Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/include/sound/timer.h
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 6399 byte(s)
Tag kernel26-2.6.12-alx-r9
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 | |
29 | typedef enum sndrv_timer_class snd_timer_class_t; |
30 | typedef enum sndrv_timer_slave_class snd_timer_slave_class_t; |
31 | typedef enum sndrv_timer_global snd_timer_global_t; |
32 | typedef struct sndrv_timer_id snd_timer_id_t; |
33 | typedef struct sndrv_timer_ginfo snd_timer_ginfo_t; |
34 | typedef struct sndrv_timer_gparams snd_timer_gparams_t; |
35 | typedef struct sndrv_timer_gstatus snd_timer_gstatus_t; |
36 | typedef struct sndrv_timer_select snd_timer_select_t; |
37 | typedef struct sndrv_timer_info snd_timer_info_t; |
38 | typedef struct sndrv_timer_params snd_timer_params_t; |
39 | typedef struct sndrv_timer_status snd_timer_status_t; |
40 | typedef struct sndrv_timer_read snd_timer_read_t; |
41 | typedef 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 | |
67 | typedef void (*snd_timer_callback_t) (snd_timer_instance_t * timeri, unsigned long ticks, unsigned long resolution); |
68 | typedef void (*snd_timer_ccallback_t) (snd_timer_instance_t * timeri, enum sndrv_timer_event event, |
69 | struct timespec * tstamp, unsigned long resolution); |
70 | |
71 | struct _snd_timer_hardware { |
72 | /* -- must be filled with low-level driver */ |
73 | unsigned int flags; /* various flags */ |
74 | unsigned long resolution; /* average timer resolution for one tick in nsec */ |
75 | unsigned long resolution_min; /* minimal resolution */ |
76 | unsigned long resolution_max; /* maximal resolution */ |
77 | unsigned long ticks; /* max timer ticks per interrupt */ |
78 | /* -- low-level functions -- */ |
79 | int (*open) (snd_timer_t * timer); |
80 | int (*close) (snd_timer_t * timer); |
81 | unsigned long (*c_resolution) (snd_timer_t * timer); |
82 | int (*start) (snd_timer_t * timer); |
83 | int (*stop) (snd_timer_t * timer); |
84 | int (*set_period) (snd_timer_t * timer, unsigned long period_num, unsigned long period_den); |
85 | int (*precise_resolution) (snd_timer_t * timer, unsigned long *num, unsigned long *den); |
86 | }; |
87 | |
88 | struct _snd_timer { |
89 | snd_timer_class_t tmr_class; |
90 | snd_card_t *card; |
91 | int tmr_device; |
92 | int tmr_subdevice; |
93 | char id[64]; |
94 | char name[80]; |
95 | unsigned int flags; |
96 | int running; /* running instances */ |
97 | unsigned long sticks; /* schedule ticks */ |
98 | void *private_data; |
99 | void (*private_free) (snd_timer_t *timer); |
100 | struct _snd_timer_hardware hw; |
101 | spinlock_t lock; |
102 | struct list_head device_list; |
103 | struct list_head open_list_head; |
104 | struct list_head active_list_head; |
105 | struct list_head ack_list_head; |
106 | struct list_head sack_list_head; /* slow ack list head */ |
107 | struct tasklet_struct task_queue; |
108 | }; |
109 | |
110 | struct _snd_timer_instance { |
111 | snd_timer_t * timer; |
112 | char *owner; |
113 | unsigned int flags; |
114 | void *private_data; |
115 | void (*private_free) (snd_timer_instance_t *ti); |
116 | snd_timer_callback_t callback; |
117 | snd_timer_ccallback_t ccallback; |
118 | void *callback_data; |
119 | unsigned long ticks; /* auto-load ticks when expired */ |
120 | unsigned long cticks; /* current ticks */ |
121 | unsigned long pticks; /* accumulated ticks for callback */ |
122 | unsigned long resolution; /* current resolution for tasklet */ |
123 | unsigned long lost; /* lost ticks */ |
124 | snd_timer_slave_class_t slave_class; |
125 | unsigned int slave_id; |
126 | struct list_head open_list; |
127 | struct list_head active_list; |
128 | struct list_head ack_list; |
129 | struct list_head slave_list_head; |
130 | struct list_head slave_active_head; |
131 | snd_timer_instance_t *master; |
132 | }; |
133 | |
134 | /* |
135 | * Registering |
136 | */ |
137 | |
138 | extern int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, snd_timer_t ** rtimer); |
139 | extern void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct timespec *tstamp); |
140 | extern int snd_timer_global_new(char *id, int device, snd_timer_t **rtimer); |
141 | extern int snd_timer_global_free(snd_timer_t *timer); |
142 | extern int snd_timer_global_register(snd_timer_t *timer); |
143 | extern int snd_timer_global_unregister(snd_timer_t *timer); |
144 | |
145 | extern int snd_timer_open(snd_timer_instance_t ** ti, char *owner, snd_timer_id_t *tid, unsigned int slave_id); |
146 | extern int snd_timer_close(snd_timer_instance_t * timeri); |
147 | extern unsigned long snd_timer_resolution(snd_timer_instance_t * timeri); |
148 | extern int snd_timer_start(snd_timer_instance_t * timeri, unsigned int ticks); |
149 | extern int snd_timer_stop(snd_timer_instance_t * timeri); |
150 | extern int snd_timer_continue(snd_timer_instance_t * timeri); |
151 | extern int snd_timer_pause(snd_timer_instance_t * timeri); |
152 | |
153 | extern void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left); |
154 | |
155 | extern unsigned int snd_timer_system_resolution(void); |
156 | |
157 | #endif /* __SOUND_TIMER_H */ |