LXR linux/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)
  40int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
  41#else
  42int seq_client_load[15] = {[0 ... 14] = -1};
  43#endif
  44int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
  45int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
  46int seq_default_timer_card = -1;
  47int 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        ;
  56int seq_default_timer_subdevice = 0;
  57int seq_default_timer_resolution = 0;   /* Hz */
  58
  59MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
  60MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
  61MODULE_LICENSE("GPL");
  62
  63module_param_array(seq_client_load, int, NULL, 0444);
  64MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
  65module_param(seq_default_timer_class, int, 0644);
  66MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
  67module_param(seq_default_timer_sclass, int, 0644);
  68MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
  69module_param(seq_default_timer_card, int, 0644);
  70MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
  71module_param(seq_default_timer_device, int, 0644);
  72MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
  73module_param(seq_default_timer_subdevice, int, 0644);
  74MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
  75module_param(seq_default_timer_resolution, int, 0644);
  76MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
  77
  78MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER);
  79MODULE_ALIAS("devname:snd/seq");
  80
  81/*
  82 *  INIT PART
  83 */
  84
  85static 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
 118static 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
 136module_init(alsa_seq_init)
 137module_exit(alsa_seq_exit)
 138