mtd: spinand: Add support for read DTR operations

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@bootlin.com>

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 2f5cce23b3ec77d5f8c57fea1691c5043cf40c48..0da8a1c7740ef5cbbdb2a74858465136638224f4 100644 (file)
--- 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),                         \