OHCI1394_BusOptions
bus_options = reg_read(ohci, OHCI1394_BusOptions);
reg_write(ohci, OHCI1394_BusOptions, bus_options);
reg_write(ohci, OHCI1394_BusOptions, be32_to_cpu(ohci->config_rom[2]));
reg_write(ohci, OHCI1394_BusOptions,
bus_options = reg_read(ohci, OHCI1394_BusOptions);