3 * Copyright (c) 2012, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/slab.h>
25 #include <linux/hid-sensor-hub.h>
26 #include <linux/iio/iio.h>
27 #include <linux/iio/trigger.h>
28 #include <linux/iio/sysfs.h>
29 #include "hid-sensor-trigger.h"
31 int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
37 if (sensor_hub_device_open(st->hsdev))
40 atomic_inc(&st->data_ready);
42 state_val = hid_sensor_get_usage_index(st->hsdev,
43 st->power_state.report_id,
44 st->power_state.index,
45 HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM);
46 report_val = hid_sensor_get_usage_index(st->hsdev,
47 st->report_state.report_id,
48 st->report_state.index,
49 HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM);
51 if (!atomic_dec_and_test(&st->data_ready))
53 sensor_hub_device_close(st->hsdev);
54 state_val = hid_sensor_get_usage_index(st->hsdev,
55 st->power_state.report_id,
56 st->power_state.index,
57 HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM);
58 report_val = hid_sensor_get_usage_index(st->hsdev,
59 st->report_state.report_id,
60 st->report_state.index,
61 HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM);
65 state_val += st->power_state.logical_minimum;
66 sensor_hub_set_feature(st->hsdev, st->power_state.report_id,
67 st->power_state.index,
71 if (report_val >= 0) {
72 report_val += st->report_state.logical_minimum;
73 sensor_hub_set_feature(st->hsdev, st->report_state.report_id,
74 st->report_state.index,
78 sensor_hub_get_feature(st->hsdev, st->power_state.report_id,
79 st->power_state.index,
83 EXPORT_SYMBOL(hid_sensor_power_state);
85 static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
88 return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state);
91 void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
93 iio_trigger_unregister(attrb->trigger);
94 iio_trigger_free(attrb->trigger);
96 EXPORT_SYMBOL(hid_sensor_remove_trigger);
98 static const struct iio_trigger_ops hid_sensor_trigger_ops = {
100 .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state,
103 int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
104 struct hid_sensor_common *attrb)
107 struct iio_trigger *trig;
109 trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id);
111 dev_err(&indio_dev->dev, "Trigger Allocate Failed\n");
116 trig->dev.parent = indio_dev->dev.parent;
117 iio_trigger_set_drvdata(trig, attrb);
118 trig->ops = &hid_sensor_trigger_ops;
119 ret = iio_trigger_register(trig);
122 dev_err(&indio_dev->dev, "Trigger Register Failed\n");
123 goto error_free_trig;
125 indio_dev->trig = attrb->trigger = trig;
130 iio_trigger_free(trig);
134 EXPORT_SYMBOL(hid_sensor_setup_trigger);
136 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
137 MODULE_DESCRIPTION("HID Sensor trigger processing");
138 MODULE_LICENSE("GPL");