diff options
Diffstat (limited to 'Omap44xxPkg/Gpio')
| -rw-r--r-- | Omap44xxPkg/Gpio/Gpio.c | 135 | ||||
| -rw-r--r-- | Omap44xxPkg/Gpio/Gpio.inf | 45 |
2 files changed, 180 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; +} diff --git a/Omap44xxPkg/Gpio/Gpio.inf b/Omap44xxPkg/Gpio/Gpio.inf new file mode 100644 index 000000000..89ab02167 --- /dev/null +++ b/Omap44xxPkg/Gpio/Gpio.inf @@ -0,0 +1,45 @@ +#/** @file +# +# Copyright (c) 2008 - 2010, 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. +# +#**/ + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = Gpio + FILE_GUID = E7D9CAE1-6930-46E3-BDF9-0027446E7DF2 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + + ENTRY_POINT = GpioInitialize + + +[Sources.common] + Gpio.c + +[Packages] + MdePkg/MdePkg.dec + EmbeddedPkg/EmbeddedPkg.dec + Omap44xxPkg/Omap44xxPkg.dec + +[LibraryClasses] + IoLib + UefiDriverEntryPoint + OmapLib + +[Guids] + +[Protocols] + gEmbeddedGpioProtocolGuid + +[Pcd] + +[depex] + TRUE
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