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[ALSA] ASoC codecs: WM8731 support 

This patch adds ASoC support for the WM8731 codec.
Supported features:-
 o Capture/Playback/Sidetone/Bypass.
 o 16 & 24 bit audio.
 o 8k - 96k sample rates.
 o DAPM.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Richard Purdie 2006-10-06 18:36:07 +02:00 committed by Jaroslav Kysela
parent eb1a6af39b
commit 40e0aa6466
3 changed files with 831 additions and 0 deletions
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1
include/linux/i2c-id.h
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@ -115,6 +115,7 @@
#define I2C_DRIVERID_KS0127 86 /* Samsung ks0127 video decoder */
#define I2C_DRIVERID_TLV320AIC23B 87 /* TI TLV320AIC23B audio codec */
#define I2C_DRIVERID_ISL1208 88 /* Intersil ISL1208 RTC */
#define I2C_DRIVERID_WM8731 89 /* Wolfson WM8731 audio codec */
#define I2C_DRIVERID_I2CDEV 900
#define I2C_DRIVERID_ARP 902 /* SMBus ARP Client */

789
sound/soc/codecs/wm8731.c Normal file
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@ -0,0 +1,789 @@
/*
* 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 */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_8000, WM8731_DIR, 0,
1536, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_8000, WM8731_DIR, 0,
2304, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_8000, WM8731_DIR, 0,
1408, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_8000, WM8731_DIR, 0,
2112, SND_SOC_FSB(64)},
/* 32k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_32000, WM8731_DIR, 0,
384, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_32000, WM8731_DIR, 0,
576, SND_SOC_FSB(64)},
/* 44.1k & 48k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
WM8731_DIR, 0, 256, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
WM8731_DIR, 0, 384, SND_SOC_FSB(64)},
/* 88.2 & 96k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
WM8731_DIR, 0, 128, SND_SOC_FSB(64)},
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
WM8731_DIR, 0, 192, SND_SOC_FSB(64)},
/* USB codec frame and clock master modes */
/* 8k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_8000, WM8731_DIR,
SND_SOC_DAI_BFS_DIV, 1500, SND_SOC_FSBD(1)},
/* 44.1k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_44100, WM8731_DIR,
SND_SOC_DAI_BFS_DIV, 272, SND_SOC_FSBD(1)},
/* 48k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_48000, WM8731_DIR,
SND_SOC_DAI_BFS_DIV, 250, SND_SOC_FSBD(1)},
/* 88.2k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_88200, WM8731_DIR,
SND_SOC_DAI_BFS_DIV, 136, SND_SOC_FSBD(1)},
/* 96k */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, SNDRV_PCM_RATE_96000, WM8731_DIR,
SND_SOC_DAI_BFS_DIV, 125, SND_SOC_FSBD(1)},
/* codec frame and clock slave modes */
{WM8731_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0),
WM8731_HIFI_BITS, WM8731_RATES, WM8731_DIR, SND_SOC_DAI_BFS_DIV,
SND_SOC_FS_ALL, SND_SOC_FSBD_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("Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 0, 127, 0),
SOC_DOUBLE_R("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");

41
sound/soc/codecs/wm8731.h Normal file
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/*
* wm8731.h -- WM8731 Soc Audio driver
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <richard@openedhand.com>
*
* Based on wm8753.h
*
* 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.
*/
#ifndef _WM8731_H
#define _WM8731_H
/* WM8731 register space */
#define WM8731_LINVOL 0x00
#define WM8731_RINVOL 0x01
#define WM8731_LOUT1V 0x02
#define WM8731_ROUT1V 0x03
#define WM8731_APANA 0x04
#define WM8731_APDIGI 0x05
#define WM8731_PWR 0x06
#define WM8731_IFACE 0x07
#define WM8731_SRATE 0x08
#define WM8731_ACTIVE 0x09
#define WM8731_RESET 0x0f
#define WM8731_CACHEREGNUM 10
struct wm8731_setup_data {
unsigned short i2c_address;
};
extern struct snd_soc_codec_dai wm8731_dai;
extern struct snd_soc_codec_device soc_codec_dev_wm8731;
#endif