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"); 141 142