forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
332 lines
9.0 KiB
332 lines
9.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* HID Sensors Driver |
|
* Copyright (c) 2012, Intel Corporation. |
|
*/ |
|
#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/triggered_buffer.h> |
|
#include <linux/iio/trigger_consumer.h> |
|
#include <linux/iio/buffer.h> |
|
#include <linux/iio/sysfs.h> |
|
#include "hid-sensor-trigger.h" |
|
|
|
static ssize_t _hid_sensor_set_report_latency(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
|
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); |
|
int integer, fract, ret; |
|
int latency; |
|
|
|
ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); |
|
if (ret) |
|
return ret; |
|
|
|
latency = integer * 1000 + fract / 1000; |
|
ret = hid_sensor_set_report_latency(attrb, latency); |
|
if (ret < 0) |
|
return len; |
|
|
|
attrb->latency_ms = hid_sensor_get_report_latency(attrb); |
|
|
|
return len; |
|
} |
|
|
|
static ssize_t _hid_sensor_get_report_latency(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
|
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); |
|
int latency; |
|
|
|
latency = hid_sensor_get_report_latency(attrb); |
|
if (latency < 0) |
|
return latency; |
|
|
|
return sprintf(buf, "%d.%06u\n", latency / 1000, (latency % 1000) * 1000); |
|
} |
|
|
|
static ssize_t _hid_sensor_get_fifo_state(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
|
struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); |
|
int latency; |
|
|
|
latency = hid_sensor_get_report_latency(attrb); |
|
if (latency < 0) |
|
return latency; |
|
|
|
return sprintf(buf, "%d\n", !!latency); |
|
} |
|
|
|
static IIO_DEVICE_ATTR(hwfifo_timeout, 0644, |
|
_hid_sensor_get_report_latency, |
|
_hid_sensor_set_report_latency, 0); |
|
static IIO_DEVICE_ATTR(hwfifo_enabled, 0444, |
|
_hid_sensor_get_fifo_state, NULL, 0); |
|
|
|
static const struct attribute *hid_sensor_fifo_attributes[] = { |
|
&iio_dev_attr_hwfifo_timeout.dev_attr.attr, |
|
&iio_dev_attr_hwfifo_enabled.dev_attr.attr, |
|
NULL, |
|
}; |
|
|
|
static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) |
|
{ |
|
int state_val; |
|
int report_val; |
|
s32 poll_value = 0; |
|
|
|
if (state) { |
|
if (sensor_hub_device_open(st->hsdev)) |
|
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); |
|
} |
|
|
|
pr_debug("HID_SENSOR %s set power_state %d report_state %d\n", |
|
st->pdev->name, state_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; |
|
|
|
if (atomic_add_unless(&st->runtime_pm_enable, 1, 1)) |
|
pm_runtime_enable(&st->pdev->dev); |
|
|
|
if (state) { |
|
atomic_inc(&st->user_requested_state); |
|
ret = pm_runtime_get_sync(&st->pdev->dev); |
|
} else { |
|
atomic_dec(&st->user_requested_state); |
|
pm_runtime_mark_last_busy(&st->pdev->dev); |
|
pm_runtime_use_autosuspend(&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); |
|
|
|
if (attrb->latency_ms > 0) |
|
hid_sensor_set_report_latency(attrb, attrb->latency_ms); |
|
|
|
if (atomic_read(&attrb->user_requested_state)) |
|
_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 iio_dev *indio_dev, |
|
struct hid_sensor_common *attrb) |
|
{ |
|
if (atomic_read(&attrb->runtime_pm_enable)) |
|
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); |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
} |
|
EXPORT_SYMBOL(hid_sensor_remove_trigger); |
|
|
|
static const struct iio_trigger_ops hid_sensor_trigger_ops = { |
|
.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) |
|
{ |
|
const struct attribute **fifo_attrs; |
|
int ret; |
|
struct iio_trigger *trig; |
|
|
|
if (hid_sensor_batch_mode_supported(attrb)) |
|
fifo_attrs = hid_sensor_fifo_attributes; |
|
else |
|
fifo_attrs = NULL; |
|
|
|
ret = iio_triggered_buffer_setup_ext(indio_dev, |
|
&iio_pollfunc_store_time, |
|
NULL, NULL, fifo_attrs); |
|
if (ret) { |
|
dev_err(&indio_dev->dev, "Triggered Buffer Setup Failed\n"); |
|
return ret; |
|
} |
|
|
|
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_triggered_buffer_cleanup; |
|
} |
|
|
|
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); |
|
/* Default to 3 seconds, but can be changed from sysfs */ |
|
pm_runtime_set_autosuspend_delay(&attrb->pdev->dev, |
|
3000); |
|
return ret; |
|
error_unreg_trigger: |
|
iio_trigger_unregister(trig); |
|
error_free_trig: |
|
iio_trigger_free(trig); |
|
error_triggered_buffer_cleanup: |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(hid_sensor_setup_trigger); |
|
|
|
static int __maybe_unused hid_sensor_suspend(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = dev_get_drvdata(dev); |
|
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 iio_dev *indio_dev = dev_get_drvdata(dev); |
|
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 iio_dev *indio_dev = dev_get_drvdata(dev); |
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("HID Sensor trigger processing"); |
|
MODULE_LICENSE("GPL");
|
|
|