From: Dinesh Maniyam dinesh.maniyam@intel.com
Support NAND_CMD_SET_FEATURES & NAND_CMD_GET_FEATURES. These commands is one of the basic commands of NAND. The parameters get from these commands will be used to set timing mode of NAND data interface.
Signed-off-by: Dinesh Maniyam dinesh.maniyam@intel.com
--- v2: - remove the "this patch is to" commit phrases --- --- drivers/mtd/nand/raw/cadence_nand.c | 30 +++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/drivers/mtd/nand/raw/cadence_nand.c b/drivers/mtd/nand/raw/cadence_nand.c index 74926560ad..895ee77320 100644 --- a/drivers/mtd/nand/raw/cadence_nand.c +++ b/drivers/mtd/nand/raw/cadence_nand.c @@ -2010,6 +2010,29 @@ static int cadence_nand_reset(struct mtd_info *mtd, unsigned int command) return 0; }
+static int cadence_nand_features(struct mtd_info *mtd, u8 offset_in_page, u32 command) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + int ret = 0; + + ret = cadence_nand_cmd_opcode(chip, command); + if (ret) + return ret; + + ret = cadence_nand_cmd_address(chip, ONE_CYCLE, &offset_in_page); + if (ret) + return ret; + + if (command == NAND_CMD_GET_FEATURES) + ret = cadence_nand_cmd_data(chip, ONFI_SUBFEATURE_PARAM_LEN, + GCMD_DIR_READ); + else + ret = cadence_nand_cmd_data(chip, ONFI_SUBFEATURE_PARAM_LEN, + GCMD_DIR_WRITE); + + return ret; +} + static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command, int offset_in_page, int page) { @@ -2034,6 +2057,11 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command, case NAND_CMD_RESET: ret = cadence_nand_reset(mtd, command); break; + + case NAND_CMD_SET_FEATURES: + case NAND_CMD_GET_FEATURES: + ret = cadence_nand_features(mtd, offset_in_page, command); + break; /* * ecc will override other command for read, write and erase */ @@ -2076,6 +2104,8 @@ static u8 cadence_nand_read_byte(struct mtd_info *mtd) size = 8; else if (cadence->cmd == NAND_CMD_PARAM) size = sizeof(struct nand_jedec_params); + else if (cadence->cmd == NAND_CMD_GET_FEATURES) + size = ONFI_SUBFEATURE_PARAM_LEN;
cadence_nand_read_buf(mtd, &cadence->buf[0], size); }