diff options
Diffstat (limited to 'drivers/mtd/spi-nor/spansion.c')
| -rw-r--r-- | drivers/mtd/spi-nor/spansion.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c index a0296c871634..8498c7003d88 100644 --- a/drivers/mtd/spi-nor/spansion.c +++ b/drivers/mtd/spi-nor/spansion.c @@ -785,8 +785,46 @@ s25fs_s_nor_post_bfpt_fixups(struct spi_nor *nor, return 0; } +static void s25fs_s_nor_smpt_read_dummy(const struct spi_nor *nor, + u8 *read_dummy) +{ + /* + * The configuration detection dwords in S25FS-S SMPT has 65h as + * command instruction and 'variable' as configuration detection command + * latency. Set 8 dummy cycles as it is factory default for 65h (read + * any register) op. + */ + *read_dummy = 8; +} + +static void s25fs_s_nor_smpt_map_id_dummy(const struct spi_nor *nor, u8 *map_id) +{ + /* + * The S25FS512S chip supports: + * - Hybrid sector option which has physical set of eight 4-KB sectors + * and one 224-KB sector at the top or bottom of address space with + * all remaining sectors of 256-KB + * - Uniform sector option which has uniform 256-KB sectors + * + * On the other hand, the datasheet rev.O Table 71 on page 153 JEDEC + * Sector Map Parameter Dword-6 Config. Detect-3 does use CR3NV[1] to + * discern 64-KB(CR3NV[1]=0) and 256-KB(CR3NV[1]=1) uniform sectors + * device configuration. And in section 7.5.5.1 Configuration Register 3 + * Non-volatile (CR3NV) page 61, the CR3NV[1] is RFU Reserved for Future + * Use and set to 0, which means 64-KB uniform. Since the device does + * not support 64-KB uniform sectors in any configuration, parsing SMPT + * table cannot find a valid sector map entry and fails. Fix this up by + * setting SMPT by overwriting the CR3NV[1] value to 1, as the table + * expects. + */ + if (nor->params->size == SZ_64M) + *map_id |= BIT(0); +} + static const struct spi_nor_fixups s25fs_s_nor_fixups = { .post_bfpt = s25fs_s_nor_post_bfpt_fixups, + .smpt_read_dummy = s25fs_s_nor_smpt_read_dummy, + .smpt_map_id = s25fs_s_nor_smpt_map_id_dummy, }; static const struct flash_info spansion_nor_parts[] = { |