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1da177e4 LT |
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 a proprietary FTL from General Software which isn't | |
23 | * supported as of yet so standard drives can't be mounted; you can create | |
24 | * your own (e.g. jffs) file system. | |
25 | * - If you have created your own jffs file system and the bios overwrites | |
26 | * it during boot, try disabling Drive A: and B: in the boot order. | |
27 | * | |
28 | * $Id: ts5500_flash.c,v 1.2 2004/11/28 09:40:40 dwmw2 Exp $ | |
29 | */ | |
30 | ||
31 | #include <linux/config.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/types.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/mtd/mtd.h> | |
37 | #include <linux/mtd/map.h> | |
38 | ||
39 | #ifdef CONFIG_MTD_PARTITIONS | |
40 | #include <linux/mtd/partitions.h> | |
41 | #endif | |
42 | ||
43 | #define WINDOW_ADDR 0x09400000 | |
44 | #define WINDOW_SIZE 0x00200000 | |
45 | ||
46 | static struct map_info ts5500_map = { | |
47 | .name = "TS-5500 Flash", | |
48 | .size = WINDOW_SIZE, | |
49 | .bankwidth = 1, | |
50 | .phys = WINDOW_ADDR | |
51 | }; | |
52 | ||
53 | #ifdef CONFIG_MTD_PARTITIONS | |
54 | static struct mtd_partition ts5500_partitions[] = { | |
55 | { | |
56 | .name = "Drive A", | |
57 | .offset = 0, | |
58 | .size = 0x0e0000 | |
59 | }, | |
60 | { | |
61 | .name = "BIOS", | |
62 | .offset = 0x0e0000, | |
63 | .size = 0x020000, | |
64 | }, | |
65 | { | |
66 | .name = "Drive B", | |
67 | .offset = 0x100000, | |
68 | .size = 0x100000 | |
69 | } | |
70 | }; | |
71 | ||
72 | #define NUM_PARTITIONS (sizeof(ts5500_partitions)/sizeof(struct mtd_partition)) | |
73 | ||
74 | #endif | |
75 | ||
76 | static struct mtd_info *mymtd; | |
77 | ||
78 | static int __init init_ts5500_map(void) | |
79 | { | |
80 | int rc = 0; | |
81 | ||
82 | ts5500_map.virt = ioremap_nocache(ts5500_map.phys, ts5500_map.size); | |
83 | ||
84 | if(!ts5500_map.virt) { | |
85 | printk(KERN_ERR "Failed to ioremap_nocache\n"); | |
86 | rc = -EIO; | |
87 | goto err_out_ioremap; | |
88 | } | |
89 | ||
90 | simple_map_init(&ts5500_map); | |
91 | ||
92 | mymtd = do_map_probe("jedec_probe", &ts5500_map); | |
93 | if(!mymtd) | |
94 | mymtd = do_map_probe("map_rom", &ts5500_map); | |
95 | ||
96 | if(!mymtd) { | |
97 | rc = -ENXIO; | |
98 | goto err_out_map; | |
99 | } | |
100 | ||
101 | mymtd->owner = THIS_MODULE; | |
102 | #ifdef CONFIG_MTD_PARTITIONS | |
103 | add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS); | |
104 | #else | |
105 | add_mtd_device(mymtd); | |
106 | #endif | |
107 | ||
108 | return 0; | |
109 | ||
110 | err_out_map: | |
111 | map_destroy(mymtd); | |
112 | err_out_ioremap: | |
113 | iounmap(ts5500_map.virt); | |
114 | ||
115 | return rc; | |
116 | } | |
117 | ||
118 | static void __exit cleanup_ts5500_map(void) | |
119 | { | |
120 | if (mymtd) { | |
121 | #ifdef CONFIG_MTD_PARTITIONS | |
122 | del_mtd_partitions(mymtd); | |
123 | #else | |
124 | del_mtd_device(mymtd); | |
125 | #endif | |
126 | map_destroy(mymtd); | |
127 | } | |
128 | ||
129 | if (ts5500_map.virt) { | |
130 | iounmap(ts5500_map.virt); | |
131 | ts5500_map.virt = NULL; | |
132 | } | |
133 | } | |
134 | ||
135 | module_init(init_ts5500_map); | |
136 | module_exit(cleanup_ts5500_map); | |
137 | ||
138 | MODULE_LICENSE("GPL"); | |
139 | MODULE_AUTHOR("Sean Young <sean@mess.org>"); | |
140 | MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board"); | |
141 |