summaryrefslogtreecommitdiff
path: root/board/quad100hd/nand.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/quad100hd/nand.c')
-rw-r--r--board/quad100hd/nand.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/board/quad100hd/nand.c b/board/quad100hd/nand.c
new file mode 100644
index 0000000..a36b89d
--- /dev/null
+++ b/board/quad100hd/nand.c
@@ -0,0 +1,79 @@
+/*
+ * (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/gpio.h>
+#include <nand.h>
+
+/*
+ * hardware specific access to control-lines
+ */
+static void quad100hd_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+ switch(cmd) {
+ case NAND_CTL_SETCLE:
+ gpio_write_bit(CFG_NAND_CLE, 1);
+ break;
+ case NAND_CTL_CLRCLE:
+ gpio_write_bit(CFG_NAND_CLE, 0);
+ break;
+
+ case NAND_CTL_SETALE:
+ gpio_write_bit(CFG_NAND_ALE, 1);
+ break;
+ case NAND_CTL_CLRALE:
+ gpio_write_bit(CFG_NAND_ALE, 0);
+ break;
+
+ case NAND_CTL_SETNCE:
+ gpio_write_bit(CFG_NAND_CE, 0);
+ break;
+ case NAND_CTL_CLRNCE:
+ gpio_write_bit(CFG_NAND_CE, 1);
+ break;
+ }
+}
+
+static int quad100hd_nand_ready(struct mtd_info *mtd)
+{
+ return gpio_read_in_bit(CFG_NAND_RDY);
+}
+
+/*
+ * Main initialization routine
+ */
+int board_nand_init(struct nand_chip *nand)
+{
+ /* Set address of hardware control function */
+ nand->hwcontrol = quad100hd_hwcontrol;
+ nand->dev_ready = quad100hd_nand_ready;
+ nand->eccmode = NAND_ECC_SOFT;
+ /* 15 us command delay time */
+ nand->chip_delay = 20;
+
+ /* Return happy */
+ return 0;
+}
+#endif /* CONFIG_CMD_NAND */