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