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Commit 1a4ba05e authored by Daniel Mack's avatar Daniel Mack Committed by Mark Brown
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ASoC: cs4270: add Master Playback Switch 



This adds a new control named 'Master Playback Switch' for cs4270
codecs. It is implemented using the new SOC_DOUBLE_EXT macro to catch
the put function and store the information about manually set mute
controls from userspace. When a manual mute is set, we don't want the
soc core to un-mute the outputs.

Renamed cs4270_mute() to cs4270_dai_mute() to avoid confusion.

Signed-off-by: default avatarDaniel Mack <daniel@caiaq.de>
Acked-by: default avatarTimur Tabi <timur@freescale.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 9c935386

sound/soc/codecs/cs4270.c

+39 −5
Original line number Diff line number Diff line
@@ -109,6 +109,7 @@ struct cs4270_private { 
	unsigned int mclk; /* Input frequency of the MCLK pin */

	unsigned int mode; /* The mode (I2S or left-justified) */

	unsigned int slave_mode;

	unsigned int manual_mute;

};



/**
@@ -453,7 +454,7 @@ static int cs4270_hw_params(struct snd_pcm_substream *substream, 
}



/**

 * cs4270_mute - enable/disable the CS4270 external mute

 * cs4270_dai_mute - enable/disable the CS4270 external mute

 * @dai: the SOC DAI

 * @mute: 0 = disable mute, 1 = enable mute

 *
@@ -462,21 +463,52 @@ static int cs4270_hw_params(struct snd_pcm_substream *substream, 
 * board does not have the MUTEA or MUTEB pins connected to such circuitry,

 * then this function will do nothing.

 */

static int cs4270_mute(struct snd_soc_dai *dai, int mute)

static int cs4270_dai_mute(struct snd_soc_dai *dai, int mute)

{

	struct snd_soc_codec *codec = dai->codec;

	struct cs4270_private *cs4270 = codec->private_data;

	int reg6;



	reg6 = snd_soc_read(codec, CS4270_MUTE);



	if (mute)

		reg6 |= CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B;

	else

	else {

		reg6 &= ~(CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B);

		reg6 |= cs4270->manual_mute;

	}



	return snd_soc_write(codec, CS4270_MUTE, reg6);

}



/**

 * cs4270_soc_put_mute - put callback for the 'Master Playback switch'

 * 			 alsa control.

 * @kcontrol: mixer control

 * @ucontrol: control element information

 *

 * This function basically passes the arguments on to the generic

 * snd_soc_put_volsw() function and saves the mute information in

 * our private data structure. This is because we want to prevent

 * cs4270_dai_mute() neglecting the user's decision to manually

 * mute the codec's output.

 *

 * Returns 0 for success.

 */

static int cs4270_soc_put_mute(struct snd_kcontrol *kcontrol,

				struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct cs4270_private *cs4270 = codec->private_data;

	int left = !ucontrol->value.integer.value[0];

	int right = !ucontrol->value.integer.value[1];



	cs4270->manual_mute = (left ? CS4270_MUTE_DAC_A : 0) |

			      (right ? CS4270_MUTE_DAC_B : 0);



	return snd_soc_put_volsw(kcontrol, ucontrol);

}



/* A list of non-DAPM controls that the CS4270 supports */

static const struct snd_kcontrol_new cs4270_snd_controls[] = {

	SOC_DOUBLE_R("Master Playback Volume",
@@ -486,7 +518,9 @@ static const struct snd_kcontrol_new cs4270_snd_controls[] = { 
	SOC_SINGLE("Zero Cross Switch", CS4270_TRANS, 5, 1, 0),

	SOC_SINGLE("Popguard Switch", CS4270_MODE, 0, 1, 1),

	SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0),

	SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1)

	SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1),

	SOC_DOUBLE_EXT("Master Playback Switch", CS4270_MUTE, 0, 1, 1, 1,

		snd_soc_get_volsw, cs4270_soc_put_mute),

};



/*
@@ -506,7 +540,7 @@ static struct snd_soc_dai_ops cs4270_dai_ops = { 
	.hw_params	= cs4270_hw_params,

	.set_sysclk	= cs4270_set_dai_sysclk,

	.set_fmt	= cs4270_set_dai_fmt,

	.digital_mute	= cs4270_mute,

	.digital_mute	= cs4270_dai_mute,

};



struct snd_soc_dai cs4270_dai = {