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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-03-03 01:33:54 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-03-03 01:33:54 +0100 |
commit | 48476df99894492a0f7239f2f3c9a2dde4ff38e2 (patch) | |
tree | 5a1b80f20449968f0de6e5bfbcda5e360e31ba1f /drivers/mtd/bcm47xxpart.c | |
parent | Merge tag 'dm-3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/a... (diff) | |
parent | mtd: map: BUG() in non handled cases (diff) | |
download | linux-48476df99894492a0f7239f2f3c9a2dde4ff38e2.tar.xz linux-48476df99894492a0f7239f2f3c9a2dde4ff38e2.zip |
Merge tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd
Pull MTD update from David Woodhouse:
"Fairly unexciting MTD merge for 3.9:
- misc clean-ups in the MTD command-line partitioning parser
(cmdlinepart)
- add flash locking support for STmicro chips serial flash chips, as
well as for CFI command set 2 chips.
- new driver for the ELM error correction HW module found in various
TI chips, enable the OMAP NAND driver to use the ELM HW error
correction
- added number of new serial flash IDs
- various fixes and improvements in the gpmi NAND driver
- bcm47xx NAND driver improvements
- make the mtdpart module actually removable"
* tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd: (45 commits)
mtd: map: BUG() in non handled cases
mtd: bcm47xxnflash: use pr_fmt for module prefix in messages
mtd: davinci_nand: Use managed resources
mtd: mtd_torturetest can cause stack overflows
mtd: physmap_of: Convert device allocation to managed devm_kzalloc()
mtd: at91: atmel_nand: for PMECC, add code to check the ONFI parameter ECC requirement.
mtd: atmel_nand: make pmecc-cap, pmecc-sector-size in dts is optional.
mtd: atmel_nand: avoid to report an error when lookup table offset is 0.
mtd: bcm47xxsflash: adjust names of bus-specific functions
mtd: bcm47xxpart: improve probing of nvram partition
mtd: bcm47xxpart: add support for other erase sizes
mtd: bcm47xxnflash: register this as normal driver
mtd: bcm47xxnflash: fix message
mtd: bcm47xxsflash: register this as normal driver
mtd: bcm47xxsflash: write number of written bytes
mtd: gpmi: add sanity check for the ECC
mtd: gpmi: set the Golois Field bit for mx6q's BCH
mtd: devices: elm: Removes <xx> literals in elm DT node
mtd: gpmi: fix a dereferencing freed memory error
mtd: fix the wrong timeo for panic_nand_wait()
...
Diffstat (limited to 'drivers/mtd/bcm47xxpart.c')
-rw-r--r-- | drivers/mtd/bcm47xxpart.c | 49 |
1 files changed, 34 insertions, 15 deletions
diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c index 6a1180502cc1..63feb75cc8e0 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; |