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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/arch/arm/mach-omap1/board-nand.c
   4 *
   5 * Common OMAP1 board NAND code
   6 *
   7 * Copyright (C) 2004, 2012 Texas Instruments, Inc.
   8 * Copyright (C) 2002 MontaVista Software, Inc.
   9 * Copyright (C) 2001 RidgeRun, Inc.
  10 * Author: RidgeRun, Inc.
  11 *         Greg Lonnon (glonnon@ridgerun.com) or info@ridgerun.com
  12 */
  13#include <linux/kernel.h>
  14#include <linux/io.h>
  15#include <linux/mtd/mtd.h>
  16#include <linux/mtd/rawnand.h>
  17
  18#include "common.h"
  19
  20void omap1_nand_cmd_ctl(struct nand_chip *this, int cmd, unsigned int ctrl)
  21{
  22        unsigned long mask;
  23
  24        if (cmd == NAND_CMD_NONE)
  25                return;
  26
  27        mask = (ctrl & NAND_CLE) ? 0x02 : 0;
  28        if (ctrl & NAND_ALE)
  29                mask |= 0x04;
  30
  31        writeb(cmd, this->legacy.IO_ADDR_W + mask);
  32}
  33
  34