1
2
3
4
5
6
7
8
9#include <sound/jack.h>
10#include <sound/soc.h>
11#include <linux/gpio.h>
12#include <linux/gpio/consumer.h>
13#include <linux/interrupt.h>
14#include <linux/workqueue.h>
15#include <linux/delay.h>
16#include <linux/export.h>
17#include <linux/suspend.h>
18#include <trace/events/asoc.h>
19
20struct jack_gpio_tbl {
21 int count;
22 struct snd_soc_jack *jack;
23 struct snd_soc_jack_gpio *gpios;
24};
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
41{
42 struct snd_soc_dapm_context *dapm;
43 struct snd_soc_jack_pin *pin;
44 unsigned int sync = 0;
45 int enable;
46
47 if (!jack)
48 return;
49 trace_snd_soc_jack_report(jack, mask, status);
50
51 dapm = &jack->card->dapm;
52
53 mutex_lock(&jack->mutex);
54
55 jack->status &= ~mask;
56 jack->status |= status & mask;
57
58 trace_snd_soc_jack_notify(jack, status);
59
60 list_for_each_entry(pin, &jack->pins, list) {
61 enable = pin->mask & jack->status;
62
63 if (pin->invert)
64 enable = !enable;
65
66 if (enable)
67 snd_soc_dapm_enable_pin(dapm, pin->pin);
68 else
69 snd_soc_dapm_disable_pin(dapm, pin->pin);
70
71
72 sync = 1;
73 }
74
75
76 blocking_notifier_call_chain(&jack->notifier, jack->status, jack);
77
78 if (sync)
79 snd_soc_dapm_sync(dapm);
80
81 snd_jack_report(jack->jack, jack->status);
82
83 mutex_unlock(&jack->mutex);
84}
85EXPORT_SYMBOL_GPL(snd_soc_jack_report);
86
87
88
89
90
91
92
93
94
95
96
97int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
98 struct snd_soc_jack_zone *zones)
99{
100 int i;
101
102 for (i = 0; i < count; i++) {
103 INIT_LIST_HEAD(&zones[i].list);
104 list_add(&(zones[i].list), &jack->jack_zones);
105 }
106 return 0;
107}
108EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);
109
110
111
112
113
114
115
116
117
118
119
120int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
121{
122 struct snd_soc_jack_zone *zone;
123
124 list_for_each_entry(zone, &jack->jack_zones, list) {
125 if (micbias_voltage >= zone->min_mv &&
126 micbias_voltage < zone->max_mv)
127 return zone->jack_type;
128 }
129 return 0;
130}
131EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);
132
133
134
135
136
137
138
139
140
141
142
143
144int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
145 struct snd_soc_jack_pin *pins)
146{
147 int i;
148
149 for (i = 0; i < count; i++) {
150 if (!pins[i].pin) {
151 dev_err(jack->card->dev, "ASoC: No name for pin %d\n",
152 i);
153 return -EINVAL;
154 }
155 if (!pins[i].mask) {
156 dev_err(jack->card->dev, "ASoC: No mask for pin %d"
157 " (%s)\n", i, pins[i].pin);
158 return -EINVAL;
159 }
160
161 INIT_LIST_HEAD(&pins[i].list);
162 list_add(&(pins[i].list), &jack->pins);
163 snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);
164 }
165
166
167
168
169
170 snd_soc_jack_report(jack, 0, 0);
171
172 return 0;
173}
174EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
175
176
177
178
179
180
181
182
183
184
185
186
187
188void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
189 struct notifier_block *nb)
190{
191 blocking_notifier_chain_register(&jack->notifier, nb);
192}
193EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
194
195
196
197
198
199
200
201
202
203void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
204 struct notifier_block *nb)
205{
206 blocking_notifier_chain_unregister(&jack->notifier, nb);
207}
208EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
209
210#ifdef CONFIG_GPIOLIB
211
212static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
213{
214 struct snd_soc_jack *jack = gpio->jack;
215 int enable;
216 int report;
217
218 enable = gpiod_get_value_cansleep(gpio->desc);
219 if (gpio->invert)
220 enable = !enable;
221
222 if (enable)
223 report = gpio->report;
224 else
225 report = 0;
226
227 if (gpio->jack_status_check)
228 report = gpio->jack_status_check(gpio->data);
229
230 snd_soc_jack_report(jack, report, gpio->report);
231}
232
233
234static irqreturn_t gpio_handler(int irq, void *data)
235{
236 struct snd_soc_jack_gpio *gpio = data;
237 struct device *dev = gpio->jack->card->dev;
238
239 trace_snd_soc_jack_irq(gpio->name);
240
241 if (device_may_wakeup(dev))
242 pm_wakeup_event(dev, gpio->debounce_time + 50);
243
244 queue_delayed_work(system_power_efficient_wq, &gpio->work,
245 msecs_to_jiffies(gpio->debounce_time));
246
247 return IRQ_HANDLED;
248}
249
250
251static void gpio_work(struct work_struct *work)
252{
253 struct snd_soc_jack_gpio *gpio;
254
255 gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
256 snd_soc_jack_gpio_detect(gpio);
257}
258
259static int snd_soc_jack_pm_notifier(struct notifier_block *nb,
260 unsigned long action, void *data)
261{
262 struct snd_soc_jack_gpio *gpio =
263 container_of(nb, struct snd_soc_jack_gpio, pm_notifier);
264
265 switch (action) {
266 case PM_POST_SUSPEND:
267 case PM_POST_HIBERNATION:
268 case PM_POST_RESTORE:
269
270
271
272
273 queue_delayed_work(system_power_efficient_wq, &gpio->work, 0);
274 break;
275 }
276
277 return NOTIFY_DONE;
278}
279
280static void jack_free_gpios(struct snd_soc_jack *jack, int count,
281 struct snd_soc_jack_gpio *gpios)
282{
283 int i;
284
285 for (i = 0; i < count; i++) {
286 gpiod_unexport(gpios[i].desc);
287 unregister_pm_notifier(&gpios[i].pm_notifier);
288 free_irq(gpiod_to_irq(gpios[i].desc), &gpios[i]);
289 cancel_delayed_work_sync(&gpios[i].work);
290 gpiod_put(gpios[i].desc);
291 gpios[i].jack = NULL;
292 }
293}
294
295static void jack_devres_free_gpios(struct device *dev, void *res)
296{
297 struct jack_gpio_tbl *tbl = res;
298
299 jack_free_gpios(tbl->jack, tbl->count, tbl->gpios);
300}
301
302
303
304
305
306
307
308
309
310
311
312int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
313 struct snd_soc_jack_gpio *gpios)
314{
315 int i, ret;
316 struct jack_gpio_tbl *tbl;
317
318 tbl = devres_alloc(jack_devres_free_gpios, sizeof(*tbl), GFP_KERNEL);
319 if (!tbl)
320 return -ENOMEM;
321 tbl->jack = jack;
322 tbl->count = count;
323 tbl->gpios = gpios;
324
325 for (i = 0; i < count; i++) {
326 if (!gpios[i].name) {
327 dev_err(jack->card->dev,
328 "ASoC: No name for gpio at index %d\n", i);
329 ret = -EINVAL;
330 goto undo;
331 }
332
333 if (gpios[i].desc) {
334
335 goto got_gpio;
336 } else if (gpios[i].gpiod_dev) {
337
338 gpios[i].desc = gpiod_get_index(gpios[i].gpiod_dev,
339 gpios[i].name,
340 gpios[i].idx, GPIOD_IN);
341 if (IS_ERR(gpios[i].desc)) {
342 ret = PTR_ERR(gpios[i].desc);
343 dev_err(gpios[i].gpiod_dev,
344 "ASoC: Cannot get gpio at index %d: %d",
345 i, ret);
346 goto undo;
347 }
348 } else {
349
350 if (!gpio_is_valid(gpios[i].gpio)) {
351 dev_err(jack->card->dev,
352 "ASoC: Invalid gpio %d\n",
353 gpios[i].gpio);
354 ret = -EINVAL;
355 goto undo;
356 }
357
358 ret = gpio_request_one(gpios[i].gpio, GPIOF_IN,
359 gpios[i].name);
360 if (ret)
361 goto undo;
362
363 gpios[i].desc = gpio_to_desc(gpios[i].gpio);
364 }
365got_gpio:
366 INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
367 gpios[i].jack = jack;
368
369 ret = request_any_context_irq(gpiod_to_irq(gpios[i].desc),
370 gpio_handler,
371 IRQF_TRIGGER_RISING |
372 IRQF_TRIGGER_FALLING,
373 gpios[i].name,
374 &gpios[i]);
375 if (ret < 0)
376 goto err;
377
378 if (gpios[i].wake) {
379 ret = irq_set_irq_wake(gpiod_to_irq(gpios[i].desc), 1);
380 if (ret != 0)
381 dev_err(jack->card->dev,
382 "ASoC: Failed to mark GPIO at index %d as wake source: %d\n",
383 i, ret);
384 }
385
386
387
388
389
390 gpios[i].pm_notifier.notifier_call = snd_soc_jack_pm_notifier;
391 register_pm_notifier(&gpios[i].pm_notifier);
392
393
394 gpiod_export(gpios[i].desc, false);
395
396
397 schedule_delayed_work(&gpios[i].work,
398 msecs_to_jiffies(gpios[i].debounce_time));
399 }
400
401 devres_add(jack->card->dev, tbl);
402 return 0;
403
404err:
405 gpio_free(gpios[i].gpio);
406undo:
407 jack_free_gpios(jack, i, gpios);
408 devres_free(tbl);
409
410 return ret;
411}
412EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);
413
414
415
416
417
418
419
420
421
422
423
424
425int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
426 struct snd_soc_jack *jack,
427 int count, struct snd_soc_jack_gpio *gpios)
428{
429 int i;
430
431 for (i = 0; i < count; i++)
432 gpios[i].gpiod_dev = gpiod_dev;
433
434 return snd_soc_jack_add_gpios(jack, count, gpios);
435}
436EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpiods);
437
438
439
440
441
442
443
444
445
446
447void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
448 struct snd_soc_jack_gpio *gpios)
449{
450 jack_free_gpios(jack, count, gpios);
451 devres_destroy(jack->card->dev, jack_devres_free_gpios, NULL, NULL);
452}
453EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
454#endif
455