diff options
| author | Alison Wang <b18965@freescale.com> | 2017-05-19 02:33:06 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:33 (GMT) |
| commit | ec3c0dcf7e4c5c23341313bdaf4588204efc6b7c (patch) | |
| tree | 6f45c327141aea25ab76935e64b4d0a6ae839467 /include/linux | |
| parent | 1952ca9b29b1ef96bed5c1e587265ac828f961d7 (diff) | |
| download | linux-ec3c0dcf7e4c5c23341313bdaf4588204efc6b7c.tar.xz | |
mtd: spi-nor: add DDR quad read support
This patch adds the DDR quad read support by the following:
[1] add SPI_NOR_DDR_QUAD read mode.
[2] add DDR Quad read opcodes:
SPINOR_OP_READ_1_4_4_D / SPINOR_OP_READ4_1_4_4_D
[3] add set_ddr_quad_mode() to initialize for the DDR quad read.
Currently it only works for Spansion NOR.
[4] set dummy with 6 for Spansion family
Test this patch for Spansion s25fl128s NOR flash.
Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mtd/spi-nor.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 8ae2539..5003ff6 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -31,10 +31,10 @@ /* * Note on opcode nomenclature: some opcodes have a format like - * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number + * SPINOR_OP_FUNCTION{4,}_x_y_z{_D}. The numbers x, y,and z stand for the number * of I/O lines used for the opcode, address, and data (respectively). The * FUNCTION has an optional suffix of '4', to represent an opcode which - * requires a 4-byte (32-bit) address. + * requires a 4-byte (32-bit) address. The suffix of 'D' stands for the */ /* Flash opcodes. */ @@ -46,7 +46,9 @@ #define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual Output SPI) */ #define SPINOR_OP_READ_1_2_2 0xbb /* Read data bytes (Dual I/O SPI) */ #define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad Output SPI) */ +#define SPINOR_OP_READ_1_4_4_D 0xed /* Read data bytes (DDR Quad SPI) */ #define SPINOR_OP_READ_1_4_4 0xeb /* Read data bytes (Quad I/O SPI) */ +#define SPINOR_OP_READ4_1_4_4_D 0xee /* Read data bytes (DDR Quad SPI) */ #define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */ #define SPINOR_OP_PP_1_1_4 0x32 /* Quad page program */ #define SPINOR_OP_PP_1_4_4 0x38 /* Quad page program */ @@ -62,9 +64,11 @@ /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */ #define SPINOR_OP_READ_4B 0x13 /* Read data bytes (low frequency) */ #define SPINOR_OP_READ_FAST_4B 0x0c /* Read data bytes (high frequency) */ +#define SPINOR_OP_READ4_FAST 0x0c /* Read data bytes (high frequency) */ #define SPINOR_OP_READ_1_1_2_4B 0x3c /* Read data bytes (Dual Output SPI) */ #define SPINOR_OP_READ_1_2_2_4B 0xbc /* Read data bytes (Dual I/O SPI) */ #define SPINOR_OP_READ_1_1_4_4B 0x6c /* Read data bytes (Quad Output SPI) */ +#define SPINOR_OP_READ4_1_1_4 0x6c /* Read data bytes (Quad SPI) */ #define SPINOR_OP_READ_1_4_4_4B 0xec /* Read data bytes (Quad I/O SPI) */ #define SPINOR_OP_PP_4B 0x12 /* Page program (up to 256 bytes) */ #define SPINOR_OP_PP_1_1_4_4B 0x34 /* Quad page program */ @@ -128,6 +132,7 @@ enum read_mode { SPI_NOR_FAST, SPI_NOR_DUAL, SPI_NOR_QUAD, + SPI_NOR_DDR_QUAD, }; #define SPI_NOR_MAX_CMD_SIZE 8 |