Root/
1 | #ifndef __SOUND_TIMER_H |
2 | #define __SOUND_TIMER_H |
3 | |
4 | /* |
5 | * Timer abstract layer |
6 | * Copyright (c) by Jaroslav Kysela <perex@perex.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 | |
29 | #define snd_timer_chip(timer) ((timer)->private_data) |
30 | |
31 | #define SNDRV_TIMER_DEVICES 16 |
32 | |
33 | #define SNDRV_TIMER_DEV_FLG_PCM 0x10000000 |
34 | |
35 | #define SNDRV_TIMER_HW_AUTO 0x00000001 /* auto trigger is supported */ |
36 | #define SNDRV_TIMER_HW_STOP 0x00000002 /* call stop before start */ |
37 | #define SNDRV_TIMER_HW_SLAVE 0x00000004 /* only slave timer (variable resolution) */ |
38 | #define SNDRV_TIMER_HW_FIRST 0x00000008 /* first tick can be incomplete */ |
39 | #define SNDRV_TIMER_HW_TASKLET 0x00000010 /* timer is called from tasklet */ |
40 | |
41 | #define SNDRV_TIMER_IFLG_SLAVE 0x00000001 |
42 | #define SNDRV_TIMER_IFLG_RUNNING 0x00000002 |
43 | #define SNDRV_TIMER_IFLG_START 0x00000004 |
44 | #define SNDRV_TIMER_IFLG_AUTO 0x00000008 /* auto restart */ |
45 | #define SNDRV_TIMER_IFLG_FAST 0x00000010 /* fast callback (do not use tasklet) */ |
46 | #define SNDRV_TIMER_IFLG_CALLBACK 0x00000020 /* timer callback is active */ |
47 | #define SNDRV_TIMER_IFLG_EXCLUSIVE 0x00000040 /* exclusive owner - no more instances */ |
48 | #define SNDRV_TIMER_IFLG_EARLY_EVENT 0x00000080 /* write early event to the poll queue */ |
49 | |
50 | #define SNDRV_TIMER_FLG_CHANGE 0x00000001 |
51 | #define SNDRV_TIMER_FLG_RESCHED 0x00000002 /* need reschedule */ |
52 | |
53 | struct snd_timer; |
54 | |
55 | struct snd_timer_hardware { |
56 | /* -- must be filled with low-level driver */ |
57 | unsigned int flags; /* various flags */ |
58 | unsigned long resolution; /* average timer resolution for one tick in nsec */ |
59 | unsigned long resolution_min; /* minimal resolution */ |
60 | unsigned long resolution_max; /* maximal resolution */ |
61 | unsigned long ticks; /* max timer ticks per interrupt */ |
62 | /* -- low-level functions -- */ |
63 | int (*open) (struct snd_timer * timer); |
64 | int (*close) (struct snd_timer * timer); |
65 | unsigned long (*c_resolution) (struct snd_timer * timer); |
66 | int (*start) (struct snd_timer * timer); |
67 | int (*stop) (struct snd_timer * timer); |
68 | int (*set_period) (struct snd_timer * timer, unsigned long period_num, unsigned long period_den); |
69 | int (*precise_resolution) (struct snd_timer * timer, unsigned long *num, unsigned long *den); |
70 | }; |
71 | |
72 | struct snd_timer { |
73 | int tmr_class; |
74 | struct snd_card *card; |
75 | struct module *module; |
76 | int tmr_device; |
77 | int tmr_subdevice; |
78 | char id[64]; |
79 | char name[80]; |
80 | unsigned int flags; |
81 | int running; /* running instances */ |
82 | unsigned long sticks; /* schedule ticks */ |
83 | void *private_data; |
84 | void (*private_free) (struct snd_timer *timer); |
85 | struct snd_timer_hardware hw; |
86 | spinlock_t lock; |
87 | struct list_head device_list; |
88 | struct list_head open_list_head; |
89 | struct list_head active_list_head; |
90 | struct list_head ack_list_head; |
91 | struct list_head sack_list_head; /* slow ack list head */ |
92 | struct tasklet_struct task_queue; |
93 | }; |
94 | |
95 | struct snd_timer_instance { |
96 | struct snd_timer *timer; |
97 | char *owner; |
98 | unsigned int flags; |
99 | void *private_data; |
100 | void (*private_free) (struct snd_timer_instance *ti); |
101 | void (*callback) (struct snd_timer_instance *timeri, |
102 | unsigned long ticks, unsigned long resolution); |
103 | void (*ccallback) (struct snd_timer_instance * timeri, |
104 | int event, |
105 | struct timespec * tstamp, |
106 | unsigned long resolution); |
107 | void *callback_data; |
108 | unsigned long ticks; /* auto-load ticks when expired */ |
109 | unsigned long cticks; /* current ticks */ |
110 | unsigned long pticks; /* accumulated ticks for callback */ |
111 | unsigned long resolution; /* current resolution for tasklet */ |
112 | unsigned long lost; /* lost ticks */ |
113 | int slave_class; |
114 | unsigned int slave_id; |
115 | struct list_head open_list; |
116 | struct list_head active_list; |
117 | struct list_head ack_list; |
118 | struct list_head slave_list_head; |
119 | struct list_head slave_active_head; |
120 | struct snd_timer_instance *master; |
121 | }; |
122 | |
123 | /* |
124 | * Registering |
125 | */ |
126 | |
127 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, struct snd_timer **rtimer); |
128 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp); |
129 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer); |
130 | int snd_timer_global_free(struct snd_timer *timer); |
131 | int snd_timer_global_register(struct snd_timer *timer); |
132 | |
133 | int snd_timer_open(struct snd_timer_instance **ti, char *owner, struct snd_timer_id *tid, unsigned int slave_id); |
134 | int snd_timer_close(struct snd_timer_instance *timeri); |
135 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri); |
136 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks); |
137 | int snd_timer_stop(struct snd_timer_instance *timeri); |
138 | int snd_timer_continue(struct snd_timer_instance *timeri); |
139 | int snd_timer_pause(struct snd_timer_instance *timeri); |
140 | |
141 | void snd_timer_interrupt(struct snd_timer *timer, unsigned long ticks_left); |
142 | |
143 | #endif /* __SOUND_TIMER_H */ |
144 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9