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authorJagannadha Sutradharudu Teki <jaganna@xilinx.com>2014-01-11 15:10:28 +0530
committerJagannadha Sutradharudu Teki <jaganna@xilinx.com>2014-01-11 15:10:28 +0530
commit4e09cc1e2c5d22735d0fa3d2d1eaecd27e19948e (patch)
tree756318d3d7b8fd0ba0512369cacb69f0922ed7ee /include/spi_flash.h
parent12f00caf61677aca8f390651546f203575e20643 (diff)
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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.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/spi_flash.h b/include/spi_flash.h
index afc3a58..692e143 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);