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linux/sound/soc/codecs/adau1701.c
Daniel Mack f724ba3b07 ASoC: codecs: adau1701: factor out firmware reset 
Some runtime-determined constraints might need to be satisfied prior to
firmware loading, so the actual download and releasing the device from
reset has to be postponed. Factor it out first, so we have everything at
one place.

This also changes the behaviour in a way that adau1701_i2c_probe() will
assert the reset line, and wait for the codec probe to release it.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-06-12 16:21:27 +01:00

593 lines
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/*
* Driver for ADAU1701 SigmaDSP processor
*
* Copyright 2011 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
* based on an inital version by Cliff Cai <cliff.cai@analog.com>
*
* Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "sigmadsp.h"
#include "adau1701.h"
#define ADAU1701_DSPCTRL 0x1c
#define ADAU1701_SEROCTL 0x1e
#define ADAU1701_SERICTL 0x1f
#define ADAU1701_AUXNPOW 0x22
#define ADAU1701_OSCIPOW 0x26
#define ADAU1701_DACSET 0x27
#define ADAU1701_NUM_REGS 0x28
#define ADAU1701_DSPCTRL_CR (1 << 2)
#define ADAU1701_DSPCTRL_DAM (1 << 3)
#define ADAU1701_DSPCTRL_ADM (1 << 4)
#define ADAU1701_DSPCTRL_SR_48 0x00
#define ADAU1701_DSPCTRL_SR_96 0x01
#define ADAU1701_DSPCTRL_SR_192 0x02
#define ADAU1701_DSPCTRL_SR_MASK 0x03
#define ADAU1701_SEROCTL_INV_LRCLK 0x2000
#define ADAU1701_SEROCTL_INV_BCLK 0x1000
#define ADAU1701_SEROCTL_MASTER 0x0800
#define ADAU1701_SEROCTL_OBF16 0x0000
#define ADAU1701_SEROCTL_OBF8 0x0200
#define ADAU1701_SEROCTL_OBF4 0x0400
#define ADAU1701_SEROCTL_OBF2 0x0600
#define ADAU1701_SEROCTL_OBF_MASK 0x0600
#define ADAU1701_SEROCTL_OLF1024 0x0000
#define ADAU1701_SEROCTL_OLF512 0x0080
#define ADAU1701_SEROCTL_OLF256 0x0100
#define ADAU1701_SEROCTL_OLF_MASK 0x0180
#define ADAU1701_SEROCTL_MSB_DEALY1 0x0000
#define ADAU1701_SEROCTL_MSB_DEALY0 0x0004
#define ADAU1701_SEROCTL_MSB_DEALY8 0x0008
#define ADAU1701_SEROCTL_MSB_DEALY12 0x000c
#define ADAU1701_SEROCTL_MSB_DEALY16 0x0010
#define ADAU1701_SEROCTL_MSB_DEALY_MASK 0x001c
#define ADAU1701_SEROCTL_WORD_LEN_24 0x0000
#define ADAU1701_SEROCTL_WORD_LEN_20 0x0001
#define ADAU1701_SEROCTL_WORD_LEN_16 0x0010
#define ADAU1701_SEROCTL_WORD_LEN_MASK 0x0003
#define ADAU1701_AUXNPOW_VBPD 0x40
#define ADAU1701_AUXNPOW_VRPD 0x20
#define ADAU1701_SERICTL_I2S 0
#define ADAU1701_SERICTL_LEFTJ 1
#define ADAU1701_SERICTL_TDM 2
#define ADAU1701_SERICTL_RIGHTJ_24 3
#define ADAU1701_SERICTL_RIGHTJ_20 4
#define ADAU1701_SERICTL_RIGHTJ_18 5
#define ADAU1701_SERICTL_RIGHTJ_16 6
#define ADAU1701_SERICTL_MODE_MASK 7
#define ADAU1701_SERICTL_INV_BCLK BIT(3)
#define ADAU1701_SERICTL_INV_LRCLK BIT(4)
#define ADAU1701_OSCIPOW_OPD 0x04
#define ADAU1701_DACSET_DACINIT 1
#define ADAU1701_FIRMWARE "adau1701.bin"
struct adau1701 {
int gpio_nreset;
unsigned int dai_fmt;
};
static const struct snd_kcontrol_new adau1701_controls[] = {
SOC_SINGLE("Master Capture Switch", ADAU1701_DSPCTRL, 4, 1, 0),
};
static const struct snd_soc_dapm_widget adau1701_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC0", "Playback", ADAU1701_AUXNPOW, 3, 1),
SND_SOC_DAPM_DAC("DAC1", "Playback", ADAU1701_AUXNPOW, 2, 1),
SND_SOC_DAPM_DAC("DAC2", "Playback", ADAU1701_AUXNPOW, 1, 1),
SND_SOC_DAPM_DAC("DAC3", "Playback", ADAU1701_AUXNPOW, 0, 1),
SND_SOC_DAPM_ADC("ADC", "Capture", ADAU1701_AUXNPOW, 7, 1),
SND_SOC_DAPM_OUTPUT("OUT0"),
SND_SOC_DAPM_OUTPUT("OUT1"),
SND_SOC_DAPM_OUTPUT("OUT2"),
SND_SOC_DAPM_OUTPUT("OUT3"),
SND_SOC_DAPM_INPUT("IN0"),
SND_SOC_DAPM_INPUT("IN1"),
};
static const struct snd_soc_dapm_route adau1701_dapm_routes[] = {
{ "OUT0", NULL, "DAC0" },
{ "OUT1", NULL, "DAC1" },
{ "OUT2", NULL, "DAC2" },
{ "OUT3", NULL, "DAC3" },
{ "ADC", NULL, "IN0" },
{ "ADC", NULL, "IN1" },
};
static unsigned int adau1701_register_size(struct snd_soc_codec *codec,
unsigned int reg)
{
switch (reg) {
case ADAU1701_DSPCTRL:
case ADAU1701_SEROCTL:
case ADAU1701_AUXNPOW:
case ADAU1701_OSCIPOW:
case ADAU1701_DACSET:
return 2;
case ADAU1701_SERICTL:
return 1;
}
dev_err(codec->dev, "Unsupported register address: %d\n", reg);
return 0;
}
static int adau1701_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
unsigned int i;
unsigned int size;
uint8_t buf[4];
int ret;
size = adau1701_register_size(codec, reg);
if (size == 0)
return -EINVAL;
snd_soc_cache_write(codec, reg, value);
buf[0] = 0x08;
buf[1] = reg;
for (i = size + 1; i >= 2; --i) {
buf[i] = value;
value >>= 8;
}
ret = i2c_master_send(to_i2c_client(codec->dev), buf, size + 2);
if (ret == size + 2)
return 0;
else if (ret < 0)
return ret;
else
return -EIO;
}
static unsigned int adau1701_read(struct snd_soc_codec *codec, unsigned int reg)
{
unsigned int value;
unsigned int ret;
ret = snd_soc_cache_read(codec, reg, &value);
if (ret)
return ret;
return value;
}
static void adau1701_reset(struct snd_soc_codec *codec)
{
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
if (!gpio_is_valid(adau1701->gpio_nreset))
return;
gpio_set_value(adau1701->gpio_nreset, 0);
/* minimum reset time is 20ns */
udelay(1);
gpio_set_value(adau1701->gpio_nreset, 1);
/* power-up time may be as long as 85ms */
mdelay(85);
}
static int adau1701_init(struct snd_soc_codec *codec)
{
int ret;
struct i2c_client *client = to_i2c_client(codec->dev);
adau1701_reset(codec);
ret = process_sigma_firmware(client, ADAU1701_FIRMWARE);
if (ret) {
dev_warn(codec->dev, "Failed to load firmware\n");
return ret;
}
snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT);
return 0;
}
static int adau1701_set_capture_pcm_format(struct snd_soc_codec *codec,
snd_pcm_format_t format)
{
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
unsigned int mask = ADAU1701_SEROCTL_WORD_LEN_MASK;
unsigned int val;
switch (format) {
case SNDRV_PCM_FORMAT_S16_LE:
val = ADAU1701_SEROCTL_WORD_LEN_16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val = ADAU1701_SEROCTL_WORD_LEN_20;
break;
case SNDRV_PCM_FORMAT_S24_LE:
val = ADAU1701_SEROCTL_WORD_LEN_24;
break;
default:
return -EINVAL;
}
if (adau1701->dai_fmt == SND_SOC_DAIFMT_RIGHT_J) {
switch (format) {
case SNDRV_PCM_FORMAT_S16_LE:
val |= ADAU1701_SEROCTL_MSB_DEALY16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val |= ADAU1701_SEROCTL_MSB_DEALY12;
break;
case SNDRV_PCM_FORMAT_S24_LE:
val |= ADAU1701_SEROCTL_MSB_DEALY8;
break;
}
mask |= ADAU1701_SEROCTL_MSB_DEALY_MASK;
}
snd_soc_update_bits(codec, ADAU1701_SEROCTL, mask, val);
return 0;
}
static int adau1701_set_playback_pcm_format(struct snd_soc_codec *codec,
snd_pcm_format_t format)
{
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
unsigned int val;
if (adau1701->dai_fmt != SND_SOC_DAIFMT_RIGHT_J)
return 0;
switch (format) {
case SNDRV_PCM_FORMAT_S16_LE:
val = ADAU1701_SERICTL_RIGHTJ_16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val = ADAU1701_SERICTL_RIGHTJ_20;
break;
case SNDRV_PCM_FORMAT_S24_LE:
val = ADAU1701_SERICTL_RIGHTJ_24;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, ADAU1701_SERICTL,
ADAU1701_SERICTL_MODE_MASK, val);
return 0;
}
static int adau1701_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;
snd_pcm_format_t format;
unsigned int val;
switch (params_rate(params)) {
case 192000:
val = ADAU1701_DSPCTRL_SR_192;
break;
case 96000:
val = ADAU1701_DSPCTRL_SR_96;
break;
case 48000:
val = ADAU1701_DSPCTRL_SR_48;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, ADAU1701_DSPCTRL,
ADAU1701_DSPCTRL_SR_MASK, val);
format = params_format(params);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return adau1701_set_playback_pcm_format(codec, format);
else
return adau1701_set_capture_pcm_format(codec, format);
}
static int adau1701_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
unsigned int serictl = 0x00, seroctl = 0x00;
bool invert_lrclk;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
/* master, 64-bits per sample, 1 frame per sample */
seroctl |= ADAU1701_SEROCTL_MASTER | ADAU1701_SEROCTL_OBF16
| ADAU1701_SEROCTL_OLF1024;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
invert_lrclk = false;
break;
case SND_SOC_DAIFMT_NB_IF:
invert_lrclk = true;
break;
case SND_SOC_DAIFMT_IB_NF:
invert_lrclk = false;
serictl |= ADAU1701_SERICTL_INV_BCLK;
seroctl |= ADAU1701_SEROCTL_INV_BCLK;
break;
case SND_SOC_DAIFMT_IB_IF:
invert_lrclk = true;
serictl |= ADAU1701_SERICTL_INV_BCLK;
seroctl |= ADAU1701_SEROCTL_INV_BCLK;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
break;
case SND_SOC_DAIFMT_LEFT_J:
serictl |= ADAU1701_SERICTL_LEFTJ;
seroctl |= ADAU1701_SEROCTL_MSB_DEALY0;
invert_lrclk = !invert_lrclk;
break;
case SND_SOC_DAIFMT_RIGHT_J:
serictl |= ADAU1701_SERICTL_RIGHTJ_24;
seroctl |= ADAU1701_SEROCTL_MSB_DEALY8;
invert_lrclk = !invert_lrclk;
break;
default:
return -EINVAL;
}
if (invert_lrclk) {
seroctl |= ADAU1701_SEROCTL_INV_LRCLK;
serictl |= ADAU1701_SERICTL_INV_LRCLK;
}
adau1701->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
snd_soc_write(codec, ADAU1701_SERICTL, serictl);
snd_soc_update_bits(codec, ADAU1701_SEROCTL,
~ADAU1701_SEROCTL_WORD_LEN_MASK, seroctl);
return 0;
}
static int adau1701_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
unsigned int mask = ADAU1701_AUXNPOW_VBPD | ADAU1701_AUXNPOW_VRPD;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
/* Enable VREF and VREF buffer */
snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, 0x00);
break;
case SND_SOC_BIAS_OFF:
/* Disable VREF and VREF buffer */
snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, mask);
break;
}
codec->dapm.bias_level = level;
return 0;
}
static int adau1701_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
unsigned int mask = ADAU1701_DSPCTRL_DAM;
unsigned int val;
if (mute)
val = 0;
else
val = mask;
snd_soc_update_bits(codec, ADAU1701_DSPCTRL, mask, val);
return 0;
}
static int adau1701_set_sysclk(struct snd_soc_codec *codec, int clk_id,
int source, unsigned int freq, int dir)
{
unsigned int val;
switch (clk_id) {
case ADAU1701_CLK_SRC_OSC:
val = 0x0;
break;
case ADAU1701_CLK_SRC_MCLK:
val = ADAU1701_OSCIPOW_OPD;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, ADAU1701_OSCIPOW, ADAU1701_OSCIPOW_OPD, val);
return 0;
}
#define ADAU1701_RATES (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
SNDRV_PCM_RATE_192000)
#define ADAU1701_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops adau1701_dai_ops = {
.set_fmt = adau1701_set_dai_fmt,
.hw_params = adau1701_hw_params,
.digital_mute = adau1701_digital_mute,
};
static struct snd_soc_dai_driver adau1701_dai = {
.name = "adau1701",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 8,
.rates = ADAU1701_RATES,
.formats = ADAU1701_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 8,
.rates = ADAU1701_RATES,
.formats = ADAU1701_FORMATS,
},
.ops = &adau1701_dai_ops,
.symmetric_rates = 1,
};
#ifdef CONFIG_OF
static const struct of_device_id adau1701_dt_ids[] = {
{ .compatible = "adi,adau1701", },
{ }
};
MODULE_DEVICE_TABLE(of, adau1701_dt_ids);
#endif
static int adau1701_probe(struct snd_soc_codec *codec)
{
int ret;
codec->control_data = to_i2c_client(codec->dev);
ret = adau1701_init(codec);
if (ret)
return ret;
snd_soc_write(codec, ADAU1701_DSPCTRL, ADAU1701_DSPCTRL_CR);
return 0;
}
static struct snd_soc_codec_driver adau1701_codec_drv = {
.probe = adau1701_probe,
.set_bias_level = adau1701_set_bias_level,
.idle_bias_off = true,
.reg_cache_size = ADAU1701_NUM_REGS,
.reg_word_size = sizeof(u16),
.controls = adau1701_controls,
.num_controls = ARRAY_SIZE(adau1701_controls),
.dapm_widgets = adau1701_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(adau1701_dapm_widgets),
.dapm_routes = adau1701_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(adau1701_dapm_routes),
.write = adau1701_write,
.read = adau1701_read,
.set_sysclk = adau1701_set_sysclk,
};
static int adau1701_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adau1701 *adau1701;
struct device *dev = &client->dev;
int gpio_nreset = -EINVAL;
int ret;
adau1701 = devm_kzalloc(dev, sizeof(*adau1701), GFP_KERNEL);
if (!adau1701)
return -ENOMEM;
if (dev->of_node) {
gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
if (gpio_nreset < 0 && gpio_nreset != -ENOENT)
return gpio_nreset;
}
if (gpio_is_valid(gpio_nreset)) {
ret = devm_gpio_request_one(dev, gpio_nreset, GPIOF_OUT_INIT_LOW,
"ADAU1701 Reset");
if (ret < 0)
return ret;
}
adau1701->gpio_nreset = gpio_nreset;
i2c_set_clientdata(client, adau1701);
ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,
&adau1701_dai, 1);
return ret;
}
static int adau1701_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id adau1701_i2c_id[] = {
{ "adau1701", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adau1701_i2c_id);
static struct i2c_driver adau1701_i2c_driver = {
.driver = {
.name = "adau1701",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(adau1701_dt_ids),
},
.probe = adau1701_i2c_probe,
.remove = adau1701_i2c_remove,
.id_table = adau1701_i2c_id,
};
module_i2c_driver(adau1701_i2c_driver);
MODULE_DESCRIPTION("ASoC ADAU1701 SigmaDSP driver");
MODULE_AUTHOR("Cliff Cai <cliff.cai@analog.com>");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");
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