mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-22 23:56:48 +02:00
c72b703c85
image format (thanks unverbraucht, #1566), support jffs2 images. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6948 3c298f89-4303-0410-b956-a3cf2f4a3e73
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2007 OpenWrt.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* TI AR7 flash partition table.
|
|
* Based on ar7 map by Felix Fietkau.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/squashfs_fs.h>
|
|
|
|
struct ar7_bin_rec {
|
|
unsigned int checksum;
|
|
unsigned int length;
|
|
unsigned int address;
|
|
};
|
|
|
|
static struct mtd_partition ar7_parts[5];
|
|
|
|
static int create_mtd_partitions(struct mtd_info *master,
|
|
struct mtd_partition **pparts,
|
|
unsigned long origin)
|
|
{
|
|
struct ar7_bin_rec header;
|
|
unsigned int offset, len;
|
|
unsigned int pre_size = master->erasesize, post_size = 0,
|
|
root_offset = 0xe0000;
|
|
int retries = 10;
|
|
|
|
printk("Parsing AR7 partition map...\n");
|
|
|
|
ar7_parts[0].name = "loader";
|
|
ar7_parts[0].offset = 0;
|
|
ar7_parts[0].size = master->erasesize;
|
|
ar7_parts[0].mask_flags = MTD_WRITEABLE;
|
|
|
|
ar7_parts[1].name = "config";
|
|
ar7_parts[1].offset = 0;
|
|
ar7_parts[1].size = master->erasesize;
|
|
ar7_parts[1].mask_flags = 0;
|
|
|
|
do {
|
|
offset = pre_size;
|
|
master->read(master, offset, sizeof(header), &len, (u_char *)&header);
|
|
if (!strncmp((char *)&header, "TIENV0.8", 8))
|
|
ar7_parts[1].offset = pre_size;
|
|
if (header.checksum == 0xfeedfa42)
|
|
break;
|
|
if (header.checksum == 0xfeed1281)
|
|
break;
|
|
pre_size += master->erasesize;
|
|
} while (retries--);
|
|
|
|
pre_size = offset;
|
|
|
|
if (!ar7_parts[1].offset) {
|
|
ar7_parts[1].offset = master->size - master->erasesize;
|
|
post_size = master->erasesize;
|
|
}
|
|
|
|
switch (header.checksum) {
|
|
case 0xfeedfa42:
|
|
while (header.length) {
|
|
offset += sizeof(header) + header.length;
|
|
master->read(master, offset, sizeof(header),
|
|
&len, (u_char *)&header);
|
|
}
|
|
root_offset = offset + sizeof(header) + 4;
|
|
break;
|
|
case 0xfeed1281:
|
|
while (header.length) {
|
|
offset += sizeof(header) + header.length;
|
|
master->read(master, offset, sizeof(header),
|
|
&len, (u_char *)&header);
|
|
}
|
|
root_offset = offset + sizeof(header) + 4 + 0xff;
|
|
root_offset &= ~(u32)0xff;
|
|
break;
|
|
default:
|
|
printk("Unknown magic: %08x\n", header.checksum);
|
|
break;
|
|
}
|
|
|
|
master->read(master, root_offset, sizeof(header), &len, (u_char *)&header);
|
|
if (header.checksum != SQUASHFS_MAGIC) {
|
|
root_offset += master->erasesize - 1;
|
|
root_offset &= ~(master->erasesize - 1);
|
|
}
|
|
|
|
ar7_parts[2].name = "linux";
|
|
ar7_parts[2].offset = pre_size;
|
|
ar7_parts[2].size = master->size - pre_size - post_size;
|
|
ar7_parts[2].mask_flags = 0;
|
|
|
|
ar7_parts[3].name = "rootfs";
|
|
ar7_parts[3].offset = root_offset;
|
|
ar7_parts[3].size = master->size - root_offset - post_size;
|
|
ar7_parts[3].mask_flags = 0;
|
|
|
|
*pparts = ar7_parts;
|
|
return 4;
|
|
}
|
|
|
|
static struct mtd_part_parser ar7_parser = {
|
|
.owner = THIS_MODULE,
|
|
.parse_fn = create_mtd_partitions,
|
|
.name = "ar7part",
|
|
};
|
|
|
|
static int __init ar7_parser_init(void)
|
|
{
|
|
return register_mtd_parser(&ar7_parser);
|
|
}
|
|
|
|
module_init(ar7_parser_init);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Felix Fietkau, Eugene Konev");
|
|
MODULE_DESCRIPTION("MTD partitioning for TI AR7");
|