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7c37ae5c62
We've used the old house-made code for binding the sequencer device and driver. This can be far better implemented with the standard bus nowadays. This patch refactors the whole sequencer binding code with the bus /sys/bus/snd_seq. The devices appear as id-card-device on this bus and are bound with the drivers corresponding to the given id like the former implementation. The module autoload is also kept like before. There is no change in API functions by this patch, and almost all transitions are kept inside seq_device.c. The proc file output will change slightly but kept compatible as much as possible. Further integration works will follow in later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
#ifndef __SOUND_SEQ_DEVICE_H
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#define __SOUND_SEQ_DEVICE_H
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/*
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* ALSA sequencer device management
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* Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
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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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/*
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* registered device information
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*/
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#define ID_LEN 32
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/* status flag */
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#define SNDRV_SEQ_DEVICE_FREE 0
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#define SNDRV_SEQ_DEVICE_REGISTERED 1
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struct snd_seq_device {
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/* device info */
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struct snd_card *card; /* sound card */
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int device; /* device number */
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char id[ID_LEN]; /* driver id */
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char name[80]; /* device name */
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int argsize; /* size of the argument */
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void *driver_data; /* private data for driver */
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int status; /* flag - read only */
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void *private_data; /* private data for the caller */
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void (*private_free)(struct snd_seq_device *device);
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struct list_head list; /* link to next device */
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struct device dev;
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};
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#define to_seq_dev(_dev) \
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container_of(_dev, struct snd_seq_device, dev)
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/* driver operators
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* init_device:
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* Initialize the device with given parameters.
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* Typically,
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* 1. call snd_hwdep_new
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* 2. allocate private data and initialize it
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* 3. call snd_hwdep_register
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* 4. store the instance to dev->driver_data pointer.
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*
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* free_device:
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* Release the private data.
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* Typically, call snd_device_free(dev->card, dev->driver_data)
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*/
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struct snd_seq_dev_ops {
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int (*init_device)(struct snd_seq_device *dev);
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int (*free_device)(struct snd_seq_device *dev);
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};
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/*
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* prototypes
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*/
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#ifdef CONFIG_MODULES
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void snd_seq_device_load_drivers(void);
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#else
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#define snd_seq_device_load_drivers()
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#endif
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int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result);
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int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, int argsize);
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int snd_seq_device_unregister_driver(char *id);
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#define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
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/*
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* id strings for generic devices
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*/
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#define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi"
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#define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth"
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#endif /* __SOUND_SEQ_DEVICE_H */
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