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authorejka <ejka@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-04-15 04:01:45 +0000
committerejka <ejka@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-04-15 04:01:45 +0000
commitc72b703c85edad85749cb37815f584ed020a2d8e (patch)
treed496f9689a648dd815cb5db6c99b2ba622b0ab57 /target/linux/ar7-2.6/files/drivers
parent9a3dff24f5f9cd503b038d2f576cd9edc18dcb3a (diff)
ar7: improve search for image start (thanks matteo), add support for avm eva
image format (thanks unverbraucht, #1566), support jffs2 images. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6948 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar7-2.6/files/drivers')
-rw-r--r--target/linux/ar7-2.6/files/drivers/mtd/ar7part.c114
1 files changed, 56 insertions, 58 deletions
diff --git a/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c b/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c
index 0ae96a305f..587bb31bb2 100644
--- a/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c
+++ b/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c
@@ -29,7 +29,6 @@
#include <linux/mtd/partitions.h>
#include <linux/bootmem.h>
#include <linux/squashfs_fs.h>
-#include <linux/root_dev.h>
struct ar7_bin_rec {
unsigned int checksum;
@@ -43,85 +42,84 @@ static int create_mtd_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long origin)
{
- char sig[8];
struct ar7_bin_rec header;
- unsigned int offset, new_offset, len;
- struct squashfs_super_block sb;
- unsigned int block_size = 0x10000, pre_size = 0x10000,
- post_size = 0, root_offset = 0xe0000;
- unsigned int p = 3;
+ 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 = block_size;
+ ar7_parts[0].size = master->erasesize;
ar7_parts[0].mask_flags = MTD_WRITEABLE;
ar7_parts[1].name = "config";
- ar7_parts[1].size = block_size;
+ ar7_parts[1].offset = 0;
+ ar7_parts[1].size = master->erasesize;
ar7_parts[1].mask_flags = 0;
- master->read(master, block_size, 8, &len, sig);
- if (strncmp(sig, "TIENV0.8", 8)) {
- ar7_parts[1].offset = master->size - block_size;
- post_size = block_size;
- } else {
- ar7_parts[1].offset = block_size;
- pre_size = block_size * 2;
+ 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;
}
- ar7_parts[2].name = "linux";
- ar7_parts[2].offset = pre_size;
- ar7_parts[2].size = master->size - block_size * 2;
- ar7_parts[2].mask_flags = 0;
-
- offset = pre_size;
- master->read(master, offset, sizeof(header), &len, (u_char *)&header);
- if (header.checksum != 0xfeedfa42) {
- printk("Unknown magic: %08x\n", header.checksum);
- } else {
+ 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;
}
-
- ar7_parts[p].name = "rootfs";
- ar7_parts[p].offset = root_offset;
- ar7_parts[p].size = master->size - root_offset - post_size;
- ar7_parts[p++].mask_flags = 0;
-
- master->read(master, root_offset, sizeof(sb), &len, (u_char *)&sb);
- if (sb.s_magic == SQUASHFS_MAGIC) {
- printk("Squashfs detected (size %Ld)\n", sb.bytes_used);
- new_offset = root_offset + sb.bytes_used;
-
- if ((new_offset % master->erasesize) > 0)
- new_offset += master->erasesize -
- (new_offset % master->erasesize);
-
- ar7_parts[p].name = "rootfs_data";
- ar7_parts[p].offset = new_offset;
- ar7_parts[p].size = master->size - new_offset - post_size;
- ar7_parts[p - 1].size -= ar7_parts[p].size;
- ar7_parts[p - 1].mask_flags |= MTD_WRITEABLE;
- ar7_parts[p++].mask_flags = 0;
- ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p - 1);
- } else {
- printk("Squashfs not found. Moving rootfs partition to next erase block\n");
- if ((root_offset % master->erasesize) > 0)
- root_offset += master->erasesize -
- (root_offset % master->erasesize);
-
- ar7_parts[p].offset = root_offset;
- ar7_parts[p].size = master->size - root_offset - post_size;
- ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p);
+
+ 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 p;
+ return 4;
}
static struct mtd_part_parser ar7_parser = {