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https://github.com/AsahiLinux/u-boot
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69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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* (C) Copyright 2008
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* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de
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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 <common.h>
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#include <config.h>
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#if defined(CONFIG_CMD_NAND)
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#include <asm/ppc4xx-gpio.h>
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#include <asm/io.h>
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#include <nand.h>
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/*
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* hardware specific access to control-lines
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*/
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static void quad100hd_hwcontrol(struct mtd_info *mtd,
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int cmd, unsigned int ctrl)
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{
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struct nand_chip *this = mtd->priv;
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if (ctrl & NAND_CTRL_CHANGE) {
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gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE));
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gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE));
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gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE));
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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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static int quad100hd_nand_ready(struct mtd_info *mtd)
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{
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return gpio_read_in_bit(CONFIG_SYS_NAND_RDY);
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}
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/*
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* Main initialization routine
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*/
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int board_nand_init(struct nand_chip *nand)
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{
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/* Set address of hardware control function */
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nand->cmd_ctrl = quad100hd_hwcontrol;
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nand->dev_ready = quad100hd_nand_ready;
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nand->ecc.mode = NAND_ECC_SOFT;
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/* 15 us command delay time */
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nand->chip_delay = 20;
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/* Return happy */
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return 0;
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}
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#endif /* CONFIG_CMD_NAND */
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