[PATCH v4 1/2] MdeModulePkg/SdMmcPciHcDxe: Declare V4 64 bit address capability

[Ashish Singhal <ashishsingha@nvidia.com>]

Add capability declaration for V4.x 64 bit system address support.
This would be used for host controllers working in version 4. Enable
64 bit DMA support in PCI layer if V3 or V4 64 bit support is
enabled in host capability register.

The usage of this new field does not need a guard for version check as
spec for previous SDMMC versions defines this field as reserved with
default value of 0.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1359

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ashish Singhal <ashishsingha@nvidia.com>
---
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c |  3 ++-
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c   |  3 ++-
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h   | 10 +++++-----
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c
index a87f8de..c6c6494 100644
--- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c
+++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c
@@ -649,7 +649,8 @@ SdMmcPciHcDriverBindingStart (
       Private->BaseClkFreq[Slot]
       ));
 
-    Support64BitDma &= Private->Capability[Slot].SysBus64;
+    Support64BitDma &= (Private->Capability[Slot].SysBus64V3 |
+                        Private->Capability[Slot].SysBus64V4);
 
     Status = SdMmcHcGetMaxCurrent (PciIo, Slot, &Private->MaxCurrent[Slot]);
     if (EFI_ERROR (Status)) {
diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c
index ddf6dcf..598b6a3 100644
--- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c
+++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c
@@ -45,7 +45,8 @@ DumpCapabilityReg (
   DEBUG ((DEBUG_INFO, "   Voltage 3.3       %a\n", Capability->Voltage33 ? "TRUE" : "FALSE"));
   DEBUG ((DEBUG_INFO, "   Voltage 3.0       %a\n", Capability->Voltage30 ? "TRUE" : "FALSE"));
   DEBUG ((DEBUG_INFO, "   Voltage 1.8       %a\n", Capability->Voltage18 ? "TRUE" : "FALSE"));
-  DEBUG ((DEBUG_INFO, "   64-bit Sys Bus    %a\n", Capability->SysBus64 ? "TRUE" : "FALSE"));
+  DEBUG ((DEBUG_INFO, "   V4 64-bit Sys Bus %a\n", Capability->SysBus64V4 ? "TRUE" : "FALSE"));
+  DEBUG ((DEBUG_INFO, "   V3 64-bit Sys Bus %a\n", Capability->SysBus64V3 ? "TRUE" : "FALSE"));
   DEBUG ((DEBUG_INFO, "   Async Interrupt   %a\n", Capability->AsyncInt ? "TRUE" : "FALSE"));
   DEBUG ((DEBUG_INFO, "   SlotType          "));
   if (Capability->SlotType == 0x00) {
diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h
index dd45cbd..ad9ce64 100644
--- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h
+++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h
@@ -129,24 +129,24 @@ typedef struct {
   UINT32   Voltage33:1;       // bit 24
   UINT32   Voltage30:1;       // bit 25
   UINT32   Voltage18:1;       // bit 26
-  UINT32   Reserved3:1;       // bit 27
-  UINT32   SysBus64:1;        // bit 28
+  UINT32   SysBus64V4:1;      // bit 27
+  UINT32   SysBus64V3:1;      // bit 28
   UINT32   AsyncInt:1;        // bit 29
   UINT32   SlotType:2;        // bit 30:31
   UINT32   Sdr50:1;           // bit 32
   UINT32   Sdr104:1;          // bit 33
   UINT32   Ddr50:1;           // bit 34
-  UINT32   Reserved4:1;       // bit 35
+  UINT32   Reserved3:1;       // bit 35
   UINT32   DriverTypeA:1;     // bit 36
   UINT32   DriverTypeC:1;     // bit 37
   UINT32   DriverTypeD:1;     // bit 38
   UINT32   DriverType4:1;     // bit 39
   UINT32   TimerCount:4;      // bit 40:43
-  UINT32   Reserved5:1;       // bit 44
+  UINT32   Reserved4:1;       // bit 44
   UINT32   TuningSDR50:1;     // bit 45
   UINT32   RetuningMod:2;     // bit 46:47
   UINT32   ClkMultiplier:8;   // bit 48:55
-  UINT32   Reserved6:7;       // bit 56:62
+  UINT32   Reserved5:7;       // bit 56:62
   UINT32   Hs400:1;           // bit 63
 } SD_MMC_HC_SLOT_CAP;
 
-- 
2.7.4