OHCI1394_IT_DATA_Q0_chanNum_MASK
return (le32_to_cpu(data[0]) & OHCI1394_IT_DATA_Q0_chanNum_MASK) >> OHCI1394_IT_DATA_Q0_chanNum_SHIFT;
data[0] &= cpu_to_le32(~OHCI1394_IT_DATA_Q0_chanNum_MASK);
data[0] |= cpu_to_le32((channel << OHCI1394_IT_DATA_Q0_chanNum_SHIFT) & OHCI1394_IT_DATA_Q0_chanNum_MASK);