ISOC_HEADER_CHANNEL_MASK
return (header & ISOC_HEADER_CHANNEL_MASK) >> ISOC_HEADER_CHANNEL_SHIFT;
*header &= ~ISOC_HEADER_CHANNEL_MASK;
*header |= (((u32)channel) << ISOC_HEADER_CHANNEL_SHIFT) & ISOC_HEADER_CHANNEL_MASK;