arch/arm/mach-s5p6440/cpu.c

   1 /* linux/arch/arm/mach-s5p6440/cpu.c
   2  *
   3  * Copyright (c) 2009-2010 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/clk.h>
  18 #include <linux/io.h>
  19 #include <linux/sysdev.h>
  20 #include <linux/serial_core.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
  30 #include <mach/hardware.h>
  31 #include <mach/map.h>
  32 #include <asm/irq.h>
  33
  34 #include <plat/regs-serial.h>
  35 #include <mach/regs-clock.h>
  36
  37 #include <plat/cpu.h>
  38 #include <plat/devs.h>
  39 #include <plat/clock.h>
  40 #include <plat/s5p6440.h>
  41 #include <plat/adc-core.h>
  42
  43 /* Initial IO mappings */
  44
  45 static struct map_desc s5p6440_iodesc[] __initdata = {
  46         {
  47                 .virtual        = (unsigned long)S5P_VA_GPIO,
  48                 .pfn            = __phys_to_pfn(S5P6440_PA_GPIO),
  49                 .length         = SZ_4K,
  50                 .type           = MT_DEVICE,
  51         }, {
  52                 .virtual        = (unsigned long)VA_VIC0,
  53                 .pfn            = __phys_to_pfn(S5P6440_PA_VIC0),
  54                 .length         = SZ_16K,
  55                 .type           = MT_DEVICE,
  56         }, {
  57                 .virtual        = (unsigned long)VA_VIC1,
  58                 .pfn            = __phys_to_pfn(S5P6440_PA_VIC1),
  59                 .length         = SZ_16K,
  60                 .type           = MT_DEVICE,
  61         }, {
  62                 .virtual        = (unsigned long)S3C_VA_UART,
  63                 .pfn            = __phys_to_pfn(S3C_PA_UART),
  64                 .length         = SZ_512K,
  65                 .type           = MT_DEVICE,
  66         }
  67 };
  68
  69 static void s5p6440_idle(void)
  70 {
  71         unsigned long val;
  72
  73         if (!need_resched()) {
  74                 val = __raw_readl(S5P_PWR_CFG);
  75                 val &= ~(0x3<<5);
  76                 val |= (0x1<<5);
  77                 __raw_writel(val, S5P_PWR_CFG);
  78
  79                 cpu_do_idle();
  80         }
  81         local_irq_enable();
  82 }
  83
  84 /*
  85  * s5p6440_map_io
  86  *
  87  * register the standard cpu IO areas
  88  */
  89
  90 void __init s5p6440_map_io(void)
  91 {
  92         /* initialize any device information early */
  93         s3c_adc_setname("s3c64xx-adc");
  94
  95         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
  96 }
  97
  98 void __init s5p6440_init_clocks(int xtal)
  99 {
 100         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 101
 102         s3c24xx_register_baseclocks(xtal);
 103         s5p_register_clocks(xtal);
 104         s5p6440_register_clocks();
 105         s5p6440_setup_clocks();
 106 }
 107
 108 void __init s5p6440_init_irq(void)
 109 {
 110         /* S5P6440 supports only 2 VIC */
 111         u32 vic[2];
 112
 113         /*
 114          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 115          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 116          */
 117         vic[0] = 0xff800ae7;
 118         vic[1] = 0xffbf23e5;
 119
 120         s5p_init_irq(vic, ARRAY_SIZE(vic));
 121 }
 122
 123 struct sysdev_class s5p6440_sysclass = {
 124         .name   = "s5p6440-core",
 125 };
 126
 127 static struct sys_device s5p6440_sysdev = {
 128         .cls    = &s5p6440_sysclass,
 129 };
 130
 131 static int __init s5p6440_core_init(void)
 132 {
 133         return sysdev_class_register(&s5p6440_sysclass);
 134 }
 135
 136 core_initcall(s5p6440_core_init);
 137
 138 int __init s5p6440_init(void)
 139 {
 140         printk(KERN_INFO "S5P6440: Initializing architecture\n");
 141
 142         /* set idle function */
 143         pm_idle = s5p6440_idle;
 144
 145         return sysdev_register(&s5p6440_sysdev);
 146 }