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mtd: nand: mxs_nand_spl: add mxs_flash_full_ident

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For now, the existing SPL MXS NAND driver only supports to identify
ONFi-compliant NAND chips. In order to allow identifying
non-ONFi-compliant chips add `mxs_flash_full_ident()` which uses the
`nand_get_flash_type()` functionality from `nand_base.c` to lookup
for supported NAND chips in the chip ID list.

For compatibility reason the full identification support is only
available if the config option `CONFIG_SPL_NAND_IDENT` is enabled.

The lookup was tested on a custom i.MX6ULL board with a Toshiba
TC58NVG1S3HTAI0 NAND chip.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
This commit is contained in:
Jörg Krause 2018-01-14 19:26:40 +01:00 committed by Stefano Babic
parent f3f2af3bdf
commit 4368f85359
1 changed files with 28 additions and 0 deletions
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28
drivers/mtd/nand/mxs_nand_spl.c
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@ -49,6 +49,28 @@ static void mxs_nand_command(struct mtd_info *mtd, unsigned int command,
}
}
#if defined (CONFIG_SPL_NAND_IDENT)
/* Trying to detect the NAND flash using ONFi, JEDEC, and (extended) IDs */
static int mxs_flash_full_ident(struct mtd_info *mtd)
{
int nand_maf_id, nand_dev_id;
struct nand_chip *chip = mtd_to_nand(mtd);
struct nand_flash_dev *type;
type = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, NULL);
if (IS_ERR(type)) {
chip->select_chip(mtd, -1);
return PTR_ERR(type);
}
return 0;
}
#else
/* Trying to detect the NAND flash using ONFi only */
static int mxs_flash_onfi_ident(struct mtd_info *mtd)
{
register struct nand_chip *chip = mtd_to_nand(mtd);
@ -109,10 +131,16 @@ static int mxs_flash_onfi_ident(struct mtd_info *mtd)
return 0;
}
#endif /* CONFIG_SPL_NAND_IDENT */
static int mxs_flash_ident(struct mtd_info *mtd)
{
int ret;
#if defined (CONFIG_SPL_NAND_IDENT)
ret = mxs_flash_full_ident(mtd);
#else
ret = mxs_flash_onfi_ident(mtd);
#endif
return ret;
}