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a113ff88 TS |
1 | /* |
2 | * dice_midi.c - a part of driver for Dice based devices | |
3 | * | |
4 | * Copyright (c) 2014 Takashi Sakamoto | |
5 | * | |
6 | * Licensed under the terms of the GNU General Public License, version 2. | |
7 | */ | |
8 | #include "dice.h" | |
9 | ||
10 | static int midi_open(struct snd_rawmidi_substream *substream) | |
11 | { | |
12 | struct snd_dice *dice = substream->rmidi->private_data; | |
13 | int err; | |
14 | ||
15 | err = snd_dice_stream_lock_try(dice); | |
16 | if (err < 0) | |
17 | return err; | |
18 | ||
19 | mutex_lock(&dice->mutex); | |
20 | ||
21 | dice->substreams_counter++; | |
22 | err = snd_dice_stream_start_duplex(dice, 0); | |
23 | ||
24 | mutex_unlock(&dice->mutex); | |
25 | ||
26 | if (err < 0) | |
27 | snd_dice_stream_lock_release(dice); | |
28 | ||
29 | return err; | |
30 | } | |
31 | ||
32 | static int midi_close(struct snd_rawmidi_substream *substream) | |
33 | { | |
34 | struct snd_dice *dice = substream->rmidi->private_data; | |
35 | ||
36 | mutex_lock(&dice->mutex); | |
37 | ||
38 | dice->substreams_counter--; | |
39 | snd_dice_stream_stop_duplex(dice); | |
40 | ||
41 | mutex_unlock(&dice->mutex); | |
42 | ||
43 | snd_dice_stream_lock_release(dice); | |
44 | return 0; | |
45 | } | |
46 | ||
47 | static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) | |
48 | { | |
49 | struct snd_dice *dice = substrm->rmidi->private_data; | |
50 | unsigned long flags; | |
51 | ||
52 | spin_lock_irqsave(&dice->lock, flags); | |
53 | ||
54 | if (up) | |
03e2a67e | 55 | amdtp_am824_midi_trigger(&dice->tx_stream, |
a113ff88 TS |
56 | substrm->number, substrm); |
57 | else | |
03e2a67e | 58 | amdtp_am824_midi_trigger(&dice->tx_stream, |
a113ff88 TS |
59 | substrm->number, NULL); |
60 | ||
61 | spin_unlock_irqrestore(&dice->lock, flags); | |
62 | } | |
63 | ||
64 | static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) | |
65 | { | |
66 | struct snd_dice *dice = substrm->rmidi->private_data; | |
67 | unsigned long flags; | |
68 | ||
69 | spin_lock_irqsave(&dice->lock, flags); | |
70 | ||
71 | if (up) | |
03e2a67e TS |
72 | amdtp_am824_midi_trigger(&dice->rx_stream, |
73 | substrm->number, substrm); | |
a113ff88 | 74 | else |
03e2a67e TS |
75 | amdtp_am824_midi_trigger(&dice->rx_stream, |
76 | substrm->number, NULL); | |
a113ff88 TS |
77 | |
78 | spin_unlock_irqrestore(&dice->lock, flags); | |
79 | } | |
80 | ||
81 | static struct snd_rawmidi_ops capture_ops = { | |
82 | .open = midi_open, | |
83 | .close = midi_close, | |
84 | .trigger = midi_capture_trigger, | |
85 | }; | |
86 | ||
87 | static struct snd_rawmidi_ops playback_ops = { | |
88 | .open = midi_open, | |
89 | .close = midi_close, | |
90 | .trigger = midi_playback_trigger, | |
91 | }; | |
92 | ||
93 | static void set_midi_substream_names(struct snd_dice *dice, | |
94 | struct snd_rawmidi_str *str) | |
95 | { | |
96 | struct snd_rawmidi_substream *subs; | |
97 | ||
98 | list_for_each_entry(subs, &str->substreams, list) { | |
99 | snprintf(subs->name, sizeof(subs->name), | |
100 | "%s MIDI %d", dice->card->shortname, subs->number + 1); | |
101 | } | |
102 | } | |
103 | ||
104 | int snd_dice_create_midi(struct snd_dice *dice) | |
105 | { | |
106 | struct snd_rawmidi *rmidi; | |
107 | struct snd_rawmidi_str *str; | |
108 | unsigned int i, midi_in_ports, midi_out_ports; | |
109 | int err; | |
110 | ||
111 | midi_in_ports = midi_out_ports = 0; | |
112 | for (i = 0; i < 3; i++) { | |
113 | midi_in_ports = max(dice->tx_midi_ports[i], midi_in_ports); | |
114 | midi_out_ports = max(dice->rx_midi_ports[i], midi_out_ports); | |
115 | } | |
116 | ||
117 | if (midi_in_ports + midi_out_ports == 0) | |
118 | return 0; | |
119 | ||
120 | /* create midi ports */ | |
121 | err = snd_rawmidi_new(dice->card, dice->card->driver, 0, | |
122 | midi_out_ports, midi_in_ports, | |
123 | &rmidi); | |
124 | if (err < 0) | |
125 | return err; | |
126 | ||
127 | snprintf(rmidi->name, sizeof(rmidi->name), | |
128 | "%s MIDI", dice->card->shortname); | |
129 | rmidi->private_data = dice; | |
130 | ||
131 | if (midi_in_ports > 0) { | |
132 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; | |
133 | ||
134 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, | |
135 | &capture_ops); | |
136 | ||
137 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; | |
138 | ||
139 | set_midi_substream_names(dice, str); | |
140 | } | |
141 | ||
142 | if (midi_out_ports > 0) { | |
143 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; | |
144 | ||
145 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
146 | &playback_ops); | |
147 | ||
148 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; | |
149 | ||
150 | set_midi_substream_names(dice, str); | |
151 | } | |
152 | ||
153 | if ((midi_out_ports > 0) && (midi_in_ports > 0)) | |
154 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; | |
155 | ||
156 | return 0; | |
157 | } |