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14#include <sound/jack.h>
15#include <sound/soc.h>
16#include <linux/gpio.h>
17#include <linux/gpio/consumer.h>
18#include <linux/interrupt.h>
19#include <linux/workqueue.h>
20#include <linux/delay.h>
21#include <linux/export.h>
22#include <linux/suspend.h>
23#include <trace/events/asoc.h>
24
25struct jack_gpio_tbl {
26 int count;
27 struct snd_soc_jack *jack;
28 struct snd_soc_jack_gpio *gpios;
29};
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39int snd_soc_codec_set_jack(struct snd_soc_codec *codec,
40 struct snd_soc_jack *jack, void *data)
41{
42 if (codec->driver->set_jack)
43 return codec->driver->set_jack(codec, jack, data);
44 else
45 return -ENOTSUPP;
46}
47EXPORT_SYMBOL_GPL(snd_soc_codec_set_jack);
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56
57int snd_soc_component_set_jack(struct snd_soc_component *component,
58 struct snd_soc_jack *jack, void *data)
59{
60
61 if (component->set_jack)
62 return component->set_jack(component, jack, data);
63
64 if (component->driver->set_jack)
65 return component->driver->set_jack(component, jack, data);
66
67 return -ENOTSUPP;
68}
69EXPORT_SYMBOL_GPL(snd_soc_component_set_jack);
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86int snd_soc_card_jack_new(struct snd_soc_card *card, const char *id, int type,
87 struct snd_soc_jack *jack, struct snd_soc_jack_pin *pins,
88 unsigned int num_pins)
89{
90 int ret;
91
92 mutex_init(&jack->mutex);
93 jack->card = card;
94 INIT_LIST_HEAD(&jack->pins);
95 INIT_LIST_HEAD(&jack->jack_zones);
96 BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
97
98 ret = snd_jack_new(card->snd_card, id, type, &jack->jack, false, false);
99 if (ret)
100 return ret;
101
102 if (num_pins)
103 return snd_soc_jack_add_pins(jack, num_pins, pins);
104
105 return 0;
106}
107EXPORT_SYMBOL_GPL(snd_soc_card_jack_new);
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122
123void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
124{
125 struct snd_soc_dapm_context *dapm;
126 struct snd_soc_jack_pin *pin;
127 unsigned int sync = 0;
128 int enable;
129
130 trace_snd_soc_jack_report(jack, mask, status);
131
132 if (!jack)
133 return;
134
135 dapm = &jack->card->dapm;
136
137 mutex_lock(&jack->mutex);
138
139 jack->status &= ~mask;
140 jack->status |= status & mask;
141
142 trace_snd_soc_jack_notify(jack, status);
143
144 list_for_each_entry(pin, &jack->pins, list) {
145 enable = pin->mask & jack->status;
146
147 if (pin->invert)
148 enable = !enable;
149
150 if (enable)
151 snd_soc_dapm_enable_pin(dapm, pin->pin);
152 else
153 snd_soc_dapm_disable_pin(dapm, pin->pin);
154
155
156 sync = 1;
157 }
158
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160 blocking_notifier_call_chain(&jack->notifier, jack->status, jack);
161
162 if (sync)
163 snd_soc_dapm_sync(dapm);
164
165 snd_jack_report(jack->jack, jack->status);
166
167 mutex_unlock(&jack->mutex);
168}
169EXPORT_SYMBOL_GPL(snd_soc_jack_report);
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180
181int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
182 struct snd_soc_jack_zone *zones)
183{
184 int i;
185
186 for (i = 0; i < count; i++) {
187 INIT_LIST_HEAD(&zones[i].list);
188 list_add(&(zones[i].list), &jack->jack_zones);
189 }
190 return 0;
191}
192EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);
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204int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
205{
206 struct snd_soc_jack_zone *zone;
207
208 list_for_each_entry(zone, &jack->jack_zones, list) {
209 if (micbias_voltage >= zone->min_mv &&
210 micbias_voltage < zone->max_mv)
211 return zone->jack_type;
212 }
213 return 0;
214}
215EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);
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227
228int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
229 struct snd_soc_jack_pin *pins)
230{
231 int i;
232
233 for (i = 0; i < count; i++) {
234 if (!pins[i].pin) {
235 dev_err(jack->card->dev, "ASoC: No name for pin %d\n",
236 i);
237 return -EINVAL;
238 }
239 if (!pins[i].mask) {
240 dev_err(jack->card->dev, "ASoC: No mask for pin %d"
241 " (%s)\n", i, pins[i].pin);
242 return -EINVAL;
243 }
244
245 INIT_LIST_HEAD(&pins[i].list);
246 list_add(&(pins[i].list), &jack->pins);
247 snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);
248 }
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254 snd_soc_jack_report(jack, 0, 0);
255
256 return 0;
257}
258EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
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272void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
273 struct notifier_block *nb)
274{
275 blocking_notifier_chain_register(&jack->notifier, nb);
276}
277EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
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287void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
288 struct notifier_block *nb)
289{
290 blocking_notifier_chain_unregister(&jack->notifier, nb);
291}
292EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
293
294#ifdef CONFIG_GPIOLIB
295
296static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
297{
298 struct snd_soc_jack *jack = gpio->jack;
299 int enable;
300 int report;
301
302 enable = gpiod_get_value_cansleep(gpio->desc);
303 if (gpio->invert)
304 enable = !enable;
305
306 if (enable)
307 report = gpio->report;
308 else
309 report = 0;
310
311 if (gpio->jack_status_check)
312 report = gpio->jack_status_check(gpio->data);
313
314 snd_soc_jack_report(jack, report, gpio->report);
315}
316
317
318static irqreturn_t gpio_handler(int irq, void *data)
319{
320 struct snd_soc_jack_gpio *gpio = data;
321 struct device *dev = gpio->jack->card->dev;
322
323 trace_snd_soc_jack_irq(gpio->name);
324
325 if (device_may_wakeup(dev))
326 pm_wakeup_event(dev, gpio->debounce_time + 50);
327
328 queue_delayed_work(system_power_efficient_wq, &gpio->work,
329 msecs_to_jiffies(gpio->debounce_time));
330
331 return IRQ_HANDLED;
332}
333
334
335static void gpio_work(struct work_struct *work)
336{
337 struct snd_soc_jack_gpio *gpio;
338
339 gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
340 snd_soc_jack_gpio_detect(gpio);
341}
342
343static int snd_soc_jack_pm_notifier(struct notifier_block *nb,
344 unsigned long action, void *data)
345{
346 struct snd_soc_jack_gpio *gpio =
347 container_of(nb, struct snd_soc_jack_gpio, pm_notifier);
348
349 switch (action) {
350 case PM_POST_SUSPEND:
351 case PM_POST_HIBERNATION:
352 case PM_POST_RESTORE:
353
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357 queue_delayed_work(system_power_efficient_wq, &gpio->work, 0);
358 break;
359 }
360
361 return NOTIFY_DONE;
362}
363
364static void jack_free_gpios(struct snd_soc_jack *jack, int count,
365 struct snd_soc_jack_gpio *gpios)
366{
367 int i;
368
369 for (i = 0; i < count; i++) {
370 gpiod_unexport(gpios[i].desc);
371 unregister_pm_notifier(&gpios[i].pm_notifier);
372 free_irq(gpiod_to_irq(gpios[i].desc), &gpios[i]);
373 cancel_delayed_work_sync(&gpios[i].work);
374 gpiod_put(gpios[i].desc);
375 gpios[i].jack = NULL;
376 }
377}
378
379static void jack_devres_free_gpios(struct device *dev, void *res)
380{
381 struct jack_gpio_tbl *tbl = res;
382
383 jack_free_gpios(tbl->jack, tbl->count, tbl->gpios);
384}
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396int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
397 struct snd_soc_jack_gpio *gpios)
398{
399 int i, ret;
400 struct jack_gpio_tbl *tbl;
401
402 tbl = devres_alloc(jack_devres_free_gpios, sizeof(*tbl), GFP_KERNEL);
403 if (!tbl)
404 return -ENOMEM;
405 tbl->jack = jack;
406 tbl->count = count;
407 tbl->gpios = gpios;
408
409 for (i = 0; i < count; i++) {
410 if (!gpios[i].name) {
411 dev_err(jack->card->dev,
412 "ASoC: No name for gpio at index %d\n", i);
413 ret = -EINVAL;
414 goto undo;
415 }
416
417 if (gpios[i].desc) {
418
419 goto got_gpio;
420 } else if (gpios[i].gpiod_dev) {
421
422 gpios[i].desc = gpiod_get_index(gpios[i].gpiod_dev,
423 gpios[i].name,
424 gpios[i].idx, GPIOD_IN);
425 if (IS_ERR(gpios[i].desc)) {
426 ret = PTR_ERR(gpios[i].desc);
427 dev_err(gpios[i].gpiod_dev,
428 "ASoC: Cannot get gpio at index %d: %d",
429 i, ret);
430 goto undo;
431 }
432 } else {
433
434 if (!gpio_is_valid(gpios[i].gpio)) {
435 dev_err(jack->card->dev,
436 "ASoC: Invalid gpio %d\n",
437 gpios[i].gpio);
438 ret = -EINVAL;
439 goto undo;
440 }
441
442 ret = gpio_request_one(gpios[i].gpio, GPIOF_IN,
443 gpios[i].name);
444 if (ret)
445 goto undo;
446
447 gpios[i].desc = gpio_to_desc(gpios[i].gpio);
448 }
449got_gpio:
450 INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
451 gpios[i].jack = jack;
452
453 ret = request_any_context_irq(gpiod_to_irq(gpios[i].desc),
454 gpio_handler,
455 IRQF_TRIGGER_RISING |
456 IRQF_TRIGGER_FALLING,
457 gpios[i].name,
458 &gpios[i]);
459 if (ret < 0)
460 goto err;
461
462 if (gpios[i].wake) {
463 ret = irq_set_irq_wake(gpiod_to_irq(gpios[i].desc), 1);
464 if (ret != 0)
465 dev_err(jack->card->dev,
466 "ASoC: Failed to mark GPIO at index %d as wake source: %d\n",
467 i, ret);
468 }
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473
474 gpios[i].pm_notifier.notifier_call = snd_soc_jack_pm_notifier;
475 register_pm_notifier(&gpios[i].pm_notifier);
476
477
478 gpiod_export(gpios[i].desc, false);
479
480
481 schedule_delayed_work(&gpios[i].work,
482 msecs_to_jiffies(gpios[i].debounce_time));
483 }
484
485 devres_add(jack->card->dev, tbl);
486 return 0;
487
488err:
489 gpio_free(gpios[i].gpio);
490undo:
491 jack_free_gpios(jack, i, gpios);
492 devres_free(tbl);
493
494 return ret;
495}
496EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);
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509int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
510 struct snd_soc_jack *jack,
511 int count, struct snd_soc_jack_gpio *gpios)
512{
513 int i;
514
515 for (i = 0; i < count; i++)
516 gpios[i].gpiod_dev = gpiod_dev;
517
518 return snd_soc_jack_add_gpios(jack, count, gpios);
519}
520EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpiods);
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531void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
532 struct snd_soc_jack_gpio *gpios)
533{
534 jack_free_gpios(jack, count, gpios);
535 devres_destroy(jack->card->dev, jack_devres_free_gpios, NULL, NULL);
536}
537EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
538#endif
539