From 0a0951ea841a10c5c328b5525827a1490f575cb8 Mon Sep 17 00:00:00 2001
From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 30 Apr 2010 19:40:17 +0000
Subject: [PATCH] Update FileLib to use pointer to BlockIo->Media and not a
 cached copy also add some code in the library init that allows removable
 media devices to be probed to see if a media change has happened.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10449 6f19259b-4bc3-4df7-8a09-765794883524
---
 EmbeddedPkg/Ebl/EfiDevice.c                 | 20 ++++++------
 EmbeddedPkg/Include/Library/EfiFileLib.h    |  2 +-
 EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c | 35 ++++++++++++++++++---
 3 files changed, 42 insertions(+), 15 deletions(-)

diff --git a/EmbeddedPkg/Ebl/EfiDevice.c b/EmbeddedPkg/Ebl/EfiDevice.c
index f568a1f016..9b08fda12a 100644
--- a/EmbeddedPkg/Ebl/EfiDevice.c
+++ b/EmbeddedPkg/Ebl/EfiDevice.c
@@ -111,24 +111,24 @@ EblPrintBlkIoInfo (
           EfiClose (FsFile);
           break;
         }
+        EfiClose (FsFile);
       }
-      EfiClose (FsFile);
     }
   }
 
   // Print out useful Block IO media properties
-  if (File->FsBlockIoMedia.RemovableMedia) {
+  if (File->FsBlockIoMedia->RemovableMedia) {
     AsciiPrint ("Removable ");
   }
-  if (!File->FsBlockIoMedia.MediaPresent) {
-    AsciiPrint ("No Media ");
+  if (!File->FsBlockIoMedia->MediaPresent) {
+    AsciiPrint ("No Media\n");
+  } else {
+    if (File->FsBlockIoMedia->LogicalPartition) {
+      AsciiPrint ("Partition ");
+    }
+    DeviceSize = MultU64x32 (File->FsBlockIoMedia->LastBlock + 1, File->FsBlockIoMedia->BlockSize);
+    AsciiPrint ("Size = 0x%lX\n", DeviceSize);
   }
-  if (File->FsBlockIoMedia.LogicalPartition) {
-    AsciiPrint ("Partition ");
-  }
-  DeviceSize = MultU64x32 (File->FsBlockIoMedia.LastBlock + 1, File->FsBlockIoMedia.BlockSize);
-  AsciiPrint ("Size = 0x%lX\n", DeviceSize);
-
   EfiClose (File);
 }
 
diff --git a/EmbeddedPkg/Include/Library/EfiFileLib.h b/EmbeddedPkg/Include/Library/EfiFileLib.h
index d50a2f3679..9d98b19000 100644
--- a/EmbeddedPkg/Include/Library/EfiFileLib.h
+++ b/EmbeddedPkg/Include/Library/EfiFileLib.h
@@ -93,7 +93,7 @@ typedef struct {
   EFI_FILE                      *FsFileHandle;    // Information valid for Fs#:
   EFI_FILE_SYSTEM_INFO          *FsInfo;
   EFI_FILE_INFO                 *FsFileInfo;
-  EFI_BLOCK_IO_MEDIA            FsBlockIoMedia;   // Information valid for Fs#: or B#:
+  EFI_BLOCK_IO_MEDIA            *FsBlockIoMedia;  // Information valid for Fs#: or B#:
 
   UINTN                         DiskOffset;       // Information valid for B#:
 
diff --git a/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c b/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
index 8d8226d9ef..8ef0790a81 100644
--- a/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
+++ b/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
@@ -143,14 +143,41 @@ EblUpdateDeviceLists (
   EFI_STATUS                        Status;
   UINTN                             Size;
   EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Fs;
+  EFI_BLOCK_IO_PROTOCOL             *BlkIo;
   EFI_FILE_HANDLE                   Root;
   UINTN                             Index;
+  BOOLEAN                           Update;
 
   if (mBlkIo != NULL) {
     FreePool (mBlkIo);
   }
   gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo);
 
+  //
+  // This is a trick to trigger the gBS->ReinstallProtocolInterface () in a removable media 
+  // device to make a filesystem layer on. Probing devices will detect if media has been 
+  // inserted and create 
+  //
+  for (Index =0, Update = FALSE; Index < mBlkIoCount; Index++) {
+    Status = gBS->HandleProtocol (mBlkIo[Index], &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo);
+    if (!EFI_ERROR (Status)) {
+      if (BlkIo->Media->RemovableMedia) {
+        gBS->DisconnectController (mBlkIo[Index], NULL, NULL);
+        gBS->ConnectController (mBlkIo[Index], NULL, NULL, TRUE);
+        Update = TRUE;
+      }
+    }
+  }
+
+  if (Update) {
+    // In case we caused media to be detected that contains a partition (SD Card, ...) rescan
+    if (mBlkIo != NULL) {
+      FreePool (mBlkIo);
+    }
+    gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo);
+  }
+
+
   if (mFv != NULL) {
     FreePool (mFv);
   }
@@ -406,7 +433,7 @@ EblFileDevicePath (
 
   Status = gBS->HandleProtocol (File->EfiHandle, &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo);
   if (!EFI_ERROR (Status)) {
-    CopyMem (&File->FsBlockIoMedia, BlkIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
+    File->FsBlockIoMedia = BlkIo->Media;
 
     // If we are not opening the device this will get over written with file info
     File->MaxPosition = MultU64x32 (BlkIo->Media->LastBlock + 1, BlkIo->Media->BlockSize);
@@ -1395,7 +1422,7 @@ EfiRead (
   case EfiOpenBlockIo:
     Status = gBS->HandleProtocol(File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo);
     if (!EFI_ERROR(Status)) {
-      Status = DiskIo->ReadDisk(DiskIo, File->FsBlockIoMedia.MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
+      Status = DiskIo->ReadDisk(DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
     }
     File->CurrentPosition += *BufferSize;
     break;
@@ -1537,7 +1564,7 @@ EfiWrite (
 
     Status = gBS->HandleProtocol (File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo);
     if (!EFI_ERROR(Status)) {
-      Status = DiskIo->WriteDisk (DiskIo, File->FsBlockIoMedia.MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
+      Status = DiskIo->WriteDisk (DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
     }
     File->CurrentPosition += *BufferSize;
     break;
@@ -1608,7 +1635,7 @@ ExpandPath (
   CHAR8   *NewPath;
   CHAR8   *Work, *Start, *End;
   UINTN   StrLen;
-  UINTN   i;
+  INTN    i;
 
   if (Cwd == NULL || Path == NULL) {
     return NULL;