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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/firewire/amdtp-am824.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED

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#define SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED

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#include <sound/pcm.h>

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#include <sound/rawmidi.h>

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#include "amdtp-stream.h"

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#define AM824_IN_PCM_FORMAT_BITS	SNDRV_PCM_FMTBIT_S32

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#define AM824_OUT_PCM_FORMAT_BITS	SNDRV_PCM_FMTBIT_S32

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/*

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 * This module supports maximum 64 PCM channels for one PCM stream

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 * This is for our convenience.

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 */

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#define AM824_MAX_CHANNELS_FOR_PCM	64

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/*

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 * AMDTP packet can include channels for MIDI conformant data.

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 * Each MIDI conformant data channel includes 8 MPX-MIDI data stream.

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 * Each MPX-MIDI data stream includes one data stream from/to MIDI ports.

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 *

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 * This module supports maximum 1 MIDI conformant data channels.

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 * Then this AMDTP packets can transfer maximum 8 MIDI data streams.

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 */

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#define AM824_MAX_CHANNELS_FOR_MIDI	1

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int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate,

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			       unsigned int pcm_channels,

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			       unsigned int midi_ports,

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			       bool double_pcm_frames);

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void amdtp_am824_set_pcm_position(struct amdtp_stream *s, unsigned int index,

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				 unsigned int position);

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void amdtp_am824_set_midi_position(struct amdtp_stream *s,

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				   unsigned int position);

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int amdtp_am824_add_pcm_hw_constraints(struct amdtp_stream *s,

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				       struct snd_pcm_runtime *runtime);

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void amdtp_am824_midi_trigger(struct amdtp_stream *s, unsigned int port,

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			      struct snd_rawmidi_substream *midi);

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int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit,

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		     enum amdtp_stream_direction dir, unsigned int flags);

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#endif

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