ALSA: ASoC: Add WM8900 CODEC driver

The WM8900 is designed for portable multimedia applications requiring
low power consumption, high performance audio and a compact form factor
providing:

 - 24 bit stereo ADC and DAC
 - Microphone and line inputs
 - Line outputs
 - Class G headphone amplifier

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 1542 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8900.c b/sound/soc/codecs/wm8900.c
new file mode 100644
index 00000000000..0b8c6d38b48
--- /dev/null
+++ b/sound/soc/codecs/wm8900.c
@@ -0,0 +1,1542 @@
+/*
+ * wm8900.c  --  WM8900 ALSA Soc Audio driver
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * 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.
+ *
+ * TODO:
+ *  - Tristating.
+ *  - TDM.
+ *  - Jack detect.
+ *  - FLL source configuration, currently only MCLK is supported.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <linux/kernel.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 <sound/tlv.h>
+
+#include "wm8900.h"
+
+/* WM8900 register space */
+#define WM8900_REG_RESET	0x0
+#define WM8900_REG_ID		0x0
+#define WM8900_REG_POWER1	0x1
+#define WM8900_REG_POWER2	0x2
+#define WM8900_REG_POWER3	0x3
+#define WM8900_REG_AUDIO1	0x4
+#define WM8900_REG_AUDIO2	0x5
+#define WM8900_REG_CLOCKING1    0x6
+#define WM8900_REG_CLOCKING2    0x7
+#define WM8900_REG_AUDIO3       0x8
+#define WM8900_REG_AUDIO4       0x9
+#define WM8900_REG_DACCTRL      0xa
+#define WM8900_REG_LDAC_DV      0xb
+#define WM8900_REG_RDAC_DV      0xc
+#define WM8900_REG_SIDETONE     0xd
+#define WM8900_REG_ADCCTRL      0xe
+#define WM8900_REG_LADC_DV	0xf
+#define WM8900_REG_RADC_DV      0x10
+#define WM8900_REG_GPIO         0x12
+#define WM8900_REG_INCTL	0x15
+#define WM8900_REG_LINVOL	0x16
+#define WM8900_REG_RINVOL	0x17
+#define WM8900_REG_INBOOSTMIX1  0x18
+#define WM8900_REG_INBOOSTMIX2  0x19
+#define WM8900_REG_ADCPATH	0x1a
+#define WM8900_REG_AUXBOOST	0x1b
+#define WM8900_REG_ADDCTL       0x1e
+#define WM8900_REG_FLLCTL1      0x24
+#define WM8900_REG_FLLCTL2      0x25
+#define WM8900_REG_FLLCTL3      0x26
+#define WM8900_REG_FLLCTL4      0x27
+#define WM8900_REG_FLLCTL5      0x28
+#define WM8900_REG_FLLCTL6      0x29
+#define WM8900_REG_LOUTMIXCTL1  0x2c
+#define WM8900_REG_ROUTMIXCTL1  0x2d
+#define WM8900_REG_BYPASS1	0x2e
+#define WM8900_REG_BYPASS2	0x2f
+#define WM8900_REG_AUXOUT_CTL   0x30
+#define WM8900_REG_LOUT1CTL     0x33
+#define WM8900_REG_ROUT1CTL     0x34
+#define WM8900_REG_LOUT2CTL	0x35
+#define WM8900_REG_ROUT2CTL	0x36
+#define WM8900_REG_HPCTL1	0x3a
+#define WM8900_REG_OUTBIASCTL   0x73
+
+#define WM8900_MAXREG		0x80
+
+#define WM8900_REG_ADDCTL_OUT1_DIS    0x80
+#define WM8900_REG_ADDCTL_OUT2_DIS    0x40
+#define WM8900_REG_ADDCTL_VMID_DIS    0x20
+#define WM8900_REG_ADDCTL_BIAS_SRC    0x10
+#define WM8900_REG_ADDCTL_VMID_SOFTST 0x04
+#define WM8900_REG_ADDCTL_TEMP_SD     0x02
+
+#define WM8900_REG_GPIO_TEMP_ENA   0x2
+
+#define WM8900_REG_POWER1_STARTUP_BIAS_ENA 0x0100
+#define WM8900_REG_POWER1_BIAS_ENA         0x0008
+#define WM8900_REG_POWER1_VMID_BUF_ENA     0x0004
+#define WM8900_REG_POWER1_FLL_ENA          0x0040
+
+#define WM8900_REG_POWER2_SYSCLK_ENA  0x8000
+#define WM8900_REG_POWER2_ADCL_ENA    0x0002
+#define WM8900_REG_POWER2_ADCR_ENA    0x0001
+
+#define WM8900_REG_POWER3_DACL_ENA    0x0002
+#define WM8900_REG_POWER3_DACR_ENA    0x0001
+
+#define WM8900_REG_AUDIO1_AIF_FMT_MASK 0x0018
+#define WM8900_REG_AUDIO1_LRCLK_INV    0x0080
+#define WM8900_REG_AUDIO1_BCLK_INV     0x0100
+
+#define WM8900_REG_CLOCKING1_BCLK_DIR   0x1
+#define WM8900_REG_CLOCKING1_MCLK_SRC   0x100
+#define WM8900_REG_CLOCKING1_BCLK_MASK  (~0x01e)
+#define WM8900_REG_CLOCKING1_OPCLK_MASK (~0x7000)
+
+#define WM8900_REG_CLOCKING2_ADC_CLKDIV 0xe0
+#define WM8900_REG_CLOCKING2_DAC_CLKDIV 0x1c
+
+#define WM8900_REG_DACCTRL_MUTE          0x004
+#define WM8900_REG_DACCTRL_AIF_LRCLKRATE 0x400
+
+#define WM8900_REG_AUDIO3_ADCLRC_DIR    0x0800
+
+#define WM8900_REG_AUDIO4_DACLRC_DIR    0x0800
+
+#define WM8900_REG_FLLCTL1_OSC_ENA    0x100
+
+#define WM8900_REG_FLLCTL6_FLL_SLOW_LOCK_REF 0x100
+
+#define WM8900_REG_HPCTL1_HP_IPSTAGE_ENA 0x80
+#define WM8900_REG_HPCTL1_HP_OPSTAGE_ENA 0x40
+#define WM8900_REG_HPCTL1_HP_CLAMP_IP    0x20
+#define WM8900_REG_HPCTL1_HP_CLAMP_OP    0x10
+#define WM8900_REG_HPCTL1_HP_SHORT       0x08
+#define WM8900_REG_HPCTL1_HP_SHORT2      0x04
+
+#define WM8900_LRC_MASK 0xfc00
+
+struct snd_soc_codec_device soc_codec_dev_wm8900;
+
+struct wm8900_priv {
+	u32 fll_in; /* FLL input frequency */
+	u32 fll_out; /* FLL output frequency */
+};
+
+/*
+ * wm8900 register cache.  We can't read the entire register space and we
+ * have slow control buses so we cache the registers.
+ */
+static const u16 wm8900_reg_defaults[WM8900_MAXREG] = {
+	0x8900, 0x0000,
+	0xc000, 0x0000,
+	0x4050, 0x4000,
+	0x0008, 0x0000,
+	0x0040, 0x0040,
+	0x1004, 0x00c0,
+	0x00c0, 0x0000,
+	0x0100, 0x00c0,
+	0x00c0, 0x0000,
+	0xb001, 0x0000,
+	0x0000, 0x0044,
+	0x004c, 0x004c,
+	0x0044, 0x0044,
+	0x0000, 0x0044,
+	0x0000, 0x0000,
+	0x0002, 0x0000,
+	0x0000, 0x0000,
+	0x0000, 0x0000,
+	0x0008, 0x0000,
+	0x0000, 0x0008,
+	0x0097, 0x0100,
+	0x0000, 0x0000,
+	0x0050, 0x0050,
+	0x0055, 0x0055,
+	0x0055, 0x0000,
+	0x0000, 0x0079,
+	0x0079, 0x0079,
+	0x0079, 0x0000,
+	/* Remaining registers all zero */
+};
+
+/*
+ * read wm8900 register cache
+ */
+static inline unsigned int wm8900_read_reg_cache(struct snd_soc_codec *codec,
+	unsigned int reg)
+{
+	u16 *cache = codec->reg_cache;
+
+	BUG_ON(reg >= WM8900_MAXREG);
+
+	if (reg == WM8900_REG_ID)
+		return 0;
+
+	return cache[reg];
+}
+
+/*
+ * write wm8900 register cache
+ */
+static inline void wm8900_write_reg_cache(struct snd_soc_codec *codec,
+	u16 reg, unsigned int value)
+{
+	u16 *cache = codec->reg_cache;
+
+	BUG_ON(reg >= WM8900_MAXREG);
+
+	cache[reg] = value;
+}
+
+/*
+ * write to the WM8900 register space
+ */
+static int wm8900_write(struct snd_soc_codec *codec, unsigned int reg,
+			unsigned int value)
+{
+	u8 data[3];
+
+	if (value == wm8900_read_reg_cache(codec, reg))
+		return 0;
+
+	/* data is
+	 *   D15..D9 WM8900 register offset
+	 *   D8...D0 register data
+	 */
+	data[0] = reg;
+	data[1] = value >> 8;
+	data[2] = value & 0x00ff;
+
+	wm8900_write_reg_cache(codec, reg, value);
+	if (codec->hw_write(codec->control_data, data, 3) == 3)
+		return 0;
+	else
+		return -EIO;
+}
+
+/*
+ * Read from the wm8900.
+ */
+static unsigned int wm8900_chip_read(struct snd_soc_codec *codec, u8 reg)
+{
+	struct i2c_msg xfer[2];
+	u16 data;
+	int ret;
+	struct i2c_client *client = codec->control_data;
+
+	BUG_ON(reg != WM8900_REG_ID && reg != WM8900_REG_POWER1);
+
+	/* Write register */
+	xfer[0].addr = client->addr;
+	xfer[0].flags = 0;
+	xfer[0].len = 1;
+	xfer[0].buf = &reg;
+
+	/* Read data */
+	xfer[1].addr = client->addr;
+	xfer[1].flags = I2C_M_RD;
+	xfer[1].len = 2;
+	xfer[1].buf = (u8 *)&data;
+
+	ret = i2c_transfer(client->adapter, xfer, 2);
+	if (ret != 2) {
+		printk(KERN_CRIT "i2c_transfer returned %d\n", ret);
+		return 0;
+	}
+
+	return (data >> 8) | ((data & 0xff) << 8);
+}
+
+/*
+ * Read from the WM8900 register space.  Most registers can't be read
+ * and are therefore supplied from cache.
+ */
+static unsigned int wm8900_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+	switch (reg) {
+	case WM8900_REG_ID:
+		return wm8900_chip_read(codec, reg);
+	default:
+		return wm8900_read_reg_cache(codec, reg);
+	}
+}
+
+static void wm8900_reset(struct snd_soc_codec *codec)
+{
+	wm8900_write(codec, WM8900_REG_RESET, 0);
+
+	memcpy(codec->reg_cache, wm8900_reg_defaults,
+	       sizeof(codec->reg_cache));
+}
+
+static int wm8900_hp_event(struct snd_soc_dapm_widget *w,
+			   struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_codec *codec = w->codec;
+	u16 hpctl1 = wm8900_read(codec, WM8900_REG_HPCTL1);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		/* Clamp headphone outputs */
+		hpctl1 = WM8900_REG_HPCTL1_HP_CLAMP_IP |
+			WM8900_REG_HPCTL1_HP_CLAMP_OP;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+		break;
+
+	case SND_SOC_DAPM_POST_PMU:
+		/* Enable the input stage */
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_CLAMP_IP;
+		hpctl1 |= WM8900_REG_HPCTL1_HP_SHORT |
+			WM8900_REG_HPCTL1_HP_SHORT2 |
+			WM8900_REG_HPCTL1_HP_IPSTAGE_ENA;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+
+		msleep(400);
+
+		/* Enable the output stage */
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_CLAMP_OP;
+		hpctl1 |= WM8900_REG_HPCTL1_HP_OPSTAGE_ENA;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+
+		/* Remove the shorts */
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_SHORT2;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_SHORT;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+		break;
+
+	case SND_SOC_DAPM_PRE_PMD:
+		/* Short the output */
+		hpctl1 |= WM8900_REG_HPCTL1_HP_SHORT;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+
+		/* Disable the output stage */
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_OPSTAGE_ENA;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+
+		/* Clamp the outputs and power down input */
+		hpctl1 |= WM8900_REG_HPCTL1_HP_CLAMP_IP |
+			WM8900_REG_HPCTL1_HP_CLAMP_OP;
+		hpctl1 &= ~WM8900_REG_HPCTL1_HP_IPSTAGE_ENA;
+		wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
+		break;
+
+	case SND_SOC_DAPM_POST_PMD:
+		/* Disable everything */
+		wm8900_write(codec, WM8900_REG_HPCTL1, 0);
+		break;
+
+	default:
+		BUG();
+	}
+
+	return 0;
+}
+
+static const DECLARE_TLV_DB_SCALE(out_pga_tlv, -5700, 100, 0);
+
+static const DECLARE_TLV_DB_SCALE(out_mix_tlv, -1500, 300, 0);
+
+static const DECLARE_TLV_DB_SCALE(in_boost_tlv, -1200, 600, 0);
+
+static const DECLARE_TLV_DB_SCALE(in_pga_tlv, -1200, 100, 0);
+
+static const DECLARE_TLV_DB_SCALE(dac_boost_tlv, 0, 600, 0);
+
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -7200, 75, 1);
+
+static const DECLARE_TLV_DB_SCALE(adc_svol_tlv, -3600, 300, 0);
+
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1);
+
+static const char *mic_bias_level_txt[] = { "0.9*AVDD", "0.65*AVDD" };
+
+static const struct soc_enum mic_bias_level =
+SOC_ENUM_SINGLE(WM8900_REG_INCTL, 8, 2, mic_bias_level_txt);
+
+static const char *dac_mute_rate_txt[] = { "Fast", "Slow" };
+
+static const struct soc_enum dac_mute_rate =
+SOC_ENUM_SINGLE(WM8900_REG_DACCTRL, 7, 2, dac_mute_rate_txt);
+
+static const char *dac_deemphasis_txt[] = {
+	"Disabled", "32kHz", "44.1kHz", "48kHz"
+};
+
+static const struct soc_enum dac_deemphasis =
+SOC_ENUM_SINGLE(WM8900_REG_DACCTRL, 4, 4, dac_deemphasis_txt);
+
+static const char *adc_hpf_cut_txt[] = {
+	"Hi-fi mode", "Voice mode 1", "Voice mode 2", "Voice mode 3"
+};
+
+static const struct soc_enum adc_hpf_cut =
+SOC_ENUM_SINGLE(WM8900_REG_ADCCTRL, 5, 4, adc_hpf_cut_txt);
+
+static const char *lr_txt[] = {
+	"Left", "Right"
+};
+
+static const struct soc_enum aifl_src =
+SOC_ENUM_SINGLE(WM8900_REG_AUDIO1, 15, 2, lr_txt);
+
+static const struct soc_enum aifr_src =
+SOC_ENUM_SINGLE(WM8900_REG_AUDIO1, 14, 2, lr_txt);
+
+static const struct soc_enum dacl_src =
+SOC_ENUM_SINGLE(WM8900_REG_AUDIO2, 15, 2, lr_txt);
+
+static const struct soc_enum dacr_src =
+SOC_ENUM_SINGLE(WM8900_REG_AUDIO2, 14, 2, lr_txt);
+
+static const char *sidetone_txt[] = {
+	"Disabled", "Left ADC", "Right ADC"
+};
+
+static const struct soc_enum dacl_sidetone =
+SOC_ENUM_SINGLE(WM8900_REG_SIDETONE, 2, 3, sidetone_txt);
+
+static const struct soc_enum dacr_sidetone =
+SOC_ENUM_SINGLE(WM8900_REG_SIDETONE, 0, 3, sidetone_txt);
+
+static const struct snd_kcontrol_new wm8900_snd_controls[] = {
+SOC_ENUM("Mic Bias Level", mic_bias_level),
+
+SOC_SINGLE_TLV("Left Input PGA Volume", WM8900_REG_LINVOL, 0, 31, 0,
+	       in_pga_tlv),
+SOC_SINGLE("Left Input PGA Switch", WM8900_REG_LINVOL, 6, 1, 1),
+SOC_SINGLE("Left Input PGA ZC Switch", WM8900_REG_LINVOL, 7, 1, 0),
+
+SOC_SINGLE_TLV("Right Input PGA Volume", WM8900_REG_RINVOL, 0, 31, 0,
+	       in_pga_tlv),
+SOC_SINGLE("Right Input PGA Switch", WM8900_REG_RINVOL, 6, 1, 1),
+SOC_SINGLE("Right Input PGA ZC Switch", WM8900_REG_RINVOL, 7, 1, 0),
+
+SOC_SINGLE("DAC Soft Mute Switch", WM8900_REG_DACCTRL, 6, 1, 1),
+SOC_ENUM("DAC Mute Rate", dac_mute_rate),
+SOC_SINGLE("DAC Mono Switch", WM8900_REG_DACCTRL, 9, 1, 0),
+SOC_ENUM("DAC Deemphasis", dac_deemphasis),
+SOC_SINGLE("DAC Sloping Stopband Filter Switch", WM8900_REG_DACCTRL, 8, 1, 0),
+SOC_SINGLE("DAC Sigma-Delta Modulator Clock Switch", WM8900_REG_DACCTRL,
+	   12, 1, 0),
+
+SOC_SINGLE("ADC HPF Switch", WM8900_REG_ADCCTRL, 8, 1, 0),
+SOC_ENUM("ADC HPF Cut-Off", adc_hpf_cut),
+SOC_DOUBLE("ADC Invert Switch", WM8900_REG_ADCCTRL, 1, 0, 1, 0),
+SOC_SINGLE_TLV("Left ADC Sidetone Volume", WM8900_REG_SIDETONE, 9, 12, 0,
+	       adc_svol_tlv),
+SOC_SINGLE_TLV("Right ADC Sidetone Volume", WM8900_REG_SIDETONE, 5, 12, 0,
+	       adc_svol_tlv),
+SOC_ENUM("Left Digital Audio Source", aifl_src),
+SOC_ENUM("Right Digital Audio Source", aifr_src),
+
+SOC_SINGLE_TLV("DAC Input Boost Volume", WM8900_REG_AUDIO2, 10, 4, 0,
+	       dac_boost_tlv),
+SOC_ENUM("Left DAC Source", dacl_src),
+SOC_ENUM("Right DAC Source", dacr_src),
+SOC_ENUM("Left DAC Sidetone", dacl_sidetone),
+SOC_ENUM("Right DAC Sidetone", dacr_sidetone),
+SOC_DOUBLE("DAC Invert Switch", WM8900_REG_DACCTRL, 1, 0, 1, 0),
+
+SOC_DOUBLE_R_TLV("Digital Playback Volume",
+		 WM8900_REG_LDAC_DV, WM8900_REG_RDAC_DV,
+		 1, 96, 0, dac_tlv),
+SOC_DOUBLE_R_TLV("Digital Capture Volume",
+		 WM8900_REG_LADC_DV, WM8900_REG_RADC_DV, 1, 119, 0, adc_tlv),
+
+SOC_SINGLE_TLV("LINPUT3 Bypass Volume", WM8900_REG_LOUTMIXCTL1, 4, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("RINPUT3 Bypass Volume", WM8900_REG_ROUTMIXCTL1, 4, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("Left AUX Bypass Volume", WM8900_REG_AUXOUT_CTL, 4, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("Right AUX Bypass Volume", WM8900_REG_AUXOUT_CTL, 0, 7, 0,
+	       out_mix_tlv),
+
+SOC_SINGLE_TLV("LeftIn to RightOut Mixer Volume", WM8900_REG_BYPASS1, 0, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("LeftIn to LeftOut Mixer Volume", WM8900_REG_BYPASS1, 4, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("RightIn to LeftOut Mixer Volume", WM8900_REG_BYPASS2, 0, 7, 0,
+	       out_mix_tlv),
+SOC_SINGLE_TLV("RightIn to RightOut Mixer Volume", WM8900_REG_BYPASS2, 4, 7, 0,
+	       out_mix_tlv),
+
+SOC_SINGLE_TLV("IN2L Boost Volume", WM8900_REG_INBOOSTMIX1, 0, 3, 0,
+	       in_boost_tlv),
+SOC_SINGLE_TLV("IN3L Boost Volume", WM8900_REG_INBOOSTMIX1, 4, 3, 0,
+	       in_boost_tlv),
+SOC_SINGLE_TLV("IN2R Boost Volume", WM8900_REG_INBOOSTMIX2, 0, 3, 0,
+	       in_boost_tlv),
+SOC_SINGLE_TLV("IN3R Boost Volume", WM8900_REG_INBOOSTMIX2, 4, 3, 0,
+	       in_boost_tlv),
+SOC_SINGLE_TLV("Left AUX Boost Volume", WM8900_REG_AUXBOOST, 4, 3, 0,
+	       in_boost_tlv),
+SOC_SINGLE_TLV("Right AUX Boost Volume", WM8900_REG_AUXBOOST, 0, 3, 0,
+	       in_boost_tlv),
+
+SOC_DOUBLE_R_TLV("LINEOUT1 Volume", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
+	       0, 63, 0, out_pga_tlv),
+SOC_DOUBLE_R("LINEOUT1 Switch", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
+	     6, 1, 1),
+SOC_DOUBLE_R("LINEOUT1 ZC Switch", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
+	     7, 1, 0),
+
+SOC_DOUBLE_R_TLV("LINEOUT2 Volume",
+		 WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL,
+		 0, 63, 0, out_pga_tlv),
+SOC_DOUBLE_R("LINEOUT2 Switch",
+	     WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL, 6, 1, 1),
+SOC_DOUBLE_R("LINEOUT2 ZC Switch",
+	     WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL, 7, 1, 0),
+SOC_SINGLE("LINEOUT2 LP -12dB", WM8900_REG_LOUTMIXCTL1,
+	   0, 1, 1),
+
+};
+
+/* add non dapm controls */
+static int wm8900_add_controls(struct snd_soc_codec *codec)
+{
+	int err, i;
+
+	for (i = 0; i < ARRAY_SIZE(wm8900_snd_controls); i++) {
+		err = snd_ctl_add(codec->card,
+				  snd_soc_cnew(&wm8900_snd_controls[i],
+					       codec, NULL));
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+static const struct snd_kcontrol_new wm8900_dapm_loutput2_control =
+SOC_DAPM_SINGLE("LINEOUT2L Switch", WM8900_REG_POWER3, 6, 1, 0);
+
+static const struct snd_kcontrol_new wm8900_dapm_routput2_control =
+SOC_DAPM_SINGLE("LINEOUT2R Switch", WM8900_REG_POWER3, 5, 1, 0);
+
+static const struct snd_kcontrol_new wm8900_loutmix_controls[] = {
+SOC_DAPM_SINGLE("LINPUT3 Bypass Switch", WM8900_REG_LOUTMIXCTL1, 7, 1, 0),
+SOC_DAPM_SINGLE("AUX Bypass Switch", WM8900_REG_AUXOUT_CTL, 7, 1, 0),
+SOC_DAPM_SINGLE("Left Input Mixer Switch", WM8900_REG_BYPASS1, 7, 1, 0),
+SOC_DAPM_SINGLE("Right Input Mixer Switch", WM8900_REG_BYPASS2, 3, 1, 0),
+SOC_DAPM_SINGLE("DACL Switch", WM8900_REG_LOUTMIXCTL1, 8, 1, 0),
+};
+
+static const struct snd_kcontrol_new wm8900_routmix_controls[] = {
+SOC_DAPM_SINGLE("RINPUT3 Bypass Switch", WM8900_REG_ROUTMIXCTL1, 7, 1, 0),
+SOC_DAPM_SINGLE("AUX Bypass Switch", WM8900_REG_AUXOUT_CTL, 3, 1, 0),
+SOC_DAPM_SINGLE("Left Input Mixer Switch", WM8900_REG_BYPASS1, 3, 1, 0),
+SOC_DAPM_SINGLE("Right Input Mixer Switch", WM8900_REG_BYPASS2, 7, 1, 0),
+SOC_DAPM_SINGLE("DACR Switch", WM8900_REG_ROUTMIXCTL1, 8, 1, 0),
+};
+
+static const struct snd_kcontrol_new wm8900_linmix_controls[] = {
+SOC_DAPM_SINGLE("LINPUT2 Switch", WM8900_REG_INBOOSTMIX1, 2, 1, 1),
+SOC_DAPM_SINGLE("LINPUT3 Switch", WM8900_REG_INBOOSTMIX1, 6, 1, 1),
+SOC_DAPM_SINGLE("AUX Switch", WM8900_REG_AUXBOOST, 6, 1, 1),
+SOC_DAPM_SINGLE("Input PGA Switch", WM8900_REG_ADCPATH, 6, 1, 0),
+};
+
+static const struct snd_kcontrol_new wm8900_rinmix_controls[] = {
+SOC_DAPM_SINGLE("RINPUT2 Switch", WM8900_REG_INBOOSTMIX2, 2, 1, 1),
+SOC_DAPM_SINGLE("RINPUT3 Switch", WM8900_REG_INBOOSTMIX2, 6, 1, 1),
+SOC_DAPM_SINGLE("AUX Switch", WM8900_REG_AUXBOOST, 2, 1, 1),
+SOC_DAPM_SINGLE("Input PGA Switch", WM8900_REG_ADCPATH, 2, 1, 0),
+};
+
+static const struct snd_kcontrol_new wm8900_linpga_controls[] = {
+SOC_DAPM_SINGLE("LINPUT1 Switch", WM8900_REG_INCTL, 6, 1, 0),
+SOC_DAPM_SINGLE("LINPUT2 Switch", WM8900_REG_INCTL, 5, 1, 0),
+SOC_DAPM_SINGLE("LINPUT3 Switch", WM8900_REG_INCTL, 4, 1, 0),
+};
+
+static const struct snd_kcontrol_new wm8900_rinpga_controls[] = {
+SOC_DAPM_SINGLE("RINPUT1 Switch", WM8900_REG_INCTL, 2, 1, 0),
+SOC_DAPM_SINGLE("RINPUT2 Switch", WM8900_REG_INCTL, 1, 1, 0),
+SOC_DAPM_SINGLE("RINPUT3 Switch", WM8900_REG_INCTL, 0, 1, 0),
+};
+
+static const char *wm9700_lp_mux[] = { "Disabled", "Enabled" };
+
+static const struct soc_enum wm8900_lineout2_lp_mux =
+SOC_ENUM_SINGLE(WM8900_REG_LOUTMIXCTL1, 1, 2, wm9700_lp_mux);
+
+static const struct snd_kcontrol_new wm8900_lineout2_lp =
+SOC_DAPM_ENUM("Route", wm8900_lineout2_lp_mux);
+
+static const struct snd_soc_dapm_widget wm8900_dapm_widgets[] = {
+
+/* Externally visible pins */
+SND_SOC_DAPM_OUTPUT("LINEOUT1L"),
+SND_SOC_DAPM_OUTPUT("LINEOUT1R"),
+SND_SOC_DAPM_OUTPUT("LINEOUT2L"),
+SND_SOC_DAPM_OUTPUT("LINEOUT2R"),
+SND_SOC_DAPM_OUTPUT("HP_L"),
+SND_SOC_DAPM_OUTPUT("HP_R"),
+
+SND_SOC_DAPM_INPUT("RINPUT1"),
+SND_SOC_DAPM_INPUT("LINPUT1"),
+SND_SOC_DAPM_INPUT("RINPUT2"),
+SND_SOC_DAPM_INPUT("LINPUT2"),
+SND_SOC_DAPM_INPUT("RINPUT3"),
+SND_SOC_DAPM_INPUT("LINPUT3"),
+SND_SOC_DAPM_INPUT("AUX"),
+
+SND_SOC_DAPM_VMID("VMID"),
+
+/* Input */
+SND_SOC_DAPM_MIXER("Left Input PGA", WM8900_REG_POWER2, 3, 0,
+		   wm8900_linpga_controls,
+		   ARRAY_SIZE(wm8900_linpga_controls)),
+SND_SOC_DAPM_MIXER("Right Input PGA", WM8900_REG_POWER2, 2, 0,
+		   wm8900_rinpga_controls,
+		   ARRAY_SIZE(wm8900_rinpga_controls)),
+
+SND_SOC_DAPM_MIXER("Left Input Mixer", WM8900_REG_POWER2, 5, 0,
+		   wm8900_linmix_controls,
+		   ARRAY_SIZE(wm8900_linmix_controls)),
+SND_SOC_DAPM_MIXER("Right Input Mixer", WM8900_REG_POWER2, 4, 0,
+		   wm8900_rinmix_controls,
+		   ARRAY_SIZE(wm8900_rinmix_controls)),
+
+SND_SOC_DAPM_MICBIAS("Mic Bias", WM8900_REG_POWER1, 4, 0),
+
+SND_SOC_DAPM_ADC("ADCL", "Left HiFi Capture", WM8900_REG_POWER2, 1, 0),
+SND_SOC_DAPM_ADC("ADCR", "Right HiFi Capture", WM8900_REG_POWER2, 0, 0),
+
+/* Output */
+SND_SOC_DAPM_DAC("DACL", "Left HiFi Playback", WM8900_REG_POWER3, 1, 0),
+SND_SOC_DAPM_DAC("DACR", "Right HiFi Playback", WM8900_REG_POWER3, 0, 0),
+
+SND_SOC_DAPM_PGA_E("Headphone Amplifier", WM8900_REG_POWER3, 7, 0, NULL, 0,
+		   wm8900_hp_event,
+		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+		   SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
+
+SND_SOC_DAPM_PGA("LINEOUT1L PGA", WM8900_REG_POWER2, 8, 0, NULL, 0),
+SND_SOC_DAPM_PGA("LINEOUT1R PGA", WM8900_REG_POWER2, 7, 0, NULL, 0),
+
+SND_SOC_DAPM_MUX("LINEOUT2 LP", SND_SOC_NOPM, 0, 0, &wm8900_lineout2_lp),
+SND_SOC_DAPM_PGA("LINEOUT2L PGA", WM8900_REG_POWER3, 6, 0, NULL, 0),
+SND_SOC_DAPM_PGA("LINEOUT2R PGA", WM8900_REG_POWER3, 5, 0, NULL, 0),
+
+SND_SOC_DAPM_MIXER("Left Output Mixer", WM8900_REG_POWER3, 3, 0,
+		   wm8900_loutmix_controls,
+		   ARRAY_SIZE(wm8900_loutmix_controls)),
+SND_SOC_DAPM_MIXER("Right Output Mixer", WM8900_REG_POWER3, 2, 0,
+		   wm8900_routmix_controls,
+		   ARRAY_SIZE(wm8900_routmix_controls)),
+};
+
+/* Target, Path, Source */
+static const struct snd_soc_dapm_route audio_map[] = {
+/* Inputs */
+{"Left Input PGA", "LINPUT1 Switch", "LINPUT1"},
+{"Left Input PGA", "LINPUT2 Switch", "LINPUT2"},
+{"Left Input PGA", "LINPUT3 Switch", "LINPUT3"},
+
+{"Right Input PGA", "RINPUT1 Switch", "RINPUT1"},
+{"Right Input PGA", "RINPUT2 Switch", "RINPUT2"},
+{"Right Input PGA", "RINPUT3 Switch", "RINPUT3"},
+
+{"Left Input Mixer", "LINPUT2 Switch", "LINPUT2"},
+{"Left Input Mixer", "LINPUT3 Switch", "LINPUT3"},
+{"Left Input Mixer", "AUX Switch", "AUX"},
+{"Left Input Mixer", "Input PGA Switch", "Left Input PGA"},
+
+{"Right Input Mixer", "RINPUT2 Switch", "RINPUT2"},
+{"Right Input Mixer", "RINPUT3 Switch", "RINPUT3"},
+{"Right Input Mixer", "AUX Switch", "AUX"},
+{"Right Input Mixer", "Input PGA Switch", "Right Input PGA"},
+
+{"ADCL", NULL, "Left Input Mixer"},
+{"ADCR", NULL, "Right Input Mixer"},
+
+/* Outputs */
+{"LINEOUT1L", NULL, "LINEOUT1L PGA"},
+{"LINEOUT1L PGA", NULL, "Left Output Mixer"},
+{"LINEOUT1R", NULL, "LINEOUT1R PGA"},
+{"LINEOUT1R PGA", NULL, "Right Output Mixer"},
+
+{"LINEOUT2L PGA", NULL, "Left Output Mixer"},
+{"LINEOUT2 LP", "Disabled", "LINEOUT2L PGA"},
+{"LINEOUT2 LP", "Enabled", "Left Output Mixer"},
+{"LINEOUT2L", NULL, "LINEOUT2 LP"},
+
+{"LINEOUT2R PGA", NULL, "Right Output Mixer"},
+{"LINEOUT2 LP", "Disabled", "LINEOUT2R PGA"},
+{"LINEOUT2 LP", "Enabled", "Right Output Mixer"},
+{"LINEOUT2R", NULL, "LINEOUT2 LP"},
+
+{"Left Output Mixer", "LINPUT3 Bypass Switch", "LINPUT3"},
+{"Left Output Mixer", "AUX Bypass Switch", "AUX"},
+{"Left Output Mixer", "Left Input Mixer Switch", "Left Input Mixer"},
+{"Left Output Mixer", "Right Input Mixer Switch", "Right Input Mixer"},
+{"Left Output Mixer", "DACL Switch", "DACL"},
+
+{"Right Output Mixer", "RINPUT3 Bypass Switch", "RINPUT3"},
+{"Right Output Mixer", "AUX Bypass Switch", "AUX"},
+{"Right Output Mixer", "Left Input Mixer Switch", "Left Input Mixer"},
+{"Right Output Mixer", "Right Input Mixer Switch", "Right Input Mixer"},
+{"Right Output Mixer", "DACR Switch", "DACR"},
+
+/* Note that the headphone output stage needs to be connected
+ * externally to LINEOUT2 via DC blocking capacitors.  Other
+ * configurations are not supported.
+ *
+ * Note also that left and right headphone paths are treated as a
+ * mono path.
+ */
+{"Headphone Amplifier", NULL, "LINEOUT2 LP"},
+{"Headphone Amplifier", NULL, "LINEOUT2 LP"},
+{"HP_L", NULL, "Headphone Amplifier"},
+{"HP_R", NULL, "Headphone Amplifier"},
+};
+
+static int wm8900_add_widgets(struct snd_soc_codec *codec)
+{
+	snd_soc_dapm_new_controls(codec, wm8900_dapm_widgets,
+				  ARRAY_SIZE(wm8900_dapm_widgets));
+
+	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+
+	snd_soc_dapm_new_widgets(codec);
+
+	return 0;
+}
+
+static int wm8900_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_device *socdev = rtd->socdev;
+	struct snd_soc_codec *codec = socdev->codec;
+	u16 reg;
+
+	reg = wm8900_read(codec, WM8900_REG_AUDIO1) & ~0x60;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		reg |= 0x20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		reg |= 0x40;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		reg |= 0x60;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	wm8900_write(codec, WM8900_REG_AUDIO1, reg);
+
+	return 0;
+}
+
+/* FLL divisors */
+struct _fll_div {
+	u16 fll_ratio;
+	u16 fllclk_div;
+	u16 fll_slow_lock_ref;
+	u16 n;
+	u16 k;
+};
+
+/* The size in bits of the FLL divide multiplied by 10
+ * to allow rounding later */
+#define FIXED_FLL_SIZE ((1 << 16) * 10)
+
+static int fll_factors(struct _fll_div *fll_div, unsigned int Fref,
+		       unsigned int Fout)
+{
+	u64 Kpart;
+	unsigned int K, Ndiv, Nmod, target;
+	unsigned int div;
+
+	BUG_ON(!Fout);
+
+	/* The FLL must run at 90-100MHz which is then scaled down to
+	 * the output value by FLLCLK_DIV. */
+	target = Fout;
+	div = 1;
+	while (target < 90000000) {
+		div *= 2;
+		target *= 2;
+	}
+
+	if (target > 100000000)
+		printk(KERN_WARNING "wm8900: FLL rate %d out of range, Fref=%d"
+		       " Fout=%d\n", target, Fref, Fout);
+	if (div > 32) {
+		printk(KERN_ERR "wm8900: Invalid FLL division rate %u, "
+		       "Fref=%d, Fout=%d, target=%d\n",
+		       div, Fref, Fout, target);
+		return -EINVAL;
+	}
+
+	fll_div->fllclk_div = div >> 2;
+
+	if (Fref < 48000)
+		fll_div->fll_slow_lock_ref = 1;
+	else
+		fll_div->fll_slow_lock_ref = 0;
+
+	Ndiv = target / Fref;
+
+	if (Fref < 1000000)
+		fll_div->fll_ratio = 8;
+	else
+		fll_div->fll_ratio = 1;
+
+	fll_div->n = Ndiv / fll_div->fll_ratio;
+	Nmod = (target / fll_div->fll_ratio) % Fref;
+
+	/* Calculate fractional part - scale up so we can round. */
+	Kpart = FIXED_FLL_SIZE * (long long)Nmod;
+
+	do_div(Kpart, Fref);
+
+	K = Kpart & 0xFFFFFFFF;
+
+	if ((K % 10) >= 5)
+		K += 5;
+
+	/* Move down to proper range now rounding is done */
+	fll_div->k = K / 10;
+
+	BUG_ON(target != Fout * (fll_div->fllclk_div << 2));
+	BUG_ON(!K && target != Fref * fll_div->fll_ratio * fll_div->n);
+
+	return 0;
+}
+
+static int wm8900_set_fll(struct snd_soc_codec *codec,
+	int fll_id, unsigned int freq_in, unsigned int freq_out)
+{
+	struct wm8900_priv *wm8900 = codec->private_data;
+	struct _fll_div fll_div;
+	unsigned int reg;
+
+	if (wm8900->fll_in == freq_in && wm8900->fll_out == freq_out)
+		return 0;
+
+	/* The digital side should be disabled during any change. */
+	reg = wm8900_read(codec, WM8900_REG_POWER1);
+	wm8900_write(codec, WM8900_REG_POWER1,
+		     reg & (~WM8900_REG_POWER1_FLL_ENA));
+
+	/* Disable the FLL? */
+	if (!freq_in || !freq_out) {
+		reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
+		wm8900_write(codec, WM8900_REG_CLOCKING1,
+			     reg & (~WM8900_REG_CLOCKING1_MCLK_SRC));
+
+		reg = wm8900_read(codec, WM8900_REG_FLLCTL1);
+		wm8900_write(codec, WM8900_REG_FLLCTL1,
+			     reg & (~WM8900_REG_FLLCTL1_OSC_ENA));
+
+		wm8900->fll_in = freq_in;
+		wm8900->fll_out = freq_out;
+
+		return 0;
+	}
+
+	if (fll_factors(&fll_div, freq_in, freq_out) != 0)
+		goto reenable;
+
+	wm8900->fll_in = freq_in;
+	wm8900->fll_out = freq_out;
+
+	/* The osclilator *MUST* be enabled before we enable the
+	 * digital circuit. */
+	wm8900_write(codec, WM8900_REG_FLLCTL1,
+		     fll_div.fll_ratio | WM8900_REG_FLLCTL1_OSC_ENA);
+
+	wm8900_write(codec, WM8900_REG_FLLCTL4, fll_div.n >> 5);
+	wm8900_write(codec, WM8900_REG_FLLCTL5,
+		     (fll_div.fllclk_div << 6) | (fll_div.n & 0x1f));
+
+	if (fll_div.k) {
+		wm8900_write(codec, WM8900_REG_FLLCTL2,
+			     (fll_div.k >> 8) | 0x100);
+		wm8900_write(codec, WM8900_REG_FLLCTL3, fll_div.k & 0xff);
+	} else
+		wm8900_write(codec, WM8900_REG_FLLCTL2, 0);
+
+	if (fll_div.fll_slow_lock_ref)
+		wm8900_write(codec, WM8900_REG_FLLCTL6,
+			     WM8900_REG_FLLCTL6_FLL_SLOW_LOCK_REF);
+	else
+		wm8900_write(codec, WM8900_REG_FLLCTL6, 0);
+
+	reg = wm8900_read(codec, WM8900_REG_POWER1);
+	wm8900_write(codec, WM8900_REG_POWER1,
+		     reg | WM8900_REG_POWER1_FLL_ENA);
+
+reenable:
+	reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
+	wm8900_write(codec, WM8900_REG_CLOCKING1,
+		     reg | WM8900_REG_CLOCKING1_MCLK_SRC);
+
+	return 0;
+}
+
+static int wm8900_set_dai_pll(struct snd_soc_dai *codec_dai,
+		int pll_id, unsigned int freq_in, unsigned int freq_out)
+{
+	return wm8900_set_fll(codec_dai->codec, pll_id, freq_in, freq_out);
+}
+
+static int wm8900_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
+				 int div_id, int div)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	unsigned int reg;
+
+	switch (div_id) {
+	case WM8900_BCLK_DIV:
+		reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
+		wm8900_write(codec, WM8900_REG_CLOCKING1,
+			     div | (reg & WM8900_REG_CLOCKING1_BCLK_MASK));
+		break;
+	case WM8900_OPCLK_DIV:
+		reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
+		wm8900_write(codec, WM8900_REG_CLOCKING1,
+			     div | (reg & WM8900_REG_CLOCKING1_OPCLK_MASK));
+		break;
+	case WM8900_DAC_LRCLK:
+		reg = wm8900_read(codec, WM8900_REG_AUDIO4);
+		wm8900_write(codec, WM8900_REG_AUDIO4,
+			     div | (reg & WM8900_LRC_MASK));
+		break;
+	case WM8900_ADC_LRCLK:
+		reg = wm8900_read(codec, WM8900_REG_AUDIO3);
+		wm8900_write(codec, WM8900_REG_AUDIO3,
+			     div | (reg & WM8900_LRC_MASK));
+		break;
+	case WM8900_DAC_CLKDIV:
+		reg = wm8900_read(codec, WM8900_REG_CLOCKING2);
+		wm8900_write(codec, WM8900_REG_CLOCKING2,
+			     div | (reg & WM8900_REG_CLOCKING2_DAC_CLKDIV));
+		break;
+	case WM8900_ADC_CLKDIV:
+		reg = wm8900_read(codec, WM8900_REG_CLOCKING2);
+		wm8900_write(codec, WM8900_REG_CLOCKING2,
+			     div | (reg & WM8900_REG_CLOCKING2_ADC_CLKDIV));
+		break;
+	case WM8900_LRCLK_MODE:
+		reg = wm8900_read(codec, WM8900_REG_DACCTRL);
+		wm8900_write(codec, WM8900_REG_DACCTRL,
+			     div | (reg & WM8900_REG_DACCTRL_AIF_LRCLKRATE));
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+
+static int wm8900_set_dai_fmt(struct snd_soc_dai *codec_dai,
+			      unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	unsigned int clocking1, aif1, aif3, aif4;
+
+	clocking1 = wm8900_read(codec, WM8900_REG_CLOCKING1);
+	aif1 = wm8900_read(codec, WM8900_REG_AUDIO1);
+	aif3 = wm8900_read(codec, WM8900_REG_AUDIO3);
+	aif4 = wm8900_read(codec, WM8900_REG_AUDIO4);
+
+	/* set master/slave audio interface */
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		clocking1 &= ~WM8900_REG_CLOCKING1_BCLK_DIR;
+		aif3 &= ~WM8900_REG_AUDIO3_ADCLRC_DIR;
+		aif4 &= ~WM8900_REG_AUDIO4_DACLRC_DIR;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+		clocking1 &= ~WM8900_REG_CLOCKING1_BCLK_DIR;
+		aif3 |= WM8900_REG_AUDIO3_ADCLRC_DIR;
+		aif4 |= WM8900_REG_AUDIO4_DACLRC_DIR;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		clocking1 |= WM8900_REG_CLOCKING1_BCLK_DIR;
+		aif3 |= WM8900_REG_AUDIO3_ADCLRC_DIR;
+		aif4 |= WM8900_REG_AUDIO4_DACLRC_DIR;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		clocking1 |= WM8900_REG_CLOCKING1_BCLK_DIR;
+		aif3 &= ~WM8900_REG_AUDIO3_ADCLRC_DIR;
+		aif4 &= ~WM8900_REG_AUDIO4_DACLRC_DIR;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_DSP_A:
+		aif1 |= WM8900_REG_AUDIO1_AIF_FMT_MASK;
+		aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		aif1 |= WM8900_REG_AUDIO1_AIF_FMT_MASK;
+		aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
+		aif1 |= 0x10;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
+		aif1 |= 0x8;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_DSP_A:
+	case SND_SOC_DAIFMT_DSP_B:
+		/* frame inversion not valid for DSP modes */
+		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+		case SND_SOC_DAIFMT_NB_NF:
+			aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
+			break;
+		case SND_SOC_DAIFMT_IB_NF:
+			aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+	case SND_SOC_DAIFMT_I2S:
+	case SND_SOC_DAIFMT_RIGHT_J:
+	case SND_SOC_DAIFMT_LEFT_J:
+		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+		case SND_SOC_DAIFMT_NB_NF:
+			aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
+			aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
+			break;
+		case SND_SOC_DAIFMT_IB_IF:
+			aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
+			aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
+			break;
+		case SND_SOC_DAIFMT_IB_NF:
+			aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
+			aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
+			break;
+		case SND_SOC_DAIFMT_NB_IF:
+			aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
+			aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	wm8900_write(codec, WM8900_REG_CLOCKING1, clocking1);
+	wm8900_write(codec, WM8900_REG_AUDIO1, aif1);
+	wm8900_write(codec, WM8900_REG_AUDIO3, aif3);
+	wm8900_write(codec, WM8900_REG_AUDIO4, aif4);
+
+	return 0;
+}
+
+static int wm8900_digital_mute(struct snd_soc_dai *codec_dai, int mute)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u16 reg;
+
+	reg = wm8900_read(codec, WM8900_REG_DACCTRL);
+
+	if (mute)
+		reg |= WM8900_REG_DACCTRL_MUTE;
+	else
+		reg &= ~WM8900_REG_DACCTRL_MUTE;
+
+	wm8900_write(codec, WM8900_REG_DACCTRL, reg);
+
+	return 0;
+}
+
+#define WM8900_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)
+
+#define WM8900_PCM_FORMATS \
+	(SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S20_3LE | \
+	 SNDRV_PCM_FORMAT_S24_LE)
+
+struct snd_soc_dai wm8900_dai = {
+	.name = "WM8900 HiFi",
+	.playback = {
+		.stream_name = "HiFi Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = WM8900_RATES,
+		.formats = WM8900_PCM_FORMATS,
+	},
+	.capture = {
+		.stream_name = "HiFi Capture",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = WM8900_RATES,
+		.formats = WM8900_PCM_FORMATS,
+	 },
+	.ops = {
+		.hw_params = wm8900_hw_params,
+	 },
+	.dai_ops = {
+		 .set_clkdiv = wm8900_set_dai_clkdiv,
+		 .set_pll = wm8900_set_dai_pll,
+		 .set_fmt = wm8900_set_dai_fmt,
+		 .digital_mute = wm8900_digital_mute,
+	 },
+};
+EXPORT_SYMBOL_GPL(wm8900_dai);
+
+static int wm8900_set_bias_level(struct snd_soc_codec *codec,
+				 enum snd_soc_bias_level level)
+{
+	u16 reg;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		/* Enable thermal shutdown */
+		reg = wm8900_read(codec, WM8900_REG_GPIO);
+		wm8900_write(codec, WM8900_REG_GPIO,
+			     reg | WM8900_REG_GPIO_TEMP_ENA);
+		reg = wm8900_read(codec, WM8900_REG_ADDCTL);
+		wm8900_write(codec, WM8900_REG_ADDCTL,
+			     reg | WM8900_REG_ADDCTL_TEMP_SD);
+		break;
+
+	case SND_SOC_BIAS_PREPARE:
+		break;
+
+	case SND_SOC_BIAS_STANDBY:
+		/* Charge capacitors if initial power up */
+		if (codec->bias_level == SND_SOC_BIAS_OFF) {
+			/* STARTUP_BIAS_ENA on */
+			wm8900_write(codec, WM8900_REG_POWER1,
+				     WM8900_REG_POWER1_STARTUP_BIAS_ENA);
+
+			/* Startup bias mode */
+			wm8900_write(codec, WM8900_REG_ADDCTL,
+				     WM8900_REG_ADDCTL_BIAS_SRC |
+				     WM8900_REG_ADDCTL_VMID_SOFTST);
+
+			/* VMID 2x50k */
+			wm8900_write(codec, WM8900_REG_POWER1,
+				     WM8900_REG_POWER1_STARTUP_BIAS_ENA | 0x1);
+
+			/* Allow capacitors to charge */
+			schedule_timeout_interruptible(msecs_to_jiffies(400));
+
+			/* Enable bias */
+			wm8900_write(codec, WM8900_REG_POWER1,
+				     WM8900_REG_POWER1_STARTUP_BIAS_ENA |
+				     WM8900_REG_POWER1_BIAS_ENA | 0x1);
+
+			wm8900_write(codec, WM8900_REG_ADDCTL, 0);
+
+			wm8900_write(codec, WM8900_REG_POWER1,
+				     WM8900_REG_POWER1_BIAS_ENA | 0x1);
+		}
+
+		reg = wm8900_read(codec, WM8900_REG_POWER1);
+		wm8900_write(codec, WM8900_REG_POWER1,
+			     (reg & WM8900_REG_POWER1_FLL_ENA) |
+			     WM8900_REG_POWER1_BIAS_ENA | 0x1);
+		wm8900_write(codec, WM8900_REG_POWER2,
+			     WM8900_REG_POWER2_SYSCLK_ENA);
+		wm8900_write(codec, WM8900_REG_POWER3, 0);
+		break;
+
+	case SND_SOC_BIAS_OFF:
+		/* Startup bias enable */
+		reg = wm8900_read(codec, WM8900_REG_POWER1);
+		wm8900_write(codec, WM8900_REG_POWER1,
+			     reg & WM8900_REG_POWER1_STARTUP_BIAS_ENA);
+		wm8900_write(codec, WM8900_REG_ADDCTL,
+			     WM8900_REG_ADDCTL_BIAS_SRC |
+			     WM8900_REG_ADDCTL_VMID_SOFTST);
+
+		/* Discharge caps */
+		wm8900_write(codec, WM8900_REG_POWER1,
+			     WM8900_REG_POWER1_STARTUP_BIAS_ENA);
+		schedule_timeout_interruptible(msecs_to_jiffies(500));
+
+		/* Remove clamp */
+		wm8900_write(codec, WM8900_REG_HPCTL1, 0);
+
+		/* Power down */
+		wm8900_write(codec, WM8900_REG_ADDCTL, 0);
+		wm8900_write(codec, WM8900_REG_POWER1, 0);
+		wm8900_write(codec, WM8900_REG_POWER2, 0);
+		wm8900_write(codec, WM8900_REG_POWER3, 0);
+
+		/* Need to let things settle before stopping the clock
+		 * to ensure that restart works, see "Stopping the
+		 * master clock" in the datasheet. */
+		schedule_timeout_interruptible(msecs_to_jiffies(1));
+		wm8900_write(codec, WM8900_REG_POWER2,
+			     WM8900_REG_POWER2_SYSCLK_ENA);
+		break;
+	}
+	codec->bias_level = level;
+	return 0;
+}
+
+static int wm8900_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;
+	struct wm8900_priv *wm8900 = codec->private_data;
+	int fll_out = wm8900->fll_out;
+	int fll_in  = wm8900->fll_in;
+	int ret;
+
+	/* Stop the FLL in an orderly fashion */
+	ret = wm8900_set_fll(codec, 0, 0, 0);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "Failed to stop FLL\n");
+		return ret;
+	}
+
+	wm8900->fll_out = fll_out;
+	wm8900->fll_in = fll_in;
+
+	wm8900_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	return 0;
+}
+
+static int wm8900_resume(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec = socdev->codec;
+	struct wm8900_priv *wm8900 = codec->private_data;
+	u16 *cache;
+	int i, ret;
+
+	cache = kmemdup(codec->reg_cache, sizeof(wm8900_reg_defaults),
+			GFP_KERNEL);
+
+	wm8900_reset(codec);
+	wm8900_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	/* Restart the FLL? */
+	if (wm8900->fll_out) {
+		int fll_out = wm8900->fll_out;
+		int fll_in  = wm8900->fll_in;
+
+		wm8900->fll_in = 0;
+		wm8900->fll_out = 0;
+
+		ret = wm8900_set_fll(codec, 0, fll_in, fll_out);
+		if (ret != 0) {
+			dev_err(&pdev->dev, "Failed to restart FLL\n");
+			return ret;
+		}
+	}
+
+	if (cache) {
+		for (i = 0; i < WM8900_MAXREG; i++)
+			wm8900_write(codec, i, cache[i]);
+		kfree(cache);
+	} else
+		dev_err(&pdev->dev, "Unable to allocate register cache\n");
+
+	return 0;
+}
+
+/*
+ * initialise the WM8900 driver
+ * register the mixer and dsp interfaces with the kernel
+ */
+static int wm8900_init(struct snd_soc_device *socdev)
+{
+	struct snd_soc_codec *codec = socdev->codec;
+	int ret = 0;
+	unsigned int reg;
+	struct i2c_client *i2c_client = socdev->codec->control_data;
+
+	codec->name = "WM8900";
+	codec->owner = THIS_MODULE;
+	codec->read = wm8900_read;
+	codec->write = wm8900_write;
+	codec->dai = &wm8900_dai;
+	codec->num_dai = 1;
+	codec->reg_cache_size = WM8900_MAXREG;
+	codec->reg_cache = kmemdup(wm8900_reg_defaults,
+				   sizeof(wm8900_reg_defaults), GFP_KERNEL);
+
+	if (codec->reg_cache == NULL)
+		return -ENOMEM;
+
+	reg = wm8900_read(codec, WM8900_REG_ID);
+	if (reg != 0x8900) {
+		dev_err(&i2c_client->dev, "Device is not a WM8900 - ID %x\n",
+			reg);
+		return -ENODEV;
+	}
+
+	codec->private_data = kzalloc(sizeof(struct wm8900_priv), GFP_KERNEL);
+	if (codec->private_data == NULL) {
+		ret = -ENOMEM;
+		goto priv_err;
+	}
+
+	/* Read back from the chip */
+	reg = wm8900_chip_read(codec, WM8900_REG_POWER1);
+	reg = (reg >> 12) & 0xf;
+	dev_info(&i2c_client->dev, "WM8900 revision %d\n", reg);
+
+	wm8900_reset(codec);
+
+	/* Latch the volume update bits */
+	wm8900_write(codec, WM8900_REG_LINVOL,
+		     wm8900_read(codec, WM8900_REG_LINVOL) | 0x100);
+	wm8900_write(codec, WM8900_REG_RINVOL,
+		     wm8900_read(codec, WM8900_REG_RINVOL) | 0x100);
+	wm8900_write(codec, WM8900_REG_LOUT1CTL,
+		     wm8900_read(codec, WM8900_REG_LOUT1CTL) | 0x100);
+	wm8900_write(codec, WM8900_REG_ROUT1CTL,
+		     wm8900_read(codec, WM8900_REG_ROUT1CTL) | 0x100);
+	wm8900_write(codec, WM8900_REG_LOUT2CTL,
+		     wm8900_read(codec, WM8900_REG_LOUT2CTL) | 0x100);
+	wm8900_write(codec, WM8900_REG_ROUT2CTL,
+		     wm8900_read(codec, WM8900_REG_ROUT2CTL) | 0x100);
+	wm8900_write(codec, WM8900_REG_LDAC_DV,
+		     wm8900_read(codec, WM8900_REG_LDAC_DV) | 0x100);
+	wm8900_write(codec, WM8900_REG_RDAC_DV,
+		     wm8900_read(codec, WM8900_REG_RDAC_DV) | 0x100);
+	wm8900_write(codec, WM8900_REG_LADC_DV,
+		     wm8900_read(codec, WM8900_REG_LADC_DV) | 0x100);
+	wm8900_write(codec, WM8900_REG_RADC_DV,
+		     wm8900_read(codec, WM8900_REG_RADC_DV) | 0x100);
+
+	/* Set the DAC and mixer output bias */
+	wm8900_write(codec, WM8900_REG_OUTBIASCTL, 0x81);
+
+	/* Register pcms */
+	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+	if (ret < 0) {
+		dev_err(&i2c_client->dev, "Failed to register new PCMs\n");
+		goto pcm_err;
+	}
+
+	/* Turn the chip on */
+	codec->bias_level = SND_SOC_BIAS_OFF;
+	wm8900_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	wm8900_add_controls(codec);
+	wm8900_add_widgets(codec);
+
+	ret = snd_soc_register_card(socdev);
+	if (ret < 0) {
+		dev_err(&i2c_client->dev, "Failed to register card\n");
+		goto card_err;
+	}
+	return ret;
+
+card_err:
+	snd_soc_free_pcms(socdev);
+	snd_soc_dapm_free(socdev);
+pcm_err:
+	kfree(codec->reg_cache);
+priv_err:
+	kfree(codec->private_data);
+	return ret;
+}
+
+static struct snd_soc_device *wm8900_socdev;
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+
+static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
+
+/* Magic definition of all other variables and things */
+I2C_CLIENT_INSMOD;
+
+static struct i2c_driver wm8900_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 wm8900_codec_probe(struct i2c_adapter *adap, int addr, int kind)
+{
+	struct snd_soc_device *socdev = wm8900_socdev;
+	struct wm8900_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;
+
+	dev_err(&adap->dev, "Probe on %x\n", addr);
+
+	client_template.adapter = adap;
+	client_template.addr = addr;
+
+	i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
+	if (i2c == NULL) {
+		kfree(codec);
+		return -ENOMEM;
+	}
+	i2c_set_clientdata(i2c, codec);
+	codec->control_data = i2c;
+
+	ret = i2c_attach_client(i2c);
+	if (ret < 0) {
+		dev_err(&adap->dev,
+			"failed to attach codec at addr %x\n", addr);
+		goto err;
+	}
+
+	ret = wm8900_init(socdev);
+	if (ret < 0) {
+		dev_err(&adap->dev, "failed to initialise WM8900\n");
+		goto err;
+	}
+	return ret;
+
+err:
+	kfree(codec);
+	kfree(i2c);
+	return ret;
+}
+
+static int wm8900_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 wm8900_i2c_attach(struct i2c_adapter *adap)
+{
+	return i2c_probe(adap, &addr_data, wm8900_codec_probe);
+}
+
+/* corgi i2c codec control layer */
+static struct i2c_driver wm8900_i2c_driver = {
+	.driver = {
+		.name = "WM8900 I2C codec",
+		.owner = THIS_MODULE,
+	},
+	.attach_adapter = wm8900_i2c_attach,
+	.detach_client =  wm8900_i2c_detach,
+	.command =        NULL,
+};
+
+static struct i2c_client client_template = {
+	.name =   "WM8900",
+	.driver = &wm8900_i2c_driver,
+};
+#endif
+
+static int wm8900_probe(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct wm8900_setup_data *setup;
+	struct snd_soc_codec *codec;
+	int ret = 0;
+
+	dev_info(&pdev->dev, "WM8900 Audio Codec\n");
+
+	setup = socdev->codec_data;
+	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+	if (codec == NULL)
+		return -ENOMEM;
+
+	mutex_init(&codec->mutex);
+	INIT_LIST_HEAD(&codec->dapm_widgets);
+	INIT_LIST_HEAD(&codec->dapm_paths);
+
+	socdev->codec = codec;
+
+	codec->set_bias_level = wm8900_set_bias_level;
+
+	wm8900_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(&wm8900_i2c_driver);
+		if (ret != 0)
+			printk(KERN_ERR "can't add i2c driver");
+	}
+#else
+#error Non-I2C interfaces not yet supported
+#endif
+	return ret;
+}
+
+/* power down chip */
+static int wm8900_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)
+		wm8900_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	snd_soc_free_pcms(socdev);
+	snd_soc_dapm_free(socdev);
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	i2c_del_driver(&wm8900_i2c_driver);
+#endif
+	kfree(codec);
+
+	return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8900 = {
+	.probe = 	wm8900_probe,
+	.remove = 	wm8900_remove,
+	.suspend = 	wm8900_suspend,
+	.resume =	wm8900_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8900);
+
+MODULE_DESCRIPTION("ASoC WM8900 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
+MODULE_LICENSE("GPL");