LXR linux/sound/core/seq/seq.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  ALSA sequencer main module
   4 *  Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
   5 */
   6
   7#include <linux/init.h>
   8#include <linux/module.h>
   9#include <linux/device.h>
  10#include <sound/core.h>
  11#include <sound/initval.h>
  12
  13#include <sound/seq_kernel.h>
  14#include "seq_clientmgr.h"
  15#include "seq_memory.h"
  16#include "seq_queue.h"
  17#include "seq_lock.h"
  18#include "seq_timer.h"
  19#include "seq_system.h"
  20#include "seq_info.h"
  21#include <sound/minors.h>
  22#include <sound/seq_device.h>
  23
  24#if defined(CONFIG_SND_SEQ_DUMMY_MODULE)
  25int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
  26#else
  27int seq_client_load[15] = {[0 ... 14] = -1};
  28#endif
  29int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
  30int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
  31int seq_default_timer_card = -1;
  32int seq_default_timer_device =
  33#ifdef CONFIG_SND_SEQ_HRTIMER_DEFAULT
  34        SNDRV_TIMER_GLOBAL_HRTIMER
  35#else
  36        SNDRV_TIMER_GLOBAL_SYSTEM
  37#endif
  38        ;
  39int seq_default_timer_subdevice = 0;
  40int seq_default_timer_resolution = 0;   /* Hz */
  41
  42MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
  43MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
  44MODULE_LICENSE("GPL");
  45
  46module_param_array(seq_client_load, int, NULL, 0444);
  47MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
  48module_param(seq_default_timer_class, int, 0644);
  49MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
  50module_param(seq_default_timer_sclass, int, 0644);
  51MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
  52module_param(seq_default_timer_card, int, 0644);
  53MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
  54module_param(seq_default_timer_device, int, 0644);
  55MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
  56module_param(seq_default_timer_subdevice, int, 0644);
  57MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
  58module_param(seq_default_timer_resolution, int, 0644);
  59MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
  60
  61MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER);
  62MODULE_ALIAS("devname:snd/seq");
  63
  64/*
  65 *  INIT PART
  66 */
  67
  68static int __init alsa_seq_init(void)
  69{
  70        int err;
  71
  72        err = client_init_data();
  73        if (err < 0)
  74                goto error;
  75
  76        /* register sequencer device */
  77        err = snd_sequencer_device_init();
  78        if (err < 0)
  79                goto error;
  80
  81        /* register proc interface */
  82        err = snd_seq_info_init();
  83        if (err < 0)
  84                goto error_device;
  85
  86        /* register our internal client */
  87        err = snd_seq_system_client_init();
  88        if (err < 0)
  89                goto error_info;
  90
  91        snd_seq_autoload_init();
  92        return 0;
  93
  94 error_info:
  95        snd_seq_info_done();
  96 error_device:
  97        snd_sequencer_device_done();
  98 error:
  99        return err;
 100}
 101
 102static void __exit alsa_seq_exit(void)
 103{
 104        /* unregister our internal client */
 105        snd_seq_system_client_done();
 106
 107        /* unregister proc interface */
 108        snd_seq_info_done();
 109        
 110        /* delete timing queues */
 111        snd_seq_queues_delete();
 112
 113        /* unregister sequencer device */
 114        snd_sequencer_device_done();
 115
 116        snd_seq_autoload_exit();
 117}
 118
 119module_init(alsa_seq_init)
 120module_exit(alsa_seq_exit)
 121