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linux-stable/sound/soc/codecs/wm8741.c
Lars-Peter Clausen 85e7652d89 ASoC: Constify snd_soc_dai_ops structs 
Commit 1ee46ebd("ASoC: Make the DAI ops constant in the DAI structure")
introduced the possibility to have constant DAI ops structures, yet this is
barley used in both existing drivers and also new drivers being submitted,
although none of them modifies its DAI ops structure. The later is not
surprising since existing drivers are often used as templates for new drivers.
So this patch just constifies all existing snd_soc_dai_ops structs to eliminate
the issue altogether.

The patch was generated with the following coccinelle semantic patch:
// <smpl>
@@
identifier ops;
@@
-struct snd_soc_dai_ops ops =
+const struct snd_soc_dai_ops ops =
{ ... };
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-11-23 10:40:46 +00:00

623 lines
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/*
* wm8741.c -- WM8741 ALSA SoC Audio driver
*
* Copyright 2010 Wolfson Microelectronics plc
*
* Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8741.h"
#define WM8741_NUM_SUPPLIES 2
static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
"AVDD",
"DVDD",
};
#define WM8741_NUM_RATES 6
/* codec private data */
struct wm8741_priv {
enum snd_soc_control_type control_type;
struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
unsigned int sysclk;
struct snd_pcm_hw_constraint_list *sysclk_constraints;
};
static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
0x0000, /* R0 - DACLLSB Attenuation */
0x0000, /* R1 - DACLMSB Attenuation */
0x0000, /* R2 - DACRLSB Attenuation */
0x0000, /* R3 - DACRMSB Attenuation */
0x0000, /* R4 - Volume Control */
0x000A, /* R5 - Format Control */
0x0000, /* R6 - Filter Control */
0x0000, /* R7 - Mode Control 1 */
0x0002, /* R8 - Mode Control 2 */
0x0000, /* R9 - Reset */
0x0002, /* R32 - ADDITONAL_CONTROL_1 */
};
static int wm8741_reset(struct snd_soc_codec *codec)
{
return snd_soc_write(codec, WM8741_RESET, 0);
}
static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
static const struct snd_kcontrol_new wm8741_snd_controls[] = {
SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
};
static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTLP"),
SND_SOC_DAPM_OUTPUT("VOUTLN"),
SND_SOC_DAPM_OUTPUT("VOUTRP"),
SND_SOC_DAPM_OUTPUT("VOUTRN"),
};
static const struct snd_soc_dapm_route intercon[] = {
{ "VOUTLP", NULL, "DACL" },
{ "VOUTLN", NULL, "DACL" },
{ "VOUTRP", NULL, "DACR" },
{ "VOUTRN", NULL, "DACR" },
};
static int wm8741_add_widgets(struct snd_soc_codec *codec)
{
struct snd_soc_dapm_context *dapm = &codec->dapm;
snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
ARRAY_SIZE(wm8741_dapm_widgets));
snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
return 0;
}
static struct {
int value;
int ratio;
} lrclk_ratios[WM8741_NUM_RATES] = {
{ 1, 128 },
{ 2, 192 },
{ 3, 256 },
{ 4, 384 },
{ 5, 512 },
{ 6, 768 },
};
static unsigned int rates_11289[] = {
44100, 88235,
};
static struct snd_pcm_hw_constraint_list constraints_11289 = {
.count = ARRAY_SIZE(rates_11289),
.list = rates_11289,
};
static unsigned int rates_12288[] = {
32000, 48000, 96000,
};
static struct snd_pcm_hw_constraint_list constraints_12288 = {
.count = ARRAY_SIZE(rates_12288),
.list = rates_12288,
};
static unsigned int rates_16384[] = {
32000,
};
static struct snd_pcm_hw_constraint_list constraints_16384 = {
.count = ARRAY_SIZE(rates_16384),
.list = rates_16384,
};
static unsigned int rates_16934[] = {
44100, 88235,
};
static struct snd_pcm_hw_constraint_list constraints_16934 = {
.count = ARRAY_SIZE(rates_16934),
.list = rates_16934,
};
static unsigned int rates_18432[] = {
48000, 96000,
};
static struct snd_pcm_hw_constraint_list constraints_18432 = {
.count = ARRAY_SIZE(rates_18432),
.list = rates_18432,
};
static unsigned int rates_22579[] = {
44100, 88235, 1764000
};
static struct snd_pcm_hw_constraint_list constraints_22579 = {
.count = ARRAY_SIZE(rates_22579),
.list = rates_22579,
};
static unsigned int rates_24576[] = {
32000, 48000, 96000, 192000
};
static struct snd_pcm_hw_constraint_list constraints_24576 = {
.count = ARRAY_SIZE(rates_24576),
.list = rates_24576,
};
static unsigned int rates_36864[] = {
48000, 96000, 19200
};
static struct snd_pcm_hw_constraint_list constraints_36864 = {
.count = ARRAY_SIZE(rates_36864),
.list = rates_36864,
};
static int wm8741_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
/* The set of sample rates that can be supported depends on the
* MCLK supplied to the CODEC - enforce this.
*/
if (!wm8741->sysclk) {
dev_err(codec->dev,
"No MCLK configured, call set_sysclk() on init\n");
return -EINVAL;
}
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
wm8741->sysclk_constraints);
return 0;
}
static int wm8741_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
int i;
/* Find a supported LRCLK ratio */
for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
if (wm8741->sysclk / params_rate(params) ==
lrclk_ratios[i].ratio)
break;
}
/* Should never happen, should be handled by constraints */
if (i == ARRAY_SIZE(lrclk_ratios)) {
dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
wm8741->sysclk / params_rate(params));
return -EINVAL;
}
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x0001;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x0002;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x0003;
break;
default:
dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
params_format(params));
return -EINVAL;
}
dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
params_format(params));
snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
return 0;
}
static int wm8741_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 wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
switch (freq) {
case 11289600:
wm8741->sysclk_constraints = &constraints_11289;
wm8741->sysclk = freq;
return 0;
case 12288000:
wm8741->sysclk_constraints = &constraints_12288;
wm8741->sysclk = freq;
return 0;
case 16384000:
wm8741->sysclk_constraints = &constraints_16384;
wm8741->sysclk = freq;
return 0;
case 16934400:
wm8741->sysclk_constraints = &constraints_16934;
wm8741->sysclk = freq;
return 0;
case 18432000:
wm8741->sysclk_constraints = &constraints_18432;
wm8741->sysclk = freq;
return 0;
case 22579200:
case 33868800:
wm8741->sysclk_constraints = &constraints_22579;
wm8741->sysclk = freq;
return 0;
case 24576000:
wm8741->sysclk_constraints = &constraints_24576;
wm8741->sysclk = freq;
return 0;
case 36864000:
wm8741->sysclk_constraints = &constraints_36864;
wm8741->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
/* check master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 0x0008;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0004;
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x000C;
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= 0x001C;
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:
iface |= 0x0010;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x0020;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x0030;
break;
default:
return -EINVAL;
}
dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
fmt & SND_SOC_DAIFMT_FORMAT_MASK,
((fmt & SND_SOC_DAIFMT_INV_MASK)));
snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
return 0;
}
#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
SNDRV_PCM_RATE_192000)
#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops wm8741_dai_ops = {
.startup = wm8741_startup,
.hw_params = wm8741_hw_params,
.set_sysclk = wm8741_set_dai_sysclk,
.set_fmt = wm8741_set_dai_fmt,
};
static struct snd_soc_dai_driver wm8741_dai = {
.name = "wm8741",
.playback = {
.stream_name = "Playback",
.channels_min = 2, /* Mono modes not yet supported */
.channels_max = 2,
.rates = WM8741_RATES,
.formats = WM8741_FORMATS,
},
.ops = &wm8741_dai_ops,
};
#ifdef CONFIG_PM
static int wm8741_resume(struct snd_soc_codec *codec)
{
snd_soc_cache_sync(codec);
return 0;
}
#else
#define wm8741_suspend NULL
#define wm8741_resume NULL
#endif
static int wm8741_probe(struct snd_soc_codec *codec)
{
struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
int ret = 0;
int i;
for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
wm8741->supplies[i].supply = wm8741_supply_names[i];
ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies),
wm8741->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
goto err;
}
ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
wm8741->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
goto err_get;
}
ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
if (ret != 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
goto err_enable;
}
ret = wm8741_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
goto err_enable;
}
/* Change some default settings - latch VU */
snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
WM8741_UPDATELL, WM8741_UPDATELL);
snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
WM8741_UPDATELM, WM8741_UPDATELM);
snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
WM8741_UPDATERL, WM8741_UPDATERL);
snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
WM8741_UPDATERM, WM8741_UPDATERM);
snd_soc_add_controls(codec, wm8741_snd_controls,
ARRAY_SIZE(wm8741_snd_controls));
wm8741_add_widgets(codec);
dev_dbg(codec->dev, "Successful registration\n");
return ret;
err_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err_get:
regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err:
return ret;
}
static int wm8741_remove(struct snd_soc_codec *codec)
{
struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
.probe = wm8741_probe,
.remove = wm8741_remove,
.resume = wm8741_resume,
.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8741_reg_defaults,
};
static const struct of_device_id wm8741_of_match[] = {
{ .compatible = "wlf,wm8741", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8741_of_match);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static int wm8741_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8741_priv *wm8741;
int ret;
wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
if (wm8741 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, wm8741);
wm8741->control_type = SND_SOC_I2C;
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8741, &wm8741_dai, 1);
if (ret != 0)
goto err;
return ret;
err:
kfree(wm8741);
return ret;
}
static int wm8741_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 wm8741_i2c_id[] = {
{ "wm8741", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
static struct i2c_driver wm8741_i2c_driver = {
.driver = {
.name = "wm8741",
.owner = THIS_MODULE,
.of_match_table = wm8741_of_match,
},
.probe = wm8741_i2c_probe,
.remove = wm8741_i2c_remove,
.id_table = wm8741_i2c_id,
};
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8741_spi_probe(struct spi_device *spi)
{
struct wm8741_priv *wm8741;
int ret;
wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
if (wm8741 == NULL)
return -ENOMEM;
wm8741->control_type = SND_SOC_SPI;
spi_set_drvdata(spi, wm8741);
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_wm8741, &wm8741_dai, 1);
if (ret < 0)
kfree(wm8741);
return ret;
}
static int __devexit wm8741_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
kfree(spi_get_drvdata(spi));
return 0;
}
static struct spi_driver wm8741_spi_driver = {
.driver = {
.name = "wm8741",
.owner = THIS_MODULE,
.of_match_table = wm8741_of_match,
},
.probe = wm8741_spi_probe,
.remove = __devexit_p(wm8741_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */
static int __init wm8741_modinit(void)
{
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&wm8741_i2c_driver);
if (ret != 0)
pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8741_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(wm8741_modinit);
static void __exit wm8741_exit(void)
{
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8741_spi_driver);
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&wm8741_i2c_driver);
#endif
}
module_exit(wm8741_exit);
MODULE_DESCRIPTION("ASoC WM8741 driver");
MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
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