cfi_flash.c

最新版的u-boot,2008-10-18发布

		break;
	case FLASH_CFI_32BIT:
		debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
		retval = (flash_read32(addr) == cword.l);
		break;
	case FLASH_CFI_64BIT:
#ifdef DEBUG
		{
			char str1[20];
			char str2[20];

			print_longlong (str1, flash_read64(addr));
			print_longlong (str2, cword.ll);
			debug ("is= %s %s\n", str1, str2);
		}
#endif
		retval = (flash_read64(addr) == cword.ll);
		break;
	default:
		retval = 0;
		break;
	}
	flash_unmap(info, sect, offset, addr);

	return retval;
}

/*-----------------------------------------------------------------------
 */
static int flash_isset (flash_info_t * info, flash_sect_t sect,
			uint offset, uchar cmd)
{
	void *addr;
	cfiword_t cword;
	int retval;

	addr = flash_map (info, sect, offset);
	flash_make_cmd (info, cmd, &cword);
	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		retval = ((flash_read8(addr) & cword.c) == cword.c);
		break;
	case FLASH_CFI_16BIT:
		retval = ((flash_read16(addr) & cword.w) == cword.w);
		break;
	case FLASH_CFI_32BIT:
		retval = ((flash_read32(addr) & cword.l) == cword.l);
		break;
	case FLASH_CFI_64BIT:
		retval = ((flash_read64(addr) & cword.ll) == cword.ll);
		break;
	default:
		retval = 0;
		break;
	}
	flash_unmap(info, sect, offset, addr);

	return retval;
}

/*-----------------------------------------------------------------------
 */
static int flash_toggle (flash_info_t * info, flash_sect_t sect,
			 uint offset, uchar cmd)
{
	void *addr;
	cfiword_t cword;
	int retval;

	addr = flash_map (info, sect, offset);
	flash_make_cmd (info, cmd, &cword);
	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		retval = flash_read8(addr) != flash_read8(addr);
		break;
	case FLASH_CFI_16BIT:
		retval = flash_read16(addr) != flash_read16(addr);
		break;
	case FLASH_CFI_32BIT:
		retval = flash_read32(addr) != flash_read32(addr);
		break;
	case FLASH_CFI_64BIT:
		retval = flash_read64(addr) != flash_read64(addr);
		break;
	default:
		retval = 0;
		break;
	}
	flash_unmap(info, sect, offset, addr);

	return retval;
}

/*
 * flash_is_busy - check to see if the flash is busy
 *
 * This routine checks the status of the chip and returns true if the
 * chip is busy.
 */
static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
{
	int retval;

	switch (info->vendor) {
	case CFI_CMDSET_INTEL_PROG_REGIONS:
	case CFI_CMDSET_INTEL_STANDARD:
	case CFI_CMDSET_INTEL_EXTENDED:
		retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
		break;
	case CFI_CMDSET_AMD_STANDARD:
	case CFI_CMDSET_AMD_EXTENDED:
#ifdef CONFIG_FLASH_CFI_LEGACY
	case CFI_CMDSET_AMD_LEGACY:
#endif
		retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
		break;
	default:
		retval = 0;
	}
	debug ("flash_is_busy: %d\n", retval);
	return retval;
}

/*-----------------------------------------------------------------------
 *  wait for XSR.7 to be set. Time out with an error if it does not.
 *  This routine does not set the flash to read-array mode.
 */
static int flash_status_check (flash_info_t * info, flash_sect_t sector,
			       ulong tout, char *prompt)
{
	ulong start;

#if CFG_HZ != 1000
	tout *= CFG_HZ/1000;
#endif

	/* Wait for command completion */
	start = get_timer (0);
	while (flash_is_busy (info, sector)) {
		if (get_timer (start) > tout) {
			printf ("Flash %s timeout at address %lx data %lx\n",
				prompt, info->start[sector],
				flash_read_long (info, sector, 0));
			flash_write_cmd (info, sector, 0, info->cmd_reset);
			return ERR_TIMOUT;
		}
		udelay (1);		/* also triggers watchdog */
	}
	return ERR_OK;
}

/*-----------------------------------------------------------------------
 * Wait for XSR.7 to be set, if it times out print an error, otherwise
 * do a full status check.
 *
 * This routine sets the flash to read-array mode.
 */
static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
				    ulong tout, char *prompt)
{
	int retcode;

	retcode = flash_status_check (info, sector, tout, prompt);
	switch (info->vendor) {
	case CFI_CMDSET_INTEL_PROG_REGIONS:
	case CFI_CMDSET_INTEL_EXTENDED:
	case CFI_CMDSET_INTEL_STANDARD:
		if ((retcode != ERR_OK)
		    && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
			retcode = ERR_INVAL;
			printf ("Flash %s error at address %lx\n", prompt,
				info->start[sector]);
			if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
					 FLASH_STATUS_PSLBS)) {
				puts ("Command Sequence Error.\n");
			} else if (flash_isset (info, sector, 0,
						FLASH_STATUS_ECLBS)) {
				puts ("Block Erase Error.\n");
				retcode = ERR_NOT_ERASED;
			} else if (flash_isset (info, sector, 0,
						FLASH_STATUS_PSLBS)) {
				puts ("Locking Error\n");
			}
			if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
				puts ("Block locked.\n");
				retcode = ERR_PROTECTED;
			}
			if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
				puts ("Vpp Low Error.\n");
		}
		flash_write_cmd (info, sector, 0, info->cmd_reset);
		break;
	default:
		break;
	}
	return retcode;
}

/*-----------------------------------------------------------------------
 */
static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
{
#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
	unsigned short	w;
	unsigned int	l;
	unsigned long long ll;
#endif

	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		cword->c = c;
		break;
	case FLASH_CFI_16BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
		w = c;
		w <<= 8;
		cword->w = (cword->w >> 8) | w;
#else
		cword->w = (cword->w << 8) | c;
#endif
		break;
	case FLASH_CFI_32BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
		l = c;
		l <<= 24;
		cword->l = (cword->l >> 8) | l;
#else
		cword->l = (cword->l << 8) | c;
#endif
		break;
	case FLASH_CFI_64BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
		ll = c;
		ll <<= 56;
		cword->ll = (cword->ll >> 8) | ll;
#else
		cword->ll = (cword->ll << 8) | c;
#endif
		break;
	}
}

/* loop through the sectors from the highest address when the passed
 * address is greater or equal to the sector address we have a match
 */
static flash_sect_t find_sector (flash_info_t * info, ulong addr)
{
	flash_sect_t sector;

	for (sector = info->sector_count - 1; sector >= 0; sector--) {
		if (addr >= info->start[sector])
			break;
	}
	return sector;
}

/*-----------------------------------------------------------------------
 */
static int flash_write_cfiword (flash_info_t * info, ulong dest,
				cfiword_t cword)
{
	void *dstaddr;
	int flag;
	flash_sect_t sect;

	dstaddr = map_physmem(dest, info->portwidth, MAP_NOCACHE);

	/* Check if Flash is (sufficiently) erased */
	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
		break;
	case FLASH_CFI_16BIT:
		flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
		break;
	case FLASH_CFI_32BIT:
		flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
		break;
	case FLASH_CFI_64BIT:
		flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
		break;
	default:
		flag = 0;
		break;
	}
	if (!flag) {
		unmap_physmem(dstaddr, info->portwidth);
		return ERR_NOT_ERASED;
	}

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

	switch (info->vendor) {
	case CFI_CMDSET_INTEL_PROG_REGIONS:
	case CFI_CMDSET_INTEL_EXTENDED:
	case CFI_CMDSET_INTEL_STANDARD:
		flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
		flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
		break;
	case CFI_CMDSET_AMD_EXTENDED:
	case CFI_CMDSET_AMD_STANDARD:
#ifdef CONFIG_FLASH_CFI_LEGACY
	case CFI_CMDSET_AMD_LEGACY:
#endif
		sect = find_sector(info, dest);
		flash_unlock_seq (info, sect);
		flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
		break;
	}

	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		flash_write8(cword.c, dstaddr);
		break;
	case FLASH_CFI_16BIT:
		flash_write16(cword.w, dstaddr);
		break;
	case FLASH_CFI_32BIT:
		flash_write32(cword.l, dstaddr);
		break;
	case FLASH_CFI_64BIT:
		flash_write64(cword.ll, dstaddr);
		break;
	}

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts ();

	unmap_physmem(dstaddr, info->portwidth);

	return flash_full_status_check (info, find_sector (info, dest),
					info->write_tout, "write");
}

#ifdef CFG_FLASH_USE_BUFFER_WRITE

static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
				  int len)
{
	flash_sect_t sector;
	int cnt;
	int retcode;
	void *src = cp;
	void *dst = map_physmem(dest, len, MAP_NOCACHE);
	void *dst2 = dst;
	int flag = 0;
	uint offset = 0;
	unsigned int shift;
	uchar write_cmd;

	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		shift = 0;
		break;
	case FLASH_CFI_16BIT:
		shift = 1;
		break;
	case FLASH_CFI_32BIT:
		shift = 2;
		break;
	case FLASH_CFI_64BIT:
		shift = 3;
		break;
	default:
		retcode = ERR_INVAL;
		goto out_unmap;
	}

	cnt = len >> shift;

	while ((cnt-- > 0) && (flag == 0)) {
		switch (info->portwidth) {
		case FLASH_CFI_8BIT:
			flag = ((flash_read8(dst2) & flash_read8(src)) ==
				flash_read8(src));
			src += 1, dst2 += 1;
			break;
		case FLASH_CFI_16BIT:
			flag = ((flash_read16(dst2) & flash_read16(src)) ==
				flash_read16(src));
			src += 2, dst2 += 2;
			break;
		case FLASH_CFI_32BIT:
			flag = ((flash_read32(dst2) & flash_read32(src)) ==
				flash_read32(src));
			src += 4, dst2 += 4;
			break;
		case FLASH_CFI_64BIT:
			flag = ((flash_read64(dst2) & flash_read64(src)) ==
				flash_read64(src));
			src += 8, dst2 += 8;
			break;
		}
	}
	if (!flag) {
		retcode = ERR_NOT_ERASED;
		goto out_unmap;
	}

	src = cp;
	sector = find_sector (info, dest);

	switch (info->vendor) {
	case CFI_CMDSET_INTEL_PROG_REGIONS:
	case CFI_CMDSET_INTEL_STANDARD:
	case CFI_CMDSET_INTEL_EXTENDED:
		write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
					FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
		flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
		flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
		flash_write_cmd (info, sector, 0, write_cmd);
		retcode = flash_status_check (info, sector,
					      info->buffer_write_tout,
					      "write to buffer");
		if (retcode == ERR_OK) {
			/* reduce the number of loops by the width of
			 * the port */
			cnt = len >> shift;
			flash_write_cmd (info, sector, 0, cnt - 1);
			while (cnt-- > 0) {
				switch (info->portwidth) {
				case FLASH_CFI_8BIT:
					flash_write8(flash_read8(src), dst);
					src += 1, dst += 1;
					break;
				case FLASH_CFI_16BIT:
					flash_write16(flash_read16(src), dst);
					src += 2, dst += 2;
					break;
				case FLASH_CFI_32BIT:
					flash_write32(flash_read32(src), dst);
					src += 4, dst += 4;
					break;
				case FLASH_CFI_64BIT:
					flash_write64(flash_read64(src), dst);
					src += 8, dst += 8;
					break;
				default:
					retcode = ERR_INVAL;
					goto out_unmap;
				}
			}
			flash_write_cmd (info, sector, 0,
					 FLASH_CMD_WRITE_BUFFER_CONFIRM);
			retcode = flash_full_status_check (
				info, sector, info->buffer_write_tout,
				"buffer write");
		}

		break;

	case CFI_CMDSET_AMD_STANDARD:
	case CFI_CMDSET_AMD_EXTENDED:
		flash_unlock_seq(info,0);

#ifdef CONFIG_FLASH_SPANSION_S29WS_N
		offset = ((unsigned long)dst - info->start[sector]) >> shift;
#endif
		flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
		cnt = len >> shift;
		flash_write_cmd(info, sector, offset, (uchar)cnt - 1);

		switch (info->portwidth) {
		case FLASH_CFI_8BIT:
			while (cnt-- > 0) {
				flash_write8(flash_read8(src), dst);
				src += 1, dst += 1;
			}
			break;
		case FLASH_CFI_16BIT:
			while (cnt-- > 0) {
				flash_write16(flash_read16(src), dst);
				src += 2, dst += 2;
			}
			break;
		case FLASH_CFI_32BIT:
			while (cnt-- > 0) {
				flash_write32(flash_read32(src), dst);
				src += 4, dst += 4;
			}
			break;
		case FLASH_CFI_64BIT:
			while (cnt-- > 0) {
				flash_write64(flash_read64(src), dst);
				src += 8, dst += 8;
			}
			break;
		default:
			retcode = ERR_INVAL;
			goto out_unmap;
		}

		flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
		retcode = flash_full_status_check (info, sector,
						   info->buffer_write_tout,
						   "buffer write");
		break;

	default:
		debug ("Unknown Command Set\n");
		retcode = ERR_INVAL;
		break;
	}

out_unmap:
	unmap_physmem(dst, len);
	return retcode;
}
#endif /* CFG_FLASH_USE_BUFFER_WRITE */


/*-----------------------------------------------------------------------
 */
int flash_erase (flash_info_t * info, int s_first, int s_last)