arch/arm/mach-s3c/simtec-audio.c

   1 // SPDX-License-Identifier: GPL-2.0
   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 #include <linux/kernel.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/init.h>
  12 #include <linux/device.h>
  13 #include <linux/io.h>
  14
  15 #include "regs-gpio.h"
  16 #include "gpio-samsung.h"
  17 #include "gpio-cfg.h"
  18
  19 #include <linux/platform_data/asoc-s3c24xx_simtec.h>
  20 #include "devs.h"
  21
  22 #include "bast.h"
  23 #include "simtec.h"
  24
  25 /* platform ops for audio */
  26
  27 static void simtec_audio_startup_lrroute(void)
  28 {
  29         unsigned int tmp;
  30         unsigned long flags;
  31
  32         local_irq_save(flags);
  33
  34         tmp = __raw_readb(BAST_VA_CTRL1);
  35         tmp &= ~BAST_CPLD_CTRL1_LRMASK;
  36         tmp |= BAST_CPLD_CTRL1_LRCDAC;
  37         __raw_writeb(tmp, BAST_VA_CTRL1);
  38
  39         local_irq_restore(flags);
  40 }
  41
  42 static struct s3c24xx_audio_simtec_pdata simtec_audio_platdata;
  43 static char our_name[32];
  44
  45 static struct platform_device simtec_audio_dev = {
  46         .name   = our_name,
  47         .id     = -1,
  48         .dev    = {
  49                 .parent         = &s3c_device_iis.dev,
  50                 .platform_data  = &simtec_audio_platdata,
  51         },
  52 };
  53
  54 int __init simtec_audio_add(const char *name, bool has_lr_routing,
  55                             struct s3c24xx_audio_simtec_pdata *spd)
  56 {
  57         if (!name)
  58                 name = "tlv320aic23";
  59
  60         snprintf(our_name, sizeof(our_name)-1, "s3c24xx-simtec-%s", name);
  61
  62         /* copy platform data so the source can be __initdata */
  63         if (spd)
  64                 simtec_audio_platdata = *spd;
  65
  66         if (has_lr_routing)
  67                 simtec_audio_platdata.startup = simtec_audio_startup_lrroute;
  68
  69         /* Configure the I2S pins (GPE0...GPE4) in correct mode */
  70         s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
  71                               S3C_GPIO_PULL_NONE);
  72
  73         platform_device_register(&s3c_device_iis);
  74         platform_device_register(&simtec_audio_dev);
  75         return 0;
  76 }