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
omap1_nand_cmd_ctl(struct nand_chip * this,int cmd,unsigned int ctrl)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
34