arch/arm/mach-s3c2443/s3c2443.c

   1 /* linux/arch/arm/mach-s3c2443/s3c2443.c
   2  *
   3  * Copyright (c) 2007 Simtec Electronics
   4  *   Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * Samsung S3C2443 Mobile CPU support
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/list.h>
  17 #include <linux/timer.h>
  18 #include <linux/init.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/sysdev.h>
  22 #include <linux/clk.h>
  23
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/mach/irq.h>
  27
  28 #include <asm/hardware.h>
  29 #include <asm/io.h>
  30 #include <asm/irq.h>
  31
  32 #include <asm/arch/regs-s3c2443-clock.h>
  33 #include <asm/arch/reset.h>
  34
  35 #include <asm/plat-s3c24xx/s3c2443.h>
  36 #include <asm/plat-s3c24xx/devs.h>
  37 #include <asm/plat-s3c24xx/cpu.h>
  38
  39 static struct map_desc s3c2443_iodesc[] __initdata = {
  40         IODESC_ENT(WATCHDOG),
  41         IODESC_ENT(CLKPWR),
  42         IODESC_ENT(TIMER),
  43 };
  44
  45 struct sysdev_class s3c2443_sysclass = {
  46         .name = "s3c2443-core",
  47 };
  48
  49 static struct sys_device s3c2443_sysdev = {
  50         .cls            = &s3c2443_sysclass,
  51 };
  52
  53 static void s3c2443_hard_reset(void)
  54 {
  55         __raw_writel(S3C2443_SWRST_RESET, S3C2443_SWRST);
  56 }
  57
  58 int __init s3c2443_init(void)
  59 {
  60         printk("S3C2443: Initialising architecture\n");
  61
  62         s3c24xx_reset_hook = s3c2443_hard_reset;
  63
  64         s3c_device_nand.name = "s3c2412-nand";
  65
  66         /* change WDT IRQ number */
  67         s3c_device_wdt.resource[1].start = IRQ_S3C2443_WDT;
  68         s3c_device_wdt.resource[1].end   = IRQ_S3C2443_WDT;
  69
  70         return sysdev_register(&s3c2443_sysdev);
  71 }
  72
  73 void __init s3c2443_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  74 {
  75         s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
  76 }
  77
  78 /* s3c2443_map_io
  79  *
  80  * register the standard cpu IO areas, and any passed in from the
  81  * machine specific initialisation.
  82  */
  83
  84 void __init s3c2443_map_io(struct map_desc *mach_desc, int mach_size)
  85 {
  86         iotable_init(s3c2443_iodesc, ARRAY_SIZE(s3c2443_iodesc));
  87         iotable_init(mach_desc, mach_size);
  88 }
  89
  90 /* need to register class before we actually register the device, and
  91  * we also need to ensure that it has been initialised before any of the
  92  * drivers even try to use it (even if not on an s3c2443 based system)
  93  * as a driver which may support both 2443 and 2440 may try and use it.
  94 */
  95
  96 static int __init s3c2443_core_init(void)
  97 {
  98         return sysdev_class_register(&s3c2443_sysclass);
  99 }
 100
 101 core_initcall(s3c2443_core_init);