diff --git a/board/walnut405/flash.c b/board/walnut405/flash.c
index c9c7cbf..462c09e 100644
--- a/board/walnut405/flash.c
+++ b/board/walnut405/flash.c
@@ -66,8 +66,8 @@
 {
 	unsigned long size_b0, size_b1;
 	int i;
-        uint pbcr;
-        unsigned long base_b0, base_b1;
+	uint pbcr;
+	unsigned long base_b0, base_b1;
 
 	/* Init: no FLASHes known */
 	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
@@ -165,7 +165,6 @@
 }
 
 
-
 /*-----------------------------------------------------------------------
  */
 static void flash_get_offsets (ulong base, flash_info_t *info)
@@ -173,11 +172,11 @@
 	int i;
 
 	/* set up sector start address table */
-        if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
+	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 	    (info->flash_id  == FLASH_AM040)){
 	    for (i = 0; i < info->sector_count; i++)
 		info->start[i] = base + (i * 0x00010000);
-        } else {
+	} else {
 	    if (info->flash_id & FLASH_BTYPE) {
 		/* set sector offsets for bottom boot block type	*/
 		info->start[0] = base + 0x00000000;
@@ -205,10 +204,10 @@
 void flash_print_info  (flash_info_t *info)
 {
 	int i;
-        int k;
-        int size;
-        int erased;
-        volatile unsigned long *flash;
+	int k;
+	int size;
+	int erased;
+	volatile unsigned long *flash;
 
 	if (info->flash_id == FLASH_UNKNOWN) {
 		printf ("missing or unknown FLASH type\n");
@@ -254,24 +253,24 @@
 
 	printf ("  Sector Start Addresses:");
 	for (i=0; i<info->sector_count; ++i) {
-                /*
-                 * 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;
-                      }
-                  }
+		/*
+		 * 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   ");
@@ -306,7 +305,7 @@
 	short i;
 	FLASH_WORD_SIZE value;
 	ulong base = (ulong)addr;
-        volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
+	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 
 	/* Write auto select command: read Manufacturer ID */
 	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
@@ -338,14 +337,14 @@
 
 #ifdef CONFIG_ADCIOP
 	value = addr2[0];			/* device ID		*/
-        /*        printf("\ndev_code=%x\n", value); */
+	/*        printf("\ndev_code=%x\n", value); */
 #else
 	value = addr2[1];			/* device ID		*/
 #endif
 
 	switch (value) {
 	case (FLASH_WORD_SIZE)AMD_ID_F040B:
-	        info->flash_id += FLASH_AM040;
+		info->flash_id += FLASH_AM040;
 		info->sector_count = 8;
 		info->size = 0x0080000; /* => 512 ko */
 		break;
@@ -416,11 +415,11 @@
 	}
 
 	/* set up sector start address table */
-        if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
+	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 	    (info->flash_id  == FLASH_AM040)){
 	    for (i = 0; i < info->sector_count; i++)
 		info->start[i] = base + (i * 0x00010000);
-        } else {
+	} else {
 	    if (info->flash_id & FLASH_BTYPE) {
 		/* set sector offsets for bottom boot block type	*/
 		info->start[0] = base + 0x00000000;
@@ -451,10 +450,10 @@
 		info->protect[i] = addr2[4] & 1;
 #else
 		addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
-                if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
-                  info->protect[i] = 0;
-                else
-                  info->protect[i] = addr2[2] & 1;
+		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
+		  info->protect[i] = 0;
+		else
+		  info->protect[i] = addr2[2] & 1;
 #endif
 	}
 
@@ -465,9 +464,9 @@
 #if 0 /* test-only */
 #ifdef CONFIG_ADCIOP
 		addr2 = (volatile unsigned char *)info->start[0];
-                addr2[ADDR0] = 0xAA;
-                addr2[ADDR1] = 0x55;
-                addr2[ADDR0] = 0xF0;  /* reset bank */
+		addr2[ADDR0] = 0xAA;
+		addr2[ADDR1] = 0x55;
+		addr2[ADDR0] = 0xF0;  /* reset bank */
 #else
 		addr2 = (FLASH_WORD_SIZE *)info->start[0];
 		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
@@ -489,15 +488,15 @@
 	start = get_timer (0);
     last  = start;
     while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
-        if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
-            printf ("Timeout\n");
-            return -1;
-        }
-        /* show that we're waiting */
-        if ((now - last) > 1000) {  /* every second */
-            putc ('.');
-            last = now;
-        }
+	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+	    printf ("Timeout\n");
+	    return -1;
+	}
+	/* show that we're waiting */
+	if ((now - last) > 1000) {  /* every second */
+	    putc ('.');
+	    last = now;
+	}
     }
 	return 0;
 }