board/snmc/qs850/flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2003
  * MuLogic B.V.
  *
  * (C) Copyright 2001
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <asm/ppc4xx.h>
 #include <asm/u-boot.h>
 #include <asm/processor.h>

 flash_info_t flash_info[CONFIG_SYS_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<CONFIG_SYS_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 (CONFIG_SYS_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, CONFIG_SYS_MONITOR_BASE,
 			CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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(EBC0_CFGADDR, PB0CR);
 		pbcr = mfdcr(EBC0_CFGDATA);
 		mtdcr(EBC0_CFGADDR, PB0CR);
 		base_b1 = -size_b1;
 		pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
 		mtdcr(EBC0_CFGDATA, pbcr);
 	}

 	if (size_b0) {
 		mtdcr(EBC0_CFGADDR, PB1CR);
 		pbcr = mfdcr(EBC0_CFGDATA);
 		mtdcr(EBC0_CFGADDR, PB1CR);
 		base_b0 = base_b1 - size_b0;
 		pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
 		mtdcr(EBC0_CFGDATA, 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, CONFIG_SYS_MONITOR_BASE,
 		CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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-CONFIG_SYS_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-CONFIG_SYS_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)) > CONFIG_SYS_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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 			return (1);
 		}
 	}

 	return (0);
 }
	/*
	* (C) Copyright 2003
	* MuLogic B.V.
	*
	* (C) Copyright 2001
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <asm/ppc4xx.h>
	#include <asm/u-boot.h>
	#include <asm/processor.h>

	flash_info_t flash_info[CONFIG_SYS_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<CONFIG_SYS_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 < 810241024) {
	/* 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 (CONFIG_SYS_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, CONFIG_SYS_MONITOR_BASE,
	CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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(EBC0_CFGADDR, PB0CR);
	pbcr = mfdcr(EBC0_CFGDATA);
	mtdcr(EBC0_CFGADDR, PB0CR);
	base_b1 = -size_b1;
	pbcr = (pbcr & 0x0001ffff) \| base_b1 \| (((size_b1/1024/1024)-1)<<17);
	mtdcr(EBC0_CFGDATA, pbcr);
	}

	if (size_b0) {
	mtdcr(EBC0_CFGADDR, PB1CR);
	pbcr = mfdcr(EBC0_CFGDATA);
	mtdcr(EBC0_CFGADDR, PB1CR);
	base_b0 = base_b1 - size_b0;
	pbcr = (pbcr & 0x0001ffff) \| base_b0 \| (((size_b0/1024/1024)-1)<<17);
	mtdcr(EBC0_CFGDATA, 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, CONFIG_SYS_MONITOR_BASE,
	CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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-CONFIG_SYS_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-CONFIG_SYS_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)) > CONFIG_SYS_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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
	return (1);
	}
	}

	return (0);
	}