sound/soc/codecs/arizona.c

/*
 * arizona.c - Wolfson Arizona class device shared support
 *
 * Copyright 2012 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.
 */

#include <linux/delay.h>
#include <linux/gcd.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/gpio.h>
#include <linux/mfd/arizona/registers.h>

#include "arizona.h"

#define ARIZONA_AIF_BCLK_CTRL                   0x00
#define ARIZONA_AIF_TX_PIN_CTRL                 0x01
#define ARIZONA_AIF_RX_PIN_CTRL                 0x02
#define ARIZONA_AIF_RATE_CTRL                   0x03
#define ARIZONA_AIF_FORMAT                      0x04
#define ARIZONA_AIF_TX_BCLK_RATE                0x05
#define ARIZONA_AIF_RX_BCLK_RATE                0x06
#define ARIZONA_AIF_FRAME_CTRL_1                0x07
#define ARIZONA_AIF_FRAME_CTRL_2                0x08
#define ARIZONA_AIF_FRAME_CTRL_3                0x09
#define ARIZONA_AIF_FRAME_CTRL_4                0x0A
#define ARIZONA_AIF_FRAME_CTRL_5                0x0B
#define ARIZONA_AIF_FRAME_CTRL_6                0x0C
#define ARIZONA_AIF_FRAME_CTRL_7                0x0D
#define ARIZONA_AIF_FRAME_CTRL_8                0x0E
#define ARIZONA_AIF_FRAME_CTRL_9                0x0F
#define ARIZONA_AIF_FRAME_CTRL_10               0x10
#define ARIZONA_AIF_FRAME_CTRL_11               0x11
#define ARIZONA_AIF_FRAME_CTRL_12               0x12
#define ARIZONA_AIF_FRAME_CTRL_13               0x13
#define ARIZONA_AIF_FRAME_CTRL_14               0x14
#define ARIZONA_AIF_FRAME_CTRL_15               0x15
#define ARIZONA_AIF_FRAME_CTRL_16               0x16
#define ARIZONA_AIF_FRAME_CTRL_17               0x17
#define ARIZONA_AIF_FRAME_CTRL_18               0x18
#define ARIZONA_AIF_TX_ENABLES                  0x19
#define ARIZONA_AIF_RX_ENABLES                  0x1A
#define ARIZONA_AIF_FORCE_WRITE                 0x1B

#define ARIZONA_FLL_VCO_CORNER 141900000
#define ARIZONA_FLL_MAX_FREF   13500000
#define ARIZONA_FLL_MIN_FVCO   90000000
#define ARIZONA_FLL_MAX_FRATIO 16
#define ARIZONA_FLL_MAX_REFDIV 8
#define ARIZONA_FLL_MIN_OUTDIV 2
#define ARIZONA_FLL_MAX_OUTDIV 7

#define ARIZONA_FMT_DSP_MODE_A          0
#define ARIZONA_FMT_DSP_MODE_B          1
#define ARIZONA_FMT_I2S_MODE            2
#define ARIZONA_FMT_LEFT_JUSTIFIED_MODE 3

#define arizona_fll_err(_fll, fmt, ...) \
	dev_err(_fll->arizona->dev, "FLL%d: " fmt, _fll->id, ##__VA_ARGS__)
#define arizona_fll_warn(_fll, fmt, ...) \
	dev_warn(_fll->arizona->dev, "FLL%d: " fmt, _fll->id, ##__VA_ARGS__)
#define arizona_fll_dbg(_fll, fmt, ...) \
	dev_dbg(_fll->arizona->dev, "FLL%d: " fmt, _fll->id, ##__VA_ARGS__)

#define arizona_aif_err(_dai, fmt, ...) \
	dev_err(_dai->dev, "AIF%d: " fmt, _dai->id, ##__VA_ARGS__)
#define arizona_aif_warn(_dai, fmt, ...) \
	dev_warn(_dai->dev, "AIF%d: " fmt, _dai->id, ##__VA_ARGS__)
#define arizona_aif_dbg(_dai, fmt, ...) \
	dev_dbg(_dai->dev, "AIF%d: " fmt, _dai->id, ##__VA_ARGS__)

static int arizona_spk_ev(struct snd_soc_dapm_widget *w,
			  struct snd_kcontrol *kcontrol,
			  int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct arizona *arizona = dev_get_drvdata(codec->dev->parent);
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	bool manual_ena = false;
	int val;

	switch (arizona->type) {
	case WM5102:
		switch (arizona->rev) {
		case 0:
			break;
		default:
			manual_ena = true;
			break;
		}
	default:
		break;
	}

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		if (!priv->spk_ena && manual_ena) {
			regmap_write_async(arizona->regmap, 0x4f5, 0x25a);
			priv->spk_ena_pending = true;
		}
		break;
	case SND_SOC_DAPM_POST_PMU:
		val = snd_soc_read(codec, ARIZONA_INTERRUPT_RAW_STATUS_3);
		if (val & ARIZONA_SPK_OVERHEAT_STS) {
			dev_crit(arizona->dev,
				 "Speaker not enabled due to temperature\n");
			return -EBUSY;
		}

		regmap_update_bits_async(arizona->regmap,
					 ARIZONA_OUTPUT_ENABLES_1,
					 1 << w->shift, 1 << w->shift);

		if (priv->spk_ena_pending) {
			msleep(75);
			regmap_write_async(arizona->regmap, 0x4f5, 0xda);
			priv->spk_ena_pending = false;
			priv->spk_ena++;
		}
		break;
	case SND_SOC_DAPM_PRE_PMD:
		if (manual_ena) {
			priv->spk_ena--;
			if (!priv->spk_ena)
				regmap_write_async(arizona->regmap,
						   0x4f5, 0x25a);
		}

		regmap_update_bits_async(arizona->regmap,
					 ARIZONA_OUTPUT_ENABLES_1,
					 1 << w->shift, 0);
		break;
	case SND_SOC_DAPM_POST_PMD:
		if (manual_ena) {
			if (!priv->spk_ena)
				regmap_write_async(arizona->regmap,
						   0x4f5, 0x0da);
		}
		break;
	}

	return 0;
}

static irqreturn_t arizona_thermal_warn(int irq, void *data)
{
	struct arizona *arizona = data;
	unsigned int val;
	int ret;

	ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_3,
			  &val);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read thermal status: %d\n",
			ret);
	} else if (val & ARIZONA_SPK_OVERHEAT_WARN_STS) {
		dev_crit(arizona->dev, "Thermal warning\n");
	}

	return IRQ_HANDLED;
}

static irqreturn_t arizona_thermal_shutdown(int irq, void *data)
{
	struct arizona *arizona = data;
	unsigned int val;
	int ret;

	ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_3,
			  &val);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read thermal status: %d\n",
			ret);
	} else if (val & ARIZONA_SPK_OVERHEAT_STS) {
		dev_crit(arizona->dev, "Thermal shutdown\n");
		ret = regmap_update_bits(arizona->regmap,
					 ARIZONA_OUTPUT_ENABLES_1,
					 ARIZONA_OUT4L_ENA |
					 ARIZONA_OUT4R_ENA, 0);
		if (ret != 0)
			dev_crit(arizona->dev,
				 "Failed to disable speaker outputs: %d\n",
				 ret);
	}

	return IRQ_HANDLED;
}

static const struct snd_soc_dapm_widget arizona_spkl =
	SND_SOC_DAPM_PGA_E("OUT4L", SND_SOC_NOPM,
			   ARIZONA_OUT4L_ENA_SHIFT, 0, NULL, 0, arizona_spk_ev,
			   SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMU);

static const struct snd_soc_dapm_widget arizona_spkr =
	SND_SOC_DAPM_PGA_E("OUT4R", SND_SOC_NOPM,
			   ARIZONA_OUT4R_ENA_SHIFT, 0, NULL, 0, arizona_spk_ev,
			   SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMU);

int arizona_init_spk(struct snd_soc_codec *codec)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int ret;

	ret = snd_soc_dapm_new_controls(&codec->dapm, &arizona_spkl, 1);
	if (ret != 0)
		return ret;

	switch (arizona->type) {
	case WM8997:
		break;
	default:
		ret = snd_soc_dapm_new_controls(&codec->dapm,
						&arizona_spkr, 1);
		if (ret != 0)
			return ret;
		break;
	}

	ret = arizona_request_irq(arizona, ARIZONA_IRQ_SPK_OVERHEAT_WARN,
				  "Thermal warning", arizona_thermal_warn,
				  arizona);
	if (ret != 0)
		dev_err(arizona->dev,
			"Failed to get thermal warning IRQ: %d\n",
			ret);

	ret = arizona_request_irq(arizona, ARIZONA_IRQ_SPK_OVERHEAT,
				  "Thermal shutdown", arizona_thermal_shutdown,
				  arizona);
	if (ret != 0)
		dev_err(arizona->dev,
			"Failed to get thermal shutdown IRQ: %d\n",
			ret);

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_init_spk);

static const struct snd_soc_dapm_route arizona_mono_routes[] = {
	{ "OUT1R", NULL, "OUT1L" },
	{ "OUT2R", NULL, "OUT2L" },
	{ "OUT3R", NULL, "OUT3L" },
	{ "OUT4R", NULL, "OUT4L" },
	{ "OUT5R", NULL, "OUT5L" },
	{ "OUT6R", NULL, "OUT6L" },
};

int arizona_init_mono(struct snd_soc_codec *codec)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int i;

	for (i = 0; i < ARIZONA_MAX_OUTPUT; ++i) {
		if (arizona->pdata.out_mono[i])
			snd_soc_dapm_add_routes(&codec->dapm,
						&arizona_mono_routes[i], 1);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_init_mono);

int arizona_init_gpio(struct snd_soc_codec *codec)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int i;

	switch (arizona->type) {
	case WM5110:
		snd_soc_dapm_disable_pin(&codec->dapm, "DRC2 Signal Activity");
		break;
	default:
		break;
	}

	snd_soc_dapm_disable_pin(&codec->dapm, "DRC1 Signal Activity");

	for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
		switch (arizona->pdata.gpio_defaults[i] & ARIZONA_GPN_FN_MASK) {
		case ARIZONA_GP_FN_DRC1_SIGNAL_DETECT:
			snd_soc_dapm_enable_pin(&codec->dapm,
						"DRC1 Signal Activity");
			break;
		case ARIZONA_GP_FN_DRC2_SIGNAL_DETECT:
			snd_soc_dapm_enable_pin(&codec->dapm,
						"DRC2 Signal Activity");
			break;
		default:
			break;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_init_gpio);

const char *arizona_mixer_texts[ARIZONA_NUM_MIXER_INPUTS] = {
	"None",
	"Tone Generator 1",
	"Tone Generator 2",
	"Haptics",
	"AEC",
	"Mic Mute Mixer",
	"Noise Generator",
	"IN1L",
	"IN1R",
	"IN2L",
	"IN2R",
	"IN3L",
	"IN3R",
	"IN4L",
	"IN4R",
	"AIF1RX1",
	"AIF1RX2",
	"AIF1RX3",
	"AIF1RX4",
	"AIF1RX5",
	"AIF1RX6",
	"AIF1RX7",
	"AIF1RX8",
	"AIF2RX1",
	"AIF2RX2",
	"AIF2RX3",
	"AIF2RX4",
	"AIF2RX5",
	"AIF2RX6",
	"AIF3RX1",
	"AIF3RX2",
	"SLIMRX1",
	"SLIMRX2",
	"SLIMRX3",
	"SLIMRX4",
	"SLIMRX5",
	"SLIMRX6",
	"SLIMRX7",
	"SLIMRX8",
	"EQ1",
	"EQ2",
	"EQ3",
	"EQ4",
	"DRC1L",
	"DRC1R",
	"DRC2L",
	"DRC2R",
	"LHPF1",
	"LHPF2",
	"LHPF3",
	"LHPF4",
	"DSP1.1",
	"DSP1.2",
	"DSP1.3",
	"DSP1.4",
	"DSP1.5",
	"DSP1.6",
	"DSP2.1",
	"DSP2.2",
	"DSP2.3",
	"DSP2.4",
	"DSP2.5",
	"DSP2.6",
	"DSP3.1",
	"DSP3.2",
	"DSP3.3",
	"DSP3.4",
	"DSP3.5",
	"DSP3.6",
	"DSP4.1",
	"DSP4.2",
	"DSP4.3",
	"DSP4.4",
	"DSP4.5",
	"DSP4.6",
	"ASRC1L",
	"ASRC1R",
	"ASRC2L",
	"ASRC2R",
	"ISRC1INT1",
	"ISRC1INT2",
	"ISRC1INT3",
	"ISRC1INT4",
	"ISRC1DEC1",
	"ISRC1DEC2",
	"ISRC1DEC3",
	"ISRC1DEC4",
	"ISRC2INT1",
	"ISRC2INT2",
	"ISRC2INT3",
	"ISRC2INT4",
	"ISRC2DEC1",
	"ISRC2DEC2",
	"ISRC2DEC3",
	"ISRC2DEC4",
	"ISRC3INT1",
	"ISRC3INT2",
	"ISRC3INT3",
	"ISRC3INT4",
	"ISRC3DEC1",
	"ISRC3DEC2",
	"ISRC3DEC3",
	"ISRC3DEC4",
};
EXPORT_SYMBOL_GPL(arizona_mixer_texts);

int arizona_mixer_values[ARIZONA_NUM_MIXER_INPUTS] = {
	0x00,  /* None */
	0x04,  /* Tone */
	0x05,
	0x06,  /* Haptics */
	0x08,  /* AEC */
	0x0c,  /* Noise mixer */
	0x0d,  /* Comfort noise */
	0x10,  /* IN1L */
	0x11,
	0x12,
	0x13,
	0x14,
	0x15,
	0x16,
	0x17,
	0x20,  /* AIF1RX1 */
	0x21,
	0x22,
	0x23,
	0x24,
	0x25,
	0x26,
	0x27,
	0x28,  /* AIF2RX1 */
	0x29,
	0x2a,
	0x2b,
	0x2c,
	0x2d,
	0x30,  /* AIF3RX1 */
	0x31,
	0x38,  /* SLIMRX1 */
	0x39,
	0x3a,
	0x3b,
	0x3c,
	0x3d,
	0x3e,
	0x3f,
	0x50,  /* EQ1 */
	0x51,
	0x52,
	0x53,
	0x58,  /* DRC1L */
	0x59,
	0x5a,
	0x5b,
	0x60,  /* LHPF1 */
	0x61,
	0x62,
	0x63,
	0x68,  /* DSP1.1 */
	0x69,
	0x6a,
	0x6b,
	0x6c,
	0x6d,
	0x70,  /* DSP2.1 */
	0x71,
	0x72,
	0x73,
	0x74,
	0x75,
	0x78,  /* DSP3.1 */
	0x79,
	0x7a,
	0x7b,
	0x7c,
	0x7d,
	0x80,  /* DSP4.1 */
	0x81,
	0x82,
	0x83,
	0x84,
	0x85,
	0x90,  /* ASRC1L */
	0x91,
	0x92,
	0x93,
	0xa0,  /* ISRC1INT1 */
	0xa1,
	0xa2,
	0xa3,
	0xa4,  /* ISRC1DEC1 */
	0xa5,
	0xa6,
	0xa7,
	0xa8,  /* ISRC2DEC1 */
	0xa9,
	0xaa,
	0xab,
	0xac,  /* ISRC2INT1 */
	0xad,
	0xae,
	0xaf,
	0xb0,  /* ISRC3DEC1 */
	0xb1,
	0xb2,
	0xb3,
	0xb4,  /* ISRC3INT1 */
	0xb5,
	0xb6,
	0xb7,
};
EXPORT_SYMBOL_GPL(arizona_mixer_values);

const DECLARE_TLV_DB_SCALE(arizona_mixer_tlv, -3200, 100, 0);
EXPORT_SYMBOL_GPL(arizona_mixer_tlv);

const char *arizona_rate_text[ARIZONA_RATE_ENUM_SIZE] = {
	"SYNCCLK rate", "8kHz", "16kHz", "ASYNCCLK rate",
};
EXPORT_SYMBOL_GPL(arizona_rate_text);

const int arizona_rate_val[ARIZONA_RATE_ENUM_SIZE] = {
	0, 1, 2, 8,
};
EXPORT_SYMBOL_GPL(arizona_rate_val);


const struct soc_enum arizona_isrc_fsh[] = {
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_1_CTRL_1,
			      ARIZONA_ISRC1_FSH_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_2_CTRL_1,
			      ARIZONA_ISRC2_FSH_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_3_CTRL_1,
			      ARIZONA_ISRC3_FSH_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
};
EXPORT_SYMBOL_GPL(arizona_isrc_fsh);

const struct soc_enum arizona_isrc_fsl[] = {
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_1_CTRL_2,
			      ARIZONA_ISRC1_FSL_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_2_CTRL_2,
			      ARIZONA_ISRC2_FSL_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ISRC_3_CTRL_2,
			      ARIZONA_ISRC3_FSL_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE,
			      arizona_rate_text, arizona_rate_val),
};
EXPORT_SYMBOL_GPL(arizona_isrc_fsl);

const struct soc_enum arizona_asrc_rate1 =
	SOC_VALUE_ENUM_SINGLE(ARIZONA_ASRC_RATE1,
			      ARIZONA_ASRC_RATE1_SHIFT, 0xf,
			      ARIZONA_RATE_ENUM_SIZE - 1,
			      arizona_rate_text, arizona_rate_val);
EXPORT_SYMBOL_GPL(arizona_asrc_rate1);

static const char *arizona_vol_ramp_text[] = {
	"0ms/6dB", "0.5ms/6dB", "1ms/6dB", "2ms/6dB", "4ms/6dB", "8ms/6dB",
	"15ms/6dB", "30ms/6dB",
};

SOC_ENUM_SINGLE_DECL(arizona_in_vd_ramp,
		     ARIZONA_INPUT_VOLUME_RAMP,
		     ARIZONA_IN_VD_RAMP_SHIFT,
		     arizona_vol_ramp_text);
EXPORT_SYMBOL_GPL(arizona_in_vd_ramp);

SOC_ENUM_SINGLE_DECL(arizona_in_vi_ramp,
		     ARIZONA_INPUT_VOLUME_RAMP,
		     ARIZONA_IN_VI_RAMP_SHIFT,
		     arizona_vol_ramp_text);
EXPORT_SYMBOL_GPL(arizona_in_vi_ramp);

SOC_ENUM_SINGLE_DECL(arizona_out_vd_ramp,
		     ARIZONA_OUTPUT_VOLUME_RAMP,
		     ARIZONA_OUT_VD_RAMP_SHIFT,
		     arizona_vol_ramp_text);
EXPORT_SYMBOL_GPL(arizona_out_vd_ramp);

SOC_ENUM_SINGLE_DECL(arizona_out_vi_ramp,
		     ARIZONA_OUTPUT_VOLUME_RAMP,
		     ARIZONA_OUT_VI_RAMP_SHIFT,
		     arizona_vol_ramp_text);
EXPORT_SYMBOL_GPL(arizona_out_vi_ramp);

static const char *arizona_lhpf_mode_text[] = {
	"Low-pass", "High-pass"
};

SOC_ENUM_SINGLE_DECL(arizona_lhpf1_mode,
		     ARIZONA_HPLPF1_1,
		     ARIZONA_LHPF1_MODE_SHIFT,
		     arizona_lhpf_mode_text);
EXPORT_SYMBOL_GPL(arizona_lhpf1_mode);

SOC_ENUM_SINGLE_DECL(arizona_lhpf2_mode,
		     ARIZONA_HPLPF2_1,
		     ARIZONA_LHPF2_MODE_SHIFT,
		     arizona_lhpf_mode_text);
EXPORT_SYMBOL_GPL(arizona_lhpf2_mode);

SOC_ENUM_SINGLE_DECL(arizona_lhpf3_mode,
		     ARIZONA_HPLPF3_1,
		     ARIZONA_LHPF3_MODE_SHIFT,
		     arizona_lhpf_mode_text);
EXPORT_SYMBOL_GPL(arizona_lhpf3_mode);

SOC_ENUM_SINGLE_DECL(arizona_lhpf4_mode,
		     ARIZONA_HPLPF4_1,
		     ARIZONA_LHPF4_MODE_SHIFT,
		     arizona_lhpf_mode_text);
EXPORT_SYMBOL_GPL(arizona_lhpf4_mode);

static const char *arizona_ng_hold_text[] = {
	"30ms", "120ms", "250ms", "500ms",
};

SOC_ENUM_SINGLE_DECL(arizona_ng_hold,
		     ARIZONA_NOISE_GATE_CONTROL,
		     ARIZONA_NGATE_HOLD_SHIFT,
		     arizona_ng_hold_text);
EXPORT_SYMBOL_GPL(arizona_ng_hold);

static const char * const arizona_in_hpf_cut_text[] = {
	"2.5Hz", "5Hz", "10Hz", "20Hz", "40Hz"
};

SOC_ENUM_SINGLE_DECL(arizona_in_hpf_cut_enum,
		     ARIZONA_HPF_CONTROL,
		     ARIZONA_IN_HPF_CUT_SHIFT,
		     arizona_in_hpf_cut_text);
EXPORT_SYMBOL_GPL(arizona_in_hpf_cut_enum);

static const char * const arizona_in_dmic_osr_text[] = {
	"1.536MHz", "3.072MHz", "6.144MHz", "768kHz",
};

const struct soc_enum arizona_in_dmic_osr[] = {
	SOC_ENUM_SINGLE(ARIZONA_IN1L_CONTROL, ARIZONA_IN1_OSR_SHIFT,
			ARRAY_SIZE(arizona_in_dmic_osr_text),
			arizona_in_dmic_osr_text),
	SOC_ENUM_SINGLE(ARIZONA_IN2L_CONTROL, ARIZONA_IN2_OSR_SHIFT,
			ARRAY_SIZE(arizona_in_dmic_osr_text),
			arizona_in_dmic_osr_text),
	SOC_ENUM_SINGLE(ARIZONA_IN3L_CONTROL, ARIZONA_IN3_OSR_SHIFT,
			ARRAY_SIZE(arizona_in_dmic_osr_text),
			arizona_in_dmic_osr_text),
	SOC_ENUM_SINGLE(ARIZONA_IN4L_CONTROL, ARIZONA_IN4_OSR_SHIFT,
			ARRAY_SIZE(arizona_in_dmic_osr_text),
			arizona_in_dmic_osr_text),
};
EXPORT_SYMBOL_GPL(arizona_in_dmic_osr);

static void arizona_in_set_vu(struct snd_soc_codec *codec, int ena)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	unsigned int val;
	int i;

	if (ena)
		val = ARIZONA_IN_VU;
	else
		val = 0;

	for (i = 0; i < priv->num_inputs; i++)
		snd_soc_update_bits(codec,
				    ARIZONA_ADC_DIGITAL_VOLUME_1L + (i * 4),
				    ARIZONA_IN_VU, val);
}

int arizona_in_ev(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
		  int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	unsigned int reg;

	if (w->shift % 2)
		reg = ARIZONA_ADC_DIGITAL_VOLUME_1L + ((w->shift / 2) * 8);
	else
		reg = ARIZONA_ADC_DIGITAL_VOLUME_1R + ((w->shift / 2) * 8);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		priv->in_pending++;
		break;
	case SND_SOC_DAPM_POST_PMU:
		snd_soc_update_bits(codec, reg, ARIZONA_IN1L_MUTE, 0);

		/* If this is the last input pending then allow VU */
		priv->in_pending--;
		if (priv->in_pending == 0) {
			msleep(1);
			arizona_in_set_vu(codec, 1);
		}
		break;
	case SND_SOC_DAPM_PRE_PMD:
		snd_soc_update_bits(codec, reg,
				    ARIZONA_IN1L_MUTE | ARIZONA_IN_VU,
				    ARIZONA_IN1L_MUTE | ARIZONA_IN_VU);
		break;
	case SND_SOC_DAPM_POST_PMD:
		/* Disable volume updates if no inputs are enabled */
		reg = snd_soc_read(codec, ARIZONA_INPUT_ENABLES);
		if (reg == 0)
			arizona_in_set_vu(codec, 0);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_in_ev);

int arizona_out_ev(struct snd_soc_dapm_widget *w,
		   struct snd_kcontrol *kcontrol,
		   int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		switch (w->shift) {
		case ARIZONA_OUT1L_ENA_SHIFT:
		case ARIZONA_OUT1R_ENA_SHIFT:
		case ARIZONA_OUT2L_ENA_SHIFT:
		case ARIZONA_OUT2R_ENA_SHIFT:
		case ARIZONA_OUT3L_ENA_SHIFT:
		case ARIZONA_OUT3R_ENA_SHIFT:
			priv->out_up_pending++;
			priv->out_up_delay += 17;
			break;
		default:
			break;
		}
		break;
	case SND_SOC_DAPM_POST_PMU:
		switch (w->shift) {
		case ARIZONA_OUT1L_ENA_SHIFT:
		case ARIZONA_OUT1R_ENA_SHIFT:
		case ARIZONA_OUT2L_ENA_SHIFT:
		case ARIZONA_OUT2R_ENA_SHIFT:
		case ARIZONA_OUT3L_ENA_SHIFT:
		case ARIZONA_OUT3R_ENA_SHIFT:
			priv->out_up_pending--;
			if (!priv->out_up_pending) {
				msleep(priv->out_up_delay);
				priv->out_up_delay = 0;
			}
			break;

		default:
			break;
		}
		break;
	case SND_SOC_DAPM_PRE_PMD:
		switch (w->shift) {
		case ARIZONA_OUT1L_ENA_SHIFT:
		case ARIZONA_OUT1R_ENA_SHIFT:
		case ARIZONA_OUT2L_ENA_SHIFT:
		case ARIZONA_OUT2R_ENA_SHIFT:
		case ARIZONA_OUT3L_ENA_SHIFT:
		case ARIZONA_OUT3R_ENA_SHIFT:
			priv->out_down_pending++;
			priv->out_down_delay++;
			break;
		default:
			break;
		}
		break;
	case SND_SOC_DAPM_POST_PMD:
		switch (w->shift) {
		case ARIZONA_OUT1L_ENA_SHIFT:
		case ARIZONA_OUT1R_ENA_SHIFT:
		case ARIZONA_OUT2L_ENA_SHIFT:
		case ARIZONA_OUT2R_ENA_SHIFT:
		case ARIZONA_OUT3L_ENA_SHIFT:
		case ARIZONA_OUT3R_ENA_SHIFT:
			priv->out_down_pending--;
			if (!priv->out_down_pending) {
				msleep(priv->out_down_delay);
				priv->out_down_delay = 0;
			}
			break;
		default:
			break;
		}
		break;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_out_ev);

int arizona_hp_ev(struct snd_soc_dapm_widget *w,
		   struct snd_kcontrol *kcontrol,
		   int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	unsigned int mask = 1 << w->shift;
	unsigned int val;

	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		val = mask;
		break;
	case SND_SOC_DAPM_PRE_PMD:
		val = 0;
		break;
	case SND_SOC_DAPM_PRE_PMU:
	case SND_SOC_DAPM_POST_PMD:
		return arizona_out_ev(w, kcontrol, event);
	default:
		return -EINVAL;
	}

	/* Store the desired state for the HP outputs */
	priv->arizona->hp_ena &= ~mask;
	priv->arizona->hp_ena |= val;

	/* Force off if HPDET magic is active */
	if (priv->arizona->hpdet_magic)
		val = 0;

	regmap_update_bits_async(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1,
				 mask, val);

	return arizona_out_ev(w, kcontrol, event);
}
EXPORT_SYMBOL_GPL(arizona_hp_ev);

static unsigned int arizona_sysclk_48k_rates[] = {
	6144000,
	12288000,
	24576000,
	49152000,
	73728000,
	98304000,
	147456000,
};

static unsigned int arizona_sysclk_44k1_rates[] = {
	5644800,
	11289600,
	22579200,
	45158400,
	67737600,
	90316800,
	135475200,
};

static int arizona_set_opclk(struct snd_soc_codec *codec, unsigned int clk,
			     unsigned int freq)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	unsigned int reg;
	unsigned int *rates;
	int ref, div, refclk;

	switch (clk) {
	case ARIZONA_CLK_OPCLK:
		reg = ARIZONA_OUTPUT_SYSTEM_CLOCK;
		refclk = priv->sysclk;
		break;
	case ARIZONA_CLK_ASYNC_OPCLK:
		reg = ARIZONA_OUTPUT_ASYNC_CLOCK;
		refclk = priv->asyncclk;
		break;
	default:
		return -EINVAL;
	}

	if (refclk % 8000)
		rates = arizona_sysclk_44k1_rates;
	else
		rates = arizona_sysclk_48k_rates;

	for (ref = 0; ref < ARRAY_SIZE(arizona_sysclk_48k_rates) &&
		     rates[ref] <= refclk; ref++) {
		div = 1;
		while (rates[ref] / div >= freq && div < 32) {
			if (rates[ref] / div == freq) {
				dev_dbg(codec->dev, "Configured %dHz OPCLK\n",
					freq);
				snd_soc_update_bits(codec, reg,
						    ARIZONA_OPCLK_DIV_MASK |
						    ARIZONA_OPCLK_SEL_MASK,
						    (div <<
						     ARIZONA_OPCLK_DIV_SHIFT) |
						    ref);
				return 0;
			}
			div++;
		}
	}

	dev_err(codec->dev, "Unable to generate %dHz OPCLK\n", freq);
	return -EINVAL;
}

int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id,
		       int source, unsigned int freq, int dir)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	char *name;
	unsigned int reg;
	unsigned int mask = ARIZONA_SYSCLK_FREQ_MASK | ARIZONA_SYSCLK_SRC_MASK;
	unsigned int val = source << ARIZONA_SYSCLK_SRC_SHIFT;
	unsigned int *clk;

	switch (clk_id) {
	case ARIZONA_CLK_SYSCLK:
		name = "SYSCLK";
		reg = ARIZONA_SYSTEM_CLOCK_1;
		clk = &priv->sysclk;
		mask |= ARIZONA_SYSCLK_FRAC;
		break;
	case ARIZONA_CLK_ASYNCCLK:
		name = "ASYNCCLK";
		reg = ARIZONA_ASYNC_CLOCK_1;
		clk = &priv->asyncclk;
		break;
	case ARIZONA_CLK_OPCLK:
	case ARIZONA_CLK_ASYNC_OPCLK:
		return arizona_set_opclk(codec, clk_id, freq);
	default:
		return -EINVAL;
	}

	switch (freq) {
	case  5644800:
	case  6144000:
		break;
	case 11289600:
	case 12288000:
		val |= ARIZONA_CLK_12MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 22579200:
	case 24576000:
		val |= ARIZONA_CLK_24MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 45158400:
	case 49152000:
		val |= ARIZONA_CLK_49MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 67737600:
	case 73728000:
		val |= ARIZONA_CLK_73MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 90316800:
	case 98304000:
		val |= ARIZONA_CLK_98MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 135475200:
	case 147456000:
		val |= ARIZONA_CLK_147MHZ << ARIZONA_SYSCLK_FREQ_SHIFT;
		break;
	case 0:
		dev_dbg(arizona->dev, "%s cleared\n", name);
		*clk = freq;
		return 0;
	default:
		return -EINVAL;
	}

	*clk = freq;

	if (freq % 6144000)
		val |= ARIZONA_SYSCLK_FRAC;

	dev_dbg(arizona->dev, "%s set to %uHz", name, freq);

	return regmap_update_bits(arizona->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(arizona_set_sysclk);

static int arizona_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int lrclk, bclk, mode, base;

	base = dai->driver->base;

	lrclk = 0;
	bclk = 0;

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_A:
		mode = ARIZONA_FMT_DSP_MODE_A;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		if ((fmt & SND_SOC_DAIFMT_MASTER_MASK)
				!= SND_SOC_DAIFMT_CBM_CFM) {
			arizona_aif_err(dai, "DSP_B not valid in slave mode\n");
			return -EINVAL;
		}
		mode = ARIZONA_FMT_DSP_MODE_B;
		break;
	case SND_SOC_DAIFMT_I2S:
		mode = ARIZONA_FMT_I2S_MODE;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		if ((fmt & SND_SOC_DAIFMT_MASTER_MASK)
				!= SND_SOC_DAIFMT_CBM_CFM) {
			arizona_aif_err(dai, "LEFT_J not valid in slave mode\n");
			return -EINVAL;
		}
		mode = ARIZONA_FMT_LEFT_JUSTIFIED_MODE;
		break;
	default:
		arizona_aif_err(dai, "Unsupported DAI format %d\n",
				fmt & SND_SOC_DAIFMT_FORMAT_MASK);
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	case SND_SOC_DAIFMT_CBS_CFM:
		lrclk |= ARIZONA_AIF1TX_LRCLK_MSTR;
		break;
	case SND_SOC_DAIFMT_CBM_CFS:
		bclk |= ARIZONA_AIF1_BCLK_MSTR;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		bclk |= ARIZONA_AIF1_BCLK_MSTR;
		lrclk |= ARIZONA_AIF1TX_LRCLK_MSTR;
		break;
	default:
		arizona_aif_err(dai, "Unsupported master mode %d\n",
				fmt & SND_SOC_DAIFMT_MASTER_MASK);
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		bclk |= ARIZONA_AIF1_BCLK_INV;
		lrclk |= ARIZONA_AIF1TX_LRCLK_INV;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		bclk |= ARIZONA_AIF1_BCLK_INV;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		lrclk |= ARIZONA_AIF1TX_LRCLK_INV;
		break;
	default:
		return -EINVAL;
	}

	regmap_update_bits_async(arizona->regmap, base + ARIZONA_AIF_BCLK_CTRL,
				 ARIZONA_AIF1_BCLK_INV |
				 ARIZONA_AIF1_BCLK_MSTR,
				 bclk);
	regmap_update_bits_async(arizona->regmap, base + ARIZONA_AIF_TX_PIN_CTRL,
				 ARIZONA_AIF1TX_LRCLK_INV |
				 ARIZONA_AIF1TX_LRCLK_MSTR, lrclk);
	regmap_update_bits_async(arizona->regmap,
				 base + ARIZONA_AIF_RX_PIN_CTRL,
				 ARIZONA_AIF1RX_LRCLK_INV |
				 ARIZONA_AIF1RX_LRCLK_MSTR, lrclk);
	regmap_update_bits(arizona->regmap, base + ARIZONA_AIF_FORMAT,
			   ARIZONA_AIF1_FMT_MASK, mode);

	return 0;
}

static const int arizona_48k_bclk_rates[] = {
	-1,
	48000,
	64000,
	96000,
	128000,
	192000,
	256000,
	384000,
	512000,
	768000,
	1024000,
	1536000,
	2048000,
	3072000,
	4096000,
	6144000,
	8192000,
	12288000,
	24576000,
};

static const unsigned int arizona_48k_rates[] = {
	12000,
	24000,
	48000,
	96000,
	192000,
	384000,
	768000,
	4000,
	8000,
	16000,
	32000,
	64000,
	128000,
	256000,
	512000,
};

static const struct snd_pcm_hw_constraint_list arizona_48k_constraint = {
	.count	= ARRAY_SIZE(arizona_48k_rates),
	.list	= arizona_48k_rates,
};

static const int arizona_44k1_bclk_rates[] = {
	-1,
	44100,
	58800,
	88200,
	117600,
	177640,
	235200,
	352800,
	470400,
	705600,
	940800,
	1411200,
	1881600,
	2822400,
	3763200,
	5644800,
	7526400,
	11289600,
	22579200,
};

static const unsigned int arizona_44k1_rates[] = {
	11025,
	22050,
	44100,
	88200,
	176400,
	352800,
	705600,
};

static const struct snd_pcm_hw_constraint_list arizona_44k1_constraint = {
	.count	= ARRAY_SIZE(arizona_44k1_rates),
	.list	= arizona_44k1_rates,
};

static int arizona_sr_vals[] = {
	0,
	12000,
	24000,
	48000,
	96000,
	192000,
	384000,
	768000,
	0,
	11025,
	22050,
	44100,
	88200,
	176400,
	352800,
	705600,
	4000,
	8000,
	16000,
	32000,
	64000,
	128000,
	256000,
	512000,
};

static int arizona_startup(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
	const struct snd_pcm_hw_constraint_list *constraint;
	unsigned int base_rate;

	switch (dai_priv->clk) {
	case ARIZONA_CLK_SYSCLK:
		base_rate = priv->sysclk;
		break;
	case ARIZONA_CLK_ASYNCCLK:
		base_rate = priv->asyncclk;
		break;
	default:
		return 0;
	}

	if (base_rate == 0)
		return 0;

	if (base_rate % 8000)
		constraint = &arizona_44k1_constraint;
	else
		constraint = &arizona_48k_constraint;

	return snd_pcm_hw_constraint_list(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_RATE,
					  constraint);
}

static void arizona_wm5102_set_dac_comp(struct snd_soc_codec *codec,
					unsigned int rate)
{
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	struct reg_default dac_comp[] = {
		{ 0x80, 0x3 },
		{ ARIZONA_DAC_COMP_1, 0 },
		{ ARIZONA_DAC_COMP_2, 0 },
		{ 0x80, 0x0 },
	};

	mutex_lock(&arizona->dac_comp_lock);

	dac_comp[1].def = arizona->dac_comp_coeff;
	if (rate >= 176400)
		dac_comp[2].def = arizona->dac_comp_enabled;

	mutex_unlock(&arizona->dac_comp_lock);

	regmap_multi_reg_write(arizona->regmap,
			       dac_comp,
			       ARRAY_SIZE(dac_comp));
}

static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params,
				  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
	int base = dai->driver->base;
	int i, sr_val;

	/*
	 * We will need to be more flexible than this in future,
	 * currently we use a single sample rate for SYSCLK.
	 */
	for (i = 0; i < ARRAY_SIZE(arizona_sr_vals); i++)
		if (arizona_sr_vals[i] == params_rate(params))
			break;
	if (i == ARRAY_SIZE(arizona_sr_vals)) {
		arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
				params_rate(params));
		return -EINVAL;
	}
	sr_val = i;

	switch (dai_priv->clk) {
	case ARIZONA_CLK_SYSCLK:
		switch (priv->arizona->type) {
		case WM5102:
			arizona_wm5102_set_dac_comp(codec,
						    params_rate(params));
			break;
		default:
			break;
		}

		snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,
				    ARIZONA_SAMPLE_RATE_1_MASK, sr_val);
		if (base)
			snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
					    ARIZONA_AIF1_RATE_MASK, 0);
		break;
	case ARIZONA_CLK_ASYNCCLK:
		snd_soc_update_bits(codec, ARIZONA_ASYNC_SAMPLE_RATE_1,
				    ARIZONA_ASYNC_SAMPLE_RATE_1_MASK, sr_val);
		if (base)
			snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
					    ARIZONA_AIF1_RATE_MASK,
					    8 << ARIZONA_AIF1_RATE_SHIFT);
		break;
	default:
		arizona_aif_err(dai, "Invalid clock %d\n", dai_priv->clk);
		return -EINVAL;
	}

	return 0;
}

static bool arizona_aif_cfg_changed(struct snd_soc_codec *codec,
				    int base, int bclk, int lrclk, int frame)
{
	int val;

	val = snd_soc_read(codec, base + ARIZONA_AIF_BCLK_CTRL);
	if (bclk != (val & ARIZONA_AIF1_BCLK_FREQ_MASK))
		return true;

	val = snd_soc_read(codec, base + ARIZONA_AIF_TX_BCLK_RATE);
	if (lrclk != (val & ARIZONA_AIF1TX_BCPF_MASK))
		return true;

	val = snd_soc_read(codec, base + ARIZONA_AIF_FRAME_CTRL_1);
	if (frame != (val & (ARIZONA_AIF1TX_WL_MASK |
			     ARIZONA_AIF1TX_SLOT_LEN_MASK)))
		return true;

	return false;
}

static int arizona_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 arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int base = dai->driver->base;
	const int *rates;
	int i, ret, val;
	int channels = params_channels(params);
	int chan_limit = arizona->pdata.max_channels_clocked[dai->id - 1];
	int tdm_width = arizona->tdm_width[dai->id - 1];
	int tdm_slots = arizona->tdm_slots[dai->id - 1];
	int bclk, lrclk, wl, frame, bclk_target;
	bool reconfig;
	unsigned int aif_tx_state, aif_rx_state;

	if (params_rate(params) % 8000)
		rates = &arizona_44k1_bclk_rates[0];
	else
		rates = &arizona_48k_bclk_rates[0];

	wl = snd_pcm_format_width(params_format(params));

	if (tdm_slots) {
		arizona_aif_dbg(dai, "Configuring for %d %d bit TDM slots\n",
				tdm_slots, tdm_width);
		bclk_target = tdm_slots * tdm_width * params_rate(params);
		channels = tdm_slots;
	} else {
		bclk_target = snd_soc_params_to_bclk(params);
		tdm_width = wl;
	}

	if (chan_limit && chan_limit < channels) {
		arizona_aif_dbg(dai, "Limiting to %d channels\n", chan_limit);
		bclk_target /= channels;
		bclk_target *= chan_limit;
	}

	/* Force multiple of 2 channels for I2S mode */
	val = snd_soc_read(codec, base + ARIZONA_AIF_FORMAT);
	val &= ARIZONA_AIF1_FMT_MASK;
	if ((channels & 1) && (val == ARIZONA_FMT_I2S_MODE)) {
		arizona_aif_dbg(dai, "Forcing stereo mode\n");
		bclk_target /= channels;
		bclk_target *= channels + 1;
	}

	for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {
		if (rates[i] >= bclk_target &&
		    rates[i] % params_rate(params) == 0) {
			bclk = i;
			break;
		}
	}
	if (i == ARRAY_SIZE(arizona_44k1_bclk_rates)) {
		arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
				params_rate(params));
		return -EINVAL;
	}

	lrclk = rates[bclk] / params_rate(params);

	arizona_aif_dbg(dai, "BCLK %dHz LRCLK %dHz\n",
			rates[bclk], rates[bclk] / lrclk);

	frame = wl << ARIZONA_AIF1TX_WL_SHIFT | tdm_width;

	reconfig = arizona_aif_cfg_changed(codec, base, bclk, lrclk, frame);

	if (reconfig) {
		/* Save AIF TX/RX state */
		aif_tx_state = snd_soc_read(codec,
					    base + ARIZONA_AIF_TX_ENABLES);
		aif_rx_state = snd_soc_read(codec,
					    base + ARIZONA_AIF_RX_ENABLES);
		/* Disable AIF TX/RX before reconfiguring it */
		regmap_update_bits_async(arizona->regmap,
				    base + ARIZONA_AIF_TX_ENABLES, 0xff, 0x0);
		regmap_update_bits(arizona->regmap,
				    base + ARIZONA_AIF_RX_ENABLES, 0xff, 0x0);
	}

	ret = arizona_hw_params_rate(substream, params, dai);
	if (ret != 0)
		goto restore_aif;

	if (reconfig) {
		regmap_update_bits_async(arizona->regmap,
					 base + ARIZONA_AIF_BCLK_CTRL,
					 ARIZONA_AIF1_BCLK_FREQ_MASK, bclk);
		regmap_update_bits_async(arizona->regmap,
					 base + ARIZONA_AIF_TX_BCLK_RATE,
					 ARIZONA_AIF1TX_BCPF_MASK, lrclk);
		regmap_update_bits_async(arizona->regmap,
					 base + ARIZONA_AIF_RX_BCLK_RATE,
					 ARIZONA_AIF1RX_BCPF_MASK, lrclk);
		regmap_update_bits_async(arizona->regmap,
					 base + ARIZONA_AIF_FRAME_CTRL_1,
					 ARIZONA_AIF1TX_WL_MASK |
					 ARIZONA_AIF1TX_SLOT_LEN_MASK, frame);
		regmap_update_bits(arizona->regmap,
				   base + ARIZONA_AIF_FRAME_CTRL_2,
				   ARIZONA_AIF1RX_WL_MASK |
				   ARIZONA_AIF1RX_SLOT_LEN_MASK, frame);
	}

restore_aif:
	if (reconfig) {
		/* Restore AIF TX/RX state */
		regmap_update_bits_async(arizona->regmap,
					 base + ARIZONA_AIF_TX_ENABLES,
					 0xff, aif_tx_state);
		regmap_update_bits(arizona->regmap,
				   base + ARIZONA_AIF_RX_ENABLES,
				   0xff, aif_rx_state);
	}
	return ret;
}

static const char *arizona_dai_clk_str(int clk_id)
{
	switch (clk_id) {
	case ARIZONA_CLK_SYSCLK:
		return "SYSCLK";
	case ARIZONA_CLK_ASYNCCLK:
		return "ASYNCCLK";
	default:
		return "Unknown clock";
	}
}

static int arizona_dai_set_sysclk(struct snd_soc_dai *dai,
				  int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
	struct snd_soc_dapm_route routes[2];

	switch (clk_id) {
	case ARIZONA_CLK_SYSCLK:
	case ARIZONA_CLK_ASYNCCLK:
		break;
	default:
		return -EINVAL;
	}

	if (clk_id == dai_priv->clk)
		return 0;

	if (dai->active) {
		dev_err(codec->dev, "Can't change clock on active DAI %d\n",
			dai->id);
		return -EBUSY;
	}

	dev_dbg(codec->dev, "Setting AIF%d to %s\n", dai->id + 1,
		arizona_dai_clk_str(clk_id));

	memset(&routes, 0, sizeof(routes));
	routes[0].sink = dai->driver->capture.stream_name;
	routes[1].sink = dai->driver->playback.stream_name;

	routes[0].source = arizona_dai_clk_str(dai_priv->clk);
	routes[1].source = arizona_dai_clk_str(dai_priv->clk);
	snd_soc_dapm_del_routes(&codec->dapm, routes, ARRAY_SIZE(routes));

	routes[0].source = arizona_dai_clk_str(clk_id);
	routes[1].source = arizona_dai_clk_str(clk_id);
	snd_soc_dapm_add_routes(&codec->dapm, routes, ARRAY_SIZE(routes));

	dai_priv->clk = clk_id;

	return snd_soc_dapm_sync(&codec->dapm);
}

static int arizona_set_tristate(struct snd_soc_dai *dai, int tristate)
{
	struct snd_soc_codec *codec = dai->codec;
	int base = dai->driver->base;
	unsigned int reg;

	if (tristate)
		reg = ARIZONA_AIF1_TRI;
	else
		reg = 0;

	return snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
				   ARIZONA_AIF1_TRI, reg);
}

static void arizona_set_channels_to_mask(struct snd_soc_dai *dai,
					 unsigned int base,
					 int channels, unsigned int mask)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int slot, i;

	for (i = 0; i < channels; ++i) {
		slot = ffs(mask) - 1;
		if (slot < 0)
			return;

		regmap_write(arizona->regmap, base + i, slot);

		mask &= ~(1 << slot);
	}

	if (mask)
		arizona_aif_warn(dai, "Too many channels in TDM mask\n");
}

static int arizona_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
				unsigned int rx_mask, int slots, int slot_width)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona *arizona = priv->arizona;
	int base = dai->driver->base;
	int rx_max_chan = dai->driver->playback.channels_max;
	int tx_max_chan = dai->driver->capture.channels_max;

	/* Only support TDM for the physical AIFs */
	if (dai->id > ARIZONA_MAX_AIF)
		return -ENOTSUPP;

	if (slots == 0) {
		tx_mask = (1 << tx_max_chan) - 1;
		rx_mask = (1 << rx_max_chan) - 1;
	}

	arizona_set_channels_to_mask(dai, base + ARIZONA_AIF_FRAME_CTRL_3,
				     tx_max_chan, tx_mask);
	arizona_set_channels_to_mask(dai, base + ARIZONA_AIF_FRAME_CTRL_11,
				     rx_max_chan, rx_mask);

	arizona->tdm_width[dai->id - 1] = slot_width;
	arizona->tdm_slots[dai->id - 1] = slots;

	return 0;
}

const struct snd_soc_dai_ops arizona_dai_ops = {
	.startup = arizona_startup,
	.set_fmt = arizona_set_fmt,
	.set_tdm_slot = arizona_set_tdm_slot,
	.hw_params = arizona_hw_params,
	.set_sysclk = arizona_dai_set_sysclk,
	.set_tristate = arizona_set_tristate,
};
EXPORT_SYMBOL_GPL(arizona_dai_ops);

const struct snd_soc_dai_ops arizona_simple_dai_ops = {
	.startup = arizona_startup,
	.hw_params = arizona_hw_params_rate,
	.set_sysclk = arizona_dai_set_sysclk,
};
EXPORT_SYMBOL_GPL(arizona_simple_dai_ops);

int arizona_init_dai(struct arizona_priv *priv, int id)
{
	struct arizona_dai_priv *dai_priv = &priv->dai[id];

	dai_priv->clk = ARIZONA_CLK_SYSCLK;

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_init_dai);

static irqreturn_t arizona_fll_clock_ok(int irq, void *data)
{
	struct arizona_fll *fll = data;

	arizona_fll_dbg(fll, "clock OK\n");

	complete(&fll->ok);

	return IRQ_HANDLED;
}

static struct {
	unsigned int min;
	unsigned int max;
	u16 fratio;
	int ratio;
} fll_fratios[] = {
	{       0,    64000, 4, 16 },
	{   64000,   128000, 3,  8 },
	{  128000,   256000, 2,  4 },
	{  256000,  1000000, 1,  2 },
	{ 1000000, 13500000, 0,  1 },
};

static struct {
	unsigned int min;
	unsigned int max;
	u16 gain;
} fll_gains[] = {
	{       0,   256000, 0 },
	{  256000,  1000000, 2 },
	{ 1000000, 13500000, 4 },
};

struct arizona_fll_cfg {
	int n;
	int theta;
	int lambda;
	int refdiv;
	int outdiv;
	int fratio;
	int gain;
};

static int arizona_validate_fll(struct arizona_fll *fll,
				unsigned int Fref,
				unsigned int Fout)
{
	unsigned int Fvco_min;

	if (fll->fout && Fout != fll->fout) {
		arizona_fll_err(fll,
				"Can't change output on active FLL\n");
		return -EINVAL;
	}

	if (Fref / ARIZONA_FLL_MAX_REFDIV > ARIZONA_FLL_MAX_FREF) {
		arizona_fll_err(fll,
				"Can't scale %dMHz in to <=13.5MHz\n",
				Fref);
		return -EINVAL;
	}

	Fvco_min = ARIZONA_FLL_MIN_FVCO * fll->vco_mult;
	if (Fout * ARIZONA_FLL_MAX_OUTDIV < Fvco_min) {
		arizona_fll_err(fll, "No FLL_OUTDIV for Fout=%uHz\n",
				Fout);
		return -EINVAL;
	}

	return 0;
}

static int arizona_find_fratio(unsigned int Fref, int *fratio)
{
	int i;

	/* Find an appropriate FLL_FRATIO */
	for (i = 0; i < ARRAY_SIZE(fll_fratios); i++) {
		if (fll_fratios[i].min <= Fref && Fref <= fll_fratios[i].max) {
			if (fratio)
				*fratio = fll_fratios[i].fratio;
			return fll_fratios[i].ratio;
		}
	}

	return -EINVAL;
}

static int arizona_calc_fratio(struct arizona_fll *fll,
			       struct arizona_fll_cfg *cfg,
			       unsigned int target,
			       unsigned int Fref, bool sync)
{
	int init_ratio, ratio;
	int refdiv, div;

	/* Fref must be <=13.5MHz, find initial refdiv */
	div = 1;
	cfg->refdiv = 0;
	while (Fref > ARIZONA_FLL_MAX_FREF) {
		div *= 2;
		Fref /= 2;
		cfg->refdiv++;

		if (div > ARIZONA_FLL_MAX_REFDIV)
			return -EINVAL;
	}

	/* Find an appropriate FLL_FRATIO */
	init_ratio = arizona_find_fratio(Fref, &cfg->fratio);
	if (init_ratio < 0) {
		arizona_fll_err(fll, "Unable to find FRATIO for Fref=%uHz\n",
				Fref);
		return init_ratio;
	}

	switch (fll->arizona->type) {
	case WM5110:
		if (fll->arizona->rev < 3 || sync)
			return init_ratio;
		break;
	default:
		return init_ratio;
	}

	cfg->fratio = init_ratio - 1;

	/* Adjust FRATIO/refdiv to avoid integer mode if possible */
	refdiv = cfg->refdiv;

	while (div <= ARIZONA_FLL_MAX_REFDIV) {
		for (ratio = init_ratio; ratio <= ARIZONA_FLL_MAX_FRATIO;
		     ratio++) {
			if ((ARIZONA_FLL_VCO_CORNER / 2) /
			    (fll->vco_mult * ratio) < Fref)
				break;

			if (target % (ratio * Fref)) {
				cfg->refdiv = refdiv;
				cfg->fratio = ratio - 1;
				return ratio;
			}
		}

		for (ratio = init_ratio - 1; ratio > 0; ratio--) {
			if (target % (ratio * Fref)) {
				cfg->refdiv = refdiv;
				cfg->fratio = ratio - 1;
				return ratio;
			}
		}

		div *= 2;
		Fref /= 2;
		refdiv++;
		init_ratio = arizona_find_fratio(Fref, NULL);
	}

	arizona_fll_warn(fll, "Falling back to integer mode operation\n");
	return cfg->fratio + 1;
}

static int arizona_calc_fll(struct arizona_fll *fll,
			    struct arizona_fll_cfg *cfg,
			    unsigned int Fref, bool sync)
{
	unsigned int target, div, gcd_fll;
	int i, ratio;

	arizona_fll_dbg(fll, "Fref=%u Fout=%u\n", Fref, fll->fout);

	/* Fvco should be over the targt; don't check the upper bound */
	div = ARIZONA_FLL_MIN_OUTDIV;
	while (fll->fout * div < ARIZONA_FLL_MIN_FVCO * fll->vco_mult) {
		div++;
		if (div > ARIZONA_FLL_MAX_OUTDIV)
			return -EINVAL;
	}
	target = fll->fout * div / fll->vco_mult;
	cfg->outdiv = div;

	arizona_fll_dbg(fll, "Fvco=%dHz\n", target);

	/* Find an appropriate FLL_FRATIO and refdiv */
	ratio = arizona_calc_fratio(fll, cfg, target, Fref, sync);
	if (ratio < 0)
		return ratio;

	/* Apply the division for our remaining calculations */
	Fref = Fref / (1 << cfg->refdiv);

	cfg->n = target / (ratio * Fref);

	if (target % (ratio * Fref)) {
		gcd_fll = gcd(target, ratio * Fref);
		arizona_fll_dbg(fll, "GCD=%u\n", gcd_fll);

		cfg->theta = (target - (cfg->n * ratio * Fref))
			/ gcd_fll;
		cfg->lambda = (ratio * Fref) / gcd_fll;
	} else {
		cfg->theta = 0;
		cfg->lambda = 0;
	}

	/* Round down to 16bit range with cost of accuracy lost.
	 * Denominator must be bigger than numerator so we only
	 * take care of it.
	 */
	while (cfg->lambda >= (1 << 16)) {
		cfg->theta >>= 1;
		cfg->lambda >>= 1;
	}

	for (i = 0; i < ARRAY_SIZE(fll_gains); i++) {
		if (fll_gains[i].min <= Fref && Fref <= fll_gains[i].max) {
			cfg->gain = fll_gains[i].gain;
			break;
		}
	}
	if (i == ARRAY_SIZE(fll_gains)) {
		arizona_fll_err(fll, "Unable to find gain for Fref=%uHz\n",
				Fref);
		return -EINVAL;
	}

	arizona_fll_dbg(fll, "N=%x THETA=%x LAMBDA=%x\n",
			cfg->n, cfg->theta, cfg->lambda);
	arizona_fll_dbg(fll, "FRATIO=%x(%d) OUTDIV=%x REFCLK_DIV=%x\n",
			cfg->fratio, cfg->fratio, cfg->outdiv, cfg->refdiv);
	arizona_fll_dbg(fll, "GAIN=%d\n", cfg->gain);

	return 0;

}

static void arizona_apply_fll(struct arizona *arizona, unsigned int base,
			      struct arizona_fll_cfg *cfg, int source,
			      bool sync)
{
	regmap_update_bits_async(arizona->regmap, base + 3,
				 ARIZONA_FLL1_THETA_MASK, cfg->theta);
	regmap_update_bits_async(arizona->regmap, base + 4,
				 ARIZONA_FLL1_LAMBDA_MASK, cfg->lambda);
	regmap_update_bits_async(arizona->regmap, base + 5,
				 ARIZONA_FLL1_FRATIO_MASK,
				 cfg->fratio << ARIZONA_FLL1_FRATIO_SHIFT);
	regmap_update_bits_async(arizona->regmap, base + 6,
				 ARIZONA_FLL1_CLK_REF_DIV_MASK |
				 ARIZONA_FLL1_CLK_REF_SRC_MASK,
				 cfg->refdiv << ARIZONA_FLL1_CLK_REF_DIV_SHIFT |
				 source << ARIZONA_FLL1_CLK_REF_SRC_SHIFT);

	if (sync) {
		regmap_update_bits(arizona->regmap, base + 0x7,
				   ARIZONA_FLL1_GAIN_MASK,
				   cfg->gain << ARIZONA_FLL1_GAIN_SHIFT);
	} else {
		regmap_update_bits(arizona->regmap, base + 0x5,
				   ARIZONA_FLL1_OUTDIV_MASK,
				   cfg->outdiv << ARIZONA_FLL1_OUTDIV_SHIFT);
		regmap_update_bits(arizona->regmap, base + 0x9,
				   ARIZONA_FLL1_GAIN_MASK,
				   cfg->gain << ARIZONA_FLL1_GAIN_SHIFT);
	}

	regmap_update_bits_async(arizona->regmap, base + 2,
				 ARIZONA_FLL1_CTRL_UPD | ARIZONA_FLL1_N_MASK,
				 ARIZONA_FLL1_CTRL_UPD | cfg->n);
}

static int arizona_is_enabled_fll(struct arizona_fll *fll)
{
	struct arizona *arizona = fll->arizona;
	unsigned int reg;
	int ret;

	ret = regmap_read(arizona->regmap, fll->base + 1, &reg);
	if (ret != 0) {
		arizona_fll_err(fll, "Failed to read current state: %d\n",
				ret);
		return ret;
	}

	return reg & ARIZONA_FLL1_ENA;
}

static int arizona_enable_fll(struct arizona_fll *fll)
{
	struct arizona *arizona = fll->arizona;
	unsigned long time_left;
	bool use_sync = false;
	int already_enabled = arizona_is_enabled_fll(fll);
	struct arizona_fll_cfg cfg;

	if (already_enabled < 0)
		return already_enabled;

	if (already_enabled) {
		/* Facilitate smooth refclk across the transition */
		regmap_update_bits_async(fll->arizona->regmap, fll->base + 0x7,
					 ARIZONA_FLL1_GAIN_MASK, 0);
		regmap_update_bits_async(fll->arizona->regmap, fll->base + 1,
					 ARIZONA_FLL1_FREERUN,
					 ARIZONA_FLL1_FREERUN);
	}

	/*
	 * If we have both REFCLK and SYNCCLK then enable both,
	 * otherwise apply the SYNCCLK settings to REFCLK.
	 */
	if (fll->ref_src >= 0 && fll->ref_freq &&
	    fll->ref_src != fll->sync_src) {
		arizona_calc_fll(fll, &cfg, fll->ref_freq, false);

		arizona_apply_fll(arizona, fll->base, &cfg, fll->ref_src,
				  false);
		if (fll->sync_src >= 0) {
			arizona_calc_fll(fll, &cfg, fll->sync_freq, true);

			arizona_apply_fll(arizona, fll->base + 0x10, &cfg,
					  fll->sync_src, true);
			use_sync = true;
		}
	} else if (fll->sync_src >= 0) {
		arizona_calc_fll(fll, &cfg, fll->sync_freq, false);

		arizona_apply_fll(arizona, fll->base, &cfg,
				  fll->sync_src, false);

		regmap_update_bits_async(arizona->regmap, fll->base + 0x11,
					 ARIZONA_FLL1_SYNC_ENA, 0);
	} else {
		arizona_fll_err(fll, "No clocks provided\n");
		return -EINVAL;
	}

	/*
	 * Increase the bandwidth if we're not using a low frequency
	 * sync source.
	 */
	if (use_sync && fll->sync_freq > 100000)
		regmap_update_bits_async(arizona->regmap, fll->base + 0x17,
					 ARIZONA_FLL1_SYNC_BW, 0);
	else
		regmap_update_bits_async(arizona->regmap, fll->base + 0x17,
					 ARIZONA_FLL1_SYNC_BW,
					 ARIZONA_FLL1_SYNC_BW);

	if (!already_enabled)
		pm_runtime_get(arizona->dev);

	/* Clear any pending completions */
	try_wait_for_completion(&fll->ok);

	regmap_update_bits_async(arizona->regmap, fll->base + 1,
				 ARIZONA_FLL1_ENA, ARIZONA_FLL1_ENA);
	if (use_sync)
		regmap_update_bits_async(arizona->regmap, fll->base + 0x11,
					 ARIZONA_FLL1_SYNC_ENA,
					 ARIZONA_FLL1_SYNC_ENA);

	if (already_enabled)
		regmap_update_bits_async(arizona->regmap, fll->base + 1,
					 ARIZONA_FLL1_FREERUN, 0);

	time_left = wait_for_completion_timeout(&fll->ok,
					  msecs_to_jiffies(250));
	if (time_left == 0)
		arizona_fll_warn(fll, "Timed out waiting for lock\n");

	return 0;
}

static void arizona_disable_fll(struct arizona_fll *fll)
{
	struct arizona *arizona = fll->arizona;
	bool change;

	regmap_update_bits_async(arizona->regmap, fll->base + 1,
				 ARIZONA_FLL1_FREERUN, ARIZONA_FLL1_FREERUN);
	regmap_update_bits_check(arizona->regmap, fll->base + 1,
				 ARIZONA_FLL1_ENA, 0, &change);
	regmap_update_bits(arizona->regmap, fll->base + 0x11,
			   ARIZONA_FLL1_SYNC_ENA, 0);
	regmap_update_bits_async(arizona->regmap, fll->base + 1,
				 ARIZONA_FLL1_FREERUN, 0);

	if (change)
		pm_runtime_put_autosuspend(arizona->dev);
}

int arizona_set_fll_refclk(struct arizona_fll *fll, int source,
			   unsigned int Fref, unsigned int Fout)
{
	int ret = 0;

	if (fll->ref_src == source && fll->ref_freq == Fref)
		return 0;

	if (fll->fout && Fref > 0) {
		ret = arizona_validate_fll(fll, Fref, fll->fout);
		if (ret != 0)
			return ret;
	}

	fll->ref_src = source;
	fll->ref_freq = Fref;

	if (fll->fout && Fref > 0) {
		ret = arizona_enable_fll(fll);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(arizona_set_fll_refclk);

int arizona_set_fll(struct arizona_fll *fll, int source,
		    unsigned int Fref, unsigned int Fout)
{
	int ret = 0;

	if (fll->sync_src == source &&
	    fll->sync_freq == Fref && fll->fout == Fout)
		return 0;

	if (Fout) {
		if (fll->ref_src >= 0) {
			ret = arizona_validate_fll(fll, fll->ref_freq, Fout);
			if (ret != 0)
				return ret;
		}

		ret = arizona_validate_fll(fll, Fref, Fout);
		if (ret != 0)
			return ret;
	}

	fll->sync_src = source;
	fll->sync_freq = Fref;
	fll->fout = Fout;

	if (Fout)
		ret = arizona_enable_fll(fll);
	else
		arizona_disable_fll(fll);

	return ret;
}
EXPORT_SYMBOL_GPL(arizona_set_fll);

int arizona_init_fll(struct arizona *arizona, int id, int base, int lock_irq,
		     int ok_irq, struct arizona_fll *fll)
{
	int ret;
	unsigned int val;

	init_completion(&fll->ok);

	fll->id = id;
	fll->base = base;
	fll->arizona = arizona;
	fll->sync_src = ARIZONA_FLL_SRC_NONE;

	/* Configure default refclk to 32kHz if we have one */
	regmap_read(arizona->regmap, ARIZONA_CLOCK_32K_1, &val);
	switch (val & ARIZONA_CLK_32K_SRC_MASK) {
	case ARIZONA_CLK_SRC_MCLK1:
	case ARIZONA_CLK_SRC_MCLK2:
		fll->ref_src = val & ARIZONA_CLK_32K_SRC_MASK;
		break;
	default:
		fll->ref_src = ARIZONA_FLL_SRC_NONE;
	}
	fll->ref_freq = 32768;

	snprintf(fll->lock_name, sizeof(fll->lock_name), "FLL%d lock", id);
	snprintf(fll->clock_ok_name, sizeof(fll->clock_ok_name),
		 "FLL%d clock OK", id);

	ret = arizona_request_irq(arizona, ok_irq, fll->clock_ok_name,
				  arizona_fll_clock_ok, fll);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to get FLL%d clock OK IRQ: %d\n",
			id, ret);
	}

	regmap_update_bits(arizona->regmap, fll->base + 1,
			   ARIZONA_FLL1_FREERUN, 0);

	return 0;
}
EXPORT_SYMBOL_GPL(arizona_init_fll);

/**
 * arizona_set_output_mode - Set the mode of the specified output
 *
 * @codec: Device to configure
 * @output: Output number
 * @diff: True to set the output to differential mode
 *
 * Some systems use external analogue switches to connect more
 * analogue devices to the CODEC than are supported by the device.  In
 * some systems this requires changing the switched output from single
 * ended to differential mode dynamically at runtime, an operation
 * supported using this function.
 *
 * Most systems have a single static configuration and should use
 * platform data instead.
 */
int arizona_set_output_mode(struct snd_soc_codec *codec, int output, bool diff)
{
	unsigned int reg, val;

	if (output < 1 || output > 6)
		return -EINVAL;

	reg = ARIZONA_OUTPUT_PATH_CONFIG_1L + (output - 1) * 8;

	if (diff)
		val = ARIZONA_OUT1_MONO;
	else
		val = 0;

	return snd_soc_update_bits(codec, reg, ARIZONA_OUT1_MONO, val);
}
EXPORT_SYMBOL_GPL(arizona_set_output_mode);

MODULE_DESCRIPTION("ASoC Wolfson Arizona class device support");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");