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drivers: use new sr_config struct
[libsigrok.git] / hardware / fx2lafw / fx2lafw.c
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1/*
2 * This file is part of the sigrok project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
6 *
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <inttypes.h>
25#include <libusb.h>
26#include "libsigrok.h"
27#include "libsigrok-internal.h"
28#include "fx2lafw.h"
29#include "command.h"
30
31static const struct fx2lafw_profile supported_fx2[] = {
32 /*
33 * CWAV USBee AX
34 * EE Electronics ESLA201A
35 * ARMFLY AX-Pro
36 */
37 { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
38 FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
39 0 },
40 /*
41 * CWAV USBee DX
42 * XZL-Studio DX
43 */
44 { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
45 FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
46 DEV_CAPS_16BIT },
47
48 /*
49 * CWAV USBee SX
50 */
51 { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
52 FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
53 0 },
54
55 /*
56 * Saleae Logic
57 * EE Electronics ESLA100
58 * Robomotic MiniLogic
59 * Robomotic BugLogic 3
60 */
61 { 0x0925, 0x3881, "Saleae", "Logic", NULL,
62 FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
63 0 },
64
65 /*
66 * Default Cypress FX2 without EEPROM, e.g.:
67 * Lcsoft Mini Board
68 * Braintechnology USB Interface V2.x
69 */
70 { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
71 FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
72 DEV_CAPS_16BIT },
73
74 /*
75 * Braintechnology USB-LPS
76 */
77 { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
78 FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
79 DEV_CAPS_16BIT },
80
81 { 0, 0, 0, 0, 0, 0, 0 }
82};
83
84static const int hwcaps[] = {
85 SR_HWCAP_LOGIC_ANALYZER,
86 SR_HWCAP_SAMPLERATE,
87
88 /* These are really implemented in the driver, not the hardware. */
89 SR_HWCAP_LIMIT_SAMPLES,
90 SR_HWCAP_CONTINUOUS,
91 0,
92};
93
94static const char *probe_names[] = {
95 "0", "1", "2", "3", "4", "5", "6", "7",
96 "8", "9", "10", "11", "12", "13", "14", "15",
97 NULL,
98};
99
100static const uint64_t supported_samplerates[] = {
101 SR_KHZ(20),
102 SR_KHZ(25),
103 SR_KHZ(50),
104 SR_KHZ(100),
105 SR_KHZ(200),
106 SR_KHZ(250),
107 SR_KHZ(500),
108 SR_MHZ(1),
109 SR_MHZ(2),
110 SR_MHZ(3),
111 SR_MHZ(4),
112 SR_MHZ(6),
113 SR_MHZ(8),
114 SR_MHZ(12),
115 SR_MHZ(16),
116 SR_MHZ(24),
117 0,
118};
119
120static const struct sr_samplerates samplerates = {
121 0,
122 0,
123 0,
124 supported_samplerates,
125};
126
127SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
128static struct sr_dev_driver *di = &fx2lafw_driver_info;
129static int hw_dev_close(struct sr_dev_inst *sdi);
130static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
131 const void *value);
132static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
133
134/**
135 * Check the USB configuration to determine if this is an fx2lafw device.
136 *
137 * @return TRUE if the device's configuration profile match fx2lafw
138 * configuration, FALSE otherwise.
139 */
140static gboolean check_conf_profile(libusb_device *dev)
141{
142 struct libusb_device_descriptor des;
143 struct libusb_device_handle *hdl;
144 gboolean ret;
145 unsigned char strdesc[64];
146
147 hdl = NULL;
148 ret = FALSE;
149 while (!ret) {
150 /* Assume the FW has not been loaded, unless proven wrong. */
151 if (libusb_get_device_descriptor(dev, &des) != 0)
152 break;
153
154 if (libusb_open(dev, &hdl) != 0)
155 break;
156
157 if (libusb_get_string_descriptor_ascii(hdl,
158 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
159 break;
160 if (strncmp((const char *)strdesc, "sigrok", 6))
161 break;
162
163 if (libusb_get_string_descriptor_ascii(hdl,
164 des.iProduct, strdesc, sizeof(strdesc)) < 0)
165 break;
166 if (strncmp((const char *)strdesc, "fx2lafw", 7))
167 break;
168
169 /* If we made it here, it must be an fx2lafw. */
170 ret = TRUE;
171 }
172 if (hdl)
173 libusb_close(hdl);
174
175 return ret;
176}
177
178static int fx2lafw_dev_open(struct sr_dev_inst *sdi)
179{
180 libusb_device **devlist;
181 struct libusb_device_descriptor des;
182 struct dev_context *devc;
183 struct drv_context *drvc;
184 struct version_info vi;
185 int ret, skip, i, device_count;
186 uint8_t revid;
187
188 drvc = di->priv;
189 devc = sdi->priv;
190
191 if (sdi->status == SR_ST_ACTIVE)
192 /* Device is already in use. */
193 return SR_ERR;
194
195 skip = 0;
196 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
197 if (device_count < 0) {
198 sr_err("Failed to get device list: %s.",
199 libusb_error_name(device_count));
200 return SR_ERR;
201 }
202
203 for (i = 0; i < device_count; i++) {
204 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
205 sr_err("Failed to get device descriptor: %s.",
206 libusb_error_name(ret));
207 continue;
208 }
209
210 if (des.idVendor != devc->profile->vid
211 || des.idProduct != devc->profile->pid)
212 continue;
213
214 if (sdi->status == SR_ST_INITIALIZING) {
215 if (skip != sdi->index) {
216 /* Skip devices of this type that aren't the one we want. */
217 skip += 1;
218 continue;
219 }
220 } else if (sdi->status == SR_ST_INACTIVE) {
221 /*
222 * This device is fully enumerated, so we need to find
223 * this device by vendor, product, bus and address.
224 */
225 if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
226 || libusb_get_device_address(devlist[i]) != devc->usb->address)
227 /* This is not the one. */
228 continue;
229 }
230
231 if (!(ret = libusb_open(devlist[i], &devc->usb->devhdl))) {
232 if (devc->usb->address == 0xff)
233 /*
234 * First time we touch this device after FW
235 * upload, so we don't know the address yet.
236 */
237 devc->usb->address = libusb_get_device_address(devlist[i]);
238 } else {
239 sr_err("Failed to open device: %s.",
240 libusb_error_name(ret));
241 break;
242 }
243
244 ret = command_get_fw_version(devc->usb->devhdl, &vi);
245 if (ret != SR_OK) {
246 sr_err("Failed to get firmware version.");
247 break;
248 }
249
250 ret = command_get_revid_version(devc->usb->devhdl, &revid);
251 if (ret != SR_OK) {
252 sr_err("Failed to get REVID.");
253 break;
254 }
255
256 /*
257 * Changes in major version mean incompatible/API changes, so
258 * bail out if we encounter an incompatible version.
259 * Different minor versions are OK, they should be compatible.
260 */
261 if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) {
262 sr_err("Expected firmware version %d.x, "
263 "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
264 vi.major, vi.minor);
265 break;
266 }
267
268 sdi->status = SR_ST_ACTIVE;
269 sr_info("Opened device %d on %d.%d, "
270 "interface %d, firmware %d.%d.",
271 sdi->index, devc->usb->bus, devc->usb->address,
272 USB_INTERFACE, vi.major, vi.minor);
273
274 sr_info("Detected REVID=%d, it's a Cypress CY7C68013%s.",
275 revid, (revid != 1) ? " (FX2)" : "A (FX2LP)");
276
277 break;
278 }
279 libusb_free_device_list(devlist, 1);
280
281 if (sdi->status != SR_ST_ACTIVE)
282 return SR_ERR;
283
284 return SR_OK;
285}
286
287static int configure_probes(const struct sr_dev_inst *sdi)
288{
289 struct dev_context *devc;
290 struct sr_probe *probe;
291 GSList *l;
292 int probe_bit, stage, i;
293 char *tc;
294
295 devc = sdi->priv;
296 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
297 devc->trigger_mask[i] = 0;
298 devc->trigger_value[i] = 0;
299 }
300
301 stage = -1;
302 for (l = sdi->probes; l; l = l->next) {
303 probe = (struct sr_probe *)l->data;
304 if (probe->enabled == FALSE)
305 continue;
306
307 if (probe->index > 7)
308 devc->sample_wide = TRUE;
309
310 probe_bit = 1 << (probe->index);
311 if (!(probe->trigger))
312 continue;
313
314 stage = 0;
315 for (tc = probe->trigger; *tc; tc++) {
316 devc->trigger_mask[stage] |= probe_bit;
317 if (*tc == '1')
318 devc->trigger_value[stage] |= probe_bit;
319 stage++;
320 if (stage > NUM_TRIGGER_STAGES)
321 return SR_ERR;
322 }
323 }
324
325 if (stage == -1)
326 /*
327 * We didn't configure any triggers, make sure acquisition
328 * doesn't wait for any.
329 */
330 devc->trigger_stage = TRIGGER_FIRED;
331 else
332 devc->trigger_stage = 0;
333
334 return SR_OK;
335}
336
337static struct dev_context *fx2lafw_dev_new(void)
338{
339 struct dev_context *devc;
340
341 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
342 sr_err("Device context malloc failed.");
343 return NULL;
344 }
345
346 devc->trigger_stage = TRIGGER_FIRED;
347
348 return devc;
349}
350
351static int clear_instances(void)
352{
353 GSList *l;
354 struct sr_dev_inst *sdi;
355 struct drv_context *drvc;
356 struct dev_context *devc;
357 int ret;
358
359 drvc = di->priv;
360 ret = SR_OK;
361 for (l = drvc->instances; l; l = l->next) {
362 if (!(sdi = l->data)) {
363 /* Log error, but continue cleaning up the rest. */
364 sr_err("sdi was NULL, continuing.");
365 ret = SR_ERR_BUG;
366 continue;
367 }
368 if (!(devc = sdi->priv)) {
369 /* Log error, but continue cleaning up the rest. */
370 sr_err("sdi->priv was NULL, continuing.");
371 ret = SR_ERR_BUG;
372 continue;
373 }
374 hw_dev_close(sdi);
375 sr_usb_dev_inst_free(devc->usb);
376 sdi = l->data;
377 sr_dev_inst_free(sdi);
378 }
379
380 g_slist_free(drvc->instances);
381 drvc->instances = NULL;
382
383 return ret;
384}
385
386static int hw_init(struct sr_context *sr_ctx)
387{
388 struct drv_context *drvc;
389
390 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
391 sr_err("Driver context malloc failed.");
392 return SR_ERR_MALLOC;
393 }
394
395 drvc->sr_ctx = sr_ctx;
396 di->priv = drvc;
397
398 return SR_OK;
399}
400
401static GSList *hw_scan(GSList *options)
402{
403 GSList *devices;
404 struct libusb_device_descriptor des;
405 struct sr_dev_inst *sdi;
406 const struct fx2lafw_profile *prof;
407 struct drv_context *drvc;
408 struct dev_context *devc;
409 struct sr_probe *probe;
410 libusb_device **devlist;
411 int devcnt, num_logic_probes, ret, i, j;
412
413 (void)options;
414
415 drvc = di->priv;
416
417 /* This scan always invalidates any previous scans. */
418 clear_instances();
419
420 /* Find all fx2lafw compatible devices and upload firmware to them. */
421 devices = NULL;
422 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
423 for (i = 0; devlist[i]; i++) {
424
425 if ((ret = libusb_get_device_descriptor(
426 devlist[i], &des)) != 0) {
427 sr_warn("Failed to get device descriptor: %s.",
428 libusb_error_name(ret));
429 continue;
430 }
431
432 prof = NULL;
433 for (j = 0; supported_fx2[j].vid; j++) {
434 if (des.idVendor == supported_fx2[j].vid &&
435 des.idProduct == supported_fx2[j].pid) {
436 prof = &supported_fx2[j];
437 }
438 }
439
440 /* Skip if the device was not found. */
441 if (!prof)
442 continue;
443
444 devcnt = g_slist_length(drvc->instances);
445 sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
446 prof->vendor, prof->model, prof->model_version);
447 if (!sdi)
448 return NULL;
449 sdi->driver = di;
450
451 /* Fill in probelist according to this device's profile. */
452 num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
453 for (j = 0; j < num_logic_probes; j++) {
454 if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
455 probe_names[j])))
456 return NULL;
457 sdi->probes = g_slist_append(sdi->probes, probe);
458 }
459
460 devc = fx2lafw_dev_new();
461 devc->profile = prof;
462 sdi->priv = devc;
463 drvc->instances = g_slist_append(drvc->instances, sdi);
464 devices = g_slist_append(devices, sdi);
465
466 if (check_conf_profile(devlist[i])) {
467 /* Already has the firmware, so fix the new address. */
468 sr_dbg("Found an fx2lafw device.");
469 sdi->status = SR_ST_INACTIVE;
470 devc->usb = sr_usb_dev_inst_new
471 (libusb_get_bus_number(devlist[i]),
472 libusb_get_device_address(devlist[i]), NULL);
473 } else {
474 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
475 prof->firmware) == SR_OK)
476 /* Store when this device's FW was updated. */
477 devc->fw_updated = g_get_monotonic_time();
478 else
479 sr_err("Firmware upload failed for "
480 "device %d.", devcnt);
481 devc->usb = sr_usb_dev_inst_new
482 (libusb_get_bus_number(devlist[i]), 0xff, NULL);
483 }
484 }
485 libusb_free_device_list(devlist, 1);
486
487 return devices;
488}
489
490static GSList *hw_dev_list(void)
491{
492 struct drv_context *drvc;
493
494 drvc = di->priv;
495
496 return drvc->instances;
497}
498
499static int hw_dev_open(struct sr_dev_inst *sdi)
500{
501 struct dev_context *devc;
502 int ret;
503 int64_t timediff_us, timediff_ms;
504
505 devc = sdi->priv;
506
507 /*
508 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
509 * milliseconds for the FX2 to renumerate.
510 */
511 ret = SR_ERR;
512 if (devc->fw_updated > 0) {
513 sr_info("Waiting for device to reset.");
514 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
515 g_usleep(300 * 1000);
516 timediff_ms = 0;
517 while (timediff_ms < MAX_RENUM_DELAY_MS) {
518 if ((ret = fx2lafw_dev_open(sdi)) == SR_OK)
519 break;
520 g_usleep(100 * 1000);
521
522 timediff_us = g_get_monotonic_time() - devc->fw_updated;
523 timediff_ms = timediff_us / 1000;
524 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
525 }
526 if (ret != SR_OK) {
527 sr_err("Device failed to renumerate.");
528 return SR_ERR;
529 }
530 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
531 } else {
532 sr_info("Firmware upload was not needed.");
533 ret = fx2lafw_dev_open(sdi);
534 }
535
536 if (ret != SR_OK) {
537 sr_err("Unable to open device.");
538 return SR_ERR;
539 }
540
541 devc = sdi->priv;
542
543 ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
544 if (ret != 0) {
545 switch(ret) {
546 case LIBUSB_ERROR_BUSY:
547 sr_err("Unable to claim USB interface. Another "
548 "program or driver has already claimed it.");
549 break;
550 case LIBUSB_ERROR_NO_DEVICE:
551 sr_err("Device has been disconnected.");
552 break;
553 default:
554 sr_err("Unable to claim interface: %s.",
555 libusb_error_name(ret));
556 break;
557 }
558
559 return SR_ERR;
560 }
561
562 if (devc->cur_samplerate == 0) {
563 /* Samplerate hasn't been set; default to the slowest one. */
564 if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
565 &supported_samplerates[0]) == SR_ERR)
566 return SR_ERR;
567 }
568
569 return SR_OK;
570}
571
572static int hw_dev_close(struct sr_dev_inst *sdi)
573{
574 struct dev_context *devc;
575
576 devc = sdi->priv;
577 if (devc->usb->devhdl == NULL)
578 return SR_ERR;
579
580 sr_info("Closing device %d on %d.%d, interface %d.",
581 sdi->index, devc->usb->bus, devc->usb->address, USB_INTERFACE);
582 libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
583 libusb_close(devc->usb->devhdl);
584 devc->usb->devhdl = NULL;
585 sdi->status = SR_ST_INACTIVE;
586
587 return SR_OK;
588}
589
590static int hw_cleanup(void)
591{
592 struct drv_context *drvc;
593 int ret;
594
595 if (!(drvc = di->priv))
596 return SR_OK;
597
598 ret = clear_instances();
599
600 g_free(drvc);
601 di->priv = NULL;
602
603 return ret;
604}
605
606static int hw_info_get(int info_id, const void **data,
607 const struct sr_dev_inst *sdi)
608{
609 struct dev_context *devc;
610
611 switch (info_id) {
612 case SR_DI_HWCAPS:
613 *data = hwcaps;
614 break;
615 case SR_DI_SAMPLERATES:
616 *data = &samplerates;
617 break;
618 case SR_DI_TRIGGER_TYPES:
619 *data = TRIGGER_TYPES;
620 break;
621 case SR_DI_CUR_SAMPLERATE:
622 if (sdi) {
623 devc = sdi->priv;
624 *data = &devc->cur_samplerate;
625 } else
626 return SR_ERR;
627 break;
628 default:
629 return SR_ERR_ARG;
630 }
631
632 return SR_OK;
633}
634
635static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
636 const void *value)
637{
638 struct dev_context *devc;
639 int ret;
640
641 devc = sdi->priv;
642
643 if (hwcap == SR_HWCAP_SAMPLERATE) {
644 devc->cur_samplerate = *(const uint64_t *)value;
645 ret = SR_OK;
646 } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
647 devc->limit_samples = *(const uint64_t *)value;
648 ret = SR_OK;
649 } else {
650 ret = SR_ERR;
651 }
652
653 return ret;
654}
655
656static int receive_data(int fd, int revents, void *cb_data)
657{
658 struct timeval tv;
659 struct drv_context *drvc;
660
661 (void)fd;
662 (void)revents;
663 (void)cb_data;
664
665 drvc = di->priv;
666
667 tv.tv_sec = tv.tv_usec = 0;
668 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
669
670 return TRUE;
671}
672
673static void abort_acquisition(struct dev_context *devc)
674{
675 int i;
676
677 devc->num_samples = -1;
678
679 for (i = devc->num_transfers - 1; i >= 0; i--) {
680 if (devc->transfers[i])
681 libusb_cancel_transfer(devc->transfers[i]);
682 }
683}
684
685static void finish_acquisition(struct dev_context *devc)
686{
687 struct sr_datafeed_packet packet;
688 struct drv_context *drvc = di->priv;
689 const struct libusb_pollfd **lupfd;
690 int i;
691
692 /* Terminate session. */
693 packet.type = SR_DF_END;
694 sr_session_send(devc->session_dev_id, &packet);
695
696 /* Remove fds from polling. */
697 lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
698 for (i = 0; lupfd[i]; i++)
699 sr_source_remove(lupfd[i]->fd);
700 free(lupfd); /* NOT g_free()! */
701
702 devc->num_transfers = 0;
703 g_free(devc->transfers);
704}
705
706static void free_transfer(struct libusb_transfer *transfer)
707{
708 struct dev_context *devc;
709 unsigned int i;
710
711 devc = transfer->user_data;
712
713 g_free(transfer->buffer);
714 transfer->buffer = NULL;
715 libusb_free_transfer(transfer);
716
717 for (i = 0; i < devc->num_transfers; i++) {
718 if (devc->transfers[i] == transfer) {
719 devc->transfers[i] = NULL;
720 break;
721 }
722 }
723
724 devc->submitted_transfers--;
725 if (devc->submitted_transfers == 0)
726 finish_acquisition(devc);
727}
728
729static void resubmit_transfer(struct libusb_transfer *transfer)
730{
731 int ret;
732
733 if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS)
734 return;
735
736 free_transfer(transfer);
737 /* TODO: Stop session? */
738
739 sr_err("%s: %s", __func__, libusb_error_name(ret));
740}
741
742static void receive_transfer(struct libusb_transfer *transfer)
743{
744 gboolean packet_has_error = FALSE;
745 struct sr_datafeed_packet packet;
746 struct sr_datafeed_logic logic;
747 struct dev_context *devc;
748 int trigger_offset, i, sample_width, cur_sample_count;
749 int trigger_offset_bytes;
750 uint8_t *cur_buf;
751
752 devc = transfer->user_data;
753
754 /*
755 * If acquisition has already ended, just free any queued up
756 * transfer that come in.
757 */
758 if (devc->num_samples == -1) {
759 free_transfer(transfer);
760 return;
761 }
762
763 sr_info("receive_transfer(): status %d received %d bytes.",
764 transfer->status, transfer->actual_length);
765
766 /* Save incoming transfer before reusing the transfer struct. */
767 cur_buf = transfer->buffer;
768 sample_width = devc->sample_wide ? 2 : 1;
769 cur_sample_count = transfer->actual_length / sample_width;
770
771 switch (transfer->status) {
772 case LIBUSB_TRANSFER_NO_DEVICE:
773 abort_acquisition(devc);
774 free_transfer(transfer);
775 return;
776 case LIBUSB_TRANSFER_COMPLETED:
777 case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
778 break;
779 default:
780 packet_has_error = TRUE;
781 break;
782 }
783
784 if (transfer->actual_length == 0 || packet_has_error) {
785 devc->empty_transfer_count++;
786 if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
787 /*
788 * The FX2 gave up. End the acquisition, the frontend
789 * will work out that the samplecount is short.
790 */
791 abort_acquisition(devc);
792 free_transfer(transfer);
793 } else {
794 resubmit_transfer(transfer);
795 }
796 return;
797 } else {
798 devc->empty_transfer_count = 0;
799 }
800
801 trigger_offset = 0;
802 if (devc->trigger_stage >= 0) {
803 for (i = 0; i < cur_sample_count; i++) {
804
805 const uint16_t cur_sample = devc->sample_wide ?
806 *((const uint16_t*)cur_buf + i) :
807 *((const uint8_t*)cur_buf + i);
808
809 if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) ==
810 devc->trigger_value[devc->trigger_stage]) {
811 /* Match on this trigger stage. */
812 devc->trigger_buffer[devc->trigger_stage] = cur_sample;
813 devc->trigger_stage++;
814
815 if (devc->trigger_stage == NUM_TRIGGER_STAGES ||
816 devc->trigger_mask[devc->trigger_stage] == 0) {
817 /* Match on all trigger stages, we're done. */
818 trigger_offset = i + 1;
819
820 /*
821 * TODO: Send pre-trigger buffer to session bus.
822 * Tell the frontend we hit the trigger here.
823 */
824 packet.type = SR_DF_TRIGGER;
825 packet.payload = NULL;
826 sr_session_send(devc->session_dev_id, &packet);
827
828 /*
829 * Send the samples that triggered it,
830 * since we're skipping past them.
831 */
832 packet.type = SR_DF_LOGIC;
833 packet.payload = &logic;
834 logic.unitsize = sizeof(*devc->trigger_buffer);
835 logic.length = devc->trigger_stage * logic.unitsize;
836 logic.data = devc->trigger_buffer;
837 sr_session_send(devc->session_dev_id, &packet);
838
839 devc->trigger_stage = TRIGGER_FIRED;
840 break;
841 }
842 } else if (devc->trigger_stage > 0) {
843 /*
844 * We had a match before, but not in the next sample. However, we may
845 * have a match on this stage in the next bit -- trigger on 0001 will
846 * fail on seeing 00001, so we need to go back to stage 0 -- but at
847 * the next sample from the one that matched originally, which the
848 * counter increment at the end of the loop takes care of.
849 */
850 i -= devc->trigger_stage;
851 if (i < -1)
852 i = -1; /* Oops, went back past this buffer. */
853 /* Reset trigger stage. */
854 devc->trigger_stage = 0;
855 }
856 }
857 }
858
859 if (devc->trigger_stage == TRIGGER_FIRED) {
860 /* Send the incoming transfer to the session bus. */
861 trigger_offset_bytes = trigger_offset * sample_width;
862 packet.type = SR_DF_LOGIC;
863 packet.payload = &logic;
864 logic.length = transfer->actual_length - trigger_offset_bytes;
865 logic.unitsize = sample_width;
866 logic.data = cur_buf + trigger_offset_bytes;
867 sr_session_send(devc->session_dev_id, &packet);
868
869 devc->num_samples += cur_sample_count;
870 if (devc->limit_samples &&
871 (unsigned int)devc->num_samples > devc->limit_samples) {
872 abort_acquisition(devc);
873 free_transfer(transfer);
874 return;
875 }
876 } else {
877 /*
878 * TODO: Buffer pre-trigger data in capture
879 * ratio-sized buffer.
880 */
881 }
882
883 resubmit_transfer(transfer);
884}
885
886static unsigned int to_bytes_per_ms(unsigned int samplerate)
887{
888 return samplerate / 1000;
889}
890
891static size_t get_buffer_size(struct dev_context *devc)
892{
893 size_t s;
894
895 /*
896 * The buffer should be large enough to hold 10ms of data and
897 * a multiple of 512.
898 */
899 s = 10 * to_bytes_per_ms(devc->cur_samplerate);
900 return (s + 511) & ~511;
901}
902
903static unsigned int get_number_of_transfers(struct dev_context *devc)
904{
905 unsigned int n;
906
907 /* Total buffer size should be able to hold about 500ms of data. */
908 n = 500 * to_bytes_per_ms(devc->cur_samplerate) / get_buffer_size(devc);
909
910 if (n > NUM_SIMUL_TRANSFERS)
911 return NUM_SIMUL_TRANSFERS;
912
913 return n;
914}
915
916static unsigned int get_timeout(struct dev_context *devc)
917{
918 size_t total_size;
919 unsigned int timeout;
920
921 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
922 timeout = total_size / to_bytes_per_ms(devc->cur_samplerate);
923 return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
924}
925
926static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
927 void *cb_data)
928{
929 struct sr_datafeed_packet packet;
930 struct sr_datafeed_header header;
931 struct dev_context *devc;
932 struct drv_context *drvc;
933 struct libusb_transfer *transfer;
934 const struct libusb_pollfd **lupfd;
935 unsigned int i, timeout, num_transfers;
936 int ret;
937 unsigned char *buf;
938 size_t size;
939
940 drvc = di->priv;
941 devc = sdi->priv;
942
943 if (devc->submitted_transfers != 0)
944 return SR_ERR;
945
946 if (configure_probes(sdi) != SR_OK) {
947 sr_err("Failed to configure probes.");
948 return SR_ERR;
949 }
950
951 devc->session_dev_id = cb_data;
952 devc->num_samples = 0;
953 devc->empty_transfer_count = 0;
954
955 timeout = get_timeout(devc);
956 num_transfers = get_number_of_transfers(devc);
957 size = get_buffer_size(devc);
958
959 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
960 if (!devc->transfers) {
961 sr_err("USB transfers malloc failed.");
962 return SR_ERR_MALLOC;
963 }
964
965 devc->num_transfers = num_transfers;
966
967 for (i = 0; i < num_transfers; i++) {
968 if (!(buf = g_try_malloc(size))) {
969 sr_err("USB transfer buffer malloc failed.");
970 return SR_ERR_MALLOC;
971 }
972 transfer = libusb_alloc_transfer(0);
973 libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
974 2 | LIBUSB_ENDPOINT_IN, buf, size,
975 receive_transfer, devc, timeout);
976 if ((ret = libusb_submit_transfer(transfer)) != 0) {
977 sr_err("Failed to submit transfer: %s.",
978 libusb_error_name(ret));
979 libusb_free_transfer(transfer);
980 g_free(buf);
981 abort_acquisition(devc);
982 return SR_ERR;
983 }
984 devc->transfers[i] = transfer;
985 devc->submitted_transfers++;
986 }
987
988 lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
989 for (i = 0; lupfd[i]; i++)
990 sr_source_add(lupfd[i]->fd, lupfd[i]->events,
991 timeout, receive_data, NULL);
992 free(lupfd); /* NOT g_free()! */
993
994 packet.type = SR_DF_HEADER;
995 packet.payload = &header;
996 header.feed_version = 1;
997 gettimeofday(&header.starttime, NULL);
998 sr_session_send(cb_data, &packet);
999
1000 if ((ret = command_start_acquisition(devc->usb->devhdl,
1001 devc->cur_samplerate, devc->sample_wide)) != SR_OK) {
1002 abort_acquisition(devc);
1003 return ret;
1004 }
1005
1006 return SR_OK;
1007}
1008
1009/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
1010static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1011{
1012 (void)cb_data;
1013
1014 abort_acquisition(sdi->priv);
1015
1016 return SR_OK;
1017}
1018
1019SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
1020 .name = "fx2lafw",
1021 .longname = "fx2lafw (generic driver for FX2 based LAs)",
1022 .api_version = 1,
1023 .init = hw_init,
1024 .cleanup = hw_cleanup,
1025 .scan = hw_scan,
1026 .dev_list = hw_dev_list,
1027 .dev_clear = clear_instances,
1028 .dev_open = hw_dev_open,
1029 .dev_close = hw_dev_close,
1030 .info_get = hw_info_get,
1031 .dev_config_set = hw_dev_config_set,
1032 .dev_acquisition_start = hw_dev_acquisition_start,
1033 .dev_acquisition_stop = hw_dev_acquisition_stop,
1034 .priv = NULL,
1035};
Hardware access and backend lib