USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer

[safe/jmp/linux-2.6] / drivers / usb / host / ohci-pci.c

diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index a9c2ae3..b8a1148 100644 (file)
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -177,6 +177,13 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
                return 0;
 
        pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
+
+       /* SB800 needs pre-fetch fix */
+       if ((rev >= 0x40) && (rev <= 0x4f)) {
+               ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
+               ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
+       }
+
        if ((rev > 0x3b) || (rev < 0x30)) {
                pci_dev_put(amd_smbus_dev);
                amd_smbus_dev = NULL;
@@ -262,6 +269,19 @@ static void amd_iso_dev_put(void)
 
 }
 
+static void sb800_prefetch(struct ohci_hcd *ohci, int on)
+{
+       struct pci_dev *pdev;
+       u16 misc;
+
+       pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
+       pci_read_config_word(pdev, 0x50, &misc);
+       if (on == 0)
+               pci_write_config_word(pdev, 0x50, misc & 0xfcff);
+       else
+               pci_write_config_word(pdev, 0x50, misc | 0x0300);
+}
+
 /* List of quirks for OHCI */
 static const struct pci_device_id ohci_pci_quirks[] = {
        {
@@ -355,9 +375,9 @@ static int __devinit ohci_pci_start (struct usb_hcd *hcd)
 
                /* RWC may not be set for add-in PCI cards, since boot
                 * firmware probably ignored them.  This transfers PCI
-                * PM wakeup capabilities (once the PCI layer is fixed).
+                * PM wakeup capabilities.
                 */
-               if (device_may_wakeup(&pdev->dev))
+               if (device_can_wakeup(&pdev->dev))
                        ohci->hc_control |= OHCI_CTRL_RWC;
        }
 #endif /* CONFIG_PM */
@@ -372,7 +392,7 @@ static int __devinit ohci_pci_start (struct usb_hcd *hcd)
 
 #ifdef CONFIG_PM
 
-static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
+static int ohci_pci_suspend(struct usb_hcd *hcd)
 {
        struct ohci_hcd *ohci = hcd_to_ohci (hcd);
        unsigned long   flags;
@@ -394,10 +414,6 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
        ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
        (void)ohci_readl(ohci, &ohci->regs->intrdisable);
 
-       /* make sure snapshot being resumed re-enumerates everything */
-       if (message.event == PM_EVENT_PRETHAW)
-               ohci_usb_reset(ohci);
-
        clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
  bail:
        spin_unlock_irqrestore (&ohci->lock, flags);
@@ -406,9 +422,14 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 }
 
 
-static int ohci_pci_resume (struct usb_hcd *hcd)
+static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 {
        set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+       /* Make sure resume from hibernation re-enumerates everything */
+       if (hibernated)
+               ohci_usb_reset(hcd_to_ohci(hcd));
+
        ohci_finish_controller_resume(hcd);
        return 0;
 }
@@ -484,12 +505,11 @@ static struct pci_driver ohci_pci_driver = {
 
        .probe =        usb_hcd_pci_probe,
        .remove =       usb_hcd_pci_remove,
+       .shutdown =     usb_hcd_pci_shutdown,
 
-#ifdef CONFIG_PM
-       .suspend =      usb_hcd_pci_suspend,
-       .resume =       usb_hcd_pci_resume,
+#ifdef CONFIG_PM_SLEEP
+       .driver =       {
+               .pm =   &usb_hcd_pci_pm_ops
+       },
 #endif
-
-       .shutdown =     usb_hcd_pci_shutdown,
 };
-