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Commit 78adaeb2 authored by Javier Martin's avatar Javier Martin Committed by Mark Brown
Browse files

ASoC: Add external amplifier controls for Visstrim_M10. 



Visstrim_M10 has an external class D amplifier.
This patch provides support for controlling the 4
possible gain levels and per channel muting.

Signed-off-by: default avatarJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 3a4cbf88

sound/soc/imx/mx27vis-aic32x4.c

+80 −0
Original line number Diff line number Diff line
@@ -25,16 +25,37 @@ 
#include <linux/moduleparam.h>

#include <linux/device.h>

#include <linux/i2c.h>

#include <linux/gpio.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

#include <sound/tlv.h>

#include <asm/mach-types.h>

#include <mach/audmux.h>

#include <mach/iomux-mx27.h>



#include "../codecs/tlv320aic32x4.h"

#include "imx-ssi.h"



#define MX27VIS_AMP_GAIN	0

#define MX27VIS_AMP_MUTE	1



#define MX27VIS_PIN_G0		(GPIO_PORTF + 9)

#define MX27VIS_PIN_G1		(GPIO_PORTF + 8)

#define MX27VIS_PIN_SDL		(GPIO_PORTE + 5)

#define MX27VIS_PIN_SDR		(GPIO_PORTF + 7)



static int mx27vis_amp_gain;

static int mx27vis_amp_mute;



static const int mx27vis_amp_pins[] = {

	MX27VIS_PIN_G0 | GPIO_GPIO | GPIO_OUT,

	MX27VIS_PIN_G1 | GPIO_GPIO | GPIO_OUT,

	MX27VIS_PIN_SDL | GPIO_GPIO | GPIO_OUT,

	MX27VIS_PIN_SDR | GPIO_GPIO | GPIO_OUT,

};



static int mx27vis_aic32x4_hw_params(struct snd_pcm_substream *substream,

			    struct snd_pcm_hw_params *params)

{
@@ -74,8 +95,60 @@ static struct snd_soc_ops mx27vis_aic32x4_snd_ops = { 
	.hw_params	= mx27vis_aic32x4_hw_params,

};



static int mx27vis_amp_set(struct snd_kcontrol *kcontrol,

			    struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

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

	unsigned int reg = mc->reg;

	int max = mc->max;



	if (value > max)

		return -EINVAL;



	switch (reg) {

	case MX27VIS_AMP_GAIN:

		gpio_set_value(MX27VIS_PIN_G0, value & 1);

		gpio_set_value(MX27VIS_PIN_G1, value >> 1);

		mx27vis_amp_gain = value;

		break;

	case MX27VIS_AMP_MUTE:

		gpio_set_value(MX27VIS_PIN_SDL, value & 1);

		gpio_set_value(MX27VIS_PIN_SDR, value >> 1);

		mx27vis_amp_mute = value;

		break;

	}

	return 0;

}



static int mx27vis_amp_get(struct snd_kcontrol *kcontrol,

			    struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	unsigned int reg = mc->reg;



	switch (reg) {

	case MX27VIS_AMP_GAIN:

		ucontrol->value.integer.value[0] = mx27vis_amp_gain;

		break;

	case MX27VIS_AMP_MUTE:

		ucontrol->value.integer.value[0] = mx27vis_amp_mute;

		break;

	}

	return 0;

}



/* From 6dB to 24dB in steps of 6dB */

static const DECLARE_TLV_DB_SCALE(mx27vis_amp_tlv, 600, 600, 0);



static const struct snd_kcontrol_new mx27vis_aic32x4_controls[] = {

	SOC_DAPM_PIN_SWITCH("External Mic"),

	SOC_SINGLE_EXT_TLV("LO Ext Boost", MX27VIS_AMP_GAIN, 0, 3, 0,

		       mx27vis_amp_get, mx27vis_amp_set, mx27vis_amp_tlv),

	SOC_DOUBLE_EXT("LO Ext Mute Switch", MX27VIS_AMP_MUTE, 0, 1, 1, 0,

		       mx27vis_amp_get, mx27vis_amp_set),

};



static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
@@ -146,6 +219,13 @@ static int __init mx27vis_aic32x4_init(void) 
			MXC_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)

	);



	ret = mxc_gpio_setup_multiple_pins(mx27vis_amp_pins,

			ARRAY_SIZE(mx27vis_amp_pins), "MX27VIS_AMP");

	if (ret) {

		printk(KERN_ERR "ASoC: unable to setup gpios\n");

		platform_device_put(mx27vis_aic32x4_snd_device);

	}



	return ret;

}