1 // SPDX-License-Identifier: GPL-2.0-only
3 * tascam-stream.c - a part of driver for TASCAM FireWire series
5 * Copyright (c) 2015 Takashi Sakamoto
8 #include <linux/delay.h>
11 #define CALLBACK_TIMEOUT 500
13 static int get_clock(struct snd_tscm *tscm, u32 *data)
18 err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST,
19 TSCM_ADDR_BASE + TSCM_OFFSET_CLOCK_STATUS,
20 ®, sizeof(reg), 0);
22 *data = be32_to_cpu(reg);
27 static int set_clock(struct snd_tscm *tscm, unsigned int rate,
28 enum snd_tscm_clock clock)
34 err = get_clock(tscm, &data);
42 if ((rate % 44100) == 0) {
45 if (rate / 44100 == 2)
47 } else if ((rate % 48000) == 0) {
50 if (rate / 48000 == 2)
57 if (clock != INT_MAX) {
62 reg = cpu_to_be32(data);
64 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
65 TSCM_ADDR_BASE + TSCM_OFFSET_CLOCK_STATUS,
66 ®, sizeof(reg), 0);
70 if (data & 0x00008000)
71 reg = cpu_to_be32(0x0000001a);
73 reg = cpu_to_be32(0x0000000d);
75 return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
76 TSCM_ADDR_BASE + TSCM_OFFSET_MULTIPLEX_MODE,
77 ®, sizeof(reg), 0);
80 int snd_tscm_stream_get_rate(struct snd_tscm *tscm, unsigned int *rate)
83 unsigned int trials = 0;
86 while (data == 0x0 || trials++ < 5) {
87 err = get_clock(tscm, &data);
91 data = (data & 0xff000000) >> 24;
94 /* Check base rate. */
95 if ((data & 0x0f) == 0x01)
97 else if ((data & 0x0f) == 0x02)
102 /* Check multiplier. */
103 if ((data & 0xf0) == 0x80)
105 else if ((data & 0xf0) != 0x00)
111 int snd_tscm_stream_get_clock(struct snd_tscm *tscm, enum snd_tscm_clock *clock)
116 err = get_clock(tscm, &data);
120 *clock = ((data & 0x00ff0000) >> 16) - 1;
121 if (*clock < 0 || *clock > SND_TSCM_CLOCK_ADAT)
127 static int enable_data_channels(struct snd_tscm *tscm)
135 for (i = 0; i < tscm->spec->pcm_capture_analog_channels; ++i)
137 if (tscm->spec->has_adat)
139 if (tscm->spec->has_spdif)
142 reg = cpu_to_be32(data);
143 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
144 TSCM_ADDR_BASE + TSCM_OFFSET_TX_PCM_CHANNELS,
145 ®, sizeof(reg), 0);
150 for (i = 0; i < tscm->spec->pcm_playback_analog_channels; ++i)
152 if (tscm->spec->has_adat)
154 if (tscm->spec->has_spdif)
157 reg = cpu_to_be32(data);
158 return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
159 TSCM_ADDR_BASE + TSCM_OFFSET_RX_PCM_CHANNELS,
160 ®, sizeof(reg), 0);
163 static int set_stream_formats(struct snd_tscm *tscm, unsigned int rate)
168 // Set an option for unknown purpose.
169 reg = cpu_to_be32(0x00200000);
170 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
171 TSCM_ADDR_BASE + TSCM_OFFSET_SET_OPTION,
172 ®, sizeof(reg), 0);
176 return enable_data_channels(tscm);
179 static void finish_session(struct snd_tscm *tscm)
183 amdtp_stream_stop(&tscm->rx_stream);
184 amdtp_stream_stop(&tscm->tx_stream);
187 snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
188 TSCM_ADDR_BASE + TSCM_OFFSET_START_STREAMING,
189 ®, sizeof(reg), 0);
192 snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
193 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_ON,
194 ®, sizeof(reg), 0);
196 // Unregister channels.
197 reg = cpu_to_be32(0x00000000);
198 snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
199 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_CH,
200 ®, sizeof(reg), 0);
201 reg = cpu_to_be32(0x00000000);
202 snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
203 TSCM_ADDR_BASE + TSCM_OFFSET_UNKNOWN,
204 ®, sizeof(reg), 0);
205 reg = cpu_to_be32(0x00000000);
206 snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
207 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_CH,
208 ®, sizeof(reg), 0);
211 static int begin_session(struct snd_tscm *tscm)
216 // Register the isochronous channel for transmitting stream.
217 reg = cpu_to_be32(tscm->tx_resources.channel);
218 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
219 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_CH,
220 ®, sizeof(reg), 0);
225 reg = cpu_to_be32(0x00000002);
226 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
227 TSCM_ADDR_BASE + TSCM_OFFSET_UNKNOWN,
228 ®, sizeof(reg), 0);
232 // Register the isochronous channel for receiving stream.
233 reg = cpu_to_be32(tscm->rx_resources.channel);
234 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
235 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_CH,
236 ®, sizeof(reg), 0);
240 reg = cpu_to_be32(0x00000001);
241 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
242 TSCM_ADDR_BASE + TSCM_OFFSET_START_STREAMING,
243 ®, sizeof(reg), 0);
247 reg = cpu_to_be32(0x00000001);
248 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
249 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_ON,
250 ®, sizeof(reg), 0);
254 // Set an option for unknown purpose.
255 reg = cpu_to_be32(0x00002000);
256 err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
257 TSCM_ADDR_BASE + TSCM_OFFSET_SET_OPTION,
258 ®, sizeof(reg), 0);
262 // Start multiplexing PCM samples on packets.
263 reg = cpu_to_be32(0x00000001);
264 return snd_fw_transaction(tscm->unit,
265 TCODE_WRITE_QUADLET_REQUEST,
266 TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_ON,
267 ®, sizeof(reg), 0);
270 static int keep_resources(struct snd_tscm *tscm, unsigned int rate,
271 struct amdtp_stream *stream)
273 struct fw_iso_resources *resources;
276 if (stream == &tscm->tx_stream)
277 resources = &tscm->tx_resources;
279 resources = &tscm->rx_resources;
281 err = amdtp_tscm_set_parameters(stream, rate);
285 return fw_iso_resources_allocate(resources,
286 amdtp_stream_get_max_payload(stream),
287 fw_parent_device(tscm->unit)->max_speed);
290 int snd_tscm_stream_init_duplex(struct snd_tscm *tscm)
292 unsigned int pcm_channels;
295 /* For out-stream. */
296 err = fw_iso_resources_init(&tscm->rx_resources, tscm->unit);
299 pcm_channels = tscm->spec->pcm_playback_analog_channels;
300 if (tscm->spec->has_adat)
302 if (tscm->spec->has_spdif)
304 err = amdtp_tscm_init(&tscm->rx_stream, tscm->unit, AMDTP_OUT_STREAM,
310 err = fw_iso_resources_init(&tscm->tx_resources, tscm->unit);
313 pcm_channels = tscm->spec->pcm_capture_analog_channels;
314 if (tscm->spec->has_adat)
316 if (tscm->spec->has_spdif)
318 err = amdtp_tscm_init(&tscm->tx_stream, tscm->unit, AMDTP_IN_STREAM,
321 amdtp_stream_destroy(&tscm->rx_stream);
326 // At bus reset, streaming is stopped and some registers are clear.
327 void snd_tscm_stream_update_duplex(struct snd_tscm *tscm)
329 amdtp_stream_pcm_abort(&tscm->tx_stream);
330 amdtp_stream_stop(&tscm->tx_stream);
332 amdtp_stream_pcm_abort(&tscm->rx_stream);
333 amdtp_stream_stop(&tscm->rx_stream);
337 * This function should be called before starting streams or after stopping
340 void snd_tscm_stream_destroy_duplex(struct snd_tscm *tscm)
342 amdtp_stream_destroy(&tscm->rx_stream);
343 amdtp_stream_destroy(&tscm->tx_stream);
345 fw_iso_resources_destroy(&tscm->rx_resources);
346 fw_iso_resources_destroy(&tscm->tx_resources);
349 int snd_tscm_stream_reserve_duplex(struct snd_tscm *tscm, unsigned int rate)
351 unsigned int curr_rate;
354 err = snd_tscm_stream_get_rate(tscm, &curr_rate);
358 if (tscm->substreams_counter == 0 || rate != curr_rate) {
359 finish_session(tscm);
361 fw_iso_resources_free(&tscm->tx_resources);
362 fw_iso_resources_free(&tscm->rx_resources);
364 err = set_clock(tscm, rate, INT_MAX);
368 err = keep_resources(tscm, rate, &tscm->tx_stream);
372 err = keep_resources(tscm, rate, &tscm->rx_stream);
374 fw_iso_resources_free(&tscm->tx_resources);
382 int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate)
384 unsigned int generation = tscm->rx_resources.generation;
387 if (tscm->substreams_counter == 0)
390 if (amdtp_streaming_error(&tscm->rx_stream) ||
391 amdtp_streaming_error(&tscm->tx_stream))
392 finish_session(tscm);
394 if (generation != fw_parent_device(tscm->unit)->card->generation) {
395 err = fw_iso_resources_update(&tscm->tx_resources);
399 err = fw_iso_resources_update(&tscm->rx_resources);
404 if (!amdtp_stream_running(&tscm->rx_stream)) {
405 err = set_stream_formats(tscm, rate);
409 err = begin_session(tscm);
413 err = amdtp_stream_start(&tscm->rx_stream,
414 tscm->rx_resources.channel,
415 fw_parent_device(tscm->unit)->max_speed);
419 if (!amdtp_stream_wait_callback(&tscm->rx_stream,
426 if (!amdtp_stream_running(&tscm->tx_stream)) {
427 err = amdtp_stream_start(&tscm->tx_stream,
428 tscm->tx_resources.channel,
429 fw_parent_device(tscm->unit)->max_speed);
433 if (!amdtp_stream_wait_callback(&tscm->tx_stream,
442 finish_session(tscm);
447 void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm)
449 if (tscm->substreams_counter == 0) {
450 finish_session(tscm);
452 fw_iso_resources_free(&tscm->tx_resources);
453 fw_iso_resources_free(&tscm->rx_resources);
457 void snd_tscm_stream_lock_changed(struct snd_tscm *tscm)
459 tscm->dev_lock_changed = true;
460 wake_up(&tscm->hwdep_wait);
463 int snd_tscm_stream_lock_try(struct snd_tscm *tscm)
467 spin_lock_irq(&tscm->lock);
469 /* user land lock this */
470 if (tscm->dev_lock_count < 0) {
475 /* this is the first time */
476 if (tscm->dev_lock_count++ == 0)
477 snd_tscm_stream_lock_changed(tscm);
480 spin_unlock_irq(&tscm->lock);
484 void snd_tscm_stream_lock_release(struct snd_tscm *tscm)
486 spin_lock_irq(&tscm->lock);
488 if (WARN_ON(tscm->dev_lock_count <= 0))
490 if (--tscm->dev_lock_count == 0)
491 snd_tscm_stream_lock_changed(tscm);
493 spin_unlock_irq(&tscm->lock);