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sound/oss/dev_table.c
5.43 KB
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/* |
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* sound/oss/dev_table.c |
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* * 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> |
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#include "sound_config.h" |
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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; |
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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 ", name); return -(EINVAL); } num = sound_alloc_audiodev(); if (num == -1) { printk(KERN_ERR "sound: Too many audio drivers "); 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) ", 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; } |
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EXPORT_SYMBOL(sound_install_audiodrv); |
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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 "); return -EBUSY; } if (vers != MIXER_DRIVER_VERSION || driver_size > sizeof(struct mixer_operations)) { printk(KERN_ERR "Sound: Incompatible mixer driver for %s ", 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) ", 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; } |
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EXPORT_SYMBOL(sound_install_mixer); |
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void sound_unload_audiodev(int dev) { if (dev != -1) { DMAbuf_deinit(dev); audio_devs[dev] = NULL; unregister_sound_dsp((dev<<4)+3); } } |
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EXPORT_SYMBOL(sound_unload_audiodev); |
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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; } |
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EXPORT_SYMBOL(sound_alloc_mididev); |
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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; } |
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EXPORT_SYMBOL(sound_alloc_synthdev); |
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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; } |
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EXPORT_SYMBOL(sound_alloc_mixerdev); |
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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; } |
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EXPORT_SYMBOL(sound_alloc_timerdev); |
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void sound_unload_mixerdev(int dev) { if (dev != -1) { mixer_devs[dev] = NULL; unregister_sound_mixer(dev<<4); num_mixers--; } } |
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EXPORT_SYMBOL(sound_unload_mixerdev); |
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void sound_unload_mididev(int dev) { if (dev != -1) { midi_devs[dev] = NULL; unregister_sound_midi((dev<<4)+2); } } |
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EXPORT_SYMBOL(sound_unload_mididev); |
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void sound_unload_synthdev(int dev) { if (dev != -1) synth_devs[dev] = NULL; } |
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EXPORT_SYMBOL(sound_unload_synthdev); |
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void sound_unload_timerdev(int dev) { if (dev != -1) sound_timer_devs[dev] = NULL; } |
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EXPORT_SYMBOL(sound_unload_timerdev); |