diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index c2d2a20..8b332dd 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -19,7 +19,7 @@
 
 
 /* #undef	DEBUG */
-/* #undef	VERBOSE */
+/* #undef	VERBOSE_DEBUG */
 
 #if defined(CONFIG_USB_LANGWELL_OTG)
 #define	OTG_TRANSCEIVER
@@ -77,141 +77,110 @@
 /*-------------------------------------------------------------------------*/
 /* debugging */
 
-#ifdef	DEBUG
-#define	DBG(dev, fmt, args...) \
-	pr_debug("%s %s: " fmt , driver_name, \
-			pci_name(dev->pdev), ## args)
-#else
-#define	DBG(dev, fmt, args...) \
-	do { } while (0)
-#endif /* DEBUG */
-
-
-#ifdef	VERBOSE
-#define	VDBG DBG
-#else
-#define	VDBG(dev, fmt, args...) \
-	do { } while (0)
-#endif	/* VERBOSE */
-
-
-#define	ERROR(dev, fmt, args...) \
-	pr_err("%s %s: " fmt , driver_name, \
-			pci_name(dev->pdev), ## args)
-
-#define	WARNING(dev, fmt, args...) \
-	pr_warning("%s %s: " fmt , driver_name, \
-			pci_name(dev->pdev), ## args)
-
-#define	INFO(dev, fmt, args...) \
-	pr_info("%s %s: " fmt , driver_name, \
-			pci_name(dev->pdev), ## args)
-
-
-#ifdef	VERBOSE
+#ifdef	VERBOSE_DEBUG
 static inline void print_all_registers(struct langwell_udc *dev)
 {
 	int	i;
 
 	/* Capability Registers */
-	printk(KERN_DEBUG "Capability Registers (offset: "
-			"0x%04x, length: 0x%08x)\n",
-			CAP_REG_OFFSET,
-			(u32)sizeof(struct langwell_cap_regs));
-	printk(KERN_DEBUG "caplength=0x%02x\n",
+	dev_dbg(&dev->pdev->dev,
+		"Capability Registers (offset: 0x%04x, length: 0x%08x)\n",
+		CAP_REG_OFFSET, (u32)sizeof(struct langwell_cap_regs));
+	dev_dbg(&dev->pdev->dev, "caplength=0x%02x\n",
 			readb(&dev->cap_regs->caplength));
-	printk(KERN_DEBUG "hciversion=0x%04x\n",
+	dev_dbg(&dev->pdev->dev, "hciversion=0x%04x\n",
 			readw(&dev->cap_regs->hciversion));
-	printk(KERN_DEBUG "hcsparams=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "hcsparams=0x%08x\n",
 			readl(&dev->cap_regs->hcsparams));
-	printk(KERN_DEBUG "hccparams=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "hccparams=0x%08x\n",
 			readl(&dev->cap_regs->hccparams));
-	printk(KERN_DEBUG "dciversion=0x%04x\n",
+	dev_dbg(&dev->pdev->dev, "dciversion=0x%04x\n",
 			readw(&dev->cap_regs->dciversion));
-	printk(KERN_DEBUG "dccparams=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "dccparams=0x%08x\n",
 			readl(&dev->cap_regs->dccparams));
 
 	/* Operational Registers */
-	printk(KERN_DEBUG "Operational Registers (offset: "
-			"0x%04x, length: 0x%08x)\n",
-			OP_REG_OFFSET,
-			(u32)sizeof(struct langwell_op_regs));
-	printk(KERN_DEBUG "extsts=0x%08x\n",
+	dev_dbg(&dev->pdev->dev,
+		"Operational Registers (offset: 0x%04x, length: 0x%08x)\n",
+		OP_REG_OFFSET, (u32)sizeof(struct langwell_op_regs));
+	dev_dbg(&dev->pdev->dev, "extsts=0x%08x\n",
 			readl(&dev->op_regs->extsts));
-	printk(KERN_DEBUG "extintr=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "extintr=0x%08x\n",
 			readl(&dev->op_regs->extintr));
-	printk(KERN_DEBUG "usbcmd=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "usbcmd=0x%08x\n",
 			readl(&dev->op_regs->usbcmd));
-	printk(KERN_DEBUG "usbsts=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "usbsts=0x%08x\n",
 			readl(&dev->op_regs->usbsts));
-	printk(KERN_DEBUG "usbintr=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "usbintr=0x%08x\n",
 			readl(&dev->op_regs->usbintr));
-	printk(KERN_DEBUG "frindex=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "frindex=0x%08x\n",
 			readl(&dev->op_regs->frindex));
-	printk(KERN_DEBUG "ctrldssegment=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "ctrldssegment=0x%08x\n",
 			readl(&dev->op_regs->ctrldssegment));
-	printk(KERN_DEBUG "deviceaddr=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "deviceaddr=0x%08x\n",
 			readl(&dev->op_regs->deviceaddr));
-	printk(KERN_DEBUG "endpointlistaddr=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endpointlistaddr=0x%08x\n",
 			readl(&dev->op_regs->endpointlistaddr));
-	printk(KERN_DEBUG "ttctrl=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "ttctrl=0x%08x\n",
 			readl(&dev->op_regs->ttctrl));
-	printk(KERN_DEBUG "burstsize=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "burstsize=0x%08x\n",
 			readl(&dev->op_regs->burstsize));
-	printk(KERN_DEBUG "txfilltuning=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "txfilltuning=0x%08x\n",
 			readl(&dev->op_regs->txfilltuning));
-	printk(KERN_DEBUG "txttfilltuning=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "txttfilltuning=0x%08x\n",
 			readl(&dev->op_regs->txttfilltuning));
-	printk(KERN_DEBUG "ic_usb=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "ic_usb=0x%08x\n",
 			readl(&dev->op_regs->ic_usb));
-	printk(KERN_DEBUG "ulpi_viewport=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "ulpi_viewport=0x%08x\n",
 			readl(&dev->op_regs->ulpi_viewport));
-	printk(KERN_DEBUG "configflag=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "configflag=0x%08x\n",
 			readl(&dev->op_regs->configflag));
-	printk(KERN_DEBUG "portsc1=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "portsc1=0x%08x\n",
 			readl(&dev->op_regs->portsc1));
-	printk(KERN_DEBUG "devlc=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "devlc=0x%08x\n",
 			readl(&dev->op_regs->devlc));
-	printk(KERN_DEBUG "otgsc=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "otgsc=0x%08x\n",
 			readl(&dev->op_regs->otgsc));
-	printk(KERN_DEBUG "usbmode=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "usbmode=0x%08x\n",
 			readl(&dev->op_regs->usbmode));
-	printk(KERN_DEBUG "endptnak=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptnak=0x%08x\n",
 			readl(&dev->op_regs->endptnak));
-	printk(KERN_DEBUG "endptnaken=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptnaken=0x%08x\n",
 			readl(&dev->op_regs->endptnaken));
-	printk(KERN_DEBUG "endptsetupstat=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptsetupstat=0x%08x\n",
 			readl(&dev->op_regs->endptsetupstat));
-	printk(KERN_DEBUG "endptprime=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptprime=0x%08x\n",
 			readl(&dev->op_regs->endptprime));
-	printk(KERN_DEBUG "endptflush=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptflush=0x%08x\n",
 			readl(&dev->op_regs->endptflush));
-	printk(KERN_DEBUG "endptstat=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptstat=0x%08x\n",
 			readl(&dev->op_regs->endptstat));
-	printk(KERN_DEBUG "endptcomplete=0x%08x\n",
+	dev_dbg(&dev->pdev->dev, "endptcomplete=0x%08x\n",
 			readl(&dev->op_regs->endptcomplete));
 
 	for (i = 0; i < dev->ep_max / 2; i++) {
-		printk(KERN_DEBUG "endptctrl[%d]=0x%08x\n",
+		dev_dbg(&dev->pdev->dev, "endptctrl[%d]=0x%08x\n",
 				i, readl(&dev->op_regs->endptctrl[i]));
 	}
 }
-#endif /* VERBOSE */
+#else
+
+#define	print_all_registers(dev)	do { } while (0)
+
+#endif /* VERBOSE_DEBUG */
 
 
 /*-------------------------------------------------------------------------*/
 
-#define	DIR_STRING(bAddress)	(((bAddress) & USB_DIR_IN) ? "in" : "out")
+#define	is_in(ep)	(((ep)->ep_num == 0) ? ((ep)->dev->ep0_dir ==	\
+			USB_DIR_IN) : (usb_endpoint_dir_in((ep)->desc)))
 
-#define is_in(ep)	(((ep)->ep_num == 0) ? ((ep)->dev->ep0_dir == \
-			USB_DIR_IN) : ((ep)->desc->bEndpointAddress \
-			& USB_DIR_IN) == USB_DIR_IN)
+#define	DIR_STRING(ep)	(is_in(ep) ? "in" : "out")
 
 
-#ifdef	DEBUG
-static char *type_string(u8 bmAttributes)
+static char *type_string(const struct usb_endpoint_descriptor *desc)
 {
-	switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
+	switch (usb_endpoint_type(desc)) {
 	case USB_ENDPOINT_XFER_BULK:
 		return "bulk";
 	case USB_ENDPOINT_XFER_ISOC:
@@ -222,7 +191,6 @@
 
 	return "control";
 }
-#endif
 
 
 /* configure endpoint control registers */
@@ -233,7 +201,7 @@
 	u32			endptctrl;
 
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	endptctrl = readl(&dev->op_regs->endptctrl[ep_num]);
 	if (is_in) {	/* TX */
@@ -250,7 +218,7 @@
 
 	writel(endptctrl, &dev->op_regs->endptctrl[ep_num]);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -260,7 +228,7 @@
 	struct langwell_ep	*ep;
 	int			i;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* ep0 in and out */
 	for (i = 0; i < 2; i++) {
@@ -283,7 +251,7 @@
 		ep_reset(&dev->ep[0], 0, i, USB_ENDPOINT_XFER_CONTROL);
 	}
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 }
 
@@ -305,7 +273,7 @@
 
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !desc || ep->desc
 			|| desc->bDescriptorType != USB_DT_ENDPOINT)
@@ -326,7 +294,7 @@
 	 * sanity check type, direction, address, and then
 	 * initialize the endpoint capabilities fields in dQH
 	 */
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+	switch (usb_endpoint_type(desc)) {
 	case USB_ENDPOINT_XFER_CONTROL:
 		ios = 1;
 		break;
@@ -395,24 +363,24 @@
 	ep->ep.maxpacket = max;
 	ep->desc = desc;
 	ep->stopped = 0;
-	ep->ep_num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+	ep->ep_num = usb_endpoint_num(desc);
 
 	/* ep_type */
-	ep->ep_type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+	ep->ep_type = usb_endpoint_type(desc);
 
 	/* configure endpoint control registers */
 	ep_reset(ep, ep->ep_num, is_in(ep), ep->ep_type);
 
-	DBG(dev, "enabled %s (ep%d%s-%s), max %04x\n",
+	dev_dbg(&dev->pdev->dev, "enabled %s (ep%d%s-%s), max %04x\n",
 			_ep->name,
 			ep->ep_num,
-			DIR_STRING(desc->bEndpointAddress),
-			type_string(desc->bmAttributes),
+			DIR_STRING(ep),
+			type_string(desc),
 			max);
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 done:
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 
@@ -428,7 +396,7 @@
 	struct langwell_dtd	*curr_dtd, *next_dtd;
 	int			i;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* remove the req from ep->queue */
 	list_del_init(&req->queue);
@@ -448,7 +416,8 @@
 	}
 
 	if (req->mapped) {
-		dma_unmap_single(&dev->pdev->dev, req->req.dma, req->req.length,
+		dma_unmap_single(&dev->pdev->dev,
+			req->req.dma, req->req.length,
 			is_in(ep) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
 		req->req.dma = DMA_ADDR_INVALID;
 		req->mapped = 0;
@@ -458,9 +427,10 @@
 				is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
 	if (status != -ESHUTDOWN)
-		DBG(dev, "complete %s, req %p, stat %d, len %u/%u\n",
-			ep->ep.name, &req->req, status,
-			req->req.actual, req->req.length);
+		dev_dbg(&dev->pdev->dev,
+				"complete %s, req %p, stat %d, len %u/%u\n",
+				ep->ep.name, &req->req, status,
+				req->req.actual, req->req.length);
 
 	/* don't modify queue heads during completion callback */
 	ep->stopped = 1;
@@ -473,7 +443,7 @@
 	spin_lock(&dev->lock);
 	ep->stopped = stopped;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -511,7 +481,7 @@
 
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !ep->desc)
 		return -EINVAL;
@@ -535,8 +505,8 @@
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	DBG(dev, "disabled %s\n", _ep->name);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "disabled %s\n", _ep->name);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 
 	return 0;
 }
@@ -555,7 +525,7 @@
 
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	req = kzalloc(sizeof(*req), gfp_flags);
 	if (!req)
@@ -564,8 +534,8 @@
 	req->req.dma = DMA_ADDR_INVALID;
 	INIT_LIST_HEAD(&req->queue);
 
-	VDBG(dev, "alloc request for %s\n", _ep->name);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "alloc request for %s\n", _ep->name);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return &req->req;
 }
 
@@ -580,7 +550,7 @@
 
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !_req)
 		return;
@@ -591,8 +561,8 @@
 	if (_req)
 		kfree(req);
 
-	VDBG(dev, "free request for %s\n", _ep->name);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "free request for %s\n", _ep->name);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -608,23 +578,24 @@
 	struct langwell_udc	*dev;
 
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	i = ep->ep_num * 2 + is_in(ep);
 	dqh = &dev->ep_dqh[i];
 
 	if (ep->ep_num)
-		VDBG(dev, "%s\n", ep->name);
+		dev_vdbg(&dev->pdev->dev, "%s\n", ep->name);
 	else
 		/* ep0 */
-		VDBG(dev, "%s-%s\n", ep->name, is_in(ep) ? "in" : "out");
+		dev_vdbg(&dev->pdev->dev, "%s-%s\n", ep->name, DIR_STRING(ep));
 
-	VDBG(dev, "ep_dqh[%d] addr: 0x%08x\n", i, (u32)&(dev->ep_dqh[i]));
+	dev_vdbg(&dev->pdev->dev, "ep_dqh[%d] addr: 0x%08x\n",
+			i, (u32)&(dev->ep_dqh[i]));
 
 	bit_mask = is_in(ep) ?
 		(1 << (ep->ep_num + 16)) : (1 << (ep->ep_num));
 
-	VDBG(dev, "bit_mask = 0x%08x\n", bit_mask);
+	dev_vdbg(&dev->pdev->dev, "bit_mask = 0x%08x\n", bit_mask);
 
 	/* check if the pipe is empty */
 	if (!(list_empty(&ep->queue))) {
@@ -665,14 +636,17 @@
 	/* clear active and halt bit */
 	dtd_status = (u8) ~(DTD_STS_ACTIVE | DTD_STS_HALTED);
 	dqh->dtd_status &= dtd_status;
-	VDBG(dev, "dqh->dtd_status = 0x%x\n", dqh->dtd_status);
+	dev_vdbg(&dev->pdev->dev, "dqh->dtd_status = 0x%x\n", dqh->dtd_status);
+
+	/* ensure that updates to the dQH will occure before priming */
+	wmb();
 
 	/* write 1 to endptprime register to PRIME endpoint */
 	bit_mask = is_in(ep) ? (1 << (ep->ep_num + 16)) : (1 << ep->ep_num);
-	VDBG(dev, "endprime bit_mask = 0x%08x\n", bit_mask);
+	dev_vdbg(&dev->pdev->dev, "endprime bit_mask = 0x%08x\n", bit_mask);
 	writel(bit_mask, &dev->op_regs->endptprime);
 out:
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -687,7 +661,7 @@
 	int			i;
 
 	dev = req->ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* the maximum transfer length, up to 16k bytes */
 	*length = min(req->req.length - req->req.actual,
@@ -708,7 +682,7 @@
 
 	/* fill in total bytes with transfer size */
 	dtd->dtd_total = cpu_to_le16(*length);
-	VDBG(dev, "dtd->dtd_total = %d\n", dtd->dtd_total);
+	dev_vdbg(&dev->pdev->dev, "dtd->dtd_total = %d\n", dtd->dtd_total);
 
 	/* set is_last flag if req->req.zero is set or not */
 	if (req->req.zero) {
@@ -722,7 +696,7 @@
 		*is_last = 0;
 
 	if (*is_last == 0)
-		VDBG(dev, "multi-dtd request!\n");
+		dev_vdbg(&dev->pdev->dev, "multi-dtd request!\n");
 
 	/* set interrupt on complete bit for the last dTD */
 	if (*is_last && !req->req.no_interrupt)
@@ -733,10 +707,12 @@
 
 	/* set the active bit of status field to 1 */
 	dtd->dtd_status = DTD_STS_ACTIVE;
-	VDBG(dev, "dtd->dtd_status = 0x%02x\n", dtd->dtd_status);
+	dev_vdbg(&dev->pdev->dev, "dtd->dtd_status = 0x%02x\n",
+			dtd->dtd_status);
 
-	VDBG(dev, "length = %d, dma addr= 0x%08x\n", *length, (int)*dma);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "length = %d, dma addr= 0x%08x\n",
+			*length, (int)*dma);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return dtd;
 }
 
@@ -751,7 +727,7 @@
 	dma_addr_t		dma;
 
 	dev = req->ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 	do {
 		dtd = build_dtd(req, &count, &dma, &is_last);
 		if (dtd == NULL)
@@ -773,7 +749,7 @@
 
 	req->tail = dtd;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -803,9 +779,9 @@
 
 	dev = ep->dev;
 	req->ep = ep;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+	if (usb_endpoint_xfer_isoc(ep->desc)) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
 		is_iso = 1;
@@ -818,7 +794,7 @@
 	if (_req->dma == DMA_ADDR_INVALID) {
 		/* WORKAROUND: WARN_ON(size == 0) */
 		if (_req->length == 0) {
-			VDBG(dev, "req->length: 0->1\n");
+			dev_vdbg(&dev->pdev->dev, "req->length: 0->1\n");
 			zlflag = 1;
 			_req->length++;
 		}
@@ -827,24 +803,25 @@
 				_req->buf, _req->length,
 				is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 		if (zlflag && (_req->length == 1)) {
-			VDBG(dev, "req->length: 1->0\n");
+			dev_vdbg(&dev->pdev->dev, "req->length: 1->0\n");
 			zlflag = 0;
 			_req->length = 0;
 		}
 
 		req->mapped = 1;
-		VDBG(dev, "req->mapped = 1\n");
+		dev_vdbg(&dev->pdev->dev, "req->mapped = 1\n");
 	} else {
 		dma_sync_single_for_device(&dev->pdev->dev,
 				_req->dma, _req->length,
 				is_in(ep) ?  DMA_TO_DEVICE : DMA_FROM_DEVICE);
 		req->mapped = 0;
-		VDBG(dev, "req->mapped = 0\n");
+		dev_vdbg(&dev->pdev->dev, "req->mapped = 0\n");
 	}
 
-	DBG(dev, "%s queue req %p, len %u, buf %p, dma 0x%08llx\n",
-	    _ep->name,
-	    _req, _req->length, _req->buf, (unsigned long long)_req->dma);
+	dev_dbg(&dev->pdev->dev,
+			"%s queue req %p, len %u, buf %p, dma 0x%08x\n",
+			_ep->name,
+			_req, _req->length, _req->buf, (int)_req->dma);
 
 	_req->status = -EINPROGRESS;
 	_req->actual = 0;
@@ -866,12 +843,12 @@
 
 	if (likely(req != NULL)) {
 		list_add_tail(&req->queue, &ep->queue);
-		VDBG(dev, "list_add_tail() \n");
+		dev_vdbg(&dev->pdev->dev, "list_add_tail()\n");
 	}
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -888,7 +865,7 @@
 
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !ep->desc || !_req)
 		return -EINVAL;
@@ -924,7 +901,7 @@
 
 	/* queue head may be partially complete. */
 	if (ep->queue.next == &req->queue) {
-		DBG(dev, "unlink (%s) dma\n", _ep->name);
+		dev_dbg(&dev->pdev->dev, "unlink (%s) dma\n", _ep->name);
 		_req->status = -ECONNRESET;
 		langwell_ep_fifo_flush(&ep->ep);
 
@@ -963,7 +940,7 @@
 	ep->stopped = stopped;
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 
@@ -976,7 +953,7 @@
 	u32			endptctrl = 0;
 	int			ep_num;
 	struct langwell_udc	*dev = ep->dev;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	ep_num = ep->ep_num;
 	endptctrl = readl(&dev->op_regs->endptctrl[ep_num]);
@@ -1001,7 +978,7 @@
 
 	writel(endptctrl, &dev->op_regs->endptctrl[ep_num]);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -1016,7 +993,7 @@
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !ep->desc)
 		return -EINVAL;
@@ -1024,8 +1001,7 @@
 	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
 
-	if (ep->desc && (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
-			== USB_ENDPOINT_XFER_ISOC)
+	if (usb_endpoint_xfer_isoc(ep->desc))
 		return  -EOPNOTSUPP;
 
 	spin_lock_irqsave(&dev->lock, flags);
@@ -1036,7 +1012,7 @@
 	 */
 	if (!list_empty(&ep->queue) && is_in(ep) && value) {
 		/* IN endpoint FIFO holds bytes */
-		DBG(dev, "%s FIFO holds bytes\n", _ep->name);
+		dev_dbg(&dev->pdev->dev, "%s FIFO holds bytes\n", _ep->name);
 		retval = -EAGAIN;
 		goto done;
 	}
@@ -1050,8 +1026,9 @@
 	}
 done:
 	spin_unlock_irqrestore(&dev->lock, flags);
-	DBG(dev, "%s %s halt\n", _ep->name, value ? "set" : "clear");
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "%s %s halt\n",
+			_ep->name, value ? "set" : "clear");
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 
@@ -1065,12 +1042,12 @@
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !ep->desc)
 		return -EINVAL;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return usb_ep_set_halt(_ep);
 }
 
@@ -1086,15 +1063,16 @@
 	ep = container_of(_ep, struct langwell_ep, ep);
 	dev = ep->dev;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (!_ep || !ep->desc) {
-		VDBG(dev, "ep or ep->desc is NULL\n");
-		VDBG(dev, "<--- %s()\n", __func__);
+		dev_vdbg(&dev->pdev->dev, "ep or ep->desc is NULL\n");
+		dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		return;
 	}
 
-	VDBG(dev, "%s-%s fifo flush\n", _ep->name, is_in(ep) ? "in" : "out");
+	dev_vdbg(&dev->pdev->dev, "%s-%s fifo flush\n",
+			_ep->name, DIR_STRING(ep));
 
 	/* flush endpoint buffer */
 	if (ep->ep_num == 0)
@@ -1110,14 +1088,14 @@
 		writel(flush_bit, &dev->op_regs->endptflush);
 		while (readl(&dev->op_regs->endptflush)) {
 			if (time_after(jiffies, timeout)) {
-				ERROR(dev, "ep flush timeout\n");
+				dev_err(&dev->pdev->dev, "ep flush timeout\n");
 				goto done;
 			}
 			cpu_relax();
 		}
 	} while (readl(&dev->op_regs->endptstat) & flush_bit);
 done:
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -1167,11 +1145,11 @@
 		return -ENODEV;
 
 	dev = container_of(_gadget, struct langwell_udc, gadget);
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	retval = readl(&dev->op_regs->frindex) & FRINDEX_MASK;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 
@@ -1180,18 +1158,20 @@
 static int langwell_wakeup(struct usb_gadget *_gadget)
 {
 	struct langwell_udc	*dev;
-	u32 			portsc1, devlc;
-	unsigned long   	flags;
+	u32			portsc1, devlc;
+	unsigned long		flags;
 
 	if (!_gadget)
 		return 0;
 
 	dev = container_of(_gadget, struct langwell_udc, gadget);
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	/* Remote Wakeup feature not enabled by host */
-	if (!dev->remote_wakeup)
+	/* remote wakeup feature not enabled by host */
+	if (!dev->remote_wakeup) {
+		dev_info(&dev->pdev->dev, "remote wakeup is disabled\n");
 		return -ENOTSUPP;
+	}
 
 	spin_lock_irqsave(&dev->lock, flags);
 
@@ -1215,13 +1195,12 @@
 
 	/* exit PHY low power suspend */
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "devlc = 0x%08x\n", devlc);
 	devlc &= ~LPM_PHCD;
 	writel(devlc, &dev->op_regs->devlc);
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -1231,16 +1210,17 @@
 {
 	struct langwell_udc	*dev;
 	unsigned long		flags;
-	u32             	usbcmd;
+	u32			usbcmd;
 
 	if (!_gadget)
 		return -ENODEV;
 
 	dev = container_of(_gadget, struct langwell_udc, gadget);
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	spin_lock_irqsave(&dev->lock, flags);
-	VDBG(dev, "VBUS status: %s\n", is_active ? "on" : "off");
+	dev_vdbg(&dev->pdev->dev, "VBUS status: %s\n",
+			is_active ? "on" : "off");
 
 	dev->vbus_active = (is_active != 0);
 	if (dev->driver && dev->softconnected && dev->vbus_active) {
@@ -1255,7 +1235,7 @@
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -1269,15 +1249,15 @@
 		return -ENODEV;
 
 	dev = container_of(_gadget, struct langwell_udc, gadget);
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dev->transceiver) {
-		VDBG(dev, "otg_set_power\n");
-		VDBG(dev, "<--- %s()\n", __func__);
+		dev_vdbg(&dev->pdev->dev, "otg_set_power\n");
+		dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		return otg_set_power(dev->transceiver, mA);
 	}
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return -ENOTSUPP;
 }
 
@@ -1286,15 +1266,15 @@
 static int langwell_pullup(struct usb_gadget *_gadget, int is_on)
 {
 	struct langwell_udc	*dev;
-	u32             	usbcmd;
-	unsigned long   	flags;
+	u32			usbcmd;
+	unsigned long		flags;
 
 	if (!_gadget)
 		return -ENODEV;
 
 	dev = container_of(_gadget, struct langwell_udc, gadget);
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	spin_lock_irqsave(&dev->lock, flags);
 	dev->softconnected = (is_on != 0);
@@ -1310,7 +1290,7 @@
 	}
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -1351,7 +1331,7 @@
 	if (!dev)
 		return -EINVAL;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* set controller to stop state */
 	usbcmd = readl(&dev->op_regs->usbcmd);
@@ -1367,7 +1347,7 @@
 	timeout = jiffies + RESET_TIMEOUT;
 	while (readl(&dev->op_regs->usbcmd) & CMD_RST) {
 		if (time_after(jiffies, timeout)) {
-			ERROR(dev, "device reset timeout\n");
+			dev_err(&dev->pdev->dev, "device reset timeout\n");
 			return -ETIMEDOUT;
 		}
 		cpu_relax();
@@ -1382,7 +1362,7 @@
 
 	writel(usbmode, &dev->op_regs->usbmode);
 	usbmode = readl(&dev->op_regs->usbmode);
-	VDBG(dev, "usbmode=0x%08x\n", usbmode);
+	dev_vdbg(&dev->pdev->dev, "usbmode=0x%08x\n", usbmode);
 
 	/* Write-Clear setup status */
 	writel(0, &dev->op_regs->usbsts);
@@ -1400,10 +1380,11 @@
 	endpointlistaddr &= ENDPOINTLISTADDR_MASK;
 	writel(endpointlistaddr, &dev->op_regs->endpointlistaddr);
 
-	VDBG(dev, "dQH base (vir: %p, phy: 0x%08x), endpointlistaddr=0x%08x\n",
-			dev->ep_dqh, endpointlistaddr,
-			readl(&dev->op_regs->endpointlistaddr));
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev,
+		"dQH base (vir: %p, phy: 0x%08x), endpointlistaddr=0x%08x\n",
+		dev->ep_dqh, endpointlistaddr,
+		readl(&dev->op_regs->endpointlistaddr));
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -1415,7 +1396,7 @@
 	char			name[14];
 	int			i;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* initialize ep0 */
 	ep = &dev->ep[0];
@@ -1453,7 +1434,7 @@
 		ep->dqh = &dev->ep_dqh[i];
 	}
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -1462,7 +1443,7 @@
 static void langwell_udc_start(struct langwell_udc *dev)
 {
 	u32	usbintr, usbcmd;
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* enable interrupts */
 	usbintr = INTR_ULPIE	/* ULPI */
@@ -1485,7 +1466,7 @@
 	usbcmd |= CMD_RUNSTOP;
 	writel(usbcmd, &dev->op_regs->usbcmd);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 }
 
@@ -1495,7 +1476,7 @@
 {
 	u32	usbcmd;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* disable all interrupts */
 	writel(0, &dev->op_regs->usbintr);
@@ -1508,7 +1489,7 @@
 	usbcmd &= ~CMD_RUNSTOP;
 	writel(usbcmd, &dev->op_regs->usbcmd);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 }
 
@@ -1518,7 +1499,7 @@
 		struct usb_gadget_driver *driver)
 {
 	struct langwell_ep	*ep;
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	nuke(&dev->ep[0], -ESHUTDOWN);
 
@@ -1533,7 +1514,7 @@
 		spin_lock(&dev->lock);
 	}
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -1659,13 +1640,15 @@
 		"Over-current Change: %s\n"
 		"Port Enable/Disable Change: %s\n"
 		"Port Enabled/Disabled: %s\n"
-		"Current Connect Status: %s\n\n",
+		"Current Connect Status: %s\n"
+		"LPM Suspend Status: %s\n\n",
 		(tmp_reg & PORTS_PR) ? "Reset" : "Not Reset",
 		(tmp_reg & PORTS_SUSP) ? "Suspend " : "Not Suspend",
 		(tmp_reg & PORTS_OCC) ? "Detected" : "No",
 		(tmp_reg & PORTS_PEC) ? "Changed" : "Not Changed",
 		(tmp_reg & PORTS_PE) ? "Enable" : "Not Correct",
-		(tmp_reg & PORTS_CCS) ?  "Attached" : "Not Attached");
+		(tmp_reg & PORTS_CCS) ?  "Attached" : "Not Attached",
+		(tmp_reg & PORTS_SLP) ? "LPM L1" : "LPM L0");
 	size -= t;
 	next += t;
 
@@ -1676,7 +1659,7 @@
 		"Serial Transceiver : %d\n"
 		"Port Speed: %s\n"
 		"Port Force Full Speed Connenct: %s\n"
-		"PHY Low Power Suspend Clock Disable: %s\n"
+		"PHY Low Power Suspend Clock: %s\n"
 		"BmAttributes: %d\n\n",
 		LPM_PTS(tmp_reg),
 		(tmp_reg & LPM_STS) ? 1 : 0,
@@ -1816,7 +1799,7 @@
 	if (!dev)
 		return -ENODEV;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dev->driver)
 		return -EBUSY;
@@ -1832,7 +1815,7 @@
 
 	retval = driver->bind(&dev->gadget);
 	if (retval) {
-		DBG(dev, "bind to driver %s --> %d\n",
+		dev_dbg(&dev->pdev->dev, "bind to driver %s --> %d\n",
 				driver->driver.name, retval);
 		dev->driver = NULL;
 		dev->gadget.dev.driver = NULL;
@@ -1851,13 +1834,13 @@
 	if (dev->got_irq)
 		langwell_udc_start(dev);
 
-	VDBG(dev, "After langwell_udc_start(), print all registers:\n");
-#ifdef	VERBOSE
+	dev_vdbg(&dev->pdev->dev,
+			"After langwell_udc_start(), print all registers:\n");
 	print_all_registers(dev);
-#endif
 
-	INFO(dev, "register driver: %s\n", driver->driver.name);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_info(&dev->pdev->dev, "register driver: %s\n",
+			driver->driver.name);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 
 err_unbind:
@@ -1865,7 +1848,7 @@
 	dev->gadget.dev.driver = NULL;
 	dev->driver = NULL;
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 EXPORT_SYMBOL(usb_gadget_register_driver);
@@ -1880,7 +1863,7 @@
 	if (!dev)
 		return -ENODEV;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (unlikely(!driver || !driver->bind || !driver->unbind))
 		return -EINVAL;
@@ -1910,8 +1893,9 @@
 
 	device_remove_file(&dev->pdev->dev, &dev_attr_function);
 
-	INFO(dev, "unregistered driver '%s'\n", driver->driver.name);
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_info(&dev->pdev->dev, "unregistered driver '%s'\n",
+			driver->driver.name);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 EXPORT_SYMBOL(usb_gadget_unregister_driver);
@@ -1930,7 +1914,7 @@
 	unsigned long		timeout;
 	struct langwell_dqh	*dqh;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* ep0 OUT dQH */
 	dqh = &dev->ep_dqh[EP_DIR_OUT];
@@ -1943,7 +1927,7 @@
 	timeout = jiffies + SETUPSTAT_TIMEOUT;
 	while (readl(&dev->op_regs->endptsetupstat)) {
 		if (time_after(jiffies, timeout)) {
-			ERROR(dev, "setup_tripwire timeout\n");
+			dev_err(&dev->pdev->dev, "setup_tripwire timeout\n");
 			break;
 		}
 		cpu_relax();
@@ -1963,7 +1947,7 @@
 	usbcmd = readl(&dev->op_regs->usbcmd);
 	writel(usbcmd & ~CMD_SUTW, &dev->op_regs->usbcmd);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -1972,7 +1956,7 @@
 {
 	u32	endptctrl;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* set TX and RX to stall */
 	endptctrl = readl(&dev->op_regs->endptctrl[0]);
@@ -1983,7 +1967,7 @@
 	dev->ep0_state = WAIT_FOR_SETUP;
 	dev->ep0_dir = USB_DIR_OUT;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -1994,7 +1978,7 @@
 	struct langwell_ep	*ep;
 	int			status = 0;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dir == EP_DIR_IN)
 		dev->ep0_dir = USB_DIR_IN;
@@ -2019,11 +2003,11 @@
 		return -ENOMEM;
 
 	if (status)
-		ERROR(dev, "can't queue ep0 status request\n");
+		dev_err(&dev->pdev->dev, "can't queue ep0 status request\n");
 
 	list_add_tail(&req->queue, &ep->queue);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return status;
 }
 
@@ -2032,11 +2016,11 @@
 static void set_address(struct langwell_udc *dev, u16 value,
 		u16 index, u16 length)
 {
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* save the new address to device struct */
 	dev->dev_addr = (u8) value;
-	VDBG(dev, "dev->dev_addr = %d\n", dev->dev_addr);
+	dev_vdbg(&dev->pdev->dev, "dev->dev_addr = %d\n", dev->dev_addr);
 
 	/* update usb state */
 	dev->usb_state = USB_STATE_ADDRESS;
@@ -2045,7 +2029,7 @@
 	if (prime_status_phase(dev, EP_DIR_IN))
 		ep0_stall(dev);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2054,7 +2038,7 @@
 		u16 wIndex)
 {
 	struct langwell_ep		*ep;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
 		return &dev->ep[0];
@@ -2073,7 +2057,7 @@
 			return ep;
 	}
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return NULL;
 }
 
@@ -2085,7 +2069,7 @@
 	u32			endptctrl;
 	int			retval;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	endptctrl = readl(&dev->op_regs->endptctrl[ep->ep_num]);
 	if (is_in(ep))
@@ -2093,7 +2077,7 @@
 	else
 		retval = endptctrl & EPCTRL_RXS ? 1 : 0;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return retval;
 }
 
@@ -2107,7 +2091,7 @@
 	u16	status_data = 0;	/* 16 bits cpu view status data */
 	int	status = 0;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	ep = &dev->ep[0];
 
@@ -2129,6 +2113,8 @@
 		status_data = ep_is_stall(epn) << USB_ENDPOINT_HALT;
 	}
 
+	dev_dbg(&dev->pdev->dev, "get status data: 0x%04x\n", status_data);
+
 	dev->ep0_dir = USB_DIR_IN;
 
 	/* borrow the per device status_req */
@@ -2150,18 +2136,19 @@
 		goto stall;
 
 	if (status) {
-		ERROR(dev, "response error on GET_STATUS request\n");
+		dev_err(&dev->pdev->dev,
+				"response error on GET_STATUS request\n");
 		goto stall;
 	}
 
 	list_add_tail(&req->queue, &ep->queue);
 	dev->ep0_state = DATA_STATE_XMIT;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 stall:
 	ep0_stall(dev);
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2173,12 +2160,12 @@
 	u16	wIndex = le16_to_cpu(setup->wIndex);
 	u16	wLength = le16_to_cpu(setup->wLength);
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* ep0 fifo flush */
 	nuke(&dev->ep[0], -ESHUTDOWN);
 
-	DBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
+	dev_dbg(&dev->pdev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
 			setup->bRequestType, setup->bRequest,
 			wValue, wIndex, wLength);
 
@@ -2197,7 +2184,7 @@
 	/* We process some stardard setup requests here */
 	switch (setup->bRequest) {
 	case USB_REQ_GET_STATUS:
-		DBG(dev, "SETUP: USB_REQ_GET_STATUS\n");
+		dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_GET_STATUS\n");
 		/* get status, DATA and STATUS phase */
 		if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
 					!= (USB_DIR_IN | USB_TYPE_STANDARD))
@@ -2206,7 +2193,7 @@
 		goto end;
 
 	case USB_REQ_SET_ADDRESS:
-		DBG(dev, "SETUP: USB_REQ_SET_ADDRESS\n");
+		dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_SET_ADDRESS\n");
 		/* STATUS phase */
 		if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
 						| USB_RECIP_DEVICE))
@@ -2220,9 +2207,11 @@
 	{
 		int rc = -EOPNOTSUPP;
 		if (setup->bRequest == USB_REQ_SET_FEATURE)
-			DBG(dev, "SETUP: USB_REQ_SET_FEATURE\n");
+			dev_dbg(&dev->pdev->dev,
+					"SETUP: USB_REQ_SET_FEATURE\n");
 		else if (setup->bRequest == USB_REQ_CLEAR_FEATURE)
-			DBG(dev, "SETUP: USB_REQ_CLEAR_FEATURE\n");
+			dev_dbg(&dev->pdev->dev,
+					"SETUP: USB_REQ_CLEAR_FEATURE\n");
 
 		if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
 				== (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
@@ -2240,8 +2229,8 @@
 
 			spin_unlock(&dev->lock);
 			rc = langwell_ep_set_halt(&epn->ep,
-					(setup->bRequest == USB_REQ_SET_FEATURE)
-						? 1 : 0);
+				(setup->bRequest == USB_REQ_SET_FEATURE)
+				? 1 : 0);
 			spin_lock(&dev->lock);
 
 		} else if ((setup->bRequestType & (USB_RECIP_MASK
@@ -2274,31 +2263,38 @@
 	}
 
 	case USB_REQ_GET_DESCRIPTOR:
-		DBG(dev, "SETUP: USB_REQ_GET_DESCRIPTOR\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_GET_DESCRIPTOR\n");
 		goto delegate;
 
 	case USB_REQ_SET_DESCRIPTOR:
-		DBG(dev, "SETUP: USB_REQ_SET_DESCRIPTOR unsupported\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_SET_DESCRIPTOR unsupported\n");
 		goto delegate;
 
 	case USB_REQ_GET_CONFIGURATION:
-		DBG(dev, "SETUP: USB_REQ_GET_CONFIGURATION\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_GET_CONFIGURATION\n");
 		goto delegate;
 
 	case USB_REQ_SET_CONFIGURATION:
-		DBG(dev, "SETUP: USB_REQ_SET_CONFIGURATION\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_SET_CONFIGURATION\n");
 		goto delegate;
 
 	case USB_REQ_GET_INTERFACE:
-		DBG(dev, "SETUP: USB_REQ_GET_INTERFACE\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_GET_INTERFACE\n");
 		goto delegate;
 
 	case USB_REQ_SET_INTERFACE:
-		DBG(dev, "SETUP: USB_REQ_SET_INTERFACE\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_SET_INTERFACE\n");
 		goto delegate;
 
 	case USB_REQ_SYNCH_FRAME:
-		DBG(dev, "SETUP: USB_REQ_SYNCH_FRAME unsupported\n");
+		dev_dbg(&dev->pdev->dev,
+				"SETUP: USB_REQ_SYNCH_FRAME unsupported\n");
 		goto delegate;
 
 	default:
@@ -2310,7 +2306,8 @@
 			/* DATA phase from gadget, STATUS phase from udc */
 			dev->ep0_dir = (setup->bRequestType & USB_DIR_IN)
 					?  USB_DIR_IN : USB_DIR_OUT;
-			VDBG(dev, "dev->ep0_dir = 0x%x, wLength = %d\n",
+			dev_vdbg(&dev->pdev->dev,
+					"dev->ep0_dir = 0x%x, wLength = %d\n",
 					dev->ep0_dir, wLength);
 			spin_unlock(&dev->lock);
 			if (dev->driver->setup(&dev->gadget,
@@ -2322,7 +2319,8 @@
 		} else {
 			/* no DATA phase, IN STATUS phase from gadget */
 			dev->ep0_dir = USB_DIR_IN;
-			VDBG(dev, "dev->ep0_dir = 0x%x, wLength = %d\n",
+			dev_vdbg(&dev->pdev->dev,
+					"dev->ep0_dir = 0x%x, wLength = %d\n",
 					dev->ep0_dir, wLength);
 			spin_unlock(&dev->lock);
 			if (dev->driver->setup(&dev->gadget,
@@ -2334,7 +2332,7 @@
 		break;
 	}
 end:
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 }
 
@@ -2359,7 +2357,7 @@
 	td_complete = 0;
 	actual = curr_req->req.length;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	for (i = 0; i < curr_req->dtd_count; i++) {
 		remaining_length = le16_to_cpu(curr_dtd->dtd_total);
@@ -2372,10 +2370,12 @@
 			/* transfers completed successfully */
 			if (!remaining_length) {
 				td_complete++;
-				VDBG(dev, "dTD transmitted successfully\n");
+				dev_vdbg(&dev->pdev->dev,
+					"dTD transmitted successfully\n");
 			} else {
 				if (dir) {
-					VDBG(dev, "TX dTD remains data\n");
+					dev_vdbg(&dev->pdev->dev,
+						"TX dTD remains data\n");
 					retval = -EPROTO;
 					break;
 
@@ -2387,27 +2387,32 @@
 		} else {
 			/* transfers completed with errors */
 			if (dtd_status & DTD_STS_ACTIVE) {
-				DBG(dev, "request not completed\n");
+				dev_dbg(&dev->pdev->dev,
+					"dTD status ACTIVE dQH[%d]\n", index);
 				retval = 1;
 				return retval;
 			} else if (dtd_status & DTD_STS_HALTED) {
-				ERROR(dev, "dTD error %08x dQH[%d]\n",
-						dtd_status, index);
+				dev_err(&dev->pdev->dev,
+					"dTD error %08x dQH[%d]\n",
+					dtd_status, index);
 				/* clear the errors and halt condition */
 				curr_dqh->dtd_status = 0;
 				retval = -EPIPE;
 				break;
 			} else if (dtd_status & DTD_STS_DBE) {
-				DBG(dev, "data buffer (overflow) error\n");
+				dev_dbg(&dev->pdev->dev,
+					"data buffer (overflow) error\n");
 				retval = -EPROTO;
 				break;
 			} else if (dtd_status & DTD_STS_TRE) {
-				DBG(dev, "transaction(ISO) error\n");
+				dev_dbg(&dev->pdev->dev,
+					"transaction(ISO) error\n");
 				retval = -EILSEQ;
 				break;
 			} else
-				ERROR(dev, "unknown error (0x%x)!\n",
-						dtd_status);
+				dev_err(&dev->pdev->dev,
+					"unknown error (0x%x)!\n",
+					dtd_status);
 		}
 
 		if (i != curr_req->dtd_count - 1)
@@ -2420,7 +2425,7 @@
 
 	curr_req->req.actual = actual;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -2430,7 +2435,7 @@
 		struct langwell_ep *ep0, struct langwell_request *req)
 {
 	u32	new_addr;
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dev->usb_state == USB_STATE_ADDRESS) {
 		/* set the new address */
@@ -2438,7 +2443,7 @@
 		writel(new_addr << USBADR_SHIFT, &dev->op_regs->deviceaddr);
 
 		new_addr = USBADR(readl(&dev->op_regs->deviceaddr));
-		VDBG(dev, "new_addr = %d\n", new_addr);
+		dev_vdbg(&dev->pdev->dev, "new_addr = %d\n", new_addr);
 	}
 
 	done(ep0, req, 0);
@@ -2458,14 +2463,14 @@
 		dev->ep0_state = WAIT_FOR_SETUP;
 		break;
 	case WAIT_FOR_SETUP:
-		ERROR(dev, "unexpect ep0 packets\n");
+		dev_err(&dev->pdev->dev, "unexpect ep0 packets\n");
 		break;
 	default:
 		ep0_stall(dev);
 		break;
 	}
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2477,16 +2482,17 @@
 	struct langwell_ep	*epn;
 	struct langwell_request	*curr_req, *temp_req;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	complete_bits = readl(&dev->op_regs->endptcomplete);
-	VDBG(dev, "endptcomplete register: 0x%08x\n", complete_bits);
+	dev_vdbg(&dev->pdev->dev, "endptcomplete register: 0x%08x\n",
+			complete_bits);
 
 	/* Write-Clear the bits in endptcomplete register */
 	writel(complete_bits, &dev->op_regs->endptcomplete);
 
 	if (!complete_bits) {
-		DBG(dev, "complete_bits = 0\n");
+		dev_dbg(&dev->pdev->dev, "complete_bits = 0\n");
 		goto done;
 	}
 
@@ -2506,23 +2512,25 @@
 			epn = &dev->ep[i];
 
 		if (epn->name == NULL) {
-			WARNING(dev, "invalid endpoint\n");
+			dev_warn(&dev->pdev->dev, "invalid endpoint\n");
 			continue;
 		}
 
 		if (i < 2)
 			/* ep0 in and out */
-			DBG(dev, "%s-%s transfer completed\n",
+			dev_dbg(&dev->pdev->dev, "%s-%s transfer completed\n",
 					epn->name,
 					is_in(epn) ? "in" : "out");
 		else
-			DBG(dev, "%s transfer completed\n", epn->name);
+			dev_dbg(&dev->pdev->dev, "%s transfer completed\n",
+					epn->name);
 
 		/* process the req queue until an uncomplete request */
 		list_for_each_entry_safe(curr_req, temp_req,
 				&epn->queue, queue) {
 			status = process_ep_req(dev, i, curr_req);
-			VDBG(dev, "%s req status: %d\n", epn->name, status);
+			dev_vdbg(&dev->pdev->dev, "%s req status: %d\n",
+					epn->name, status);
 
 			if (status)
 				break;
@@ -2540,7 +2548,7 @@
 		}
 	}
 done:
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return;
 }
 
@@ -2551,14 +2559,14 @@
 	u32	portsc1, devlc;
 	u32	speed;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dev->bus_reset)
 		dev->bus_reset = 0;
 
 	portsc1 = readl(&dev->op_regs->portsc1);
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "portsc1 = 0x%08x, devlc = 0x%08x\n",
+	dev_vdbg(&dev->pdev->dev, "portsc1 = 0x%08x, devlc = 0x%08x\n",
 			portsc1, devlc);
 
 	/* bus reset is finished */
@@ -2579,25 +2587,22 @@
 			dev->gadget.speed = USB_SPEED_UNKNOWN;
 			break;
 		}
-		VDBG(dev, "speed = %d, dev->gadget.speed = %d\n",
+		dev_vdbg(&dev->pdev->dev,
+				"speed = %d, dev->gadget.speed = %d\n",
 				speed, dev->gadget.speed);
 	}
 
 	/* LPM L0 to L1 */
 	if (dev->lpm && dev->lpm_state == LPM_L0)
 		if (portsc1 & PORTS_SUSP && portsc1 & PORTS_SLP) {
-				INFO(dev, "LPM L0 to L1\n");
-				dev->lpm_state = LPM_L1;
+			dev_info(&dev->pdev->dev, "LPM L0 to L1\n");
+			dev->lpm_state = LPM_L1;
 		}
 
 	/* LPM L1 to L0, force resume or remote wakeup finished */
 	if (dev->lpm && dev->lpm_state == LPM_L1)
 		if (!(portsc1 & PORTS_SUSP)) {
-			if (portsc1 & PORTS_SLP)
-				INFO(dev, "LPM L1 to L0, force resume\n");
-			else
-				INFO(dev, "LPM L1 to L0, remote wakeup\n");
-
+			dev_info(&dev->pdev->dev, "LPM L1 to L0\n");
 			dev->lpm_state = LPM_L0;
 		}
 
@@ -2605,7 +2610,7 @@
 	if (!dev->resume_state)
 		dev->usb_state = USB_STATE_DEFAULT;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2617,7 +2622,7 @@
 			endptcomplete;
 	unsigned long	timeout;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* Write-Clear the device address */
 	deviceaddr = readl(&dev->op_regs->deviceaddr);
@@ -2651,7 +2656,7 @@
 	timeout = jiffies + PRIME_TIMEOUT;
 	while (readl(&dev->op_regs->endptprime)) {
 		if (time_after(jiffies, timeout)) {
-			ERROR(dev, "USB reset timeout\n");
+			dev_err(&dev->pdev->dev, "USB reset timeout\n");
 			break;
 		}
 		cpu_relax();
@@ -2661,7 +2666,7 @@
 	writel((u32) ~0, &dev->op_regs->endptflush);
 
 	if (readl(&dev->op_regs->portsc1) & PORTS_PR) {
-		VDBG(dev, "USB bus reset\n");
+		dev_vdbg(&dev->pdev->dev, "USB bus reset\n");
 		/* bus is reseting */
 		dev->bus_reset = 1;
 
@@ -2669,7 +2674,7 @@
 		stop_activity(dev, dev->driver);
 		dev->usb_state = USB_STATE_DEFAULT;
 	} else {
-		VDBG(dev, "device controller reset\n");
+		dev_vdbg(&dev->pdev->dev, "device controller reset\n");
 		/* controller reset */
 		langwell_udc_reset(dev);
 
@@ -2691,7 +2696,7 @@
 		dev->lotg->hsm.b_hnp_enable = 0;
 #endif
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2699,7 +2704,7 @@
 static void handle_bus_suspend(struct langwell_udc *dev)
 {
 	u32		devlc;
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	dev->resume_state = dev->usb_state;
 	dev->usb_state = USB_STATE_SUSPENDED;
@@ -2733,31 +2738,30 @@
 			spin_unlock(&dev->lock);
 			dev->driver->suspend(&dev->gadget);
 			spin_lock(&dev->lock);
-			DBG(dev, "suspend %s\n", dev->driver->driver.name);
+			dev_dbg(&dev->pdev->dev, "suspend %s\n",
+					dev->driver->driver.name);
 		}
 	}
 
 	/* enter PHY low power suspend */
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "devlc = 0x%08x\n", devlc);
 	devlc |= LPM_PHCD;
 	writel(devlc, &dev->op_regs->devlc);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
 static void handle_bus_resume(struct langwell_udc *dev)
 {
 	u32		devlc;
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	dev->usb_state = dev->resume_state;
 	dev->resume_state = 0;
 
 	/* exit PHY low power suspend */
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "devlc = 0x%08x\n", devlc);
 	devlc &= ~LPM_PHCD;
 	writel(devlc, &dev->op_regs->devlc);
 
@@ -2772,11 +2776,12 @@
 			spin_unlock(&dev->lock);
 			dev->driver->resume(&dev->gadget);
 			spin_lock(&dev->lock);
-			DBG(dev, "resume %s\n", dev->driver->driver.name);
+			dev_dbg(&dev->pdev->dev, "resume %s\n",
+					dev->driver->driver.name);
 		}
 	}
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 
@@ -2789,11 +2794,11 @@
 				irq_sts,
 				portsc1;
 
-	VDBG(dev, "---> %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	if (dev->stopped) {
-		VDBG(dev, "handle IRQ_NONE\n");
-		VDBG(dev, "<--- %s()\n", __func__);
+		dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n");
+		dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		return IRQ_NONE;
 	}
 
@@ -2806,12 +2811,13 @@
 	usbintr = readl(&dev->op_regs->usbintr);
 
 	irq_sts = usbsts & usbintr;
-	VDBG(dev, "usbsts = 0x%08x, usbintr = 0x%08x, irq_sts = 0x%08x\n",
+	dev_vdbg(&dev->pdev->dev,
+			"usbsts = 0x%08x, usbintr = 0x%08x, irq_sts = 0x%08x\n",
 			usbsts, usbintr, irq_sts);
 
 	if (!irq_sts) {
-		VDBG(dev, "handle IRQ_NONE\n");
-		VDBG(dev, "<--- %s()\n", __func__);
+		dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n");
+		dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		spin_unlock(&dev->lock);
 		return IRQ_NONE;
 	}
@@ -2827,12 +2833,13 @@
 
 	/* USB interrupt */
 	if (irq_sts & STS_UI) {
-		VDBG(dev, "USB interrupt\n");
+		dev_vdbg(&dev->pdev->dev, "USB interrupt\n");
 
 		/* setup packet received from ep0 */
 		if (readl(&dev->op_regs->endptsetupstat)
 				& EP0SETUPSTAT_MASK) {
-			VDBG(dev, "USB SETUP packet received interrupt\n");
+			dev_vdbg(&dev->pdev->dev,
+				"USB SETUP packet received interrupt\n");
 			/* setup tripwire semaphone */
 			setup_tripwire(dev);
 			handle_setup_packet(dev, &dev->local_setup_buff);
@@ -2840,7 +2847,8 @@
 
 		/* USB transfer completion */
 		if (readl(&dev->op_regs->endptcomplete)) {
-			VDBG(dev, "USB transfer completion interrupt\n");
+			dev_vdbg(&dev->pdev->dev,
+				"USB transfer completion interrupt\n");
 			handle_trans_complete(dev);
 		}
 	}
@@ -2848,36 +2856,36 @@
 	/* SOF received interrupt (for ISO transfer) */
 	if (irq_sts & STS_SRI) {
 		/* FIXME */
-		/* VDBG(dev, "SOF received interrupt\n"); */
+		/* dev_vdbg(&dev->pdev->dev, "SOF received interrupt\n"); */
 	}
 
 	/* port change detect interrupt */
 	if (irq_sts & STS_PCI) {
-		VDBG(dev, "port change detect interrupt\n");
+		dev_vdbg(&dev->pdev->dev, "port change detect interrupt\n");
 		handle_port_change(dev);
 	}
 
 	/* suspend interrrupt */
 	if (irq_sts & STS_SLI) {
-		VDBG(dev, "suspend interrupt\n");
+		dev_vdbg(&dev->pdev->dev, "suspend interrupt\n");
 		handle_bus_suspend(dev);
 	}
 
 	/* USB reset interrupt */
 	if (irq_sts & STS_URI) {
-		VDBG(dev, "USB reset interrupt\n");
+		dev_vdbg(&dev->pdev->dev, "USB reset interrupt\n");
 		handle_usb_reset(dev);
 	}
 
 	/* USB error or system error interrupt */
 	if (irq_sts & (STS_UEI | STS_SEI)) {
 		/* FIXME */
-		WARNING(dev, "error IRQ, irq_sts: %x\n", irq_sts);
+		dev_warn(&dev->pdev->dev, "error IRQ, irq_sts: %x\n", irq_sts);
 	}
 
 	spin_unlock(&dev->lock);
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return IRQ_HANDLED;
 }
 
@@ -2889,11 +2897,11 @@
 {
 	struct langwell_udc	*dev = the_controller;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	complete(dev->done);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	kfree(dev);
 }
 
@@ -2906,7 +2914,7 @@
 	DECLARE_COMPLETION(done);
 
 	BUG_ON(dev->driver);
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	dev->done = &done;
 
@@ -2949,8 +2957,8 @@
 
 	dev->cap_regs = NULL;
 
-	INFO(dev, "unbind\n");
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_info(&dev->pdev->dev, "unbind\n");
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 
 	device_unregister(&dev->gadget.dev);
 	device_remove_file(&pdev->dev, &dev_attr_langwell_udc);
@@ -2997,7 +3005,7 @@
 	spin_lock_init(&dev->lock);
 
 	dev->pdev = pdev;
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 #ifdef	OTG_TRANSCEIVER
 	/* PCI device is already enabled by otg_transceiver driver */
@@ -3022,7 +3030,7 @@
 	resource = pci_resource_start(pdev, 0);
 	len = pci_resource_len(pdev, 0);
 	if (!request_mem_region(resource, len, driver_name)) {
-		ERROR(dev, "controller already in use\n");
+		dev_err(&dev->pdev->dev, "controller already in use\n");
 		retval = -EBUSY;
 		goto error;
 	}
@@ -3031,33 +3039,35 @@
 	base = ioremap_nocache(resource, len);
 #endif
 	if (base == NULL) {
-		ERROR(dev, "can't map memory\n");
+		dev_err(&dev->pdev->dev, "can't map memory\n");
 		retval = -EFAULT;
 		goto error;
 	}
 
 	dev->cap_regs = (struct langwell_cap_regs __iomem *) base;
-	VDBG(dev, "dev->cap_regs: %p\n", dev->cap_regs);
+	dev_vdbg(&dev->pdev->dev, "dev->cap_regs: %p\n", dev->cap_regs);
 	dev->op_regs = (struct langwell_op_regs __iomem *)
 		(base + OP_REG_OFFSET);
-	VDBG(dev, "dev->op_regs: %p\n", dev->op_regs);
+	dev_vdbg(&dev->pdev->dev, "dev->op_regs: %p\n", dev->op_regs);
 
 	/* irq setup after old hardware is cleaned up */
 	if (!pdev->irq) {
-		ERROR(dev, "No IRQ. Check PCI setup!\n");
+		dev_err(&dev->pdev->dev, "No IRQ. Check PCI setup!\n");
 		retval = -ENODEV;
 		goto error;
 	}
 
 #ifndef	OTG_TRANSCEIVER
-	INFO(dev, "irq %d, io mem: 0x%08lx, len: 0x%08lx, pci mem 0x%p\n",
+	dev_info(&dev->pdev->dev,
+			"irq %d, io mem: 0x%08lx, len: 0x%08lx, pci mem 0x%p\n",
 			pdev->irq, resource, len, base);
 	/* enables bus-mastering for device dev */
 	pci_set_master(pdev);
 
 	if (request_irq(pdev->irq, langwell_irq, IRQF_SHARED,
 				driver_name, dev) != 0) {
-		ERROR(dev, "request interrupt %d failed\n", pdev->irq);
+		dev_err(&dev->pdev->dev,
+				"request interrupt %d failed\n", pdev->irq);
 		retval = -EBUSY;
 		goto error;
 	}
@@ -3071,32 +3081,34 @@
 	dev->lpm = (readl(&dev->cap_regs->hccparams) & HCC_LEN) ? 1 : 0;
 	dev->dciversion = readw(&dev->cap_regs->dciversion);
 	dev->devcap = (readl(&dev->cap_regs->dccparams) & DEVCAP) ? 1 : 0;
-	VDBG(dev, "dev->lpm: %d\n", dev->lpm);
-	VDBG(dev, "dev->dciversion: 0x%04x\n", dev->dciversion);
-	VDBG(dev, "dccparams: 0x%08x\n", readl(&dev->cap_regs->dccparams));
-	VDBG(dev, "dev->devcap: %d\n", dev->devcap);
+	dev_vdbg(&dev->pdev->dev, "dev->lpm: %d\n", dev->lpm);
+	dev_vdbg(&dev->pdev->dev, "dev->dciversion: 0x%04x\n",
+			dev->dciversion);
+	dev_vdbg(&dev->pdev->dev, "dccparams: 0x%08x\n",
+			readl(&dev->cap_regs->dccparams));
+	dev_vdbg(&dev->pdev->dev, "dev->devcap: %d\n", dev->devcap);
 	if (!dev->devcap) {
-		ERROR(dev, "can't support device mode\n");
+		dev_err(&dev->pdev->dev, "can't support device mode\n");
 		retval = -ENODEV;
 		goto error;
 	}
 
 	/* a pair of endpoints (out/in) for each address */
 	dev->ep_max = DEN(readl(&dev->cap_regs->dccparams)) * 2;
-	VDBG(dev, "dev->ep_max: %d\n", dev->ep_max);
+	dev_vdbg(&dev->pdev->dev, "dev->ep_max: %d\n", dev->ep_max);
 
 	/* allocate endpoints memory */
 	dev->ep = kzalloc(sizeof(struct langwell_ep) * dev->ep_max,
 			GFP_KERNEL);
 	if (!dev->ep) {
-		ERROR(dev, "allocate endpoints memory failed\n");
+		dev_err(&dev->pdev->dev, "allocate endpoints memory failed\n");
 		retval = -ENOMEM;
 		goto error;
 	}
 
 	/* allocate device dQH memory */
 	size = dev->ep_max * sizeof(struct langwell_dqh);
-	VDBG(dev, "orig size = %d\n", size);
+	dev_vdbg(&dev->pdev->dev, "orig size = %d\n", size);
 	if (size < DQH_ALIGNMENT)
 		size = DQH_ALIGNMENT;
 	else if ((size % DQH_ALIGNMENT) != 0) {
@@ -3106,17 +3118,18 @@
 	dev->ep_dqh = dma_alloc_coherent(&pdev->dev, size,
 					&dev->ep_dqh_dma, GFP_KERNEL);
 	if (!dev->ep_dqh) {
-		ERROR(dev, "allocate dQH memory failed\n");
+		dev_err(&dev->pdev->dev, "allocate dQH memory failed\n");
 		retval = -ENOMEM;
 		goto error;
 	}
 	dev->ep_dqh_size = size;
-	VDBG(dev, "ep_dqh_size = %d\n", dev->ep_dqh_size);
+	dev_vdbg(&dev->pdev->dev, "ep_dqh_size = %d\n", dev->ep_dqh_size);
 
 	/* initialize ep0 status request structure */
 	dev->status_req = kzalloc(sizeof(struct langwell_request), GFP_KERNEL);
 	if (!dev->status_req) {
-		ERROR(dev, "allocate status_req memory failed\n");
+		dev_err(&dev->pdev->dev,
+				"allocate status_req memory failed\n");
 		retval = -ENOMEM;
 		goto error;
 	}
@@ -3174,18 +3187,20 @@
 	}
 
 	/* done */
-	INFO(dev, "%s\n", driver_desc);
-	INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
-	INFO(dev, "Driver version: " DRIVER_VERSION "\n");
-	INFO(dev, "Support (max) %d endpoints\n", dev->ep_max);
-	INFO(dev, "Device interface version: 0x%04x\n", dev->dciversion);
-	INFO(dev, "Controller mode: %s\n", dev->devcap ? "Device" : "Host");
-	INFO(dev, "Support USB LPM: %s\n", dev->lpm ? "Yes" : "No");
+	dev_info(&dev->pdev->dev, "%s\n", driver_desc);
+	dev_info(&dev->pdev->dev, "irq %d, pci mem %p\n", pdev->irq, base);
+	dev_info(&dev->pdev->dev, "Driver version: " DRIVER_VERSION "\n");
+	dev_info(&dev->pdev->dev, "Support (max) %d endpoints\n", dev->ep_max);
+	dev_info(&dev->pdev->dev, "Device interface version: 0x%04x\n",
+			dev->dciversion);
+	dev_info(&dev->pdev->dev, "Controller mode: %s\n",
+			dev->devcap ? "Device" : "Host");
+	dev_info(&dev->pdev->dev, "Support USB LPM: %s\n",
+			dev->lpm ? "Yes" : "No");
 
-	VDBG(dev, "After langwell_udc_probe(), print all registers:\n");
-#ifdef	VERBOSE
+	dev_vdbg(&dev->pdev->dev,
+			"After langwell_udc_probe(), print all registers:\n");
 	print_all_registers(dev);
-#endif
 
 	the_controller = dev;
 
@@ -3197,12 +3212,12 @@
 	if (retval)
 		goto error;
 
-	VDBG(dev, "<--- %s()\n", __func__);
+	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 
 error:
 	if (dev) {
-		DBG(dev, "<--- %s()\n", __func__);
+		dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		langwell_udc_remove(pdev);
 	}
 
@@ -3216,7 +3231,7 @@
 	struct langwell_udc	*dev = the_controller;
 	u32			devlc;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* disable interrupt and set controller to stop state */
 	langwell_udc_stop(dev);
@@ -3226,7 +3241,6 @@
 		free_irq(pdev->irq, dev);
 	dev->got_irq = 0;
 
-
 	/* save PCI state */
 	pci_save_state(pdev);
 
@@ -3235,11 +3249,10 @@
 
 	/* enter PHY low power suspend */
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "devlc = 0x%08x\n", devlc);
 	devlc |= LPM_PHCD;
 	writel(devlc, &dev->op_regs->devlc);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -3250,11 +3263,10 @@
 	struct langwell_udc	*dev = the_controller;
 	u32			devlc;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* exit PHY low power suspend */
 	devlc = readl(&dev->op_regs->devlc);
-	VDBG(dev, "devlc = 0x%08x\n", devlc);
 	devlc &= ~LPM_PHCD;
 	writel(devlc, &dev->op_regs->devlc);
 
@@ -3265,10 +3277,11 @@
 	pci_restore_state(pdev);
 
 	/* enable IRQ handler */
-	if (request_irq(pdev->irq, langwell_irq, IRQF_SHARED, driver_name, dev)
-			!= 0) {
-		ERROR(dev, "request interrupt %d failed\n", pdev->irq);
-		return -1;
+	if (request_irq(pdev->irq, langwell_irq, IRQF_SHARED,
+				driver_name, dev) != 0) {
+		dev_err(&dev->pdev->dev, "request interrupt %d failed\n",
+				pdev->irq);
+		return -EBUSY;
 	}
 	dev->got_irq = 1;
 
@@ -3290,7 +3303,7 @@
 	dev->ep0_state = WAIT_FOR_SETUP;
 	dev->ep0_dir = USB_DIR_OUT;
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 	return 0;
 }
 
@@ -3301,15 +3314,15 @@
 	struct langwell_udc	*dev = the_controller;
 	u32			usbmode;
 
-	DBG(dev, "---> %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
 	/* reset controller mode to IDLE */
 	usbmode = readl(&dev->op_regs->usbmode);
-	DBG(dev, "usbmode = 0x%08x\n", usbmode);
+	dev_dbg(&dev->pdev->dev, "usbmode = 0x%08x\n", usbmode);
 	usbmode &= (~3 | MODE_IDLE);
 	writel(usbmode, &dev->op_regs->usbmode);
 
-	DBG(dev, "<--- %s()\n", __func__);
+	dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 }
 
 /*-------------------------------------------------------------------------*/
@@ -3324,7 +3337,6 @@
 }, { /* end: all zeroes */ }
 };
 
-
 MODULE_DEVICE_TABLE(pci, pci_ids);
 
 
@@ -3343,12 +3355,6 @@
 };
 
 
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Xiaochen Shen <xiaochen.shen@intel.com>");
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL");
-
-
 static int __init init(void)
 {
 #ifdef	OTG_TRANSCEIVER
@@ -3370,3 +3376,9 @@
 }
 module_exit(cleanup);
 
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Xiaochen Shen <xiaochen.shen@intel.com>");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+