QuarkPlatformPkg/Library/PlatformPcieHelperLib/PlatformPcieHelperLib.c

   1 /** @file
   2 Platform Pcie Helper Lib.
   3
   4 Copyright (c) 2013 Intel Corporation.
   5
   6 This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT 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 //
  21 VOID
  22 LegacyGpioSetLevel (
  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 **/
  55 VOID
  56 EFIAPI
  57 PlatformPERSTAssert (
  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 **/
  74 VOID
  75 EFIAPI
  76 PlatformPERSTDeAssert (
  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 **/
  94 EFI_STATUS
  95 EFIAPI
  96 PlatformPciExpressEarlyInit (
  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