release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s5pc100/cpu.c

   1 /* linux/arch/arm/mach-s5pc100/cpu.c
   2  *
   3  * Copyright 2009 Samsung Electronics Co.
   4  *      Byungho Min <bhmin@samsung.com>
   5  *
   6  * Based on mach-s3c6410/cpu.c
   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/clk.h>
  20 #include <linux/io.h>
  21 #include <linux/sysdev.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/sched.h>
  25
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/mach/irq.h>
  29
  30 #include <asm/proc-fns.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/map.h>
  34 #include <asm/irq.h>
  35
  36 #include <plat/regs-serial.h>
  37 #include <mach/regs-clock.h>
  38
  39 #include <plat/cpu.h>
  40 #include <plat/devs.h>
  41 #include <plat/clock.h>
  42 #include <plat/ata-core.h>
  43 #include <plat/iic-core.h>
  44 #include <plat/sdhci.h>
  45 #include <plat/adc-core.h>
  46 #include <plat/onenand-core.h>
  47 #include <plat/fb-core.h>
  48
  49 #include <plat/s5pc100.h>
  50
  51 /* Initial IO mappings */
  52
  53 static struct map_desc s5pc100_iodesc[] __initdata = {
  54         {
  55                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  56                 .pfn            = __phys_to_pfn(S5PC100_PA_SYSTIMER),
  57                 .length         = SZ_16K,
  58                 .type           = MT_DEVICE,
  59         }, {
  60                 .virtual        = (unsigned long)VA_VIC2,
  61                 .pfn            = __phys_to_pfn(S5P_PA_VIC2),
  62                 .length         = SZ_16K,
  63                 .type           = MT_DEVICE,
  64         }, {
  65                 .virtual        = (unsigned long)S5PC100_VA_OTHERS,
  66                 .pfn            = __phys_to_pfn(S5PC100_PA_OTHERS),
  67                 .length         = SZ_4K,
  68                 .type           = MT_DEVICE,
  69         }
  70 };
  71
  72 static void s5pc100_idle(void)
  73 {
  74         if (!need_resched())
  75                 cpu_do_idle();
  76
  77         local_irq_enable();
  78 }
  79
  80 /* s5pc100_map_io
  81  *
  82  * register the standard cpu IO areas
  83 */
  84
  85 void __init s5pc100_map_io(void)
  86 {
  87         iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
  88
  89         /* initialise device information early */
  90         s5pc100_default_sdhci0();
  91         s5pc100_default_sdhci1();
  92         s5pc100_default_sdhci2();
  93
  94         s3c_adc_setname("s3c64xx-adc");
  95
  96         /* the i2c devices are directly compatible with s3c2440 */
  97         s3c_i2c0_setname("s3c2440-i2c");
  98         s3c_i2c1_setname("s3c2440-i2c");
  99
 100         s3c_onenand_setname("s5pc100-onenand");
 101         s3c_fb_setname("s5pc100-fb");
 102         s3c_cfcon_setname("s5pc100-pata");
 103 }
 104
 105 void __init s5pc100_init_clocks(int xtal)
 106 {
 107         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 108
 109         s3c24xx_register_baseclocks(xtal);
 110         s5p_register_clocks(xtal);
 111         s5pc100_register_clocks();
 112         s5pc100_setup_clocks();
 113 }
 114
 115 void __init s5pc100_init_irq(void)
 116 {
 117         u32 vic[] = {~0, ~0, ~0};
 118
 119         /* VIC0, VIC1, and VIC2 are fully populated. */
 120         s5p_init_irq(vic, ARRAY_SIZE(vic));
 121 }
 122
 123 static struct sysdev_class s5pc100_sysclass = {
 124         .name   = "s5pc100-core",
 125 };
 126
 127 static struct sys_device s5pc100_sysdev = {
 128         .cls    = &s5pc100_sysclass,
 129 };
 130
 131 static int __init s5pc100_core_init(void)
 132 {
 133         return sysdev_class_register(&s5pc100_sysclass);
 134 }
 135
 136 core_initcall(s5pc100_core_init);
 137
 138 int __init s5pc100_init(void)
 139 {
 140         printk(KERN_INFO "S5PC100: Initializing architecture\n");
 141
 142         /* set idle function */
 143         pm_idle = s5pc100_idle;
 144
 145         return sysdev_register(&s5pc100_sysdev);
 146 }