/* * (C) Copyright 2002 * Gary Jennejohn, DENX Software Engineering, <gj@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 *//* #define DEBUG */#include <common.h>#include <environment.h>static ulong flash_get_size (vu_long *addr, flash_info_t *info);flash_info_t flash_info[CFG_MAX_FLASH_BANKS];#define CMD_READ_ARRAY		0x00F000F0#define CMD_UNLOCK1		0x00AA00AA#define CMD_UNLOCK2		0x00550055#define CMD_ERASE_SETUP		0x00800080#define CMD_ERASE_CONFIRM	0x00300030#define CMD_PROGRAM		0x00A000A0#define CMD_UNLOCK_BYPASS	0x00200020#define CMD_READ_MANF_ID	0x00900090#define MEM_FLASH_ADDR1		(*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))#define MEM_FLASH_ADDR2		(*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))#define BIT_ERASE_DONE		0x00800080#define BIT_RDY_MASK		0x00800080#define BIT_PROGRAM_ERROR	0x00200020#define BIT_TIMEOUT		0x80000000	/* our flag */#define READY 1#define ERR   2#define TMO   4/*----------------------------------------------------------------------- */ulong flash_init (void){	int i, j;	ulong size = 0;	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {		ulong flashbase = 0;		flash_info_t *info = &flash_info[i];		/* Init: no FLASHes known */		info->flash_id = FLASH_UNKNOWN;		size += flash_get_size (CFG_FLASH_BASE, info);		if (i == 0)			flashbase = CFG_FLASH_BASE;		else			panic ("configured too many flash banks!\n");		for (j = 0; j < info->sector_count; j++) {			info->protect[j] = 0;			info->start[j] = flashbase;			switch (info->flash_id & FLASH_TYPEMASK) {			case (FLASH_AM320B & FLASH_TYPEMASK):				/* Boot sector type: 8 x 8 + N x 128 kB */				flashbase += (j < 8) ? 0x4000 : 0x20000;				break;			case (FLASH_AM640U & FLASH_TYPEMASK):				/* Uniform sector type: 128 kB */				flashbase += 0x20000;				break;			default:				printf ("## Bad flash chip type 0x%04lX\n",					info->flash_id & FLASH_TYPEMASK);			}		}	}	/*	 * Protect monitor and environment sectors	 */	flash_protect ( FLAG_PROTECT_SET,			CFG_FLASH_BASE,			CFG_FLASH_BASE + monitor_flash_len - 1,			&flash_info[0]);	flash_protect ( FLAG_PROTECT_SET,			CFG_ENV_ADDR,			CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);#ifdef CFG_ENV_ADDR_REDUND	flash_protect ( FLAG_PROTECT_SET,			CFG_ENV_ADDR_REDUND,			CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,			&flash_info[0]);#endif	return size;}/*----------------------------------------------------------------------- */void flash_print_info (flash_info_t * info){	int i;	switch (info->flash_id & FLASH_VENDMASK) {	case (FLASH_MAN_AMD & FLASH_VENDMASK):			printf ("AMD ");		break;	case (FLASH_MAN_FUJ & FLASH_VENDMASK):			printf ("FUJITSU ");		break;	default:	printf ("Unknown Vendor ");	break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case (FLASH_AM320B & FLASH_TYPEMASK):		printf ("2x Am29LV320DB (32Mbit)\n");		break;	case (FLASH_AM640U & FLASH_TYPEMASK):		printf ("2x Am29LV640D (64Mbit)\n");		break;	default:		printf ("Unknown Chip Type\n");		goto Done;		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");  Done:}/*----------------------------------------------------------------------- */int flash_erase (flash_info_t * info, int s_first, int s_last){	ulong result;#if 0	int cflag;#endif	int iflag, prot, sect;	int rc = ERR_OK;	int chip1, chip2;	debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);	/* first look for protection bits */	if (info->flash_id == FLASH_UNKNOWN)		return ERR_UNKNOWN_FLASH_TYPE;	if ((s_first < 0) || (s_first > s_last)) {		return ERR_INVAL;	}	switch (info->flash_id & FLASH_VENDMASK) {	case (FLASH_MAN_AMD & FLASH_VENDMASK):	break;	/* OK */	case (FLASH_MAN_FUJ & FLASH_VENDMASK):	break;	/* OK */	default:		debug ("## flash_erase: unknown manufacturer\n");		return (ERR_UNKNOWN_FLASH_VENDOR);	}	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");	}	/*	 * Disable interrupts which might cause a timeout	 * here. Remember that our exception vectors are	 * at address 0 in the flash, and we don't want a	 * (ticker) exception to happen while the flash	 * chip is in programming mode.	 */#if 0	cflag = icache_status ();	icache_disable ();#endif	iflag = disable_interrupts ();	/* Start erase on unprotected sectors */	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {		debug ("Erasing sector %2d @ %08lX... ",			sect, info->start[sect]);		/* arm simple, non interrupt dependent timer */		reset_timer_masked ();		if (info->protect[sect] == 0) {	/* not protected */			vu_long *addr = (vu_long *) (info->start[sect]);			MEM_FLASH_ADDR1 = CMD_UNLOCK1;			MEM_FLASH_ADDR2 = CMD_UNLOCK2;			MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;			MEM_FLASH_ADDR1 = CMD_UNLOCK1;			MEM_FLASH_ADDR2 = CMD_UNLOCK2;			*addr = CMD_ERASE_CONFIRM;			/* wait until flash is ready */			chip1 = chip2 = 0;			do {				result = *addr;				/* check timeout */				if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {					MEM_FLASH_ADDR1 = CMD_READ_ARRAY;					chip1 = TMO;					break;				}				if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)					chip1 = READY;				if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)					chip1 = ERR;				if (!chip2 && (result >> 16) & BIT_ERASE_DONE)					chip2 = READY;				if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)					chip2 = ERR;			} while (!chip1 || !chip2);			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;			if (chip1 == ERR || chip2 == ERR) {				rc = ERR_PROG_ERROR;				goto outahere;			}			if (chip1 == TMO) {				rc = ERR_TIMOUT;				goto outahere;			}		}	}outahere:	/* allow flash to settle - wait 10 ms */	udelay_masked (10000);	if (iflag)		enable_interrupts ();#if 0	if (cflag)		icache_enable ();#endif	return rc;}/*----------------------------------------------------------------------- * Copy memory to flash */volatile static int write_word (flash_info_t * info, ulong dest,								ulong data){	vu_long *addr = (vu_long *) dest;	ulong result;	int rc = ERR_OK;#if 0	int cflag;#endif	int iflag;	int chip1, chip2;	/*	 * Check if Flash is (sufficiently) erased	 */	result = *addr;	if ((result & data) != data)		return ERR_NOT_ERASED;	/*	 * Disable interrupts which might cause a timeout	 * here. Remember that our exception vectors are	 * at address 0 in the flash, and we don't want a	 * (ticker) exception to happen while the flash	 * chip is in programming mode.	 */#if 0	cflag = icache_status ();	icache_disable ();#endif	iflag = disable_interrupts ();	MEM_FLASH_ADDR1 = CMD_UNLOCK1;	MEM_FLASH_ADDR2 = CMD_UNLOCK2;	MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;	*addr = CMD_PROGRAM;	*addr = data;	/* arm simple, non interrupt dependent timer */	reset_timer_masked ();	/* wait until flash is ready */	chip1 = chip2 = 0;	do {		result = *addr;		/* check timeout */		if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {			chip1 = ERR | TMO;			break;		}		if (!chip1 && ((result & 0x80) == (data & 0x80)))			chip1 = READY;		if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {			result = *addr;			if ((result & 0x80) == (data & 0x80))				chip1 = READY;			else				chip1 = ERR;		}		if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))			chip2 = READY;		if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {			result = *addr;			if ((result & (0x80 << 16)) == (data & (0x80 << 16)))				chip2 = READY;			else				chip2 = ERR;		}	} while (!chip1 || !chip2);	*addr = CMD_READ_ARRAY;	if (chip1 == ERR || chip2 == ERR || *addr != data)		rc = ERR_PROG_ERROR;	if (iflag)		enable_interrupts ();#if 0	if (cflag)		icache_enable ();#endif	return rc;}/*----------------------------------------------------------------------- * Copy memory to flash. */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 << 24);		}		for (; i < 4 && cnt > 0; ++i) {			data = (data >> 8) | (*src++ << 24);			--cnt;			++cp;		}		for (; cnt == 0 && i < 4; ++i, ++cp) {			data = (data >> 8) | (*(uchar *) cp << 24);		}		if ((rc = write_word (info, wp, data)) != 0) {			return (rc);		}		wp += 4;	}	/*	 * handle word aligned part	 */	while (cnt >= 4) {		if (((ulong)src) & 0x3) {			for (i = 0; i < 4; i++) {				((char *)&data)[i] = ((vu_char *)src)[i];			}		}		else {			data = *((vu_long *) src);		}		if ((rc = write_word (info, wp, data)) != 0) {			return (rc);		}		src += 4;		wp += 4;		cnt -= 4;	}	if (cnt == 0) {		return ERR_OK;	}	/*	 * handle unaligned tail bytes	 */	data = 0;	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {		data = (data >> 8) | (*src++ << 24);		--cnt;	}	for (; i < 4; ++i, ++cp) {		data = (data >> 8) | (*(uchar *) cp << 24);	}	return write_word (info, wp, data);}/*----------------------------------------------------------------------- */static ulong flash_get_size (vu_long *addr, flash_info_t *info){	ulong value;	/* Write auto select command sequence and read Manufacturer ID */	addr[0x0555] = CMD_UNLOCK1;	addr[0x02AA] = CMD_UNLOCK2;	addr[0x0555] = CMD_READ_MANF_ID;	value = addr[0];	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);	switch (value) {	case AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD;		break;	case FUJ_MANUFACT:		info->flash_id = FLASH_MAN_FUJ;		break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		addr[0] = 0x00FF00FF;		/* restore read mode */		debug ("## flash_init: unknown manufacturer\n");		return (0);			/* no or unknown flash	*/	}	value = addr[1];			/* device ID		*/	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);	switch (value) {	case AMD_ID_LV320B:		info->flash_id += FLASH_AM320B;		info->sector_count = 71;		info->size = 0x00800000;		addr[0] = 0x00FF00FF;		/* restore read mode */		break;				/* =>  8 MB		*/	case AMD_ID_LV640U:		info->flash_id += FLASH_AM640U;		info->sector_count = 128;		info->size = 0x01000000;		addr[0] = 0x00F000F0;		/* restore read mode */		break;				/* => 16 MB		*/	default:		debug ("## flash_init: unknown flash chip\n");		info->flash_id = FLASH_UNKNOWN;		addr[0] = 0x00FF00FF;		/* restore read mode */		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;	}	return (info->size);}