1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
4 *
5 * Routines for control of EMU10K1 WaveTable synth
6 */
7
8#include "emu10k1_synth_local.h"
9#include <linux/init.h>
10#include <linux/module.h>
11
12MODULE_AUTHOR("Takashi Iwai");
13MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
14MODULE_LICENSE("GPL");
15
16/*
17 * create a new hardware dependent device for Emu10k1
18 */
19static int snd_emu10k1_synth_probe(struct device *_dev)
20{
21 struct snd_seq_device *dev = to_seq_dev(_dev);
22 struct snd_emux *emux;
23 struct snd_emu10k1 *hw;
24 struct snd_emu10k1_synth_arg *arg;
25
26 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
27 if (arg == NULL)
28 return -EINVAL;
29
30 if (arg->seq_ports <= 0)
31 return 0; /* nothing */
32 if (arg->max_voices < 1)
33 arg->max_voices = 1;
34 else if (arg->max_voices > 64)
35 arg->max_voices = 64;
36
37 if (snd_emux_new(remu: &emux) < 0)
38 return -ENOMEM;
39
40 snd_emu10k1_ops_setup(emu: emux);
41 hw = arg->hwptr;
42 emux->hw = hw;
43 emux->max_voices = arg->max_voices;
44 emux->num_ports = arg->seq_ports;
45 emux->memhdr = hw->memhdr;
46 /* maximum two ports */
47 emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
48 /* audigy has two external midis */
49 emux->midi_devidx = hw->audigy ? 2 : 1;
50 emux->linear_panning = 0;
51 emux->hwdep_idx = 2; /* FIXED */
52
53 if (snd_emux_register(emu: emux, card: dev->card, index: arg->index, name: "Emu10k1") < 0) {
54 snd_emux_free(emu: emux);
55 return -ENOMEM;
56 }
57
58 spin_lock_irq(lock: &hw->voice_lock);
59 hw->synth = emux;
60 hw->get_synth_voice = snd_emu10k1_synth_get_voice;
61 spin_unlock_irq(lock: &hw->voice_lock);
62
63 dev->driver_data = emux;
64
65 return 0;
66}
67
68static int snd_emu10k1_synth_remove(struct device *_dev)
69{
70 struct snd_seq_device *dev = to_seq_dev(_dev);
71 struct snd_emux *emux;
72 struct snd_emu10k1 *hw;
73
74 if (dev->driver_data == NULL)
75 return 0; /* not registered actually */
76
77 emux = dev->driver_data;
78
79 hw = emux->hw;
80 spin_lock_irq(lock: &hw->voice_lock);
81 hw->synth = NULL;
82 hw->get_synth_voice = NULL;
83 spin_unlock_irq(lock: &hw->voice_lock);
84
85 snd_emux_free(emu: emux);
86 return 0;
87}
88
89/*
90 * INIT part
91 */
92
93static struct snd_seq_driver emu10k1_synth_driver = {
94 .driver = {
95 .name = KBUILD_MODNAME,
96 .probe = snd_emu10k1_synth_probe,
97 .remove = snd_emu10k1_synth_remove,
98 },
99 .id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
100 .argsize = sizeof(struct snd_emu10k1_synth_arg),
101};
102
103module_snd_seq_driver(emu10k1_synth_driver);
104

source code of linux/sound/pci/emu10k1/emu10k1_synth.c