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/hardware/iomd.h>
  28 #include <asm/page.h>
  29 #include <asm/domain.h>
  30 #include <asm/setup.h>
  31 #include <asm/system_misc.h>
  32
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/arch.h>
  35 #include <asm/mach/time.h>
  36
  37 extern void rpc_init_irq(void);
  38
  39 unsigned int vram_size;
  40 unsigned int memc_ctrl_reg;
  41 unsigned int number_mfm_drives;
  42
  43 static int __init parse_tag_acorn(const struct tag *tag)
  44 {
  45         memc_ctrl_reg = tag->u.acorn.memc_control_reg;
  46         number_mfm_drives = tag->u.acorn.adfsdrives;
  47
  48         switch (tag->u.acorn.vram_pages) {
  49         case 512:
  50                 vram_size += PAGE_SIZE * 256;
  51         case 256:
  52                 vram_size += PAGE_SIZE * 256;
  53         default:
  54                 break;
  55         }
  56 #if 0
  57         if (vram_size) {
  58                 desc->video_start = 0x02000000;
  59                 desc->video_end   = 0x02000000 + vram_size;
  60         }
  61 #endif
  62         return 0;
  63 }
  64
  65 __tagtable(ATAG_ACORN, parse_tag_acorn);
  66
  67 static struct map_desc rpc_io_desc[] __initdata = {
  68         {       /* VRAM         */
  69                 .virtual        =  SCREEN_BASE,
  70                 .pfn            = __phys_to_pfn(SCREEN_START),
  71                 .length         =       2*1048576,
  72                 .type           = MT_DEVICE
  73         }, {    /* IO space     */
  74                 .virtual        =  (u32)IO_BASE,
  75                 .pfn            = __phys_to_pfn(IO_START),
  76                 .length         =       IO_SIZE  ,
  77                 .type           = MT_DEVICE
  78         }, {    /* EASI space   */
  79                 .virtual        = (unsigned long)EASI_BASE,
  80                 .pfn            = __phys_to_pfn(EASI_START),
  81                 .length         = EASI_SIZE,
  82                 .type           = MT_DEVICE
  83         }
  84 };
  85
  86 static void __init rpc_map_io(void)
  87 {
  88         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
  89
  90         /*
  91          * Turn off floppy.
  92          */
  93         writeb(0xc, PCIO_BASE + (0x3f2 << 2));
  94
  95         /*
  96          * RiscPC can't handle half-word loads and stores
  97          */
  98         elf_hwcap &= ~HWCAP_HALF;
  99 }
 100
 101 static struct resource acornfb_resources[] = {
 102         {       /* VIDC */
 103                 .start          = 0x03400000,
 104                 .end            = 0x035fffff,
 105                 .flags          = IORESOURCE_MEM,
 106         }, {
 107                 .start          = IRQ_VSYNCPULSE,
 108                 .end            = IRQ_VSYNCPULSE,
 109                 .flags          = IORESOURCE_IRQ,
 110         },
 111 };
 112
 113 static struct platform_device acornfb_device = {
 114         .name                   = "acornfb",
 115         .id                     = -1,
 116         .dev                    = {
 117                 .coherent_dma_mask = 0xffffffff,
 118         },
 119         .num_resources          = ARRAY_SIZE(acornfb_resources),
 120         .resource               = acornfb_resources,
 121 };
 122
 123 static struct resource iomd_resources[] = {
 124         {
 125                 .start          = 0x03200000,
 126                 .end            = 0x0320ffff,
 127                 .flags          = IORESOURCE_MEM,
 128         },
 129 };
 130
 131 static struct platform_device iomd_device = {
 132         .name                   = "iomd",
 133         .id                     = -1,
 134         .num_resources          = ARRAY_SIZE(iomd_resources),
 135         .resource               = iomd_resources,
 136 };
 137
 138 static struct platform_device kbd_device = {
 139         .name                   = "kart",
 140         .id                     = -1,
 141         .dev                    = {
 142                 .parent         = &iomd_device.dev,
 143         },
 144 };
 145
 146 static struct plat_serial8250_port serial_platform_data[] = {
 147         {
 148                 .mapbase        = 0x03010fe0,
 149                 .irq            = 10,
 150                 .uartclk        = 1843200,
 151                 .regshift       = 2,
 152                 .iotype         = UPIO_MEM,
 153                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
 154         },
 155         { },
 156 };
 157
 158 static struct platform_device serial_device = {
 159         .name                   = "serial8250",
 160         .id                     = PLAT8250_DEV_PLATFORM,
 161         .dev                    = {
 162                 .platform_data  = serial_platform_data,
 163         },
 164 };
 165
 166 static struct pata_platform_info pata_platform_data = {
 167         .ioport_shift           = 2,
 168 };
 169
 170 static struct resource pata_resources[] = {
 171         [0] = {
 172                 .start          = 0x030107c0,
 173                 .end            = 0x030107df,
 174                 .flags          = IORESOURCE_MEM,
 175         },
 176         [1] = {
 177                 .start          = 0x03010fd8,
 178                 .end            = 0x03010fdb,
 179                 .flags          = IORESOURCE_MEM,
 180         },
 181         [2] = {
 182                 .start          = IRQ_HARDDISK,
 183                 .end            = IRQ_HARDDISK,
 184                 .flags          = IORESOURCE_IRQ,
 185         },
 186 };
 187
 188 static struct platform_device pata_device = {
 189         .name                   = "pata_platform",
 190         .id                     = -1,
 191         .num_resources          = ARRAY_SIZE(pata_resources),
 192         .resource               = pata_resources,
 193         .dev                    = {
 194                 .platform_data  = &pata_platform_data,
 195                 .coherent_dma_mask = ~0,        /* grumble */
 196         },
 197 };
 198
 199 static struct platform_device *devs[] __initdata = {
 200         &iomd_device,
 201         &kbd_device,
 202         &serial_device,
 203         &acornfb_device,
 204         &pata_device,
 205 };
 206
 207 static struct i2c_board_info i2c_rtc = {
 208         I2C_BOARD_INFO("pcf8583", 0x50)
 209 };
 210
 211 static int __init rpc_init(void)
 212 {
 213         i2c_register_board_info(0, &i2c_rtc, 1);
 214         return platform_add_devices(devs, ARRAY_SIZE(devs));
 215 }
 216
 217 arch_initcall(rpc_init);
 218
 219 static void rpc_restart(char mode, const char *cmd)
 220 {
 221         iomd_writeb(0, IOMD_ROMCR0);
 222
 223         /*
 224          * Jump into the ROM
 225          */
 226         soft_restart(0);
 227 }
 228
 229 extern struct sys_timer ioc_timer;
 230
 231 MACHINE_START(RISCPC, "Acorn-RiscPC")
 232         /* Maintainer: Russell King */
 233         .atag_offset    = 0x100,
 234         .reserve_lp0    = 1,
 235         .reserve_lp1    = 1,
 236         .map_io         = rpc_map_io,
 237         .init_irq       = rpc_init_irq,
 238         .timer          = &ioc_timer,
 239         .restart        = rpc_restart,
 240 MACHINE_END