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author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-01-28 21:32:01 +0000 |
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committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-01-28 21:32:01 +0000 |
commit | a3f98646f68239bf9c577b24689bc69cbcde1b47 (patch) | |
tree | 5aadfc72e0170e433b621de4da245a906c8c13f6 /Omap35xxPkg/Gpio/Gpio.c | |
parent | 759f21f1d17ce52a05eea31e9ddd1efb4ec68bbb (diff) | |
download | edk2-platforms-a3f98646f68239bf9c577b24689bc69cbcde1b47.tar.xz |
Moving OMAP 3530 code out of BeagleBoard package into its own package
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9854 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'Omap35xxPkg/Gpio/Gpio.c')
-rw-r--r-- | Omap35xxPkg/Gpio/Gpio.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/Omap35xxPkg/Gpio/Gpio.c b/Omap35xxPkg/Gpio/Gpio.c new file mode 100644 index 0000000000..7bc5478933 --- /dev/null +++ b/Omap35xxPkg/Gpio/Gpio.c @@ -0,0 +1,135 @@ +/** @file + + Copyright (c) 2008-2009, Apple Inc. All rights reserved. + + All rights reserved. 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 <Omap3530/Omap3530.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; +} |