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94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <asm/io.h>
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#include <asm/immap.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_CMD_NAND)
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#include <nand.h>
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#include <linux/mtd/mtd.h>
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#define SET_CLE 0x10
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#define SET_ALE 0x08
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static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
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{
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struct nand_chip *this = mtdinfo->priv;
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volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR;
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if (ctrl & NAND_CTRL_CHANGE) {
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ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
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IO_ADDR_W &= ~(SET_ALE | SET_CLE);
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if (ctrl & NAND_NCE)
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*nCE &= 0xFFFB;
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else
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*nCE |= 0x0004;
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if (ctrl & NAND_CLE)
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IO_ADDR_W |= SET_CLE;
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if (ctrl & NAND_ALE)
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IO_ADDR_W |= SET_ALE;
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this->IO_ADDR_W = (void *)IO_ADDR_W;
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}
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if (cmd != NAND_CMD_NONE)
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writeb(cmd, this->IO_ADDR_W);
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}
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int board_nand_init(struct nand_chip *nand)
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{
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gpio_t *gpio = (gpio_t *) MMAP_GPIO;
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fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
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clrbits_be32(&fbcs->csmr2, FBCS_CSMR_WP);
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/*
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* set up pin configuration - enabled 2nd output buffer's signals
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* (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc)
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* to use nCE signal
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*/
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clrbits_8(&gpio->par_timer, GPIO_PAR_TIN3_TIN3);
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setbits_8(&gpio->pddr_timer, 0x08);
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setbits_8(&gpio->ppd_timer, 0x08);
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out_8(&gpio->pclrr_timer, 0);
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out_8(&gpio->podr_timer, 0);
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nand->chip_delay = 60;
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nand->ecc.mode = NAND_ECC_SOFT;
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nand->cmd_ctrl = nand_hwcontrol;
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return 0;
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}
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#endif
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