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Commit f8cf8176 authored by Ben Dooks's avatar Ben Dooks Committed by Mark Brown
Browse files

ASoC: Add s3c64xx-i2s support 



Add the initial code to support the S3C64XX I2S hardware using the
s3c-i2s-v2 core code.

Signed-off-by: default avatarBen Dooks <ben@simtec.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent dc85447b

arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -33,6 +33,9 @@ 
#define S3C2412_IISCON_RXDMA_ACTIVE	(1 << 1)

#define S3C2412_IISCON_RXDMA_ACTIVE	(1 << 1)

#define S3C2412_IISCON_IIS_ACTIVE	(1 << 0)

#define S3C2412_IISCON_IIS_ACTIVE	(1 << 0)





#define S3C64XX_IISMOD_IMS_PCLK		(0 << 10)

#define S3C64XX_IISMOD_IMS_SYSMUX	(1 << 10)



#define S3C2412_IISMOD_MASTER_INTERNAL	(0 << 10)

#define S3C2412_IISMOD_MASTER_INTERNAL	(0 << 10)

#define S3C2412_IISMOD_MASTER_EXTERNAL	(1 << 10)

#define S3C2412_IISMOD_MASTER_EXTERNAL	(1 << 10)

#define S3C2412_IISMOD_SLAVE		(2 << 10)

#define S3C2412_IISMOD_SLAVE		(2 << 10)

sound/soc/s3c24xx/Kconfig

+5 −1
Original line number Original line Diff line number Diff line 
config SND_S3C24XX_SOC

config SND_S3C24XX_SOC

	tristate "SoC Audio for the Samsung S3C24XX chips"

	tristate "SoC Audio for the Samsung S3C24XX chips"

	depends on ARCH_S3C2410

	depends on ARCH_S3C2410 || ARCH_S3C64XX

	help

	help

	  Say Y or M if you want to add support for codecs attached to

	  Say Y or M if you want to add support for codecs attached to

	  the S3C24XX AC97, I2S or SSP interface. You will also need

	  the S3C24XX AC97, I2S or SSP interface. You will also need
@@ -16,6 +16,10 @@ config SND_S3C2412_SOC_I2S 
	tristate

	tristate

	select SND_S3C_I2SV2_SOC

	select SND_S3C_I2SV2_SOC





config SND_S3C64XX_SOC_I2S

	tristate

	select SND_S3C_I2SV2_SOC



config SND_S3C2443_SOC_AC97

config SND_S3C2443_SOC_AC97

	tristate

	tristate

	select AC97_BUS

	select AC97_BUS

sound/soc/s3c24xx/Makefile

+2 −0
Original line number Original line Diff line number Diff line
@@ -2,6 +2,7 @@ 
snd-soc-s3c24xx-objs := s3c24xx-pcm.o

snd-soc-s3c24xx-objs := s3c24xx-pcm.o

snd-soc-s3c24xx-i2s-objs := s3c24xx-i2s.o

snd-soc-s3c24xx-i2s-objs := s3c24xx-i2s.o

snd-soc-s3c2412-i2s-objs := s3c2412-i2s.o

snd-soc-s3c2412-i2s-objs := s3c2412-i2s.o

snd-soc-s3c64xx-i2s-objs := s3c64xx-i2s.o

snd-soc-s3c2443-ac97-objs := s3c2443-ac97.o

snd-soc-s3c2443-ac97-objs := s3c2443-ac97.o

snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o

snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o
@@ -9,6 +10,7 @@ obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o 
obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o

obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o

obj-$(CONFIG_SND_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.o

obj-$(CONFIG_SND_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.o

obj-$(CONFIG_SND_S3C2412_SOC_I2S) += snd-soc-s3c2412-i2s.o

obj-$(CONFIG_SND_S3C2412_SOC_I2S) += snd-soc-s3c2412-i2s.o

obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += snd-soc-s3c64xx-i2s.o

obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o

obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o





# S3C24XX Machine Support

# S3C24XX Machine Support

sound/soc/s3c24xx/s3c64xx-i2s.c

0 → 100644
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Original line number Original line Diff line number Diff line 
/* 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)



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 = {

		.set_sysclk	= s3c64xx_i2s_set_sysclk,

	},

};

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");

sound/soc/s3c24xx/s3c64xx-i2s.h

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/* sound/soc/s3c24xx/s3c64xx-i2s.h

 *

 * 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.

 */



#ifndef __SND_SOC_S3C24XX_S3C64XX_I2S_H

#define __SND_SOC_S3C24XX_S3C64XX_I2S_H __FILE__



#include "s3c-i2s-v2.h"



#define S3C64XX_DIV_BCLK	S3C_I2SV2_DIV_BCLK

#define S3C64XX_DIV_RCLK	S3C_I2SV2_DIV_RCLK

#define S3C64XX_DIV_PRESCALER	S3C_I2SV2_DIV_PRESCALER



#define S3C64XX_CLKSRC_PCLK	(0)

#define S3C64XX_CLKSRC_MUX	(1)



extern struct snd_soc_dai s3c64xx_i2s_dai;



extern unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *cpu_dai);



#endif /* __SND_SOC_S3C24XX_S3C64XX_I2S_H */