diff options
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 3ba01664f82..72ccd56e36d 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -152,6 +152,20 @@ static int ehci_pci_setup(struct usb_hcd *hcd) break; } break; + case PCI_VENDOR_ID_VIA: + if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) { + u8 tmp; + + /* The VT6212 defaults to a 1 usec EHCI sleep time which + * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes + * that sleep time use the conventional 10 usec. + */ + pci_read_config_byte(pdev, 0x4b, &tmp); + if (tmp & 0x20) + break; + pci_write_config_byte(pdev, 0x4b, tmp | 0x20); + } + break; } ehci_reset(ehci); |