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[USBOHCI]

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- Properly dismiss the enable status changed interrupt to avoid an interrupt storm after a device is disconnected

svn path=/branches/usb-bringup-trunk/; revision=55189
This commit is contained in:
Cameron Gutman 2012-01-26 01:46:06 +00:00
parent 334c9ed261
commit c60ff01cc6
1 changed files with 10 additions and 18 deletions
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28
drivers/usb/usbohci/hardware.cpp
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@ -1125,9 +1125,9 @@ CUSBHardwareDevice::GetPortStatus(
if (Value & OHCI_RH_PORTSTATUS_PES)
*PortStatus |= USB_PORT_STATUS_ENABLE;
// port enabled
// port disconnect or hardware error
if (Value & OHCI_RH_PORTSTATUS_PESC)
*PortChange |= USB_PORT_STATUS_ENABLE;
*PortChange |= USB_PORT_STATUS_CONNECT;
// port suspend
if (Value & OHCI_RH_PORTSTATUS_PSS)
@ -1211,7 +1211,6 @@ CUSBHardwareDevice::ClearPortStatus(
//
// sanity checks
//
ASSERT((Value & OHCI_RH_PORTSTATUS_PRS) == 0);
ASSERT((Value & OHCI_RH_PORTSTATUS_PRSC));
//
@ -1219,28 +1218,25 @@ CUSBHardwareDevice::ClearPortStatus(
//
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_RH_PORT_STATUS(PortId)), OHCI_RH_PORTSTATUS_PRSC);
//
// sanity check
//
ASSERT((Value & OHCI_RH_PORTSTATUS_PES));
//
// re-enable root hub change
//
Value = READ_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_INTERRUPT_ENABLE_OFFSET));
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_INTERRUPT_ENABLE_OFFSET), Value | OHCI_ROOT_HUB_STATUS_CHANGE);
}
if (Status == C_PORT_CONNECTION)
if (Status == C_PORT_CONNECTION || Status == C_PORT_ENABLE)
{
//
// clear bit
// clear bits
//
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_RH_PORT_STATUS(PortId)), OHCI_RH_PORTSTATUS_CSC);
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_RH_PORT_STATUS(PortId)), OHCI_RH_PORTSTATUS_CSC | OHCI_RH_PORTSTATUS_PESC);
}
//
// re-enable root hub change
//
WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_INTERRUPT_ENABLE_OFFSET), OHCI_ROOT_HUB_STATUS_CHANGE);
return STATUS_SUCCESS;
}
@ -1474,10 +1470,6 @@ InterruptServiceRoutine(
if (Status & OHCI_ROOT_HUB_STATUS_CHANGE)
{
//
// new device has arrived
//
//
// disable interrupt as it will fire untill the port has been reset
//