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| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-11 15:10:28 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-11 15:10:28 +0530 |
| commit | 4e09cc1e2c5d22735d0fa3d2d1eaecd27e19948e (patch) | |
| tree | 756318d3d7b8fd0ba0512369cacb69f0922ed7ee /include/spi_flash.h | |
| parent | 12f00caf61677aca8f390651546f203575e20643 (diff) | |
| download | blackbird-obmc-uboot-4e09cc1e2c5d22735d0fa3d2d1eaecd27e19948e.tar.gz blackbird-obmc-uboot-4e09cc1e2c5d22735d0fa3d2d1eaecd27e19948e.zip | |
sf: Add extended read commands support
Current sf uses FAST_READ command, this patch adds support to
use the different/extended read command.
This implementation will determine the fastest command by taking
the supported commands from the flash and the controller, controller
is always been a priority.
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'include/spi_flash.h')
| -rw-r--r-- | include/spi_flash.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/spi_flash.h b/include/spi_flash.h index afc3a5809e..692e143b60 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -19,6 +19,14 @@ #include <linux/types.h> #include <linux/compiler.h> +/* Enum list - Extended read commands */ +enum spi_read_cmds { + ARRAY_SLOW = 1 << 0, + DUAL_OUTPUT_FAST = 1 << 1, + DUAL_IO_FAST = 1 << 2, +}; +#define RD_EXTN ARRAY_SLOW | DUAL_OUTPUT_FAST | DUAL_IO_FAST + /** * struct spi_flash - SPI flash structure * @@ -33,6 +41,7 @@ * @bank_curr: Current flash bank * @poll_cmd: Poll cmd - for flash erase/program * @erase_cmd: Erase cmd 4K, 32K, 64K + * @read_cmd: Read cmd - Array Fast and Extn read * @memory_map: Address of read-only SPI flash access * @read: Flash read ops: Read len bytes at offset into buf * Supported cmds: Fast Array Read @@ -57,6 +66,7 @@ struct spi_flash { #endif u8 poll_cmd; u8 erase_cmd; + u8 read_cmd; void *memory_map; int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf); |
