03cfe6f57d
If CONFIG_SND_DYNAMIC_MINORS is used, assign /dev/snd/seq and /dev/snd/timer the usual static minors, and export specific module aliases to generate udev module on-demand loading instructions: $ cat /lib/modules/2.6.33.4-smp/modules.devname # Device nodes to trigger on-demand module loading. microcode cpu/microcode c10:184 fuse fuse c10:229 ppp_generic ppp c108:0 tun net/tun c10:200 uinput uinput c10:223 dm_mod mapper/control c10:236 snd_timer snd/timer c116:33 snd_seq snd/seq c116:1 The last two lines instruct udev to create device nodes, even when the modules are not loaded at that time. As soon as userspace accesses any of these nodes, the in-kernel module-loader will load the module, and the device can be used. The header file minor calculation needed to be simplified to make __stringify() (supports only two indirections) in the MODULE_ALIAS macro work. This is part of systemd's effort to get rid of unconditional module load instructions and needless init scripts. Cc: Lennart Poettering <lennart@poettering.net> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
137 lines
4 KiB
C
137 lines
4 KiB
C
/*
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* ALSA sequencer main module
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* Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/seq_kernel.h>
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#include "seq_clientmgr.h"
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#include "seq_memory.h"
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#include "seq_queue.h"
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#include "seq_lock.h"
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#include "seq_timer.h"
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#include "seq_system.h"
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#include "seq_info.h"
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#include <sound/minors.h>
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#include <sound/seq_device.h>
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#if defined(CONFIG_SND_SEQ_DUMMY_MODULE)
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int seq_client_load[15] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 14] = -1};
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#else
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int seq_client_load[15] = {[0 ... 14] = -1};
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#endif
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int seq_default_timer_class = SNDRV_TIMER_CLASS_GLOBAL;
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int seq_default_timer_sclass = SNDRV_TIMER_SCLASS_NONE;
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int seq_default_timer_card = -1;
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int seq_default_timer_device =
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#ifdef CONFIG_SND_SEQ_HRTIMER_DEFAULT
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SNDRV_TIMER_GLOBAL_HRTIMER
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#elif defined(CONFIG_SND_SEQ_RTCTIMER_DEFAULT)
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SNDRV_TIMER_GLOBAL_RTC
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#else
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SNDRV_TIMER_GLOBAL_SYSTEM
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#endif
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;
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int seq_default_timer_subdevice = 0;
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int seq_default_timer_resolution = 0; /* Hz */
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MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>");
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MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer.");
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MODULE_LICENSE("GPL");
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module_param_array(seq_client_load, int, NULL, 0444);
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MODULE_PARM_DESC(seq_client_load, "The numbers of global (system) clients to load through kmod.");
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module_param(seq_default_timer_class, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_class, "The default timer class.");
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module_param(seq_default_timer_sclass, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_sclass, "The default timer slave class.");
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module_param(seq_default_timer_card, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_card, "The default timer card number.");
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module_param(seq_default_timer_device, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_device, "The default timer device number.");
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module_param(seq_default_timer_subdevice, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice number.");
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module_param(seq_default_timer_resolution, int, 0644);
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MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz.");
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MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER);
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MODULE_ALIAS("devname:snd/seq");
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/*
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* INIT PART
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*/
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static int __init alsa_seq_init(void)
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{
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int err;
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snd_seq_autoload_lock();
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if ((err = client_init_data()) < 0)
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goto error;
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/* init memory, room for selected events */
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if ((err = snd_sequencer_memory_init()) < 0)
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goto error;
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/* init event queues */
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if ((err = snd_seq_queues_init()) < 0)
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goto error;
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/* register sequencer device */
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if ((err = snd_sequencer_device_init()) < 0)
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goto error;
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/* register proc interface */
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if ((err = snd_seq_info_init()) < 0)
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goto error;
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/* register our internal client */
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if ((err = snd_seq_system_client_init()) < 0)
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goto error;
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error:
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snd_seq_autoload_unlock();
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return err;
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}
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static void __exit alsa_seq_exit(void)
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{
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/* unregister our internal client */
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snd_seq_system_client_done();
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/* unregister proc interface */
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snd_seq_info_done();
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/* delete timing queues */
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snd_seq_queues_delete();
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/* unregister sequencer device */
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snd_sequencer_device_done();
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/* release event memory */
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snd_sequencer_memory_done();
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}
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module_init(alsa_seq_init)
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module_exit(alsa_seq_exit)
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