mirror of https://github.com/acidanthera/audk.git
136 lines
2.8 KiB
C
136 lines
2.8 KiB
C
/** @file
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Copyright (c) 2008-2009, Apple Inc. All rights reserved.
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Library/IoLib.h>
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#include <Library/OmapLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/EmbeddedGpio.h>
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#include <Omap3530/Omap3530.h>
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EFI_STATUS
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Get (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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OUT UINTN *Value
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)
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{
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UINTN Port;
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UINTN Pin;
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UINT32 DataInRegister;
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if (Value == NULL)
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{
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return EFI_UNSUPPORTED;
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}
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Port = GPIO_PORT(Gpio);
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Pin = GPIO_PIN(Gpio);
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DataInRegister = GpioBase(Port) + GPIO_DATAIN;
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if (MmioRead32(DataInRegister) & GPIO_DATAIN_MASK(Pin)) {
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*Value = 1;
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} else {
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*Value = 0;
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}
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return EFI_SUCCESS;
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}
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EFI_STATUS
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Set (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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IN EMBEDDED_GPIO_MODE Mode
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)
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{
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UINTN Port;
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UINTN Pin;
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UINT32 OutputEnableRegister;
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UINT32 SetDataOutRegister;
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UINT32 ClearDataOutRegister;
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Port = GPIO_PORT(Gpio);
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Pin = GPIO_PIN(Gpio);
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OutputEnableRegister = GpioBase(Port) + GPIO_OE;
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SetDataOutRegister = GpioBase(Port) + GPIO_SETDATAOUT;
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ClearDataOutRegister = GpioBase(Port) + GPIO_CLEARDATAOUT;
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switch (Mode)
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{
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case GPIO_MODE_INPUT:
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MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_INPUT(Pin));
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break;
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case GPIO_MODE_OUTPUT_0:
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MmioWrite32(ClearDataOutRegister, GPIO_CLEARDATAOUT_BIT(Pin));
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MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));
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break;
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case GPIO_MODE_OUTPUT_1:
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MmioWrite32(SetDataOutRegister, GPIO_SETDATAOUT_BIT(Pin));
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MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));
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break;
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default:
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return EFI_UNSUPPORTED;
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}
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return EFI_SUCCESS;
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}
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EFI_STATUS
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GetMode (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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OUT EMBEDDED_GPIO_MODE *Mode
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)
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{
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return EFI_UNSUPPORTED;
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}
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EFI_STATUS
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SetPull (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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IN EMBEDDED_GPIO_PULL Direction
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)
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{
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return EFI_UNSUPPORTED;
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}
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EMBEDDED_GPIO Gpio = {
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Get,
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Set,
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GetMode,
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SetPull
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};
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EFI_STATUS
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GpioInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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Status = gBS->InstallMultipleProtocolInterfaces(&ImageHandle, &gEmbeddedGpioProtocolGuid, &Gpio, NULL);
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return Status;
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}
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