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brcm47xx: mtd map driver cleanup - reuse generic mtd rootfs split

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7172 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2007-05-10 13:56:54 +00:00
parent 38c6cb915b
commit c5eea72dc5
2 changed files with 3 additions and 46 deletions
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2
target/linux/brcm47xx-2.6/config/default
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@ -196,7 +196,7 @@ CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_SPLIT_ROOTFS is not set
CONFIG_MTD_SPLIT_ROOTFS=y
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_NETFILTER_XT_MATCH_COMMENT is not set

47
target/linux/brcm47xx-2.6/files/drivers/mtd/maps/bcm47xx-flash.c
View File

@ -46,8 +46,6 @@
#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif
#include <linux/squashfs_fs.h>
#include <linux/jffs2.h>
#include <linux/crc32.h>
#ifdef CONFIG_SSB
#include <linux/ssb/ssb.h>
@ -95,7 +93,6 @@ static struct mtd_partition bcm947xx_parts[] = {
{ name: "linux", offset: 0, size: 0, },
{ name: "rootfs", offset: 0, size: 0, },
{ name: "nvram", offset: 0, size: 0, },
{ name: "rootfs_data", offset: 0, size: 0, },
{ name: NULL, },
};
@ -259,24 +256,8 @@ find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
return 0;
if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used);
/* Update the squashfs partition size based on the superblock info */
part->size = sb->bytes_used;
len = part->offset + part->size;
len += (mtd->erasesize - 1);
len &= ~(mtd->erasesize - 1);
part->size = len - part->offset;
} else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) {
printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name);
/* Move the squashfs outside of the trx */
part->size = 0;
} else {
printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name);
return 0;
}
/* Move the fs outside of the trx */
part->size = 0;
if (trx.len != part->offset + part->size - off) {
/* Update the trx offsets and length */
@ -355,32 +336,8 @@ init_mtd_partitions(struct mtd_info *mtd, size_t size)
/* find and size rootfs */
if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
/* entirely jffs2 */
bcm947xx_parts[4].name = NULL;
bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
bcm947xx_parts[3].size;
} else {
/* legacy setup */
/* calculate leftover flash, and assign it to the jffs2 partition */
if (cfe_size != 384 * 1024) {
bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
bcm947xx_parts[2].size;
if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
bcm947xx_parts[4].offset += mtd->erasesize -
(bcm947xx_parts[4].offset % mtd->erasesize);
}
bcm947xx_parts[4].size = bcm947xx_parts[3].offset -
bcm947xx_parts[4].offset;
} else {
bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
bcm947xx_parts[2].size;
if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
bcm947xx_parts[4].offset += mtd->erasesize -
(bcm947xx_parts[4].offset % mtd->erasesize);
}
bcm947xx_parts[4].size = size - bcm947xx_parts[3].size -
bcm947xx_parts[4].offset;
}
}
return bcm947xx_parts;