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