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 add_mtd_partitions(mymtd, ts5500_partitions, NUM_PARTITIONS);
93
94 return 0;
95
96 err1:
97 map_destroy(mymtd);
98 iounmap(ts5500_map.virt);
99 err2:
100 return rc;
101 }
102
103 static void __exit cleanup_ts5500_map(void)
104 {
105 if (mymtd) {
106 del_mtd_partitions(mymtd);
107 map_destroy(mymtd);
108 }
109
110 if (ts5500_map.virt) {
111 iounmap(ts5500_map.virt);
112 ts5500_map.virt = NULL;
113 }
114 }
115
116 module_init(init_ts5500_map);
117 module_exit(cleanup_ts5500_map);
118
119 MODULE_LICENSE("GPL");
120 MODULE_AUTHOR("Sean Young <sean@mess.org>");
121 MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board");
122
123
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