usb: dwc3: remove trace_* APIs from dwc3 driver

Removed most of the trace_* APIs from dwc3 driver since tracepoints are not
supported in u-boot. Replaced some of the trace_* API with dev_dbg/dev/vdbg.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Review-by: Lukasz Majewski <l.majewski@samsung.com>

drivers/usb/dwc3/Makefile

@@ -1,12 +1,9 @@
-# define_trace.h needs to know how to find our header
-CFLAGS_trace.o				:= -I$(src)
-
 ccflags-$(CONFIG_USB_DWC3_DEBUG)	:= -DDEBUG
 ccflags-$(CONFIG_USB_DWC3_VERBOSE)	+= -DVERBOSE_DEBUG
 
 obj-$(CONFIG_USB_DWC3)			+= dwc3.o
 
-dwc3-y					:= core.o debug.o trace.o
+dwc3-y					:= core.o debug.o
 
 ifneq ($(filter y,$(CONFIG_USB_DWC3_HOST) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
 	dwc3-y				+= host.o

drivers/usb/dwc3/ep0.c

@@ -64,7 +64,7 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
 
 	dep = dwc->eps[epnum];
 	if (dep->flags & DWC3_EP_BUSY) {
-		dwc3_trace(trace_dwc3_ep0, "%s still busy", dep->name);
+		dev_vdbg(dwc->dev, "%s still busy", dep->name);
 		return 0;
 	}
 
@@ -84,13 +84,10 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
 	params.param0 = upper_32_bits(dwc->ep0_trb_addr);
 	params.param1 = lower_32_bits(dwc->ep0_trb_addr);
 
-	trace_dwc3_prepare_trb(dep, trb);
-
 	ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
 			DWC3_DEPCMD_STARTTRANSFER, &params);
 	if (ret < 0) {
-		dwc3_trace(trace_dwc3_ep0, "%s STARTTRANSFER failed",
-				dep->name);
+		dev_dbg(dwc->dev, "%s STARTTRANSFER failed", dep->name);
 		return ret;
 	}
 
@@ -155,8 +152,7 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
 		if (dwc->ep0state == EP0_STATUS_PHASE)
 			__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
 		else
-			dwc3_trace(trace_dwc3_ep0,
-					"too early for delayed status");
+			dev_dbg(dwc->dev, "too early for delayed status");
 
 		return 0;
 	}
@@ -220,8 +216,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
 
 	spin_lock_irqsave(&dwc->lock, flags);
 	if (!dep->endpoint.desc) {
-		dwc3_trace(trace_dwc3_ep0,
-				"trying to queue request %p to disabled %s",
+		dev_dbg(dwc->dev, "trying to queue request %p to disabled %s",
 				request, dep->name);
 		ret = -ESHUTDOWN;
 		goto out;
@@ -233,8 +228,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
 		goto out;
 	}
 
-	dwc3_trace(trace_dwc3_ep0,
-			"queueing request %p to %s length %d state '%s'",
+	dev_vdbg(dwc->dev, "queueing request %p to %s length %d state '%s'",
 			request, dep->name, request->length,
 			dwc3_ep0_state_string(dwc->ep0state));
 
@@ -503,13 +497,12 @@ static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 
 	addr = le16_to_cpu(ctrl->wValue);
 	if (addr > 127) {
-		dwc3_trace(trace_dwc3_ep0, "invalid device address %d", addr);
+		dev_dbg(dwc->dev, "invalid device address %d", addr);
 		return -EINVAL;
 	}
 
 	if (state == USB_STATE_CONFIGURED) {
-		dwc3_trace(trace_dwc3_ep0,
-				"trying to set address when configured");
+		dev_dbg(dwc->dev, "trying to set address when configured");
 		return -EINVAL;
 	}
 
@@ -574,7 +567,7 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 			dwc3_writel(dwc->regs, DWC3_DCTL, reg);
 
 			dwc->resize_fifos = true;
-			dwc3_trace(trace_dwc3_ep0, "resize FIFOs flag SET");
+			dev_dbg(dwc->dev, "resize FIFOs flag SET");
 		}
 		break;
 
@@ -698,35 +691,35 @@ static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 
 	switch (ctrl->bRequest) {
 	case USB_REQ_GET_STATUS:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_GET_STATUS");
+		dev_vdbg(dwc->dev, "USB_REQ_GET_STATUS");
 		ret = dwc3_ep0_handle_status(dwc, ctrl);
 		break;
 	case USB_REQ_CLEAR_FEATURE:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_CLEAR_FEATURE");
+		dev_vdbg(dwc->dev, "USB_REQ_CLEAR_FEATURE");
 		ret = dwc3_ep0_handle_feature(dwc, ctrl, 0);
 		break;
 	case USB_REQ_SET_FEATURE:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_FEATURE");
+		dev_vdbg(dwc->dev, "USB_REQ_SET_FEATURE");
 		ret = dwc3_ep0_handle_feature(dwc, ctrl, 1);
 		break;
 	case USB_REQ_SET_ADDRESS:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ADDRESS");
+		dev_vdbg(dwc->dev, "USB_REQ_SET_ADDRESS");
 		ret = dwc3_ep0_set_address(dwc, ctrl);
 		break;
 	case USB_REQ_SET_CONFIGURATION:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_CONFIGURATION");
+		dev_vdbg(dwc->dev, "USB_REQ_SET_CONFIGURATION");
 		ret = dwc3_ep0_set_config(dwc, ctrl);
 		break;
 	case USB_REQ_SET_SEL:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_SEL");
+		dev_vdbg(dwc->dev, "USB_REQ_SET_SEL");
 		ret = dwc3_ep0_set_sel(dwc, ctrl);
 		break;
 	case USB_REQ_SET_ISOCH_DELAY:
-		dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ISOCH_DELAY");
+		dev_vdbg(dwc->dev, "USB_REQ_SET_ISOCH_DELAY");
 		ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);
 		break;
 	default:
-		dwc3_trace(trace_dwc3_ep0, "Forwarding to gadget driver");
+		dev_vdbg(dwc->dev, "Forwarding to gadget driver");
 		ret = dwc3_ep0_delegate_req(dwc, ctrl);
 		break;
 	}
@@ -744,8 +737,6 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
 	if (!dwc->gadget_driver)
 		goto out;
 
-	trace_dwc3_ctrl_req(ctrl);
-
 	len = le16_to_cpu(ctrl->wLength);
 	if (!len) {
 		dwc->three_stage_setup = false;
@@ -789,15 +780,13 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 
 	trb = dwc->ep0_trb;
 
-	trace_dwc3_complete_trb(ep0, trb);
-
 	r = next_request(&ep0->request_list);
 	if (!r)
 		return;
 
 	status = DWC3_TRB_SIZE_TRBSTS(trb->size);
 	if (status == DWC3_TRBSTS_SETUP_PENDING) {
-		dwc3_trace(trace_dwc3_ep0, "Setup Pending received");
+		dev_dbg(dwc->dev, "Setup Pending received");
 
 		if (r)
 			dwc3_gadget_giveback(ep0, r, -ECONNRESET);
@@ -855,8 +844,6 @@ static void dwc3_ep0_complete_status(struct dwc3 *dwc,
 	dep = dwc->eps[0];
 	trb = dwc->ep0_trb;
 
-	trace_dwc3_complete_trb(dep, trb);
-
 	if (!list_empty(&dep->request_list)) {
 		r = next_request(&dep->request_list);
 
@@ -868,7 +855,7 @@ static void dwc3_ep0_complete_status(struct dwc3 *dwc,
 
 		ret = dwc3_gadget_set_test_mode(dwc, dwc->test_mode_nr);
 		if (ret < 0) {
-			dwc3_trace(trace_dwc3_ep0, "Invalid Test #%d",
+			dev_dbg(dwc->dev, "Invalid Test #%d",
 					dwc->test_mode_nr);
 			dwc3_ep0_stall_and_restart(dwc);
 			return;
@@ -877,7 +864,7 @@ static void dwc3_ep0_complete_status(struct dwc3 *dwc,
 
 	status = DWC3_TRB_SIZE_TRBSTS(trb->size);
 	if (status == DWC3_TRBSTS_SETUP_PENDING)
-		dwc3_trace(trace_dwc3_ep0, "Setup Pending received");
+		dev_dbg(dwc->dev, "Setup Pending received");
 
 	dwc->ep0state = EP0_SETUP_PHASE;
 	dwc3_ep0_out_start(dwc);
@@ -894,17 +881,17 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 
 	switch (dwc->ep0state) {
 	case EP0_SETUP_PHASE:
-		dwc3_trace(trace_dwc3_ep0, "Setup Phase");
+		dev_vdbg(dwc->dev, "Setup Phase");
 		dwc3_ep0_inspect_setup(dwc, event);
 		break;
 
 	case EP0_DATA_PHASE:
-		dwc3_trace(trace_dwc3_ep0, "Data Phase");
+		dev_vdbg(dwc->dev, "Data Phase");
 		dwc3_ep0_complete_data(dwc, event);
 		break;
 
 	case EP0_STATUS_PHASE:
-		dwc3_trace(trace_dwc3_ep0, "Status Phase");
+		dev_vdbg(dwc->dev, "Status Phase");
 		dwc3_ep0_complete_status(dwc, event);
 		break;
 	default:
@@ -980,7 +967,7 @@ static int dwc3_ep0_start_control_status(struct dwc3_ep *dep)
 static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep)
 {
 	if (dwc->resize_fifos) {
-		dwc3_trace(trace_dwc3_ep0, "Resizing FIFOs");
+		dev_dbg(dwc->dev, "Resizing FIFOs");
 		dwc3_gadget_resize_tx_fifos(dwc);
 		dwc->resize_fifos = 0;
 	}
@@ -1021,7 +1008,7 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 
 	switch (event->status) {
 	case DEPEVT_STATUS_CONTROL_DATA:
-		dwc3_trace(trace_dwc3_ep0, "Control Data");
+		dev_vdbg(dwc->dev, "Control Data");
 
 		/*
 		 * We already have a DATA transfer in the controller's cache,
@@ -1035,8 +1022,7 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 		if (dwc->ep0_expect_in != event->endpoint_number) {
 			struct dwc3_ep	*dep = dwc->eps[dwc->ep0_expect_in];
 
-			dwc3_trace(trace_dwc3_ep0,
-					"Wrong direction for Data phase");
+			dev_vdbg(dwc->dev, "Wrong direction for Data phase");
 			dwc3_ep0_end_control_data(dwc, dep);
 			dwc3_ep0_stall_and_restart(dwc);
 			return;
@@ -1048,13 +1034,13 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 		if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS)
 			return;
 
-		dwc3_trace(trace_dwc3_ep0, "Control Status");
+		dev_vdbg(dwc->dev, "Control Status");
 
 		dwc->ep0state = EP0_STATUS_PHASE;
 
 		if (dwc->delayed_status) {
 			WARN_ON_ONCE(event->endpoint_number != 1);
-			dwc3_trace(trace_dwc3_ep0, "Delayed Status");
+			dev_vdbg(dwc->dev, "Delayed Status");
 			return;
 		}
 
@@ -1067,7 +1053,7 @@ void dwc3_ep0_interrupt(struct dwc3 *dwc,
 {
 	u8			epnum = event->endpoint_number;
 
-	dwc3_trace(trace_dwc3_ep0, "%s while ep%d%s in state '%s'",
+	dev_dbg(dwc->dev, "%s while ep%d%s in state '%s'",
 			dwc3_ep_event_string(event->endpoint_event),
 			epnum >> 1, (epnum & 1) ? "in" : "out",
 			dwc3_ep0_state_string(dwc->ep0state));

drivers/usb/dwc3/gadget.c

@@ -265,7 +265,6 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 	dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n",
 			req, dep->name, req->request.actual,
 			req->request.length, status);
-	trace_dwc3_gadget_giveback(req);
 
 	spin_unlock(&dwc->lock);
 	usb_gadget_giveback_request(&dep->endpoint, &req->request);
@@ -277,8 +276,6 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
 	u32		timeout = 500;
 	u32		reg;
 
-	trace_dwc3_gadget_generic_cmd(cmd, param);
-
 	dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);
 	dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);
 
@@ -308,8 +305,6 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
 	u32			timeout = 500;
 	u32			reg;
 
-	trace_dwc3_gadget_ep_cmd(dep, cmd, params);
-
 	dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0);
 	dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1);
 	dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2);
@@ -704,8 +699,6 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep,
 	req->epnum	= dep->number;
 	req->dep	= dep;
 
-	trace_dwc3_alloc_request(req);
-
 	return &req->request;
 }
 
@@ -714,7 +707,6 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
 {
 	struct dwc3_request		*req = to_dwc3_request(request);
 
-	trace_dwc3_free_request(req);
 	kfree(req);
 }
 
@@ -796,8 +788,6 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 		trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id);
 
 	trb->ctrl |= DWC3_TRB_CTRL_HWO;
-
-	trace_dwc3_prepare_trb(dep, trb);
 }
 
 /*
@@ -1150,7 +1140,6 @@ static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
 
 	dev_vdbg(dwc->dev, "queing request %p to %s length %d\n",
 			request, ep->name, request->length);
-	trace_dwc3_ep_queue(req);
 
 	ret = __dwc3_gadget_ep_queue(dep, req);
 
@@ -1172,8 +1161,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 	unsigned long			flags;
 	int				ret = 0;
 
-	trace_dwc3_ep_dequeue(req);
-
 	spin_lock_irqsave(&dwc->lock, flags);
 
 	list_for_each_entry(r, &dep->request_list, list) {
@@ -1771,8 +1758,6 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
 	unsigned int		s_pkt = 0;
 	unsigned int		trb_status;
 
-	trace_dwc3_complete_trb(dep, trb);
-
 	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
 		/*
 		 * We continue despite the error. There is not much we
@@ -2529,8 +2514,6 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc,
 static void dwc3_process_event_entry(struct dwc3 *dwc,
 		const union dwc3_event *event)
 {
-	trace_dwc3_event(event->raw);
-
 	/* Endpoint IRQ, handle it and return early */
 	if (event->type.is_devspec == 0) {
 		/* depevt */

drivers/usb/dwc3/io.h

@@ -19,7 +19,6 @@
 #define __DRIVERS_USB_DWC3_IO_H
 
 #include <linux/io.h>
-#include "trace.h"
 #include "debug.h"
 #include "core.h"
 
@@ -35,14 +34,6 @@ static inline u32 dwc3_readl(void __iomem *base, u32 offset)
 	 */
 	value = readl(base + offs);
 
-	/*
-	 * When tracing we want to make it easy to find the correct address on
-	 * documentation, so we revert it back to the proper addresses, the
-	 * same way they are described on SNPS documentation
-	 */
-	dwc3_trace(trace_dwc3_readl, "addr %p value %08x",
-			base - DWC3_GLOBALS_REGS_START + offset, value);
-
 	return value;
 }
 
@@ -56,14 +47,6 @@ static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
 	 * However, the offsets are given starting from xHCI address space.
 	 */
 	writel(value, base + offs);
-
-	/*
-	 * When tracing we want to make it easy to find the correct address on
-	 * documentation, so we revert it back to the proper addresses, the
-	 * same way they are described on SNPS documentation
-	 */
-	dwc3_trace(trace_dwc3_writel, "addr %p value %08x",
-			base - DWC3_GLOBALS_REGS_START + offset, value);
 }
 
 #endif /* __DRIVERS_USB_DWC3_IO_H */