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linux/sound/soc/codecs/sta529.c
Javier Martinez Canillas 9abe464821 ASoC: sta529: Add OF device ID table 
The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Before this patch:

$ modinfo sound/soc/codecs/snd-soc-sta529.ko | grep alias
alias:          i2c:sta529

After this patch:

$ modinfo sound/soc/codecs/snd-soc-sta529.ko | grep alias
alias:          of:N*T*Cst,sta529C*
alias:          of:N*T*Cst,sta529
alias:          i2c:sta529

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-04-05 18:21:01 +01:00

399 lines
9.5 KiB
C
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/*
* ASoC codec driver for spear platform
*
* sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
*
* Copyright (C) 2012 ST Microelectronics
* Rajeev Kumar <rajeevkumar.linux@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pm.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
/* STA529 Register offsets */
#define STA529_FFXCFG0 0x00
#define STA529_FFXCFG1 0x01
#define STA529_MVOL 0x02
#define STA529_LVOL 0x03
#define STA529_RVOL 0x04
#define STA529_TTF0 0x05
#define STA529_TTF1 0x06
#define STA529_TTP0 0x07
#define STA529_TTP1 0x08
#define STA529_S2PCFG0 0x0A
#define STA529_S2PCFG1 0x0B
#define STA529_P2SCFG0 0x0C
#define STA529_P2SCFG1 0x0D
#define STA529_PLLCFG0 0x14
#define STA529_PLLCFG1 0x15
#define STA529_PLLCFG2 0x16
#define STA529_PLLCFG3 0x17
#define STA529_PLLPFE 0x18
#define STA529_PLLST 0x19
#define STA529_ADCCFG 0x1E /*mic_select*/
#define STA529_CKOCFG 0x1F
#define STA529_MISC 0x20
#define STA529_PADST0 0x21
#define STA529_PADST1 0x22
#define STA529_FFXST 0x23
#define STA529_PWMIN1 0x2D
#define STA529_PWMIN2 0x2E
#define STA529_POWST 0x32
#define STA529_MAX_REGISTER 0x32
#define STA529_RATES (SNDRV_PCM_RATE_8000 | \
SNDRV_PCM_RATE_11025 | \
SNDRV_PCM_RATE_16000 | \
SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_32000 | \
SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000)
#define STA529_FORMAT (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define S2PC_VALUE 0x98
#define CLOCK_OUT 0x60
#define DATA_FORMAT_MSK 0x0E
#define LEFT_J_DATA_FORMAT 0x00
#define I2S_DATA_FORMAT 0x02
#define RIGHT_J_DATA_FORMAT 0x04
#define CODEC_MUTE_VAL 0x80
#define POWER_CNTLMSAK 0x40
#define POWER_STDBY 0x40
#define FFX_MASK 0x80
#define FFX_OFF 0x80
#define POWER_UP 0x00
#define FFX_CLK_ENB 0x01
#define FFX_CLK_DIS 0x00
#define FFX_CLK_MSK 0x01
#define PLAY_FREQ_RANGE_MSK 0x70
#define CAP_FREQ_RANGE_MSK 0x0C
#define PDATA_LEN_MSK 0xC0
#define BCLK_TO_FS_MSK 0x30
#define AUDIO_MUTE_MSK 0x80
static const struct reg_default sta529_reg_defaults[] = {
{ 0, 0x35 }, /* R0 - FFX Configuration reg 0 */
{ 1, 0xc8 }, /* R1 - FFX Configuration reg 1 */
{ 2, 0x50 }, /* R2 - Master Volume */
{ 3, 0x00 }, /* R3 - Left Volume */
{ 4, 0x00 }, /* R4 - Right Volume */
{ 10, 0xb2 }, /* R10 - S2P Config Reg 0 */
{ 11, 0x41 }, /* R11 - S2P Config Reg 1 */
{ 12, 0x92 }, /* R12 - P2S Config Reg 0 */
{ 13, 0x41 }, /* R13 - P2S Config Reg 1 */
{ 30, 0xd2 }, /* R30 - ADC Config Reg */
{ 31, 0x40 }, /* R31 - clock Out Reg */
{ 32, 0x21 }, /* R32 - Misc Register */
};
struct sta529 {
struct regmap *regmap;
};
static bool sta529_readable(struct device *dev, unsigned int reg)
{
switch (reg) {
case STA529_FFXCFG0:
case STA529_FFXCFG1:
case STA529_MVOL:
case STA529_LVOL:
case STA529_RVOL:
case STA529_S2PCFG0:
case STA529_S2PCFG1:
case STA529_P2SCFG0:
case STA529_P2SCFG1:
case STA529_ADCCFG:
case STA529_CKOCFG:
case STA529_MISC:
return true;
default:
return false;
}
}
static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
"Phase-shift"};
static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
static SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
static const struct snd_kcontrol_new sta529_snd_controls[] = {
SOC_DOUBLE_R_TLV("Digital Playback Volume", STA529_LVOL, STA529_RVOL, 0,
127, 0, out_gain_tlv),
SOC_SINGLE_TLV("Master Playback Volume", STA529_MVOL, 0, 127, 1,
master_vol_tlv),
SOC_ENUM("PWM Select", pwm_src),
};
static int sta529_set_bias_level(struct snd_soc_codec *codec, enum
snd_soc_bias_level level)
{
struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
snd_soc_update_bits(codec, STA529_FFXCFG0, POWER_CNTLMSAK,
POWER_UP);
snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
FFX_CLK_ENB);
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
regcache_sync(sta529->regmap);
snd_soc_update_bits(codec, STA529_FFXCFG0,
POWER_CNTLMSAK, POWER_STDBY);
/* Making FFX output to zero */
snd_soc_update_bits(codec, STA529_FFXCFG0, FFX_MASK,
FFX_OFF);
snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
FFX_CLK_DIS);
break;
case SND_SOC_BIAS_OFF:
break;
}
return 0;
}
static int sta529_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;
int pdata, play_freq_val, record_freq_val;
int bclk_to_fs_ratio;
switch (params_width(params)) {
case 16:
pdata = 1;
bclk_to_fs_ratio = 0;
break;
case 24:
pdata = 2;
bclk_to_fs_ratio = 1;
break;
case 32:
pdata = 3;
bclk_to_fs_ratio = 2;
break;
default:
dev_err(codec->dev, "Unsupported format\n");
return -EINVAL;
}
switch (params_rate(params)) {
case 8000:
case 11025:
play_freq_val = 0;
record_freq_val = 2;
break;
case 16000:
case 22050:
play_freq_val = 1;
record_freq_val = 0;
break;
case 32000:
case 44100:
case 48000:
play_freq_val = 2;
record_freq_val = 0;
break;
default:
dev_err(codec->dev, "Unsupported rate\n");
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
snd_soc_update_bits(codec, STA529_S2PCFG1, PDATA_LEN_MSK,
pdata << 6);
snd_soc_update_bits(codec, STA529_S2PCFG1, BCLK_TO_FS_MSK,
bclk_to_fs_ratio << 4);
snd_soc_update_bits(codec, STA529_MISC, PLAY_FREQ_RANGE_MSK,
play_freq_val << 4);
} else {
snd_soc_update_bits(codec, STA529_P2SCFG1, PDATA_LEN_MSK,
pdata << 6);
snd_soc_update_bits(codec, STA529_P2SCFG1, BCLK_TO_FS_MSK,
bclk_to_fs_ratio << 4);
snd_soc_update_bits(codec, STA529_MISC, CAP_FREQ_RANGE_MSK,
record_freq_val << 2);
}
return 0;
}
static int sta529_mute(struct snd_soc_dai *dai, int mute)
{
u8 val = 0;
if (mute)
val |= CODEC_MUTE_VAL;
snd_soc_update_bits(dai->codec, STA529_FFXCFG0, AUDIO_MUTE_MSK, val);
return 0;
}
static int sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 mode = 0;
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_LEFT_J:
mode = LEFT_J_DATA_FORMAT;
break;
case SND_SOC_DAIFMT_I2S:
mode = I2S_DATA_FORMAT;
break;
case SND_SOC_DAIFMT_RIGHT_J:
mode = RIGHT_J_DATA_FORMAT;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, STA529_S2PCFG0, DATA_FORMAT_MSK, mode);
return 0;
}
static const struct snd_soc_dai_ops sta529_dai_ops = {
.hw_params = sta529_hw_params,
.set_fmt = sta529_set_dai_fmt,
.digital_mute = sta529_mute,
};
static struct snd_soc_dai_driver sta529_dai = {
.name = "sta529-audio",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = STA529_RATES,
.formats = STA529_FORMAT,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = STA529_RATES,
.formats = STA529_FORMAT,
},
.ops = &sta529_dai_ops,
};
static const struct snd_soc_codec_driver sta529_codec_driver = {
.set_bias_level = sta529_set_bias_level,
.suspend_bias_off = true,
.component_driver = {
.controls = sta529_snd_controls,
.num_controls = ARRAY_SIZE(sta529_snd_controls),
},
};
static const struct regmap_config sta529_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = STA529_MAX_REGISTER,
.readable_reg = sta529_readable,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = sta529_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
};
static int sta529_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct sta529 *sta529;
int ret;
sta529 = devm_kzalloc(&i2c->dev, sizeof(struct sta529), GFP_KERNEL);
if (!sta529)
return -ENOMEM;
sta529->regmap = devm_regmap_init_i2c(i2c, &sta529_regmap);
if (IS_ERR(sta529->regmap)) {
ret = PTR_ERR(sta529->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
i2c_set_clientdata(i2c, sta529);
ret = snd_soc_register_codec(&i2c->dev,
&sta529_codec_driver, &sta529_dai, 1);
if (ret != 0)
dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
return ret;
}
static int sta529_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id sta529_i2c_id[] = {
{ "sta529", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
static const struct of_device_id sta529_of_match[] = {
{ .compatible = "st,sta529", },
{ }
};
MODULE_DEVICE_TABLE(of, sta529_of_match);
static struct i2c_driver sta529_i2c_driver = {
.driver = {
.name = "sta529",
.of_match_table = sta529_of_match,
},
.probe = sta529_i2c_probe,
.remove = sta529_i2c_remove,
.id_table = sta529_i2c_id,
};
module_i2c_driver(sta529_i2c_driver);
MODULE_DESCRIPTION("ASoC STA529 codec driver");
MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
MODULE_LICENSE("GPL");
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