From: Takahiro Kuwano Takahiro.Kuwano@infineon.com
The current S25FS512S support has following issues that need to be fixed.
- Non-uniform sectors by factory default. The setting needs to be checked and assign erase hook as needed. - Page size is wrongly advertised in SFDP. - READ_1_1_2 (3Bh/3Ch), READ_1_1_4 (6Bh/6Ch), and PP_1_1_4 (32h/34h) are not supported. - Bank Address Register (BAR) is not supported.
In addtion, volatile version of Quad Enable is used for safety.
For future use, the fixups is assigned for S25FS-S family.
The datasheet can be found in the following link. https://www.cypress.com/file/216376/download
Tested on Xilinx Zynq-7000 FPGA board.
Signed-off-by: Takahiro Kuwano Takahiro.Kuwano@infineon.com --- Changes in v2: - Add #define S25FS_S_RDAR_DUMMY and remove hard-coding - Remove #ifdef CONFIG_SPI_FLASH_BAR
drivers/mtd/spi/spi-nor-core.c | 108 +++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+)
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index f1b4e5ea8e..349b2f3f23 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -3099,6 +3099,109 @@ static int spi_nor_setup(struct spi_nor *nor, const struct flash_info *info, }
#ifdef CONFIG_SPI_FLASH_SPANSION + +/* Number of dummy cycle for Read Any Register (RDAR) op. */ +#define S25FS_S_RDAR_DUMMY 8 + +static int s25fs_s_quad_enable(struct spi_nor *nor) +{ + return spansion_quad_enable_volatile(nor, 0, S25FS_S_RDAR_DUMMY); +} + +static int s25fs_s_erase_non_uniform(struct spi_nor *nor, loff_t addr) +{ + /* Support 8 x 4KB sectors at bottom */ + return spansion_erase_non_uniform(nor, addr, SPINOR_OP_BE_4K_4B, 0, + SZ_32K); +} + +static int s25fs_s_setup(struct spi_nor *nor, const struct flash_info *info, + const struct spi_nor_flash_parameter *params) +{ + int ret; + u8 cfr3v; + + /* Bank Address Register is not supported */ + if (CONFIG_IS_ENABLED(SPI_FLASH_BAR)) + return -ENOTSUPP; + + /* + * Read CR3V to check if uniform sector is selected. If not, assign an + * erase hook that supports non-uniform erase. + */ + ret = spansion_read_any_reg(nor, SPINOR_REG_ADDR_CFR3V, + S25FS_S_RDAR_DUMMY, &cfr3v); + if (ret) + return ret; + if (!(cfr3v & CFR3V_UNHYSA)) + nor->erase = s25fs_s_erase_non_uniform; + + return spi_nor_default_setup(nor, info, params); +} + +static void s25fs_s_default_init(struct spi_nor *nor) +{ + nor->setup = s25fs_s_setup; +} + +static int s25fs_s_post_bfpt_fixup(struct spi_nor *nor, + const struct sfdp_parameter_header *header, + const struct sfdp_bfpt *bfpt, + struct spi_nor_flash_parameter *params) +{ + int ret; + u8 cfr3v; + + /* The erase size is set to 4K from BFPT, but it's wrong. Fix it. */ + nor->erase_opcode = SPINOR_OP_SE; + nor->mtd.erasesize = nor->info->sector_size; + + if (params->size > SZ_16M) { + ret = nor->write_reg(nor, SPINOR_OP_EN4B, NULL, 0); + if (ret) + return ret; + nor->addr_width = 4; + } else { + nor->addr_width = 3; + } + + /* + * The page_size is set to 512B from BFPT, but it actually depends on + * the configuration register. Look up the CFR3V and determine the + * page_size. + */ + ret = spansion_read_any_reg(nor, SPINOR_REG_ADDR_CFR3V, + S25FS_S_RDAR_DUMMY, &cfr3v); + if (ret) + return ret; + + if (cfr3v & CFR3V_PGMBUF) + params->page_size = 512; + else + params->page_size = 256; + + return 0; +} + +static void s25fs_s_post_sfdp_fixup(struct spi_nor *nor, + struct spi_nor_flash_parameter *params) +{ + /* READ_1_1_2 is not supported */ + params->hwcaps.mask &= ~SNOR_HWCAPS_READ_1_1_2; + /* READ_1_1_4 is not supported */ + params->hwcaps.mask &= ~SNOR_HWCAPS_READ_1_1_4; + /* PP_1_1_4 is not supported */ + params->hwcaps.mask &= ~SNOR_HWCAPS_PP_1_1_4; + /* Use volatile register to enable quad */ + params->quad_enable = s25fs_s_quad_enable; +} + +static struct spi_nor_fixups s25fs_s_fixups = { + .default_init = s25fs_s_default_init, + .post_bfpt = s25fs_s_post_bfpt_fixup, + .post_sfdp = s25fs_s_post_sfdp_fixup, +}; + static int s25hx_t_mdp_ready(struct spi_nor *nor) { u32 addr; @@ -3646,6 +3749,11 @@ void spi_nor_set_fixups(struct spi_nor *nor) break; } } + + /* For FS-S (family ID = 0x81) */ + if (JEDEC_MFR(nor->info) == SNOR_MFR_SPANSION && + nor->info->id[5] == 0x81) + nor->fixups = &s25fs_s_fixups; #endif
#ifdef CONFIG_SPI_FLASH_S28HS512T