/** @file
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Implementation of BaseGpioCheckConflictLib.
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Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/GpioCheckConflictLib.h>
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#include <Uefi/UefiMultiPhase.h>
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#include <Pi/PiBootMode.h>
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#include <Pi/PiHob.h>
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#include <Library/HobLib.h>
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#include <Library/DebugLib.h>
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#include <Private/Library/GpioPrivateLib.h>
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/**
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Check Gpio PadMode conflict and report it.
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@retval none.
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**/
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VOID
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GpioCheckConflict (
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VOID
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)
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{
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EFI_HOB_GUID_TYPE *GpioCheckConflictHob;
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GPIO_PAD_MODE_INFO *GpioCheckConflictHobData;
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UINT32 HobDataSize;
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UINT32 GpioCount;
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UINT32 GpioIndex;
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GPIO_CONFIG GpioActualConfig;
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GpioCheckConflictHob = NULL;
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GpioCheckConflictHobData = NULL;
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DEBUG ((DEBUG_INFO, "GpioCheckConflict Start..\n"));
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//
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//Use Guid to find HOB.
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//
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GpioCheckConflictHob = (EFI_HOB_GUID_TYPE *) GetFirstGuidHob (&gGpioCheckConflictHobGuid);
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if (GpioCheckConflictHob == NULL) {
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DEBUG ((DEBUG_INFO, "[Gpio Hob Check] Can't find Gpio Hob.\n"));
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} else {
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while (GpioCheckConflictHob != NULL) {
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//
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// Find the Data area pointer and Data size from the Hob
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//
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GpioCheckConflictHobData = (GPIO_PAD_MODE_INFO *) GET_GUID_HOB_DATA (GpioCheckConflictHob);
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HobDataSize = GET_GUID_HOB_DATA_SIZE (GpioCheckConflictHob);
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GpioCount = HobDataSize / sizeof (GPIO_PAD_MODE_INFO);
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DEBUG ((DEBUG_INFO, "[Hob Check] Hob : GpioCount = %d\n", GpioCount));
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//
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// Probe Gpio entries in Hob and compare which are conflicted
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//
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for (GpioIndex = 0; GpioIndex < GpioCount ; GpioIndex++) {
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GpioGetPadConfig (GpioCheckConflictHobData[GpioIndex].GpioPad, &GpioActualConfig);
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if (GpioCheckConflictHobData[GpioIndex].GpioPadMode != GpioActualConfig.PadMode) {
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DEBUG ((DEBUG_ERROR, "[Gpio Check] Identified conflict on pad %a\n", GpioName (GpioCheckConflictHobData[GpioIndex].GpioPad)));
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}
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}
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//
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// Find next Hob and return the Hob pointer by the specific Hob Guid
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//
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GpioCheckConflictHob = GET_NEXT_HOB (GpioCheckConflictHob);
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GpioCheckConflictHob = GetNextGuidHob (&gGpioCheckConflictHobGuid, GpioCheckConflictHob);
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}
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DEBUG ((DEBUG_INFO, "GpioCheckConflict End.\n"));
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}
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return;
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}
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/**
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This libaray will create one Hob for each Gpio config table
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without PadMode is GpioHardwareDefault
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@param[in] GpioDefinition Point to Platform Gpio table
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@param[in] GpioTableCount Number of Gpio table entries
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@retval none.
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**/
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VOID
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CreateGpioCheckConflictHob (
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IN GPIO_INIT_CONFIG *GpioDefinition,
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IN UINT16 GpioTableCount
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)
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{
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UINT32 Index;
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UINT32 GpioIndex;
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GPIO_PAD_MODE_INFO *GpioCheckConflictHobData;
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UINT16 GpioCount;
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GpioCount = 0;
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GpioIndex = 0;
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DEBUG ((DEBUG_INFO, "CreateGpioCheckConflictHob Start \n"));
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for (Index = 0; Index < GpioTableCount ; Index++) {
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if (GpioDefinition[Index].GpioConfig.PadMode == GpioHardwareDefault) {
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continue;
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} else {
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//
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// Calculate how big size the Hob Data needs
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//
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GpioCount++;
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}
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}
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//
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// Build a HOB tagged with a GUID for identification and returns
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// the start address of GUID HOB data.
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//
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GpioCheckConflictHobData = (GPIO_PAD_MODE_INFO *) BuildGuidHob (&gGpioCheckConflictHobGuid , GpioCount * sizeof (GPIO_PAD_MODE_INFO));
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//
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// Record Non Default Gpio entries to the Hob
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//
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for (Index = 0; Index < GpioTableCount; Index++) {
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if (GpioDefinition[Index].GpioConfig.PadMode == GpioHardwareDefault) {
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continue;
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} else {
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GpioCheckConflictHobData[GpioIndex].GpioPad = GpioDefinition[Index].GpioPad;
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GpioCheckConflictHobData[GpioIndex].GpioPadMode = GpioDefinition[Index].GpioConfig.PadMode;
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GpioIndex++;
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}
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}
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DEBUG ((DEBUG_INFO, "CreateGpioCheckConflictHob End \n"));
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return;
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}
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