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MdeModulePkg XhciDxe: Assign Usb2Hc.XXXRevision based on SBRN

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Current hard code Usb2Hc.XXXRevision may be not accurate.
This patch updates code to assign Usb2Hc.XXXRevision based on
SBRN (Serial Bus Release Number, PCI configuration space offset
0x60) although there is no code consuming them.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
This commit is contained in:
Star Zeng
2018-10-21 12:12:39 +08:00
parent a6a326770b
commit fed6cf25b8
2 changed files with 16 additions and 0 deletions
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14
MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
View File

@@ -1770,6 +1770,7 @@ XhcCreateUsbHc (
EFI_STATUS Status;
UINT32 PageSize;
UINT16 ExtCapReg;
UINT8 ReleaseNumber;
Xhc = AllocateZeroPool (sizeof (USB_XHCI_INSTANCE));
@@ -1786,6 +1787,19 @@ XhcCreateUsbHc (
Xhc->OriginalPciAttributes = OriginalPciAttributes;
CopyMem (&Xhc->Usb2Hc, &gXhciUsb2HcTemplate, sizeof (EFI_USB2_HC_PROTOCOL));
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
XHC_PCI_SBRN_OFFSET,
1,
&ReleaseNumber
);
if (!EFI_ERROR (Status)) {
Xhc->Usb2Hc.MajorRevision = (ReleaseNumber & 0xF0) >> 4;
Xhc->Usb2Hc.MinorRevision = (ReleaseNumber & 0x0F);
}
InitializeListHead (&Xhc->AsyncIntTransfers);
//