1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-jack.c  --  ALSA SoC jack handling
11 #include <linux/gpio.h>
12 #include <linux/gpio/consumer.h>
21  * snd_soc_jack_report - Report the current status for a jack
44 	dapm = &jack->card->dapm;  in snd_soc_jack_report()
46 	mutex_lock(&jack->mutex);  in snd_soc_jack_report()
48 	jack->status &= ~mask;  in snd_soc_jack_report()
49 	jack->status |= status & mask;  in snd_soc_jack_report()
53 	list_for_each_entry(pin, &jack->pins, list) {  in snd_soc_jack_report()
54 		int enable = pin->mask & jack->status;  in snd_soc_jack_report()  local
56 		if (pin->invert)  in snd_soc_jack_report()
57 			enable = !enable;  in snd_soc_jack_report()
59 		if (enable)  in snd_soc_jack_report()
60 			snd_soc_dapm_enable_pin(dapm, pin->pin);  in snd_soc_jack_report()
62 			snd_soc_dapm_disable_pin(dapm, pin->pin);  in snd_soc_jack_report()
69 	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);  in snd_soc_jack_report()
74 	snd_jack_report(jack->jack, jack->status);  in snd_soc_jack_report()
76 	mutex_unlock(&jack->mutex);  in snd_soc_jack_report()
81  * snd_soc_jack_add_zones - Associate voltage zones with jack
97 		list_add(&(zones[i].list), &jack->jack_zones);  in snd_soc_jack_add_zones()
104  * snd_soc_jack_get_type - Based on the mic bias value, this function returns
117 	list_for_each_entry(zone, &jack->jack_zones, list) {  in snd_soc_jack_get_type()
118 		if (micbias_voltage >= zone->min_mv &&  in snd_soc_jack_get_type()
119 			micbias_voltage < zone->max_mv)  in snd_soc_jack_get_type()
120 				return zone->jack_type;  in snd_soc_jack_get_type()
127  * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
144 			dev_err(jack->card->dev, "ASoC: No name for pin %d\n",  in snd_soc_jack_add_pins()
146 			return -EINVAL;  in snd_soc_jack_add_pins()
149 			dev_err(jack->card->dev, "ASoC: No mask for pin %d"  in snd_soc_jack_add_pins()
151 			return -EINVAL;  in snd_soc_jack_add_pins()
155 		list_add(&(pins[i].list), &jack->pins);  in snd_soc_jack_add_pins()
156 		snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);  in snd_soc_jack_add_pins()
170  * snd_soc_jack_notifier_register - Register a notifier for jack status
184 	blocking_notifier_chain_register(&jack->notifier, nb);  in snd_soc_jack_notifier_register()
189  * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
199 	blocking_notifier_chain_unregister(&jack->notifier, nb);  in snd_soc_jack_notifier_unregister()
210 /* gpio detect */
211 static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)  in snd_soc_jack_gpio_detect()  argument
213 	struct snd_soc_jack *jack = gpio->jack;  in snd_soc_jack_gpio_detect()
214 	int enable;  in snd_soc_jack_gpio_detect()  local
217 	enable = gpiod_get_value_cansleep(gpio->desc);  in snd_soc_jack_gpio_detect()
218 	if (gpio->invert)  in snd_soc_jack_gpio_detect()
219 		enable = !enable;  in snd_soc_jack_gpio_detect()
221 	if (enable)  in snd_soc_jack_gpio_detect()
222 		report = gpio->report;  in snd_soc_jack_gpio_detect()
226 	if (gpio->jack_status_check)  in snd_soc_jack_gpio_detect()
227 		report = gpio->jack_status_check(gpio->data);  in snd_soc_jack_gpio_detect()
229 	snd_soc_jack_report(jack, report, gpio->report);  in snd_soc_jack_gpio_detect()
232 /* irq handler for gpio pin */
235 	struct snd_soc_jack_gpio *gpio = data;  in gpio_handler()  local
236 	struct device *dev = gpio->jack->card->dev;  in gpio_handler()
238 	trace_snd_soc_jack_irq(gpio->name);  in gpio_handler()
241 		pm_wakeup_event(dev, gpio->debounce_time + 50);  in gpio_handler()
243 	queue_delayed_work(system_power_efficient_wq, &gpio->work,  in gpio_handler()
244 			      msecs_to_jiffies(gpio->debounce_time));  in gpio_handler()
249 /* gpio work */
252 	struct snd_soc_jack_gpio *gpio;  in gpio_work()  local
254 	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);  in gpio_work()
255 	snd_soc_jack_gpio_detect(gpio);  in gpio_work()
261 	struct snd_soc_jack_gpio *gpio =  in snd_soc_jack_pm_notifier()  local
272 		queue_delayed_work(system_power_efficient_wq, &gpio->work, 0);  in snd_soc_jack_pm_notifier()
298 	jack_free_gpios(tbl->jack, tbl->count, tbl->gpios);  in jack_devres_free_gpios()
302  * snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
306  * @gpios: array of gpio pins
308  * This function will request gpio, set data direction and request irq
309  * for each gpio in the array.
319 		return -ENOMEM;  in snd_soc_jack_add_gpios()
320 	tbl->jack = jack;  in snd_soc_jack_add_gpios()
321 	tbl->count = count;  in snd_soc_jack_add_gpios()
322 	tbl->gpios = gpios;  in snd_soc_jack_add_gpios()
326 			dev_err(jack->card->dev,  in snd_soc_jack_add_gpios()
327 				"ASoC: No name for gpio at index %d\n", i);  in snd_soc_jack_add_gpios()
328 			ret = -EINVAL;  in snd_soc_jack_add_gpios()
333 			/* Already have a GPIO descriptor. */  in snd_soc_jack_add_gpios()
336 			/* Get a GPIO descriptor */  in snd_soc_jack_add_gpios()
343 					"ASoC: Cannot get gpio at index %d: %d",  in snd_soc_jack_add_gpios()
348 			/* legacy GPIO number */  in snd_soc_jack_add_gpios()
349 			if (!gpio_is_valid(gpios[i].gpio)) {  in snd_soc_jack_add_gpios()
350 				dev_err(jack->card->dev,  in snd_soc_jack_add_gpios()
351 					"ASoC: Invalid gpio %d\n",  in snd_soc_jack_add_gpios()
352 					gpios[i].gpio);  in snd_soc_jack_add_gpios()
353 				ret = -EINVAL;  in snd_soc_jack_add_gpios()
357 			ret = gpio_request_one(gpios[i].gpio, GPIOF_IN,  in snd_soc_jack_add_gpios()
362 			gpios[i].desc = gpio_to_desc(gpios[i].gpio);  in snd_soc_jack_add_gpios()
380 				dev_err(jack->card->dev,  in snd_soc_jack_add_gpios()
381 					"ASoC: Failed to mark GPIO at index %d as wake source: %d\n",  in snd_soc_jack_add_gpios()
392 		/* Expose GPIO value over sysfs for diagnostic purposes */  in snd_soc_jack_add_gpios()
400 	devres_add(jack->card->dev, tbl);  in snd_soc_jack_add_gpios()
404 	gpio_free(gpios[i].gpio);  in snd_soc_jack_add_gpios()
414  * snd_soc_jack_add_gpiods - Associate GPIO descriptor pins with an ASoC jack
416  * @gpiod_dev: GPIO consumer device
419  * @gpios:     array of gpio pins
421  * This function will request gpio, set data direction and request irq
422  * for each gpio in the array.
438  * snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
442  * @gpios: array of gpio pins
444  * Release gpio and irq resources for gpio pins associated with an ASoC jack.
450 	devres_destroy(jack->card->dev, jack_devres_free_gpios, NULL, NULL);  in snd_soc_jack_free_gpios()