Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
emu8000_synth.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) by Jaroslav Kysela <[email protected]>
3  * and (c) 1999 Steve Ratcliffe <[email protected]>
4  * Copyright (C) 1999-2000 Takashi Iwai <[email protected]>
5  *
6  * Emu8000 synth plug-in routine
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  */
22 
23 #include "emu8000_local.h"
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <sound/initval.h>
27 
28 MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
29 MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
30 MODULE_LICENSE("GPL");
31 
32 /*----------------------------------------------------------------*/
33 
34 /*
35  * create a new hardware dependent device for Emu8000
36  */
37 static int snd_emu8000_new_device(struct snd_seq_device *dev)
38 {
39  struct snd_emu8000 *hw;
40  struct snd_emux *emu;
41 
42  hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
43  if (hw == NULL)
44  return -EINVAL;
45 
46  if (hw->emu)
47  return -EBUSY; /* already exists..? */
48 
49  if (snd_emux_new(&emu) < 0)
50  return -ENOMEM;
51 
52  hw->emu = emu;
54 
55  emu->hw = hw;
57  emu->num_ports = hw->seq_ports;
58 
59  if (hw->memhdr) {
60  snd_printk(KERN_ERR "memhdr is already initialized!?\n");
62  }
64  if (hw->memhdr == NULL) {
65  snd_emux_free(emu);
66  hw->emu = NULL;
67  return -ENOMEM;
68  }
69 
70  emu->memhdr = hw->memhdr;
71  emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
72  emu->midi_devidx = 1;
73  emu->linear_panning = 1;
74  emu->hwdep_idx = 2; /* FIXED */
75 
76  if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
77  snd_emux_free(emu);
79  hw->emu = NULL;
80  hw->memhdr = NULL;
81  return -ENOMEM;
82  }
83 
84  if (hw->mem_size > 0)
85  snd_emu8000_pcm_new(dev->card, hw, 1);
86 
87  dev->driver_data = hw;
88 
89  return 0;
90 }
91 
92 
93 /*
94  * free all resources
95  */
96 static int snd_emu8000_delete_device(struct snd_seq_device *dev)
97 {
98  struct snd_emu8000 *hw;
99 
100  if (dev->driver_data == NULL)
101  return 0; /* no synth was allocated actually */
102 
103  hw = dev->driver_data;
104  if (hw->pcm)
105  snd_device_free(dev->card, hw->pcm);
106  if (hw->emu)
107  snd_emux_free(hw->emu);
108  if (hw->memhdr)
110  hw->emu = NULL;
111  hw->memhdr = NULL;
112  return 0;
113 }
114 
115 /*
116  * INIT part
117  */
118 
119 static int __init alsa_emu8000_init(void)
120 {
121 
122  static struct snd_seq_dev_ops ops = {
123  snd_emu8000_new_device,
124  snd_emu8000_delete_device,
125  };
127  sizeof(struct snd_emu8000*));
128 }
129 
130 static void __exit alsa_emu8000_exit(void)
131 {
133 }
134 
135 module_init(alsa_emu8000_init)
136 module_exit(alsa_emu8000_exit)