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 
12 MODULE_AUTHOR("Takashi Iwai");
13 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
14 MODULE_LICENSE("GPL");
15 
16 /*
17  * create a new hardware dependent device for Emu10k1
18  */
snd_emu10k1_synth_probe(struct device * _dev)19 static 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 	unsigned long flags;
26 
27 	arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
28 	if (arg == NULL)
29 		return -EINVAL;
30 
31 	if (arg->seq_ports <= 0)
32 		return 0; /* nothing */
33 	if (arg->max_voices < 1)
34 		arg->max_voices = 1;
35 	else if (arg->max_voices > 64)
36 		arg->max_voices = 64;
37 
38 	if (snd_emux_new(&emux) < 0)
39 		return -ENOMEM;
40 
41 	snd_emu10k1_ops_setup(emux);
42 	hw = arg->hwptr;
43 	emux->hw = hw;
44 	emux->max_voices = arg->max_voices;
45 	emux->num_ports = arg->seq_ports;
46 	emux->pitch_shift = -501;
47 	emux->memhdr = hw->memhdr;
48 	/* maximum two ports */
49 	emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
50 	/* audigy has two external midis */
51 	emux->midi_devidx = hw->audigy ? 2 : 1;
52 	emux->linear_panning = 0;
53 	emux->hwdep_idx = 2; /* FIXED */
54 
55 	if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
56 		snd_emux_free(emux);
57 		return -ENOMEM;
58 	}
59 
60 	spin_lock_irqsave(&hw->voice_lock, flags);
61 	hw->synth = emux;
62 	hw->get_synth_voice = snd_emu10k1_synth_get_voice;
63 	spin_unlock_irqrestore(&hw->voice_lock, flags);
64 
65 	dev->driver_data = emux;
66 
67 	return 0;
68 }
69 
snd_emu10k1_synth_remove(struct device * _dev)70 static int snd_emu10k1_synth_remove(struct device *_dev)
71 {
72 	struct snd_seq_device *dev = to_seq_dev(_dev);
73 	struct snd_emux *emux;
74 	struct snd_emu10k1 *hw;
75 	unsigned long flags;
76 
77 	if (dev->driver_data == NULL)
78 		return 0; /* not registered actually */
79 
80 	emux = dev->driver_data;
81 
82 	hw = emux->hw;
83 	spin_lock_irqsave(&hw->voice_lock, flags);
84 	hw->synth = NULL;
85 	hw->get_synth_voice = NULL;
86 	spin_unlock_irqrestore(&hw->voice_lock, flags);
87 
88 	snd_emux_free(emux);
89 	return 0;
90 }
91 
92 /*
93  *  INIT part
94  */
95 
96 static struct snd_seq_driver emu10k1_synth_driver = {
97 	.driver = {
98 		.name = KBUILD_MODNAME,
99 		.probe = snd_emu10k1_synth_probe,
100 		.remove = snd_emu10k1_synth_remove,
101 	},
102 	.id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
103 	.argsize = sizeof(struct snd_emu10k1_synth_arg),
104 };
105 
106 module_snd_seq_driver(emu10k1_synth_driver);
107