Migrate esd 405EP boards to new NAND subsystem

This patch prepares the migration from the legacy NAND driver
to U-Boot's new NAND subsystem for esd boards.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/board/esd/common/esd405ep_nand.c b/board/esd/common/esd405ep_nand.c
new file mode 100644
index 0000000..7ac4b83
--- /dev/null
+++ b/board/esd/common/esd405ep_nand.c
@@ -0,0 +1,87 @@
+/*
+ * (C) Copyright 2007
+ * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
+ *
+ * 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>
+
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+#include <asm/io.h>
+#include <nand.h>
+
+/*
+ * hardware specific access to control-lines
+ */
+static void esd405ep_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+{
+	switch(cmd) {
+	case NAND_CTL_SETCLE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CLE);
+		break;
+	case NAND_CTL_CLRCLE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CLE);
+		break;
+	case NAND_CTL_SETALE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_ALE);
+		break;
+	case NAND_CTL_CLRALE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_ALE);
+		break;
+	case NAND_CTL_SETNCE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CE);
+		break;
+	case NAND_CTL_CLRNCE:
+		out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE);
+		break;
+	}
+}
+
+
+/*
+ * read device ready pin
+ */
+static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo)
+{
+	if (in_be32((void *)GPIO0_IR) & CFG_NAND_RDY)
+		return 1;
+	return 0;
+}
+
+
+int board_nand_init(struct nand_chip *nand)
+{
+	/*
+	 * Set NAND-FLASH GPIO signals to defaults
+	 */
+	out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CFG_NAND_CLE | CFG_NAND_ALE));
+	out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE);
+
+	/*
+	 * Initialize nand_chip structure
+	 */
+	nand->hwcontrol = esd405ep_nand_hwcontrol;
+	nand->dev_ready = esd405ep_nand_device_ready;
+	nand->eccmode = NAND_ECC_SOFT;
+	nand->chip_delay = NAND_BIG_DELAY_US;
+	nand->options = NAND_SAMSUNG_LP_OPTIONS;
+	return 0;
+}
+#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */