Commit 9db9ed97 authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Mark Brown
Browse files

ASoC: MAX9877: add MAX9877 amp driver 

The MAX9877 combines a high-efficiency Class D audio power amplifier
with a stereo Class AB capacitor-less DirectDrive headphone amplifier.

The max9877_add_controls() is called to register the MAX9877 specific
controls on machine specific init() of the machine driver.

The datasheet for the MAX9877 can find at the following url:
http://datasheets.maxim-ic.com/en/ds/MAX9877.pdf



[Slight edit to sort the ALL_CODECS entries -- broonie.]

Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 3ce91d5a

sound/soc/codecs/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_AK4104 if SPI_MASTER

	select SND_SOC_AK4535 if I2C

	select SND_SOC_CS4270 if I2C

	select SND_SOC_MAX9877 if I2C

	select SND_SOC_PCM3008

	select SND_SOC_SPDIF

	select SND_SOC_SSM2602 if I2C
@@ -188,3 +189,7 @@ config SND_SOC_WM9712 


config SND_SOC_WM9713

	tristate



# Amp

config SND_SOC_MAX9877

	tristate

sound/soc/codecs/Makefile

+6 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ snd-soc-wm9705-objs := wm9705.o 
snd-soc-wm9712-objs := wm9712.o

snd-soc-wm9713-objs := wm9713.o



# Amp

snd-soc-max9877-objs := max9877.o



obj-$(CONFIG_SND_SOC_AC97_CODEC)	+= snd-soc-ac97.o

obj-$(CONFIG_SND_SOC_AD1980)	+= snd-soc-ad1980.o

obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
@@ -77,3 +80,6 @@ obj-$(CONFIG_SND_SOC_WM9081) += snd-soc-wm9081.o 
obj-$(CONFIG_SND_SOC_WM9705)	+= snd-soc-wm9705.o

obj-$(CONFIG_SND_SOC_WM9712)	+= snd-soc-wm9712.o

obj-$(CONFIG_SND_SOC_WM9713)	+= snd-soc-wm9713.o



# Amp

obj-$(CONFIG_SND_SOC_MAX9877)	+= snd-soc-max9877.o

sound/soc/codecs/max9877.c

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/*

 * max9877.c  --  amp driver for max9877

 *

 * Copyright (C) 2009 Samsung Electronics Co.Ltd

 * Author: Joonyoung Shim <jy0922.shim@samsung.com>

 *

 *  This program is free software; you can redistribute  it and/or modify it

 *  under  the terms of  the GNU General  Public License as published by the

 *  Free Software Foundation;  either version 2 of the  License, or (at your

 *  option) any later version.

 *

 */



#include <linux/module.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <sound/soc.h>

#include <sound/tlv.h>



#include "max9877.h"



static struct i2c_client *i2c;



static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 };



static void max9877_write_regs(void)

{

	if (i2c_master_send(i2c, max9877_regs, 5) != 5)

		dev_err(&i2c->dev, "i2c write failed\n");

}



static int max9877_get_reg(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	int reg = mc->reg;

	int reg2 = mc->rreg;

	int shift = mc->shift;

	int mask = mc->max;



	ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;



	if (reg2)

		ucontrol->value.integer.value[1] =

			(max9877_regs[reg2] >> shift) & mask;



	return 0;

}



static int max9877_set_reg(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	int reg = mc->reg;

	int reg2 = mc->rreg;

	int shift = mc->shift;

	int mask = mc->max;

	int change = 1;

	int change2 = 1;

	int ret = 0;



	if (((max9877_regs[reg] >> shift) & mask) ==

			ucontrol->value.integer.value[0])

		change = 0;



	if (reg2)

		if (((max9877_regs[reg2] >> shift) & mask) ==

				ucontrol->value.integer.value[1])

			change2 = 0;



	if (change) {

		max9877_regs[reg] &= ~(mask << shift);

		max9877_regs[reg] |= ucontrol->value.integer.value[0] << shift;

		ret = change;

	}



	if (reg2 && change2) {

		max9877_regs[reg2] &= ~(mask << shift);

		max9877_regs[reg2] |= ucontrol->value.integer.value[1] << shift;

		ret = change2;

	}



	if (ret)

		max9877_write_regs();



	return ret;

}



static int max9877_get_out_mode(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	u8 value = max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK;



	if (value)

		value -= 1;



	ucontrol->value.integer.value[0] = value;

	return 0;

}



static int max9877_set_out_mode(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	u8 value = ucontrol->value.integer.value[0];



	if (value)

		value += 1;



	if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value)

		return 0;



	max9877_regs[MAX9877_OUTPUT_MODE] |= value;

	max9877_write_regs();

	return 1;

}



static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	u8 value = (max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK);



	value = value >> MAX9877_OSC_OFFSET;



	ucontrol->value.integer.value[0] = value;

	return 0;

}



static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol,

		struct snd_ctl_elem_value *ucontrol)

{

	u8 value = ucontrol->value.integer.value[0];



	value = value << MAX9877_OSC_OFFSET;

	if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value)

		return 0;



	max9877_regs[MAX9877_OUTPUT_MODE] |= value;

	max9877_write_regs();

	return 1;

}



static const unsigned int max9877_pgain_tlv[] = {

	TLV_DB_RANGE_HEAD(2),

	0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),

	2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),

};



static const unsigned int max9877_output_tlv[] = {

	TLV_DB_RANGE_HEAD(4),

	0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),

	8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),

	16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),

	24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),

};



static const char *max9877_out_mode[] = {

	"INA -> SPK",

	"INA -> HP",

	"INA -> SPK and HP",

	"INB -> SPK",

	"INB -> HP",

	"INB -> SPK and HP",

	"INA + INB -> SPK",

	"INA + INB -> HP",

	"INA + INB -> SPK and HP",

};



static const char *max9877_osc_mode[] = {

	"1176KHz",

	"1100KHz",

	"700KHz",

};



static const struct soc_enum max9877_enum[] = {

	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode),

	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),

};



static const struct snd_kcontrol_new max9877_controls[] = {

	SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume",

			MAX9877_INPUT_MODE, 0, 2, 0,

			max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),

	SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume",

			MAX9877_INPUT_MODE, 2, 2, 0,

			max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),

	SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume",

			MAX9877_SPK_VOLUME, 0, 31, 0,

			max9877_get_reg, max9877_set_reg, max9877_output_tlv),

	SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume",

			MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,

			max9877_get_reg, max9877_set_reg, max9877_output_tlv),

	SOC_SINGLE_EXT("MAX9877 INB Stereo Switch",

			MAX9877_INPUT_MODE, 4, 1, 1,

			max9877_get_reg, max9877_set_reg),

	SOC_SINGLE_EXT("MAX9877 INA Stereo Switch",

			MAX9877_INPUT_MODE, 5, 1, 1,

			max9877_get_reg, max9877_set_reg),

	SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch",

			MAX9877_INPUT_MODE, 6, 1, 0,

			max9877_get_reg, max9877_set_reg),

	SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch",

			MAX9877_OUTPUT_MODE, 6, 1, 0,

			max9877_get_reg, max9877_set_reg),

	SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch",

			MAX9877_OUTPUT_MODE, 7, 1, 1,

			max9877_get_reg, max9877_set_reg),

	SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0],

			max9877_get_out_mode, max9877_set_out_mode),

	SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1],

			max9877_get_osc_mode, max9877_set_osc_mode),

};



/* This function is called from ASoC machine driver */

int max9877_add_controls(struct snd_soc_codec *codec)

{

	return snd_soc_add_controls(codec, max9877_controls,

			ARRAY_SIZE(max9877_controls));

}

EXPORT_SYMBOL_GPL(max9877_add_controls);



static int __devinit max9877_i2c_probe(struct i2c_client *client,

		const struct i2c_device_id *id)

{

	i2c = client;



	max9877_write_regs();



	return 0;

}



static __devexit int max9877_i2c_remove(struct i2c_client *client)

{

	i2c = NULL;



	return 0;

}



static const struct i2c_device_id max9877_i2c_id[] = {

	{ "max9877", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);



static struct i2c_driver max9877_i2c_driver = {

	.driver = {

		.name = "max9877",

		.owner = THIS_MODULE,

	},

	.probe = max9877_i2c_probe,

	.remove = __devexit_p(max9877_i2c_remove),

	.id_table = max9877_i2c_id,

};



static int __init max9877_init(void)

{

	return i2c_add_driver(&max9877_i2c_driver);

}

module_init(max9877_init);



static void __exit max9877_exit(void)

{

	i2c_del_driver(&max9877_i2c_driver);

}

module_exit(max9877_exit);



MODULE_DESCRIPTION("ASoC MAX9877 amp driver");

MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");

MODULE_LICENSE("GPL");

sound/soc/codecs/max9877.h

0 → 100644
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Original line number Diff line number Diff line 
/*

 * max9877.h  --  amp driver for max9877

 *

 * Copyright (C) 2009 Samsung Electronics Co.Ltd

 * Author: Joonyoung Shim <jy0922.shim@samsung.com>

 *

 *  This program is free software; you can redistribute  it and/or modify it

 *  under  the terms of  the GNU General  Public License as published by the

 *  Free Software Foundation;  either version 2 of the  License, or (at your

 *  option) any later version.

 *

 */



#ifndef _MAX9877_H

#define _MAX9877_H



#define MAX9877_INPUT_MODE		0x00

#define MAX9877_SPK_VOLUME		0x01

#define MAX9877_HPL_VOLUME		0x02

#define MAX9877_HPR_VOLUME		0x03

#define MAX9877_OUTPUT_MODE		0x04



/* MAX9877_INPUT_MODE */

#define MAX9877_INB			(1 << 4)

#define MAX9877_INA			(1 << 5)

#define MAX9877_ZCD			(1 << 6)



/* MAX9877_OUTPUT_MODE */

#define MAX9877_OUTMODE_MASK		(15 << 0)

#define MAX9877_OSC_MASK		(3 << 4)

#define MAX9877_OSC_OFFSET		4

#define MAX9877_BYPASS			(1 << 6)

#define MAX9877_SHDN			(1 << 7)



extern int max9877_add_controls(struct snd_soc_codec *codec);



#endif

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