arch/arm/mach-s5pc100/cpu.c

   1 /* linux/arch/arm/mach-s5pc100/cpu.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Copyright 2009 Samsung Electronics Co.
   7  *      Byungho Min <bhmin@samsung.com>
   8  *
   9  * Based on mach-s3c6410/cpu.c
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14 */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/timer.h>
  21 #include <linux/init.h>
  22 #include <linux/clk.h>
  23 #include <linux/io.h>
  24 #include <linux/sysdev.h>
  25 #include <linux/serial_core.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/sched.h>
  28
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/irq.h>
  32
  33 #include <asm/proc-fns.h>
  34
  35 #include <mach/hardware.h>
  36 #include <mach/map.h>
  37 #include <asm/irq.h>
  38
  39 #include <plat/regs-serial.h>
  40 #include <mach/regs-clock.h>
  41
  42 #include <plat/cpu.h>
  43 #include <plat/devs.h>
  44 #include <plat/clock.h>
  45 #include <plat/ata-core.h>
  46 #include <plat/iic-core.h>
  47 #include <plat/sdhci.h>
  48 #include <plat/adc-core.h>
  49 #include <plat/onenand-core.h>
  50 #include <plat/fb-core.h>
  51
  52 #include <plat/s5pc100.h>
  53
  54 /* Initial IO mappings */
  55
  56 static struct map_desc s5pc100_iodesc[] __initdata = {
  57         {
  58                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  59                 .pfn            = __phys_to_pfn(S5PC100_PA_SYSTIMER),
  60                 .length         = SZ_16K,
  61                 .type           = MT_DEVICE,
  62         }, {
  63                 .virtual        = (unsigned long)S5P_VA_GPIO,
  64                 .pfn            = __phys_to_pfn(S5PC100_PA_GPIO),
  65                 .length         = SZ_4K,
  66                 .type           = MT_DEVICE,
  67         }, {
  68                 .virtual        = (unsigned long)VA_VIC0,
  69                 .pfn            = __phys_to_pfn(S5PC100_PA_VIC0),
  70                 .length         = SZ_16K,
  71                 .type           = MT_DEVICE,
  72         }, {
  73                 .virtual        = (unsigned long)VA_VIC1,
  74                 .pfn            = __phys_to_pfn(S5PC100_PA_VIC1),
  75                 .length         = SZ_16K,
  76                 .type           = MT_DEVICE,
  77         }, {
  78                 .virtual        = (unsigned long)VA_VIC2,
  79                 .pfn            = __phys_to_pfn(S5PC100_PA_VIC2),
  80                 .length         = SZ_16K,
  81                 .type           = MT_DEVICE,
  82         }, {
  83                 .virtual        = (unsigned long)S3C_VA_UART,
  84                 .pfn            = __phys_to_pfn(S3C_PA_UART),
  85                 .length         = SZ_512K,
  86                 .type           = MT_DEVICE,
  87         }, {
  88                 .virtual        = (unsigned long)S5PC100_VA_OTHERS,
  89                 .pfn            = __phys_to_pfn(S5PC100_PA_OTHERS),
  90                 .length         = SZ_4K,
  91                 .type           = MT_DEVICE,
  92         }
  93 };
  94
  95 static void s5pc100_idle(void)
  96 {
  97         if (!need_resched())
  98                 cpu_do_idle();
  99
 100         local_irq_enable();
 101 }
 102
 103 /* s5pc100_map_io
 104  *
 105  * register the standard cpu IO areas
 106 */
 107
 108 void __init s5pc100_map_io(void)
 109 {
 110         iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
 111
 112         /* initialise device information early */
 113         s5pc100_default_sdhci0();
 114         s5pc100_default_sdhci1();
 115         s5pc100_default_sdhci2();
 116
 117         s3c_adc_setname("s3c64xx-adc");
 118
 119         /* the i2c devices are directly compatible with s3c2440 */
 120         s3c_i2c0_setname("s3c2440-i2c");
 121         s3c_i2c1_setname("s3c2440-i2c");
 122
 123         s3c_onenand_setname("s5pc100-onenand");
 124         s3c_fb_setname("s5pc100-fb");
 125         s3c_cfcon_setname("s5pc100-pata");
 126 }
 127
 128 void __init s5pc100_init_clocks(int xtal)
 129 {
 130         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 131
 132         s3c24xx_register_baseclocks(xtal);
 133         s5p_register_clocks(xtal);
 134         s5pc100_register_clocks();
 135         s5pc100_setup_clocks();
 136 }
 137
 138 void __init s5pc100_init_irq(void)
 139 {
 140         u32 vic[] = {~0, ~0, ~0};
 141
 142         /* VIC0, VIC1, and VIC2 are fully populated. */
 143         s5p_init_irq(vic, ARRAY_SIZE(vic));
 144 }
 145
 146 static struct sysdev_class s5pc100_sysclass = {
 147         .name   = "s5pc100-core",
 148 };
 149
 150 static struct sys_device s5pc100_sysdev = {
 151         .cls    = &s5pc100_sysclass,
 152 };
 153
 154 static int __init s5pc100_core_init(void)
 155 {
 156         return sysdev_class_register(&s5pc100_sysclass);
 157 }
 158
 159 core_initcall(s5pc100_core_init);
 160
 161 int __init s5pc100_init(void)
 162 {
 163         printk(KERN_INFO "S5PC100: Initializing architecture\n");
 164
 165         /* set idle function */
 166         pm_idle = s5pc100_idle;
 167
 168         return sysdev_register(&s5pc100_sysdev);
 169 }