diff options
Diffstat (limited to 'drivers/mtd/nand/raw/nand_timings.c')
| -rw-r--r-- | drivers/mtd/nand/raw/nand_timings.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/drivers/mtd/nand/raw/nand_timings.c b/drivers/mtd/nand/raw/nand_timings.c index 7c4e4a371bbc5..ebc7b5f76f77b 100644 --- a/drivers/mtd/nand/raw/nand_timings.c +++ b/drivers/mtd/nand/raw/nand_timings.c @@ -13,6 +13,8 @@ #include <linux/export.h> #include <linux/mtd/rawnand.h> +#define ONFI_DYN_TIMING_MAX U16_MAX + static const struct nand_data_interface onfi_sdr_timings[] = { /* Mode 0 */ { @@ -292,6 +294,7 @@ int onfi_fill_data_interface(struct nand_chip *chip, int timing_mode) { struct nand_data_interface *iface = &chip->data_interface; + struct onfi_params *onfi = chip->parameters.onfi; if (type != NAND_SDR_IFACE) return -EINVAL; @@ -303,20 +306,35 @@ int onfi_fill_data_interface(struct nand_chip *chip, /* * Initialize timings that cannot be deduced from timing mode: - * tR, tPROG, tCCS, ... + * tPROG, tBERS, tR and tCCS. * These information are part of the ONFI parameter page. */ - if (chip->parameters.onfi.version) { - struct nand_parameters *params = &chip->parameters; + if (onfi) { + struct nand_sdr_timings *timings = &iface->timings.sdr; + + /* microseconds -> picoseconds */ + timings->tPROG_max = 1000000ULL * onfi->tPROG; + timings->tBERS_max = 1000000ULL * onfi->tBERS; + timings->tR_max = 1000000ULL * onfi->tR; + + /* nanoseconds -> picoseconds */ + timings->tCCS_min = 1000UL * onfi->tCCS; + } else { struct nand_sdr_timings *timings = &iface->timings.sdr; + /* + * For non-ONFI chips we use the highest possible value for + * tPROG and tBERS. tR and tCCS will take the default values + * precised in the ONFI specification for timing mode 0, + * respectively 200us and 500ns. + */ /* microseconds -> picoseconds */ - timings->tPROG_max = 1000000ULL * params->onfi.tPROG; - timings->tBERS_max = 1000000ULL * params->onfi.tBERS; - timings->tR_max = 1000000ULL * params->onfi.tR; + timings->tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX; + timings->tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX; + timings->tR_max = 1000000ULL * 200000000ULL; /* nanoseconds -> picoseconds */ - timings->tCCS_min = 1000UL * params->onfi.tCCS; + timings->tCCS_min = 1000UL * 500000; } return 0; |