LXR linux/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 <plat/s3c6400.h>
  38#include <plat/s3c6410.h>
  39
  40/* table of supported CPUs */
  41
  42static const char name_s3c6400[] = "S3C6400";
  43static const char name_s3c6410[] = "S3C6410";
  44
  45static 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
  70static 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
 125struct sysdev_class s3c64xx_sysclass = {
 126        .name   = "s3c64xx-core",
 127};
 128
 129static struct sys_device s3c64xx_sysdev = {
 130        .cls    = &s3c64xx_sysclass,
 131};
 132
 133/* uart registration process */
 134
 135void __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
 142void __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
 155static __init int s3c64xx_sysdev_init(void)
 156{
 157        sysdev_class_register(&s3c64xx_sysclass);
 158        return sysdev_register(&s3c64xx_sysdev);
 159}
 160
 161core_initcall(s3c64xx_sysdev_init);
 162