diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c index 80be3311d4..2b4a4b2444 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c @@ -576,6 +576,184 @@ XhcGetCapabilityAddr ( }
/**
+ Calculate the offset of the xHCI Supported Protocol Capability.
+
+ @param Xhc The XHCI Instance.
+ @param MajorVersion The USB Major Version in xHCI Support Protocol Capability Field
+
+ @return The offset of xHCI Supported Protocol capability register.
+
+**/
+UINT32
+XhcGetSupportedProtocolCapabilityAddr (
+ IN USB_XHCI_INSTANCE *Xhc,
+ IN UINT8 MajorVersion
+ )
+{
+ UINT32 ExtCapOffset;
+ UINT8 NextExtCapReg;
+ UINT32 Data;
+ UINT32 NameString;
+ XHC_SUPPORTED_PROTOCOL_DW0 UsbSupportDw0;
+
+ if (Xhc == NULL) {
+ return 0;
+ }
+
+ ExtCapOffset = 0;
+
+ do {
+ //
+ // Check if the extended capability register's capability id is USB Legacy Support.
+ //
+ Data = XhcReadExtCapReg (Xhc, ExtCapOffset);
+ UsbSupportDw0.Dword = Data;
+ if ((Data & 0xFF) == XHC_CAP_USB_SUPPORTED_PROTOCOL) {
+ if (UsbSupportDw0.Data.RevMajor == MajorVersion) {
+ NameString = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_NAME_STRING_OFFSET);
+ if (NameString == XHC_SUPPORTED_PROTOCOL_NAME_STRING_VALUE) {
+ //
+ // Ensure Name String field is xHCI supported protocols in xHCI Supported Protocol Capability Offset 04h
+ //
+ return ExtCapOffset;
+ }
+ }
+ }
+
+ //
+ // If not, then traverse all of the ext capability registers till finding out it.
+ //
+ NextExtCapReg = (UINT8)((Data >> 8) & 0xFF);
+ ExtCapOffset += (NextExtCapReg << 2);
+ } while (NextExtCapReg != 0);
+
+ return 0xFFFFFFFF;
+}
+
+/**
+ Find PortSpeed value match Protocol Speed ID Value (PSIV).
+
+ @param Xhc The XHCI Instance.
+ @param ExtCapOffset The USB Major Version in xHCI Support Protocol Capability Field
+ @param PortSpeed The Port Speed Field in USB PortSc register
+
+ @return The Protocol Speed ID (PSI) from xHCI Supported Protocol capability register.
+
+**/
+UINT32
+XhciPsivGetPsid (
+ IN USB_XHCI_INSTANCE *Xhc,
+ IN UINT32 ExtCapOffset,
+ IN UINT8 PortSpeed
+ )
+{
+ XHC_SUPPORTED_PROTOCOL_DW2 PortId;
+ XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID Reg;
+ UINT32 Count;
+
+ if ((Xhc == NULL) || (ExtCapOffset == 0xFFFFFFFF)) {
+ return 0;
+ }
+
+ //
+ // According to XHCI 1.1 spec November 2017,
+ // Section 7.2 xHCI Supported Protocol Capability
+ // 1. Get the PSIC(Protocol Speed ID Count) value.
+ // 2. The PSID register boundary should be Base address + PSIC * 0x04
+ //
+ PortId.Dword = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_DW2_OFFSET);
+
+ for (Count = 0; Count < PortId.Data.Psic; Count++) {
+ Reg.Dword = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_PSI_OFFSET + (Count << 2));
+ if (Reg.Data.Psiv == PortSpeed) {
+ return Reg.Dword;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ Find PortSpeed value match case in XHCI Supported Protocol Capability
+
+ @param Xhc The XHCI Instance.
+ @param PortSpeed The Port Speed Field in USB PortSc register
+
+ @return The USB Port Speed.
+
+**/
+UINT16
+XhcCheckUsbPortSpeedUsedPsic (
+ IN USB_XHCI_INSTANCE *Xhc,
+ IN UINT8 PortSpeed
+ )
+{
+ XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID SpField;
+ UINT16 UsbSpeedIdMap;
+
+ if (Xhc == NULL) {
+ return 0;
+ }
+
+ SpField.Dword = 0;
+ UsbSpeedIdMap = 0;
+
+ //
+ // Check xHCI Supported Protocol Capability, find the PSIV field to match
+ // PortSpeed definition when the Major Revision is 03h.
+ //
+ if (Xhc->Usb3SupOffset != 0xFFFFFFFF) {
+ SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb3SupOffset, PortSpeed);
+ if (SpField.Dword != 0) {
+ //
+ // Found the corresponding PORTSC value in PSIV field of USB3 offset.
+ //
+ UsbSpeedIdMap = USB_PORT_STAT_SUPER_SPEED;
+ }
+ }
+
+ //
+ // Check xHCI Supported Protocol Capability, find the PSIV field to match
+ // PortSpeed definition when the Major Revision is 02h.
+ //
+ if ((UsbSpeedIdMap == 0) && (Xhc->Usb2SupOffset != 0xFFFFFFFF)) {
+ SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb2SupOffset, PortSpeed);
+ if (SpField.Dword != 0) {
+ //
+ // Found the corresponding PORTSC value in PSIV field of USB2 offset.
+ //
+ if (SpField.Data.Psie == 2) {
+ //
+ // According to XHCI 1.1 spec November 2017,
+ // Section 7.2.1 the Protocol Speed ID Exponent (PSIE) field definition,
+ // PSIE value shall be applied to Protocol Speed ID Mantissa when calculating, value 2 shall represent bit rate in Mb/s
+ //
+ if (SpField.Data.Psim == XHC_SUPPORTED_PROTOCOL_USB2_HIGH_SPEED_PSIM) {
+ //
+ // PSIM shows as default High-speed protocol, apply to High-speed mapping
+ //
+ UsbSpeedIdMap = USB_PORT_STAT_HIGH_SPEED;
+ }
+ } else if (SpField.Data.Psie == 1) {
+ //
+ // According to XHCI 1.1 spec November 2017,
+ // Section 7.2.1 the Protocol Speed ID Exponent (PSIE) field definition,
+ // PSIE value shall be applied to Protocol Speed ID Mantissa when calculating, value 1 shall represent bit rate in Kb/s
+ //
+ if (SpField.Data.Psim == XHC_SUPPORTED_PROTOCOL_USB2_LOW_SPEED_PSIM) {
+ //
+ // PSIM shows as default Low-speed protocol, apply to Low-speed mapping
+ //
+ UsbSpeedIdMap = USB_PORT_STAT_LOW_SPEED;
+ }
+ }
+ }
+ }
+
+ return UsbSpeedIdMap;
+}
+
+/**
Whether the XHCI host controller is halted.
@param Xhc The XHCI Instance.
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