drivers/mtd/maps/ts5500_flash.c

   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 a proprietary FTL from General Software which isn't
  23  *   supported as of yet so standard drives can't be mounted; you can create
  24  *   your own (e.g. jffs) file system.
  25  * - If you have created your own jffs file system and the bios overwrites
  26  *   it during boot, try disabling Drive A: and B: in the boot order.
  27  *
  28  * $Id: ts5500_flash.c,v 1.2 2004/11/28 09:40:40 dwmw2 Exp $
  29  */
  30
  31 #include <linux/config.h>
  32 #include <linux/module.h>
  33 #include <linux/types.h>
  34 #include <linux/kernel.h>
  35 #include <linux/init.h>
  36 #include <linux/mtd/mtd.h>
  37 #include <linux/mtd/map.h>
  38
  39 #ifdef CONFIG_MTD_PARTITIONS
  40 #include <linux/mtd/partitions.h>
  41 #endif
  42
  43 #define WINDOW_ADDR     0x09400000
  44 #define WINDOW_SIZE     0x00200000
  45
  46 static struct map_info ts5500_map = {
  47         .name = "TS-5500 Flash",
  48         .size = WINDOW_SIZE,
  49         .bankwidth = 1,
  50         .phys = WINDOW_ADDR
  51 };
  52
  53 #ifdef CONFIG_MTD_PARTITIONS
  54 static struct mtd_partition ts5500_partitions[] = {
  55         {
  56                 .name = "Drive A",
  57                 .offset = 0,
  58                 .size = 0x0e0000
  59         },
  60         {
  61                 .name = "BIOS",
  62                 .offset = 0x0e0000,
  63                 .size = 0x020000,
  64         },
  65         {
  66                 .name = "Drive B",
  67                 .offset = 0x100000,
  68                 .size = 0x100000
  69         }
  70 };
  71
  72 #define NUM_PARTITIONS (sizeof(ts5500_partitions)/sizeof(struct mtd_partition))
  73
  74 #endif
  75
  76 static struct mtd_info *mymtd;
  77
  78 static int __init init_ts5500_map(void)
  79 {
  80         int rc = 0;
  81
  82         ts5500_map.virt = ioremap_nocache(ts5500_map.phys, ts5500_map.size);
  83
  84         if(!ts5500_map.virt) {
  85                 printk(KERN_ERR "Failed to ioremap_nocache\n");
  86                 rc = -EIO;
  87                 goto err_out_ioremap;
  88         }
  89
  90         simple_map_init(&ts5500_map);
  91
  92         mymtd = do_map_probe("jedec_probe", &ts5500_map);
  93         if(!mymtd)
  94                 mymtd = do_map_probe("map_rom", &ts5500_map);
  95
  96         if(!mymtd) {
  97                 rc = -ENXIO;
  98                 goto err_out_map;
  99         }
 100
 101         mymtd->owner = THIS_MODULE;
 102 #ifdef CONFIG_MTD_PARTITIONS
 103         add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS);
 104 #else
 105         add_mtd_device(mymtd);
 106 #endif
 107
 108         return 0;
 109
 110 err_out_map:
 111         map_destroy(mymtd);
 112 err_out_ioremap:
 113         iounmap(ts5500_map.virt);
 114
 115         return rc;
 116 }
 117
 118 static void __exit cleanup_ts5500_map(void)
 119 {
 120         if (mymtd) {
 121 #ifdef CONFIG_MTD_PARTITIONS
 122                 del_mtd_partitions(mymtd);
 123 #else
 124                 del_mtd_device(mymtd);
 125 #endif
 126                 map_destroy(mymtd);
 127         }
 128
 129         if (ts5500_map.virt) {
 130                 iounmap(ts5500_map.virt);
 131                 ts5500_map.virt = NULL;
 132         }
 133 }
 134
 135 module_init(init_ts5500_map);
 136 module_exit(cleanup_ts5500_map);
 137
 138 MODULE_LICENSE("GPL");
 139 MODULE_AUTHOR("Sean Young <sean@mess.org>");
 140 MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board");
 141