sound/oss/dev_table.c: Use vzalloc
[linux-2.6.git] / sound / oss / dev_table.c
1 /*
2  * sound/oss/dev_table.c
3  *
4  * Device call tables.
5  *
6  *
7  * Copyright (C) by Hannu Savolainen 1993-1997
8  *
9  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10  * Version 2 (June 1991). See the "COPYING" file distributed with this software
11  * for more info.
12  */
13
14 #include <linux/init.h>
15
16 #include "sound_config.h"
17
18 struct audio_operations *audio_devs[MAX_AUDIO_DEV];
19 EXPORT_SYMBOL(audio_devs);
20
21 int num_audiodevs;
22 EXPORT_SYMBOL(num_audiodevs);
23
24 struct mixer_operations *mixer_devs[MAX_MIXER_DEV];
25 EXPORT_SYMBOL(mixer_devs);
26
27 int num_mixers;
28 EXPORT_SYMBOL(num_mixers);
29
30 struct synth_operations *synth_devs[MAX_SYNTH_DEV+MAX_MIDI_DEV];
31 EXPORT_SYMBOL(synth_devs);
32
33 int num_synths;
34
35 struct midi_operations *midi_devs[MAX_MIDI_DEV];
36 EXPORT_SYMBOL(midi_devs);
37
38 int num_midis;
39 EXPORT_SYMBOL(num_midis);
40
41 struct sound_timer_operations *sound_timer_devs[MAX_TIMER_DEV] = {
42         &default_sound_timer, NULL
43 };
44 EXPORT_SYMBOL(sound_timer_devs);
45
46 int num_sound_timers = 1;
47
48
49 static int sound_alloc_audiodev(void);
50
51 int sound_install_audiodrv(int vers, char *name, struct audio_driver *driver,
52                         int driver_size, int flags, unsigned int format_mask,
53                         void *devc, int dma1, int dma2)
54 {
55         struct audio_driver *d;
56         struct audio_operations *op;
57         int num;
58
59         if (vers != AUDIO_DRIVER_VERSION || driver_size > sizeof(struct audio_driver)) {
60                 printk(KERN_ERR "Sound: Incompatible audio driver for %s\n", name);
61                 return -(EINVAL);
62         }
63         num = sound_alloc_audiodev();
64
65         if (num == -1) {
66                 printk(KERN_ERR "sound: Too many audio drivers\n");
67                 return -(EBUSY);
68         }
69         d = (struct audio_driver *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_driver)));
70         sound_nblocks++;
71         if (sound_nblocks >= MAX_MEM_BLOCKS)
72                 sound_nblocks = MAX_MEM_BLOCKS - 1;
73
74         op = (struct audio_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct audio_operations)));
75         sound_nblocks++;
76         if (sound_nblocks >= MAX_MEM_BLOCKS)
77                 sound_nblocks = MAX_MEM_BLOCKS - 1;
78
79         if (d == NULL || op == NULL) {
80                 printk(KERN_ERR "Sound: Can't allocate driver for (%s)\n", name);
81                 sound_unload_audiodev(num);
82                 return -(ENOMEM);
83         }
84         init_waitqueue_head(&op->in_sleeper);
85         init_waitqueue_head(&op->out_sleeper);  
86         init_waitqueue_head(&op->poll_sleeper);
87         if (driver_size < sizeof(struct audio_driver))
88                 memset((char *) d, 0, sizeof(struct audio_driver));
89
90         memcpy((char *) d, (char *) driver, driver_size);
91
92         op->d = d;
93         strlcpy(op->name, name, sizeof(op->name));
94         op->flags = flags;
95         op->format_mask = format_mask;
96         op->devc = devc;
97
98         /*
99          *    Hardcoded defaults
100          */
101         audio_devs[num] = op;
102
103         DMAbuf_init(num, dma1, dma2);
104
105         audio_init_devices();
106         return num;
107 }
108 EXPORT_SYMBOL(sound_install_audiodrv);
109
110 int sound_install_mixer(int vers, char *name, struct mixer_operations *driver,
111         int driver_size, void *devc)
112 {
113         struct mixer_operations *op;
114
115         int n = sound_alloc_mixerdev();
116
117         if (n == -1) {
118                 printk(KERN_ERR "Sound: Too many mixer drivers\n");
119                 return -EBUSY;
120         }
121         if (vers != MIXER_DRIVER_VERSION ||
122                 driver_size > sizeof(struct mixer_operations)) {
123                 printk(KERN_ERR "Sound: Incompatible mixer driver for %s\n", name);
124                 return -EINVAL;
125         }
126         
127         /* FIXME: This leaks a mixer_operations struct every time its called
128            until you unload sound! */
129            
130         op = (struct mixer_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct mixer_operations)));
131         sound_nblocks++;
132         if (sound_nblocks >= MAX_MEM_BLOCKS)
133                 sound_nblocks = MAX_MEM_BLOCKS - 1;
134
135         if (op == NULL) {
136                 printk(KERN_ERR "Sound: Can't allocate mixer driver for (%s)\n", name);
137                 return -ENOMEM;
138         }
139         memcpy((char *) op, (char *) driver, driver_size);
140
141         strlcpy(op->name, name, sizeof(op->name));
142         op->devc = devc;
143
144         mixer_devs[n] = op;
145         return n;
146 }
147 EXPORT_SYMBOL(sound_install_mixer);
148
149 void sound_unload_audiodev(int dev)
150 {
151         if (dev != -1) {
152                 DMAbuf_deinit(dev);
153                 audio_devs[dev] = NULL;
154                 unregister_sound_dsp((dev<<4)+3);
155         }
156 }
157 EXPORT_SYMBOL(sound_unload_audiodev);
158
159 static int sound_alloc_audiodev(void)
160
161         int i = register_sound_dsp(&oss_sound_fops, -1);
162         if(i==-1)
163                 return i;
164         i>>=4;
165         if(i>=num_audiodevs)
166                 num_audiodevs = i + 1;
167         return i;
168 }
169
170 int sound_alloc_mididev(void)
171 {
172         int i = register_sound_midi(&oss_sound_fops, -1);
173         if(i==-1)
174                 return i;
175         i>>=4;
176         if(i>=num_midis)
177                 num_midis = i + 1;
178         return i;
179 }
180 EXPORT_SYMBOL(sound_alloc_mididev);
181
182 int sound_alloc_synthdev(void)
183 {
184         int i;
185
186         for (i = 0; i < MAX_SYNTH_DEV; i++) {
187                 if (synth_devs[i] == NULL) {
188                         if (i >= num_synths)
189                                 num_synths++;
190                         return i;
191                 }
192         }
193         return -1;
194 }
195 EXPORT_SYMBOL(sound_alloc_synthdev);
196
197 int sound_alloc_mixerdev(void)
198 {
199         int i = register_sound_mixer(&oss_sound_fops, -1);
200         if(i==-1)
201                 return -1;
202         i>>=4;
203         if(i>=num_mixers)
204                 num_mixers = i + 1;
205         return i;
206 }
207 EXPORT_SYMBOL(sound_alloc_mixerdev);
208
209 int sound_alloc_timerdev(void)
210 {
211         int i;
212
213         for (i = 0; i < MAX_TIMER_DEV; i++) {
214                 if (sound_timer_devs[i] == NULL) {
215                         if (i >= num_sound_timers)
216                                 num_sound_timers++;
217                         return i;
218                 }
219         }
220         return -1;
221 }
222 EXPORT_SYMBOL(sound_alloc_timerdev);
223
224 void sound_unload_mixerdev(int dev)
225 {
226         if (dev != -1) {
227                 mixer_devs[dev] = NULL;
228                 unregister_sound_mixer(dev<<4);
229                 num_mixers--;
230         }
231 }
232 EXPORT_SYMBOL(sound_unload_mixerdev);
233
234 void sound_unload_mididev(int dev)
235 {
236         if (dev != -1) {
237                 midi_devs[dev] = NULL;
238                 unregister_sound_midi((dev<<4)+2);
239         }
240 }
241 EXPORT_SYMBOL(sound_unload_mididev);
242
243 void sound_unload_synthdev(int dev)
244 {
245         if (dev != -1)
246                 synth_devs[dev] = NULL;
247 }
248 EXPORT_SYMBOL(sound_unload_synthdev);
249
250 void sound_unload_timerdev(int dev)
251 {
252         if (dev != -1)
253                 sound_timer_devs[dev] = NULL;
254 }
255 EXPORT_SYMBOL(sound_unload_timerdev);
256