1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-jack.c  --  ALSA SoC jack handling
11 #include <linux/gpio/consumer.h>
20  * snd_soc_jack_report - Report the current status for a jack
39 	if (!jack || !jack->jack)  in snd_soc_jack_report()
43 	dapm = &jack->card->dapm;  in snd_soc_jack_report()
45 	mutex_lock(&jack->mutex);  in snd_soc_jack_report()
47 	jack->status &= ~mask;  in snd_soc_jack_report()
48 	jack->status |= status & mask;  in snd_soc_jack_report()
52 	list_for_each_entry(pin, &jack->pins, list) {  in snd_soc_jack_report()
53 		int enable = pin->mask & jack->status;  in snd_soc_jack_report()  local
55 		if (pin->invert)  in snd_soc_jack_report()
56 			enable = !enable;  in snd_soc_jack_report()
58 		if (enable)  in snd_soc_jack_report()
59 			snd_soc_dapm_enable_pin(dapm, pin->pin);  in snd_soc_jack_report()
61 			snd_soc_dapm_disable_pin(dapm, pin->pin);  in snd_soc_jack_report()
68 	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);  in snd_soc_jack_report()
73 	snd_jack_report(jack->jack, jack->status);  in snd_soc_jack_report()
75 	mutex_unlock(&jack->mutex);  in snd_soc_jack_report()
80  * snd_soc_jack_add_zones - Associate voltage zones with jack
96 		list_add(&(zones[i].list), &jack->jack_zones);  in snd_soc_jack_add_zones()
103  * snd_soc_jack_get_type - Based on the mic bias value, this function returns
116 	list_for_each_entry(zone, &jack->jack_zones, list) {  in snd_soc_jack_get_type()
117 		if (micbias_voltage >= zone->min_mv &&  in snd_soc_jack_get_type()
118 			micbias_voltage < zone->max_mv)  in snd_soc_jack_get_type()
119 				return zone->jack_type;  in snd_soc_jack_get_type()
126  * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
143 			dev_err(jack->card->dev, "ASoC: No name for pin %d\n",  in snd_soc_jack_add_pins()
145 			return -EINVAL;  in snd_soc_jack_add_pins()
148 			dev_err(jack->card->dev, "ASoC: No mask for pin %d"  in snd_soc_jack_add_pins()
150 			return -EINVAL;  in snd_soc_jack_add_pins()
154 		list_add(&(pins[i].list), &jack->pins);  in snd_soc_jack_add_pins()
155 		snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);  in snd_soc_jack_add_pins()
169  * snd_soc_jack_notifier_register - Register a notifier for jack status
183 	blocking_notifier_chain_register(&jack->notifier, nb);  in snd_soc_jack_notifier_register()
188  * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
198 	blocking_notifier_chain_unregister(&jack->notifier, nb);  in snd_soc_jack_notifier_unregister()
209 /* gpio detect */
210 static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)  in snd_soc_jack_gpio_detect()  argument
212 	struct snd_soc_jack *jack = gpio->jack;  in snd_soc_jack_gpio_detect()
213 	int enable;  in snd_soc_jack_gpio_detect()  local
216 	enable = gpiod_get_value_cansleep(gpio->desc);  in snd_soc_jack_gpio_detect()
217 	if (gpio->invert)  in snd_soc_jack_gpio_detect()
218 		enable = !enable;  in snd_soc_jack_gpio_detect()
220 	if (enable)  in snd_soc_jack_gpio_detect()
221 		report = gpio->report;  in snd_soc_jack_gpio_detect()
225 	if (gpio->jack_status_check)  in snd_soc_jack_gpio_detect()
226 		report = gpio->jack_status_check(gpio->data);  in snd_soc_jack_gpio_detect()
228 	snd_soc_jack_report(jack, report, gpio->report);  in snd_soc_jack_gpio_detect()
231 /* irq handler for gpio pin */
234 	struct snd_soc_jack_gpio *gpio = data;  in gpio_handler()  local
235 	struct device *dev = gpio->jack->card->dev;  in gpio_handler()
237 	trace_snd_soc_jack_irq(gpio->name);  in gpio_handler()
240 		pm_wakeup_event(dev, gpio->debounce_time + 50);  in gpio_handler()
242 	queue_delayed_work(system_power_efficient_wq, &gpio->work,  in gpio_handler()
243 			      msecs_to_jiffies(gpio->debounce_time));  in gpio_handler()
248 /* gpio work */
251 	struct snd_soc_jack_gpio *gpio;  in gpio_work()  local
253 	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);  in gpio_work()
254 	snd_soc_jack_gpio_detect(gpio);  in gpio_work()
260 	struct snd_soc_jack_gpio *gpio =  in snd_soc_jack_pm_notifier()  local
271 		queue_delayed_work(system_power_efficient_wq, &gpio->work, 0);  in snd_soc_jack_pm_notifier()
297 	jack_free_gpios(tbl->jack, tbl->count, tbl->gpios);  in jack_devres_free_gpios()
301  * snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
305  * @gpios: array of gpio pins
307  * This function will request gpio, set data direction and request irq
308  * for each gpio in the array.
318 		return -ENOMEM;  in snd_soc_jack_add_gpios()
319 	tbl->jack = jack;  in snd_soc_jack_add_gpios()
320 	tbl->count = count;  in snd_soc_jack_add_gpios()
321 	tbl->gpios = gpios;  in snd_soc_jack_add_gpios()
325 			dev_err(jack->card->dev,  in snd_soc_jack_add_gpios()
326 				"ASoC: No name for gpio at index %d\n", i);  in snd_soc_jack_add_gpios()
327 			ret = -EINVAL;  in snd_soc_jack_add_gpios()
332 			/* Already have a GPIO descriptor. */  in snd_soc_jack_add_gpios()
335 			/* Get a GPIO descriptor */  in snd_soc_jack_add_gpios()
342 					"ASoC: Cannot get gpio at index %d: %d",  in snd_soc_jack_add_gpios()
347 			dev_err(jack->card->dev, "ASoC: Invalid gpio at index %d\n", i);  in snd_soc_jack_add_gpios()
348 		        ret = -EINVAL;  in snd_soc_jack_add_gpios()
368 				dev_err(jack->card->dev,  in snd_soc_jack_add_gpios()
369 					"ASoC: Failed to mark GPIO at index %d as wake source: %d\n",  in snd_soc_jack_add_gpios()
380 		/* Expose GPIO value over sysfs for diagnostic purposes */  in snd_soc_jack_add_gpios()
388 	devres_add(jack->card->dev, tbl);  in snd_soc_jack_add_gpios()
400  * snd_soc_jack_add_gpiods - Associate GPIO descriptor pins with an ASoC jack
402  * @gpiod_dev: GPIO consumer device
405  * @gpios:     array of gpio pins
407  * This function will request gpio, set data direction and request irq
408  * for each gpio in the array.
424  * snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
428  * @gpios: array of gpio pins
430  * Release gpio and irq resources for gpio pins associated with an ASoC jack.
436 	devres_destroy(jack->card->dev, jack_devres_free_gpios, NULL, NULL);  in snd_soc_jack_free_gpios()