1 // SPDX-License-Identifier: GPL-2.0-only
3 * oxfw_midi.c - a part of driver for OXFW970/971 based devices
5 * Copyright (c) 2014 Takashi Sakamoto
10 static int midi_capture_open(struct snd_rawmidi_substream *substream)
12 struct snd_oxfw *oxfw = substream->rmidi->private_data;
15 err = snd_oxfw_stream_lock_try(oxfw);
19 mutex_lock(&oxfw->mutex);
21 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 0, 0, 0, 0);
23 ++oxfw->substreams_count;
24 err = snd_oxfw_stream_start_duplex(oxfw);
26 --oxfw->substreams_count;
29 mutex_unlock(&oxfw->mutex);
32 snd_oxfw_stream_lock_release(oxfw);
37 static int midi_playback_open(struct snd_rawmidi_substream *substream)
39 struct snd_oxfw *oxfw = substream->rmidi->private_data;
42 err = snd_oxfw_stream_lock_try(oxfw);
46 mutex_lock(&oxfw->mutex);
48 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 0, 0, 0, 0);
50 ++oxfw->substreams_count;
51 err = snd_oxfw_stream_start_duplex(oxfw);
54 mutex_unlock(&oxfw->mutex);
57 snd_oxfw_stream_lock_release(oxfw);
62 static int midi_capture_close(struct snd_rawmidi_substream *substream)
64 struct snd_oxfw *oxfw = substream->rmidi->private_data;
66 mutex_lock(&oxfw->mutex);
68 --oxfw->substreams_count;
69 snd_oxfw_stream_stop_duplex(oxfw);
71 mutex_unlock(&oxfw->mutex);
73 snd_oxfw_stream_lock_release(oxfw);
77 static int midi_playback_close(struct snd_rawmidi_substream *substream)
79 struct snd_oxfw *oxfw = substream->rmidi->private_data;
81 mutex_lock(&oxfw->mutex);
83 --oxfw->substreams_count;
84 snd_oxfw_stream_stop_duplex(oxfw);
86 mutex_unlock(&oxfw->mutex);
88 snd_oxfw_stream_lock_release(oxfw);
92 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
94 struct snd_oxfw *oxfw = substrm->rmidi->private_data;
97 spin_lock_irqsave(&oxfw->lock, flags);
100 amdtp_am824_midi_trigger(&oxfw->tx_stream,
101 substrm->number, substrm);
103 amdtp_am824_midi_trigger(&oxfw->tx_stream,
104 substrm->number, NULL);
106 spin_unlock_irqrestore(&oxfw->lock, flags);
109 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
111 struct snd_oxfw *oxfw = substrm->rmidi->private_data;
114 spin_lock_irqsave(&oxfw->lock, flags);
117 amdtp_am824_midi_trigger(&oxfw->rx_stream,
118 substrm->number, substrm);
120 amdtp_am824_midi_trigger(&oxfw->rx_stream,
121 substrm->number, NULL);
123 spin_unlock_irqrestore(&oxfw->lock, flags);
126 static void set_midi_substream_names(struct snd_oxfw *oxfw,
127 struct snd_rawmidi_str *str)
129 struct snd_rawmidi_substream *subs;
131 list_for_each_entry(subs, &str->substreams, list) {
132 scnprintf(subs->name, sizeof(subs->name),
134 oxfw->card->shortname, subs->number + 1);
138 int snd_oxfw_create_midi(struct snd_oxfw *oxfw)
140 static const struct snd_rawmidi_ops capture_ops = {
141 .open = midi_capture_open,
142 .close = midi_capture_close,
143 .trigger = midi_capture_trigger,
145 static const struct snd_rawmidi_ops playback_ops = {
146 .open = midi_playback_open,
147 .close = midi_playback_close,
148 .trigger = midi_playback_trigger,
150 struct snd_rawmidi *rmidi;
151 struct snd_rawmidi_str *str;
154 if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0)
157 /* create midi ports */
158 err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0,
159 oxfw->midi_output_ports, oxfw->midi_input_ports,
164 snprintf(rmidi->name, sizeof(rmidi->name),
165 "%s MIDI", oxfw->card->shortname);
166 rmidi->private_data = oxfw;
168 if (oxfw->midi_input_ports > 0) {
169 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
171 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
174 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
176 set_midi_substream_names(oxfw, str);
179 if (oxfw->midi_output_ports > 0) {
180 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
182 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
185 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
187 set_midi_substream_names(oxfw, str);
190 if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0))
191 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;