xref: /haiku/src/add-ons/kernel/drivers/audio/echo/multi.cpp (revision dd2a1e350b303b855a50fd64e6cb55618be1ae6a)
1 /*
2  * EchoGals/Echo24 BeOS Driver for Echo audio cards
3  *
4  * Copyright (c) 2003, Jerome Duval (jerome.duval@free.fr)
5  *
6  * Original code : BeOS Driver for Intel ICH AC'97 Link interface
7  * Copyright (c) 2002, Marcus Overhagen <marcus@overhagen.de>
8  *
9  * All rights reserved.
10  * Redistribution and use in source and binary forms, with or without modification,
11  * are permitted provided that the following conditions are met:
12  *
13  * - Redistributions of source code must retain the above copyright notice,
14  *   this list of conditions and the following disclaimer.
15  * - Redistributions in binary form must reproduce the above copyright notice,
16  *   this list of conditions and the following disclaimer in the documentation
17  *   and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  */
31 
32 #include <driver_settings.h>
33 #include <OS.h>
34 #include <MediaDefs.h>
35 #include "debug.h"
36 #include "hmulti_audio.h"
37 #include "multi.h"
38 
39 //#define DEBUG 1
40 
41 #include "echo.h"
42 #include "util.h"
43 
44 typedef enum {
45 	B_MIX_GAIN = 1 << 0,
46 	B_MIX_MUTE = 1 << 1,
47 	B_MIX_NOMINAL = 1 << 2
48 } mixer_type;
49 
50 typedef struct {
51 	uint8	channels;
52 	uint8	bitsPerSample;
53 	uint32	sample_rate;
54 	uint32	buffer_frames;
55 	int32	buffer_count;
56 } echo_settings;
57 
58 echo_settings current_settings = {
59 	2,	// channels
60 	16,	// bits per sample
61 	48000,	// sample rate
62 	512,	// buffer frames
63 	2	// buffer count
64 };
65 
66 
67 static void
68 echo_channel_get_mix(void *card, MIXER_AUDIO_CHANNEL channel, int32 type, float *values) {
69 	echo_dev *dev = (echo_dev*) card;
70 	MIXER_MULTI_FUNCTION multi_function[2];
71 	PMIXER_FUNCTION function = multi_function[0].MixerFunction;
72 	INT32 size = ComputeMixerMultiFunctionSize(2);
73 	function[0].Channel = channel;
74 	function[1].Channel = channel;
75 	function[1].Channel.wChannel++;
76 	switch (type) {
77 		case B_MIX_GAIN:
78 			function[0].iFunction = function[1].iFunction = MXF_GET_LEVEL;
79 			break;
80 		case B_MIX_MUTE:
81 			function[0].iFunction = function[1].iFunction = MXF_GET_MUTE;
82 			break;
83 		case B_MIX_NOMINAL:
84 			function[0].iFunction = function[1].iFunction = MXF_GET_NOMINAL;
85 			break;
86 	}
87 
88 	multi_function[0].iCount = 2;
89 	dev->pEG->ProcessMixerMultiFunction(multi_function, size);
90 
91 	if (function[0].RtnStatus == ECHOSTATUS_OK) {
92 		if (type == B_MIX_GAIN) {
93 			values[0] = (float)function[0].Data.iLevel / 256;
94 			values[1] = (float)function[1].Data.iLevel / 256;
95 		} else if (type == B_MIX_MUTE) {
96 			values[0] = function[0].Data.bMuteOn ? 1.0 : 0.0;
97 		} else {
98 			values[0] = function[0].Data.iNominal == 4 ? 1.0 : 0.0;
99 		}
100 		PRINT(("echo_channel_get_mix iLevel: %" B_PRId32 ", %d, %" B_PRIu32
101 			"\n", function[0].Data.iLevel, channel.wChannel, channel.dwType));
102 	}
103 
104 }
105 
106 
107 static void
108 echo_channel_set_mix(void *card, MIXER_AUDIO_CHANNEL channel, int32 type, float *values) {
109 	echo_dev *dev = (echo_dev*) card;
110 	MIXER_MULTI_FUNCTION multi_function[2];
111 	PMIXER_FUNCTION function = multi_function[0].MixerFunction;
112 	INT32 size = ComputeMixerMultiFunctionSize(2);
113 	function[0].Channel = channel;
114 	function[1].Channel = channel;
115 	function[1].Channel.wChannel++;
116 	if (type == B_MIX_GAIN) {
117 		function[0].Data.iLevel = (int)(values[0] * 256);
118 		function[0].iFunction = MXF_SET_LEVEL;
119 		function[1].Data.iLevel = (int)(values[1] * 256);
120 		function[1].iFunction = MXF_SET_LEVEL;
121 	} else if (type == B_MIX_MUTE) {
122 		function[0].Data.bMuteOn = values[0] == 1.0;
123 		function[0].iFunction = MXF_SET_MUTE;
124 		function[1].Data.bMuteOn = values[0] == 1.0;
125 		function[1].iFunction = MXF_SET_MUTE;
126 	} else {
127 		function[0].Data.iNominal = values[0] == 1.0 ? 4 : -10;
128 		function[0].iFunction = MXF_SET_NOMINAL;
129 		function[1].Data.iNominal = values[0] == 1.0 ? 4 : -10;
130 		function[1].iFunction = MXF_SET_NOMINAL;
131 	}
132 
133 	multi_function[0].iCount = 2;
134 	dev->pEG->ProcessMixerMultiFunction(multi_function, size);
135 
136 	if (function[0].RtnStatus == ECHOSTATUS_OK) {
137 		PRINT(("echo_channel_set_mix OK: %" B_PRId32 ", %d, %" B_PRIu32 "\n",
138 			function[0].Data.iLevel, channel.wChannel, channel.dwType));
139 	}
140 
141 }
142 
143 
144 static int32
145 echo_create_group_control(multi_dev *multi, uint32 *index, int32 parent,
146 	enum strind_id string, const char* name) {
147 	uint32 i = *index;
148 	(*index)++;
149 	multi->controls[i].mix_control.id = MULTI_CONTROL_FIRSTID + i;
150 	multi->controls[i].mix_control.parent = parent;
151 	multi->controls[i].mix_control.flags = B_MULTI_MIX_GROUP;
152 	multi->controls[i].mix_control.master = MULTI_CONTROL_MASTERID;
153 	multi->controls[i].mix_control.string = string;
154 	if (name)
155 		strcpy(multi->controls[i].mix_control.name, name);
156 
157 	return multi->controls[i].mix_control.id;
158 }
159 
160 static void
161 echo_create_channel_control(multi_dev *multi, uint32 *index, int32 parent, int32 string,
162 	MIXER_AUDIO_CHANNEL channel, bool nominal) {
163 	uint32 i = *index, id;
164 	multi_mixer_control control;
165 
166 	control.mix_control.master = MULTI_CONTROL_MASTERID;
167 	control.mix_control.parent = parent;
168 	control.channel = channel;
169 	control.get = &echo_channel_get_mix;
170 	control.set = &echo_channel_set_mix;
171 	control.mix_control.gain.min_gain = -128;
172 	control.mix_control.gain.max_gain = 6;
173 	control.mix_control.gain.granularity = 0.5;
174 
175 	control.mix_control.id = MULTI_CONTROL_FIRSTID + i;
176 	control.mix_control.flags = B_MULTI_MIX_ENABLE;
177 	control.mix_control.string = S_MUTE;
178 	control.type = B_MIX_MUTE;
179 	multi->controls[i] = control;
180 	i++;
181 
182 	control.mix_control.id = MULTI_CONTROL_FIRSTID + i;
183 	control.mix_control.flags = B_MULTI_MIX_GAIN;
184 	control.mix_control.string = S_null;
185 	control.type = B_MIX_GAIN;
186 	strcpy(control.mix_control.name, "Gain");
187 	multi->controls[i] = control;
188 	id = control.mix_control.id;
189 	i++;
190 
191 	// second channel
192 	control.mix_control.id = MULTI_CONTROL_FIRSTID + i;
193 	control.mix_control.master = id;
194 	multi->controls[i] = control;
195 	i++;
196 
197 	// nominal level (+4/-10)
198 	if (nominal) {
199 		control.mix_control.id = MULTI_CONTROL_FIRSTID + i;
200 		control.mix_control.master = MULTI_CONTROL_MASTERID;
201 		control.mix_control.flags = B_MULTI_MIX_ENABLE;
202 		control.mix_control.string = S_null;
203 		control.type = B_MIX_NOMINAL;
204 		strcpy(control.mix_control.name, "+4dB");
205 		multi->controls[i] = control;
206 		i++;
207 	}
208 
209 	*index = i;
210 }
211 
212 
213 static status_t
214 echo_create_controls_list(multi_dev *multi)
215 {
216 	uint32 	i = 0, index = 0, parent, parent2;
217 	echo_dev *card = (echo_dev*)multi->card;
218 
219 	parent = echo_create_group_control(multi, &index, 0, S_OUTPUT, NULL);
220 
221 	MIXER_AUDIO_CHANNEL channel;
222 	channel.wCardId = 0;
223 	channel.dwType = ECHO_BUS_OUT;
224 	for (i = 0; i < card->caps.wNumBussesOut / 2; i++) {
225 		channel.wChannel = i * 2;
226 		parent2 = echo_create_group_control(multi, &index, parent, S_null, "Output");
227 
228 		echo_create_channel_control(multi, &index, parent2, 0, channel,
229 			card->caps.dwBusOutCaps[i * 2] & ECHOCAPS_NOMINAL_LEVEL);
230 	}
231 
232 	parent = echo_create_group_control(multi, &index, 0, S_INPUT, NULL);
233 
234 	channel.dwType = ECHO_BUS_IN;
235 	for (i = 0; i < card->caps.wNumBussesIn / 2; i++) {
236 		channel.wChannel = i * 2;
237 
238 		parent2 = echo_create_group_control(multi, &index, parent, S_null, "Input");
239 
240 		echo_create_channel_control(multi, &index, parent2, 0, channel,
241 			card->caps.dwBusInCaps[i * 2] & ECHOCAPS_NOMINAL_LEVEL);
242 	}
243 
244 	multi->control_count = index;
245 	PRINT(("multi->control_count %" B_PRIu32 "\n", multi->control_count));
246 	return B_OK;
247 }
248 
249 
250 static status_t
251 echo_get_mix(echo_dev *card, multi_mix_value_info * mmvi)
252 {
253 	int32 i;
254 	int32 id;
255 	multi_mixer_control *control = NULL;
256 	for (i = 0; i < mmvi->item_count; i++) {
257 		id = mmvi->values[i].id - MULTI_CONTROL_FIRSTID;
258 		if (id < 0 || (uint32)id >= card->multi.control_count) {
259 			PRINT(("echo_get_mix : invalid control id requested : %" B_PRIu32
260 				"\n", id));
261 			continue;
262 		}
263 		control = &card->multi.controls[id];
264 
265 		if (control->mix_control.flags & B_MULTI_MIX_GAIN) {
266 			if (control->get) {
267 				float values[2];
268 				control->get(card, control->channel, control->type, values);
269 				if (control->mix_control.master == MULTI_CONTROL_MASTERID)
270 					mmvi->values[i].gain = values[0];
271 				else
272 					mmvi->values[i].gain = values[1];
273 			}
274 		}
275 
276 		if (control->mix_control.flags & B_MULTI_MIX_ENABLE && control->get) {
277 			float values[1];
278 			control->get(card, control->channel, control->type, values);
279 			mmvi->values[i].enable = (values[0] == 1.0);
280 		}
281 
282 		if (control->mix_control.flags & B_MULTI_MIX_MUX && control->get) {
283 			float values[1];
284 			control->get(card, control->channel, control->type, values);
285 			mmvi->values[i].mux = (int32)values[0];
286 		}
287 	}
288 	return B_OK;
289 }
290 
291 
292 static status_t
293 echo_set_mix(echo_dev *card, multi_mix_value_info * mmvi)
294 {
295 	int32 i;
296 	int32 id;
297 	multi_mixer_control *control = NULL;
298 	for (i = 0; i < mmvi->item_count; i++) {
299 		id = mmvi->values[i].id - MULTI_CONTROL_FIRSTID;
300 		if (id < 0 || (uint32)id >= card->multi.control_count) {
301 			PRINT(("echo_set_mix : invalid control id requested : %" B_PRIu32
302 				"\n", id));
303 			continue;
304 		}
305 		control = &card->multi.controls[id];
306 
307 		if (control->mix_control.flags & B_MULTI_MIX_GAIN) {
308 			multi_mixer_control *control2 = NULL;
309 			if (i + 1 < mmvi->item_count) {
310 				id = mmvi->values[i + 1].id - MULTI_CONTROL_FIRSTID;
311 				if (id < 0 || (uint32)id >= card->multi.control_count) {
312 					PRINT(("echo_set_mix : invalid control id requested : %"
313 						B_PRIu32 "\n", id));
314 				} else {
315 					control2 = &card->multi.controls[id];
316 					if (control2->mix_control.master != control->mix_control.id)
317 						control2 = NULL;
318 				}
319 			}
320 
321 			if (control->set) {
322 				float values[2];
323 				values[0] = 0.0;
324 				values[1] = 0.0;
325 
326 				if (control->mix_control.master == MULTI_CONTROL_MASTERID)
327 					values[0] = mmvi->values[i].gain;
328 				else
329 					values[1] = mmvi->values[i].gain;
330 
331 				if (control2 && control2->mix_control.master != MULTI_CONTROL_MASTERID)
332 					values[1] = mmvi->values[i + 1].gain;
333 
334 				control->set(card, control->channel, control->type, values);
335 			}
336 
337 			if (control2)
338 				i++;
339 		}
340 
341 		if (control->mix_control.flags & B_MULTI_MIX_ENABLE && control->set) {
342 			float values[1];
343 
344 			values[0] = mmvi->values[i].enable ? 1.0 : 0.0;
345 			control->set(card, control->channel, control->type, values);
346 		}
347 
348 		if (control->mix_control.flags & B_MULTI_MIX_MUX && control->set) {
349 			float values[1];
350 
351 			values[0] = (float)mmvi->values[i].mux;
352 			control->set(card, control->channel, control->type, values);
353 		}
354 	}
355 	return B_OK;
356 }
357 
358 
359 static status_t
360 echo_list_mix_controls(echo_dev *card, multi_mix_control_info * mmci)
361 {
362 	multi_mix_control	*mmc;
363 	uint32 i;
364 
365 	mmc = mmci->controls;
366 	if (mmci->control_count < 24)
367 		return B_ERROR;
368 
369 	if (echo_create_controls_list(&card->multi) < B_OK)
370 		return B_ERROR;
371 	for (i = 0; i < card->multi.control_count; i++) {
372 		mmc[i] = card->multi.controls[i].mix_control;
373 	}
374 
375 	mmci->control_count = card->multi.control_count;
376 	return B_OK;
377 }
378 
379 
380 static status_t
381 echo_list_mix_connections(echo_dev* card, multi_mix_connection_info* data)
382 {
383 	return B_ERROR;
384 }
385 
386 
387 static status_t
388 echo_list_mix_channels(echo_dev *card, multi_mix_channel_info *data)
389 {
390 	return B_ERROR;
391 }
392 
393 /*multi_channel_info chans[] = {
394 {  0, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
395 {  1, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
396 {  2, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
397 {  3, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
398 {  4, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
399 {  5, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
400 {  6, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
401 {  7, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
402 {  8, B_MULTI_OUTPUT_BUS, 		B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 	B_CHANNEL_MINI_JACK_STEREO },
403 {  9, B_MULTI_OUTPUT_BUS, 		B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, B_CHANNEL_MINI_JACK_STEREO },
404 {  10, B_MULTI_INPUT_BUS, 		B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 	B_CHANNEL_MINI_JACK_STEREO },
405 {  11, B_MULTI_INPUT_BUS, 		B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, B_CHANNEL_MINI_JACK_STEREO },
406 };*/
407 
408 /*multi_channel_info chans[] = {
409 {  0, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
410 {  1, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
411 {  2, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_SURROUND_BUS, 0 },
412 {  3, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_SURROUND_BUS, 0 },
413 {  4, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_REARLEFT | B_CHANNEL_SURROUND_BUS, 0 },
414 {  5, B_MULTI_OUTPUT_CHANNEL, 	B_CHANNEL_REARRIGHT | B_CHANNEL_SURROUND_BUS, 0 },
415 {  6, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
416 {  7, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
417 {  8, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 0 },
418 {  9, B_MULTI_INPUT_CHANNEL, 	B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, 0 },
419 {  10, B_MULTI_OUTPUT_BUS, 		B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 	B_CHANNEL_MINI_JACK_STEREO },
420 {  11, B_MULTI_OUTPUT_BUS, 		B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, B_CHANNEL_MINI_JACK_STEREO },
421 {  12, B_MULTI_INPUT_BUS, 		B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS, 	B_CHANNEL_MINI_JACK_STEREO },
422 {  13, B_MULTI_INPUT_BUS, 		B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS, B_CHANNEL_MINI_JACK_STEREO },
423 };*/
424 
425 
426 static void
427 echo_create_channels_list(multi_dev *multi)
428 {
429 	echo_stream *stream;
430 	int32 mode;
431 	uint32 index, i, designations;
432 	multi_channel_info *chans;
433 	uint32 chan_designations[] = {
434 		B_CHANNEL_LEFT,
435 		B_CHANNEL_RIGHT,
436 		B_CHANNEL_REARLEFT,
437 		B_CHANNEL_REARRIGHT,
438 		B_CHANNEL_CENTER,
439 		B_CHANNEL_SUB
440 	};
441 
442 	chans = multi->chans;
443 	index = 0;
444 
445 	for (mode=ECHO_USE_PLAY; mode!=-1;
446 		mode = (mode == ECHO_USE_PLAY) ? ECHO_USE_RECORD : -1) {
447 		LIST_FOREACH(stream, &((echo_dev*)multi->card)->streams, next) {
448 			if ((stream->use & mode) == 0)
449 				continue;
450 
451 			if (stream->channels == 2)
452 				designations = B_CHANNEL_STEREO_BUS;
453 			else
454 				designations = B_CHANNEL_SURROUND_BUS;
455 
456 			for (i = 0; i < stream->channels; i++) {
457 				chans[index].channel_id = index;
458 				chans[index].kind = (mode == ECHO_USE_PLAY) ? B_MULTI_OUTPUT_CHANNEL : B_MULTI_INPUT_CHANNEL;
459 				chans[index].designations = designations | chan_designations[i];
460 				chans[index].connectors = 0;
461 				index++;
462 			}
463 		}
464 
465 		if (mode==ECHO_USE_PLAY) {
466 			multi->output_channel_count = index;
467 		} else {
468 			multi->input_channel_count = index - multi->output_channel_count;
469 		}
470 	}
471 
472 	chans[index].channel_id = index;
473 	chans[index].kind = B_MULTI_OUTPUT_BUS;
474 	chans[index].designations = B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS;
475 	chans[index].connectors = B_CHANNEL_MINI_JACK_STEREO;
476 	index++;
477 
478 	chans[index].channel_id = index;
479 	chans[index].kind = B_MULTI_OUTPUT_BUS;
480 	chans[index].designations = B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS;
481 	chans[index].connectors = B_CHANNEL_MINI_JACK_STEREO;
482 	index++;
483 
484 	multi->output_bus_channel_count = index - multi->output_channel_count
485 		- multi->input_channel_count;
486 
487 	chans[index].channel_id = index;
488 	chans[index].kind = B_MULTI_INPUT_BUS;
489 	chans[index].designations = B_CHANNEL_LEFT | B_CHANNEL_STEREO_BUS;
490 	chans[index].connectors = B_CHANNEL_MINI_JACK_STEREO;
491 	index++;
492 
493 	chans[index].channel_id = index;
494 	chans[index].kind = B_MULTI_INPUT_BUS;
495 	chans[index].designations = B_CHANNEL_RIGHT | B_CHANNEL_STEREO_BUS;
496 	chans[index].connectors = B_CHANNEL_MINI_JACK_STEREO;
497 	index++;
498 
499 	multi->input_bus_channel_count = index - multi->output_channel_count
500 		- multi->input_channel_count - multi->output_bus_channel_count;
501 
502 	multi->aux_bus_channel_count = 0;
503 }
504 
505 
506 static status_t
507 echo_get_description(echo_dev *card, multi_description *data)
508 {
509 	int32 size;
510 
511 	data->interface_version = B_CURRENT_INTERFACE_VERSION;
512 	data->interface_minimum = B_CURRENT_INTERFACE_VERSION;
513 
514 	strlcpy(data->friendly_name, card->caps.szName, sizeof(data->friendly_name));
515 	strlcpy(data->vendor_info, AUTHOR, sizeof(data->vendor_info));
516 
517 	data->output_channel_count = card->multi.output_channel_count;
518 	data->input_channel_count = card->multi.input_channel_count;
519 	data->output_bus_channel_count = card->multi.output_bus_channel_count;
520 	data->input_bus_channel_count = card->multi.input_bus_channel_count;
521 	data->aux_bus_channel_count = card->multi.aux_bus_channel_count;
522 
523 	size = card->multi.output_channel_count + card->multi.input_channel_count
524 			+ card->multi.output_bus_channel_count + card->multi.input_bus_channel_count
525 			+ card->multi.aux_bus_channel_count;
526 
527 	// for each channel, starting with the first output channel,
528 	// then the second, third..., followed by the first input
529 	// channel, second, third, ..., followed by output bus
530 	// channels and input bus channels and finally auxillary channels,
531 
532 	LOG(("request_channel_count = %d\n",data->request_channel_count));
533 	if (data->request_channel_count >= size) {
534 		LOG(("copying data\n"));
535 		memcpy(data->channels, card->multi.chans, size * sizeof(card->multi.chans[0]));
536 	}
537 
538 	switch (current_settings.sample_rate) {
539 		case 192000: data->output_rates = data->input_rates = B_SR_192000; break;
540 		case 96000: data->output_rates = data->input_rates = B_SR_96000; break;
541 		case 48000: data->output_rates = data->input_rates = B_SR_48000; break;
542 		case 44100: data->output_rates = data->input_rates = B_SR_44100; break;
543 	}
544 	data->min_cvsr_rate = 0;
545 	data->max_cvsr_rate = 48000;
546 
547 	switch (current_settings.bitsPerSample) {
548 		case 8: data->output_formats = data->input_formats = B_FMT_8BIT_U; break;
549 		case 16: data->output_formats = data->input_formats = B_FMT_16BIT; break;
550 		case 24: data->output_formats = data->input_formats = B_FMT_24BIT; break;
551 		case 32: data->output_formats = data->input_formats = B_FMT_32BIT; break;
552 	}
553 	data->lock_sources = B_MULTI_LOCK_INTERNAL;
554 	data->timecode_sources = 0;
555 	data->interface_flags = B_MULTI_INTERFACE_PLAYBACK | B_MULTI_INTERFACE_RECORD;
556 	data->start_latency = 3000;
557 
558 	strcpy(data->control_panel, "");
559 
560 	return B_OK;
561 }
562 
563 
564 static status_t
565 echo_get_enabled_channels(echo_dev *card, multi_channel_enable *data)
566 {
567 	B_SET_CHANNEL(data->enable_bits, 0, true);
568 	B_SET_CHANNEL(data->enable_bits, 1, true);
569 	B_SET_CHANNEL(data->enable_bits, 2, true);
570 	B_SET_CHANNEL(data->enable_bits, 3, true);
571 	data->lock_source = B_MULTI_LOCK_INTERNAL;
572 /*
573 	uint32			lock_source;
574 	int32			lock_data;
575 	uint32			timecode_source;
576 	uint32 *		connectors;
577 */
578 	return B_OK;
579 }
580 
581 
582 static status_t
583 echo_set_enabled_channels(echo_dev *card, multi_channel_enable *data)
584 {
585 	PRINT(("set_enabled_channels 0 : %s\n", B_TEST_CHANNEL(data->enable_bits, 0) ? "enabled": "disabled"));
586 	PRINT(("set_enabled_channels 1 : %s\n", B_TEST_CHANNEL(data->enable_bits, 1) ? "enabled": "disabled"));
587 	PRINT(("set_enabled_channels 2 : %s\n", B_TEST_CHANNEL(data->enable_bits, 2) ? "enabled": "disabled"));
588 	PRINT(("set_enabled_channels 3 : %s\n", B_TEST_CHANNEL(data->enable_bits, 3) ? "enabled": "disabled"));
589 	return B_OK;
590 }
591 
592 
593 static status_t
594 echo_get_global_format(echo_dev *card, multi_format_info *data)
595 {
596 	data->output_latency = 0;
597 	data->input_latency = 0;
598 	data->timecode_kind = 0;
599 	switch (current_settings.sample_rate) {
600 		case 192000: data->output.rate = data->input.rate = B_SR_192000; break;
601 		case 96000: data->output.rate = data->input.rate = B_SR_96000; break;
602 		case 48000: data->output.rate = data->input.rate = B_SR_48000; break;
603 		case 44100: data->output.rate = data->input.rate = B_SR_44100; break;
604 	}
605 	switch (current_settings.bitsPerSample) {
606 		case 8: data->input.format = data->output.format = B_FMT_8BIT_U; break;
607 		case 16: data->input.format = data->output.format = B_FMT_16BIT; break;
608 		case 24: data->input.format = data->output.format = B_FMT_24BIT; break;
609 		case 32: data->input.format = data->output.format = B_FMT_32BIT; break;
610 	}
611 	data->input.cvsr = data->output.cvsr = current_settings.sample_rate;
612 	return B_OK;
613 }
614 
615 
616 static status_t
617 echo_get_buffers(echo_dev *card, multi_buffer_list *data)
618 {
619 	int32 i, j, channels;
620 	echo_stream *stream;
621 
622 	LOG(("flags = %#x\n",data->flags));
623 	LOG(("request_playback_buffers = %#x\n",data->request_playback_buffers));
624 	LOG(("request_playback_channels = %#x\n",data->request_playback_channels));
625 	LOG(("request_playback_buffer_size = %#x\n",data->request_playback_buffer_size));
626 	LOG(("request_record_buffers = %#x\n",data->request_record_buffers));
627 	LOG(("request_record_channels = %#x\n",data->request_record_channels));
628 	LOG(("request_record_buffer_size = %#x\n",data->request_record_buffer_size));
629 
630 	if (data->request_playback_buffers < current_settings.buffer_count ||
631 		data->request_record_buffers < current_settings.buffer_count) {
632 		LOG(("not enough channels/buffers\n"));
633 	}
634 
635 	ASSERT(current_settings.buffer_count == 2);
636 
637 	data->flags = B_MULTI_BUFFER_PLAYBACK | B_MULTI_BUFFER_RECORD; // XXX ???
638 
639 	data->return_playback_buffers = current_settings.buffer_count;	/* playback_buffers[b][] */
640 	data->return_playback_channels = 0;	/* playback_buffers[][c] */
641 	data->return_playback_buffer_size = current_settings.buffer_frames;		/* frames */
642 
643 	LIST_FOREACH(stream, &card->streams, next) {
644 		if ((stream->use & ECHO_USE_PLAY) == 0)
645 			continue;
646 		LOG(("get_buffers pipe %d\n", stream->pipe));
647 		channels = data->return_playback_channels;
648 		data->return_playback_channels += stream->channels;
649 		if (data->request_playback_channels < data->return_playback_channels) {
650 			LOG(("not enough channels\n"));
651 		}
652 		for (i = 0; i < current_settings.buffer_count; i++)
653 			for (j=0; j<stream->channels; j++)
654 				echo_stream_get_nth_buffer(stream, j, i,
655 					&data->playback_buffers[i][channels+j].base,
656 					&data->playback_buffers[i][channels+j].stride);
657 	}
658 
659 	data->return_record_buffers = current_settings.buffer_count;
660 	data->return_record_channels = 0;
661 	data->return_record_buffer_size = current_settings.buffer_frames;	/* frames */
662 
663 	LIST_FOREACH(stream, &card->streams, next) {
664 		if ((stream->use & ECHO_USE_PLAY) != 0)
665 			continue;
666 		LOG(("get_buffers pipe %d\n", stream->pipe));
667 		channels = data->return_record_channels;
668 		data->return_record_channels += stream->channels;
669 		if (data->request_record_channels < data->return_record_channels) {
670 			LOG(("not enough channels\n"));
671 		}
672 		for (i = 0; i < current_settings.buffer_count; i++)
673 			for (j = 0; j < stream->channels; j++)
674 				echo_stream_get_nth_buffer(stream, j, i,
675 					&data->record_buffers[i][channels + j].base,
676 					&data->record_buffers[i][channels + j].stride);
677 	}
678 
679 	return B_OK;
680 }
681 
682 
683 void
684 echo_play_inth(void* inthparams)
685 {
686 	echo_stream *stream = (echo_stream *)inthparams;
687 	//int32 count;
688 
689 	//TRACE(("echo_play_inth\n"));
690 
691 	acquire_spinlock(&slock);
692 	stream->real_time = system_time();
693 	stream->frames_count += current_settings.buffer_frames;
694 	stream->buffer_cycle = (stream->trigblk
695 		+ stream->blkmod) % stream->blkmod;
696 	stream->update_needed = true;
697 	release_spinlock(&slock);
698 
699 	//get_sem_count(stream->card->buffer_ready_sem, &count);
700 	//if (count <= 0)
701 		release_sem_etc(stream->card->buffer_ready_sem, 1, B_DO_NOT_RESCHEDULE);
702 }
703 
704 
705 void
706 echo_record_inth(void* inthparams)
707 {
708 	echo_stream *stream = (echo_stream *)inthparams;
709 	//int32 count;
710 
711 	//TRACE(("echo_record_inth\n"));
712 
713 	acquire_spinlock(&slock);
714 	stream->real_time = system_time();
715 	stream->frames_count += current_settings.buffer_frames;
716 	stream->buffer_cycle = (stream->trigblk
717 		+ stream->blkmod - 1) % stream->blkmod;
718 	stream->update_needed = true;
719 	release_spinlock(&slock);
720 
721 	//get_sem_count(stream->card->buffer_ready_sem, &count);
722 	//if (count <= 0)
723 		release_sem_etc(stream->card->buffer_ready_sem, 1, B_DO_NOT_RESCHEDULE);
724 }
725 
726 
727 static status_t
728 echo_buffer_exchange(echo_dev *card, multi_buffer_info *data)
729 {
730 	cpu_status status;
731 	echo_stream *pstream, *rstream, *stream;
732 	multi_buffer_info buffer_info;
733 
734 #ifdef __HAIKU__
735 	if (user_memcpy(&buffer_info, data, sizeof(buffer_info)) < B_OK)
736 		return B_BAD_ADDRESS;
737 #else
738 	memcpy(&buffer_info, data, sizeof(buffer_info));
739 #endif
740 
741 	buffer_info.flags = B_MULTI_BUFFER_PLAYBACK | B_MULTI_BUFFER_RECORD;
742 
743 	LIST_FOREACH(stream, &card->streams, next) {
744 		if ((stream->state & ECHO_STATE_STARTED) != 0)
745 			continue;
746 		echo_stream_start(stream,
747 			((stream->use & ECHO_USE_PLAY) == 0) ? echo_record_inth : echo_play_inth, stream);
748 	}
749 
750 	if (acquire_sem_etc(card->buffer_ready_sem, 1, B_RELATIVE_TIMEOUT | B_CAN_INTERRUPT, 50000)
751 		== B_TIMED_OUT) {
752 		LOG(("buffer_exchange timeout ff\n"));
753 	}
754 
755 	status = lock();
756 
757 	LIST_FOREACH(pstream, &card->streams, next) {
758 		if ((pstream->use & ECHO_USE_PLAY) == 0 ||
759 			(pstream->state & ECHO_STATE_STARTED) == 0)
760 			continue;
761 		if (pstream->update_needed)
762 			break;
763 	}
764 
765 	LIST_FOREACH(rstream, &card->streams, next) {
766 		if ((rstream->use & ECHO_USE_RECORD) == 0 ||
767 			(rstream->state & ECHO_STATE_STARTED) == 0)
768 			continue;
769 		if (rstream->update_needed)
770 			break;
771 	}
772 
773 	if (!pstream)
774 		pstream = card->pstream;
775 	if (!rstream)
776 		rstream = card->rstream;
777 
778 	/* do playback */
779 	buffer_info.playback_buffer_cycle = pstream->buffer_cycle;
780 	buffer_info.played_real_time = pstream->real_time;
781 	buffer_info.played_frames_count = pstream->frames_count;
782 	buffer_info._reserved_0 = pstream->first_channel;
783 	pstream->update_needed = false;
784 
785 	/* do record */
786 	buffer_info.record_buffer_cycle = rstream->buffer_cycle;
787 	buffer_info.recorded_frames_count = rstream->frames_count;
788 	buffer_info.recorded_real_time = rstream->real_time;
789 	buffer_info._reserved_1 = rstream->first_channel;
790 	rstream->update_needed = false;
791 	unlock(status);
792 
793 #ifdef __HAIKU__
794 	if (user_memcpy(data, &buffer_info, sizeof(buffer_info)) < B_OK)
795 		return B_BAD_ADDRESS;
796 #else
797 	memcpy(data, &buffer_info, sizeof(buffer_info));
798 #endif
799 
800 	//TRACE(("buffer_exchange ended\n"));
801 	return B_OK;
802 }
803 
804 
805 static status_t
806 echo_buffer_force_stop(echo_dev *card)
807 {
808 	//echo_voice_halt(card->pvoice);
809 	return B_OK;
810 }
811 
812 
813 static status_t
814 echo_multi_control(void *cookie, uint32 op, void *data, size_t length)
815 {
816 	echo_dev *card = (echo_dev *)cookie;
817 
818 #ifdef CARDBUS
819 	// Check
820 	if (card->plugged == false) {
821 		LOG(("device %s unplugged\n", card->name));
822 		return B_ERROR;
823 	}
824 #endif
825 
826 	switch (op) {
827 		case B_MULTI_GET_DESCRIPTION:
828 			LOG(("B_MULTI_GET_DESCRIPTION\n"));
829 			return echo_get_description(card, (multi_description *)data);
830 		case B_MULTI_GET_EVENT_INFO:
831 			LOG(("B_MULTI_GET_EVENT_INFO\n"));
832 			return B_ERROR;
833 		case B_MULTI_SET_EVENT_INFO:
834 			LOG(("B_MULTI_SET_EVENT_INFO\n"));
835 			return B_ERROR;
836 		case B_MULTI_GET_EVENT:
837 			LOG(("B_MULTI_GET_EVENT\n"));
838 			return B_ERROR;
839 		case B_MULTI_GET_ENABLED_CHANNELS:
840 			LOG(("B_MULTI_GET_ENABLED_CHANNELS\n"));
841 			return echo_get_enabled_channels(card, (multi_channel_enable *)data);
842 		case B_MULTI_SET_ENABLED_CHANNELS:
843 			LOG(("B_MULTI_SET_ENABLED_CHANNELS\n"));
844 			return echo_set_enabled_channels(card, (multi_channel_enable *)data);
845 		case B_MULTI_GET_GLOBAL_FORMAT:
846 			LOG(("B_MULTI_GET_GLOBAL_FORMAT\n"));
847 			return echo_get_global_format(card, (multi_format_info *)data);
848 		case B_MULTI_SET_GLOBAL_FORMAT:
849 			LOG(("B_MULTI_SET_GLOBAL_FORMAT\n"));
850 			return B_OK; /* XXX BUG! we *MUST* return B_OK, returning B_ERROR will prevent
851 						  * BeOS to accept the format returned in B_MULTI_GET_GLOBAL_FORMAT
852 						  */
853 		case B_MULTI_GET_CHANNEL_FORMATS:
854 			LOG(("B_MULTI_GET_CHANNEL_FORMATS\n"));
855 			return B_ERROR;
856 		case B_MULTI_SET_CHANNEL_FORMATS:	/* only implemented if possible */
857 			LOG(("B_MULTI_SET_CHANNEL_FORMATS\n"));
858 			return B_ERROR;
859 		case B_MULTI_GET_MIX:
860 			LOG(("B_MULTI_GET_MIX\n"));
861 			return echo_get_mix(card, (multi_mix_value_info *)data);
862 		case B_MULTI_SET_MIX:
863 			LOG(("B_MULTI_SET_MIX\n"));
864 			return echo_set_mix(card, (multi_mix_value_info *)data);
865 		case B_MULTI_LIST_MIX_CHANNELS:
866 			LOG(("B_MULTI_LIST_MIX_CHANNELS\n"));
867 			return echo_list_mix_channels(card, (multi_mix_channel_info *)data);
868 		case B_MULTI_LIST_MIX_CONTROLS:
869 			LOG(("B_MULTI_LIST_MIX_CONTROLS\n"));
870 			return echo_list_mix_controls(card, (multi_mix_control_info *)data);
871 		case B_MULTI_LIST_MIX_CONNECTIONS:
872 			LOG(("B_MULTI_LIST_MIX_CONNECTIONS\n"));
873 			return echo_list_mix_connections(card, (multi_mix_connection_info *)data);
874 		case B_MULTI_GET_BUFFERS:			/* Fill out the struct for the first time; doesn't start anything. */
875 			LOG(("B_MULTI_GET_BUFFERS\n"));
876 			return echo_get_buffers(card, (multi_buffer_list*)data);
877 		case B_MULTI_SET_BUFFERS:			/* Set what buffers to use, if the driver supports soft buffers. */
878 			LOG(("B_MULTI_SET_BUFFERS\n"));
879 			return B_ERROR; /* we do not support soft buffers */
880 		case B_MULTI_SET_START_TIME:			/* When to actually start */
881 			LOG(("B_MULTI_SET_START_TIME\n"));
882 			return B_ERROR;
883 		case B_MULTI_BUFFER_EXCHANGE:		/* stop and go are derived from this being called */
884 			//TRACE(("B_MULTI_BUFFER_EXCHANGE\n"));
885 			return echo_buffer_exchange(card, (multi_buffer_info *)data);
886 		case B_MULTI_BUFFER_FORCE_STOP:		/* force stop of playback, nothing in data */
887 			LOG(("B_MULTI_BUFFER_FORCE_STOP\n"));
888 			return echo_buffer_force_stop(card);
889 	}
890 	LOG(("ERROR: unknown multi_control %#x\n",op));
891 	return B_ERROR;
892 }
893 
894 
895 static status_t echo_open(const char *name, uint32 flags, void** cookie);
896 static status_t echo_close(void* cookie);
897 static status_t echo_free(void* cookie);
898 static status_t echo_control(void* cookie, uint32 op, void* arg, size_t len);
899 static status_t echo_read(void* cookie, off_t position, void *buf, size_t* num_bytes);
900 static status_t echo_write(void* cookie, off_t position, const void* buffer, size_t* num_bytes);
901 
902 
903 device_hooks multi_hooks = {
904 	echo_open, 			/* -> open entry point */
905 	echo_close, 			/* -> close entry point */
906 	echo_free,			/* -> free cookie */
907 	echo_control, 		/* -> control entry point */
908 	echo_read,			/* -> read entry point */
909 	echo_write,			/* -> write entry point */
910 	NULL,					/* start select */
911 	NULL,					/* stop select */
912 	NULL,					/* scatter-gather read from the device */
913 	NULL					/* scatter-gather write to the device */
914 };
915 
916 
917 static status_t
918 echo_open(const char *name, uint32 flags, void** cookie)
919 {
920 	echo_dev *card = NULL;
921 	int i, first_record_channel;
922 	echo_stream *stream = NULL;
923 
924 	LOG(("echo_open()\n"));
925 
926 #ifdef CARDBUS
927 	LIST_FOREACH(card, &devices, next) {
928 		if (!strcmp(card->name, name)) {
929 			break;
930 		}
931 	}
932 #else
933 	for (i = 0; i < num_cards; i++) {
934 		if (!strcmp(cards[i].name, name)) {
935 			card = &cards[i];
936 		}
937 	}
938 #endif
939 
940 	if (card == NULL) {
941 		LOG(("open() card not found %s\n", name));
942 #ifdef CARDBUS
943 		LIST_FOREACH(card, &devices, next) {
944 			LOG(("open() card available %s\n", card->name));
945 		}
946 #else
947 		for (int ix=0; ix<num_cards; ix++) {
948 			LOG(("open() card available %s\n", cards[ix].name));
949 		}
950 #endif
951 		return B_ERROR;
952 	}
953 
954 #ifdef CARDBUS
955 	if (card->plugged == false) {
956 		LOG(("device %s unplugged\n", name));
957 		return B_ERROR;
958 	}
959 #endif
960 
961 	LOG(("open() got card\n"));
962 
963 	if (card->pstream != NULL)
964 		return B_ERROR;
965 	if (card->rstream != NULL)
966 		return B_ERROR;
967 
968 	*cookie = card;
969 	card->multi.card = card;
970 #ifdef CARDBUS
971 	card->opened = true;
972 #endif
973 
974 	void *settings_handle;
975 	// get driver settings
976 	settings_handle = load_driver_settings ("echo.settings");
977 	if (settings_handle != NULL) {
978 		const char* item;
979 		char* end;
980 		uint32 value;
981 
982 		item = get_driver_parameter (settings_handle, "channels", NULL, NULL);
983 		if (item) {
984 			value = strtoul (item, &end, 0);
985 			if (*end == '\0') current_settings.channels = value;
986 		}
987 		PRINT(("channels %u\n", current_settings.channels));
988 
989 		item = get_driver_parameter (settings_handle, "bitsPerSample", NULL, NULL);
990 		if (item) {
991 			value = strtoul (item, &end, 0);
992 			if (*end == '\0') current_settings.bitsPerSample = value;
993 		}
994 		PRINT(("bitsPerSample %u\n", current_settings.bitsPerSample));
995 
996 		item = get_driver_parameter (settings_handle, "sample_rate", NULL, NULL);
997 		if (item) {
998 			value = strtoul (item, &end, 0);
999 			if (*end == '\0') current_settings.sample_rate = value;
1000 		}
1001 		PRINT(("sample_rate %" B_PRIu32 "\n", current_settings.sample_rate));
1002 
1003 		item = get_driver_parameter (settings_handle, "buffer_frames", NULL, NULL);
1004 		if (item) {
1005 			value = strtoul (item, &end, 0);
1006 			if (*end == '\0') current_settings.buffer_frames = value;
1007 		}
1008 		PRINT(("buffer_frames %" B_PRIu32 "\n", current_settings.buffer_frames));
1009 
1010 		item = get_driver_parameter (settings_handle, "buffer_count", NULL, NULL);
1011 		if (item) {
1012 			value = strtoul (item, &end, 0);
1013 			if (*end == '\0') current_settings.buffer_count = value;
1014 		}
1015 		PRINT(("buffer_count %" B_PRId32 "\n", current_settings.buffer_count));
1016 
1017 		unload_driver_settings (settings_handle);
1018 	}
1019 
1020 	LOG(("creating play streams\n"));
1021 
1022 	i = card->caps.wNumPipesOut - 2;
1023 	first_record_channel = card->caps.wNumPipesOut;
1024 #ifdef ECHO3G_FAMILY
1025 	if (current_settings.sample_rate > 50000) {
1026 		i = card->caps.wFirstDigitalBusOut;
1027 		first_record_channel = card->caps.wFirstDigitalBusOut + 2;
1028 	}
1029 #endif
1030 
1031 	for (; i >= 0 ; i -= 2) {
1032 		stream = echo_stream_new(card, ECHO_USE_PLAY, current_settings.buffer_frames, current_settings.buffer_count);
1033 		if (!card->pstream)
1034 			card->pstream = stream;
1035 		echo_stream_set_audioparms(stream, current_settings.channels,
1036 			current_settings.bitsPerSample, current_settings.sample_rate, i);
1037 		stream->first_channel = i;
1038 	}
1039 
1040 	LOG(("creating record streams\n"));
1041 	i = card->caps.wNumPipesIn - 2;
1042 #ifdef ECHO3G_FAMILY
1043 	if (current_settings.sample_rate > 50000) {
1044 		i = card->caps.wFirstDigitalBusIn;
1045 	}
1046 #endif
1047 
1048 	for (; i >= 0; i-=2) {
1049 		stream = echo_stream_new(card, ECHO_USE_RECORD, current_settings.buffer_frames, current_settings.buffer_count);
1050 		if (!card->rstream)
1051 			card->rstream = stream;
1052 		echo_stream_set_audioparms(stream, current_settings.channels,
1053 			current_settings.bitsPerSample, current_settings.sample_rate, i);
1054 		stream->first_channel = i + first_record_channel;
1055 	}
1056 
1057 	card->buffer_ready_sem = create_sem(0, "pbuffer ready");
1058 
1059 	LOG(("creating channels list\n"));
1060 	echo_create_channels_list(&card->multi);
1061 
1062 	return B_OK;
1063 }
1064 
1065 
1066 static status_t
1067 echo_close(void* cookie)
1068 {
1069 	LOG(("close()\n"));
1070 #ifdef CARDBUS
1071 	echo_dev *card = (echo_dev *) cookie;
1072 	card->opened = false;
1073 #endif
1074 
1075 	return B_OK;
1076 }
1077 
1078 
1079 static status_t
1080 echo_free(void* cookie)
1081 {
1082 	echo_dev *card = (echo_dev *) cookie;
1083 	echo_stream *stream;
1084 	LOG(("echo_free()\n"));
1085 
1086 	if (card->buffer_ready_sem > B_OK)
1087 			delete_sem(card->buffer_ready_sem);
1088 
1089 	LIST_FOREACH(stream, &card->streams, next) {
1090 		echo_stream_halt(stream);
1091 	}
1092 
1093 	while (!LIST_EMPTY(&card->streams)) {
1094 		echo_stream_delete(LIST_FIRST(&card->streams));
1095 	}
1096 
1097 	card->pstream = NULL;
1098 	card->rstream = NULL;
1099 
1100 	return B_OK;
1101 }
1102 
1103 
1104 static status_t
1105 echo_control(void* cookie, uint32 op, void* arg, size_t len)
1106 {
1107 	return echo_multi_control(cookie, op, arg, len);
1108 }
1109 
1110 
1111 static status_t
1112 echo_read(void* cookie, off_t position, void *buf, size_t* num_bytes)
1113 {
1114 	*num_bytes = 0;				/* tell caller nothing was read */
1115 	return B_IO_ERROR;
1116 }
1117 
1118 
1119 static status_t
1120 echo_write(void* cookie, off_t position, const void* buffer, size_t* num_bytes)
1121 {
1122 	*num_bytes = 0;				/* tell caller nothing was written */
1123 	return B_IO_ERROR;
1124 }
1125