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

/* 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 <sound/soc.h>
#include <sound/pcm_params.h>

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

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

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");
MODULE_ALIAS("platform:s3c2412-iis");
Commit	Line	Data
5033f43c	1	/* sound/soc/samsung/s3c2412-i2s.c
49646dfa BD	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
49646dfa	19	#include <linux/delay.h>
ec976d6e	20	#include <linux/gpio.h>
49646dfa	21	#include <linux/clk.h>
8150bc88	22	#include <linux/io.h>
49646dfa	23
49646dfa	24	#include <sound/soc.h>
0378b6ac	25	#include <sound/pcm_params.h>
49646dfa	26
76fff368	27	#include <mach/regs-gpio.h>
a09e64fb	28	#include <mach/dma.h>
49646dfa	29
4b640cf3	30	#include "dma.h"
d07e7ce9	31	#include "regs-i2s-v2.h"
49646dfa BD	32	#include "s3c2412-i2s.h"
49646dfa BD	33
49646dfa BD	34	static struct s3c2410_dma_client s3c2412_dma_client_out = {
	35	.name = "I2S PCM Stereo out"
	36	};
	37
	38	static struct s3c2410_dma_client s3c2412_dma_client_in = {
	39	.name = "I2S PCM Stereo in"
	40	};
	41
faa31776	42	static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
49646dfa BD	43	.client = &s3c2412_dma_client_out,
	44	.channel = DMACH_I2S_OUT,
	45	.dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
	46	.dma_size = 4,
	47	};
	48
faa31776	49	static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
49646dfa BD	50	.client = &s3c2412_dma_client_in,
	51	.channel = DMACH_I2S_IN,
	52	.dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
	53	.dma_size = 4,
	54	};
	55
dc85447b	56	static struct s3c_i2sv2_info s3c2412_i2s;
49646dfa	57
f0fba2ad	58	static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
49646dfa	59	{
dc85447b	60	int ret;
49646dfa	61
ee7d4767	62	pr_debug("Entered %s\n", __func__);
49646dfa	63
f0fba2ad	64	ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
dc85447b BD	65	if (ret)
dc85447b BD	66	return ret;
49646dfa	67
dc85447b BD	68	s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
dc85447b BD	69	s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
49646dfa	70
f0fba2ad	71	s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
49646dfa	72	if (s3c2412_i2s.iis_cclk == NULL) {
008bec39	73	pr_err("failed to get i2sclk clock\n");
49646dfa BD	74	iounmap(s3c2412_i2s.regs);
	75	return -ENODEV;
	76	}
	77
dc85447b	78	/* Set MPLL as the source for IIS CLK */
49646dfa	79
dc85447b	80	clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
49646dfa BD	81	clk_enable(s3c2412_i2s.iis_cclk);
49646dfa BD	82
dc85447b	83	s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
49646dfa BD	84
	85	/* Configure the I2S pins in correct mode */
	86	s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
	87	s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
	88	s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
	89	s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
	90	s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
	91
6cab2d3d BD	92	return 0;
	93	}
	94
f0fba2ad LG	95	static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
	96	{
	97	clk_disable(s3c2412_i2s.iis_cclk);
	98	clk_put(s3c2412_i2s.iis_cclk);
	99	iounmap(s3c2412_i2s.regs);
	100
	101	return 0;
	102	}
	103
9c9b1257 JB	104	static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
	105	struct snd_pcm_hw_params *params,
	106	struct snd_soc_dai *cpu_dai)
	107	{
f0fba2ad	108	struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
fd23b7de	109	struct s3c_dma_params *dma_data;
9c9b1257 JB	110	u32 iismod;
	111
	112	pr_debug("Entered %s\n", __func__);
	113
	114	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
fd23b7de	115	dma_data = i2s->dma_playback;
9c9b1257	116	else
fd23b7de DM	117	dma_data = i2s->dma_capture;
	118
	119	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
9c9b1257 JB	120
	121	iismod = readl(i2s->regs + S3C2412_IISMOD);
	122	pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
	123
	124	switch (params_format(params)) {
	125	case SNDRV_PCM_FORMAT_S8:
	126	iismod \|= S3C2412_IISMOD_8BIT;
	127	break;
	128	case SNDRV_PCM_FORMAT_S16_LE:
	129	iismod &= ~S3C2412_IISMOD_8BIT;
	130	break;
	131	}
	132
	133	writel(iismod, i2s->regs + S3C2412_IISMOD);
	134	pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
	135
	136	return 0;
	137	}
	138
49646dfa BD	139	#define S3C2412_I2S_RATES \
	140	(SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| SNDRV_PCM_RATE_16000 \| \
	141	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	142	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	143
6335d055	144	static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
9c9b1257	145	.hw_params = s3c2412_i2s_hw_params,
6335d055 EM	146	};
6335d055 EM	147
f0fba2ad	148	static struct snd_soc_dai_driver s3c2412_i2s_dai = {
dc85447b	149	.probe = s3c2412_i2s_probe,
f0fba2ad	150	.remove = s3c2412_i2s_remove,
49646dfa BD	151	.playback = {
	152	.channels_min = 2,
	153	.channels_max = 2,
	154	.rates = S3C2412_I2S_RATES,
	155	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	156	},
	157	.capture = {
	158	.channels_min = 2,
	159	.channels_max = 2,
	160	.rates = S3C2412_I2S_RATES,
	161	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	162	},
6335d055	163	.ops = &s3c2412_i2s_dai_ops,
49646dfa	164	};
f0fba2ad LG	165
	166	static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
	167	{
	168	return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
	169	}
	170
	171	static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
	172	{
	173	snd_soc_unregister_dai(&pdev->dev);
	174	return 0;
	175	}
	176
	177	static struct platform_driver s3c2412_iis_driver = {
	178	.probe = s3c2412_iis_dev_probe,
	179	.remove = s3c2412_iis_dev_remove,
	180	.driver = {
	181	.name = "s3c2412-iis",
	182	.owner = THIS_MODULE,
	183	},
	184	};
49646dfa	185
c9b3a40f	186	static int __init s3c2412_i2s_init(void)
3f4b783c	187	{
f0fba2ad	188	return platform_driver_register(&s3c2412_iis_driver);
3f4b783c MB	189	}
	190	module_init(s3c2412_i2s_init);
	191
	192	static void __exit s3c2412_i2s_exit(void)
	193	{
f0fba2ad	194	platform_driver_unregister(&s3c2412_iis_driver);
3f4b783c MB	195	}
	196	module_exit(s3c2412_i2s_exit);
	197
49646dfa BD	198	/* Module information */
	199	MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
	200	MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
	201	MODULE_LICENSE("GPL");
960d0697	202	MODULE_ALIAS("platform:s3c2412-iis");