tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
46static 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
54static 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
76static struct mtd_info *mymtd;
77
78static 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
110err_out_map:
111 map_destroy(mymtd);
112err_out_ioremap:
113 iounmap(ts5500_map.virt);
114
115 return rc;
116}
117
118static 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
135module_init(init_ts5500_map);
136module_exit(cleanup_ts5500_map);
137
138MODULE_LICENSE("GPL");
139MODULE_AUTHOR("Sean Young <sean@mess.org>");
140MODULE_DESCRIPTION("MTD map driver for Techology Systems TS-5500 board");
141