[PATCH edk2-platforms v4 6/6] Platform/HiKey: enable virtual keyboard

[Haojian Zhuang <haojian.zhuang@linaro.org>]

Enable virtual keyboard on HiKey platform. It detects the pattern
in memory and GPIO pin setting, and simulates them into virtual
key.

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/HiKey/HiKey.dsc             |  5 ++
 Platform/Hisilicon/HiKey/HiKey.fdf             |  5 ++
 Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.c   | 98 ++++++++++++++++++++++++++
 Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf |  5 ++
 4 files changed, 113 insertions(+)

diff --git a/Platform/Hisilicon/HiKey/HiKey.dsc b/Platform/Hisilicon/HiKey/HiKey.dsc
index 5cc4ff27f01b..83dd68a820b1 100644
--- a/Platform/Hisilicon/HiKey/HiKey.dsc
+++ b/Platform/Hisilicon/HiKey/HiKey.dsc
@@ -192,6 +192,11 @@ [Components.common]
   Platform/Hisilicon/HiKey/HiKeyGpioDxe/HiKeyGpioDxe.inf
   ArmPlatformPkg/Drivers/PL061GpioDxe/PL061GpioDxe.inf
 
+  #
+  # Virtual Keyboard
+  #
+  EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboardDxe.inf
+
   Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf
 
   #
diff --git a/Platform/Hisilicon/HiKey/HiKey.fdf b/Platform/Hisilicon/HiKey/HiKey.fdf
index 39020d27dbcd..2bca7232b6e5 100644
--- a/Platform/Hisilicon/HiKey/HiKey.fdf
+++ b/Platform/Hisilicon/HiKey/HiKey.fdf
@@ -123,6 +123,11 @@ [FV.FvMain]
   INF Platform/Hisilicon/HiKey/HiKeyGpioDxe/HiKeyGpioDxe.inf
   INF ArmPlatformPkg/Drivers/PL061GpioDxe/PL061GpioDxe.inf
 
+  #
+  # Virtual Keyboard
+  #
+  INF EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboardDxe.inf
+
   INF Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf
 
   #
diff --git a/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.c b/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.c
index 19987e0b29c3..8f4f9157835c 100644
--- a/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.c
+++ b/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.c
@@ -12,10 +12,15 @@
 *
 **/
 
+#include <Library/CacheMaintenanceLib.h>
 #include <Library/DebugLib.h>
 #include <Library/IoLib.h>
+#include <Library/UefiBootServicesTableLib.h>
 #include <Library/UefiLib.h>
 
+#include <Protocol/EmbeddedGpio.h>
+#include <Protocol/PlatformVirtualKeyboard.h>
+
 #include <Hi6220.h>
 #include <Hi6220RegsPeri.h>
 
@@ -31,6 +36,8 @@
 #define ADB_REBOOT_BOOTLOADER            0x77665500
 #define ADB_REBOOT_NONE                  0x77665501
 
+STATIC EMBEDDED_GPIO        *mGpio;
+
 STATIC
 VOID
 UartInit (
@@ -104,6 +111,90 @@ HiKeyInitPeripherals (
 
 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;
+  }
+  Status = mGpio->Set (mGpio, DETECT_J15_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_J15_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
 HiKeyEntryPoint (
   IN EFI_HANDLE         ImageHandle,
   IN EFI_SYSTEM_TABLE   *SystemTable
@@ -115,5 +206,12 @@ HiKeyEntryPoint (
   if (EFI_ERROR (Status)) {
     return Status;
   }
+
+  Status = gBS->InstallProtocolInterface (
+                  &ImageHandle,
+                  &gPlatformVirtualKeyboardProtocolGuid,
+                  EFI_NATIVE_INTERFACE,
+                  &mVirtualKeyboard
+                  );
   return Status;
 }
diff --git a/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf b/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf
index 34734391b45a..41aa7f8081ed 100644
--- a/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf
+++ b/Platform/Hisilicon/HiKey/HiKeyDxe/HiKeyDxe.inf
@@ -28,11 +28,16 @@ [Packages]
   MdePkg/MdePkg.dec
 
 [LibraryClasses]
+  CacheMaintenanceLib
   DebugLib
   IoLib
   UefiLib
   UefiDriverEntryPoint
 
+[Protocols]
+  gEmbeddedGpioProtocolGuid
+  gPlatformVirtualKeyboardProtocolGuid
+
 [Guids]
   gEfiEndOfDxeEventGroupGuid
 
-- 
2.7.4