diff options
| -rw-r--r-- | MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.c b/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.c index 6c179b0935..cefdf09915 100644 --- a/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.c +++ b/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.c @@ -2,7 +2,7 @@ PEIM to produce gPeiUsb2HostControllerPpiGuid based on gPeiUsbControllerPpiGuid
which is used to enable recovery function from USB Drivers.
-Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -401,6 +401,26 @@ EhcRunHC ( }
/**
+ Power On All EHCI Ports.
+
+ @param Ehc The EHCI device.
+
+**/
+VOID
+EhcPowerOnAllPorts (
+ IN PEI_USB2_HC_DEV *Ehc
+ )
+{
+ UINT8 PortNumber;
+ UINT8 Index;
+
+ PortNumber = (UINT8)(Ehc->HcStructParams & HCSP_NPORTS);
+ for (Index = 0; Index < PortNumber; Index++) {
+ EhcSetOpRegBit (Ehc, EHC_PORT_STAT_OFFSET + 4 * Index, PORTSC_POWER);
+ }
+}
+
+/**
Initialize the HC hardware.
EHCI spec lists the five things to do to initialize the hardware.
1. Program CTRLDSSEGMENT.
@@ -443,6 +463,9 @@ EhcInitHC ( if (Ehc->Urb == NULL) {
return Status;
}
+
+ EhcPowerOnAllPorts (Ehc);
+ MicroSecondDelay (EHC_ROOT_PORT_RECOVERY_STALL);
Status = EhcInitSched (Ehc);
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