board/tqc/tqm8272/nand.c - uboot/prism - Git at Google

 /*
  * (C) Copyright 2008
  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
  *
  * 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>
 #include <ioports.h>
 #include <mpc8260.h>

 #include "tqm8272.h"

 /* UPM pattern for bus clock = 66.7 MHz */
 static const uint upmTable67[] =
 {
     /* Offset	UPM Read Single RAM array entry -> NAND Read Data */
     /* 0x00 */	0x0fa3f100, 0x0fa3b000, 0x0fa33100, 0x0fa33000,
     /* 0x04 */	0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x08 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x0C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x10 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x14 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
     /* 0x18 */	0x00a3fc00, 0x00a3fc00, 0x00a3fc00, 0x00a3fc00,
     /* 0x1C */	0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

 		/* UPM Write Burst RAM array entry -> unused */
     /* 0x20 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x24 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x28 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x2C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Refresh Timer RAM array entry -> unused */
     /* 0x30 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x34 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x38 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Exception RAM array entry -> unsused */
     /* 0x3C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 };

 /* UPM pattern for bus clock = 100 MHz */
 static const uint upmTable100[] =
 {
     /* Offset	UPM Read Single RAM array entry -> NAND Read Data */
     /* 0x00 */	0x0fa3f200, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
     /* 0x04 */	0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x08 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x0C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x10 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x14 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
     /* 0x18 */	0x00a3ff00, 0x00a3fc00, 0x00a3fc00, 0x0fa3fc00,
     /* 0x1C */	0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

 		/* UPM Write Burst RAM array entry -> unused */
     /* 0x20 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x24 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x28 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x2C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Refresh Timer RAM array entry -> unused */
     /* 0x30 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x34 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x38 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Exception RAM array entry -> unsused */
     /* 0x3C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 };

 /* UPM pattern for bus clock = 133.3 MHz */
 static const uint upmTable133[] =
 {
     /* Offset	UPM Read Single RAM array entry -> NAND Read Data */
     /* 0x00 */	0x0fa3f300, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
     /* 0x04 */	0x0fa33200, 0x0fa33004, 0xfffffc01, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x08 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x0C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Read Burst RAM array entry -> unused */
     /* 0x10 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x14 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

 		/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
     /* 0x18 */	0x00a3ff00, 0x00a3fc00, 0x00a3fd00, 0x0fa3fc00,
     /* 0x1C */	0x0fa3fd00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

 		/* UPM Write Burst RAM array entry -> unused */
     /* 0x20 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x24 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x28 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x2C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Refresh Timer RAM array entry -> unused */
     /* 0x30 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x34 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
     /* 0x38 */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

 		/* UPM Exception RAM array entry -> unsused */
     /* 0x3C */	0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 };

 static int	chipsel = 0;

 #if defined(CONFIG_CMD_NAND)

 #include <nand.h>
 #include <linux/mtd/mtd.h>

 static u8 hwctl = 0;

 static void upmnand_write_byte(struct mtd_info *mtdinfo, u_char byte)
 {
 	struct nand_chip *this = mtdinfo->priv;
 	ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);

 	if (hwctl & 0x1) {
 		WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_CMD_OFS);
 	} else if (hwctl & 0x2) {
 		WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_ADDR_OFS);
 	} else {
 		WRITE_NAND(byte, base);
 	}
 }

 static void upmnand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 {
 	if (ctrl & NAND_CTRL_CHANGE) {
 		if ( ctrl & NAND_CLE )
 			hwctl |= 0x1;
 		else
 			hwctl &= ~0x1;
 		if ( ctrl & NAND_ALE )
 			hwctl |= 0x2;
 		else
 			hwctl &= ~0x2;
 	}
 	if (cmd != NAND_CMD_NONE)
 		upmnand_write_byte (mtd, cmd);
 }

 static u_char upmnand_read_byte(struct mtd_info *mtdinfo)
 {
 	struct nand_chip *this = mtdinfo->priv;
 	ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);

 	return READ_NAND(base);
 }

 static int tqm8272_dev_ready(struct mtd_info *mtdinfo)
 {
 	/* constant delay (see also tR in the datasheet) */
 	udelay(12); \
 	return 1;
 }

 #ifndef CONFIG_NAND_SPL
 static void tqm8272_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
 {
 	struct nand_chip *this = mtdinfo->priv;
 	unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 	int	i;

 	for (i = 0; i< len; i++)
 		buf[i] = *base;
 }

 static void tqm8272_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
 {
 	struct nand_chip *this = mtdinfo->priv;
 	unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 	int	i;

 	for (i = 0; i< len; i++)
 		*base = buf[i];
 }

 static int tqm8272_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
 {
 	struct nand_chip *this = mtdinfo->priv;
 	unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 	int	i;

 	for (i = 0; i < len; i++)
 		if (buf[i] != *base)
 			return -1;
 	return 0;
 }
 #endif /* #ifndef CONFIG_NAND_SPL */

 void board_nand_select_device(struct nand_chip *nand, int chip)
 {
 	chipsel = chip;
 }

 int board_nand_init(struct nand_chip *nand)
 {
 	static	int	UpmInit = 0;
 	volatile immap_t * immr = (immap_t *)CONFIG_SYS_IMMR;
 	volatile memctl8260_t *memctl = &immr->im_memctl;

 	if (hwinf.nand == 0) return -1;

 	/* Setup the UPM */
 	if (UpmInit == 0) {
 		switch (hwinf.busclk_real) {
 		case 100000000:
 			upmconfig (UPMB, (uint *) upmTable100,
 			   sizeof (upmTable100) / sizeof (uint));
 			break;
 		case 133333333:
 			upmconfig (UPMB, (uint *) upmTable133,
 			   sizeof (upmTable133) / sizeof (uint));
 			break;
 		default:
 			upmconfig (UPMB, (uint *) upmTable67,
 			   sizeof (upmTable67) / sizeof (uint));
 			break;
 		}
 		UpmInit = 1;
 	}

 	/* Setup the memctrl */
 	memctl->memc_or3 = CONFIG_SYS_NAND_OR;
 	memctl->memc_br3 = CONFIG_SYS_NAND_BR;
 	memctl->memc_mbmr = (MxMR_OP_NORM);

 	nand->ecc.mode = NAND_ECC_SOFT;

 	nand->cmd_ctrl	 = upmnand_hwcontrol;
 	nand->read_byte	 = upmnand_read_byte;
 	nand->dev_ready	 = tqm8272_dev_ready;

 #ifndef CONFIG_NAND_SPL
 	nand->write_buf	 = tqm8272_write_buf;
 	nand->read_buf	 = tqm8272_read_buf;
 	nand->verify_buf = tqm8272_verify_buf;
 #endif

 	/*
 	 * Select required NAND chip
 	 */
 	board_nand_select_device(nand, 0);
 	return 0;
 }

 #endif
	/*
	* (C) Copyright 2008
	* Heiko Schocher, DENX Software Engineering, hs@denx.de.
	*
	* 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>
	#include <ioports.h>
	#include <mpc8260.h>

	#include "tqm8272.h"

	/* UPM pattern for bus clock = 66.7 MHz */
	static const uint upmTable67[] =
	{
	/* Offset UPM Read Single RAM array entry -> NAND Read Data */
	/* 0x00 */ 0x0fa3f100, 0x0fa3b000, 0x0fa33100, 0x0fa33000,
	/* 0x04 */ 0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x08 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x10 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
	/* 0x18 */ 0x00a3fc00, 0x00a3fc00, 0x00a3fc00, 0x00a3fc00,
	/* 0x1C */ 0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

	/* UPM Write Burst RAM array entry -> unused */
	/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Refresh Timer RAM array entry -> unused */
	/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Exception RAM array entry -> unsused */
	/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
	};

	/* UPM pattern for bus clock = 100 MHz */
	static const uint upmTable100[] =
	{
	/* Offset UPM Read Single RAM array entry -> NAND Read Data */
	/* 0x00 */ 0x0fa3f200, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
	/* 0x04 */ 0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x08 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x10 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
	/* 0x18 */ 0x00a3ff00, 0x00a3fc00, 0x00a3fc00, 0x0fa3fc00,
	/* 0x1C */ 0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

	/* UPM Write Burst RAM array entry -> unused */
	/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Refresh Timer RAM array entry -> unused */
	/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Exception RAM array entry -> unsused */
	/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
	};

	/* UPM pattern for bus clock = 133.3 MHz */
	static const uint upmTable133[] =
	{
	/* Offset UPM Read Single RAM array entry -> NAND Read Data */
	/* 0x00 */ 0x0fa3f300, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
	/* 0x04 */ 0x0fa33200, 0x0fa33004, 0xfffffc01, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x08 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Read Burst RAM array entry -> unused */
	/* 0x10 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,

	/* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
	/* 0x18 */ 0x00a3ff00, 0x00a3fc00, 0x00a3fd00, 0x0fa3fc00,
	/* 0x1C */ 0x0fa3fd00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,

	/* UPM Write Burst RAM array entry -> unused */
	/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Refresh Timer RAM array entry -> unused */
	/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
	/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,

	/* UPM Exception RAM array entry -> unsused */
	/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
	};

	static int chipsel = 0;

	#if defined(CONFIG_CMD_NAND)

	#include <nand.h>
	#include <linux/mtd/mtd.h>

	static u8 hwctl = 0;

	static void upmnand_write_byte(struct mtd_info *mtdinfo, u_char byte)
	{
	struct nand_chip *this = mtdinfo->priv;
	ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);

	if (hwctl & 0x1) {
	WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_CMD_OFS);
	} else if (hwctl & 0x2) {
	WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_ADDR_OFS);
	} else {
	WRITE_NAND(byte, base);
	}
	}

	static void upmnand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
	{
	if (ctrl & NAND_CTRL_CHANGE) {
	if ( ctrl & NAND_CLE )
	hwctl \|= 0x1;
	else
	hwctl &= ~0x1;
	if ( ctrl & NAND_ALE )
	hwctl \|= 0x2;
	else
	hwctl &= ~0x2;
	}
	if (cmd != NAND_CMD_NONE)
	upmnand_write_byte (mtd, cmd);
	}

	static u_char upmnand_read_byte(struct mtd_info *mtdinfo)
	{
	struct nand_chip *this = mtdinfo->priv;
	ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);

	return READ_NAND(base);
	}

	static int tqm8272_dev_ready(struct mtd_info *mtdinfo)
	{
	/* constant delay (see also tR in the datasheet) */
	udelay(12); \
	return 1;
	}

	#ifndef CONFIG_NAND_SPL
	static void tqm8272_read_buf(struct mtd_info mtdinfo, uint8_t buf, int len)
	{
	struct nand_chip *this = mtdinfo->priv;
	unsigned char base = (unsigned char ) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
	int i;

	for (i = 0; i< len; i++)
	buf[i] = *base;
	}

	static void tqm8272_write_buf(struct mtd_info mtdinfo, const uint8_t buf, int len)
	{
	struct nand_chip *this = mtdinfo->priv;
	unsigned char base = (unsigned char ) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
	int i;

	for (i = 0; i< len; i++)
	*base = buf[i];
	}

	static int tqm8272_verify_buf(struct mtd_info mtdinfo, const uint8_t buf, int len)
	{
	struct nand_chip *this = mtdinfo->priv;
	unsigned char base = (unsigned char ) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
	int i;

	for (i = 0; i < len; i++)
	if (buf[i] != *base)
	return -1;
	return 0;
	}
	#endif /* #ifndef CONFIG_NAND_SPL */

	void board_nand_select_device(struct nand_chip *nand, int chip)
	{
	chipsel = chip;
	}

	int board_nand_init(struct nand_chip *nand)
	{
	static int UpmInit = 0;
	volatile immap_t * immr = (immap_t *)CONFIG_SYS_IMMR;
	volatile memctl8260_t *memctl = &immr->im_memctl;

	if (hwinf.nand == 0) return -1;

	/* Setup the UPM */
	if (UpmInit == 0) {
	switch (hwinf.busclk_real) {
	case 100000000:
	upmconfig (UPMB, (uint *) upmTable100,
	sizeof (upmTable100) / sizeof (uint));
	break;
	case 133333333:
	upmconfig (UPMB, (uint *) upmTable133,
	sizeof (upmTable133) / sizeof (uint));
	break;
	default:
	upmconfig (UPMB, (uint *) upmTable67,
	sizeof (upmTable67) / sizeof (uint));
	break;
	}
	UpmInit = 1;
	}

	/* Setup the memctrl */
	memctl->memc_or3 = CONFIG_SYS_NAND_OR;
	memctl->memc_br3 = CONFIG_SYS_NAND_BR;
	memctl->memc_mbmr = (MxMR_OP_NORM);

	nand->ecc.mode = NAND_ECC_SOFT;

	nand->cmd_ctrl = upmnand_hwcontrol;
	nand->read_byte = upmnand_read_byte;
	nand->dev_ready = tqm8272_dev_ready;

	#ifndef CONFIG_NAND_SPL
	nand->write_buf = tqm8272_write_buf;
	nand->read_buf = tqm8272_read_buf;
	nand->verify_buf = tqm8272_verify_buf;
	#endif

	/*
	* Select required NAND chip
	*/
	board_nand_select_device(nand, 0);
	return 0;
	}

	#endif