root/sound/core/seq/seq.c

DEFINITIONS

1. alsa_seq_init
2. alsa_seq_exit

   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)
  25 int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
  26 #else
  27 int seq_client_load[15] = {[0 ... 14] = -1};
  28 #endif
  29 int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
  30 int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
  31 int seq_default_timer_card = -1;
  32 int 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         ;
  39 int seq_default_timer_subdevice = 0;
  40 int seq_default_timer_resolution = 0;   /* Hz */
  41 
  42 MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
  43 MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
  44 MODULE_LICENSE("GPL");
  45 
  46 module_param_array(seq_client_load, int, NULL, 0444);
  47 MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
  48 module_param(seq_default_timer_class, int, 0644);
  49 MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
  50 module_param(seq_default_timer_sclass, int, 0644);
  51 MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
  52 module_param(seq_default_timer_card, int, 0644);
  53 MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
  54 module_param(seq_default_timer_device, int, 0644);
  55 MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
  56 module_param(seq_default_timer_subdevice, int, 0644);
  57 MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
  58 module_param(seq_default_timer_resolution, int, 0644);
  59 MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
  60 
  61 MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER);
  62 MODULE_ALIAS("devname:snd/seq");
  63 
  64 /*
  65  *  INIT PART
  66  */
  67 
  68 static 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 
 102 static 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 
 119 module_init(alsa_seq_init)
 120 module_exit(alsa_seq_exit)