_OSS_IOW
#define OSS_MIXER_WRITE(dev) _OSS_IOW('M', dev, int)
#define OSS_SEQ_PERCMODE _OSS_IOW ('Q', 6, int)
#define OSS_SEQ_TESTMIDI _OSS_IOW ('Q', 8, int)
#define OSS_SEQ_RESETSAMPLES _OSS_IOW ('Q', 9, int)
#define OSS_SEQ_THRESHOLD _OSS_IOW ('Q',13, int)
#define OSS_FM_4OP_ENABLE _OSS_IOW ('Q',15, int)
#define OSS_SEQ_OUTOFBAND _OSS_IOW ('Q',18, struct oss_seq_event_rec)
#define OSS_TMR_METRONOME _OSS_IOW ('T', 7, int)
#define OSS_TMR_SELECT _OSS_IOW ('T', 8, int)
#define OSS_SNDCTL_DSP_SETTRIGGER _OSS_IOW ('P', 16, int)
#define OSS_SNDCTL_DSP_PROFILE _OSS_IOW ('P', 23, int)