Merge with /home/stefan/git/u-boot/denx-merge-sr

1 files changed, 94 insertions, 0 deletions

diff --git a/board/sc3/sc3nand.c b/board/sc3/sc3nand.c
new file mode 100644
index 0000000..7daa877
--- /dev/null
+++ b/board/sc3/sc3nand.c
@@ -0,0 +1,94 @@
+/*
+ * (C) Copyright 2007
+ * Heiko Schocher, DENX Software Engineering, hs@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>
+
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+
+#include <nand.h>
+#include <asm/processor.h>
+
+#define readb(addr)	*(volatile u_char *)(addr)
+#define readl(addr)	*(volatile u_long *)(addr)
+#define writeb(d,addr)	*(volatile u_char *)(addr) = (d)
+
+#define SC3_NAND_ALE 29 /* GPIO PIN 3 */
+#define SC3_NAND_CLE 30	/* GPIO PIN 2 */
+#define SC3_NAND_CE  27 /* GPIO PIN 5 */
+
+static void *sc3_io_base;
+static void *sc3_control_base = (void *)0xEF600700;
+
+static void sc3_nand_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+	switch (cmd) {
+	case NAND_CTL_SETCLE:
+		set_bit (SC3_NAND_CLE, sc3_control_base);
+		break;
+	case NAND_CTL_CLRCLE:
+		clear_bit (SC3_NAND_CLE, sc3_control_base);
+		break;
+
+	case NAND_CTL_SETALE:
+		set_bit (SC3_NAND_ALE, sc3_control_base);
+		break;
+	case NAND_CTL_CLRALE:
+		clear_bit (SC3_NAND_ALE, sc3_control_base);
+		break;
+
+	case NAND_CTL_SETNCE:
+		set_bit (SC3_NAND_CE, sc3_control_base);
+		break;
+	case NAND_CTL_CLRNCE:
+		clear_bit (SC3_NAND_CE, sc3_control_base);
+		break;
+	}
+}
+
+static int sc3_nand_dev_ready(struct mtd_info *mtd)
+{
+	if (!(readl(sc3_control_base + 0x1C) & 0x4000))
+		return 0;
+	return 1;
+}
+
+static void sc3_select_chip(struct mtd_info *mtd, int chip)
+{
+	clear_bit (SC3_NAND_CE, sc3_control_base);
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+	nand->eccmode = NAND_ECC_SOFT;
+
+	sc3_io_base = (void *) CFG_NAND_BASE;
+	/* Set address of NAND IO lines (Using Linear Data Access Region) */
+	nand->IO_ADDR_R = (void __iomem *) sc3_io_base;
+	nand->IO_ADDR_W = (void __iomem *) sc3_io_base;
+	/* Reference hardware control function */
+	nand->hwcontrol  = sc3_nand_hwcontrol;
+	nand->dev_ready  = sc3_nand_dev_ready;
+	nand->select_chip = sc3_select_chip;
+	return 0;
+}
+#endif