Merge branch 'imx/compile-fixes' of git://git.linaro.org/people/shawnguo/linux-2...
[pandora-kernel.git] / 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 #include <linux/module.h>
24
25 MODULE_AUTHOR("Takashi Iwai");
26 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
27 MODULE_LICENSE("GPL");
28
29 /*
30  * create a new hardware dependent device for Emu10k1
31  */
32 static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)
33 {
34         struct snd_emux *emux;
35         struct snd_emu10k1 *hw;
36         struct snd_emu10k1_synth_arg *arg;
37         unsigned long flags;
38
39         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
40         if (arg == NULL)
41                 return -EINVAL;
42
43         if (arg->seq_ports <= 0)
44                 return 0; /* nothing */
45         if (arg->max_voices < 1)
46                 arg->max_voices = 1;
47         else if (arg->max_voices > 64)
48                 arg->max_voices = 64;
49
50         if (snd_emux_new(&emux) < 0)
51                 return -ENOMEM;
52
53         snd_emu10k1_ops_setup(emux);
54         hw = arg->hwptr;
55         emux->hw = hw;
56         emux->max_voices = arg->max_voices;
57         emux->num_ports = arg->seq_ports;
58         emux->pitch_shift = -501;
59         emux->memhdr = hw->memhdr;
60         /* maximum two ports */
61         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
62         /* audigy has two external midis */
63         emux->midi_devidx = hw->audigy ? 2 : 1;
64         emux->linear_panning = 0;
65         emux->hwdep_idx = 2; /* FIXED */
66
67         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
68                 snd_emux_free(emux);
69                 return -ENOMEM;
70         }
71
72         spin_lock_irqsave(&hw->voice_lock, flags);
73         hw->synth = emux;
74         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
75         spin_unlock_irqrestore(&hw->voice_lock, flags);
76
77         dev->driver_data = emux;
78
79         return 0;
80 }
81
82 static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)
83 {
84         struct snd_emux *emux;
85         struct snd_emu10k1 *hw;
86         unsigned long flags;
87
88         if (dev->driver_data == NULL)
89                 return 0; /* not registered actually */
90
91         emux = dev->driver_data;
92
93         hw = emux->hw;
94         spin_lock_irqsave(&hw->voice_lock, flags);
95         hw->synth = NULL;
96         hw->get_synth_voice = NULL;
97         spin_unlock_irqrestore(&hw->voice_lock, flags);
98
99         snd_emux_free(emux);
100         return 0;
101 }
102
103 /*
104  *  INIT part
105  */
106
107 static int __init alsa_emu10k1_synth_init(void)
108 {
109         
110         static struct snd_seq_dev_ops ops = {
111                 snd_emu10k1_synth_new_device,
112                 snd_emu10k1_synth_delete_device,
113         };
114         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,
115                                               sizeof(struct snd_emu10k1_synth_arg));
116 }
117
118 static void __exit alsa_emu10k1_synth_exit(void)
119 {
120         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
121 }
122
123 module_init(alsa_emu10k1_synth_init)
124 module_exit(alsa_emu10k1_synth_exit)