// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2014 Free Electrons * * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> #include <linux/kernel.h>#include <linux/err.h>#include <linux/export.h>#include "internals.h" #define ONFI_DYN_TIMING_MAX U16_MAX/* * 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. * * These four values are tweaked to be more accurate in the case of ONFI chips. static const struct nand_interface_config onfi_sdr_timings[] = {/* Mode 0 */ /* Mode 1 */ /* Mode 2 */ /* Mode 3 */ /* Mode 4 */ /* Mode 5 */ static const struct nand_interface_config onfi_nvddr_timings[] = {/* Mode 0 */ /* Mode 1 */ /* Mode 2 */ /* Mode 3 */ /* Mode 4 */ /* Mode 5 */ /* All NAND chips share the same reset data interface: SDR mode 0 */ const struct nand_interface_config *nand_get_reset_interface_config(void )return &onfi_sdr_timings[0];/** * onfi_find_closest_sdr_mode - Derive the closest ONFI SDR timing mode given a * set of timings * @spec_timings: the timings to challenge unsigned int const struct nand_sdr_timings *spec_timings)const struct nand_sdr_timings *onfi_timings;int mode;for (mode = ARRAY_SIZE(onfi_sdr_timings) - 1; mode > 0; mode--) {if (spec_timings->tCCS_min <= onfi_timings->tCCS_min &&return mode;return 0;/** * onfi_find_closest_nvddr_mode - Derive the closest ONFI NVDDR timing mode * given a set of timings * @spec_timings: the timings to challenge unsigned int const struct nand_nvddr_timings *spec_timings)const struct nand_nvddr_timings *onfi_timings;int mode;for (mode = ARRAY_SIZE(onfi_nvddr_timings) - 1; mode > 0; mode--) {if (spec_timings->tCCS_min <= onfi_timings->tCCS_min &&return mode;return 0;/* * onfi_fill_sdr_interface_config - Initialize a SDR 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_sdr_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_sdr_timings)))return ;/* * Initialize timings that cannot be deduced from timing mode: * tPROG, tBERS, tR and tCCS. * These information are part of the ONFI parameter page. if (onfi) {struct nand_sdr_timings *timings = &iface->timings.sdr;/* microseconds -> picoseconds */ /* nanoseconds -> picoseconds */ /** * 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 ;/* * 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 */ /* nanoseconds -> picoseconds */ if (onfi->fast_tCAD)/** * onfi_fill_interface_config - Initialize an interface config from a given * ONFI mode * @chip: The NAND chip * @iface: The interface configuration to fill * @type: The interface type * @timing_mode: The ONFI timing mode void onfi_fill_interface_config(struct nand_chip *chip,struct nand_interface_config *iface,enum nand_interface_type type,unsigned int timing_mode)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);
Messung V0.5 C=90 H=88 G=88
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet)
¤ *© Formatika GbR, Deutschland
