1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board 4 * 5 * Copyright (C) 2004 Sean Young <sean@mess.org> 6 * 7 * Note: 8 * - In order for detection to work, jumper 3 must be set. 9 * - Drive A and B use the resident flash disk (RFD) flash translation layer. 10 * - If you have created your own jffs file system and the bios overwrites 11 * it during boot, try disabling Drive A: and B: in the boot order. 12 */ 13 14 #include <linux/init.h> 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/mtd/map.h> 18 #include <linux/mtd/mtd.h> 19 #include <linux/mtd/partitions.h> 20 #include <linux/types.h> 21 22 23 #define WINDOW_ADDR 0x09400000 24 #define WINDOW_SIZE 0x00200000 25 26 static struct map_info ts5500_map = { 27 .name = "TS-5500 Flash", 28 .size = WINDOW_SIZE, 29 .bankwidth = 1, 30 .phys = WINDOW_ADDR 31 }; 32 33 static const struct mtd_partition ts5500_partitions[] = { 34 { 35 .name = "Drive A", 36 .offset = 0, 37 .size = 0x0e0000 38 }, 39 { 40 .name = "BIOS", 41 .offset = 0x0e0000, 42 .size = 0x020000, 43 }, 44 { 45 .name = "Drive B", 46 .offset = 0x100000, 47 .size = 0x100000 48 } 49 }; 50 51 #define NUM_PARTITIONS ARRAY_SIZE(ts5500_partitions) 52 53 static struct mtd_info *mymtd; 54 55 static int __init init_ts5500_map(void) 56 { 57 int rc = 0; 58 59 ts5500_map.virt = ioremap(ts5500_map.phys, ts5500_map.size); 60 61 if (!ts5500_map.virt) { 62 printk(KERN_ERR "Failed to ioremap\n"); 63 rc = -EIO; 64 goto err2; 65 } 66 67 simple_map_init(&ts5500_map); 68 69 mymtd = do_map_probe("jedec_probe", &ts5500_map); 70 if (!mymtd) 71 mymtd = do_map_probe("map_rom", &ts5500_map); 72 73 if (!mymtd) { 74 rc = -ENXIO; 75 goto err1; 76 } 77 78 mymtd->owner = THIS_MODULE; 79 mtd_device_register(mymtd, ts5500_partitions, NUM_PARTITIONS); 80 81 return 0; 82 83 err1: 84 iounmap(ts5500_map.virt); 85 err2: 86 return rc; 87 } 88 89 static void __exit cleanup_ts5500_map(void) 90 { 91 if (mymtd) { 92 mtd_device_unregister(mymtd); 93 map_destroy(mymtd); 94 } 95 96 if (ts5500_map.virt) { 97 iounmap(ts5500_map.virt); 98 ts5500_map.virt = NULL; 99 } 100 } 101 102 module_init(init_ts5500_map); 103 module_exit(cleanup_ts5500_map); 104 105 MODULE_LICENSE("GPL"); 106 MODULE_AUTHOR("Sean Young <sean@mess.org>"); 107 MODULE_DESCRIPTION("MTD map driver for Technology Systems TS-5500 board"); 108 109