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/* sound/soc/s3c24xx/s3c64xx-i2s.c
*
* ALSA SoC Audio Layer - S3C64XX I2S driver
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* 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/clk.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <sound/soc.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"
/* The value should be set to maximum of the total number
* of I2Sv3 controllers that any supported SoC has.
*/
#define MAX_I2SV3 2
static struct s3c2410_dma_client s3c64xx_dma_client_out = {
.name = "I2S PCM Stereo out"
};
static struct s3c2410_dma_client s3c64xx_dma_client_in = {
.name = "I2S PCM Stereo in"
};
static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];
struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai)
{
struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai);
u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
if (iismod & S3C2412_IISMOD_IMS_SYSMUX)
return i2s->iis_cclk;
else
return i2s->iis_pclk;
}
EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock);
static int s3c64xx_i2s_probe(struct snd_soc_dai *dai)
{
struct s3c_i2sv2_info *i2s;
int ret;
if (dai->id >= MAX_I2SV3) {
dev_err(dai->dev, "id %d out of range\n", dai->id);
return -EINVAL;
}
i2s = &s3c64xx_i2s[dai->id];
snd_soc_dai_set_drvdata(dai, i2s);
i2s->iis_cclk = clk_get(dai->dev, "audio-bus");
if (IS_ERR(i2s->iis_cclk)) {
dev_err(dai->dev, "failed to get audio-bus\n");
ret = PTR_ERR(i2s->iis_cclk);
goto err;
}
clk_enable(i2s->iis_cclk);
ret = s3c_i2sv2_probe(dai, i2s, i2s->base);
if (ret)
goto err_clk;
return 0;
err_clk:
clk_disable(i2s->iis_cclk);
clk_put(i2s->iis_cclk);
err:
kfree(i2s);
return ret;
}
static int s3c64xx_i2s_remove(struct snd_soc_dai *dai)
{
struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai);
clk_disable(i2s->iis_cclk);
clk_put(i2s->iis_cclk);
kfree(i2s);
return 0;
}
static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops;
static struct snd_soc_dai_driver s3c64xx_i2s_dai[MAX_I2SV3] = {
{
.name = "s3c64xx-i2s-0",
.probe = s3c64xx_i2s_probe,
.remove = s3c64xx_i2s_remove,
.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,},
.ops = &s3c64xx_i2s_dai_ops,
.symmetric_rates = 1,
}, {
.name = "s3c64xx-i2s-1",
.probe = s3c64xx_i2s_probe,
.remove = s3c64xx_i2s_remove,
.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,},
.ops = &s3c64xx_i2s_dai_ops,
.symmetric_rates = 1,
},};
static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
{
struct s3c_audio_pdata *i2s_pdata;
struct s3c_i2sv2_info *i2s;
struct resource *res;
int i, ret;
if (pdev->id >= MAX_I2SV3) {
dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
return -EINVAL;
}
i2s = &s3c64xx_i2s[pdev->id];
i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
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")) {
dev_err(&pdev->dev, "Unable to request SFR region\n");
return -EBUSY;
}
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->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;
for (i = 0; i < ARRAY_SIZE(s3c64xx_i2s_dai); i++) {
ret = s3c_i2sv2_register_dai(&pdev->dev, i,
&s3c64xx_i2s_dai[i]);
if (ret != 0)
return ret;
}
return 0;
}
static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
{
snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(s3c64xx_i2s_dai));
return 0;
}
static struct platform_driver s3c64xx_iis_driver = {
.probe = s3c64xx_iis_dev_probe,
.remove = s3c64xx_iis_dev_remove,
.driver = {
.name = "s3c64xx-iis",
.owner = THIS_MODULE,
},
};
static int __init s3c64xx_i2s_init(void)
{
return platform_driver_register(&s3c64xx_iis_driver);
}
module_init(s3c64xx_i2s_init);
static void __exit s3c64xx_i2s_exit(void)
{
platform_driver_unregister(&s3c64xx_iis_driver);
}
module_exit(s3c64xx_i2s_exit);
/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
MODULE_LICENSE("GPL");
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