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