release/src-rt-6.x/linux/linux-2.6/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/pata_platform.h>
  21
  22 #include <asm/elf.h>
  23 #include <asm/io.h>
  24 #include <asm/mach-types.h>
  25 #include <asm/hardware.h>
  26 #include <asm/page.h>
  27 #include <asm/domain.h>
  28 #include <asm/setup.h>
  29
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/time.h>
  33
  34 extern void rpc_init_irq(void);
  35
  36 unsigned int vram_size;
  37 unsigned int memc_ctrl_reg;
  38 unsigned int number_mfm_drives;
  39
  40 static int __init parse_tag_acorn(const struct tag *tag)
  41 {
  42         memc_ctrl_reg = tag->u.acorn.memc_control_reg;
  43         number_mfm_drives = tag->u.acorn.adfsdrives;
  44
  45         switch (tag->u.acorn.vram_pages) {
  46         case 512:
  47                 vram_size += PAGE_SIZE * 256;
  48         case 256:
  49                 vram_size += PAGE_SIZE * 256;
  50         default:
  51                 break;
  52         }
  53 #if 0
  54         if (vram_size) {
  55                 desc->video_start = 0x02000000;
  56                 desc->video_end   = 0x02000000 + vram_size;
  57         }
  58 #endif
  59         return 0;
  60 }
  61
  62 __tagtable(ATAG_ACORN, parse_tag_acorn);
  63
  64 static struct map_desc rpc_io_desc[] __initdata = {
  65         {       /* VRAM         */
  66                 .virtual        =  SCREEN_BASE,
  67                 .pfn            = __phys_to_pfn(SCREEN_START),
  68                 .length         =       2*1048576,
  69                 .type           = MT_DEVICE
  70         }, {    /* IO space     */
  71                 .virtual        =  (u32)IO_BASE,
  72                 .pfn            = __phys_to_pfn(IO_START),
  73                 .length         =       IO_SIZE  ,
  74                 .type           = MT_DEVICE
  75         }, {    /* EASI space   */
  76                 .virtual        = EASI_BASE,
  77                 .pfn            = __phys_to_pfn(EASI_START),
  78                 .length         = EASI_SIZE,
  79                 .type           = MT_DEVICE
  80         }
  81 };
  82
  83 static void __init rpc_map_io(void)
  84 {
  85         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
  86
  87         /*
  88          * Turn off floppy.
  89          */
  90         outb(0xc, 0x3f2);
  91
  92         /*
  93          * RiscPC can't handle half-word loads and stores
  94          */
  95         elf_hwcap &= ~HWCAP_HALF;
  96 }
  97
  98 static struct resource acornfb_resources[] = {
  99         {       /* VIDC */
 100                 .start          = 0x03400000,
 101                 .end            = 0x035fffff,
 102                 .flags          = IORESOURCE_MEM,
 103         }, {
 104                 .start          = IRQ_VSYNCPULSE,
 105                 .end            = IRQ_VSYNCPULSE,
 106                 .flags          = IORESOURCE_IRQ,
 107         },
 108 };
 109
 110 static struct platform_device acornfb_device = {
 111         .name                   = "acornfb",
 112         .id                     = -1,
 113         .dev                    = {
 114                 .coherent_dma_mask = 0xffffffff,
 115         },
 116         .num_resources          = ARRAY_SIZE(acornfb_resources),
 117         .resource               = acornfb_resources,
 118 };
 119
 120 static struct resource iomd_resources[] = {
 121         {
 122                 .start          = 0x03200000,
 123                 .end            = 0x0320ffff,
 124                 .flags          = IORESOURCE_MEM,
 125         },
 126 };
 127
 128 static struct platform_device iomd_device = {
 129         .name                   = "iomd",
 130         .id                     = -1,
 131         .num_resources          = ARRAY_SIZE(iomd_resources),
 132         .resource               = iomd_resources,
 133 };
 134
 135 static struct platform_device kbd_device = {
 136         .name                   = "kart",
 137         .id                     = -1,
 138         .dev                    = {
 139                 .parent         = &iomd_device.dev,
 140         },
 141 };
 142
 143 static struct plat_serial8250_port serial_platform_data[] = {
 144         {
 145                 .mapbase        = 0x03010fe0,
 146                 .irq            = 10,
 147                 .uartclk        = 1843200,
 148                 .regshift       = 2,
 149                 .iotype         = UPIO_MEM,
 150                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
 151         },
 152         { },
 153 };
 154
 155 static struct platform_device serial_device = {
 156         .name                   = "serial8250",
 157         .id                     = PLAT8250_DEV_PLATFORM,
 158         .dev                    = {
 159                 .platform_data  = serial_platform_data,
 160         },
 161 };
 162
 163 static struct pata_platform_info pata_platform_data = {
 164         .ioport_shift           = 2,
 165 };
 166
 167 static struct resource pata_resources[] = {
 168         [0] = {
 169                 .start          = 0x030107c0,
 170                 .end            = 0x030107df,
 171                 .flags          = IORESOURCE_MEM,
 172         },
 173         [1] = {
 174                 .start          = 0x03010fd8,
 175                 .end            = 0x03010fdb,
 176                 .flags          = IORESOURCE_MEM,
 177         },
 178         [2] = {
 179                 .start          = IRQ_HARDDISK,
 180                 .end            = IRQ_HARDDISK,
 181                 .flags          = IORESOURCE_IRQ,
 182         },
 183 };
 184
 185 static struct platform_device pata_device = {
 186         .name                   = "pata_platform",
 187         .id                     = -1,
 188         .num_resources          = ARRAY_SIZE(pata_resources),
 189         .resource               = pata_resources,
 190         .dev                    = {
 191                 .platform_data  = &pata_platform_data,
 192                 .coherent_dma_mask = ~0,        /* grumble */
 193         },
 194 };
 195
 196 static struct platform_device *devs[] __initdata = {
 197         &iomd_device,
 198         &kbd_device,
 199         &serial_device,
 200         &acornfb_device,
 201         &pata_device,
 202 };
 203
 204 static int __init rpc_init(void)
 205 {
 206         return platform_add_devices(devs, ARRAY_SIZE(devs));
 207 }
 208
 209 arch_initcall(rpc_init);
 210
 211 extern struct sys_timer ioc_timer;
 212
 213 MACHINE_START(RISCPC, "Acorn-RiscPC")
 214         /* Maintainer: Russell King */
 215         .phys_io        = 0x03000000,
 216         .io_pg_offst    = ((0xe0000000) >> 18) & 0xfffc,
 217         .boot_params    = 0x10000100,
 218         .reserve_lp0    = 1,
 219         .reserve_lp1    = 1,
 220         .map_io         = rpc_map_io,
 221         .init_irq       = rpc_init_irq,
 222         .timer          = &ioc_timer,
 223 MACHINE_END