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dzu@denx.de56a4a632006-04-19 15:27:11 +02001/*
2 * (C) Copyright 2006 Detlev Zundel, dzu@denx.de
3 * (C) Copyright 2006 DENX Software Engineering
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
William Juulcfa460a2007-10-31 13:53:06 +010025#include <asm/io.h>
dzu@denx.de56a4a632006-04-19 15:27:11 +020026
Jon Loeliger3fe00102007-07-09 18:38:39 -050027#if defined(CONFIG_CMD_NAND)
dzu@denx.de56a4a632006-04-19 15:27:11 +020028
29#include <nand.h>
30
31#if defined(CONFIG_IDS852_REV1)
32/*
33 * hardware specific access to control-lines
34 */
William Juulcfa460a2007-10-31 13:53:06 +010035static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
dzu@denx.de56a4a632006-04-19 15:27:11 +020036{
37 struct nand_chip *this = mtd->priv;
38
William Juul5e1dae52007-11-09 13:32:30 +010039 if (ctrl & NAND_CTRL_CHANGE) {
William Juulcfa460a2007-10-31 13:53:06 +010040 if ( ctrl & NAND_CLE )
41 this->IO_ADDR_W += 2;
42 else
43 this->IO_ADDR_W -= 2;
44 if ( ctrl & NAND_ALE )
45 this->IO_ADDR_W += 1;
46 else
47 this->IO_ADDR_W -= 1;
dzu@denx.de56a4a632006-04-19 15:27:11 +020048 }
William Juulcfa460a2007-10-31 13:53:06 +010049
William Juul5e1dae52007-11-09 13:32:30 +010050 if (cmd != NAND_CMD_NONE)
William Juul4cbb6512007-11-08 10:39:53 +010051 writeb(cmd, this->IO_ADDR_W);
dzu@denx.de56a4a632006-04-19 15:27:11 +020052}
53#elif defined(CONFIG_IDS852_REV2)
54/*
55 * hardware specific access to control-lines
56 */
William Juulcfa460a2007-10-31 13:53:06 +010057static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
dzu@denx.de56a4a632006-04-19 15:27:11 +020058{
59 struct nand_chip *this = mtd->priv;
60
William Juul5e1dae52007-11-09 13:32:30 +010061 if (ctrl & NAND_CTRL_CHANGE) {
William Juulcfa460a2007-10-31 13:53:06 +010062 if ( ctrl & NAND_CLE )
63 writeb(0, (volatile __u8 *) this->IO_ADDR_W + 0xa);
64 else
65 writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8);
66 if ( ctrl & NAND_ALE )
67 writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x9);
68 else
69 writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8);
70 if ( ctrl & NAND_NCE )
71 writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8);
72 else
73 writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0xc);
dzu@denx.de56a4a632006-04-19 15:27:11 +020074 }
William Juulcfa460a2007-10-31 13:53:06 +010075
William Juul5e1dae52007-11-09 13:32:30 +010076 if (cmd != NAND_CMD_NONE)
William Juulcfa460a2007-10-31 13:53:06 +010077 writeb(cmd, this->IO_ADDR_W);
dzu@denx.de56a4a632006-04-19 15:27:11 +020078}
79#else
80#error Unknown IDS852 module revision
81#endif
82
83/*
84 * Board-specific NAND initialization. The following members of the
85 * argument are board-specific (per include/linux/mtd/nand.h):
86 * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
87 * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
William Juulcfa460a2007-10-31 13:53:06 +010088 * - cmd_ctrl: hardwarespecific function for accesing control-lines
dzu@denx.de56a4a632006-04-19 15:27:11 +020089 * - dev_ready: hardwarespecific function for accesing device ready/busy line
90 * - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
91 * only be provided if a hardware ECC is available
William Juulcfa460a2007-10-31 13:53:06 +010092 * - eccm.ode: mode of ecc, see defines
dzu@denx.de56a4a632006-04-19 15:27:11 +020093 * - chip_delay: chip dependent delay for transfering data from array to
94 * read regs (tR)
95 * - options: various chip options. They can partly be set to inform
96 * nand_scan about special functionality. See the defines for further
97 * explanation
98 * Members with a "?" were not set in the merged testing-NAND branch,
99 * so they are not set here either.
100 */
Heiko Schocherfa230442006-12-21 17:17:02 +0100101int board_nand_init(struct nand_chip *nand)
dzu@denx.de56a4a632006-04-19 15:27:11 +0200102{
103
William Juulcfa460a2007-10-31 13:53:06 +0100104 nand->cmd_ctrl = nc650_hwcontrol;
105 nand->ecc.mode = NAND_ECC_SOFT;
dzu@denx.de56a4a632006-04-19 15:27:11 +0200106 nand->chip_delay = 12;
107/* nand->options = NAND_SAMSUNG_LP_OPTIONS;*/
Heiko Schocherfa230442006-12-21 17:17:02 +0100108 return 0;
dzu@denx.de56a4a632006-04-19 15:27:11 +0200109}
Jon Loeliger3fe00102007-07-09 18:38:39 -0500110#endif