[mirror_ubuntu-jammy-kernel.git] / sound / soc / s3c24xx / s3c64xx-i2s.c

/* 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/clk.h>
#include <linux/gpio.h>
#include <linux/io.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 <mach/map.h>
#include <mach/dma.h>

#include "s3c-dma.h"
#include "s3c64xx-i2s.h"

/* The value should be set to maximum of the total number
 * of I2Sv3 controllers that any supported SoC has.
 */
#define MAX_I2SV3	2

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 s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];

struct snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3];
EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);

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;

	case S3C64XX_CLKSRC_CDCLK:
		switch (dir) {
		case SND_SOC_CLOCK_IN:
			iismod |= S3C64XX_IISMOD_CDCLKCON;
			break;
		case SND_SOC_CLOCK_OUT:
			iismod &= ~S3C64XX_IISMOD_CDCLKCON;
			break;
		default:
			return -EINVAL;
		}
		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);
	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);

	if (iismod & S3C64XX_IISMOD_IMS_SYSMUX)
		return i2s->iis_cclk;
	else
		return i2s->iis_pclk;
}
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,	
};

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 >= MAX_I2SV3) {
		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;
	dai->name = "s3c64xx-i2s";
	dai->id = pdev->id;
	dai->symmetric_rates = 1;
	dai->playback.channels_min = 2;
	dai->playback.channels_max = 2;
	dai->playback.rates = S3C64XX_I2S_RATES;
	dai->playback.formats = S3C64XX_I2S_FMTS;
	dai->capture.channels_min = 2;
	dai->capture.channels_max = 2;
	dai->capture.rates = S3C64XX_I2S_RATES;
	dai->capture.formats = S3C64XX_I2S_FMTS;
	dai->probe = s3c64xx_i2s_probe;
	dai->ops = &s3c64xx_i2s_dai_ops;

	i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
	i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];

	if (pdev->id == 0) {
		i2s->dma_capture->channel = DMACH_I2S0_IN;
		i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD;
		i2s->dma_playback->channel = DMACH_I2S0_OUT;
		i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD;
	} else {
		i2s->dma_capture->channel = DMACH_I2S1_IN;
		i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD;
		i2s->dma_playback->channel = DMACH_I2S1_OUT;
		i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD;
	}

	i2s->dma_capture->client = &s3c64xx_dma_client_in;
	i2s->dma_capture->dma_size = 4;
	i2s->dma_playback->client = &s3c64xx_dma_client_out;
	i2s->dma_playback->dma_size = 4;

	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;
	}

	clk_enable(i2s->iis_cclk);

	ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
	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");
Commit	Line	Data
f8cf8176 BD	1	/* sound/soc/s3c24xx/s3c64xx-i2s.c
	2	*
	3	* ALSA SoC Audio Layer - S3C64XX I2S driver
	4	*
	5	* Copyright 2008 Openmoko, Inc.
	6	* Copyright 2008 Simtec Electronics
	7	* Ben Dooks <ben@simtec.co.uk>
	8	* http://armlinux.simtec.co.uk/
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
f8cf8176	15	#include <linux/clk.h>
f8cf8176 BD	16	#include <linux/gpio.h>
	17	#include <linux/io.h>
	18
f8cf8176 BD	19	#include <sound/soc.h>
	20
	21	#include <plat/regs-s3c2412-iis.h>
	22	#include <plat/gpio-bank-d.h>
	23	#include <plat/gpio-bank-e.h>
	24	#include <plat/gpio-cfg.h>
f8cf8176 BD	25
	26	#include <mach/map.h>
	27	#include <mach/dma.h>
	28
d3ff5a3e	29	#include "s3c-dma.h"
f8cf8176 BD	30	#include "s3c64xx-i2s.h"
f8cf8176 BD	31
0fe69229 JB	32	/* The value should be set to maximum of the total number
	33	* of I2Sv3 controllers that any supported SoC has.
	34	*/
	35	#define MAX_I2SV3 2
	36
f8cf8176 BD	37	static struct s3c2410_dma_client s3c64xx_dma_client_out = {
	38	.name = "I2S PCM Stereo out"
	39	};
	40
	41	static struct s3c2410_dma_client s3c64xx_dma_client_in = {
	42	.name = "I2S PCM Stereo in"
	43	};
	44
0fe69229 JB	45	static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
	46	static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
	47	static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];
f8cf8176	48
0fe69229 JB	49	struct snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3];
0fe69229 JB	50	EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
f8cf8176 BD	51
	52	static inline struct s3c_i2sv2_info to_info(struct snd_soc_dai cpu_dai)
	53	{
	54	return cpu_dai->private_data;
	55	}
	56
	57	static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
	58	int clk_id, unsigned int freq, int dir)
	59	{
	60	struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
	61	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
	62
	63	switch (clk_id) {
	64	case S3C64XX_CLKSRC_PCLK:
	65	iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
	66	break;
	67
	68	case S3C64XX_CLKSRC_MUX:
	69	iismod \|= S3C64XX_IISMOD_IMS_SYSMUX;
	70	break;
	71
8bb01489 MB	72	case S3C64XX_CLKSRC_CDCLK:
	73	switch (dir) {
	74	case SND_SOC_CLOCK_IN:
	75	iismod \|= S3C64XX_IISMOD_CDCLKCON;
	76	break;
	77	case SND_SOC_CLOCK_OUT:
	78	iismod &= ~S3C64XX_IISMOD_CDCLKCON;
	79	break;
	80	default:
	81	return -EINVAL;
	82	}
	83	break;
	84
f8cf8176 BD	85	default:
	86	return -EINVAL;
	87	}
	88
	89	writel(iismod, i2s->regs + S3C2412_IISMOD);
	90
	91	return 0;
	92	}
	93
51438449	94	struct clk s3c64xx_i2s_get_clock(struct snd_soc_dai dai)
f8cf8176 BD	95	{
f8cf8176 BD	96	struct s3c_i2sv2_info *i2s = to_info(dai);
b1cd6b9e	97	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
f8cf8176	98
b1cd6b9e J	99	if (iismod & S3C64XX_IISMOD_IMS_SYSMUX)
	100	return i2s->iis_cclk;
	101	else
	102	return i2s->iis_pclk;
f8cf8176	103	}
51438449	104	EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock);
f8cf8176 BD	105
	106	static int s3c64xx_i2s_probe(struct platform_device *pdev,
	107	struct snd_soc_dai *dai)
	108	{
f8cf8176	109	/* configure GPIO for i2s port */
172fd9e2	110	switch (dai->id) {
f8cf8176 BD	111	case 0:
	112	s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
	113	s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
	114	s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
	115	s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
	116	s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
	117	break;
	118	case 1:
	119	s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
	120	s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
	121	s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
	122	s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
	123	s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
	124	}
	125
	126	return 0;
	127	}
	128
	129
	130	#define S3C64XX_I2S_RATES \
	131	(SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| SNDRV_PCM_RATE_16000 \| \
	132	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	133	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	134
	135	#define S3C64XX_I2S_FMTS \
553b1dd5 MB	136	(SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE \|\
553b1dd5 MB	137	SNDRV_PCM_FMTBIT_S24_LE)
f8cf8176	138
f2a5d6a2 MB	139	static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
	140	.set_sysclk = s3c64xx_i2s_set_sysclk,
	141	};
	142
172fd9e2 MB	143	static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
	144	{
	145	struct s3c_i2sv2_info *i2s;
	146	struct snd_soc_dai *dai;
	147	int ret;
	148
0fe69229	149	if (pdev->id >= MAX_I2SV3) {
172fd9e2 MB	150	dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
	151	return -EINVAL;
	152	}
	153
	154	i2s = &s3c64xx_i2s[pdev->id];
	155	dai = &s3c64xx_i2s_dai[pdev->id];
	156	dai->dev = &pdev->dev;
0fe69229 JB	157	dai->name = "s3c64xx-i2s";
	158	dai->id = pdev->id;
	159	dai->symmetric_rates = 1;
	160	dai->playback.channels_min = 2;
	161	dai->playback.channels_max = 2;
	162	dai->playback.rates = S3C64XX_I2S_RATES;
	163	dai->playback.formats = S3C64XX_I2S_FMTS;
	164	dai->capture.channels_min = 2;
	165	dai->capture.channels_max = 2;
	166	dai->capture.rates = S3C64XX_I2S_RATES;
	167	dai->capture.formats = S3C64XX_I2S_FMTS;
	168	dai->probe = s3c64xx_i2s_probe;
	169	dai->ops = &s3c64xx_i2s_dai_ops;
172fd9e2 MB	170
	171	i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
	172	i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
	173
0fe69229 JB	174	if (pdev->id == 0) {
	175	i2s->dma_capture->channel = DMACH_I2S0_IN;
	176	i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD;
	177	i2s->dma_playback->channel = DMACH_I2S0_OUT;
	178	i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD;
	179	} else {
	180	i2s->dma_capture->channel = DMACH_I2S1_IN;
	181	i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD;
	182	i2s->dma_playback->channel = DMACH_I2S1_OUT;
	183	i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD;
	184	}
	185
	186	i2s->dma_capture->client = &s3c64xx_dma_client_in;
	187	i2s->dma_capture->dma_size = 4;
	188	i2s->dma_playback->client = &s3c64xx_dma_client_out;
	189	i2s->dma_playback->dma_size = 4;
	190
172fd9e2 MB	191	i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
172fd9e2 MB	192	if (IS_ERR(i2s->iis_cclk)) {
09aa60df	193	dev_err(&pdev->dev, "failed to get audio-bus\n");
172fd9e2 MB	194	ret = PTR_ERR(i2s->iis_cclk);
	195	goto err;
	196	}
	197
6fc786d5 JB	198	clk_enable(i2s->iis_cclk);
6fc786d5 JB	199
71437552	200	ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
172fd9e2 MB	201	if (ret)
	202	goto err_clk;
	203
a7be4d92	204	ret = s3c_i2sv2_register_dai(dai);
172fd9e2 MB	205	if (ret != 0)
	206	goto err_i2sv2;
	207
	208	return 0;
	209
	210	err_i2sv2:
	211	/* Not implemented for I2Sv2 core yet */
	212	err_clk:
	213	clk_put(i2s->iis_cclk);
	214	err:
	215	return ret;
	216	}
	217
	218	static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
	219	{
	220	dev_err(&pdev->dev, "Device removal not yet supported\n");
	221	return 0;
	222	}
	223
	224	static struct platform_driver s3c64xx_iis_driver = {
	225	.probe = s3c64xx_iis_dev_probe,
	226	.remove = s3c64xx_iis_dev_remove,
	227	.driver = {
	228	.name = "s3c64xx-iis",
	229	.owner = THIS_MODULE,
	230	},
	231	};
	232
f8cf8176 BD	233	static int __init s3c64xx_i2s_init(void)
f8cf8176 BD	234	{
172fd9e2	235	return platform_driver_register(&s3c64xx_iis_driver);
f8cf8176 BD	236	}
	237	module_init(s3c64xx_i2s_init);
	238
	239	static void __exit s3c64xx_i2s_exit(void)
	240	{
172fd9e2	241	platform_driver_unregister(&s3c64xx_iis_driver);
f8cf8176 BD	242	}
	243	module_exit(s3c64xx_i2s_exit);
	244
	245	/* Module information */
	246	MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
	247	MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
	248	MODULE_LICENSE("GPL");