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/clock.h>
  42 #include <plat/devs.h>
  43 #include <plat/cpu.h>
  44 #include <plat/pm.h>
  45 #include <plat/pll.h>
  46 #include <plat/nand-core.h>
  47 #include <plat/watchdog-reset.h>
  48
  49 #include "common.h"
  50 #include "regs-dsc.h"
  51
  52 static struct map_desc s3c244x_iodesc[] __initdata = {
  53         IODESC_ENT(CLKPWR),
  54         IODESC_ENT(TIMER),
  55         IODESC_ENT(WATCHDOG),
  56 };
  57
  58 /* uart initialisation */
  59
  60 void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  61 {
  62         s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
  63 }
  64
  65 void __init s3c244x_map_io(void)
  66 {
  67         /* register our io-tables */
  68
  69         iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
  70
  71         /* rename any peripherals used differing from the s3c2410 */
  72
  73         s3c_device_sdi.name  = "s3c2440-sdi";
  74         s3c_device_i2c0.name  = "s3c2440-i2c";
  75         s3c_nand_setname("s3c2440-nand");
  76         s3c_device_ts.name = "s3c2440-ts";
  77         s3c_device_usbgadget.name = "s3c2440-usbgadget";
  78         s3c2410_device_dclk.name = "s3c2440-dclk";
  79 }
  80
  81 void __init_or_cpufreq s3c244x_setup_clocks(void)
  82 {
  83 }
  84
  85 /* Since the S3C2442 and S3C2440 share items, put both subsystems here */
  86
  87 struct bus_type s3c2440_subsys = {
  88         .name           = "s3c2440-core",
  89         .dev_name       = "s3c2440-core",
  90 };
  91
  92 struct bus_type s3c2442_subsys = {
  93         .name           = "s3c2442-core",
  94         .dev_name       = "s3c2442-core",
  95 };
  96
  97 /* need to register the subsystem before we actually register the device, and
  98  * we also need to ensure that it has been initialised before any of the
  99  * drivers even try to use it (even if not on an s3c2440 based system)
 100  * as a driver which may support both 2410 and 2440 may try and use it.
 101 */
 102
 103 static int __init s3c2440_core_init(void)
 104 {
 105         return subsys_system_register(&s3c2440_subsys, NULL);
 106 }
 107
 108 core_initcall(s3c2440_core_init);
 109
 110 static int __init s3c2442_core_init(void)
 111 {
 112         return subsys_system_register(&s3c2442_subsys, NULL);
 113 }
 114
 115 core_initcall(s3c2442_core_init);
 116
 117
 118 #ifdef CONFIG_PM
 119 static struct sleep_save s3c244x_sleep[] = {
 120         SAVE_ITEM(S3C2440_DSC0),
 121         SAVE_ITEM(S3C2440_DSC1),
 122         SAVE_ITEM(S3C2440_GPJDAT),
 123         SAVE_ITEM(S3C2440_GPJCON),
 124         SAVE_ITEM(S3C2440_GPJUP)
 125 };
 126
 127 static int s3c244x_suspend(void)
 128 {
 129         s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 130         return 0;
 131 }
 132
 133 static void s3c244x_resume(void)
 134 {
 135         s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 136 }
 137 #else
 138 #define s3c244x_suspend NULL
 139 #define s3c244x_resume  NULL
 140 #endif
 141
 142 struct syscore_ops s3c244x_pm_syscore_ops = {
 143         .suspend        = s3c244x_suspend,
 144         .resume         = s3c244x_resume,
 145 };
 146
 147 void s3c244x_restart(enum reboot_mode mode, const char *cmd)
 148 {
 149         if (mode == REBOOT_SOFT)
 150                 soft_restart(0);
 151
 152         samsung_wdt_reset();
 153
 154         /* we'll take a jump through zero as a poor second */
 155         soft_restart(0);
 156 }