simtec-audio.c

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/* linux/arch/arm/plat-s3c24xx/simtec-audio.c
 *
 * Copyright (c) 2009 Simtec Electronics
 *  http://armlinux.simtec.co.uk/
 *  Ben Dooks <[email protected]>
 *
 * 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/bast-map.h>
#include <mach/bast-irq.h>
#include <mach/bast-cpld.h>

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

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