1. 根目录:
2. drivers
3. mtd
4. nand
5. nand_timings.c

/*
 *  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/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 = 250000000000ULL,
		.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);