1/** @file 2Platform Pcie Helper Lib. 3 4Copyright (c) 2013 Intel Corporation. 5 6This program and the accompanying materials 7are licensed and made available under the terms and conditions of the BSD License 8which accompanies this distribution. The full text of the license may be found at 9http://opensource.org/licenses/bsd-license.php 10 11THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14**/ 15 16#include "CommonHeader.h" 17 18// 19// Routines local to this source module. 20// 21VOID 22LegacyGpioSetLevel ( 23 IN CONST UINT32 LevelRegOffset, 24 IN CONST UINT32 GpioNum, 25 IN CONST BOOLEAN HighLevel 26 ) 27{ 28 UINT32 RegValue; 29 UINT32 GpioBaseAddress; 30 UINT32 GpioNumMask; 31 32 GpioBaseAddress = LpcPciCfg32 (R_QNC_LPC_GBA_BASE) & B_QNC_LPC_GPA_BASE_MASK; 33 ASSERT (GpioBaseAddress > 0); 34 35 RegValue = IoRead32 (GpioBaseAddress + LevelRegOffset); 36 GpioNumMask = (1 << GpioNum); 37 if (HighLevel) { 38 RegValue |= (GpioNumMask); 39 } else { 40 RegValue &= ~(GpioNumMask); 41 } 42 IoWrite32 (GpioBaseAddress + R_QNC_GPIO_RGLVL_RESUME_WELL, RegValue); 43} 44 45// 46// Routines exported by this component. 47// 48 49/** 50 Platform assert PCI express PERST# signal. 51 52 @param PlatformType See EFI_PLATFORM_TYPE enum definitions. 53 54**/ 55VOID 56EFIAPI 57PlatformPERSTAssert ( 58 IN CONST EFI_PLATFORM_TYPE PlatformType 59 ) 60{ 61 if (PlatformType == GalileoGen2) { 62 LegacyGpioSetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL, GALILEO_GEN2_PCIEXP_PERST_RESUMEWELL_GPIO, FALSE); 63 } else { 64 LegacyGpioSetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL, PCIEXP_PERST_RESUMEWELL_GPIO, FALSE); 65 } 66} 67 68/** 69 Platform de assert PCI express PERST# signal. 70 71 @param PlatformType See EFI_PLATFORM_TYPE enum definitions. 72 73**/ 74VOID 75EFIAPI 76PlatformPERSTDeAssert ( 77 IN CONST EFI_PLATFORM_TYPE PlatformType 78 ) 79{ 80 if (PlatformType == GalileoGen2) { 81 LegacyGpioSetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL, GALILEO_GEN2_PCIEXP_PERST_RESUMEWELL_GPIO, TRUE); 82 } else { 83 LegacyGpioSetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL, PCIEXP_PERST_RESUMEWELL_GPIO, TRUE); 84 } 85} 86 87/** Early initialisation of the PCIe controller. 88 89 @param PlatformType See EFI_PLATFORM_TYPE enum definitions. 90 91 @retval EFI_SUCCESS Operation success. 92 93**/ 94EFI_STATUS 95EFIAPI 96PlatformPciExpressEarlyInit ( 97 IN CONST EFI_PLATFORM_TYPE PlatformType 98 ) 99{ 100 101 // 102 // Release and wait for PCI controller to come out of reset. 103 // 104 SocUnitReleasePcieControllerPreWaitPllLock (PlatformType); 105 MicroSecondDelay (PCIEXP_DELAY_US_WAIT_PLL_LOCK); 106 SocUnitReleasePcieControllerPostPllLock (PlatformType); 107 108 // 109 // Early PCIe initialisation 110 // 111 SocUnitEarlyInitialisation (); 112 113 // 114 // Do North cluster early PCIe init. 115 // 116 PciExpressEarlyInit (); 117 118 return EFI_SUCCESS; 119} 120 121