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authorSean Rhodes <sean@starlabs.systems>2022-12-16 16:58:06 +0800
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2022-12-21 00:46:58 +0000
commitec25e904c7da70302f2725e2005e3762f1ae891e (patch)
treec3807fcce092b16708c8a9059cb6d2e4fe32fa5a /MdeModulePkg/Bus
parent01c2fb0d2260d4de898e4e91e48770ffa5510153 (diff)
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MdeModulePkg/Bus/Pci/XhciDxe: Check port is compatible before getting PSIV
On some platforms, including Sky Lake and Kaby Lake, the PSIV (Protocol Speed ID Value) indices are shared between Protocol Speed ID DWORD' in the extended capabilities registers for both USB2 (Full Speed) and USB3 (Super Speed). An example can be found below: XhcCheckUsbPortSpeedUsedPsic: checking for USB2 ext caps XhciPsivGetPsid: found 3 PSID entries XhciPsivGetPsid: looking for port speed 1 XhciPsivGetPsid: PSIV 1 PSIE 2 PLT 0 PSIM 12 XhciPsivGetPsid: PSIV 2 PSIE 1 PLT 0 PSIM 1500 XhciPsivGetPsid: PSIV 3 PSIE 2 PLT 0 PSIM 480 XhcCheckUsbPortSpeedUsedPsic: checking for USB3 ext caps XhciPsivGetPsid: found 3 PSID entries XhciPsivGetPsid: looking for port speed 1 XhciPsivGetPsid: PSIV 1 PSIE 3 PLT 0 PSIM 5 XhciPsivGetPsid: PSIV 2 PSIE 3 PLT 0 PSIM 10 XhciPsivGetPsid: PSIV 34 PSIE 2 PLT 0 PSIM 1248 The result is edk2 detecting USB2 devices as USB3 devices, which consequently causes enumeration to fail. To avoid incorrect detection, check the Compatible Port Offset to find the starting Port of Root Hubs that support the protocol. Signed-off-by: Sean Rhodes <sean@starlabs.systems> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Diffstat (limited to 'MdeModulePkg/Bus')
-rw-r--r--MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c2
-rw-r--r--MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c35
-rw-r--r--MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h10
3 files changed, 36 insertions, 11 deletions
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
index 8dd7a8fbb7..461b2cd9b5 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
@@ -405,7 +405,7 @@ XhcGetRootHubPortStatus (
// Section 7.2 xHCI Support Protocol Capability
//
if (PortSpeed > 0) {
- PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, PortSpeed);
+ PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, PortSpeed, PortNumber);
// If no match found in ext cap reg, fall back to PORTSC
if (PortStatus->PortStatus == 0) {
//
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
index 2b4a4b2444..5700fc5fb8 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
@@ -636,6 +636,7 @@ XhcGetSupportedProtocolCapabilityAddr (
@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
+ @param PortNumber The Port Number (0-indexed)
@return The Protocol Speed ID (PSI) from xHCI Supported Protocol capability register.
@@ -644,12 +645,15 @@ UINT32
XhciPsivGetPsid (
IN USB_XHCI_INSTANCE *Xhc,
IN UINT32 ExtCapOffset,
- IN UINT8 PortSpeed
+ IN UINT8 PortSpeed,
+ IN UINT8 PortNumber
)
{
XHC_SUPPORTED_PROTOCOL_DW2 PortId;
XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID Reg;
UINT32 Count;
+ UINT32 MinPortIndex;
+ UINT32 MaxPortIndex;
if ((Xhc == NULL) || (ExtCapOffset == 0xFFFFFFFF)) {
return 0;
@@ -663,6 +667,23 @@ XhciPsivGetPsid (
//
PortId.Dword = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_DW2_OFFSET);
+ //
+ // According to XHCI 1.1 spec November 2017, valid values
+ // for CompPortOffset are 1 to CompPortCount - 1.
+ //
+ // PortNumber is zero-indexed, so subtract 1.
+ //
+ if ((PortId.Data.CompPortOffset == 0) || (PortId.Data.CompPortCount == 0)) {
+ return 0;
+ }
+
+ MinPortIndex = PortId.Data.CompPortOffset - 1;
+ MaxPortIndex = MinPortIndex + PortId.Data.CompPortCount - 1;
+
+ if ((PortNumber < MinPortIndex) || (PortNumber > MaxPortIndex)) {
+ return 0;
+ }
+
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) {
@@ -676,8 +697,9 @@ XhciPsivGetPsid (
/**
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
+ @param Xhc The XHCI Instance.
+ @param PortSpeed The Port Speed Field in USB PortSc register
+ @param PortNumber The Port Number (0-indexed)
@return The USB Port Speed.
@@ -685,7 +707,8 @@ XhciPsivGetPsid (
UINT16
XhcCheckUsbPortSpeedUsedPsic (
IN USB_XHCI_INSTANCE *Xhc,
- IN UINT8 PortSpeed
+ IN UINT8 PortSpeed,
+ IN UINT8 PortNumber
)
{
XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID SpField;
@@ -703,7 +726,7 @@ XhcCheckUsbPortSpeedUsedPsic (
// PortSpeed definition when the Major Revision is 03h.
//
if (Xhc->Usb3SupOffset != 0xFFFFFFFF) {
- SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb3SupOffset, PortSpeed);
+ SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb3SupOffset, PortSpeed, PortNumber);
if (SpField.Dword != 0) {
//
// Found the corresponding PORTSC value in PSIV field of USB3 offset.
@@ -717,7 +740,7 @@ XhcCheckUsbPortSpeedUsedPsic (
// PortSpeed definition when the Major Revision is 02h.
//
if ((UsbSpeedIdMap == 0) && (Xhc->Usb2SupOffset != 0xFFFFFFFF)) {
- SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb2SupOffset, PortSpeed);
+ SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb2SupOffset, PortSpeed, PortNumber);
if (SpField.Dword != 0) {
//
// Found the corresponding PORTSC value in PSIV field of USB2 offset.
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
index 5fe2ba4f0e..63bcae8974 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
@@ -621,10 +621,11 @@ XhcGetSupportedProtocolCapabilityAddr (
);
/**
- Find SpeedField value match with Port Speed ID value.
+ Find PortSpeed value match case in XHCI Supported Protocol Capability
- @param Xhc The XHCI Instance.
- @param Speed The Port Speed filed in USB PortSc register
+ @param Xhc The XHCI Instance.
+ @param PortSpeed The Port Speed Field in USB PortSc register
+ @param PortNumber The Port Number (0-indexed)
@return The USB Port Speed.
@@ -632,7 +633,8 @@ XhcGetSupportedProtocolCapabilityAddr (
UINT16
XhcCheckUsbPortSpeedUsedPsic (
IN USB_XHCI_INSTANCE *Xhc,
- IN UINT8 Speed
+ IN UINT8 PortSpeed,
+ IN UINT8 PortNumber
);
#endif