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author | AJFISH <AJFISH@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-06 01:57:05 +0000 |
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committer | AJFISH <AJFISH@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-06 01:57:05 +0000 |
commit | 2ef2b01e07c02db339f34004445734a2dbdd80e1 (patch) | |
tree | 19532a6be8d8bdb0aef04bd00c1efb582f6dc841 /BeagleBoardPkg/Gpio/Gpio.c | |
parent | f7753a96ba1653ddd31b01c198a352f6332ac404 (diff) | |
download | edk2-platforms-2ef2b01e07c02db339f34004445734a2dbdd80e1.tar.xz |
Adding support for BeagleBoard.
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers.
EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell.
BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine).
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'BeagleBoardPkg/Gpio/Gpio.c')
-rw-r--r-- | BeagleBoardPkg/Gpio/Gpio.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/BeagleBoardPkg/Gpio/Gpio.c b/BeagleBoardPkg/Gpio/Gpio.c new file mode 100644 index 0000000000..7bc5478933 --- /dev/null +++ b/BeagleBoardPkg/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; +} |