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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2016 Andreas Zschunke <andreas.zschunke@gmx.net> | |
5 | * Copyright (C) 2017 Andrej Valek <andy@skyrain.eu> | |
6 | * Copyright (C) 2017 Uwe Hermann <uwe@hermann-uwe.de> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include <config.h> | |
23 | #include "protocol.h" | |
24 | ||
25 | #define H4032L_USB_TIMEOUT 500 | |
26 | ||
27 | enum h4032l_cmd { | |
28 | CMD_RESET = 0x00b3, /* Also arms the logic analyzer. */ | |
29 | CMD_CONFIGURE = 0x2b1a, | |
30 | CMD_STATUS = 0x4b3a, | |
31 | CMD_GET = 0x6b5a | |
32 | }; | |
33 | ||
34 | struct h4032l_status_packet { | |
35 | uint32_t magic; | |
36 | uint32_t values; | |
37 | uint32_t status; | |
38 | uint32_t usbxi_data; | |
39 | uint32_t fpga_version; | |
40 | }; | |
41 | ||
42 | static void abort_acquisition(struct dev_context *devc) | |
43 | { | |
44 | int i; | |
45 | ||
46 | devc->acq_aborted = TRUE; | |
47 | ||
48 | for (i = devc->num_transfers - 1; i >= 0; i--) { | |
49 | if (devc->transfers[i]) | |
50 | libusb_cancel_transfer(devc->transfers[i]); | |
51 | } | |
52 | ||
53 | devc->status = H4032L_STATUS_IDLE; | |
54 | } | |
55 | ||
56 | static void finish_acquisition(struct sr_dev_inst *sdi) | |
57 | { | |
58 | struct dev_context *devc = sdi->priv; | |
59 | struct drv_context *drvc = sdi->driver->context; | |
60 | ||
61 | std_session_send_df_end(sdi); | |
62 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
63 | ||
64 | devc->num_transfers = 0; | |
65 | g_free(devc->transfers); | |
66 | } | |
67 | ||
68 | static void free_transfer(struct libusb_transfer *transfer) | |
69 | { | |
70 | struct sr_dev_inst *sdi = transfer->user_data; | |
71 | struct dev_context *devc = sdi->priv; | |
72 | unsigned int i; | |
73 | ||
74 | if ((transfer->buffer != (unsigned char *)&devc->cmd_pkt) && | |
75 | (transfer->buffer != devc->buf)) { | |
76 | g_free(transfer->buffer); | |
77 | } | |
78 | ||
79 | transfer->buffer = NULL; | |
80 | libusb_free_transfer(transfer); | |
81 | ||
82 | for (i = 0; i < devc->num_transfers; i++) { | |
83 | if (devc->transfers[i] == transfer) { | |
84 | devc->transfers[i] = NULL; | |
85 | break; | |
86 | } | |
87 | } | |
88 | ||
89 | if (--devc->submitted_transfers == 0) | |
90 | finish_acquisition(sdi); | |
91 | } | |
92 | ||
93 | static void resubmit_transfer(struct libusb_transfer *transfer) | |
94 | { | |
95 | int ret; | |
96 | ||
97 | if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS) | |
98 | return; | |
99 | ||
100 | sr_err("%s: %s", __func__, libusb_error_name(ret)); | |
101 | free_transfer(transfer); | |
102 | } | |
103 | ||
104 | static void send_data(struct sr_dev_inst *sdi, | |
105 | uint32_t *data, size_t sample_count) | |
106 | { | |
107 | struct dev_context *devc = sdi->priv; | |
108 | struct sr_datafeed_logic logic = { | |
109 | .length = sample_count * sizeof(uint32_t), | |
110 | .unitsize = sizeof(uint32_t), | |
111 | .data = data | |
112 | }; | |
113 | const struct sr_datafeed_packet packet = { | |
114 | .type = SR_DF_LOGIC, | |
115 | .payload = &logic | |
116 | }; | |
117 | const struct sr_datafeed_packet trig = { | |
118 | .type = SR_DF_TRIGGER, | |
119 | .payload = NULL | |
120 | }; | |
121 | size_t trigger_offset; | |
122 | ||
123 | if (devc->trigger_pos >= devc->sent_samples && | |
124 | devc->trigger_pos < (devc->sent_samples + sample_count)) { | |
125 | /* Get trigger position. */ | |
126 | trigger_offset = devc->trigger_pos - devc->sent_samples; | |
127 | logic.length = trigger_offset * sizeof(uint32_t); | |
128 | if (logic.length) | |
129 | sr_session_send(sdi, &packet); | |
130 | ||
131 | /* Send trigger position. */ | |
132 | sr_session_send(sdi, &trig); | |
133 | ||
134 | /* Send rest of data. */ | |
135 | logic.length = (sample_count-trigger_offset) * sizeof(uint32_t); | |
136 | logic.data = data + trigger_offset; | |
137 | if (logic.length) | |
138 | sr_session_send(sdi, &packet); | |
139 | } else { | |
140 | sr_session_send(sdi, &packet); | |
141 | } | |
142 | ||
143 | devc->sent_samples += sample_count; | |
144 | } | |
145 | ||
146 | SR_PRIV int h4032l_receive_data(int fd, int revents, void *cb_data) | |
147 | { | |
148 | struct timeval tv; | |
149 | struct drv_context *drvc; | |
150 | ||
151 | (void)fd; | |
152 | (void)revents; | |
153 | ||
154 | drvc = (struct drv_context *)cb_data; | |
155 | ||
156 | tv.tv_sec = tv.tv_usec = 0; | |
157 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
158 | ||
159 | return TRUE; | |
160 | } | |
161 | ||
162 | void LIBUSB_CALL h4032l_data_transfer_callback(struct libusb_transfer *transfer) | |
163 | { | |
164 | struct sr_dev_inst *const sdi = transfer->user_data; | |
165 | struct dev_context *const devc = sdi->priv; | |
166 | uint32_t max_samples = transfer->actual_length / sizeof(uint32_t); | |
167 | uint32_t *buf; | |
168 | uint32_t num_samples; | |
169 | ||
170 | /* | |
171 | * If acquisition has already ended, just free any queued up | |
172 | * transfer that come in. | |
173 | */ | |
174 | if (devc->acq_aborted) { | |
175 | free_transfer(transfer); | |
176 | return; | |
177 | } | |
178 | ||
179 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) | |
180 | sr_dbg("%s error: %d.", __func__, transfer->status); | |
181 | ||
182 | /* Cancel pending transfers. */ | |
183 | if (transfer->actual_length == 0) { | |
184 | resubmit_transfer(transfer); | |
185 | return; | |
186 | } | |
187 | ||
188 | buf = (uint32_t *)transfer->buffer; | |
189 | ||
190 | num_samples = MIN(devc->remaining_samples, max_samples); | |
191 | devc->remaining_samples -= num_samples; | |
192 | send_data(sdi, buf, num_samples); | |
193 | sr_dbg("Remaining: %d %08X %08X.", devc->remaining_samples, | |
194 | buf[0], buf[1]); | |
195 | ||
196 | /* Close data receiving. */ | |
197 | if (devc->remaining_samples == 0) { | |
198 | if (buf[num_samples] != H4032L_END_PACKET_MAGIC) | |
199 | sr_err("Mismatch magic number of end poll."); | |
200 | ||
201 | abort_acquisition(devc); | |
202 | free_transfer(transfer); | |
203 | } else { | |
204 | if (((devc->submitted_transfers - 1) * H4032L_DATA_BUFFER_SIZE) < | |
205 | (int32_t)(devc->remaining_samples * sizeof(uint32_t))) | |
206 | resubmit_transfer(transfer); | |
207 | else | |
208 | free_transfer(transfer); | |
209 | } | |
210 | } | |
211 | ||
212 | void LIBUSB_CALL h4032l_usb_callback(struct libusb_transfer *transfer) | |
213 | { | |
214 | struct sr_dev_inst *const sdi = transfer->user_data; | |
215 | struct dev_context *const devc = sdi->priv; | |
216 | struct sr_usb_dev_inst *usb = sdi->conn; | |
217 | gboolean cmd = FALSE; | |
218 | uint32_t max_samples = transfer->actual_length / sizeof(uint32_t); | |
219 | uint32_t *buf; | |
220 | struct h4032l_status_packet *status; | |
221 | uint32_t num_samples; | |
222 | int ret; | |
223 | ||
224 | /* | |
225 | * If acquisition has already ended, just free any queued up | |
226 | * transfers that come in. | |
227 | */ | |
228 | if (devc->acq_aborted) { | |
229 | free_transfer(transfer); | |
230 | return; | |
231 | } | |
232 | ||
233 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) | |
234 | sr_dbg("%s error: %d.", __func__, transfer->status); | |
235 | ||
236 | buf = (uint32_t *)transfer->buffer; | |
237 | ||
238 | switch (devc->status) { | |
239 | case H4032L_STATUS_IDLE: | |
240 | sr_err("USB callback called in idle."); | |
241 | break; | |
242 | case H4032L_STATUS_CMD_CONFIGURE: | |
243 | /* Select status request as next. */ | |
244 | cmd = TRUE; | |
245 | devc->cmd_pkt.cmd = CMD_STATUS; | |
246 | devc->status = H4032L_STATUS_CMD_STATUS; | |
247 | break; | |
248 | case H4032L_STATUS_CMD_STATUS: | |
249 | /* Select status request as next. */ | |
250 | devc->status = H4032L_STATUS_RESPONSE_STATUS; | |
251 | break; | |
252 | case H4032L_STATUS_RESPONSE_STATUS: | |
253 | /* | |
254 | * Check magic and if status is complete, then select | |
255 | * First Transfer as next. | |
256 | */ | |
257 | status = (struct h4032l_status_packet *)transfer->buffer; | |
258 | if (status->magic != H4032L_STATUS_PACKET_MAGIC) | |
259 | devc->status = H4032L_STATUS_RESPONSE_STATUS; | |
260 | else if (status->status == 2) | |
261 | devc->status = H4032L_STATUS_RESPONSE_STATUS_CONTINUE; | |
262 | else | |
263 | devc->status = H4032L_STATUS_RESPONSE_STATUS_RETRY; | |
264 | break; | |
265 | case H4032L_STATUS_RESPONSE_STATUS_RETRY: | |
266 | devc->status = H4032L_STATUS_CMD_STATUS; | |
267 | devc->cmd_pkt.cmd = CMD_STATUS; | |
268 | cmd = TRUE; | |
269 | break; | |
270 | case H4032L_STATUS_RESPONSE_STATUS_CONTINUE: | |
271 | devc->status = H4032L_STATUS_CMD_GET; | |
272 | devc->cmd_pkt.cmd = CMD_GET; | |
273 | cmd = TRUE; | |
274 | break; | |
275 | case H4032L_STATUS_CMD_GET: | |
276 | devc->status = H4032L_STATUS_FIRST_TRANSFER; | |
277 | /* Trigger has been captured. */ | |
278 | std_session_send_df_header(sdi); | |
279 | break; | |
280 | case H4032L_STATUS_FIRST_TRANSFER: | |
281 | /* Drop packets until H4032L_START_PACKET_MAGIC. */ | |
282 | if (buf[0] != H4032L_START_PACKET_MAGIC) { | |
283 | sr_dbg("Mismatch magic number of start poll."); | |
284 | break; | |
285 | } | |
286 | devc->status = H4032L_STATUS_TRANSFER; | |
287 | max_samples--; | |
288 | buf++; | |
289 | /* Fallthrough. */ | |
290 | case H4032L_STATUS_TRANSFER: | |
291 | num_samples = MIN(devc->remaining_samples, max_samples); | |
292 | devc->remaining_samples -= num_samples; | |
293 | send_data(sdi, buf, num_samples); | |
294 | sr_dbg("Remaining: %d %08X %08X.", devc->remaining_samples, | |
295 | buf[0], buf[1]); | |
296 | break; | |
297 | } | |
298 | ||
299 | /* Start data receiving. */ | |
300 | if (devc->status == H4032L_STATUS_TRANSFER) { | |
301 | if ((ret = h4032l_start_data_transfers(sdi)) != SR_OK) { | |
302 | sr_err("Can not start data transfers: %d", ret); | |
303 | devc->status = H4032L_STATUS_IDLE; | |
304 | } | |
305 | } else if (devc->status != H4032L_STATUS_IDLE) { | |
306 | if (cmd) { | |
307 | /* Setup new USB cmd packet, reuse transfer object. */ | |
308 | sr_dbg("New command: %d.", devc->status); | |
309 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
310 | 2 | LIBUSB_ENDPOINT_OUT, | |
311 | (unsigned char *)&devc->cmd_pkt, | |
312 | sizeof(struct h4032l_cmd_pkt), | |
313 | h4032l_usb_callback, | |
314 | (void *)sdi, H4032L_USB_TIMEOUT); | |
315 | } else { | |
316 | /* Setup new USB poll packet, reuse transfer object. */ | |
317 | sr_dbg("Poll: %d.", devc->status); | |
318 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
319 | 6 | LIBUSB_ENDPOINT_IN, | |
320 | devc->buf, ARRAY_SIZE(devc->buf), | |
321 | h4032l_usb_callback, | |
322 | (void *)sdi, H4032L_USB_TIMEOUT); | |
323 | } | |
324 | /* Send prepared USB packet. */ | |
325 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
326 | sr_err("Failed to submit transfer: %s.", | |
327 | libusb_error_name(ret)); | |
328 | devc->status = H4032L_STATUS_IDLE; | |
329 | } | |
330 | } else { | |
331 | sr_dbg("Now idle."); | |
332 | } | |
333 | ||
334 | if (devc->status == H4032L_STATUS_IDLE) | |
335 | free_transfer(transfer); | |
336 | } | |
337 | ||
338 | uint16_t h4032l_voltage2pwm(double voltage) | |
339 | { | |
340 | /* | |
341 | * word PwmA - channel A Vref PWM value, pseudocode: | |
342 | * -6V < ThresholdVoltage < +6V | |
343 | * Vref = 1.8 - ThresholdVoltage | |
344 | * if Vref > 10.0 | |
345 | * Vref = 10.0 | |
346 | * if Vref < -5.0 | |
347 | * Vref = -5.0 | |
348 | * pwm = ToInt((Vref + 5.0) / 15.0 * 4096.0) | |
349 | * if pwm > 4095 | |
350 | * pwm = 4095 | |
351 | */ | |
352 | voltage = 1.8 - voltage; | |
353 | if (voltage > 10.0) | |
354 | voltage = 10.0; | |
355 | else if (voltage < -5.0) | |
356 | voltage = -5.0; | |
357 | ||
358 | return (uint16_t) ((voltage + 5.0) * (4096.0 / 15.0)); | |
359 | } | |
360 | ||
361 | SR_PRIV int h4032l_start_data_transfers(const struct sr_dev_inst *sdi) | |
362 | { | |
363 | struct dev_context *devc = sdi->priv; | |
364 | struct sr_usb_dev_inst *usb = sdi->conn; | |
365 | struct libusb_transfer *transfer; | |
366 | uint8_t *buf; | |
367 | unsigned int num_transfers; | |
368 | unsigned int i; | |
369 | int ret; | |
370 | ||
371 | devc->submitted_transfers = 0; | |
372 | ||
373 | /* | |
374 | * Set number of data transfers regarding to size of buffer. | |
375 | * FPGA version 0 can't transfer multiple transfers at once. | |
376 | */ | |
377 | if ((num_transfers = MIN(devc->remaining_samples * sizeof(uint32_t) / | |
378 | H4032L_DATA_BUFFER_SIZE, devc->fpga_version ? | |
379 | H4032L_DATA_TRANSFER_MAX_NUM : 1)) == 0) | |
380 | num_transfers = 1; | |
381 | ||
382 | g_free(devc->transfers); | |
383 | devc->transfers = g_malloc(sizeof(*devc->transfers) * num_transfers); | |
384 | devc->num_transfers = num_transfers; | |
385 | ||
386 | for (i = 0; i < num_transfers; i++) { | |
387 | buf = g_malloc(H4032L_DATA_BUFFER_SIZE); | |
388 | transfer = libusb_alloc_transfer(0); | |
389 | ||
390 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
391 | 6 | LIBUSB_ENDPOINT_IN, | |
392 | buf, H4032L_DATA_BUFFER_SIZE, | |
393 | h4032l_data_transfer_callback, | |
394 | (void *)sdi, H4032L_USB_TIMEOUT); | |
395 | ||
396 | /* Send prepared usb packet. */ | |
397 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
398 | sr_err("Failed to submit transfer: %s.", | |
399 | libusb_error_name(ret)); | |
400 | libusb_free_transfer(transfer); | |
401 | g_free(buf); | |
402 | abort_acquisition(devc); | |
403 | return SR_ERR; | |
404 | } | |
405 | devc->transfers[i] = transfer; | |
406 | devc->submitted_transfers++; | |
407 | } | |
408 | ||
409 | return SR_OK; | |
410 | } | |
411 | ||
412 | SR_PRIV int h4032l_start(const struct sr_dev_inst *sdi) | |
413 | { | |
414 | struct dev_context *devc = sdi->priv; | |
415 | struct sr_usb_dev_inst *usb = sdi->conn; | |
416 | struct libusb_transfer *transfer; | |
417 | unsigned char buf[] = {0x0f, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
418 | int ret; | |
419 | ||
420 | /* Send reset command to arm the logic analyzer. */ | |
421 | if ((ret = libusb_control_transfer(usb->devhdl, | |
422 | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, CMD_RESET, | |
423 | 0x00, 0x00, buf, ARRAY_SIZE(buf), H4032L_USB_TIMEOUT)) < 0) { | |
424 | sr_err("Failed to send vendor request %s.", | |
425 | libusb_error_name(ret)); | |
426 | return SR_ERR; | |
427 | } | |
428 | ||
429 | /* Wait for reset vendor request. */ | |
430 | g_usleep(20 * 1000); | |
431 | ||
432 | /* Send configure command. */ | |
433 | devc->cmd_pkt.cmd = CMD_CONFIGURE; | |
434 | devc->status = H4032L_STATUS_CMD_CONFIGURE; | |
435 | devc->remaining_samples = devc->cmd_pkt.sample_size; | |
436 | ||
437 | transfer = libusb_alloc_transfer(0); | |
438 | ||
439 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
440 | 2 | LIBUSB_ENDPOINT_OUT, (unsigned char *)&devc->cmd_pkt, | |
441 | sizeof(struct h4032l_cmd_pkt), h4032l_usb_callback, | |
442 | (void *)sdi, H4032L_USB_TIMEOUT); | |
443 | ||
444 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
445 | sr_err("Failed to submit transfer: %s.", | |
446 | libusb_error_name(ret)); | |
447 | libusb_free_transfer(transfer); | |
448 | return SR_ERR; | |
449 | } | |
450 | ||
451 | devc->transfers = g_malloc0(sizeof(*devc->transfers)); | |
452 | devc->submitted_transfers++; | |
453 | devc->num_transfers = 1; | |
454 | devc->transfers[0] = transfer; | |
455 | ||
456 | return SR_OK; | |
457 | } | |
458 | ||
459 | SR_PRIV int h4032l_stop(struct sr_dev_inst *sdi) | |
460 | { | |
461 | abort_acquisition(sdi->priv); | |
462 | ||
463 | return SR_OK; | |
464 | } | |
465 | ||
466 | SR_PRIV int h4032l_dev_open(struct sr_dev_inst *sdi) | |
467 | { | |
468 | struct drv_context *drvc = sdi->driver->context; | |
469 | struct sr_usb_dev_inst *usb = sdi->conn; | |
470 | struct libusb_device_descriptor des; | |
471 | libusb_device **devlist; | |
472 | int ret = SR_ERR, i, device_count; | |
473 | char connection_id[64]; | |
474 | ||
475 | device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
476 | if (device_count < 0) { | |
477 | sr_err("Failed to get device list: %s.", | |
478 | libusb_error_name(device_count)); | |
479 | return SR_ERR; | |
480 | } | |
481 | ||
482 | for (i = 0; i < device_count; i++) { | |
483 | libusb_get_device_descriptor(devlist[i], &des); | |
484 | ||
485 | if (des.idVendor != H4032L_USB_VENDOR || | |
486 | des.idProduct != H4032L_USB_PRODUCT) | |
487 | continue; | |
488 | ||
489 | if ((sdi->status == SR_ST_INITIALIZING) || | |
490 | (sdi->status == SR_ST_INACTIVE)) { | |
491 | /* Check device by its physical USB bus/port address. */ | |
492 | if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0) | |
493 | continue; | |
494 | ||
495 | if (strcmp(sdi->connection_id, connection_id)) | |
496 | /* This is not the one. */ | |
497 | continue; | |
498 | } | |
499 | ||
500 | if (!(ret = libusb_open(devlist[i], &usb->devhdl))) { | |
501 | if (usb->address == 0xff) | |
502 | /* | |
503 | * First time we touch this device after FW | |
504 | * upload, so we don't know the address yet. | |
505 | */ | |
506 | usb->address = | |
507 | libusb_get_device_address(devlist[i]); | |
508 | } else { | |
509 | sr_err("Failed to open device: %s.", | |
510 | libusb_error_name(ret)); | |
511 | ret = SR_ERR; | |
512 | break; | |
513 | } | |
514 | ||
515 | ret = SR_OK; | |
516 | break; | |
517 | } | |
518 | ||
519 | libusb_free_device_list(devlist, 1); | |
520 | return ret; | |
521 | } | |
522 | ||
523 | SR_PRIV int h4032l_get_fpga_version(const struct sr_dev_inst *sdi) | |
524 | { | |
525 | struct dev_context *devc = sdi->priv; | |
526 | struct sr_usb_dev_inst *usb = sdi->conn; | |
527 | struct h4032l_status_packet *status; | |
528 | int transferred; | |
529 | int i, ret; | |
530 | ||
531 | /* Set command to status. */ | |
532 | devc->cmd_pkt.magic = H4032L_CMD_PKT_MAGIC; | |
533 | devc->cmd_pkt.cmd = CMD_STATUS; | |
534 | ||
535 | /* Send status request. */ | |
536 | if ((ret = libusb_bulk_transfer(usb->devhdl, | |
537 | 2 | LIBUSB_ENDPOINT_OUT, (unsigned char *)&devc->cmd_pkt, | |
538 | sizeof(struct h4032l_cmd_pkt), &transferred, H4032L_USB_TIMEOUT)) < 0) { | |
539 | sr_err("Unable to send FPGA version request: %s.", | |
540 | libusb_error_name(ret)); | |
541 | return SR_ERR; | |
542 | } | |
543 | ||
544 | /* Attempt to get FGPA version. */ | |
545 | for (i = 0; i < 10; i++) { | |
546 | if ((ret = libusb_bulk_transfer(usb->devhdl, | |
547 | 6 | LIBUSB_ENDPOINT_IN, devc->buf, | |
548 | ARRAY_SIZE(devc->buf), &transferred, H4032L_USB_TIMEOUT)) < 0) { | |
549 | sr_err("Unable to receive FPGA version: %s.", | |
550 | libusb_error_name(ret)); | |
551 | return SR_ERR; | |
552 | } | |
553 | status = (struct h4032l_status_packet *)devc->buf; | |
554 | if (status->magic == H4032L_STATUS_PACKET_MAGIC) { | |
555 | sr_dbg("FPGA version: 0x%x.", status->fpga_version); | |
556 | devc->fpga_version = status->fpga_version; | |
557 | return SR_OK; | |
558 | } | |
559 | } | |
560 | ||
561 | sr_err("Unable to get FPGA version."); | |
562 | ||
563 | return SR_ERR; | |
564 | } |