qi_lb60.c
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/*
* Copyright (C) 2009, 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 version 2 as
* published by the Free Software Foundation.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <linux/gpio.h>
#define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
#define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
struct snd_kcontrol *ctrl, int event)
{
int on = !SND_SOC_DAPM_EVENT_OFF(event);
gpio_set_value(QI_LB60_SND_GPIO, on);
gpio_set_value(QI_LB60_AMP_GPIO, on);
return 0;
}
static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
SND_SOC_DAPM_MIC("Mic", NULL),
};
static const struct snd_soc_dapm_route qi_lb60_routes[] = {
{"Mic", NULL, "MIC"},
{"Speaker", NULL, "LOUT"},
{"Speaker", NULL, "ROUT"},
};
#define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
SND_SOC_DAIFMT_NB_NF | \
SND_SOC_DAIFMT_CBM_CFM)
static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
snd_soc_dapm_nc_pin(dapm, "LIN");
snd_soc_dapm_nc_pin(dapm, "RIN");
ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
return ret;
}
return 0;
}
static struct snd_soc_dai_link qi_lb60_dai = {
.name = "jz4740",
.stream_name = "jz4740",
.cpu_dai_name = "jz4740-i2s",
.platform_name = "jz4740-pcm-audio",
.codec_dai_name = "jz4740-hifi",
.codec_name = "jz4740-codec",
.init = qi_lb60_codec_init,
};
static struct snd_soc_card qi_lb60 = {
.name = "QI LB60",
.owner = THIS_MODULE,
.dai_link = &qi_lb60_dai,
.num_links = 1,
.dapm_widgets = qi_lb60_widgets,
.num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
.dapm_routes = qi_lb60_routes,
.num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
};
static struct platform_device *qi_lb60_snd_device;
static const struct gpio qi_lb60_gpios[] = {
{ QI_LB60_SND_GPIO, GPIOF_OUT_INIT_LOW, "SND" },
{ QI_LB60_AMP_GPIO, GPIOF_OUT_INIT_LOW, "AMP" },
};
static int __init qi_lb60_init(void)
{
int ret;
qi_lb60_snd_device = platform_device_alloc("soc-audio", -1);
if (!qi_lb60_snd_device)
return -ENOMEM;
ret = gpio_request_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
if (ret) {
pr_err("qi_lb60 snd: Failed to request gpios: %d\n", ret);
goto err_device_put;
}
platform_set_drvdata(qi_lb60_snd_device, &qi_lb60);
ret = platform_device_add(qi_lb60_snd_device);
if (ret) {
pr_err("qi_lb60 snd: Failed to add snd soc device: %d\n", ret);
goto err_unset_pdata;
}
return 0;
err_unset_pdata:
platform_set_drvdata(qi_lb60_snd_device, NULL);
/*err_gpio_free_array:*/
gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
err_device_put:
platform_device_put(qi_lb60_snd_device);
return ret;
}
module_init(qi_lb60_init);
static void __exit qi_lb60_exit(void)
{
platform_device_unregister(qi_lb60_snd_device);
gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
}
module_exit(qi_lb60_exit);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
MODULE_LICENSE("GPL v2");