sound/soc/codecs/wm9090.c - linux - Git at Google

 /*
  * ALSA SoC WM9090 driver
  *
  * Copyright 2009-12 Wolfson Microelectronics
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  */

 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/device.h>
 #include <linux/i2c.h>
 #include <linux/delay.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <sound/initval.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
 #include <sound/wm9090.h>

 #include "wm9090.h"

 static const struct reg_default wm9090_reg_defaults[] = {
 	{ 1,  0x0006 },     /* R1   - Power Management (1) */
 	{ 2,  0x6000 },     /* R2   - Power Management (2) */
 	{ 3,  0x0000 },     /* R3   - Power Management (3) */
 	{ 6,  0x01C0 },     /* R6   - Clocking 1 */
 	{ 22, 0x0003 },     /* R22  - IN1 Line Control */
 	{ 23, 0x0003 },     /* R23  - IN2 Line Control */
 	{ 24, 0x0083 },     /* R24  - IN1 Line Input A Volume */
 	{ 25, 0x0083 },     /* R25  - IN1  Line Input B Volume */
 	{ 26, 0x0083 },     /* R26  - IN2 Line Input A Volume */
 	{ 27, 0x0083 },     /* R27  - IN2 Line Input B Volume */
 	{ 28, 0x002D },     /* R28  - Left Output Volume */
 	{ 29, 0x002D },     /* R29  - Right Output Volume */
 	{ 34, 0x0100 },     /* R34  - SPKMIXL Attenuation */
 	{ 35, 0x0010 },     /* R36  - SPKOUT Mixers */
 	{ 37, 0x0140 },     /* R37  - ClassD3 */
 	{ 38, 0x0039 },     /* R38  - Speaker Volume Left */
 	{ 45, 0x0000 },     /* R45  - Output Mixer1 */
 	{ 46, 0x0000 },     /* R46  - Output Mixer2 */
 	{ 47, 0x0100 },     /* R47  - Output Mixer3 */
 	{ 48, 0x0100 },     /* R48  - Output Mixer4 */
 	{ 54, 0x0000 },     /* R54  - Speaker Mixer */
 	{ 57, 0x000D },     /* R57  - AntiPOP2 */
 	{ 70, 0x0000 },     /* R70  - Write Sequencer 0 */
 	{ 71, 0x0000 },     /* R71  - Write Sequencer 1 */
 	{ 72, 0x0000 },     /* R72  - Write Sequencer 2 */
 	{ 73, 0x0000 },     /* R73  - Write Sequencer 3 */
 	{ 74, 0x0000 },     /* R74  - Write Sequencer 4 */
 	{ 75, 0x0000 },     /* R75  - Write Sequencer 5 */
 	{ 76, 0x1F25 },     /* R76  - Charge Pump 1 */
 	{ 85, 0x054A },     /* R85  - DC Servo 1 */
 	{ 87, 0x0000 },     /* R87  - DC Servo 3 */
 	{ 96, 0x0100 },     /* R96  - Analogue HP 0 */
 	{ 98, 0x8640 },     /* R98  - AGC Control 0 */
 	{ 99, 0xC000 },     /* R99  - AGC Control 1 */
 	{ 100, 0x0200 },     /* R100 - AGC Control 2 */
 };

 /* This struct is used to save the context */
 struct wm9090_priv {
 	struct wm9090_platform_data pdata;
 	struct regmap *regmap;
 };

 static bool wm9090_volatile(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case WM9090_SOFTWARE_RESET:
 	case WM9090_DC_SERVO_0:
 	case WM9090_DC_SERVO_READBACK_0:
 	case WM9090_DC_SERVO_READBACK_1:
 	case WM9090_DC_SERVO_READBACK_2:
 		return true;

 	default:
 		return false;
 	}
 }

 static bool wm9090_readable(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case WM9090_SOFTWARE_RESET:
 	case WM9090_POWER_MANAGEMENT_1:
 	case WM9090_POWER_MANAGEMENT_2:
 	case WM9090_POWER_MANAGEMENT_3:
 	case WM9090_CLOCKING_1:
 	case WM9090_IN1_LINE_CONTROL:
 	case WM9090_IN2_LINE_CONTROL:
 	case WM9090_IN1_LINE_INPUT_A_VOLUME:
 	case WM9090_IN1_LINE_INPUT_B_VOLUME:
 	case WM9090_IN2_LINE_INPUT_A_VOLUME:
 	case WM9090_IN2_LINE_INPUT_B_VOLUME:
 	case WM9090_LEFT_OUTPUT_VOLUME:
 	case WM9090_RIGHT_OUTPUT_VOLUME:
 	case WM9090_SPKMIXL_ATTENUATION:
 	case WM9090_SPKOUT_MIXERS:
 	case WM9090_CLASSD3:
 	case WM9090_SPEAKER_VOLUME_LEFT:
 	case WM9090_OUTPUT_MIXER1:
 	case WM9090_OUTPUT_MIXER2:
 	case WM9090_OUTPUT_MIXER3:
 	case WM9090_OUTPUT_MIXER4:
 	case WM9090_SPEAKER_MIXER:
 	case WM9090_ANTIPOP2:
 	case WM9090_WRITE_SEQUENCER_0:
 	case WM9090_WRITE_SEQUENCER_1:
 	case WM9090_WRITE_SEQUENCER_2:
 	case WM9090_WRITE_SEQUENCER_3:
 	case WM9090_WRITE_SEQUENCER_4:
 	case WM9090_WRITE_SEQUENCER_5:
 	case WM9090_CHARGE_PUMP_1:
 	case WM9090_DC_SERVO_0:
 	case WM9090_DC_SERVO_1:
 	case WM9090_DC_SERVO_3:
 	case WM9090_DC_SERVO_READBACK_0:
 	case WM9090_DC_SERVO_READBACK_1:
 	case WM9090_DC_SERVO_READBACK_2:
 	case WM9090_ANALOGUE_HP_0:
 	case WM9090_AGC_CONTROL_0:
 	case WM9090_AGC_CONTROL_1:
 	case WM9090_AGC_CONTROL_2:
 		return true;

 	default:
 		return false;
 	}
 }

 static void wait_for_dc_servo(struct snd_soc_codec *codec)
 {
 	unsigned int reg;
 	int count = 0;

 	dev_dbg(codec->dev, "Waiting for DC servo...\n");
 	do {
 		count++;
 		msleep(1);
 		reg = snd_soc_read(codec, WM9090_DC_SERVO_READBACK_0);
 		dev_dbg(codec->dev, "DC servo status: %x\n", reg);
 	} while ((reg & WM9090_DCS_CAL_COMPLETE_MASK)
 		 != WM9090_DCS_CAL_COMPLETE_MASK && count < 1000);

 	if ((reg & WM9090_DCS_CAL_COMPLETE_MASK)
 	    != WM9090_DCS_CAL_COMPLETE_MASK)
 		dev_err(codec->dev, "Timed out waiting for DC Servo\n");
 }

 static const unsigned int in_tlv[] = {
 	TLV_DB_RANGE_HEAD(3),
 	0, 0, TLV_DB_SCALE_ITEM(-600, 0, 0),
 	1, 3, TLV_DB_SCALE_ITEM(-350, 350, 0),
 	4, 6, TLV_DB_SCALE_ITEM(600, 600, 0),
 };
 static const unsigned int mix_tlv[] = {
 	TLV_DB_RANGE_HEAD(2),
 	0, 2, TLV_DB_SCALE_ITEM(-1200, 300, 0),
 	3, 3, TLV_DB_SCALE_ITEM(0, 0, 0),
 };
 static const DECLARE_TLV_DB_SCALE(out_tlv, -5700, 100, 0);
 static const unsigned int spkboost_tlv[] = {
 	TLV_DB_RANGE_HEAD(2),
 	0, 6, TLV_DB_SCALE_ITEM(0, 150, 0),
 	7, 7, TLV_DB_SCALE_ITEM(1200, 0, 0),
 };

 static const struct snd_kcontrol_new wm9090_controls[] = {
 SOC_SINGLE_TLV("IN1A Volume", WM9090_IN1_LINE_INPUT_A_VOLUME, 0, 6, 0,
 	       in_tlv),
 SOC_SINGLE("IN1A Switch", WM9090_IN1_LINE_INPUT_A_VOLUME, 7, 1, 1),
 SOC_SINGLE("IN1A ZC Switch", WM9090_IN1_LINE_INPUT_A_VOLUME, 6, 1, 0),

 SOC_SINGLE_TLV("IN2A Volume", WM9090_IN2_LINE_INPUT_A_VOLUME, 0, 6, 0,
 	       in_tlv),
 SOC_SINGLE("IN2A Switch", WM9090_IN2_LINE_INPUT_A_VOLUME, 7, 1, 1),
 SOC_SINGLE("IN2A ZC Switch", WM9090_IN2_LINE_INPUT_A_VOLUME, 6, 1, 0),

 SOC_SINGLE("MIXOUTL Switch", WM9090_OUTPUT_MIXER3, 8, 1, 1),
 SOC_SINGLE_TLV("MIXOUTL IN1A Volume", WM9090_OUTPUT_MIXER3, 6, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTL IN2A Volume", WM9090_OUTPUT_MIXER3, 2, 3, 1,
 	       mix_tlv),

 SOC_SINGLE("MIXOUTR Switch", WM9090_OUTPUT_MIXER4, 8, 1, 1),
 SOC_SINGLE_TLV("MIXOUTR IN1A Volume", WM9090_OUTPUT_MIXER4, 6, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTR IN2A Volume", WM9090_OUTPUT_MIXER4, 2, 3, 1,
 	       mix_tlv),

 SOC_SINGLE("SPKMIX Switch", WM9090_SPKMIXL_ATTENUATION, 8, 1, 1),
 SOC_SINGLE_TLV("SPKMIX IN1A Volume", WM9090_SPKMIXL_ATTENUATION, 6, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("SPKMIX IN2A Volume", WM9090_SPKMIXL_ATTENUATION, 2, 3, 1,
 	       mix_tlv),

 SOC_DOUBLE_R_TLV("Headphone Volume", WM9090_LEFT_OUTPUT_VOLUME,
 		 WM9090_RIGHT_OUTPUT_VOLUME, 0, 63, 0, out_tlv),
 SOC_DOUBLE_R("Headphone Switch", WM9090_LEFT_OUTPUT_VOLUME,
 	     WM9090_RIGHT_OUTPUT_VOLUME, 6, 1, 1),
 SOC_DOUBLE_R("Headphone ZC Switch", WM9090_LEFT_OUTPUT_VOLUME,
 	     WM9090_RIGHT_OUTPUT_VOLUME, 7, 1, 0),

 SOC_SINGLE_TLV("Speaker Volume", WM9090_SPEAKER_VOLUME_LEFT, 0, 63, 0,
 	       out_tlv),
 SOC_SINGLE("Speaker Switch", WM9090_SPEAKER_VOLUME_LEFT, 6, 1, 1),
 SOC_SINGLE("Speaker ZC Switch", WM9090_SPEAKER_VOLUME_LEFT, 7, 1, 0),
 SOC_SINGLE_TLV("Speaker Boost Volume", WM9090_CLASSD3, 3, 7, 0, spkboost_tlv),
 };

 static const struct snd_kcontrol_new wm9090_in1_se_controls[] = {
 SOC_SINGLE_TLV("IN1B Volume", WM9090_IN1_LINE_INPUT_B_VOLUME, 0, 6, 0,
 	       in_tlv),
 SOC_SINGLE("IN1B Switch", WM9090_IN1_LINE_INPUT_B_VOLUME, 7, 1, 1),
 SOC_SINGLE("IN1B ZC Switch", WM9090_IN1_LINE_INPUT_B_VOLUME, 6, 1, 0),

 SOC_SINGLE_TLV("SPKMIX IN1B Volume", WM9090_SPKMIXL_ATTENUATION, 4, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTL IN1B Volume", WM9090_OUTPUT_MIXER3, 4, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTR IN1B Volume", WM9090_OUTPUT_MIXER4, 4, 3, 1,
 	       mix_tlv),
 };

 static const struct snd_kcontrol_new wm9090_in2_se_controls[] = {
 SOC_SINGLE_TLV("IN2B Volume", WM9090_IN2_LINE_INPUT_B_VOLUME, 0, 6, 0,
 	       in_tlv),
 SOC_SINGLE("IN2B Switch", WM9090_IN2_LINE_INPUT_B_VOLUME, 7, 1, 1),
 SOC_SINGLE("IN2B ZC Switch", WM9090_IN2_LINE_INPUT_B_VOLUME, 6, 1, 0),

 SOC_SINGLE_TLV("SPKMIX IN2B Volume", WM9090_SPKMIXL_ATTENUATION, 0, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTL IN2B Volume", WM9090_OUTPUT_MIXER3, 0, 3, 1,
 	       mix_tlv),
 SOC_SINGLE_TLV("MIXOUTR IN2B Volume", WM9090_OUTPUT_MIXER4, 0, 3, 1,
 	       mix_tlv),
 };

 static int hp_ev(struct snd_soc_dapm_widget *w,
 		 struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_codec *codec = w->codec;
 	unsigned int reg = snd_soc_read(codec, WM9090_ANALOGUE_HP_0);

 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
 		snd_soc_update_bits(codec, WM9090_CHARGE_PUMP_1,
 				    WM9090_CP_ENA, WM9090_CP_ENA);

 		msleep(5);

 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
 				    WM9090_HPOUT1L_ENA | WM9090_HPOUT1R_ENA,
 				    WM9090_HPOUT1L_ENA | WM9090_HPOUT1R_ENA);

 		reg |= WM9090_HPOUT1L_DLY | WM9090_HPOUT1R_DLY;
 		snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);

 		/* Start the DC servo.  We don't currently use the
 		 * ability to save the state since we don't have full
 		 * control of the analogue paths and they can change
 		 * DC offsets; see the WM8904 driver for an example of
 		 * doing so.
 		 */
 		snd_soc_write(codec, WM9090_DC_SERVO_0,
 			      WM9090_DCS_ENA_CHAN_0 |
 			      WM9090_DCS_ENA_CHAN_1 |
 			      WM9090_DCS_TRIG_STARTUP_1 |
 			      WM9090_DCS_TRIG_STARTUP_0);
 		wait_for_dc_servo(codec);

 		reg |= WM9090_HPOUT1R_OUTP | WM9090_HPOUT1R_RMV_SHORT |
 			WM9090_HPOUT1L_OUTP | WM9090_HPOUT1L_RMV_SHORT;
 		snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);
 		break;

 	case SND_SOC_DAPM_PRE_PMD:
 		reg &= ~(WM9090_HPOUT1L_RMV_SHORT |
 			 WM9090_HPOUT1L_DLY |
 			 WM9090_HPOUT1L_OUTP |
 			 WM9090_HPOUT1R_RMV_SHORT |
 			 WM9090_HPOUT1R_DLY |
 			 WM9090_HPOUT1R_OUTP);

 		snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);

 		snd_soc_write(codec, WM9090_DC_SERVO_0, 0);

 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
 				    WM9090_HPOUT1L_ENA | WM9090_HPOUT1R_ENA,
 				    0);

 		snd_soc_update_bits(codec, WM9090_CHARGE_PUMP_1,
 				    WM9090_CP_ENA, 0);
 		break;
 	}

 	return 0;
 }

 static const struct snd_kcontrol_new spkmix[] = {
 SOC_DAPM_SINGLE("IN1A Switch", WM9090_SPEAKER_MIXER, 6, 1, 0),
 SOC_DAPM_SINGLE("IN1B Switch", WM9090_SPEAKER_MIXER, 4, 1, 0),
 SOC_DAPM_SINGLE("IN2A Switch", WM9090_SPEAKER_MIXER, 2, 1, 0),
 SOC_DAPM_SINGLE("IN2B Switch", WM9090_SPEAKER_MIXER, 0, 1, 0),
 };

 static const struct snd_kcontrol_new spkout[] = {
 SOC_DAPM_SINGLE("Mixer Switch", WM9090_SPKOUT_MIXERS, 4, 1, 0),
 };

 static const struct snd_kcontrol_new mixoutl[] = {
 SOC_DAPM_SINGLE("IN1A Switch", WM9090_OUTPUT_MIXER1, 6, 1, 0),
 SOC_DAPM_SINGLE("IN1B Switch", WM9090_OUTPUT_MIXER1, 4, 1, 0),
 SOC_DAPM_SINGLE("IN2A Switch", WM9090_OUTPUT_MIXER1, 2, 1, 0),
 SOC_DAPM_SINGLE("IN2B Switch", WM9090_OUTPUT_MIXER1, 0, 1, 0),
 };

 static const struct snd_kcontrol_new mixoutr[] = {
 SOC_DAPM_SINGLE("IN1A Switch", WM9090_OUTPUT_MIXER2, 6, 1, 0),
 SOC_DAPM_SINGLE("IN1B Switch", WM9090_OUTPUT_MIXER2, 4, 1, 0),
 SOC_DAPM_SINGLE("IN2A Switch", WM9090_OUTPUT_MIXER2, 2, 1, 0),
 SOC_DAPM_SINGLE("IN2B Switch", WM9090_OUTPUT_MIXER2, 0, 1, 0),
 };

 static const struct snd_soc_dapm_widget wm9090_dapm_widgets[] = {
 SND_SOC_DAPM_INPUT("IN1+"),
 SND_SOC_DAPM_INPUT("IN1-"),
 SND_SOC_DAPM_INPUT("IN2+"),
 SND_SOC_DAPM_INPUT("IN2-"),

 SND_SOC_DAPM_SUPPLY("OSC", WM9090_POWER_MANAGEMENT_1, 3, 0, NULL, 0),

 SND_SOC_DAPM_PGA("IN1A PGA", WM9090_POWER_MANAGEMENT_2, 7, 0, NULL, 0),
 SND_SOC_DAPM_PGA("IN1B PGA", WM9090_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
 SND_SOC_DAPM_PGA("IN2A PGA", WM9090_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
 SND_SOC_DAPM_PGA("IN2B PGA", WM9090_POWER_MANAGEMENT_2, 4, 0, NULL, 0),

 SND_SOC_DAPM_MIXER("SPKMIX", WM9090_POWER_MANAGEMENT_3, 3, 0,
 		   spkmix, ARRAY_SIZE(spkmix)),
 SND_SOC_DAPM_MIXER("MIXOUTL", WM9090_POWER_MANAGEMENT_3, 5, 0,
 		   mixoutl, ARRAY_SIZE(mixoutl)),
 SND_SOC_DAPM_MIXER("MIXOUTR", WM9090_POWER_MANAGEMENT_3, 4, 0,
 		   mixoutr, ARRAY_SIZE(mixoutr)),

 SND_SOC_DAPM_PGA_E("HP PGA", SND_SOC_NOPM, 0, 0, NULL, 0,
 		   hp_ev, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),

 SND_SOC_DAPM_PGA("SPKPGA", WM9090_POWER_MANAGEMENT_3, 8, 0, NULL, 0),
 SND_SOC_DAPM_MIXER("SPKOUT", WM9090_POWER_MANAGEMENT_1, 12, 0,
 		   spkout, ARRAY_SIZE(spkout)),

 SND_SOC_DAPM_OUTPUT("HPR"),
 SND_SOC_DAPM_OUTPUT("HPL"),
 SND_SOC_DAPM_OUTPUT("Speaker"),
 };

 static const struct snd_soc_dapm_route audio_map[] = {
 	{ "IN1A PGA", NULL, "IN1+" },
 	{ "IN2A PGA", NULL, "IN2+" },

 	{ "SPKMIX", "IN1A Switch", "IN1A PGA" },
 	{ "SPKMIX", "IN2A Switch", "IN2A PGA" },

 	{ "MIXOUTL", "IN1A Switch", "IN1A PGA" },
 	{ "MIXOUTL", "IN2A Switch", "IN2A PGA" },

 	{ "MIXOUTR", "IN1A Switch", "IN1A PGA" },
 	{ "MIXOUTR", "IN2A Switch", "IN2A PGA" },

 	{ "HP PGA", NULL, "OSC" },
 	{ "HP PGA", NULL, "MIXOUTL" },
 	{ "HP PGA", NULL, "MIXOUTR" },

 	{ "HPL", NULL, "HP PGA" },
 	{ "HPR", NULL, "HP PGA" },

 	{ "SPKPGA", NULL, "OSC" },
 	{ "SPKPGA", NULL, "SPKMIX" },

 	{ "SPKOUT", "Mixer Switch", "SPKPGA" },

 	{ "Speaker", NULL, "SPKOUT" },
 };

 static const struct snd_soc_dapm_route audio_map_in1_se[] = {
 	{ "IN1B PGA", NULL, "IN1-" },

 	{ "SPKMIX", "IN1B Switch", "IN1B PGA" },
 	{ "MIXOUTL", "IN1B Switch", "IN1B PGA" },
 	{ "MIXOUTR", "IN1B Switch", "IN1B PGA" },
 };

 static const struct snd_soc_dapm_route audio_map_in1_diff[] = {
 	{ "IN1A PGA", NULL, "IN1-" },
 };

 static const struct snd_soc_dapm_route audio_map_in2_se[] = {
 	{ "IN2B PGA", NULL, "IN2-" },

 	{ "SPKMIX", "IN2B Switch", "IN2B PGA" },
 	{ "MIXOUTL", "IN2B Switch", "IN2B PGA" },
 	{ "MIXOUTR", "IN2B Switch", "IN2B PGA" },
 };

 static const struct snd_soc_dapm_route audio_map_in2_diff[] = {
 	{ "IN2A PGA", NULL, "IN2-" },
 };

 static int wm9090_add_controls(struct snd_soc_codec *codec)
 {
 	struct wm9090_priv *wm9090 = snd_soc_codec_get_drvdata(codec);
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	int i;

 	snd_soc_dapm_new_controls(dapm, wm9090_dapm_widgets,
 				  ARRAY_SIZE(wm9090_dapm_widgets));

 	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

 	snd_soc_add_codec_controls(codec, wm9090_controls,
 			     ARRAY_SIZE(wm9090_controls));

 	if (wm9090->pdata.lin1_diff) {
 		snd_soc_dapm_add_routes(dapm, audio_map_in1_diff,
 					ARRAY_SIZE(audio_map_in1_diff));
 	} else {
 		snd_soc_dapm_add_routes(dapm, audio_map_in1_se,
 					ARRAY_SIZE(audio_map_in1_se));
 		snd_soc_add_codec_controls(codec, wm9090_in1_se_controls,
 				     ARRAY_SIZE(wm9090_in1_se_controls));
 	}

 	if (wm9090->pdata.lin2_diff) {
 		snd_soc_dapm_add_routes(dapm, audio_map_in2_diff,
 					ARRAY_SIZE(audio_map_in2_diff));
 	} else {
 		snd_soc_dapm_add_routes(dapm, audio_map_in2_se,
 					ARRAY_SIZE(audio_map_in2_se));
 		snd_soc_add_codec_controls(codec, wm9090_in2_se_controls,
 				     ARRAY_SIZE(wm9090_in2_se_controls));
 	}

 	if (wm9090->pdata.agc_ena) {
 		for (i = 0; i < ARRAY_SIZE(wm9090->pdata.agc); i++)
 			snd_soc_write(codec, WM9090_AGC_CONTROL_0 + i,
 				      wm9090->pdata.agc[i]);
 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_3,
 				    WM9090_AGC_ENA, WM9090_AGC_ENA);
 	} else {
 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_3,
 				    WM9090_AGC_ENA, 0);
 	}

 	return 0;

 }

 /*
  * The machine driver should call this from their set_bias_level; if there
  * isn't one then this can just be set as the set_bias_level function.
  */
 static int wm9090_set_bias_level(struct snd_soc_codec *codec,
 				 enum snd_soc_bias_level level)
 {
 	struct wm9090_priv *wm9090 = snd_soc_codec_get_drvdata(codec);

 	switch (level) {
 	case SND_SOC_BIAS_ON:
 		break;

 	case SND_SOC_BIAS_PREPARE:
 		snd_soc_update_bits(codec, WM9090_ANTIPOP2, WM9090_VMID_ENA,
 				    WM9090_VMID_ENA);
 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
 				    WM9090_BIAS_ENA |
 				    WM9090_VMID_RES_MASK,
 				    WM9090_BIAS_ENA |
 				    1 << WM9090_VMID_RES_SHIFT);
 		msleep(1);  /* Probably an overestimate */
 		break;

 	case SND_SOC_BIAS_STANDBY:
 		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 			/* Restore the register cache */
 			regcache_sync(wm9090->regmap);
 		}

 		/* We keep VMID off during standby since the combination of
 		 * ground referenced outputs and class D speaker mean that
 		 * latency is not an issue.
 		 */
 		snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
 				    WM9090_BIAS_ENA | WM9090_VMID_RES_MASK, 0);
 		snd_soc_update_bits(codec, WM9090_ANTIPOP2,
 				    WM9090_VMID_ENA, 0);
 		break;

 	case SND_SOC_BIAS_OFF:
 		break;
 	}

 	codec->dapm.bias_level = level;

 	return 0;
 }

 static int wm9090_probe(struct snd_soc_codec *codec)
 {
 	struct wm9090_priv *wm9090 = dev_get_drvdata(codec->dev);
 	int ret;

 	codec->control_data = wm9090->regmap;
 	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_REGMAP);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 		return ret;
 	}

 	/* Configure some defaults; they will be written out when we
 	 * bring the bias up.
 	 */
 	snd_soc_update_bits(codec, WM9090_IN1_LINE_INPUT_A_VOLUME,
 			    WM9090_IN1_VU | WM9090_IN1A_ZC,
 			    WM9090_IN1_VU | WM9090_IN1A_ZC);
 	snd_soc_update_bits(codec, WM9090_IN1_LINE_INPUT_B_VOLUME,
 			    WM9090_IN1_VU | WM9090_IN1B_ZC,
 			    WM9090_IN1_VU | WM9090_IN1B_ZC);
 	snd_soc_update_bits(codec, WM9090_IN2_LINE_INPUT_A_VOLUME,
 			    WM9090_IN2_VU | WM9090_IN2A_ZC,
 			    WM9090_IN2_VU | WM9090_IN2A_ZC);
 	snd_soc_update_bits(codec, WM9090_IN2_LINE_INPUT_B_VOLUME,
 			    WM9090_IN2_VU | WM9090_IN2B_ZC,
 			    WM9090_IN2_VU | WM9090_IN2B_ZC);
 	snd_soc_update_bits(codec, WM9090_SPEAKER_VOLUME_LEFT,
 			    WM9090_SPKOUT_VU | WM9090_SPKOUTL_ZC,
 			    WM9090_SPKOUT_VU | WM9090_SPKOUTL_ZC);
 	snd_soc_update_bits(codec, WM9090_LEFT_OUTPUT_VOLUME,
 			    WM9090_HPOUT1_VU | WM9090_HPOUT1L_ZC,
 			    WM9090_HPOUT1_VU | WM9090_HPOUT1L_ZC);
 	snd_soc_update_bits(codec, WM9090_RIGHT_OUTPUT_VOLUME,
 			    WM9090_HPOUT1_VU | WM9090_HPOUT1R_ZC,
 			    WM9090_HPOUT1_VU | WM9090_HPOUT1R_ZC);

 	snd_soc_update_bits(codec, WM9090_CLOCKING_1,
 			    WM9090_TOCLK_ENA, WM9090_TOCLK_ENA);

 	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

 	wm9090_add_controls(codec);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int wm9090_suspend(struct snd_soc_codec *codec)
 {
 	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);

 	return 0;
 }

 static int wm9090_resume(struct snd_soc_codec *codec)
 {
 	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

 	return 0;
 }
 #else
 #define wm9090_suspend NULL
 #define wm9090_resume NULL
 #endif

 static int wm9090_remove(struct snd_soc_codec *codec)
 {
 	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);

 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_dev_wm9090 = {
 	.probe = 	wm9090_probe,
 	.remove = 	wm9090_remove,
 	.suspend = 	wm9090_suspend,
 	.resume =	wm9090_resume,
 	.set_bias_level = wm9090_set_bias_level,
 };

 static const struct regmap_config wm9090_regmap = {
 	.reg_bits = 8,
 	.val_bits = 16,

 	.max_register = WM9090_MAX_REGISTER,
 	.volatile_reg = wm9090_volatile,
 	.readable_reg = wm9090_readable,

 	.cache_type = REGCACHE_RBTREE,
 	.reg_defaults = wm9090_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(wm9090_reg_defaults),
 };


 static int wm9090_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct wm9090_priv *wm9090;
 	unsigned int reg;
 	int ret;

 	wm9090 = devm_kzalloc(&i2c->dev, sizeof(*wm9090), GFP_KERNEL);
 	if (wm9090 == NULL) {
 		dev_err(&i2c->dev, "Can not allocate memory\n");
 		return -ENOMEM;
 	}

 	wm9090->regmap = devm_regmap_init_i2c(i2c, &wm9090_regmap);
 	if (IS_ERR(wm9090->regmap)) {
 		ret = PTR_ERR(wm9090->regmap);
 		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
 		return ret;
 	}

 	ret = regmap_read(wm9090->regmap, WM9090_SOFTWARE_RESET, &reg);
 	if (ret < 0)
 		return ret;

 	if (reg != 0x9093) {
 		dev_err(&i2c->dev, "Device is not a WM9090, ID=%x\n", reg);
 		return -ENODEV;
 	}

 	ret = regmap_write(wm9090->regmap, WM9090_SOFTWARE_RESET, 0);
 	if (ret < 0)
 		return ret;

 	if (i2c->dev.platform_data)
 		memcpy(&wm9090->pdata, i2c->dev.platform_data,
 		       sizeof(wm9090->pdata));

 	i2c_set_clientdata(i2c, wm9090);

 	ret =  snd_soc_register_codec(&i2c->dev,
 			&soc_codec_dev_wm9090,  NULL, 0);
 	if (ret != 0) {
 		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 static int wm9090_i2c_remove(struct i2c_client *i2c)
 {
 	snd_soc_unregister_codec(&i2c->dev);
 	return 0;
 }

 static const struct i2c_device_id wm9090_id[] = {
 	{ "wm9090", 0 },
 	{ "wm9093", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, wm9090_id);

 static struct i2c_driver wm9090_i2c_driver = {
 	.driver = {
 		.name = "wm9090",
 		.owner = THIS_MODULE,
 	},
 	.probe = wm9090_i2c_probe,
 	.remove = wm9090_i2c_remove,
 	.id_table = wm9090_id,
 };

 module_i2c_driver(wm9090_i2c_driver);

 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("WM9090 ASoC driver");
 MODULE_LICENSE("GPL");
	/*
	* ALSA SoC WM9090 driver
	*
	* Copyright 2009-12 Wolfson Microelectronics
	*
	* 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.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*/

	#include <linux/module.h>
	#include <linux/errno.h>
	#include <linux/device.h>
	#include <linux/i2c.h>
	#include <linux/delay.h>
	#include <linux/regmap.h>
	#include <linux/slab.h>
	#include <sound/initval.h>
	#include <sound/soc.h>
	#include <sound/tlv.h>
	#include <sound/wm9090.h>

	#include "wm9090.h"

	static const struct reg_default wm9090_reg_defaults[] = {
	{ 1, 0x0006 }, /* R1 - Power Management (1) */
	{ 2, 0x6000 }, /* R2 - Power Management (2) */
	{ 3, 0x0000 }, /* R3 - Power Management (3) */
	{ 6, 0x01C0 }, /* R6 - Clocking 1 */
	{ 22, 0x0003 }, /* R22 - IN1 Line Control */
	{ 23, 0x0003 }, /* R23 - IN2 Line Control */
	{ 24, 0x0083 }, /* R24 - IN1 Line Input A Volume */
	{ 25, 0x0083 }, /* R25 - IN1 Line Input B Volume */
	{ 26, 0x0083 }, /* R26 - IN2 Line Input A Volume */
	{ 27, 0x0083 }, /* R27 - IN2 Line Input B Volume */
	{ 28, 0x002D }, /* R28 - Left Output Volume */
	{ 29, 0x002D }, /* R29 - Right Output Volume */
	{ 34, 0x0100 }, /* R34 - SPKMIXL Attenuation */
	{ 35, 0x0010 }, /* R36 - SPKOUT Mixers */
	{ 37, 0x0140 }, /* R37 - ClassD3 */
	{ 38, 0x0039 }, /* R38 - Speaker Volume Left */
	{ 45, 0x0000 }, /* R45 - Output Mixer1 */
	{ 46, 0x0000 }, /* R46 - Output Mixer2 */
	{ 47, 0x0100 }, /* R47 - Output Mixer3 */
	{ 48, 0x0100 }, /* R48 - Output Mixer4 */
	{ 54, 0x0000 }, /* R54 - Speaker Mixer */
	{ 57, 0x000D }, /* R57 - AntiPOP2 */
	{ 70, 0x0000 }, /* R70 - Write Sequencer 0 */
	{ 71, 0x0000 }, /* R71 - Write Sequencer 1 */
	{ 72, 0x0000 }, /* R72 - Write Sequencer 2 */
	{ 73, 0x0000 }, /* R73 - Write Sequencer 3 */
	{ 74, 0x0000 }, /* R74 - Write Sequencer 4 */
	{ 75, 0x0000 }, /* R75 - Write Sequencer 5 */
	{ 76, 0x1F25 }, /* R76 - Charge Pump 1 */
	{ 85, 0x054A }, /* R85 - DC Servo 1 */
	{ 87, 0x0000 }, /* R87 - DC Servo 3 */
	{ 96, 0x0100 }, /* R96 - Analogue HP 0 */
	{ 98, 0x8640 }, /* R98 - AGC Control 0 */
	{ 99, 0xC000 }, /* R99 - AGC Control 1 */
	{ 100, 0x0200 }, /* R100 - AGC Control 2 */
	};

	/* This struct is used to save the context */
	struct wm9090_priv {
	struct wm9090_platform_data pdata;
	struct regmap *regmap;
	};

	static bool wm9090_volatile(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case WM9090_SOFTWARE_RESET:
	case WM9090_DC_SERVO_0:
	case WM9090_DC_SERVO_READBACK_0:
	case WM9090_DC_SERVO_READBACK_1:
	case WM9090_DC_SERVO_READBACK_2:
	return true;

	default:
	return false;
	}
	}

	static bool wm9090_readable(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case WM9090_SOFTWARE_RESET:
	case WM9090_POWER_MANAGEMENT_1:
	case WM9090_POWER_MANAGEMENT_2:
	case WM9090_POWER_MANAGEMENT_3:
	case WM9090_CLOCKING_1:
	case WM9090_IN1_LINE_CONTROL:
	case WM9090_IN2_LINE_CONTROL:
	case WM9090_IN1_LINE_INPUT_A_VOLUME:
	case WM9090_IN1_LINE_INPUT_B_VOLUME:
	case WM9090_IN2_LINE_INPUT_A_VOLUME:
	case WM9090_IN2_LINE_INPUT_B_VOLUME:
	case WM9090_LEFT_OUTPUT_VOLUME:
	case WM9090_RIGHT_OUTPUT_VOLUME:
	case WM9090_SPKMIXL_ATTENUATION:
	case WM9090_SPKOUT_MIXERS:
	case WM9090_CLASSD3:
	case WM9090_SPEAKER_VOLUME_LEFT:
	case WM9090_OUTPUT_MIXER1:
	case WM9090_OUTPUT_MIXER2:
	case WM9090_OUTPUT_MIXER3:
	case WM9090_OUTPUT_MIXER4:
	case WM9090_SPEAKER_MIXER:
	case WM9090_ANTIPOP2:
	case WM9090_WRITE_SEQUENCER_0:
	case WM9090_WRITE_SEQUENCER_1:
	case WM9090_WRITE_SEQUENCER_2:
	case WM9090_WRITE_SEQUENCER_3:
	case WM9090_WRITE_SEQUENCER_4:
	case WM9090_WRITE_SEQUENCER_5:
	case WM9090_CHARGE_PUMP_1:
	case WM9090_DC_SERVO_0:
	case WM9090_DC_SERVO_1:
	case WM9090_DC_SERVO_3:
	case WM9090_DC_SERVO_READBACK_0:
	case WM9090_DC_SERVO_READBACK_1:
	case WM9090_DC_SERVO_READBACK_2:
	case WM9090_ANALOGUE_HP_0:
	case WM9090_AGC_CONTROL_0:
	case WM9090_AGC_CONTROL_1:
	case WM9090_AGC_CONTROL_2:
	return true;

	default:
	return false;
	}
	}

	static void wait_for_dc_servo(struct snd_soc_codec *codec)
	{
	unsigned int reg;
	int count = 0;

	dev_dbg(codec->dev, "Waiting for DC servo...\n");
	do {
	count++;
	msleep(1);
	reg = snd_soc_read(codec, WM9090_DC_SERVO_READBACK_0);
	dev_dbg(codec->dev, "DC servo status: %x\n", reg);
	} while ((reg & WM9090_DCS_CAL_COMPLETE_MASK)
	!= WM9090_DCS_CAL_COMPLETE_MASK && count < 1000);

	if ((reg & WM9090_DCS_CAL_COMPLETE_MASK)
	!= WM9090_DCS_CAL_COMPLETE_MASK)
	dev_err(codec->dev, "Timed out waiting for DC Servo\n");
	}

	static const unsigned int in_tlv[] = {
	TLV_DB_RANGE_HEAD(3),
	0, 0, TLV_DB_SCALE_ITEM(-600, 0, 0),
	1, 3, TLV_DB_SCALE_ITEM(-350, 350, 0),
	4, 6, TLV_DB_SCALE_ITEM(600, 600, 0),
	};
	static const unsigned int mix_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0, 2, TLV_DB_SCALE_ITEM(-1200, 300, 0),
	3, 3, TLV_DB_SCALE_ITEM(0, 0, 0),
	};
	static const DECLARE_TLV_DB_SCALE(out_tlv, -5700, 100, 0);
	static const unsigned int spkboost_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0, 6, TLV_DB_SCALE_ITEM(0, 150, 0),
	7, 7, TLV_DB_SCALE_ITEM(1200, 0, 0),
	};

	static const struct snd_kcontrol_new wm9090_controls[] = {
	SOC_SINGLE_TLV("IN1A Volume", WM9090_IN1_LINE_INPUT_A_VOLUME, 0, 6, 0,
	in_tlv),
	SOC_SINGLE("IN1A Switch", WM9090_IN1_LINE_INPUT_A_VOLUME, 7, 1, 1),
	SOC_SINGLE("IN1A ZC Switch", WM9090_IN1_LINE_INPUT_A_VOLUME, 6, 1, 0),

	SOC_SINGLE_TLV("IN2A Volume", WM9090_IN2_LINE_INPUT_A_VOLUME, 0, 6, 0,
	in_tlv),
	SOC_SINGLE("IN2A Switch", WM9090_IN2_LINE_INPUT_A_VOLUME, 7, 1, 1),
	SOC_SINGLE("IN2A ZC Switch", WM9090_IN2_LINE_INPUT_A_VOLUME, 6, 1, 0),

	SOC_SINGLE("MIXOUTL Switch", WM9090_OUTPUT_MIXER3, 8, 1, 1),
	SOC_SINGLE_TLV("MIXOUTL IN1A Volume", WM9090_OUTPUT_MIXER3, 6, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTL IN2A Volume", WM9090_OUTPUT_MIXER3, 2, 3, 1,
	mix_tlv),

	SOC_SINGLE("MIXOUTR Switch", WM9090_OUTPUT_MIXER4, 8, 1, 1),
	SOC_SINGLE_TLV("MIXOUTR IN1A Volume", WM9090_OUTPUT_MIXER4, 6, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTR IN2A Volume", WM9090_OUTPUT_MIXER4, 2, 3, 1,
	mix_tlv),

	SOC_SINGLE("SPKMIX Switch", WM9090_SPKMIXL_ATTENUATION, 8, 1, 1),
	SOC_SINGLE_TLV("SPKMIX IN1A Volume", WM9090_SPKMIXL_ATTENUATION, 6, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("SPKMIX IN2A Volume", WM9090_SPKMIXL_ATTENUATION, 2, 3, 1,
	mix_tlv),

	SOC_DOUBLE_R_TLV("Headphone Volume", WM9090_LEFT_OUTPUT_VOLUME,
	WM9090_RIGHT_OUTPUT_VOLUME, 0, 63, 0, out_tlv),
	SOC_DOUBLE_R("Headphone Switch", WM9090_LEFT_OUTPUT_VOLUME,
	WM9090_RIGHT_OUTPUT_VOLUME, 6, 1, 1),
	SOC_DOUBLE_R("Headphone ZC Switch", WM9090_LEFT_OUTPUT_VOLUME,
	WM9090_RIGHT_OUTPUT_VOLUME, 7, 1, 0),

	SOC_SINGLE_TLV("Speaker Volume", WM9090_SPEAKER_VOLUME_LEFT, 0, 63, 0,
	out_tlv),
	SOC_SINGLE("Speaker Switch", WM9090_SPEAKER_VOLUME_LEFT, 6, 1, 1),
	SOC_SINGLE("Speaker ZC Switch", WM9090_SPEAKER_VOLUME_LEFT, 7, 1, 0),
	SOC_SINGLE_TLV("Speaker Boost Volume", WM9090_CLASSD3, 3, 7, 0, spkboost_tlv),
	};

	static const struct snd_kcontrol_new wm9090_in1_se_controls[] = {
	SOC_SINGLE_TLV("IN1B Volume", WM9090_IN1_LINE_INPUT_B_VOLUME, 0, 6, 0,
	in_tlv),
	SOC_SINGLE("IN1B Switch", WM9090_IN1_LINE_INPUT_B_VOLUME, 7, 1, 1),
	SOC_SINGLE("IN1B ZC Switch", WM9090_IN1_LINE_INPUT_B_VOLUME, 6, 1, 0),

	SOC_SINGLE_TLV("SPKMIX IN1B Volume", WM9090_SPKMIXL_ATTENUATION, 4, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTL IN1B Volume", WM9090_OUTPUT_MIXER3, 4, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTR IN1B Volume", WM9090_OUTPUT_MIXER4, 4, 3, 1,
	mix_tlv),
	};

	static const struct snd_kcontrol_new wm9090_in2_se_controls[] = {
	SOC_SINGLE_TLV("IN2B Volume", WM9090_IN2_LINE_INPUT_B_VOLUME, 0, 6, 0,
	in_tlv),
	SOC_SINGLE("IN2B Switch", WM9090_IN2_LINE_INPUT_B_VOLUME, 7, 1, 1),
	SOC_SINGLE("IN2B ZC Switch", WM9090_IN2_LINE_INPUT_B_VOLUME, 6, 1, 0),

	SOC_SINGLE_TLV("SPKMIX IN2B Volume", WM9090_SPKMIXL_ATTENUATION, 0, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTL IN2B Volume", WM9090_OUTPUT_MIXER3, 0, 3, 1,
	mix_tlv),
	SOC_SINGLE_TLV("MIXOUTR IN2B Volume", WM9090_OUTPUT_MIXER4, 0, 3, 1,
	mix_tlv),
	};

	static int hp_ev(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
	{
	struct snd_soc_codec *codec = w->codec;
	unsigned int reg = snd_soc_read(codec, WM9090_ANALOGUE_HP_0);

	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
	snd_soc_update_bits(codec, WM9090_CHARGE_PUMP_1,
	WM9090_CP_ENA, WM9090_CP_ENA);

	msleep(5);

	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
	WM9090_HPOUT1L_ENA \| WM9090_HPOUT1R_ENA,
	WM9090_HPOUT1L_ENA \| WM9090_HPOUT1R_ENA);

	reg \|= WM9090_HPOUT1L_DLY \| WM9090_HPOUT1R_DLY;
	snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);

	/* Start the DC servo. We don't currently use the
	* ability to save the state since we don't have full
	* control of the analogue paths and they can change
	* DC offsets; see the WM8904 driver for an example of
	* doing so.
	*/
	snd_soc_write(codec, WM9090_DC_SERVO_0,
	WM9090_DCS_ENA_CHAN_0 \|
	WM9090_DCS_ENA_CHAN_1 \|
	WM9090_DCS_TRIG_STARTUP_1 \|
	WM9090_DCS_TRIG_STARTUP_0);
	wait_for_dc_servo(codec);

	reg \|= WM9090_HPOUT1R_OUTP \| WM9090_HPOUT1R_RMV_SHORT \|
	WM9090_HPOUT1L_OUTP \| WM9090_HPOUT1L_RMV_SHORT;
	snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);
	break;

	case SND_SOC_DAPM_PRE_PMD:
	reg &= ~(WM9090_HPOUT1L_RMV_SHORT \|
	WM9090_HPOUT1L_DLY \|
	WM9090_HPOUT1L_OUTP \|
	WM9090_HPOUT1R_RMV_SHORT \|
	WM9090_HPOUT1R_DLY \|
	WM9090_HPOUT1R_OUTP);

	snd_soc_write(codec, WM9090_ANALOGUE_HP_0, reg);

	snd_soc_write(codec, WM9090_DC_SERVO_0, 0);

	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
	WM9090_HPOUT1L_ENA \| WM9090_HPOUT1R_ENA,
	0);

	snd_soc_update_bits(codec, WM9090_CHARGE_PUMP_1,
	WM9090_CP_ENA, 0);
	break;
	}

	return 0;
	}

	static const struct snd_kcontrol_new spkmix[] = {
	SOC_DAPM_SINGLE("IN1A Switch", WM9090_SPEAKER_MIXER, 6, 1, 0),
	SOC_DAPM_SINGLE("IN1B Switch", WM9090_SPEAKER_MIXER, 4, 1, 0),
	SOC_DAPM_SINGLE("IN2A Switch", WM9090_SPEAKER_MIXER, 2, 1, 0),
	SOC_DAPM_SINGLE("IN2B Switch", WM9090_SPEAKER_MIXER, 0, 1, 0),
	};

	static const struct snd_kcontrol_new spkout[] = {
	SOC_DAPM_SINGLE("Mixer Switch", WM9090_SPKOUT_MIXERS, 4, 1, 0),
	};

	static const struct snd_kcontrol_new mixoutl[] = {
	SOC_DAPM_SINGLE("IN1A Switch", WM9090_OUTPUT_MIXER1, 6, 1, 0),
	SOC_DAPM_SINGLE("IN1B Switch", WM9090_OUTPUT_MIXER1, 4, 1, 0),
	SOC_DAPM_SINGLE("IN2A Switch", WM9090_OUTPUT_MIXER1, 2, 1, 0),
	SOC_DAPM_SINGLE("IN2B Switch", WM9090_OUTPUT_MIXER1, 0, 1, 0),
	};

	static const struct snd_kcontrol_new mixoutr[] = {
	SOC_DAPM_SINGLE("IN1A Switch", WM9090_OUTPUT_MIXER2, 6, 1, 0),
	SOC_DAPM_SINGLE("IN1B Switch", WM9090_OUTPUT_MIXER2, 4, 1, 0),
	SOC_DAPM_SINGLE("IN2A Switch", WM9090_OUTPUT_MIXER2, 2, 1, 0),
	SOC_DAPM_SINGLE("IN2B Switch", WM9090_OUTPUT_MIXER2, 0, 1, 0),
	};

	static const struct snd_soc_dapm_widget wm9090_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("IN1+"),
	SND_SOC_DAPM_INPUT("IN1-"),
	SND_SOC_DAPM_INPUT("IN2+"),
	SND_SOC_DAPM_INPUT("IN2-"),

	SND_SOC_DAPM_SUPPLY("OSC", WM9090_POWER_MANAGEMENT_1, 3, 0, NULL, 0),

	SND_SOC_DAPM_PGA("IN1A PGA", WM9090_POWER_MANAGEMENT_2, 7, 0, NULL, 0),
	SND_SOC_DAPM_PGA("IN1B PGA", WM9090_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
	SND_SOC_DAPM_PGA("IN2A PGA", WM9090_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
	SND_SOC_DAPM_PGA("IN2B PGA", WM9090_POWER_MANAGEMENT_2, 4, 0, NULL, 0),

	SND_SOC_DAPM_MIXER("SPKMIX", WM9090_POWER_MANAGEMENT_3, 3, 0,
	spkmix, ARRAY_SIZE(spkmix)),
	SND_SOC_DAPM_MIXER("MIXOUTL", WM9090_POWER_MANAGEMENT_3, 5, 0,
	mixoutl, ARRAY_SIZE(mixoutl)),
	SND_SOC_DAPM_MIXER("MIXOUTR", WM9090_POWER_MANAGEMENT_3, 4, 0,
	mixoutr, ARRAY_SIZE(mixoutr)),

	SND_SOC_DAPM_PGA_E("HP PGA", SND_SOC_NOPM, 0, 0, NULL, 0,
	hp_ev, SND_SOC_DAPM_POST_PMU \| SND_SOC_DAPM_PRE_PMD),

	SND_SOC_DAPM_PGA("SPKPGA", WM9090_POWER_MANAGEMENT_3, 8, 0, NULL, 0),
	SND_SOC_DAPM_MIXER("SPKOUT", WM9090_POWER_MANAGEMENT_1, 12, 0,
	spkout, ARRAY_SIZE(spkout)),

	SND_SOC_DAPM_OUTPUT("HPR"),
	SND_SOC_DAPM_OUTPUT("HPL"),
	SND_SOC_DAPM_OUTPUT("Speaker"),
	};

	static const struct snd_soc_dapm_route audio_map[] = {
	{ "IN1A PGA", NULL, "IN1+" },
	{ "IN2A PGA", NULL, "IN2+" },

	{ "SPKMIX", "IN1A Switch", "IN1A PGA" },
	{ "SPKMIX", "IN2A Switch", "IN2A PGA" },

	{ "MIXOUTL", "IN1A Switch", "IN1A PGA" },
	{ "MIXOUTL", "IN2A Switch", "IN2A PGA" },

	{ "MIXOUTR", "IN1A Switch", "IN1A PGA" },
	{ "MIXOUTR", "IN2A Switch", "IN2A PGA" },

	{ "HP PGA", NULL, "OSC" },
	{ "HP PGA", NULL, "MIXOUTL" },
	{ "HP PGA", NULL, "MIXOUTR" },

	{ "HPL", NULL, "HP PGA" },
	{ "HPR", NULL, "HP PGA" },

	{ "SPKPGA", NULL, "OSC" },
	{ "SPKPGA", NULL, "SPKMIX" },

	{ "SPKOUT", "Mixer Switch", "SPKPGA" },

	{ "Speaker", NULL, "SPKOUT" },
	};

	static const struct snd_soc_dapm_route audio_map_in1_se[] = {
	{ "IN1B PGA", NULL, "IN1-" },

	{ "SPKMIX", "IN1B Switch", "IN1B PGA" },
	{ "MIXOUTL", "IN1B Switch", "IN1B PGA" },
	{ "MIXOUTR", "IN1B Switch", "IN1B PGA" },
	};

	static const struct snd_soc_dapm_route audio_map_in1_diff[] = {
	{ "IN1A PGA", NULL, "IN1-" },
	};

	static const struct snd_soc_dapm_route audio_map_in2_se[] = {
	{ "IN2B PGA", NULL, "IN2-" },

	{ "SPKMIX", "IN2B Switch", "IN2B PGA" },
	{ "MIXOUTL", "IN2B Switch", "IN2B PGA" },
	{ "MIXOUTR", "IN2B Switch", "IN2B PGA" },
	};

	static const struct snd_soc_dapm_route audio_map_in2_diff[] = {
	{ "IN2A PGA", NULL, "IN2-" },
	};

	static int wm9090_add_controls(struct snd_soc_codec *codec)
	{
	struct wm9090_priv *wm9090 = snd_soc_codec_get_drvdata(codec);
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int i;

	snd_soc_dapm_new_controls(dapm, wm9090_dapm_widgets,
	ARRAY_SIZE(wm9090_dapm_widgets));

	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

	snd_soc_add_codec_controls(codec, wm9090_controls,
	ARRAY_SIZE(wm9090_controls));

	if (wm9090->pdata.lin1_diff) {
	snd_soc_dapm_add_routes(dapm, audio_map_in1_diff,
	ARRAY_SIZE(audio_map_in1_diff));
	} else {
	snd_soc_dapm_add_routes(dapm, audio_map_in1_se,
	ARRAY_SIZE(audio_map_in1_se));
	snd_soc_add_codec_controls(codec, wm9090_in1_se_controls,
	ARRAY_SIZE(wm9090_in1_se_controls));
	}

	if (wm9090->pdata.lin2_diff) {
	snd_soc_dapm_add_routes(dapm, audio_map_in2_diff,
	ARRAY_SIZE(audio_map_in2_diff));
	} else {
	snd_soc_dapm_add_routes(dapm, audio_map_in2_se,
	ARRAY_SIZE(audio_map_in2_se));
	snd_soc_add_codec_controls(codec, wm9090_in2_se_controls,
	ARRAY_SIZE(wm9090_in2_se_controls));
	}

	if (wm9090->pdata.agc_ena) {
	for (i = 0; i < ARRAY_SIZE(wm9090->pdata.agc); i++)
	snd_soc_write(codec, WM9090_AGC_CONTROL_0 + i,
	wm9090->pdata.agc[i]);
	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_3,
	WM9090_AGC_ENA, WM9090_AGC_ENA);
	} else {
	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_3,
	WM9090_AGC_ENA, 0);
	}

	return 0;

	}

	/*
	* The machine driver should call this from their set_bias_level; if there
	* isn't one then this can just be set as the set_bias_level function.
	*/
	static int wm9090_set_bias_level(struct snd_soc_codec *codec,
	enum snd_soc_bias_level level)
	{
	struct wm9090_priv *wm9090 = snd_soc_codec_get_drvdata(codec);

	switch (level) {
	case SND_SOC_BIAS_ON:
	break;

	case SND_SOC_BIAS_PREPARE:
	snd_soc_update_bits(codec, WM9090_ANTIPOP2, WM9090_VMID_ENA,
	WM9090_VMID_ENA);
	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
	WM9090_BIAS_ENA \|
	WM9090_VMID_RES_MASK,
	WM9090_BIAS_ENA \|
	1 << WM9090_VMID_RES_SHIFT);
	msleep(1); /* Probably an overestimate */
	break;

	case SND_SOC_BIAS_STANDBY:
	if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
	/* Restore the register cache */
	regcache_sync(wm9090->regmap);
	}

	/* We keep VMID off during standby since the combination of
	* ground referenced outputs and class D speaker mean that
	* latency is not an issue.
	*/
	snd_soc_update_bits(codec, WM9090_POWER_MANAGEMENT_1,
	WM9090_BIAS_ENA \| WM9090_VMID_RES_MASK, 0);
	snd_soc_update_bits(codec, WM9090_ANTIPOP2,
	WM9090_VMID_ENA, 0);
	break;

	case SND_SOC_BIAS_OFF:
	break;
	}

	codec->dapm.bias_level = level;

	return 0;
	}

	static int wm9090_probe(struct snd_soc_codec *codec)
	{
	struct wm9090_priv *wm9090 = dev_get_drvdata(codec->dev);
	int ret;

	codec->control_data = wm9090->regmap;
	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_REGMAP);
	if (ret != 0) {
	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	return ret;
	}

	/* Configure some defaults; they will be written out when we
	* bring the bias up.
	*/
	snd_soc_update_bits(codec, WM9090_IN1_LINE_INPUT_A_VOLUME,
	WM9090_IN1_VU \| WM9090_IN1A_ZC,
	WM9090_IN1_VU \| WM9090_IN1A_ZC);
	snd_soc_update_bits(codec, WM9090_IN1_LINE_INPUT_B_VOLUME,
	WM9090_IN1_VU \| WM9090_IN1B_ZC,
	WM9090_IN1_VU \| WM9090_IN1B_ZC);
	snd_soc_update_bits(codec, WM9090_IN2_LINE_INPUT_A_VOLUME,
	WM9090_IN2_VU \| WM9090_IN2A_ZC,
	WM9090_IN2_VU \| WM9090_IN2A_ZC);
	snd_soc_update_bits(codec, WM9090_IN2_LINE_INPUT_B_VOLUME,
	WM9090_IN2_VU \| WM9090_IN2B_ZC,
	WM9090_IN2_VU \| WM9090_IN2B_ZC);
	snd_soc_update_bits(codec, WM9090_SPEAKER_VOLUME_LEFT,
	WM9090_SPKOUT_VU \| WM9090_SPKOUTL_ZC,
	WM9090_SPKOUT_VU \| WM9090_SPKOUTL_ZC);
	snd_soc_update_bits(codec, WM9090_LEFT_OUTPUT_VOLUME,
	WM9090_HPOUT1_VU \| WM9090_HPOUT1L_ZC,
	WM9090_HPOUT1_VU \| WM9090_HPOUT1L_ZC);
	snd_soc_update_bits(codec, WM9090_RIGHT_OUTPUT_VOLUME,
	WM9090_HPOUT1_VU \| WM9090_HPOUT1R_ZC,
	WM9090_HPOUT1_VU \| WM9090_HPOUT1R_ZC);

	snd_soc_update_bits(codec, WM9090_CLOCKING_1,
	WM9090_TOCLK_ENA, WM9090_TOCLK_ENA);

	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	wm9090_add_controls(codec);

	return 0;
	}

	#ifdef CONFIG_PM
	static int wm9090_suspend(struct snd_soc_codec *codec)
	{
	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
	}

	static int wm9090_resume(struct snd_soc_codec *codec)
	{
	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	return 0;
	}
	#else
	#define wm9090_suspend NULL
	#define wm9090_resume NULL
	#endif

	static int wm9090_remove(struct snd_soc_codec *codec)
	{
	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_dev_wm9090 = {
	.probe = wm9090_probe,
	.remove = wm9090_remove,
	.suspend = wm9090_suspend,
	.resume = wm9090_resume,
	.set_bias_level = wm9090_set_bias_level,
	};

	static const struct regmap_config wm9090_regmap = {
	.reg_bits = 8,
	.val_bits = 16,

	.max_register = WM9090_MAX_REGISTER,
	.volatile_reg = wm9090_volatile,
	.readable_reg = wm9090_readable,

	.cache_type = REGCACHE_RBTREE,
	.reg_defaults = wm9090_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(wm9090_reg_defaults),
	};


	static int wm9090_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *id)
	{
	struct wm9090_priv *wm9090;
	unsigned int reg;
	int ret;

	wm9090 = devm_kzalloc(&i2c->dev, sizeof(*wm9090), GFP_KERNEL);
	if (wm9090 == NULL) {
	dev_err(&i2c->dev, "Can not allocate memory\n");
	return -ENOMEM;
	}

	wm9090->regmap = devm_regmap_init_i2c(i2c, &wm9090_regmap);
	if (IS_ERR(wm9090->regmap)) {
	ret = PTR_ERR(wm9090->regmap);
	dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
	return ret;
	}

	ret = regmap_read(wm9090->regmap, WM9090_SOFTWARE_RESET, &reg);
	if (ret < 0)
	return ret;

	if (reg != 0x9093) {
	dev_err(&i2c->dev, "Device is not a WM9090, ID=%x\n", reg);
	return -ENODEV;
	}

	ret = regmap_write(wm9090->regmap, WM9090_SOFTWARE_RESET, 0);
	if (ret < 0)
	return ret;

	if (i2c->dev.platform_data)
	memcpy(&wm9090->pdata, i2c->dev.platform_data,
	sizeof(wm9090->pdata));

	i2c_set_clientdata(i2c, wm9090);

	ret = snd_soc_register_codec(&i2c->dev,
	&soc_codec_dev_wm9090, NULL, 0);
	if (ret != 0) {
	dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
	return ret;
	}

	return 0;
	}

	static int wm9090_i2c_remove(struct i2c_client *i2c)
	{
	snd_soc_unregister_codec(&i2c->dev);
	return 0;
	}

	static const struct i2c_device_id wm9090_id[] = {
	{ "wm9090", 0 },
	{ "wm9093", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, wm9090_id);

	static struct i2c_driver wm9090_i2c_driver = {
	.driver = {
	.name = "wm9090",
	.owner = THIS_MODULE,
	},
	.probe = wm9090_i2c_probe,
	.remove = wm9090_i2c_remove,
	.id_table = wm9090_id,
	};

	module_i2c_driver(wm9090_i2c_driver);

	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	MODULE_DESCRIPTION("WM9090 ASoC driver");
	MODULE_LICENSE("GPL");