Patch by Wolter Kamphuis, 05 Dec 2003:

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

1 files changed, 617 insertions, 0 deletions

diff --git a/board/snmc/qs850/flash.c b/board/snmc/qs850/flash.c
new file mode 100644
index 0000000..d4e2cbb
--- /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);
+}