1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * fireworks_midi.c - a part of driver for Fireworks based devices
4  *
5  * Copyright (c) 2009-2010 Clemens Ladisch
6  * Copyright (c) 2013-2014 Takashi Sakamoto
7  */
8 #include "fireworks.h"
9 
10 static int midi_open(struct snd_rawmidi_substream *substream)
11 {
12 	struct snd_efw *efw = substream->rmidi->private_data;
13 	int err;
14 
15 	err = snd_efw_stream_lock_try(efw);
16 	if (err < 0)
17 		goto end;
18 
19 	mutex_lock(&efw->mutex);
20 	err = snd_efw_stream_reserve_duplex(efw, 0, 0, 0);
21 	if (err >= 0) {
22 		++efw->substreams_counter;
23 		err = snd_efw_stream_start_duplex(efw);
24 		if (err < 0)
25 			--efw->substreams_counter;
26 	}
27 	mutex_unlock(&efw->mutex);
28 	if (err < 0)
29 		snd_efw_stream_lock_release(efw);
30 end:
31 	return err;
32 }
33 
34 static int midi_close(struct snd_rawmidi_substream *substream)
35 {
36 	struct snd_efw *efw = substream->rmidi->private_data;
37 
38 	mutex_lock(&efw->mutex);
39 	--efw->substreams_counter;
40 	snd_efw_stream_stop_duplex(efw);
41 	mutex_unlock(&efw->mutex);
42 
43 	snd_efw_stream_lock_release(efw);
44 	return 0;
45 }
46 
47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
48 {
49 	struct snd_efw *efw = substrm->rmidi->private_data;
50 	unsigned long flags;
51 
52 	spin_lock_irqsave(&efw->lock, flags);
53 
54 	if (up)
55 		amdtp_am824_midi_trigger(&efw->tx_stream,
56 					  substrm->number, substrm);
57 	else
58 		amdtp_am824_midi_trigger(&efw->tx_stream,
59 					  substrm->number, NULL);
60 
61 	spin_unlock_irqrestore(&efw->lock, flags);
62 }
63 
64 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
65 {
66 	struct snd_efw *efw = substrm->rmidi->private_data;
67 	unsigned long flags;
68 
69 	spin_lock_irqsave(&efw->lock, flags);
70 
71 	if (up)
72 		amdtp_am824_midi_trigger(&efw->rx_stream,
73 					 substrm->number, substrm);
74 	else
75 		amdtp_am824_midi_trigger(&efw->rx_stream,
76 					 substrm->number, NULL);
77 
78 	spin_unlock_irqrestore(&efw->lock, flags);
79 }
80 
81 static void set_midi_substream_names(struct snd_efw *efw,
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(subs->name, sizeof(subs->name),
88 			  "%s MIDI %d", efw->card->shortname, subs->number + 1);
89 	}
90 }
91 
92 int snd_efw_create_midi_devices(struct snd_efw *efw)
93 {
94 	static const struct snd_rawmidi_ops capture_ops = {
95 		.open		= midi_open,
96 		.close		= midi_close,
97 		.trigger	= midi_capture_trigger,
98 	};
99 	static const struct snd_rawmidi_ops playback_ops = {
100 		.open		= midi_open,
101 		.close		= midi_close,
102 		.trigger	= midi_playback_trigger,
103 	};
104 	struct snd_rawmidi *rmidi;
105 	struct snd_rawmidi_str *str;
106 	int err;
107 
108 	/* create midi ports */
109 	err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
110 			      efw->midi_out_ports, efw->midi_in_ports,
111 			      &rmidi);
112 	if (err < 0)
113 		return err;
114 
115 	snprintf(rmidi->name, sizeof(rmidi->name),
116 		 "%s MIDI", efw->card->shortname);
117 	rmidi->private_data = efw;
118 
119 	if (efw->midi_in_ports > 0) {
120 		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
121 
122 		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
123 				    &capture_ops);
124 
125 		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
126 
127 		set_midi_substream_names(efw, str);
128 	}
129 
130 	if (efw->midi_out_ports > 0) {
131 		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
132 
133 		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
134 				    &playback_ops);
135 
136 		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
137 
138 		set_midi_substream_names(efw, str);
139 	}
140 
141 	if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
142 		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
143 
144 	return 0;
145 }
146