Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board |
2 | * | |
3 | * Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com) | |
4 | * based on sc520cdp.c by Sysgo Real-Time Solutions GmbH | |
5 | * | |
69f34c98 | 6 | * $Id: netsc520.c,v 1.14 2005/11/07 11:14:27 gleixner Exp $ |
1da177e4 LT |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | |
21 | * | |
22 | * The NetSc520 is a demonstration board for the Elan Sc520 processor available | |
23 | * from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another | |
24 | * 16 megs of SDRAM. | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/init.h> | |
31 | #include <asm/io.h> | |
32 | #include <linux/mtd/mtd.h> | |
33 | #include <linux/mtd/map.h> | |
34 | #include <linux/mtd/partitions.h> | |
35 | ||
36 | ||
37 | /* | |
38 | ** The single, 16 megabyte flash bank is divided into four virtual | |
39 | ** partitions. The first partition is 768 KiB and is intended to | |
40 | ** store the kernel image loaded by the bootstrap loader. The second | |
69f34c98 | 41 | ** partition is 256 KiB and holds the BIOS image. The third |
1da177e4 LT |
42 | ** partition is 14.5 MiB and is intended for the flash file system |
43 | ** image. The last partition is 512 KiB and contains another copy | |
44 | ** of the BIOS image and the reset vector. | |
45 | ** | |
46 | ** Only the third partition should be mounted. The first partition | |
47 | ** should not be mounted, but it can erased and written to using the | |
48 | ** MTD character routines. The second and fourth partitions should | |
49 | ** not be touched - it is possible to corrupt the BIOS image by | |
50 | ** mounting these partitions, and potentially the board will not be | |
51 | ** recoverable afterwards. | |
52 | */ | |
53 | ||
69f34c98 | 54 | /* partition_info gives details on the logical partitions that the split the |
1da177e4 LT |
55 | * single flash device into. If the size if zero we use up to the end of the |
56 | * device. */ | |
57 | static struct mtd_partition partition_info[]={ | |
69f34c98 TG |
58 | { |
59 | .name = "NetSc520 boot kernel", | |
60 | .offset = 0, | |
1da177e4 LT |
61 | .size = 0xc0000 |
62 | }, | |
69f34c98 TG |
63 | { |
64 | .name = "NetSc520 Low BIOS", | |
65 | .offset = 0xc0000, | |
1da177e4 LT |
66 | .size = 0x40000 |
67 | }, | |
69f34c98 TG |
68 | { |
69 | .name = "NetSc520 file system", | |
70 | .offset = 0x100000, | |
1da177e4 LT |
71 | .size = 0xe80000 |
72 | }, | |
69f34c98 TG |
73 | { |
74 | .name = "NetSc520 High BIOS", | |
75 | .offset = 0xf80000, | |
1da177e4 LT |
76 | .size = 0x80000 |
77 | }, | |
78 | }; | |
87d10f3c | 79 | #define NUM_PARTITIONS ARRAY_SIZE(partition_info) |
1da177e4 LT |
80 | |
81 | #define WINDOW_SIZE 0x00100000 | |
82 | #define WINDOW_ADDR 0x00200000 | |
83 | ||
84 | static struct map_info netsc520_map = { | |
85 | .name = "netsc520 Flash Bank", | |
86 | .size = WINDOW_SIZE, | |
87 | .bankwidth = 4, | |
88 | .phys = WINDOW_ADDR, | |
89 | }; | |
90 | ||
87d10f3c | 91 | #define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map) |
1da177e4 LT |
92 | |
93 | static struct mtd_info *mymtd; | |
94 | ||
95 | static int __init init_netsc520(void) | |
96 | { | |
97 | printk(KERN_NOTICE "NetSc520 flash device: 0x%lx at 0x%lx\n", netsc520_map.size, netsc520_map.phys); | |
98 | netsc520_map.virt = ioremap_nocache(netsc520_map.phys, netsc520_map.size); | |
99 | ||
100 | if (!netsc520_map.virt) { | |
101 | printk("Failed to ioremap_nocache\n"); | |
102 | return -EIO; | |
103 | } | |
104 | ||
105 | simple_map_init(&netsc520_map); | |
106 | ||
107 | mymtd = do_map_probe("cfi_probe", &netsc520_map); | |
108 | if(!mymtd) | |
109 | mymtd = do_map_probe("map_ram", &netsc520_map); | |
110 | if(!mymtd) | |
111 | mymtd = do_map_probe("map_rom", &netsc520_map); | |
112 | ||
113 | if (!mymtd) { | |
114 | iounmap(netsc520_map.virt); | |
115 | return -ENXIO; | |
116 | } | |
69f34c98 | 117 | |
1da177e4 LT |
118 | mymtd->owner = THIS_MODULE; |
119 | add_mtd_partitions( mymtd, partition_info, NUM_PARTITIONS ); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static void __exit cleanup_netsc520(void) | |
124 | { | |
125 | if (mymtd) { | |
126 | del_mtd_partitions(mymtd); | |
127 | map_destroy(mymtd); | |
128 | } | |
129 | if (netsc520_map.virt) { | |
130 | iounmap(netsc520_map.virt); | |
131 | netsc520_map.virt = NULL; | |
132 | } | |
133 | } | |
134 | ||
135 | module_init(init_netsc520); | |
136 | module_exit(cleanup_netsc520); | |
137 | ||
138 | MODULE_LICENSE("GPL"); | |
139 | MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>"); | |
140 | MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board"); |