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Diffstat (limited to 'board/esd/common/esd405ep_nand.c')
-rw-r--r--board/esd/common/esd405ep_nand.c87
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
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+++ 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 defined(CONFIG_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