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/*
* Copyright (C) 2010-2011 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/slab.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/fsl_devices.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/soc-dai.h>
#include <mach/hardware.h>
#include <mach/clock.h>
#include "imx-esai.h"
#include "../codecs/cs42888.h"
struct imx_3stack_pcm_state {
int lr_clk_active;
};
static struct imx_3stack_pcm_state clk_state;
unsigned int mclk_freq;
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)
{
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 *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
unsigned int rate = params_rate(params);
u32 dai_format;
unsigned int lrclk_ratio = 0;
if (clk_state.lr_clk_active > 1)
return 0;
if (cpu_is_mx53()) {
switch (rate) {
case 32000:
lrclk_ratio = 3;
break;
case 48000:
lrclk_ratio = 3;
break;
case 64000:
lrclk_ratio = 1;
break;
case 96000:
lrclk_ratio = 1;
break;
case 128000:
lrclk_ratio = 1;
break;
case 44100:
lrclk_ratio = 3;
break;
case 88200:
lrclk_ratio = 1;
break;
case 176400:
lrclk_ratio = 0;
break;
case 192000:
lrclk_ratio = 0;
break;
default:
pr_info("Rate not support.\n");
return -EINVAL;;
}
} else if (cpu_is_mx6q()) {
switch (rate) {
case 32000:
lrclk_ratio = 5;
break;
case 48000:
lrclk_ratio = 5;
break;
case 64000:
lrclk_ratio = 2;
break;
case 96000:
lrclk_ratio = 2;
break;
case 128000:
lrclk_ratio = 2;
break;
case 44100:
lrclk_ratio = 5;
break;
case 88200:
lrclk_ratio = 2;
break;
case 176400:
lrclk_ratio = 0;
break;
case 192000:
lrclk_ratio = 0;
break;
default:
pr_info("Rate not support.\n");
return -EINVAL;;
}
}
dai_format = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
/* 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, 0x3, 0x3, 2, 32);
/* set the ESAI system clock as output */
if (cpu_is_mx53()) {
snd_soc_dai_set_sysclk(cpu_dai, ESAI_CLK_EXTAL,
mclk_freq, SND_SOC_CLOCK_OUT);
} else if (cpu_is_mx6q()) {
snd_soc_dai_set_sysclk(cpu_dai, ESAI_CLK_EXTAL_DIV,
mclk_freq, SND_SOC_CLOCK_OUT);
}
/* set the ratio */
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_PSR, 1);
if (cpu_is_mx53())
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_PM, 0);
else if (cpu_is_mx6q())
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_PM, 2);
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_FP, lrclk_ratio);
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_PSR, 1);
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_PM, 2);
snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_FP, lrclk_ratio);
/* set codec DAI configuration */
snd_soc_dai_set_fmt(codec_dai, dai_format);
/* set codec Master clock */
snd_soc_dai_set_sysclk(codec_dai, 0, mclk_freq, SND_SOC_CLOCK_IN);
return 0;
}
static struct snd_soc_ops imx_3stack_surround_ops = {
.startup = imx_3stack_startup,
.shutdown = imx_3stack_shutdown,
.hw_params = imx_3stack_surround_hw_params,
};
static const struct snd_soc_dapm_widget imx_3stack_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Line Out Jack", NULL),
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Line out jack */
{"Line Out Jack", NULL, "AOUT1L"},
{"Line Out Jack", NULL, "AOUT1R"},
{"Line Out Jack", NULL, "AOUT2L"},
{"Line Out Jack", NULL, "AOUT2R"},
{"Line Out Jack", NULL, "AOUT3L"},
{"Line Out Jack", NULL, "AOUT3R"},
{"Line Out Jack", NULL, "AOUT4L"},
{"Line Out Jack", NULL, "AOUT4R"},
{"AIN1L", NULL, "Line In Jack"},
{"AIN1R", NULL, "Line In Jack"},
{"AIN2L", NULL, "Line In Jack"},
{"AIN2R", NULL, "Line In Jack"},
};
static int imx_3stack_cs42888_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
snd_soc_dapm_new_controls(&codec->dapm, imx_3stack_dapm_widgets,
ARRAY_SIZE(imx_3stack_dapm_widgets));
snd_soc_dapm_add_routes(&codec->dapm, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_sync(&codec->dapm);
return 0;
}
static struct snd_soc_dai_link imx_3stack_dai[] = {
{
.name = "HiFi",
.stream_name = "HiFi",
.codec_dai_name = "CS42888",
#ifdef CONFIG_SOC_IMX53
.codec_name = "cs42888.1-0048",
#endif
#ifdef CONFIG_SOC_IMX6Q
.codec_name = "cs42888.0-0048",
#endif
.cpu_dai_name = "imx-esai.0",
.platform_name = "imx-pcm-audio.0",
.init = imx_3stack_cs42888_init,
.ops = &imx_3stack_surround_ops,
},
};
static struct snd_soc_card snd_soc_card_imx_3stack = {
.name = "cs42888-audio",
.dai_link = imx_3stack_dai,
.num_links = ARRAY_SIZE(imx_3stack_dai),
};
/*
* This function will register the snd_soc_pcm_link drivers.
*/
static int __devinit imx_3stack_cs42888_probe(struct platform_device *pdev)
{
struct mxc_audio_platform_data *plat_data = pdev->dev.platform_data;
mclk_freq = plat_data->sysclk;
return 0;
}
static int __devexit imx_3stack_cs42888_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver imx_3stack_cs42888_driver = {
.probe = imx_3stack_cs42888_probe,
.remove = __devexit_p(imx_3stack_cs42888_remove),
.driver = {
.name = "imx-cs42888",
.owner = THIS_MODULE,
},
};
static struct platform_device *imx_3stack_snd_device;
static int __init imx_3stack_asoc_init(void)
{
int ret;
pr_info("imx_3stack asoc driver\n");
ret = platform_driver_register(&imx_3stack_cs42888_driver);
if (ret < 0)
goto exit;
imx_3stack_snd_device = platform_device_alloc("soc-audio", 2);
if (!imx_3stack_snd_device)
goto err_device_alloc;
platform_set_drvdata(imx_3stack_snd_device, &snd_soc_card_imx_3stack);
ret = platform_device_add(imx_3stack_snd_device);
if (0 == ret)
goto exit;
platform_device_unregister(imx_3stack_snd_device);
err_device_alloc:
platform_driver_unregister(&imx_3stack_cs42888_driver);
exit:
return ret;
}
static void __exit imx_3stack_asoc_exit(void)
{
platform_driver_unregister(&imx_3stack_cs42888_driver);
platform_device_unregister(imx_3stack_snd_device);
}
module_init(imx_3stack_asoc_init);
module_exit(imx_3stack_asoc_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("ALSA SoC cs42888 Machine Layer Driver");
MODULE_LICENSE("GPL");
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