[Voyageurs] Receive keypress information from the usb keyboard.

sys/voyageurs/xhci/endpoint.cpp

@@ -0,0 +1,31 @@
+#include "xhci/endpoint.h"
+
+#include <mammoth/util/debug.h>
+
+void Endpoint::Initialize(XhciEndpointContext* context) {
+  enabled_ = true;
+  context_ = context;
+
+  trb_ring_ = glcr::MakeUnique<TrbRingWriter>();
+  recv_mem_ = mmth::OwnedMemoryRegion::ContiguousPhysical(0x1000, &recv_phys_);
+
+  context_->tr_dequeue_ptr = trb_ring_->PhysicalAddress() | 1;
+
+  context_->error_and_type = (0x3 << 1) | (0x7 << 3) | (0x8 << 16);
+  trb_ring_->EnqueueTrb({
+      .parameter = recv_phys_,
+      .status = 8,
+      .type_and_cycle = 1 | (1 << 2) | (1 << 5) | (1 << 10),
+      .control = 0,
+  });
+}
+
+void Endpoint::TransferComplete(uint64_t trb_phys) {
+  dbgln("Data: {x}", *(uint64_t*)recv_mem_.vaddr());
+  trb_ring_->EnqueueTrb({
+      .parameter = recv_phys_,
+      .status = 8,
+      .type_and_cycle = 1 | (1 << 2) | (1 << 5) | (1 << 10),
+      .control = 0,
+  });
+}