From 789157e41a0694e70bf80bceecd79438c3de98d6 Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Mon, 19 Mar 2018 14:47:28 +0100 Subject: [PATCH] mtd: rawnand: allow vendors to declare (un)supported features If SET/GET_FEATURES is available (from the parameter page), use a bitmap to declare what feature is actually supported. Initialize the bitmap in the core to support timing changes (only feature used by the core), also add support for Micron specific features used in Micron initialization code (in the init routine). Signed-off-by: Miquel Raynal Signed-off-by: Boris Brezillon --- drivers/mtd/nand/raw/nand_base.c | 26 +++++++++++++++++++------- drivers/mtd/nand/raw/nand_micron.c | 4 ++++ include/linux/mtd/rawnand.h | 8 +++++++- 3 files changed, 30 insertions(+), 8 deletions(-) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 789c11e..0bd9f22 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -1160,9 +1160,16 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) return status; } -static bool nand_supports_set_get_features(struct nand_chip *chip) +static bool nand_supports_get_features(struct nand_chip *chip, int addr) { - return chip->parameters.supports_set_get_features; + return (chip->parameters.supports_set_get_features && + test_bit(addr, chip->parameters.get_feature_list)); +} + +static bool nand_supports_set_features(struct nand_chip *chip, int addr) +{ + return (chip->parameters.supports_set_get_features && + test_bit(addr, chip->parameters.set_feature_list)); } /** @@ -1179,7 +1186,7 @@ int nand_get_features(struct nand_chip *chip, int addr, { struct mtd_info *mtd = nand_to_mtd(chip); - if (!nand_supports_set_get_features(chip)) + if (!nand_supports_get_features(chip, addr)) return -ENOTSUPP; return chip->get_features(mtd, chip, addr, subfeature_param); @@ -1200,7 +1207,7 @@ int nand_set_features(struct nand_chip *chip, int addr, { struct mtd_info *mtd = nand_to_mtd(chip); - if (!nand_supports_set_get_features(chip)) + if (!nand_supports_set_features(chip, addr)) return -ENOTSUPP; return chip->set_features(mtd, chip, addr, subfeature_param); @@ -1271,7 +1278,7 @@ static int nand_setup_data_interface(struct nand_chip *chip, int chipnr) return 0; /* Change the mode on the chip side (if supported by the NAND chip) */ - if (nand_supports_set_get_features(chip)) { + if (nand_supports_set_features(chip, ONFI_FEATURE_ADDR_TIMING_MODE)) { chip->select_chip(mtd, chipnr); ret = nand_set_features(chip, ONFI_FEATURE_ADDR_TIMING_MODE, tmode_param); @@ -1286,7 +1293,7 @@ static int nand_setup_data_interface(struct nand_chip *chip, int chipnr) return ret; /* Check the mode has been accepted by the chip, if supported */ - if (!nand_supports_set_get_features(chip)) + if (!nand_supports_get_features(chip, ONFI_FEATURE_ADDR_TIMING_MODE)) return 0; memset(tmode_param, 0, ONFI_SUBFEATURE_PARAM_LEN); @@ -5192,8 +5199,13 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) } /* Save some parameters from the parameter page for future use */ - if (le16_to_cpu(p->opt_cmd) & ONFI_OPT_CMD_SET_GET_FEATURES) + if (le16_to_cpu(p->opt_cmd) & ONFI_OPT_CMD_SET_GET_FEATURES) { chip->parameters.supports_set_get_features = true; + bitmap_set(chip->parameters.get_feature_list, + ONFI_FEATURE_ADDR_TIMING_MODE, 1); + bitmap_set(chip->parameters.set_feature_list, + ONFI_FEATURE_ADDR_TIMING_MODE, 1); + } chip->parameters.onfi.tPROG = le16_to_cpu(p->t_prog); chip->parameters.onfi.tBERS = le16_to_cpu(p->t_bers); chip->parameters.onfi.tR = le16_to_cpu(p->t_r); diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c index c5974d8..0af45b1 100644 --- a/drivers/mtd/nand/raw/nand_micron.c +++ b/drivers/mtd/nand/raw/nand_micron.c @@ -64,6 +64,10 @@ static int micron_nand_onfi_init(struct nand_chip *chip) chip->setup_read_retry = micron_nand_setup_read_retry; } + if (p->supports_set_get_features) { + set_bit(ONFI_FEATURE_ADDR_READ_RETRY, p->set_feature_list); + set_bit(ONFI_FEATURE_ADDR_READ_RETRY, p->get_feature_list); + } return 0; } diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 7b5afa6..d9f4177 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -21,6 +21,7 @@ #include #include #include +#include struct mtd_info; struct nand_flash_dev; @@ -235,7 +236,8 @@ struct nand_chip; #define ONFI_TIMING_MODE_5 (1 << 5) #define ONFI_TIMING_MODE_UNKNOWN (1 << 6) -/* ONFI feature address */ +/* ONFI feature number/address */ +#define ONFI_FEATURE_NUMBER 256 #define ONFI_FEATURE_ADDR_TIMING_MODE 0x1 /* Vendor-specific feature address (Micron) */ @@ -455,12 +457,16 @@ struct onfi_params { * struct nand_parameters - NAND generic parameters from the parameter page * @model: Model name * @supports_set_get_features: The NAND chip supports setting/getting features + * @set_feature_list: Bitmap of features that can be set + * @get_feature_list: Bitmap of features that can be get * @onfi: ONFI specific parameters */ struct nand_parameters { /* Generic parameters */ char model[100]; bool supports_set_get_features; + DECLARE_BITMAP(set_feature_list, ONFI_FEATURE_NUMBER); + DECLARE_BITMAP(get_feature_list, ONFI_FEATURE_NUMBER); /* ONFI parameters */ struct onfi_params onfi; -- 2.7.4