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
  20 void 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