Initial revision

1 files changed, 195 insertions, 0 deletions

diff --git a/board/eric/eric.c b/board/eric/eric.c
new file mode 100644
index 0000000..17fe6ac
--- /dev/null
+++ b/board/eric/eric.c
@@ -0,0 +1,195 @@
+/*
+ * (C) Copyright 2001
+ * 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
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include "eric.h"
+#include <asm/processor.h>
+
+#define IBM405GP_GPIO0_OR      0xef600700	/* GPIO Output */
+#define IBM405GP_GPIO0_TCR     0xef600704	/* GPIO Three-State Control */
+#define IBM405GP_GPIO0_ODR     0xef600718	/* GPIO Open Drain */
+#define IBM405GP_GPIO0_IR      0xef60071c	/* GPIO Input */
+
+int board_pre_init (void)
+{
+
+   /*-------------------------------------------------------------------------+
+   | Interrupt controller setup for the ERIC 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) FLASH; active low; level sensitive
+   |       IRQ 26 (EXT IRQ 1) PHY ; active low; level sensitive
+   |       IRQ 27 (EXT IRQ 2) HOST FAIL, active low; level sensitive
+   |                          indicates NO Power or HOST RESET active
+   |                          check GPIO7 (HOST RESET#) and GPIO8 (NO Power#)
+   |                          for real IRQ source
+   |       IRQ 28 (EXT IRQ 3) HOST; active high; level sensitive
+   |       IRQ 29 (EXT IRQ 4) PCI INTC#; active low; level sensitive
+   |       IRQ 30 (EXT IRQ 5) PCI INTB#; active low; level sensitive
+   |       IRQ 31 (EXT IRQ 6) PCI INTA#; active low; level sensitive
+   |        -> IRQ6 Pin is NOW GPIO23 and can be activateted by setting
+   |           IBM405GP_GPIO0_TCR Bit 0 = 1 (driving the output as defined in IBM405GP_GPIO0_OR,
+   |           else tristate)
+   | Note for ERIC board:
+   |       An interrupt taken for the HOST (IRQ 28) indicates that
+   |       the HOST wrote a "1" to one of the following locations
+   |       - VGA CRT_GPIO0 (if R1216 is loaded)
+   |       - VGA CRT_GPIO1 (if R1217 is loaded)
+   |
+   +-------------------------------------------------------------------------*/
+
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr (uicer, 0x00000000);	/* disable all ints */
+	mtdcr (uiccr, 0x00000000);	/* set all SMI to be non-critical */
+	mtdcr (uicpr, 0xFFFFFF88);	/* set int polarities; IRQ3 to 1 */
+	mtdcr (uictr, 0x10000000);	/* set int trigger levels, UART0 is EDGE */
+	mtdcr (uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+
+	mtdcr (cntrl0, 0x00002000);	/* set IRQ6 as GPIO23 to generate an interrupt request to the PCP2PCI bridge */
+
+	out32 (IBM405GP_GPIO0_OR, 0x60000000);	/*fixme is SMB_INT high or low active??; IRQ6 is GPIO23 output */
+	out32 (IBM405GP_GPIO0_TCR, 0x7E400000);
+
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	unsigned char *s = getenv ("serial#");
+	unsigned char *e;
+
+	puts ("Board: ");
+
+	if (!s || strncmp (s, "ERIC", 9)) {
+		puts ("### No HW ID - assuming ERIC");
+	} 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)
+{
+#ifndef CONFIG_ERIC
+	int i;
+	unsigned char datain[128];
+	int TotalSize;
+#endif
+
+
+#ifdef CONFIG_ERIC
+	/*
+	 * we have no EEPROM on ERIC
+	 * so let init.S do the init job for SDRAM
+	 * and simply return 32MByte here
+	 */
+	return (CFG_SDRAM_SIZE * 1024 * 1024);
+#else
+
+	/* Read Serial Presence Detect Information */
+	for (i = 0; i < 128; i++)
+		datain[i] = 127;
+	i2c_send (SPD_EEPROM_ADDRESS, 0, 1, datain, 128);
+	printf ("\nReading DIMM...\n");
+#if 0
+	for (i = 0; i < 128; i++) {
+		printf ("%d=0x%x ", i, datain[i]);
+		if (((i + 1) % 10) == 0)
+			printf ("\n");
+	}
+	printf ("\n");
+#endif
+
+  /*****************************/
+	/* Retrieve interesting data */
+  /*****************************/
+	/* size of a SDRAM bank */
+	/* Number of bytes per side / number of banks per side */
+	if (datain[31] == 0x08)
+		TotalSize = 32;
+	else if (datain[31] == 0x10)
+		TotalSize = 64;
+	else {
+		printf ("IIC READ ERROR!!!\n");
+		TotalSize = 32;
+	}
+
+	/* single-sided DIMM or double-sided DIMM? */
+	if (datain[5] != 1) {
+		/* double-sided DIMM => SDRAM banks 0..3 are valid */
+		printf ("double-sided DIMM\n");
+		TotalSize *= 2;
+	}
+	/* else single-sided DIMM => SDRAM bank 0 and bank 2 are valid */
+	else {
+		printf ("single-sided DIMM\n");
+	}
+
+
+	/* return size in Mb unit => *(1024*1024) */
+	return (TotalSize * 1024 * 1024);
+#endif
+}
+
+/* ------------------------------------------------------------------------- */
+
+int testdram (void)
+{
+	/* TODO: XXX XXX XXX */
+	printf ("test: xxx MB - ok\n");
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */