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authorWolfgang Denk <wd@denx.de>2009-03-26 22:27:45 +0100
committerWolfgang Denk <wd@denx.de>2009-03-26 22:27:45 +0100
commitaaa0e0812ffdf861993129f41936eb175a2eaa5f (patch)
tree2f729e92c83925a5acb9f204e381878928c2c57f /drivers/mtd
parent99a4ffe202d8bc1d3c4faff9b8258b686ef656ca (diff)
parentdf486b1fa3f750b153eac7daa0b3bf1f594e5098 (diff)
downloadblackbird-obmc-uboot-aaa0e0812ffdf861993129f41936eb175a2eaa5f.tar.gz
blackbird-obmc-uboot-aaa0e0812ffdf861993129f41936eb175a2eaa5f.zip
Merge branch 'master' of git://git.denx.de/u-boot-at91
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/Makefile1
-rw-r--r--drivers/mtd/nand/atmel_nand.c78
2 files changed, 79 insertions, 0 deletions
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 5974d7768d..03b0028e7c 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -35,6 +35,7 @@ COBJS-y += nand_ids.o
COBJS-y += nand_util.o
endif
+COBJS-$(CONFIG_NAND_ATMEL) += atmel_nand.o
COBJS-$(CONFIG_DRIVER_NAND_BFIN) += bfin_nand.o
COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
new file mode 100644
index 0000000000..40002be417
--- /dev/null
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -0,0 +1,78 @@
+/*
+ * (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/hardware.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/at91_pio.h>
+
+#include <nand.h>
+
+static void at91_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 &= ~(CONFIG_SYS_NAND_MASK_ALE
+ | CONFIG_SYS_NAND_MASK_CLE);
+
+ if (ctrl & NAND_CLE)
+ IO_ADDR_W |= CONFIG_SYS_NAND_MASK_CLE;
+ if (ctrl & NAND_ALE)
+ IO_ADDR_W |= CONFIG_SYS_NAND_MASK_ALE;
+
+ at91_set_gpio_value(CONFIG_SYS_NAND_ENABLE_PIN,
+ !(ctrl & NAND_NCE));
+ this->IO_ADDR_W = (void *) IO_ADDR_W;
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
+}
+
+#ifdef CONFIG_SYS_NAND_READY_PIN
+static int at91_nand_ready(struct mtd_info *mtd)
+{
+ return at91_get_gpio_value(CONFIG_SYS_NAND_READY_PIN);
+}
+#endif
+
+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 = at91_nand_hwcontrol;
+#ifdef CONFIG_SYS_NAND_READY_PIN
+ nand->dev_ready = at91_nand_ready;
+#endif
+ nand->chip_delay = 20;
+
+ return 0;
+}
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