arch/arm/mach-s3c24xx/s3c244x.c

   1 /* linux/arch/arm/plat-s3c24xx/s3c244x.c
   2  *
   3  * Copyright (c) 2004-2006 Simtec Electronics
   4  *   Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
   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/serial_core.h>
  20 #include <linux/serial_s3c.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/reboot.h>
  23 #include <linux/device.h>
  24 #include <linux/syscore_ops.h>
  25 #include <linux/clk.h>
  26 #include <linux/io.h>
  27
  28 #include <asm/system_misc.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/irq.h>
  32
  33 #include <mach/hardware.h>
  34 #include <asm/irq.h>
  35
  36 #include <plat/cpu-freq.h>
  37
  38 #include <mach/regs-clock.h>
  39 #include <mach/regs-gpio.h>
  40
  41 #include <plat/devs.h>
  42 #include <plat/cpu.h>
  43 #include <plat/pm.h>
  44 #include <plat/nand-core.h>
  45 #include <plat/watchdog-reset.h>
  46
  47 #include "common.h"
  48 #include "regs-dsc.h"
  49
  50 static struct map_desc s3c244x_iodesc[] __initdata = {
  51         IODESC_ENT(CLKPWR),
  52         IODESC_ENT(TIMER),
  53         IODESC_ENT(WATCHDOG),
  54 };
  55
  56 /* uart initialisation */
  57
  58 void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  59 {
  60         s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
  61 }
  62
  63 void __init s3c244x_map_io(void)
  64 {
  65         /* register our io-tables */
  66
  67         iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
  68
  69         /* rename any peripherals used differing from the s3c2410 */
  70
  71         s3c_device_sdi.name  = "s3c2440-sdi";
  72         s3c_device_i2c0.name  = "s3c2440-i2c";
  73         s3c_nand_setname("s3c2440-nand");
  74         s3c_device_ts.name = "s3c2440-ts";
  75         s3c_device_usbgadget.name = "s3c2440-usbgadget";
  76         s3c2410_device_dclk.name = "s3c2440-dclk";
  77 }
  78
  79 /* Since the S3C2442 and S3C2440 share items, put both subsystems here */
  80
  81 struct bus_type s3c2440_subsys = {
  82         .name           = "s3c2440-core",
  83         .dev_name       = "s3c2440-core",
  84 };
  85
  86 struct bus_type s3c2442_subsys = {
  87         .name           = "s3c2442-core",
  88         .dev_name       = "s3c2442-core",
  89 };
  90
  91 /* need to register the subsystem before we actually register the device, and
  92  * we also need to ensure that it has been initialised before any of the
  93  * drivers even try to use it (even if not on an s3c2440 based system)
  94  * as a driver which may support both 2410 and 2440 may try and use it.
  95 */
  96
  97 static int __init s3c2440_core_init(void)
  98 {
  99         return subsys_system_register(&s3c2440_subsys, NULL);
 100 }
 101
 102 core_initcall(s3c2440_core_init);
 103
 104 static int __init s3c2442_core_init(void)
 105 {
 106         return subsys_system_register(&s3c2442_subsys, NULL);
 107 }
 108
 109 core_initcall(s3c2442_core_init);
 110
 111
 112 #ifdef CONFIG_PM
 113 static struct sleep_save s3c244x_sleep[] = {
 114         SAVE_ITEM(S3C2440_DSC0),
 115         SAVE_ITEM(S3C2440_DSC1),
 116         SAVE_ITEM(S3C2440_GPJDAT),
 117         SAVE_ITEM(S3C2440_GPJCON),
 118         SAVE_ITEM(S3C2440_GPJUP)
 119 };
 120
 121 static int s3c244x_suspend(void)
 122 {
 123         s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 124         return 0;
 125 }
 126
 127 static void s3c244x_resume(void)
 128 {
 129         s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 130 }
 131 #else
 132 #define s3c244x_suspend NULL
 133 #define s3c244x_resume  NULL
 134 #endif
 135
 136 struct syscore_ops s3c244x_pm_syscore_ops = {
 137         .suspend        = s3c244x_suspend,
 138         .resume         = s3c244x_resume,
 139 };
 140
 141 void s3c244x_restart(enum reboot_mode mode, const char *cmd)
 142 {
 143         if (mode == REBOOT_SOFT)
 144                 soft_restart(0);
 145
 146         samsung_wdt_reset();
 147
 148         /* we'll take a jump through zero as a poor second */
 149         soft_restart(0);
 150 }