-$(CONFIG_AD5504) += ad5504.o obj-$(CONFIG_AD5446) += ad5446.o +obj-$(CONFIG_AD5755) += ad5755.o obj-$(CONFIG_AD5764) += ad5764.o obj-$(CONFIG_AD5791) += ad5791.o obj-$(CONFIG_AD5686) += ad5686.o diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c index 2ca5059ef89e..3310cbbd41e7 100644 --- a/drivers/iio/dac/ad5446.c +++ b/drivers/iio/dac/ad5446.c @@ -14,6 +14,7 @@ #include <linux/sysfs.h> #include <linux/list.h> #include <linux/spi/spi.h> +#include <linux/i2c.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/module.h> @@ -21,24 +22,40 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> -#include "ad5446.h" +#define MODE_PWRDWN_1k 0x1 +#define MODE_PWRDWN_100k 0x2 +#define MODE_PWRDWN_TRISTATE 0x3 -static int ad5446_write(struct ad5446_state *st, unsigned val) -{ - __be16 data = cpu_to_be16(val); - return spi_write(st->spi, &data, sizeof(data)); -} +/** + * struct ad5446_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + */ -static int ad5660_write(struct ad5446_state *st, unsigned val) -{ - uint8_t data[3]; +struct ad5446_state { + struct device *dev; + const struct ad5446_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned cached_val; + unsigned pwr_down_mode; + unsigned pwr_down; +}; - data[0] = (val >> 16) & 0xFF; - data[1] = (val >> 8) & 0xFF; - data[2] = val & 0xFF; +/** + * struct ad5446_chip_info - chip specific information + * @channel: channel spec for the DAC + * @int_vref_mv: AD5620/40/60: the internal reference voltage + * @write: chip specific helper function to write to the register + */ - return spi_write(st->spi, data, sizeof(data)); -} +struct ad5446_chip_info { + struct iio_chan_spec channel; + u16 int_vref_mv; + int (*write)(struct ad5446_state *st, unsigned val); +}; static const char * const ad5446_powerdown_modes[] = { "1kohm_to_gnd", "100kohm_to_gnd", "three_state" @@ -110,7 +127,7 @@ static ssize_t ad5446_write_dac_powerdown(struct iio_dev *indio_dev, return ret ? ret : len; } -static const struct iio_chan_spec_ext_info ad5064_ext_info_powerdown[] = { +static const struct iio_chan_spec_ext_info ad5446_ext_info_powerdown[] = { { .name = "powerdown", .read = ad5446_read_dac_powerdown, @@ -136,84 +153,7 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info_powerdown[] = { _AD5446_CHANNEL(bits, storage, shift, NULL) #define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \ - _AD5446_CHANNEL(bits, storage, shift, ad5064_ext_info_powerdown) - -static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { - [ID_AD5444] = { - .channel = AD5446_CHANNEL(12, 16, 2), - .write = ad5446_write, - }, - [ID_AD5446] = { - .channel = AD5446_CHANNEL(14, 16, 0), - .write = ad5446_write, - }, - [ID_AD5450] = { - .channel = AD5446_CHANNEL(8, 16, 6), - .write = ad5446_write, - }, - [ID_AD5451] = { - .channel = AD5446_CHANNEL(10, 16, 4), - .write = ad5446_write, - }, - [ID_AD5541A] = { - .channel = AD5446_CHANNEL(16, 16, 0), - .write = ad5446_write, - }, - [ID_AD5512A] = { - .channel = AD5446_CHANNEL(12, 16, 4), - .write = ad5446_write, - }, - [ID_AD5553] = { - .channel = AD5446_CHANNEL(14, 16, 0), - .write = ad5446_write, - }, - [ID_AD5601] = { - .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6), - .write = ad5446_write, - }, - [ID_AD5611] = { - .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4), - .write = ad5446_write, - }, - [ID_AD5621] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .write = ad5446_write, - }, - [ID_AD5620_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .int_vref_mv = 2500, - .write = ad5446_write, - }, - [ID_AD5620_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .int_vref_mv = 1250, - .write = ad5446_write, - }, - [ID_AD5640_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), - .int_vref_mv = 2500, - .write = ad5446_write, - }, - [ID_AD5640_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), - .int_vref_mv = 1250, - .write = ad5446_write, - }, - [ID_AD5660_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .int_vref_mv = 2500, - .write = ad5660_write, - }, - [ID_AD5660_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .int_vref_mv = 1250, - .write = ad5660_write, - }, - [ID_AD5662] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .write = ad5660_write, - }, -}; + _AD5446_CHANNEL(bits, storage, shift, ad5446_ext_info_powerdown) static int ad5446_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, @@ -272,14 +212,15 @@ static const struct iio_info ad5446_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad5446_probe(struct spi_device *spi) +static int __devinit ad5446_probe(struct device *dev, const char *name, + const struct ad5446_chip_info *chip_info) { struct ad5446_state *st; struct iio_dev *indio_dev; struct regulator *reg; int ret, voltage_uv = 0; - reg = regulator_get(&spi->dev, "vcc"); + reg = regulator_get(dev, "vcc"); if (!IS_ERR(reg)) { ret = regulator_enable(reg); if (ret) @@ -294,16 +235,15 @@ static int __devinit ad5446_probe(struct spi_device *spi) goto error_disable_reg; } st = iio_priv(indio_dev); - st->chip_info = - &ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + st->chip_info = chip_info; - spi_set_drvdata(spi, indio_dev); + dev_set_drvdata(dev, indio_dev); st->reg = reg; - st->spi = spi; + st->dev = dev; - /* Establish that the iio_dev is a child of the spi device */ - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; + /* Establish that the iio_dev is a child of the device */ + indio_dev->dev.parent = dev; + indio_dev->name = name; indio_dev->info = &ad5446_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = &st->chip_info->channel; @@ -316,7 +256,7 @@ static int __devinit ad5446_probe(struct spi_device *spi) else if (voltage_uv) st->vref_mv = voltage_uv / 1000; else - dev_warn(&spi->dev, "reference voltage unspecified\n"); + dev_warn(dev, "reference voltage unspecified\n"); ret = iio_device_register(indio_dev); if (ret) @@ -336,9 +276,9 @@ error_put_reg: return ret; } -static int ad5446_remove(struct spi_device *spi) +static int ad5446_remove(struct device *dev) { - struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5446_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); @@ -351,7 +291,151 @@ static int ad5446_remove(struct spi_device *spi) return 0; } -static const struct spi_device_id ad5446_id[] = { +#if IS_ENABLED(CONFIG_SPI_MASTER) + +static int ad5446_write(struct ad5446_state *st, unsigned val) +{ + struct spi_device *spi = to_spi_device(st->dev); + __be16 data = cpu_to_be16(val); + + return spi_write(spi, &data, sizeof(data)); +} + +static int ad5660_write(struct ad5446_state *st, unsigned val) +{ + struct spi_device *spi = to_spi_device(st->dev); + uint8_t data[3]; + + data[0] = (val >> 16) & 0xFF; + data[1] = (val >> 8) & 0xFF; + data[2] = val & 0xFF; + + return spi_write(spi, data, sizeof(data)); +} + +/** + * ad5446_supported_spi_device_ids: + * The AD5620/40/60 parts are available in different fixed internal reference + * voltage options. The actual part numbers may look differently + * (and a bit cryptic), however this style is used to make clear which + * parts are supported here. + */ +enum ad5446_supported_spi_device_ids { + ID_AD5300, + ID_AD5310, + ID_AD5320, + ID_AD5444, + ID_AD5446, + ID_AD5450, + ID_AD5451, + ID_AD5541A, + ID_AD5512A, + ID_AD5553, + ID_AD5601, + ID_AD5611, + ID_AD5621, + ID_AD5620_2500, + ID_AD5620_1250, + ID_AD5640_2500, + ID_AD5640_1250, + ID_AD5660_2500, + ID_AD5660_1250, + ID_AD5662, +}; + +static const struct ad5446_chip_info ad5446_spi_chip_info[] = { + [ID_AD5300] = { + .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 4), + .write = ad5446_write, + }, + [ID_AD5310] = { + .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 2), + .write = ad5446_write, + }, + [ID_AD5320] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 0), + .write = ad5446_write, + }, + [ID_AD5444] = { + .channel = AD5446_CHANNEL(12, 16, 2), + .write = ad5446_write, + }, + [ID_AD5446] = { + .channel = AD5446_CHANNEL(14, 16, 0), + .write = ad5446_write, + }, + [ID_AD5450] = { + .channel = AD5446_CHANNEL(8, 16, 6), + .write = ad5446_write, + }, + [ID_AD5451] = { + .channel = AD5446_CHANNEL(10, 16, 4), + .write = ad5446_write, + }, + [ID_AD5541A] = { + .channel = AD5446_CHANNEL(16, 16, 0), + .write = ad5446_write, + }, + [ID_AD5512A] = { + .channel = AD5446_CHANNEL(12, 16, 4), + .write = ad5446_write, + }, + [ID_AD5553] = { + .channel = AD5446_CHANNEL(14, 16, 0), + .write = ad5446_write, + }, + [ID_AD5601] = { + .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6), + .write = ad5446_write, + }, + [ID_AD5611] = { + .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4), + .write = ad5446_write, + }, + [ID_AD5621] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .write = ad5446_write, + }, + [ID_AD5620_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .int_vref_mv = 2500, + .write = ad5446_write, + }, + [ID_AD5620_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .int_vref_mv = 1250, + .write = ad5446_write, + }, + [ID_AD5640_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), + .int_vref_mv = 2500, + .write = ad5446_write, + }, + [ID_AD5640_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), + .int_vref_mv = 1250, + .write = ad5446_write, + }, + [ID_AD5660_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .int_vref_mv = 2500, + .write = ad5660_write, + }, + [ID_AD5660_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .int_vref_mv = 1250, + .write = ad5660_write, + }, + [ID_AD5662] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .write = ad5660_write, + }, +}; + +static const struct spi_device_id ad5446_spi_ids[] = { + {"ad5300", ID_AD5300}, + {"ad5310", ID_AD5310}, + {"ad5320", ID_AD5320}, {"ad5444", ID_AD5444}, {"ad5446", ID_AD5446}, {"ad5450", ID_AD5450}, @@ -375,18 +459,160 @@ static const struct spi_device_id ad5446_id[] = { {"ad5662", ID_AD5662}, {} }; -MODULE_DEVICE_TABLE(spi, ad5446_id); +MODULE_DEVICE_TABLE(spi, ad5446_spi_ids); + +static int __devinit ad5446_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); -static struct spi_driver ad5446_driver = { + return ad5446_probe(&spi->dev, id->name, + &ad5446_spi_chip_info[id->driver_data]); +} + +static int __devexit ad5446_spi_remove(struct spi_device *spi) +{ + return ad5446_remove(&spi->dev); +} + +static struct spi_driver ad5446_spi_driver = { .driver = { .name = "ad5446", .owner = THIS_MODULE, }, - .probe = ad5446_probe, - .remove = __devexit_p(ad5446_remove), - .id_table = ad5446_id, + .probe = ad5446_spi_probe, + .remove = __devexit_p(ad5446_spi_remove), + .id_table = ad5446_spi_ids, }; -module_spi_driver(ad5446_driver); + +static int __init ad5446_spi_register_driver(void) +{ + return spi_register_driver(&ad5446_spi_driver); +} + +static void ad5446_spi_unregister_driver(void) +{ + spi_unregister_driver(&ad5446_spi_driver); +} + +#else + +static inline int ad5446_spi_register_driver(void) { return 0; } +static inline void ad5446_spi_unregister_driver(void) { } + +#endif + +#if IS_ENABLED(CONFIG_I2C) + +static int ad5622_write(struct ad5446_state *st, unsigned val) +{ + struct i2c_client *client = to_i2c_client(st->dev); + __be16 data = cpu_to_be16(val); + + return i2c_master_send(client, (char *)&data, sizeof(data)); +} + +/** + * ad5446_supported_i2c_device_ids: + * The AD5620/40/60 parts are available in different fixed internal reference + * voltage options. The actual part numbers may look differently + * (and a bit cryptic), however this style is used to make clear which + * parts are supported here. + */ +enum ad5446_supported_i2c_device_ids { + ID_AD5602, + ID_AD5612, + ID_AD5622, +}; + +static const struct ad5446_chip_info ad5446_i2c_chip_info[] = { + [ID_AD5602] = { + .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 4), + .write = ad5622_write, + }, + [ID_AD5612] = { + .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 2), + .write = ad5622_write, + }, + [ID_AD5622] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 0), + .write = ad5622_write, + }, +}; + +static int __devinit ad5446_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + return ad5446_probe(&i2c->dev, id->name, + &ad5446_i2c_chip_info[id->driver_data]); +} + +static int __devexit ad5446_i2c_remove(struct i2c_client *i2c) +{ + return ad5446_remove(&i2c->dev); +} + +static const struct i2c_device_id ad5446_i2c_ids[] = { + {"ad5301", ID_AD5602}, + {"ad5311", ID_AD5612}, + {"ad5321", ID_AD5622}, + {"ad5602", ID_AD5602}, + {"ad5612", ID_AD5612}, + {"ad5622", ID_AD5622}, + {} +}; +MODULE_DEVICE_TABLE(i2c, ad5446_i2c_ids); + +static struct i2c_driver ad5446_i2c_driver = { + .driver = { + .name = "ad5446", + .owner = THIS_MODULE, + }, + .probe = ad5446_i2c_probe, + .remove = __devexit_p(ad5446_i2c_remove), + .id_table = ad5446_i2c_ids, +}; + +static int __init ad5446_i2c_register_driver(void) +{ + return i2c_add_driver(&ad5446_i2c_driver); +} + +static void __exit ad5446_i2c_unregister_driver(void) +{ + i2c_del_driver(&ad5446_i2c_driver); +} + +#else + +static inline int ad5446_i2c_register_driver(void) { return 0; } +static inline void ad5446_i2c_unregister_driver(void) { } + +#endif + +static int __init ad5446_init(void) +{ + int ret; + + ret = ad5446_spi_register_driver(); + if (ret) + return ret; + + ret = ad5446_i2c_register_driver(); + if (ret) { + ad5446_spi_unregister_driver(); + return ret; + } + + return 0; +} +module_init(ad5446_init); + +static void __exit ad5446_exit(void) +{ + ad5446_i2c_unregister_driver(); + ad5446_spi_unregister_driver(); +} +module_exit(ad5446_exit); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC"); diff --git a/drivers/iio/dac/ad5446.h b/drivers/iio/dac/ad5446.h deleted file mode 100644 index 2934269a56d5..000000000000 --- a/drivers/iio/dac/ad5446.h +++ /dev/null @@ -1,91 +0,0 @@ -/* - * AD5446 SPI DAC driver - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ -#ifndef IIO_DAC_AD5446_H_ -#define IIO_DAC_AD5446_H_ - -/* DAC Control Bits */ - -#define AD5446_LOAD (0x0 << 14) /* Load and update */ -#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */ -#define AD5446_NOP (0x2 << 14) /* No operation */ -#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */ - -#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/ -#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */ -#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */ -#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */ - -#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/ -#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */ -#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */ -#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */ - -#define MODE_PWRDWN_1k 0x1 -#define MODE_PWRDWN_100k 0x2 -#define MODE_PWRDWN_TRISTATE 0x3 - -/** - * struct ad5446_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - */ - -struct ad5446_state { - struct spi_device *spi; - const struct ad5446_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned cached_val; - unsigned pwr_down_mode; - unsigned pwr_down; -}; - -/** - * struct ad5446_chip_info - chip specific information - * @channel: channel spec for the DAC - * @int_vref_mv: AD5620/40/60: the internal reference voltage - * @write: chip specific helper function to write to the register - */ - -struct ad5446_chip_info { - struct iio_chan_spec channel; - u16 int_vref_mv; - int (*write)(struct ad5446_state *st, unsigned val); -}; - -/** - * ad5446_supported_device_ids: - * The AD5620/40/60 parts are available in different fixed internal reference - * voltage options. The actual part numbers may look differently - * (and a bit cryptic), however this style is used to make clear which - * parts are supported here. - */ - -enum ad5446_supported_device_ids { - ID_AD5444, - ID_AD5446, - ID_AD5450, - ID_AD5451, - ID_AD5541A, - ID_AD5512A, - ID_AD5553, - ID_AD5601, - ID_AD5611, - ID_AD5621, - ID_AD5620_2500, - ID_AD5620_1250, - ID_AD5640_2500, - ID_AD5640_1250, - ID_AD5660_2500, - ID_AD5660_1250, - ID_AD5662, -}; - -#endif /* IIO_DAC_AD5446_H_ */ diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c new file mode 100644 index 000000000000..5db3506034c5 --- /dev/null +++ b/drivers/iio/dac/ad5755.c @@ -0,0 +1,650 @@ +/* + * AD5755, AD5755-1, AD5757, AD5735, AD5737 Digital to analog converters driver + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/platform_data/ad5755.h> + +#define AD5755_NUM_CHANNELS 4 + +#define AD5755_ADDR(x) ((x) << 16) + +#define AD5755_WRITE_REG_DATA(chan) (chan) +#define AD5755_WRITE_REG_GAIN(chan) (0x08 | (chan)) +#define AD5755_WRITE_REG_OFFSET(chan) (0x10 | (chan)) +#define AD5755_WRITE_REG_CTRL(chan) (0x1c | (chan)) + +#define AD5755_READ_REG_DATA(chan) (chan) +#define AD5755_READ_REG_CTRL(chan) (0x4 | (chan)) +#define AD5755_READ_REG_GAIN(chan) (0x8 | (chan)) +#define AD5755_READ_REG_OFFSET(chan) (0xc | (chan)) +#define AD5755_READ_REG_CLEAR(chan) (0x10 | (chan)) +#define AD5755_READ_REG_SLEW(chan) (0x14 | (chan)) +#define AD5755_READ_REG_STATUS 0x18 +#define AD5755_READ_REG_MAIN 0x19 +#define AD5755_READ_REG_DC_DC 0x1a + +#define AD5755_CTRL_REG_SLEW 0x0 +#define AD5755_CTRL_REG_MAIN 0x1 +#define AD5755_CTRL_REG_DAC 0x2 +#define AD5755_CTRL_REG_DC_DC 0x3 +#define AD5755_CTRL_REG_SW 0x4 + +#define AD5755_READ_FLAG 0x800000 + +#define AD5755_NOOP 0x1CE000 + +#define AD5755_DAC_INT_EN BIT(8) +#define AD5755_DAC_CLR_EN BIT(7) +#define AD5755_DAC_OUT_EN BIT(6) +#define AD5755_DAC_INT_CURRENT_SENSE_RESISTOR BIT(5) +#define AD5755_DAC_DC_DC_EN BIT(4) +#define AD5755_DAC_VOLTAGE_OVERRANGE_EN BIT(3) + +#define AD5755_DC_DC_MAXV 0 +#define AD5755_DC_DC_FREQ_SHIFT 2 +#define AD5755_DC_DC_PHASE_SHIFT 4 +#define AD5755_EXT_DC_DC_COMP_RES BIT(6) + +#define AD5755_SLEW_STEP_SIZE_SHIFT 0 +#define AD5755_SLEW_RATE_SHIFT 3 +#define AD5755_SLEW_ENABLE BIT(12) + +/** + * struct ad5755_chip_info - chip specific information + * @channel_template: channel specification + * @calib_shift: shift for the calibration data registers + * @has_voltage_out: whether the chip has voltage outputs + */ +struct ad5755_chip_info { + const struct iio_chan_spec channel_template; + unsigned int calib_shift; + bool has_voltage_out; +}; + +/** + * struct ad5755_state - driver instance specific data + * @spi: spi device the driver is attached to + * @chip_info: chip model specific constants, available modes etc + * @pwr_down: bitmask which contains hether a channel is powered down or not + * @ctrl: software shadow of the channel ctrl registers + * @channels: iio channel spec for the device + * @data: spi transfer buffers + */ +struct ad5755_state { + struct spi_device *spi; + const struct ad5755_chip_info *chip_info; + unsigned int pwr_down; + unsigned int ctrl[AD5755_NUM_CHANNELS]; + struct iio_chan_spec channels[AD5755_NUM_CHANNELS]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + + union { + u32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +enum ad5755_type { + ID_AD5755, + ID_AD5757, + ID_AD5735, + ID_AD5737, +}; + +static int ad5755_write_unlocked(struct iio_dev *indio_dev, + unsigned int reg, unsigned int val) +{ + struct ad5755_state *st = iio_priv(indio_dev); + + st->data[0].d32 = cpu_to_be32((reg << 16) | val); + + return spi_write(st->spi, &st->data[0].d8[1], 3); +} + +static int ad5755_write_ctrl_unlocked(struct iio_dev *indio_dev, + unsigned int channel, unsigned int reg, unsigned int val) +{ + return ad5755_write_unlocked(indio_dev, + AD5755_WRITE_REG_CTRL(channel), (reg << 13) | val); +} + +static int ad5755_write(struct iio_dev *indio_dev, unsigned int reg, + unsigned int val) +{ + int ret; + + mutex_lock(&indio_dev->mlock); + ret = ad5755_write_unlocked(indio_dev, reg, val); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5755_write_ctrl(struct iio_dev *indio_dev, unsigned int channel, + unsigned int reg, unsigned int val) +{ + int ret; + + mutex_lock(&indio_dev->mlock); + ret = ad5755_write_ctrl_unlocked(indio_dev, channel, reg, val); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5755_read(struct iio_dev *indio_dev, unsigned int addr) +{ + struct ad5755_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .tx_buf = &st->data[1].d8[1], + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32(AD5755_READ_FLAG | (addr << 16)); + st->data[1].d32 = cpu_to_be32(AD5755_NOOP); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + ret = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5755_update_dac_ctrl(struct iio_dev *indio_dev, + unsigned int channel, unsigned int set, unsigned int clr) +{ + struct ad5755_state *st = iio_priv(indio_dev); + int ret; + + st->ctrl[channel] |= set; + st->ctrl[channel] &= ~clr; + + ret = ad5755_write_ctrl_unlocked(indio_dev, channel, + AD5755_CTRL_REG_DAC, st->ctrl[channel]); + + return ret; +} + +static int ad5755_set_channel_pwr_down(struct iio_dev *indio_dev, + unsigned int channel, bool pwr_down) +{ + struct ad5755_state *st = iio_priv(indio_dev); + unsigned int mask = BIT(channel); + + mutex_lock(&indio_dev->mlock); + + if ((bool)(st->pwr_down & mask) == pwr_down) + goto out_unlock; + + if (!pwr_down) { + st->pwr_down &= ~mask; + ad5755_update_dac_ctrl(indio_dev, channel, + AD5755_DAC_INT_EN | AD5755_DAC_DC_DC_EN, 0); + udelay(200); + ad5755_update_dac_ctrl(indio_dev, channel, + AD5755_DAC_OUT_EN, 0); + } else { + st->pwr_down |= mask; + ad5755_update_dac_ctrl(indio_dev, channel, + 0, AD5755_DAC_INT_EN | AD5755_DAC_OUT_EN | + AD5755_DAC_DC_DC_EN); + } + +out_unlock: + mutex_unlock(&indio_dev->mlock); + + return 0; +} + +static const int ad5755_min_max_table[][2] = { + [AD5755_MODE_VOLTAGE_0V_5V] = { 0, 5000 }, + [AD5755_MODE_VOLTAGE_0V_10V] = { 0, 10000 }, + [AD5755_MODE_VOLTAGE_PLUSMINUS_5V] = { -5000, 5000 }, + [AD5755_MODE_VOLTAGE_PLUSMINUS_10V] = { -10000, 10000 }, + [AD5755_MODE_CURRENT_4mA_20mA] = { 4, 20 }, + [AD5755_MODE_CURRENT_0mA_20mA] = { 0, 20 }, + [AD5755_MODE_CURRENT_0mA_24mA] = { 0, 24 }, +}; + +static void ad5755_get_min_max(struct ad5755_state *st, + struct iio_chan_spec const *chan, int *min, int *max) +{ + enum ad5755_mode mode = st->ctrl[chan->channel] & 7; + *min = ad5755_min_max_table[mode][0]; + *max = ad5755_min_max_table[mode][1]; +} + +static inline int ad5755_get_offset(struct ad5755_state *st, + struct iio_chan_spec const *chan) +{ + int min, max; + + ad5755_get_min_max(st, chan, &min, &max); + return (min * (1 << chan->scan_type.realbits)) / (max - min); +} + +static inline int ad5755_get_scale(struct ad5755_state *st, + struct iio_chan_spec const *chan) +{ + int min, max; + + ad5755_get_min_max(st, chan, &min, &max); + return ((max - min) * 1000000000ULL) >> chan->scan_type.realbits; +} + +static int ad5755_chan_reg_info(struct ad5755_state *st, + struct iio_chan_spec const *chan, long info, bool write, + unsigned int *reg, unsigned int *shift, unsigned int *offset) +{ + switch (info) { + case IIO_CHAN_INFO_RAW: + if (write) + *reg = AD5755_WRITE_REG_DATA(chan->address); + else + *reg = AD5755_READ_REG_DATA(chan->address); + *shift = chan->scan_type.shift; + *offset = 0; + break; + case IIO_CHAN_INFO_CALIBBIAS: + if (write) + *reg = AD5755_WRITE_REG_OFFSET(chan->address); + else + *reg = AD5755_READ_REG_OFFSET(chan->address); + *shift = st->chip_info->calib_shift; + *offset = 32768; + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (write) + *reg = AD5755_WRITE_REG_GAIN(chan->address); + else + *reg = AD5755_READ_REG_GAIN(chan->address); + *shift = st->chip_info->calib_shift; + *offset = 0; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ad5755_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val, int *val2, long info) +{ + struct ad5755_state *st = iio_priv(indio_dev); + unsigned int reg, shift, offset; + int ret; + + switch (info) { + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = ad5755_get_scale(st, chan); + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + *val = ad5755_get_offset(st, chan); + return IIO_VAL_INT; + default: + ret = ad5755_chan_reg_info(st, chan, info, false, + ®, &shift, &offset); + if (ret) + return ret; + + ret = ad5755_read(indio_dev, reg); + if (ret < 0) + return ret; + + *val = (ret - offset) >> shift; + + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static int ad5755_write_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int val, int val2, long info) +{ + struct ad5755_state *st = iio_priv(indio_dev); + unsigned int shift, reg, offset; + int ret; + + ret = ad5755_chan_reg_info(st, chan, info, true, + ®, &shift, &offset); + if (ret) + return ret; + + val <<= shift; + val += offset; + + if (val < 0 || val > 0xffff) + return -EINVAL; + + return ad5755_write(indio_dev, reg, val); +} + +static ssize_t ad5755_read_powerdown(struct iio_dev *indio_dev, uintptr_t priv, + const struct iio_chan_spec *chan, char *buf) +{ + struct ad5755_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", + (bool)(st->pwr_down & (1 << chan->channel))); +} + +static ssize_t ad5755_write_powerdown(struct iio_dev *indio_dev, uintptr_t priv, + struct iio_chan_spec const *chan, const char *buf, size_t len) +{ + bool pwr_down; + int ret; + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + ret = ad5755_set_channel_pwr_down(indio_dev, chan->channel, pwr_down); + return ret ? ret : len; +} + +static const struct iio_info ad5755_info = { + .read_raw = ad5755_read_raw, + .write_raw = ad5755_write_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_chan_spec_ext_info ad5755_ext_info[] = { + { + .name = "powerdown", + .read = ad5755_read_powerdown, + .write = ad5755_write_powerdown, + }, + { }, +}; + +#define AD5755_CHANNEL(_bits) { \ + .indexed = 1, \ + .output = 1, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ + .ext_info = ad5755_ext_info, \ +} + +static const struct ad5755_chip_info ad5755_chip_info_tbl[] = { + [ID_AD5735] = { + .channel_template = AD5755_CHANNEL(14), + .has_voltage_out = true, + .calib_shift = 4, + }, + [ID_AD5737] = { + .channel_template = AD5755_CHANNEL(14), + .has_voltage_out = false, + .calib_shift = 4, + }, + [ID_AD5755] = { + .channel_template = AD5755_CHANNEL(16), + .has_voltage_out = true, + .calib_shift = 0, + }, + [ID_AD5757] = { + .channel_template = AD5755_CHANNEL(16), + .has_voltage_out = false, + .calib_shift = 0, + }, +}; + +static bool ad5755_is_valid_mode(struct ad5755_state *st, enum ad5755_mode mode) +{ + switch (mode) { + case AD5755_MODE_VOLTAGE_0V_5V: + case AD5755_MODE_VOLTAGE_0V_10V: + case AD5755_MODE_VOLTAGE_PLUSMINUS_5V: + case AD5755_MODE_VOLTAGE_PLUSMINUS_10V: + return st->chip_info->has_voltage_out; + case AD5755_MODE_CURRENT_4mA_20mA: + case AD5755_MODE_CURRENT_0mA_20mA: + case AD5755_MODE_CURRENT_0mA_24mA: + return true; + default: + return false; + } +} + +static int __devinit ad5755_setup_pdata(struct iio_dev *indio_dev, + const struct ad5755_platform_data *pdata) +{ + struct ad5755_state *st = iio_priv(indio_dev); + unsigned int val; + unsigned int i; + int ret; + + if (pdata->dc_dc_phase > AD5755_DC_DC_PHASE_90_DEGREE || + pdata->dc_dc_freq > AD5755_DC_DC_FREQ_650kHZ || + pdata->dc_dc_maxv > AD5755_DC_DC_MAXV_29V5) + return -EINVAL; + + val = pdata->dc_dc_maxv << AD5755_DC_DC_MAXV; + val |= pdata->dc_dc_freq << AD5755_DC_DC_FREQ_SHIFT; + val |= pdata->dc_dc_phase << AD5755_DC_DC_PHASE_SHIFT; + if (pdata->ext_dc_dc_compenstation_resistor) + val |= AD5755_EXT_DC_DC_COMP_RES; + + ret = ad5755_write_ctrl(indio_dev, 0, AD5755_CTRL_REG_DC_DC, val); + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(pdata->dac); ++i) { + val = pdata->dac[i].slew.step_size << + AD5755_SLEW_STEP_SIZE_SHIFT; + val |= pdata->dac[i].slew.rate << + AD5755_SLEW_RATE_SHIFT; + if (pdata->dac[i].slew.enable) + val |= AD5755_SLEW_ENABLE; + + ret = ad5755_write_ctrl(indio_dev, i, + AD5755_CTRL_REG_SLEW, val); + if (ret < 0) + return ret; + } + + for (i = 0; i < ARRAY_SIZE(pdata->dac); ++i) { + if (!ad5755_is_valid_mode(st, pdata->dac[i].mode)) + return -EINVAL; + + val = 0; + if (!pdata->dac[i].ext_current_sense_resistor) + val |= AD5755_DAC_INT_CURRENT_SENSE_RESISTOR; + if (pdata->dac[i].enable_voltage_overrange) + val |= AD5755_DAC_VOLTAGE_OVERRANGE_EN; + val |= pdata->dac[i].mode; + + ret = ad5755_update_dac_ctrl(indio_dev, i, val, 0); + if (ret < 0) + return ret; + } + + return 0; +} + +static bool __devinit ad5755_is_voltage_mode(enum ad5755_mode mode) +{ + switch (mode) { + case AD5755_MODE_VOLTAGE_0V_5V: + case AD5755_MODE_VOLTAGE_0V_10V: + case AD5755_MODE_VOLTAGE_PLUSMINUS_5V: + case AD5755_MODE_VOLTAGE_PLUSMINUS_10V: + return true; + default: + return false; + } +} + +static int __devinit ad5755_init_channels(struct iio_dev *indio_dev, + const struct ad5755_platform_data *pdata) +{ + struct ad5755_state *st = iio_priv(indio_dev); + struct iio_chan_spec *channels = st->channels; + unsigned int i; + + for (i = 0; i < AD5755_NUM_CHANNELS; ++i) { + channels[i] = st->chip_info->channel_template; + channels[i].channel = i; + channels[i].address = i; + if (pdata && ad5755_is_voltage_mode(pdata->dac[i].mode)) + channels[i].type = IIO_VOLTAGE; + else + channels[i].type = IIO_CURRENT; + } + + indio_dev->channels = channels; + + return 0; +} + +#define AD5755_DEFAULT_DAC_PDATA { \ + .mode = AD5755_MODE_CURRENT_4mA_20mA, \ + .ext_current_sense_resistor = true, \ + .enable_voltage_overrange = false, \ + .slew = { \ + .enable = false, \ + .rate = AD5755_SLEW_RATE_64k, \ + .step_size = AD5755_SLEW_STEP_SIZE_1, \ + }, \ + } + +static const struct ad5755_platform_data ad5755_default_pdata = { + .ext_dc_dc_compenstation_resistor = false, + .dc_dc_phase = AD5755_DC_DC_PHASE_ALL_SAME_EDGE, + .dc_dc_freq = AD5755_DC_DC_FREQ_410kHZ, + .dc_dc_maxv = AD5755_DC_DC_MAXV_23V, + .dac = { + [0] = AD5755_DEFAULT_DAC_PDATA, + [1] = AD5755_DEFAULT_DAC_PDATA, + [2] = AD5755_DEFAULT_DAC_PDATA, + [3] = AD5755_DEFAULT_DAC_PDATA, + }, +}; + +static int __devinit ad5755_probe(struct spi_device *spi) +{ + enum ad5755_type type = spi_get_device_id(spi)->driver_data; + const struct ad5755_platform_data *pdata = dev_get_platdata(&spi->dev); + struct iio_dev *indio_dev; + struct ad5755_state *st; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->chip_info = &ad5755_chip_info_tbl[type]; + st->spi = spi; + st->pwr_down = 0xf; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5755_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->num_channels = AD5755_NUM_CHANNELS; + + if (!pdata) + pdata = &ad5755_default_pdata; + + ret = ad5755_init_channels(indio_dev, pdata); + if (ret) + goto error_free; + + ret = ad5755_setup_pdata(indio_dev, pdata); + if (ret) + goto error_free; + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_free; + } + + return 0; + +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad5755_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + + iio_device_unregister(indio_dev); + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5755_id[] = { + { "ad5755", ID_AD5755 }, + { "ad5755-1", ID_AD5755 }, + { "ad5757", ID_AD5757 }, + { "ad5735", ID_AD5735 }, + { "ad5737", ID_AD5737 }, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5755_id); + +static struct spi_driver ad5755_driver = { + .driver = { + .name = "ad5755", + .owner = THIS_MODULE, + }, + .probe = ad5755_probe, + .remove = __devexit_p(ad5755_remove), + .id_table = ad5755_id, +}; +module_spi_driver(ad5755_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices AD5755/55-1/57/35/37 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig new file mode 100644 index 000000000000..21e27e2fc68c --- /dev/null +++ b/drivers/iio/gyro/Kconfig @@ -0,0 +1,16 @@ +# +# IIO Digital Gyroscope Sensor drivers configuration +# +menu "Digital gyroscope sensors" + +config HID_SENSOR_GYRO_3D + depends on HID_SENSOR_HUB + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select HID_SENSOR_IIO_COMMON + tristate "HID Gyroscope 3D" + help + Say yes here to build support for the HID SENSOR + Gyroscope 3D. + +endmenu diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile new file mode 100644 index 000000000000..8a895d9fcbce --- /dev/null +++ b/drivers/iio/gyro/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for industrial I/O gyroscope sensor drivers +# + +obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c new file mode 100644 index 000000000000..4c56ada51c39 --- /dev/null +++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c @@ -0,0 +1,418 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include "../common/hid-sensors/hid-sensor-attributes.h" +#include "../common/hid-sensors/hid-sensor-trigger.h" + +/*Format: HID-SENSOR-usage_id_in_hex*/ +/*Usage ID from spec for Gyro-3D: 0x200076*/ +#define DRIVER_NAME "HID-SENSOR-200076" + +enum gyro_3d_channel { + CHANNEL_SCAN_INDEX_X, + CHANNEL_SCAN_INDEX_Y, + CHANNEL_SCAN_INDEX_Z, + GYRO_3D_CHANNEL_MAX, +}; + +struct gyro_3d_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_iio_common common_attributes; + struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX]; + u32 gyro_val[GYRO_3D_CHANNEL_MAX]; +}; + +static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = { + HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS, + HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS, + HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS +}; + +/* Channel definitions */ +static const struct iio_chan_spec gyro_3d_channels[] = { + { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_X, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_X, + }, { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_Y, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Y, + }, { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Z, + } +}; + +/* Adjust channel real bits based on report descriptor */ +static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, + int channel, int size) +{ + channels[channel].scan_type.sign = 's'; + /* Real storage bits will change based on the report desc. */ + channels[channel].scan_type.realbits = size * 8; + /* Maximum size of a sample to capture is u32 */ + channels[channel].scan_type.storagebits = sizeof(u32) * 8; +} + +/* Channel read_raw handler */ +static int gyro_3d_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct gyro_3d_state *gyro_state = iio_priv(indio_dev); + int report_id = -1; + u32 address; + int ret; + int ret_type; + + *val = 0; + *val2 = 0; + switch (mask) { + case 0: + report_id = gyro_state->gyro[chan->scan_index].report_id; + address = gyro_3d_addresses[chan->scan_index]; + if (report_id >= 0) + *val = sensor_hub_input_attr_get_raw_value( + gyro_state->common_attributes.hsdev, + HID_USAGE_SENSOR_GYRO_3D, address, + report_id); + else { + *val = 0; + return -EINVAL; + } + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = gyro_state->gyro[CHANNEL_SCAN_INDEX_X].units; + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OFFSET: + *val = hid_sensor_convert_exponent( + gyro_state->gyro[CHANNEL_SCAN_INDEX_X].unit_expo); + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_read_samp_freq_value( + &gyro_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_read_raw_hyst_value( + &gyro_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + default: + ret_type = -EINVAL; + break; + } + + return ret_type; +} + +/* Channel write_raw handler */ +static int gyro_3d_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct gyro_3d_state *gyro_state = iio_priv(indio_dev); + int ret = 0; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_write_samp_freq_value( + &gyro_state->common_attributes, val, val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_write_raw_hyst_value( + &gyro_state->common_attributes, val, val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int gyro_3d_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT_PLUS_MICRO; +} + +static const struct iio_info gyro_3d_info = { + .driver_module = THIS_MODULE, + .read_raw = &gyro_3d_read_raw, + .write_raw = &gyro_3d_write_raw, + .write_raw_get_fmt = &gyro_3d_write_raw_get_fmt, +}; + +/* Function to push data to buffer */ +static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) +{ + struct iio_buffer *buffer = indio_dev->buffer; + int datum_sz; + + dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); + if (!buffer) { + dev_err(&indio_dev->dev, "Buffer == NULL\n"); + return; + } + datum_sz = buffer->access->get_bytes_per_datum(buffer); + if (len > datum_sz) { + dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, + datum_sz); + return; + } + iio_push_to_buffer(buffer, (u8 *)data); +} + +/* Callback handler to send event after all samples are received and captured */ +static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct gyro_3d_state *gyro_state = iio_priv(indio_dev); + + dev_dbg(&indio_dev->dev, "gyro_3d_proc_event [%d]\n", + gyro_state->common_attributes.data_ready); + if (gyro_state->common_attributes.data_ready) + hid_sensor_push_data(indio_dev, + (u8 *)gyro_state->gyro_val, + sizeof(gyro_state->gyro_val)); + + return 0; +} + +/* Capture samples in local storage */ +static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + size_t raw_len, char *raw_data, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct gyro_3d_state *gyro_state = iio_priv(indio_dev); + int offset; + int ret = -EINVAL; + + switch (usage_id) { + case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS: + case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS: + case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS: + offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS; + gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] = + *(u32 *)raw_data; + ret = 0; + break; + default: + break; + } + + return ret; +} + +/* Parse report which is specific to an usage id*/ +static int gyro_3d_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + struct iio_chan_spec *channels, + unsigned usage_id, + struct gyro_3d_state *st) +{ + int ret; + int i; + + for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { + ret = sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, + usage_id, + HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i, + &st->gyro[CHANNEL_SCAN_INDEX_X + i]); + if (ret < 0) + break; + gyro_3d_adjust_channel_bit_mask(channels, + CHANNEL_SCAN_INDEX_X + i, + st->gyro[CHANNEL_SCAN_INDEX_X + i].size); + } + dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n", + st->gyro[0].index, + st->gyro[0].report_id, + st->gyro[1].index, st->gyro[1].report_id, + st->gyro[2].index, st->gyro[2].report_id); + + return ret; +} + +/* Function to initialize the processing for usage id */ +static int __devinit hid_gyro_3d_probe(struct platform_device *pdev) +{ + int ret = 0; + static const char *name = "gyro_3d"; + struct iio_dev *indio_dev; + struct gyro_3d_state *gyro_state; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_chan_spec *channels; + + indio_dev = iio_device_alloc(sizeof(struct gyro_3d_state)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + platform_set_drvdata(pdev, indio_dev); + + gyro_state = iio_priv(indio_dev); + gyro_state->common_attributes.hsdev = hsdev; + gyro_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_GYRO_3D, + &gyro_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes\n"); + goto error_free_dev; + } + + channels = kmemdup(gyro_3d_channels, + sizeof(gyro_3d_channels), + GFP_KERNEL); + if (!channels) { + dev_err(&pdev->dev, "failed to duplicate channels\n"); + goto error_free_dev; + } + + ret = gyro_3d_parse_report(pdev, hsdev, channels, + HID_USAGE_SENSOR_GYRO_3D, gyro_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes\n"); + goto error_free_dev_mem; + } + + indio_dev->channels = channels; + indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels); + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &gyro_3d_info; + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + NULL, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); + goto error_free_dev_mem; + } + gyro_state->common_attributes.data_ready = false; + ret = hid_sensor_setup_trigger(indio_dev, name, + &gyro_state->common_attributes); + if (ret < 0) { + dev_err(&pdev->dev, "trigger setup failed\n"); + goto error_unreg_buffer_funcs; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&pdev->dev, "device register failed\n"); + goto error_remove_trigger; + } + + gyro_state->callbacks.send_event = gyro_3d_proc_event; + gyro_state->callbacks.capture_sample = gyro_3d_capture_sample; + gyro_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D, + &gyro_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "callback reg failed\n"); + goto error_iio_unreg; + } + + return ret; + +error_iio_unreg: + iio_device_unregister(indio_dev); +error_remove_trigger: + hid_sensor_remove_trigger(indio_dev); +error_unreg_buffer_funcs: + iio_triggered_buffer_cleanup(indio_dev); +error_free_dev_mem: + kfree(indio_dev->channels); +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +/* Function to deinitialize the processing for usage id */ +static int __devinit hid_gyro_3d_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D); + iio_device_unregister(indio_dev); + hid_sensor_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + kfree(indio_dev->channels); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver hid_gyro_3d_platform_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = hid_gyro_3d_probe, + .remove = hid_gyro_3d_remove, +}; +module_platform_driver(hid_gyro_3d_platform_driver); + +MODULE_DESCRIPTION("HID Sensor Gyroscope 3D"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 4add9bb40eeb..d4ad37455a67 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -422,7 +422,7 @@ ssize_t iio_buffer_store_enable(struct device *dev, ret = indio_dev->setup_ops->preenable(indio_dev); if (ret) { printk(KERN_ERR - "Buffer not started:" + "Buffer not started: " "buffer preenable failed\n"); goto error_ret; } @@ -431,12 +431,12 @@ ssize_t iio_buffer_store_enable(struct device *dev, ret = buffer->access->request_update(buffer); if (ret) { printk(KERN_INFO - "Buffer not started:" + "Buffer not started: " "buffer parameter update failed\n"); goto error_ret; } } - /* Definitely possible for devices to support both of these.*/ + /* Definitely possible for devices to support both of these. */ if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) { if (!indio_dev->trig) { printk(KERN_INFO @@ -456,7 +456,7 @@ ssize_t iio_buffer_store_enable(struct device *dev, ret = indio_dev->setup_ops->postenable(indio_dev); if (ret) { printk(KERN_INFO - "Buffer not started:" + "Buffer not started: " "postenable failed\n"); indio_dev->currentmode = previous_mode; if (indio_dev->setup_ops->postdisable) @@ -657,7 +657,7 @@ EXPORT_SYMBOL_GPL(iio_scan_mask_query); /** * struct iio_demux_table() - table describing demux memcpy ops * @from: index to copy from - * @to: index to copy to + * @to: index to copy to * @length: how many bytes to copy * @l: list head used for management */ @@ -682,12 +682,11 @@ static unsigned char *iio_demux(struct iio_buffer *buffer, return buffer->demux_bounce; } -int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data, - s64 timestamp) +int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data) { unsigned char *dataout = iio_demux(buffer, data); - return buffer->access->store_to(buffer, dataout, timestamp); + return buffer->access->store_to(buffer, dataout); } EXPORT_SYMBOL_GPL(iio_push_to_buffer); diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 2ec266ef41a3..6eb24dbc081e 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -29,7 +29,7 @@ #include <linux/iio/sysfs.h> #include <linux/iio/events.h> -/* IDA to assign each registered device a unique id*/ +/* IDA to assign each registered device a unique id */ static DEFINE_IDA(iio_ida); static dev_t iio_devt; @@ -99,6 +99,7 @@ static const char * const iio_chan_info_postfix[] = { [IIO_CHAN_INFO_FREQUENCY] = "frequency", [IIO_CHAN_INFO_PHASE] = "phase", [IIO_CHAN_INFO_HARDWAREGAIN] = "hardwaregain", + [IIO_CHAN_INFO_HYSTERESIS] = "hysteresis", }; const struct iio_chan_spec @@ -365,6 +366,7 @@ static ssize_t iio_read_channel_info(struct device *dev, { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + unsigned long long tmp; int val, val2; bool scale_db = false; int ret = indio_dev->info->read_raw(indio_dev, this_attr->c, @@ -390,6 +392,11 @@ static ssize_t iio_read_channel_info(struct device *dev, return sprintf(buf, "-%d.%09u\n", val, -val2); else return sprintf(buf, "%d.%09u\n", val, val2); + case IIO_VAL_FRACTIONAL: + tmp = div_s64((s64)val * 1000000000LL, val2); + val2 = do_div(tmp, 1000000000LL); + val = tmp; + return sprintf(buf, "%d.%09u\n", val, val2); default: return 0; } @@ -729,7 +736,7 @@ static int iio_device_register_sysfs(struct iio_dev *indio_dev) attrcount = attrcount_orig; /* * New channel registration method - relies on the fact a group does - * not need to be initialized if it is name is NULL. + * not need to be initialized if its name is NULL. */ if (indio_dev->channels) for (i = 0; i < indio_dev->num_channels; i++) { @@ -980,6 +987,6 @@ EXPORT_SYMBOL(iio_device_unregister); subsys_initcall(iio_init); module_exit(iio_exit); -MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>"); +MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); MODULE_DESCRIPTION("Industrial I/O core"); MODULE_LICENSE("GPL"); diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index b5afc2ff34fd..f2b78d4fe457 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -111,6 +111,7 @@ struct iio_channel *iio_channel_get(const char *name, const char *channel_name) { struct iio_map_internal *c_i = NULL, *c = NULL; struct iio_channel *channel; + int err; if (name == NULL && channel_name == NULL) return ERR_PTR(-ENODEV); @@ -130,18 +131,32 @@ struct iio_channel *iio_channel_get(const char *name, const char *channel_name) if (c == NULL) return ERR_PTR(-ENODEV); - channel = kmalloc(sizeof(*channel), GFP_KERNEL); - if (channel == NULL) - return ERR_PTR(-ENOMEM); + channel = kzalloc(sizeof(*channel), GFP_KERNEL); + if (channel == NULL) { + err = -ENOMEM; + goto error_no_mem; + } channel->indio_dev = c->indio_dev; - if (c->map->adc_channel_label) + if (c->map->adc_channel_label) { channel->channel = iio_chan_spec_from_name(channel->indio_dev, c->map->adc_channel_label); + if (channel->channel == NULL) { + err = -EINVAL; + goto error_no_chan; + } + } + return channel; + +error_no_chan: + kfree(channel); +error_no_mem: + iio_device_put(c->indio_dev); + return ERR_PTR(err); } EXPORT_SYMBOL_GPL(iio_channel_get); @@ -229,9 +244,21 @@ void iio_channel_release_all(struct iio_channel *channels) } EXPORT_SYMBOL_GPL(iio_channel_release_all); +static int iio_channel_read(struct iio_channel *chan, int *val, int *val2, + enum iio_chan_info_enum info) +{ + int unused; + + if (val2 == NULL) + val2 = &unused; + + return chan->indio_dev->info->read_raw(chan->indio_dev, chan->channel, + val, val2, info); +} + int iio_read_channel_raw(struct iio_channel *chan, int *val) { - int val2, ret; + int ret; mutex_lock(&chan->indio_dev->info_exist_lock); if (chan->indio_dev->info == NULL) { @@ -239,8 +266,7 @@ int iio_read_channel_raw(struct iio_channel *chan, int *val) goto err_unlock; } - ret = chan->indio_dev->info->read_raw(chan->indio_dev, chan->channel, - val, &val2, 0); + ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW); err_unlock: mutex_unlock(&chan->indio_dev->info_exist_lock); @@ -248,6 +274,100 @@ err_unlock: } EXPORT_SYMBOL_GPL(iio_read_channel_raw); +static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan, + int raw, int *processed, unsigned int scale) +{ + int scale_type, scale_val, scale_val2, offset; + s64 raw64 = raw; + int ret; + + ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_SCALE); + if (ret == 0) + raw64 += offset; + + scale_type = iio_channel_read(chan, &scale_val, &scale_val2, + IIO_CHAN_INFO_SCALE); + if (scale_type < 0) + return scale_type; + + switch (scale_type) { + case IIO_VAL_INT: + *processed = raw64 * scale_val; + break; + case IIO_VAL_INT_PLUS_MICRO: + if (scale_val2 < 0) + *processed = -raw64 * scale_val; + else + *processed = raw64 * scale_val; + *processed += div_s64(raw64 * (s64)scale_val2 * scale, + 1000000LL); + break; + case IIO_VAL_INT_PLUS_NANO: + if (scale_val2 < 0) + *processed = -raw64 * scale_val; + else + *processed = raw64 * scale_val; + *processed += div_s64(raw64 * (s64)scale_val2 * scale, + 1000000000LL); + break; + case IIO_VAL_FRACTIONAL: + *processed = div_s64(raw64 * (s64)scale_val * scale, + scale_val2); + break; + default: + return -EINVAL; + } + + return 0; +} + +int iio_convert_raw_to_processed(struct iio_channel *chan, int raw, + int *processed, unsigned int scale) +{ + int ret; + + mutex_lock(&chan->indio_dev->info_exist_lock); + if (chan->indio_dev->info == NULL) { + ret = -ENODEV; + goto err_unlock; + } + + ret = iio_convert_raw_to_processed_unlocked(chan, raw, processed, + scale); +err_unlock: + mutex_unlock(&chan->indio_dev->info_exist_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(iio_convert_raw_to_processed); + +int iio_read_channel_processed(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; + } + + if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) { + ret = iio_channel_read(chan, val, NULL, + IIO_CHAN_INFO_PROCESSED); + } else { + ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW); + if (ret < 0) + goto err_unlock; + ret = iio_convert_raw_to_processed_unlocked(chan, *val, val, 1); + } + +err_unlock: + mutex_unlock(&chan->indio_dev->info_exist_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(iio_read_channel_processed); + int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2) { int ret; @@ -258,10 +378,7 @@ int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2) goto err_unlock; } - ret = chan->indio_dev->info->read_raw(chan->indio_dev, - chan->channel, - val, val2, - IIO_CHAN_INFO_SCALE); + ret = iio_channel_read(chan, val, val2, IIO_CHAN_INFO_SCALE); err_unlock: mutex_unlock(&chan->indio_dev->info_exist_lock); diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 6bf9d05f4841..5bc5c860e9ca 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -6,6 +6,7 @@ #include <linux/kfifo.h> #include <linux/mutex.h> #include <linux/iio/kfifo_buf.h> +#include <linux/sched.h> struct iio_kfifo { struct iio_buffer buffer; @@ -22,7 +23,8 @@ static inline int __iio_allocate_kfifo(struct iio_kfifo *buf, return -EINVAL; __iio_update_buffer(&buf->buffer, bytes_per_datum, length); - return kfifo_alloc(&buf->kf, bytes_per_datum*length, GFP_KERNEL); + return __kfifo_alloc((struct __kfifo *)&buf->kf, length, + bytes_per_datum, GFP_KERNEL); } static int iio_request_update_kfifo(struct iio_buffer *r) @@ -35,6 +37,7 @@ static int iio_request_update_kfifo(struct iio_buffer *r) kfifo_free(&buf->kf); ret = __iio_allocate_kfifo(buf, buf->buffer.bytes_per_datum, buf->buffer.length); + r->stufftoread = false; error_ret: return ret; } @@ -81,6 +84,9 @@ static int iio_set_bytes_per_datum_kfifo(struct iio_buffer *r, size_t bpd) static int iio_set_length_kfifo(struct iio_buffer *r, int length) { + /* Avoid an invalid state */ + if (length < 2) + length = 2; if (r->length != length) { r->length = length; iio_mark_update_needed_kfifo(r); @@ -89,14 +95,16 @@ static int iio_set_length_kfifo(struct iio_buffer *r, int length) } static int iio_store_to_kfifo(struct iio_buffer *r, - u8 *data, - s64 timestamp) + u8 *data) { int ret; struct iio_kfifo *kf = iio_to_kfifo(r); - ret = kfifo_in(&kf->kf, data, r->bytes_per_datum); - if (ret != r->bytes_per_datum) + ret = kfifo_in(&kf->kf, data, 1); + if (ret != 1) return -EBUSY; + r->stufftoread = true; + wake_up_interruptible(&r->pollq); + return 0; } @@ -106,11 +114,18 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r, int ret, copied; struct iio_kfifo *kf = iio_to_kfifo(r); - if (n < r->bytes_per_datum) + if (n < r->bytes_per_datum || r->bytes_per_datum == 0) return -EINVAL; - n = rounddown(n, r->bytes_per_datum); ret = kfifo_to_user(&kf->kf, buf, n, &copied); + if (ret < 0) + return ret; + + if (kfifo_is_empty(&kf->kf)) + r->stufftoread = false; + /* verify it is still empty to avoid race */ + if (!kfifo_is_empty(&kf->kf)) + r->stufftoread = true; return copied; } @@ -136,7 +151,7 @@ struct iio_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev) iio_buffer_init(&kf->buffer); kf->buffer.attrs = &iio_kfifo_attribute_group; kf->buffer.access = &kfifo_access_funcs; - + kf->buffer.length = 2; return &kf->buffer; } EXPORT_SYMBOL(iio_kfifo_allocate); diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 91d15d2f694f..1763c9bcb98a 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -42,4 +42,14 @@ config VCNL4000 To compile this driver as a module, choose M here: the module will be called vcnl4000. +config HID_SENSOR_ALS + depends on HID_SENSOR_HUB + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select HID_SENSOR_IIO_COMMON + tristate "HID ALS" + help + Say yes here to build support for the HID SENSOR + Ambient light sensor. + endmenu diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 13f8a782d292..21a8f0df1407 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o obj-$(CONFIG_VCNL4000) += vcnl4000.o +obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c index 9a99f43094f0..164b62b91a4b 100644 --- a/drivers/iio/light/adjd_s311.c +++ b/drivers/iio/light/adjd_s311.c @@ -187,7 +187,7 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p) if (indio_dev->scan_timestamp) *(s64 *)((u8 *)data->buffer + ALIGN(len, sizeof(s64))) = time_ns; - iio_push_to_buffer(buffer, (u8 *)data->buffer, time_ns); + iio_push_to_buffer(buffer, (u8 *)data->buffer); done: iio_trigger_notify_done(indio_dev->trig); diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c new file mode 100644 index 000000000000..96e3691e42c4 --- /dev/null +++ b/drivers/iio/light/hid-sensor-als.c @@ -0,0 +1,385 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include "../common/hid-sensors/hid-sensor-attributes.h" +#include "../common/hid-sensors/hid-sensor-trigger.h" + +/*Format: HID-SENSOR-usage_id_in_hex*/ +/*Usage ID from spec for Accelerometer-3D: 0x200041*/ +#define DRIVER_NAME "HID-SENSOR-200041" + +#define CHANNEL_SCAN_INDEX_ILLUM 0 + +struct als_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_iio_common common_attributes; + struct hid_sensor_hub_attribute_info als_illum; + u32 illum; +}; + +/* Channel definitions */ +static const struct iio_chan_spec als_channels[] = { + { + .type = IIO_INTENSITY, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_BOTH, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_ILLUM, + } +}; + +/* Adjust channel real bits based on report descriptor */ +static void als_adjust_channel_bit_mask(struct iio_chan_spec *channels, + int channel, int size) +{ + channels[channel].scan_type.sign = 's'; + /* Real storage bits will change based on the report desc. */ + channels[channel].scan_type.realbits = size * 8; + /* Maximum size of a sample to capture is u32 */ + channels[channel].scan_type.storagebits = sizeof(u32) * 8; +} + +/* Channel read_raw handler */ +static int als_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct als_state *als_state = iio_priv(indio_dev); + int report_id = -1; + u32 address; + int ret; + int ret_type; + + *val = 0; + *val2 = 0; + switch (mask) { + case 0: + switch (chan->scan_index) { + case CHANNEL_SCAN_INDEX_ILLUM: + report_id = als_state->als_illum.report_id; + address = + HID_USAGE_SENSOR_LIGHT_ILLUM; + break; + default: + report_id = -1; + break; + } + if (report_id >= 0) + *val = sensor_hub_input_attr_get_raw_value( + als_state->common_attributes.hsdev, + HID_USAGE_SENSOR_ALS, address, + report_id); + else { + *val = 0; + return -EINVAL; + } + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = als_state->als_illum.units; + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OFFSET: + *val = hid_sensor_convert_exponent( + als_state->als_illum.unit_expo); + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_read_samp_freq_value( + &als_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_read_raw_hyst_value( + &als_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + default: + ret_type = -EINVAL; + break; + } + + return ret_type; +} + +/* Channel write_raw handler */ +static int als_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct als_state *als_state = iio_priv(indio_dev); + int ret = 0; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_write_samp_freq_value( + &als_state->common_attributes, val, val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_write_raw_hyst_value( + &als_state->common_attributes, val, val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int als_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT_PLUS_MICRO; +} + +static const struct iio_info als_info = { + .driver_module = THIS_MODULE, + .read_raw = &als_read_raw, + .write_raw = &als_write_raw, + .write_raw_get_fmt = &als_write_raw_get_fmt, +}; + +/* Function to push data to buffer */ +static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) +{ + struct iio_buffer *buffer = indio_dev->buffer; + int datum_sz; + + dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); + if (!buffer) { + dev_err(&indio_dev->dev, "Buffer == NULL\n"); + return; + } + datum_sz = buffer->access->get_bytes_per_datum(buffer); + if (len > datum_sz) { + dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, + datum_sz); + return; + } + iio_push_to_buffer(buffer, (u8 *)data); +} + +/* Callback handler to send event after all samples are received and captured */ +static int als_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct als_state *als_state = iio_priv(indio_dev); + + dev_dbg(&indio_dev->dev, "als_proc_event [%d]\n", + als_state->common_attributes.data_ready); + if (als_state->common_attributes.data_ready) + hid_sensor_push_data(indio_dev, + (u8 *)&als_state->illum, + sizeof(als_state->illum)); + + return 0; +} + +/* Capture samples in local storage */ +static int als_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + size_t raw_len, char *raw_data, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct als_state *als_state = iio_priv(indio_dev); + int ret = -EINVAL; + + switch (usage_id) { + case HID_USAGE_SENSOR_LIGHT_ILLUM: + als_state->illum = *(u32 *)raw_data; + ret = 0; + break; + default: + break; + } + + return ret; +} + +/* Parse report which is specific to an usage id*/ +static int als_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + struct iio_chan_spec *channels, + unsigned usage_id, + struct als_state *st) +{ + int ret; + + ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT, + usage_id, + HID_USAGE_SENSOR_LIGHT_ILLUM, + &st->als_illum); + if (ret < 0) + return ret; + als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM, + st->als_illum.size); + + dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index, + st->als_illum.report_id); + + return ret; +} + +/* Function to initialize the processing for usage id */ +static int __devinit hid_als_probe(struct platform_device *pdev) +{ + int ret = 0; + static const char *name = "als"; + struct iio_dev *indio_dev; + struct als_state *als_state; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_chan_spec *channels; + + indio_dev = iio_device_alloc(sizeof(struct als_state)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + platform_set_drvdata(pdev, indio_dev); + + als_state = iio_priv(indio_dev); + als_state->common_attributes.hsdev = hsdev; + als_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_ALS, + &als_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes\n"); + goto error_free_dev; + } + + channels = kmemdup(als_channels, + sizeof(als_channels), + GFP_KERNEL); + if (!channels) { + dev_err(&pdev->dev, "failed to duplicate channels\n"); + goto error_free_dev; + } + + ret = als_parse_report(pdev, hsdev, channels, + HID_USAGE_SENSOR_ALS, als_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes\n"); + goto error_free_dev_mem; + } + + indio_dev->channels = channels; + indio_dev->num_channels = + ARRAY_SIZE(als_channels); + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &als_info; + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + NULL, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); + goto error_free_dev_mem; + } + als_state->common_attributes.data_ready = false; + ret = hid_sensor_setup_trigger(indio_dev, name, + &als_state->common_attributes); + if (ret < 0) { + dev_err(&pdev->dev, "trigger setup failed\n"); + goto error_unreg_buffer_funcs; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&pdev->dev, "device register failed\n"); + goto error_remove_trigger; + } + + als_state->callbacks.send_event = als_proc_event; + als_state->callbacks.capture_sample = als_capture_sample; + als_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS, + &als_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "callback reg failed\n"); + goto error_iio_unreg; + } + + return ret; + +error_iio_unreg: + iio_device_unregister(indio_dev); +error_remove_trigger: + hid_sensor_remove_trigger(indio_dev); +error_unreg_buffer_funcs: + iio_triggered_buffer_cleanup(indio_dev); +error_free_dev_mem: + kfree(indio_dev->channels); +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +/* Function to deinitialize the processing for usage id */ +static int __devinit hid_als_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS); + iio_device_unregister(indio_dev); + hid_sensor_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + kfree(indio_dev->channels); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver hid_als_platform_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = hid_als_probe, + .remove = hid_als_remove, +}; +module_platform_driver(hid_als_platform_driver); + +MODULE_DESCRIPTION("HID Sensor ALS"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig new file mode 100644 index 000000000000..c1f0cdd57037 --- /dev/null +++ b/drivers/iio/magnetometer/Kconfig @@ -0,0 +1,16 @@ +# +# Magnetometer sensors +# +menu "Magnetometer sensors" + +config HID_SENSOR_MAGNETOMETER_3D + depends on HID_SENSOR_HUB + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select HID_SENSOR_IIO_COMMON + tristate "HID Magenetometer 3D" + help + Say yes here to build support for the HID SENSOR + Magnetometer 3D. + +endmenu diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile new file mode 100644 index 000000000000..60dc4f2b1963 --- /dev/null +++ b/drivers/iio/magnetometer/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for industrial I/O Magnetometer sensor drivers +# + +obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c new file mode 100644 index 000000000000..c4f0d274f577 --- /dev/null +++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c @@ -0,0 +1,419 @@ +/* + * HID Sensors Driver + * Copyright (c) 2012, 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include "../common/hid-sensors/hid-sensor-attributes.h" +#include "../common/hid-sensors/hid-sensor-trigger.h" + +/*Format: HID-SENSOR-usage_id_in_hex*/ +/*Usage ID from spec for Magnetometer-3D: 0x200083*/ +#define DRIVER_NAME "HID-SENSOR-200083" + +enum magn_3d_channel { + CHANNEL_SCAN_INDEX_X, + CHANNEL_SCAN_INDEX_Y, + CHANNEL_SCAN_INDEX_Z, + MAGN_3D_CHANNEL_MAX, +}; + +struct magn_3d_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_iio_common common_attributes; + struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX]; + u32 magn_val[MAGN_3D_CHANNEL_MAX]; +}; + +static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = { + HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS, + HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS, + HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS +}; + +/* Channel definitions */ +static const struct iio_chan_spec magn_3d_channels[] = { + { + .type = IIO_MAGN, + .modified = 1, + .channel2 = IIO_MOD_X, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_X, + }, { + .type = IIO_MAGN, + .modified = 1, + .channel2 = IIO_MOD_Y, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Y, + }, { + .type = IIO_MAGN, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT | + IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT, + .scan_index = CHANNEL_SCAN_INDEX_Z, + } +}; + +/* Adjust channel real bits based on report descriptor */ +static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, + int channel, int size) +{ + channels[channel].scan_type.sign = 's'; + /* Real storage bits will change based on the report desc. */ + channels[channel].scan_type.realbits = size * 8; + /* Maximum size of a sample to capture is u32 */ + channels[channel].scan_type.storagebits = sizeof(u32) * 8; +} + +/* Channel read_raw handler */ +static int magn_3d_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct magn_3d_state *magn_state = iio_priv(indio_dev); + int report_id = -1; + u32 address; + int ret; + int ret_type; + + *val = 0; + *val2 = 0; + switch (mask) { + case 0: + report_id = + magn_state->magn[chan->scan_index].report_id; + address = magn_3d_addresses[chan->scan_index]; + if (report_id >= 0) + *val = sensor_hub_input_attr_get_raw_value( + magn_state->common_attributes.hsdev, + HID_USAGE_SENSOR_COMPASS_3D, address, + report_id); + else { + *val = 0; + return -EINVAL; + } + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = magn_state->magn[CHANNEL_SCAN_INDEX_X].units; + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OFFSET: + *val = hid_sensor_convert_exponent( + magn_state->magn[CHANNEL_SCAN_INDEX_X].unit_expo); + ret_type = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_read_samp_freq_value( + &magn_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_read_raw_hyst_value( + &magn_state->common_attributes, val, val2); + ret_type = IIO_VAL_INT_PLUS_MICRO; + break; + default: + ret_type = -EINVAL; + break; + } + + return ret_type; +} + +/* Channel write_raw handler */ +static int magn_3d_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct magn_3d_state *magn_state = iio_priv(indio_dev); + int ret = 0; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_write_samp_freq_value( + &magn_state->common_attributes, val, val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_write_raw_hyst_value( + &magn_state->common_attributes, val, val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int magn_3d_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT_PLUS_MICRO; +} + +static const struct iio_info magn_3d_info = { + .driver_module = THIS_MODULE, + .read_raw = &magn_3d_read_raw, + .write_raw = &magn_3d_write_raw, + .write_raw_get_fmt = &magn_3d_write_raw_get_fmt, +}; + +/* Function to push data to buffer */ +static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) +{ + struct iio_buffer *buffer = indio_dev->buffer; + int datum_sz; + + dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); + if (!buffer) { + dev_err(&indio_dev->dev, "Buffer == NULL\n"); + return; + } + datum_sz = buffer->access->get_bytes_per_datum(buffer); + if (len > datum_sz) { + dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, + datum_sz); + return; + } + iio_push_to_buffer(buffer, (u8 *)data); +} + +/* Callback handler to send event after all samples are received and captured */ +static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct magn_3d_state *magn_state = iio_priv(indio_dev); + + dev_dbg(&indio_dev->dev, "magn_3d_proc_event [%d]\n", + magn_state->common_attributes.data_ready); + if (magn_state->common_attributes.data_ready) + hid_sensor_push_data(indio_dev, + (u8 *)magn_state->magn_val, + sizeof(magn_state->magn_val)); + + return 0; +} + +/* Capture samples in local storage */ +static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + size_t raw_len, char *raw_data, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct magn_3d_state *magn_state = iio_priv(indio_dev); + int offset; + int ret = -EINVAL; + + switch (usage_id) { + case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS: + case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS: + case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS: + offset = usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS; + magn_state->magn_val[CHANNEL_SCAN_INDEX_X + offset] = + *(u32 *)raw_data; + ret = 0; + break; + default: + break; + } + + return ret; +} + +/* Parse report which is specific to an usage id*/ +static int magn_3d_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + struct iio_chan_spec *channels, + unsigned usage_id, + struct magn_3d_state *st) +{ + int ret; + int i; + + for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { + ret = sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, + usage_id, + HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS + i, + &st->magn[CHANNEL_SCAN_INDEX_X + i]); + if (ret < 0) + break; + magn_3d_adjust_channel_bit_mask(channels, + CHANNEL_SCAN_INDEX_X + i, + st->magn[CHANNEL_SCAN_INDEX_X + i].size); + } + dev_dbg(&pdev->dev, "magn_3d %x:%x, %x:%x, %x:%x\n", + st->magn[0].index, + st->magn[0].report_id, + st->magn[1].index, st->magn[1].report_id, + st->magn[2].index, st->magn[2].report_id); + + return ret; +} + +/* Function to initialize the processing for usage id */ +static int __devinit hid_magn_3d_probe(struct platform_device *pdev) +{ + int ret = 0; + static char *name = "magn_3d"; + struct iio_dev *indio_dev; + struct magn_3d_state *magn_state; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_chan_spec *channels; + + indio_dev = iio_device_alloc(sizeof(struct magn_3d_state)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + platform_set_drvdata(pdev, indio_dev); + + magn_state = iio_priv(indio_dev); + magn_state->common_attributes.hsdev = hsdev; + magn_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_COMPASS_3D, + &magn_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes\n"); + goto error_free_dev; + } + + channels = kmemdup(magn_3d_channels, + sizeof(magn_3d_channels), + GFP_KERNEL); + if (!channels) { + dev_err(&pdev->dev, "failed to duplicate channels\n"); + goto error_free_dev; + } + + ret = magn_3d_parse_report(pdev, hsdev, channels, + HID_USAGE_SENSOR_COMPASS_3D, magn_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes\n"); + goto error_free_dev_mem; + } + + indio_dev->channels = channels; + indio_dev->num_channels = ARRAY_SIZE(magn_3d_channels); + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &magn_3d_info; + indio_dev->name = name; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + NULL, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); + goto error_free_dev_mem; + } + magn_state->common_attributes.data_ready = false; + ret = hid_sensor_setup_trigger(indio_dev, name, + &magn_state->common_attributes); + if (ret < 0) { + dev_err(&pdev->dev, "trigger setup failed\n"); + goto error_unreg_buffer_funcs; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&pdev->dev, "device register failed\n"); + goto error_remove_trigger; + } + + magn_state->callbacks.send_event = magn_3d_proc_event; + magn_state->callbacks.capture_sample = magn_3d_capture_sample; + magn_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D, + &magn_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "callback reg failed\n"); + goto error_iio_unreg; + } + + return ret; + +error_iio_unreg: + iio_device_unregister(indio_dev); +error_remove_trigger: + hid_sensor_remove_trigger(indio_dev); +error_unreg_buffer_funcs: + iio_triggered_buffer_cleanup(indio_dev); +error_free_dev_mem: + kfree(indio_dev->channels); +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +/* Function to deinitialize the processing for usage id */ +static int __devinit hid_magn_3d_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D); + iio_device_unregister(indio_dev); + hid_sensor_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + kfree(indio_dev->channels); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver hid_magn_3d_platform_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = hid_magn_3d_probe, + .remove = hid_magn_3d_remove, +}; +module_platform_driver(hid_magn_3d_platform_driver); + +MODULE_DESCRIPTION("HID Sensor Magnetometer 3D"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_LICENSE("GPL"); |
