1 // SPDX-License-Identifier: GPL-2.0-only
3  * digi00x-stream.c - a part of driver for Digidesign Digi 002/003 family
5  * Copyright (c) 2014-2015 Takashi Sakamoto
36 	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,  in snd_dg00x_stream_get_local_rate()
46 		err = -EIO;  in snd_dg00x_stream_get_local_rate()
61 		return -EINVAL;  in snd_dg00x_stream_set_local_rate()
64 	return snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,  in snd_dg00x_stream_set_local_rate()
70 			       enum snd_dg00x_clock *clock)  in snd_dg00x_stream_get_clock()  argument
75 	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,  in snd_dg00x_stream_get_clock()
81 	*clock = be32_to_cpu(reg) & 0x0f;  in snd_dg00x_stream_get_clock()
82 	if (*clock >= SND_DG00X_CLOCK_COUNT)  in snd_dg00x_stream_get_clock()
83 		err = -EIO;  in snd_dg00x_stream_get_clock()
88 int snd_dg00x_stream_check_external_clock(struct snd_dg00x *dg00x, bool *detect)  in snd_dg00x_stream_check_external_clock()  argument
93 	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,  in snd_dg00x_stream_check_external_clock()
97 		*detect = be32_to_cpu(reg) > 0;  in snd_dg00x_stream_check_external_clock()
109 	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,  in snd_dg00x_stream_get_external_rate()
120 		err = -EBUSY;  in snd_dg00x_stream_get_external_rate()
130 	snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,  in finish_session()
136 	snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,  in finish_session()
152 	data = cpu_to_be32((dg00x->tx_resources.channel << 16) |  in begin_session()
153 			   dg00x->rx_resources.channel);  in begin_session()
154 	err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,  in begin_session()
160 	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,  in begin_session()
170 	curr--;  in begin_session()
173 		err = snd_fw_transaction(dg00x->unit,  in begin_session()
182 		curr--;  in begin_session()
201 		return -EINVAL;  in keep_resources()
203 	if (stream == &dg00x->tx_stream)  in keep_resources()
204 		resources = &dg00x->tx_resources;  in keep_resources()
206 		resources = &dg00x->rx_resources;  in keep_resources()
215 				fw_parent_device(dg00x->unit)->max_speed);  in keep_resources()
224 	if (s == &dg00x->tx_stream) {  in init_stream()
225 		resources = &dg00x->tx_resources;  in init_stream()
228 		resources = &dg00x->rx_resources;  in init_stream()
232 	err = fw_iso_resources_init(resources, dg00x->unit);  in init_stream()
236 	err = amdtp_dot_init(s, dg00x->unit, dir);  in init_stream()
247 	if (s == &dg00x->tx_stream)  in destroy_stream()
248 		fw_iso_resources_destroy(&dg00x->tx_resources);  in destroy_stream()
250 		fw_iso_resources_destroy(&dg00x->rx_resources);  in destroy_stream()
257 	err = init_stream(dg00x, &dg00x->rx_stream);  in snd_dg00x_stream_init_duplex()
261 	err = init_stream(dg00x, &dg00x->tx_stream);  in snd_dg00x_stream_init_duplex()
263 		destroy_stream(dg00x, &dg00x->rx_stream);  in snd_dg00x_stream_init_duplex()
267 	err = amdtp_domain_init(&dg00x->domain);  in snd_dg00x_stream_init_duplex()
269 		destroy_stream(dg00x, &dg00x->rx_stream);  in snd_dg00x_stream_init_duplex()
270 		destroy_stream(dg00x, &dg00x->tx_stream);  in snd_dg00x_stream_init_duplex()
282 	amdtp_domain_destroy(&dg00x->domain);  in snd_dg00x_stream_destroy_duplex()
284 	destroy_stream(dg00x, &dg00x->rx_stream);  in snd_dg00x_stream_destroy_duplex()
285 	destroy_stream(dg00x, &dg00x->tx_stream);  in snd_dg00x_stream_destroy_duplex()
301 	if (dg00x->substreams_counter == 0 || curr_rate != rate) {  in snd_dg00x_stream_reserve_duplex()
302 		amdtp_domain_stop(&dg00x->domain);  in snd_dg00x_stream_reserve_duplex()
306 		fw_iso_resources_free(&dg00x->tx_resources);  in snd_dg00x_stream_reserve_duplex()
307 		fw_iso_resources_free(&dg00x->rx_resources);  in snd_dg00x_stream_reserve_duplex()
313 		err = keep_resources(dg00x, &dg00x->rx_stream, rate);  in snd_dg00x_stream_reserve_duplex()
317 		err = keep_resources(dg00x, &dg00x->tx_stream, rate);  in snd_dg00x_stream_reserve_duplex()
319 			fw_iso_resources_free(&dg00x->rx_resources);  in snd_dg00x_stream_reserve_duplex()
323 		err = amdtp_domain_set_events_per_period(&dg00x->domain,  in snd_dg00x_stream_reserve_duplex()
326 			fw_iso_resources_free(&dg00x->rx_resources);  in snd_dg00x_stream_reserve_duplex()
327 			fw_iso_resources_free(&dg00x->tx_resources);  in snd_dg00x_stream_reserve_duplex()
337 	unsigned int generation = dg00x->rx_resources.generation;  in snd_dg00x_stream_start_duplex()
340 	if (dg00x->substreams_counter == 0)  in snd_dg00x_stream_start_duplex()
343 	if (amdtp_streaming_error(&dg00x->tx_stream) ||  in snd_dg00x_stream_start_duplex()
344 	    amdtp_streaming_error(&dg00x->rx_stream)) {  in snd_dg00x_stream_start_duplex()
345 		amdtp_domain_stop(&dg00x->domain);  in snd_dg00x_stream_start_duplex()
349 	if (generation != fw_parent_device(dg00x->unit)->card->generation) {  in snd_dg00x_stream_start_duplex()
350 		err = fw_iso_resources_update(&dg00x->tx_resources);  in snd_dg00x_stream_start_duplex()
352 			goto error;  in snd_dg00x_stream_start_duplex()
354 		err = fw_iso_resources_update(&dg00x->rx_resources);  in snd_dg00x_stream_start_duplex()
356 			goto error;  in snd_dg00x_stream_start_duplex()
361 	 * which source of clock is used.  in snd_dg00x_stream_start_duplex()
363 	if (!amdtp_stream_running(&dg00x->rx_stream)) {  in snd_dg00x_stream_start_duplex()
364 		int spd = fw_parent_device(dg00x->unit)->max_speed;  in snd_dg00x_stream_start_duplex()
368 			goto error;  in snd_dg00x_stream_start_duplex()
370 		err = amdtp_domain_add_stream(&dg00x->domain, &dg00x->rx_stream,  in snd_dg00x_stream_start_duplex()
371 					      dg00x->rx_resources.channel, spd);  in snd_dg00x_stream_start_duplex()
373 			goto error;  in snd_dg00x_stream_start_duplex()
375 		err = amdtp_domain_add_stream(&dg00x->domain, &dg00x->tx_stream,  in snd_dg00x_stream_start_duplex()
376 					      dg00x->tx_resources.channel, spd);  in snd_dg00x_stream_start_duplex()
378 			goto error;  in snd_dg00x_stream_start_duplex()
383 		// important for media clock recovery.  in snd_dg00x_stream_start_duplex()
384 		err = amdtp_domain_start(&dg00x->domain, 0, true, true);  in snd_dg00x_stream_start_duplex()
386 			goto error;  in snd_dg00x_stream_start_duplex()
388 		if (!amdtp_domain_wait_ready(&dg00x->domain, READY_TIMEOUT_MS)) {  in snd_dg00x_stream_start_duplex()
389 			err = -ETIMEDOUT;  in snd_dg00x_stream_start_duplex()
390 			goto error;  in snd_dg00x_stream_start_duplex()
395 error:  in snd_dg00x_stream_start_duplex()
396 	amdtp_domain_stop(&dg00x->domain);  in snd_dg00x_stream_start_duplex()
404 	if (dg00x->substreams_counter == 0) {  in snd_dg00x_stream_stop_duplex()
405 		amdtp_domain_stop(&dg00x->domain);  in snd_dg00x_stream_stop_duplex()
408 		fw_iso_resources_free(&dg00x->tx_resources);  in snd_dg00x_stream_stop_duplex()
409 		fw_iso_resources_free(&dg00x->rx_resources);  in snd_dg00x_stream_stop_duplex()
415 	fw_iso_resources_update(&dg00x->tx_resources);  in snd_dg00x_stream_update_duplex()
416 	fw_iso_resources_update(&dg00x->rx_resources);  in snd_dg00x_stream_update_duplex()
418 	amdtp_stream_update(&dg00x->tx_stream);  in snd_dg00x_stream_update_duplex()
419 	amdtp_stream_update(&dg00x->rx_stream);  in snd_dg00x_stream_update_duplex()
424 	dg00x->dev_lock_changed = true;  in snd_dg00x_stream_lock_changed()
425 	wake_up(&dg00x->hwdep_wait);  in snd_dg00x_stream_lock_changed()
432 	spin_lock_irq(&dg00x->lock);  in snd_dg00x_stream_lock_try()
435 	if (dg00x->dev_lock_count < 0) {  in snd_dg00x_stream_lock_try()
436 		err = -EBUSY;  in snd_dg00x_stream_lock_try()
441 	if (dg00x->dev_lock_count++ == 0)  in snd_dg00x_stream_lock_try()
445 	spin_unlock_irq(&dg00x->lock);  in snd_dg00x_stream_lock_try()
451 	spin_lock_irq(&dg00x->lock);  in snd_dg00x_stream_lock_release()
453 	if (WARN_ON(dg00x->dev_lock_count <= 0))  in snd_dg00x_stream_lock_release()
455 	if (--dg00x->dev_lock_count == 0)  in snd_dg00x_stream_lock_release()
458 	spin_unlock_irq(&dg00x->lock);  in snd_dg00x_stream_lock_release()