arch/arm/mach-rpc/riscpc.c

   1 /*
   2  *  linux/arch/arm/mach-rpc/riscpc.c
   3  *
   4  *  Copyright (C) 1998-2001 Russell King
   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  *  Architecture specific fixups.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/tty.h>
  14 #include <linux/delay.h>
  15 #include <linux/pm.h>
  16 #include <linux/init.h>
  17 #include <linux/sched.h>
  18 #include <linux/device.h>
  19 #include <linux/serial_8250.h>
  20 #include <linux/ata_platform.h>
  21 #include <linux/io.h>
  22 #include <linux/i2c.h>
  23
  24 #include <asm/elf.h>
  25 #include <asm/mach-types.h>
  26 #include <mach/hardware.h>
  27 #include <asm/page.h>
  28 #include <asm/domain.h>
  29 #include <asm/setup.h>
  30
  31 #include <asm/mach/map.h>
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/time.h>
  34
  35 extern void rpc_init_irq(void);
  36
  37 unsigned int vram_size;
  38 unsigned int memc_ctrl_reg;
  39 unsigned int number_mfm_drives;
  40
  41 static int __init parse_tag_acorn(const struct tag *tag)
  42 {
  43         memc_ctrl_reg = tag->u.acorn.memc_control_reg;
  44         number_mfm_drives = tag->u.acorn.adfsdrives;
  45
  46         switch (tag->u.acorn.vram_pages) {
  47         case 512:
  48                 vram_size += PAGE_SIZE * 256;
  49         case 256:
  50                 vram_size += PAGE_SIZE * 256;
  51         default:
  52                 break;
  53         }
  54 #if 0
  55         if (vram_size) {
  56                 desc->video_start = 0x02000000;
  57                 desc->video_end   = 0x02000000 + vram_size;
  58         }
  59 #endif
  60         return 0;
  61 }
  62
  63 __tagtable(ATAG_ACORN, parse_tag_acorn);
  64
  65 static struct map_desc rpc_io_desc[] __initdata = {
  66         {       /* VRAM         */
  67                 .virtual        =  SCREEN_BASE,
  68                 .pfn            = __phys_to_pfn(SCREEN_START),
  69                 .length         =       2*1048576,
  70                 .type           = MT_DEVICE
  71         }, {    /* IO space     */
  72                 .virtual        =  (u32)IO_BASE,
  73                 .pfn            = __phys_to_pfn(IO_START),
  74                 .length         =       IO_SIZE  ,
  75                 .type           = MT_DEVICE
  76         }, {    /* EASI space   */
  77                 .virtual        = (unsigned long)EASI_BASE,
  78                 .pfn            = __phys_to_pfn(EASI_START),
  79                 .length         = EASI_SIZE,
  80                 .type           = MT_DEVICE
  81         }
  82 };
  83
  84 static void __init rpc_map_io(void)
  85 {
  86         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
  87
  88         /*
  89          * Turn off floppy.
  90          */
  91         writeb(0xc, PCIO_BASE + (0x3f2 << 2));
  92
  93         /*
  94          * RiscPC can't handle half-word loads and stores
  95          */
  96         elf_hwcap &= ~HWCAP_HALF;
  97 }
  98
  99 static struct resource acornfb_resources[] = {
 100         {       /* VIDC */
 101                 .start          = 0x03400000,
 102                 .end            = 0x035fffff,
 103                 .flags          = IORESOURCE_MEM,
 104         }, {
 105                 .start          = IRQ_VSYNCPULSE,
 106                 .end            = IRQ_VSYNCPULSE,
 107                 .flags          = IORESOURCE_IRQ,
 108         },
 109 };
 110
 111 static struct platform_device acornfb_device = {
 112         .name                   = "acornfb",
 113         .id                     = -1,
 114         .dev                    = {
 115                 .coherent_dma_mask = 0xffffffff,
 116         },
 117         .num_resources          = ARRAY_SIZE(acornfb_resources),
 118         .resource               = acornfb_resources,
 119 };
 120
 121 static struct resource iomd_resources[] = {
 122         {
 123                 .start          = 0x03200000,
 124                 .end            = 0x0320ffff,
 125                 .flags          = IORESOURCE_MEM,
 126         },
 127 };
 128
 129 static struct platform_device iomd_device = {
 130         .name                   = "iomd",
 131         .id                     = -1,
 132         .num_resources          = ARRAY_SIZE(iomd_resources),
 133         .resource               = iomd_resources,
 134 };
 135
 136 static struct platform_device kbd_device = {
 137         .name                   = "kart",
 138         .id                     = -1,
 139         .dev                    = {
 140                 .parent         = &iomd_device.dev,
 141         },
 142 };
 143
 144 static struct plat_serial8250_port serial_platform_data[] = {
 145         {
 146                 .mapbase        = 0x03010fe0,
 147                 .irq            = 10,
 148                 .uartclk        = 1843200,
 149                 .regshift       = 2,
 150                 .iotype         = UPIO_MEM,
 151                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
 152         },
 153         { },
 154 };
 155
 156 static struct platform_device serial_device = {
 157         .name                   = "serial8250",
 158         .id                     = PLAT8250_DEV_PLATFORM,
 159         .dev                    = {
 160                 .platform_data  = serial_platform_data,
 161         },
 162 };
 163
 164 static struct pata_platform_info pata_platform_data = {
 165         .ioport_shift           = 2,
 166 };
 167
 168 static struct resource pata_resources[] = {
 169         [0] = {
 170                 .start          = 0x030107c0,
 171                 .end            = 0x030107df,
 172                 .flags          = IORESOURCE_MEM,
 173         },
 174         [1] = {
 175                 .start          = 0x03010fd8,
 176                 .end            = 0x03010fdb,
 177                 .flags          = IORESOURCE_MEM,
 178         },
 179         [2] = {
 180                 .start          = IRQ_HARDDISK,
 181                 .end            = IRQ_HARDDISK,
 182                 .flags          = IORESOURCE_IRQ,
 183         },
 184 };
 185
 186 static struct platform_device pata_device = {
 187         .name                   = "pata_platform",
 188         .id                     = -1,
 189         .num_resources          = ARRAY_SIZE(pata_resources),
 190         .resource               = pata_resources,
 191         .dev                    = {
 192                 .platform_data  = &pata_platform_data,
 193                 .coherent_dma_mask = ~0,        /* grumble */
 194         },
 195 };
 196
 197 static struct platform_device *devs[] __initdata = {
 198         &iomd_device,
 199         &kbd_device,
 200         &serial_device,
 201         &acornfb_device,
 202         &pata_device,
 203 };
 204
 205 static struct i2c_board_info i2c_rtc = {
 206         I2C_BOARD_INFO("pcf8583", 0x50)
 207 };
 208
 209 static int __init rpc_init(void)
 210 {
 211         i2c_register_board_info(0, &i2c_rtc, 1);
 212         return platform_add_devices(devs, ARRAY_SIZE(devs));
 213 }
 214
 215 arch_initcall(rpc_init);
 216
 217 extern struct sys_timer ioc_timer;
 218
 219 MACHINE_START(RISCPC, "Acorn-RiscPC")
 220         /* Maintainer: Russell King */
 221         .boot_params    = 0x10000100,
 222         .reserve_lp0    = 1,
 223         .reserve_lp1    = 1,
 224         .map_io         = rpc_map_io,
 225         .init_irq       = rpc_init_irq,
 226         .timer          = &ioc_timer,
 227 MACHINE_END