[deliverable/linux.git] / sound / soc / s3c24xx / s3c2412-i2s.c

/* sound/soc/s3c24xx/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/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <linux/kernel.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 <mach/hardware.h>

#include <mach/regs-gpio.h>
#include <mach/dma.h>

#include "s3c-dma.h"
#include "regs-i2s-v2.h"
#include "s3c2412-i2s.h"

#define S3C2412_I2S_DEBUG 0

static struct s3c2410_dma_client s3c2412_dma_client_out = {
	.name		= "I2S PCM Stereo out"
};

static struct s3c2410_dma_client s3c2412_dma_client_in = {
	.name		= "I2S PCM Stereo in"
};

static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
	.client		= &s3c2412_dma_client_out,
	.channel	= DMACH_I2S_OUT,
	.dma_addr	= S3C2410_PA_IIS + S3C2412_IISTXD,
	.dma_size	= 4,
};

static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
	.client		= &s3c2412_dma_client_in,
	.channel	= DMACH_I2S_IN,
	.dma_addr	= S3C2410_PA_IIS + S3C2412_IISRXD,
	.dma_size	= 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__);

	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 = clk_get(dai->dev, "i2sclk");
	if (s3c2412_i2s.iis_cclk == NULL) {
		pr_err("failed to get i2sclk clock\n");
		iounmap(s3c2412_i2s.regs);
		return -ENODEV;
	}

	/* Set MPLL as the source for IIS CLK */

	clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
	clk_enable(s3c2412_i2s.iis_cclk);

	s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;

	/* Configure the I2S pins in correct mode */
	s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
	s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
	s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
	s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
	s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);

	return 0;
}

static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
{
	clk_disable(s3c2412_i2s.iis_cclk);
	clk_put(s3c2412_i2s.iis_cclk);
	iounmap(s3c2412_i2s.regs);

	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);
	struct s3c_dma_params *dma_data;
	u32 iismod;

	pr_debug("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);
	pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		iismod |= S3C2412_IISMOD_8BIT;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		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 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 __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
{
	return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
}

static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
{
	snd_soc_unregister_dai(&pdev->dev);
	return 0;
}

static struct platform_driver s3c2412_iis_driver = {
	.probe  = s3c2412_iis_dev_probe,
	.remove = s3c2412_iis_dev_remove,
	.driver = {
		.name = "s3c2412-iis",
		.owner = THIS_MODULE,
	},
};

static int __init s3c2412_i2s_init(void)
{
	return platform_driver_register(&s3c2412_iis_driver);
}
module_init(s3c2412_i2s_init);

static void __exit s3c2412_i2s_exit(void)
{
	platform_driver_unregister(&s3c2412_iis_driver);
}
module_exit(s3c2412_i2s_exit);

/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
49646dfa BD	1	/* sound/soc/s3c24xx/s3c2412-i2s.c
	2	*
	3	* ALSA Soc Audio Layer - S3C2412 I2S driver
	4	*
	5	* Copyright (c) 2006 Wolfson Microelectronics PLC.
	6	* Graeme Gregory graeme.gregory@wolfsonmicro.com
	7	* linux@wolfsonmicro.com
	8	*
	9	* Copyright (c) 2007, 2004-2005 Simtec Electronics
	10	* http://armlinux.simtec.co.uk/
	11	* Ben Dooks <ben@simtec.co.uk>
	12	*
	13	* This program is free software; you can redistribute it and/or modify it
	14	* under the terms of the GNU General Public License as published by the
	15	* Free Software Foundation; either version 2 of the License, or (at your
	16	* option) any later version.
	17	*/
	18
	19	#include <linux/init.h>
	20	#include <linux/module.h>
	21	#include <linux/device.h>
	22	#include <linux/delay.h>
ec976d6e	23	#include <linux/gpio.h>
49646dfa BD	24	#include <linux/clk.h>
49646dfa BD	25	#include <linux/kernel.h>
8150bc88	26	#include <linux/io.h>
49646dfa BD	27
	28	#include <sound/core.h>
	29	#include <sound/pcm.h>
	30	#include <sound/pcm_params.h>
	31	#include <sound/initval.h>
	32	#include <sound/soc.h>
a09e64fb	33	#include <mach/hardware.h>
49646dfa	34
76fff368	35	#include <mach/regs-gpio.h>
a09e64fb	36	#include <mach/dma.h>
49646dfa	37
d3ff5a3e	38	#include "s3c-dma.h"
d07e7ce9	39	#include "regs-i2s-v2.h"
49646dfa BD	40	#include "s3c2412-i2s.h"
	41
	42	#define S3C2412_I2S_DEBUG 0
49646dfa	43
49646dfa BD	44	static struct s3c2410_dma_client s3c2412_dma_client_out = {
	45	.name = "I2S PCM Stereo out"
	46	};
	47
	48	static struct s3c2410_dma_client s3c2412_dma_client_in = {
	49	.name = "I2S PCM Stereo in"
	50	};
	51
faa31776	52	static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
49646dfa BD	53	.client = &s3c2412_dma_client_out,
	54	.channel = DMACH_I2S_OUT,
	55	.dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
	56	.dma_size = 4,
	57	};
	58
faa31776	59	static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
49646dfa BD	60	.client = &s3c2412_dma_client_in,
	61	.channel = DMACH_I2S_IN,
	62	.dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
	63	.dma_size = 4,
	64	};
	65
dc85447b	66	static struct s3c_i2sv2_info s3c2412_i2s;
49646dfa	67
f0fba2ad	68	static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
49646dfa	69	{
dc85447b	70	int ret;
49646dfa	71
ee7d4767	72	pr_debug("Entered %s\n", __func__);
49646dfa	73
f0fba2ad	74	ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
dc85447b BD	75	if (ret)
dc85447b BD	76	return ret;
49646dfa	77
dc85447b BD	78	s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
dc85447b BD	79	s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
49646dfa	80
f0fba2ad	81	s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
49646dfa	82	if (s3c2412_i2s.iis_cclk == NULL) {
008bec39	83	pr_err("failed to get i2sclk clock\n");
49646dfa BD	84	iounmap(s3c2412_i2s.regs);
	85	return -ENODEV;
	86	}
	87
dc85447b	88	/* Set MPLL as the source for IIS CLK */
49646dfa	89
dc85447b	90	clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
49646dfa BD	91	clk_enable(s3c2412_i2s.iis_cclk);
49646dfa BD	92
dc85447b	93	s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
49646dfa BD	94
	95	/* Configure the I2S pins in correct mode */
	96	s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
	97	s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
	98	s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
	99	s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
	100	s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
	101
6cab2d3d BD	102	return 0;
	103	}
	104
f0fba2ad LG	105	static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
	106	{
	107	clk_disable(s3c2412_i2s.iis_cclk);
	108	clk_put(s3c2412_i2s.iis_cclk);
	109	iounmap(s3c2412_i2s.regs);
	110
	111	return 0;
	112	}
	113
9c9b1257 JB	114	static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
	115	struct snd_pcm_hw_params *params,
	116	struct snd_soc_dai *cpu_dai)
	117	{
f0fba2ad	118	struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
fd23b7de	119	struct s3c_dma_params *dma_data;
9c9b1257 JB	120	u32 iismod;
	121
	122	pr_debug("Entered %s\n", __func__);
	123
	124	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
fd23b7de	125	dma_data = i2s->dma_playback;
9c9b1257	126	else
fd23b7de DM	127	dma_data = i2s->dma_capture;
	128
	129	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
9c9b1257 JB	130
	131	iismod = readl(i2s->regs + S3C2412_IISMOD);
	132	pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
	133
	134	switch (params_format(params)) {
	135	case SNDRV_PCM_FORMAT_S8:
	136	iismod \|= S3C2412_IISMOD_8BIT;
	137	break;
	138	case SNDRV_PCM_FORMAT_S16_LE:
	139	iismod &= ~S3C2412_IISMOD_8BIT;
	140	break;
	141	}
	142
	143	writel(iismod, i2s->regs + S3C2412_IISMOD);
	144	pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
	145
	146	return 0;
	147	}
	148
49646dfa BD	149	#define S3C2412_I2S_RATES \
	150	(SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| SNDRV_PCM_RATE_16000 \| \
	151	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	152	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	153
6335d055	154	static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
9c9b1257	155	.hw_params = s3c2412_i2s_hw_params,
6335d055 EM	156	};
6335d055 EM	157
f0fba2ad	158	static struct snd_soc_dai_driver s3c2412_i2s_dai = {
dc85447b	159	.probe = s3c2412_i2s_probe,
f0fba2ad	160	.remove = s3c2412_i2s_remove,
49646dfa BD	161	.playback = {
	162	.channels_min = 2,
	163	.channels_max = 2,
	164	.rates = S3C2412_I2S_RATES,
	165	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	166	},
	167	.capture = {
	168	.channels_min = 2,
	169	.channels_max = 2,
	170	.rates = S3C2412_I2S_RATES,
	171	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	172	},
6335d055	173	.ops = &s3c2412_i2s_dai_ops,
49646dfa	174	};
f0fba2ad LG	175
	176	static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
	177	{
	178	return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
	179	}
	180
	181	static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
	182	{
	183	snd_soc_unregister_dai(&pdev->dev);
	184	return 0;
	185	}
	186
	187	static struct platform_driver s3c2412_iis_driver = {
	188	.probe = s3c2412_iis_dev_probe,
	189	.remove = s3c2412_iis_dev_remove,
	190	.driver = {
	191	.name = "s3c2412-iis",
	192	.owner = THIS_MODULE,
	193	},
	194	};
49646dfa	195
c9b3a40f	196	static int __init s3c2412_i2s_init(void)
3f4b783c	197	{
f0fba2ad	198	return platform_driver_register(&s3c2412_iis_driver);
3f4b783c MB	199	}
	200	module_init(s3c2412_i2s_init);
	201
	202	static void __exit s3c2412_i2s_exit(void)
	203	{
f0fba2ad	204	platform_driver_unregister(&s3c2412_iis_driver);
3f4b783c MB	205	}
	206	module_exit(s3c2412_i2s_exit);
	207
49646dfa BD	208	/* Module information */
	209	MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
	210	MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
	211	MODULE_LICENSE("GPL");