From 6296b8ca9f1d3aeeb3ecbdfbbe6496d1b8297597 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Tue, 27 Jan 2015 22:08:14 +0000 Subject: kernel: backport queued bcm47xxpart changes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Rafał Miłecki SVN-Revision: 44156 --- .../041-mtd-bcm47xxpart-backports-from-3.20.patch | 95 ++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 target/linux/generic/patches-3.18/041-mtd-bcm47xxpart-backports-from-3.20.patch (limited to 'target/linux/generic/patches-3.18/041-mtd-bcm47xxpart-backports-from-3.20.patch') diff --git a/target/linux/generic/patches-3.18/041-mtd-bcm47xxpart-backports-from-3.20.patch b/target/linux/generic/patches-3.18/041-mtd-bcm47xxpart-backports-from-3.20.patch new file mode 100644 index 0000000000..59180c2084 --- /dev/null +++ b/target/linux/generic/patches-3.18/041-mtd-bcm47xxpart-backports-from-3.20.patch @@ -0,0 +1,95 @@ +--- a/drivers/mtd/bcm47xxpart.c ++++ b/drivers/mtd/bcm47xxpart.c +@@ -15,6 +15,8 @@ + #include + #include + ++#include ++ + /* + * NAND flash on Netgear R6250 was verified to contain 15 partitions. + * This will result in allocating too big array for some old devices, but the +@@ -39,7 +41,8 @@ + #define ML_MAGIC1 0x39685a42 + #define ML_MAGIC2 0x26594131 + #define TRX_MAGIC 0x30524448 +-#define SQSH_MAGIC 0x71736873 /* shsq */ ++#define SHSQ_MAGIC 0x71736873 /* shsq (weird ZTE H218N endianness) */ ++#define UBI_EC_MAGIC 0x23494255 /* UBI# */ + + struct trx_header { + uint32_t magic; +@@ -50,7 +53,7 @@ struct trx_header { + uint32_t offset[3]; + } __packed; + +-static void bcm47xxpart_add_part(struct mtd_partition *part, char *name, ++static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name, + u64 offset, uint32_t mask_flags) + { + part->name = name; +@@ -58,6 +61,26 @@ static void bcm47xxpart_add_part(struct + part->mask_flags = mask_flags; + } + ++static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master, ++ size_t offset) ++{ ++ uint32_t buf; ++ size_t bytes_read; ++ ++ if (mtd_read(master, offset, sizeof(buf), &bytes_read, ++ (uint8_t *)&buf) < 0) { ++ pr_err("mtd_read error while parsing (offset: 0x%X)!\n", ++ offset); ++ goto out_default; ++ } ++ ++ if (buf == UBI_EC_MAGIC) ++ return "ubi"; ++ ++out_default: ++ return "rootfs"; ++} ++ + static int bcm47xxpart_parse(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +@@ -73,8 +96,12 @@ static int bcm47xxpart_parse(struct mtd_ + int last_trx_part = -1; + int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, }; + +- if (blocksize <= 0x10000) +- blocksize = 0x10000; ++ /* ++ * Some really old flashes (like AT45DB*) had smaller erasesize-s, but ++ * partitions were aligned to at least 0x1000 anyway. ++ */ ++ if (blocksize < 0x1000) ++ blocksize = 0x1000; + + /* Alloc */ + parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS, +@@ -186,8 +213,11 @@ static int bcm47xxpart_parse(struct mtd_ + * we want to have jffs2 (overlay) in the same mtd. + */ + if (trx->offset[i]) { ++ const char *name; ++ ++ name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]); + bcm47xxpart_add_part(&parts[curr_part++], +- "rootfs", ++ name, + offset + trx->offset[i], + 0); + i++; +@@ -205,7 +235,8 @@ static int bcm47xxpart_parse(struct mtd_ + } + + /* Squashfs on devices not using TRX */ +- if (buf[0x000 / 4] == SQSH_MAGIC) { ++ if (le32_to_cpu(buf[0x000 / 4]) == SQUASHFS_MAGIC || ++ buf[0x000 / 4] == SHSQ_MAGIC) { + bcm47xxpart_add_part(&parts[curr_part++], "rootfs", + offset, 0); + continue; -- cgit v1.2.3