* Update Intel IXP4xx support

- Add IXP4xx NPE ethernet MAC support
- Add support for Intel IXDPG425 board
- Add support for Prodrive PDNB3 board
- Add IRQ support
Patch by Stefan Roese, 23 May 2006

[This patch does not include cpu/ixp/npe/IxNpeMicrocode.c which still
 sufferes from licensing issues. Blame Intel.]

1 files changed, 171 insertions, 0 deletions

diff --git a/board/prodrive/pdnb3/nand.c b/board/prodrive/pdnb3/nand.c
new file mode 100644
index 000000000..1931d64de
--- /dev/null
+++ b/board/prodrive/pdnb3/nand.c
@@ -0,0 +1,171 @@
+/*
+ * (C) Copyright 2006
+ * Stefan Roese, DENX Software Engineering, sr@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>
+
+struct pdnb3_ndfc_regs {
+	uchar cmd;
+	uchar wait;
+	uchar addr;
+	uchar term;
+	uchar data;
+};
+
+static u8 hwctl;
+static struct pdnb3_ndfc_regs *pdnb3_ndfc;
+
+#define readb(addr)	*(volatile u_char *)(addr)
+#define readl(addr)	*(volatile u_long *)(addr)
+#define writeb(d,addr)	*(volatile u_char *)(addr) = (d)
+
+/*
+ * The PDNB3 has a NAND Flash Controller (NDFC) that handles all accesses to
+ * the NAND devices.  The NDFC has command, address and data registers that
+ * when accessed will set up the NAND flash pins appropriately.  We'll use the
+ * hwcontrol function to save the configuration in a global variable.
+ * We can then use this information in the read and write functions to
+ * determine which NDFC register to access.
+ *
+ * There is one NAND devices on the board, a Hynix HY27US08561A (32 MByte).
+ */
+static void pdnb3_nand_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+	switch (cmd) {
+	case NAND_CTL_SETCLE:
+		hwctl |= 0x1;
+		break;
+	case NAND_CTL_CLRCLE:
+		hwctl &= ~0x1;
+		break;
+
+	case NAND_CTL_SETALE:
+		hwctl |= 0x2;
+		break;
+	case NAND_CTL_CLRALE:
+		hwctl &= ~0x2;
+		break;
+
+	case NAND_CTL_SETNCE:
+		break;
+	case NAND_CTL_CLRNCE:
+		writeb(0x00, &(pdnb3_ndfc->term));
+		break;
+	}
+}
+
+static void pdnb3_nand_write_byte(struct mtd_info *mtd, u_char byte)
+{
+	if (hwctl & 0x1)
+		writeb(byte, &(pdnb3_ndfc->cmd));
+	else if (hwctl & 0x2)
+		writeb(byte, &(pdnb3_ndfc->addr));
+	else
+		writeb(byte, &(pdnb3_ndfc->data));
+}
+
+static u_char pdnb3_nand_read_byte(struct mtd_info *mtd)
+{
+	return readb(&(pdnb3_ndfc->data));
+}
+
+static void pdnb3_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++) {
+		if (hwctl & 0x1)
+			writeb(buf[i], &(pdnb3_ndfc->cmd));
+		else if (hwctl & 0x2)
+			writeb(buf[i], &(pdnb3_ndfc->addr));
+		else
+			writeb(buf[i], &(pdnb3_ndfc->data));
+	}
+}
+
+static void pdnb3_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+{
+	int i;
+
+	if (len % 4) {
+		for (i = 0; i < len; i++)
+			buf[i] = readb(&(pdnb3_ndfc->data));
+	} else {
+		ulong *ptr = (ulong *)buf;
+		int count = len >> 2;
+
+		for (i = 0; i < count; i++)
+			*ptr++ = readl(&(pdnb3_ndfc->data));
+	}
+}
+
+static int pdnb3_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++)
+		if (buf[i] != readb(&(pdnb3_ndfc->data)))
+			return i;
+
+	return 0;
+}
+
+static int pdnb3_nand_dev_ready(struct mtd_info *mtd)
+{
+	volatile u_char val;
+
+	/*
+	 * Blocking read to wait for NAND to be ready
+	 */
+	val = readb(&(pdnb3_ndfc->wait));
+
+	/*
+	 * Return always true
+	 */
+	return 1;
+}
+
+void board_nand_init(struct nand_chip *nand)
+{
+	pdnb3_ndfc = (struct pdnb3_ndfc_regs *)CFG_NAND_BASE;
+
+	nand->eccmode = NAND_ECC_SOFT;
+
+	/* Set address of NAND IO lines (Using Linear Data Access Region) */
+	nand->IO_ADDR_R = (void __iomem *) ((ulong) pdnb3_ndfc + 0x4);
+	nand->IO_ADDR_W = (void __iomem *) ((ulong) pdnb3_ndfc + 0x4);
+	/* Reference hardware control function */
+	nand->hwcontrol  = pdnb3_nand_hwcontrol;
+	/* Set command delay time */
+	nand->hwcontrol  = pdnb3_nand_hwcontrol;
+	nand->write_byte = pdnb3_nand_write_byte;
+	nand->read_byte  = pdnb3_nand_read_byte;
+	nand->write_buf  = pdnb3_nand_write_buf;
+	nand->read_buf   = pdnb3_nand_read_buf;
+	nand->verify_buf = pdnb3_nand_verify_buf;
+	nand->dev_ready  = pdnb3_nand_dev_ready;
+}
+#endif