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"); 125 126