sound/core/seq/seq.c

   1 /*
   2  *  ALSA sequencer main module
   3  *  Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
   4  *
   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
  22 #include <linux/init.h>
  23 #include <linux/moduleparam.h>
  24 #include <sound/core.h>
  25 #include <sound/initval.h>
  26
  27 #include <sound/seq_kernel.h>
  28 #include "seq_clientmgr.h"
  29 #include "seq_memory.h"
  30 #include "seq_queue.h"
  31 #include "seq_lock.h"
  32 #include "seq_timer.h"
  33 #include "seq_system.h"
  34 #include "seq_info.h"
  35 #include <sound/minors.h>
  36 #include <sound/seq_device.h>
  37
  38 #if defined(CONFIG_SND_SEQ_DUMMY_MODULE)
  39 int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
  40 #else
  41 int seq_client_load[15] = {[0 ... 14] = -1};
  42 #endif
  43 int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
  44 int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
  45 int seq_default_timer_card = -1;
  46 int seq_default_timer_device =
  47 #ifdef CONFIG_SND_SEQ_HRTIMER_DEFAULT
  48         SNDRV_TIMER_GLOBAL_HRTIMER
  49 #elif defined(CONFIG_SND_SEQ_RTCTIMER_DEFAULT)
  50         SNDRV_TIMER_GLOBAL_RTC
  51 #else
  52         SNDRV_TIMER_GLOBAL_SYSTEM
  53 #endif
  54         ;
  55 int seq_default_timer_subdevice = 0;
  56 int seq_default_timer_resolution = 0;   /* Hz */
  57
  58 MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
  59 MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
  60 MODULE_LICENSE("GPL");
  61
  62 module_param_array(seq_client_load, int, NULL, 0444);
  63 MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
  64 module_param(seq_default_timer_class, int, 0644);
  65 MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
  66 module_param(seq_default_timer_sclass, int, 0644);
  67 MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
  68 module_param(seq_default_timer_card, int, 0644);
  69 MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
  70 module_param(seq_default_timer_device, int, 0644);
  71 MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
  72 module_param(seq_default_timer_subdevice, int, 0644);
  73 MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
  74 module_param(seq_default_timer_resolution, int, 0644);
  75 MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
  76
  77 MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER);
  78 MODULE_ALIAS("devname:snd/seq");
  79
  80 /*
  81  *  INIT PART
  82  */
  83
  84 static int __init alsa_seq_init(void)
  85 {
  86         int err;
  87
  88         snd_seq_autoload_lock();
  89         if ((err = client_init_data()) < 0)
  90                 goto error;
  91
  92         /* init memory, room for selected events */
  93         if ((err = snd_sequencer_memory_init()) < 0)
  94                 goto error;
  95
  96         /* init event queues */
  97         if ((err = snd_seq_queues_init()) < 0)
  98                 goto error;
  99
 100         /* register sequencer device */
 101         if ((err = snd_sequencer_device_init()) < 0)
 102                 goto error;
 103
 104         /* register proc interface */
 105         if ((err = snd_seq_info_init()) < 0)
 106                 goto error;
 107
 108         /* register our internal client */
 109         if ((err = snd_seq_system_client_init()) < 0)
 110                 goto error;
 111
 112  error:
 113         snd_seq_autoload_unlock();
 114         return err;
 115 }
 116
 117 static void __exit alsa_seq_exit(void)
 118 {
 119         /* unregister our internal client */
 120         snd_seq_system_client_done();
 121
 122         /* unregister proc interface */
 123         snd_seq_info_done();
 124
 125         /* delete timing queues */
 126         snd_seq_queues_delete();
 127
 128         /* unregister sequencer device */
 129         snd_sequencer_device_done();
 130
 131         /* release event memory */
 132         snd_sequencer_memory_done();
 133 }
 134
 135 module_init(alsa_seq_init)
 136 module_exit(alsa_seq_exit)