Author: cgutman
Date: Thu Jan 26 04:35:04 2012
New Revision: 55196
URL: http://svn.reactos.org/svn/reactos?rev=55196&view=rev
Log:
[USBOHCI]
- Wait the required time for the port to be ready after powering it up
Modified:
branches/usb-bringup-trunk/drivers/usb/usbohci/hardware.cpp
Modified: branches/usb-bringup-trunk/drivers/usb/usbohci/hardware.cpp
URL:
http://svn.reactos.org/svn/reactos/branches/usb-bringup-trunk/drivers/usb/usbohci/hardware.cpp?rev=55196&r1=55195&r2=55196&view=diff
==============================================================================
--- branches/usb-bringup-trunk/drivers/usb/usbohci/hardware.cpp [iso-8859-1]
(original)
+++ branches/usb-bringup-trunk/drivers/usb/usbohci/hardware.cpp [iso-8859-1]
Thu Jan 26 04:35:04 2012
@@ -1266,10 +1266,39 @@
}
else if (Feature == PORT_POWER)
{
+ LARGE_INTEGER Timeout;
+
//
// enable power
//
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base +
OHCI_RH_PORT_STATUS(PortId)), OHCI_RH_PORTSTATUS_PPS);
+
+ //
+ // read descriptor A for the delay data
+ //
+ Value = READ_REGISTER_ULONG((PULONG)((PUCHAR)m_Base +
OHCI_RH_DESCRIPTOR_A_OFFSET));
+
+ //
+ // compute the delay
+ //
+ Timeout.QuadPart = OHCI_RH_GET_POWER_ON_TO_POWER_GOOD_TIME(Value);
+
+ //
+ // delay is multiplied by 2 ms
+ //
+ Timeout.QuadPart *= 2;
+ DPRINT1("Waiting %d milliseconds for port power up\n",
Timeout.LowPart);
+
+ //
+ // convert to 100 ns units (absolute)
+ //
+ Timeout.QuadPart *= -10000;
+
+ //
+ // perform the wait
+ //
+ KeDelayExecutionThread(KernelMode, FALSE, &Timeout);
+
return STATUS_SUCCESS;
}
else if (Feature == PORT_SUSPEND)
