95 lines
2.7 KiB
Diff
95 lines
2.7 KiB
Diff
--- a/drivers/mtd/bcm47xxpart.c
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+++ b/drivers/mtd/bcm47xxpart.c
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@@ -15,6 +15,8 @@
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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+#include <uapi/linux/magic.h>
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+
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/*
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* NAND flash on Netgear R6250 was verified to contain 15 partitions.
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* This will result in allocating too big array for some old devices, but the
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@@ -39,7 +41,8 @@
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#define ML_MAGIC1 0x39685a42
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#define ML_MAGIC2 0x26594131
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#define TRX_MAGIC 0x30524448
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-#define SQSH_MAGIC 0x71736873 /* shsq */
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+#define SHSQ_MAGIC 0x71736873 /* shsq (weird ZTE H218N endianness) */
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+#define UBI_EC_MAGIC 0x23494255 /* UBI# */
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struct trx_header {
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uint32_t magic;
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@@ -50,7 +53,7 @@ struct trx_header {
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uint32_t offset[3];
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} __packed;
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-static void bcm47xxpart_add_part(struct mtd_partition *part, char *name,
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+static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name,
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u64 offset, uint32_t mask_flags)
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{
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part->name = name;
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@@ -58,6 +61,26 @@ static void bcm47xxpart_add_part(struct
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part->mask_flags = mask_flags;
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}
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+static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master,
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+ size_t offset)
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+{
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+ uint32_t buf;
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+ size_t bytes_read;
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+
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+ if (mtd_read(master, offset, sizeof(buf), &bytes_read,
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+ (uint8_t *)&buf) < 0) {
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+ pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
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+ offset);
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+ goto out_default;
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+ }
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+
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+ if (buf == UBI_EC_MAGIC)
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+ return "ubi";
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+
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+out_default:
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+ return "rootfs";
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+}
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+
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static int bcm47xxpart_parse(struct mtd_info *master,
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struct mtd_partition **pparts,
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struct mtd_part_parser_data *data)
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@@ -73,8 +96,12 @@ static int bcm47xxpart_parse(struct mtd_
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int last_trx_part = -1;
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int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
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- if (blocksize <= 0x10000)
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- blocksize = 0x10000;
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+ /*
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+ * Some really old flashes (like AT45DB*) had smaller erasesize-s, but
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+ * partitions were aligned to at least 0x1000 anyway.
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+ */
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+ if (blocksize < 0x1000)
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+ blocksize = 0x1000;
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/* Alloc */
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parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS,
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@@ -186,8 +213,11 @@ static int bcm47xxpart_parse(struct mtd_
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* we want to have jffs2 (overlay) in the same mtd.
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*/
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if (trx->offset[i]) {
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+ const char *name;
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+
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+ name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]);
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bcm47xxpart_add_part(&parts[curr_part++],
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- "rootfs",
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+ name,
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offset + trx->offset[i],
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0);
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i++;
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@@ -205,7 +235,8 @@ static int bcm47xxpart_parse(struct mtd_
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}
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/* Squashfs on devices not using TRX */
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- if (buf[0x000 / 4] == SQSH_MAGIC) {
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+ if (le32_to_cpu(buf[0x000 / 4]) == SQUASHFS_MAGIC ||
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+ buf[0x000 / 4] == SHSQ_MAGIC) {
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bcm47xxpart_add_part(&parts[curr_part++], "rootfs",
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offset, 0);
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continue;
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