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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.de> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | extern struct sr_dev_driver ikalogic_scanalogic2_driver_info; | |
24 | ||
25 | extern uint64_t sl2_samplerates[NUM_SAMPLERATES]; | |
26 | ||
27 | static void stop_acquisition(struct sr_dev_inst *sdi) | |
28 | { | |
29 | struct drv_context *drvc = sdi->driver->context; | |
30 | struct dev_context *devc; | |
31 | struct sr_datafeed_packet packet; | |
32 | ||
33 | devc = sdi->priv; | |
34 | ||
35 | /* Remove USB file descriptors from polling. */ | |
36 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
37 | ||
38 | packet.type = SR_DF_END; | |
39 | sr_session_send(devc->cb_data, &packet); | |
40 | ||
41 | sdi->status = SR_ST_ACTIVE; | |
42 | } | |
43 | ||
44 | static void abort_acquisition(struct sr_dev_inst *sdi) | |
45 | { | |
46 | struct drv_context *drvc = sdi->driver->context; | |
47 | struct dev_context *devc; | |
48 | struct sr_datafeed_packet packet; | |
49 | ||
50 | devc = sdi->priv; | |
51 | ||
52 | /* Remove USB file descriptors from polling. */ | |
53 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
54 | ||
55 | packet.type = SR_DF_END; | |
56 | sr_session_send(devc->cb_data, &packet); | |
57 | ||
58 | sdi->driver->dev_close(sdi); | |
59 | } | |
60 | ||
61 | static void buffer_sample_data(const struct sr_dev_inst *sdi) | |
62 | { | |
63 | struct dev_context *devc; | |
64 | unsigned int offset, packet_length; | |
65 | ||
66 | devc = sdi->priv; | |
67 | ||
68 | if (devc->channels[devc->channel]->enabled) { | |
69 | offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES; | |
70 | ||
71 | /* | |
72 | * Determine the packet length to ensure that the last packet | |
73 | * will not exceed the buffer size. | |
74 | */ | |
75 | packet_length = MIN(PACKET_NUM_SAMPLE_BYTES, | |
76 | MAX_DEV_SAMPLE_BYTES - offset); | |
77 | ||
78 | /* | |
79 | * Skip the first 4 bytes of the source buffer because they | |
80 | * contain channel and packet information only. | |
81 | */ | |
82 | memcpy(devc->sample_buffer[devc->channel] + offset, | |
83 | devc->xfer_data_in + 4, packet_length); | |
84 | } | |
85 | } | |
86 | ||
87 | static void process_sample_data(const struct sr_dev_inst *sdi) | |
88 | { | |
89 | struct dev_context *devc; | |
90 | struct sr_datafeed_packet packet; | |
91 | struct sr_datafeed_logic logic; | |
92 | uint8_t i, j, tmp, buffer[PACKET_NUM_SAMPLES], *ptr[NUM_CHANNELS]; | |
93 | uint16_t offset, n = 0; | |
94 | int8_t k; | |
95 | ||
96 | devc = sdi->priv; | |
97 | offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES; | |
98 | ||
99 | /* | |
100 | * Array of pointers to the sample data of all channels up to the last | |
101 | * enabled one for an uniform access to them. Note that the currently | |
102 | * received samples always belong to the last enabled channel. | |
103 | */ | |
104 | for (i = 0; i < devc->num_enabled_channels - 1; i++) | |
105 | ptr[i] = devc->sample_buffer[devc->channel_map[i]] + offset; | |
106 | ||
107 | /* | |
108 | * Skip the first 4 bytes of the buffer because they contain channel | |
109 | * and packet information only. | |
110 | */ | |
111 | ptr[i] = devc->xfer_data_in + 4; | |
112 | ||
113 | for (i = 0; i < PACKET_NUM_SAMPLE_BYTES; i++) { | |
114 | /* Stop processing if all requested samples are processed. */ | |
115 | if (devc->samples_processed == devc->limit_samples) | |
116 | break; | |
117 | ||
118 | k = 7; | |
119 | ||
120 | if (devc->samples_processed == 0) { | |
121 | /* | |
122 | * Adjust the position of the first sample to be | |
123 | * processed because possibly more samples than | |
124 | * necessary might have been acquired. This is because | |
125 | * the number of acquired samples is always rounded up | |
126 | * to a multiple of 8. | |
127 | */ | |
128 | k = k - (devc->pre_trigger_bytes * 8) + | |
129 | devc->pre_trigger_samples; | |
130 | ||
131 | sr_dbg("Start processing at sample: %d.", 7 - k); | |
132 | ||
133 | /* | |
134 | * Send the trigger before the first sample is | |
135 | * processed if no pre trigger samples were calculated | |
136 | * through the capture ratio. | |
137 | */ | |
138 | if (devc->trigger_type != TRIGGER_TYPE_NONE && | |
139 | devc->pre_trigger_samples == 0) { | |
140 | packet.type = SR_DF_TRIGGER; | |
141 | sr_session_send(devc->cb_data, &packet); | |
142 | } | |
143 | } | |
144 | ||
145 | for (; k >= 0; k--) { | |
146 | /* | |
147 | * Stop processing if all requested samples are | |
148 | * processed. | |
149 | */ | |
150 | if (devc->samples_processed == devc->limit_samples) | |
151 | break; | |
152 | ||
153 | buffer[n] = 0; | |
154 | ||
155 | /* | |
156 | * Extract the current sample for each enabled channel | |
157 | * and store them in the buffer. | |
158 | */ | |
159 | for (j = 0; j < devc->num_enabled_channels; j++) { | |
160 | tmp = (ptr[j][i] & (1 << k)) >> k; | |
161 | buffer[n] |= tmp << devc->channel_map[j]; | |
162 | } | |
163 | ||
164 | n++; | |
165 | devc->samples_processed++; | |
166 | ||
167 | /* | |
168 | * Send all processed samples and the trigger if the | |
169 | * number of processed samples reaches the calculated | |
170 | * number of pre trigger samples. | |
171 | */ | |
172 | if (devc->samples_processed == devc->pre_trigger_samples && | |
173 | devc->trigger_type != TRIGGER_TYPE_NONE) { | |
174 | packet.type = SR_DF_LOGIC; | |
175 | packet.payload = &logic; | |
176 | logic.length = n; | |
177 | logic.unitsize = 1; | |
178 | logic.data = buffer; | |
179 | sr_session_send(devc->cb_data, &packet); | |
180 | ||
181 | packet.type = SR_DF_TRIGGER; | |
182 | sr_session_send(devc->cb_data, &packet); | |
183 | ||
184 | n = 0; | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | if (n > 0) { | |
190 | packet.type = SR_DF_LOGIC; | |
191 | packet.payload = &logic; | |
192 | logic.length = n; | |
193 | logic.unitsize = 1; | |
194 | logic.data = buffer; | |
195 | sr_session_send(devc->cb_data, &packet); | |
196 | } | |
197 | } | |
198 | ||
199 | SR_PRIV int ikalogic_scanalogic2_receive_data(int fd, int revents, void *cb_data) | |
200 | { | |
201 | struct sr_dev_inst *sdi; | |
202 | struct sr_dev_driver *di; | |
203 | struct dev_context *devc; | |
204 | struct drv_context *drvc; | |
205 | struct timeval tv; | |
206 | int64_t current_time, time_elapsed; | |
207 | int ret = 0; | |
208 | ||
209 | (void)fd; | |
210 | (void)revents; | |
211 | ||
212 | if (!(sdi = cb_data)) | |
213 | return TRUE; | |
214 | ||
215 | if (!(devc = sdi->priv)) | |
216 | return TRUE; | |
217 | ||
218 | di = sdi->driver; | |
219 | drvc = di->context; | |
220 | current_time = g_get_monotonic_time(); | |
221 | ||
222 | if (devc->state == STATE_WAIT_DATA_READY && | |
223 | !devc->wait_data_ready_locked) { | |
224 | time_elapsed = current_time - devc->wait_data_ready_time; | |
225 | ||
226 | /* | |
227 | * Check here for stopping in addition to the transfer | |
228 | * callback functions to avoid waiting until the | |
229 | * WAIT_DATA_READY_INTERVAL has expired. | |
230 | */ | |
231 | if (sdi->status == SR_ST_STOPPING) { | |
232 | if (!devc->stopping_in_progress) { | |
233 | devc->next_state = STATE_RESET_AND_IDLE; | |
234 | devc->stopping_in_progress = TRUE; | |
235 | ret = libusb_submit_transfer(devc->xfer_in); | |
236 | } | |
237 | } else if (time_elapsed >= WAIT_DATA_READY_INTERVAL) { | |
238 | devc->wait_data_ready_locked = TRUE; | |
239 | ret = libusb_submit_transfer(devc->xfer_in); | |
240 | } | |
241 | } | |
242 | ||
243 | if (ret != 0) { | |
244 | sr_err("Submit transfer failed: %s.", libusb_error_name(ret)); | |
245 | abort_acquisition(sdi); | |
246 | return TRUE; | |
247 | } | |
248 | ||
249 | tv.tv_sec = 0; | |
250 | tv.tv_usec = 0; | |
251 | ||
252 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
253 | NULL); | |
254 | ||
255 | /* Check if an error occurred on a transfer. */ | |
256 | if (devc->transfer_error) | |
257 | abort_acquisition(sdi); | |
258 | ||
259 | return TRUE; | |
260 | } | |
261 | ||
262 | SR_PRIV void LIBUSB_CALL sl2_receive_transfer_in( struct libusb_transfer *transfer) | |
263 | { | |
264 | struct sr_dev_inst *sdi; | |
265 | struct dev_context *devc; | |
266 | uint8_t last_channel; | |
267 | int ret = 0; | |
268 | ||
269 | sdi = transfer->user_data; | |
270 | devc = sdi->priv; | |
271 | ||
272 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { | |
273 | sr_err("Transfer to device failed: %i.", transfer->status); | |
274 | devc->transfer_error = TRUE; | |
275 | return; | |
276 | } | |
277 | ||
278 | if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) { | |
279 | devc->next_state = STATE_RESET_AND_IDLE; | |
280 | devc->stopping_in_progress = TRUE; | |
281 | ||
282 | if (libusb_submit_transfer(devc->xfer_in) != 0) { | |
283 | sr_err("Submit transfer failed: %s.", | |
284 | libusb_error_name(ret)); | |
285 | devc->transfer_error = TRUE; | |
286 | } | |
287 | ||
288 | return; | |
289 | } | |
290 | ||
291 | if (devc->state != devc->next_state) | |
292 | sr_spew("State changed from %i to %i.", | |
293 | devc->state, devc->next_state); | |
294 | devc->state = devc->next_state; | |
295 | ||
296 | if (devc->state == STATE_WAIT_DATA_READY) { | |
297 | /* Check if the received data are a valid device status. */ | |
298 | if (devc->xfer_data_in[0] == 0x05) { | |
299 | if (devc->xfer_data_in[1] == STATUS_WAITING_FOR_TRIGGER) | |
300 | sr_dbg("Waiting for trigger."); | |
301 | else if (devc->xfer_data_in[1] == STATUS_SAMPLING) | |
302 | sr_dbg("Sampling in progress."); | |
303 | } | |
304 | ||
305 | /* | |
306 | * Check if the received data are a valid device status and the | |
307 | * sample data are ready. | |
308 | */ | |
309 | if (devc->xfer_data_in[0] == 0x05 && | |
310 | devc->xfer_data_in[1] == STATUS_DATA_READY) { | |
311 | devc->next_state = STATE_RECEIVE_DATA; | |
312 | ret = libusb_submit_transfer(transfer); | |
313 | } else { | |
314 | devc->wait_data_ready_locked = FALSE; | |
315 | devc->wait_data_ready_time = g_get_monotonic_time(); | |
316 | } | |
317 | } else if (devc->state == STATE_RECEIVE_DATA) { | |
318 | last_channel = devc->channel_map[devc->num_enabled_channels - 1]; | |
319 | ||
320 | if (devc->channel < last_channel) { | |
321 | buffer_sample_data(sdi); | |
322 | } else if (devc->channel == last_channel) { | |
323 | process_sample_data(sdi); | |
324 | } else { | |
325 | /* | |
326 | * Stop acquisition because all samples of enabled | |
327 | * channels are processed. | |
328 | */ | |
329 | devc->next_state = STATE_RESET_AND_IDLE; | |
330 | } | |
331 | ||
332 | devc->sample_packet++; | |
333 | devc->sample_packet %= devc->num_sample_packets; | |
334 | ||
335 | if (devc->sample_packet == 0) | |
336 | devc->channel++; | |
337 | ||
338 | ret = libusb_submit_transfer(transfer); | |
339 | } else if (devc->state == STATE_RESET_AND_IDLE) { | |
340 | /* Check if the received data are a valid device status. */ | |
341 | if (devc->xfer_data_in[0] == 0x05) { | |
342 | if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) { | |
343 | devc->next_state = STATE_IDLE; | |
344 | devc->xfer_data_out[0] = CMD_IDLE; | |
345 | } else { | |
346 | devc->next_state = STATE_WAIT_DEVICE_READY; | |
347 | devc->xfer_data_out[0] = CMD_RESET; | |
348 | } | |
349 | ||
350 | ret = libusb_submit_transfer(devc->xfer_out); | |
351 | } else { | |
352 | /* | |
353 | * The received device status is invalid which | |
354 | * indicates that the device is not ready to accept | |
355 | * commands. Request a new device status until a valid | |
356 | * device status is received. | |
357 | */ | |
358 | ret = libusb_submit_transfer(transfer); | |
359 | } | |
360 | } else if (devc->state == STATE_WAIT_DEVICE_READY) { | |
361 | /* Check if the received data are a valid device status. */ | |
362 | if (devc->xfer_data_in[0] == 0x05) { | |
363 | if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) { | |
364 | devc->next_state = STATE_IDLE; | |
365 | devc->xfer_data_out[0] = CMD_IDLE; | |
366 | } else { | |
367 | /* | |
368 | * The received device status is valid but the | |
369 | * device is not ready. Probably the device did | |
370 | * not recognize the last reset. Reset the | |
371 | * device again. | |
372 | */ | |
373 | devc->xfer_data_out[0] = CMD_RESET; | |
374 | } | |
375 | ||
376 | ret = libusb_submit_transfer(devc->xfer_out); | |
377 | } else { | |
378 | /* | |
379 | * The device is not ready and therefore not able to | |
380 | * change to the idle state. Request a new device | |
381 | * status until the device is ready. | |
382 | */ | |
383 | ret = libusb_submit_transfer(transfer); | |
384 | } | |
385 | } | |
386 | ||
387 | if (ret != 0) { | |
388 | sr_err("Submit transfer failed: %s.", libusb_error_name(ret)); | |
389 | devc->transfer_error = TRUE; | |
390 | } | |
391 | } | |
392 | ||
393 | SR_PRIV void LIBUSB_CALL sl2_receive_transfer_out( struct libusb_transfer *transfer) | |
394 | { | |
395 | struct sr_dev_inst *sdi; | |
396 | struct dev_context *devc; | |
397 | int ret = 0; | |
398 | ||
399 | sdi = transfer->user_data; | |
400 | devc = sdi->priv; | |
401 | ||
402 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { | |
403 | sr_err("Transfer to device failed: %i.", transfer->status); | |
404 | devc->transfer_error = TRUE; | |
405 | return; | |
406 | } | |
407 | ||
408 | if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) { | |
409 | devc->next_state = STATE_RESET_AND_IDLE; | |
410 | devc->stopping_in_progress = TRUE; | |
411 | ||
412 | if (libusb_submit_transfer(devc->xfer_in) != 0) { | |
413 | sr_err("Submit transfer failed: %s.", | |
414 | libusb_error_name(ret)); | |
415 | ||
416 | devc->transfer_error = TRUE; | |
417 | } | |
418 | ||
419 | return; | |
420 | } | |
421 | ||
422 | if (devc->state != devc->next_state) | |
423 | sr_spew("State changed from %i to %i.", | |
424 | devc->state, devc->next_state); | |
425 | devc->state = devc->next_state; | |
426 | ||
427 | if (devc->state == STATE_IDLE) { | |
428 | stop_acquisition(sdi); | |
429 | } else if (devc->state == STATE_SAMPLE) { | |
430 | devc->next_state = STATE_WAIT_DATA_READY; | |
431 | ret = libusb_submit_transfer(devc->xfer_in); | |
432 | } else if (devc->state == STATE_WAIT_DEVICE_READY) { | |
433 | ret = libusb_submit_transfer(devc->xfer_in); | |
434 | } | |
435 | ||
436 | if (ret != 0) { | |
437 | sr_err("Submit transfer failed: %s.", libusb_error_name(ret)); | |
438 | devc->transfer_error = TRUE; | |
439 | } | |
440 | } | |
441 | ||
442 | SR_PRIV int sl2_set_samplerate(const struct sr_dev_inst *sdi, | |
443 | uint64_t samplerate) | |
444 | { | |
445 | struct dev_context *devc; | |
446 | unsigned int i; | |
447 | ||
448 | devc = sdi->priv; | |
449 | ||
450 | for (i = 0; i < NUM_SAMPLERATES; i++) { | |
451 | if (sl2_samplerates[i] == samplerate) { | |
452 | devc->samplerate = samplerate; | |
453 | devc->samplerate_id = NUM_SAMPLERATES - i - 1; | |
454 | return SR_OK; | |
455 | } | |
456 | } | |
457 | ||
458 | return SR_ERR_ARG; | |
459 | } | |
460 | ||
461 | SR_PRIV int sl2_set_limit_samples(const struct sr_dev_inst *sdi, | |
462 | uint64_t limit_samples) | |
463 | { | |
464 | struct dev_context *devc; | |
465 | ||
466 | devc = sdi->priv; | |
467 | ||
468 | if (limit_samples == 0) { | |
469 | sr_err("Invalid number of limit samples: %" PRIu64 ".", | |
470 | limit_samples); | |
471 | return SR_ERR_ARG; | |
472 | } | |
473 | ||
474 | if (limit_samples > MAX_SAMPLES) | |
475 | limit_samples = MAX_SAMPLES; | |
476 | ||
477 | sr_dbg("Limit samples set to %" PRIu64 ".", limit_samples); | |
478 | ||
479 | devc->limit_samples = limit_samples; | |
480 | ||
481 | return SR_OK; | |
482 | } | |
483 | ||
484 | SR_PRIV int sl2_convert_trigger(const struct sr_dev_inst *sdi) | |
485 | { | |
486 | struct dev_context *devc; | |
487 | struct sr_trigger *trigger; | |
488 | struct sr_trigger_stage *stage; | |
489 | struct sr_trigger_match *match; | |
490 | const GSList *l, *m; | |
491 | int num_triggers_anyedge; | |
492 | ||
493 | devc = sdi->priv; | |
494 | ||
495 | /* Disable the trigger by default. */ | |
496 | devc->trigger_channel = TRIGGER_CHANNEL_0; | |
497 | devc->trigger_type = TRIGGER_TYPE_NONE; | |
498 | ||
499 | if (!(trigger = sr_session_trigger_get(sdi->session))) | |
500 | return SR_OK; | |
501 | ||
502 | if (g_slist_length(trigger->stages) > 1) { | |
503 | sr_err("This device only supports 1 trigger stage."); | |
504 | return SR_ERR; | |
505 | } | |
506 | ||
507 | num_triggers_anyedge = 0; | |
508 | for (l = trigger->stages; l; l = l->next) { | |
509 | stage = l->data; | |
510 | for (m = stage->matches; m; m = m->next) { | |
511 | match = m->data; | |
512 | if (!match->channel->enabled) | |
513 | /* Ignore disabled channels with a trigger. */ | |
514 | continue; | |
515 | devc->trigger_channel = match->channel->index + 1; | |
516 | switch (match->match) { | |
517 | case SR_TRIGGER_RISING: | |
518 | devc->trigger_type = TRIGGER_TYPE_POSEDGE; | |
519 | break; | |
520 | case SR_TRIGGER_FALLING: | |
521 | devc->trigger_type = TRIGGER_TYPE_NEGEDGE; | |
522 | break; | |
523 | case SR_TRIGGER_EDGE: | |
524 | devc->trigger_type = TRIGGER_TYPE_ANYEDGE; | |
525 | num_triggers_anyedge++; | |
526 | break; | |
527 | } | |
528 | } | |
529 | } | |
530 | ||
531 | /* | |
532 | * Set trigger to any edge on all channels if the trigger for each | |
533 | * channel is set to any edge. | |
534 | */ | |
535 | if (num_triggers_anyedge == NUM_CHANNELS) { | |
536 | devc->trigger_channel = TRIGGER_CHANNEL_ALL; | |
537 | devc->trigger_type = TRIGGER_TYPE_ANYEDGE; | |
538 | } | |
539 | ||
540 | sr_dbg("Trigger set to channel 0x%02x and type 0x%02x.", | |
541 | devc->trigger_channel, devc->trigger_type); | |
542 | ||
543 | return SR_OK; | |
544 | } | |
545 | ||
546 | SR_PRIV int sl2_set_capture_ratio(const struct sr_dev_inst *sdi, | |
547 | uint64_t capture_ratio) | |
548 | { | |
549 | struct dev_context *devc; | |
550 | ||
551 | devc = sdi->priv; | |
552 | ||
553 | if (capture_ratio > 100) { | |
554 | sr_err("Invalid capture ratio: %" PRIu64 " %%.", capture_ratio); | |
555 | return SR_ERR_ARG; | |
556 | } | |
557 | ||
558 | sr_info("Capture ratio set to %" PRIu64 " %%.", capture_ratio); | |
559 | ||
560 | devc->capture_ratio = capture_ratio; | |
561 | ||
562 | return SR_OK; | |
563 | } | |
564 | ||
565 | SR_PRIV int sl2_set_after_trigger_delay(const struct sr_dev_inst *sdi, | |
566 | uint64_t after_trigger_delay) | |
567 | { | |
568 | struct dev_context *devc; | |
569 | ||
570 | devc = sdi->priv; | |
571 | ||
572 | if (after_trigger_delay > MAX_AFTER_TRIGGER_DELAY) { | |
573 | sr_err("Invalid after trigger delay: %" PRIu64 " ms.", | |
574 | after_trigger_delay); | |
575 | return SR_ERR_ARG; | |
576 | } | |
577 | ||
578 | sr_info("After trigger delay set to %" PRIu64 " ms.", | |
579 | after_trigger_delay); | |
580 | ||
581 | devc->after_trigger_delay = after_trigger_delay; | |
582 | ||
583 | return SR_OK; | |
584 | } | |
585 | ||
586 | SR_PRIV void sl2_calculate_trigger_samples(const struct sr_dev_inst *sdi) | |
587 | { | |
588 | struct dev_context *devc; | |
589 | uint64_t pre_trigger_samples, post_trigger_samples; | |
590 | uint16_t pre_trigger_bytes, post_trigger_bytes; | |
591 | uint8_t cr; | |
592 | ||
593 | devc = sdi->priv; | |
594 | cr = devc->capture_ratio; | |
595 | ||
596 | /* Ignore the capture ratio if no trigger is enabled. */ | |
597 | if (devc->trigger_type == TRIGGER_TYPE_NONE) | |
598 | cr = 0; | |
599 | ||
600 | pre_trigger_samples = (devc->limit_samples * cr) / 100; | |
601 | post_trigger_samples = (devc->limit_samples * (100 - cr)) / 100; | |
602 | ||
603 | /* | |
604 | * Increase the number of post trigger samples by one to compensate the | |
605 | * possible loss of a sample through integer rounding. | |
606 | */ | |
607 | if (pre_trigger_samples + post_trigger_samples != devc->limit_samples) | |
608 | post_trigger_samples++; | |
609 | ||
610 | /* | |
611 | * The device requires the number of samples in multiples of 8 which | |
612 | * will also be called sample bytes in the following. | |
613 | */ | |
614 | pre_trigger_bytes = pre_trigger_samples / 8; | |
615 | post_trigger_bytes = post_trigger_samples / 8; | |
616 | ||
617 | /* | |
618 | * Round up the number of sample bytes to ensure that at least the | |
619 | * requested number of samples will be acquired. Note that due to this | |
620 | * rounding the buffer to store these sample bytes needs to be at least | |
621 | * one sample byte larger than the minimal number of sample bytes | |
622 | * needed to store the requested samples. | |
623 | */ | |
624 | if (pre_trigger_samples % 8 != 0) | |
625 | pre_trigger_bytes++; | |
626 | ||
627 | if (post_trigger_samples % 8 != 0) | |
628 | post_trigger_bytes++; | |
629 | ||
630 | sr_info("Pre trigger samples: %" PRIu64 ".", pre_trigger_samples); | |
631 | sr_info("Post trigger samples: %" PRIu64 ".", post_trigger_samples); | |
632 | sr_dbg("Pre trigger sample bytes: %" PRIu16 ".", pre_trigger_bytes); | |
633 | sr_dbg("Post trigger sample bytes: %" PRIu16 ".", post_trigger_bytes); | |
634 | ||
635 | devc->pre_trigger_samples = pre_trigger_samples; | |
636 | devc->pre_trigger_bytes = pre_trigger_bytes; | |
637 | devc->post_trigger_bytes = post_trigger_bytes; | |
638 | } | |
639 | ||
640 | SR_PRIV int sl2_get_device_info(struct sr_usb_dev_inst usb, | |
641 | struct device_info *dev_info) | |
642 | { | |
643 | struct drv_context *drvc; | |
644 | uint8_t buffer[PACKET_LENGTH]; | |
645 | int ret; | |
646 | ||
647 | drvc = ikalogic_scanalogic2_driver_info.context; | |
648 | ||
649 | if (!dev_info) | |
650 | return SR_ERR_ARG; | |
651 | ||
652 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, &usb) != SR_OK) | |
653 | return SR_ERR; | |
654 | ||
655 | /* | |
656 | * Determine if a kernel driver is active on this interface and, if so, | |
657 | * detach it. | |
658 | */ | |
659 | if (libusb_kernel_driver_active(usb.devhdl, USB_INTERFACE) == 1) { | |
660 | ret = libusb_detach_kernel_driver(usb.devhdl, | |
661 | USB_INTERFACE); | |
662 | ||
663 | if (ret < 0) { | |
664 | sr_err("Failed to detach kernel driver: %s.", | |
665 | libusb_error_name(ret)); | |
666 | libusb_close(usb.devhdl); | |
667 | return SR_ERR; | |
668 | } | |
669 | } | |
670 | ||
671 | ret = libusb_claim_interface(usb.devhdl, USB_INTERFACE); | |
672 | ||
673 | if (ret) { | |
674 | sr_err("Failed to claim interface: %s.", | |
675 | libusb_error_name(ret)); | |
676 | libusb_close(usb.devhdl); | |
677 | return SR_ERR; | |
678 | } | |
679 | ||
680 | memset(buffer, 0, sizeof(buffer)); | |
681 | ||
682 | /* | |
683 | * Reset the device to ensure it is in a proper state to request the | |
684 | * device information. | |
685 | */ | |
686 | buffer[0] = CMD_RESET; | |
687 | if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) { | |
688 | sr_err("Resetting of device failed: %s.", | |
689 | libusb_error_name(ret)); | |
690 | libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
691 | libusb_close(usb.devhdl); | |
692 | return SR_ERR; | |
693 | } | |
694 | ||
695 | buffer[0] = CMD_INFO; | |
696 | if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) { | |
697 | sr_err("Requesting of device information failed: %s.", | |
698 | libusb_error_name(ret)); | |
699 | libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
700 | libusb_close(usb.devhdl); | |
701 | return SR_ERR; | |
702 | } | |
703 | ||
704 | if ((ret = sl2_transfer_in(usb.devhdl, buffer)) != PACKET_LENGTH) { | |
705 | sr_err("Receiving of device information failed: %s.", | |
706 | libusb_error_name(ret)); | |
707 | libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
708 | libusb_close(usb.devhdl); | |
709 | return SR_ERR; | |
710 | } | |
711 | ||
712 | memcpy(&(dev_info->serial), buffer + 1, sizeof(uint32_t)); | |
713 | dev_info->serial = GUINT32_FROM_LE(dev_info->serial); | |
714 | ||
715 | dev_info->fw_ver_major = buffer[5]; | |
716 | dev_info->fw_ver_minor = buffer[6]; | |
717 | ||
718 | buffer[0] = CMD_RESET; | |
719 | if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) { | |
720 | sr_err("Device reset failed: %s.", libusb_error_name(ret)); | |
721 | libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
722 | libusb_close(usb.devhdl); | |
723 | return SR_ERR; | |
724 | } | |
725 | ||
726 | /* | |
727 | * Set the device to idle state. If the device is not in idle state it | |
728 | * possibly will reset itself after a few seconds without being used | |
729 | * and thereby close the connection. | |
730 | */ | |
731 | buffer[0] = CMD_IDLE; | |
732 | if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) { | |
733 | sr_err("Failed to set device in idle state: %s.", | |
734 | libusb_error_name(ret)); | |
735 | libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
736 | libusb_close(usb.devhdl); | |
737 | return SR_ERR; | |
738 | } | |
739 | ||
740 | ret = libusb_release_interface(usb.devhdl, USB_INTERFACE); | |
741 | ||
742 | if (ret < 0) { | |
743 | sr_err("Failed to release interface: %s.", | |
744 | libusb_error_name(ret)); | |
745 | libusb_close(usb.devhdl); | |
746 | return SR_ERR; | |
747 | } | |
748 | ||
749 | libusb_close(usb.devhdl); | |
750 | ||
751 | return SR_OK; | |
752 | } | |
753 | ||
754 | SR_PRIV int sl2_transfer_in(libusb_device_handle *dev_handle, uint8_t *data) | |
755 | { | |
756 | return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_IN, | |
757 | USB_HID_GET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE, | |
758 | (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT_MS); | |
759 | } | |
760 | ||
761 | SR_PRIV int sl2_transfer_out(libusb_device_handle *dev_handle, uint8_t *data) | |
762 | { | |
763 | return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_OUT, | |
764 | USB_HID_SET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE, | |
765 | (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT_MS); | |
766 | } |