1/*
2 * Flash memory access on 4G Systems MTX-1 boards
3 *
4 * $Id: mtx-1_flash.c,v 1.1.1.1 2007/08/03 18:52:44 Exp $
5 *
6 * (C) 2005 Bruno Randolf <bruno.randolf@4g-systems.biz>
7 * (C) 2005 J��rn Engel <joern@wohnheim.fh-wedel.de>
8 *
9 */
10
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/init.h>
14#include <linux/kernel.h>
15
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/map.h>
18#include <linux/mtd/partitions.h>
19
20#include <asm/io.h>
21
22static struct map_info mtx1_map = {
23	.name = "MTX-1 flash",
24	.bankwidth = 4,
25	.size = 0x2000000,
26	.phys = 0x1E000000,
27};
28
29static struct mtd_partition mtx1_partitions[] = {
30        {
31                .name = "filesystem",
32                .size = 0x01C00000,
33                .offset = 0,
34        },{
35                .name = "yamon",
36                .size = 0x00100000,
37                .offset = MTDPART_OFS_APPEND,
38                .mask_flags = MTD_WRITEABLE,
39        },{
40                .name = "kernel",
41                .size = 0x002c0000,
42                .offset = MTDPART_OFS_APPEND,
43        },{
44                .name = "yamon env",
45                .size = 0x00040000,
46                .offset = MTDPART_OFS_APPEND,
47        }
48};
49
50static struct mtd_info *mtx1_mtd;
51
52int __init mtx1_mtd_init(void)
53{
54	int ret = -ENXIO;
55
56	simple_map_init(&mtx1_map);
57
58	mtx1_map.virt = ioremap(mtx1_map.phys, mtx1_map.size);
59	if (!mtx1_map.virt)
60		return -EIO;
61
62	mtx1_mtd = do_map_probe("cfi_probe", &mtx1_map);
63	if (!mtx1_mtd)
64		goto err;
65
66	mtx1_mtd->owner = THIS_MODULE;
67
68	ret = add_mtd_partitions(mtx1_mtd, mtx1_partitions,
69			ARRAY_SIZE(mtx1_partitions));
70	if (ret)
71		goto err;
72
73	return 0;
74
75err:
76       iounmap(mtx1_map.virt);
77       return ret;
78}
79
80static void __exit mtx1_mtd_cleanup(void)
81{
82	if (mtx1_mtd) {
83		del_mtd_partitions(mtx1_mtd);
84		map_destroy(mtx1_mtd);
85	}
86	if (mtx1_map.virt)
87		iounmap(mtx1_map.virt);
88}
89
90module_init(mtx1_mtd_init);
91module_exit(mtx1_mtd_cleanup);
92
93MODULE_AUTHOR("Bruno Randolf <bruno.randolf@4g-systems.biz>");
94MODULE_DESCRIPTION("MTX-1 flash map");
95MODULE_LICENSE("GPL");
96