arch/m68k/coldfire/firebee.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /***************************************************************************/
   3
   4 /*
   5  *      firebee.c -- extra startup code support for the FireBee boards
   6  *
   7  *      Copyright (C) 2011, Greg Ungerer (gerg@snapgear.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/partitions.h>
  18 #include <linux/mtd/physmap.h>
  19 #include <asm/coldfire.h>
  20 #include <asm/mcfsim.h>
  21
  22 /***************************************************************************/
  23
  24 /*
  25  *      8MB of NOR flash fitted to the FireBee board.
  26  */
  27 #define FLASH_PHYS_ADDR         0xe0000000      /* Physical address of flash */
  28 #define FLASH_PHYS_SIZE         0x00800000      /* Size of flash */
  29
  30 #define PART_BOOT_START         0x00000000      /* Start at bottom of flash */
  31 #define PART_BOOT_SIZE          0x00040000      /* 256k in size */
  32 #define PART_IMAGE_START        0x00040000      /* Start after boot loader */
  33 #define PART_IMAGE_SIZE         0x006c0000      /* Most of flash */
  34 #define PART_FPGA_START         0x00700000      /* Start at offset 7MB */
  35 #define PART_FPGA_SIZE          0x00100000      /* 1MB in size */
  36
  37 static struct mtd_partition firebee_flash_parts[] = {
  38         {
  39                 .name   = "dBUG",
  40                 .offset = PART_BOOT_START,
  41                 .size   = PART_BOOT_SIZE,
  42         },
  43         {
  44                 .name   = "FPGA",
  45                 .offset = PART_FPGA_START,
  46                 .size   = PART_FPGA_SIZE,
  47         },
  48         {
  49                 .name   = "image",
  50                 .offset = PART_IMAGE_START,
  51                 .size   = PART_IMAGE_SIZE,
  52         },
  53 };
  54
  55 static struct physmap_flash_data firebee_flash_data = {
  56         .width          = 2,
  57         .nr_parts       = ARRAY_SIZE(firebee_flash_parts),
  58         .parts          = firebee_flash_parts,
  59 };
  60
  61 static struct resource firebee_flash_resource = {
  62         .start          = FLASH_PHYS_ADDR,
  63         .end            = FLASH_PHYS_ADDR + FLASH_PHYS_SIZE,
  64         .flags          = IORESOURCE_MEM,
  65 };
  66
  67 static struct platform_device firebee_flash = {
  68         .name           = "physmap-flash",
  69         .id             = 0,
  70         .dev            = {
  71                 .platform_data = &firebee_flash_data,
  72         },
  73         .num_resources  = 1,
  74         .resource       = &firebee_flash_resource,
  75 };
  76
  77 /***************************************************************************/
  78
  79 static int __init init_firebee(void)
  80 {
  81         platform_device_register(&firebee_flash);
  82         return 0;
  83 }
  84
  85 arch_initcall(init_firebee);
  86
  87 /***************************************************************************/