From 979b81ade4aa8be89ab5c500b753a1e2554d75ae Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 3 Mar 2009 11:28:17 +0000 Subject: ASoC: Add SND_SOC_DAPM_PIN_SWITCH controls for exposing DAPM pins On some systems it is desirable for control for DAPM pins to be provided to user space. This is the case with things like GSM modems which are controlled primarily from user space, for example. Provide a helper which exposes the state of a DAPM pin to user space for use in cases like this. Signed-off-by: Mark Brown --- sound/soc/soc-dapm.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) (limited to 'sound') diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 209b058efc6..dc8a066ac15 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1413,6 +1413,76 @@ out: } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double); +/** + * snd_soc_dapm_info_pin_switch - Info for a pin switch + * + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a pin switch control. + */ +int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch); + +/** + * snd_soc_dapm_get_pin_switch - Get information for a pin switch + * + * @kcontrol: mixer control + * @ucontrol: Value + */ +int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + const char *pin = (const char *)kcontrol->private_value; + + mutex_lock(&codec->mutex); + + ucontrol->value.integer.value[0] = + snd_soc_dapm_get_pin_status(codec, pin); + + mutex_unlock(&codec->mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch); + +/** + * snd_soc_dapm_put_pin_switch - Set information for a pin switch + * + * @kcontrol: mixer control + * @ucontrol: Value + */ +int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + const char *pin = (const char *)kcontrol->private_value; + + mutex_lock(&codec->mutex); + + if (ucontrol->value.integer.value[0]) + snd_soc_dapm_enable_pin(codec, pin); + else + snd_soc_dapm_disable_pin(codec, pin); + + snd_soc_dapm_sync(codec); + + mutex_unlock(&codec->mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch); + /** * snd_soc_dapm_new_control - create new dapm control * @codec: audio codec -- cgit v1.2.3