/* * (C) Copyright 2001 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. * * (C) Copyright 2002 * 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 <flash.h>#include <asm/io.h>#include "memio.h"/*---------------------------------------------------------------------*/#undef DEBUG_FLASH#ifdef DEBUG_FLASH#define DEBUGF(fmt,args...) printf(fmt ,##args)#else#define DEBUGF(fmt,args...)#endif/*---------------------------------------------------------------------*/flash_info_t	flash_info[CFG_MAX_FLASH_BANKS];static ulong flash_get_size (ulong addr, flash_info_t *info);static int flash_get_offsets (ulong base, flash_info_t *info);static int write_word (flash_info_t *info, ulong dest, ulong data);static void flash_reset (ulong addr);int flash_xd_nest;static void flash_to_xd(void){    unsigned char x;    flash_xd_nest ++;    if (flash_xd_nest == 1)    {	DEBUGF("Flash on XD\n");	x = pci_read_cfg_byte(0, 0, 0x74);	pci_write_cfg_byte(0, 0, 0x74, x|1);    }}static void flash_to_mem(void){    unsigned char x;    flash_xd_nest --;    if (flash_xd_nest == 0)    {	DEBUGF("Flash on memory bus\n");	x = pci_read_cfg_byte(0, 0, 0x74);	pci_write_cfg_byte(0, 0, 0x74, x&0xFE);    }}unsigned long flash_init_old(void){    int i;    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)    {	flash_info[i].flash_id = FLASH_UNKNOWN;	flash_info[i].sector_count = 0;	flash_info[i].size = 0;    }    return 1;}unsigned long flash_init (void){	unsigned int i;	unsigned long flash_size = 0;	flash_xd_nest = 0;	flash_to_xd();	/* 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 = 0;		flash_info[i].size = 0;	}	DEBUGF("\n## Get flash size @ 0x%08x\n", CFG_FLASH_BASE);	flash_size = flash_get_size (CFG_FLASH_BASE, flash_info);	DEBUGF("## Flash bank size: %08lx\n", flash_size);	if (flash_size) {#if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \    CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_FLASH_MAX_SIZE		/* monitor protection ON by default */		flash_protect(FLAG_PROTECT_SET,			      CFG_MONITOR_BASE,			      CFG_MONITOR_BASE + monitor_flash_len - 1,			      &flash_info[0]);#endif#ifdef CFG_ENV_IS_IN_FLASH		/* ENV protection ON by default */		flash_protect(FLAG_PROTECT_SET,			      CFG_ENV_ADDR,			      CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,			      &flash_info[0]);#endif	} else {		puts ("Warning: the BOOT Flash is not initialised !");	}	flash_to_mem();	return flash_size;}/* * The following code cannot be run from FLASH! */static ulong flash_get_size (ulong addr, flash_info_t *info){	short i;	uchar value;	uchar *x = (uchar *)addr;	flash_to_xd();	/* Write auto select command: read Manufacturer ID */	x[0x0555] =  0xAA;	__asm volatile ("sync\n eieio");	x[0x02AA] =  0x55;	__asm volatile ("sync\n eieio");	x[0x0555] =  0x90;	__asm volatile ("sync\n eieio");	value = x[0];	__asm volatile ("sync\n eieio");	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value);	switch (value | (value << 16)) {		case AMD_MANUFACT:			info->flash_id = FLASH_MAN_AMD;			break;		case FUJ_MANUFACT:			info->flash_id = FLASH_MAN_FUJ;			break;		case STM_MANUFACT:			info->flash_id = FLASH_MAN_STM;			break;		default:			info->flash_id = FLASH_UNKNOWN;			info->sector_count = 0;			info->size = 0;			flash_reset (addr);			return 0;	}	value = x[1];	__asm volatile ("sync\n eieio");	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value);	switch (value) {		case AMD_ID_F040B:			DEBUGF("Am29F040B\n");			info->flash_id += FLASH_AM040;			info->sector_count = 8;			info->size = 0x00080000;			break;			/* => 512 kB		*/		case AMD_ID_LV040B:			DEBUGF("Am29LV040B\n");			info->flash_id += FLASH_AM040;			info->sector_count = 8;			info->size = 0x00080000;			break;			/* => 512 kB		*/		case AMD_ID_LV400T:			DEBUGF("Am29LV400T\n");			info->flash_id += FLASH_AM400T;			info->sector_count = 11;			info->size = 0x00100000;			break;			/* => 1 MB		*/		case AMD_ID_LV400B:			DEBUGF("Am29LV400B\n");			info->flash_id += FLASH_AM400B;			info->sector_count = 11;			info->size = 0x00100000;			break;			/* => 1 MB		*/		case AMD_ID_LV800T:			DEBUGF("Am29LV800T\n");			info->flash_id += FLASH_AM800T;			info->sector_count = 19;			info->size = 0x00200000;			break;			/* => 2 MB		*/		case AMD_ID_LV800B:			DEBUGF("Am29LV400B\n");			info->flash_id += FLASH_AM800B;			info->sector_count = 19;			info->size = 0x00200000;			break;			/* => 2 MB		*/		case AMD_ID_LV160T:			DEBUGF("Am29LV160T\n");			info->flash_id += FLASH_AM160T;			info->sector_count = 35;			info->size = 0x00400000;			break;			/* => 4 MB		*/		case AMD_ID_LV160B:			DEBUGF("Am29LV160B\n");			info->flash_id += FLASH_AM160B;			info->sector_count = 35;			info->size = 0x00400000;			break;			/* => 4 MB		*/		case AMD_ID_LV320T:			DEBUGF("Am29LV320T\n");			info->flash_id += FLASH_AM320T;			info->sector_count = 67;			info->size = 0x00800000;			break;			/* => 8 MB		*/#if 0		/* Has the same ID as AMD_ID_LV320T, to be fixed */		case AMD_ID_LV320B:			DEBUGF("Am29LV320B\n");			info->flash_id += FLASH_AM320B;			info->sector_count = 67;			info->size = 0x00800000;			break;			/* => 8 MB		*/#endif		case AMD_ID_LV033C:			DEBUGF("Am29LV033C\n");			info->flash_id += FLASH_AM033C;			info->sector_count = 64;			info->size = 0x01000000;			break;			/* => 16Mb		*/		case STM_ID_F040B:			DEBUGF("M29F040B\n");			info->flash_id += FLASH_AM040;			info->sector_count = 8;			info->size = 0x00080000;			break;			/* => 512 kB		*/		default:			info->flash_id = FLASH_UNKNOWN;			flash_reset (addr);			flash_to_mem();			return (0);		/* => no or unknown flash */	}	if (info->sector_count > CFG_MAX_FLASH_SECT) {		printf ("** ERROR: sector count %d > max (%d) **\n",			info->sector_count, CFG_MAX_FLASH_SECT);		info->sector_count = CFG_MAX_FLASH_SECT;	}	if (! flash_get_offsets (addr, info)) {		flash_reset (addr);		flash_to_mem();		return 0;	}	/* 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 */		value = in8(info->start[i] + 2);		iobarrier_rw();		info->protect[i] = (value & 1) != 0;	}	/*	 * Reset bank to read mode	 */	flash_reset (addr);	flash_to_mem();	return (info->size);}static int flash_get_offsets (ulong base, flash_info_t *info){	unsigned int i;	switch (info->flash_id & FLASH_TYPEMASK) {		case FLASH_AM040:			/* set sector offsets for uniform sector type	*/			for (i = 0; i < info->sector_count; i++) {				info->start[i] = base + i * info->size /							    info->sector_count;			}			break;		default:			return 0;	}	return 1;}int flash_erase (flash_info_t *info, int s_first, int s_last){	volatile ulong addr = info->start[0];	int flag, prot, sect, l_sect;	ulong start, now, last;	flash_to_xd();	if (s_first < 0 || s_first > s_last) {		if (info->flash_id == FLASH_UNKNOWN) {			printf ("- missing\n");		} else {			printf ("- no sectors to erase\n");		}		flash_to_mem();		return 1;	}	if (info->flash_id == FLASH_UNKNOWN) {		printf ("Can't erase unknown flash type %08lx - aborted\n",			info->flash_id);		flash_to_mem();		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();	out8(addr + 0x555, 0xAA);	iobarrier_rw();	out8(addr + 0x2AA, 0x55);	iobarrier_rw();	out8(addr + 0x555, 0x80);	iobarrier_rw();	out8(addr + 0x555, 0xAA);	iobarrier_rw();	out8(addr + 0x2AA, 0x55);	iobarrier_rw();	/* Start erase on unprotected sectors */	for (sect = s_first; sect<=s_last; sect++) {		if (info->protect[sect] == 0) {	/* not protected */			addr = info->start[sect];			out8(addr, 0x30);			iobarrier_rw();			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 = info->start[l_sect];	DEBUGF ("Start erase timeout: %d\n", CFG_FLASH_ERASE_TOUT);	while ((in8(addr) & 0x80) != 0x80) {		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {			printf ("Timeout\n");			flash_reset (info->start[0]);			flash_to_mem();			return 1;		}		/* show that we're waiting */		if ((now - last) > 1000) {	/* every second */			putc ('.');			last = now;		}		iobarrier_rw();	}DONE:	/* reset to read mode */	flash_reset (info->start[0]);	flash_to_mem();	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;	flash_to_xd();	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) {			flash_to_mem();			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) {			flash_to_mem();			return (rc);		}		wp  += 4;		cnt -= 4;	}	if (cnt == 0) {		flash_to_mem();		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);	}	flash_to_mem();	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){	volatile ulong addr = info->start[0];	ulong start;	int i;	flash_to_xd();	/* Check if Flash is (sufficiently) erased */	if ((in32(dest) & data) != data) {		flash_to_mem();		return (2);	}	/* write each byte out */	for (i = 0; i < 4; i++) {		char *data_ch = (char *)&data;		int flag = disable_interrupts();		out8(addr + 0x555, 0xAA);		iobarrier_rw();		out8(addr + 0x2AA, 0x55);		iobarrier_rw();		out8(addr + 0x555, 0xA0);		iobarrier_rw();		out8(dest+i, data_ch[i]);		iobarrier_rw();		/* re-enable interrupts if necessary */		if (flag)			enable_interrupts();		/* data polling for D7 */		start = get_timer (0);		while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) {			if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {				flash_reset (addr);				flash_to_mem();				return (1);			}			iobarrier_rw();		}	}	flash_reset (addr);	flash_to_mem();	return (0);}/* * Reset bank to read mode */static void flash_reset (ulong addr){	flash_to_xd();	out8(addr, 0xF0);	/* reset bank */	iobarrier_rw();	flash_to_mem();}void flash_print_info (flash_info_t *info){	int i;	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_BM:	printf ("BRIGHT MICRO ");	break;	case FLASH_MAN_STM:	printf ("SGS THOMSON ");	break;	default:		printf ("Unknown Vendor ");	break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM040:	printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");				break;	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");				break;	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");				break;	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");				break;	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");				break;	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");				break;	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");				break;	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");				break;	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");				break;	default:		printf ("Unknown Chip Type\n");				break;	}	if (info->size % 0x100000 == 0) {		printf ("  Size: %ld MB in %d Sectors\n",			info->size / 0x100000, info->sector_count);	} else if (info->size % 0x400 == 0) {		printf ("  Size: %ld KB in %d Sectors\n",			info->size / 0x400, info->sector_count);	} else {		printf ("  Size: %ld B in %d Sectors\n",			info->size, 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");}