1 #ifndef __SOUND_HWDEP_H 2 #define __SOUND_HWDEP_H 3 4 /* 5 * Hardware dependent layer 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 #include <sound/asound.h> 26 #include <linux/poll.h> 27 28 struct snd_hwdep; 29 30 /* hwdep file ops; all ops can be NULL */ 31 struct snd_hwdep_ops { 32 long long (*llseek)(struct snd_hwdep *hw, struct file *file, 33 long long offset, int orig); 34 long (*read)(struct snd_hwdep *hw, char __user *buf, 35 long count, loff_t *offset); 36 long (*write)(struct snd_hwdep *hw, const char __user *buf, 37 long count, loff_t *offset); 38 int (*open)(struct snd_hwdep *hw, struct file * file); 39 int (*release)(struct snd_hwdep *hw, struct file * file); 40 unsigned int (*poll)(struct snd_hwdep *hw, struct file *file, 41 poll_table *wait); 42 int (*ioctl)(struct snd_hwdep *hw, struct file *file, 43 unsigned int cmd, unsigned long arg); 44 int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file, 45 unsigned int cmd, unsigned long arg); 46 int (*mmap)(struct snd_hwdep *hw, struct file *file, 47 struct vm_area_struct *vma); 48 int (*dsp_status)(struct snd_hwdep *hw, 49 struct snd_hwdep_dsp_status *status); 50 int (*dsp_load)(struct snd_hwdep *hw, 51 struct snd_hwdep_dsp_image *image); 52 }; 53 54 struct snd_hwdep { 55 struct snd_card *card; 56 struct list_head list; 57 int device; 58 char id[32]; 59 char name[80]; 60 int iface; 61 62 #ifdef CONFIG_SND_OSSEMUL 63 char oss_dev[32]; 64 int oss_type; 65 int ossreg; 66 #endif 67 68 struct snd_hwdep_ops ops; 69 wait_queue_head_t open_wait; 70 void *private_data; 71 void (*private_free) (struct snd_hwdep *hwdep); 72 73 struct mutex open_mutex; 74 int used; /* reference counter */ 75 unsigned int dsp_loaded; /* bit fields of loaded dsp indices */ 76 unsigned int exclusive:1; /* exclusive access mode */ 77 }; 78 79 extern int snd_hwdep_new(struct snd_card *card, char *id, int device, 80 struct snd_hwdep **rhwdep); 81 82 #endif /* __SOUND_HWDEP_H */ 83