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linux/sound/soc/codecs/lm4857.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

268 lines
6.2 KiB
C
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/*
* LM4857 AMP driver
*
* Copyright 2007 Wolfson Microelectronics PLC.
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com
* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
*
* 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/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
struct lm4857 {
struct i2c_client *i2c;
uint8_t mode;
};
static const uint8_t lm4857_default_regs[] = {
0x00, 0x00, 0x00, 0x00,
};
/* The register offsets in the cache array */
#define LM4857_MVOL 0
#define LM4857_LVOL 1
#define LM4857_RVOL 2
#define LM4857_CTRL 3
/* the shifts required to set these bits */
#define LM4857_3D 5
#define LM4857_WAKEUP 5
#define LM4857_EPGAIN 4
static int lm4857_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
uint8_t data;
int ret;
ret = snd_soc_cache_write(codec, reg, value);
if (ret < 0)
return ret;
data = (reg << 6) | value;
ret = i2c_master_send(codec->control_data, &data, 1);
if (ret != 1) {
dev_err(codec->dev, "Failed to write register: %d\n", ret);
return ret;
}
return 0;
}
static unsigned int lm4857_read(struct snd_soc_codec *codec,
unsigned int reg)
{
unsigned int val;
int ret;
ret = snd_soc_cache_read(codec, reg, &val);
if (ret)
return -1;
return val;
}
static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
ucontrol->value.integer.value[0] = lm4857->mode;
return 0;
}
static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
uint8_t value = ucontrol->value.integer.value[0];
lm4857->mode = value;
if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, value + 6);
return 1;
}
static int lm4857_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, lm4857->mode + 6);
break;
case SND_SOC_BIAS_STANDBY:
snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, 0);
break;
default:
break;
}
codec->dapm.bias_level = level;
return 0;
}
static const char *lm4857_mode[] = {
"Earpiece",
"Loudspeaker",
"Loudspeaker + Headphone",
"Headphone",
};
static const struct soc_enum lm4857_mode_enum =
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode);
static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
SND_SOC_DAPM_OUTPUT("LS"),
SND_SOC_DAPM_OUTPUT("HP"),
SND_SOC_DAPM_OUTPUT("EP"),
};
static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
static const struct snd_kcontrol_new lm4857_controls[] = {
SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
stereo_tlv),
SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
stereo_tlv),
SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
mono_tlv),
SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
LM4857_WAKEUP, 1, 0),
SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
LM4857_EPGAIN, 1, 0),
SOC_ENUM_EXT("Mode", lm4857_mode_enum,
lm4857_get_mode, lm4857_set_mode),
};
/* There is a demux between the input signal and the output signals.
* Currently there is no easy way to model it in ASoC and since it does not make
* much of a difference in practice simply connect the input direclty to the
* outputs. */
static const struct snd_soc_dapm_route lm4857_routes[] = {
{"LS", NULL, "IN"},
{"HP", NULL, "IN"},
{"EP", NULL, "IN"},
};
static int lm4857_probe(struct snd_soc_codec *codec)
{
struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
codec->control_data = lm4857->i2c;
ret = snd_soc_add_codec_controls(codec, lm4857_controls,
ARRAY_SIZE(lm4857_controls));
if (ret)
return ret;
ret = snd_soc_dapm_new_controls(dapm, lm4857_dapm_widgets,
ARRAY_SIZE(lm4857_dapm_widgets));
if (ret)
return ret;
ret = snd_soc_dapm_add_routes(dapm, lm4857_routes,
ARRAY_SIZE(lm4857_routes));
if (ret)
return ret;
snd_soc_dapm_new_widgets(dapm);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
.write = lm4857_write,
.read = lm4857_read,
.probe = lm4857_probe,
.reg_cache_size = ARRAY_SIZE(lm4857_default_regs),
.reg_word_size = sizeof(uint8_t),
.reg_cache_default = lm4857_default_regs,
.set_bias_level = lm4857_set_bias_level,
};
static int __devinit lm4857_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct lm4857 *lm4857;
int ret;
lm4857 = devm_kzalloc(&i2c->dev, sizeof(*lm4857), GFP_KERNEL);
if (!lm4857)
return -ENOMEM;
i2c_set_clientdata(i2c, lm4857);
lm4857->i2c = i2c;
ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
return ret;
}
static int __devexit lm4857_i2c_remove(struct i2c_client *i2c)
{
snd_soc_unregister_codec(&i2c->dev);
return 0;
}
static const struct i2c_device_id lm4857_i2c_id[] = {
{ "lm4857", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
static struct i2c_driver lm4857_i2c_driver = {
.driver = {
.name = "lm4857",
.owner = THIS_MODULE,
},
.probe = lm4857_i2c_probe,
.remove = __devexit_p(lm4857_i2c_remove),
.id_table = lm4857_i2c_id,
};
static int __init lm4857_init(void)
{
return i2c_add_driver(&lm4857_i2c_driver);
}
module_init(lm4857_init);
static void __exit lm4857_exit(void)
{
i2c_del_driver(&lm4857_i2c_driver);
}
module_exit(lm4857_exit);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("LM4857 amplifier driver");
MODULE_LICENSE("GPL");
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