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 * 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.
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.
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
20 * The NetSc520 is a demonstration board for the Elan Sc520 processor available
21 * from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another
25 #include <linux/module.h>
26 #include <linux/types.h>
27 #include <linux/kernel.h>
28 #include <linux/init.h>
30 #include <linux/mtd/mtd.h>
31 #include <linux/mtd/map.h>
32 #include <linux/mtd/partitions.h>
36 ** The single, 16 megabyte flash bank is divided into four virtual
37 ** partitions. The first partition is 768 KiB and is intended to
38 ** store the kernel image loaded by the bootstrap loader. The second
39 ** partition is 256 KiB and holds the BIOS image. The third
40 ** partition is 14.5 MiB and is intended for the flash file system
41 ** image. The last partition is 512 KiB and contains another copy
42 ** of the BIOS image and the reset vector.
44 ** Only the third partition should be mounted. The first partition
45 ** should not be mounted, but it can erased and written to using the
46 ** MTD character routines. The second and fourth partitions should
47 ** not be touched - it is possible to corrupt the BIOS image by
48 ** mounting these partitions, and potentially the board will not be
49 ** recoverable afterwards.
52 /* partition_info gives details on the logical partitions that the split the
53 * single flash device into. If the size if zero we use up to the end of the
55 static struct mtd_partition partition_info[]={
57 .name = "NetSc520 boot kernel",
62 .name = "NetSc520 Low BIOS",
67 .name = "NetSc520 file system",
72 .name = "NetSc520 High BIOS",
77 #define NUM_PARTITIONS ARRAY_SIZE(partition_info)
79 #define WINDOW_SIZE 0x00100000
80 #define WINDOW_ADDR 0x00200000
82 static struct map_info netsc520_map = {
83 .name = "netsc520 Flash Bank",
89 #define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map)
91 static struct mtd_info *mymtd;
93 static int __init init_netsc520(void)
95 printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n",
96 (unsigned long long)netsc520_map.size,
97 (unsigned long long)netsc520_map.phys);
98 netsc520_map.virt = 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(netsc520_map.virt);
118 mymtd->owner = THIS_MODULE;
119 mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
123 static void __exit cleanup_netsc520(void)
126 mtd_device_unregister(mymtd);
129 if (netsc520_map.virt) {
130 iounmap(netsc520_map.virt);
131 netsc520_map.virt = NULL;
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");