1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * bebob_midi.c - a part of driver for BeBoB based devices |
4 | * |
5 | * Copyright (c) 2013-2014 Takashi Sakamoto |
6 | */ |
7 | |
8 | #include "bebob.h" |
9 | |
10 | static int midi_open(struct snd_rawmidi_substream *substream) |
11 | { |
12 | struct snd_bebob *bebob = substream->rmidi->private_data; |
13 | int err; |
14 | |
15 | err = snd_bebob_stream_lock_try(bebob); |
16 | if (err < 0) |
17 | return err; |
18 | |
19 | mutex_lock(&bebob->mutex); |
20 | err = snd_bebob_stream_reserve_duplex(bebob, rate: 0, frames_per_period: 0, frames_per_buffer: 0); |
21 | if (err >= 0) { |
22 | ++bebob->substreams_counter; |
23 | err = snd_bebob_stream_start_duplex(bebob); |
24 | if (err < 0) |
25 | --bebob->substreams_counter; |
26 | } |
27 | mutex_unlock(lock: &bebob->mutex); |
28 | if (err < 0) |
29 | snd_bebob_stream_lock_release(bebob); |
30 | |
31 | return err; |
32 | } |
33 | |
34 | static int midi_close(struct snd_rawmidi_substream *substream) |
35 | { |
36 | struct snd_bebob *bebob = substream->rmidi->private_data; |
37 | |
38 | mutex_lock(&bebob->mutex); |
39 | bebob->substreams_counter--; |
40 | snd_bebob_stream_stop_duplex(bebob); |
41 | mutex_unlock(lock: &bebob->mutex); |
42 | |
43 | snd_bebob_stream_lock_release(bebob); |
44 | return 0; |
45 | } |
46 | |
47 | static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) |
48 | { |
49 | struct snd_bebob *bebob = substrm->rmidi->private_data; |
50 | unsigned long flags; |
51 | |
52 | spin_lock_irqsave(&bebob->lock, flags); |
53 | |
54 | if (up) |
55 | amdtp_am824_midi_trigger(s: &bebob->tx_stream, |
56 | port: substrm->number, midi: substrm); |
57 | else |
58 | amdtp_am824_midi_trigger(s: &bebob->tx_stream, |
59 | port: substrm->number, NULL); |
60 | |
61 | spin_unlock_irqrestore(lock: &bebob->lock, flags); |
62 | } |
63 | |
64 | static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) |
65 | { |
66 | struct snd_bebob *bebob = substrm->rmidi->private_data; |
67 | unsigned long flags; |
68 | |
69 | spin_lock_irqsave(&bebob->lock, flags); |
70 | |
71 | if (up) |
72 | amdtp_am824_midi_trigger(s: &bebob->rx_stream, |
73 | port: substrm->number, midi: substrm); |
74 | else |
75 | amdtp_am824_midi_trigger(s: &bebob->rx_stream, |
76 | port: substrm->number, NULL); |
77 | |
78 | spin_unlock_irqrestore(lock: &bebob->lock, flags); |
79 | } |
80 | |
81 | static void set_midi_substream_names(struct snd_bebob *bebob, |
82 | struct snd_rawmidi_str *str) |
83 | { |
84 | struct snd_rawmidi_substream *subs; |
85 | |
86 | list_for_each_entry(subs, &str->substreams, list) { |
87 | scnprintf(buf: subs->name, size: sizeof(subs->name), |
88 | fmt: "%s MIDI %d" , |
89 | bebob->card->shortname, subs->number + 1); |
90 | } |
91 | } |
92 | |
93 | int snd_bebob_create_midi_devices(struct snd_bebob *bebob) |
94 | { |
95 | static const struct snd_rawmidi_ops capture_ops = { |
96 | .open = midi_open, |
97 | .close = midi_close, |
98 | .trigger = midi_capture_trigger, |
99 | }; |
100 | static const struct snd_rawmidi_ops playback_ops = { |
101 | .open = midi_open, |
102 | .close = midi_close, |
103 | .trigger = midi_playback_trigger, |
104 | }; |
105 | struct snd_rawmidi *rmidi; |
106 | struct snd_rawmidi_str *str; |
107 | int err; |
108 | |
109 | /* create midi ports */ |
110 | err = snd_rawmidi_new(card: bebob->card, id: bebob->card->driver, device: 0, |
111 | output_count: bebob->midi_output_ports, input_count: bebob->midi_input_ports, |
112 | rmidi: &rmidi); |
113 | if (err < 0) |
114 | return err; |
115 | |
116 | snprintf(buf: rmidi->name, size: sizeof(rmidi->name), |
117 | fmt: "%s MIDI" , bebob->card->shortname); |
118 | rmidi->private_data = bebob; |
119 | |
120 | if (bebob->midi_input_ports > 0) { |
121 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; |
122 | |
123 | snd_rawmidi_set_ops(rmidi, stream: SNDRV_RAWMIDI_STREAM_INPUT, |
124 | ops: &capture_ops); |
125 | |
126 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; |
127 | |
128 | set_midi_substream_names(bebob, str); |
129 | } |
130 | |
131 | if (bebob->midi_output_ports > 0) { |
132 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; |
133 | |
134 | snd_rawmidi_set_ops(rmidi, stream: SNDRV_RAWMIDI_STREAM_OUTPUT, |
135 | ops: &playback_ops); |
136 | |
137 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
138 | |
139 | set_midi_substream_names(bebob, str); |
140 | } |
141 | |
142 | if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0)) |
143 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
144 | |
145 | return 0; |
146 | } |
147 | |