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wm8971.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* wm8971.c -- WM8971 ALSA SoC Audio driver
*
* Copyright 2005 Lab126, Inc.
*
* Author: Kenneth Kiraly <[email protected]>
*
* Based on wm8753.c by Liam Girdwood
*/
#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_component_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_component *component = codec_dai->component;
struct wm8971_priv *wm8971 = snd_soc_component_get_drvdata(component);
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_component *component = codec_dai->component;
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_component_write(component, 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_component *component = dai->component;
struct wm8971_priv *wm8971 = snd_soc_component_get_drvdata(component);
u16 iface = snd_soc_component_read(component, WM8971_IFACE) & 0x1f3;
u16 srate = snd_soc_component_read(component, 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_component_write(component, WM8971_IFACE, iface);
if (coeff >= 0)
snd_soc_component_write(component, 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, int direction)
{
struct snd_soc_component *component = dai->component;
u16 mute_reg = snd_soc_component_read(component, WM8971_ADCDAC) & 0xfff7;
if (mute)
snd_soc_component_write(component, WM8971_ADCDAC, mute_reg | 0x8);
else
snd_soc_component_write(component, 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_component *component,
enum snd_soc_bias_level level)
{
struct wm8971_priv *wm8971 = snd_soc_component_get_drvdata(component);
u16 pwr_reg = snd_soc_component_read(component, WM8971_PWR1) & 0xfe3e;
switch (level) {
case SND_SOC_BIAS_ON:
/* set vmid to 50k and unmute dac */
snd_soc_component_write(component, 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 (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
snd_soc_component_cache_sync(component);
/* charge output caps - set vmid to 5k for quick power up */
snd_soc_component_write(component, 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_component_write(component, WM8971_PWR1, pwr_reg | 0x0140);
}
break;
case SND_SOC_BIAS_OFF:
cancel_delayed_work_sync(&wm8971->charge_work);
snd_soc_component_write(component, WM8971_PWR1, 0x0001);
break;
}
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,
.mute_stream = wm8971_mute,
.set_fmt = wm8971_set_dai_fmt,
.set_sysclk = wm8971_set_dai_sysclk,
.no_capture_mute = 1,
};
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_probe(struct snd_soc_component *component)
{
struct wm8971_priv *wm8971 = snd_soc_component_get_drvdata(component);
INIT_DELAYED_WORK(&wm8971->charge_work, wm8971_charge_work);
wm8971_reset(component);
/* set the update bits */
snd_soc_component_update_bits(component, WM8971_LDAC, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_RDAC, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_LOUT1V, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_ROUT1V, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_LOUT2V, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_ROUT2V, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_LINVOL, 0x0100, 0x0100);
snd_soc_component_update_bits(component, WM8971_RINVOL, 0x0100, 0x0100);
return 0;
}
static const struct snd_soc_component_driver soc_component_dev_wm8971 = {
.probe = wm8971_probe,
.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),
.suspend_bias_off = 1,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
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 = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_wm8971, &wm8971_dai, 1);
return ret;
}
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",
},
.probe = wm8971_i2c_probe,
.id_table = wm8971_i2c_id,
};
module_i2c_driver(wm8971_i2c_driver);
MODULE_DESCRIPTION("ASoC WM8971 driver");
MODULE_AUTHOR("Lab126");
MODULE_LICENSE("GPL");