fix: improve Bluetooth reliability

kernel/src/Drivers/USB/Xhci.cpp

@@ -988,6 +988,38 @@ namespace Drivers::USB::Xhci {
         SendCommand(deqTrb);
     }
 
+    // -------------------------------------------------------------------------
+    // ResetBulkOutEndpoint - clear a halted bulk OUT endpoint
+    // -------------------------------------------------------------------------
+
+    void ResetBulkOutEndpoint(uint8_t slotId) {
+        if (slotId == 0 || slotId > MAX_SLOTS || !g_devices[slotId].Active) return;
+        UsbDeviceInfo& dev = g_devices[slotId];
+        if (dev.BulkOutEpNum == 0 || !dev.BulkOutRing) return;
+
+        uint8_t dci = dev.BulkOutEpNum * 2;
+
+        TRB resetTrb = {};
+        resetTrb.Control = (TRB_RESET_ENDPOINT << TRB_TYPE_SHIFT)
+                         | ((uint32_t)slotId << 24)
+                         | ((uint32_t)dci << 16);
+        SendCommand(resetTrb);
+
+        // Skip the errored TRB and everything queued behind it.  The class
+        // driver releases the corresponding DMA slots before it sends again.
+        uint64_t newDeq = dev.BulkOutRingPhys
+                        + (uint64_t)dev.BulkOutRingEnqueue * sizeof(TRB);
+        if (dev.BulkOutRingCCS) newDeq |= 1;  // DCS bit
+
+        TRB deqTrb = {};
+        deqTrb.Parameter0 = (uint32_t)(newDeq & 0xFFFFFFFF);
+        deqTrb.Parameter1 = (uint32_t)(newDeq >> 32);
+        deqTrb.Control    = (TRB_SET_TR_DEQUEUE << TRB_TYPE_SHIFT)
+                          | ((uint32_t)slotId << 24)
+                          | ((uint32_t)dci << 16);
+        SendCommand(deqTrb);
+    }
+
     // -------------------------------------------------------------------------
     // QueueBulkInTransfer
     // -------------------------------------------------------------------------