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linux/sound/soc/codecs/wm8731.c
Liam Girdwood bd903b6ed7 [ALSA] ASoC - mixer name changes for older OSS app support 
This patch suggested by Richard Purdie changes the names of some WM8731
and WM8750 mixers so that they will be recognised by some older OSS
mixer apps.
Changes:-
 o WM8731 Playback changed to Master Playback
 o WM8750 Out1 changed to Headphone
 o WM8750 Out2 changed to Speaker

Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09 09:01:22 +01:00

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/*
* wm8731.c -- WM8731 ALSA SoC Audio driver
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <richard@openedhand.com>
*
* Based on wm8753.c by Liam Girdwood
*
* 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/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include "wm8731.h"
#define AUDIO_NAME "wm8731"
#define WM8731_VERSION "0.12"
/*
* Debug
*/
#define WM8731_DEBUG 0
#ifdef WM8731_DEBUG
#define dbg(format, arg...) \
printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif
#define err(format, arg...) \
printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
#define info(format, arg...) \
printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
#define warn(format, arg...) \
printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
struct snd_soc_codec_device soc_codec_dev_wm8731;
/*
* wm8731 register cache
* We can't read the WM8731 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 u16 wm8731_reg[WM8731_CACHEREGNUM] = {
0x0097, 0x0097, 0x0079, 0x0079,
0x000a, 0x0008, 0x009f, 0x000a,
0x0000, 0x0000
};
#define WM8731_DAIFMT \
(SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_RIGHT_J | \
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_IB_NF | \
SND_SOC_DAIFMT_IB_IF)
#define WM8731_DIR \
(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
#define WM8731_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 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define WM8731_HIFI_BITS \
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_mode wm8731_modes[] = {
/* codec frame and clock master modes */
/* 8k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_8000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 1536,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_8000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 2304,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_8000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 1408,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_8000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 2112,
.bfs = 64,
},
/* 32k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_32000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 384,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_32000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 576,
.bfs = 64,
},
/* 44.1k & 48k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 256,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 384,
.bfs = 64,
},
/* 88.2 & 96k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 128,
.bfs = 64,
},
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_RATE,
.fs = 192,
.bfs = 64,
},
/* USB codec frame and clock master modes */
/* 8k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_8000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = 1500,
.bfs = SND_SOC_FSBD(1),
},
/* 44.1k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_44100,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = 272,
.bfs = SND_SOC_FSBD(1),
},
/* 48k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_48000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = 250,
.bfs = SND_SOC_FSBD(1),
},
/* 88.2k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_88200,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = 136,
.bfs = SND_SOC_FSBD(1),
},
/* 96k */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = SNDRV_PCM_RATE_96000,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = 125,
.bfs = SND_SOC_FSBD(1),
},
/* codec frame and clock slave modes */
{
.fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
.pcmfmt = WM8731_HIFI_BITS,
.pcmrate = WM8731_RATES,
.pcmdir = WM8731_DIR,
.flags = SND_SOC_DAI_BFS_DIV,
.fs = SND_SOC_FS_ALL,
.bfs = SND_SOC_FSB_ALL,
},
};
/*
* read wm8731 register cache
*/
static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg == WM8731_RESET)
return 0;
if (reg >= WM8731_CACHEREGNUM)
return -1;
return cache[reg];
}
/*
* write wm8731 register cache
*/
static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
u16 reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
if (reg >= WM8731_CACHEREGNUM)
return;
cache[reg] = value;
}
/*
* write to the WM8731 register space
*/
static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
u8 data[2];
/* data is
* D15..D9 WM8731 register offset
* D8...D0 register data
*/
data[0] = (reg << 1) | ((value >> 8) & 0x0001);
data[1] = value & 0x00ff;
wm8731_write_reg_cache (codec, reg, value);
if (codec->hw_write(codec->control_data, data, 2) == 2)
return 0;
else
return -EIO;
}
#define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
static const char *wm8731_input_select[] = {"Line In", "Mic"};
static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
static const struct soc_enum wm8731_enum[] = {
SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
};
static const struct snd_kcontrol_new wm8731_snd_controls[] = {
SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
0, 127, 0),
SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
7, 1, 0),
SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
};
/* add non dapm controls */
static int wm8731_add_controls(struct snd_soc_codec *codec)
{
int err, i;
for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) {
if ((err = snd_ctl_add(codec->card,
snd_soc_cnew(&wm8731_snd_controls[i],codec, NULL))) < 0)
return err;
}
return 0;
}
/* Output Mixer */
static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
};
/* Input mux */
static const struct snd_kcontrol_new wm8731_input_mux_controls =
SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
&wm8731_output_mixer_controls[0],
ARRAY_SIZE(wm8731_output_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("LHPOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("RHPOUT"),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("RLINEIN"),
SND_SOC_DAPM_INPUT("LLINEIN"),
};
static const char *intercon[][3] = {
/* output mixer */
{"Output Mixer", "Line Bypass Switch", "Line Input"},
{"Output Mixer", "HiFi Playback Switch", "DAC"},
{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
/* outputs */
{"RHPOUT", NULL, "Output Mixer"},
{"ROUT", NULL, "Output Mixer"},
{"LHPOUT", NULL, "Output Mixer"},
{"LOUT", NULL, "Output Mixer"},
/* input mux */
{"Input Mux", "Line In", "Line Input"},
{"Input Mux", "Mic", "Mic Bias"},
{"ADC", NULL, "Input Mux"},
/* inputs */
{"Line Input", NULL, "LLINEIN"},
{"Line Input", NULL, "RLINEIN"},
{"Mic Bias", NULL, "MICIN"},
/* terminator */
{NULL, NULL, NULL},
};
static int wm8731_add_widgets(struct snd_soc_codec *codec)
{
int i;
for(i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
}
/* set up audio path interconnects */
for(i = 0; intercon[i][0] != NULL; i++) {
snd_soc_dapm_connect_input(codec, intercon[i][0],
intercon[i][1], intercon[i][2]);
}
snd_soc_dapm_new_widgets(codec);
return 0;
}
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},
/* 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;
}
/* WM8731 supports numerous clocks per sample rate */
static unsigned int wm8731_config_sysclk(struct snd_soc_codec_dai *dai,
struct snd_soc_clock_info *info, unsigned int clk)
{
dai->mclk = 0;
/* check that the calculated FS and rate actually match a clock from
* the machine driver */
if (info->fs * info->rate == clk)
dai->mclk = clk;
return dai->mclk;
}
static int wm8731_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->codec;
u16 iface = 0, srate;
int i = get_coeff(rtd->codec_dai->mclk,
snd_soc_get_rate(rtd->codec_dai->dai_runtime.pcmrate));
/* set master/slave audio interface */
switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iface |= 0x0040;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
}
srate = (coeff_div[i].sr << 2) |
(coeff_div[i].bosr << 1) | coeff_div[i].usb;
wm8731_write(codec, WM8731_SRATE, srate);
/* interface format */
switch (rtd->codec_dai->dai_runtime.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;
}
/* bit size */
switch (rtd->codec_dai->dai_runtime.pcmfmt) {
case SNDRV_PCM_FMTBIT_S16_LE:
break;
case SNDRV_PCM_FMTBIT_S20_3LE:
iface |= 0x0004;
break;
case SNDRV_PCM_FMTBIT_S24_LE:
iface |= 0x0008;
break;
case SNDRV_PCM_FMTBIT_S32_LE:
iface |= 0x000c;
break;
}
/* clock inversion */
switch (rtd->codec_dai->dai_runtime.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;
}
/* set iface */
wm8731_write(codec, WM8731_IFACE, iface);
/* set active */
wm8731_write(codec, WM8731_ACTIVE, 0x0001);
return 0;
}
static void wm8731_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->codec;
/* deactivate */
if (!codec->active) {
udelay(50);
wm8731_write(codec, WM8731_ACTIVE, 0x0);
}
}
static int wm8731_mute(struct snd_soc_codec *codec,
struct snd_soc_codec_dai *dai, int mute)
{
u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
if (mute)
wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
else
wm8731_write(codec, WM8731_APDIGI, mute_reg);
return 0;
}
static int wm8731_dapm_event(struct snd_soc_codec *codec, int event)
{
u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
switch (event) {
case SNDRV_CTL_POWER_D0: /* full On */
/* vref/mid, osc on, dac unmute */
wm8731_write(codec, WM8731_PWR, reg);
break;
case SNDRV_CTL_POWER_D1: /* partial On */
case SNDRV_CTL_POWER_D2: /* partial On */
break;
case SNDRV_CTL_POWER_D3hot: /* Off, with power */
/* everything off except vref/vmid, */
wm8731_write(codec, WM8731_PWR, reg | 0x0040);
break;
case SNDRV_CTL_POWER_D3cold: /* Off, without power */
/* everything off, dac mute, inactive */
wm8731_write(codec, WM8731_ACTIVE, 0x0);
wm8731_write(codec, WM8731_PWR, 0xffff);
break;
}
codec->dapm_state = event;
return 0;
}
struct snd_soc_codec_dai wm8731_dai = {
.name = "WM8731",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
},
.config_sysclk = wm8731_config_sysclk,
.digital_mute = wm8731_mute,
.ops = {
.prepare = wm8731_pcm_prepare,
.shutdown = wm8731_shutdown,
},
.caps = {
.num_modes = ARRAY_SIZE(wm8731_modes),
.mode = wm8731_modes,
},
};
EXPORT_SYMBOL_GPL(wm8731_dai);
static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
wm8731_write(codec, WM8731_ACTIVE, 0x0);
wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
return 0;
}
static int wm8731_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
int i;
u8 data[2];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
wm8731_dapm_event(codec, codec->suspend_dapm_state);
return 0;
}
/*
* initialise the WM8731 driver
* register the mixer and dsp interfaces with the kernel
*/
static int wm8731_init(struct snd_soc_device *socdev)
{
struct snd_soc_codec *codec = socdev->codec;
int reg, ret = 0;
codec->name = "WM8731";
codec->owner = THIS_MODULE;
codec->read = wm8731_read_reg_cache;
codec->write = wm8731_write;
codec->dapm_event = wm8731_dapm_event;
codec->dai = &wm8731_dai;
codec->num_dai = 1;
codec->reg_cache_size = ARRAY_SIZE(wm8731_reg);
codec->reg_cache =
kzalloc(sizeof(u16) * ARRAY_SIZE(wm8731_reg), GFP_KERNEL);
if (codec->reg_cache == NULL)
return -ENOMEM;
memcpy(codec->reg_cache,
wm8731_reg, sizeof(u16) * ARRAY_SIZE(wm8731_reg));
codec->reg_cache_size = sizeof(u16) * ARRAY_SIZE(wm8731_reg);
wm8731_reset(codec);
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
kfree(codec->reg_cache);
return ret;
}
/* power on device */
wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
/* set the update bits */
reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
wm8731_write(codec, WM8731_LOUT1V, reg | 0x0100);
reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
wm8731_write(codec, WM8731_ROUT1V, reg | 0x0100);
reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
wm8731_write(codec, WM8731_LINVOL, reg | 0x0100);
reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
wm8731_write(codec, WM8731_RINVOL, reg | 0x0100);
wm8731_add_controls(codec);
wm8731_add_widgets(codec);
ret = snd_soc_register_card(socdev);
if (ret < 0) {
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
}
return ret;
}
static struct snd_soc_device *wm8731_socdev;
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
/*
* WM8731 2 wire address is determined by GPIO5
* state during powerup.
* low = 0x1a
* high = 0x1b
*/
static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
/* Magic definition of all other variables and things */
I2C_CLIENT_INSMOD;
static struct i2c_driver wm8731_i2c_driver;
static struct i2c_client client_template;
/* If the i2c layer weren't so broken, we could pass this kind of data
around */
static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind)
{
struct snd_soc_device *socdev = wm8731_socdev;
struct wm8731_setup_data *setup = socdev->codec_data;
struct snd_soc_codec *codec = socdev->codec;
struct i2c_client *i2c;
int ret;
if (addr != setup->i2c_address)
return -ENODEV;
client_template.adapter = adap;
client_template.addr = addr;
i2c = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (i2c == NULL) {
kfree(codec);
return -ENOMEM;
}
memcpy(i2c, &client_template, sizeof(struct i2c_client));
i2c_set_clientdata(i2c, codec);
codec->control_data = i2c;
ret = i2c_attach_client(i2c);
if (ret < 0) {
err("failed to attach codec at addr %x\n", addr);
goto err;
}
ret = wm8731_init(socdev);
if (ret < 0) {
err("failed to initialise WM8731\n");
goto err;
}
return ret;
err:
kfree(codec);
kfree(i2c);
return ret;
}
static int wm8731_i2c_detach(struct i2c_client *client)
{
struct snd_soc_codec* codec = i2c_get_clientdata(client);
i2c_detach_client(client);
kfree(codec->reg_cache);
kfree(client);
return 0;
}
static int wm8731_i2c_attach(struct i2c_adapter *adap)
{
return i2c_probe(adap, &addr_data, wm8731_codec_probe);
}
/* corgi i2c codec control layer */
static struct i2c_driver wm8731_i2c_driver = {
.driver = {
.name = "WM8731 I2C Codec",
.owner = THIS_MODULE,
},
.id = I2C_DRIVERID_WM8731,
.attach_adapter = wm8731_i2c_attach,
.detach_client = wm8731_i2c_detach,
.command = NULL,
};
static struct i2c_client client_template = {
.name = "WM8731",
.driver = &wm8731_i2c_driver,
};
#endif
static int wm8731_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct wm8731_setup_data *setup;
struct snd_soc_codec *codec;
int ret = 0;
info("WM8731 Audio Codec %s", WM8731_VERSION);
setup = socdev->codec_data;
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
socdev->codec = codec;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
wm8731_socdev = socdev;
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
if (setup->i2c_address) {
normal_i2c[0] = setup->i2c_address;
codec->hw_write = (hw_write_t)i2c_master_send;
ret = i2c_add_driver(&wm8731_i2c_driver);
if (ret != 0)
printk(KERN_ERR "can't add i2c driver");
}
#else
/* Add other interfaces here */
#endif
return ret;
}
/* power down chip */
static int wm8731_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
if (codec->control_data)
wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
i2c_del_driver(&wm8731_i2c_driver);
#endif
kfree(codec);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_wm8731 = {
.probe = wm8731_probe,
.remove = wm8731_remove,
.suspend = wm8731_suspend,
.resume = wm8731_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
MODULE_DESCRIPTION("ASoC WM8731 driver");
MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
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