diff options
| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-13 20:37:19 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-23 22:02:49 +0530 |
| commit | c9fcb59d7db74b93df9ee0a830bb9f43888f195c (patch) | |
| tree | 4747a45dda77b26399fba6aec52c92e2d526c61b | |
| parent | 9675fed4742338c71678cd310d0d6922b56e490a (diff) | |
| download | talos-obmc-uboot-c9fcb59d7db74b93df9ee0a830bb9f43888f195c.tar.gz talos-obmc-uboot-c9fcb59d7db74b93df9ee0a830bb9f43888f195c.zip | |
sf: Add bank address register writing support
This patch provides support to program a flash bank address
register.
extended/bank address register contains an information to access
the 4th byte addressing in 3-byte address mode.
reff' the spec for more details about bank addr register
in Page-63, Table 8.16
http://www.spansion.com/Support/Datasheets/S25FL128S_256S_00.pdf
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/mtd/spi/spi_flash.c | 26 | ||||
| -rw-r--r-- | drivers/mtd/spi/spi_flash_internal.h | 3 |
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 0e38f59481..9ddd070872 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -278,6 +278,32 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; } +int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) +{ + u8 cmd; + int ret; + + ret = spi_flash_cmd_write_enable(flash); + if (ret < 0) { + debug("SF: enabling write failed\n"); + return ret; + } + + ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &bank_sel, 1); + if (ret) { + debug("SF: fail to write bank addr register\n"); + return ret; + } + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret < 0) { + debug("SF: write bank addr register timed out\n"); + return ret; + } + + 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 141cfa8b26..772fef622d 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -77,6 +77,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) /* Program the status register. */ 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); + /* * Same as spi_flash_cmd_read() except it also claims/releases the SPI * bus. Used as common part of the ->read() operation. |
