diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-11-01 13:16:21 +0000 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-11-17 18:48:13 +0000 |
| commit | 563c2efbfa0580f4a1efee368cfc77d27bf33a1f (patch) | |
| tree | d978fee4c97c7a3a08ae6c95c7084a4b4b909f5d /Silicon/Socionext | |
| parent | 4499be3aa0e44a291268f88cd5ea23666a5c5158 (diff) | |
| download | edk2-platforms-563c2efbfa0580f4a1efee368cfc77d27bf33a1f.tar.xz | |
Silicon/SynQuacer: implement PEIM that exposes GPIO PPI
In order to be able to sample the state of the DIP switches at early
boot on the Developer Box platform, implement the GPIO PPI based on
the GPIO block that is implemented in the SynQuacer SoC.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Diffstat (limited to 'Silicon/Socionext')
| -rw-r--r-- | Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.c | 203 | ||||
| -rw-r--r-- | Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf | 47 |
2 files changed, 250 insertions, 0 deletions
diff --git a/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.c b/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.c new file mode 100644 index 0000000000..24d08b4e58 --- /dev/null +++ b/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.c @@ -0,0 +1,203 @@ +/** @file
+
+ Copyright (c) 2017, Linaro, Ltd. 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 <PiPei.h>
+#include <Library/IoLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Platform/MemoryMap.h>
+#include <Ppi/EmbeddedGpio.h>
+
+#define PDR(x) (SYNQUACER_GPIO_BASE + 4 * (GPIO_PIN (x) >> 3))
+#define DDR(x) (SYNQUACER_GPIO_BASE + 0x10 + 4 * (GPIO_PIN (x) >> 3))
+#define PFR(x) (SYNQUACER_GPIO_BASE + 0x20 + 4 * (GPIO_PIN (x) >> 3))
+
+#define GPIO_BIT(x) (1U << (GPIO_PIN (x) % 8))
+
+STATIC CONST UINTN mGpioPinCount = 32;
+
+/**
+
+ Gets the state of a GPIO pin
+
+ @param This Pointer to protocol
+ @param Gpio Which pin to read
+ @param Value State of the pin
+
+ @retval EFI_SUCCESS GPIO state returned in Value
+ @retval EFI_INVALID_PARAMETER Value is NULL
+ @retval EFI_NOT_FOUND Pin does not exit
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GpioGet (
+ IN EMBEDDED_GPIO_PPI *This,
+ IN EMBEDDED_GPIO_PIN Gpio,
+ OUT UINTN *Value
+ )
+{
+ if (Value == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ if (GPIO_PORT (Gpio) > 0 || GPIO_PIN (Gpio) >= mGpioPinCount) {
+ return EFI_NOT_FOUND;
+ }
+
+ *Value = ((MmioRead32 (PDR (GPIO_PIN (Gpio))) & GPIO_BIT (Gpio)) != 0);
+
+ return EFI_SUCCESS;
+}
+
+/**
+
+ Sets the state of a GPIO pin
+
+ @param This Pointer to protocol
+ @param Gpio Which pin to modify
+ @param Mode Mode to set
+
+ @retval EFI_SUCCESS GPIO set as requested
+ @retval EFI_INVALID_PARAMETER Invalid mode
+ @retval EFI_NOT_FOUND Pin does not exit
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GpioSet (
+ IN EMBEDDED_GPIO_PPI *This,
+ IN EMBEDDED_GPIO_PIN Gpio,
+ IN EMBEDDED_GPIO_MODE Mode
+ )
+{
+ if (GPIO_PORT (Gpio) > 0 || GPIO_PIN (Gpio) >= mGpioPinCount) {
+ return EFI_NOT_FOUND;
+ }
+
+ switch (Mode) {
+ case GPIO_MODE_INPUT:
+ MmioAnd32 (DDR (GPIO_PIN (Gpio)), ~GPIO_BIT (Gpio));
+ break;
+
+ case GPIO_MODE_OUTPUT_0:
+ MmioOr32 (DDR (GPIO_PIN (Gpio)), GPIO_BIT (Gpio));
+ MmioAnd32 (PDR (GPIO_PIN (Gpio)), ~GPIO_BIT (Gpio));
+ break;
+
+ case GPIO_MODE_OUTPUT_1:
+ MmioOr32 (DDR (GPIO_PIN (Gpio)), GPIO_BIT (Gpio));
+ MmioOr32 (PDR (GPIO_PIN (Gpio)), GPIO_BIT (Gpio));
+ break;
+
+ default:
+ return EFI_INVALID_PARAMETER;
+ }
+ return EFI_SUCCESS;
+}
+
+
+/**
+
+ Gets the mode (function) of a GPIO pin
+
+ @param This Pointer to protocol
+ @param Gpio Which pin
+ @param Mode Pointer to output mode value
+
+ @retval EFI_SUCCESS Mode value retrieved
+ @retval EFI_INVALID_PARAMETER Mode is NULL
+ @retval EFI_NOT_FOUND Pin does not exit
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GpioGetMode (
+ IN EMBEDDED_GPIO_PPI *This,
+ IN EMBEDDED_GPIO_PIN Gpio,
+ OUT EMBEDDED_GPIO_MODE *Mode
+ )
+{
+ if (Mode == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ if (GPIO_PORT (Gpio) > 0 || GPIO_PIN (Gpio) >= mGpioPinCount) {
+ return EFI_NOT_FOUND;
+ }
+
+ if (!(MmioRead32 (DDR (GPIO_PIN (Gpio))) & GPIO_BIT (Gpio))) {
+ *Mode = GPIO_MODE_INPUT;
+ } else if (!(MmioRead32 (PDR (GPIO_PIN (Gpio))) & GPIO_BIT (Gpio))) {
+ *Mode = GPIO_MODE_OUTPUT_0;
+ } else {
+ *Mode = GPIO_MODE_OUTPUT_1;
+ }
+ return EFI_SUCCESS;
+}
+
+
+/**
+
+ Sets the pull-up / pull-down resistor of a GPIO pin
+
+ @param This Pointer to PPI
+ @param Gpio Port/pin index
+ @param Pull The pullup/pulldown mode to set
+
+ @retval EFI_SUCCESS Mode was set
+ @retval EFI_NOT_FOUND Pin does not exist
+ @retval EFI_UNSUPPORTED Action not supported
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GpioSetPull (
+ IN EMBEDDED_GPIO_PPI *This,
+ IN EMBEDDED_GPIO_PIN Gpio,
+ IN EMBEDDED_GPIO_PULL Pull
+ )
+{
+ if (Pull != GPIO_PULL_NONE) {
+ return EFI_UNSUPPORTED;
+ }
+ if (GPIO_PORT (Gpio) > 0 || GPIO_PIN (Gpio) >= mGpioPinCount) {
+ return EFI_NOT_FOUND;
+ }
+ return EFI_SUCCESS;
+}
+
+STATIC EMBEDDED_GPIO_PPI mGpioPpi = {
+ GpioGet,
+ GpioSet,
+ GpioGetMode,
+ GpioSetPull,
+};
+
+STATIC CONST EFI_PEI_PPI_DESCRIPTOR mEmbeddedGpioPpiDescriptor = {
+ EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
+ &gEdkiiEmbeddedGpioPpiGuid,
+ &mGpioPpi
+};
+
+EFI_STATUS
+EFIAPI
+SynQuacerGpioPeiEntryPoint (
+ IN EFI_PEI_FILE_HANDLE FfsHeader,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ return PeiServicesInstallPpi (&mEmbeddedGpioPpiDescriptor);
+}
diff --git a/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf b/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf new file mode 100644 index 0000000000..dbb5e9d4c5 --- /dev/null +++ b/Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf @@ -0,0 +1,47 @@ +#/* @file
+#
+# Copyright (c) 2017, Linaro, Ltd. 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 = 0x0001001A
+ BASE_NAME = SynQuacerGpioPei
+ FILE_GUID = 55a981a5-f371-4ba3-93a5-37fa0ca95089
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ ENTRY_POINT = SynQuacerGpioPeiEntryPoint
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = AARCH64
+#
+#
+
+[Sources]
+ SynQuacerGpioPei.c
+
+[Packages]
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/Socionext/SynQuacer/SynQuacer.dec
+
+[LibraryClasses]
+ IoLib
+ PeimEntryPoint
+ PeiServicesLib
+
+[Ppis]
+ gEdkiiEmbeddedGpioPpiGuid ## PRODUCES
+
+[Depex]
+ TRUE
|