release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s5pv210/cpu.c

   1 /* linux/arch/arm/mach-s5pv210/cpu.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9 */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/timer.h>
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <linux/sysdev.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/sched.h>
  23
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/mach/irq.h>
  27
  28 #include <asm/proc-fns.h>
  29 #include <mach/map.h>
  30 #include <mach/regs-clock.h>
  31
  32 #include <plat/cpu.h>
  33 #include <plat/devs.h>
  34 #include <plat/clock.h>
  35 #include <plat/fb-core.h>
  36 #include <plat/s5pv210.h>
  37 #include <plat/adc-core.h>
  38 #include <plat/ata-core.h>
  39 #include <plat/fimc-core.h>
  40 #include <plat/iic-core.h>
  41 #include <plat/keypad-core.h>
  42 #include <plat/sdhci.h>
  43 #include <plat/reset.h>
  44
  45 /* Initial IO mappings */
  46
  47 static struct map_desc s5pv210_iodesc[] __initdata = {
  48         {
  49                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  50                 .pfn            = __phys_to_pfn(S5PV210_PA_SYSTIMER),
  51                 .length         = SZ_4K,
  52                 .type           = MT_DEVICE,
  53         }, {
  54                 .virtual        = (unsigned long)VA_VIC2,
  55                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC2),
  56                 .length         = SZ_16K,
  57                 .type           = MT_DEVICE,
  58         }, {
  59                 .virtual        = (unsigned long)VA_VIC3,
  60                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC3),
  61                 .length         = SZ_16K,
  62                 .type           = MT_DEVICE,
  63         }, {
  64                 .virtual        = (unsigned long)S5P_VA_SROMC,
  65                 .pfn            = __phys_to_pfn(S5PV210_PA_SROMC),
  66                 .length         = SZ_4K,
  67                 .type           = MT_DEVICE,
  68         }
  69 };
  70
  71 static void s5pv210_idle(void)
  72 {
  73         if (!need_resched())
  74                 cpu_do_idle();
  75
  76         local_irq_enable();
  77 }
  78
  79 static void s5pv210_sw_reset(void)
  80 {
  81         __raw_writel(0x1, S5P_SWRESET);
  82 }
  83
  84 /* s5pv210_map_io
  85  *
  86  * register the standard cpu IO areas
  87 */
  88
  89 void __init s5pv210_map_io(void)
  90 {
  91         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
  92
  93         /* initialise device information early */
  94         s5pv210_default_sdhci0();
  95         s5pv210_default_sdhci1();
  96         s5pv210_default_sdhci2();
  97         s5pv210_default_sdhci3();
  98
  99         s3c_adc_setname("s3c64xx-adc");
 100
 101         s3c_cfcon_setname("s5pv210-pata");
 102
 103         s3c_fimc_setname(0, "s5pv210-fimc");
 104         s3c_fimc_setname(1, "s5pv210-fimc");
 105         s3c_fimc_setname(2, "s5pv210-fimc");
 106
 107         /* the i2c devices are directly compatible with s3c2440 */
 108         s3c_i2c0_setname("s3c2440-i2c");
 109         s3c_i2c1_setname("s3c2440-i2c");
 110         s3c_i2c2_setname("s3c2440-i2c");
 111
 112         s3c_fb_setname("s5pv210-fb");
 113
 114         /* Use s5pv210-keypad instead of samsung-keypad */
 115         samsung_keypad_setname("s5pv210-keypad");
 116 }
 117
 118 void __init s5pv210_init_clocks(int xtal)
 119 {
 120         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 121
 122         s3c24xx_register_baseclocks(xtal);
 123         s5p_register_clocks(xtal);
 124         s5pv210_register_clocks();
 125         s5pv210_setup_clocks();
 126 }
 127
 128 void __init s5pv210_init_irq(void)
 129 {
 130         u32 vic[4];     /* S5PV210 supports 4 VIC */
 131
 132         /* All the VICs are fully populated. */
 133         vic[0] = ~0;
 134         vic[1] = ~0;
 135         vic[2] = ~0;
 136         vic[3] = ~0;
 137
 138         s5p_init_irq(vic, ARRAY_SIZE(vic));
 139 }
 140
 141 struct sysdev_class s5pv210_sysclass = {
 142         .name   = "s5pv210-core",
 143 };
 144
 145 static struct sys_device s5pv210_sysdev = {
 146         .cls    = &s5pv210_sysclass,
 147 };
 148
 149 static int __init s5pv210_core_init(void)
 150 {
 151         return sysdev_class_register(&s5pv210_sysclass);
 152 }
 153
 154 core_initcall(s5pv210_core_init);
 155
 156 int __init s5pv210_init(void)
 157 {
 158         printk(KERN_INFO "S5PV210: Initializing architecture\n");
 159
 160         /* set idle function */
 161         pm_idle = s5pv210_idle;
 162
 163         /* set sw_reset function */
 164         s5p_reset_hook = s5pv210_sw_reset;
 165
 166         return sysdev_register(&s5pv210_sysdev);
 167 }