/* sound/soc/s3c24xx/s3c64xx-i2s-v4.c
*
* ALSA SoC Audio Layer - S3C64XX I2Sv4 driver
* Copyright (c) 2010 Samsung Electronics Co. Ltd
* Author: Jaswinder Singh <jassi.brar@samsung.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/clk.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <mach/gpio-bank-c.h>
#include <mach/gpio-bank-h.h>
#include <plat/gpio-cfg.h>
#include <mach/map.h>
#include <mach/dma.h>
#include "s3c-dma.h"
#include "regs-i2s-v2.h"
#include "s3c64xx-i2s.h"
static struct s3c2410_dma_client s3c64xx_dma_client_out = {
.name = "I2Sv4 PCM Stereo out"
};
static struct s3c2410_dma_client s3c64xx_dma_client_in = {
.name = "I2Sv4 PCM Stereo in"
};
static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
static struct s3c_i2sv2_info s3c64xx_i2sv4;
struct snd_soc_dai s3c64xx_i2s_v4_dai;
EXPORT_SYMBOL_GPL(s3c64xx_i2s_v4_dai);
static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
{
return cpu_dai->private_data;
}
static int s3c64xx_i2sv4_probe(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
/* configure GPIO for i2s port */
s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_I2S_V40_DO0);
s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_I2S_V40_DO1);
s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C64XX_GPC7_I2S_V40_DO2);
s3c_gpio_cfgpin(S3C64XX_GPH(6), S3C64XX_GPH6_I2S_V40_BCLK);
s3c_gpio_cfgpin(S3C64XX_GPH(7), S3C64XX_GPH7_I2S_V40_CDCLK);
s3c_gpio_cfgpin(S3C64XX_GPH(8), S3C64XX_GPH8_I2S_V40_LRCLK);
s3c_gpio_cfgpin(S3C64XX_GPH(9), S3C64XX_GPH9_I2S_V40_DI);
return 0;
}
static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
struct s3c_dma_params *dma_data;
u32 iismod;
dev_dbg(cpu_dai->dev, "Entered %s\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dma_data = i2s->dma_playback;
else
dma_data = i2s->dma_capture;
snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
iismod = readl(i2s->regs + S3C2412_IISMOD);
dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);
iismod &= ~S3C64XX_IISMOD_BLC_MASK;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
iismod |= S3C64XX_IISMOD_BLC_8BIT;
break;
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S24_LE:
iismod |= S3C64XX_IISMOD_BLC_24BIT;
break;
}
writel(iismod, i2s->regs + S3C2412_IISMOD);
dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);
return 0;
}
static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
.hw_params = s3c_i2sv4_hw_params,
};
static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
{
struct s3c_i2sv2_info *i2s;
struct snd_soc_dai *dai;
int ret;
i2s = &s3c64xx_i2sv4;
dai = &s3c64xx_i2s_v4_dai;
if (dai->dev) {
dev_dbg(dai->dev, "%s: \
I2Sv4 instance already registered!\n", __func__);
return -EBUSY;
}
dai->dev = &pdev->dev;
dai->name = "s3c64xx-i2s-v4";
dai->id = 0;
dai->symmetric_rates = 1;
dai->playback.channels_min = 2;
dai->playback.channels_max = 2;
dai->playback.rates = S3C64XX_I2S_RATES;
dai->playback.formats = S3C64XX_I2S_FMTS;
dai->capture.channels_min = 2;
dai->capture.channels_max = 2;
dai->capture.rates = S3C64XX_I2S_RATES;
dai->capture.formats = S3C64XX_I2S_FMTS;
dai->probe = s3c64xx_i2sv4_probe;
dai->ops = &s3c64xx_i2sv4_dai_ops;
i2s->feature |= S3C_FEATURE_CDCLKCON;
i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
i2s->dma_capture->channel = DMACH_HSI_I2SV40_RX;
i2s->dma_capture->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISRXD;
i2s->dma_playback->channel = DMACH_HSI_I2SV40_TX;
i2s->dma_playback->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISTXD;
i2s->dma_capture->client = &s3c64xx_dma_client_in;
i2s->dma_capture->dma_size = 4;
i2s->dma_playback->client = &s3c64xx_dma_client_out;
i2s->dma_playback->dma_size = 4;
i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
if (IS_ERR(i2s->iis_cclk)) {
dev_err(&pdev->dev, "failed to get audio-bus\n");
ret = PTR_ERR(i2s->iis_cclk);
goto err;
}
clk_enable(i2s->iis_cclk);
ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
if (ret)
goto err_clk;
ret = s3c_i2sv2_register_dai(dai);
if (ret != 0)
goto err_i2sv2;
return 0;
err_i2sv2:
/* Not implemented for I2Sv2 core yet */
err_clk:
clk_put(i2s->iis_cclk);
err:
return ret;
}
static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
{
dev_err(&pdev->dev, "Device removal not yet supported\n");
return 0;
}
static struct platform_driver s3c64xx_i2sv4_driver = {
.probe = s3c64xx_i2sv4_dev_probe,
.remove = s3c64xx_i2sv4_dev_remove,
.driver = {
.name = "s3c64xx-iis-v4",
.owner = THIS_MODULE,
},
};
static int __init s3c64xx_i2sv4_init(void)
{
return platform_driver_register(&s3c64xx_i2sv4_driver);
}
module_init(s3c64xx_i2sv4_init);
static void __exit s3c64xx_i2sv4_exit(void)
{
platform_driver_unregister(&s3c64xx_i2sv4_driver);
}
module_exit(s3c64xx_i2sv4_exit);
/* Module information */
MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
MODULE_LICENSE("GPL");
