| Message ID | 20200525091544.17270-8-p.yadav@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mtd: spi-nor: add xSPI Octal DTR support | expand |
On Monday, May 25, 2020 12:15:32 PM EEST Pratyush Yadav wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the > content is safe > > JESD216 rev D makes BFPT 20 DWORDs. Update the BFPT size define to > reflect that. > > The check for rev A or later compared the BFPT header length with the > maximum BFPT length, BFPT_DWORD_MAX. Since BFPT_DWORD_MAX was 16, and so > was the BFPT length for both rev A and B, this check worked fine. But > now, since BFPT_DWORD_MAX is 20, it means this check will also stop BFPT > parsing for rev A or B, since their length is 16. > > So, instead check for BFPT_DWORD_MAX_JESD216 to stop BFPT parsing for > the first JESD216 version, and check for BFPT_DWORD_MAX_JESD216B for the > next two versions. > > Signed-off-by: Pratyush Yadav <p.yadav@ti.com> > --- > drivers/mtd/spi-nor/sfdp.c | 7 ++++++- > drivers/mtd/spi-nor/sfdp.h | 5 +++-- > 2 files changed, 9 insertions(+), 3 deletions(-) > > diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c > index 5cecc4ba2141..96960f2f3d7a 100644 > --- a/drivers/mtd/spi-nor/sfdp.c > +++ b/drivers/mtd/spi-nor/sfdp.c > @@ -549,7 +549,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, > SNOR_ERASE_TYPE_MASK; > > /* Stop here if not JESD216 rev A or later. */ > - if (bfpt_header->length < BFPT_DWORD_MAX) > + if (bfpt_header->length == BFPT_DWORD_MAX_JESD216) > return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, > params); > > @@ -605,6 +605,11 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, > return -EINVAL; > } > > + /* Stop here if JESD216 rev B. */ Applies for both rev A and rev B. Used the following comment instead: /* Stop here if not JESD216 rev C or later. */ > + if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B) > + return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, > + params); > + > return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, params); > } > > diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h > index e0a8ded04890..f8198af43a63 100644 > --- a/drivers/mtd/spi-nor/sfdp.h > +++ b/drivers/mtd/spi-nor/sfdp.h > @@ -10,11 +10,11 @@ > /* Basic Flash Parameter Table */ > > /* > - * JESD216 rev B defines a Basic Flash Parameter Table of 16 DWORDs. > + * JESD216 rev D defines a Basic Flash Parameter Table of 20 DWORDs. > * They are indexed from 1 but C arrays are indexed from 0. > */ > #define BFPT_DWORD(i) ((i) - 1) > -#define BFPT_DWORD_MAX 16 > +#define BFPT_DWORD_MAX 20 > > struct sfdp_bfpt { > u32 dwords[BFPT_DWORD_MAX]; > @@ -22,6 +22,7 @@ struct sfdp_bfpt { > > /* The first version of JESD216 defined only 9 DWORDs. */ > #define BFPT_DWORD_MAX_JESD216 9 > +#define BFPT_DWORD_MAX_JESD216B 16 > > /* 1st DWORD. */ > #define BFPT_DWORD1_FAST_READ_1_1_2 BIT(16) > -- > 2.26.2 Applied, thanks.
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index 5cecc4ba2141..96960f2f3d7a 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -549,7 +549,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, SNOR_ERASE_TYPE_MASK; /* Stop here if not JESD216 rev A or later. */ - if (bfpt_header->length < BFPT_DWORD_MAX) + if (bfpt_header->length == BFPT_DWORD_MAX_JESD216) return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, params); @@ -605,6 +605,11 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, return -EINVAL; } + /* Stop here if JESD216 rev B. */ + if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B) + return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, + params); + return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, params); } diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h index e0a8ded04890..f8198af43a63 100644 --- a/drivers/mtd/spi-nor/sfdp.h +++ b/drivers/mtd/spi-nor/sfdp.h @@ -10,11 +10,11 @@ /* Basic Flash Parameter Table */ /* - * JESD216 rev B defines a Basic Flash Parameter Table of 16 DWORDs. + * JESD216 rev D defines a Basic Flash Parameter Table of 20 DWORDs. * They are indexed from 1 but C arrays are indexed from 0. */ #define BFPT_DWORD(i) ((i) - 1) -#define BFPT_DWORD_MAX 16 +#define BFPT_DWORD_MAX 20 struct sfdp_bfpt { u32 dwords[BFPT_DWORD_MAX]; @@ -22,6 +22,7 @@ struct sfdp_bfpt { /* The first version of JESD216 defined only 9 DWORDs. */ #define BFPT_DWORD_MAX_JESD216 9 +#define BFPT_DWORD_MAX_JESD216B 16 /* 1st DWORD. */ #define BFPT_DWORD1_FAST_READ_1_1_2 BIT(16)
JESD216 rev D makes BFPT 20 DWORDs. Update the BFPT size define to reflect that. The check for rev A or later compared the BFPT header length with the maximum BFPT length, BFPT_DWORD_MAX. Since BFPT_DWORD_MAX was 16, and so was the BFPT length for both rev A and B, this check worked fine. But now, since BFPT_DWORD_MAX is 20, it means this check will also stop BFPT parsing for rev A or B, since their length is 16. So, instead check for BFPT_DWORD_MAX_JESD216 to stop BFPT parsing for the first JESD216 version, and check for BFPT_DWORD_MAX_JESD216B for the next two versions. Signed-off-by: Pratyush Yadav <p.yadav@ti.com> --- drivers/mtd/spi-nor/sfdp.c | 7 ++++++- drivers/mtd/spi-nor/sfdp.h | 5 +++-- 2 files changed, 9 insertions(+), 3 deletions(-)