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kernel-fxtec-pro1x/sound/soc/s3c24xx/s3c64xx-i2s.c
Mark Brown 553b1dd58c ASoC: Fix data format configuration for S3C64xx IISv2 and add 24 bit 
The data format configuration for S3C64xx IISv2 is completely different
to that for S3C24xx. Instead of a single bit configuration in bit 0 of
IISMOD we have format selection in bits 13 and 14 and bit clock rate
selection in bits 1 and 2. While we're here add support for 24 bit
samples in S3C64xx.

At some point it may be desirable to expose the bit clock rate selection
to users but given the limited configuration options that may not be
required.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-04-30 13:26:34 +01:00

272 lines
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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/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.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 <plat/audio.h>
#include <mach/map.h>
#include <mach/dma.h>
#include "s3c24xx-pcm.h"
#include "s3c64xx-i2s.h"
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 s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
[0] = {
.channel = DMACH_I2S0_OUT,
.client = &s3c64xx_dma_client_out,
.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
.dma_size = 4,
},
[1] = {
.channel = DMACH_I2S1_OUT,
.client = &s3c64xx_dma_client_out,
.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
.dma_size = 4,
},
};
static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
[0] = {
.channel = DMACH_I2S0_IN,
.client = &s3c64xx_dma_client_in,
.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
.dma_size = 4,
},
[1] = {
.channel = DMACH_I2S1_IN,
.client = &s3c64xx_dma_client_in,
.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
.dma_size = 4,
},
};
static struct s3c_i2sv2_info s3c64xx_i2s[2];
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;
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);
return i2s->iis_cclk;
}
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;
}
#define S3C64XX_I2S_RATES \
(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define S3C64XX_I2S_FMTS \
(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
.set_sysclk = s3c64xx_i2s_set_sysclk,
};
struct snd_soc_dai s3c64xx_i2s_dai[] = {
{
.name = "s3c64xx-i2s",
.id = 0,
.probe = s3c64xx_i2s_probe,
.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",
.id = 1,
.probe = s3c64xx_i2s_probe,
.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,
},
};
EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
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 >= ARRAY_SIZE(s3c64xx_i2s)) {
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;
i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
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;
}
ret = s3c_i2sv2_probe(pdev, dai, i2s,
dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
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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