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
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include <asm/proc-fns.h>
  28 #include <mach/map.h>
  29 #include <mach/regs-clock.h>
  30
  31 #include <plat/cpu.h>
  32 #include <plat/devs.h>
  33 #include <plat/clock.h>
  34 #include <plat/s5pv210.h>
  35 #include <plat/adc-core.h>
  36 #include <plat/ata-core.h>
  37 #include <plat/fimc-core.h>
  38 #include <plat/iic-core.h>
  39 #include <plat/keypad-core.h>
  40 #include <plat/sdhci.h>
  41 #include <plat/reset.h>
  42
  43 /* Initial IO mappings */
  44
  45 static struct map_desc s5pv210_iodesc[] __initdata = {
  46         {
  47                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  48                 .pfn            = __phys_to_pfn(S5PV210_PA_SYSTIMER),
  49                 .length         = SZ_1M,
  50                 .type           = MT_DEVICE,
  51         }, {
  52                 .virtual        = (unsigned long)VA_VIC2,
  53                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC2),
  54                 .length         = SZ_16K,
  55                 .type           = MT_DEVICE,
  56         }, {
  57                 .virtual        = (unsigned long)VA_VIC3,
  58                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC3),
  59                 .length         = SZ_16K,
  60                 .type           = MT_DEVICE,
  61         }, {
  62                 .virtual        = (unsigned long)S5P_VA_SROMC,
  63                 .pfn            = __phys_to_pfn(S5PV210_PA_SROMC),
  64                 .length         = SZ_4K,
  65                 .type           = MT_DEVICE,
  66         }
  67 };
  68
  69 static void s5pv210_idle(void)
  70 {
  71         if (!need_resched())
  72                 cpu_do_idle();
  73
  74         local_irq_enable();
  75 }
  76
  77 static void s5pv210_sw_reset(void)
  78 {
  79         __raw_writel(0x1, S5P_SWRESET);
  80 }
  81
  82 /* s5pv210_map_io
  83  *
  84  * register the standard cpu IO areas
  85 */
  86
  87 void __init s5pv210_map_io(void)
  88 {
  89         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
  90
  91         /* initialise device information early */
  92         s5pv210_default_sdhci0();
  93         s5pv210_default_sdhci1();
  94         s5pv210_default_sdhci2();
  95         s5pv210_default_sdhci3();
  96
  97         s3c_adc_setname("s3c64xx-adc");
  98
  99         s3c_cfcon_setname("s5pv210-pata");
 100
 101         s3c_fimc_setname(0, "s5pv210-fimc");
 102         s3c_fimc_setname(1, "s5pv210-fimc");
 103         s3c_fimc_setname(2, "s5pv210-fimc");
 104
 105         /* the i2c devices are directly compatible with s3c2440 */
 106         s3c_i2c0_setname("s3c2440-i2c");
 107         s3c_i2c1_setname("s3c2440-i2c");
 108         s3c_i2c2_setname("s3c2440-i2c");
 109
 110         /* Use s5pv210-keypad instead of samsung-keypad */
 111         samsung_keypad_setname("s5pv210-keypad");
 112 }
 113
 114 void __init s5pv210_init_clocks(int xtal)
 115 {
 116         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 117
 118         s3c24xx_register_baseclocks(xtal);
 119         s5p_register_clocks(xtal);
 120         s5pv210_register_clocks();
 121         s5pv210_setup_clocks();
 122 }
 123
 124 void __init s5pv210_init_irq(void)
 125 {
 126         u32 vic[4];     /* S5PV210 supports 4 VIC */
 127
 128         /* All the VICs are fully populated. */
 129         vic[0] = ~0;
 130         vic[1] = ~0;
 131         vic[2] = ~0;
 132         vic[3] = ~0;
 133
 134         s5p_init_irq(vic, ARRAY_SIZE(vic));
 135 }
 136
 137 struct sysdev_class s5pv210_sysclass = {
 138         .name   = "s5pv210-core",
 139 };
 140
 141 static struct sys_device s5pv210_sysdev = {
 142         .cls    = &s5pv210_sysclass,
 143 };
 144
 145 static int __init s5pv210_core_init(void)
 146 {
 147         return sysdev_class_register(&s5pv210_sysclass);
 148 }
 149
 150 core_initcall(s5pv210_core_init);
 151
 152 int __init s5pv210_init(void)
 153 {
 154         printk(KERN_INFO "S5PV210: Initializing architecture\n");
 155
 156         /* set idle function */
 157         pm_idle = s5pv210_idle;
 158
 159         /* set sw_reset function */
 160         s5p_reset_hook = s5pv210_sw_reset;
 161
 162         return sysdev_register(&s5pv210_sysdev);
 163 }