pcm3008.c
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/*
* ALSA Soc PCM3008 codec support
*
* Author: Hugo Villeneuve
* Copyright (C) 2008 Lyrtech inc
*
* Based on AC97 Soc codec, original copyright follow:
* Copyright 2005 Wolfson Microelectronics PLC.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Generic PCM3008 support.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include "pcm3008.h"
static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_codec *codec = w->codec;
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdda_pin,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_codec *codec = w->codec;
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdad_pin,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("VINL"),
SND_SOC_DAPM_INPUT("VINR"),
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};
static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
{ "PCM3008 Capture", NULL, "ADC" },
{ "ADC", NULL, "VINL" },
{ "ADC", NULL, "VINR" },
{ "DAC", NULL, "PCM3008 Playback" },
{ "VOUTL", NULL, "DAC" },
{ "VOUTR", NULL, "DAC" },
};
#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000)
static struct snd_soc_dai_driver pcm3008_dai = {
.name = "pcm3008-hifi",
.playback = {
.stream_name = "PCM3008 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = PCM3008_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "PCM3008 Capture",
.channels_min = 1,
.channels_max = 2,
.rates = PCM3008_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
};
static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
.dapm_widgets = pcm3008_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
.dapm_routes = pcm3008_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),
};
static int pcm3008_codec_probe(struct platform_device *pdev)
{
struct pcm3008_setup_data *setup = pdev->dev.platform_data;
int ret;
if (!setup)
return -EINVAL;
/* DEM1 DEM0 DE-EMPHASIS_MODE
* Low Low De-emphasis 44.1 kHz ON
* Low High De-emphasis OFF
* High Low De-emphasis 48 kHz ON
* High High De-emphasis 32 kHz ON
*/
/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
GPIOF_OUT_INIT_HIGH, "codec_dem0");
if (ret != 0)
return ret;
/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
GPIOF_OUT_INIT_LOW, "codec_dem1");
if (ret != 0)
return ret;
/* Configure PDAD GPIO. */
ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
GPIOF_OUT_INIT_LOW, "codec_pdad");
if (ret != 0)
return ret;
/* Configure PDDA GPIO. */
ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
GPIOF_OUT_INIT_LOW, "codec_pdda");
if (ret != 0)
return ret;
return snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_pcm3008, &pcm3008_dai, 1);
}
static int pcm3008_codec_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
MODULE_ALIAS("platform:pcm3008-codec");
static struct platform_driver pcm3008_codec_driver = {
.probe = pcm3008_codec_probe,
.remove = pcm3008_codec_remove,
.driver = {
.name = "pcm3008-codec",
.owner = THIS_MODULE,
},
};
module_platform_driver(pcm3008_codec_driver);
MODULE_DESCRIPTION("Soc PCM3008 driver");
MODULE_AUTHOR("Hugo Villeneuve");
MODULE_LICENSE("GPL");