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linux/sound/soc/codecs/max9877.c
Liam Girdwood 022658beab ASoC: core: Add support for DAI and machine kcontrols. 
Currently ASoC can only add kcontrols using codec and platform component device
handles. It's also desirable to add kcontrols for DAIs (i.e. McBSP) and for
SoC card machine drivers too. This allows the kcontrol to have a direct handle to
the parent ASoC component DAI/SoC Card/Platform/Codec device and hence easily
get it's private data.

This change makes snd_soc_add_controls() static and wraps it in the folowing
calls (card and dai are new) :-

snd_soc_add_card_controls()
snd_soc_add_codec_controls()
snd_soc_add_dai_controls()
snd_soc_add_platform_controls()

This patch also does a lot of small mechanical changes in individual codec drivers
to replace snd_soc_add_controls() with snd_soc_add_codec_controls().

It also updates the McBSP DAI driver to use snd_soc_add_dai_controls().

Finally, it updates the existing machine drivers that register controls to either :-

1) Use snd_soc_add_card_controls() where no direct codec control is required.
2) Use snd_soc_add_codec_controls() where there is direct codec control.

In the case of 1) above we also update the machine drivers to get the correct
component data pointers from the kcontrol (rather than getting the machine pointer
via the codec pointer).

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-04 12:40:11 +00:00

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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)
{
unsigned int i;
u8 data[6];
data[0] = MAX9877_INPUT_MODE;
for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
data[i + 1] = max9877_regs[i];
if (i2c_master_send(i2c, data, 6) != 6)
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;
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int mask = mc->max;
unsigned int invert = mc->invert;
ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
if (invert)
ucontrol->value.integer.value[0] =
mask - ucontrol->value.integer.value[0];
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;
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int mask = mc->max;
unsigned int invert = mc->invert;
unsigned int val = (ucontrol->value.integer.value[0] & mask);
if (invert)
val = mask - val;
if (((max9877_regs[reg] >> shift) & mask) == val)
return 0;
max9877_regs[reg] &= ~(mask << shift);
max9877_regs[reg] |= val << shift;
max9877_write_regs();
return 1;
}
static int max9877_get_2reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
unsigned int mask = mc->max;
ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
ucontrol->value.integer.value[1] = (max9877_regs[reg2] >> shift) & mask;
return 0;
}
static int max9877_set_2reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
unsigned int mask = mc->max;
unsigned int val = (ucontrol->value.integer.value[0] & mask);
unsigned int val2 = (ucontrol->value.integer.value[1] & mask);
unsigned int change = 0;
if (((max9877_regs[reg] >> shift) & mask) != val)
change = 1;
if (((max9877_regs[reg2] >> shift) & mask) != val2)
change = 1;
if (change) {
max9877_regs[reg] &= ~(mask << shift);
max9877_regs[reg] |= val << shift;
max9877_regs[reg2] &= ~(mask << shift);
max9877_regs[reg2] |= val2 << shift;
max9877_write_regs();
}
return change;
}
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];
value += 1;
if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value)
return 0;
max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OUTMODE_MASK;
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] &= ~MAX9877_OSC_MASK;
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_2reg, max9877_set_2reg, 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_codec_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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