ts5500_flash.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2004 Sean Young <sean@mess.org> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (at your option) any later version. 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License for more details. 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - In order for detection to work, jumper 3 must be set. 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - Drive A and B use a proprietary FTL from General Software which isn't 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * supported as of yet so standard drives can't be mounted; you can create 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * your own (e.g. jffs) file system. 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - If you have created your own jffs file system and the bios overwrites 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it during boot, try disabling Drive A: and B: in the boot order. 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * $Id: ts5500_flash.c,v 1.2 2004/11/28 09:40:40 dwmw2 Exp $ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/mtd.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/map.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_MTD_PARTITIONS 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/partitions.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define WINDOW_ADDR 0x09400000 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define WINDOW_SIZE 0x00200000 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct map_info ts5500_map = { 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "TS-5500 Flash", 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .size = WINDOW_SIZE, 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bankwidth = 1, 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .phys = WINDOW_ADDR 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_MTD_PARTITIONS 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_partition ts5500_partitions[] = { 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "Drive A", 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .offset = 0, 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .size = 0x0e0000 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "BIOS", 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .offset = 0x0e0000, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .size = 0x020000, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "Drive B", 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .offset = 0x100000, 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .size = 0x100000 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NUM_PARTITIONS (sizeof(ts5500_partitions)/sizeof(struct mtd_partition)) 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_info *mymtd; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_ts5500_map(void) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ts5500_map.virt = ioremap_nocache(ts5500_map.phys, ts5500_map.size); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(!ts5500_map.virt) { 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Failed to ioremap_nocache\n"); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EIO; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_out_ioremap; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds simple_map_init(&ts5500_map); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mymtd = do_map_probe("jedec_probe", &ts5500_map); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(!mymtd) 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mymtd = do_map_probe("map_rom", &ts5500_map); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(!mymtd) { 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENXIO; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_out_map; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mymtd->owner = THIS_MODULE; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_MTD_PARTITIONS 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_mtd_device(mymtd); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_out_map: 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_destroy(mymtd); 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_out_ioremap: 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iounmap(ts5500_map.virt); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit cleanup_ts5500_map(void) 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mymtd) { 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_MTD_PARTITIONS 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_mtd_partitions(mymtd); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_mtd_device(mymtd); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_destroy(mymtd); 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ts5500_map.virt) { 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iounmap(ts5500_map.virt); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ts5500_map.virt = NULL; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_ts5500_map); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(cleanup_ts5500_map); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("Sean Young <sean@mess.org>"); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board"); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 142