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linux-next/sound/soc/pxa/corgi.c
Mark Brown 5998102b90 ASoC: Refactor WM8731 device registration 
Move the WM8731 driver to use a more standard device registration
scheme where the device can be registered independantly of the ASoC
probe.

As a transition measure push the current manual code for registering
the WM8731 into the individual machine driver probes. This allows
separate patches to update the relevant architecture files with less
risk of merge issues.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-02-18 11:55:22 +00:00

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/*
* corgi.c -- SoC audio for Corgi
*
* Copyright 2005 Wolfson Microelectronics PLC.
* Copyright 2005 Openedhand Ltd.
*
* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
* Richard Purdie <richard@openedhand.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/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/mach-types.h>
#include <mach/pxa-regs.h>
#include <mach/hardware.h>
#include <mach/corgi.h>
#include <mach/audio.h>
#include "../codecs/wm8731.h"
#include "pxa2xx-pcm.h"
#include "pxa2xx-i2s.h"
#define CORGI_HP 0
#define CORGI_MIC 1
#define CORGI_LINE 2
#define CORGI_HEADSET 3
#define CORGI_HP_OFF 4
#define CORGI_SPK_ON 0
#define CORGI_SPK_OFF 1
/* audio clock in Hz - rounded from 12.235MHz */
#define CORGI_AUDIO_CLOCK 12288000
static int corgi_jack_func;
static int corgi_spk_func;
static void corgi_ext_control(struct snd_soc_codec *codec)
{
/* set up jack connection */
switch (corgi_jack_func) {
case CORGI_HP:
/* set = unmute headphone */
gpio_set_value(CORGI_GPIO_MUTE_L, 1);
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
snd_soc_dapm_disable_pin(codec, "Mic Jack");
snd_soc_dapm_disable_pin(codec, "Line Jack");
snd_soc_dapm_enable_pin(codec, "Headphone Jack");
snd_soc_dapm_disable_pin(codec, "Headset Jack");
break;
case CORGI_MIC:
/* reset = mute headphone */
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
gpio_set_value(CORGI_GPIO_MUTE_R, 0);
snd_soc_dapm_enable_pin(codec, "Mic Jack");
snd_soc_dapm_disable_pin(codec, "Line Jack");
snd_soc_dapm_disable_pin(codec, "Headphone Jack");
snd_soc_dapm_disable_pin(codec, "Headset Jack");
break;
case CORGI_LINE:
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
gpio_set_value(CORGI_GPIO_MUTE_R, 0);
snd_soc_dapm_disable_pin(codec, "Mic Jack");
snd_soc_dapm_enable_pin(codec, "Line Jack");
snd_soc_dapm_disable_pin(codec, "Headphone Jack");
snd_soc_dapm_disable_pin(codec, "Headset Jack");
break;
case CORGI_HEADSET:
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
snd_soc_dapm_enable_pin(codec, "Mic Jack");
snd_soc_dapm_disable_pin(codec, "Line Jack");
snd_soc_dapm_disable_pin(codec, "Headphone Jack");
snd_soc_dapm_enable_pin(codec, "Headset Jack");
break;
}
if (corgi_spk_func == CORGI_SPK_ON)
snd_soc_dapm_enable_pin(codec, "Ext Spk");
else
snd_soc_dapm_disable_pin(codec, "Ext Spk");
/* signal a DAPM event */
snd_soc_dapm_sync(codec);
}
static int corgi_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->socdev->card->codec;
/* check the jack status at stream startup */
corgi_ext_control(codec);
return 0;
}
/* we need to unmute the HP at shutdown as the mute burns power on corgi */
static void corgi_shutdown(struct snd_pcm_substream *substream)
{
/* set = unmute headphone */
gpio_set_value(CORGI_GPIO_MUTE_L, 1);
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
}
static int corgi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
unsigned int clk = 0;
int ret = 0;
switch (params_rate(params)) {
case 8000:
case 16000:
case 48000:
case 96000:
clk = 12288000;
break;
case 11025:
case 22050:
case 44100:
clk = 11289600;
break;
}
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, clk,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set the I2S system clock as input (unused) */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops corgi_ops = {
.startup = corgi_startup,
.hw_params = corgi_hw_params,
.shutdown = corgi_shutdown,
};
static int corgi_get_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = corgi_jack_func;
return 0;
}
static int corgi_set_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
if (corgi_jack_func == ucontrol->value.integer.value[0])
return 0;
corgi_jack_func = ucontrol->value.integer.value[0];
corgi_ext_control(codec);
return 1;
}
static int corgi_get_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = corgi_spk_func;
return 0;
}
static int corgi_set_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
if (corgi_spk_func == ucontrol->value.integer.value[0])
return 0;
corgi_spk_func = ucontrol->value.integer.value[0];
corgi_ext_control(codec);
return 1;
}
static int corgi_amp_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static int corgi_mic_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
/* corgi machine dapm widgets */
static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
SND_SOC_DAPM_LINE("Line Jack", NULL),
SND_SOC_DAPM_HP("Headset Jack", NULL),
};
/* Corgi machine audio map (connections to the codec pins) */
static const struct snd_soc_dapm_route audio_map[] = {
/* headset Jack - in = micin, out = LHPOUT*/
{"Headset Jack", NULL, "LHPOUT"},
/* headphone connected to LHPOUT1, RHPOUT1 */
{"Headphone Jack", NULL, "LHPOUT"},
{"Headphone Jack", NULL, "RHPOUT"},
/* speaker connected to LOUT, ROUT */
{"Ext Spk", NULL, "ROUT"},
{"Ext Spk", NULL, "LOUT"},
/* mic is connected to MICIN (via right channel of headphone jack) */
{"MICIN", NULL, "Mic Jack"},
/* Same as the above but no mic bias for line signals */
{"MICIN", NULL, "Line Jack"},
};
static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
"Off"};
static const char *spk_function[] = {"On", "Off"};
static const struct soc_enum corgi_enum[] = {
SOC_ENUM_SINGLE_EXT(5, jack_function),
SOC_ENUM_SINGLE_EXT(2, spk_function),
};
static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
corgi_set_jack),
SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
corgi_set_spk),
};
/*
* Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
*/
static int corgi_wm8731_init(struct snd_soc_codec *codec)
{
int i, err;
snd_soc_dapm_nc_pin(codec, "LLINEIN");
snd_soc_dapm_nc_pin(codec, "RLINEIN");
/* Add corgi specific controls */
for (i = 0; i < ARRAY_SIZE(wm8731_corgi_controls); i++) {
err = snd_ctl_add(codec->card,
snd_soc_cnew(&wm8731_corgi_controls[i], codec, NULL));
if (err < 0)
return err;
}
/* Add corgi specific widgets */
snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
ARRAY_SIZE(wm8731_dapm_widgets));
/* Set up corgi specific audio path audio_map */
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_sync(codec);
return 0;
}
/* corgi digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link corgi_dai = {
.name = "WM8731",
.stream_name = "WM8731",
.cpu_dai = &pxa_i2s_dai,
.codec_dai = &wm8731_dai,
.init = corgi_wm8731_init,
.ops = &corgi_ops,
};
/* corgi audio machine driver */
static struct snd_soc_card snd_soc_corgi = {
.name = "Corgi",
.platform = &pxa2xx_soc_platform,
.dai_link = &corgi_dai,
.num_links = 1,
};
/* corgi audio subsystem */
static struct snd_soc_device corgi_snd_devdata = {
.card = &snd_soc_corgi,
.codec_dev = &soc_codec_dev_wm8731,
};
/*
* FIXME: This is a temporary bodge to avoid cross-tree merge issues.
* New drivers should register the wm8731 I2C device in the machine
* setup code (under arch/arm for ARM systems).
*/
static int wm8731_i2c_register(void)
{
struct i2c_board_info info;
struct i2c_adapter *adapter;
struct i2c_client *client;
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = 0x1b;
strlcpy(info.type, "wm8731", I2C_NAME_SIZE);
adapter = i2c_get_adapter(0);
if (!adapter) {
printk(KERN_ERR "can't get i2c adapter 0\n");
return -ENODEV;
}
client = i2c_new_device(adapter, &info);
i2c_put_adapter(adapter);
if (!client) {
printk(KERN_ERR "can't add i2c device at 0x%x\n",
(unsigned int)info.addr);
return -ENODEV;
}
return 0;
}
static struct platform_device *corgi_snd_device;
static int __init corgi_init(void)
{
int ret;
if (!(machine_is_corgi() || machine_is_shepherd() ||
machine_is_husky()))
return -ENODEV;
ret = wm8731_i2c_setup();
if (ret != 0)
return ret;
corgi_snd_device = platform_device_alloc("soc-audio", -1);
if (!corgi_snd_device)
return -ENOMEM;
platform_set_drvdata(corgi_snd_device, &corgi_snd_devdata);
corgi_snd_devdata.dev = &corgi_snd_device->dev;
ret = platform_device_add(corgi_snd_device);
if (ret)
platform_device_put(corgi_snd_device);
return ret;
}
static void __exit corgi_exit(void)
{
platform_device_unregister(corgi_snd_device);
}
module_init(corgi_init);
module_exit(corgi_exit);
/* Module information */
MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Corgi");
MODULE_LICENSE("GPL");
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