1 files changed, 51 insertions, 2 deletions

diff --git a/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c b/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
index 8449997..b1cfb8e 100644
--- a/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
+++ b/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
@@ -14,10 +14,23 @@
 

 #include <Base.h>

 #include <Uefi/UefiBaseType.h>

+#include <Library/PciLib.h>
 #include <Library/PlatformHookLib.h>

 #include <Library/CbParseLib.h>

 #include <Library/PcdLib.h>

 

+typedef struct {
+  UINT16  VendorId;          ///< Vendor ID to match the PCI device.  The value 0xFFFF terminates the list of entries.
+  UINT16  DeviceId;          ///< Device ID to match the PCI device
+  UINT32  ClockRate;         ///< UART clock rate.  Set to 0 for default clock rate of 1843200 Hz
+  UINT64  Offset;            ///< The byte offset into to the BAR
+  UINT8   BarIndex;          ///< Which BAR to get the UART base address
+  UINT8   RegisterStride;    ///< UART register stride in bytes.  Set to 0 for default register stride of 1 byte.
+  UINT16  ReceiveFifoDepth;  ///< UART receive FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.
+  UINT16  TransmitFifoDepth; ///< UART transmit FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.
+  UINT8   Reserved[2];
+} PCI_SERIAL_PARAMETER;
+
 /**

   Performs platform specific initialization required for the CPU to access

   the hardware associated with a SerialPortLib instance.  This function does

@@ -38,8 +51,16 @@ PlatformHookSerialPortInitialize (
   RETURN_STATUS     Status;

   UINT32            SerialRegBase;

   UINT32            SerialRegAccessType;

+  UINT32            BaudRate;
+  UINT32            RegWidth;
+  UINT32            InputHertz;
+  UINT32            PayloadParam;
+  UINT32            DeviceVendor;
+  PCI_SERIAL_PARAMETER *SerialParam;
 

-  Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType, NULL);

+  Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType,
+                              &RegWidth, &BaudRate, &InputHertz,
+                              &PayloadParam);
   if (RETURN_ERROR (Status)) {

     return Status;

   }

@@ -57,6 +78,34 @@ PlatformHookSerialPortInitialize (
     return Status;

   }

 

+  Status = PcdSet32S (PcdSerialRegisterStride, RegWidth);
+  if (RETURN_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = PcdSet32S (PcdSerialBaudRate, BaudRate);
+  if (RETURN_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = PcdSet64S (PcdUartDefaultBaudRate, BaudRate);
+  if (RETURN_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = PcdSet32S (PcdSerialClockRate, InputHertz);
+  if (RETURN_ERROR (Status)) {
+    return Status;
+  }
+
+  if (PayloadParam >= 0x80000000) {
+    DeviceVendor = PciRead32 (PayloadParam & 0x0ffff000);
+    SerialParam = PcdGetPtr(PcdPciSerialParameters);
+    SerialParam->VendorId = (UINT16)DeviceVendor;
+    SerialParam->DeviceId = DeviceVendor >> 16;
+    SerialParam->ClockRate = InputHertz;
+    SerialParam->RegisterStride = (UINT8)RegWidth;
+  }
+
   return RETURN_SUCCESS;

 }

-