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DEFINITIONS
This source file includes following definitions.
- corgi_ext_control
- corgi_startup
- corgi_shutdown
- corgi_hw_params
- corgi_get_jack
- corgi_set_jack
- corgi_get_spk
- corgi_set_spk
- corgi_amp_event
- corgi_mic_event
- corgi_wm8731_init
- corgi_init
- corgi_exit
/*
* 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->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 int corgi_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->socdev->codec;
/* set = unmute headphone */
gpio_set_value(CORGI_GPIO_MUTE_L, 1);
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
return 0;
}
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_machine snd_soc_machine_corgi = {
.name = "Corgi",
.dai_link = &corgi_dai,
.num_links = 1,
};
/* corgi audio private data */
static struct wm8731_setup_data corgi_wm8731_setup = {
.i2c_bus = 0,
.i2c_address = 0x1b,
};
/* corgi audio subsystem */
static struct snd_soc_device corgi_snd_devdata = {
.machine = &snd_soc_machine_corgi,
.platform = &pxa2xx_soc_platform,
.codec_dev = &soc_codec_dev_wm8731,
.codec_data = &corgi_wm8731_setup,
};
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;
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");