linux/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
Greg Kroah-Hartman df47c0a638 Fifth set of IIO fixes for the 4.11 cycle.
As these are rather late in the cycle, they may sneak over into 4.12.
 There is a fix for a regression caused by another fix (hid sensors
 hardware seems to vary a lot in how various corner cases are handled).
 
 * ad7303
   - fix channel description. Numeric values were being passed as characters
   presumably leading to garbage from the userspace interface.
 * as3935
   - the write data macro was wrong so fix it.
 * bmp280
   - incorrect handling of negative values as being unsigned broke humidity
   calculation.
 * hid-sensor
   - Restore the poll and hysteresis values after resume as some hardware
   doesn't do it.
 * stm32-trigger
   - buglet in reading the sampling frequency
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCAAvFiEEbilms4eEBlKRJoGxVIU0mcT0FogFAljw8ScRHGppYzIzQGtl
 cm5lbC5vcmcACgkQVIU0mcT0FojZvBAAh8K9e+3ObpS6/0wj26/XsakiFn4v2ah0
 xKUnafxAVVxU3AU01IJ3CtNdIMyqMwpnB+PvnpgDzZw749QrYKPsBIzheK64eabe
 fzA34X5MWGLwUdOXpfEB0xvsylWjJrqsf1rahgZjiUKkPeZe9EwzPM/fP1sEl5gu
 p+vfSMckboFaKheoQwnWMUTBp0HK+nbFpcSBzljX68u+epiXpDGrjuZC8NJ3JuBn
 Bloz9AhDliIn477H7mIUTXBbt3ixLIDiJ7haQuTNlagosPoUtCBpwY2O9mZ7VRVs
 wM62h7/F170077ReQJRjlfck+7uHoIgDeS46w5UYTzA1HJLxs+veO5xv3VOtHIUg
 BZ+mibQyIUBrFeyYDVbeUpBTffiU6rA+yiM4WFwUFabl7t7rlG0NhLEx7OIQcFMm
 l8u/5JUoJcoykaO8c9Jx5XtrgkXq+rCWVAmhjHqUDAlvsMa6pJWEyqgaVcQeIbdw
 ns9ppJRlOmEst7lMab9TI7BJp3oCIH6uRmctbme42Rw8XgDFdltxqkxmjB8d+cDC
 Q0INhNJN1jRgz6rT6lkxVhAYKtaP5T8qZeliT4MO1E59ggOVSSf8zuhjrEMUK397
 Tu/k7fmATtiKSG+blwYZVRC3+ixh/oKZsvfwZ4O+mFJyhQ616nKMYAywoaZcM8WT
 Z1ABipUDwsE=
 =H5KS
 -----END PGP SIGNATURE-----

Merge tag 'iio-fixes-for-4.11e' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Fifth set of IIO fixes for the 4.11 cycle.

As these are rather late in the cycle, they may sneak over into 4.12.
There is a fix for a regression caused by another fix (hid sensors
hardware seems to vary a lot in how various corner cases are handled).

* ad7303
  - fix channel description. Numeric values were being passed as characters
  presumably leading to garbage from the userspace interface.
* as3935
  - the write data macro was wrong so fix it.
* bmp280
  - incorrect handling of negative values as being unsigned broke humidity
  calculation.
* hid-sensor
  - Restore the poll and hysteresis values after resume as some hardware
  doesn't do it.
* stm32-trigger
  - buglet in reading the sampling frequency
2017-04-18 19:38:38 +02:00

256 lines
7.2 KiB
C

/*
* 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/delay.h>
#include <linux/hid-sensor-hub.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/iio/sysfs.h>
#include "hid-sensor-trigger.h"
static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state)
{
int state_val;
int report_val;
s32 poll_value = 0;
if (state) {
if (!atomic_read(&st->user_requested_state))
return 0;
if (sensor_hub_device_open(st->hsdev))
return -EIO;
atomic_inc(&st->data_ready);
state_val = hid_sensor_get_usage_index(st->hsdev,
st->power_state.report_id,
st->power_state.index,
HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM);
report_val = hid_sensor_get_usage_index(st->hsdev,
st->report_state.report_id,
st->report_state.index,
HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM);
poll_value = hid_sensor_read_poll_value(st);
} else {
int val;
val = atomic_dec_if_positive(&st->data_ready);
if (val < 0)
return 0;
sensor_hub_device_close(st->hsdev);
state_val = hid_sensor_get_usage_index(st->hsdev,
st->power_state.report_id,
st->power_state.index,
HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM);
report_val = hid_sensor_get_usage_index(st->hsdev,
st->report_state.report_id,
st->report_state.index,
HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM);
}
if (state_val >= 0) {
state_val += st->power_state.logical_minimum;
sensor_hub_set_feature(st->hsdev, st->power_state.report_id,
st->power_state.index, sizeof(state_val),
&state_val);
}
if (report_val >= 0) {
report_val += st->report_state.logical_minimum;
sensor_hub_set_feature(st->hsdev, st->report_state.report_id,
st->report_state.index,
sizeof(report_val),
&report_val);
}
sensor_hub_get_feature(st->hsdev, st->power_state.report_id,
st->power_state.index,
sizeof(state_val), &state_val);
if (state && poll_value)
msleep_interruptible(poll_value * 2);
return 0;
}
EXPORT_SYMBOL(hid_sensor_power_state);
int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
{
#ifdef CONFIG_PM
int ret;
atomic_set(&st->user_requested_state, state);
if (state)
ret = pm_runtime_get_sync(&st->pdev->dev);
else {
pm_runtime_mark_last_busy(&st->pdev->dev);
ret = pm_runtime_put_autosuspend(&st->pdev->dev);
}
if (ret < 0) {
if (state)
pm_runtime_put_noidle(&st->pdev->dev);
return ret;
}
return 0;
#else
atomic_set(&st->user_requested_state, state);
return _hid_sensor_power_state(st, state);
#endif
}
static void hid_sensor_set_power_work(struct work_struct *work)
{
struct hid_sensor_common *attrb = container_of(work,
struct hid_sensor_common,
work);
if (attrb->poll_interval >= 0)
sensor_hub_set_feature(attrb->hsdev, attrb->poll.report_id,
attrb->poll.index,
sizeof(attrb->poll_interval),
&attrb->poll_interval);
if (attrb->raw_hystersis >= 0)
sensor_hub_set_feature(attrb->hsdev,
attrb->sensitivity.report_id,
attrb->sensitivity.index,
sizeof(attrb->raw_hystersis),
&attrb->raw_hystersis);
_hid_sensor_power_state(attrb, true);
}
static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state);
}
void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
{
pm_runtime_disable(&attrb->pdev->dev);
pm_runtime_set_suspended(&attrb->pdev->dev);
pm_runtime_put_noidle(&attrb->pdev->dev);
cancel_work_sync(&attrb->work);
iio_trigger_unregister(attrb->trigger);
iio_trigger_free(attrb->trigger);
}
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_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;
iio_trigger_set_drvdata(trig, 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;
}
attrb->trigger = trig;
indio_dev->trig = iio_trigger_get(trig);
ret = pm_runtime_set_active(&indio_dev->dev);
if (ret)
goto error_unreg_trigger;
iio_device_set_drvdata(indio_dev, attrb);
INIT_WORK(&attrb->work, hid_sensor_set_power_work);
pm_suspend_ignore_children(&attrb->pdev->dev, true);
pm_runtime_enable(&attrb->pdev->dev);
/* Default to 3 seconds, but can be changed from sysfs */
pm_runtime_set_autosuspend_delay(&attrb->pdev->dev,
3000);
pm_runtime_use_autosuspend(&attrb->pdev->dev);
return ret;
error_unreg_trigger:
iio_trigger_unregister(trig);
error_free_trig:
iio_trigger_free(trig);
error_ret:
return ret;
}
EXPORT_SYMBOL(hid_sensor_setup_trigger);
static int __maybe_unused hid_sensor_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
return _hid_sensor_power_state(attrb, false);
}
static int __maybe_unused hid_sensor_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
schedule_work(&attrb->work);
return 0;
}
static int __maybe_unused hid_sensor_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
return _hid_sensor_power_state(attrb, true);
}
const struct dev_pm_ops hid_sensor_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume)
SET_RUNTIME_PM_OPS(hid_sensor_suspend,
hid_sensor_runtime_resume, NULL)
};
EXPORT_SYMBOL(hid_sensor_pm_ops);
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
MODULE_DESCRIPTION("HID Sensor trigger processing");
MODULE_LICENSE("GPL");