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/*
* imx-3stack-ak5702.c -- SoC audio for imx_3stack
*
* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <mach/hardware.h>
#include <mach/clock.h>
#include "imx-pcm.h"
#include "imx-esai.h"
#include "../codecs/ak5702.h"
struct imx_3stack_pcm_state {
int lr_clk_active;
};
static struct imx_3stack_pcm_state clk_state;
static int imx_3stack_startup(struct snd_pcm_substream *substream)
{
clk_state.lr_clk_active++;
return 0;
}
static void imx_3stack_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai_link *pcm_link = rtd->dai;
struct snd_soc_dai *codec_dai = pcm_link->codec_dai;
/* disable the PLL if there are no active Rx channels */
if (!codec_dai->active)
snd_soc_dai_set_pll(codec_dai, 0, 0, 0);
clk_state.lr_clk_active--;
}
static int imx_3stack_surround_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_link *pcm_link = rtd->dai;
struct snd_soc_dai *cpu_dai = pcm_link->cpu_dai;
struct snd_soc_dai *codec_dai = pcm_link->codec_dai;
unsigned int rate = params_rate(params);
struct imx_esai *esai_mode = (struct imx_esai *)cpu_dai->private_data;
u32 dai_format;
if (clk_state.lr_clk_active > 1)
return 0;
dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
esai_mode->sync_mode = 0;
esai_mode->network_mode = 1;
/* set codec DAI configuration */
snd_soc_dai_set_fmt(codec_dai, dai_format);
/* set cpu DAI configuration */
snd_soc_dai_set_fmt(cpu_dai, dai_format);
/* set i.MX active slot mask */
snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffff, 2);
/* set the ESAI system clock as input */
snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
/* set codec BCLK division */
snd_soc_dai_set_clkdiv(codec_dai, AK5702_BCLK_CLKDIV,
AK5702_BCLK_DIV_32);
snd_soc_dai_set_sysclk(codec_dai, 0, rate, SND_SOC_CLOCK_OUT);
snd_soc_dai_set_pll(codec_dai, 1, 12000000, 0);
return 0;
}
/*
* imx_3stack ak5702 DAI opserations.
*/
static struct snd_soc_ops imx_3stack_surround_ops = {
.startup = imx_3stack_startup,
.shutdown = imx_3stack_shutdown,
.hw_params = imx_3stack_surround_hw_params,
};
/* imx_3stack card dapm widgets */
static const struct snd_soc_dapm_widget imx_3stack_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
/* example card audio map */
static const struct snd_soc_dapm_route audio_map[] = {
/* Line in jack */
{"ADCA Left Input", NULL, "Line In Jack"},
{"ADCA Right Input", NULL, "Line In Jack"},
{"ADCB Left Input", NULL, "Line In Jack"},
{"ADCB Right Input", NULL, "Line In Jack"},
};
static int imx_3stack_ak5702_init(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, imx_3stack_dapm_widgets,
ARRAY_SIZE(imx_3stack_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_sync(codec);
return 0;
}
static struct snd_soc_dai_link imx_3stack_dai = {
.name = "ak5702",
.stream_name = "ak5702",
.codec_dai = &ak5702_dai,
.init = imx_3stack_ak5702_init,
.ops = &imx_3stack_surround_ops,
};
static int imx_3stack_card_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
kfree(socdev->codec_data);
return 0;
}
static struct snd_soc_card snd_soc_card_imx_3stack = {
.name = "imx-3stack",
.platform = &imx_soc_platform,
.dai_link = &imx_3stack_dai,
.num_links = 1,
.remove = imx_3stack_card_remove,
};
static struct snd_soc_device imx_3stack_snd_devdata = {
.card = &snd_soc_card_imx_3stack,
.codec_dev = &soc_codec_dev_ak5702,
};
static int __devinit imx_3stack_ak5702_probe(struct platform_device *pdev)
{
struct ak5702_setup_data *setup;
imx_3stack_dai.cpu_dai = &imx_esai_dai[2];
setup = kzalloc(sizeof(struct ak5702_setup_data), GFP_KERNEL);
setup->i2c_bus = 1;
setup->i2c_address = 0x13;
imx_3stack_snd_devdata.codec_data = setup;
return 0;
}
static int imx_3stack_ak5702_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver imx_3stack_ak5702_driver = {
.probe = imx_3stack_ak5702_probe,
.remove = imx_3stack_ak5702_remove,
.driver = {
.name = "imx-3stack-ak5702",
},
};
static struct platform_device *imx_3stack_snd_device;
static int __init imx_3stack_asoc_init(void)
{
int ret;
ret = platform_driver_register(&imx_3stack_ak5702_driver);
if (ret)
return -ENOMEM;
imx_3stack_snd_device = platform_device_alloc("soc-audio", -1);
if (!imx_3stack_snd_device)
return -ENOMEM;
platform_set_drvdata(imx_3stack_snd_device, &imx_3stack_snd_devdata);
imx_3stack_snd_devdata.dev = &imx_3stack_snd_device->dev;
ret = platform_device_add(imx_3stack_snd_device);
if (ret)
platform_device_put(imx_3stack_snd_device);
return ret;
}
static void __exit imx_3stack_asoc_exit(void)
{
platform_driver_unregister(&imx_3stack_ak5702_driver);
platform_device_unregister(imx_3stack_snd_device);
}
module_init(imx_3stack_asoc_init);
module_exit(imx_3stack_asoc_exit);
/* Module information */
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("ALSA SoC ak5702 imx_3stack");
MODULE_LICENSE("GPL");
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