3  *  OSS emulation layer for the mixer interface
23 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
57 	fmixer->mixer = card->mixer_oss;  in snd_mixer_oss_open()
86 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_info()  local
90 	strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));  in snd_mixer_oss_info()
91 	strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));  in snd_mixer_oss_info()
102 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_info_obsolete()  local
106 	strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));  in snd_mixer_oss_info_obsolete()
107 	strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));  in snd_mixer_oss_info_obsolete()
115 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_caps()  local
118 	if (mixer == NULL)  in snd_mixer_oss_caps()
120 	if (mixer->get_recsrc && mixer->put_recsrc)  in snd_mixer_oss_caps()
127 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_devmask()  local
131 	if (mixer == NULL)  in snd_mixer_oss_devmask()
133 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_devmask()
135 		pslot = &mixer->slots[chn];  in snd_mixer_oss_devmask()
144 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_stereodevs()  local
148 	if (mixer == NULL)  in snd_mixer_oss_stereodevs()
150 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_stereodevs()
152 		pslot = &mixer->slots[chn];  in snd_mixer_oss_stereodevs()
161 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_recmask()  local
164 	if (mixer == NULL)  in snd_mixer_oss_recmask()
166 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_recmask()
167 	if (mixer->put_recsrc && mixer->get_recsrc) {	/* exclusive */  in snd_mixer_oss_recmask()
168 		result = mixer->mask_recsrc;  in snd_mixer_oss_recmask()
173 			pslot = &mixer->slots[chn];  in snd_mixer_oss_recmask()
183 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_get_recsrc()  local
186 	if (mixer == NULL)  in snd_mixer_oss_get_recsrc()
188 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_get_recsrc()
189 	if (mixer->put_recsrc && mixer->get_recsrc) {	/* exclusive */  in snd_mixer_oss_get_recsrc()
191 		result = mixer->get_recsrc(fmixer, &index);  in snd_mixer_oss_get_recsrc()
199 			pslot = &mixer->slots[chn];  in snd_mixer_oss_get_recsrc()
208 	mixer->oss_recsrc = result;  in snd_mixer_oss_get_recsrc()
214 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_set_recsrc()  local
220 	if (mixer == NULL)  in snd_mixer_oss_set_recsrc()
222 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_set_recsrc()
223 	if (mixer->get_recsrc && mixer->put_recsrc) {	/* exclusive input */  in snd_mixer_oss_set_recsrc()
224 		if (recsrc & ~mixer->oss_recsrc)  in snd_mixer_oss_set_recsrc()
225 			recsrc &= ~mixer->oss_recsrc;  in snd_mixer_oss_set_recsrc()
226 		mixer->put_recsrc(fmixer, ffz(~recsrc));  in snd_mixer_oss_set_recsrc()
227 		mixer->get_recsrc(fmixer, &index);  in snd_mixer_oss_set_recsrc()
231 		pslot = &mixer->slots[chn];  in snd_mixer_oss_set_recsrc()
239 			pslot = &mixer->slots[chn];  in snd_mixer_oss_set_recsrc()
253 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_get_volume()  local
257 	if (mixer == NULL || slot > 30)  in snd_mixer_oss_get_volume()
259 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_get_volume()
260 	pslot = &mixer->slots[slot];  in snd_mixer_oss_get_volume()
282 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_set_volume()  local
286 	if (mixer == NULL || slot > 30)  in snd_mixer_oss_set_volume()
288 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_set_volume()
289 	pslot = &mixer->slots[slot];  in snd_mixer_oss_set_volume()
389 	fmixer.mixer = card->mixer_oss;  in snd_mixer_oss_ioctl_card()
449 	struct snd_mixer_oss *mixer = card->mixer_oss;
450 	if (mixer)
451 		mixer->mask_recsrc |= 1 << slot;
456 	struct snd_mixer_oss *mixer = card->mixer_oss;
457 	if (mixer && (mixer->mask_recsrc & (1 << slot)))
503 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, in…  in snd_mixer_oss_test_id()  argument
505 	struct snd_card *card = mixer->card;  in snd_mixer_oss_test_id()
782 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_get_recsrc2()  local
795 	kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);  in snd_mixer_oss_get_recsrc2()
805 		if (!(mixer->mask_recsrc & (1 << idx)))  in snd_mixer_oss_get_recsrc2()
807 		pslot = &mixer->slots[idx];  in snd_mixer_oss_get_recsrc2()
824 	struct snd_mixer_oss *mixer = fmixer->mixer;  in snd_mixer_oss_put_recsrc2()  local
838 	kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);  in snd_mixer_oss_put_recsrc2()
845 		if (!(mixer->mask_recsrc & (1 << idx)))  in snd_mixer_oss_put_recsrc2()
847 		pslot = &mixer->slots[idx];  in snd_mixer_oss_put_recsrc2()
873 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *nam…  in snd_mixer_oss_build_test()  argument
877 	struct snd_card *card = mixer->card;  in snd_mixer_oss_build_test()
881 		kcontrol = snd_mixer_oss_test_id(mixer, name, index);  in snd_mixer_oss_build_test()
921 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,  in snd_mixer_oss_build_test_all()  argument
928 	err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,  in snd_mixer_oss_build_test_all()
933 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
938 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
943 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
948 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
953 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
958 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
963 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
968 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
973 	err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,  in snd_mixer_oss_build_test_all()
982  * build an OSS mixer element.
986 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,  in snd_mixer_oss_build_input()  argument
997 	if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)  in snd_mixer_oss_build_input()
1002 	if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))  in snd_mixer_oss_build_input()
1004 	guard(rwsem_read)(&mixer->card->controls_rwsem);  in snd_mixer_oss_build_input()
1007 		kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);  in snd_mixer_oss_build_input()
1045 		rslot = &mixer->slots[ptr->oss_id];  in snd_mixer_oss_build_input()
1058 			mixer->mask_recsrc |= 1 << ptr->oss_id;  in snd_mixer_oss_build_input()
1106 	struct snd_mixer_oss *mixer = entry->private_data;  in snd_mixer_oss_proc_read()  local
1109 	guard(mutex)(&mixer->reg_mutex);  in snd_mixer_oss_proc_read()
1115 		p = (struct slot *)mixer->slots[i].private_data;  in snd_mixer_oss_proc_read()
1129 	struct snd_mixer_oss *mixer = entry->private_data;  in snd_mixer_oss_proc_write()  local
1150 			scoped_guard(mutex, &mixer->reg_mutex)  in snd_mixer_oss_proc_write()
1151 				mixer_slot_clear(&mixer->slots[ch]);  in snd_mixer_oss_proc_write()
1160 		scoped_guard(mutex, &mixer->reg_mutex) {  in snd_mixer_oss_proc_write()
1161 			slot = (struct slot *)mixer->slots[ch].private_data;  in snd_mixer_oss_proc_write()
1176 			if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {  in snd_mixer_oss_proc_write()
1184 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)  in snd_mixer_oss_proc_init()  argument
1188 	entry = snd_info_create_card_entry(mixer->card, "oss_mixer",  in snd_mixer_oss_proc_init()
1189 					   mixer->card->proc_root);  in snd_mixer_oss_proc_init()
1196 	entry->private_data = mixer;  in snd_mixer_oss_proc_init()
1201 	mixer->proc_entry = entry;  in snd_mixer_oss_proc_init()
1204 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)  in snd_mixer_oss_proc_done()  argument
1206 	snd_info_free_entry(mixer->proc_entry);  in snd_mixer_oss_proc_done()
1207 	mixer->proc_entry = NULL;  in snd_mixer_oss_proc_done()
1214 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)  in snd_mixer_oss_build()  argument
1259 		snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);  in snd_mixer_oss_build()
1260 	if (mixer->mask_recsrc) {  in snd_mixer_oss_build()
1261 		mixer->get_recsrc = snd_mixer_oss_get_recsrc2;  in snd_mixer_oss_build()
1262 		mixer->put_recsrc = snd_mixer_oss_put_recsrc2;  in snd_mixer_oss_build()
1272 	struct snd_mixer_oss *mixer = private;  in snd_mixer_oss_free1()  local
1276 	if (!mixer)  in snd_mixer_oss_free1()
1278 	card = mixer->card;  in snd_mixer_oss_free1()
1279 	if (snd_BUG_ON(mixer != card->mixer_oss))  in snd_mixer_oss_free1()
1283 		struct snd_mixer_oss_slot *chn = &mixer->slots[idx];  in snd_mixer_oss_free1()
1287 	kfree(mixer);  in snd_mixer_oss_free1()
1293 	struct snd_mixer_oss *mixer;  in snd_mixer_oss_notify_handler()  local
1298 		mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);  in snd_mixer_oss_notify_handler()
1299 		if (mixer == NULL)  in snd_mixer_oss_notify_handler()
1301 		mutex_init(&mixer->reg_mutex);  in snd_mixer_oss_notify_handler()
1307 				"unable to register OSS mixer device %i:%i\n",  in snd_mixer_oss_notify_handler()
1309 			kfree(mixer);  in snd_mixer_oss_notify_handler()
1312 		mixer->oss_dev_alloc = 1;  in snd_mixer_oss_notify_handler()
1313 		mixer->card = card;  in snd_mixer_oss_notify_handler()
1315 			strscpy(mixer->name, card->mixername, sizeof(mixer->name));  in snd_mixer_oss_notify_handler()
1317 			snprintf(mixer->name, sizeof(mixer->name),  in snd_mixer_oss_notify_handler()
1318 				 "mixer%i", card->number);  in snd_mixer_oss_notify_handler()
1322 				      mixer->name);  in snd_mixer_oss_notify_handler()
1325 			mixer->slots[idx].number = idx;  in snd_mixer_oss_notify_handler()
1326 		card->mixer_oss = mixer;  in snd_mixer_oss_notify_handler()
1327 		snd_mixer_oss_build(mixer);  in snd_mixer_oss_notify_handler()
1328 		snd_mixer_oss_proc_init(mixer);  in snd_mixer_oss_notify_handler()
1330 		mixer = card->mixer_oss;  in snd_mixer_oss_notify_handler()
1331 		if (mixer == NULL)  in snd_mixer_oss_notify_handler()
1333 		if (mixer->oss_dev_alloc) {  in snd_mixer_oss_notify_handler()
1335 			snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);  in snd_mixer_oss_notify_handler()
1337 			snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);  in snd_mixer_oss_notify_handler()
1338 			mixer->oss_dev_alloc = 0;  in snd_mixer_oss_notify_handler()
1342 		snd_mixer_oss_proc_done(mixer);  in snd_mixer_oss_notify_handler()
1343 		return snd_mixer_oss_free1(mixer);  in snd_mixer_oss_notify_handler()