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  * $Id: sharpsl-flash.c,v 1.7 2005/11/07 11:14:28 gleixner Exp $
   8  *
   9  * based on rpxlite.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp
  10  *          Handle mapping of the flash on the RPX Lite and CLLF boards
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/types.h>
  26 #include <linux/kernel.h>
  27 #include <linux/mtd/mtd.h>
  28 #include <linux/mtd/map.h>
  29 #include <linux/mtd/partitions.h>
  30 #include <asm/io.h>
  31 #include <asm/mach-types.h>
  32
  33 #define WINDOW_ADDR 0x00000000
  34 #define WINDOW_SIZE 0x00800000
  35 #define BANK_WIDTH 2
  36
  37 static struct mtd_info *mymtd;
  38
  39 struct map_info sharpsl_map = {
  40         .name = "sharpsl-flash",
  41         .size = WINDOW_SIZE,
  42         .bankwidth = BANK_WIDTH,
  43         .phys = WINDOW_ADDR
  44 };
  45
  46 static struct mtd_partition sharpsl_partitions[1] = {
  47         {
  48                 name:           "Boot PROM Filesystem",
  49         }
  50 };
  51
  52 #define NB_OF(x)  (sizeof(x)/sizeof(x[0]))
  53
  54 int __init init_sharpsl(void)
  55 {
  56         struct mtd_partition *parts;
  57         int nb_parts = 0;
  58         char *part_type = "static";
  59
  60         printk(KERN_NOTICE "Sharp SL series flash device: %x at %x\n",
  61                 WINDOW_SIZE, WINDOW_ADDR);
  62         sharpsl_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
  63         if (!sharpsl_map.virt) {
  64                 printk("Failed to ioremap\n");
  65                 return -EIO;
  66         }
  67
  68         simple_map_init(&sharpsl_map);
  69
  70         mymtd = do_map_probe("map_rom", &sharpsl_map);
  71         if (!mymtd) {
  72                 iounmap(sharpsl_map.virt);
  73                 return -ENXIO;
  74         }
  75
  76         mymtd->owner = THIS_MODULE;
  77
  78         if (machine_is_corgi() || machine_is_shepherd() || machine_is_husky()
  79                 || machine_is_poodle()) {
  80                 sharpsl_partitions[0].size=0x006d0000;
  81                 sharpsl_partitions[0].offset=0x00120000;
  82         } else if (machine_is_tosa()) {
  83                 sharpsl_partitions[0].size=0x006a0000;
  84                 sharpsl_partitions[0].offset=0x00160000;
  85         } else if (machine_is_spitz() || machine_is_akita() || machine_is_borzoi()) {
  86                 sharpsl_partitions[0].size=0x006b0000;
  87                 sharpsl_partitions[0].offset=0x00140000;
  88         } else {
  89                 map_destroy(mymtd);
  90                 iounmap(sharpsl_map.virt);
  91                 return -ENODEV;
  92         }
  93
  94         parts = sharpsl_partitions;
  95         nb_parts = NB_OF(sharpsl_partitions);
  96
  97         printk(KERN_NOTICE "Using %s partision definition\n", part_type);
  98         add_mtd_partitions(mymtd, parts, nb_parts);
  99
 100         return 0;
 101 }
 102
 103 static void __exit cleanup_sharpsl(void)
 104 {
 105         if (mymtd) {
 106                 del_mtd_partitions(mymtd);
 107                 map_destroy(mymtd);
 108         }
 109         if (sharpsl_map.virt) {
 110                 iounmap(sharpsl_map.virt);
 111                 sharpsl_map.virt = 0;
 112         }
 113 }
 114
 115 module_init(init_sharpsl);
 116 module_exit(cleanup_sharpsl);
 117
 118 MODULE_LICENSE("GPL");
 119 MODULE_AUTHOR("SHARP (Original: Arnold Christensen <AKC@pel.dk>)");
 120 MODULE_DESCRIPTION("MTD map driver for SHARP SL series");