[PATCH v3] SourceLevelDebugPkg/DebugCommunicationLibUsb: Add endpoint configuration.

["Marvin Häuser" <Marvin.Haeuser@outlook.com>]

Currently, DebugCommunicationLibUsb uses the hardcoded endpoints 0x82
and 0x01 to communicate with the EHCI Debug Device. These, however,
are not standardized and may vary across different hardware.
To solve this problem, the endpoints are retrieved from the
USB Device Descriptor directly.

V2:
  - Store endpoint data in the USB Debug Port handle sturcture.

V3:
  - Remove the static endpoint PCDs as requested.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marvin Haeuser <Marvin.Haeuser@outlook.com>
---
 SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c   | 18 ++++++++++++++++--
 SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.inf |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c
index d996f80f59e3..1836c055267b 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c
@@ -132,6 +132,14 @@ typedef struct _USB_DEBUG_PORT_HANDLE{
   //
   UINT32       EhciMemoryBase;
   //
+  // The usb debug device In endpoint.
+  //
+  UINT8        InEndpoint;
+  //
+  // The usb debug device Out endpoint.
+  //
+  UINT8        OutEndpoint;
+  //
   // The Bulk In endpoint toggle bit.
   //
   UINT8        BulkInToggle;
@@ -722,6 +730,12 @@ InitializeUsbDebugHardware (
       return RETURN_DEVICE_ERROR;
     }
 
+    //
+    // Determine the usb debug device endpoints.
+    //
+    Handle->InEndpoint  = UsbDebugPortDescriptor.DebugInEndpoint;
+    Handle->OutEndpoint = UsbDebugPortDescriptor.DebugOutEndpoint;
+
     //
     // enable the usb debug feature.
     //
@@ -879,7 +893,7 @@ DebugPortWriteBuffer (
       Sent = (UINT8)(NumberOfBytes - Total);
     }
 
-    Status = UsbDebugPortOut(UsbDebugPortRegister, Buffer + Total, Sent, OUTPUT_PID, 0x7F, 0x01, UsbDebugPortHandle->BulkOutToggle);
+    Status = UsbDebugPortOut(UsbDebugPortRegister, Buffer + Total, Sent, OUTPUT_PID, 0x7F, UsbDebugPortHandle->OutEndpoint, UsbDebugPortHandle->BulkOutToggle);
 
     if (RETURN_ERROR(Status)) {
       return Total;
@@ -959,7 +973,7 @@ DebugPortPollBuffer (
     UsbDebugPortRegister->SendPid  = DATA1_PID;
   }
   UsbDebugPortRegister->UsbAddress  = 0x7F;
-  UsbDebugPortRegister->UsbEndPoint = 0x82 & 0x0F;
+  UsbDebugPortRegister->UsbEndPoint = UsbDebugPortHandle->InEndpoint & 0x0F;
 
   //
   // Clearing W/R bit to indicate it's a READ operation
diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.inf b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.inf
index 028b04afbf00..8009f62075ff 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.inf
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.inf
@@ -45,7 +45,7 @@ [Pcd]
   gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdUsbEhciPciAddress              ## CONSUMES
   # The value of data buffer size used for USB debug port handle.
   # It should be equal to sizeof (USB_DEBUG_PORT_HANDLE).
-  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|23   ## SOMETIMES_CONSUMES
+  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|25   ## SOMETIMES_CONSUMES
 
 [LibraryClasses]
   TimerLib
-- 
2.17.1.windows.2