USB: fix SB600 USB subsystem hang bug

[linux-2.6-omap-h63xx.git] / drivers / usb / host / ehci-pci.c

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 9d0ea573aef60c3e45afb3dec145c5f0f4ed843b..36864f9584445a41cf8bea70155c50b76f888cc2 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -169,18 +169,21 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                }
                break;
        case PCI_VENDOR_ID_ATI:
-               /* SB700 old version has a bug in EHCI controller,
+               /* SB600 and old version of SB700 have a bug in EHCI controller,
                 * which causes usb devices lose response in some cases.
                 */
-               if (pdev->device == 0x4396) {
+               if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
                        p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
                                                 PCI_DEVICE_ID_ATI_SBX00_SMBUS,
                                                 NULL);
                        if (!p_smbus)
                                break;
                        rev = p_smbus->revision;
-                       if ((rev == 0x3a) || (rev == 0x3b)) {
+                       if ((pdev->device == 0x4386) || (rev == 0x3a)
+                           || (rev == 0x3b)) {
                                u8 tmp;
+                               ehci_info(ehci, "applying AMD SB600/SB700 USB "
+                                       "freeze workaround\n");
                                pci_read_config_byte(pdev, 0x53, &tmp);
                                pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
                        }