Messages in this thread Patch in this message | | | From | Jagan Teki <> | Subject | [PATCH 1/6] mtd: spi-nor: Add quad page program support | Date | Wed, 10 Aug 2016 02:10:20 +0530 |
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Add quad page program support with the use of nor->flags and then controller will use 4 lines for data transmission which is quite faster than page program(02h)
Cc: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Jagan Teki <jteki@openedev.com> --- drivers/mtd/spi-nor/spi-nor.c | 13 +++++++++++++ include/linux/mtd/spi-nor.h | 2 ++ 2 files changed, 15 insertions(+)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index d0fc165..f88bd7e 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -75,6 +75,7 @@ struct flash_info { * bit. Must be used with * SPI_NOR_HAS_LOCK. */ +#define SPI_NOR_QUAD_WRITE BIT(10) /* Flash supports Quad Write */ }; #define JEDEC_MFR(info) ((info)->id[0]) @@ -1306,6 +1307,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) struct device *dev = nor->dev; struct mtd_info *mtd = &nor->mtd; struct device_node *np = spi_nor_get_flash_node(nor); + bool need_quad = false; int ret; int i; @@ -1441,6 +1443,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) return ret; } nor->flash_read = SPI_NOR_QUAD; + need_quad = true; } else if (mode == SPI_NOR_DUAL && info->flags & SPI_NOR_DUAL_READ) { nor->flash_read = SPI_NOR_DUAL; } @@ -1465,6 +1468,16 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) } nor->program_opcode = SPINOR_OP_PP; + if (nor->flags == SNOR_F_USE_QPP && info->flags & SPI_NOR_QUAD_WRITE) { + if (!need_quad) + ret = set_quad_mode(nor, info); + if (ret) { + dev_err(dev, "quad mode not supported\n"); + return ret; + } + } + nor->program_opcode = SPINOR_OP_QPP; + } if (info->addr_width) nor->addr_width = info->addr_width; diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index c425c7b..aa0e6cd 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -46,6 +46,7 @@ #define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual SPI) */ #define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad SPI) */ #define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */ +#define SPINOR_OP_QPP 0x32 /* Quad Page program */ #define SPINOR_OP_BE_4K 0x20 /* Erase 4KiB block */ #define SPINOR_OP_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */ #define SPINOR_OP_BE_32K 0x52 /* Erase 32KiB block */ @@ -119,6 +120,7 @@ enum spi_nor_ops { enum spi_nor_option_flags { SNOR_F_USE_FSR = BIT(0), SNOR_F_HAS_SR_TB = BIT(1), + SNOR_F_USE_QPP = BIT(2), }; /** -- 2.7.4
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