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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/sound/pci/emu10k1/emu10k1_synth.c
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/*

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 *  Copyright (C) 2000 Takashi Iwai <[email protected]>

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 *

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 *  Routines for control of EMU10K1 WaveTable synth

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 *

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 *   This program is free software; you can redistribute it and/or modify

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 *   it under the terms of the GNU General Public License as published by

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 *   the Free Software Foundation; either version 2 of the License, or

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 *   (at your option) any later version.

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 *

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 *   This program is distributed in the hope that it will be useful,

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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *   GNU General Public License for more details.

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 *

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 *   You should have received a copy of the GNU General Public License

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 *   along with this program; if not, write to the Free Software

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 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

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 */

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#include "emu10k1_synth_local.h"

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#include <linux/init.h>

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MODULE_AUTHOR("Takashi Iwai");

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MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");

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MODULE_LICENSE("GPL");

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/*

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 * create a new hardware dependent device for Emu10k1

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 */

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static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)

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{

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	struct snd_emux *emux;

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	struct snd_emu10k1 *hw;

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	struct snd_emu10k1_synth_arg *arg;

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	unsigned long flags;

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	arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);

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	if (arg == NULL)

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		return -EINVAL;

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	if (arg->seq_ports <= 0)

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		return 0; /* nothing */

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	if (arg->max_voices < 1)

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		arg->max_voices = 1;

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	else if (arg->max_voices > 64)

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		arg->max_voices = 64;

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	if (snd_emux_new(&emux) < 0)

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		return -ENOMEM;

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	snd_emu10k1_ops_setup(emux);

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	hw = arg->hwptr;

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	emux->hw = hw;

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	emux->max_voices = arg->max_voices;

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	emux->num_ports = arg->seq_ports;

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	emux->pitch_shift = -501;

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	emux->memhdr = hw->memhdr;

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	/* maximum two ports */

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	emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;

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	/* audigy has two external midis */

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	emux->midi_devidx = hw->audigy ? 2 : 1;

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	emux->linear_panning = 0;

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	emux->hwdep_idx = 2; /* FIXED */

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	if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {

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		snd_emux_free(emux);

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		return -ENOMEM;

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	}

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	spin_lock_irqsave(&hw->voice_lock, flags);

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	hw->synth = emux;

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	hw->get_synth_voice = snd_emu10k1_synth_get_voice;

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	spin_unlock_irqrestore(&hw->voice_lock, flags);

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	dev->driver_data = emux;

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	return 0;

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}

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static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)

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{

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	struct snd_emux *emux;

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	struct snd_emu10k1 *hw;

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	unsigned long flags;

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	if (dev->driver_data == NULL)

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		return 0; /* not registered actually */

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	emux = dev->driver_data;

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	hw = emux->hw;

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	spin_lock_irqsave(&hw->voice_lock, flags);

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	hw->synth = NULL;

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	hw->get_synth_voice = NULL;

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	spin_unlock_irqrestore(&hw->voice_lock, flags);

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	snd_emux_free(emux);

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	return 0;

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}

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/*

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 *  INIT part

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 */

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static int __init alsa_emu10k1_synth_init(void)

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{

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	static struct snd_seq_dev_ops ops = {

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		snd_emu10k1_synth_new_device,

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		snd_emu10k1_synth_delete_device,

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	};

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	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,

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					      sizeof(struct snd_emu10k1_synth_arg));

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}

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static void __exit alsa_emu10k1_synth_exit(void)

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{

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	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);

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}

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module_init(alsa_emu10k1_synth_init)

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module_exit(alsa_emu10k1_synth_exit)

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