AGP_I810_MISCC
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
pci_read_config(sc->bdev, AGP_I810_MISCC, 2));