diff options
Diffstat (limited to 'include/standard-headers/linux/virtio_snd.h')
| -rw-r--r-- | include/standard-headers/linux/virtio_snd.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/include/standard-headers/linux/virtio_snd.h b/include/standard-headers/linux/virtio_snd.h index 1af96b9fc6..860f12e0a4 100644 --- a/include/standard-headers/linux/virtio_snd.h +++ b/include/standard-headers/linux/virtio_snd.h @@ -8,6 +8,14 @@ #include "standard-headers/linux/virtio_types.h" /******************************************************************************* + * FEATURE BITS + */ +enum { + /* device supports control elements */ + VIRTIO_SND_F_CTLS = 0 +}; + +/******************************************************************************* * CONFIGURATION SPACE */ struct virtio_snd_config { @@ -17,6 +25,8 @@ struct virtio_snd_config { uint32_t streams; /* # of available channel maps */ uint32_t chmaps; + /* # of available control elements */ + uint32_t controls; }; enum { @@ -55,6 +65,15 @@ enum { /* channel map control request types */ VIRTIO_SND_R_CHMAP_INFO = 0x0200, + /* control element request types */ + VIRTIO_SND_R_CTL_INFO = 0x0300, + VIRTIO_SND_R_CTL_ENUM_ITEMS, + VIRTIO_SND_R_CTL_READ, + VIRTIO_SND_R_CTL_WRITE, + VIRTIO_SND_R_CTL_TLV_READ, + VIRTIO_SND_R_CTL_TLV_WRITE, + VIRTIO_SND_R_CTL_TLV_COMMAND, + /* jack event types */ VIRTIO_SND_EVT_JACK_CONNECTED = 0x1000, VIRTIO_SND_EVT_JACK_DISCONNECTED, @@ -63,6 +82,9 @@ enum { VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED = 0x1100, VIRTIO_SND_EVT_PCM_XRUN, + /* control element event types */ + VIRTIO_SND_EVT_CTL_NOTIFY = 0x1200, + /* common status codes */ VIRTIO_SND_S_OK = 0x8000, VIRTIO_SND_S_BAD_MSG, @@ -331,4 +353,136 @@ struct virtio_snd_chmap_info { uint8_t positions[VIRTIO_SND_CHMAP_MAX_SIZE]; }; +/******************************************************************************* + * CONTROL ELEMENTS MESSAGES + */ +struct virtio_snd_ctl_hdr { + /* VIRTIO_SND_R_CTL_XXX */ + struct virtio_snd_hdr hdr; + /* 0 ... virtio_snd_config::controls - 1 */ + uint32_t control_id; +}; + +/* supported roles for control elements */ +enum { + VIRTIO_SND_CTL_ROLE_UNDEFINED = 0, + VIRTIO_SND_CTL_ROLE_VOLUME, + VIRTIO_SND_CTL_ROLE_MUTE, + VIRTIO_SND_CTL_ROLE_GAIN +}; + +/* supported value types for control elements */ +enum { + VIRTIO_SND_CTL_TYPE_BOOLEAN = 0, + VIRTIO_SND_CTL_TYPE_INTEGER, + VIRTIO_SND_CTL_TYPE_INTEGER64, + VIRTIO_SND_CTL_TYPE_ENUMERATED, + VIRTIO_SND_CTL_TYPE_BYTES, + VIRTIO_SND_CTL_TYPE_IEC958 +}; + +/* supported access rights for control elements */ +enum { + VIRTIO_SND_CTL_ACCESS_READ = 0, + VIRTIO_SND_CTL_ACCESS_WRITE, + VIRTIO_SND_CTL_ACCESS_VOLATILE, + VIRTIO_SND_CTL_ACCESS_INACTIVE, + VIRTIO_SND_CTL_ACCESS_TLV_READ, + VIRTIO_SND_CTL_ACCESS_TLV_WRITE, + VIRTIO_SND_CTL_ACCESS_TLV_COMMAND +}; + +struct virtio_snd_ctl_info { + /* common header */ + struct virtio_snd_info hdr; + /* element role (VIRTIO_SND_CTL_ROLE_XXX) */ + uint32_t role; + /* element value type (VIRTIO_SND_CTL_TYPE_XXX) */ + uint32_t type; + /* element access right bit map (1 << VIRTIO_SND_CTL_ACCESS_XXX) */ + uint32_t access; + /* # of members in the element value */ + uint32_t count; + /* index for an element with a non-unique name */ + uint32_t index; + /* name identifier string for the element */ + uint8_t name[44]; + /* additional information about the element's value */ + union { + /* VIRTIO_SND_CTL_TYPE_INTEGER */ + struct { + /* minimum supported value */ + uint32_t min; + /* maximum supported value */ + uint32_t max; + /* fixed step size for value (0 = variable size) */ + uint32_t step; + } integer; + /* VIRTIO_SND_CTL_TYPE_INTEGER64 */ + struct { + /* minimum supported value */ + uint64_t min; + /* maximum supported value */ + uint64_t max; + /* fixed step size for value (0 = variable size) */ + uint64_t step; + } integer64; + /* VIRTIO_SND_CTL_TYPE_ENUMERATED */ + struct { + /* # of options supported for value */ + uint32_t items; + } enumerated; + } value; +}; + +struct virtio_snd_ctl_enum_item { + /* option name */ + uint8_t item[64]; +}; + +struct virtio_snd_ctl_iec958 { + /* AES/IEC958 channel status bits */ + uint8_t status[24]; + /* AES/IEC958 subcode bits */ + uint8_t subcode[147]; + /* nothing */ + uint8_t pad; + /* AES/IEC958 subframe bits */ + uint8_t dig_subframe[4]; +}; + +struct virtio_snd_ctl_value { + union { + /* VIRTIO_SND_CTL_TYPE_BOOLEAN|INTEGER value */ + uint32_t integer[128]; + /* VIRTIO_SND_CTL_TYPE_INTEGER64 value */ + uint64_t integer64[64]; + /* VIRTIO_SND_CTL_TYPE_ENUMERATED value (option indexes) */ + uint32_t enumerated[128]; + /* VIRTIO_SND_CTL_TYPE_BYTES value */ + uint8_t bytes[512]; + /* VIRTIO_SND_CTL_TYPE_IEC958 value */ + struct virtio_snd_ctl_iec958 iec958; + } value; +}; + +/* supported event reason types */ +enum { + /* element's value has changed */ + VIRTIO_SND_CTL_EVT_MASK_VALUE = 0, + /* element's information has changed */ + VIRTIO_SND_CTL_EVT_MASK_INFO, + /* element's metadata has changed */ + VIRTIO_SND_CTL_EVT_MASK_TLV +}; + +struct virtio_snd_ctl_event { + /* VIRTIO_SND_EVT_CTL_NOTIFY */ + struct virtio_snd_hdr hdr; + /* 0 ... virtio_snd_config::controls - 1 */ + uint16_t control_id; + /* event reason bit map (1 << VIRTIO_SND_CTL_EVT_MASK_XXX) */ + uint16_t mask; +}; + #endif /* VIRTIO_SND_IF_H */ |