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/fb-core.h>
  35 #include <plat/s5pv210.h>
  36 #include <plat/iic-core.h>
  37 #include <plat/sdhci.h>
  38
  39 /* Initial IO mappings */
  40
  41 static struct map_desc s5pv210_iodesc[] __initdata = {
  42         {
  43                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  44                 .pfn            = __phys_to_pfn(S5PV210_PA_SYSTIMER),
  45                 .length         = SZ_1M,
  46                 .type           = MT_DEVICE,
  47         }, {
  48                 .virtual        = (unsigned long)VA_VIC2,
  49                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC2),
  50                 .length         = SZ_16K,
  51                 .type           = MT_DEVICE,
  52         }, {
  53                 .virtual        = (unsigned long)VA_VIC3,
  54                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC3),
  55                 .length         = SZ_16K,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = (unsigned long)S5P_VA_SROMC,
  59                 .pfn            = __phys_to_pfn(S5PV210_PA_SROMC),
  60                 .length         = SZ_4K,
  61                 .type           = MT_DEVICE,
  62         }
  63 };
  64
  65 static void s5pv210_idle(void)
  66 {
  67         if (!need_resched())
  68                 cpu_do_idle();
  69
  70         local_irq_enable();
  71 }
  72
  73 /* s5pv210_map_io
  74  *
  75  * register the standard cpu IO areas
  76 */
  77
  78 void __init s5pv210_map_io(void)
  79 {
  80 #ifdef CONFIG_S3C_DEV_ADC
  81         s3c_device_adc.name     = "s3c64xx-adc";
  82 #endif
  83
  84         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
  85
  86         /* initialise device information early */
  87         s5pv210_default_sdhci0();
  88         s5pv210_default_sdhci1();
  89         s5pv210_default_sdhci2();
  90
  91         /* the i2c devices are directly compatible with s3c2440 */
  92         s3c_i2c0_setname("s3c2440-i2c");
  93         s3c_i2c1_setname("s3c2440-i2c");
  94         s3c_i2c2_setname("s3c2440-i2c");
  95
  96         s3c_fb_setname("s5pv210-fb");
  97 }
  98
  99 void __init s5pv210_init_clocks(int xtal)
 100 {
 101         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 102
 103         s3c24xx_register_baseclocks(xtal);
 104         s5p_register_clocks(xtal);
 105         s5pv210_register_clocks();
 106         s5pv210_setup_clocks();
 107 }
 108
 109 void __init s5pv210_init_irq(void)
 110 {
 111         u32 vic[4];     /* S5PV210 supports 4 VIC */
 112
 113         /* All the VICs are fully populated. */
 114         vic[0] = ~0;
 115         vic[1] = ~0;
 116         vic[2] = ~0;
 117         vic[3] = ~0;
 118
 119         s5p_init_irq(vic, ARRAY_SIZE(vic));
 120 }
 121
 122 struct sysdev_class s5pv210_sysclass = {
 123         .name   = "s5pv210-core",
 124 };
 125
 126 static struct sys_device s5pv210_sysdev = {
 127         .cls    = &s5pv210_sysclass,
 128 };
 129
 130 static int __init s5pv210_core_init(void)
 131 {
 132         return sysdev_class_register(&s5pv210_sysclass);
 133 }
 134
 135 core_initcall(s5pv210_core_init);
 136
 137 int __init s5pv210_init(void)
 138 {
 139         printk(KERN_INFO "S5PV210: Initializing architecture\n");
 140
 141         /* set idle function */
 142         pm_idle = s5pv210_idle;
 143
 144         return sysdev_register(&s5pv210_sysdev);
 145 }