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