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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",
96 "1",
97 "2",
98 "3",
99 "4",
100 "5",
101 "6",
102 "7",
103 "8",
104 "9",
105 "10",
106 "11",
107 "12",
108 "13",
109 "14",
110 "15",
111 NULL,
112};
113
114static const uint64_t supported_samplerates[] = {
115 SR_KHZ(20),
116 SR_KHZ(25),
117 SR_KHZ(50),
118 SR_KHZ(100),
119 SR_KHZ(200),
120 SR_KHZ(250),
121 SR_KHZ(500),
122 SR_MHZ(1),
123 SR_MHZ(2),
124 SR_MHZ(3),
125 SR_MHZ(4),
126 SR_MHZ(6),
127 SR_MHZ(8),
128 SR_MHZ(12),
129 SR_MHZ(16),
130 SR_MHZ(24),
131 0,
132};
133
134static const struct sr_samplerates samplerates = {
135 0,
136 0,
137 0,
138 supported_samplerates,
139};
140
141SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
142static struct sr_dev_driver *fdi = &fx2lafw_driver_info;
143static int hw_dev_close(struct sr_dev_inst *sdi);
144static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
145 const void *value);
146static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
147
148/**
149 * Check the USB configuration to determine if this is an fx2lafw device.
150 *
151 * @return TRUE if the device's configuration profile match fx2lafw
152 * configuration, FALSE otherwise.
153 */
154static gboolean check_conf_profile(libusb_device *dev)
155{
156 struct libusb_device_descriptor des;
157 struct libusb_device_handle *hdl;
158 gboolean ret;
159 unsigned char strdesc[64];
160
161 hdl = NULL;
162 ret = FALSE;
163 while (!ret) {
164 /* Assume the FW has not been loaded, unless proven wrong. */
165 if (libusb_get_device_descriptor(dev, &des) != 0)
166 break;
167
168 if (libusb_open(dev, &hdl) != 0)
169 break;
170
171 if (libusb_get_string_descriptor_ascii(hdl,
172 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
173 break;
174 if (strncmp((const char *)strdesc, "sigrok", 6))
175 break;
176
177 if (libusb_get_string_descriptor_ascii(hdl,
178 des.iProduct, strdesc, sizeof(strdesc)) < 0)
179 break;
180 if (strncmp((const char *)strdesc, "fx2lafw", 7))
181 break;
182
183 /* If we made it here, it must be an fx2lafw. */
184 ret = TRUE;
185 }
186 if (hdl)
187 libusb_close(hdl);
188
189 return ret;
190}
191
192static int fx2lafw_dev_open(struct sr_dev_inst *sdi)
193{
194 libusb_device **devlist;
195 struct libusb_device_descriptor des;
196 struct dev_context *devc;
197 struct drv_context *drvc = fdi->priv;
198 struct version_info vi;
199 int ret, skip, i;
200 uint8_t revid;
201
202 devc = sdi->priv;
203
204 if (sdi->status == SR_ST_ACTIVE)
205 /* already in use */
206 return SR_ERR;
207
208 skip = 0;
209 const int device_count = libusb_get_device_list(
210 drvc->sr_ctx->libusb_ctx, &devlist);
211 if (device_count < 0) {
212 sr_err("fx2lafw: Failed to retrieve device list (%d)",
213 device_count);
214 return SR_ERR;
215 }
216
217 for (i = 0; i < device_count; i++) {
218 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
219 sr_err("fx2lafw: Failed to get device descriptor: %s.",
220 libusb_error_name(ret));
221 continue;
222 }
223
224 if (des.idVendor != devc->profile->vid
225 || des.idProduct != devc->profile->pid)
226 continue;
227
228 if (sdi->status == SR_ST_INITIALIZING) {
229 if (skip != sdi->index) {
230 /* Skip devices of this type that aren't the one we want. */
231 skip += 1;
232 continue;
233 }
234 } else if (sdi->status == SR_ST_INACTIVE) {
235 /*
236 * This device is fully enumerated, so we need to find
237 * this device by vendor, product, bus and address.
238 */
239 if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
240 || libusb_get_device_address(devlist[i]) != devc->usb->address)
241 /* this is not the one */
242 continue;
243 }
244
245 if (!(ret = libusb_open(devlist[i], &devc->usb->devhdl))) {
246 if (devc->usb->address == 0xff)
247 /*
248 * first time we touch this device after firmware upload,
249 * so we don't know the address yet.
250 */
251 devc->usb->address = libusb_get_device_address(devlist[i]);
252 } else {
253 sr_err("fx2lafw: Failed to open device: %s.",
254 libusb_error_name(ret));
255 break;
256 }
257
258 ret = command_get_fw_version(devc->usb->devhdl, &vi);
259 if (ret != SR_OK) {
260 sr_err("fx2lafw: Failed to retrieve "
261 "firmware version information.");
262 break;
263 }
264
265 ret = command_get_revid_version(devc->usb->devhdl, &revid);
266 if (ret != SR_OK) {
267 sr_err("fx2lafw: Failed to retrieve REVID.");
268 break;
269 }
270
271 /*
272 * Changes in major version mean incompatible/API changes, so
273 * bail out if we encounter an incompatible version.
274 * Different minor versions are OK, they should be compatible.
275 */
276 if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) {
277 sr_err("fx2lafw: Expected firmware version %d.x, "
278 "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
279 vi.major, vi.minor);
280 break;
281 }
282
283 sdi->status = SR_ST_ACTIVE;
284 sr_info("fx2lafw: Opened device %d on %d.%d "
285 "interface %d, firmware %d.%d, REVID %d.",
286 sdi->index, devc->usb->bus, devc->usb->address,
287 USB_INTERFACE, vi.major, vi.minor, revid);
288
289 break;
290 }
291 libusb_free_device_list(devlist, 1);
292
293 if (sdi->status != SR_ST_ACTIVE)
294 return SR_ERR;
295
296 return SR_OK;
297}
298
299static int configure_probes(const struct sr_dev_inst *sdi)
300{
301 struct dev_context *devc;
302 struct sr_probe *probe;
303 GSList *l;
304 int probe_bit, stage, i;
305 char *tc;
306
307 devc = sdi->priv;
308 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
309 devc->trigger_mask[i] = 0;
310 devc->trigger_value[i] = 0;
311 }
312
313 stage = -1;
314 for (l = sdi->probes; l; l = l->next) {
315 probe = (struct sr_probe *)l->data;
316 if (probe->enabled == FALSE)
317 continue;
318
319 if (probe->index > 7)
320 devc->sample_wide = TRUE;
321
322 probe_bit = 1 << (probe->index);
323 if (!(probe->trigger))
324 continue;
325
326 stage = 0;
327 for (tc = probe->trigger; *tc; tc++) {
328 devc->trigger_mask[stage] |= probe_bit;
329 if (*tc == '1')
330 devc->trigger_value[stage] |= probe_bit;
331 stage++;
332 if (stage > NUM_TRIGGER_STAGES)
333 return SR_ERR;
334 }
335 }
336
337 if (stage == -1)
338 /*
339 * We didn't configure any triggers, make sure acquisition
340 * doesn't wait for any.
341 */
342 devc->trigger_stage = TRIGGER_FIRED;
343 else
344 devc->trigger_stage = 0;
345
346 return SR_OK;
347}
348
349static struct dev_context *fx2lafw_dev_new(void)
350{
351 struct dev_context *devc;
352
353 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
354 sr_err("fx2lafw: %s: devc malloc failed.", __func__);
355 return NULL;
356 }
357
358 devc->trigger_stage = TRIGGER_FIRED;
359
360 return devc;
361}
362
363static int clear_instances(void)
364{
365 GSList *l;
366 struct sr_dev_inst *sdi;
367 struct drv_context *drvc;
368 struct dev_context *devc;
369 int ret;
370
371 drvc = fdi->priv;
372 ret = SR_OK;
373 for (l = drvc->instances; l; l = l->next) {
374 if (!(sdi = l->data)) {
375 /* Log error, but continue cleaning up the rest. */
376 sr_err("fx2lafw: %s: sdi was NULL, continuing.",
377 __func__);
378 ret = SR_ERR_BUG;
379 continue;
380 }
381 if (!(devc = sdi->priv)) {
382 /* Log error, but continue cleaning up the rest. */
383 sr_err("fx2lafw: %s: sdi->priv was NULL, continuing",
384 __func__);
385 ret = SR_ERR_BUG;
386 continue;
387 }
388 hw_dev_close(sdi);
389 sr_usb_dev_inst_free(devc->usb);
390 sdi = l->data;
391 sr_dev_inst_free(sdi);
392 }
393
394 g_slist_free(drvc->instances);
395 drvc->instances = NULL;
396
397 return ret;
398}
399
400
401/*
402 * API callbacks
403 */
404
405static int hw_init(struct sr_context *sr_ctx)
406{
407 struct drv_context *drvc;
408
409 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
410 sr_err("fx2lafw: driver context malloc failed.");
411 return SR_ERR_MALLOC;
412 }
413
414 drvc->sr_ctx = sr_ctx;
415 fdi->priv = drvc;
416
417 return SR_OK;
418}
419
420static GSList *hw_scan(GSList *options)
421{
422 GSList *devices;
423 struct libusb_device_descriptor des;
424 struct sr_dev_inst *sdi;
425 const struct fx2lafw_profile *prof;
426 struct drv_context *drvc;
427 struct dev_context *devc;
428 struct sr_probe *probe;
429 libusb_device **devlist;
430 int devcnt, num_logic_probes, ret, i, j;
431
432 (void)options;
433
434 drvc = fdi->priv;
435
436 /* This scan always invalidates any previous scans. */
437 clear_instances();
438
439 /* Find all fx2lafw compatible devices and upload firmware to them. */
440 devices = NULL;
441 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
442 for (i = 0; devlist[i]; i++) {
443
444 if ((ret = libusb_get_device_descriptor(
445 devlist[i], &des)) != 0) {
446 sr_warn("fx2lafw: Failed to get device descriptor: %s.",
447 libusb_error_name(ret));
448 continue;
449 }
450
451 prof = NULL;
452 for (j = 0; supported_fx2[j].vid; j++) {
453 if (des.idVendor == supported_fx2[j].vid &&
454 des.idProduct == supported_fx2[j].pid) {
455 prof = &supported_fx2[j];
456 }
457 }
458
459 /* Skip if the device was not found */
460 if (!prof)
461 continue;
462
463 devcnt = g_slist_length(drvc->instances);
464 sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
465 prof->vendor, prof->model, prof->model_version);
466 if (!sdi)
467 return NULL;
468 sdi->driver = fdi;
469
470 /* Fill in probelist according to this device's profile. */
471 num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
472 for (j = 0; j < num_logic_probes; j++) {
473 if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
474 probe_names[j])))
475 return NULL;
476 sdi->probes = g_slist_append(sdi->probes, probe);
477 }
478
479 devc = fx2lafw_dev_new();
480 devc->profile = prof;
481 sdi->priv = devc;
482 drvc->instances = g_slist_append(drvc->instances, sdi);
483 devices = g_slist_append(devices, sdi);
484
485 if (check_conf_profile(devlist[i])) {
486 /* Already has the firmware, so fix the new address. */
487 sr_dbg("fx2lafw: Found an fx2lafw device.");
488 sdi->status = SR_ST_INACTIVE;
489 devc->usb = sr_usb_dev_inst_new
490 (libusb_get_bus_number(devlist[i]),
491 libusb_get_device_address(devlist[i]), NULL);
492 } else {
493 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
494 prof->firmware) == SR_OK)
495 /* Remember when the firmware on this device was updated */
496 devc->fw_updated = g_get_monotonic_time();
497 else
498 sr_err("fx2lafw: Firmware upload failed for "
499 "device %d.", devcnt);
500 devc->usb = sr_usb_dev_inst_new
501 (libusb_get_bus_number(devlist[i]), 0xff, NULL);
502 }
503 }
504 libusb_free_device_list(devlist, 1);
505
506 return devices;
507}
508
509static GSList *hw_dev_list(void)
510{
511 struct drv_context *drvc;
512
513 drvc = fdi->priv;
514
515 return drvc->instances;
516}
517
518static int hw_dev_open(struct sr_dev_inst *sdi)
519{
520 struct dev_context *devc;
521 int ret;
522 int64_t timediff_us, timediff_ms;
523
524 devc = sdi->priv;
525
526 /*
527 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
528 * milliseconds for the FX2 to renumerate.
529 */
530 ret = SR_ERR;
531 if (devc->fw_updated > 0) {
532 sr_info("fx2lafw: Waiting for device to reset.");
533 /* takes at least 300ms for the FX2 to be gone from the USB bus */
534 g_usleep(300 * 1000);
535 timediff_ms = 0;
536 while (timediff_ms < MAX_RENUM_DELAY_MS) {
537 if ((ret = fx2lafw_dev_open(sdi)) == SR_OK)
538 break;
539 g_usleep(100 * 1000);
540
541 timediff_us = g_get_monotonic_time() - devc->fw_updated;
542 timediff_ms = timediff_us / 1000;
543 sr_spew("fx2lafw: waited %" PRIi64 " ms", timediff_ms);
544 }
545 } else {
546 ret = fx2lafw_dev_open(sdi);
547 }
548
549 if (ret != SR_OK) {
550 sr_err("fx2lafw: Unable to open device.");
551 return SR_ERR;
552 } else {
553 sr_info("fx2lafw: Device came back after %d ms.",
554 timediff_ms);
555 }
556
557 devc = sdi->priv;
558
559 ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
560 if (ret != 0) {
561 switch(ret) {
562 case LIBUSB_ERROR_BUSY:
563 sr_err("fx2lafw: Unable to claim USB interface. Another "
564 "program or driver has already claimed it.");
565 break;
566
567 case LIBUSB_ERROR_NO_DEVICE:
568 sr_err("fx2lafw: Device has been disconnected.");
569 break;
570
571 default:
572 sr_err("fx2lafw: Unable to claim interface: %s.",
573 libusb_error_name(ret));
574 break;
575 }
576
577 return SR_ERR;
578 }
579
580 if (devc->cur_samplerate == 0) {
581 /* Samplerate hasn't been set; default to the slowest one. */
582 if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
583 &supported_samplerates[0]) == SR_ERR)
584 return SR_ERR;
585 }
586
587 return SR_OK;
588}
589
590static int hw_dev_close(struct sr_dev_inst *sdi)
591{
592 struct dev_context *devc;
593
594 devc = sdi->priv;
595 if (devc->usb->devhdl == NULL)
596 return SR_ERR;
597
598 sr_info("fx2lafw: Closing device %d on %d.%d interface %d.",
599 sdi->index, devc->usb->bus, devc->usb->address, USB_INTERFACE);
600 libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
601 libusb_close(devc->usb->devhdl);
602 devc->usb->devhdl = NULL;
603 sdi->status = SR_ST_INACTIVE;
604
605 return SR_OK;
606}
607
608static int hw_cleanup(void)
609{
610 struct drv_context *drvc;
611 int ret;
612
613 if (!(drvc = fdi->priv))
614 return SR_OK;
615
616 ret = clear_instances();
617
618 g_free(drvc);
619 fdi->priv = NULL;
620
621 return ret;
622}
623
624static int hw_info_get(int info_id, const void **data,
625 const struct sr_dev_inst *sdi)
626{
627 struct dev_context *devc;
628
629 switch (info_id) {
630 case SR_DI_HWCAPS:
631 *data = hwcaps;
632 break;
633 case SR_DI_NUM_PROBES:
634 if (sdi) {
635 devc = sdi->priv;
636 *data = GINT_TO_POINTER(
637 (devc->profile->dev_caps & DEV_CAPS_16BIT) ?
638 16 : 8);
639 } else
640 return SR_ERR;
641 break;
642 case SR_DI_PROBE_NAMES:
643 *data = probe_names;
644 break;
645 case SR_DI_SAMPLERATES:
646 *data = &samplerates;
647 break;
648 case SR_DI_TRIGGER_TYPES:
649 *data = TRIGGER_TYPES;
650 break;
651 case SR_DI_CUR_SAMPLERATE:
652 if (sdi) {
653 devc = sdi->priv;
654 *data = &devc->cur_samplerate;
655 } else
656 return SR_ERR;
657 break;
658 default:
659 return SR_ERR_ARG;
660 }
661
662 return SR_OK;
663}
664
665static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
666 const void *value)
667{
668 struct dev_context *devc;
669 int ret;
670
671 devc = sdi->priv;
672
673 if (hwcap == SR_HWCAP_SAMPLERATE) {
674 devc->cur_samplerate = *(const uint64_t *)value;
675 ret = SR_OK;
676 } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
677 devc->limit_samples = *(const uint64_t *)value;
678 ret = SR_OK;
679 } else {
680 ret = SR_ERR;
681 }
682
683 return ret;
684}
685
686static int receive_data(int fd, int revents, void *cb_data)
687{
688 struct timeval tv;
689 struct drv_context *drvc = fdi->priv;
690
691 (void)fd;
692 (void)revents;
693 (void)cb_data;
694
695 tv.tv_sec = tv.tv_usec = 0;
696 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
697
698 return TRUE;
699}
700
701static void abort_acquisition(struct dev_context *devc)
702{
703 int i;
704
705 devc->num_samples = -1;
706
707 for (i = devc->num_transfers - 1; i >= 0; i--) {
708 if (devc->transfers[i])
709 libusb_cancel_transfer(devc->transfers[i]);
710 }
711}
712
713static void finish_acquisition(struct dev_context *devc)
714{
715 struct sr_datafeed_packet packet;
716 struct drv_context *drvc = fdi->priv;
717 int i;
718
719
720 /* Terminate session */
721 packet.type = SR_DF_END;
722 sr_session_send(devc->session_dev_id, &packet);
723
724 /* Remove fds from polling */
725 const struct libusb_pollfd **const lupfd =
726 libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
727 for (i = 0; lupfd[i]; i++)
728 sr_source_remove(lupfd[i]->fd);
729 free(lupfd); /* NOT g_free()! */
730
731 devc->num_transfers = 0;
732 g_free(devc->transfers);
733}
734
735static void free_transfer(struct libusb_transfer *transfer)
736{
737 struct dev_context *devc = transfer->user_data;
738 unsigned int i;
739
740 g_free(transfer->buffer);
741 transfer->buffer = NULL;
742 libusb_free_transfer(transfer);
743
744 for (i = 0; i < devc->num_transfers; i++) {
745 if (devc->transfers[i] == transfer) {
746 devc->transfers[i] = NULL;
747 break;
748 }
749 }
750
751 devc->submitted_transfers--;
752 if (devc->submitted_transfers == 0)
753 finish_acquisition(devc);
754
755}
756
757static void resubmit_transfer(struct libusb_transfer *transfer)
758{
759 int ret = libusb_submit_transfer(transfer);
760
761 if (LIBUSB_SUCCESS == ret)
762 return;
763
764 free_transfer(transfer);
765 /* TODO: Stop session? */
766
767 sr_err("fx2lafw: %s: %s", __func__, libusb_error_name(ret));
768}
769
770static void receive_transfer(struct libusb_transfer *transfer)
771{
772 gboolean packet_has_error = FALSE;
773 struct sr_datafeed_packet packet;
774 struct sr_datafeed_logic logic;
775 struct dev_context *devc = transfer->user_data;
776 int trigger_offset, i;
777
778 /*
779 * If acquisition has already ended, just free any queued up
780 * transfer that come in.
781 */
782 if (devc->num_samples == -1) {
783 free_transfer(transfer);
784 return;
785 }
786
787 sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.",
788 transfer->status, transfer->actual_length);
789
790 /* Save incoming transfer before reusing the transfer struct. */
791 uint8_t *const cur_buf = transfer->buffer;
792 const int sample_width = devc->sample_wide ? 2 : 1;
793 const int cur_sample_count = transfer->actual_length / sample_width;
794
795 switch (transfer->status) {
796 case LIBUSB_TRANSFER_NO_DEVICE:
797 abort_acquisition(devc);
798 free_transfer(transfer);
799 return;
800 case LIBUSB_TRANSFER_COMPLETED:
801 case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
802 break;
803 default:
804 packet_has_error = TRUE;
805 break;
806 }
807
808 if (transfer->actual_length == 0 || packet_has_error) {
809 devc->empty_transfer_count++;
810 if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
811 /*
812 * The FX2 gave up. End the acquisition, the frontend
813 * will work out that the samplecount is short.
814 */
815 abort_acquisition(devc);
816 free_transfer(transfer);
817 } else {
818 resubmit_transfer(transfer);
819 }
820 return;
821 } else {
822 devc->empty_transfer_count = 0;
823 }
824
825 trigger_offset = 0;
826 if (devc->trigger_stage >= 0) {
827 for (i = 0; i < cur_sample_count; i++) {
828
829 const uint16_t cur_sample = devc->sample_wide ?
830 *((const uint16_t*)cur_buf + i) :
831 *((const uint8_t*)cur_buf + i);
832
833 if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) ==
834 devc->trigger_value[devc->trigger_stage]) {
835 /* Match on this trigger stage. */
836 devc->trigger_buffer[devc->trigger_stage] = cur_sample;
837 devc->trigger_stage++;
838
839 if (devc->trigger_stage == NUM_TRIGGER_STAGES ||
840 devc->trigger_mask[devc->trigger_stage] == 0) {
841 /* Match on all trigger stages, we're done. */
842 trigger_offset = i + 1;
843
844 /*
845 * TODO: Send pre-trigger buffer to session bus.
846 * Tell the frontend we hit the trigger here.
847 */
848 packet.type = SR_DF_TRIGGER;
849 packet.payload = NULL;
850 sr_session_send(devc->session_dev_id, &packet);
851
852 /*
853 * Send the samples that triggered it, since we're
854 * skipping past them.
855 */
856 packet.type = SR_DF_LOGIC;
857 packet.payload = &logic;
858 logic.unitsize = sizeof(*devc->trigger_buffer);
859 logic.length = devc->trigger_stage * logic.unitsize;
860 logic.data = devc->trigger_buffer;
861 sr_session_send(devc->session_dev_id, &packet);
862
863 devc->trigger_stage = TRIGGER_FIRED;
864 break;
865 }
866 } else if (devc->trigger_stage > 0) {
867 /*
868 * We had a match before, but not in the next sample. However, we may
869 * have a match on this stage in the next bit -- trigger on 0001 will
870 * fail on seeing 00001, so we need to go back to stage 0 -- but at
871 * the next sample from the one that matched originally, which the
872 * counter increment at the end of the loop takes care of.
873 */
874 i -= devc->trigger_stage;
875 if (i < -1)
876 i = -1; /* Oops, went back past this buffer. */
877 /* Reset trigger stage. */
878 devc->trigger_stage = 0;
879 }
880 }
881 }
882
883 if (devc->trigger_stage == TRIGGER_FIRED) {
884 /* Send the incoming transfer to the session bus. */
885 const int trigger_offset_bytes = trigger_offset * sample_width;
886 packet.type = SR_DF_LOGIC;
887 packet.payload = &logic;
888 logic.length = transfer->actual_length - trigger_offset_bytes;
889 logic.unitsize = sample_width;
890 logic.data = cur_buf + trigger_offset_bytes;
891 sr_session_send(devc->session_dev_id, &packet);
892
893 devc->num_samples += cur_sample_count;
894 if (devc->limit_samples &&
895 (unsigned int)devc->num_samples > devc->limit_samples) {
896 abort_acquisition(devc);
897 free_transfer(transfer);
898 return;
899 }
900 } else {
901 /*
902 * TODO: Buffer pre-trigger data in capture
903 * ratio-sized buffer.
904 */
905 }
906
907 resubmit_transfer(transfer);
908}
909
910static unsigned int to_bytes_per_ms(unsigned int samplerate)
911{
912 return samplerate / 1000;
913}
914
915static size_t get_buffer_size(struct dev_context *devc)
916{
917 size_t s;
918
919 /* The buffer should be large enough to hold 10ms of data and a multiple
920 * of 512. */
921 s = 10 * to_bytes_per_ms(devc->cur_samplerate);
922 return (s + 511) & ~511;
923}
924
925static unsigned int get_number_of_transfers(struct dev_context *devc)
926{
927 unsigned int n;
928
929 /* Total buffer size should be able to hold about 500ms of data */
930 n = 500 * to_bytes_per_ms(devc->cur_samplerate) / get_buffer_size(devc);
931
932 if (n > NUM_SIMUL_TRANSFERS)
933 return NUM_SIMUL_TRANSFERS;
934
935 return n;
936}
937
938static unsigned int get_timeout(struct dev_context *devc)
939{
940 size_t total_size;
941 unsigned int timeout;
942
943 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
944 timeout = total_size / to_bytes_per_ms(devc->cur_samplerate);
945 return timeout + timeout / 4; /* Leave a headroom of 25% percent */
946}
947
948static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
949 void *cb_data)
950{
951 struct sr_datafeed_packet packet;
952 struct sr_datafeed_header header;
953 struct sr_datafeed_meta_logic meta;
954 struct dev_context *devc;
955 struct drv_context *drvc = fdi->priv;
956 struct libusb_transfer *transfer;
957 const struct libusb_pollfd **lupfd;
958 unsigned int i;
959 int ret;
960 unsigned char *buf;
961
962 devc = sdi->priv;
963 if (devc->submitted_transfers != 0)
964 return SR_ERR;
965
966 if (configure_probes(sdi) != SR_OK) {
967 sr_err("fx2lafw: failed to configured probes");
968 return SR_ERR;
969 }
970
971 devc->session_dev_id = cb_data;
972 devc->num_samples = 0;
973 devc->empty_transfer_count = 0;
974
975 const unsigned int timeout = get_timeout(devc);
976 const unsigned int num_transfers = get_number_of_transfers(devc);
977 const size_t size = get_buffer_size(devc);
978
979 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
980 if (!devc->transfers) {
981 sr_err("fx2lafw: USB transfers malloc failed.");
982 return SR_ERR_MALLOC;
983 }
984
985 devc->num_transfers = num_transfers;
986
987 for (i = 0; i < num_transfers; i++) {
988 if (!(buf = g_try_malloc(size))) {
989 sr_err("fx2lafw: %s: buf malloc failed.", __func__);
990 return SR_ERR_MALLOC;
991 }
992 transfer = libusb_alloc_transfer(0);
993 libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
994 2 | LIBUSB_ENDPOINT_IN, buf, size,
995 receive_transfer, devc, timeout);
996 if ((ret = libusb_submit_transfer(transfer)) != 0) {
997 sr_err("fx2lafw: %s: libusb_submit_transfer: %s.",
998 __func__, libusb_error_name(ret));
999 libusb_free_transfer(transfer);
1000 g_free(buf);
1001 abort_acquisition(devc);
1002 return SR_ERR;
1003 }
1004 devc->transfers[i] = transfer;
1005 devc->submitted_transfers++;
1006 }
1007
1008 lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
1009 for (i = 0; lupfd[i]; i++)
1010 sr_source_add(lupfd[i]->fd, lupfd[i]->events,
1011 timeout, receive_data, NULL);
1012 free(lupfd); /* NOT g_free()! */
1013
1014 packet.type = SR_DF_HEADER;
1015 packet.payload = &header;
1016 header.feed_version = 1;
1017 gettimeofday(&header.starttime, NULL);
1018 sr_session_send(cb_data, &packet);
1019
1020 /* Send metadata about the SR_DF_LOGIC packets to come. */
1021 packet.type = SR_DF_META_LOGIC;
1022 packet.payload = &meta;
1023 meta.samplerate = devc->cur_samplerate;
1024 meta.num_probes = devc->sample_wide ? 16 : 8;
1025 sr_session_send(cb_data, &packet);
1026
1027 if ((ret = command_start_acquisition (devc->usb->devhdl,
1028 devc->cur_samplerate, devc->sample_wide)) != SR_OK) {
1029 abort_acquisition(devc);
1030 return ret;
1031 }
1032
1033 return SR_OK;
1034}
1035
1036/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
1037static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1038{
1039 (void)cb_data;
1040
1041 abort_acquisition(sdi->priv);
1042
1043 return SR_OK;
1044}
1045
1046SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
1047 .name = "fx2lafw",
1048 .longname = "fx2lafw (generic driver for FX2 based LAs)",
1049 .api_version = 1,
1050 .init = hw_init,
1051 .cleanup = hw_cleanup,
1052 .scan = hw_scan,
1053 .dev_list = hw_dev_list,
1054 .dev_clear = clear_instances,
1055 .dev_open = hw_dev_open,
1056 .dev_close = hw_dev_close,
1057 .info_get = hw_info_get,
1058 .dev_config_set = hw_dev_config_set,
1059 .dev_acquisition_start = hw_dev_acquisition_start,
1060 .dev_acquisition_stop = hw_dev_acquisition_stop,
1061 .priv = NULL,
1062};
Hardware access and backend lib