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 1.2 2004/11/24 20:38:06 rpurdie 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 <asm/io.h>
  28 #include <linux/mtd/mtd.h>
  29 #include <linux/mtd/map.h>
  30 #include <linux/mtd/partitions.h>
  31
  32 #define WINDOW_ADDR 0x00000000
  33 #define WINDOW_SIZE 0x01000000
  34 #define BANK_WIDTH 2
  35
  36 static struct mtd_info *mymtd;
  37
  38 struct map_info sharpsl_map = {
  39         .name = "sharpsl-flash",
  40         .size = WINDOW_SIZE,
  41         .bankwidth = BANK_WIDTH,
  42         .phys = WINDOW_ADDR
  43 };
  44
  45 static struct mtd_partition sharpsl_partitions[1] = {
  46         {
  47                 name:           "Filesystem",
  48                 size:           0x006d0000,
  49                 offset:         0x00120000
  50         }
  51 };
  52
  53 #define NB_OF(x)  (sizeof(x)/sizeof(x[0]))
  54
  55 int __init init_sharpsl(void)
  56 {
  57         struct mtd_partition *parts;
  58         int nb_parts = 0;
  59         char *part_type = "static";
  60
  61         printk(KERN_NOTICE "Sharp SL series flash device: %x at %x\n", 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         mymtd = do_map_probe("map_rom", &sharpsl_map);
  68         if (!mymtd) {
  69                 iounmap(sharpsl_map.virt);
  70                 return -ENXIO;
  71         }
  72
  73         mymtd->owner = THIS_MODULE;
  74
  75         parts = sharpsl_partitions;
  76         nb_parts = NB_OF(sharpsl_partitions);
  77
  78         printk(KERN_NOTICE "Using %s partision definition\n", part_type);
  79         add_mtd_partitions(mymtd, parts, nb_parts);
  80
  81         return 0;
  82 }
  83
  84 static void __exit cleanup_sharpsl(void)
  85 {
  86         if (mymtd) {
  87                 del_mtd_partitions(mymtd);
  88                 map_destroy(mymtd);
  89         }
  90         if (sharpsl_map.virt) {
  91                 iounmap(sharpsl_map.virt);
  92                 sharpsl_map.virt = 0;
  93         }
  94 }
  95
  96 module_init(init_sharpsl);
  97 module_exit(cleanup_sharpsl);
  98
  99 MODULE_LICENSE("GPL");
 100 MODULE_AUTHOR("SHARP (Original: Arnold Christensen <AKC@pel.dk>)");
 101 MODULE_DESCRIPTION("MTD map driver for SHARP SL series");