xref: /openbmc/linux/sound/firewire/amdtp-am824.h (revision 981ab3f1)
1 #ifndef SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED
2 #define SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED
3 
4 #include <sound/pcm.h>
5 #include <sound/rawmidi.h>
6 
7 #include "amdtp-stream.h"
8 
9 #define AM824_IN_PCM_FORMAT_BITS	SNDRV_PCM_FMTBIT_S32
10 
11 #define AM824_OUT_PCM_FORMAT_BITS	SNDRV_PCM_FMTBIT_S32
12 
13 /*
14  * This module supports maximum 64 PCM channels for one PCM stream
15  * This is for our convenience.
16  */
17 #define AM824_MAX_CHANNELS_FOR_PCM	64
18 
19 /*
20  * AMDTP packet can include channels for MIDI conformant data.
21  * Each MIDI conformant data channel includes 8 MPX-MIDI data stream.
22  * Each MPX-MIDI data stream includes one data stream from/to MIDI ports.
23  *
24  * This module supports maximum 1 MIDI conformant data channels.
25  * Then this AMDTP packets can transfer maximum 8 MIDI data streams.
26  */
27 #define AM824_MAX_CHANNELS_FOR_MIDI	1
28 
29 int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate,
30 			       unsigned int pcm_channels,
31 			       unsigned int midi_ports,
32 			       bool double_pcm_frames);
33 
34 void amdtp_am824_set_pcm_position(struct amdtp_stream *s, unsigned int index,
35 				 unsigned int position);
36 
37 void amdtp_am824_set_midi_position(struct amdtp_stream *s,
38 				   unsigned int position);
39 
40 int amdtp_am824_add_pcm_hw_constraints(struct amdtp_stream *s,
41 				       struct snd_pcm_runtime *runtime);
42 
43 void amdtp_am824_midi_trigger(struct amdtp_stream *s, unsigned int port,
44 			      struct snd_rawmidi_substream *midi);
45 
46 int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit,
47 		     enum amdtp_stream_direction dir, enum cip_flags flags);
48 #endif
49