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authorHuang Shijie <b32955@freescale.com>2013-03-15 11:01:00 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2013-04-05 13:20:42 +0100
commitec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5 (patch)
treedf0472ecd029386423342cb95bd68500ab553b08 /drivers/mtd
parentf22d5f638b0ea40e7cceb4639a608bd2c3eff97c (diff)
downloadop-kernel-dev-ec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5.zip
op-kernel-dev-ec6e87e378e209fda3eb4dfdf3c6164afb5cc7f5.tar.gz
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.c35
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index f159d5f..ae9790b 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) {
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