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