/* * (C) Copyright 2001, 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Flash Routines for Intel devices * *-------------------------------------------------------------------- * 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 <mpc8xx.h>flash_info_t flash_info[CFG_MAX_FLASH_BANKS];/*----------------------------------------------------------------------- */ulong flash_get_size (volatile unsigned long *baseaddr,					  flash_info_t * info){	short i;	unsigned long flashtest_h, flashtest_l;	info->sector_count = info->size = 0;	info->flash_id = FLASH_UNKNOWN;	/* Write query command sequence and test FLASH answer	 */	baseaddr[0] = 0x00980098;	baseaddr[1] = 0x00980098;	flashtest_h = baseaddr[0];	/* manufacturer ID	*/	flashtest_l = baseaddr[1];	if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)		return (0);		/* no or unknown flash	*/	flashtest_h = baseaddr[2];	/* device ID	        */	flashtest_l = baseaddr[3];	if (flashtest_h != flashtest_l)		return (0);	switch (flashtest_h) {	case INTEL_ID_28F160C3B:		info->flash_id = FLASH_28F160C3B;		info->sector_count = 39;		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB	*/		break;	case INTEL_ID_28F160F3B:		info->flash_id = FLASH_28F160F3B;		info->sector_count = 39;		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB      */		break;	default:		return (0);			/* no or unknown flash	*/	}	info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */	if (info->flash_id & FLASH_BTYPE) {		volatile unsigned long *tmp = baseaddr;		/* set up sector start adress table (bottom sector type)		 * AND unlock the sectors (if our chip is 160C3)		 */		for (i = 0; i < info->sector_count; i++) {			if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) {				tmp[0] = 0x00600060;				tmp[1] = 0x00600060;				tmp[0] = 0x00D000D0;				tmp[1] = 0x00D000D0;			}			info->start[i] = (uint) tmp;			tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith       */		}	}	memset (info->protect, 0, info->sector_count);	baseaddr[0] = 0x00FF00FF;	baseaddr[1] = 0x00FF00FF;	return (info->size);}/*----------------------------------------------------------------------- */unsigned long flash_init (void){	unsigned long size_b0 = 0;	int i;	/* 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 (only one bank) */	size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",				size_b0, size_b0 >> 20);	}	/* protect monitor and environment sectors	 */#ifndef CONFIG_BOOT_ROM	/* If U-Boot is  booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE	 * but we shouldn't protect it.	 */# if CFG_MONITOR_BASE >= CFG_FLASH0_BASE	flash_protect (FLAG_PROTECT_SET,		       CFG_MONITOR_BASE,		       CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]	);# endif#endif	/* CONFIG_BOOT_ROM */#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)# ifndef  CFG_ENV_SIZE#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE# endif	flash_protect (FLAG_PROTECT_SET,		       CFG_ENV_ADDR,		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);#endif	return (size_b0);}/*----------------------------------------------------------------------- */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 >> 16) & 0xff) {	case 0x89:		printf ("INTEL ");		break;	default:		printf ("Unknown Vendor ");		break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_28F160C3B:		printf ("28F160C3B (16 M, bottom sector)\n");		break;	case FLASH_28F160F3B:		printf ("28F160F3B (16 M, bottom sector)\n");		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");}/*----------------------------------------------------------------------- */int flash_erase (flash_info_t * info, int s_first, int s_last){	int flag, prot, sect;	ulong start, now, last;	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;	}	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");	}	/* Start erase on unprotected sectors	 */	for (sect = s_first; sect <= s_last; sect++) {		volatile ulong *addr =				(volatile unsigned long *) info->start[sect];		start = get_timer (0);		last = start;		if (info->protect[sect] == 0) {			/* Disable interrupts which might cause a timeout here			 */			flag = disable_interrupts ();			/* Erase the block			 */			addr[0] = 0x00200020;			addr[1] = 0x00200020;			addr[0] = 0x00D000D0;			addr[1] = 0x00D000D0;			/* re-enable interrupts if necessary			 */			if (flag)				enable_interrupts ();			/* wait at least 80us - let's wait 1 ms			 */			udelay (1000);			last = start;			while ((addr[0] & 0x00800080) != 0x00800080 ||				   (addr[1] & 0x00800080) != 0x00800080) {				if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {					printf ("Timeout (erase suspended!)\n");					/* Suspend erase					 */					addr[0] = 0x00B000B0;					addr[1] = 0x00B000B0;					goto DONE;				}				/* show that we're waiting				 */				if ((now - last) > 1000) {	/* every second */					serial_putc ('.');					last = now;				}			}			if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {				printf ("*** ERROR: erase failed!\n");				goto DONE;			}		}		/* Clear status register and reset to read mode		 */		addr[0] = 0x00500050;		addr[1] = 0x00500050;		addr[0] = 0x00FF00FF;		addr[1] = 0x00FF00FF;	}	printf (" done\n");DONE:	return 0;}static int write_word (flash_info_t *, volatile unsigned long *, ulong);/*----------------------------------------------------------------------- * 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 v;	int i, l, cc = cnt, res = 0;	for (v=0; cc > 0; addr += 4, cc -= 4 - l) {		l = (addr & 3);		addr &= ~3;		for (i = 0; i < 4; i++) {			v = (v << 8) + (i < l || i - l >= cc ?				*((unsigned char *) addr + i) : *src++);		}		if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)			break;	}	return (res);}/*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */static int write_word (flash_info_t * info, volatile unsigned long *addr,					   ulong data){	int flag, res = 0;	ulong start;	/* Check if Flash is (sufficiently) erased	 */	if ((*addr & data) != data)		return (2);	/* Disable interrupts which might cause a timeout here	 */	flag = disable_interrupts ();	*addr = 0x00400040;	*addr = data;	/* re-enable interrupts if necessary	 */	if (flag)		enable_interrupts ();	start = get_timer (0);	while ((*addr & 0x00800080) != 0x00800080) {		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {			/* Suspend program			 */			*addr = 0x00B000B0;			res = 1;			goto OUT;		}	}	if (*addr & 0x00220022) {		printf ("*** ERROR: program failed!\n");		res = 1;	}OUT:	/* Clear status register and reset to read mode	 */	*addr = 0x00500050;	*addr = 0x00FF00FF;	return (res);}