drivers/mtd/maps/sharpsl-flash.c

   1 /*
   2  * sharpsl-flash.c
   3  *
   4  * Copyright (C) 2001 Lineo Japan, Inc.
   5  * Copyright (C) 2002  SHARP
   6  *
   7  * based on rpxlite.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp
   8  *          Handle mapping of the flash on the RPX Lite and CLLF boards
   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 as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/kernel.h>
  25 #include <linux/mtd/mtd.h>
  26 #include <linux/mtd/map.h>
  27 #include <linux/mtd/partitions.h>
  28 #include <asm/io.h>
  29 #include <asm/mach-types.h>
  30
  31 #define WINDOW_ADDR 0x00000000
  32 #define WINDOW_SIZE 0x00800000
  33 #define BANK_WIDTH 2
  34
  35 static struct mtd_info *mymtd;
  36
  37 struct map_info sharpsl_map = {
  38         .name = "sharpsl-flash",
  39         .size = WINDOW_SIZE,
  40         .bankwidth = BANK_WIDTH,
  41         .phys = WINDOW_ADDR
  42 };
  43
  44 static struct mtd_partition sharpsl_partitions[1] = {
  45         {
  46                 name:           "Boot PROM Filesystem",
  47         }
  48 };
  49
  50 static int __init init_sharpsl(void)
  51 {
  52         struct mtd_partition *parts;
  53         int nb_parts = 0;
  54         char *part_type = "static";
  55
  56         printk(KERN_NOTICE "Sharp SL series flash device: %x at %x\n",
  57                 WINDOW_SIZE, WINDOW_ADDR);
  58         sharpsl_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
  59         if (!sharpsl_map.virt) {
  60                 printk("Failed to ioremap\n");
  61                 return -EIO;
  62         }
  63
  64         simple_map_init(&sharpsl_map);
  65
  66         mymtd = do_map_probe("map_rom", &sharpsl_map);
  67         if (!mymtd) {
  68                 iounmap(sharpsl_map.virt);
  69                 return -ENXIO;
  70         }
  71
  72         mymtd->owner = THIS_MODULE;
  73
  74         if (machine_is_corgi() || machine_is_shepherd() || machine_is_husky()
  75                 || machine_is_poodle()) {
  76                 sharpsl_partitions[0].size=0x006d0000;
  77                 sharpsl_partitions[0].offset=0x00120000;
  78         } else if (machine_is_tosa()) {
  79                 sharpsl_partitions[0].size=0x006a0000;
  80                 sharpsl_partitions[0].offset=0x00160000;
  81         } else if (machine_is_spitz() || machine_is_akita() || machine_is_borzoi()) {
  82                 sharpsl_partitions[0].size=0x006b0000;
  83                 sharpsl_partitions[0].offset=0x00140000;
  84         } else {
  85                 map_destroy(mymtd);
  86                 iounmap(sharpsl_map.virt);
  87                 return -ENODEV;
  88         }
  89
  90         parts = sharpsl_partitions;
  91         nb_parts = ARRAY_SIZE(sharpsl_partitions);
  92
  93         printk(KERN_NOTICE "Using %s partition definition\n", part_type);
  94         add_mtd_partitions(mymtd, parts, nb_parts);
  95
  96         return 0;
  97 }
  98
  99 static void __exit cleanup_sharpsl(void)
 100 {
 101         if (mymtd) {
 102                 del_mtd_partitions(mymtd);
 103                 map_destroy(mymtd);
 104         }
 105         if (sharpsl_map.virt) {
 106                 iounmap(sharpsl_map.virt);
 107                 sharpsl_map.virt = 0;
 108         }
 109 }
 110
 111 module_init(init_sharpsl);
 112 module_exit(cleanup_sharpsl);
 113
 114 MODULE_LICENSE("GPL");
 115 MODULE_AUTHOR("SHARP (Original: Arnold Christensen <AKC@pel.dk>)");
 116 MODULE_DESCRIPTION("MTD map driver for SHARP SL series");