_OSS_IOR
#define OSS_MIXER_READ(dev) _OSS_IOR('M', dev, int)
#define OSS_SOUND_MIXER_INFO _OSS_IOR('M', 101, struct oss_mixer_info)
#define OSS_SOUND_OLD_MIXER_INFO _OSS_IOR('M', 101, struct oss_old_mixer_info)
#define OSS_GET_VERSION _OSS_IOR('M', 118, int)
#define OSS_SEQ_GETOUTCOUNT _OSS_IOR ('Q', 4, int)
#define OSS_SEQ_GETINCOUNT _OSS_IOR ('Q', 5, int)
#define OSS_SEQ_NRSYNTHS _OSS_IOR ('Q',10, int)
#define OSS_SEQ_NRMIDIS _OSS_IOR ('Q',11, int)
#define OSS_SEQ_GETTIME _OSS_IOR ('Q',19, int)
#define OSS_SOUND_PCM_READ_RATE _OSS_IOR ('P', 2, int)
#define OSS_SOUND_PCM_READ_BITS _OSS_IOR ('P', 5, int)
#define OSS_SOUND_PCM_READ_CHANNELS _OSS_IOR ('P', 6, int)
#define OSS_SOUND_PCM_READ_FILTER _OSS_IOR ('P', 7, int)
#define OSS_SNDCTL_DSP_GETFMTS _OSS_IOR ('P', 11, int)
#define OSS_SNDCTL_DSP_GETOSPACE _OSS_IOR ('P',12, struct oss_audio_buf_info)
#define OSS_SNDCTL_DSP_GETISPACE _OSS_IOR ('P',13, struct oss_audio_buf_info)
#define OSS_SNDCTL_DSP_GETCAPS _OSS_IOR ('P',15, int)
#define OSS_SNDCTL_DSP_GETTRIGGER _OSS_IOR ('P', 16, int)
#define OSS_SNDCTL_DSP_GETIPTR _OSS_IOR ('P', 17, struct oss_count_info)
#define OSS_SNDCTL_DSP_GETOPTR _OSS_IOR ('P', 18, struct oss_count_info)
#define OSS_SNDCTL_DSP_MAPINBUF _OSS_IOR ('P', 19, struct oss_buffmem_desc)
#define OSS_SNDCTL_DSP_MAPOUTBUF _OSS_IOR ('P', 20, struct oss_buffmem_desc)
#define OSS_SNDCTL_DSP_GETODELAY _OSS_IOR ('P', 23, int)