arch/arm/mach-s5p64x0/cpu.c

   1 /* linux/arch/arm/mach-s5p64x0/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 #include <asm/proc-fns.h>
  28 #include <asm/irq.h>
  29
  30 #include <mach/hardware.h>
  31 #include <mach/map.h>
  32 #include <mach/regs-clock.h>
  33
  34 #include <plat/regs-serial.h>
  35 #include <plat/cpu.h>
  36 #include <plat/devs.h>
  37 #include <plat/clock.h>
  38 #include <plat/s5p6440.h>
  39 #include <plat/s5p6450.h>
  40 #include <plat/adc-core.h>
  41
  42 /* Initial IO mappings */
  43
  44 static struct map_desc s5p64x0_iodesc[] __initdata = {
  45         {
  46                 .virtual        = (unsigned long)S5P_VA_GPIO,
  47                 .pfn            = __phys_to_pfn(S5P64X0_PA_GPIO),
  48                 .length         = SZ_4K,
  49                 .type           = MT_DEVICE,
  50         }, {
  51                 .virtual        = (unsigned long)VA_VIC0,
  52                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC0),
  53                 .length         = SZ_16K,
  54                 .type           = MT_DEVICE,
  55         }, {
  56                 .virtual        = (unsigned long)VA_VIC1,
  57                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC1),
  58                 .length         = SZ_16K,
  59                 .type           = MT_DEVICE,
  60         },
  61 };
  62
  63 static struct map_desc s5p6440_iodesc[] __initdata = {
  64         {
  65                 .virtual        = (unsigned long)S3C_VA_UART,
  66                 .pfn            = __phys_to_pfn(S5P6440_PA_UART(0)),
  67                 .length         = SZ_4K,
  68                 .type           = MT_DEVICE,
  69         },
  70 };
  71
  72 static struct map_desc s5p6450_iodesc[] __initdata = {
  73         {
  74                 .virtual        = (unsigned long)S3C_VA_UART,
  75                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(0)),
  76                 .length         = SZ_512K,
  77                 .type           = MT_DEVICE,
  78         }, {
  79                 .virtual        = (unsigned long)S3C_VA_UART + SZ_512K,
  80                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(5)),
  81                 .length         = SZ_4K,
  82                 .type           = MT_DEVICE,
  83         },
  84 };
  85
  86 static void s5p64x0_idle(void)
  87 {
  88         unsigned long val;
  89
  90         if (!need_resched()) {
  91                 val = __raw_readl(S5P64X0_PWR_CFG);
  92                 val &= ~(0x3 << 5);
  93                 val |= (0x1 << 5);
  94                 __raw_writel(val, S5P64X0_PWR_CFG);
  95
  96                 cpu_do_idle();
  97         }
  98         local_irq_enable();
  99 }
 100
 101 /*
 102  * s5p64x0_map_io
 103  *
 104  * register the standard CPU IO areas
 105  */
 106
 107 void __init s5p6440_map_io(void)
 108 {
 109         /* initialize any device information early */
 110         s3c_adc_setname("s3c64xx-adc");
 111
 112         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 113         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 114 }
 115
 116 void __init s5p6450_map_io(void)
 117 {
 118         /* initialize any device information early */
 119         s3c_adc_setname("s3c64xx-adc");
 120
 121         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 122         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
 123 }
 124
 125 /*
 126  * s5p64x0_init_clocks
 127  *
 128  * register and setup the CPU clocks
 129  */
 130
 131 void __init s5p6440_init_clocks(int xtal)
 132 {
 133         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 134
 135         s3c24xx_register_baseclocks(xtal);
 136         s5p_register_clocks(xtal);
 137         s5p6440_register_clocks();
 138         s5p6440_setup_clocks();
 139 }
 140
 141 void __init s5p6450_init_clocks(int xtal)
 142 {
 143         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 144
 145         s3c24xx_register_baseclocks(xtal);
 146         s5p_register_clocks(xtal);
 147         s5p6450_register_clocks();
 148         s5p6450_setup_clocks();
 149 }
 150
 151 /*
 152  * s5p64x0_init_irq
 153  *
 154  * register the CPU interrupts
 155  */
 156
 157 void __init s5p6440_init_irq(void)
 158 {
 159         /* S5P6440 supports 2 VIC */
 160         u32 vic[2];
 161
 162         /*
 163          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 164          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 165          */
 166         vic[0] = 0xff800ae7;
 167         vic[1] = 0xffbf23e5;
 168
 169         s5p_init_irq(vic, ARRAY_SIZE(vic));
 170 }
 171
 172 void __init s5p6450_init_irq(void)
 173 {
 174         /* S5P6450 supports only 2 VIC */
 175         u32 vic[2];
 176
 177         /*
 178          * VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
 179          * VIC1 is missing IRQ VIC1[12, 14, 23]
 180          */
 181         vic[0] = 0xff9f1fff;
 182         vic[1] = 0xff7fafff;
 183
 184         s5p_init_irq(vic, ARRAY_SIZE(vic));
 185 }
 186
 187 struct sysdev_class s5p64x0_sysclass = {
 188         .name   = "s5p64x0-core",
 189 };
 190
 191 static struct sys_device s5p64x0_sysdev = {
 192         .cls    = &s5p64x0_sysclass,
 193 };
 194
 195 static int __init s5p64x0_core_init(void)
 196 {
 197         return sysdev_class_register(&s5p64x0_sysclass);
 198 }
 199 core_initcall(s5p64x0_core_init);
 200
 201 int __init s5p64x0_init(void)
 202 {
 203         printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
 204
 205         /* set idle function */
 206         pm_idle = s5p64x0_idle;
 207
 208         return sysdev_register(&s5p64x0_sysdev);
 209 }