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path: root/drivers/mtd/bcm47xxpart.c
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Diffstat (limited to 'drivers/mtd/bcm47xxpart.c')
-rw-r--r--drivers/mtd/bcm47xxpart.c49
1 files changed, 34 insertions, 15 deletions
diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c
index 6a1180502cc..63feb75cc8e 100644
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -19,12 +19,6 @@
/* 10 parts were found on sflash on Netgear WNDR4500 */
#define BCM47XXPART_MAX_PARTS 12
-/*
- * Amount of bytes we read when analyzing each block of flash memory.
- * Set it big enough to allow detecting partition and reading important data.
- */
-#define BCM47XXPART_BYTES_TO_READ 0x404
-
/* Magics */
#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
#define POT_MAGIC1 0x54544f50 /* POTT */
@@ -59,13 +53,21 @@ static int bcm47xxpart_parse(struct mtd_info *master,
uint32_t *buf;
size_t bytes_read;
uint32_t offset;
- uint32_t blocksize = 0x10000;
+ uint32_t blocksize = master->erasesize;
struct trx_header *trx;
+ int trx_part = -1;
+ int last_trx_part = -1;
+ int max_bytes_to_read = 0x8004;
+
+ if (blocksize <= 0x10000)
+ blocksize = 0x10000;
+ if (blocksize == 0x20000)
+ max_bytes_to_read = 0x18004;
/* Alloc */
parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS,
GFP_KERNEL);
- buf = kzalloc(BCM47XXPART_BYTES_TO_READ, GFP_KERNEL);
+ buf = kzalloc(max_bytes_to_read, GFP_KERNEL);
/* Parse block by block looking for magics */
for (offset = 0; offset <= master->size - blocksize;
@@ -80,7 +82,7 @@ static int bcm47xxpart_parse(struct mtd_info *master,
}
/* Read beginning of the block */
- if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
+ if (mtd_read(master, offset, max_bytes_to_read,
&bytes_read, (uint8_t *)buf) < 0) {
pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
offset);
@@ -95,9 +97,16 @@ static int bcm47xxpart_parse(struct mtd_info *master,
}
/* Standard NVRAM */
- if (buf[0x000 / 4] == NVRAM_HEADER) {
+ if (buf[0x000 / 4] == NVRAM_HEADER ||
+ buf[0x1000 / 4] == NVRAM_HEADER ||
+ buf[0x8000 / 4] == NVRAM_HEADER ||
+ (blocksize == 0x20000 && (
+ buf[0x10000 / 4] == NVRAM_HEADER ||
+ buf[0x11000 / 4] == NVRAM_HEADER ||
+ buf[0x18000 / 4] == NVRAM_HEADER))) {
bcm47xxpart_add_part(&parts[curr_part++], "nvram",
offset, 0);
+ offset = rounddown(offset, blocksize);
continue;
}
@@ -131,6 +140,10 @@ static int bcm47xxpart_parse(struct mtd_info *master,
if (buf[0x000 / 4] == TRX_MAGIC) {
trx = (struct trx_header *)buf;
+ trx_part = curr_part;
+ bcm47xxpart_add_part(&parts[curr_part++], "firmware",
+ offset, 0);
+
i = 0;
/* We have LZMA loader if offset[2] points to sth */
if (trx->offset[2]) {
@@ -154,6 +167,8 @@ static int bcm47xxpart_parse(struct mtd_info *master,
offset + trx->offset[i], 0);
i++;
+ last_trx_part = curr_part - 1;
+
/*
* We have whole TRX scanned, skip to the next part. Use
* roundown (not roundup), as the loop will increase
@@ -169,11 +184,15 @@ static int bcm47xxpart_parse(struct mtd_info *master,
* Assume that partitions end at the beginning of the one they are
* followed by.
*/
- for (i = 0; i < curr_part - 1; i++)
- parts[i].size = parts[i + 1].offset - parts[i].offset;
- if (curr_part > 0)
- parts[curr_part - 1].size =
- master->size - parts[curr_part - 1].offset;
+ for (i = 0; i < curr_part; i++) {
+ u64 next_part_offset = (i < curr_part - 1) ?
+ parts[i + 1].offset : master->size;
+
+ parts[i].size = next_part_offset - parts[i].offset;
+ if (i == last_trx_part && trx_part >= 0)
+ parts[trx_part].size = next_part_offset -
+ parts[trx_part].offset;
+ }
*pparts = parts;
return curr_part;