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/*
* sound/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>
#define _DEV_TABLE_C_
#include "sound_config.h"
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)));
if (sound_nblocks < 1024)
sound_nblocks++;
op = (struct audio_operations *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_operations)));
if (sound_nblocks < 1024)
sound_nblocks++;
if (d == NULL || op == NULL) {
printk(KERN_ERR "Sound: Can't allocate driver for (%s)\n", name);
sound_unload_audiodev(num);
return -(ENOMEM);
}
memset((char *) op, 0, sizeof(struct audio_operations));
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;
}
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] = vmalloc(sizeof(struct mixer_operations)));
if (sound_nblocks < 1024)
sound_nblocks++;
if (op == NULL) {
printk(KERN_ERR "Sound: Can't allocate mixer driver for (%s)\n", name);
return -ENOMEM;
}
memset((char *) op, 0, sizeof(struct mixer_operations));
memcpy((char *) op, (char *) driver, driver_size);
strlcpy(op->name, name, sizeof(op->name));
op->devc = devc;
mixer_devs[n] = op;
return n;
}
void sound_unload_audiodev(int dev)
{
if (dev != -1) {
DMAbuf_deinit(dev);
audio_devs[dev] = NULL;
unregister_sound_dsp((dev<<4)+3);
}
}
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;
}
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;
}
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;
}
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;
}
void sound_unload_mixerdev(int dev)
{
if (dev != -1) {
mixer_devs[dev] = NULL;
unregister_sound_mixer(dev<<4);
num_mixers--;
}
}
void sound_unload_mididev(int dev)
{
if (dev != -1) {
midi_devs[dev] = NULL;
unregister_sound_midi((dev<<4)+2);
}
}
void sound_unload_synthdev(int dev)
{
if (dev != -1)
synth_devs[dev] = NULL;
}
void sound_unload_timerdev(int dev)
{
if (dev != -1)
sound_timer_devs[dev] = NULL;
}
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