ASoC: omap: rx51: Enable McBSP2 sidetone
[linux-2.6.git] / sound / soc / soc-jack.c
index 3c07a94..ac5a5bc 100644 (file)
 
 #include <sound/jack.h>
 #include <sound/soc.h>
-#include <sound/soc-dapm.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>
+#include <trace/events/asoc.h>
 
 /**
  * snd_soc_jack_new - Create a new jack
  * Returns zero if successful, or a negative error code on failure.
  * On success jack will be initialised.
  */
-int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
+int snd_soc_jack_new(struct snd_soc_codec *codec, const char *id, int type,
                     struct snd_soc_jack *jack)
 {
-       jack->card = card;
+       jack->codec = codec;
        INIT_LIST_HEAD(&jack->pins);
+       BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
 
-       return snd_jack_new(card->codec->card, id, type, &jack->jack);
+       return snd_jack_new(codec->card->snd_card, id, type, &jack->jack);
 }
 EXPORT_SYMBOL_GPL(snd_soc_jack_new);
 
@@ -59,15 +60,18 @@ EXPORT_SYMBOL_GPL(snd_soc_jack_new);
 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
 {
        struct snd_soc_codec *codec;
+       struct snd_soc_dapm_context *dapm;
        struct snd_soc_jack_pin *pin;
        int enable;
        int oldstatus;
 
-       if (!jack) {
-               WARN_ON_ONCE(!jack);
+       trace_snd_soc_jack_report(jack, mask, status);
+
+       if (!jack)
                return;
-       }
-       codec = jack->card->codec;
+
+       codec = jack->codec;
+       dapm =  &codec->dapm;
 
        mutex_lock(&codec->mutex);
 
@@ -81,6 +85,8 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
        if (mask && (jack->status == oldstatus))
                goto out;
 
+       trace_snd_soc_jack_notify(jack, status);
+
        list_for_each_entry(pin, &jack->pins, list) {
                enable = pin->mask & jack->status;
 
@@ -88,12 +94,15 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
                        enable = !enable;
 
                if (enable)
-                       snd_soc_dapm_enable_pin(codec, pin->pin);
+                       snd_soc_dapm_enable_pin(dapm, pin->pin);
                else
-                       snd_soc_dapm_disable_pin(codec, pin->pin);
+                       snd_soc_dapm_disable_pin(dapm, pin->pin);
        }
 
-       snd_soc_dapm_sync(codec);
+       /* Report before the DAPM sync to help users updating micbias status */
+       blocking_notifier_call_chain(&jack->notifier, status, NULL);
+
+       snd_soc_dapm_sync(dapm);
 
        snd_jack_report(jack->jack, status);
 
@@ -143,6 +152,40 @@ int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
 }
 EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
 
+/**
+ * snd_soc_jack_notifier_register - Register a notifier for jack status
+ *
+ * @jack:  ASoC jack
+ * @nb:    Notifier block to register
+ *
+ * Register for notification of the current status of the jack.  Note
+ * that it is not possible to report additional jack events in the
+ * callback from the notifier, this is intended to support
+ * applications such as enabling electrical detection only when a
+ * mechanical detection event has occurred.
+ */
+void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
+                                   struct notifier_block *nb)
+{
+       blocking_notifier_chain_register(&jack->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
+
+/**
+ * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
+ *
+ * @jack:  ASoC jack
+ * @nb:    Notifier block to unregister
+ *
+ * Stop notifying for status changes.
+ */
+void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
+                                     struct notifier_block *nb)
+{
+       blocking_notifier_chain_unregister(&jack->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
+
 #ifdef CONFIG_GPIOLIB
 /* gpio detect */
 static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
@@ -151,9 +194,6 @@ static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
        int enable;
        int report;
 
-       if (gpio->debounce_time > 0)
-               mdelay(gpio->debounce_time);
-
        enable = gpio_get_value(gpio->gpio);
        if (gpio->invert)
                enable = !enable;
@@ -173,8 +213,15 @@ static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
 static irqreturn_t gpio_handler(int irq, void *data)
 {
        struct snd_soc_jack_gpio *gpio = data;
+       struct device *dev = gpio->jack->codec->card->dev;
+
+       trace_snd_soc_jack_irq(gpio->name);
+
+       if (device_may_wakeup(dev))
+               pm_wakeup_event(dev, gpio->debounce_time + 50);
 
-       schedule_work(&gpio->work);
+       schedule_delayed_work(&gpio->work,
+                             msecs_to_jiffies(gpio->debounce_time));
 
        return IRQ_HANDLED;
 }
@@ -184,7 +231,7 @@ static void gpio_work(struct work_struct *work)
 {
        struct snd_soc_jack_gpio *gpio;
 
-       gpio = container_of(work, struct snd_soc_jack_gpio, work);
+       gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
        snd_soc_jack_gpio_detect(gpio);
 }
 
@@ -225,14 +272,15 @@ int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
                if (ret)
                        goto err;
 
-               INIT_WORK(&gpios[i].work, gpio_work);
+               INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
                gpios[i].jack = jack;
 
-               ret = request_irq(gpio_to_irq(gpios[i].gpio),
-                               gpio_handler,
-                               IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-                               jack->card->dev->driver->name,
-                               &gpios[i]);
+               ret = request_any_context_irq(gpio_to_irq(gpios[i].gpio),
+                                             gpio_handler,
+                                             IRQF_TRIGGER_RISING |
+                                             IRQF_TRIGGER_FALLING,
+                                             jack->codec->dev->driver->name,
+                                             &gpios[i]);
                if (ret)
                        goto err;
 
@@ -275,6 +323,7 @@ void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
                gpio_unexport(gpios[i].gpio);
 #endif
                free_irq(gpio_to_irq(gpios[i].gpio), &gpios[i]);
+               cancel_delayed_work_sync(&gpios[i].work);
                gpio_free(gpios[i].gpio);
                gpios[i].jack = NULL;
        }