arch/arm/mach-s3c24xx/s3c2410.c

   1 /* linux/arch/arm/mach-s3c2410/s3c2410.c
   2  *
   3  * Copyright (c) 2003-2005 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * http://www.simtec.co.uk/products/EB2410ITX/
   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/gpio.h>
  20 #include <linux/clk.h>
  21 #include <linux/device.h>
  22 #include <linux/syscore_ops.h>
  23 #include <linux/serial_core.h>
  24 #include <linux/serial_s3c.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/reboot.h>
  27 #include <linux/io.h>
  28
  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 <mach/gpio-samsung.h>
  35 #include <asm/irq.h>
  36 #include <asm/system_misc.h>
  37
  38 #include <plat/cpu-freq.h>
  39
  40 #include <mach/regs-clock.h>
  41
  42 #include <plat/cpu.h>
  43 #include <plat/devs.h>
  44 #include <plat/pm.h>
  45 #include <plat/watchdog-reset.h>
  46
  47 #include <plat/gpio-core.h>
  48 #include <plat/gpio-cfg.h>
  49 #include <plat/gpio-cfg-helpers.h>
  50
  51 #include "common.h"
  52
  53 /* Initial IO mappings */
  54
  55 static struct map_desc s3c2410_iodesc[] __initdata = {
  56         IODESC_ENT(CLKPWR),
  57         IODESC_ENT(TIMER),
  58         IODESC_ENT(WATCHDOG),
  59 };
  60
  61 /* our uart devices */
  62
  63 /* uart registration process */
  64
  65 void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  66 {
  67         s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
  68 }
  69
  70 /* s3c2410_map_io
  71  *
  72  * register the standard cpu IO areas, and any passed in from the
  73  * machine specific initialisation.
  74 */
  75
  76 void __init s3c2410_map_io(void)
  77 {
  78         s3c24xx_gpiocfg_default.set_pull = s3c24xx_gpio_setpull_1up;
  79         s3c24xx_gpiocfg_default.get_pull = s3c24xx_gpio_getpull_1up;
  80
  81         iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
  82 }
  83
  84 struct bus_type s3c2410_subsys = {
  85         .name = "s3c2410-core",
  86         .dev_name = "s3c2410-core",
  87 };
  88
  89 /* Note, we would have liked to name this s3c2410-core, but we cannot
  90  * register two subsystems with the same name.
  91  */
  92 struct bus_type s3c2410a_subsys = {
  93         .name = "s3c2410a-core",
  94         .dev_name = "s3c2410a-core",
  95 };
  96
  97 static struct device s3c2410_dev = {
  98         .bus            = &s3c2410_subsys,
  99 };
 100
 101 /* need to register the subsystem before we actually register the device, and
 102  * we also need to ensure that it has been initialised before any of the
 103  * drivers even try to use it (even if not on an s3c2410 based system)
 104  * as a driver which may support both 2410 and 2440 may try and use it.
 105 */
 106
 107 static int __init s3c2410_core_init(void)
 108 {
 109         return subsys_system_register(&s3c2410_subsys, NULL);
 110 }
 111
 112 core_initcall(s3c2410_core_init);
 113
 114 static int __init s3c2410a_core_init(void)
 115 {
 116         return subsys_system_register(&s3c2410a_subsys, NULL);
 117 }
 118
 119 core_initcall(s3c2410a_core_init);
 120
 121 int __init s3c2410_init(void)
 122 {
 123         printk("S3C2410: Initialising architecture\n");
 124
 125 #ifdef CONFIG_PM
 126         register_syscore_ops(&s3c2410_pm_syscore_ops);
 127         register_syscore_ops(&s3c24xx_irq_syscore_ops);
 128 #endif
 129
 130         return device_register(&s3c2410_dev);
 131 }
 132
 133 int __init s3c2410a_init(void)
 134 {
 135         s3c2410_dev.bus = &s3c2410a_subsys;
 136         return s3c2410_init();
 137 }
 138
 139 void s3c2410_restart(enum reboot_mode mode, const char *cmd)
 140 {
 141         if (mode == REBOOT_SOFT) {
 142                 soft_restart(0);
 143         }
 144
 145         samsung_wdt_reset();
 146
 147         /* we'll take a jump through zero as a poor second */
 148         soft_restart(0);
 149 }