1. 根目录:
2. arch
3. arm
4. mach-s3c24xx
5. simtec-audio.c

/* linux/arch/arm/plat-s3c24xx/simtec-audio.c
 *
 * Copyright (c) 2009 Simtec Electronics
 *	http://armlinux.simtec.co.uk/
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * Audio setup for various Simtec S3C24XX implementations
 *
 * 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/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <mach/regs-gpio.h>

#include <linux/platform_data/asoc-s3c24xx_simtec.h>
#include <plat/devs.h>

#include "bast.h"
#include "simtec.h"

/* platform ops for audio */

static void simtec_audio_startup_lrroute(void)
{
	unsigned int tmp;
	unsigned long flags;

	local_irq_save(flags);

	tmp = __raw_readb(BAST_VA_CTRL1);
	tmp &= ~BAST_CPLD_CTRL1_LRMASK;
	tmp |= BAST_CPLD_CTRL1_LRCDAC;
	__raw_writeb(tmp, BAST_VA_CTRL1);

	local_irq_restore(flags);
}

static struct s3c24xx_audio_simtec_pdata simtec_audio_platdata;
static char our_name[32];

static struct platform_device simtec_audio_dev = {
	.name	= our_name,
	.id	= -1,
	.dev	= {
		.parent		= &s3c_device_iis.dev,
		.platform_data	= &simtec_audio_platdata,
	},
};

int __init simtec_audio_add(const char *name, bool has_lr_routing,
			    struct s3c24xx_audio_simtec_pdata *spd)
{
	if (!name)
		name = "tlv320aic23";

	snprintf(our_name, sizeof(our_name)-1, "s3c24xx-simtec-%s", name);

	/* copy platform data so the source can be __initdata */
	if (spd)
		simtec_audio_platdata = *spd;

	if (has_lr_routing)
		simtec_audio_platdata.startup = simtec_audio_startup_lrroute;

	platform_device_register(&s3c_device_iis);
	platform_device_register(&simtec_audio_dev);
	return 0;
}