This source file includes following definitions.
- _hid_sensor_set_report_latency
- _hid_sensor_get_report_latency
- _hid_sensor_get_fifo_state
- hid_sensor_setup_batch_mode
- _hid_sensor_power_state
- hid_sensor_power_state
- hid_sensor_set_power_work
- hid_sensor_data_rdy_trigger_set_state
- hid_sensor_remove_trigger
- hid_sensor_setup_trigger
- hid_sensor_suspend
- hid_sensor_resume
- hid_sensor_runtime_resume
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5
6 #include <linux/device.h>
7 #include <linux/platform_device.h>
8 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/slab.h>
12 #include <linux/delay.h>
13 #include <linux/hid-sensor-hub.h>
14 #include <linux/iio/iio.h>
15 #include <linux/iio/trigger.h>
16 #include <linux/iio/buffer.h>
17 #include <linux/iio/sysfs.h>
18 #include "hid-sensor-trigger.h"
19
20 static ssize_t _hid_sensor_set_report_latency(struct device *dev,
21 struct device_attribute *attr,
22 const char *buf, size_t len)
23 {
24 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
25 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
26 int integer, fract, ret;
27 int latency;
28
29 ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract);
30 if (ret)
31 return ret;
32
33 latency = integer * 1000 + fract / 1000;
34 ret = hid_sensor_set_report_latency(attrb, latency);
35 if (ret < 0)
36 return len;
37
38 attrb->latency_ms = hid_sensor_get_report_latency(attrb);
39
40 return len;
41 }
42
43 static ssize_t _hid_sensor_get_report_latency(struct device *dev,
44 struct device_attribute *attr,
45 char *buf)
46 {
47 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
48 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
49 int latency;
50
51 latency = hid_sensor_get_report_latency(attrb);
52 if (latency < 0)
53 return latency;
54
55 return sprintf(buf, "%d.%06u\n", latency / 1000, (latency % 1000) * 1000);
56 }
57
58 static ssize_t _hid_sensor_get_fifo_state(struct device *dev,
59 struct device_attribute *attr,
60 char *buf)
61 {
62 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
63 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
64 int latency;
65
66 latency = hid_sensor_get_report_latency(attrb);
67 if (latency < 0)
68 return latency;
69
70 return sprintf(buf, "%d\n", !!latency);
71 }
72
73 static IIO_DEVICE_ATTR(hwfifo_timeout, 0644,
74 _hid_sensor_get_report_latency,
75 _hid_sensor_set_report_latency, 0);
76 static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
77 _hid_sensor_get_fifo_state, NULL, 0);
78
79 static const struct attribute *hid_sensor_fifo_attributes[] = {
80 &iio_dev_attr_hwfifo_timeout.dev_attr.attr,
81 &iio_dev_attr_hwfifo_enabled.dev_attr.attr,
82 NULL,
83 };
84
85 static void hid_sensor_setup_batch_mode(struct iio_dev *indio_dev,
86 struct hid_sensor_common *st)
87 {
88 if (!hid_sensor_batch_mode_supported(st))
89 return;
90
91 iio_buffer_set_attrs(indio_dev->buffer, hid_sensor_fifo_attributes);
92 }
93
94 static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state)
95 {
96 int state_val;
97 int report_val;
98 s32 poll_value = 0;
99
100 if (state) {
101 if (sensor_hub_device_open(st->hsdev))
102 return -EIO;
103
104 atomic_inc(&st->data_ready);
105
106 state_val = hid_sensor_get_usage_index(st->hsdev,
107 st->power_state.report_id,
108 st->power_state.index,
109 HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM);
110 report_val = hid_sensor_get_usage_index(st->hsdev,
111 st->report_state.report_id,
112 st->report_state.index,
113 HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM);
114
115 poll_value = hid_sensor_read_poll_value(st);
116 } else {
117 int val;
118
119 val = atomic_dec_if_positive(&st->data_ready);
120 if (val < 0)
121 return 0;
122
123 sensor_hub_device_close(st->hsdev);
124 state_val = hid_sensor_get_usage_index(st->hsdev,
125 st->power_state.report_id,
126 st->power_state.index,
127 HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM);
128 report_val = hid_sensor_get_usage_index(st->hsdev,
129 st->report_state.report_id,
130 st->report_state.index,
131 HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM);
132 }
133
134 if (state_val >= 0) {
135 state_val += st->power_state.logical_minimum;
136 sensor_hub_set_feature(st->hsdev, st->power_state.report_id,
137 st->power_state.index, sizeof(state_val),
138 &state_val);
139 }
140
141 if (report_val >= 0) {
142 report_val += st->report_state.logical_minimum;
143 sensor_hub_set_feature(st->hsdev, st->report_state.report_id,
144 st->report_state.index,
145 sizeof(report_val),
146 &report_val);
147 }
148
149 pr_debug("HID_SENSOR %s set power_state %d report_state %d\n",
150 st->pdev->name, state_val, report_val);
151
152 sensor_hub_get_feature(st->hsdev, st->power_state.report_id,
153 st->power_state.index,
154 sizeof(state_val), &state_val);
155 if (state && poll_value)
156 msleep_interruptible(poll_value * 2);
157
158 return 0;
159 }
160 EXPORT_SYMBOL(hid_sensor_power_state);
161
162 int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
163 {
164
165 #ifdef CONFIG_PM
166 int ret;
167
168 if (atomic_add_unless(&st->runtime_pm_enable, 1, 1))
169 pm_runtime_enable(&st->pdev->dev);
170
171 if (state) {
172 atomic_inc(&st->user_requested_state);
173 ret = pm_runtime_get_sync(&st->pdev->dev);
174 } else {
175 atomic_dec(&st->user_requested_state);
176 pm_runtime_mark_last_busy(&st->pdev->dev);
177 pm_runtime_use_autosuspend(&st->pdev->dev);
178 ret = pm_runtime_put_autosuspend(&st->pdev->dev);
179 }
180 if (ret < 0) {
181 if (state)
182 pm_runtime_put_noidle(&st->pdev->dev);
183 return ret;
184 }
185
186 return 0;
187 #else
188 atomic_set(&st->user_requested_state, state);
189 return _hid_sensor_power_state(st, state);
190 #endif
191 }
192
193 static void hid_sensor_set_power_work(struct work_struct *work)
194 {
195 struct hid_sensor_common *attrb = container_of(work,
196 struct hid_sensor_common,
197 work);
198
199 if (attrb->poll_interval >= 0)
200 sensor_hub_set_feature(attrb->hsdev, attrb->poll.report_id,
201 attrb->poll.index,
202 sizeof(attrb->poll_interval),
203 &attrb->poll_interval);
204
205 if (attrb->raw_hystersis >= 0)
206 sensor_hub_set_feature(attrb->hsdev,
207 attrb->sensitivity.report_id,
208 attrb->sensitivity.index,
209 sizeof(attrb->raw_hystersis),
210 &attrb->raw_hystersis);
211
212 if (attrb->latency_ms > 0)
213 hid_sensor_set_report_latency(attrb, attrb->latency_ms);
214
215 if (atomic_read(&attrb->user_requested_state))
216 _hid_sensor_power_state(attrb, true);
217 }
218
219 static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
220 bool state)
221 {
222 return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state);
223 }
224
225 void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
226 {
227 if (atomic_read(&attrb->runtime_pm_enable))
228 pm_runtime_disable(&attrb->pdev->dev);
229
230 pm_runtime_set_suspended(&attrb->pdev->dev);
231 pm_runtime_put_noidle(&attrb->pdev->dev);
232
233 cancel_work_sync(&attrb->work);
234 iio_trigger_unregister(attrb->trigger);
235 iio_trigger_free(attrb->trigger);
236 }
237 EXPORT_SYMBOL(hid_sensor_remove_trigger);
238
239 static const struct iio_trigger_ops hid_sensor_trigger_ops = {
240 .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state,
241 };
242
243 int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
244 struct hid_sensor_common *attrb)
245 {
246 int ret;
247 struct iio_trigger *trig;
248
249 trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id);
250 if (trig == NULL) {
251 dev_err(&indio_dev->dev, "Trigger Allocate Failed\n");
252 ret = -ENOMEM;
253 goto error_ret;
254 }
255
256 trig->dev.parent = indio_dev->dev.parent;
257 iio_trigger_set_drvdata(trig, attrb);
258 trig->ops = &hid_sensor_trigger_ops;
259 ret = iio_trigger_register(trig);
260
261 if (ret) {
262 dev_err(&indio_dev->dev, "Trigger Register Failed\n");
263 goto error_free_trig;
264 }
265 attrb->trigger = trig;
266 indio_dev->trig = iio_trigger_get(trig);
267
268 hid_sensor_setup_batch_mode(indio_dev, attrb);
269
270 ret = pm_runtime_set_active(&indio_dev->dev);
271 if (ret)
272 goto error_unreg_trigger;
273
274 iio_device_set_drvdata(indio_dev, attrb);
275
276 INIT_WORK(&attrb->work, hid_sensor_set_power_work);
277
278 pm_suspend_ignore_children(&attrb->pdev->dev, true);
279
280 pm_runtime_set_autosuspend_delay(&attrb->pdev->dev,
281 3000);
282 return ret;
283 error_unreg_trigger:
284 iio_trigger_unregister(trig);
285 error_free_trig:
286 iio_trigger_free(trig);
287 error_ret:
288 return ret;
289 }
290 EXPORT_SYMBOL(hid_sensor_setup_trigger);
291
292 static int __maybe_unused hid_sensor_suspend(struct device *dev)
293 {
294 struct iio_dev *indio_dev = dev_get_drvdata(dev);
295 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
296
297 return _hid_sensor_power_state(attrb, false);
298 }
299
300 static int __maybe_unused hid_sensor_resume(struct device *dev)
301 {
302 struct iio_dev *indio_dev = dev_get_drvdata(dev);
303 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
304 schedule_work(&attrb->work);
305 return 0;
306 }
307
308 static int __maybe_unused hid_sensor_runtime_resume(struct device *dev)
309 {
310 struct iio_dev *indio_dev = dev_get_drvdata(dev);
311 struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
312 return _hid_sensor_power_state(attrb, true);
313 }
314
315 const struct dev_pm_ops hid_sensor_pm_ops = {
316 SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume)
317 SET_RUNTIME_PM_OPS(hid_sensor_suspend,
318 hid_sensor_runtime_resume, NULL)
319 };
320 EXPORT_SYMBOL(hid_sensor_pm_ops);
321
322 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
323 MODULE_DESCRIPTION("HID Sensor trigger processing");
324 MODULE_LICENSE("GPL");