Merge branch 'linus' into release
[linux-2.6] / sound / pci / emu10k1 / emu10k1_synth.c
1 /*
2  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
3  *
4  *  Routines for control of EMU10K1 WaveTable synth
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  */
20
21 #include "emu10k1_synth_local.h"
22 #include <linux/init.h>
23
24 MODULE_AUTHOR("Takashi Iwai");
25 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
26 MODULE_LICENSE("GPL");
27
28 /*
29  * create a new hardware dependent device for Emu10k1
30  */
31 static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)
32 {
33         struct snd_emux *emux;
34         struct snd_emu10k1 *hw;
35         struct snd_emu10k1_synth_arg *arg;
36         unsigned long flags;
37
38         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
39         if (arg == NULL)
40                 return -EINVAL;
41
42         if (arg->seq_ports <= 0)
43                 return 0; /* nothing */
44         if (arg->max_voices < 1)
45                 arg->max_voices = 1;
46         else if (arg->max_voices > 64)
47                 arg->max_voices = 64;
48
49         if (snd_emux_new(&emux) < 0)
50                 return -ENOMEM;
51
52         snd_emu10k1_ops_setup(emux);
53         hw = arg->hwptr;
54         emux->hw = hw;
55         emux->max_voices = arg->max_voices;
56         emux->num_ports = arg->seq_ports;
57         emux->pitch_shift = -501;
58         emux->memhdr = hw->memhdr;
59         /* maximum two ports */
60         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
61         /* audigy has two external midis */
62         emux->midi_devidx = hw->audigy ? 2 : 1;
63         emux->linear_panning = 0;
64         emux->hwdep_idx = 2; /* FIXED */
65
66         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
67                 snd_emux_free(emux);
68                 return -ENOMEM;
69         }
70
71         spin_lock_irqsave(&hw->voice_lock, flags);
72         hw->synth = emux;
73         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
74         spin_unlock_irqrestore(&hw->voice_lock, flags);
75
76         dev->driver_data = emux;
77
78         return 0;
79 }
80
81 static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)
82 {
83         struct snd_emux *emux;
84         struct snd_emu10k1 *hw;
85         unsigned long flags;
86
87         if (dev->driver_data == NULL)
88                 return 0; /* not registered actually */
89
90         emux = dev->driver_data;
91
92         hw = emux->hw;
93         spin_lock_irqsave(&hw->voice_lock, flags);
94         hw->synth = NULL;
95         hw->get_synth_voice = NULL;
96         spin_unlock_irqrestore(&hw->voice_lock, flags);
97
98         snd_emux_free(emux);
99         return 0;
100 }
101
102 /*
103  *  INIT part
104  */
105
106 static int __init alsa_emu10k1_synth_init(void)
107 {
108         
109         static struct snd_seq_dev_ops ops = {
110                 snd_emu10k1_synth_new_device,
111                 snd_emu10k1_synth_delete_device,
112         };
113         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,
114                                               sizeof(struct snd_emu10k1_synth_arg));
115 }
116
117 static void __exit alsa_emu10k1_synth_exit(void)
118 {
119         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
120 }
121
122 module_init(alsa_emu10k1_synth_init)
123 module_exit(alsa_emu10k1_synth_exit)