-/*
- *
- * 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
- *
- * Atmel AT91 flash partition table. (Modified by Hamish Guthrie).
- * 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>
-
-static struct mtd_partition at91_parts[6];
-
-static int create_mtd_partitions(struct mtd_info *master,
- struct mtd_partition **pparts,
- unsigned long origin)
-{
- unsigned int offset, len;
- unsigned int pre_size = 0x42000, root_max = 0x362400;
- unsigned char buf[512];
- struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
-
- printk("Parsing AT91 partition map...\n");
-
- at91_parts[0].name = "loaders";
- at91_parts[0].offset = 0;
- at91_parts[0].size = 0x21000;
- at91_parts[0].mask_flags = MTD_WRITEABLE;
-
- at91_parts[1].name = "ubparams";
- at91_parts[1].offset = 0x21000;
- at91_parts[1].size = 0x8400;
- at91_parts[1].mask_flags = 0;
-
- at91_parts[2].name = "kernel";
- at91_parts[2].offset = pre_size;
- at91_parts[2].size = 0;
- at91_parts[2].mask_flags = 0;
-
- at91_parts[3].name = "rootfs";
- at91_parts[3].offset = 0;
- at91_parts[3].size = 0;
- at91_parts[3].mask_flags = 0;
-
- for(offset = pre_size; offset < root_max; offset += master->erasesize) {
-
- memset(&buf, 0xe5, sizeof(buf));
-
- if (master->read(master, offset, sizeof(buf), &len, buf) || len != sizeof(buf))
- break;
-
- if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
- printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n",
- master->name, (u32) sb->bytes_used);
-
- at91_parts[3].size = sb->bytes_used;
- at91_parts[3].offset = offset;
- len = at91_parts[3].offset + at91_parts[3].size;
- len = ((len / (master->erasesize * 8)) + 1) * master->erasesize * 8;
- at91_parts[3].size = len - at91_parts[3].offset;
- at91_parts[2].size = offset - at91_parts[2].offset;
- break;
- }
- }
-
- if (at91_parts[3].size == 0) {
- printk(KERN_NOTICE "%s: Couldn't find root filesystem\n", master->name);
- return -1;
- }
-
- at91_parts[4].name = "rootfs_data";
- at91_parts[4].offset = root_max;
- at91_parts[4].size = master->size - root_max;
- at91_parts[4].mask_flags = 0;
-
- at91_parts[5].name = "complete";
- at91_parts[5].offset = 0;
- at91_parts[5].size = master->size;
- at91_parts[5].mask_flags = 0;
-
- *pparts = at91_parts;
- return 6;
-}
-
-static struct mtd_part_parser at91_parser = {
- .owner = THIS_MODULE,
- .parse_fn = create_mtd_partitions,
- .name = "at91part",
-};
-
-static int __init at91_parser_init(void)
-{
- register_mtd_parser(&at91_parser);
-
- return 0;
-}
-
-module_init(at91_parser_init);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Felix Fietkau, Eugene Konev, Hamish Guthrie");
-MODULE_DESCRIPTION("MTD partitioning for Atmel at91");
projects / openwrt / svn-archive / archive.git / commitdiff