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71e2e1c147
Just like PCM, allow hwdep to be assigned to a different parent device than the card. It'll be used for the HD-audio codec device in the later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
#ifndef __SOUND_HWDEP_H
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#define __SOUND_HWDEP_H
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/*
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* Hardware dependent layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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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/asound.h>
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#include <linux/poll.h>
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struct snd_hwdep;
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/* hwdep file ops; all ops can be NULL */
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struct snd_hwdep_ops {
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long long (*llseek)(struct snd_hwdep *hw, struct file *file,
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long long offset, int orig);
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long (*read)(struct snd_hwdep *hw, char __user *buf,
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long count, loff_t *offset);
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long (*write)(struct snd_hwdep *hw, const char __user *buf,
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long count, loff_t *offset);
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int (*open)(struct snd_hwdep *hw, struct file * file);
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int (*release)(struct snd_hwdep *hw, struct file * file);
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unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,
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poll_table *wait);
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int (*ioctl)(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg);
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int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg);
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int (*mmap)(struct snd_hwdep *hw, struct file *file,
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struct vm_area_struct *vma);
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int (*dsp_status)(struct snd_hwdep *hw,
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struct snd_hwdep_dsp_status *status);
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int (*dsp_load)(struct snd_hwdep *hw,
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struct snd_hwdep_dsp_image *image);
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};
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struct snd_hwdep {
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struct snd_card *card;
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struct list_head list;
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int device;
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char id[32];
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char name[80];
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int iface;
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#ifdef CONFIG_SND_OSSEMUL
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int oss_type;
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int ossreg;
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#endif
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struct snd_hwdep_ops ops;
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wait_queue_head_t open_wait;
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void *private_data;
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void (*private_free) (struct snd_hwdep *hwdep);
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struct device *dev;
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const struct attribute_group **groups;
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struct mutex open_mutex;
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int used; /* reference counter */
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unsigned int dsp_loaded; /* bit fields of loaded dsp indices */
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unsigned int exclusive:1; /* exclusive access mode */
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};
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extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
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struct snd_hwdep **rhwdep);
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#endif /* __SOUND_HWDEP_H */
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