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

SVN-Revision: 7172

target/linux/brcm47xx-2.6/config/default

@@ -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

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

@@ -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) {
+	/* Move the fs outside of the trx */
-		printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used);
+	part->size = 0;
-
-		/* 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;
-	}
 
 	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;