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linux/sound/soc/codecs/max9850.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

390 lines
9.4 KiB
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/*
* max9850.c -- codec driver for max9850
*
* Copyright (C) 2011 taskit GmbH
*
* Author: Christian Glindkamp <christian.glindkamp@taskit.de>
*
* Initial development of this code was funded by
* MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9850.h"
struct max9850_priv {
unsigned int sysclk;
};
/* max9850 register cache */
static const u8 max9850_reg[MAX9850_CACHEREGNUM] = {
0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* these registers are not used at the moment but provided for the sake of
* completeness */
static int max9850_volatile_register(struct snd_soc_codec *codec,
unsigned int reg)
{
switch (reg) {
case MAX9850_STATUSA:
case MAX9850_STATUSB:
return 1;
default:
return 0;
}
}
static const unsigned int max9850_tlv[] = {
TLV_DB_RANGE_HEAD(4),
0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
};
static const struct snd_kcontrol_new max9850_controls[] = {
SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
};
static const struct snd_kcontrol_new max9850_mixer_controls[] = {
SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
};
static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
&max9850_mixer_controls[0],
ARRAY_SIZE(max9850_mixer_controls)),
SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
SND_SOC_DAPM_OUTPUT("OUTL"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("OUTR"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_INPUT("INL"),
SND_SOC_DAPM_INPUT("INR"),
};
static const struct snd_soc_dapm_route intercon[] = {
/* output mixer */
{"Output Mixer", NULL, "DAC"},
{"Output Mixer", "Line In Switch", "Line Input"},
/* outputs */
{"Headphone Output", NULL, "Output Mixer"},
{"HPL", NULL, "Headphone Output"},
{"HPR", NULL, "Headphone Output"},
{"OUTL", NULL, "Output Mixer"},
{"OUTR", NULL, "Output Mixer"},
/* inputs */
{"Line Input", NULL, "INL"},
{"Line Input", NULL, "INR"},
/* supplies */
{"Output Mixer", NULL, "Charge Pump 1"},
{"Output Mixer", NULL, "Charge Pump 2"},
{"Output Mixer", NULL, "SHDN"},
{"DAC", NULL, "MCLK"},
};
static int max9850_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
u64 lrclk_div;
u8 sf, da;
if (!max9850->sysclk)
return -EINVAL;
/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
lrclk_div = (1 << 22);
lrclk_div *= params_rate(params);
lrclk_div *= sf;
do_div(lrclk_div, max9850->sysclk);
snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
da = 0;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
da = 0x2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
da = 0x3;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
return 0;
}
static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
/* calculate mclk -> iclk divider */
if (freq <= 13000000)
snd_soc_write(codec, MAX9850_CLOCK, 0x0);
else if (freq <= 26000000)
snd_soc_write(codec, MAX9850_CLOCK, 0x4);
else if (freq <= 40000000)
snd_soc_write(codec, MAX9850_CLOCK, 0x8);
else
return -EINVAL;
max9850->sysclk = freq;
return 0;
}
static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 da = 0;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
da |= MAX9850_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
da |= MAX9850_DLY;
break;
case SND_SOC_DAIFMT_RIGHT_J:
da |= MAX9850_RTJ;
break;
case SND_SOC_DAIFMT_LEFT_J:
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
da |= MAX9850_BCINV | MAX9850_INV;
break;
case SND_SOC_DAIFMT_IB_NF:
da |= MAX9850_BCINV;
break;
case SND_SOC_DAIFMT_NB_IF:
da |= MAX9850_INV;
break;
default:
return -EINVAL;
}
/* set da */
snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
return 0;
}
static int max9850_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = snd_soc_cache_sync(codec);
if (ret) {
dev_err(codec->dev,
"Failed to sync cache: %d\n", ret);
return ret;
}
}
break;
case SND_SOC_BIAS_OFF:
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops max9850_dai_ops = {
.hw_params = max9850_hw_params,
.set_sysclk = max9850_set_dai_sysclk,
.set_fmt = max9850_set_dai_fmt,
};
static struct snd_soc_dai_driver max9850_dai = {
.name = "max9850-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = MAX9850_RATES,
.formats = MAX9850_FORMATS
},
.ops = &max9850_dai_ops,
};
#ifdef CONFIG_PM
static int max9850_suspend(struct snd_soc_codec *codec)
{
max9850_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int max9850_resume(struct snd_soc_codec *codec)
{
max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define max9850_suspend NULL
#define max9850_resume NULL
#endif
static int max9850_probe(struct snd_soc_codec *codec)
{
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
/* enable zero-detect */
snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
/* enable slew-rate control */
snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
/* set slew-rate 125ms */
snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
snd_soc_dapm_new_controls(dapm, max9850_dapm_widgets,
ARRAY_SIZE(max9850_dapm_widgets));
snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
snd_soc_add_controls(codec, max9850_controls,
ARRAY_SIZE(max9850_controls));
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
.probe = max9850_probe,
.suspend = max9850_suspend,
.resume = max9850_resume,
.set_bias_level = max9850_set_bias_level,
.reg_cache_size = ARRAY_SIZE(max9850_reg),
.reg_word_size = sizeof(u8),
.reg_cache_default = max9850_reg,
.volatile_register = max9850_volatile_register,
};
static int __devinit max9850_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max9850_priv *max9850;
int ret;
max9850 = kzalloc(sizeof(struct max9850_priv), GFP_KERNEL);
if (max9850 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, max9850);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_max9850, &max9850_dai, 1);
if (ret < 0)
kfree(max9850);
return ret;
}
static __devexit int max9850_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
kfree(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id max9850_i2c_id[] = {
{ "max9850", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
static struct i2c_driver max9850_i2c_driver = {
.driver = {
.name = "max9850",
.owner = THIS_MODULE,
},
.probe = max9850_i2c_probe,
.remove = __devexit_p(max9850_i2c_remove),
.id_table = max9850_i2c_id,
};
static int __init max9850_init(void)
{
return i2c_add_driver(&max9850_i2c_driver);
}
module_init(max9850_init);
static void __exit max9850_exit(void)
{
i2c_del_driver(&max9850_i2c_driver);
}
module_exit(max9850_exit);
MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
MODULE_LICENSE("GPL");
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