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 snprintf(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