From 1079432e04ccf71aa3684181186182cd63512f19 Mon Sep 17 00:00:00 2001 From: Sergey Lapin Date: Fri, 31 Oct 2008 12:28:43 +0100 Subject: Custom AFEB9260 board support This patch provides support for AFEB9260 board, a product of OpenSource hardware and software. Some commertial projects are made with this design. A board is basically AT91SAM9260-EK with some modifications and different peripherals and different parts used. Main purpose of this project is to gain experience in hardware design. More info: http://groups.google.com/group/arm9fpga-evolution-board (In Russian only, sorry). Subversion repository: svn://194.85.238.22/home/users/george/svn/arm9eb Signed-off-by: Sergey Lapin --- board/afeb9260/nand.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 board/afeb9260/nand.c (limited to 'board/afeb9260/nand.c') diff --git a/board/afeb9260/nand.c b/board/afeb9260/nand.c new file mode 100644 index 0000000..c5ac634 --- /dev/null +++ b/board/afeb9260/nand.c @@ -0,0 +1,78 @@ +/* + * (C) Copyright 2007-2008 + * Stelian Pop + * Lead Tech Design + * + * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas + * + * 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 +#include +#include +#include + +#include + +/* + * hardware specific access to control-lines + */ +#define MASK_ALE (1 << 21) /* our ALE is AD21 */ +#define MASK_CLE (1 << 22) /* our CLE is AD22 */ + +static void at91sam9260ek_nand_hwcontrol(struct mtd_info *mtd, + int cmd, unsigned int ctrl) +{ + struct nand_chip *this = mtd->priv; + + if (ctrl & NAND_CTRL_CHANGE) { + ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; + IO_ADDR_W &= ~(MASK_ALE | MASK_CLE); + + if (ctrl & NAND_CLE) + IO_ADDR_W |= MASK_CLE; + if (ctrl & NAND_ALE) + IO_ADDR_W |= MASK_ALE; + + at91_set_gpio_value(AT91_PIN_PC14, !(ctrl & NAND_NCE)); + this->IO_ADDR_W = (void *) IO_ADDR_W; + } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); +} + +static int at91sam9260ek_nand_ready(struct mtd_info *mtd) +{ + return at91_get_gpio_value(AT91_PIN_PC13); +} + +int board_nand_init(struct nand_chip *nand) +{ + nand->ecc.mode = NAND_ECC_SOFT; +#ifdef CONFIG_SYS_NAND_DBW_16 + nand->options = NAND_BUSWIDTH_16; +#endif + nand->cmd_ctrl = at91sam9260ek_nand_hwcontrol; + nand->dev_ready = at91sam9260ek_nand_ready; + nand->chip_delay = 20; + + return 0; +} -- cgit v1.1