Enable virtual keyboard on HiKey960 platform. It checks two
conditions, such as pattern in memory and GPIO pin setting.

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
---
 Platform/Hisilicon/HiKey960/HiKey960.dsc           |  5 ++
 Platform/Hisilicon/HiKey960/HiKey960.fdf           |  5 ++
 .../Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c   | 98 +++++++++++++++++++++-
 .../Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.h   |  3 +
 .../Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf |  1 +
 5 files changed, 111 insertions(+), 1 deletion(-)

diff --git a/Platform/Hisilicon/HiKey960/HiKey960.dsc b/Platform/Hisilicon/HiKey960/HiKey960.dsc
index 6cc1c1edf453..79e68754976d 100644
--- a/Platform/Hisilicon/HiKey960/HiKey960.dsc
+++ b/Platform/Hisilicon/HiKey960/HiKey960.dsc
@@ -182,6 +182,11 @@ [Components.common]
   Platform/Hisilicon/HiKey960/HiKey960GpioDxe/HiKey960GpioDxe.inf
   ArmPlatformPkg/Drivers/PL061GpioDxe/PL061GpioDxe.inf
 
+  #
+  # Virtual Keyboard
+  #
+  EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboardDxe.inf
+
   Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf
 
   #
diff --git a/Platform/Hisilicon/HiKey960/HiKey960.fdf b/Platform/Hisilicon/HiKey960/HiKey960.fdf
index b7d70b010598..d65f77878575 100644
--- a/Platform/Hisilicon/HiKey960/HiKey960.fdf
+++ b/Platform/Hisilicon/HiKey960/HiKey960.fdf
@@ -123,6 +123,11 @@ [FV.FvMain]
   INF Platform/Hisilicon/HiKey960/HiKey960GpioDxe/HiKey960GpioDxe.inf
   INF ArmPlatformPkg/Drivers/PL061GpioDxe/PL061GpioDxe.inf
 
+  #
+  # Virtual Keyboard
+  #
+  INF EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboardDxe.inf
+
   INF Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf
 
   #
diff --git a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c
index fc4cc24724e5..400f6d0196eb 100644
--- a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c
+++ b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c
@@ -14,7 +14,8 @@
 
 #include "HiKey960Dxe.h"
 
-STATIC UINTN    mBoardId;
+STATIC UINTN           mBoardId;
+STATIC EMBEDDED_GPIO   *mGpio;
 
 STATIC
 VOID
@@ -315,6 +316,94 @@ OnEndOfDxe (
 
 EFI_STATUS
 EFIAPI
+VirtualKeyboardRegister (
+  IN VOID
+  )
+{
+  EFI_STATUS           Status;
+
+  Status = gBS->LocateProtocol (
+                  &gEmbeddedGpioProtocolGuid,
+                  NULL,
+                  (VOID **) &mGpio
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtualKeyboardReset (
+  IN VOID
+  )
+{
+  EFI_STATUS           Status;
+
+  if (mGpio == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+  //
+  // Configure GPIO68 as GPIO function
+  //
+  MmioWrite32 (0xe896c108, 0);
+  Status = mGpio->Set (mGpio, DETECT_SW_FASTBOOT, GPIO_MODE_INPUT);
+  return Status;
+}
+
+BOOLEAN
+EFIAPI
+VirtualKeyboardQuery (
+  IN VIRTUAL_KBD_KEY             *VirtualKey
+  )
+{
+  EFI_STATUS           Status;
+  UINTN                Value = 0;
+
+  if ((VirtualKey == NULL) || (mGpio == NULL)) {
+    return FALSE;
+  }
+  if (MmioRead32 (ADB_REBOOT_ADDRESS) == ADB_REBOOT_BOOTLOADER) {
+    goto Done;
+  } else {
+    Status = mGpio->Get (mGpio, DETECT_SW_FASTBOOT, &Value);
+    if (EFI_ERROR (Status) || (Value != 0)) {
+      return FALSE;
+    }
+  }
+Done:
+  VirtualKey->Signature = VIRTUAL_KEYBOARD_KEY_SIGNATURE;
+  VirtualKey->Key.ScanCode = SCAN_NULL;
+  VirtualKey->Key.UnicodeChar = L'f';
+  return TRUE;
+}
+
+EFI_STATUS
+EFIAPI
+VirtualKeyboardClear (
+  IN VIRTUAL_KBD_KEY            *VirtualKey
+  )
+{
+  if (VirtualKey == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+  if (MmioRead32 (ADB_REBOOT_ADDRESS) == ADB_REBOOT_BOOTLOADER) {
+    MmioWrite32 (ADB_REBOOT_ADDRESS, ADB_REBOOT_NONE);
+    WriteBackInvalidateDataCacheRange ((VOID *)ADB_REBOOT_ADDRESS, 4);
+  }
+  return EFI_SUCCESS;
+}
+
+PLATFORM_VIRTUAL_KBD_PROTOCOL mVirtualKeyboard = {
+  VirtualKeyboardRegister,
+  VirtualKeyboardReset,
+  VirtualKeyboardQuery,
+  VirtualKeyboardClear
+};
+
+EFI_STATUS
+EFIAPI
 HiKey960EntryPoint (
   IN EFI_HANDLE         ImageHandle,
   IN EFI_SYSTEM_TABLE   *SystemTable
@@ -348,5 +437,12 @@ HiKey960EntryPoint (
   if (EFI_ERROR (Status)) {
     return Status;
   }
+
+  Status = gBS->InstallProtocolInterface (
+                  &ImageHandle,
+                  &gPlatformVirtualKeyboardProtocolGuid,
+                  EFI_NATIVE_INTERFACE,
+                  &mVirtualKeyboard
+                  );
   return Status;
 }
diff --git a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.h b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.h
index 2e89d10e2723..2d5349888ed5 100644
--- a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.h
+++ b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.h
@@ -33,6 +33,9 @@
 #include <Library/TimerLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 
+#include <Protocol/EmbeddedGpio.h>
+#include <Protocol/PlatformVirtualKeyboard.h>
+
 #define ADC_ADCIN0                       0
 #define ADC_ADCIN1                       1
 #define ADC_ADCIN2                       2
diff --git a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf
index a1a7d005ce8b..46a9a5803e3d 100644
--- a/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf
+++ b/Platform/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.inf
@@ -39,6 +39,7 @@ [LibraryClasses]
 
 [Protocols]
   gEmbeddedGpioProtocolGuid
+  gPlatformVirtualKeyboardProtocolGuid
 
 [Guids]
   gEfiEndOfDxeEventGroupGuid
-- 
2.7.4

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