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
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27 #include <asm/mach/irq.h>
  28
  29 #include <asm/proc-fns.h>
  30
  31 #include <mach/hardware.h>
  32 #include <mach/map.h>
  33 #include <asm/irq.h>
  34
  35 #include <plat/regs-serial.h>
  36 #include <mach/regs-clock.h>
  37
  38 #include <plat/cpu.h>
  39 #include <plat/devs.h>
  40 #include <plat/clock.h>
  41 #include <plat/iic-core.h>
  42 #include <plat/sdhci.h>
  43 #include <plat/s5pc100.h>
  44
  45 /* Initial IO mappings */
  46
  47 static struct map_desc s5pc100_iodesc[] __initdata = {
  48         {
  49                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  50                 .pfn            = __phys_to_pfn(S5PC100_PA_SYSTIMER),
  51                 .length         = SZ_16K,
  52                 .type           = MT_DEVICE,
  53         }, {
  54                 .virtual        = (unsigned long)VA_VIC2,
  55                 .pfn            = __phys_to_pfn(S5PC100_PA_VIC2),
  56                 .length         = SZ_16K,
  57                 .type           = MT_DEVICE,
  58         }, {
  59                 .virtual        = (unsigned long)S5PC100_VA_OTHERS,
  60                 .pfn            = __phys_to_pfn(S5PC100_PA_OTHERS),
  61                 .length         = SZ_4K,
  62                 .type           = MT_DEVICE,
  63         }
  64 };
  65
  66 static void s5pc100_idle(void)
  67 {
  68         if (!need_resched())
  69                 cpu_do_idle();
  70
  71         local_irq_enable();
  72 }
  73
  74 /* s5pc100_map_io
  75  *
  76  * register the standard cpu IO areas
  77 */
  78
  79 void __init s5pc100_map_io(void)
  80 {
  81         iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
  82
  83         /* initialise device information early */
  84         s5pc100_default_sdhci0();
  85         s5pc100_default_sdhci1();
  86         s5pc100_default_sdhci2();
  87
  88         /* the i2c devices are directly compatible with s3c2440 */
  89         s3c_i2c0_setname("s3c2440-i2c");
  90         s3c_i2c1_setname("s3c2440-i2c");
  91 }
  92
  93 void __init s5pc100_init_clocks(int xtal)
  94 {
  95         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
  96
  97         s3c24xx_register_baseclocks(xtal);
  98         s5p_register_clocks(xtal);
  99         s5pc100_register_clocks();
 100         s5pc100_setup_clocks();
 101 }
 102
 103 void __init s5pc100_init_irq(void)
 104 {
 105         u32 vic[] = {~0, ~0, ~0};
 106
 107         /* VIC0, VIC1, and VIC2 are fully populated. */
 108         s5p_init_irq(vic, ARRAY_SIZE(vic));
 109 }
 110
 111 static struct sysdev_class s5pc100_sysclass = {
 112         .name   = "s5pc100-core",
 113 };
 114
 115 static struct sys_device s5pc100_sysdev = {
 116         .cls    = &s5pc100_sysclass,
 117 };
 118
 119 static int __init s5pc100_core_init(void)
 120 {
 121         return sysdev_class_register(&s5pc100_sysclass);
 122 }
 123
 124 core_initcall(s5pc100_core_init);
 125
 126 int __init s5pc100_init(void)
 127 {
 128         printk(KERN_INFO "S5PC100: Initializing architecture\n");
 129
 130         /* set idle function */
 131         pm_idle = s5pc100_idle;
 132
 133         return sysdev_register(&s5pc100_sysdev);
 134 }