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: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Joonyoung Shim 2009-07-15 20:34:00 +09:00 committed by Mark Brown
parent 3ce91d5a5a
commit 9db9ed977d
4 changed files with 318 additions and 0 deletions

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@ -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

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@ -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

270
sound/soc/codecs/max9877.c Normal file
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@ -0,0 +1,270 @@
/*
* 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");

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@ -0,0 +1,37 @@
/*
* 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