cfi_flash.c

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			} else
				putc ('.');
		}
	}
	puts (" done\n");
	return rcode;
}

/*-----------------------------------------------------------------------
 */
void flash_print_info (flash_info_t * info)
{
	int i;

	if (info->flash_id != FLASH_MAN_CFI) {
		puts ("missing or unknown FLASH type\n");
		return;
	}

	printf ("CFI conformant FLASH (%d x %d)",
		(info->portwidth << 3), (info->chipwidth << 3));
	printf ("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);
	printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
		info->erase_blk_tout,
		info->write_tout,
		info->buffer_write_tout,
		info->buffer_size);

	puts ("  Sector Start Addresses:");
	for (i = 0; i < info->sector_count; ++i) {
#ifdef CFG_FLASH_EMPTY_INFO
		int k;
		int size;
		int erased;
		volatile unsigned long *flash;

		/*
		 * Check if whole sector is erased
		 */
		if (i != (info->sector_count - 1))
			size = info->start[i + 1] - info->start[i];
		else
			size = info->start[0] + info->size - info->start[i];
		erased = 1;
		flash = (volatile unsigned long *) info->start[i];
		size = size >> 2;	/* divide by 4 for longword access */
		for (k = 0; k < size; k++) {
			if (*flash++ != 0xffffffff) {
				erased = 0;
				break;
			}
		}

		if ((i % 5) == 0)
			printf ("\n");
		/* print empty and read-only info */
		printf (" %08lX%s%s",
			info->start[i],
			erased ? " E" : "  ",
			info->protect[i] ? "RO " : "   ");
#else
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i], info->protect[i] ? " (RO)  " : "     ");
#endif
	}
	putc ('\n');
	return;
}

/*-----------------------------------------------------------------------
 * 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 wp;
	ulong cp;
	int aln;
	cfiword_t cword;
	int i, rc;

#ifdef CFG_FLASH_USE_BUFFER_WRITE
	int buffered_size;
#endif
	/* get lower aligned address */
	/* get lower aligned address */
	wp = (addr & ~(info->portwidth - 1));

	/* handle unaligned start */
	if ((aln = addr - wp) != 0) {
		cword.l = 0;
		cp = wp;
		for (i = 0; i < aln; ++i, ++cp)
			flash_add_byte (info, &cword, (*(uchar *) cp));

		for (; (i < info->portwidth) && (cnt > 0); i++) {
			flash_add_byte (info, &cword, *src++);
			cnt--;
			cp++;
		}
		for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
			flash_add_byte (info, &cword, (*(uchar *) cp));
		if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
			return rc;
		wp = cp;
	}

	/* handle the aligned part */
#ifdef CFG_FLASH_USE_BUFFER_WRITE
	buffered_size = (info->portwidth / info->chipwidth);
	buffered_size *= info->buffer_size;
	while (cnt >= info->portwidth) {
		i = buffered_size > cnt ? cnt : buffered_size;
		if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
			return rc;
		i -= (i % info->portwidth);
		wp += i;
		src += i;
		cnt -= i;
	}
#else
	while (cnt >= info->portwidth) {
		cword.l = 0;
		for (i = 0; i < info->portwidth; i++) {
			flash_add_byte (info, &cword, *src++);
		}
		if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
			return rc;
		wp += info->portwidth;
		cnt -= info->portwidth;
	}
#endif /* CFG_FLASH_USE_BUFFER_WRITE */
	if (cnt == 0) {
		return (0);
	}

	/*
	 * handle unaligned tail bytes
	 */
	cword.l = 0;
	for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
		flash_add_byte (info, &cword, *src++);
		--cnt;
	}
	for (; i < info->portwidth; ++i, ++cp) {
		flash_add_byte (info, &cword, (*(uchar *) cp));
	}

	return flash_write_cfiword (info, wp, cword);
}

/*-----------------------------------------------------------------------
 */
#ifdef CFG_FLASH_PROTECTION

int flash_real_protect (flash_info_t * info, long sector, int prot)
{
	int retcode = 0;

	flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
	flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
	if (prot)
		flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
	else
		flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);

	if ((retcode =
	     flash_full_status_check (info, sector, info->erase_blk_tout,
				      prot ? "protect" : "unprotect")) == 0) {

		info->protect[sector] = prot;
		/* Intel's unprotect unprotects all locking */
		if (prot == 0) {
			flash_sect_t i;

			for (i = 0; i < info->sector_count; i++) {
				if (info->protect[i])
					flash_real_protect (info, i, 1);
			}
		}
	}
	return retcode;
}

/*-----------------------------------------------------------------------
 * flash_read_user_serial - read the OneTimeProgramming cells
 */
void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
			     int len)
{
	uchar *src;
	uchar *dst;

	dst = buffer;
	src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION);
	flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
	memcpy (dst, src + offset, len);
	flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
}

/*
 * flash_read_factory_serial - read the device Id from the protection area
 */
void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
				int len)
{
	uchar *src;

	src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
	flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
	memcpy (buffer, src + offset, len);
	flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
}

#endif /* CFG_FLASH_PROTECTION */

/*
 * 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_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:
		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;

	/* Wait for command completion */
	start = get_timer (0);
	while (flash_is_busy (info, sector)) {
		if (get_timer (start) > info->erase_blk_tout * CFG_HZ) {
			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;
		}
	}
	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_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, FLASH_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)
	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)
		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)
		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)
		ll = c;
		ll <<= 56;
		cword->ll = (cword->ll >> 8) | ll;
#else
		cword->ll = (cword->ll << 8) | c;
#endif
		break;
	}
}


/*-----------------------------------------------------------------------
 * make a proper sized command based on the port and chip widths
 */
static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
{
	int i;

#if defined(__LITTLE_ENDIAN)
	ushort stmpw;
	uint   stmpi;
#endif
	uchar *cp = (uchar *) cmdbuf;

	for (i = 0; i < info->portwidth; i++)
		*cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd;
#if defined(__LITTLE_ENDIAN)
	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		break;
	case FLASH_CFI_16BIT:
		stmpw = *(ushort *) cmdbuf;
		*(ushort *) cmdbuf = __swab16 (stmpw);
		break;
	case FLASH_CFI_32BIT:
		stmpi = *(uint *) cmdbuf;
		*(uint *) cmdbuf = __swab32 (stmpi);
		break;
	default:
		puts ("WARNING: flash_make_cmd: unsuppported LittleEndian mode\n");
		break;
	}
#endif
}

/*
 * Write a proper sized command to the correct address
 */
static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
{

	volatile cfiptr_t addr;
	cfiword_t cword;

	addr.cp = flash_make_addr (info, sect, offset);
	flash_make_cmd (info, cmd, &cword);
	switch (info->portwidth) {
	case FLASH_CFI_8BIT:
		debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr.cp, cmd,
		       cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
		*addr.cp = cword.c;
		break;
	case FLASH_CFI_16BIT:
		debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr.wp,
		       cmd, cword.w,
		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
		*addr.wp = cword.w;
		break;
	case FLASH_CFI_32BIT:
		debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr.lp,
		       cmd, cword.l,
		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
		*addr.lp = cword.l;
		break;
	case FLASH_CFI_64BIT:
#ifdef DEBUG
		{