1 // SPDX-License-Identifier: GPL-2.0-or-later
32 	if (MAJOR(dev->devt) == SOUND_MAJOR)  in sound_devnode()
78  *                         --------------------
95  *	of this using fine grained locking.
97  *	FIXME: we have to resolve modules and fine grained load/unload
119  * By default, OSS sound_core claims full legacy minor range (0-255)
121  * requests modules using custom sound-slot/service-* module aliases.
123  * aliases instead of the standard char-major-* ones.  This behavior
130  * the kernel in the meantime.  If preclaim_oss is non-zero, the
138  * sound-slot/service-* module aliases.
165 		while (*list && (*list)->unit_minor<n)  in __sound_insert_unit()
166 			list=&((*list)->next);  in __sound_insert_unit()
171 			if(*list==NULL || (*list)->unit_minor>n)  in __sound_insert_unit()
173 			list=&((*list)->next);  in __sound_insert_unit()
178 			return -ENOENT;  in __sound_insert_unit()
182 			if ((*list)->unit_minor==n)  in __sound_insert_unit()
183 				return -EBUSY;  in __sound_insert_unit()
184 			if ((*list)->unit_minor>n)  in __sound_insert_unit()
186 			list=&((*list)->next);  in __sound_insert_unit()
194 	s->unit_minor=n;  in __sound_insert_unit()
195 	s->unit_fops=fops;  in __sound_insert_unit()
201 	s->next=*list;  in __sound_insert_unit()
217 		if(p->unit_minor==unit)  in __sound_remove_unit()
219 			*list=p->next;  in __sound_remove_unit()
222 		list=&(p->next);  in __sound_remove_unit()
245 		return -ENOMEM;  in sound_insert_unit()
255 		sprintf(s->name, "sound/%s", name);  in sound_insert_unit()
257 		sprintf(s->name, "sound/%s%d", name, r / SOUND_STEP);  in sound_insert_unit()
263 		 * to the next unit; otherwise, -EBUSY.  in sound_insert_unit()
265 		r = __register_chrdev(SOUND_MAJOR, s->unit_minor, 1, s->name,  in sound_insert_unit()
269 			__sound_remove_unit(list, s->unit_minor);  in sound_insert_unit()
271 				low = s->unit_minor + SOUND_STEP;  in sound_insert_unit()
275 			r = -EBUSY;  in sound_insert_unit()
280 	device_create(&sound_class, dev, MKDEV(SOUND_MAJOR, s->unit_minor),  in sound_insert_unit()
281 		      NULL, "%s", s->name+6);  in sound_insert_unit()
282 	return s->unit_minor;  in sound_insert_unit()
304 			__unregister_chrdev(SOUND_MAJOR, p->unit_minor, 1,  in sound_remove_unit()
305 					    p->name);  in sound_remove_unit()
306 		device_destroy(&sound_class, MKDEV(SOUND_MAJOR, p->unit_minor));  in sound_remove_unit()
320  *	6	--		sndstat (obsolete)
322  *	8	--		alternate sequencer (see above)
335  *	register_sound_special_device - register a special sound node
403 		    		strcat(_name, "-");  in register_sound_special_device()
408 	return sound_insert_unit(&chains[chain], fops, -1, unit, max_unit,  in register_sound_special_device()
422  *	register_sound_mixer - register a mixer device
427  *	Pass -1 to request the next free mixer unit.
443  *	in open - see below.
447  *	register_sound_dsp - register a DSP device
452  *	Pass -1 to request the next free DSP unit.
455  *	and will always allocate them as a matching pair - eg dsp3/audio3
470  *	unregister_sound_special - unregister a special sound device
487  *	unregister_sound_mixer - unregister a mixer
502  *	unregister_sound_dsp - unregister a DSP device
524 	while(s && s->unit_minor <= unit)  in __look_for_unit()
526 		if(s->unit_minor==unit)  in __look_for_unit()
528 		s=s->next;  in __look_for_unit()
551 		new_fops = fops_get(s->unit_fops);  in soundcore_open()
558 		 *  comes as add-on modules which aren't depend on  in soundcore_open()
562 		request_module("sound-slot-%i", unit>>4);  in soundcore_open()
563 		request_module("sound-service-%i-%i", unit>>4, chain);  in soundcore_open()
566 		 * sound-slot/service-* module aliases are scheduled  in soundcore_open()
567 		 * for removal in favor of the standard char-major-*  in soundcore_open()
572 		if (request_module("char-major-%d-%d", SOUND_MAJOR, unit) > 0)  in soundcore_open()
573 			request_module("char-major-%d", SOUND_MAJOR);  in soundcore_open()
578 			new_fops = fops_get(s->unit_fops);  in soundcore_open()
583 		return -ENODEV;  in soundcore_open()
591 	if (!file->f_op->open)  in soundcore_open()
592 		return -ENODEV;  in soundcore_open()
594 	return file->f_op->open(inode, file);  in soundcore_open()
601 	/* We have nothing to really do here - we know the lists must be  in cleanup_oss_soundcore()
611 		return -EBUSY;  in init_oss_soundcore()