[MTD] [OneNAND] 2X program support

The 2X Program is an extension of Program Operation.

Since the device is equipped with two DataRAMs, and two-plane NAND Flash 
memory array, these two component enables simultaneous program of 4KiB.
Plane1 has only even blocks such as block0, block2, block4 while Plane2 
has only odd blocks such as block1, block3, block5.
So MTD regards it as 4KiB page size and 256KiB block size

Now the following chips support it. (KFXXX16Q2M)
Demux: KFG2G16Q2M, KFH4G16Q2M, KFW8G16Q2M,
Mux:   KFM2G16Q2M, KFN4G16Q2M,

And more recent chips

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h
index af94719890e7..c46161f4eee3 100644
--- a/include/linux/mtd/onenand_regs.h
+++ b/include/linux/mtd/onenand_regs.h
@@ -74,6 +74,8 @@
 
 #define ONENAND_DEVICE_DENSITY_512Mb    (0x002)
 #define ONENAND_DEVICE_DENSITY_1Gb      (0x003)
+#define ONENAND_DEVICE_DENSITY_2Gb      (0x004)
+#define ONENAND_DEVICE_DENSITY_4Gb      (0x005)
 
 /*
  * Version ID Register F002h (R)
@@ -111,6 +113,8 @@
 #define ONENAND_CMD_READOOB             (0x13)
 #define ONENAND_CMD_PROG                (0x80)
 #define ONENAND_CMD_PROGOOB             (0x1A)
+#define ONENAND_CMD_2X_PROG             (0x7D)
+#define ONENAND_CMD_2X_CACHE_PROG       (0x7F)
 #define ONENAND_CMD_UNLOCK              (0x23)
 #define ONENAND_CMD_LOCK                (0x2A)
 #define ONENAND_CMD_LOCK_TIGHT          (0x2C)