Commit | Line | Data |
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73c6768b | 1 | /* |
2 | * HID Sensors Driver | |
3 | * Copyright (c) 2012, Intel Corporation. | |
4 | * | |
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. | |
8 | * | |
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 | |
12 | * more details. | |
13 | * | |
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. | |
17 | * | |
18 | */ | |
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> | |
2b89635e | 25 | #include <linux/delay.h> |
73c6768b | 26 | #include <linux/hid-sensor-hub.h> |
27 | #include <linux/iio/iio.h> | |
28 | #include <linux/iio/trigger.h> | |
29 | #include <linux/iio/sysfs.h> | |
73c6768b | 30 | #include "hid-sensor-trigger.h" |
31 | ||
2b89635e | 32 | static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) |
73c6768b | 33 | { |
73c6768b | 34 | int state_val; |
751d17e2 | 35 | int report_val; |
2b89635e | 36 | s32 poll_value = 0; |
73c6768b | 37 | |
7d3c192d | 38 | if (state) { |
1e25aa96 SP |
39 | if (!atomic_read(&st->user_requested_state)) |
40 | return 0; | |
7d3c192d SP |
41 | if (sensor_hub_device_open(st->hsdev)) |
42 | return -EIO; | |
56ff6be6 SP |
43 | |
44 | atomic_inc(&st->data_ready); | |
45 | ||
1a214ae5 SP |
46 | state_val = hid_sensor_get_usage_index(st->hsdev, |
47 | st->power_state.report_id, | |
48 | st->power_state.index, | |
49 | HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM); | |
50 | report_val = hid_sensor_get_usage_index(st->hsdev, | |
51 | st->report_state.report_id, | |
52 | st->report_state.index, | |
53 | HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM); | |
2b89635e SP |
54 | |
55 | poll_value = hid_sensor_read_poll_value(st); | |
751d17e2 | 56 | } else { |
1e25aa96 SP |
57 | int val; |
58 | ||
59 | val = atomic_dec_if_positive(&st->data_ready); | |
60 | if (val < 0) | |
56ff6be6 | 61 | return 0; |
1e25aa96 | 62 | |
7d3c192d | 63 | sensor_hub_device_close(st->hsdev); |
1a214ae5 SP |
64 | state_val = hid_sensor_get_usage_index(st->hsdev, |
65 | st->power_state.report_id, | |
66 | st->power_state.index, | |
67 | HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM); | |
68 | report_val = hid_sensor_get_usage_index(st->hsdev, | |
69 | st->report_state.report_id, | |
70 | st->report_state.index, | |
71 | HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM); | |
751d17e2 | 72 | } |
1a214ae5 SP |
73 | |
74 | if (state_val >= 0) { | |
75 | state_val += st->power_state.logical_minimum; | |
76 | sensor_hub_set_feature(st->hsdev, st->power_state.report_id, | |
3950e033 SP |
77 | st->power_state.index, sizeof(state_val), |
78 | &state_val); | |
1a214ae5 | 79 | } |
73c6768b | 80 | |
1a214ae5 SP |
81 | if (report_val >= 0) { |
82 | report_val += st->report_state.logical_minimum; | |
83 | sensor_hub_set_feature(st->hsdev, st->report_state.report_id, | |
3950e033 SP |
84 | st->report_state.index, |
85 | sizeof(report_val), | |
86 | &report_val); | |
1a214ae5 | 87 | } |
73c6768b | 88 | |
c0a36f08 | 89 | sensor_hub_get_feature(st->hsdev, st->power_state.report_id, |
6adc83fc SP |
90 | st->power_state.index, |
91 | sizeof(state_val), &state_val); | |
2b89635e SP |
92 | if (state && poll_value) |
93 | msleep_interruptible(poll_value * 2); | |
94 | ||
73c6768b | 95 | return 0; |
96 | } | |
56ff6be6 SP |
97 | EXPORT_SYMBOL(hid_sensor_power_state); |
98 | ||
2b89635e SP |
99 | int hid_sensor_power_state(struct hid_sensor_common *st, bool state) |
100 | { | |
1e25aa96 | 101 | |
2b89635e SP |
102 | #ifdef CONFIG_PM |
103 | int ret; | |
104 | ||
1e25aa96 | 105 | atomic_set(&st->user_requested_state, state); |
2b89635e SP |
106 | if (state) |
107 | ret = pm_runtime_get_sync(&st->pdev->dev); | |
108 | else { | |
109 | pm_runtime_mark_last_busy(&st->pdev->dev); | |
110 | ret = pm_runtime_put_autosuspend(&st->pdev->dev); | |
111 | } | |
112 | if (ret < 0) { | |
113 | if (state) | |
114 | pm_runtime_put_noidle(&st->pdev->dev); | |
115 | return ret; | |
116 | } | |
117 | ||
d23057e0 | 118 | return 0; |
2b89635e | 119 | #else |
1e25aa96 | 120 | atomic_set(&st->user_requested_state, state); |
2b89635e SP |
121 | return _hid_sensor_power_state(st, state); |
122 | #endif | |
123 | } | |
124 | ||
7f6cf741 SP |
125 | static void hid_sensor_set_power_work(struct work_struct *work) |
126 | { | |
127 | struct hid_sensor_common *attrb = container_of(work, | |
128 | struct hid_sensor_common, | |
129 | work); | |
130 | _hid_sensor_power_state(attrb, true); | |
131 | } | |
132 | ||
56ff6be6 SP |
133 | static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, |
134 | bool state) | |
135 | { | |
136 | return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state); | |
137 | } | |
73c6768b | 138 | |
ec7f68e0 | 139 | void hid_sensor_remove_trigger(struct hid_sensor_common *attrb) |
73c6768b | 140 | { |
7f6cf741 | 141 | cancel_work_sync(&attrb->work); |
ec7f68e0 SP |
142 | iio_trigger_unregister(attrb->trigger); |
143 | iio_trigger_free(attrb->trigger); | |
73c6768b | 144 | } |
145 | EXPORT_SYMBOL(hid_sensor_remove_trigger); | |
146 | ||
147 | static const struct iio_trigger_ops hid_sensor_trigger_ops = { | |
148 | .owner = THIS_MODULE, | |
149 | .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state, | |
150 | }; | |
151 | ||
152 | int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, | |
e07c6d17 | 153 | struct hid_sensor_common *attrb) |
73c6768b | 154 | { |
155 | int ret; | |
156 | struct iio_trigger *trig; | |
157 | ||
158 | trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id); | |
159 | if (trig == NULL) { | |
160 | dev_err(&indio_dev->dev, "Trigger Allocate Failed\n"); | |
161 | ret = -ENOMEM; | |
162 | goto error_ret; | |
163 | } | |
164 | ||
165 | trig->dev.parent = indio_dev->dev.parent; | |
1e9663c6 | 166 | iio_trigger_set_drvdata(trig, attrb); |
73c6768b | 167 | trig->ops = &hid_sensor_trigger_ops; |
168 | ret = iio_trigger_register(trig); | |
169 | ||
170 | if (ret) { | |
171 | dev_err(&indio_dev->dev, "Trigger Register Failed\n"); | |
172 | goto error_free_trig; | |
173 | } | |
55a6f9dd SP |
174 | attrb->trigger = trig; |
175 | indio_dev->trig = iio_trigger_get(trig); | |
73c6768b | 176 | |
2b89635e SP |
177 | ret = pm_runtime_set_active(&indio_dev->dev); |
178 | if (ret) | |
179 | goto error_unreg_trigger; | |
73c6768b | 180 | |
2b89635e | 181 | iio_device_set_drvdata(indio_dev, attrb); |
7f6cf741 SP |
182 | |
183 | INIT_WORK(&attrb->work, hid_sensor_set_power_work); | |
184 | ||
2b89635e SP |
185 | pm_suspend_ignore_children(&attrb->pdev->dev, true); |
186 | pm_runtime_enable(&attrb->pdev->dev); | |
187 | /* Default to 3 seconds, but can be changed from sysfs */ | |
188 | pm_runtime_set_autosuspend_delay(&attrb->pdev->dev, | |
189 | 3000); | |
190 | pm_runtime_use_autosuspend(&attrb->pdev->dev); | |
191 | ||
192 | return ret; | |
193 | error_unreg_trigger: | |
194 | iio_trigger_unregister(trig); | |
73c6768b | 195 | error_free_trig: |
196 | iio_trigger_free(trig); | |
197 | error_ret: | |
198 | return ret; | |
199 | } | |
200 | EXPORT_SYMBOL(hid_sensor_setup_trigger); | |
201 | ||
2b89635e SP |
202 | #ifdef CONFIG_PM |
203 | static int hid_sensor_suspend(struct device *dev) | |
204 | { | |
205 | struct platform_device *pdev = to_platform_device(dev); | |
206 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); | |
207 | struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); | |
208 | ||
209 | return _hid_sensor_power_state(attrb, false); | |
210 | } | |
211 | ||
212 | static int hid_sensor_resume(struct device *dev) | |
213 | { | |
214 | struct platform_device *pdev = to_platform_device(dev); | |
215 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); | |
216 | struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); | |
7f6cf741 SP |
217 | schedule_work(&attrb->work); |
218 | return 0; | |
219 | } | |
2b89635e | 220 | |
7f6cf741 SP |
221 | static int hid_sensor_runtime_resume(struct device *dev) |
222 | { | |
223 | struct platform_device *pdev = to_platform_device(dev); | |
224 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); | |
225 | struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); | |
2b89635e SP |
226 | return _hid_sensor_power_state(attrb, true); |
227 | } | |
228 | ||
229 | #endif | |
230 | ||
231 | const struct dev_pm_ops hid_sensor_pm_ops = { | |
232 | SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume) | |
233 | SET_RUNTIME_PM_OPS(hid_sensor_suspend, | |
7f6cf741 | 234 | hid_sensor_runtime_resume, NULL) |
2b89635e SP |
235 | }; |
236 | EXPORT_SYMBOL(hid_sensor_pm_ops); | |
237 | ||
73c6768b | 238 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); |
239 | MODULE_DESCRIPTION("HID Sensor trigger processing"); | |
240 | MODULE_LICENSE("GPL"); |