/*
   * 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 (glonnon@ridgerun.com) or info@ridgerun.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/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);
  }