LXR linux/arch/arm/mach-omap1/board-nand.c

   1/*
   2 * linux/arch/arm/mach-omap1/board-nand.c
   3 *
   4 * Common OMAP1 board NAND code
   5 *
   6 * Copyright (C) 2004, 2012 Texas Instruments, Inc.
   7 * Copyright (C) 2002 MontaVista Software, Inc.
   8 * Copyright (C) 2001 RidgeRun, Inc.
   9 * Author: RidgeRun, Inc.
  10 *         Greg Lonnon (glonnon@ridgerun.com) or info@ridgerun.com
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License version 2 as
  14 * published by the Free Software Foundation.
  15 */
  16#include <linux/kernel.h>
  17#include <linux/io.h>
  18#include <linux/mtd/mtd.h>
  19#include <linux/mtd/nand.h>
  20
  21#include "common.h"
  22
  23void omap1_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
  24{
  25        struct nand_chip *this = mtd->priv;
  26        unsigned long mask;
  27
  28        if (cmd == NAND_CMD_NONE)
  29                return;
  30
  31        mask = (ctrl & NAND_CLE) ? 0x02 : 0;
  32        if (ctrl & NAND_ALE)
  33                mask |= 0x04;
  34
  35        writeb(cmd, this->IO_ADDR_W + mask);
  36}
  37
  38