/*
* ASoC driver for Stretch s6105 IP camera platform
*
* Author: Daniel Gloeckner, <dg@emlix.com>
* Copyright: (C) 2009 emlix GmbH <info@emlix.com>
*
* 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.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include "s6000-pcm.h"
#include "s6000-i2s.h"
#define S6105_CAM_CODEC_CLOCK 12288000
static int s6105_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->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0;
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_NB_NF);
if (ret < 0)
return ret;
/* set the codec system clock */
ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops s6105_ops = {
.hw_params = s6105_hw_params,
};
/* s6105 machine dapm widgets */
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
SND_SOC_DAPM_LINE("Audio In", NULL),
};
/* s6105 machine audio_mapnections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
/* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
{"Audio Out Differential", NULL, "HPLOUT"},
{"Audio Out Differential", NULL, "HPLCOM"},
{"Audio Out Stereo", NULL, "HPLOUT"},
{"Audio Out Stereo", NULL, "HPROUT"},
/* Audio In connected to LINE1L, LINE1R */
{"LINE1L", NULL, "Audio In"},
{"LINE1R", NULL, "Audio In"},
};
static int output_type_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = 2;
if (uinfo->value.enumerated.item) {
uinfo->value.enumerated.item = 1;
strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
} else {
strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
}
return 0;
}
static int output_type_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = kcontrol->private_value;
return 0;
}
static int output_type_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = kcontrol->private_data;
struct snd_soc_dapm_context *dapm = &card->dapm;
unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
char *differential = "Audio Out Differential";
char *stereo = "Audio Out Stereo";
if (kcontrol->private_value == val)
return 0;
kcontrol->private_value = val;
snd_soc_dapm_disable_pin(dapm, val ? differential : stereo);
snd_soc_dapm_sync(dapm);
snd_soc_dapm_enable_pin(dapm, val ? stereo : differential);
snd_soc_dapm_sync(dapm);
return 1;
}
static const struct snd_kcontrol_new audio_out_mux = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Master Output Mux",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.info = output_type_info,
.get = output_type_get,
.put = output_type_put,
.private_value = 1 /* default to stereo */
};
/* Logic for a aic3x as connected on the s6105 ip camera ref design */
static int s6105_aic3x_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_card *card = rtd->card;
/* must correspond to audio_out_mux.private_value initializer */
snd_soc_dapm_disable_pin(&card->dapm, "Audio Out Differential");
snd_ctl_add(card->snd_card, snd_ctl_new1(&audio_out_mux, card));
return 0;
}
/* s6105 digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link s6105_dai = {
.name = "TLV320AIC31",
.stream_name = "AIC31",
.cpu_dai_name = "s6000-i2s",
.codec_dai_name = "tlv320aic3x-hifi",
.platform_name = "s6000-pcm-audio",
.codec_name = "tlv320aic3x-codec.0-001a",
.init = s6105_aic3x_init,
.ops = &s6105_ops,
};
/* s6105 audio machine driver */
static struct snd_soc_card snd_soc_card_s6105 = {
.name = "Stretch IP Camera",
.owner = THIS_MODULE,
.dai_link = &s6105_dai,
.num_links = 1,
.dapm_widgets = aic3x_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(aic3x_dapm_widgets),
.dapm_routes = audio_map,
.num_dapm_routes = ARRAY_SIZE(audio_map),
.fully_routed = true,
};
static struct s6000_snd_platform_data s6105_snd_data __initdata = {
.wide = 0,
.channel_in = 0,
.channel_out = 1,
.lines_in = 1,
.lines_out = 1,
.same_rate = 1,
};
static struct platform_device *s6105_snd_device;
/* temporary i2c device creation until this can be moved into the machine
* support file.
*/
static struct i2c_board_info i2c_device[] = {
{ I2C_BOARD_INFO("tlv320aic33", 0x18), }
};
static int __init s6105_init(void)
{
int ret;
i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
s6105_snd_device = platform_device_alloc("soc-audio", -1);
if (!s6105_snd_device)
return -ENOMEM;
platform_set_drvdata(s6105_snd_device, &snd_soc_card_s6105);
platform_device_add_data(s6105_snd_device, &s6105_snd_data,
sizeof(s6105_snd_data));
ret = platform_device_add(s6105_snd_device);
if (ret)
platform_device_put(s6105_snd_device);
return ret;
}
static void __exit s6105_exit(void)
{
platform_device_unregister(s6105_snd_device);
}
module_init(s6105_init);
module_exit(s6105_exit);
MODULE_AUTHOR("Daniel Gloeckner");
MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
MODULE_LICENSE("GPL");
