diff --git a/include/mtd/cfi_flash.h b/include/mtd/cfi_flash.h
index 3245b44..966b5e0 100644
--- a/include/mtd/cfi_flash.h
+++ b/include/mtd/cfi_flash.h
@@ -60,6 +60,13 @@
 #define AMD_CMD_UNLOCK_ACK		0x55
 #define AMD_CMD_WRITE_TO_BUFFER		0x25
 #define AMD_CMD_WRITE_BUFFER_CONFIRM	0x29
+#define AMD_CMD_SET_PPB_ENTRY		0xC0
+#define AMD_CMD_SET_PPB_EXIT_BC1	0x90
+#define AMD_CMD_SET_PPB_EXIT_BC2	0x00
+#define AMD_CMD_PPB_UNLOCK_BC1		0x80
+#define AMD_CMD_PPB_UNLOCK_BC2		0x30
+#define AMD_CMD_PPB_LOCK_BC1		0xA0
+#define AMD_CMD_PPB_LOCK_BC2		0x00
 
 #define AMD_STATUS_TOGGLE		0x40
 #define AMD_STATUS_ERROR		0x20