diff options
| author | Huang Shijie <b32955@freescale.com> | 2013-03-15 04:01:00 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2013-04-05 14:20:42 +0200 |
| commit | ec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5 (patch) | |
| tree | df0472ecd029386423342cb95bd68500ab553b08 /drivers/mtd | |
| parent | mtd: add new fields to nand_flash_dev{} (diff) | |
| download | linux-ec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5.tar.xz linux-ec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5.zip | |
mtd: add the support to parse out the full-id nand type
When we meet a full-id nand type whose @id_len is not zero, we can use
the find_full_id_nand() to parse out the necessary information for a
nand chip.
If we meet a non full-id nand type, we can handle it in the legacy way.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Reviewed-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index f159d5f184bf..ae9790b659b1 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3087,6 +3087,30 @@ static void nand_decode_bbm_options(struct mtd_info *mtd, chip->bbt_options |= NAND_BBT_SCAN2NDPAGE; } +static inline bool is_full_id_nand(struct nand_flash_dev *type) +{ + return type->id_len; +} + +static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip, + struct nand_flash_dev *type, u8 *id_data, int *busw) +{ + if (!strncmp(type->id, id_data, type->id_len)) { + mtd->writesize = type->pagesize; + mtd->erasesize = type->erasesize; + mtd->oobsize = type->oobsize; + + chip->cellinfo = id_data[2]; + chip->chipsize = (uint64_t)type->chipsize << 20; + chip->options |= type->options; + + *busw = type->options & NAND_BUSWIDTH_16; + + return true; + } + return false; +} + /* * Get the flash and manufacturer id and lookup if the type is supported. */ @@ -3138,9 +3162,14 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, if (!type) type = nand_flash_ids; - for (; type->name != NULL; type++) - if (*dev_id == type->dev_id) - break; + for (; type->name != NULL; type++) { + if (is_full_id_nand(type)) { + if (find_full_id_nand(mtd, chip, type, id_data, &busw)) + goto ident_done; + } else if (*dev_id == type->dev_id) { + break; + } + } chip->onfi_version = 0; if (!type->name || !type->pagesize) { |