arch/arm/mach-s5pc100/cpu.c

   1 /* linux/arch/arm/mach-s5pc100/cpu.c
   2  *
   3  * Copyright 2009 Samsung Electronics Co.
   4  *      Byungho Min <bhmin@samsung.com>
   5  *
   6  * Based on mach-s3c6410/cpu.c
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/list.h>
  17 #include <linux/timer.h>
  18 #include <linux/init.h>
  19 #include <linux/clk.h>
  20 #include <linux/io.h>
  21 #include <linux/sysdev.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/platform_device.h>
  24
  25 #include <asm/proc-fns.h>
  26
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/irq.h>
  30
  31 #include <mach/hardware.h>
  32 #include <mach/map.h>
  33 #include <asm/irq.h>
  34
  35 #include <plat/cpu-freq.h>
  36 #include <plat/regs-serial.h>
  37 #include <plat/regs-power.h>
  38
  39 #include <plat/cpu.h>
  40 #include <plat/devs.h>
  41 #include <plat/clock.h>
  42 #include <plat/sdhci.h>
  43 #include <plat/iic-core.h>
  44 #include <plat/s5pc100.h>
  45
  46 /* Initial IO mappings */
  47
  48 static struct map_desc s5pc100_iodesc[] __initdata = {
  49 };
  50
  51 static void s5pc100_idle(void)
  52 {
  53         unsigned long tmp;
  54
  55         tmp = __raw_readl(S5PC100_PWR_CFG);
  56         tmp &= ~S5PC100_PWRCFG_CFG_DEEP_IDLE;
  57         tmp &= ~S5PC100_PWRCFG_CFG_WFI_MASK;
  58         tmp |= S5PC100_PWRCFG_CFG_WFI_DEEP_IDLE;
  59         __raw_writel(tmp, S5PC100_PWR_CFG);
  60
  61         tmp = __raw_readl(S5PC100_OTHERS);
  62         tmp |= S5PC100_PMU_INT_DISABLE;
  63         __raw_writel(tmp, S5PC100_OTHERS);
  64
  65         cpu_do_idle();
  66 }
  67
  68 /* s5pc100_map_io
  69  *
  70  * register the standard cpu IO areas
  71 */
  72
  73 void __init s5pc100_map_io(void)
  74 {
  75         iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
  76
  77         /* initialise device information early */
  78         s5pc100_default_sdhci0();
  79         s5pc100_default_sdhci1();
  80         s5pc100_default_sdhci2();
  81
  82         /* the i2c devices are directly compatible with s3c2440 */
  83         s3c_i2c0_setname("s3c2440-i2c");
  84         s3c_i2c1_setname("s3c2440-i2c");
  85 }
  86
  87 void __init s5pc100_init_clocks(int xtal)
  88 {
  89         printk(KERN_DEBUG "%s: initialising clocks\n", __func__);
  90         s3c24xx_register_baseclocks(xtal);
  91         s5pc1xx_register_clocks();
  92         s5pc100_register_clocks();
  93         s5pc100_setup_clocks();
  94 }
  95
  96 void __init s5pc100_init_irq(void)
  97 {
  98         u32 vic_valid[] = {~0, ~0, ~0};
  99
 100         /* VIC0, VIC1, and VIC2 are fully populated. */
 101         s5pc1xx_init_irq(vic_valid, ARRAY_SIZE(vic_valid));
 102 }
 103
 104 struct sysdev_class s5pc100_sysclass = {
 105         .name   = "s5pc100-core",
 106 };
 107
 108 static struct sys_device s5pc100_sysdev = {
 109         .cls    = &s5pc100_sysclass,
 110 };
 111
 112 static int __init s5pc100_core_init(void)
 113 {
 114         return sysdev_class_register(&s5pc100_sysclass);
 115 }
 116
 117 core_initcall(s5pc100_core_init);
 118
 119 int __init s5pc100_init(void)
 120 {
 121         printk(KERN_DEBUG "S5PC100: Initialising architecture\n");
 122
 123         s5pc1xx_idle = s5pc100_idle;
 124
 125         return sysdev_register(&s5pc100_sysdev);
 126 }