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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/pci/emu10k1/emu10k1_synth.c
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// SPDX-License-Identifier: GPL-2.0-or-later

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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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#include "emu10k1_synth_local.h"

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#include <linux/init.h>

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#include <linux/module.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_probe(struct device *_dev)

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{

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	struct snd_seq_device *dev = to_seq_dev(_dev);

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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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	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->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_irq(&hw->voice_lock);

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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_irq(&hw->voice_lock);

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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_remove(struct device *_dev)

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{

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	struct snd_seq_device *dev = to_seq_dev(_dev);

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	struct snd_emux *emux;

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	struct snd_emu10k1 *hw;

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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_irq(&hw->voice_lock);

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	hw->synth = NULL;

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	hw->get_synth_voice = NULL;

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	spin_unlock_irq(&hw->voice_lock);

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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 struct snd_seq_driver emu10k1_synth_driver = {

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	.driver = {

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		.name = KBUILD_MODNAME,

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		.probe = snd_emu10k1_synth_probe,

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		.remove = snd_emu10k1_synth_remove,

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	},

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	.id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,

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	.argsize = sizeof(struct snd_emu10k1_synth_arg),

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};

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module_snd_seq_driver(emu10k1_synth_driver);

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