Initial revision

1 files changed, 138 insertions, 0 deletions

diff --git a/board/walnut405/walnut405.c b/board/walnut405/walnut405.c
new file mode 100644
index 0000000..93c2034
--- /dev/null
+++ b/board/walnut405/walnut405.c
@@ -0,0 +1,138 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@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
+ */
+long int spd_sdram (void);
+
+#include <common.h>
+#include "walnut405.h"
+#include <asm/processor.h>
+
+
+
+int board_pre_init (void)
+{
+   /*-------------------------------------------------------------------------+
+   | Interrupt controller setup for the Walnut board.
+   | Note: IRQ 0-15  405GP internally generated; active high; level sensitive
+   |       IRQ 16    405GP internally generated; active low; level sensitive
+   |       IRQ 17-24 RESERVED
+   |       IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
+   |       IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
+   |       IRQ 27 (EXT IRQ 2) Not Used
+   |       IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
+   |       IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
+   |       IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
+   |       IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
+   | Note for Walnut board:
+   |       An interrupt taken for the FPGA (IRQ 25) indicates that either
+   |       the Mouse, Keyboard, IRDA, or External Expansion caused the
+   |       interrupt. The FPGA must be read to determine which device
+   |       caused the interrupt. The default setting of the FPGA clears
+   |
+   +-------------------------------------------------------------------------*/
+
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr (uicer, 0x00000000);	/* disable all ints */
+	mtdcr (uiccr, 0x00000020);	/* set all but FPGA SMI to be non-critical */
+	mtdcr (uicpr, 0xFFFFFFE0);	/* set int polarities */
+	mtdcr (uictr, 0x10000000);	/* set int trigger levels */
+	mtdcr (uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+
+#define mtebc(reg, data)  mtdcr(ebccfga,reg);mtdcr(ebccfgd,data)
+	/* BAS=0xF00,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits) */
+	mtebc (pb1ap, 0x02815480);
+	mtebc (pb1cr, 0xF0018000);
+
+	/* BAS=0xF01,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits) */
+	mtebc (pb2ap, 0x04815A80);
+	mtebc (pb2cr, 0xF0118000);
+
+	/* BAS=0xF02,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits) */
+	mtebc (pb3ap, 0x01815280);
+	mtebc (pb3cr, 0xF0218000);
+
+	/* BAS=0xF03,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits) */
+	mtebc (pb7ap, 0x01815280);
+	mtebc (pb7cr, 0xF0318000);
+
+	/* set UART1 control to select CTS/RTS */
+#define FPGA_BRDC       0xF0300004
+	*(volatile char *) (FPGA_BRDC) |= 0x1;
+
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	unsigned char *s = getenv ("serial#");
+	unsigned char *e;
+
+	puts ("Board: ");
+
+	if (!s || strncmp (s, "WALNUT405", 9)) {
+		puts ("### No HW ID - assuming WALNUT405");
+	} else {
+		for (e = s; *e; ++e) {
+			if (*e == ' ')
+				break;
+		}
+		for (; s < e; ++s) {
+			putc (*s);
+		}
+	}
+	putc ('\n');
+
+	return (0);
+}
+
+
+/* -------------------------------------------------------------------------
+  initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
+  the necessary info for SDRAM controller configuration
+   ------------------------------------------------------------------------- */
+long int initdram (int board_type)
+{
+	long int ret;
+
+	ret = spd_sdram ();
+	return ret;
+}
+
+/* ------------------------------------------------------------------------- */
+
+int testdram (void)
+{
+	/* TODO: XXX XXX XXX */
+	printf ("test: xxx MB - ok\n");
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */