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
257
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