PCI_TPH_CAP
pci_read_config_dword(pdev, pdev->tph_cap + PCI_TPH_CAP, ®);
pci_read_config_dword(pdev, pdev->tph_cap + PCI_TPH_CAP, ®);
pci_read_config_dword(pdev, pdev->tph_cap + PCI_TPH_CAP, ®);
pci_read_config_dword(pdev, pdev->tph_cap + PCI_TPH_CAP, ®);
ret = pci_read_config_dword(pdev, epos + PCI_TPH_CAP, &dword);