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
39static struct map_info ts5500_map = {
40	.name = "TS-5500 Flash",
41	.size = WINDOW_SIZE,
42	.bankwidth = 1,
43	.phys = WINDOW_ADDR
44};
45
46static 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
66static struct mtd_info *mymtd;
67
68static 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	mtd_device_register(mymtd, ts5500_partitions, NUM_PARTITIONS);
93
94	return 0;
95
96err1:
97	iounmap(ts5500_map.virt);
98err2:
99	return rc;
100}
101
102static void __exit cleanup_ts5500_map(void)
103{
104	if (mymtd) {
105		mtd_device_unregister(mymtd);
106		map_destroy(mymtd);
107	}
108
109	if (ts5500_map.virt) {
110		iounmap(ts5500_map.virt);
111		ts5500_map.virt = NULL;
112	}
113}
114
115module_init(init_ts5500_map);
116module_exit(cleanup_ts5500_map);
117
118MODULE_LICENSE("GPL");
119MODULE_AUTHOR("Sean Young <sean@mess.org>");
120MODULE_DESCRIPTION("MTD map driver for Technology Systems TS-5500 board");
121
122