From d928a259385dc6fca3956b7775c588f21c0b50fc Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Thu, 6 Nov 2014 11:24:33 +0800 Subject: [PATCH] mtd: spi-nor: remove the jedec_id/ext_id The "id" array contains all the information about the JEDEC and the manufacturer ID info. This patch removes the jedec_id/ext_id from flash_info. Signed-off-by: Huang Shijie Signed-off-by: Brian Norris --- drivers/mtd/spi-nor/spi-nor.c | 98 ++++++++++++++++++++----------------------- 1 file changed, 45 insertions(+), 53 deletions(-) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 786344f..6d03622 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -26,7 +26,38 @@ /* Define max times to check status register before we give up. */ #define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */ -#define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16) +#define SPI_NOR_MAX_ID_LEN 6 + +struct flash_info { + /* + * This array stores the ID bytes. + * The first three bytes are the JEDIC ID. + * JEDEC ID zero means "no ID" (mostly older chips). + */ + u8 id[SPI_NOR_MAX_ID_LEN]; + u8 id_len; + + /* The size listed here is what works with SPINOR_OP_SE, which isn't + * necessarily called a "sector" by the vendor. + */ + unsigned sector_size; + u16 n_sectors; + + u16 page_size; + u16 addr_width; + + u16 flags; +#define SECT_4K 0x01 /* SPINOR_OP_BE_4K works uniformly */ +#define SPI_NOR_NO_ERASE 0x02 /* No erase command needed */ +#define SST_WRITE 0x04 /* use SST byte programming */ +#define SPI_NOR_NO_FR 0x08 /* Can't do fastread */ +#define SECT_4K_PMC 0x10 /* SPINOR_OP_BE_4K_PMC works uniformly */ +#define SPI_NOR_DUAL_READ 0x20 /* Flash supports Dual Read */ +#define SPI_NOR_QUAD_READ 0x40 /* Flash supports Quad Read */ +#define USE_FSR 0x80 /* use flag status register */ +}; + +#define JEDEC_MFR(info) ((info)->id[0]) static const struct spi_device_id *spi_nor_match_id(const char *name); @@ -138,13 +169,14 @@ static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd) } /* Enable/disable 4-byte addressing mode. */ -static inline int set_4byte(struct spi_nor *nor, u32 jedec_id, int enable) +static inline int set_4byte(struct spi_nor *nor, struct flash_info *info, + int enable) { int status; bool need_wren = false; u8 cmd; - switch (JEDEC_MFR(jedec_id)) { + switch (JEDEC_MFR(info)) { case CFI_MFR_ST: /* Micron, actually */ /* Some Micron need WREN command; all will accept it */ need_wren = true; @@ -418,49 +450,9 @@ err: return ret; } -#define SPI_NOR_MAX_ID_LEN 6 - -struct flash_info { - /* JEDEC id zero means "no ID" (most older chips); otherwise it has - * a high byte of zero plus three data bytes: the manufacturer id, - * then a two byte device id. - */ - u32 jedec_id; - u16 ext_id; - - /* - * This array stores the ID bytes. - * The first three bytes are the JEDIC ID. - * JEDEC ID zero means "no ID" (mostly older chips). - */ - u8 id[SPI_NOR_MAX_ID_LEN]; - u8 id_len; - - /* The size listed here is what works with SPINOR_OP_SE, which isn't - * necessarily called a "sector" by the vendor. - */ - unsigned sector_size; - u16 n_sectors; - - u16 page_size; - u16 addr_width; - - u16 flags; -#define SECT_4K 0x01 /* SPINOR_OP_BE_4K works uniformly */ -#define SPI_NOR_NO_ERASE 0x02 /* No erase command needed */ -#define SST_WRITE 0x04 /* use SST byte programming */ -#define SPI_NOR_NO_FR 0x08 /* Can't do fastread */ -#define SECT_4K_PMC 0x10 /* SPINOR_OP_BE_4K_PMC works uniformly */ -#define SPI_NOR_DUAL_READ 0x20 /* Flash supports Dual Read */ -#define SPI_NOR_QUAD_READ 0x40 /* Flash supports Quad Read */ -#define USE_FSR 0x80 /* use flag status register */ -}; - /* Used when the "_ext_id" is two bytes at most */ #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \ ((kernel_ulong_t)&(struct flash_info) { \ - .jedec_id = (_jedec_id), \ - .ext_id = (_ext_id), \ .id = { \ ((_jedec_id) >> 16) & 0xff, \ ((_jedec_id) >> 8) & 0xff, \ @@ -878,11 +870,11 @@ static int spansion_quad_enable(struct spi_nor *nor) return 0; } -static int set_quad_mode(struct spi_nor *nor, u32 jedec_id) +static int set_quad_mode(struct spi_nor *nor, struct flash_info *info) { int status; - switch (JEDEC_MFR(jedec_id)) { + switch (JEDEC_MFR(info)) { case CFI_MFR_MACRONIX: status = macronix_quad_enable(nor); if (status) { @@ -931,7 +923,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) info = (void *)id->driver_data; - if (info->jedec_id) { + if (info->id_len) { const struct spi_device_id *jid; jid = spi_nor_read_id(nor); @@ -959,9 +951,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) * up with the software protection bits set */ - if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ATMEL || - JEDEC_MFR(info->jedec_id) == CFI_MFR_INTEL || - JEDEC_MFR(info->jedec_id) == CFI_MFR_SST) { + if (JEDEC_MFR(info) == CFI_MFR_ATMEL || + JEDEC_MFR(info) == CFI_MFR_INTEL || + JEDEC_MFR(info) == CFI_MFR_SST) { write_enable(nor); write_sr(nor, 0); } @@ -976,7 +968,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) mtd->_read = spi_nor_read; /* nor protection support for STmicro chips */ - if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ST) { + if (JEDEC_MFR(info) == CFI_MFR_ST) { mtd->_lock = spi_nor_lock; mtd->_unlock = spi_nor_unlock; } @@ -1029,7 +1021,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) /* Quad/Dual-read mode takes precedence over fast/normal */ if (mode == SPI_NOR_QUAD && info->flags & SPI_NOR_QUAD_READ) { - ret = set_quad_mode(nor, info->jedec_id); + ret = set_quad_mode(nor, info); if (ret) { dev_err(dev, "quad mode not supported\n"); return ret; @@ -1065,7 +1057,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) else if (mtd->size > 0x1000000) { /* enable 4-byte addressing if the device exceeds 16MiB */ nor->addr_width = 4; - if (JEDEC_MFR(info->jedec_id) == CFI_MFR_AMD) { + if (JEDEC_MFR(info) == CFI_MFR_AMD) { /* Dedicated 4-byte command set */ switch (nor->flash_read) { case SPI_NOR_QUAD: @@ -1086,7 +1078,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) nor->erase_opcode = SPINOR_OP_SE_4B; mtd->erasesize = info->sector_size; } else - set_4byte(nor, info->jedec_id, 1); + set_4byte(nor, info, 1); } else { nor->addr_width = 3; } -- 2.7.4