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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * oxfw_midi.c - a part of driver for OXFW970/971 based devices4 *5 * Copyright (c) 2014 Takashi Sakamoto6 */7 8#include "oxfw.h"9 10static int midi_capture_open(struct snd_rawmidi_substream *substream)11{12 struct snd_oxfw *oxfw = substream->rmidi->private_data;13 int err;14 15 err = snd_oxfw_stream_lock_try(oxfw);16 if (err < 0)17 return err;18 19 mutex_lock(&oxfw->mutex);20 21 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 0, 0, 0, 0);22 if (err >= 0) {23 ++oxfw->substreams_count;24 err = snd_oxfw_stream_start_duplex(oxfw);25 if (err < 0)26 --oxfw->substreams_count;27 }28 29 mutex_unlock(&oxfw->mutex);30 31 if (err < 0)32 snd_oxfw_stream_lock_release(oxfw);33 34 return err;35}36 37static int midi_playback_open(struct snd_rawmidi_substream *substream)38{39 struct snd_oxfw *oxfw = substream->rmidi->private_data;40 int err;41 42 err = snd_oxfw_stream_lock_try(oxfw);43 if (err < 0)44 return err;45 46 mutex_lock(&oxfw->mutex);47 48 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 0, 0, 0, 0);49 if (err >= 0) {50 ++oxfw->substreams_count;51 err = snd_oxfw_stream_start_duplex(oxfw);52 }53 54 mutex_unlock(&oxfw->mutex);55 56 if (err < 0)57 snd_oxfw_stream_lock_release(oxfw);58 59 return err;60}61 62static int midi_capture_close(struct snd_rawmidi_substream *substream)63{64 struct snd_oxfw *oxfw = substream->rmidi->private_data;65 66 mutex_lock(&oxfw->mutex);67 68 --oxfw->substreams_count;69 snd_oxfw_stream_stop_duplex(oxfw);70 71 mutex_unlock(&oxfw->mutex);72 73 snd_oxfw_stream_lock_release(oxfw);74 return 0;75}76 77static int midi_playback_close(struct snd_rawmidi_substream *substream)78{79 struct snd_oxfw *oxfw = substream->rmidi->private_data;80 81 mutex_lock(&oxfw->mutex);82 83 --oxfw->substreams_count;84 snd_oxfw_stream_stop_duplex(oxfw);85 86 mutex_unlock(&oxfw->mutex);87 88 snd_oxfw_stream_lock_release(oxfw);89 return 0;90}91 92static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)93{94 struct snd_oxfw *oxfw = substrm->rmidi->private_data;95 unsigned long flags;96 97 spin_lock_irqsave(&oxfw->lock, flags);98 99 if (up)100 amdtp_am824_midi_trigger(&oxfw->tx_stream,101 substrm->number, substrm);102 else103 amdtp_am824_midi_trigger(&oxfw->tx_stream,104 substrm->number, NULL);105 106 spin_unlock_irqrestore(&oxfw->lock, flags);107}108 109static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)110{111 struct snd_oxfw *oxfw = substrm->rmidi->private_data;112 unsigned long flags;113 114 spin_lock_irqsave(&oxfw->lock, flags);115 116 if (up)117 amdtp_am824_midi_trigger(&oxfw->rx_stream,118 substrm->number, substrm);119 else120 amdtp_am824_midi_trigger(&oxfw->rx_stream,121 substrm->number, NULL);122 123 spin_unlock_irqrestore(&oxfw->lock, flags);124}125 126static void set_midi_substream_names(struct snd_oxfw *oxfw,127 struct snd_rawmidi_str *str)128{129 struct snd_rawmidi_substream *subs;130 131 list_for_each_entry(subs, &str->substreams, list) {132 scnprintf(subs->name, sizeof(subs->name),133 "%s MIDI %d",134 oxfw->card->shortname, subs->number + 1);135 }136}137 138int snd_oxfw_create_midi(struct snd_oxfw *oxfw)139{140 static const struct snd_rawmidi_ops capture_ops = {141 .open = midi_capture_open,142 .close = midi_capture_close,143 .trigger = midi_capture_trigger,144 };145 static const struct snd_rawmidi_ops playback_ops = {146 .open = midi_playback_open,147 .close = midi_playback_close,148 .trigger = midi_playback_trigger,149 };150 struct snd_rawmidi *rmidi;151 struct snd_rawmidi_str *str;152 int err;153 154 if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0)155 return 0;156 157 /* create midi ports */158 err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0,159 oxfw->midi_output_ports, oxfw->midi_input_ports,160 &rmidi);161 if (err < 0)162 return err;163 164 snprintf(rmidi->name, sizeof(rmidi->name),165 "%s MIDI", oxfw->card->shortname);166 rmidi->private_data = oxfw;167 168 if (oxfw->midi_input_ports > 0) {169 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;170 171 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,172 &capture_ops);173 174 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];175 176 set_midi_substream_names(oxfw, str);177 }178 179 if (oxfw->midi_output_ports > 0) {180 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;181 182 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,183 &playback_ops);184 185 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];186 187 set_midi_substream_names(oxfw, str);188 }189 190 if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0))191 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;192 193 return 0;194}195