usb: dwc3: debug: decode control endpoint phase too
DWC3 can tell us which phase of a setup transfer
we're getting into. Let's decode it from the event
to make it easier to debug.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 99fa8b8..18e4c09 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1041,6 +1041,7 @@ struct dwc3_event_depevt {
/* Control-only Status */
#define DEPEVT_STATUS_CONTROL_DATA 1
#define DEPEVT_STATUS_CONTROL_STATUS 2
+#define DEPEVT_STATUS_CONTROL_PHASE(n) ((n) & 3)
/* In response to Start Transfer */
#define DEPEVT_TRANSFER_NO_RESOURCE 1
diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 33ab2a2..fe8abee 100644
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -207,6 +207,19 @@ dwc3_ep_event_string(const struct dwc3_event_depevt *event)
strcat(str, "Transfer Not Ready");
status = event->status & DEPEVT_STATUS_TRANSFER_ACTIVE;
strcat(str, status ? " (Active)" : " (Not Active)");
+
+ /* Control Endpoints */
+ if (epnum <= 1) {
+ int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);
+
+ switch (phase) {
+ case DEPEVT_STATUS_CONTROL_DATA:
+ strcat(str, " [Data Phase]");
+ break;
+ case DEPEVT_STATUS_CONTROL_STATUS:
+ strcat(str, " [Status Phase]");
+ }
+ }
break;
case DWC3_DEPEVT_RXTXFIFOEVT:
strcat(str, "FIFO");
