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 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  * $Id: ts5500_flash.c,v 1.5 2005/11/07 11:14:28 gleixner Exp $
  27  */
  28
  29 #include <linux/config.h>
  30 #include <linux/init.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mtd/map.h>
  34 #include <linux/mtd/mtd.h>
  35 #include <linux/mtd/partitions.h>
  36 #include <linux/types.h>
  37
  38
  39 #define WINDOW_ADDR     0x09400000
  40 #define WINDOW_SIZE     0x00200000
  41
  42 static struct map_info ts5500_map = {
  43         .name = "TS-5500 Flash",
  44         .size = WINDOW_SIZE,
  45         .bankwidth = 1,
  46         .phys = WINDOW_ADDR
  47 };
  48
  49 static struct mtd_partition ts5500_partitions[] = {
  50         {
  51                 .name = "Drive A",
  52                 .offset = 0,
  53                 .size = 0x0e0000
  54         },
  55         {
  56                 .name = "BIOS",
  57                 .offset = 0x0e0000,
  58                 .size = 0x020000,
  59         },
  60         {
  61                 .name = "Drive B",
  62                 .offset = 0x100000,
  63                 .size = 0x100000
  64         }
  65 };
  66
  67 #define NUM_PARTITIONS (sizeof(ts5500_partitions)/sizeof(struct mtd_partition))
  68
  69 static struct mtd_info *mymtd;
  70
  71 static int __init init_ts5500_map(void)
  72 {
  73         int rc = 0;
  74
  75         ts5500_map.virt = ioremap_nocache(ts5500_map.phys, ts5500_map.size);
  76
  77         if (!ts5500_map.virt) {
  78                 printk(KERN_ERR "Failed to ioremap_nocache\n");
  79                 rc = -EIO;
  80                 goto err2;
  81         }
  82
  83         simple_map_init(&ts5500_map);
  84
  85         mymtd = do_map_probe("jedec_probe", &ts5500_map);
  86         if (!mymtd)
  87                 mymtd = do_map_probe("map_rom", &ts5500_map);
  88
  89         if (!mymtd) {
  90                 rc = -ENXIO;
  91                 goto err1;
  92         }
  93
  94         mymtd->owner = THIS_MODULE;
  95         add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS);
  96
  97         return 0;
  98
  99 err1:
 100         map_destroy(mymtd);
 101         iounmap(ts5500_map.virt);
 102 err2:
 103         return rc;
 104 }
 105
 106 static void __exit cleanup_ts5500_map(void)
 107 {
 108         if (mymtd) {
 109                 del_mtd_partitions(mymtd);
 110                 map_destroy(mymtd);
 111         }
 112
 113         if (ts5500_map.virt) {
 114                 iounmap(ts5500_map.virt);
 115                 ts5500_map.virt = NULL;
 116         }
 117 }
 118
 119 module_init(init_ts5500_map);
 120 module_exit(cleanup_ts5500_map);
 121
 122 MODULE_LICENSE("GPL");
 123 MODULE_AUTHOR("Sean Young <sean@mess.org>");
 124 MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board");
 125