Bank/Extended addr commands are specific to particular flash vendor so discover them based on the idocode0.
Assign the discovered bank commands to spi_flash members so-that the bank read/write will use their specific operations.
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- Changes for v4: - none Changes for v3: - none Changes for v2: - none
drivers/mtd/spi/spi_flash.c | 21 +++++++++++++++++++++ drivers/mtd/spi/spi_flash_internal.h | 14 ++++++++++++++ include/spi_flash.h | 2 ++ 3 files changed, 37 insertions(+)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9ddd070..9c90f00 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -304,6 +304,27 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) return 0; }
+int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0) +{ + /* discover bank cmds */ + switch (idcode0) { + case SPI_FLASH_SPANSION_IDCODE0: + flash->bank_cmd[0] = CMD_BANKADDR_BRRD; + flash->bank_cmd[1] = CMD_BANKADDR_BRWR; + break; + case SPI_FLASH_STMICRO_IDCODE0: + case SPI_FLASH_WINBOND_IDCODE0: + flash->bank_cmd[0] = CMD_EXTNADDR_RDEAR; + flash->bank_cmd[1] = CMD_EXTNADDR_WREAR; + break; + default: + printf("SF: Unsupported bank commands %02x\n", idcode0); + return -1; + } + + return 0; +} + #ifdef CONFIG_OF_CONTROL int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash) { diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 772fef6..db6c444 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -28,6 +28,17 @@ #define CMD_ERASE_64K 0xd8 #define CMD_ERASE_CHIP 0xc7
+/* Manufacture ID's */ +#define SPI_FLASH_SPANSION_IDCODE0 0x01 +#define SPI_FLASH_STMICRO_IDCODE0 0x20 +#define SPI_FLASH_WINBOND_IDCODE0 0xef + +/* Bank addr access commands */ +#define CMD_BANKADDR_BRWR 0x17 +#define CMD_BANKADDR_BRRD 0x16 +#define CMD_EXTNADDR_WREAR 0xC5 +#define CMD_EXTNADDR_RDEAR 0xC8 + /* Common status */ #define STATUS_WIP 0x01
@@ -80,6 +91,9 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); /* Program the bank address register */ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel);
+/* Configure the BAR - discover the bank cmds */ +int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0); + /* * Same as spi_flash_cmd_read() except it also claims/releases the SPI * bus. Used as common part of the ->read() operation. diff --git a/include/spi_flash.h b/include/spi_flash.h index 3b6a44e..50a03bf 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -38,6 +38,8 @@ struct spi_flash { u32 page_size; /* Erase (sector) size */ u32 sector_size; + /* Bank cmds - cmd[0] - read, cmd[1] - write */ + u8 bank_cmd[2];
void *memory_map; /* Address of read-only SPI flash access */ int (*read)(struct spi_flash *flash, u32 offset,