From d99a8ff66d8ae87e5c87590ed2e4ead629540607 Mon Sep 17 00:00:00 2001 From: Stelian Pop Date: Thu, 8 May 2008 20:52:22 +0200 Subject: AT91SAM9261EK support This patch adds support for the AT91SAM9261 chip and the AT91SAM9261EK board. Signed-off-by: Stelian Pop Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- board/atmel/at91sam9261ek/nand.c | 79 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 board/atmel/at91sam9261ek/nand.c (limited to 'board/atmel/at91sam9261ek/nand.c') diff --git a/board/atmel/at91sam9261ek/nand.c b/board/atmel/at91sam9261ek/nand.c new file mode 100644 index 0000000..35b26db --- /dev/null +++ b/board/atmel/at91sam9261ek/nand.c @@ -0,0 +1,79 @@ +/* + * (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 << 22) /* our ALE is AD22 */ +#define MASK_CLE (1 << 21) /* our CLE is AD21 */ + +static void at91sam9261ek_nand_hwcontrol(struct mtd_info *mtd, int cmd) +{ + struct nand_chip *this = mtd->priv; + ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; + + IO_ADDR_W &= ~(MASK_ALE|MASK_CLE); + switch (cmd) { + case NAND_CTL_SETCLE: + IO_ADDR_W |= MASK_CLE; + break; + case NAND_CTL_SETALE: + IO_ADDR_W |= MASK_ALE; + break; + case NAND_CTL_CLRNCE: + at91_set_gpio_value(AT91_PIN_PC14, 1); + break; + case NAND_CTL_SETNCE: + at91_set_gpio_value(AT91_PIN_PC14, 0); + break; + } + this->IO_ADDR_W = (void *) IO_ADDR_W; +} + +static int at91sam9261ek_nand_ready(struct mtd_info *mtd) +{ + return at91_get_gpio_value(AT91_PIN_PC15); +} + +int board_nand_init(struct nand_chip *nand) +{ + nand->eccmode = NAND_ECC_SOFT; +#ifdef CFG_NAND_DBW_16 + nand->options = NAND_BUSWIDTH_16; +#endif + nand->hwcontrol = at91sam9261ek_nand_hwcontrol; + nand->dev_ready = at91sam9261ek_nand_ready; + nand->chip_delay = 20; + + return 0; +} -- cgit v1.1