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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/clk.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <sound/soc.h>
#include <plat/regs-s3c2412-iis.h>
#include <plat/gpio-bank-d.h>
#include <plat/gpio-bank-e.h>
#include <plat/gpio-cfg.h>
#include <mach/map.h>
#include <mach/dma.h>
#include "s3c-dma.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 snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3];
EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
{
return cpu_dai->private_data;
}
static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
switch (clk_id) {
case S3C64XX_CLKSRC_PCLK:
iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
break;
case S3C64XX_CLKSRC_MUX:
iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
break;
case S3C64XX_CLKSRC_CDCLK:
switch (dir) {
case SND_SOC_CLOCK_IN:
iismod |= S3C64XX_IISMOD_CDCLKCON;
break;
case SND_SOC_CLOCK_OUT:
iismod &= ~S3C64XX_IISMOD_CDCLKCON;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
writel(iismod, i2s->regs + S3C2412_IISMOD);
return 0;
}
struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai)
{
struct s3c_i2sv2_info *i2s = to_info(dai);
u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
if (iismod & S3C64XX_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 platform_device *pdev,
struct snd_soc_dai *dai)
{
/* configure GPIO for i2s port */
switch (dai->id) {
case 0:
s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
break;
case 1:
s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
}
return 0;
}
static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
.set_sysclk = s3c64xx_i2s_set_sysclk,
};
static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
{
struct s3c_i2sv2_info *i2s;
struct snd_soc_dai *dai;
int 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];
dai = &s3c64xx_i2s_dai[pdev->id];
dai->dev = &pdev->dev;
dai->name = "s3c64xx-i2s";
dai->id = pdev->id;
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_i2s_probe;
dai->ops = &s3c64xx_i2s_dai_ops;
i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
if (pdev->id == 0) {
i2s->dma_capture->channel = DMACH_I2S0_IN;
i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD;
i2s->dma_playback->channel = DMACH_I2S0_OUT;
i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD;
} else {
i2s->dma_capture->channel = DMACH_I2S1_IN;
i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD;
i2s->dma_playback->channel = DMACH_I2S1_OUT;
i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + 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_iis_dev_remove(struct platform_device *pdev)
{
dev_err(&pdev->dev, "Device removal not yet supported\n");
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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