Initial import

1 files changed, 725 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
new file mode 100644
index 000000000..f9cbabdc6
--- /dev/null
+++ b/sound/soc/codecs/wm8971.c
@@ -0,0 +1,725 @@
+/*
+ * 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_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);
+
+	/* 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;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
+	.probe =	wm8971_probe,
+	.set_bias_level = wm8971_set_bias_level,
+	.suspend_bias_off = true,
+
+	.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");