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-rw-r--r--drivers/input/misc/Kconfig12
-rw-r--r--drivers/input/misc/Makefile2
-rw-r--r--drivers/input/misc/axp20x-pek.c2
-rw-r--r--drivers/input/misc/ims-pcu.c16
-rw-r--r--drivers/input/misc/pwm-vibra.c267
-rw-r--r--drivers/input/misc/uinput.c57
6 files changed, 335 insertions, 21 deletions
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index f47e836eaa0f..9f082a388388 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -581,6 +581,18 @@ config INPUT_PWM_BEEPER
To compile this driver as a module, choose M here: the module will be
called pwm-beeper.
+config INPUT_PWM_VIBRA
+ tristate "PWM vibrator support"
+ depends on PWM
+ select INPUT_FF_MEMLESS
+ help
+ Say Y here to get support for PWM based vibrator devices.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the module will be
+ called pwm-vibra.
+
config INPUT_RK805_PWRKEY
tristate "Rockchip RK805 PMIC power key support"
depends on MFD_RK808
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 1072e0760c19..4b6118d313fe 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the input misc drivers.
#
@@ -59,6 +60,7 @@ obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR) += pm8xxx-vibrator.o
obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o
obj-$(CONFIG_INPUT_POWERMATE) += powermate.o
obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o
+obj-$(CONFIG_INPUT_PWM_VIBRA) += pwm-vibra.o
obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o
obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o
obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o
diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index 6cee5adc3b5c..debeeaeb8812 100644
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -403,6 +403,7 @@ static const struct platform_device_id axp_pek_id_match[] = {
},
{ /* sentinel */ }
};
+MODULE_DEVICE_TABLE(platform, axp_pek_id_match);
static struct platform_driver axp20x_pek_driver = {
.probe = axp20x_pek_probe,
@@ -417,4 +418,3 @@ module_platform_driver(axp20x_pek_driver);
MODULE_DESCRIPTION("axp20x Power Button");
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:axp20x-pek");
diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c
index 6bf82ea8c918..ae473123583b 100644
--- a/drivers/input/misc/ims-pcu.c
+++ b/drivers/input/misc/ims-pcu.c
@@ -1635,13 +1635,25 @@ ims_pcu_get_cdc_union_desc(struct usb_interface *intf)
return NULL;
}
- while (buflen > 0) {
+ while (buflen >= sizeof(*union_desc)) {
union_desc = (struct usb_cdc_union_desc *)buf;
+ if (union_desc->bLength > buflen) {
+ dev_err(&intf->dev, "Too large descriptor\n");
+ return NULL;
+ }
+
if (union_desc->bDescriptorType == USB_DT_CS_INTERFACE &&
union_desc->bDescriptorSubType == USB_CDC_UNION_TYPE) {
dev_dbg(&intf->dev, "Found union header\n");
- return union_desc;
+
+ if (union_desc->bLength >= sizeof(*union_desc))
+ return union_desc;
+
+ dev_err(&intf->dev,
+ "Union descriptor to short (%d vs %zd\n)",
+ union_desc->bLength, sizeof(*union_desc));
+ return NULL;
}
buflen -= union_desc->bLength;
diff --git a/drivers/input/misc/pwm-vibra.c b/drivers/input/misc/pwm-vibra.c
new file mode 100644
index 000000000000..55da191ae550
--- /dev/null
+++ b/drivers/input/misc/pwm-vibra.c
@@ -0,0 +1,267 @@
+/*
+ * PWM vibrator driver
+ *
+ * Copyright (C) 2017 Collabora Ltd.
+ *
+ * Based on previous work from:
+ * Copyright (C) 2012 Dmitry Torokhov <dmitry.torokhov@gmail.com>
+ *
+ * Based on PWM beeper driver:
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/pwm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+struct pwm_vibrator {
+ struct input_dev *input;
+ struct pwm_device *pwm;
+ struct pwm_device *pwm_dir;
+ struct regulator *vcc;
+
+ struct work_struct play_work;
+ u16 level;
+ u32 direction_duty_cycle;
+};
+
+static int pwm_vibrator_start(struct pwm_vibrator *vibrator)
+{
+ struct device *pdev = vibrator->input->dev.parent;
+ struct pwm_state state;
+ int err;
+
+ err = regulator_enable(vibrator->vcc);
+ if (err) {
+ dev_err(pdev, "failed to enable regulator: %d", err);
+ return err;
+ }
+
+ pwm_get_state(vibrator->pwm, &state);
+ pwm_set_relative_duty_cycle(&state, vibrator->level, 0xffff);
+ state.enabled = true;
+
+ err = pwm_apply_state(vibrator->pwm, &state);
+ if (err) {
+ dev_err(pdev, "failed to apply pwm state: %d", err);
+ return err;
+ }
+
+ if (vibrator->pwm_dir) {
+ pwm_get_state(vibrator->pwm_dir, &state);
+ state.duty_cycle = vibrator->direction_duty_cycle;
+ state.enabled = true;
+
+ err = pwm_apply_state(vibrator->pwm_dir, &state);
+ if (err) {
+ dev_err(pdev, "failed to apply dir-pwm state: %d", err);
+ pwm_disable(vibrator->pwm);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void pwm_vibrator_stop(struct pwm_vibrator *vibrator)
+{
+ regulator_disable(vibrator->vcc);
+
+ if (vibrator->pwm_dir)
+ pwm_disable(vibrator->pwm_dir);
+ pwm_disable(vibrator->pwm);
+}
+
+static void pwm_vibrator_play_work(struct work_struct *work)
+{
+ struct pwm_vibrator *vibrator = container_of(work,
+ struct pwm_vibrator, play_work);
+
+ if (vibrator->level)
+ pwm_vibrator_start(vibrator);
+ else
+ pwm_vibrator_stop(vibrator);
+}
+
+static int pwm_vibrator_play_effect(struct input_dev *dev, void *data,
+ struct ff_effect *effect)
+{
+ struct pwm_vibrator *vibrator = input_get_drvdata(dev);
+
+ vibrator->level = effect->u.rumble.strong_magnitude;
+ if (!vibrator->level)
+ vibrator->level = effect->u.rumble.weak_magnitude;
+
+ schedule_work(&vibrator->play_work);
+
+ return 0;
+}
+
+static void pwm_vibrator_close(struct input_dev *input)
+{
+ struct pwm_vibrator *vibrator = input_get_drvdata(input);
+
+ cancel_work_sync(&vibrator->play_work);
+ pwm_vibrator_stop(vibrator);
+}
+
+static int pwm_vibrator_probe(struct platform_device *pdev)
+{
+ struct pwm_vibrator *vibrator;
+ struct pwm_state state;
+ int err;
+
+ vibrator = devm_kzalloc(&pdev->dev, sizeof(*vibrator), GFP_KERNEL);
+ if (!vibrator)
+ return -ENOMEM;
+
+ vibrator->input = devm_input_allocate_device(&pdev->dev);
+ if (!vibrator->input)
+ return -ENOMEM;
+
+ vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ err = PTR_ERR_OR_ZERO(vibrator->vcc);
+ if (err) {
+ if (err != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to request regulator: %d",
+ err);
+ return err;
+ }
+
+ vibrator->pwm = devm_pwm_get(&pdev->dev, "enable");
+ err = PTR_ERR_OR_ZERO(vibrator->pwm);
+ if (err) {
+ if (err != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to request main pwm: %d",
+ err);
+ return err;
+ }
+
+ INIT_WORK(&vibrator->play_work, pwm_vibrator_play_work);
+
+ /* Sync up PWM state and ensure it is off. */
+ pwm_init_state(vibrator->pwm, &state);
+ state.enabled = false;
+ err = pwm_apply_state(vibrator->pwm, &state);
+ if (err) {
+ dev_err(&pdev->dev, "failed to apply initial PWM state: %d",
+ err);
+ return err;
+ }
+
+ vibrator->pwm_dir = devm_pwm_get(&pdev->dev, "direction");
+ err = PTR_ERR_OR_ZERO(vibrator->pwm_dir);
+ switch (err) {
+ case 0:
+ /* Sync up PWM state and ensure it is off. */
+ pwm_init_state(vibrator->pwm_dir, &state);
+ state.enabled = false;
+ err = pwm_apply_state(vibrator->pwm_dir, &state);
+ if (err) {
+ dev_err(&pdev->dev, "failed to apply initial PWM state: %d",
+ err);
+ return err;
+ }
+
+ vibrator->direction_duty_cycle =
+ pwm_get_period(vibrator->pwm_dir) / 2;
+ device_property_read_u32(&pdev->dev, "direction-duty-cycle-ns",
+ &vibrator->direction_duty_cycle);
+ break;
+
+ case -ENODATA:
+ /* Direction PWM is optional */
+ vibrator->pwm_dir = NULL;
+ break;
+
+ default:
+ dev_err(&pdev->dev, "Failed to request direction pwm: %d", err);
+ /* Fall through */
+
+ case -EPROBE_DEFER:
+ return err;
+ }
+
+ vibrator->input->name = "pwm-vibrator";
+ vibrator->input->id.bustype = BUS_HOST;
+ vibrator->input->dev.parent = &pdev->dev;
+ vibrator->input->close = pwm_vibrator_close;
+
+ input_set_drvdata(vibrator->input, vibrator);
+ input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
+
+ err = input_ff_create_memless(vibrator->input, NULL,
+ pwm_vibrator_play_effect);
+ if (err) {
+ dev_err(&pdev->dev, "Couldn't create FF dev: %d", err);
+ return err;
+ }
+
+ err = input_register_device(vibrator->input);
+ if (err) {
+ dev_err(&pdev->dev, "Couldn't register input dev: %d", err);
+ return err;
+ }
+
+ platform_set_drvdata(pdev, vibrator);
+
+ return 0;
+}
+
+static int __maybe_unused pwm_vibrator_suspend(struct device *dev)
+{
+ struct pwm_vibrator *vibrator = dev_get_drvdata(dev);
+
+ cancel_work_sync(&vibrator->play_work);
+ if (vibrator->level)
+ pwm_vibrator_stop(vibrator);
+
+ return 0;
+}
+
+static int __maybe_unused pwm_vibrator_resume(struct device *dev)
+{
+ struct pwm_vibrator *vibrator = dev_get_drvdata(dev);
+
+ if (vibrator->level)
+ pwm_vibrator_start(vibrator);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(pwm_vibrator_pm_ops,
+ pwm_vibrator_suspend, pwm_vibrator_resume);
+
+#ifdef CONFIG_OF
+static const struct of_device_id pwm_vibra_dt_match_table[] = {
+ { .compatible = "pwm-vibrator" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pwm_vibra_dt_match_table);
+#endif
+
+static struct platform_driver pwm_vibrator_driver = {
+ .probe = pwm_vibrator_probe,
+ .driver = {
+ .name = "pwm-vibrator",
+ .pm = &pwm_vibrator_pm_ops,
+ .of_match_table = of_match_ptr(pwm_vibra_dt_match_table),
+ },
+};
+module_platform_driver(pwm_vibrator_driver);
+
+MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
+MODULE_DESCRIPTION("PWM vibrator driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pwm-vibrator");
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 022be0e22eba..443151de90c6 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -98,14 +98,15 @@ static int uinput_request_reserve_slot(struct uinput_device *udev,
uinput_request_alloc_id(udev, request));
}
-static void uinput_request_done(struct uinput_device *udev,
- struct uinput_request *request)
+static void uinput_request_release_slot(struct uinput_device *udev,
+ unsigned int id)
{
/* Mark slot as available */
- udev->requests[request->id] = NULL;
- wake_up(&udev->requests_waitq);
+ spin_lock(&udev->requests_lock);
+ udev->requests[id] = NULL;
+ spin_unlock(&udev->requests_lock);
- complete(&request->done);
+ wake_up(&udev->requests_waitq);
}
static int uinput_request_send(struct uinput_device *udev,
@@ -138,20 +139,22 @@ static int uinput_request_send(struct uinput_device *udev,
static int uinput_request_submit(struct uinput_device *udev,
struct uinput_request *request)
{
- int error;
+ int retval;
- error = uinput_request_reserve_slot(udev, request);
- if (error)
- return error;
+ retval = uinput_request_reserve_slot(udev, request);
+ if (retval)
+ return retval;
- error = uinput_request_send(udev, request);
- if (error) {
- uinput_request_done(udev, request);
- return error;
- }
+ retval = uinput_request_send(udev, request);
+ if (retval)
+ goto out;
wait_for_completion(&request->done);
- return request->retval;
+ retval = request->retval;
+
+ out:
+ uinput_request_release_slot(udev, request->id);
+ return retval;
}
/*
@@ -169,7 +172,7 @@ static void uinput_flush_requests(struct uinput_device *udev)
request = udev->requests[i];
if (request) {
request->retval = -ENODEV;
- uinput_request_done(udev, request);
+ complete(&request->done);
}
}
@@ -230,6 +233,18 @@ static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
return uinput_request_submit(udev, &request);
}
+static int uinput_dev_flush(struct input_dev *dev, struct file *file)
+{
+ /*
+ * If we are called with file == NULL that means we are tearing
+ * down the device, and therefore we can not handle FF erase
+ * requests: either we are handling UI_DEV_DESTROY (and holding
+ * the udev->mutex), or the file descriptor is closed and there is
+ * nobody on the other side anymore.
+ */
+ return file ? input_ff_flush(dev, file) : 0;
+}
+
static void uinput_destroy_device(struct uinput_device *udev)
{
const char *name, *phys;
@@ -297,6 +312,12 @@ static int uinput_create_device(struct uinput_device *udev)
dev->ff->playback = uinput_dev_playback;
dev->ff->set_gain = uinput_dev_set_gain;
dev->ff->set_autocenter = uinput_dev_set_autocenter;
+ /*
+ * The standard input_ff_flush() implementation does
+ * not quite work for uinput as we can't reasonably
+ * handle FF requests during device teardown.
+ */
+ dev->flush = uinput_dev_flush;
}
error = input_register_device(udev->dev);
@@ -939,7 +960,7 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
}
req->retval = ff_up.retval;
- uinput_request_done(udev, req);
+ complete(&req->done);
goto out;
case UI_END_FF_ERASE:
@@ -955,7 +976,7 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
}
req->retval = ff_erase.retval;
- uinput_request_done(udev, req);
+ complete(&req->done);
goto out;
}
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