source: GPL/alsa-kernel/include/sound/timer.old@ 1

Last change on this file since 1 was 1, checked in by vladest, 20 years ago

initial import
File size: 6.7 KB
Line 
1#ifndef __SOUND_TIMER_H
2#define __SOUND_TIMER_H
3
4/*
5 * Timer abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>,
7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <linux/interrupt.h>
28
29typedef enum sndrv_timer_class snd_timer_class_t;
30typedef enum sndrv_timer_slave_class snd_timer_slave_class_t;
31//typedef enum sndrv_timer_global snd_timer_global_t;
32typedef struct sndrv_timer_id snd_timer_id_t;
33typedef struct sndrv_timer_ginfo snd_timer_ginfo_t;
34typedef struct sndrv_timer_gparams snd_timer_gparams_t;
35typedef struct sndrv_timer_gstatus snd_timer_gstatus_t;
36typedef struct sndrv_timer_select snd_timer_select_t;
37typedef struct sndrv_timer_info snd_timer_info_t;
38typedef struct sndrv_timer_params snd_timer_params_t;
39typedef struct sndrv_timer_status snd_timer_status_t;
40typedef struct sndrv_timer_read snd_timer_read_t;
41typedef struct sndrv_timer_tread snd_timer_tread_t;
42
43#define snd_timer_chip(timer) ((timer)->private_data)
44
45#define SNDRV_TIMER_DEVICES 16
46
47#define SNDRV_TIMER_DEV_FLG_PCM 0x10000000
48
49#define SNDRV_TIMER_HW_AUTO 0x00000001 /* auto trigger is supported */
50#define SNDRV_TIMER_HW_STOP 0x00000002 /* call stop before start */
51#define SNDRV_TIMER_HW_SLAVE 0x00000004 /* only slave timer (variable resolution) */
52#define SNDRV_TIMER_HW_FIRST 0x00000008 /* first tick can be incomplete */
53#define SNDRV_TIMER_HW_TASKLET 0x00000010 /* timer is called from tasklet */
54
55#define SNDRV_TIMER_IFLG_SLAVE 0x00000001
56#define SNDRV_TIMER_IFLG_RUNNING 0x00000002
57#define SNDRV_TIMER_IFLG_START 0x00000004
58#define SNDRV_TIMER_IFLG_AUTO 0x00000008 /* auto restart */
59#define SNDRV_TIMER_IFLG_FAST 0x00000010 /* fast callback (do not use tasklet) */
60#define SNDRV_TIMER_IFLG_CALLBACK 0x00000020 /* timer callback is active */
61#define SNDRV_TIMER_IFLG_EXCLUSIVE 0x00000040 /* exclusive owner - no more instances */
62#define SNDRV_TIMER_IFLG_EARLY_EVENT 0x00000080 /* write early event to the poll queue */
63
64#define SNDRV_TIMER_FLG_CHANGE 0x00000001
65#define SNDRV_TIMER_FLG_RESCHED 0x00000002 /* need reschedule */
66
67typedef void (*snd_timer_callback_t) (snd_timer_instance_t * timeri, unsigned long ticks, unsigned long resolution);
68typedef void (*snd_timer_ccallback_t) (snd_timer_instance_t * timeri, enum sndrv_timer_event event,
69 struct timespec * tstamp, unsigned long resolution);
70
71struct timespec1 {
72 long tv_sec; /* seconds */
73 long tv_usec; /* and microseconds */
74};
75
76#define timespec timespec1
77
78struct _snd_timer_hardware {
79 /* -- must be filled with low-level driver */
80 unsigned int flags; /* various flags */
81 unsigned long resolution; /* average timer resolution for one tick in nsec */
82 unsigned long resolution_min; /* minimal resolution */
83 unsigned long resolution_max; /* maximal resolution */
84 unsigned long ticks; /* max timer ticks per interrupt */
85 /* -- low-level functions -- */
86 int (*open) (snd_timer_t * timer);
87 int (*close) (snd_timer_t * timer);
88 unsigned long (*c_resolution) (snd_timer_t * timer);
89 int (*start) (snd_timer_t * timer);
90 int (*stop) (snd_timer_t * timer);
91 int (*set_period) (snd_timer_t * timer, unsigned long period_num, unsigned long period_den);
92 int (*precise_resolution) (snd_timer_t * timer, unsigned long *num, unsigned long *den);
93};
94
95struct _snd_timer {
96 snd_timer_class_t tmr_class;
97 snd_card_t *card;
98 int tmr_device;
99 int tmr_subdevice;
100 char id[64];
101 char name[80];
102 unsigned int flags;
103 int running; /* running instances */
104 unsigned long sticks; /* schedule ticks */
105 void *private_data;
106 void (*private_free) (snd_timer_t *timer);
107 struct _snd_timer_hardware hw;
108 spinlock_t lock;
109 struct list_head device_list;
110 struct list_head open_list_head;
111 struct list_head active_list_head;
112 struct list_head ack_list_head;
113 struct list_head sack_list_head; /* slow ack list head */
114 struct tasklet_struct task_queue;
115};
116
117struct _snd_timer_instance {
118 snd_timer_t * timer;
119 char *owner;
120 unsigned int flags;
121 void *private_data;
122 void (*private_free) (snd_timer_instance_t *ti);
123 snd_timer_callback_t callback;
124 snd_timer_ccallback_t ccallback;
125 void *callback_data;
126 unsigned long ticks; /* auto-load ticks when expired */
127 unsigned long cticks; /* current ticks */
128 unsigned long pticks; /* accumulated ticks for callback */
129 unsigned long resolution; /* current resolution for tasklet */
130 unsigned long lost; /* lost ticks */
131 snd_timer_slave_class_t slave_class;
132 unsigned int slave_id;
133 struct list_head open_list;
134 struct list_head active_list;
135 struct list_head ack_list;
136 struct list_head slave_list_head;
137 struct list_head slave_active_head;
138 snd_timer_instance_t *master;
139};
140
141/*
142 * Registering
143 */
144
145extern int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, snd_timer_t ** rtimer);
146extern void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct timespec *tstamp);
147extern int snd_timer_global_new(char *id, int device, snd_timer_t **rtimer);
148extern int snd_timer_global_free(snd_timer_t *timer);
149extern int snd_timer_global_register(snd_timer_t *timer);
150extern int snd_timer_global_unregister(snd_timer_t *timer);
151
152extern int snd_timer_open(snd_timer_instance_t ** ti, char *owner, snd_timer_id_t *tid, unsigned int slave_id);
153extern int snd_timer_close(snd_timer_instance_t * timeri);
154extern unsigned long snd_timer_resolution(snd_timer_instance_t * timeri);
155extern int snd_timer_start(snd_timer_instance_t * timeri, unsigned int ticks);
156extern int snd_timer_stop(snd_timer_instance_t * timeri);
157extern int snd_timer_continue(snd_timer_instance_t * timeri);
158extern int snd_timer_pause(snd_timer_instance_t * timeri);
159
160extern void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left);
161
162extern unsigned int snd_timer_system_resolution(void);
163
164#endif /* __SOUND_TIMER_H */
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