board-nand.c

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/*
 * linux/arch/arm/mach-omap1/board-nand.c
 *
 * Common OMAP1 board NAND code
 *
 * Copyright (C) 2004, 2012 Texas Instruments, Inc.
 * Copyright (C) 2002 MontaVista Software, Inc.
 * Copyright (C) 2001 RidgeRun, Inc.
 * Author: RidgeRun, Inc.
 *         Greg Lonnon ([email protected]) or [email protected]
 *
 * 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/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>

#include "common.h"

void omap1_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
    struct nand_chip *this = mtd->priv;
    unsigned long mask;

    if (cmd == NAND_CMD_NONE)
        return;

    mask = (ctrl & NAND_CLE) ? 0x02 : 0;
    if (ctrl & NAND_ALE)
        mask |= 0x04;

    writeb(cmd, this->IO_ADDR_W + mask);
}