mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-15 07:04:44 +00:00
Code Issues Releases Wiki Activity

mtd: rawnand: Add onfi_fill_nvddr_interface_config() helper

Browse source 
Same logic as for the SDR path, let's create a
onfi_fill_nvddr_interface_config() helper to fill an interface
configuration structure with NV-DDR timings, given a specific ONFI mode.

There is one additional thing to do compared to SDR mode: tCAD timing
can be fast or slow and this depends on an ONFI parameter page bit. By
default the slow value is declared in the timings structure definition,
but this helper can shrink it down if necessary.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210505213750.257417-12-miquel.raynal@bootlin.com
This commit is contained in:
Miquel Raynal 2021-05-05 23:37:39 +02:00
parent 94c8ce8e3e
commit 45606518f9
3 changed files with 44 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/mtd/nand/raw/nand_onfi.c
View file

@ -315,6 +315,7 @@ int nand_onfi_detect(struct nand_chip *chip)
onfi->tBERS = le16_to_cpu(p->t_bers);
onfi->tR = le16_to_cpu(p->t_r);
onfi->tCCS = le16_to_cpu(p->t_ccs);
onfi->fast_tCAD = p->nvddr_nvddr2_features & BIT(0);
onfi->sdr_timing_modes = le16_to_cpu(p->sdr_timing_modes);
if (p->features & ONFI_FEATURE_NV_DDR)
onfi->nvddr_timing_modes = p->nvddr_timing_modes;

41
drivers/mtd/nand/raw/nand_timings.c
View file

@ -636,6 +636,45 @@ static void onfi_fill_sdr_interface_config(struct nand_chip *chip,
}
}
/**
* onfi_fill_nvddr_interface_config - Initialize a NVDDR interface config from a
* given ONFI mode
* @chip: The NAND chip
* @iface: The interface configuration to fill
* @timing_mode: The ONFI timing mode
*/
static void onfi_fill_nvddr_interface_config(struct nand_chip *chip,
struct nand_interface_config *iface,
unsigned int timing_mode)
{
struct onfi_params *onfi = chip->parameters.onfi;
if (WARN_ON(timing_mode >= ARRAY_SIZE(onfi_nvddr_timings)))
return;
*iface = onfi_nvddr_timings[timing_mode];
/*
* Initialize timings that cannot be deduced from timing mode:
* tPROG, tBERS, tR, tCCS and tCAD.
* These information are part of the ONFI parameter page.
*/
if (onfi) {
struct nand_nvddr_timings *timings = &iface->timings.nvddr;
/* 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;
if (onfi->fast_tCAD)
timings->tCAD_min = 25000;
}
}
/**
* onfi_fill_interface_config - Initialize an interface config from a given
* ONFI mode
@ -651,4 +690,6 @@ void onfi_fill_interface_config(struct nand_chip *chip,
{
if (type == NAND_SDR_IFACE)
return onfi_fill_sdr_interface_config(chip, iface, timing_mode);
else
return onfi_fill_nvddr_interface_config(chip, iface, timing_mode);
}

2
include/linux/mtd/onfi.h
View file

@ -162,6 +162,7 @@ struct onfi_ext_param_page {
* @tBERS: Block erase time
* @tR: Page read time
* @tCCS: Change column setup time
* @fast_tCAD: Command/Address/Data slow or fast delay (NV-DDR only)
* @sdr_timing_modes: Supported asynchronous/SDR timing modes
* @nvddr_timing_modes: Supported source synchronous/NV-DDR timing modes
* @vendor_revision: Vendor specific revision number
@ -173,6 +174,7 @@ struct onfi_params {
u16 tBERS;
u16 tR;
u16 tCCS;
bool fast_tCAD;
u16 sdr_timing_modes;
u16 nvddr_timing_modes;
u16 vendor_revision;