[PATCH v2 24/27] mtd: spinand: Add support for read DTR operations

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Advanced SPI-NAND chips are capable of reading data much faster by
leveraging DTR support. This support extends to dual and quad
configurations.

Create macros defining all possible read from cache DTR variants:
- SPINAND_PAGE_READ_FROM_CACHE_DTR_OP
- SPINAND_PAGE_READ_FROM_CACHE_X2_DTR_OP
- SPINAND_PAGE_READ_FROM_CACHE_X4_DTR_OP
- SPINAND_PAGE_READ_FROM_CACHE_DUALIO_DTR_OP
- SPINAND_PAGE_READ_FROM_CACHE_QUADIO_DTR_OP

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
 include/linux/mtd/spinand.h | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 1948e654b8aacb3d4b774a00939e8e8198f53da7..eeabf4a17c578405550fcc1ed1653f9ef09b5ff6 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -87,6 +87,13 @@
 		   SPI_MEM_OP_DUMMY(ndummy, 1),				\
 		   SPI_MEM_OP_DATA_IN(len, buf, 1))
 
+#define SPINAND_PAGE_READ_FROM_CACHE_DTR_OP(addr, ndummy, buf, len, freq) \
+	SPI_MEM_OP(SPI_MEM_OP_CMD(0x0d, 1),				\
+		   SPI_MEM_DTR_OP_ADDR(2, addr, 1),			\
+		   SPI_MEM_DTR_OP_DUMMY(ndummy, 1),			\
+		   SPI_MEM_DTR_OP_DATA_IN(len, buf, 1),			\
+		   SPI_MEM_OP_MAX_FREQ(freq))
+
 #define SPINAND_PAGE_READ_FROM_CACHE_X2_OP(addr, ndummy, buf, len)	\
 	SPI_MEM_OP(SPI_MEM_OP_CMD(0x3b, 1),				\
 		   SPI_MEM_OP_ADDR(2, addr, 1),				\
@@ -99,6 +106,13 @@
 		   SPI_MEM_OP_DUMMY(ndummy, 1),				\
 		   SPI_MEM_OP_DATA_IN(len, buf, 2))
 
+#define SPINAND_PAGE_READ_FROM_CACHE_X2_DTR_OP(addr, ndummy, buf, len, freq) \
+	SPI_MEM_OP(SPI_MEM_OP_CMD(0x3d, 1),				\
+		   SPI_MEM_DTR_OP_ADDR(2, addr, 1),			\
+		   SPI_MEM_DTR_OP_DUMMY(ndummy, 1),			\
+		   SPI_MEM_DTR_OP_DATA_IN(len, buf, 2),			\
+		   SPI_MEM_OP_MAX_FREQ(freq))
+
 #define SPINAND_PAGE_READ_FROM_CACHE_X4_OP(addr, ndummy, buf, len)	\
 	SPI_MEM_OP(SPI_MEM_OP_CMD(0x6b, 1),				\
 		   SPI_MEM_OP_ADDR(2, addr, 1),				\
@@ -111,6 +125,13 @@
 		   SPI_MEM_OP_DUMMY(ndummy, 1),				\
 		   SPI_MEM_OP_DATA_IN(len, buf, 4))
 
+#define SPINAND_PAGE_READ_FROM_CACHE_X4_DTR_OP(addr, ndummy, buf, len, freq) \
+	SPI_MEM_OP(SPI_MEM_OP_CMD(0x6d, 1),				\
+		   SPI_MEM_DTR_OP_ADDR(2, addr, 1),			\
+		   SPI_MEM_DTR_OP_DUMMY(ndummy, 1),			\
+		   SPI_MEM_DTR_OP_DATA_IN(len, buf, 4),			\
+		   SPI_MEM_OP_MAX_FREQ(freq))
+
 #define SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(addr, ndummy, buf, len)	\
 	SPI_MEM_OP(SPI_MEM_OP_CMD(0xbb, 1),				\
 		   SPI_MEM_OP_ADDR(2, addr, 2),				\
@@ -123,6 +144,13 @@
 		   SPI_MEM_OP_DUMMY(ndummy, 2),				\
 		   SPI_MEM_OP_DATA_IN(len, buf, 2))
 
+#define SPINAND_PAGE_READ_FROM_CACHE_DUALIO_DTR_OP(addr, ndummy, buf, len, freq) \
+	SPI_MEM_OP(SPI_MEM_OP_CMD(0xbd, 1),				\
+		   SPI_MEM_DTR_OP_ADDR(2, addr, 2),			\
+		   SPI_MEM_DTR_OP_DUMMY(ndummy, 2),			\
+		   SPI_MEM_DTR_OP_DATA_IN(len, buf, 2),			\
+		   SPI_MEM_OP_MAX_FREQ(freq))
+
 #define SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(addr, ndummy, buf, len)	\
 	SPI_MEM_OP(SPI_MEM_OP_CMD(0xeb, 1),				\
 		   SPI_MEM_OP_ADDR(2, addr, 4),				\
@@ -135,6 +163,13 @@
 		   SPI_MEM_OP_DUMMY(ndummy, 4),				\
 		   SPI_MEM_OP_DATA_IN(len, buf, 4))
 
+#define SPINAND_PAGE_READ_FROM_CACHE_QUADIO_DTR_OP(addr, ndummy, buf, len, freq) \
+	SPI_MEM_OP(SPI_MEM_OP_CMD(0xed, 1),				\
+		   SPI_MEM_DTR_OP_ADDR(2, addr, 4),			\
+		   SPI_MEM_DTR_OP_DUMMY(ndummy, 4),			\
+		   SPI_MEM_DTR_OP_DATA_IN(len, buf, 4),			\
+		   SPI_MEM_OP_MAX_FREQ(freq))
+
 #define SPINAND_PROG_EXEC_OP(addr)					\
 	SPI_MEM_OP(SPI_MEM_OP_CMD(0x10, 1),				\
 		   SPI_MEM_OP_ADDR(3, addr, 1),				\

-- 
2.47.0