From: Takahiro Kuwano Takahiro.Kuwano@infineon.com
The nor->ready() and spansion_sr_ready() introduced earlier in this series are used for multi-die package parts.
The nor->quad_enable() sets the volatile QE bit on each die.
The nor->erase() is hooked if the device is not configured to uniform sectors, assuming it has 32 x 4KB sectors overlaid on bottom address. Other configurations, top and split, are not supported at this point. Will submit additional patches to support it as needed.
The post_bfpt/sfdp() fixes the params wrongly advertised in SFDP.
Signed-off-by: Takahiro Kuwano Takahiro.Kuwano@infineon.com --- Changes in v8: - No change
Changes in v7: - Fix return type of s25hx_t_erase_non_uniform() to 'int'
Changes in v6: - Remove mtd.writesize fixup - Check if uniform sector is selected in multi-die package parts - Fix some other minor issues
Changes in v5: - Add s25hx_t_erase_non_uniform() - Change mtd.writesize and mtd.flags in s25hx_t_setup() - Fix page size and erase size issues in s25hx_t_post_bfpt_fixup()
drivers/mtd/spi/spi-nor-core.c | 142 +++++++++++++++++++++++++++++++++ include/linux/mtd/spi-nor.h | 3 + 2 files changed, 145 insertions(+)
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index c2b26cc2fd..2b48404c04 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -2678,8 +2678,150 @@ static int spi_nor_init(struct spi_nor *nor) return 0; }
+#ifdef CONFIG_SPI_FLASH_SPANSION +static int s25hx_t_mdp_ready(struct spi_nor *nor) +{ + u32 addr; + int ret; + + for (addr = 0; addr < nor->mtd.size; addr += SZ_128M) { + ret = spansion_sr_ready(nor, addr, 0); + if (!ret) + return ret; + } + + return 1; +} + +static int s25hx_t_quad_enable(struct spi_nor *nor) +{ + u32 addr; + int ret; + + for (addr = 0; addr < nor->mtd.size; addr += SZ_128M) { + ret = spansion_quad_enable_volatile(nor, addr, 0); + if (ret) + return ret; + } + + return 0; +} + +static int s25hx_t_erase_non_uniform(struct spi_nor *nor, loff_t addr) +{ + /* Support 32 x 4KB sectors at bottom */ + return spansion_erase_non_uniform(nor, addr, SPINOR_OP_BE_4K_4B, 0, + SZ_128K); +} + +static int s25hx_t_setup(struct spi_nor *nor, const struct flash_info *info, + const struct spi_nor_flash_parameter *params, + const struct spi_nor_hwcaps *hwcaps) +{ + int ret; + u8 cfr3v; + +#ifdef CONFIG_SPI_FLASH_BAR + return -ENOTSUPP; /* Bank Address Register is not supported */ +#endif + /* + * Read CFR3V 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, 0, &cfr3v); + if (ret) + return ret; + if (!(cfr3v & CFR3V_UNHYSA)) + nor->erase = s25hx_t_erase_non_uniform; + + /* + * For the multi-die package parts, the ready() hook is needed to check + * all dies' status via read any register. + */ + if (nor->mtd.size > SZ_128M) + nor->ready = s25hx_t_mdp_ready; + + return spi_nor_default_setup(nor, info, params, hwcaps); +} + +static void s25hx_t_default_init(struct spi_nor *nor) +{ + nor->setup = s25hx_t_setup; +} + +static int s25hx_t_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; + u32 addr; + u8 cfr3v; + + /* erase size in case it is set to 4K from BFPT */ + nor->erase_opcode = SPINOR_OP_SE_4B; + nor->mtd.erasesize = nor->info->sector_size; + + ret = set_4byte(nor, nor->info, 1); + if (ret) + return ret; + nor->addr_width = 4; + + /* + * 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. For multi-die package parts, use 512B only when the all + * dies are configured to 512B buffer. + */ + for (addr = 0; addr < params->size; addr += SZ_128M) { + ret = spansion_read_any_reg(nor, addr + SPINOR_REG_ADDR_CFR3V, + 0, &cfr3v); + if (ret) + return ret; + + if (!(cfr3v & CFR3V_PGMBUF)) { + params->page_size = 256; + return 0; + } + } + params->page_size = 512; + + return 0; +} + +static void s25hx_t_post_sfdp_fixup(struct spi_nor *nor, + struct spi_nor_flash_parameter *params) +{ + /* READ_FAST_4B (0Ch) requires mode cycles*/ + params->reads[SNOR_CMD_READ_FAST].num_mode_clocks = 8; + /* 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 = s25hx_t_quad_enable; +} + +static struct spi_nor_fixups s25hx_t_fixups = { + .default_init = s25hx_t_default_init, + .post_bfpt = s25hx_t_post_bfpt_fixup, + .post_sfdp = s25hx_t_post_sfdp_fixup, +}; +#endif + void spi_nor_set_fixups(struct spi_nor *nor) { +#ifdef CONFIG_SPI_FLASH_SPANSION + if (JEDEC_MFR(nor->info) == SNOR_MFR_CYPRESS) { + switch (nor->info->id[1]) { + case 0x2a: /* S25HL (QSPI, 3.3V) */ + case 0x2b: /* S25HS (QSPI, 1.8V) */ + nor->fixups = &s25hx_t_fixups; + break; + + default: + break; + } + } +#endif }
int spi_nor_scan(struct spi_nor *nor) diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 0b295c3eec..7bc946064a 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -126,6 +126,9 @@ #define SPINOR_OP_WRAR 0x71 /* Write any register */ #define SPINOR_REG_ADDR_STR1V 0x00800000 #define SPINOR_REG_ADDR_CFR1V 0x00800002 +#define SPINOR_REG_ADDR_CFR3V 0x00800004 +#define CFR3V_UNHYSA BIT(3) /* Uniform sectors or not */ +#define CFR3V_PGMBUF BIT(4) /* Program buffer size */
/* Used for Micron flashes only. */ #define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */