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/*
* ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
*
* Copyright (C) 2010 Texas Instruments, Inc
*
* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/mfd/davinci_voicecodec.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <mach/dm365.h>
#include "cq93vc.h"
static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
unsigned int reg)
{
struct davinci_vc *davinci_vc = codec->control_data;
return readl(davinci_vc->base + reg);
}
static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
struct davinci_vc *davinci_vc = codec->control_data;
writel(value, davinci_vc->base + reg);
return 0;
}
static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
};
static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
if (mute)
cq93vc_write(codec, DAVINCI_VC_REG09,
reg | DAVINCI_VC_REG09_MUTE);
else
cq93vc_write(codec, DAVINCI_VC_REG09, reg);
return 0;
}
static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct davinci_vc *davinci_vc = codec->control_data;
switch (freq) {
case 22579200:
case 27000000:
case 33868800:
davinci_vc->cq93vc.sysclk = freq;
return 0;
}
return -EINVAL;
}
static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
cq93vc_write(codec, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_ON);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
cq93vc_write(codec, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_OFF);
break;
case SND_SOC_BIAS_OFF:
/* force all power off */
cq93vc_write(codec, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_OFF);
break;
}
codec->bias_level = level;
return 0;
}
#define CQ93VC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
#define CQ93VC_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
static struct snd_soc_dai_ops cq93vc_dai_ops = {
.digital_mute = cq93vc_mute,
.set_sysclk = cq93vc_set_dai_sysclk,
};
struct snd_soc_dai cq93vc_dai = {
.name = "CQ93VC",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = CQ93VC_RATES,
.formats = CQ93VC_FORMATS,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = CQ93VC_RATES,
.formats = CQ93VC_FORMATS,},
.ops = &cq93vc_dai_ops,
};
EXPORT_SYMBOL_GPL(cq93vc_dai);
static int cq93vc_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
cq93vc_set_bias_level(codec, codec->suspend_bias_level);
return 0;
}
static struct snd_soc_codec *cq93vc_codec;
static int cq93vc_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
struct snd_soc_codec *codec;
int ret;
socdev->card->codec = cq93vc_codec;
codec = socdev->card->codec;
/* Register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
dev_err(dev, "%s: failed to create pcms\n", pdev->name);
return ret;
}
/* Set controls */
snd_soc_add_controls(codec, cq93vc_snd_controls,
ARRAY_SIZE(cq93vc_snd_controls));
/* Off, with power on */
cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int cq93vc_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_cq93vc = {
.probe = cq93vc_probe,
.remove = cq93vc_remove,
.resume = cq93vc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_cq93vc);
static __init int cq93vc_codec_probe(struct platform_device *pdev)
{
struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret;
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL) {
dev_dbg(davinci_vc->dev,
"could not allocate memory for codec data\n");
return -ENOMEM;
}
davinci_vc->cq93vc.codec = codec;
cq93vc_dai.dev = &pdev->dev;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->dev = &pdev->dev;
codec->name = "CQ93VC";
codec->owner = THIS_MODULE;
codec->read = cq93vc_read;
codec->write = cq93vc_write;
codec->set_bias_level = cq93vc_set_bias_level;
codec->dai = &cq93vc_dai;
codec->num_dai = 1;
codec->control_data = davinci_vc;
cq93vc_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret) {
dev_err(davinci_vc->dev, "failed to register codec\n");
goto fail1;
}
ret = snd_soc_register_dai(&cq93vc_dai);
if (ret) {
dev_err(davinci_vc->dev, "could register dai\n");
goto fail2;
}
return 0;
fail2:
snd_soc_unregister_codec(codec);
fail1:
kfree(codec);
cq93vc_codec = NULL;
return ret;
}
static int __devexit cq93vc_codec_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
snd_soc_unregister_dai(&cq93vc_dai);
snd_soc_unregister_codec(&codec);
kfree(codec);
cq93vc_codec = NULL;
return 0;
}
static struct platform_driver cq93vc_codec_driver = {
.driver = {
.name = "cq93vc",
.owner = THIS_MODULE,
},
.probe = cq93vc_codec_probe,
.remove = __devexit_p(cq93vc_codec_remove),
};
static __init int cq93vc_init(void)
{
return platform_driver_probe(&cq93vc_codec_driver, cq93vc_codec_probe);
}
module_init(cq93vc_init);
static __exit void cq93vc_exit(void)
{
platform_driver_unregister(&cq93vc_codec_driver);
}
module_exit(cq93vc_exit);
MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
MODULE_AUTHOR("Miguel Aguilar");
MODULE_LICENSE("GPL");
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