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linux-stable/sound/soc/codecs/wm8971.c
Lars-Peter Clausen 643518403c ASoC: wm8971: Integrate capacitor charging into the DAPM sequence 
When being powered on, either initially on probe or when resuming from
suspend, the wm8971 configures the device for quick output capacitor
charging. Since the charging can take a rather long time (up to multiple
seconds) it is done asynchronously without blocking. A delayed work item is
run once the charging is finished and the device is switched to the target
bias level.

This all done asynchronously to the regular DAPM sequence accessing the same
data structures and registers without any looking, which can lead to race
conditions. Furthermore this potentially delays the start of stream on the
CODEC while the rest of the system is already up and running, meaning the
first bytes of audio are lost. It also does no comply with the assumption of
the DAPM core that if set_bias_level() returned successfully the device will
be at the requested bias level.

This patch slightly refactors things and makes sure that the caps charging
is properly integrated into the DAPM sequence. When transitioning from
SND_SOC_BIAS_OFF to SND_SOC_BIAS_STANDBY the part will be put into fast
charging mode and a work item will be scheduled that puts it back into
standby charging once the charging period has elapsed. If a playback or
capture stream is started while charging is in progress the driver will now
wait in SND_SOC_BIAS_PREPARE until the charging is done. This makes sure
that charging is done asynchronously in the background when the chip is
idle, but at the same time makes sure that playback/capture is not started
before the charging is done.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-01 21:27:36 +01:00

750 lines
21 KiB
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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/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include "wm8971.h"
#define WM8971_REG_COUNT 43
/* codec private data */
struct wm8971_priv {
unsigned int sysclk;
struct delayed_work charge_work;
struct regmap *regmap;
};
/*
* 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 struct reg_default wm8971_reg_defaults[] = {
{ 0, 0x0097 },
{ 1, 0x0097 },
{ 2, 0x0079 },
{ 3, 0x0079 },
{ 4, 0x0000 },
{ 5, 0x0008 },
{ 6, 0x0000 },
{ 7, 0x000a },
{ 8, 0x0000 },
{ 9, 0x0000 },
{ 10, 0x00ff },
{ 11, 0x00ff },
{ 12, 0x000f },
{ 13, 0x000f },
{ 14, 0x0000 },
{ 15, 0x0000 },
{ 16, 0x0000 },
{ 17, 0x007b },
{ 18, 0x0000 },
{ 19, 0x0032 },
{ 20, 0x0000 },
{ 21, 0x00c3 },
{ 22, 0x00c3 },
{ 23, 0x00c0 },
{ 24, 0x0000 },
{ 25, 0x0000 },
{ 26, 0x0000 },
{ 27, 0x0000 },
{ 28, 0x0000 },
{ 29, 0x0000 },
{ 30, 0x0000 },
{ 31, 0x0000 },
{ 32, 0x0000 },
{ 33, 0x0000 },
{ 34, 0x0050 },
{ 35, 0x0050 },
{ 36, 0x0050 },
{ 37, 0x0050 },
{ 38, 0x0050 },
{ 39, 0x0050 },
{ 40, 0x0079 },
{ 41, 0x0079 },
{ 42, 0x0079 },
};
#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_SUPPLY("Mic Bias", WM8971_PWR1, 1, 0, NULL, 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 wm8971_dapm_routes[] = {
/* 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"},
};
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_codec *codec = dai->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_width(params)) {
case 16:
break;
case 20:
iface |= 0x0004;
break;
case 24:
iface |= 0x0008;
break;
case 32:
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 void wm8971_charge_work(struct work_struct *work)
{
struct wm8971_priv *wm8971 =
container_of(work, struct wm8971_priv, charge_work.work);
/* Set to 500k */
regmap_update_bits(wm8971->regmap, WM8971_PWR1, 0x0180, 0x0100);
}
static int wm8971_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
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:
/* Wait until fully charged */
flush_delayed_work(&wm8971->charge_work);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
snd_soc_cache_sync(codec);
/* charge output caps - set vmid to 5k for quick power up */
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x01c0);
queue_delayed_work(system_power_efficient_wq,
&wm8971->charge_work, msecs_to_jiffies(1000));
} else {
/* mute dac and set vmid to 500k, enable VREF */
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
}
break;
case SND_SOC_BIAS_OFF:
cancel_delayed_work_sync(&wm8971->charge_work);
snd_soc_write(codec, WM8971_PWR1, 0x0001);
break;
}
codec->dapm.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 const 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,
};
static struct snd_soc_dai_driver wm8971_dai = {
.name = "wm8971-hifi",
.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,
};
static int wm8971_suspend(struct snd_soc_codec *codec)
{
wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8971_resume(struct snd_soc_codec *codec)
{
wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int wm8971_probe(struct snd_soc_codec *codec)
{
struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
INIT_DELAYED_WORK(&wm8971->charge_work, wm8971_charge_work);
wm8971_reset(codec);
wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* set the update bits */
snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_LOUT1V, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_ROUT1V, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_LOUT2V, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_ROUT2V, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
return 0;
}
/* power down chip */
static int wm8971_remove(struct snd_soc_codec *codec)
{
wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
.probe = wm8971_probe,
.remove = wm8971_remove,
.suspend = wm8971_suspend,
.resume = wm8971_resume,
.set_bias_level = wm8971_set_bias_level,
.controls = wm8971_snd_controls,
.num_controls = ARRAY_SIZE(wm8971_snd_controls),
.dapm_widgets = wm8971_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8971_dapm_widgets),
.dapm_routes = wm8971_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm8971_dapm_routes),
};
static const struct regmap_config wm8971_regmap = {
.reg_bits = 7,
.val_bits = 9,
.max_register = WM8971_MOUTV,
.reg_defaults = wm8971_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8971_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
static int wm8971_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8971_priv *wm8971;
int ret;
wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
GFP_KERNEL);
if (wm8971 == NULL)
return -ENOMEM;
wm8971->regmap = devm_regmap_init_i2c(i2c, &wm8971_regmap);
if (IS_ERR(wm8971->regmap))
return PTR_ERR(wm8971->regmap);
i2c_set_clientdata(i2c, wm8971);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8971, &wm8971_dai, 1);
return ret;
}
static int wm8971_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
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",
.owner = THIS_MODULE,
},
.probe = wm8971_i2c_probe,
.remove = wm8971_i2c_remove,
.id_table = wm8971_i2c_id,
};
module_i2c_driver(wm8971_i2c_driver);
MODULE_DESCRIPTION("ASoC WM8971 driver");
MODULE_AUTHOR("Lab126");
MODULE_LICENSE("GPL");
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