1 files changed, 135 insertions, 0 deletions
diff --git a/Omap44xxPkg/Gpio/Gpio.c b/Omap44xxPkg/Gpio/Gpio.c
new file mode 100644
index 000000000..282722268
--- /dev/null
+++ b/Omap44xxPkg/Gpio/Gpio.c
@@ -0,0 +1,135 @@
+/** @file
+
+  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+  
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Uefi.h>
+
+#include <Library/IoLib.h>
+#include <Library/OmapLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/EmbeddedGpio.h>
+
+#include <Omap4430/Omap4430.h>
+
+EFI_STATUS
+Get (
+  IN  EMBEDDED_GPIO     *This,
+  IN  EMBEDDED_GPIO_PIN Gpio,
+  OUT UINTN               *Value
+  )
+{
+  UINTN  Port;
+  UINTN  Pin;
+  UINT32 DataInRegister;
+
+  if (Value == NULL)
+  {
+    return EFI_UNSUPPORTED;
+  }
+
+  Port    = GPIO_PORT(Gpio);
+  Pin     = GPIO_PIN(Gpio);
+
+  DataInRegister = GpioBase(Port) + GPIO_DATAIN;
+
+  if (MmioRead32 (DataInRegister) & GPIO_DATAIN_MASK(Pin)) {
+    *Value = 1;
+  } else {
+    *Value = 0;
+  }
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+Set (
+  IN  EMBEDDED_GPIO       *This,
+  IN  EMBEDDED_GPIO_PIN   Gpio,
+  IN  EMBEDDED_GPIO_MODE  Mode
+  )
+{
+  UINTN  Port;
+  UINTN  Pin;
+  UINT32 OutputEnableRegister;
+  UINT32 SetDataOutRegister;
+  UINT32 ClearDataOutRegister;
+
+  Port    = GPIO_PORT(Gpio);
+  Pin     = GPIO_PIN(Gpio);
+
+  OutputEnableRegister = GpioBase(Port) + GPIO_OE;
+  SetDataOutRegister   = GpioBase(Port) + GPIO_SETDATAOUT;
+  ClearDataOutRegister = GpioBase(Port) + GPIO_CLEARDATAOUT;
+
+  switch (Mode)
+  {
+    case GPIO_MODE_INPUT:
+      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_INPUT(Pin));
+      break;
+
+    case GPIO_MODE_OUTPUT_0:
+      MmioWrite32 (ClearDataOutRegister, GPIO_CLEARDATAOUT_BIT(Pin));
+      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));
+      break;
+
+    case GPIO_MODE_OUTPUT_1:
+      MmioWrite32 (SetDataOutRegister, GPIO_SETDATAOUT_BIT(Pin));
+      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));
+      break;
+
+    default:
+      return EFI_UNSUPPORTED;
+  }
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+GetMode (
+  IN  EMBEDDED_GPIO       *This,
+  IN  EMBEDDED_GPIO_PIN   Gpio,
+  OUT EMBEDDED_GPIO_MODE  *Mode
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+EFI_STATUS
+SetPull (
+  IN  EMBEDDED_GPIO       *This,
+  IN  EMBEDDED_GPIO_PIN   Gpio,
+  IN  EMBEDDED_GPIO_PULL  Direction
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+EMBEDDED_GPIO Gpio = {
+  Get,
+  Set,
+  GetMode,
+  SetPull
+};
+
+EFI_STATUS
+GpioInitialize (
+  IN EFI_HANDLE         ImageHandle,
+  IN EFI_SYSTEM_TABLE   *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+  
+  Status = gBS->InstallMultipleProtocolInterfaces(&ImageHandle, &gEmbeddedGpioProtocolGuid, &Gpio, NULL);
+  return Status;
+}