1 /* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board
3 * Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com)
4 * based on sc520cdp.c by Sysgo Real-Time Solutions GmbH
6 * $Id: netsc520.c,v 1.10 2004/07/12 21:59:44 dwmw2 Exp $
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.
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.
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
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
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/kernel.h>
30 #include <linux/init.h>
32 #include <linux/mtd/mtd.h>
33 #include <linux/mtd/map.h>
34 #include <linux/mtd/partitions.h>
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
41 ** partition is 256 KiB and holds the BIOS image. The third
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.
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.
54 /* partition_info gives details on the logical partitions that the split the
55 * single flash device into. If the size if zero we use up to the end of the
57 static struct mtd_partition partition_info
[]={
59 .name
= "NetSc520 boot kernel",
64 .name
= "NetSc520 Low BIOS",
69 .name
= "NetSc520 file system",
74 .name
= "NetSc520 High BIOS",
79 #define NUM_PARTITIONS (sizeof(partition_info)/sizeof(partition_info[0]))
81 #define WINDOW_SIZE 0x00100000
82 #define WINDOW_ADDR 0x00200000
84 static struct map_info netsc520_map
= {
85 .name
= "netsc520 Flash Bank",
91 #define NUM_FLASH_BANKS (sizeof(netsc520_map)/sizeof(struct map_info))
93 static struct mtd_info
*mymtd
;
95 static int __init
init_netsc520(void)
97 printk(KERN_NOTICE
"NetSc520 flash device: 0x%lx at 0x%lx\n", netsc520_map
.size
, netsc520_map
.phys
);
98 netsc520_map
.virt
= (unsigned long)ioremap_nocache(netsc520_map
.phys
, netsc520_map
.size
);
100 if (!netsc520_map
.virt
) {
101 printk("Failed to ioremap_nocache\n");
105 simple_map_init(&netsc520_map
);
107 mymtd
= do_map_probe("cfi_probe", &netsc520_map
);
109 mymtd
= do_map_probe("map_ram", &netsc520_map
);
111 mymtd
= do_map_probe("map_rom", &netsc520_map
);
114 iounmap((void *)netsc520_map
.virt
);
118 mymtd
->owner
= THIS_MODULE
;
119 add_mtd_partitions( mymtd
, partition_info
, NUM_PARTITIONS
);
123 static void __exit
cleanup_netsc520(void)
126 del_mtd_partitions(mymtd
);
129 if (netsc520_map
.virt
) {
130 iounmap((void *)netsc520_map
.virt
);
131 netsc520_map
.virt
= 0;
135 module_init(init_netsc520
);
136 module_exit(cleanup_netsc520
);
138 MODULE_LICENSE("GPL");
139 MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>");
140 MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board");