LXR linux/drivers/mtd/maps/ts5500

   1/*
   2 * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board
   3 *
   4 * Copyright (C) 2004 Sean Young <sean@mess.org>
   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 as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  19 *
  20 * Note:
  21 * - In order for detection to work, jumper 3 must be set.
  22 * - Drive A and B use the resident flash disk (RFD) flash translation layer.
  23 * - If you have created your own jffs file system and the bios overwrites
  24 *   it during boot, try disabling Drive A: and B: in the boot order.
  25 */
  26
  27#include <linux/init.h>
  28#include <linux/module.h>
  29#include <linux/kernel.h>
  30#include <linux/mtd/map.h>
  31#include <linux/mtd/mtd.h>
  32#include <linux/mtd/partitions.h>
  33#include <linux/types.h>
  34
  35
  36#define WINDOW_ADDR     0x09400000
  37#define WINDOW_SIZE     0x00200000
  38
  39static struct map_info ts5500_map = {
  40        .name = "TS-5500 Flash",
  41        .size = WINDOW_SIZE,
  42        .bankwidth = 1,
  43        .phys = WINDOW_ADDR
  44};
  45
  46static struct mtd_partition ts5500_partitions[] = {
  47        {
  48                .name = "Drive A",
  49                .offset = 0,
  50                .size = 0x0e0000
  51        },
  52        {
  53                .name = "BIOS",
  54                .offset = 0x0e0000,
  55                .size = 0x020000,
  56        },
  57        {
  58                .name = "Drive B",
  59                .offset = 0x100000,
  60                .size = 0x100000
  61        }
  62};
  63
  64#define NUM_PARTITIONS ARRAY_SIZE(ts5500_partitions)
  65
  66static struct mtd_info *mymtd;
  67
  68static int __init init_ts5500_map(void)
  69{
  70        int rc = 0;
  71
  72        ts5500_map.virt = ioremap_nocache(ts5500_map.phys, ts5500_map.size);
  73
  74        if (!ts5500_map.virt) {
  75                printk(KERN_ERR "Failed to ioremap_nocache\n");
  76                rc = -EIO;
  77                goto err2;
  78        }
  79
  80        simple_map_init(&ts5500_map);
  81
  82        mymtd = do_map_probe("jedec_probe", &ts5500_map);
  83        if (!mymtd)
  84                mymtd = do_map_probe("map_rom", &ts5500_map);
  85
  86        if (!mymtd) {
  87                rc = -ENXIO;
  88                goto err1;
  89        }
  90
  91        mymtd->owner = THIS_MODULE;
  92        add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS);
  93
  94        return 0;
  95
  96err1:
  97        iounmap(ts5500_map.virt);
  98err2:
  99        return rc;
 100}
 101
 102static void __exit cleanup_ts5500_map(void)
 103{
 104        if (mymtd) {
 105                del_mtd_partitions(mymtd);
 106                map_destroy(mymtd);
 107        }
 108
 109        if (ts5500_map.virt) {
 110                iounmap(ts5500_map.virt);
 111                ts5500_map.virt = NULL;
 112        }
 113}
 114
 115module_init(init_ts5500_map);
 116module_exit(cleanup_ts5500_map);
 117
 118MODULE_LICENSE("GPL");
 119MODULE_AUTHOR("Sean Young <sean@mess.org>");
 120MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board");
 121
 122