Merge with /home/stefan/git/u-boot/denx

1 files changed, 786 insertions, 0 deletions

diff --git a/board/tqm5200/cam5200_flash.c b/board/tqm5200/cam5200_flash.c
new file mode 100644
index 0000000..1a40633
--- /dev/null
+++ b/board/tqm5200/cam5200_flash.c
@@ -0,0 +1,786 @@
+/*
+ * (C) Copyright 2006
+ * 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 <mpc5xxx.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_CAM5200
+
+#if 0
+#define DEBUGF(x...) printf(x)
+#else
+#define DEBUGF(x...)
+#endif
+
+#define swap16(x) __swab16(x)
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips */
+
+/*
+ * CAM5200 is a TQM5200B based board. Additionally it also features
+ * a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
+ * Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
+ * 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
+ * access to flash chip slightly more complicated as additional byte
+ * swapping is necessary within each 16 bit wide flash 'word'.
+ *
+ * This driver's task is to handle both flash devices: 32 bit TQM5200B
+ * flash chip and 16 bit NIOS cpu flash chip. In the below
+ * flash_addr_table table we use least significant address bit to mark
+ * 16 bit flash bank and two sets of routines *_32 and *_16 to handle
+ * specifics of both flashes.
+ */
+static unsigned long flash_addr_table[][CFG_MAX_FLASH_BANKS] = {
+	{CFG_BOOTCS_START, CFG_CS5_START | 1}
+};
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static int write_word(flash_info_t * info, ulong dest, ulong data);
+#ifdef CFG_FLASH_2ND_16BIT_DEV
+static int write_word_32(flash_info_t * info, ulong dest, ulong data);
+static int write_word_16(flash_info_t * info, ulong dest, ulong data);
+static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
+static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
+static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
+static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
+#endif
+
+void flash_print_info(flash_info_t * info)
+{
+	int i, k;
+	int size, erased;
+	volatile unsigned long *flash;
+
+	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;
+		default:
+			printf("Unknown Vendor ");
+			break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case FLASH_S29GL128N:
+			printf ("S29GL128N (256 Mbit, uniform sector size)\n");
+			break;
+		case FLASH_AM320B:
+			printf ("29LV320B (32 Mbit, bottom boot sect)\n");
+			break;
+		case FLASH_AM320T:
+			printf ("29LV320T (32 Mbit, top boot sect)\n");
+			break;
+		default:
+			printf("Unknown Chip Type\n");
+			break;
+	}
+
+	printf("  Size: %ld KB in %d Sectors\n",
+			info->size >> 10, info->sector_count);
+
+	printf("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; ++i) {
+		/*
+		 * Check if whole sector is erased
+		 */
+		if (i != (info->sector_count - 1))
+			size = info->start[i + 1] - info->start[i];
+		else
+			size = info->start[0] + info->size - info->start[i];
+
+		erased = 1;
+		flash = (volatile unsigned long *)info->start[i];
+		size = size >> 2;	/* divide by 4 for longword access */
+
+		for (k = 0; k < size; k++) {
+			if (*flash++ != 0xffffffff) {
+				erased = 0;
+				break;
+			}
+		}
+
+		if ((i % 5) == 0)
+			printf("\n   ");
+
+		printf(" %08lX%s%s", info->start[i],
+				erased ? " E" : "  ",
+				info->protect[i] ? "RO " : "   ");
+	}
+	printf("\n");
+	return;
+}
+
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+#ifdef CFG_FLASH_2ND_16BIT_DEV
+static ulong flash_get_size(vu_long * addr, flash_info_t * info)
+{
+
+	DEBUGF("get_size: FLASH ADDR %08lx\n", addr);
+
+	/* bit 0 used for big flash marking */
+	if ((ulong)addr & 0x1)
+		return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
+	else
+		return flash_get_size_32(addr, info);
+}
+
+static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
+#else
+static ulong flash_get_size(vu_long * addr, flash_info_t * info)
+#endif
+{
+	short i;
+	CFG_FLASH_WORD_SIZE value;
+	ulong base = (ulong) addr;
+	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
+
+	DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);
+
+	/* Write auto select command: read Manufacturer ID */
+	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
+	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
+	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
+	udelay(1000);
+
+	value = addr2[0];
+	DEBUGF("FLASH MANUFACT: %x\n", value);
+
+	switch (value) {
+		case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
+			info->flash_id = FLASH_MAN_AMD;
+			break;
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			info->sector_count = 0;
+			info->size = 0;
+			return (0);	/* no or unknown flash  */
+	}
+
+	value = addr2[1];	/* device ID            */
+	DEBUGF("\nFLASH DEVICEID: %x\n", value);
+
+	switch (value) {
+		case AMD_ID_MIRROR:
+			DEBUGF("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
+					addr[14], addr[15]);
+			switch(addr[14]) {
+				case AMD_ID_GL128N_2:
+					if (addr[15] != AMD_ID_GL128N_3) {
+						DEBUGF("Chip: S29GL128N -> unknown\n");
+						info->flash_id = FLASH_UNKNOWN;
+					} else {
+						DEBUGF("Chip: S29GL128N\n");
+						info->flash_id += FLASH_S29GL128N;
+						info->sector_count = 128;
+						info->size = 0x02000000;
+					}
+					break;
+				default:
+					info->flash_id = FLASH_UNKNOWN;
+					return(0);
+			}
+			break;
+
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			return (0);	/* => no or unknown flash */
+	}
+
+	/* set up sector start address table */
+	for (i = 0; i < info->sector_count; i++)
+		info->start[i] = base + (i * 0x00040000);
+
+	/* 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 */
+		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
+
+		info->protect[i] = addr2[2] & 1;
+	}
+
+	/* issue bank reset to return to read mode */
+	addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
+
+	return (info->size);
+}
+
+static int wait_for_DQ7_32(flash_info_t * info, int sect)
+{
+	ulong start, now, last;
+	volatile CFG_FLASH_WORD_SIZE *addr =
+		(CFG_FLASH_WORD_SIZE *) (info->start[sect]);
+
+	start = get_timer(0);
+	last = start;
+	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
+			(CFG_FLASH_WORD_SIZE) 0x00800080) {
+		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 */
+			putc('.');
+			last = now;
+		}
+	}
+	return 0;
+}
+
+#ifdef CFG_FLASH_2ND_16BIT_DEV
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
+		return flash_erase_16(info, s_first, s_last);
+	} else {
+		return flash_erase_32(info, s_first, s_last);
+	}
+}
+
+static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
+#else
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+#endif
+{
+	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
+	volatile CFG_FLASH_WORD_SIZE *addr2;
+	int flag, prot, sect, l_sect;
+
+	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) {
+		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!", prot);
+
+	printf("\n");
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
+
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
+			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
+			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
+			addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;	/* sector erase */
+
+			l_sect = sect;
+			/*
+			 * Wait for each sector to complete, it's more
+			 * reliable.  According to AMD Spec, you must
+			 * issue all erase commands within a specified
+			 * timeout.  This has been seen to fail, especially
+			 * if printf()s are included (for debug)!!
+			 */
+			wait_for_DQ7_32(info, sect);
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay(1000);
+
+	/* reset to read mode */
+	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
+	addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;	/* reset bank */
+
+	printf(" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 i, l, 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));
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+#ifdef CFG_FLASH_2ND_16BIT_DEV
+static int write_word(flash_info_t * info, ulong dest, ulong data)
+{
+	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
+		return write_word_16(info, dest, data);
+	} else {
+		return write_word_32(info, dest, data);
+	}
+}
+
+static int write_word_32(flash_info_t * info, ulong dest, ulong data)
+#else
+static int write_word(flash_info_t * info, ulong dest, ulong data)
+#endif
+{
+	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
+	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
+	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
+	ulong start;
+	int i, flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_long *)dest) & data) != data)
+		return (2);
+
+	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
+		addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
+		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
+
+		dest2[i] = data2[i];
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* data polling for D7 */
+		start = get_timer(0);
+		while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
+				(data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
+
+			if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
+				return (1);
+		}
+	}
+
+	return (0);
+}
+
+#ifdef CFG_FLASH_2ND_16BIT_DEV
+
+#undef  CFG_FLASH_WORD_SIZE
+#define CFG_FLASH_WORD_SIZE unsigned short
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
+{
+	short i;
+	CFG_FLASH_WORD_SIZE value;
+	ulong base = (ulong) addr;
+	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
+
+	DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);
+
+	/* issue bank reset to return to read mode */
+	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;
+
+	/* Write auto select command: read Manufacturer ID */
+	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
+	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
+	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90009000;
+	udelay(1000);
+
+	value = swap16(addr2[0]);
+	DEBUGF("FLASH MANUFACT: %x\n", value);
+
+	switch (value) {
+		case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
+			info->flash_id = FLASH_MAN_AMD;
+			break;
+		case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
+			info->flash_id = FLASH_MAN_FUJ;
+			break;
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			info->sector_count = 0;
+			info->size = 0;
+			return (0);	/* no or unknown flash  */
+	}
+
+	value = swap16(addr2[1]);	/* device ID            */
+	DEBUGF("\nFLASH DEVICEID: %x\n", value);
+
+	switch (value) {
+		case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
+			info->flash_id += FLASH_AM320B;
+			info->sector_count = 71;
+			info->size = 0x00400000;
+			break;	/* => 4 MB	*/
+		case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
+			info->flash_id += FLASH_AM320T;
+			info->sector_count = 71;
+			info->size = 0x00400000;
+			break;	/* => 4 MB	*/
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			return (0);	/* => no or unknown flash */
+	}
+
+	if (info->flash_id & FLASH_BTYPE) {
+		/* set sector offsets for bottom boot block type        */
+		info->start[0] = base + 0x00000000;
+		info->start[1] = base + 0x00002000;
+		info->start[2] = base + 0x00004000;
+		info->start[3] = base + 0x00006000;
+		info->start[4] = base + 0x00008000;
+		info->start[5] = base + 0x0000a000;
+		info->start[6] = base + 0x0000c000;
+		info->start[7] = base + 0x0000e000;
+
+		for (i = 8; i < info->sector_count; i++)
+			info->start[i] = base + (i * 0x00010000) - 0x00070000;
+	} else {
+		/* set sector offsets for top boot block type           */
+		i = info->sector_count - 1;
+		info->start[i--] = base + info->size - 0x00002000;
+		info->start[i--] = base + info->size - 0x00004000;
+		info->start[i--] = base + info->size - 0x00006000;
+		info->start[i--] = base + info->size - 0x00008000;
+		info->start[i--] = base + info->size - 0x0000a000;
+		info->start[i--] = base + info->size - 0x0000c000;
+		info->start[i--] = base + info->size - 0x0000e000;
+
+		for (; i >= 0; i--)
+			info->start[i] = base + i * 0x00010000;
+	}
+
+	/* 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 */
+		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
+
+		info->protect[i] = addr2[2] & 1;
+	}
+
+	/* issue bank reset to return to read mode */
+	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;
+
+	return (info->size);
+}
+
+static int wait_for_DQ7_16(flash_info_t * info, int sect)
+{
+	ulong start, now, last;
+	volatile CFG_FLASH_WORD_SIZE *addr =
+		(CFG_FLASH_WORD_SIZE *) (info->start[sect]);
+
+	start = get_timer(0);
+	last = start;
+	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
+			(CFG_FLASH_WORD_SIZE) 0x80008000) {
+		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 */
+			putc('.');
+			last = now;
+		}
+	}
+	return 0;
+}
+
+static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
+{
+	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
+	volatile CFG_FLASH_WORD_SIZE *addr2;
+	int flag, prot, sect, l_sect;
+
+	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) {
+		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!",	prot);
+
+	printf("\n");
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
+
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
+			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x80008000;
+			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
+			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
+			addr2[0] = (CFG_FLASH_WORD_SIZE) 0x30003000;	/* sector erase */
+
+			l_sect = sect;
+			/*
+			 * Wait for each sector to complete, it's more
+			 * reliable.  According to AMD Spec, you must
+			 * issue all erase commands within a specified
+			 * timeout.  This has been seen to fail, especially
+			 * if printf()s are included (for debug)!!
+			 */
+			wait_for_DQ7_16(info, sect);
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay(1000);
+
+	/* reset to read mode */
+	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
+	addr[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;	/* reset bank */
+
+	printf(" done\n");
+	return 0;
+}
+
+static int write_word_16(flash_info_t * info, ulong dest, ulong data)
+{
+	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
+	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
+	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
+	ulong start;
+	int i;
+
+	/* Check if Flash is (sufficiently) erased */
+	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
+		if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
+			return (2);
+	}
+
+	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
+		int flag;
+
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
+		addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
+		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xA000A000;
+
+		dest2[i] = swap16(data2[i]);
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* data polling for D7 */
+		start = get_timer(0);
+		while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
+				(swap16(data2[i]) & (CFG_FLASH_WORD_SIZE) 0x80008000)) {
+
+			if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+				return (1);
+			}
+		}
+	}
+
+	return (0);
+}
+#endif /* CFG_FLASH_2ND_16BIT_DEV */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_long * addr, flash_info_t * info);
+static int write_word(flash_info_t * info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init(void)
+{
+	unsigned long total_b = 0;
+	unsigned long size_b[CFG_MAX_FLASH_BANKS];
+	unsigned short index = 0;
+	int i;
+
+	DEBUGF("\n");
+	DEBUGF("FLASH: Index: %d\n", index);
+
+	/* Init: no FLASHes known */
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+		flash_info[i].sector_count = -1;
+		flash_info[i].size = 0;
+
+		/* check whether the address is 0 */
+		if (flash_addr_table[index][i] == 0)
+			continue;
+
+		/* call flash_get_size() to initialize sector address */
+		size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
+				&flash_info[i]);
+
+		flash_info[i].size = size_b[i];
+
+		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+			printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
+					i, size_b[i], size_b[i] << 20);
+			flash_info[i].sector_count = -1;
+			flash_info[i].size = 0;
+		}
+
+		/* Monitor protection ON by default */
+		(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+				    CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+				    &flash_info[i]);
+#if defined(CFG_ENV_IS_IN_FLASH)
+		(void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
+				    CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
+				    &flash_info[i]);
+#if defined(CFG_ENV_ADDR_REDUND)
+		(void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
+				    CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
+				    &flash_info[i]);
+#endif
+#endif
+		total_b += flash_info[i].size;
+	}
+
+	return total_b;
+}
+#endif /* ifdef CONFIG_CAM5200 */