| Message ID | 1394647664-8258-3-git-send-email-b.brezillon.dev@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Wed, Mar 12, 2014 at 07:07:37PM +0100, Boris BREZILLON wrote: > Add a converter to retrieve NAND timings from an ONFI NAND timing mode. > This only support SDR NAND timings for now. > > Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com> > --- > drivers/mtd/nand/Makefile | 2 +- > drivers/mtd/nand/nand_timings.c | 248 +++++++++++++++++++++++++++++++++++++++ > include/linux/mtd/nand.h | 4 + > 3 files changed, 253 insertions(+), 1 deletion(-) > create mode 100644 drivers/mtd/nand/nand_timings.c > > diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile > index c970ce7..0b8a822 100644 > --- a/drivers/mtd/nand/Makefile > +++ b/drivers/mtd/nand/Makefile > @@ -2,7 +2,7 @@ > # linux/drivers/nand/Makefile > # > > -obj-$(CONFIG_MTD_NAND) += nand.o > +obj-$(CONFIG_MTD_NAND) += nand.o nand_timings.o > obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o > obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o > obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o nand_hynix.o This patch doesn't apply to l2-mtd.git. Are you basing this on your Hynix patches? I thought some (all?) of them were determined unnecessary. Anyway, please rebase on l2-mtd.git, since there are a couple of other bits that don't apply properly. > diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c > new file mode 100644 > index 0000000..f66fe95 > --- /dev/null > +++ b/drivers/mtd/nand/nand_timings.c > @@ -0,0 +1,248 @@ > +/* > + * Copyright (C) 2014 Boris BREZILLON <b.brezillon.dev@gmail.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + */ > +#include <linux/mtd/nand.h> > + > +static const struct nand_sdr_timings onfi_sdr_timings[] = { > + /* Mode 0 */ > + { > + .tADL_min = 200000, > + .tALH_min = 20000, > + .tALS_min = 50000, > + .tAR_min = 25000, > + .tCEA_max = 100000, > + .tCEH_min = 20000, > + .tCH_min = 20000, > + .tCHZ_max = 100000, > + .tCLH_min = 20000, > + .tCLR_min = 20000, > + .tCLS_min = 50000, > + .tCOH_min = 0, > + .tCS_min = 70000, > + .tDH_min = 20000, > + .tDS_min = 40000, > + .tFEAT_max = 1000000, > + .tIR_min = 10000, > + .tITC_max = 1000000, > + .tRC_min = 100000, > + .tREA_max = 40000, > + .tREH_min = 30000, > + .tRHOH_min = 0, > + .tRHW_min = 200000, > + .tRHZ_max = 200000, > + .tRLOH_min = 0, > + .tRP_min = 50000, > + .tRST_max = 250000000000, I was initially wary of potential overflow here, but apparently the C standard (section 6.4.4.1) ensures that literal constants like this will be promoted to a sufficiently-large type. > + .tWB_max = 200000, > + .tRR_min = 40000, > + .tWC_min = 100000, > + .tWH_min = 30000, > + .tWHR_min = 120000, > + .tWP_min = 50000, > + .tWW_min = 100000, > + }, > + /* Mode 1 */ > + { > + .tADL_min = 100000, > + .tALH_min = 10000, > + .tALS_min = 25000, > + .tAR_min = 10000, > + .tCEA_max = 45000, > + .tCEH_min = 20000, > + .tCH_min = 10000, > + .tCHZ_max = 50000, > + .tCLH_min = 10000, > + .tCLR_min = 10000, > + .tCLS_min = 25000, > + .tCOH_min = 15000, > + .tCS_min = 35000, > + .tDH_min = 10000, > + .tDS_min = 20000, > + .tFEAT_max = 1000000, > + .tIR_min = 0, > + .tITC_max = 1000000, > + .tRC_min = 50000, > + .tREA_max = 30000, > + .tREH_min = 15000, > + .tRHOH_min = 15000, > + .tRHW_min = 100000, > + .tRHZ_max = 100000, > + .tRLOH_min = 0, > + .tRP_min = 25000, > + .tRR_min = 20000, > + .tRST_max = 500000000, > + .tWB_max = 100000, > + .tWC_min = 45000, > + .tWH_min = 15000, > + .tWHR_min = 80000, > + .tWP_min = 25000, > + .tWW_min = 100000, > + }, > + /* Mode 2 */ > + { > + .tADL_min = 100000, > + .tALH_min = 10000, > + .tALS_min = 15000, > + .tAR_min = 10000, > + .tCEA_max = 30000, > + .tCEH_min = 20000, > + .tCH_min = 10000, > + .tCHZ_max = 50000, > + .tCLH_min = 10000, > + .tCLR_min = 10000, > + .tCLS_min = 15000, > + .tCOH_min = 15000, > + .tCS_min = 25000, > + .tDH_min = 5000, > + .tDS_min = 15000, > + .tFEAT_max = 1000000, > + .tIR_min = 0, > + .tITC_max = 1000000, > + .tRC_min = 35000, > + .tREA_max = 25000, > + .tREH_min = 15000, > + .tRHOH_min = 15000, > + .tRHW_min = 100000, > + .tRHZ_max = 100000, > + .tRLOH_min = 0, > + .tRR_min = 20000, > + .tRST_max = 500000000, > + .tWB_max = 100000, > + .tRP_min = 17000, > + .tWC_min = 35000, > + .tWH_min = 15000, > + .tWHR_min = 80000, > + .tWP_min = 17000, > + .tWW_min = 100000, > + }, > + /* Mode 3 */ > + { > + .tADL_min = 100000, > + .tALH_min = 5000, > + .tALS_min = 10000, > + .tAR_min = 10000, > + .tCEA_max = 25000, > + .tCEH_min = 20000, > + .tCH_min = 5000, > + .tCHZ_max = 50000, > + .tCLH_min = 5000, > + .tCLR_min = 10000, > + .tCLS_min = 10000, > + .tCOH_min = 15000, > + .tCS_min = 25000, > + .tDH_min = 5000, > + .tDS_min = 10000, > + .tFEAT_max = 1000000, > + .tIR_min = 0, > + .tITC_max = 1000000, > + .tRC_min = 30000, > + .tREA_max = 20000, > + .tREH_min = 10000, > + .tRHOH_min = 15000, > + .tRHW_min = 100000, > + .tRHZ_max = 100000, > + .tRLOH_min = 0, > + .tRP_min = 15000, > + .tRR_min = 20000, > + .tRST_max = 500000000, > + .tWB_max = 100000, > + .tWC_min = 30000, > + .tWH_min = 10000, > + .tWHR_min = 80000, > + .tWP_min = 15000, > + .tWW_min = 100000, > + }, > + /* Mode 4 */ > + { > + .tADL_min = 70000, > + .tALH_min = 5000, > + .tALS_min = 10000, > + .tAR_min = 10000, > + .tCEA_max = 25000, > + .tCEH_min = 20000, > + .tCH_min = 5000, > + .tCHZ_max = 30000, > + .tCLH_min = 5000, > + .tCLR_min = 10000, > + .tCLS_min = 10000, > + .tCOH_min = 15000, > + .tCS_min = 20000, > + .tDH_min = 5000, > + .tDS_min = 10000, > + .tFEAT_max = 1000000, > + .tIR_min = 0, > + .tITC_max = 1000000, > + .tRC_min = 25000, > + .tREA_max = 20000, > + .tREH_min = 10000, > + .tRHOH_min = 15000, > + .tRHW_min = 100000, > + .tRHZ_max = 100000, > + .tRLOH_min = 5000, > + .tRP_min = 12000, > + .tRR_min = 20000, > + .tRST_max = 500000000, > + .tWB_max = 100000, > + .tWC_min = 25000, > + .tWH_min = 10000, > + .tWHR_min = 80000, > + .tWP_min = 12000, > + .tWW_min = 100000, > + }, > + /* Mode 5 */ > + { > + .tADL_min = 70000, > + .tALH_min = 5000, > + .tALS_min = 10000, > + .tAR_min = 10000, > + .tCEA_max = 25000, > + .tCEH_min = 20000, > + .tCH_min = 5000, > + .tCHZ_max = 30000, > + .tCLH_min = 5000, > + .tCLR_min = 10000, > + .tCLS_min = 10000, > + .tCOH_min = 15000, > + .tCS_min = 15000, > + .tDH_min = 5000, > + .tDS_min = 7000, > + .tFEAT_max = 1000000, > + .tIR_min = 0, > + .tITC_max = 1000000, > + .tRC_min = 20000, > + .tREA_max = 16000, > + .tREH_min = 7000, > + .tRHOH_min = 15000, > + .tRHW_min = 100000, > + .tRHZ_max = 100000, > + .tRLOH_min = 5000, > + .tRP_min = 10000, > + .tRR_min = 20000, > + .tRST_max = 500000000, > + .tWB_max = 100000, > + .tWC_min = 20000, > + .tWH_min = 7000, > + .tWHR_min = 80000, > + .tWP_min = 10000, > + .tWW_min = 100000, > + }, > +}; > + > +/** > + * onfi_async_timing_mode_to_sdr_timings - [NAND Interface] Retrieve NAND > + * timings according to the given ONFI timing mode > + * @mode: ONFI timing mode > + */ > +const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode) > +{ > + if (mode < 0 || mode > ARRAY_SIZE(onfi_sdr_timings)) Should be ">=". if (mode < 0 || mode >= ARRAY_SIZE(onfi_sdr_timings)) > + return ERR_PTR(-EINVAL); > + > + return &onfi_sdr_timings[mode]; > +} > +EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings); > diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h > index f3ff3a3..b8e3c2b 100644 > --- a/include/linux/mtd/nand.h > +++ b/include/linux/mtd/nand.h > @@ -847,6 +847,7 @@ static inline bool nand_is_slc(struct nand_chip *chip) > return chip->bits_per_cell == 1; > } > > + Unnecessary whitespace change. > /** > * struct nand_sdr_timings - SDR NAND chip timings > * > @@ -895,4 +896,7 @@ struct nand_sdr_timings { > u32 tWW_min; > }; > > +/* convert an ONFI timing mode to its timing characteristics. */ > +const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode); > + > #endif /* __LINUX_MTD_NAND_H */ Brian
Hi Boris, Since I think you were planning on revisiting this soon, I have one more comment: On Wed, Mar 12, 2014 at 07:07:37PM +0100, Boris BREZILLON wrote: > diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile > index c970ce7..0b8a822 100644 > --- a/drivers/mtd/nand/Makefile > +++ b/drivers/mtd/nand/Makefile > @@ -2,7 +2,7 @@ > # linux/drivers/nand/Makefile > # > > -obj-$(CONFIG_MTD_NAND) += nand.o > +obj-$(CONFIG_MTD_NAND) += nand.o nand_timings.o This is not the right place, as it will generate a new module 'nand_timings' (nand_timings.ko, if CONFIG_MTD_NAND=m). You probably want to just add nand_timings.o to the 'nand-objs' list at the bottom of the Makefile, like this: nand-objs := nand_base.o nand_bbt.o nand_timings.o > obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o > obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o > obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o nand_hynix.o Thanks, Brian
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index c970ce7..0b8a822 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -2,7 +2,7 @@ # linux/drivers/nand/Makefile # -obj-$(CONFIG_MTD_NAND) += nand.o +obj-$(CONFIG_MTD_NAND) += nand.o nand_timings.o obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o nand_hynix.o diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c new file mode 100644 index 0000000..f66fe95 --- /dev/null +++ b/drivers/mtd/nand/nand_timings.c @@ -0,0 +1,248 @@ +/* + * Copyright (C) 2014 Boris BREZILLON <b.brezillon.dev@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/mtd/nand.h> + +static const struct nand_sdr_timings onfi_sdr_timings[] = { + /* Mode 0 */ + { + .tADL_min = 200000, + .tALH_min = 20000, + .tALS_min = 50000, + .tAR_min = 25000, + .tCEA_max = 100000, + .tCEH_min = 20000, + .tCH_min = 20000, + .tCHZ_max = 100000, + .tCLH_min = 20000, + .tCLR_min = 20000, + .tCLS_min = 50000, + .tCOH_min = 0, + .tCS_min = 70000, + .tDH_min = 20000, + .tDS_min = 40000, + .tFEAT_max = 1000000, + .tIR_min = 10000, + .tITC_max = 1000000, + .tRC_min = 100000, + .tREA_max = 40000, + .tREH_min = 30000, + .tRHOH_min = 0, + .tRHW_min = 200000, + .tRHZ_max = 200000, + .tRLOH_min = 0, + .tRP_min = 50000, + .tRST_max = 250000000000, + .tWB_max = 200000, + .tRR_min = 40000, + .tWC_min = 100000, + .tWH_min = 30000, + .tWHR_min = 120000, + .tWP_min = 50000, + .tWW_min = 100000, + }, + /* Mode 1 */ + { + .tADL_min = 100000, + .tALH_min = 10000, + .tALS_min = 25000, + .tAR_min = 10000, + .tCEA_max = 45000, + .tCEH_min = 20000, + .tCH_min = 10000, + .tCHZ_max = 50000, + .tCLH_min = 10000, + .tCLR_min = 10000, + .tCLS_min = 25000, + .tCOH_min = 15000, + .tCS_min = 35000, + .tDH_min = 10000, + .tDS_min = 20000, + .tFEAT_max = 1000000, + .tIR_min = 0, + .tITC_max = 1000000, + .tRC_min = 50000, + .tREA_max = 30000, + .tREH_min = 15000, + .tRHOH_min = 15000, + .tRHW_min = 100000, + .tRHZ_max = 100000, + .tRLOH_min = 0, + .tRP_min = 25000, + .tRR_min = 20000, + .tRST_max = 500000000, + .tWB_max = 100000, + .tWC_min = 45000, + .tWH_min = 15000, + .tWHR_min = 80000, + .tWP_min = 25000, + .tWW_min = 100000, + }, + /* Mode 2 */ + { + .tADL_min = 100000, + .tALH_min = 10000, + .tALS_min = 15000, + .tAR_min = 10000, + .tCEA_max = 30000, + .tCEH_min = 20000, + .tCH_min = 10000, + .tCHZ_max = 50000, + .tCLH_min = 10000, + .tCLR_min = 10000, + .tCLS_min = 15000, + .tCOH_min = 15000, + .tCS_min = 25000, + .tDH_min = 5000, + .tDS_min = 15000, + .tFEAT_max = 1000000, + .tIR_min = 0, + .tITC_max = 1000000, + .tRC_min = 35000, + .tREA_max = 25000, + .tREH_min = 15000, + .tRHOH_min = 15000, + .tRHW_min = 100000, + .tRHZ_max = 100000, + .tRLOH_min = 0, + .tRR_min = 20000, + .tRST_max = 500000000, + .tWB_max = 100000, + .tRP_min = 17000, + .tWC_min = 35000, + .tWH_min = 15000, + .tWHR_min = 80000, + .tWP_min = 17000, + .tWW_min = 100000, + }, + /* Mode 3 */ + { + .tADL_min = 100000, + .tALH_min = 5000, + .tALS_min = 10000, + .tAR_min = 10000, + .tCEA_max = 25000, + .tCEH_min = 20000, + .tCH_min = 5000, + .tCHZ_max = 50000, + .tCLH_min = 5000, + .tCLR_min = 10000, + .tCLS_min = 10000, + .tCOH_min = 15000, + .tCS_min = 25000, + .tDH_min = 5000, + .tDS_min = 10000, + .tFEAT_max = 1000000, + .tIR_min = 0, + .tITC_max = 1000000, + .tRC_min = 30000, + .tREA_max = 20000, + .tREH_min = 10000, + .tRHOH_min = 15000, + .tRHW_min = 100000, + .tRHZ_max = 100000, + .tRLOH_min = 0, + .tRP_min = 15000, + .tRR_min = 20000, + .tRST_max = 500000000, + .tWB_max = 100000, + .tWC_min = 30000, + .tWH_min = 10000, + .tWHR_min = 80000, + .tWP_min = 15000, + .tWW_min = 100000, + }, + /* Mode 4 */ + { + .tADL_min = 70000, + .tALH_min = 5000, + .tALS_min = 10000, + .tAR_min = 10000, + .tCEA_max = 25000, + .tCEH_min = 20000, + .tCH_min = 5000, + .tCHZ_max = 30000, + .tCLH_min = 5000, + .tCLR_min = 10000, + .tCLS_min = 10000, + .tCOH_min = 15000, + .tCS_min = 20000, + .tDH_min = 5000, + .tDS_min = 10000, + .tFEAT_max = 1000000, + .tIR_min = 0, + .tITC_max = 1000000, + .tRC_min = 25000, + .tREA_max = 20000, + .tREH_min = 10000, + .tRHOH_min = 15000, + .tRHW_min = 100000, + .tRHZ_max = 100000, + .tRLOH_min = 5000, + .tRP_min = 12000, + .tRR_min = 20000, + .tRST_max = 500000000, + .tWB_max = 100000, + .tWC_min = 25000, + .tWH_min = 10000, + .tWHR_min = 80000, + .tWP_min = 12000, + .tWW_min = 100000, + }, + /* Mode 5 */ + { + .tADL_min = 70000, + .tALH_min = 5000, + .tALS_min = 10000, + .tAR_min = 10000, + .tCEA_max = 25000, + .tCEH_min = 20000, + .tCH_min = 5000, + .tCHZ_max = 30000, + .tCLH_min = 5000, + .tCLR_min = 10000, + .tCLS_min = 10000, + .tCOH_min = 15000, + .tCS_min = 15000, + .tDH_min = 5000, + .tDS_min = 7000, + .tFEAT_max = 1000000, + .tIR_min = 0, + .tITC_max = 1000000, + .tRC_min = 20000, + .tREA_max = 16000, + .tREH_min = 7000, + .tRHOH_min = 15000, + .tRHW_min = 100000, + .tRHZ_max = 100000, + .tRLOH_min = 5000, + .tRP_min = 10000, + .tRR_min = 20000, + .tRST_max = 500000000, + .tWB_max = 100000, + .tWC_min = 20000, + .tWH_min = 7000, + .tWHR_min = 80000, + .tWP_min = 10000, + .tWW_min = 100000, + }, +}; + +/** + * onfi_async_timing_mode_to_sdr_timings - [NAND Interface] Retrieve NAND + * timings according to the given ONFI timing mode + * @mode: ONFI timing mode + */ +const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode) +{ + if (mode < 0 || mode > ARRAY_SIZE(onfi_sdr_timings)) + return ERR_PTR(-EINVAL); + + return &onfi_sdr_timings[mode]; +} +EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings); diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index f3ff3a3..b8e3c2b 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -847,6 +847,7 @@ static inline bool nand_is_slc(struct nand_chip *chip) return chip->bits_per_cell == 1; } + /** * struct nand_sdr_timings - SDR NAND chip timings * @@ -895,4 +896,7 @@ struct nand_sdr_timings { u32 tWW_min; }; +/* convert an ONFI timing mode to its timing characteristics. */ +const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode); + #endif /* __LINUX_MTD_NAND_H */
Add a converter to retrieve NAND timings from an ONFI NAND timing mode. This only support SDR NAND timings for now. Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com> --- drivers/mtd/nand/Makefile | 2 +- drivers/mtd/nand/nand_timings.c | 248 +++++++++++++++++++++++++++++++++++++++ include/linux/mtd/nand.h | 4 + 3 files changed, 253 insertions(+), 1 deletion(-) create mode 100644 drivers/mtd/nand/nand_timings.c