[people/ms/u-boot.git] / board / nc650 / nand.c

/*
 * (C) Copyright 2006 Detlev Zundel, dzu@denx.de
 * (C) Copyright 2006 DENX Software Engineering
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>


#if (CONFIG_COMMANDS & CFG_CMD_NAND) || defined(CONFIG_CMD_NAND)

#include <nand.h>

#if defined(CONFIG_IDS852_REV1)
/*
 *	hardware specific access to control-lines
 */
static void nc650_hwcontrol(struct mtd_info *mtd, int cmd)
{
	struct nand_chip *this = mtd->priv;

	switch(cmd) {
	case NAND_CTL_SETCLE:
		this->IO_ADDR_W += 2;
		break;
	case NAND_CTL_CLRCLE:
		this->IO_ADDR_W -= 2;
		break;
	case NAND_CTL_SETALE:
		this->IO_ADDR_W += 1;
		break;
	case NAND_CTL_CLRALE:
		this->IO_ADDR_W -= 1;
		break;
	case NAND_CTL_SETNCE:
	case NAND_CTL_CLRNCE:
		/* nop */
		break;
	}
}
#elif defined(CONFIG_IDS852_REV2)
/*
 *	hardware specific access to control-lines
 */
static void nc650_hwcontrol(struct mtd_info *mtd, int cmd)
{
	struct nand_chip *this = mtd->priv;

	switch(cmd) {
	case NAND_CTL_SETCLE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0xa) = 0;
		break;
	case NAND_CTL_CLRCLE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0;
		break;
	case NAND_CTL_SETALE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0x9) = 0;
		break;
	case NAND_CTL_CLRALE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0;
		break;
	case NAND_CTL_SETNCE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0;
		break;
	case NAND_CTL_CLRNCE:
		*(((volatile __u8 *) this->IO_ADDR_W) + 0xc) = 0;
		break;
	}
}
#else
#error Unknown IDS852 module revision
#endif

/*
 * Board-specific NAND initialization. The following members of the
 * argument are board-specific (per include/linux/mtd/nand.h):
 * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
 * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
 * - hwcontrol: hardwarespecific function for accesing control-lines
 * - dev_ready: hardwarespecific function for  accesing device ready/busy line
 * - enable_hwecc?: function to enable (reset)  hardware ecc generator. Must
 *   only be provided if a hardware ECC is available
 * - eccmode: mode of ecc, see defines
 * - chip_delay: chip dependent delay for transfering data from array to
 *   read regs (tR)
 * - options: various chip options. They can partly be set to inform
 *   nand_scan about special functionality. See the defines for further
 *   explanation
 * Members with a "?" were not set in the merged testing-NAND branch,
 * so they are not set here either.
 */
int board_nand_init(struct nand_chip *nand)
{

	nand->hwcontrol = nc650_hwcontrol;
	nand->eccmode = NAND_ECC_SOFT;
	nand->chip_delay = 12;
/*	nand->options = NAND_SAMSUNG_LP_OPTIONS;*/
	return 0;
}
#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
Commit	Line	Data
56a4a63c	1	/*
	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>
	25
	26
9107ebe0	27	#if (CONFIG_COMMANDS & CFG_CMD_NAND) \|\| defined(CONFIG_CMD_NAND)
56a4a63c	28
	29	#include <nand.h>
	30
	31	#if defined(CONFIG_IDS852_REV1)
	32	/*
	33	* hardware specific access to control-lines
	34	*/
	35	static void nc650_hwcontrol(struct mtd_info *mtd, int cmd)
	36	{
	37	struct nand_chip *this = mtd->priv;
	38
	39	switch(cmd) {
610cf367 WD	40	case NAND_CTL_SETCLE:
	41	this->IO_ADDR_W += 2;
	42	break;
	43	case NAND_CTL_CLRCLE:
	44	this->IO_ADDR_W -= 2;
	45	break;
	46	case NAND_CTL_SETALE:
	47	this->IO_ADDR_W += 1;
	48	break;
	49	case NAND_CTL_CLRALE:
	50	this->IO_ADDR_W -= 1;
	51	break;
	52	case NAND_CTL_SETNCE:
	53	case NAND_CTL_CLRNCE:
	54	/* nop */
	55	break;
56a4a63c	56	}
	57	}
	58	#elif defined(CONFIG_IDS852_REV2)
	59	/*
	60	* hardware specific access to control-lines
	61	*/
	62	static void nc650_hwcontrol(struct mtd_info *mtd, int cmd)
	63	{
	64	struct nand_chip *this = mtd->priv;
	65
	66	switch(cmd) {
610cf367 WD	67	case NAND_CTL_SETCLE:
	68	(((volatile __u8 ) this->IO_ADDR_W) + 0xa) = 0;
	69	break;
	70	case NAND_CTL_CLRCLE:
	71	(((volatile __u8 ) this->IO_ADDR_W) + 0x8) = 0;
	72	break;
	73	case NAND_CTL_SETALE:
	74	(((volatile __u8 ) this->IO_ADDR_W) + 0x9) = 0;
	75	break;
	76	case NAND_CTL_CLRALE:
	77	(((volatile __u8 ) this->IO_ADDR_W) + 0x8) = 0;
	78	break;
	79	case NAND_CTL_SETNCE:
	80	(((volatile __u8 ) this->IO_ADDR_W) + 0x8) = 0;
	81	break;
	82	case NAND_CTL_CLRNCE:
	83	(((volatile __u8 ) this->IO_ADDR_W) + 0xc) = 0;
	84	break;
56a4a63c	85	}
	86	}
	87	#else
	88	#error Unknown IDS852 module revision
	89	#endif
	90
	91	/*
	92	* Board-specific NAND initialization. The following members of the
	93	* argument are board-specific (per include/linux/mtd/nand.h):
	94	* - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
	95	* - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
	96	* - hwcontrol: hardwarespecific function for accesing control-lines
	97	* - dev_ready: hardwarespecific function for accesing device ready/busy line
	98	* - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
	99	* only be provided if a hardware ECC is available
	100	* - eccmode: mode of ecc, see defines
	101	* - chip_delay: chip dependent delay for transfering data from array to
	102	* read regs (tR)
	103	* - options: various chip options. They can partly be set to inform
	104	* nand_scan about special functionality. See the defines for further
	105	* explanation
	106	* Members with a "?" were not set in the merged testing-NAND branch,
	107	* so they are not set here either.
	108	*/
fa230445	109	int board_nand_init(struct nand_chip *nand)
56a4a63c	110	{
	111
	112	nand->hwcontrol = nc650_hwcontrol;
	113	nand->eccmode = NAND_ECC_SOFT;
	114	nand->chip_delay = 12;
	115	/* nand->options = NAND_SAMSUNG_LP_OPTIONS;*/
fa230445	116	return 0;
56a4a63c	117	}
56a4a63c	118	#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */