arch/arm/mach-s3c64xx/cpu.c

   1 /* linux/arch/arm/plat-s3c64xx/cpu.c
   2  *
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * S3C64XX CPU Support
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/ioport.h>
  19 #include <linux/sysdev.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/io.h>
  23 #include <linux/dma-mapping.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/map.h>
  27
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30
  31 #include <plat/regs-serial.h>
  32
  33 #include <plat/cpu.h>
  34 #include <plat/devs.h>
  35 #include <plat/clock.h>
  36
  37 #include <mach/s3c6400.h>
  38 #include <mach/s3c6410.h>
  39
  40 /* table of supported CPUs */
  41
  42 static const char name_s3c6400[] = "S3C6400";
  43 static const char name_s3c6410[] = "S3C6410";
  44
  45 static struct cpu_table cpu_ids[] __initdata = {
  46         {
  47                 .idcode         = S3C6400_CPU_ID,
  48                 .idmask         = S3C64XX_CPU_MASK,
  49                 .map_io         = s3c6400_map_io,
  50                 .init_clocks    = s3c6400_init_clocks,
  51                 .init_uarts     = s3c6400_init_uarts,
  52                 .init           = s3c6400_init,
  53                 .name           = name_s3c6400,
  54         }, {
  55                 .idcode         = S3C6410_CPU_ID,
  56                 .idmask         = S3C64XX_CPU_MASK,
  57                 .map_io         = s3c6410_map_io,
  58                 .init_clocks    = s3c6410_init_clocks,
  59                 .init_uarts     = s3c6410_init_uarts,
  60                 .init           = s3c6410_init,
  61                 .name           = name_s3c6410,
  62         },
  63 };
  64
  65 /* minimal IO mapping */
  66
  67 /* see notes on uart map in arch/arm/mach-s3c6400/include/mach/debug-macro.S */
  68 #define UART_OFFS (S3C_PA_UART & 0xfffff)
  69
  70 static struct map_desc s3c_iodesc[] __initdata = {
  71         {
  72                 .virtual        = (unsigned long)S3C_VA_SYS,
  73                 .pfn            = __phys_to_pfn(S3C64XX_PA_SYSCON),
  74                 .length         = SZ_4K,
  75                 .type           = MT_DEVICE,
  76         }, {
  77                 .virtual        = (unsigned long)S3C_VA_MEM,
  78                 .pfn            = __phys_to_pfn(S3C64XX_PA_SROM),
  79                 .length         = SZ_4K,
  80                 .type           = MT_DEVICE,
  81         }, {
  82                 .virtual        = (unsigned long)(S3C_VA_UART + UART_OFFS),
  83                 .pfn            = __phys_to_pfn(S3C_PA_UART),
  84                 .length         = SZ_4K,
  85                 .type           = MT_DEVICE,
  86         }, {
  87                 .virtual        = (unsigned long)VA_VIC0,
  88                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC0),
  89                 .length         = SZ_16K,
  90                 .type           = MT_DEVICE,
  91         }, {
  92                 .virtual        = (unsigned long)VA_VIC1,
  93                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC1),
  94                 .length         = SZ_16K,
  95                 .type           = MT_DEVICE,
  96         }, {
  97                 .virtual        = (unsigned long)S3C_VA_TIMER,
  98                 .pfn            = __phys_to_pfn(S3C_PA_TIMER),
  99                 .length         = SZ_16K,
 100                 .type           = MT_DEVICE,
 101         }, {
 102                 .virtual        = (unsigned long)S3C64XX_VA_GPIO,
 103                 .pfn            = __phys_to_pfn(S3C64XX_PA_GPIO),
 104                 .length         = SZ_4K,
 105                 .type           = MT_DEVICE,
 106         }, {
 107                 .virtual        = (unsigned long)S3C64XX_VA_MODEM,
 108                 .pfn            = __phys_to_pfn(S3C64XX_PA_MODEM),
 109                 .length         = SZ_4K,
 110                 .type           = MT_DEVICE,
 111         }, {
 112                 .virtual        = (unsigned long)S3C_VA_WATCHDOG,
 113                 .pfn            = __phys_to_pfn(S3C64XX_PA_WATCHDOG),
 114                 .length         = SZ_4K,
 115                 .type           = MT_DEVICE,
 116         }, {
 117                 .virtual        = (unsigned long)S3C_VA_USB_HSPHY,
 118                 .pfn            = __phys_to_pfn(S3C64XX_PA_USB_HSPHY),
 119                 .length         = SZ_1K,
 120                 .type           = MT_DEVICE,
 121         },
 122 };
 123
 124
 125 struct sysdev_class s3c64xx_sysclass = {
 126         .name   = "s3c64xx-core",
 127 };
 128
 129 static struct sys_device s3c64xx_sysdev = {
 130         .cls    = &s3c64xx_sysclass,
 131 };
 132
 133 /* uart registration process */
 134
 135 void __init s3c6400_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 136 {
 137         s3c24xx_init_uartdevs("s3c6400-uart", s3c64xx_uart_resources, cfg, no);
 138 }
 139
 140 /* read cpu identification code */
 141
 142 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 143 {
 144         /* initialise the io descriptors we need for initialisation */
 145         iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
 146         iotable_init(mach_desc, size);
 147         init_consistent_dma_size(SZ_8M);
 148
 149         /* detect cpu id */
 150         s3c64xx_init_cpu();
 151
 152         s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 153 }
 154
 155 static __init int s3c64xx_sysdev_init(void)
 156 {
 157         sysdev_class_register(&s3c64xx_sysclass);
 158         return sysdev_register(&s3c64xx_sysdev);
 159 }
 160
 161 core_initcall(s3c64xx_sysdev_init);