release/src-rt-6.x.4708/linux/linux-2.6.36/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/seq_device.h>
  36
  37 #if defined(CONFIG_SND_SEQ_DUMMY_MODULE)
  38 int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
  39 #else
  40 int seq_client_load[15] = {[0 ... 14] = -1};
  41 #endif
  42 int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
  43 int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
  44 int seq_default_timer_card = -1;
  45 int seq_default_timer_device =
  46 #ifdef CONFIG_SND_SEQ_HRTIMER_DEFAULT
  47         SNDRV_TIMER_GLOBAL_HRTIMER
  48 #elif defined(CONFIG_SND_SEQ_RTCTIMER_DEFAULT)
  49         SNDRV_TIMER_GLOBAL_RTC
  50 #else
  51         SNDRV_TIMER_GLOBAL_SYSTEM
  52 #endif
  53         ;
  54 int seq_default_timer_subdevice = 0;
  55 int seq_default_timer_resolution = 0;   /* Hz */
  56
  57 MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
  58 MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
  59 MODULE_LICENSE("GPL");
  60
  61 module_param_array(seq_client_load, int, NULL, 0444);
  62 MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
  63 module_param(seq_default_timer_class, int, 0644);
  64 MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
  65 module_param(seq_default_timer_sclass, int, 0644);
  66 MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
  67 module_param(seq_default_timer_card, int, 0644);
  68 MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
  69 module_param(seq_default_timer_device, int, 0644);
  70 MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
  71 module_param(seq_default_timer_subdevice, int, 0644);
  72 MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
  73 module_param(seq_default_timer_resolution, int, 0644);
  74 MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
  75
  76 /*
  77  *  INIT PART
  78  */
  79
  80 static int __init alsa_seq_init(void)
  81 {
  82         int err;
  83
  84         snd_seq_autoload_lock();
  85         if ((err = client_init_data()) < 0)
  86                 goto error;
  87
  88         /* init memory, room for selected events */
  89         if ((err = snd_sequencer_memory_init()) < 0)
  90                 goto error;
  91
  92         /* init event queues */
  93         if ((err = snd_seq_queues_init()) < 0)
  94                 goto error;
  95
  96         /* register sequencer device */
  97         if ((err = snd_sequencer_device_init()) < 0)
  98                 goto error;
  99
 100         /* register proc interface */
 101         if ((err = snd_seq_info_init()) < 0)
 102                 goto error;
 103
 104         /* register our internal client */
 105         if ((err = snd_seq_system_client_init()) < 0)
 106                 goto error;
 107
 108  error:
 109         snd_seq_autoload_unlock();
 110         return err;
 111 }
 112
 113 static void __exit alsa_seq_exit(void)
 114 {
 115         /* unregister our internal client */
 116         snd_seq_system_client_done();
 117
 118         /* unregister proc interface */
 119         snd_seq_info_done();
 120
 121         /* delete timing queues */
 122         snd_seq_queues_delete();
 123
 124         /* unregister sequencer device */
 125         snd_sequencer_device_done();
 126
 127         /* release event memory */
 128         snd_sequencer_memory_done();
 129 }
 130
 131 module_init(alsa_seq_init)
 132 module_exit(alsa_seq_exit)