a4f508b27c
ALSA Core,ALSA sequencer Add an option to make the RTC timer the default sequencer timer. This becomes necessary for precise MIDI timing when the system timer runs at less than 1000 Hz. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
153 lines
4.6 KiB
C
153 lines
4.6 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 <sound/driver.h>
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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/seq_device.h>
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#if defined(CONFIG_SND_SEQ_DUMMY_MODULE)
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int seq_client_load[64] = {[0] = SNDRV_SEQ_CLIENT_DUMMY, [1 ... 63] = -1};
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#else
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int seq_client_load[64] = {[0 ... 63] = -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_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@suse.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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/*
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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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/* seq_clientmgr.c */
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EXPORT_SYMBOL(snd_seq_create_kernel_client);
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EXPORT_SYMBOL(snd_seq_delete_kernel_client);
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EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
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EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
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EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
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EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
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EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
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EXPORT_SYMBOL(snd_seq_set_queue_tempo);
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/* seq_memory.c */
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EXPORT_SYMBOL(snd_seq_expand_var_event);
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EXPORT_SYMBOL(snd_seq_dump_var_event);
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/* seq_ports.c */
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EXPORT_SYMBOL(snd_seq_event_port_attach);
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EXPORT_SYMBOL(snd_seq_event_port_detach);
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/* seq_lock.c */
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#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG)
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/*EXPORT_SYMBOL(snd_seq_sleep_in_lock);*/
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/*EXPORT_SYMBOL(snd_seq_sleep_timeout_in_lock);*/
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EXPORT_SYMBOL(snd_use_lock_sync_helper);
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#endif
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