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