1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * dice_midi.c - a part of driver for Dice based devices |
4 | * |
5 | * Copyright (c) 2014 Takashi Sakamoto |
6 | */ |
7 | #include "dice.h" |
8 | |
9 | static int midi_open(struct snd_rawmidi_substream *substream) |
10 | { |
11 | struct snd_dice *dice = substream->rmidi->private_data; |
12 | int err; |
13 | |
14 | err = snd_dice_stream_lock_try(dice); |
15 | if (err < 0) |
16 | return err; |
17 | |
18 | mutex_lock(&dice->mutex); |
19 | |
20 | err = snd_dice_stream_reserve_duplex(dice, rate: 0, events_per_period: 0, events_per_buffer: 0); |
21 | if (err >= 0) { |
22 | ++dice->substreams_counter; |
23 | err = snd_dice_stream_start_duplex(dice); |
24 | if (err < 0) |
25 | --dice->substreams_counter; |
26 | } |
27 | |
28 | mutex_unlock(lock: &dice->mutex); |
29 | |
30 | if (err < 0) |
31 | snd_dice_stream_lock_release(dice); |
32 | |
33 | return err; |
34 | } |
35 | |
36 | static int midi_close(struct snd_rawmidi_substream *substream) |
37 | { |
38 | struct snd_dice *dice = substream->rmidi->private_data; |
39 | |
40 | mutex_lock(&dice->mutex); |
41 | |
42 | --dice->substreams_counter; |
43 | snd_dice_stream_stop_duplex(dice); |
44 | |
45 | mutex_unlock(lock: &dice->mutex); |
46 | |
47 | snd_dice_stream_lock_release(dice); |
48 | return 0; |
49 | } |
50 | |
51 | static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) |
52 | { |
53 | struct snd_dice *dice = substrm->rmidi->private_data; |
54 | unsigned long flags; |
55 | |
56 | spin_lock_irqsave(&dice->lock, flags); |
57 | |
58 | if (up) |
59 | amdtp_am824_midi_trigger(s: &dice->tx_stream[0], |
60 | port: substrm->number, midi: substrm); |
61 | else |
62 | amdtp_am824_midi_trigger(s: &dice->tx_stream[0], |
63 | port: substrm->number, NULL); |
64 | |
65 | spin_unlock_irqrestore(lock: &dice->lock, flags); |
66 | } |
67 | |
68 | static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) |
69 | { |
70 | struct snd_dice *dice = substrm->rmidi->private_data; |
71 | unsigned long flags; |
72 | |
73 | spin_lock_irqsave(&dice->lock, flags); |
74 | |
75 | if (up) |
76 | amdtp_am824_midi_trigger(s: &dice->rx_stream[0], |
77 | port: substrm->number, midi: substrm); |
78 | else |
79 | amdtp_am824_midi_trigger(s: &dice->rx_stream[0], |
80 | port: substrm->number, NULL); |
81 | |
82 | spin_unlock_irqrestore(lock: &dice->lock, flags); |
83 | } |
84 | |
85 | static void set_midi_substream_names(struct snd_dice *dice, |
86 | struct snd_rawmidi_str *str) |
87 | { |
88 | struct snd_rawmidi_substream *subs; |
89 | |
90 | list_for_each_entry(subs, &str->substreams, list) { |
91 | scnprintf(buf: subs->name, size: sizeof(subs->name), |
92 | fmt: "%s MIDI %d" , dice->card->shortname, subs->number + 1); |
93 | } |
94 | } |
95 | |
96 | int snd_dice_create_midi(struct snd_dice *dice) |
97 | { |
98 | static const struct snd_rawmidi_ops capture_ops = { |
99 | .open = midi_open, |
100 | .close = midi_close, |
101 | .trigger = midi_capture_trigger, |
102 | }; |
103 | static const struct snd_rawmidi_ops playback_ops = { |
104 | .open = midi_open, |
105 | .close = midi_close, |
106 | .trigger = midi_playback_trigger, |
107 | }; |
108 | struct snd_rawmidi *rmidi; |
109 | struct snd_rawmidi_str *str; |
110 | unsigned int midi_in_ports, midi_out_ports; |
111 | int i; |
112 | int err; |
113 | |
114 | midi_in_ports = 0; |
115 | midi_out_ports = 0; |
116 | for (i = 0; i < MAX_STREAMS; ++i) { |
117 | midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]); |
118 | midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]); |
119 | } |
120 | |
121 | if (midi_in_ports + midi_out_ports == 0) |
122 | return 0; |
123 | |
124 | /* create midi ports */ |
125 | err = snd_rawmidi_new(card: dice->card, id: dice->card->driver, device: 0, |
126 | output_count: midi_out_ports, input_count: midi_in_ports, |
127 | rmidi: &rmidi); |
128 | if (err < 0) |
129 | return err; |
130 | |
131 | snprintf(buf: rmidi->name, size: sizeof(rmidi->name), |
132 | fmt: "%s MIDI" , dice->card->shortname); |
133 | rmidi->private_data = dice; |
134 | |
135 | if (midi_in_ports > 0) { |
136 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; |
137 | |
138 | snd_rawmidi_set_ops(rmidi, stream: SNDRV_RAWMIDI_STREAM_INPUT, |
139 | ops: &capture_ops); |
140 | |
141 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; |
142 | |
143 | set_midi_substream_names(dice, str); |
144 | } |
145 | |
146 | if (midi_out_ports > 0) { |
147 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; |
148 | |
149 | snd_rawmidi_set_ops(rmidi, stream: SNDRV_RAWMIDI_STREAM_OUTPUT, |
150 | ops: &playback_ops); |
151 | |
152 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
153 | |
154 | set_midi_substream_names(dice, str); |
155 | } |
156 | |
157 | if ((midi_out_ports > 0) && (midi_in_ports > 0)) |
158 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
159 | |
160 | return 0; |
161 | } |
162 | |