7 * Copyright (C) by Hannu Savolainen 1993-1997
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
14 #include <linux/init.h>
17 #include "sound_config.h"
19 static int sound_alloc_audiodev(void);
21 int sound_install_audiodrv(int vers, char *name, struct audio_driver *driver,
22 int driver_size, int flags, unsigned int format_mask,
23 void *devc, int dma1, int dma2)
25 struct audio_driver *d;
26 struct audio_operations *op;
29 if (vers != AUDIO_DRIVER_VERSION || driver_size > sizeof(struct audio_driver)) {
30 printk(KERN_ERR "Sound: Incompatible audio driver for %s\n", name);
33 num = sound_alloc_audiodev();
36 printk(KERN_ERR "sound: Too many audio drivers\n");
39 d = (struct audio_driver *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_driver)));
41 if (sound_nblocks < 1024)
44 op = (struct audio_operations *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_operations)));
46 if (sound_nblocks < 1024)
48 if (d == NULL || op == NULL) {
49 printk(KERN_ERR "Sound: Can't allocate driver for (%s)\n", name);
50 sound_unload_audiodev(num);
53 memset((char *) op, 0, sizeof(struct audio_operations));
54 init_waitqueue_head(&op->in_sleeper);
55 init_waitqueue_head(&op->out_sleeper);
56 init_waitqueue_head(&op->poll_sleeper);
57 if (driver_size < sizeof(struct audio_driver))
58 memset((char *) d, 0, sizeof(struct audio_driver));
60 memcpy((char *) d, (char *) driver, driver_size);
63 strlcpy(op->name, name, sizeof(op->name));
65 op->format_mask = format_mask;
73 DMAbuf_init(num, dma1, dma2);
79 int sound_install_mixer(int vers, char *name, struct mixer_operations *driver,
80 int driver_size, void *devc)
82 struct mixer_operations *op;
84 int n = sound_alloc_mixerdev();
87 printk(KERN_ERR "Sound: Too many mixer drivers\n");
90 if (vers != MIXER_DRIVER_VERSION ||
91 driver_size > sizeof(struct mixer_operations)) {
92 printk(KERN_ERR "Sound: Incompatible mixer driver for %s\n", name);
96 /* FIXME: This leaks a mixer_operations struct every time its called
97 until you unload sound! */
99 op = (struct mixer_operations *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct mixer_operations)));
101 if (sound_nblocks < 1024)
104 printk(KERN_ERR "Sound: Can't allocate mixer driver for (%s)\n", name);
107 memset((char *) op, 0, sizeof(struct mixer_operations));
108 memcpy((char *) op, (char *) driver, driver_size);
110 strlcpy(op->name, name, sizeof(op->name));
117 void sound_unload_audiodev(int dev)
121 audio_devs[dev] = NULL;
122 unregister_sound_dsp((dev<<4)+3);
126 static int sound_alloc_audiodev(void)
128 int i = register_sound_dsp(&oss_sound_fops, -1);
133 num_audiodevs = i + 1;
137 int sound_alloc_mididev(void)
139 int i = register_sound_midi(&oss_sound_fops, -1);
148 int sound_alloc_synthdev(void)
152 for (i = 0; i < MAX_SYNTH_DEV; i++) {
153 if (synth_devs[i] == NULL) {
162 int sound_alloc_mixerdev(void)
164 int i = register_sound_mixer(&oss_sound_fops, -1);
173 int sound_alloc_timerdev(void)
177 for (i = 0; i < MAX_TIMER_DEV; i++) {
178 if (sound_timer_devs[i] == NULL) {
179 if (i >= num_sound_timers)
187 void sound_unload_mixerdev(int dev)
190 mixer_devs[dev] = NULL;
191 unregister_sound_mixer(dev<<4);
196 void sound_unload_mididev(int dev)
199 midi_devs[dev] = NULL;
200 unregister_sound_midi((dev<<4)+2);
204 void sound_unload_synthdev(int dev)
207 synth_devs[dev] = NULL;
210 void sound_unload_timerdev(int dev)
213 sound_timer_devs[dev] = NULL;