diff options
| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-19 15:31:23 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-23 22:02:49 +0530 |
| commit | cf6b11dcda2f13d1c05c2f20e2a1735a833a41fe (patch) | |
| tree | 8ce3b5596e77ff5e66ead1bbd175398b07bd146a /drivers/mtd/spi | |
| parent | c9fcb59d7db74b93df9ee0a830bb9f43888f195c (diff) | |
sf: Discover the bank addr commands
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>
Diffstat (limited to 'drivers/mtd/spi')
| -rw-r--r-- | drivers/mtd/spi/spi_flash.c | 21 | ||||
| -rw-r--r-- | drivers/mtd/spi/spi_flash_internal.h | 14 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9ddd070872..7e19953b0a 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_read_cmd = CMD_BANKADDR_BRRD; + flash->bank_write_cmd = CMD_BANKADDR_BRWR; + break; + case SPI_FLASH_STMICRO_IDCODE0: + case SPI_FLASH_WINBOND_IDCODE0: + flash->bank_read_cmd = CMD_EXTNADDR_RDEAR; + flash->bank_write_cmd = 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 772fef622d..db6c4448c4 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. |