LXR linux/arch/arm/mach-s3c24xx/simtec-audio.c

   1/* linux/arch/arm/plat-s3c24xx/simtec-audio.c
   2 *
   3 * Copyright (c) 2009 Simtec Electronics
   4 *      http://armlinux.simtec.co.uk/
   5 *      Ben Dooks <ben@simtec.co.uk>
   6 *
   7 * Audio setup for various Simtec S3C24XX implementations
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12*/
  13
  14#include <linux/kernel.h>
  15#include <linux/interrupt.h>
  16#include <linux/init.h>
  17#include <linux/device.h>
  18#include <linux/io.h>
  19
  20#include <mach/hardware.h>
  21#include <mach/regs-gpio.h>
  22
  23#include <linux/platform_data/asoc-s3c24xx_simtec.h>
  24#include <plat/devs.h>
  25
  26#include "bast.h"
  27#include "simtec.h"
  28
  29/* platform ops for audio */
  30
  31static void simtec_audio_startup_lrroute(void)
  32{
  33        unsigned int tmp;
  34        unsigned long flags;
  35
  36        local_irq_save(flags);
  37
  38        tmp = __raw_readb(BAST_VA_CTRL1);
  39        tmp &= ~BAST_CPLD_CTRL1_LRMASK;
  40        tmp |= BAST_CPLD_CTRL1_LRCDAC;
  41        __raw_writeb(tmp, BAST_VA_CTRL1);
  42
  43        local_irq_restore(flags);
  44}
  45
  46static struct s3c24xx_audio_simtec_pdata simtec_audio_platdata;
  47static char our_name[32];
  48
  49static struct platform_device simtec_audio_dev = {
  50        .name   = our_name,
  51        .id     = -1,
  52        .dev    = {
  53                .parent         = &s3c_device_iis.dev,
  54                .platform_data  = &simtec_audio_platdata,
  55        },
  56};
  57
  58int __init simtec_audio_add(const char *name, bool has_lr_routing,
  59                            struct s3c24xx_audio_simtec_pdata *spd)
  60{
  61        if (!name)
  62                name = "tlv320aic23";
  63
  64        snprintf(our_name, sizeof(our_name)-1, "s3c24xx-simtec-%s", name);
  65
  66        /* copy platform data so the source can be __initdata */
  67        if (spd)
  68                simtec_audio_platdata = *spd;
  69
  70        if (has_lr_routing)
  71                simtec_audio_platdata.startup = simtec_audio_startup_lrroute;
  72
  73        platform_device_register(&s3c_device_iis);
  74        platform_device_register(&simtec_audio_dev);
  75        return 0;
  76}
  77