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/* 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 <plat/audio.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;
static int s3c64xx_i2sv4_probe(struct snd_soc_dai *dai)
{
struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
int ret = 0;
snd_soc_dai_set_drvdata(dai, i2s);
ret = s3c_i2sv2_probe(dai, i2s, i2s->base);
return ret;
}
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 = snd_soc_dai_get_drvdata(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 struct snd_soc_dai_driver s3c64xx_i2s_v4_dai = {
.symmetric_rates = 1,
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C64XX_I2S_RATES,
.formats = S3C64XX_I2S_FMTS,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C64XX_I2S_RATES,
.formats = S3C64XX_I2S_FMTS,
},
.probe = s3c64xx_i2sv4_probe,
.ops = &s3c64xx_i2sv4_dai_ops,
};
static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
{
struct s3c_audio_pdata *i2s_pdata;
struct s3c_i2sv2_info *i2s;
struct resource *res;
int ret;
i2s = &s3c64xx_i2sv4;
i2s->feature |= S3C_FEATURE_CDCLKCON;
i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
return -ENXIO;
}
i2s->dma_playback->channel = res->start;
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res) {
dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
return -ENXIO;
}
i2s->dma_capture->channel = res->start;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
return -ENXIO;
}
if (!request_mem_region(res->start, resource_size(res),
"s3c64xx-i2s-v4")) {
dev_err(&pdev->dev, "Unable to request SFR region\n");
return -EBUSY;
}
i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD;
i2s->dma_playback->dma_addr = res->start + 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->base = res->start;
i2s_pdata = pdev->dev.platform_data;
if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
dev_err(&pdev->dev, "Unable to configure gpio\n");
return -EINVAL;
}
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_register_dai(&pdev->dev, pdev->id, &s3c64xx_i2s_v4_dai);
if (ret != 0)
goto err_i2sv2;
return 0;
err_i2sv2:
clk_put(i2s->iis_cclk);
err:
return ret;
}
static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
{
snd_soc_unregister_dai(&pdev->dev);
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");
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