diff --git a/driver-bitfury.c b/driver-bitfury.c
index f3686166..71524437 100644
--- a/driver-bitfury.c
+++ b/driver-bitfury.c
@@ -23,38 +23,25 @@ static void bitfury_empty_buffer(struct cgpu_info *bitfury)
 	int amount;
 
 	do {
-		usb_read_ii_once(bitfury, 1, buf, 512, &amount, C_BF1_FLUSH);
-	} while (amount);
-}
-
-static void bitfury_empty_intbuf(struct cgpu_info *bitfury)
-{
-	char buf[512];
-	int amount;
-
-	do {
-		usb_read_ii_once(bitfury, 0, buf, 512, &amount, C_BF1_IFLUSH);
+		usb_read_once(bitfury, buf, 512, &amount, C_BF1_FLUSH);
 	} while (amount);
 }
 
 static void bitfury_open(struct cgpu_info *bitfury)
 {
-	bitfury_empty_intbuf(bitfury);
 	bitfury_empty_buffer(bitfury);
 }
 
 static void bitfury_close(struct cgpu_info *bitfury)
 {
 	bitfury_empty_buffer(bitfury);
-	bitfury_empty_intbuf(bitfury);
-	bitfury_empty_buffer(bitfury);
 }
 
 static void bitfury_identify(struct cgpu_info *bitfury)
 {
 	int amount;
 
-	usb_write_ii(bitfury, 1, "L", 1, &amount, C_BF1_IDENTIFY);
+	usb_write(bitfury, "L", 1, &amount, C_BF1_IDENTIFY);
 }
 
 static bool bitfury_getinfo(struct cgpu_info *bitfury, struct bitfury_info *info)
@@ -62,13 +49,13 @@ static bool bitfury_getinfo(struct cgpu_info *bitfury, struct bitfury_info *info
 	int amount, err;
 	char buf[16];
 
-	err = usb_write_ii(bitfury, 1, "I", 1, &amount, C_BF1_REQINFO);
+	err = usb_write(bitfury, "I", 1, &amount, C_BF1_REQINFO);
 	if (err) {
 		applog(LOG_INFO, "%s %d: Failed to write REQINFO",
 		       bitfury->drv->name, bitfury->device_id);
 		return false;
 	}
-	err = usb_read_ii(bitfury, 1, buf, 14, &amount, C_BF1_GETINFO);
+	err = usb_read(bitfury, buf, 14, &amount, C_BF1_GETINFO);
 	if (err) {
 		applog(LOG_INFO, "%s %d: Failed to read GETINFO",
 		       bitfury->drv->name, bitfury->device_id);
@@ -94,13 +81,13 @@ static bool bitfury_reset(struct cgpu_info *bitfury)
 	int amount, err;
 	char buf[16];
 
-	err = usb_write_ii(bitfury, 1, "R", 1, &amount, C_BF1_REQRESET);
+	err = usb_write(bitfury, "R", 1, &amount, C_BF1_REQRESET);
 	if (err) {
 		applog(LOG_INFO, "%s %d: Failed to write REQRESET",
 		       bitfury->drv->name, bitfury->device_id);
 		return false;
 	}
-	err = usb_read_ii_timeout(bitfury, 1, buf, 7, &amount, BF1WAIT, C_BF1_GETRESET);
+	err = usb_read_timeout(bitfury, buf, 7, &amount, BF1WAIT, C_BF1_GETRESET);
 	if (err) {
 		applog(LOG_INFO, "%s %d: Failed to read GETRESET",
 		       bitfury->drv->name, bitfury->device_id);
@@ -227,7 +214,7 @@ static int64_t bitfury_scanhash(struct thr_info *thr, struct work *work,
 	cgtime(&tv_now);
 	ms_diff = 600 - ms_tdiff(&tv_now, &info->tv_start);
 	if (ms_diff > 0) {
-		usb_read_ii_timeout(bitfury, 1, info->buf, 512, &amount, ms_diff, C_BF1_GETRES);
+		usb_read_timeout(bitfury, info->buf, 512, &amount, ms_diff, C_BF1_GETRES);
 		info->tot += amount;
 	}
 
@@ -240,10 +227,10 @@ static int64_t bitfury_scanhash(struct thr_info *thr, struct work *work,
 	ms_diff = BF1WAIT - ms_tdiff(&tv_now, &info->tv_start);
 	if (unlikely(ms_diff < 10))
 		ms_diff = 10;
-	usb_read_ii_once_timeout(bitfury, 1, info->buf + info->tot, 7, &amount, ms_diff, C_BF1_GETRES);
+	usb_read_once_timeout(bitfury, info->buf + info->tot, 7, &amount, ms_diff, C_BF1_GETRES);
 	info->tot += amount;
 	while (amount) {
-		usb_read_ii_once_timeout(bitfury, 1, info->buf + info->tot, 512, &amount, 10, C_BF1_GETRES);
+		usb_read_once_timeout(bitfury, info->buf + info->tot, 512, &amount, 10, C_BF1_GETRES);
 		info->tot += amount;
 	};
 
@@ -251,10 +238,10 @@ static int64_t bitfury_scanhash(struct thr_info *thr, struct work *work,
 		goto cascade;
 
 	/* Send work */
-	usb_write_ii(bitfury, 1, buf, 45, &amount, C_BF1_REQWORK);
+	usb_write(bitfury, buf, 45, &amount, C_BF1_REQWORK);
 	cgtime(&info->tv_start);
 	/* Get response acknowledging work */
-	usb_read_ii(bitfury, 1, buf, 7, &amount, C_BF1_GETWORK);
+	usb_read(bitfury, buf, 7, &amount, C_BF1_GETWORK);
 
 	/* Only happens on startup */
 	if (unlikely(!info->prevwork[BF1ARRAY_SIZE]))
diff --git a/usbutils.c b/usbutils.c
index 3b324821..4bd71179 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -140,9 +140,10 @@ static struct usb_epinfo bfu1_epinfos[] = {
 	{ LIBUSB_TRANSFER_TYPE_BULK,	16,	EPO(4), 0, 16, 0 }
 };
 
+/* Default to interface 1 */
 static struct usb_intinfo bfu_ints[] = {
-	USB_EPS(0,  bfu0_epinfos),
-	USB_EPS(1,  bfu1_epinfos)
+	USB_EPS(1,  bfu1_epinfos),
+	USB_EPS(0,  bfu0_epinfos)
 };
 #endif