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161 lines
3.7 KiB
161 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* dice_midi.c - a part of driver for Dice based devices |
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* |
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* Copyright (c) 2014 Takashi Sakamoto |
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*/ |
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#include "dice.h" |
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static int midi_open(struct snd_rawmidi_substream *substream) |
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{ |
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struct snd_dice *dice = substream->rmidi->private_data; |
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int err; |
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err = snd_dice_stream_lock_try(dice); |
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if (err < 0) |
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return err; |
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mutex_lock(&dice->mutex); |
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err = snd_dice_stream_reserve_duplex(dice, 0, 0, 0); |
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if (err >= 0) { |
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++dice->substreams_counter; |
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err = snd_dice_stream_start_duplex(dice); |
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if (err < 0) |
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--dice->substreams_counter; |
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} |
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mutex_unlock(&dice->mutex); |
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if (err < 0) |
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snd_dice_stream_lock_release(dice); |
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return err; |
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} |
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static int midi_close(struct snd_rawmidi_substream *substream) |
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{ |
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struct snd_dice *dice = substream->rmidi->private_data; |
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mutex_lock(&dice->mutex); |
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--dice->substreams_counter; |
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snd_dice_stream_stop_duplex(dice); |
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mutex_unlock(&dice->mutex); |
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snd_dice_stream_lock_release(dice); |
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return 0; |
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} |
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static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) |
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{ |
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struct snd_dice *dice = substrm->rmidi->private_data; |
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unsigned long flags; |
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spin_lock_irqsave(&dice->lock, flags); |
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if (up) |
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amdtp_am824_midi_trigger(&dice->tx_stream[0], |
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substrm->number, substrm); |
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else |
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amdtp_am824_midi_trigger(&dice->tx_stream[0], |
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substrm->number, NULL); |
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spin_unlock_irqrestore(&dice->lock, flags); |
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} |
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static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) |
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{ |
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struct snd_dice *dice = substrm->rmidi->private_data; |
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unsigned long flags; |
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spin_lock_irqsave(&dice->lock, flags); |
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if (up) |
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amdtp_am824_midi_trigger(&dice->rx_stream[0], |
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substrm->number, substrm); |
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else |
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amdtp_am824_midi_trigger(&dice->rx_stream[0], |
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substrm->number, NULL); |
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spin_unlock_irqrestore(&dice->lock, flags); |
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} |
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static void set_midi_substream_names(struct snd_dice *dice, |
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struct snd_rawmidi_str *str) |
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{ |
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struct snd_rawmidi_substream *subs; |
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list_for_each_entry(subs, &str->substreams, list) { |
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snprintf(subs->name, sizeof(subs->name), |
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"%s MIDI %d", dice->card->shortname, subs->number + 1); |
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} |
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} |
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int snd_dice_create_midi(struct snd_dice *dice) |
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{ |
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static const struct snd_rawmidi_ops capture_ops = { |
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.open = midi_open, |
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.close = midi_close, |
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.trigger = midi_capture_trigger, |
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}; |
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static const struct snd_rawmidi_ops playback_ops = { |
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.open = midi_open, |
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.close = midi_close, |
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.trigger = midi_playback_trigger, |
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}; |
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struct snd_rawmidi *rmidi; |
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struct snd_rawmidi_str *str; |
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unsigned int midi_in_ports, midi_out_ports; |
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int i; |
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int err; |
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midi_in_ports = 0; |
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midi_out_ports = 0; |
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for (i = 0; i < MAX_STREAMS; ++i) { |
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midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]); |
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midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]); |
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} |
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if (midi_in_ports + midi_out_ports == 0) |
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return 0; |
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/* create midi ports */ |
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err = snd_rawmidi_new(dice->card, dice->card->driver, 0, |
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midi_out_ports, midi_in_ports, |
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&rmidi); |
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if (err < 0) |
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return err; |
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snprintf(rmidi->name, sizeof(rmidi->name), |
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"%s MIDI", dice->card->shortname); |
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rmidi->private_data = dice; |
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if (midi_in_ports > 0) { |
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; |
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
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&capture_ops); |
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; |
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set_midi_substream_names(dice, str); |
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} |
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if (midi_out_ports > 0) { |
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; |
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, |
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&playback_ops); |
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
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set_midi_substream_names(dice, str); |
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} |
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if ((midi_out_ports > 0) && (midi_in_ports > 0)) |
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
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return 0; |
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}
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