svn commit: r268884 - stable/10/sys/dev/usb/controller

[Hans Petter Selasky]

Author: hselasky
Date: Sat Jul 19 19:56:23 2014
New Revision: 268884
URL: http://svnweb.freebsd.org/changeset/base/268884

Log:
  MFC r268735:
  Improve support for Intel Lynx Point USB 3.0 controllers by using the
  USB 2.0 port mask in addition to the USB 3.0 port mask. The hardware
  does not always accept when writing -1U to the port switching
  registers.

Modified:
  stable/10/sys/dev/usb/controller/xhci_pci.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/dev/usb/controller/xhci_pci.c
==============================================================================
--- stable/10/sys/dev/usb/controller/xhci_pci.c	Sat Jul 19 18:38:48 2014	(r268883)
+++ stable/10/sys/dev/usb/controller/xhci_pci.c	Sat Jul 19 19:56:23 2014	(r268884)
@@ -150,6 +150,8 @@ static int
 xhci_pci_port_route(device_t self, uint32_t set, uint32_t clear)
 {
 	uint32_t temp;
+	uint32_t usb3_mask;
+	uint32_t usb2_mask;
 
 	temp = pci_read_config(self, PCI_XHCI_INTEL_USB3_PSSEN, 4) |
 	    pci_read_config(self, PCI_XHCI_INTEL_XUSB2PR, 4);
@@ -158,10 +160,11 @@ xhci_pci_port_route(device_t self, uint3
 	temp &= ~clear;
 
 	/* Don't set bits which the hardware doesn't support */
-	temp &= pci_read_config(self, PCI_XHCI_INTEL_USB3PRM, 4);
+	usb3_mask = pci_read_config(self, PCI_XHCI_INTEL_USB3PRM, 4);
+	usb2_mask = pci_read_config(self, PCI_XHCI_INTEL_USB2PRM, 4);
 
-	pci_write_config(self, PCI_XHCI_INTEL_USB3_PSSEN, temp, 4);
-	pci_write_config(self, PCI_XHCI_INTEL_XUSB2PR, temp, 4);
+	pci_write_config(self, PCI_XHCI_INTEL_USB3_PSSEN, temp & usb3_mask, 4);
+	pci_write_config(self, PCI_XHCI_INTEL_XUSB2PR, temp & usb2_mask, 4);
 
 	device_printf(self, "Port routing mask set to 0x%08x\n", temp);