TIMECSR
reg = rt2x00mmio_register_read(rt2x00dev, TIMECSR);
rt2x00mmio_register_write(rt2x00dev, TIMECSR, reg);
reg = rt2x00mmio_register_read(rt2x00dev, TIMECSR);
rt2x00mmio_register_write(rt2x00dev, TIMECSR, reg);