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Commit f8cf8176 authored by Ben Dooks's avatar Ben Dooks Committed by Mark Brown
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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 Diff line number Diff line
@@ -33,6 +33,9 @@ 
#define S3C2412_IISCON_RXDMA_ACTIVE	(1 << 1)

#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_EXTERNAL	(1 << 10)

#define S3C2412_IISMOD_SLAVE		(2 << 10)

sound/soc/s3c24xx/Kconfig

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

	tristate "SoC Audio for the Samsung S3C24XX chips"

	depends on ARCH_S3C2410

	depends on ARCH_S3C2410 || ARCH_S3C64XX

	help

	  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
@@ -16,6 +16,10 @@ config SND_S3C2412_SOC_I2S 
	tristate

	select SND_S3C_I2SV2_SOC



config SND_S3C64XX_SOC_I2S

	tristate

	select SND_S3C_I2SV2_SOC



config SND_S3C2443_SOC_AC97

	tristate

	select AC97_BUS

sound/soc/s3c24xx/Makefile

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

snd-soc-s3c24xx-i2s-objs := s3c24xx-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-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_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.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



# S3C24XX Machine Support

sound/soc/s3c24xx/s3c64xx-i2s.c

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/* 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 */