kernel-ark/sound/soc/codecs/pcm3008.c
Lars-Peter Clausen 84b315ee89 ASoC: Drop unused state parameter from CODEC suspend callback
The existence of this parameter is purely historical. None of the CODEC drivers
uses it and we always pass in the same value anyway, so it should be safe to
remove it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-02 10:32:03 +00:00

180 lines
4.2 KiB
C

/*
* 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"
#define PCM3008_VERSION "0.2"
#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 void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
{
gpio_free(setup->dem0_pin);
gpio_free(setup->dem1_pin);
gpio_free(setup->pdad_pin);
gpio_free(setup->pdda_pin);
}
static int pcm3008_soc_probe(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
int ret = 0;
printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
/* 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 = gpio_request(setup->dem0_pin, "codec_dem0");
if (ret == 0)
ret = gpio_direction_output(setup->dem0_pin, 1);
if (ret != 0)
goto gpio_err;
/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
ret = gpio_request(setup->dem1_pin, "codec_dem1");
if (ret == 0)
ret = gpio_direction_output(setup->dem1_pin, 0);
if (ret != 0)
goto gpio_err;
/* Configure PDAD GPIO. */
ret = gpio_request(setup->pdad_pin, "codec_pdad");
if (ret == 0)
ret = gpio_direction_output(setup->pdad_pin, 1);
if (ret != 0)
goto gpio_err;
/* Configure PDDA GPIO. */
ret = gpio_request(setup->pdda_pin, "codec_pdda");
if (ret == 0)
ret = gpio_direction_output(setup->pdda_pin, 1);
if (ret != 0)
goto gpio_err;
return ret;
gpio_err:
pcm3008_gpio_free(setup);
return ret;
}
static int pcm3008_soc_remove(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
pcm3008_gpio_free(setup);
return 0;
}
#ifdef CONFIG_PM
static int pcm3008_soc_suspend(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value(setup->pdad_pin, 0);
gpio_set_value(setup->pdda_pin, 0);
return 0;
}
static int pcm3008_soc_resume(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value(setup->pdad_pin, 1);
gpio_set_value(setup->pdda_pin, 1);
return 0;
}
#else
#define pcm3008_soc_suspend NULL
#define pcm3008_soc_resume NULL
#endif
static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
.probe = pcm3008_soc_probe,
.remove = pcm3008_soc_remove,
.suspend = pcm3008_soc_suspend,
.resume = pcm3008_soc_resume,
};
static int __devinit pcm3008_codec_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_pcm3008, &pcm3008_dai, 1);
}
static int __devexit 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 = __devexit_p(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");