Patch by Reinhard Meyer, 28 Dec 2003:

Add initial support for TOP5200 board

1 files changed, 216 insertions, 0 deletions

diff --git a/board/emk/top5200/top5200.c b/board/emk/top5200/top5200.c
new file mode 100644
index 0000000..536a515
--- /dev/null
+++ b/board/emk/top5200/top5200.c
@@ -0,0 +1,216 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003
+ * Reinhard Meyer, EMK Elektronik GmbH, r.meyer@emk-elektronik.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 <mpc5xxx.h>
+#include <pci.h>
+
+/*****************************************************************************
+ * initialize SDRAM/DDRAM controller.
+ * TBD: get data from I2C EEPROM
+ *****************************************************************************/
+long int initdram (int board_type)
+{
+	ulong dramsize = 0;
+#ifndef CFG_RAMBOOT
+	ulong	t;
+	ulong	tap_del;
+
+	#define	MODE_EN		0x80000000
+	#define	SOFT_PRE	2
+	#define	SOFT_REF	4
+
+	/* configure SDRAM start/end */
+	*(vu_long *)MPC5XXX_SDRAM_CS0CFG = (CFG_SDRAM_BASE & 0xFFF00000) | CFG_DRAM_RAM_SIZE;
+	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;	/* disabled */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = CFG_DRAM_CONFIG1;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = CFG_DRAM_CONFIG2;
+
+	/* unlock mode register */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_PRE;
+#if CFG_DRAM_DDR
+	/* set extended mode register */
+	*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_EMODE;
+#endif
+	/* set mode register */
+	*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_MODE | 0x0400;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_PRE;
+	/* auto refresh */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_REF;
+	/* set mode register */
+	*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_MODE;
+	/* normal operation */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL;
+	/* write default TAP delay */
+	*(vu_long *)MPC5XXX_CDM_PORCFG = CFG_DRAM_TAP_DEL << 24;
+
+#if 0
+	for (tap_del = 0; tap_del < 32; tap_del++) {
+		*(vu_long *)MPC5XXX_CDM_PORCFG = tap_del << 24;
+
+		printf ("\nTAP Delay:%x Filling DRAM...", *(vu_long *)MPC5XXX_CDM_PORCFG);
+		for (t = 0; t < 0x04000000; t+=4)
+			*(vu_long *) t = t;
+		printf ("Checking DRAM...\n");
+		for (t = 0; t < 0x04000000; t+=4) {
+			ulong	rval = *(vu_long *) t;
+			if (rval != t) {
+				printf ("mismatch at %x: ", t);
+				printf (" 1.read %x", rval);
+				printf (" 2.read %x", *(vu_long *) t);
+				printf (" 3.read %x", *(vu_long *) t);
+				break;
+			}
+		}
+	}
+#endif
+#endif /* CFG_RAMBOOT */
+
+	dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
+
+	/* return total ram size */
+	return dramsize;
+}
+
+/*****************************************************************************
+ * print board identification
+ *****************************************************************************/
+int checkboard (void)
+{
+#if defined (CONFIG_EVAL5200)
+	puts ("Board: EMK TOP5200 on EVAL5200\n");
+#else
+#if defined (CONFIG_MINI5200)
+	puts ("Board: EMK TOP5200 on MINI5200\n");
+#else
+	puts ("Board: EMK TOP5200\n");
+#endif
+#endif
+	return 0;
+}
+
+/*****************************************************************************
+ * prepare for FLASH detection
+ *****************************************************************************/
+void flash_preinit(void)
+{
+	/*
+	 * Now, when we are in RAM, enable flash write
+	 * access for detection process.
+	 * Note that CS_BOOT cannot be cleared when
+	 * executing in flash.
+	 */
+	*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
+}
+
+/*****************************************************************************
+ * finalize FLASH setup
+ *****************************************************************************/
+void flash_afterinit(uint bank, ulong start, ulong size)
+{
+	if (bank == 0) { /* adjust mapping */
+		*(vu_long *)MPC5XXX_BOOTCS_START =
+		*(vu_long *)MPC5XXX_CS0_START =	START_REG(start);
+		*(vu_long *)MPC5XXX_BOOTCS_STOP =
+		*(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(start, size);
+	}
+}
+
+/*****************************************************************************
+ * otherinits after RAM is there and we are relocated to RAM
+ * note: though this is an int function, nobody cares for the result!
+ *****************************************************************************/
+int misc_init_r (void)
+{
+	/* read 'factory' part of EEPROM */
+	uchar buf[81];
+	uchar *p;
+	uint length;
+	uint addr;
+	uint len;
+
+	/* get length first */
+	addr = CFG_FACT_OFFSET;
+	if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, 2)) {
+bailout:
+		printf ("cannot read factory configuration\n");
+		printf ("be sure to set ethaddr	yourself!\n");
+		return 0;
+	}
+	length = buf[0] + (buf[1] << 8);
+	addr += 2;
+
+	/* sanity check */
+	if (length < 20 || length > CFG_FACT_SIZE - 2)
+		goto bailout;
+
+	/* read lines */
+	while (length > 0) {
+		/* read one line */
+		len = length > 80 ? 80 : length;
+		if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, len))
+			goto bailout;
+		/* mark end of buffer */
+		buf[len] = 0;
+		/* search end of line */
+		for (p = buf; *p && *p != 0x0a; p++);
+		if (!*p)
+			goto bailout;
+		*p++ = 0;
+		/* advance to next line start */
+		length -= p - buf;
+		addr += p - buf;
+		/*printf ("%s\n", buf); */
+		/* search for our specific entry */
+		if (!strncmp ((char *) buf, "[RLA/lan/Ethernet] ", 19)) {
+			setenv ("ethaddr", buf + 19);
+		} else if (!strncmp ((char *) buf, "[BOARD/SERIAL] ", 15)) {
+			setenv ("serial#", buf + 15);
+		} else if (!strncmp ((char *) buf, "[BOARD/TYPE] ", 13)) {
+			setenv ("board_id", buf + 13);
+		}
+	}
+	return (0);
+}
+
+/*****************************************************************************
+ * initialize the PCI system
+ *****************************************************************************/
+#ifdef	CONFIG_PCI
+static struct pci_controller hose;
+
+extern void pci_mpc5xxx_init(struct pci_controller *);
+
+void pci_init_board(void)
+{
+	pci_mpc5xxx_init(&hose);
+}
+#endif