redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/sound/soc/codecs/tlv320aic26.c
Mark Brown 4a11bc2fdd ASoC: tlv320aic26: Add basic DAPM support 
Provide external widgets for the CODEC to ensure the device continues to
function with DAPM mandatory and to make it easier to hook the device up
to other components.

Signed-off-by: Mark Brown <broonie@linaro.org>
2013-08-16 12:32:44 +01:00

469 lines
13 KiB
C
Raw Blame History

/*
* Texas Instruments TLV320AIC26 low power audio CODEC
* ALSA SoC CODEC driver
*
* Copyright (C) 2008 Secret Lab Technologies Ltd.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include "tlv320aic26.h"
MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
MODULE_LICENSE("GPL");
/* AIC26 driver private data */
struct aic26 {
struct spi_device *spi;
struct snd_soc_codec *codec;
int master;
int datfm;
int mclk;
/* Keyclick parameters */
int keyclick_amplitude;
int keyclick_freq;
int keyclick_len;
};
/* ---------------------------------------------------------------------
* Register access routines
*/
static unsigned int aic26_reg_read(struct snd_soc_codec *codec,
unsigned int reg)
{
struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
u16 *cache = codec->reg_cache;
u16 cmd, value;
u8 buffer[2];
int rc;
if (reg >= AIC26_NUM_REGS) {
WARN_ON_ONCE(1);
return 0;
}
/* Do SPI transfer; first 16bits are command; remaining is
* register contents */
cmd = AIC26_READ_COMMAND_WORD(reg);
buffer[0] = (cmd >> 8) & 0xff;
buffer[1] = cmd & 0xff;
rc = spi_write_then_read(aic26->spi, buffer, 2, buffer, 2);
if (rc) {
dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
return -EIO;
}
value = (buffer[0] << 8) | buffer[1];
/* Update the cache before returning with the value */
cache[reg] = value;
return value;
}
static unsigned int aic26_reg_read_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg >= AIC26_NUM_REGS) {
WARN_ON_ONCE(1);
return 0;
}
return cache[reg];
}
static int aic26_reg_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
u16 *cache = codec->reg_cache;
u16 cmd;
u8 buffer[4];
int rc;
if (reg >= AIC26_NUM_REGS) {
WARN_ON_ONCE(1);
return -EINVAL;
}
/* Do SPI transfer; first 16bits are command; remaining is data
* to write into register */
cmd = AIC26_WRITE_COMMAND_WORD(reg);
buffer[0] = (cmd >> 8) & 0xff;
buffer[1] = cmd & 0xff;
buffer[2] = value >> 8;
buffer[3] = value;
rc = spi_write(aic26->spi, buffer, 4);
if (rc) {
dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
return -EIO;
}
/* update cache before returning */
cache[reg] = value;
return 0;
}
static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("HPR"),
};
static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = {
{ "Capture", NULL, "MICIN" },
{ "Capture", NULL, "AUX" },
{ "HPL", NULL, "Playback" },
{ "HPR", NULL, "Playback" },
};
/* ---------------------------------------------------------------------
* Digital Audio Interface Operations
*/
static int aic26_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 aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
int fsref, divisor, wlen, pval, jval, dval, qval;
u16 reg;
dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
substream, params);
dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params),
params_format(params));
switch (params_rate(params)) {
case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
default:
dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
}
/* select data word length */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break;
case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break;
case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break;
case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break;
default:
dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
}
/**
* Configure PLL
* fsref = (mclk * PLLM) / 2048
* where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal)
*/
pval = 1;
/* compute J portion of multiplier */
jval = fsref / (aic26->mclk / 2048);
/* compute fractional DDDD component of multiplier */
dval = fsref - (jval * (aic26->mclk / 2048));
dval = (10000 * dval) / (aic26->mclk / 2048);
dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
qval = 0;
reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
snd_soc_write(codec, AIC26_REG_PLL_PROG1, reg);
reg = dval << 2;
snd_soc_write(codec, AIC26_REG_PLL_PROG2, reg);
/* Audio Control 3 (master mode, fsref rate) */
reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL3);
reg &= ~0xf800;
if (aic26->master)
reg |= 0x0800;
if (fsref == 48000)
reg |= 0x2000;
snd_soc_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
/* Audio Control 1 (FSref divisor) */
reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL1);
reg &= ~0x0fff;
reg |= wlen | aic26->datfm | (divisor << 3) | divisor;
snd_soc_write(codec, AIC26_REG_AUDIO_CTRL1, reg);
return 0;
}
/**
* aic26_mute - Mute control to reduce noise when changing audio format
*/
static int aic26_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
u16 reg = aic26_reg_read_cache(codec, AIC26_REG_DAC_GAIN);
dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
dai, mute);
if (mute)
reg |= 0x8080;
else
reg &= ~0x8080;
snd_soc_write(codec, AIC26_REG_DAC_GAIN, reg);
return 0;
}
static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
" freq=%i, dir=%i)\n",
codec_dai, clk_id, freq, dir);
/* MCLK needs to fall between 2MHz and 50 MHz */
if ((freq < 2000000) || (freq > 50000000))
return -EINVAL;
aic26->mclk = freq;
return 0;
}
static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
codec_dai, fmt);
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
default:
dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break;
case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break;
case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break;
default:
dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
}
return 0;
}
/* ---------------------------------------------------------------------
* Digital Audio Interface Definition
*/
#define AIC26_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 AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
static const struct snd_soc_dai_ops aic26_dai_ops = {
.hw_params = aic26_hw_params,
.digital_mute = aic26_mute,
.set_sysclk = aic26_set_sysclk,
.set_fmt = aic26_set_fmt,
};
static struct snd_soc_dai_driver aic26_dai = {
.name = "tlv320aic26-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = AIC26_RATES,
.formats = AIC26_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = AIC26_RATES,
.formats = AIC26_FORMATS,
},
.ops = &aic26_dai_ops,
};
/* ---------------------------------------------------------------------
* ALSA controls
*/
static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
static const struct soc_enum aic26_capture_src_enum =
SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12, 2, aic26_capture_src_text);
static const struct snd_kcontrol_new aic26_snd_controls[] = {
/* Output */
SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
SOC_ENUM("Capture Source", aic26_capture_src_enum),
};
/* ---------------------------------------------------------------------
* SPI device portion of driver: sysfs files for debugging
*/
static ssize_t aic26_keyclick_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct aic26 *aic26 = dev_get_drvdata(dev);
int val, amp, freq, len;
val = aic26_reg_read_cache(aic26->codec, AIC26_REG_AUDIO_CTRL2);
amp = (val >> 12) & 0x7;
freq = (125 << ((val >> 8) & 0x7)) >> 1;
len = 2 * (1 + ((val >> 4) & 0xf));
return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
}
/* Any write to the keyclick attribute will trigger the keyclick event */
static ssize_t aic26_keyclick_set(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct aic26 *aic26 = dev_get_drvdata(dev);
int val;
val = aic26_reg_read_cache(aic26->codec, AIC26_REG_AUDIO_CTRL2);
val |= 0x8000;
snd_soc_write(aic26->codec, AIC26_REG_AUDIO_CTRL2, val);
return count;
}
static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
/* ---------------------------------------------------------------------
* SoC CODEC portion of driver: probe and release routines
*/
static int aic26_probe(struct snd_soc_codec *codec)
{
struct aic26 *aic26 = dev_get_drvdata(codec->dev);
int ret, err, i, reg;
aic26->codec = codec;
/* Reset the codec to power on defaults */
snd_soc_write(codec, AIC26_REG_RESET, 0xBB00);
/* Power up CODEC */
snd_soc_write(codec, AIC26_REG_POWER_CTRL, 0);
/* Audio Control 3 (master mode, fsref rate) */
reg = snd_soc_read(codec, AIC26_REG_AUDIO_CTRL3);
reg &= ~0xf800;
reg |= 0x0800; /* set master mode */
snd_soc_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
/* Fill register cache */
for (i = 0; i < codec->driver->reg_cache_size; i++)
snd_soc_read(codec, i);
/* Register the sysfs files for debugging */
/* Create SysFS files */
ret = device_create_file(codec->dev, &dev_attr_keyclick);
if (ret)
dev_info(codec->dev, "error creating sysfs files\n");
/* register controls */
dev_dbg(codec->dev, "Registering controls\n");
err = snd_soc_add_codec_controls(codec, aic26_snd_controls,
ARRAY_SIZE(aic26_snd_controls));
WARN_ON(err < 0);
return 0;
}
static struct snd_soc_codec_driver aic26_soc_codec_dev = {
.probe = aic26_probe,
.read = aic26_reg_read,
.write = aic26_reg_write,
.reg_cache_size = AIC26_NUM_REGS,
.reg_word_size = sizeof(u16),
.dapm_widgets = tlv320aic26_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets),
.dapm_routes = tlv320aic26_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes),
};
/* ---------------------------------------------------------------------
* SPI device portion of driver: probe and release routines and SPI
* driver registration.
*/
static int aic26_spi_probe(struct spi_device *spi)
{
struct aic26 *aic26;
int ret;
dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
/* Allocate driver data */
aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL);
if (!aic26)
return -ENOMEM;
/* Initialize the driver data */
aic26->spi = spi;
dev_set_drvdata(&spi->dev, aic26);
aic26->master = 1;
ret = snd_soc_register_codec(&spi->dev,
&aic26_soc_codec_dev, &aic26_dai, 1);
return ret;
}
static int aic26_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static struct spi_driver aic26_spi = {
.driver = {
.name = "tlv320aic26-codec",
.owner = THIS_MODULE,
},
.probe = aic26_spi_probe,
.remove = aic26_spi_remove,
};
module_spi_driver(aic26_spi);
View git blame Copy permalink