aboutsummaryrefslogtreecommitdiffstats
path: root/sound/oss/dev_table.c
blob: d8cf3e58dc76aa1017ef5b9424e862e95498ee6d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
 * sound/oss/dev_table.c
 *
 * Device call tables.
 *
 *
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
 * for more info.
 */

#include <linux/init.h>

#include "sound_config.h"

struct audio_operations *audio_devs[MAX_AUDIO_DEV];
EXPORT_SYMBOL(audio_devs);

int num_audiodevs;
EXPORT_SYMBOL(num_audiodevs);

struct mixer_operations *mixer_devs[MAX_MIXER_DEV];
EXPORT_SYMBOL(mixer_devs);

int num_mixers;
EXPORT_SYMBOL(num_mixers);

struct synth_operations *synth_devs[MAX_SYNTH_DEV+MAX_MIDI_DEV];
EXPORT_SYMBOL(synth_devs);

int num_synths;

struct midi_operations *midi_devs[MAX_MIDI_DEV];
EXPORT_SYMBOL(midi_devs);

int num_midis;
EXPORT_SYMBOL(num_midis);

struct sound_timer_operations *sound_timer_devs[MAX_TIMER_DEV] = {
	&default_sound_timer, NULL
};
EXPORT_SYMBOL(sound_timer_devs);

int num_sound_timers = 1;


static int sound_alloc_audiodev(void);

int sound_install_audiodrv(int vers, char *name, struct audio_driver *driver,
			int driver_size, int flags, unsigned int format_mask,
			void *devc, int dma1, int dma2)
{
	struct audio_driver *d;
	struct audio_operations *op;
	int num;

	if (vers != AUDIO_DRIVER_VERSION || driver_size > sizeof(struct audio_driver)) {
		printk(KERN_ERR "Sound: Incompatible audio driver for %s\n", name);
		return -(EINVAL);
	}
	num = sound_alloc_audiodev();

	if (num == -1) {
		printk(KERN_ERR "sound: Too many audio drivers\n");
		return -(EBUSY);
	}
	d = (struct audio_driver *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_driver)));
	sound_nblocks++;
	if (sound_nblocks >= MAX_MEM_BLOCKS)
		sound_nblocks = MAX_MEM_BLOCKS - 1;

	op = (struct audio_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct audio_operations)));
	sound_nblocks++;
	if (sound_nblocks >= MAX_MEM_BLOCKS)
		sound_nblocks = MAX_MEM_BLOCKS - 1;

	if (d == NULL || op == NULL) {
		printk(KERN_ERR "Sound: Can't allocate driver for (%s)\n", name);
		sound_unload_audiodev(num);
		return -(ENOMEM);
	}
	init_waitqueue_head(&op->in_sleeper);
	init_waitqueue_head(&op->out_sleeper);	
	init_waitqueue_head(&op->poll_sleeper);
	if (driver_size < sizeof(struct audio_driver))
		memset((char *) d, 0, sizeof(struct audio_driver));

	memcpy((char *) d, (char *) driver, driver_size);

	op->d = d;
	strlcpy(op->name, name, sizeof(op->name));
	op->flags = flags;
	op->format_mask = format_mask;
	op->devc = devc;

	/*
	 *    Hardcoded defaults
	 */
	audio_devs[num] = op;

	DMAbuf_init(num, dma1, dma2);

	audio_init_devices();
	return num;
}
EXPORT_SYMBOL(sound_install_audiodrv);

int sound_install_mixer(int vers, char *name, struct mixer_operations *driver,
	int driver_size, void *devc)
{
	struct mixer_operations *op;

	int n = sound_alloc_mixerdev();

	if (n == -1) {
		printk(KERN_ERR "Sound: Too many mixer drivers\n");
		return -EBUSY;
	}
	if (vers != MIXER_DRIVER_VERSION ||
		driver_size > sizeof(struct mixer_operations)) {
		printk(KERN_ERR "Sound: Incompatible mixer driver for %s\n", name);
		return -EINVAL;
	}
	
	/* FIXME: This leaks a mixer_operations struct every time its called
	   until you unload sound! */
	   
	op = (struct mixer_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct mixer_operations)));
	sound_nblocks++;
	if (sound_nblocks >= MAX_MEM_BLOCKS)
		sound_nblocks = MAX_MEM_BLOCKS - 1;

	if (op == NULL) {
		printk(KERN_ERR "Sound: Can't allocate mixer driver for (%s)\n", name);
		return -ENOMEM;
	}
	memcpy((char *) op, (char *) driver, driver_size);

	strlcpy(op->name, name, sizeof(op->name));
	op->devc = devc;

	mixer_devs[n] = op;
	return n;
}
EXPORT_SYMBOL(sound_install_mixer);

void sound_unload_audiodev(int dev)
{
	if (dev != -1) {
		DMAbuf_deinit(dev);
		audio_devs[dev] = NULL;
		unregister_sound_dsp((dev<<4)+3);
	}
}
EXPORT_SYMBOL(sound_unload_audiodev);

static int sound_alloc_audiodev(void)
{ 
	int i = register_sound_dsp(&oss_sound_fops, -1);
	if(i==-1)
		return i;
	i>>=4;
	if(i>=num_audiodevs)
		num_audiodevs = i + 1;
	return i;
}

int sound_alloc_mididev(void)
{
	int i = register_sound_midi(&oss_sound_fops, -1);
	if(i==-1)
		return i;
	i>>=4;
	if(i>=num_midis)
		num_midis = i + 1;
	return i;
}
EXPORT_SYMBOL(sound_alloc_mididev);

int sound_alloc_synthdev(void)
{
	int i;

	for (i = 0; i < MAX_SYNTH_DEV; i++) {
		if (synth_devs[i] == NULL) {
			if (i >= num_synths)
				num_synths++;
			return i;
		}
	}
	return -1;
}
EXPORT_SYMBOL(sound_alloc_synthdev);

int sound_alloc_mixerdev(void)
{
	int i = register_sound_mixer(&oss_sound_fops, -1);
	if(i==-1)
		return -1;
	i>>=4;
	if(i>=num_mixers)
		num_mixers = i + 1;
	return i;
}
EXPORT_SYMBOL(sound_alloc_mixerdev);

int sound_alloc_timerdev(void)
{
	int i;

	for (i = 0; i < MAX_TIMER_DEV; i++) {
		if (sound_timer_devs[i] == NULL) {
			if (i >= num_sound_timers)
				num_sound_timers++;
			return i;
		}
	}
	return -1;
}
EXPORT_SYMBOL(sound_alloc_timerdev);

void sound_unload_mixerdev(int dev)
{
	if (dev != -1) {
		mixer_devs[dev] = NULL;
		unregister_sound_mixer(dev<<4);
		num_mixers--;
	}
}
EXPORT_SYMBOL(sound_unload_mixerdev);

void sound_unload_mididev(int dev)
{
	if (dev != -1) {
		midi_devs[dev] = NULL;
		unregister_sound_midi((dev<<4)+2);
	}
}
EXPORT_SYMBOL(sound_unload_mididev);

void sound_unload_synthdev(int dev)
{
	if (dev != -1)
		synth_devs[dev] = NULL;
}
EXPORT_SYMBOL(sound_unload_synthdev);

void sound_unload_timerdev(int dev)
{
	if (dev != -1)
		sound_timer_devs[dev] = NULL;
}
EXPORT_SYMBOL(sound_unload_timerdev);