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/* sound/soc/samsung/s3c2412-i2s.c
*
* ALSA Soc Audio Layer - S3C2412 I2S driver
*
* Copyright (c) 2006 Wolfson Microelectronics PLC.
* Graeme Gregory graeme.gregory@wolfsonmicro.com
* linux@wolfsonmicro.com
*
* Copyright (c) 2007, 2004-2005 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@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 as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <mach/gpio-samsung.h>
#include <plat/gpio-cfg.h>
#include "dma.h"
#include "regs-i2s-v2.h"
#include "s3c2412-i2s.h"
#include <linux/platform_data/asoc-s3c.h>
static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
.chan_name = "tx",
.addr_width = 4,
};
static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
.chan_name = "rx",
.addr_width = 4,
};
static struct s3c_i2sv2_info s3c2412_i2s;
static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
{
int ret;
pr_debug("Entered %s\n", __func__);
snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
&s3c2412_i2s_pcm_stereo_in);
ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
if (ret)
return ret;
s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk");
if (IS_ERR(s3c2412_i2s.iis_cclk)) {
pr_err("failed to get i2sclk clock\n");
ret = PTR_ERR(s3c2412_i2s.iis_cclk);
goto err;
}
/* Set MPLL as the source for IIS CLK */
clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
ret = clk_prepare_enable(s3c2412_i2s.iis_cclk);
if (ret)
goto err;
/* Configure the I2S pins (GPE0...GPE4) in correct mode */
s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
S3C_GPIO_PULL_NONE);
return 0;
err:
s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
return ret;
}
static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
{
clk_disable_unprepare(s3c2412_i2s.iis_cclk);
s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
return 0;
}
static int s3c2412_i2s_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);
u32 iismod;
pr_debug("Entered %s\n", __func__);
iismod = readl(i2s->regs + S3C2412_IISMOD);
pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
switch (params_width(params)) {
case 8:
iismod |= S3C2412_IISMOD_8BIT;
break;
case 16:
iismod &= ~S3C2412_IISMOD_8BIT;
break;
}
writel(iismod, i2s->regs + S3C2412_IISMOD);
pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
return 0;
}
#define S3C2412_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)
static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
.hw_params = s3c2412_i2s_hw_params,
};
static struct snd_soc_dai_driver s3c2412_i2s_dai = {
.probe = s3c2412_i2s_probe,
.remove = s3c2412_i2s_remove,
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C2412_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C2412_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &s3c2412_i2s_dai_ops,
};
static const struct snd_soc_component_driver s3c2412_i2s_component = {
.name = "s3c2412-i2s",
};
static int s3c2412_iis_dev_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "missing platform data");
return -ENXIO;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(s3c2412_i2s.regs))
return PTR_ERR(s3c2412_i2s.regs);
s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
ret = samsung_asoc_dma_platform_register(&pdev->dev,
pdata->dma_filter,
NULL, NULL);
if (ret) {
pr_err("failed to register the DMA: %d\n", ret);
return ret;
}
ret = s3c_i2sv2_register_component(&pdev->dev, -1,
&s3c2412_i2s_component,
&s3c2412_i2s_dai);
if (ret)
pr_err("failed to register the dai\n");
return ret;
}
static struct platform_driver s3c2412_iis_driver = {
.probe = s3c2412_iis_dev_probe,
.driver = {
.name = "s3c2412-iis",
},
};
module_platform_driver(s3c2412_iis_driver);
/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c2412-iis");
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