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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 <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.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->dapm.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 const struct snd_soc_dai_ops cq93vc_dai_ops = {
.digital_mute = cq93vc_mute,
.set_sysclk = cq93vc_set_dai_sysclk,
};
static struct snd_soc_dai_driver cq93vc_dai = {
.name = "cq93vc-hifi",
.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,
};
static int cq93vc_resume(struct snd_soc_codec *codec)
{
cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int cq93vc_probe(struct snd_soc_codec *codec)
{
struct davinci_vc *davinci_vc = codec->dev->platform_data;
davinci_vc->cq93vc.codec = codec;
codec->control_data = davinci_vc;
/* Set controls */
snd_soc_add_codec_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 snd_soc_codec *codec)
{
cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
.read = cq93vc_read,
.write = cq93vc_write,
.set_bias_level = cq93vc_set_bias_level,
.probe = cq93vc_probe,
.remove = cq93vc_remove,
.resume = cq93vc_resume,
};
static int cq93vc_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_cq93vc, &cq93vc_dai, 1);
}
static int cq93vc_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
static struct platform_driver cq93vc_codec_driver = {
.driver = {
.name = "cq93vc-codec",
.owner = THIS_MODULE,
},
.probe = cq93vc_platform_probe,
.remove = cq93vc_platform_remove,
};
module_platform_driver(cq93vc_codec_driver);
MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
MODULE_AUTHOR("Miguel Aguilar");
MODULE_LICENSE("GPL");
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