- 根目录:
- sound
- soc
- codecs
- wm8711.c
/*
* wm8711.c -- WM8711 ALSA SoC Audio driver
*
* Copyright 2006 Wolfson Microelectronics
*
* Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
*
* Based on wm8731.c by Richard Purdie
*
* 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/regmap.h>
#include <linux/spi/spi.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/tlv.h>
#include <sound/initval.h>
#include "wm8711.h"
/* codec private data */
struct wm8711_priv {
struct regmap *regmap;
unsigned int sysclk;
};
/*
* wm8711 register cache
* We can't read the WM8711 register space when we are
* using 2 wire for device control, so we cache them instead.
* There is no point in caching the reset register
*/
static const struct reg_default wm8711_reg_defaults[] = {
{ 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
{ 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
};
static bool wm8711_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8711_RESET:
return true;
default:
return false;
}
}
#define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0)
static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
static const struct snd_kcontrol_new wm8711_snd_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
0, 127, 0, out_tlv),
SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
7, 1, 0),
};
/* Output Mixer */
static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
};
static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
&wm8711_output_mixer_controls[0],
ARRAY_SIZE(wm8711_output_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("LHPOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("RHPOUT"),
};
static const struct snd_soc_dapm_route wm8711_intercon[] = {
/* output mixer */
{"Output Mixer", "Line Bypass Switch", "Line Input"},
{"Output Mixer", "HiFi Playback Switch", "DAC"},
/* outputs */
{"RHPOUT", NULL, "Output Mixer"},
{"ROUT", NULL, "Output Mixer"},
{"LHPOUT", NULL, "Output Mixer"},
{"LOUT", NULL, "Output Mixer"},
};
struct _coeff_div {
u32 mclk;
u32 rate;
u16 fs;
u8 sr:4;
u8 bosr:1;
u8 usb:1;
};
/* codec mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
/* 48k */
{12288000, 48000, 256, 0x0, 0x0, 0x0},
{18432000, 48000, 384, 0x0, 0x1, 0x0},
{12000000, 48000, 250, 0x0, 0x0, 0x1},
/* 32k */
{12288000, 32000, 384, 0x6, 0x0, 0x0},
{18432000, 32000, 576, 0x6, 0x1, 0x0},
{12000000, 32000, 375, 0x6, 0x0, 0x1},
/* 8k */
{12288000, 8000, 1536, 0x3, 0x0, 0x0},
{18432000, 8000, 2304, 0x3, 0x1, 0x0},
{11289600, 8000, 1408, 0xb, 0x0, 0x0},
{16934400, 8000, 2112, 0xb, 0x1, 0x0},
{12000000, 8000, 1500, 0x3, 0x0, 0x1},
/* 96k */
{12288000, 96000, 128, 0x7, 0x0, 0x0},
{18432000, 96000, 192, 0x7, 0x1, 0x0},
{12000000, 96000, 125, 0x7, 0x0, 0x1},
/* 44.1k */
{11289600, 44100, 256, 0x8, 0x0, 0x0},
{16934400, 44100, 384, 0x8, 0x1, 0x0},
{12000000, 44100, 272, 0x8, 0x1, 0x1},
/* 88.2k */
{11289600, 88200, 128, 0xf, 0x0, 0x0},
{16934400, 88200, 192, 0xf, 0x1, 0x0},
{12000000, 88200, 136, 0xf, 0x1, 0x1},
};
static inline int get_coeff(int mclk, int rate)
{
int i;
for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
return i;
}
return 0;
}
static int wm8711_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 wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3;
int i = get_coeff(wm8711->sysclk, params_rate(params));
u16 srate = (coeff_div[i].sr << 2) |
(coeff_div[i].bosr << 1) | coeff_div[i].usb;
snd_soc_write(codec, WM8711_SRATE, srate);
/* bit size */
switch (params_width(params)) {
case 16:
break;
case 20:
iface |= 0x0004;
break;
case 24:
iface |= 0x0008;
break;
}
snd_soc_write(codec, WM8711_IFACE, iface);
return 0;
}
static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
/* set active */
snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
return 0;
}
static void wm8711_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
/* deactivate */
if (!snd_soc_codec_is_active(codec)) {
udelay(50);
snd_soc_write(codec, WM8711_ACTIVE, 0x0);
}
}
static int wm8711_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
if (mute)
snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
else
snd_soc_write(codec, WM8711_APDIGI, mute_reg);
return 0;
}
static int wm8711_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 wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
switch (freq) {
case 11289600:
case 12000000:
case 12288000:
case 16934400:
case 18432000:
wm8711->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8711_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, WM8711_IFACE) & 0x000c;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iface |= 0x0040;
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:
iface |= 0x0002;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0001;
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x0003;
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= 0x0013;
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 |= 0x0090;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x0080;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x0010;
break;
default:
return -EINVAL;
}
/* set iface */
snd_soc_write(codec, WM8711_IFACE, iface);
return 0;
}
static int wm8711_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_write(codec, WM8711_PWR, reg);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
regcache_sync(wm8711->regmap);
snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
break;
case SND_SOC_BIAS_OFF:
snd_soc_write(codec, WM8711_ACTIVE, 0x0);
snd_soc_write(codec, WM8711_PWR, 0xffff);
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define WM8711_RATES SNDRV_PCM_RATE_8000_96000
#define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops wm8711_ops = {
.prepare = wm8711_pcm_prepare,
.hw_params = wm8711_hw_params,
.shutdown = wm8711_shutdown,
.digital_mute = wm8711_mute,
.set_sysclk = wm8711_set_dai_sysclk,
.set_fmt = wm8711_set_dai_fmt,
};
static struct snd_soc_dai_driver wm8711_dai = {
.name = "wm8711-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8711_RATES,
.formats = WM8711_FORMATS,
},
.ops = &wm8711_ops,
};
static int wm8711_suspend(struct snd_soc_codec *codec)
{
snd_soc_write(codec, WM8711_ACTIVE, 0x0);
wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8711_resume(struct snd_soc_codec *codec)
{
wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int wm8711_probe(struct snd_soc_codec *codec)
{
int ret;
ret = wm8711_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
return ret;
}
wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Latch the update bits */
snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100);
return ret;
}
/* power down chip */
static int wm8711_remove(struct snd_soc_codec *codec)
{
wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
.probe = wm8711_probe,
.remove = wm8711_remove,
.suspend = wm8711_suspend,
.resume = wm8711_resume,
.set_bias_level = wm8711_set_bias_level,
.controls = wm8711_snd_controls,
.num_controls = ARRAY_SIZE(wm8711_snd_controls),
.dapm_widgets = wm8711_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets),
.dapm_routes = wm8711_intercon,
.num_dapm_routes = ARRAY_SIZE(wm8711_intercon),
};
static const struct of_device_id wm8711_of_match[] = {
{ .compatible = "wlf,wm8711", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8711_of_match);
static const struct regmap_config wm8711_regmap = {
.reg_bits = 7,
.val_bits = 9,
.max_register = WM8711_RESET,
.reg_defaults = wm8711_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
.cache_type = REGCACHE_RBTREE,
.volatile_reg = wm8711_volatile,
};
#if defined(CONFIG_SPI_MASTER)
static int wm8711_spi_probe(struct spi_device *spi)
{
struct wm8711_priv *wm8711;
int ret;
wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
GFP_KERNEL);
if (wm8711 == NULL)
return -ENOMEM;
wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
if (IS_ERR(wm8711->regmap))
return PTR_ERR(wm8711->regmap);
spi_set_drvdata(spi, wm8711);
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_wm8711, &wm8711_dai, 1);
return ret;
}
static int wm8711_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static struct spi_driver wm8711_spi_driver = {
.driver = {
.name = "wm8711",
.owner = THIS_MODULE,
.of_match_table = wm8711_of_match,
},
.probe = wm8711_spi_probe,
.remove = wm8711_spi_remove,
};
#endif /* CONFIG_SPI_MASTER */
#if IS_ENABLED(CONFIG_I2C)
static int wm8711_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct wm8711_priv *wm8711;
int ret;
wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
GFP_KERNEL);
if (wm8711 == NULL)
return -ENOMEM;
wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
if (IS_ERR(wm8711->regmap))
return PTR_ERR(wm8711->regmap);
i2c_set_clientdata(client, wm8711);
ret = snd_soc_register_codec(&client->dev,
&soc_codec_dev_wm8711, &wm8711_dai, 1);
return ret;
}
static int wm8711_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id wm8711_i2c_id[] = {
{ "wm8711", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
static struct i2c_driver wm8711_i2c_driver = {
.driver = {
.name = "wm8711",
.owner = THIS_MODULE,
.of_match_table = wm8711_of_match,
},
.probe = wm8711_i2c_probe,
.remove = wm8711_i2c_remove,
.id_table = wm8711_i2c_id,
};
#endif
static int __init wm8711_modinit(void)
{
int ret;
#if IS_ENABLED(CONFIG_I2C)
ret = i2c_add_driver(&wm8711_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
ret);
}
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8711_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
ret);
}
#endif
return 0;
}
module_init(wm8711_modinit);
static void __exit wm8711_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
i2c_del_driver(&wm8711_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8711_spi_driver);
#endif
}
module_exit(wm8711_exit);
MODULE_DESCRIPTION("ASoC WM8711 driver");
MODULE_AUTHOR("Mike Arthur");
MODULE_LICENSE("GPL");