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