[deliverable/linux.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/delay.h>
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/gpio.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 <plat/regs-s3c2412-iis.h>
#include <plat/gpio-bank-d.h>
#include <plat/gpio-bank-e.h>
#include <plat/gpio-cfg.h>
#include <plat/audio.h>

#include <mach/map.h>
#include <mach/dma.h>

#include "s3c24xx-pcm.h"
#include "s3c64xx-i2s.h"

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 s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
	[0] = {
		.channel	= DMACH_I2S0_OUT,
		.client		= &s3c64xx_dma_client_out,
		.dma_addr	= S3C64XX_PA_IIS0 + S3C2412_IISTXD,
		.dma_size	= 4,
	},
	[1] = {
		.channel	= DMACH_I2S1_OUT,
		.client		= &s3c64xx_dma_client_out,
		.dma_addr	= S3C64XX_PA_IIS1 + S3C2412_IISTXD,
		.dma_size	= 4,
	},
};

static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
	[0] = {
		.channel	= DMACH_I2S0_IN,
		.client		= &s3c64xx_dma_client_in,
		.dma_addr	= S3C64XX_PA_IIS0 + S3C2412_IISRXD,
		.dma_size	= 4,
	},
	[1] = {
		.channel	= DMACH_I2S1_IN,
		.client		= &s3c64xx_dma_client_in,
		.dma_addr	= S3C64XX_PA_IIS1 + S3C2412_IISRXD,
		.dma_size	= 4,
	},
};

static struct s3c_i2sv2_info s3c64xx_i2s[2];

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;

	default:
		return -EINVAL;
	}

	writel(iismod, i2s->regs + S3C2412_IISMOD);

	return 0;
}


unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai)
{
	struct s3c_i2sv2_info *i2s = to_info(dai);

	return clk_get_rate(i2s->iis_cclk);
}
EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate);

static int s3c64xx_i2s_probe(struct platform_device *pdev,
			     struct snd_soc_dai *dai)
{
	struct device *dev = &pdev->dev;
	struct s3c_i2sv2_info *i2s;
	int ret;

	dev_dbg(dev, "%s: probing dai %d\n", __func__, pdev->id);

	if (pdev->id < 0 || pdev->id > ARRAY_SIZE(s3c64xx_i2s)) {
		dev_err(dev, "id %d out of range\n", pdev->id);
		return -EINVAL;
	}

	i2s = &s3c64xx_i2s[pdev->id];

	ret = s3c_i2sv2_probe(pdev, dai, i2s,
			      pdev->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
	if (ret)
		return ret;

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

	i2s->iis_cclk = clk_get(dev, "audio-bus");
	if (IS_ERR(i2s->iis_cclk)) {
		dev_err(dev, "failed to get audio-bus");
		iounmap(i2s->regs);
		return -ENODEV;
	}

	/* configure GPIO for i2s port */
	switch (pdev->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)

static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
	.set_sysclk	= s3c64xx_i2s_set_sysclk,	
};

struct snd_soc_dai s3c64xx_i2s_dai = {
	.name		= "s3c64xx-i2s",
	.id		= 0,
	.probe		= s3c64xx_i2s_probe,
	.playback = {
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= S3C64XX_I2S_RATES,
		.formats	= S3C64XX_I2S_FMTS,
	},
	.capture = {
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= S3C64XX_I2S_RATES,
		.formats	= S3C64XX_I2S_FMTS,
	},
	.ops = &s3c64xx_i2s_dai_ops,
};
EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);

static int __init s3c64xx_i2s_init(void)
{
	return  s3c_i2sv2_register_dai(&s3c64xx_i2s_dai);
}
module_init(s3c64xx_i2s_init);

static void __exit s3c64xx_i2s_exit(void)
{
	snd_soc_unregister_dai(&s3c64xx_i2s_dai);
}
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>
	18	#include <linux/delay.h>
	19	#include <linux/clk.h>
	20	#include <linux/kernel.h>
	21	#include <linux/gpio.h>
	22	#include <linux/io.h>
	23
	24	#include <sound/core.h>
	25	#include <sound/pcm.h>
	26	#include <sound/pcm_params.h>
	27	#include <sound/initval.h>
	28	#include <sound/soc.h>
	29
	30	#include <plat/regs-s3c2412-iis.h>
	31	#include <plat/gpio-bank-d.h>
	32	#include <plat/gpio-bank-e.h>
	33	#include <plat/gpio-cfg.h>
	34	#include <plat/audio.h>
	35
	36	#include <mach/map.h>
	37	#include <mach/dma.h>
	38
	39	#include "s3c24xx-pcm.h"
	40	#include "s3c64xx-i2s.h"
	41
	42	static struct s3c2410_dma_client s3c64xx_dma_client_out = {
	43	.name = "I2S PCM Stereo out"
	44	};
	45
	46	static struct s3c2410_dma_client s3c64xx_dma_client_in = {
	47	.name = "I2S PCM Stereo in"
	48	};
	49
	50	static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
	51	[0] = {
	52	.channel = DMACH_I2S0_OUT,
	53	.client = &s3c64xx_dma_client_out,
	54	.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
	55	.dma_size = 4,
	56	},
	57	[1] = {
	58	.channel = DMACH_I2S1_OUT,
	59	.client = &s3c64xx_dma_client_out,
	60	.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
	61	.dma_size = 4,
	62	},
	63	};
	64
65	static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
66	[0] = {
67	.channel = DMACH_I2S0_IN,
68	.client = &s3c64xx_dma_client_in,
69	.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
70	.dma_size = 4,
71	},
72	[1] = {
73	.channel = DMACH_I2S1_IN,
74	.client = &s3c64xx_dma_client_in,
75	.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
76	.dma_size = 4,
77	},
78	};
79
80	static struct s3c_i2sv2_info s3c64xx_i2s[2];
81
82	static inline struct s3c_i2sv2_info to_info(struct snd_soc_dai cpu_dai)
83	{
84	return cpu_dai->private_data;
85	}
86
87	static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
88	int clk_id, unsigned int freq, int dir)
89	{
90	struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
91	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
92
93	switch (clk_id) {
94	case S3C64XX_CLKSRC_PCLK:
95	iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
96	break;
97
98	case S3C64XX_CLKSRC_MUX:
99	iismod \|= S3C64XX_IISMOD_IMS_SYSMUX;
100	break;
101
102	default:
103	return -EINVAL;
104	}
105
106	writel(iismod, i2s->regs + S3C2412_IISMOD);
107
108	return 0;
109	}
110
111
112	unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai)
113	{
114	struct s3c_i2sv2_info *i2s = to_info(dai);
115
116	return clk_get_rate(i2s->iis_cclk);
117	}
118	EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate);
119
120	static int s3c64xx_i2s_probe(struct platform_device *pdev,
121	struct snd_soc_dai *dai)
122	{
123	struct device *dev = &pdev->dev;
124	struct s3c_i2sv2_info *i2s;
125	int ret;
126
127	dev_dbg(dev, "%s: probing dai %d\n", __func__, pdev->id);
128
129	if (pdev->id < 0 \|\| pdev->id > ARRAY_SIZE(s3c64xx_i2s)) {
130	dev_err(dev, "id %d out of range\n", pdev->id);
131	return -EINVAL;
132	}
133
134	i2s = &s3c64xx_i2s[pdev->id];
135
136	ret = s3c_i2sv2_probe(pdev, dai, i2s,
137	pdev->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
138	if (ret)
139	return ret;
140
141	i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
142	i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
143
144	i2s->iis_cclk = clk_get(dev, "audio-bus");
145	if (IS_ERR(i2s->iis_cclk)) {
146	dev_err(dev, "failed to get audio-bus");
147	iounmap(i2s->regs);
148	return -ENODEV;
149	}
150
151	/* configure GPIO for i2s port */
152	switch (pdev->id) {
153	case 0:
154	s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
155	s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
156	s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
157	s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
158	s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
159	break;
160	case 1:
161	s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
162	s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
163	s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
164	s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
165	s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
166	}
167
168	return 0;
169	}
170
171
172	#define S3C64XX_I2S_RATES \
173	(SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| SNDRV_PCM_RATE_16000 \| \
174	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
175	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
176
177	#define S3C64XX_I2S_FMTS \
178	(SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_S16_LE)
179
f2a5d6a2 MB	180	static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
	181	.set_sysclk = s3c64xx_i2s_set_sysclk,
	182	};
	183
f8cf8176 BD	184	struct snd_soc_dai s3c64xx_i2s_dai = {
	185	.name = "s3c64xx-i2s",
	186	.id = 0,
	187	.probe = s3c64xx_i2s_probe,
	188	.playback = {
	189	.channels_min = 2,
	190	.channels_max = 2,
	191	.rates = S3C64XX_I2S_RATES,
	192	.formats = S3C64XX_I2S_FMTS,
	193	},
	194	.capture = {
	195	.channels_min = 2,
	196	.channels_max = 2,
	197	.rates = S3C64XX_I2S_RATES,
	198	.formats = S3C64XX_I2S_FMTS,
	199	},
f2a5d6a2	200	.ops = &s3c64xx_i2s_dai_ops,
f8cf8176 BD	201	};
	202	EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
	203
	204	static int __init s3c64xx_i2s_init(void)
	205	{
	206	return s3c_i2sv2_register_dai(&s3c64xx_i2s_dai);
	207	}
	208	module_init(s3c64xx_i2s_init);
	209
	210	static void __exit s3c64xx_i2s_exit(void)
	211	{
	212	snd_soc_unregister_dai(&s3c64xx_i2s_dai);
	213	}
	214	module_exit(s3c64xx_i2s_exit);
	215
	216	/* Module information */
	217	MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
	218	MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
	219	MODULE_LICENSE("GPL");
	220
	221
	222