Patch by Wolter Kamphuis, 05 Dec 2003:

Add support for SNMC's QS850/QS823/QS860T boards

5 files changed, 1080 insertions, 0 deletions

diff --git a/board/snmc/qs850/Makefile b/board/snmc/qs850/Makefile
new file mode 100644
index 0000000000..e5d8446313
--- /dev/null
+++ b/board/snmc/qs850/Makefile
@@ -0,0 +1,40 @@
+#
+# (C) Copyright 2000-2003
+# 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 $(TOPDIR)/config.mk
+
+LIB	= lib$(BOARD).a
+
+OBJS	= $(BOARD).o flash.o
+
+$(LIB):	.depend $(OBJS)
+	$(AR) crv $@ $(OBJS)
+
+#########################################################################
+
+.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/board/snmc/qs850/config.mk b/board/snmc/qs850/config.mk
new file mode 100644
index 0000000000..905f692698
--- /dev/null
+++ b/board/snmc/qs850/config.mk
@@ -0,0 +1,29 @@
+#
+# (C) Copyright 2002-2003
+# Simple Network Magic Corporation, dnevil@snmc.com
+#
+# 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
+#
+
+#
+# QS850
+# Start address of Bootloader in Flash
+#
+
+TEXT_BASE = 0xFFF00000
diff --git a/board/snmc/qs850/flash.c b/board/snmc/qs850/flash.c
new file mode 100644
index 0000000000..d4e2cbb2c8
--- /dev/null
+++ b/board/snmc/qs850/flash.c
@@ -0,0 +1,617 @@
+/*
+ * (C) Copyright 2003
+ * MuLogic B.V.
+ *
+ * (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 <ppc4xx.h>
+#include <asm/u-boot.h>
+#include <asm/processor.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+
+#define FLASH_WORD_SIZE unsigned long
+#define FLASH_ID_MASK 0xFFFFFFFF
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+/* stolen from esteem192e/flash.c */
+ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
+
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	unsigned long size_b0, size_b1;
+	int i;
+	uint pbcr;
+	unsigned long base_b0, base_b1;
+	volatile FLASH_WORD_SIZE* flash_base;
+
+	/* Init: no FLASHes known */
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	/* Static FLASH Bank configuration here */
+	/* Test for 8M Flash first */
+	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM);
+	flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM);
+	size_b0 = flash_get_size(flash_base, &flash_info[0]);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+		size_b0, size_b0<<20);
+		return 0;
+	}
+
+	if (size_b0 < 8*1024*1024) {
+		/* Not quite 8M, try 4M Flash base address */
+		debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM);
+		flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM);
+		size_b0 = flash_get_size(flash_base, &flash_info[0]);
+	}
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+		size_b0, size_b0<<20);
+		return 0;
+	}
+
+	/* Only one bank */
+	if (CFG_MAX_FLASH_BANKS == 1) {
+		/* Setup offsets */
+		flash_get_offsets ((ulong)flash_base, &flash_info[0]);
+
+		/* Monitor protection ON by default */
+		(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+			CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
+		size_b1 = 0 ;
+		flash_info[0].size = size_b0;
+		return(size_b0);
+	}
+
+	/* We have 2 banks */
+	size_b1 = flash_get_size(flash_base, &flash_info[1]);
+
+	/* Re-do sizing to get full correct info */
+	if (size_b1) {
+		mtdcr(ebccfga, pb0cr);
+		pbcr = mfdcr(ebccfgd);
+		mtdcr(ebccfga, pb0cr);
+		base_b1 = -size_b1;
+		pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
+		mtdcr(ebccfgd, pbcr);
+	}
+
+	if (size_b0) {
+		mtdcr(ebccfga, pb1cr);
+		pbcr = mfdcr(ebccfgd);
+		mtdcr(ebccfga, pb1cr);
+		base_b0 = base_b1 - size_b0;
+		pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
+		mtdcr(ebccfgd, pbcr);
+	}
+
+	size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
+	flash_get_offsets (base_b0, &flash_info[0]);
+
+	/* monitor protection ON by default */
+	(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+		CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
+
+	if (size_b1) {
+		/* Re-do sizing to get full correct info */
+		size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
+		flash_get_offsets (base_b1, &flash_info[1]);
+
+		/* monitor protection ON by default */
+		(void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CFG_MONITOR_LEN,
+			base_b1+size_b1-1, &flash_info[1]);
+
+		/* monitor protection OFF by default (one is enough) */
+		(void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CFG_MONITOR_LEN,
+			base_b0+size_b0-1, &flash_info[0]);
+	} else {
+		flash_info[1].flash_id = FLASH_UNKNOWN;
+		flash_info[1].sector_count = -1;
+	}
+
+	flash_info[0].size = size_b0;
+	flash_info[1].size = size_b1;
+	return (size_b0 + size_b1);
+}
+
+
+
+/*-----------------------------------------------------------------------
+ This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
+ */
+
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+	long large_sect_size;
+	long small_sect_size;
+
+	/* set up sector start adress table */
+	large_sect_size = info->size / (info->sector_count - 8 + 1);
+	small_sect_size = large_sect_size / 8;
+
+	if (info->flash_id & FLASH_BTYPE) {
+
+		/* set sector offsets for bottom boot block type */
+		for (i = 0; i < 7; i++) {
+			info->start[i] = base;
+			base += small_sect_size;
+		}
+
+		for (; i < info->sector_count; i++) {
+			info->start[i] = base;
+			base += large_sect_size;
+		}
+	}
+	else
+	{
+		/* set sector offsets for top boot block type */
+		for (i = 0; i < (info->sector_count - 8); i++) {
+			info->start[i] = base;
+			base += large_sect_size;
+		}
+
+		for (; i < info->sector_count; i++) {
+			info->start[i] = base;
+			base += small_sect_size;
+		}
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info  (flash_info_t *info)
+{
+	int i;
+	uchar *boottype;
+	uchar botboot[]=", bottom boot sect)\n";
+	uchar topboot[]=", top boot sector)\n";
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+		case FLASH_MAN_AMD:
+			printf ("AMD ");
+			break;
+		case FLASH_MAN_FUJ:
+			printf ("FUJITSU ");
+			break;
+		case FLASH_MAN_SST:
+			printf ("SST ");
+			break;
+		case FLASH_MAN_STM:
+			printf ("STM ");
+			break;
+		case FLASH_MAN_INTEL:
+			printf ("INTEL ");
+			break;
+		default:
+			printf ("Unknown Vendor ");
+			break;
+	}
+
+	if (info->flash_id & 0x0001 ) {
+		boottype = botboot;
+	} else {
+		boottype = topboot;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case FLASH_AM160B:
+			printf ("AM29LV160B (16 Mbit%s",boottype);
+			break;
+		case FLASH_AM160T:
+			printf ("AM29LV160T (16 Mbit%s",boottype);
+			break;
+		case FLASH_AMDL163T:
+			printf ("AM29DL163T (16 Mbit%s",boottype);
+			break;
+		case FLASH_AMDL163B:
+			printf ("AM29DL163B (16 Mbit%s",boottype);
+			break;
+		case FLASH_AM320B:
+			printf ("AM29LV320B (32 Mbit%s",boottype);
+			break;
+		case FLASH_AM320T:
+			printf ("AM29LV320T (32 Mbit%s",boottype);
+			break;
+		case FLASH_AMDL323T:
+			printf ("AM29DL323T (32 Mbit%s",boottype);
+			break;
+		case FLASH_AMDL323B:
+			printf ("AM29DL323B (32 Mbit%s",boottype);
+			break;
+		case FLASH_AMDL322T:
+			printf ("AM29DL322T (32 Mbit%s",boottype);
+			break;
+		default:
+			printf ("Unknown Chip Type\n");
+			break;
+	}
+
+	printf ("  Size: %ld MB in %d Sectors\n",
+	info->size >> 20, info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+	for (i=0; i<info->sector_count; ++i) {
+		if ((i % 5) == 0)
+			printf ("\n   ");
+		printf (" %08lX%s", info->start[i],
+			info->protect[i] ? " (RO)" : "     ");
+	}
+	printf ("\n");
+	return;
+}
+
+
+/*-----------------------------------------------------------------------
+ * The following code cannot be run from FLASH!
+ */
+ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
+{
+	short i;
+	ulong base = (ulong)addr;
+	FLASH_WORD_SIZE value;
+
+	/* Write auto select command: read Manufacturer ID */
+
+	/*
+	 * Note: if it is an AMD flash and the word at addr[0000]
+	 * is 0x00890089 this routine will think it is an Intel
+	 * flash device and may(most likely) cause trouble.
+	 */
+
+	addr[0x0000] = 0x00900090;
+	if(addr[0x0000] != 0x00890089){
+		addr[0x0555] = 0x00AA00AA;
+		addr[0x02AA] = 0x00550055;
+		addr[0x0555] = 0x00900090;
+	}
+	value = addr[0];
+
+	switch (value) {
+		case (AMD_MANUFACT & FLASH_ID_MASK):
+			info->flash_id = FLASH_MAN_AMD;
+			break;
+		case (FUJ_MANUFACT & FLASH_ID_MASK):
+			info->flash_id = FLASH_MAN_FUJ;
+			break;
+		case (STM_MANUFACT & FLASH_ID_MASK):
+			info->flash_id = FLASH_MAN_STM;
+			break;
+		case (SST_MANUFACT & FLASH_ID_MASK):
+			info->flash_id = FLASH_MAN_SST;
+			break;
+		case (INTEL_MANUFACT & FLASH_ID_MASK):
+			info->flash_id = FLASH_MAN_INTEL;
+			break;
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			info->sector_count = 0;
+			info->size = 0;
+			return (0); /* no or unknown flash */
+	}
+
+	value = addr[1]; /* device ID */
+
+	switch (value) {
+		case (AMD_ID_LV160T & FLASH_ID_MASK):
+			info->flash_id += FLASH_AM160T;
+			info->sector_count = 35;
+			info->size = 0x00400000;
+			break; /* => 4 MB */
+
+		case (AMD_ID_LV160B & FLASH_ID_MASK):
+			info->flash_id += FLASH_AM160B;
+			info->sector_count = 35;
+			info->size = 0x00400000;
+			break; /* => 4 MB */
+
+		case (AMD_ID_DL163T & FLASH_ID_MASK):
+			info->flash_id += FLASH_AMDL163T;
+			info->sector_count = 39;
+			info->size = 0x00400000;
+			break; /* => 4 MB */
+
+		case (AMD_ID_DL163B & FLASH_ID_MASK):
+			info->flash_id += FLASH_AMDL163B;
+			info->sector_count = 39;
+			info->size = 0x00400000;
+			break; /* => 4 MB */
+
+		case (AMD_ID_DL323T & FLASH_ID_MASK):
+			info->flash_id += FLASH_AMDL323T;
+			info->sector_count = 71;
+			info->size = 0x00800000;
+			break; /* => 8 MB */
+
+		case (AMD_ID_DL323B & FLASH_ID_MASK):
+			info->flash_id += FLASH_AMDL323B;
+			info->sector_count = 71;
+			info->size = 0x00800000;
+			break; /* => 8 MB */
+
+		case (AMD_ID_DL322T & FLASH_ID_MASK):
+			info->flash_id += FLASH_AMDL322T;
+			info->sector_count = 71;
+			info->size = 0x00800000;
+			break; /* => 8 MB */
+
+		default:
+			/* FIXME*/
+			info->flash_id = FLASH_UNKNOWN;
+			return (0); /* => no or unknown flash */
+	}
+
+	flash_get_offsets(base, info);
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+		/* D0 = 1 if protected */
+		addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
+		info->protect[i] = addr[2] & 1;
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		addr = (volatile FLASH_WORD_SIZE *)info->start[0];
+		*addr = (0x00FF00FF & FLASH_ID_MASK);	/* reset bank */
+	}
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
+	int flag, prot, sect, l_sect;
+	ulong start, now, last;
+	int rcode = 0;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		if (info->flash_id == FLASH_UNKNOWN) {
+			printf ("- missing\n");
+		} else {
+			printf ("- no sectors to erase\n");
+		}
+		return 1;
+	}
+
+	if ((info->flash_id == FLASH_UNKNOWN) ||
+		(info->flash_id > FLASH_AMD_COMP) ) {
+		printf ("Can't erase unknown flash type - aborted\n");
+		return 1;
+	}
+
+	prot = 0;
+	for (sect=s_first; sect<=s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+
+	if (prot) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+	addr[0x0555] = 0x00AA00AA;
+	addr[0x02AA] = 0x00550055;
+	addr[0x0555] = 0x00800080;
+	addr[0x0555] = 0x00AA00AA;
+	addr[0x02AA] = 0x00550055;
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) { /* not protected */
+			addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
+			addr[0] = (0x00300030 & FLASH_ID_MASK);
+			l_sect = sect;
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay (1000);
+
+	/*
+	 * We wait for the last triggered sector
+	 */
+	if (l_sect < 0)
+		goto DONE;
+
+	start = get_timer (0);
+	last  = start;
+	addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
+	while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
+			(0x00800080&FLASH_ID_MASK)  )
+	{
+		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+			printf ("Timeout\n");
+			return 1;
+		}
+		/* show that we're waiting */
+		if ((now - last) > 1000) { /* every second */
+			serial_putc ('.');
+			last = now;
+		}
+	}
+
+DONE:
+	/* reset to read mode */
+	addr = (volatile FLASH_WORD_SIZE *)info->start[0];
+	addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
+
+	printf (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int l;
+	int i, rc;
+
+	wp = (addr & ~3); /* get lower word aligned address */
+
+	/*
+	 * handle unaligned start bytes
+	 */
+	if ((l = addr - wp) != 0) {
+		data = 0;
+		for (i=0, cp=wp; i<l; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+		for (; i<4 && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<4; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 4;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 4) {
+		data = 0;
+		for (i=0; i<4; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp  += 4;
+		cnt -= 4;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i<4; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+	}
+
+	return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+	vu_long *addr = (vu_long*)(info->start[0]);
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_long *)dest) & data) != data) {
+		return (2);
+	}
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	/* AMD stuff */
+	addr[0x0555] = 0x00AA00AA;
+	addr[0x02AA] = 0x00550055;
+	addr[0x0555] = 0x00A000A0;
+
+	*((vu_long *)dest) = data;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* data polling for D7 */
+	start = get_timer(0);
+
+	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			return (1);
+		}
+	}
+
+	return (0);
+}
diff --git a/board/snmc/qs850/qs850.c b/board/snmc/qs850/qs850.c
new file mode 100644
index 0000000000..7448eb112e
--- /dev/null
+++ b/board/snmc/qs850/qs850.c
@@ -0,0 +1,253 @@
+/*
+ * (C) Copyright 2003
+ * MuLogic B.V.
+ *
+ * (C) Copyright 2002
+ * Simple Network Magic Corporation, dnevil@snmc.com
+ *
+ * (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
+ */
+
+#include <common.h>
+#include <asm/u-boot.h>
+#include <commproc.h>
+#include "mpc8xx.h"
+
+/* ------------------------------------------------------------------------- */
+
+static long  int dram_size (long int, long int *, long int);
+
+/* ------------------------------------------------------------------------- */
+
+const uint sdram_table[] =
+{
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x0f07cc04,  0x00adcc04,  0x00a74c00,  0x00bfcc04,
+	0x1fffcc05,  0xffffcc05,  0xffffcc05,  0xffffcc05,
+	/*
+	 * Burst Read. (Offset 8 in UPMA RAM)
+	 */
+	0x0ff7fc04,  0x0ffffc04,  0x00bdfc04,  0x00fffc00,
+	0x00fffc00,  0x00fffc00,  0x0ff77c00,  0x1ffffc05,
+	0x1ffffc05,  0x1ffffc05,  0x1ffffc05,  0x1ffffc05,
+	0x1ffffc05,  0x1ffffc05,  0x1ffffc05,  0x1ffffc05,
+	/*
+	 * Single Write. (Offset 18 in UPMA RAM)
+	 */
+	0x0f07cc04,  0x0fafcc00,  0x01ad0c04,  0x1ff74c07,
+	0xffffcc05,  0xffffcc05,  0xffffcc05,  0xffffcc05,
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x0ff7fc04,  0x0ffffc00,  0x00bd7c00,  0x00fffc00,
+	0x00fffc00,  0x00fffc00,  0x0ffffc04,  0x0ff77c04,
+	0x1ffffc05,  0x1ffffc05,  0x1ffffc05,  0x1ffffc05,
+	0x1ffffc05,  0x1ffffc05,  0x1ffffc05,  0x1ffffc05,
+	/*
+	 * Refresh  (Offset 30 in UPMA RAM)
+	 */
+	0xffffcc04,  0x1ff5cc84,  0xffffcc04,  0xffffcc04,
+	0xffffcc84,  0xffffcc05,  0xffffcc04,  0xffffcc04,
+	0xffffcc04,  0xffffcc04,  0xffffcc04,  0xffffcc04,
+	/*
+	 * Exception. (Offset 3c in UPMA RAM)
+	 */
+	0x1ff74c04,  0xffffcc07,  0xffffaa34,  0x1fb54a37
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ *
+ * Test ID string (QS850, QS823, ...)
+ *
+ * Always return 1
+ */
+
+int checkboard (void)
+{
+	unsigned char *s, *e;
+	unsigned char buf[64];
+	int i;
+
+	i = getenv_r("serial#", buf, sizeof(buf));
+	s = (i>0) ? buf : NULL;
+
+#ifdef CONFIG_QS850
+	if (!s || strncmp(s, "QS850", 5)) {
+		puts ("### No HW ID - assuming QS850");
+#endif
+#ifdef CONFIG_QS823
+	if (!s || strncmp(s, "QS823", 5)) {
+		puts ("### No HW ID - assuming QS823");
+#endif
+	} else {
+		for (e=s; *e; ++e) {
+		if (*e == ' ')
+		break;
+	}
+
+	for ( ; s<e; ++s) {
+		putc (*s);
+		}
+	}
+	putc ('\n');
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */
+/* SDRAM Mode Register Definitions */
+
+/* Set SDRAM Burst Length to 4 (010) */
+/* See Motorola MPC850 User Manual, Page 13-14 */
+#define SDRAM_BURST_LENGTH      (2)
+
+/* Set Wrap Type to Sequential (0) */
+/* See Motorola MPC850 User Manual, Page 13-14 */
+#define SDRAM_WRAP_TYPE         (0 << 3)
+
+/* Set /CAS Latentcy to 2 clocks */
+#define SDRAM_CAS_LATENTCY      (2 << 4)
+
+/* The Mode Register value must be shifted left by 2, since it is */
+/* placed on the address bus, and the 2 LSBs are ignored for 32-bit accesses */
+#define SDRAM_MODE_REG  ((SDRAM_BURST_LENGTH|SDRAM_WRAP_TYPE|SDRAM_CAS_LATENTCY) << 2)
+
+#define UPMA_RUN(loops,index)   (0x80002000 + (loops<<8) + index)
+
+/* Please note a value of zero = 16 loops */
+#define REFRESH_INIT_LOOPS (0)
+
+
+long int initdram (int board_type)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	long int size;
+
+	upmconfig(UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
+
+	/*
+	* Prescaler for refresh
+	*/
+	memctl->memc_mptpr = CFG_MPTPR;
+
+	/*
+	* Map controller bank 1 to the SDRAM address
+	*/
+	memctl->memc_or1 = CFG_OR1;
+	memctl->memc_br1 = CFG_BR1;
+	udelay(1000);
+
+	/* perform SDRAM initialization sequence */
+	memctl->memc_mamr = CFG_16M_MAMR;
+	udelay(100);
+
+	/* Program the SDRAM's Mode Register */
+	memctl->memc_mar  = SDRAM_MODE_REG;
+
+	/* Run the Prechard Pattern at 0x3C */
+	memctl->memc_mcr  = UPMA_RUN(1,0x3c);
+	udelay(1);
+
+	/* Run the Refresh program residing at MAD index 0x30 */
+	/* This contains the CBR Refresh command with a loop */
+	/* The SDRAM must be refreshed at least 2 times */
+	/* Please note a value of zero = 16 loops */
+	memctl->memc_mcr  = UPMA_RUN(REFRESH_INIT_LOOPS,0x30);
+	udelay(1);
+
+	/* Run the Exception program residing at MAD index 0x3E */
+	/* This contains the Write Mode Register command */
+	/* The Write Mode Register command uses the value written to MAR */
+	memctl->memc_mcr  = UPMA_RUN(1,0x3e);
+
+	udelay (1000);
+
+	/*
+	* Check for 32M SDRAM Memory Size
+	*/
+	size = dram_size(CFG_32M_MAMR|MAMR_PTAE,
+	(ulong *)SDRAM_BASE, SDRAM_32M_MAX_SIZE);
+	udelay (1000);
+
+	/*
+	* Check for 16M SDRAM Memory Size
+	*/
+	if (size != SDRAM_32M_MAX_SIZE) {
+	size = dram_size(CFG_16M_MAMR|MAMR_PTAE,
+	(ulong *)SDRAM_BASE, SDRAM_16M_MAX_SIZE);
+	udelay (1000);
+	}
+
+	udelay(10000);
+	return (size);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check memory range for valid RAM. A simple memory test determines
+ * the actually available RAM size between addresses `base' and
+ * `base + maxsize'. Some (not all) hardware errors are detected:
+ * - short between address lines
+ * - short between data lines
+ */
+
+static long int dram_size (long int mamr_value, long int *base, long int maxsize)
+{
+	volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	volatile long int *addr;
+	long int cnt, val;
+
+	memctl->memc_mamr = mamr_value;
+
+	for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
+		addr = base + cnt; /* pointer arith! */
+		*addr = ~cnt;
+	}
+
+	/* write 0 to base address */
+	addr = base;
+	*addr = 0;
+
+	/* check at base address */
+	if ((val = *addr) != 0) {
+		return (0);
+	}
+
+	for (cnt = 1; ; cnt <<= 1) {
+		addr = base + cnt; /* pointer arith! */
+		val = *addr;
+
+		if (val != (~cnt)) {
+			return (cnt * sizeof(long));
+		}
+	}
+	/* NOTREACHED */
+}
diff --git a/board/snmc/qs850/u-boot.lds b/board/snmc/qs850/u-boot.lds
new file mode 100644
index 0000000000..61e10849e5
--- /dev/null
+++ b/board/snmc/qs850/u-boot.lds
@@ -0,0 +1,141 @@
+/*
+ * (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
+ */
+
+OUTPUT_ARCH(powerpc)
+SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/usr/local/powerpc-any-elf/lib);
+/* Do we need any of these for elf?
+   __DYNAMIC = 0;    */
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = + SIZEOF_HEADERS;
+  .interp : { *(.interp) }
+  .hash          : { *(.hash)		}
+  .dynsym        : { *(.dynsym)		}
+  .dynstr        : { *(.dynstr)		}
+  .rel.text      : { *(.rel.text)	}
+  .rela.text     : { *(.rela.text) 	}
+  .rel.data      : { *(.rel.data)	}
+  .rela.data     : { *(.rela.data) 	}
+  .rel.rodata    : { *(.rel.rodata) 	}
+  .rela.rodata   : { *(.rela.rodata) 	}
+  .rel.got       : { *(.rel.got)	}
+  .rela.got      : { *(.rela.got)	}
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.bss       : { *(.rel.bss)	}
+  .rela.bss      : { *(.rela.bss)	}
+  .rel.plt       : { *(.rel.plt)	}
+  .rela.plt      : { *(.rela.plt)	}
+  .init          : { *(.init)		}
+  .plt : { *(.plt) }
+  .text      :
+  {
+    /* WARNING - the following is hand-optimized to fit within	*/
+    /* the sector layout of our flash chips!	XXX FIXME XXX	*/
+
+	cpu/mpc8xx/start.o		(.text)
+	cpu/mpc8xx/traps.o		(.text)
+	common/dlmalloc.o		(.text)
+	lib_ppc/ppcstring.o		(.text)
+	lib_generic/vsprintf.o	(.text)
+	lib_generic/crc32.o		(.text)
+	lib_generic/zlib.o		(.text)
+	lib_ppc/cache.o		(.text)
+	lib_ppc/time.o		(.text)
+
+    . = DEFINED(env_offset) ? env_offset : .;
+	common/environment.o	(.ppcenv)
+
+    *(.text)
+    *(.fixup)
+    *(.got1)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(.rodata)
+    *(.rodata1)
+    *(.rodata.str1.4)
+  }
+  .fini      : { *(.fini)    } =0
+  .ctors     : { *(.ctors)   }
+  .dtors     : { *(.dtors)   }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+  .reloc   :
+  {
+    *(.got)
+    _GOT2_TABLE_ = .;
+    *(.got2)
+    _FIXUP_TABLE_ = .;
+    *(.fixup)
+  }
+  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+  __fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+  .data    :
+  {
+    *(.data)
+    *(.data1)
+    *(.sdata)
+    *(.sdata2)
+    *(.dynamic)
+    CONSTRUCTORS
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  __u_boot_cmd_start = .;
+  .u_boot_cmd : { *(.u_boot_cmd) }
+  __u_boot_cmd_end = .;
+
+
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  . = ALIGN(256);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __init_end = .;
+
+  __bss_start = .;
+  .bss       :
+  {
+   *(.sbss) *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+  }
+  _end = . ;
+  PROVIDE (end = .);
+}