/** @file
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*
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* Copyright 2020 NXP
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/SocLib.h>
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#include <Soc.h>
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/**
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Set PCDs for PCIe controller based on SoC version.
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LX2160-Rev1 and LX2160-Rev2 has different PCIe controller. This function
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check the SoC version and set PCDs for PCIe controller which will be
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used by PciHostBridgeLib and PciSegmentLib for controller initialization.
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@return EFI_SUCCESS PCDs were set successfully
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@return EFI_INVALID_PARAMETER Invalid major version number
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**/
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EFI_STATUS
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SetPciControllerPcdOptions (
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VOID
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)
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{
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UINT32 Svr;
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Svr = SocGetSvr ();
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if (SVR_SOC_VER(Svr) == SVR_LX2160A) {
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switch (SVR_MAJOR(Svr)) {
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case 0x1:
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//
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// LX2160-Rev1 and LX2160-Rev2 has different PCIe controllers.
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// Set PcdPciLsGen4Ctrl to TRUE for LX2160-Rev1, which will be used
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// by PciHostBridgeLib and PciSegmentLib to differentiate both controllers
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// and perform controller specific initialization.
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//
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PcdSetBoolS (PcdPciLsGen4Ctrl, TRUE);
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break;
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case 0x2:
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//
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// PCIe controller in LX2160-Rev2 supports two methods for config
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// transactions.
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// 1 - Default (Non ECAM compliant): PCIe controller
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// requires target BDF to be written to bit[31:16] of type0/type1
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// outbound window.
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// 2 - CFG SHIFT: PCIe controller shifts BDF from bits[27:12] to
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// bits[31:16] and supports Enhanced Configuration Address Mapping (ECAM)
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// mechanism.
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//
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// Set PcdPciCfgShiftEnable to TRUE for LX2160-Rev2, which will be used by
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// PciHostBridgeLib and PciSegmentLib to enable CFG SHIFT feature on
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// PCIe controller and program the iATU windows accordingly.
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//
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PcdSetBoolS (PcdPciCfgShiftEnable, TRUE);
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//
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// PCIe controller in LX2160-Rev2 is not ECAM-compliant for bus0.
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// Set PcdPciHideRootPort for LX2160-Rev2, which will be used by
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// PciHostBridgeLib and PciSegmentLib to program iATU windows accordingly.
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//
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PcdSetBoolS (PcdPciHideRootPort, TRUE);
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break;
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default:
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DEBUG ((DEBUG_ERROR, "%a: Invalid SoC Version 0x%x \n", __FUNCTION__,
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SVR_MAJOR(Svr)));
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return EFI_INVALID_PARAMETER;
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}
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}
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return EFI_SUCCESS;
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}
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/**
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The entry point for PlatformDxe driver. This driver
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intends to perform platform specific initialization.
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@param[in] ImageHandle The image handle of the driver.
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@param[in] SystemTable The system table.
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@retval EFI_SUCCESS Driver initialization success.
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**/
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EFI_STATUS
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EFIAPI
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PlatformDxeEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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// Set PCDs for PCIe controller
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Status = SetPciControllerPcdOptions ();
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return Status;
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}
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