| /* |
| * Copyright (C) 2014 Free Electrons |
| * |
| * Author: Boris BREZILLON <boris.brezillon@free-electrons.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/kernel.h> |
| #include <linux/err.h> |
| #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 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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, |
| .tRR_min = 40000, |
| .tRST_max = 250000000000ULL, |
| .tWB_max = 200000, |
| .tWC_min = 100000, |
| .tWH_min = 30000, |
| .tWHR_min = 120000, |
| .tWP_min = 50000, |
| .tWW_min = 100000, |
| }, |
| }, |
| /* Mode 1 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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 */ |
| { |
| .type = NAND_SDR_IFACE, |
| .timings.sdr = { |
| .tCCS_min = 500000, |
| .tR_max = 200000000, |
| .tADL_min = 400000, |
| .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].timings.sdr; |
| } |
| EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings); |
| |
| /** |
| * onfi_fill_data_interface - [NAND Interface] Initialize a data interface from |
| * given ONFI mode |
| * @mode: The ONFI timing mode |
| */ |
| int onfi_fill_data_interface(struct nand_chip *chip, |
| enum nand_data_interface_type type, |
| 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; |
| |
| if (timing_mode < 0 || timing_mode >= ARRAY_SIZE(onfi_sdr_timings)) |
| return -EINVAL; |
| |
| *iface = onfi_sdr_timings[timing_mode]; |
| |
| /* |
| * 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 */ |
| 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 * ONFI_DYN_TIMING_MAX; |
| timings->tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX; |
| timings->tR_max = 1000000ULL * 200000000ULL; |
| |
| /* nanoseconds -> picoseconds */ |
| timings->tCCS_min = 1000UL * 500000; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(onfi_fill_data_interface); |
