[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 <linux/module.h>

#include <sound/soc.h>
#include <sound/pcm_params.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 (IS_ERR(s3c2412_i2s.iis_cclk)) {
		pr_err("failed to get i2sclk clock\n");
		iounmap(s3c2412_i2s.regs);
		return PTR_ERR(s3c2412_i2s.iis_cclk);
	}

	/* 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 (GPE0...GPE4) in correct mode */
	s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
			      S3C_GPIO_PULL_NONE);

	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 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 __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
{
	return s3c_i2sv2_register_dai(&pdev->dev, -1, &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 = __devexit_p(s3c2412_iis_dev_remove),
	.driver = {
		.name = "s3c2412-iis",
		.owner = THIS_MODULE,
	},
};

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");
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>
da155d5b	23	#include <linux/module.h>
49646dfa	24
49646dfa	25	#include <sound/soc.h>
0378b6ac	26	#include <sound/pcm_params.h>
49646dfa	27
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");
7803e329	72	if (IS_ERR(s3c2412_i2s.iis_cclk)) {
008bec39	73	pr_err("failed to get i2sclk clock\n");
49646dfa	74	iounmap(s3c2412_i2s.regs);
7803e329	75	return PTR_ERR(s3c2412_i2s.iis_cclk);
49646dfa BD	76	}
49646dfa BD	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	84
601787c2 SN	85	/* Configure the I2S pins (GPE0...GPE4) in correct mode */
	86	s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
	87	S3C_GPIO_PULL_NONE);
49646dfa	88
6cab2d3d BD	89	return 0;
	90	}
	91
f0fba2ad LG	92	static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
	93	{
	94	clk_disable(s3c2412_i2s.iis_cclk);
	95	clk_put(s3c2412_i2s.iis_cclk);
	96	iounmap(s3c2412_i2s.regs);
	97
	98	return 0;
	99	}
	100
9c9b1257 JB	101	static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
	102	struct snd_pcm_hw_params *params,
	103	struct snd_soc_dai *cpu_dai)
	104	{
f0fba2ad	105	struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
fd23b7de	106	struct s3c_dma_params *dma_data;
9c9b1257 JB	107	u32 iismod;
	108
	109	pr_debug("Entered %s\n", __func__);
	110
	111	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
fd23b7de	112	dma_data = i2s->dma_playback;
9c9b1257	113	else
fd23b7de DM	114	dma_data = i2s->dma_capture;
	115
	116	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
9c9b1257 JB	117
	118	iismod = readl(i2s->regs + S3C2412_IISMOD);
	119	pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
	120
	121	switch (params_format(params)) {
	122	case SNDRV_PCM_FORMAT_S8:
	123	iismod \|= S3C2412_IISMOD_8BIT;
	124	break;
	125	case SNDRV_PCM_FORMAT_S16_LE:
	126	iismod &= ~S3C2412_IISMOD_8BIT;
	127	break;
	128	}
	129
	130	writel(iismod, i2s->regs + S3C2412_IISMOD);
	131	pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
	132
	133	return 0;
	134	}
	135
49646dfa BD	136	#define S3C2412_I2S_RATES \
	137	(SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| SNDRV_PCM_RATE_16000 \| \
	138	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	139	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	140
85e7652d	141	static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
9c9b1257	142	.hw_params = s3c2412_i2s_hw_params,
6335d055 EM	143	};
6335d055 EM	144
f0fba2ad	145	static struct snd_soc_dai_driver s3c2412_i2s_dai = {
dc85447b	146	.probe = s3c2412_i2s_probe,
f0fba2ad	147	.remove = s3c2412_i2s_remove,
49646dfa BD	148	.playback = {
	149	.channels_min = 2,
	150	.channels_max = 2,
	151	.rates = S3C2412_I2S_RATES,
	152	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	153	},
	154	.capture = {
	155	.channels_min = 2,
	156	.channels_max = 2,
	157	.rates = S3C2412_I2S_RATES,
	158	.formats = SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE,
	159	},
6335d055	160	.ops = &s3c2412_i2s_dai_ops,
49646dfa	161	};
f0fba2ad LG	162
	163	static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
	164	{
06412088	165	return s3c_i2sv2_register_dai(&pdev->dev, -1, &s3c2412_i2s_dai);
f0fba2ad LG	166	}
	167
	168	static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
	169	{
	170	snd_soc_unregister_dai(&pdev->dev);
	171	return 0;
	172	}
	173
	174	static struct platform_driver s3c2412_iis_driver = {
	175	.probe = s3c2412_iis_dev_probe,
c4c5839f	176	.remove = __devexit_p(s3c2412_iis_dev_remove),
f0fba2ad LG	177	.driver = {
	178	.name = "s3c2412-iis",
	179	.owner = THIS_MODULE,
	180	},
	181	};
49646dfa	182
e00c3f55	183	module_platform_driver(s3c2412_iis_driver);
3f4b783c	184
49646dfa BD	185	/* Module information */
	186	MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
	187	MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
	188	MODULE_LICENSE("GPL");
960d0697	189	MODULE_ALIAS("platform:s3c2412-iis");