summaryrefslogtreecommitdiff
path: root/board/atmel/at91sam9261ek/nand.c
diff options
context:
space:
mode:
authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2008-05-24 12:56:53 +0200
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2008-05-24 12:56:53 +0200
commit42fd5f87b1613d3039f57e93c16f760a768d3e84 (patch)
tree9dd0252fca37dbdb1148ce7fd44dc5c9dd8a6b34 /board/atmel/at91sam9261ek/nand.c
parent2c8d41969b47eb0b973912830c58689b2ba0e50a (diff)
parent54694a91428f6c3280fe1ee0923488a1e7e8dbc4 (diff)
downloadu-boot-imx-42fd5f87b1613d3039f57e93c16f760a768d3e84.zip
u-boot-imx-42fd5f87b1613d3039f57e93c16f760a768d3e84.tar.gz
u-boot-imx-42fd5f87b1613d3039f57e93c16f760a768d3e84.tar.bz2
Merging Stelian Pop AT91 patches
Merge branch 'testing-V2' Conflicts: board/atmel/at91cap9adk/Makefile Fixing copyright board/atmel/at91sam9260ek/Makefile Fixing copyright board/atmel/at91sam9260ek/u-boot.lds Delete no more needed ld script Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'board/atmel/at91sam9261ek/nand.c')
-rw-r--r--board/atmel/at91sam9261ek/nand.c79
1 files changed, 79 insertions, 0 deletions
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 <stelian.pop@leadtechdesign.com>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * (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 <common.h>
+#include <asm/arch/at91sam9261.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/at91_pio.h>
+
+#include <nand.h>
+
+/*
+ * 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;
+}