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linux-stable/sound/soc/codecs/wm8971.c
Mark Brown b2c812e22d ASoC: Add indirection for CODEC private data 
One of the features of the multi CODEC work is that it embeds a struct
device in the CODEC to provide diagnostics via a sysfs class rather than
via the device tree, at which point it's much better to use the struct
device private data rather than having two places to store it. Provide
an accessor function to allow this change to be made more easily, and
update all the CODEC drivers are updated.

To ensure use of the accessor the private data structure member is
renamed, meaning that if code developed with older an older core that
still uses private_data is merged it will fail to build.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-04-17 10:46:22 +09:00

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/*
* wm8971.c -- WM8971 ALSA SoC Audio driver
*
* Copyright 2005 Lab126, Inc.
*
* Author: Kenneth Kiraly <kiraly@lab126.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 as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#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/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 "wm8971.h"
#define WM8971_VERSION "0.9"
#define WM8971_REG_COUNT 43
static struct workqueue_struct *wm8971_workq = NULL;
/* codec private data */
struct wm8971_priv {
unsigned int sysclk;
};
/*
* wm8971 register cache
* We can't read the WM8971 register space when we
* are using 2 wire for device control, so we cache them instead.
*/
static const u16 wm8971_reg[] = {
0x0097, 0x0097, 0x0079, 0x0079, /* 0 */
0x0000, 0x0008, 0x0000, 0x000a, /* 4 */
0x0000, 0x0000, 0x00ff, 0x00ff, /* 8 */
0x000f, 0x000f, 0x0000, 0x0000, /* 12 */
0x0000, 0x007b, 0x0000, 0x0032, /* 16 */
0x0000, 0x00c3, 0x00c3, 0x00c0, /* 20 */
0x0000, 0x0000, 0x0000, 0x0000, /* 24 */
0x0000, 0x0000, 0x0000, 0x0000, /* 28 */
0x0000, 0x0000, 0x0050, 0x0050, /* 32 */
0x0050, 0x0050, 0x0050, 0x0050, /* 36 */
0x0079, 0x0079, 0x0079, /* 40 */
};
#define wm8971_reset(c) snd_soc_write(c, WM8971_RESET, 0)
/* WM8971 Controls */
static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
"200Hz @ 48kHz" };
static const char *wm8971_treble[] = { "8kHz", "4kHz" };
static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
static const char *wm8971_ng_type[] = { "Constant PGA Gain",
"Mute ADC Output" };
static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
"Mono (Right)", "Digital Mono"};
static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
"Differential"};
static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
"Differential"};
static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
"L + R Invert"};
static const struct soc_enum wm8971_enum[] = {
SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass), /* 0 */
SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type), /* 4 */
SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */
SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux),
SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel),
SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel),
SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol), /* 12 */
SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux),
};
static const struct snd_kcontrol_new wm8971_snd_controls[] = {
SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0),
SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL,
6, 1, 0),
SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1),
SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V,
WM8971_ROUT1V, 7, 1, 0),
SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V,
WM8971_ROUT2V, 7, 1, 0),
SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0),
SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0),
SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1,
WM8971_LOUTM2, 4, 7, 1),
SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1,
WM8971_ROUTM2, 4, 7, 1),
SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1,
WM8971_MOUTM2, 4, 7, 1),
SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V,
WM8971_ROUT1V, 0, 127, 0),
SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V,
WM8971_ROUT2V, 0, 127, 0),
SOC_ENUM("Bass Boost", wm8971_enum[0]),
SOC_ENUM("Bass Filter", wm8971_enum[1]),
SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1),
SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0),
SOC_ENUM("Treble Cut-off", wm8971_enum[2]),
SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1),
SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0),
SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0),
SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0),
SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0),
SOC_ENUM("ALC Capture Function", wm8971_enum[3]),
SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0),
SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0),
SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0),
SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0),
SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0),
SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]),
SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0),
SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0),
SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0),
SOC_ENUM("Playback De-emphasis", wm8971_enum[5]),
SOC_ENUM("Playback Function", wm8971_enum[6]),
SOC_ENUM("Playback Phase", wm8971_enum[7]),
SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0),
};
/*
* DAPM Controls
*/
/* Left Mixer */
static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = {
SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0),
};
/* Right Mixer */
static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0),
};
/* Mono Mixer */
static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0),
};
/* Left Line Mux */
static const struct snd_kcontrol_new wm8971_left_line_controls =
SOC_DAPM_ENUM("Route", wm8971_enum[8]);
/* Right Line Mux */
static const struct snd_kcontrol_new wm8971_right_line_controls =
SOC_DAPM_ENUM("Route", wm8971_enum[9]);
/* Left PGA Mux */
static const struct snd_kcontrol_new wm8971_left_pga_controls =
SOC_DAPM_ENUM("Route", wm8971_enum[10]);
/* Right PGA Mux */
static const struct snd_kcontrol_new wm8971_right_pga_controls =
SOC_DAPM_ENUM("Route", wm8971_enum[11]);
/* Mono ADC Mux */
static const struct snd_kcontrol_new wm8971_monomux_controls =
SOC_DAPM_ENUM("Route", wm8971_enum[13]);
static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
&wm8971_left_mixer_controls[0],
ARRAY_SIZE(wm8971_left_mixer_controls)),
SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
&wm8971_right_mixer_controls[0],
ARRAY_SIZE(wm8971_right_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0,
&wm8971_mono_mixer_controls[0],
ARRAY_SIZE(wm8971_mono_mixer_controls)),
SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0),
SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0),
SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0),
SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8971_PWR1, 1, 0),
SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0),
SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0),
SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0,
&wm8971_left_pga_controls),
SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0,
&wm8971_right_pga_controls),
SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
&wm8971_left_line_controls),
SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
&wm8971_right_line_controls),
SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
&wm8971_monomux_controls),
SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
&wm8971_monomux_controls),
SND_SOC_DAPM_OUTPUT("LOUT1"),
SND_SOC_DAPM_OUTPUT("ROUT1"),
SND_SOC_DAPM_OUTPUT("LOUT2"),
SND_SOC_DAPM_OUTPUT("ROUT2"),
SND_SOC_DAPM_OUTPUT("MONO"),
SND_SOC_DAPM_INPUT("LINPUT1"),
SND_SOC_DAPM_INPUT("RINPUT1"),
SND_SOC_DAPM_INPUT("MIC"),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* left mixer */
{"Left Mixer", "Playback Switch", "Left DAC"},
{"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Left Mixer", "Right Playback Switch", "Right DAC"},
{"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
/* right mixer */
{"Right Mixer", "Left Playback Switch", "Left DAC"},
{"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Right Mixer", "Playback Switch", "Right DAC"},
{"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
/* left out 1 */
{"Left Out 1", NULL, "Left Mixer"},
{"LOUT1", NULL, "Left Out 1"},
/* left out 2 */
{"Left Out 2", NULL, "Left Mixer"},
{"LOUT2", NULL, "Left Out 2"},
/* right out 1 */
{"Right Out 1", NULL, "Right Mixer"},
{"ROUT1", NULL, "Right Out 1"},
/* right out 2 */
{"Right Out 2", NULL, "Right Mixer"},
{"ROUT2", NULL, "Right Out 2"},
/* mono mixer */
{"Mono Mixer", "Left Playback Switch", "Left DAC"},
{"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Mono Mixer", "Right Playback Switch", "Right DAC"},
{"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
/* mono out */
{"Mono Out", NULL, "Mono Mixer"},
{"MONO1", NULL, "Mono Out"},
/* Left Line Mux */
{"Left Line Mux", "Line", "LINPUT1"},
{"Left Line Mux", "PGA", "Left PGA Mux"},
{"Left Line Mux", "Differential", "Differential Mux"},
/* Right Line Mux */
{"Right Line Mux", "Line", "RINPUT1"},
{"Right Line Mux", "Mic", "MIC"},
{"Right Line Mux", "PGA", "Right PGA Mux"},
{"Right Line Mux", "Differential", "Differential Mux"},
/* Left PGA Mux */
{"Left PGA Mux", "Line", "LINPUT1"},
{"Left PGA Mux", "Differential", "Differential Mux"},
/* Right PGA Mux */
{"Right PGA Mux", "Line", "RINPUT1"},
{"Right PGA Mux", "Differential", "Differential Mux"},
/* Differential Mux */
{"Differential Mux", "Line", "LINPUT1"},
{"Differential Mux", "Line", "RINPUT1"},
/* Left ADC Mux */
{"Left ADC Mux", "Stereo", "Left PGA Mux"},
{"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
{"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
/* Right ADC Mux */
{"Right ADC Mux", "Stereo", "Right PGA Mux"},
{"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
{"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
/* ADC */
{"Left ADC", NULL, "Left ADC Mux"},
{"Right ADC", NULL, "Right ADC Mux"},
};
static int wm8971_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, wm8971_dapm_widgets,
ARRAY_SIZE(wm8971_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
return 0;
}
struct _coeff_div {
u32 mclk;
u32 rate;
u16 fs;
u8 sr:5;
u8 usb:1;
};
/* codec hifi mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
/* 8k */
{12288000, 8000, 1536, 0x6, 0x0},
{11289600, 8000, 1408, 0x16, 0x0},
{18432000, 8000, 2304, 0x7, 0x0},
{16934400, 8000, 2112, 0x17, 0x0},
{12000000, 8000, 1500, 0x6, 0x1},
/* 11.025k */
{11289600, 11025, 1024, 0x18, 0x0},
{16934400, 11025, 1536, 0x19, 0x0},
{12000000, 11025, 1088, 0x19, 0x1},
/* 16k */
{12288000, 16000, 768, 0xa, 0x0},
{18432000, 16000, 1152, 0xb, 0x0},
{12000000, 16000, 750, 0xa, 0x1},
/* 22.05k */
{11289600, 22050, 512, 0x1a, 0x0},
{16934400, 22050, 768, 0x1b, 0x0},
{12000000, 22050, 544, 0x1b, 0x1},
/* 32k */
{12288000, 32000, 384, 0xc, 0x0},
{18432000, 32000, 576, 0xd, 0x0},
{12000000, 32000, 375, 0xa, 0x1},
/* 44.1k */
{11289600, 44100, 256, 0x10, 0x0},
{16934400, 44100, 384, 0x11, 0x0},
{12000000, 44100, 272, 0x11, 0x1},
/* 48k */
{12288000, 48000, 256, 0x0, 0x0},
{18432000, 48000, 384, 0x1, 0x0},
{12000000, 48000, 250, 0x0, 0x1},
/* 88.2k */
{11289600, 88200, 128, 0x1e, 0x0},
{16934400, 88200, 192, 0x1f, 0x0},
{12000000, 88200, 136, 0x1f, 0x1},
/* 96k */
{12288000, 96000, 128, 0xe, 0x0},
{18432000, 96000, 192, 0xf, 0x0},
{12000000, 96000, 125, 0xe, 0x1},
};
static 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 -EINVAL;
}
static int wm8971_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 wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
switch (freq) {
case 11289600:
case 12000000:
case 12288000:
case 16934400:
case 18432000:
wm8971->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = 0;
/* 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;
}
snd_soc_write(codec, WM8971_IFACE, iface);
return 0;
}
static int wm8971_pcm_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_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
int coeff = get_coeff(wm8971->sysclk, params_rate(params));
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x0004;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x0008;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x000c;
break;
}
/* set iface & srate */
snd_soc_write(codec, WM8971_IFACE, iface);
if (coeff >= 0)
snd_soc_write(codec, WM8971_SRATE, srate |
(coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
return 0;
}
static int wm8971_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8971_ADCDAC) & 0xfff7;
if (mute)
snd_soc_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
else
snd_soc_write(codec, WM8971_ADCDAC, mute_reg);
return 0;
}
static int wm8971_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
switch (level) {
case SND_SOC_BIAS_ON:
/* set vmid to 50k and unmute dac */
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
/* mute dac and set vmid to 500k, enable VREF */
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
break;
case SND_SOC_BIAS_OFF:
snd_soc_write(codec, WM8971_PWR1, 0x0001);
break;
}
codec->bias_level = level;
return 0;
}
#define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static struct snd_soc_dai_ops wm8971_dai_ops = {
.hw_params = wm8971_pcm_hw_params,
.digital_mute = wm8971_mute,
.set_fmt = wm8971_set_dai_fmt,
.set_sysclk = wm8971_set_dai_sysclk,
};
struct snd_soc_dai wm8971_dai = {
.name = "WM8971",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8971_RATES,
.formats = WM8971_FORMATS,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8971_RATES,
.formats = WM8971_FORMATS,},
.ops = &wm8971_dai_ops,
};
EXPORT_SYMBOL_GPL(wm8971_dai);
static void wm8971_work(struct work_struct *work)
{
struct snd_soc_codec *codec =
container_of(work, struct snd_soc_codec, delayed_work.work);
wm8971_set_bias_level(codec, codec->bias_level);
}
static int wm8971_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8971_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
int i;
u8 data[2];
u16 *cache = codec->reg_cache;
u16 reg;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8971_reg); i++) {
if (i + 1 == WM8971_RESET)
continue;
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* charge wm8971 caps */
if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
codec->bias_level = SND_SOC_BIAS_ON;
queue_delayed_work(wm8971_workq, &codec->delayed_work,
msecs_to_jiffies(1000));
}
return 0;
}
static int wm8971_init(struct snd_soc_device *socdev,
enum snd_soc_control_type control)
{
struct snd_soc_codec *codec = socdev->card->codec;
int reg, ret = 0;
codec->name = "WM8971";
codec->owner = THIS_MODULE;
codec->set_bias_level = wm8971_set_bias_level;
codec->dai = &wm8971_dai;
codec->reg_cache_size = ARRAY_SIZE(wm8971_reg);
codec->num_dai = 1;
codec->reg_cache = kmemdup(wm8971_reg, sizeof(wm8971_reg), GFP_KERNEL);
if (codec->reg_cache == NULL)
return -ENOMEM;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
if (ret < 0) {
printk(KERN_ERR "wm8971: failed to set cache I/O: %d\n", ret);
goto err;
}
wm8971_reset(codec);
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
printk(KERN_ERR "wm8971: failed to create pcms\n");
goto err;
}
/* charge output caps - set vmid to 5k for quick power up */
reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
codec->bias_level = SND_SOC_BIAS_STANDBY;
queue_delayed_work(wm8971_workq, &codec->delayed_work,
msecs_to_jiffies(1000));
/* set the update bits */
reg = snd_soc_read(codec, WM8971_LDAC);
snd_soc_write(codec, WM8971_LDAC, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_RDAC);
snd_soc_write(codec, WM8971_RDAC, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_LOUT1V);
snd_soc_write(codec, WM8971_LOUT1V, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_ROUT1V);
snd_soc_write(codec, WM8971_ROUT1V, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_LOUT2V);
snd_soc_write(codec, WM8971_LOUT2V, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_ROUT2V);
snd_soc_write(codec, WM8971_ROUT2V, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_LINVOL);
snd_soc_write(codec, WM8971_LINVOL, reg | 0x0100);
reg = snd_soc_read(codec, WM8971_RINVOL);
snd_soc_write(codec, WM8971_RINVOL, reg | 0x0100);
snd_soc_add_controls(codec, wm8971_snd_controls,
ARRAY_SIZE(wm8971_snd_controls));
wm8971_add_widgets(codec);
return ret;
err:
kfree(codec->reg_cache);
return ret;
}
/* If the i2c layer weren't so broken, we could pass this kind of data
around */
static struct snd_soc_device *wm8971_socdev;
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
static int wm8971_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct snd_soc_device *socdev = wm8971_socdev;
struct snd_soc_codec *codec = socdev->card->codec;
int ret;
i2c_set_clientdata(i2c, codec);
codec->control_data = i2c;
ret = wm8971_init(socdev, SND_SOC_I2C);
if (ret < 0)
pr_err("failed to initialise WM8971\n");
return ret;
}
static int wm8971_i2c_remove(struct i2c_client *client)
{
struct snd_soc_codec *codec = i2c_get_clientdata(client);
kfree(codec->reg_cache);
return 0;
}
static const struct i2c_device_id wm8971_i2c_id[] = {
{ "wm8971", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
static struct i2c_driver wm8971_i2c_driver = {
.driver = {
.name = "WM8971 I2C Codec",
.owner = THIS_MODULE,
},
.probe = wm8971_i2c_probe,
.remove = wm8971_i2c_remove,
.id_table = wm8971_i2c_id,
};
static int wm8971_add_i2c_device(struct platform_device *pdev,
const struct wm8971_setup_data *setup)
{
struct i2c_board_info info;
struct i2c_adapter *adapter;
struct i2c_client *client;
int ret;
ret = i2c_add_driver(&wm8971_i2c_driver);
if (ret != 0) {
dev_err(&pdev->dev, "can't add i2c driver\n");
return ret;
}
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = setup->i2c_address;
strlcpy(info.type, "wm8971", I2C_NAME_SIZE);
adapter = i2c_get_adapter(setup->i2c_bus);
if (!adapter) {
dev_err(&pdev->dev, "can't get i2c adapter %d\n",
setup->i2c_bus);
goto err_driver;
}
client = i2c_new_device(adapter, &info);
i2c_put_adapter(adapter);
if (!client) {
dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
(unsigned int)info.addr);
goto err_driver;
}
return 0;
err_driver:
i2c_del_driver(&wm8971_i2c_driver);
return -ENODEV;
}
#endif
static int wm8971_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct wm8971_setup_data *setup;
struct snd_soc_codec *codec;
struct wm8971_priv *wm8971;
int ret = 0;
pr_info("WM8971 Audio Codec %s", WM8971_VERSION);
setup = socdev->codec_data;
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
wm8971 = kzalloc(sizeof(struct wm8971_priv), GFP_KERNEL);
if (wm8971 == NULL) {
kfree(codec);
return -ENOMEM;
}
snd_soc_codec_set_drvdata(codec, wm8971);
socdev->card->codec = codec;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
wm8971_socdev = socdev;
INIT_DELAYED_WORK(&codec->delayed_work, wm8971_work);
wm8971_workq = create_workqueue("wm8971");
if (wm8971_workq == NULL) {
kfree(snd_soc_codec_get_drvdata(codec));
kfree(codec);
return -ENOMEM;
}
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
if (setup->i2c_address) {
ret = wm8971_add_i2c_device(pdev, setup);
}
#endif
/* Add other interfaces here */
if (ret != 0) {
destroy_workqueue(wm8971_workq);
kfree(snd_soc_codec_get_drvdata(codec));
kfree(codec);
}
return ret;
}
/* power down chip */
static int wm8971_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
if (codec->control_data)
wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
if (wm8971_workq)
destroy_workqueue(wm8971_workq);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8971_i2c_driver);
#endif
kfree(snd_soc_codec_get_drvdata(codec));
kfree(codec);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_wm8971 = {
.probe = wm8971_probe,
.remove = wm8971_remove,
.suspend = wm8971_suspend,
.resume = wm8971_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8971);
static int __init wm8971_modinit(void)
{
return snd_soc_register_dai(&wm8971_dai);
}
module_init(wm8971_modinit);
static void __exit wm8971_exit(void)
{
snd_soc_unregister_dai(&wm8971_dai);
}
module_exit(wm8971_exit);
MODULE_DESCRIPTION("ASoC WM8971 driver");
MODULE_AUTHOR("Lab126");
MODULE_LICENSE("GPL");
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