Commit f75cacc4 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: trace: fully decode IRQ events 



This will make it more human-friendly to read trace
output from dwc3.

Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 7ab373aa

drivers/usb/dwc3/debug.h

+88 −22
Original line number Diff line number Diff line
@@ -128,56 +128,112 @@ dwc3_gadget_link_string(enum dwc3_link_state link_state) 
 * dwc3_gadget_event_string - returns event name

 * @event: the event code

 */

static inline const char *dwc3_gadget_event_string(u8 event)

static inline const char *

dwc3_gadget_event_string(const struct dwc3_event_devt *event)

{

	switch (event) {

	static char str[256];

	enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;



	switch (event->type) {

	case DWC3_DEVICE_EVENT_DISCONNECT:

		return "Disconnect";

		sprintf(str, "Disconnect: [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_RESET:

		return "Reset";

		sprintf(str, "Reset [%s]", dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_CONNECT_DONE:

		return "Connection Done";

		sprintf(str, "Connection Done [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:

		return "Link Status Change";

		sprintf(str, "Link Change [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_WAKEUP:

		return "WakeUp";

		sprintf(str, "WakeUp [%s]", dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_EOPF:

		return "End-Of-Frame";

		sprintf(str, "End-Of-Frame [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_SOF:

		return "Start-Of-Frame";

		sprintf(str, "Start-Of-Frame [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_ERRATIC_ERROR:

		return "Erratic Error";

		sprintf(str, "Erratic Error [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_CMD_CMPL:

		return "Command Complete";

		sprintf(str, "Command Complete [%s]",

				dwc3_gadget_link_string(state));

		break;

	case DWC3_DEVICE_EVENT_OVERFLOW:

		return "Overflow";

		sprintf(str, "Overflow [%s]", dwc3_gadget_link_string(state));

		break;

	default:

		sprintf(str, "UNKNOWN");

	}



	return "UNKNOWN";

	return str;

}



/**

 * dwc3_ep_event_string - returns event name

 * @event: then event code

 */

static inline const char *dwc3_ep_event_string(u8 event)

static inline const char *

dwc3_ep_event_string(const struct dwc3_event_depevt *event)

{

	switch (event) {

	u8 epnum = event->endpoint_number;

	static char str[256];

	int status;

	int ret;



	ret = sprintf(str, "ep%d%s: ", epnum >> 1,

			(epnum & 1) ? "in" : "in");

	if (ret < 0)

		return "UNKNOWN";



	switch (event->endpoint_event) {

	case DWC3_DEPEVT_XFERCOMPLETE:

		return "Transfer Complete";

		strcat(str, "Transfer Complete");

		break;

	case DWC3_DEPEVT_XFERINPROGRESS:

		return "Transfer In-Progress";

		strcat(str, "Transfer In-Progress");

		break;

	case DWC3_DEPEVT_XFERNOTREADY:

		return "Transfer Not Ready";

		strcat(str, "Transfer Not Ready");

		status = event->status & DEPEVT_STATUS_TRANSFER_ACTIVE;

		strcat(str, status ? " (Active)" : " (Not Active)");

		break;

	case DWC3_DEPEVT_RXTXFIFOEVT:

		return "FIFO";

		strcat(str, "FIFO");

		break;

	case DWC3_DEPEVT_STREAMEVT:

		return "Stream";

		status = event->status;



		switch (status) {

		case DEPEVT_STREAMEVT_FOUND:

			sprintf(str + ret, " Stream %d Found",

					event->parameters);

			break;

		case DEPEVT_STREAMEVT_NOTFOUND:

		default:

			strcat(str, " Stream Not Found");

			break;

		}



		break;

	case DWC3_DEPEVT_EPCMDCMPLT:

		return "Endpoint Command Complete";

		strcat(str, "Endpoint Command Complete");

		break;

	default:

		sprintf(str, "UNKNOWN");

	}



	return "UNKNOWN";

	return str;

}



/**
@@ -214,6 +270,16 @@ static inline const char *dwc3_gadget_event_type_string(u8 event) 
	}

}



static inline const char *dwc3_decode_event(u32 event)

{

	const union dwc3_event evt = (union dwc3_event) event;



	if (evt.type.is_devspec)

		return dwc3_gadget_event_string(&evt.devt);

	else

		return dwc3_ep_event_string(&evt.depevt);

}



void dwc3_trace(void (*trace)(struct va_format *), const char *fmt, ...);



#ifdef CONFIG_DEBUG_FS

drivers/usb/dwc3/ep0.c

+2 −5
Original line number Diff line number Diff line
@@ -1109,11 +1109,8 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc, 
void dwc3_ep0_interrupt(struct dwc3 *dwc,

		const struct dwc3_event_depevt *event)

{

	u8			epnum = event->endpoint_number;



	dwc3_trace(trace_dwc3_ep0, "%s while ep%d%s in state '%s'",

			dwc3_ep_event_string(event->endpoint_event),

			epnum >> 1, (epnum & 1) ? "in" : "out",

	dwc3_trace(trace_dwc3_ep0, "%s: state '%s'",

			dwc3_ep_event_string(event),

			dwc3_ep0_state_string(dwc->ep0state));



	switch (event->endpoint_event) {

drivers/usb/dwc3/trace.h

+2 −1
Original line number Diff line number Diff line
@@ -71,7 +71,8 @@ DECLARE_EVENT_CLASS(dwc3_log_event, 
	TP_fast_assign(

		__entry->event = event;

	),

	TP_printk("event %08x", __entry->event)

	TP_printk("event (%08x): %s", __entry->event,

			dwc3_decode_event(__entry->event))

);



DEFINE_EVENT(dwc3_log_event, dwc3_event,