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ASoC: Add external amplifier controls for Visstrim_M10.

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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: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Javier Martin 2012-01-20 10:16:57 +01:00 committed by Mark Brown
parent 3a4cbf8896
commit 78adaeb2ae
1 changed files with 80 additions and 0 deletions
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80
sound/soc/imx/mx27vis-aic32x4.c
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@ -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;
}