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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>
This commit is contained in:
Huang Shijie 2013-03-15 11:01:00 +08:00 committed by David Woodhouse
parent f22d5f638b
commit ec6e87e378
1 changed files with 32 additions and 3 deletions
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33
drivers/mtd/nand/nand_base.c
View File

@ -3087,6 +3087,30 @@ static void nand_decode_bbm_options(struct mtd_info *mtd,
chip->bbt_options |= NAND_BBT_SCAN2NDPAGE; 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. * 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) if (!type)
type = nand_flash_ids; type = nand_flash_ids;
for (; type->name != NULL; type++) for (; type->name != NULL; type++) {
if (*dev_id == type->dev_id) 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; break;
}
}
chip->onfi_version = 0; chip->onfi_version = 0;
if (!type->name || !type->pagesize) { if (!type->name || !type->pagesize) {