diff options
Diffstat (limited to 'sound/oss/dev_table.c')
| -rw-r--r-- | sound/oss/dev_table.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/sound/oss/dev_table.c b/sound/oss/dev_table.c new file mode 100644 index 000000000000..f65a90469d8a --- /dev/null +++ b/sound/oss/dev_table.c @@ -0,0 +1,214 @@ +/* + * 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; +} |