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
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26 #include <asm/proc-fns.h>
  27 #include <asm/irq.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/map.h>
  31 #include <mach/regs-clock.h>
  32
  33 #include <plat/regs-serial.h>
  34 #include <plat/cpu.h>
  35 #include <plat/devs.h>
  36 #include <plat/clock.h>
  37 #include <plat/s5p6440.h>
  38 #include <plat/s5p6450.h>
  39 #include <plat/adc-core.h>
  40
  41 /* Initial IO mappings */
  42
  43 static struct map_desc s5p64x0_iodesc[] __initdata = {
  44         {
  45                 .virtual        = (unsigned long)S5P_VA_GPIO,
  46                 .pfn            = __phys_to_pfn(S5P64X0_PA_GPIO),
  47                 .length         = SZ_4K,
  48                 .type           = MT_DEVICE,
  49         }, {
  50                 .virtual        = (unsigned long)VA_VIC0,
  51                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC0),
  52                 .length         = SZ_16K,
  53                 .type           = MT_DEVICE,
  54         }, {
  55                 .virtual        = (unsigned long)VA_VIC1,
  56                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC1),
  57                 .length         = SZ_16K,
  58                 .type           = MT_DEVICE,
  59         },
  60 };
  61
  62 static struct map_desc s5p6440_iodesc[] __initdata = {
  63         {
  64                 .virtual        = (unsigned long)S3C_VA_UART,
  65                 .pfn            = __phys_to_pfn(S5P6440_PA_UART(0)),
  66                 .length         = SZ_4K,
  67                 .type           = MT_DEVICE,
  68         },
  69 };
  70
  71 static struct map_desc s5p6450_iodesc[] __initdata = {
  72         {
  73                 .virtual        = (unsigned long)S3C_VA_UART,
  74                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(0)),
  75                 .length         = SZ_512K,
  76                 .type           = MT_DEVICE,
  77         }, {
  78                 .virtual        = (unsigned long)S3C_VA_UART + SZ_512K,
  79                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(5)),
  80                 .length         = SZ_4K,
  81                 .type           = MT_DEVICE,
  82         },
  83 };
  84
  85 static void s5p64x0_idle(void)
  86 {
  87         unsigned long val;
  88
  89         if (!need_resched()) {
  90                 val = __raw_readl(S5P64X0_PWR_CFG);
  91                 val &= ~(0x3 << 5);
  92                 val |= (0x1 << 5);
  93                 __raw_writel(val, S5P64X0_PWR_CFG);
  94
  95                 cpu_do_idle();
  96         }
  97         local_irq_enable();
  98 }
  99
 100 /*
 101  * s5p64x0_map_io
 102  *
 103  * register the standard CPU IO areas
 104  */
 105
 106 void __init s5p6440_map_io(void)
 107 {
 108         /* initialize any device information early */
 109         s3c_adc_setname("s3c64x0-adc");
 110
 111         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 112         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 113 }
 114
 115 void __init s5p6450_map_io(void)
 116 {
 117         /* initialize any device information early */
 118         s3c_adc_setname("s3c64x0-adc");
 119
 120         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 121         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 122 }
 123
 124 /*
 125  * s5p64x0_init_clocks
 126  *
 127  * register and setup the CPU clocks
 128  */
 129
 130 void __init s5p6440_init_clocks(int xtal)
 131 {
 132         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 133
 134         s3c24xx_register_baseclocks(xtal);
 135         s5p_register_clocks(xtal);
 136         s5p6440_register_clocks();
 137         s5p6440_setup_clocks();
 138 }
 139
 140 void __init s5p6450_init_clocks(int xtal)
 141 {
 142         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 143
 144         s3c24xx_register_baseclocks(xtal);
 145         s5p_register_clocks(xtal);
 146         s5p6450_register_clocks();
 147         s5p6450_setup_clocks();
 148 }
 149
 150 /*
 151  * s5p64x0_init_irq
 152  *
 153  * register the CPU interrupts
 154  */
 155
 156 void __init s5p6440_init_irq(void)
 157 {
 158         /* S5P6440 supports 2 VIC */
 159         u32 vic[2];
 160
 161         /*
 162          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 163          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 164          */
 165         vic[0] = 0xff800ae7;
 166         vic[1] = 0xffbf23e5;
 167
 168         s5p_init_irq(vic, ARRAY_SIZE(vic));
 169 }
 170
 171 void __init s5p6450_init_irq(void)
 172 {
 173         /* S5P6450 supports only 2 VIC */
 174         u32 vic[2];
 175
 176         /*
 177          * VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
 178          * VIC1 is missing IRQ VIC1[12, 14, 23]
 179          */
 180         vic[0] = 0xff9f1fff;
 181         vic[1] = 0xff7fafff;
 182
 183         s5p_init_irq(vic, ARRAY_SIZE(vic));
 184 }
 185
 186 struct sysdev_class s5p64x0_sysclass = {
 187         .name   = "s5p64x0-core",
 188 };
 189
 190 static struct sys_device s5p64x0_sysdev = {
 191         .cls    = &s5p64x0_sysclass,
 192 };
 193
 194 static int __init s5p64x0_core_init(void)
 195 {
 196         return sysdev_class_register(&s5p64x0_sysclass);
 197 }
 198 core_initcall(s5p64x0_core_init);
 199
 200 int __init s5p64x0_init(void)
 201 {
 202         printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
 203
 204         /* set idle function */
 205         pm_idle = s5p64x0_idle;
 206
 207         return sysdev_register(&s5p64x0_sysdev);
 208 }