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sr: change sr_dev_trigger_set() to use sdi
[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 "config.h"
27#include "libsigrok.h"
28#include "libsigrok-internal.h"
29#include "fx2lafw.h"
30#include "command.h"
31
32static const struct fx2lafw_profile supported_fx2[] = {
33 /*
34 * CWAV USBee AX
35 * EE Electronics ESLA201A
36 * ARMFLY AX-Pro
37 */
38 { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
39 FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
40 0 },
41 /*
42 * CWAV USBee DX
43 * XZL-Studio DX
44 */
45 { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
46 FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
47 DEV_CAPS_16BIT },
48
49 /*
50 * CWAV USBee SX
51 */
52 { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
53 FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
54 0 },
55
56 /*
57 * Saleae Logic
58 * EE Electronics ESLA100
59 * Robomotic MiniLogic
60 * Robomotic BugLogic 3
61 */
62 { 0x0925, 0x3881, "Saleae", "Logic", NULL,
63 FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
64 0 },
65
66 /*
67 * Default Cypress FX2 without EEPROM, e.g.:
68 * Lcsoft Mini Board
69 * Braintechnology USB Interface V2.x
70 */
71 { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
72 FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
73 DEV_CAPS_16BIT },
74
75 /*
76 * Braintechnology USB-LPS
77 */
78 { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
79 FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
80 DEV_CAPS_16BIT },
81
82 { 0, 0, 0, 0, 0, 0, 0 }
83};
84
85static const int hwcaps[] = {
86 SR_HWCAP_LOGIC_ANALYZER,
87 SR_HWCAP_SAMPLERATE,
88
89 /* These are really implemented in the driver, not the hardware. */
90 SR_HWCAP_LIMIT_SAMPLES,
91 SR_HWCAP_CONTINUOUS,
92 0,
93};
94
95static const char *probe_names[] = {
96 "0",
97 "1",
98 "2",
99 "3",
100 "4",
101 "5",
102 "6",
103 "7",
104 "8",
105 "9",
106 "10",
107 "11",
108 "12",
109 "13",
110 "14",
111 "15",
112 NULL,
113};
114
115static const uint64_t supported_samplerates[] = {
116 SR_KHZ(20),
117 SR_KHZ(25),
118 SR_KHZ(50),
119 SR_KHZ(100),
120 SR_KHZ(200),
121 SR_KHZ(250),
122 SR_KHZ(500),
123 SR_MHZ(1),
124 SR_MHZ(2),
125 SR_MHZ(3),
126 SR_MHZ(4),
127 SR_MHZ(6),
128 SR_MHZ(8),
129 SR_MHZ(12),
130 SR_MHZ(16),
131 SR_MHZ(24),
132 0,
133};
134
135static const struct sr_samplerates samplerates = {
136 0,
137 0,
138 0,
139 supported_samplerates,
140};
141
142static libusb_context *usb_context = NULL;
143
144SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
145static struct sr_dev_driver *fdi = &fx2lafw_driver_info;
146static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
147 const void *value);
148static int hw_dev_acquisition_stop(int dev_index, void *cb_data);
149
150/**
151 * Check the USB configuration to determine if this is an fx2lafw device.
152 *
153 * @return TRUE if the device's configuration profile match fx2lafw
154 * configuration, FALSE otherwise.
155 */
156static gboolean check_conf_profile(libusb_device *dev)
157{
158 struct libusb_device_descriptor des;
159 struct libusb_device_handle *hdl;
160 gboolean ret;
161 unsigned char strdesc[64];
162
163 hdl = NULL;
164 ret = FALSE;
165 while (!ret) {
166 /* Assume the FW has not been loaded, unless proven wrong. */
167 if (libusb_get_device_descriptor(dev, &des) != 0)
168 break;
169
170 if (libusb_open(dev, &hdl) != 0)
171 break;
172
173 if (libusb_get_string_descriptor_ascii(hdl,
174 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
175 break;
176 if (strncmp((const char *)strdesc, "sigrok", 6))
177 break;
178
179 if (libusb_get_string_descriptor_ascii(hdl,
180 des.iProduct, strdesc, sizeof(strdesc)) < 0)
181 break;
182 if (strncmp((const char *)strdesc, "fx2lafw", 7))
183 break;
184
185 /* If we made it here, it must be an fx2lafw. */
186 ret = TRUE;
187 }
188 if (hdl)
189 libusb_close(hdl);
190
191 return ret;
192}
193
194static int fx2lafw_dev_open(int dev_index)
195{
196 libusb_device **devlist;
197 struct libusb_device_descriptor des;
198 struct sr_dev_inst *sdi;
199 struct context *ctx;
200 struct version_info vi;
201 int ret, skip, i;
202 uint8_t revid;
203
204 if (!(sdi = sr_dev_inst_get(fdi->instances, dev_index)))
205 return SR_ERR;
206 ctx = sdi->priv;
207
208 if (sdi->status == SR_ST_ACTIVE)
209 /* already in use */
210 return SR_ERR;
211
212 skip = 0;
213 const int device_count = libusb_get_device_list(usb_context, &devlist);
214 if (device_count < 0) {
215 sr_err("fx2lafw: Failed to retrieve device list (%d)",
216 device_count);
217 return SR_ERR;
218 }
219
220 for (i = 0; i < device_count; i++) {
221 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
222 sr_err("fx2lafw: Failed to get device descriptor: %d.",
223 ret);
224 continue;
225 }
226
227 if (des.idVendor != ctx->profile->vid
228 || des.idProduct != ctx->profile->pid)
229 continue;
230
231 if (sdi->status == SR_ST_INITIALIZING) {
232 if (skip != dev_index) {
233 /* Skip devices of this type that aren't the one we want. */
234 skip += 1;
235 continue;
236 }
237 } else if (sdi->status == SR_ST_INACTIVE) {
238 /*
239 * This device is fully enumerated, so we need to find
240 * this device by vendor, product, bus and address.
241 */
242 if (libusb_get_bus_number(devlist[i]) != ctx->usb->bus
243 || libusb_get_device_address(devlist[i]) != ctx->usb->address)
244 /* this is not the one */
245 continue;
246 }
247
248 if (!(ret = libusb_open(devlist[i], &ctx->usb->devhdl))) {
249 if (ctx->usb->address == 0xff)
250 /*
251 * first time we touch this device after firmware upload,
252 * so we don't know the address yet.
253 */
254 ctx->usb->address = libusb_get_device_address(devlist[i]);
255 } else {
256 sr_err("fx2lafw: Failed to open device: %d.", ret);
257 break;
258 }
259
260 ret = command_get_fw_version(ctx->usb->devhdl, &vi);
261 if (ret != SR_OK) {
262 sr_err("fx2lafw: Failed to retrieve "
263 "firmware version information.");
264 break;
265 }
266
267 ret = command_get_revid_version(ctx->usb->devhdl, &revid);
268 if (ret != SR_OK) {
269 sr_err("fx2lafw: Failed to retrieve REVID.");
270 break;
271 }
272
273 /*
274 * Changes in major version mean incompatible/API changes, so
275 * bail out if we encounter an incompatible version.
276 * Different minor versions are OK, they should be compatible.
277 */
278 if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) {
279 sr_err("fx2lafw: Expected firmware version %d.x, "
280 "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
281 vi.major, vi.minor);
282 break;
283 }
284
285 sdi->status = SR_ST_ACTIVE;
286 sr_info("fx2lafw: Opened device %d on %d.%d "
287 "interface %d, firmware %d.%d, REVID %d.",
288 sdi->index, ctx->usb->bus, ctx->usb->address,
289 USB_INTERFACE, vi.major, vi.minor, revid);
290
291 break;
292 }
293 libusb_free_device_list(devlist, 1);
294
295 if (sdi->status != SR_ST_ACTIVE)
296 return SR_ERR;
297
298 return SR_OK;
299}
300
301static void close_dev(struct sr_dev_inst *sdi)
302{
303 struct context *ctx;
304
305 ctx = sdi->priv;
306
307 if (ctx->usb->devhdl == NULL)
308 return;
309
310 sr_info("fx2lafw: Closing device %d on %d.%d interface %d.",
311 sdi->index, ctx->usb->bus, ctx->usb->address, USB_INTERFACE);
312 libusb_release_interface(ctx->usb->devhdl, USB_INTERFACE);
313 libusb_close(ctx->usb->devhdl);
314 ctx->usb->devhdl = NULL;
315 sdi->status = SR_ST_INACTIVE;
316}
317
318static int configure_probes(struct context *ctx, GSList *probes)
319{
320 struct sr_probe *probe;
321 GSList *l;
322 int probe_bit, stage, i;
323 char *tc;
324
325 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
326 ctx->trigger_mask[i] = 0;
327 ctx->trigger_value[i] = 0;
328 }
329
330 stage = -1;
331 for (l = probes; l; l = l->next) {
332 probe = (struct sr_probe *)l->data;
333 if (probe->enabled == FALSE)
334 continue;
335
336 if (probe->index > 8)
337 ctx->sample_wide = TRUE;
338
339 probe_bit = 1 << (probe->index - 1);
340 if (!(probe->trigger))
341 continue;
342
343 stage = 0;
344 for (tc = probe->trigger; *tc; tc++) {
345 ctx->trigger_mask[stage] |= probe_bit;
346 if (*tc == '1')
347 ctx->trigger_value[stage] |= probe_bit;
348 stage++;
349 if (stage > NUM_TRIGGER_STAGES)
350 return SR_ERR;
351 }
352 }
353
354 if (stage == -1)
355 /*
356 * We didn't configure any triggers, make sure acquisition
357 * doesn't wait for any.
358 */
359 ctx->trigger_stage = TRIGGER_FIRED;
360 else
361 ctx->trigger_stage = 0;
362
363 return SR_OK;
364}
365
366static struct context *fx2lafw_dev_new(void)
367{
368 struct context *ctx;
369
370 if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
371 sr_err("fx2lafw: %s: ctx malloc failed.", __func__);
372 return NULL;
373 }
374
375 ctx->trigger_stage = TRIGGER_FIRED;
376
377 return ctx;
378}
379
380static int clear_instances(void)
381{
382 GSList *l;
383 struct sr_dev_inst *sdi;
384 struct context *ctx;
385 int ret;
386
387 ret = SR_OK;
388 for (l = fdi->instances; l; l = l->next) {
389 if (!(sdi = l->data)) {
390 /* Log error, but continue cleaning up the rest. */
391 sr_err("fx2lafw: %s: sdi was NULL, continuing.",
392 __func__);
393 ret = SR_ERR_BUG;
394 continue;
395 }
396 if (!(ctx = sdi->priv)) {
397 /* Log error, but continue cleaning up the rest. */
398 sr_err("fx2lafw: %s: sdi->priv was NULL, continuing",
399 __func__);
400 ret = SR_ERR_BUG;
401 continue;
402 }
403 close_dev(sdi);
404 sdi = l->data;
405 sr_dev_inst_free(sdi);
406 }
407
408 g_slist_free(fdi->instances);
409 fdi->instances = NULL;
410
411 return ret;
412}
413
414
415/*
416 * API callbacks
417 */
418
419static int hw_init(void)
420{
421
422 if (libusb_init(&usb_context) != 0) {
423 sr_warn("fx2lafw: Failed to initialize libusb.");
424 return SR_ERR;
425 }
426
427 return SR_OK;
428}
429
430static GSList *hw_scan(GSList *options)
431{
432 GSList *devices;
433 struct libusb_device_descriptor des;
434 struct sr_dev_inst *sdi;
435 const struct fx2lafw_profile *prof;
436 struct context *ctx;
437 struct sr_probe *probe;
438 libusb_device **devlist;
439 int devcnt, num_logic_probes, ret, i, j;
440
441 /* Avoid compiler warnings. */
442 (void)options;
443
444 /* This scan always invalidates any previous scans. */
445 clear_instances();
446
447 /* Find all fx2lafw compatible devices and upload firmware to them. */
448 devices = NULL;
449 libusb_get_device_list(usb_context, &devlist);
450 for (i = 0; devlist[i]; i++) {
451
452 if ((ret = libusb_get_device_descriptor(
453 devlist[i], &des)) != 0) {
454 sr_warn("fx2lafw: Failed to get device descriptor: %d.", ret);
455 continue;
456 }
457
458 prof = NULL;
459 for (j = 0; supported_fx2[j].vid; j++) {
460 if (des.idVendor == supported_fx2[j].vid &&
461 des.idProduct == supported_fx2[j].pid) {
462 prof = &supported_fx2[j];
463 }
464 }
465
466 /* Skip if the device was not found */
467 if (!prof)
468 continue;
469
470 devcnt = g_slist_length(fdi->instances);
471 sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
472 prof->vendor, prof->model, prof->model_version);
473 if (!sdi)
474 return 0;
475 sdi->driver = fdi;
476
477 /* Fill in probelist according to this device's profile. */
478 num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
479 for (j = 0; j < num_logic_probes; j++) {
480 if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
481 probe_names[j])))
482 return 0;
483 sdi->probes = g_slist_append(sdi->probes, probe);
484 }
485
486 ctx = fx2lafw_dev_new();
487 ctx->profile = prof;
488 sdi->priv = ctx;
489 fdi->instances = g_slist_append(fdi->instances, sdi);
490 devices = g_slist_append(devices, sdi);
491
492 if (check_conf_profile(devlist[i])) {
493 /* Already has the firmware, so fix the new address. */
494 sr_dbg("fx2lafw: Found an fx2lafw device.");
495 sdi->status = SR_ST_INACTIVE;
496 ctx->usb = sr_usb_dev_inst_new
497 (libusb_get_bus_number(devlist[i]),
498 libusb_get_device_address(devlist[i]), NULL);
499 } else {
500 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
501 prof->firmware) == SR_OK)
502 /* Remember when the firmware on this device was updated */
503 ctx->fw_updated = g_get_monotonic_time();
504 else
505 sr_err("fx2lafw: Firmware upload failed for "
506 "device %d.", devcnt);
507 ctx->usb = sr_usb_dev_inst_new
508 (libusb_get_bus_number(devlist[i]), 0xff, NULL);
509 }
510 }
511 libusb_free_device_list(devlist, 1);
512
513 return devices;
514}
515
516static int hw_dev_open(int dev_index)
517{
518 struct sr_dev_inst *sdi;
519 struct context *ctx;
520 int ret;
521 int64_t timediff_us, timediff_ms;
522
523 if (!(sdi = sr_dev_inst_get(fdi->instances, dev_index)))
524 return SR_ERR;
525 ctx = sdi->priv;
526
527 /*
528 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
529 * milliseconds for the FX2 to renumerate.
530 */
531 ret = SR_ERR;
532 if (ctx->fw_updated > 0) {
533 sr_info("fx2lafw: Waiting for device to reset.");
534 /* takes at least 300ms for the FX2 to be gone from the USB bus */
535 g_usleep(300 * 1000);
536 timediff_ms = 0;
537 while (timediff_ms < MAX_RENUM_DELAY_MS) {
538 if ((ret = fx2lafw_dev_open(dev_index)) == SR_OK)
539 break;
540 g_usleep(100 * 1000);
541
542 timediff_us = g_get_monotonic_time() - ctx->fw_updated;
543 timediff_ms = timediff_us / 1000;
544 sr_spew("fx2lafw: waited %" PRIi64 " ms", timediff_ms);
545 }
546 sr_info("fx2lafw: Device came back after %d ms.", timediff_ms);
547 } else {
548 ret = fx2lafw_dev_open(dev_index);
549 }
550
551 if (ret != SR_OK) {
552 sr_err("fx2lafw: Unable to open device.");
553 return SR_ERR;
554 }
555 ctx = sdi->priv;
556
557 ret = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
558 if (ret != 0) {
559 switch(ret) {
560 case LIBUSB_ERROR_BUSY:
561 sr_err("fx2lafw: Unable to claim USB interface. Another "
562 "program or driver has already claimed it.");
563 break;
564
565 case LIBUSB_ERROR_NO_DEVICE:
566 sr_err("fx2lafw: Device has been disconnected.");
567 break;
568
569 default:
570 sr_err("fx2lafw: Unable to claim interface: %d.", ret);
571 break;
572 }
573
574 return SR_ERR;
575 }
576
577 if (ctx->cur_samplerate == 0) {
578 /* Samplerate hasn't been set; default to the slowest one. */
579 if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
580 &supported_samplerates[0]) == SR_ERR)
581 return SR_ERR;
582 }
583
584 return SR_OK;
585}
586
587static int hw_dev_close(int dev_index)
588{
589 struct sr_dev_inst *sdi;
590
591 if (!(sdi = sr_dev_inst_get(fdi->instances, dev_index))) {
592 sr_err("fx2lafw: %s: sdi was NULL.", __func__);
593 return SR_ERR_BUG;
594 }
595
596 /* TODO */
597 close_dev(sdi);
598
599 return SR_OK;
600}
601
602static int hw_cleanup(void)
603{
604 int ret;
605
606 ret = clear_instances();
607
608 if (usb_context)
609 libusb_exit(usb_context);
610 usb_context = NULL;
611
612 return ret;
613}
614
615static int hw_info_get(int info_id, const void **data,
616 const struct sr_dev_inst *sdi)
617{
618 struct context *ctx;
619
620 switch (info_id) {
621 case SR_DI_INST:
622 *data = sdi;
623 break;
624 case SR_DI_HWCAPS:
625 *data = hwcaps;
626 break;
627 case SR_DI_NUM_PROBES:
628 if (sdi) {
629 ctx = sdi->priv;
630 *data = GINT_TO_POINTER(
631 (ctx->profile->dev_caps & DEV_CAPS_16BIT) ?
632 16 : 8);
633 } else
634 return SR_ERR;
635 break;
636 case SR_DI_PROBE_NAMES:
637 *data = probe_names;
638 break;
639 case SR_DI_SAMPLERATES:
640 *data = &samplerates;
641 break;
642 case SR_DI_TRIGGER_TYPES:
643 *data = TRIGGER_TYPES;
644 break;
645 case SR_DI_CUR_SAMPLERATE:
646 if (sdi) {
647 ctx = sdi->priv;
648 *data = &ctx->cur_samplerate;
649 } else
650 return SR_ERR;
651 break;
652 default:
653 return SR_ERR_ARG;
654 }
655
656 return SR_OK;
657}
658
659static int hw_dev_status_get(int dev_index)
660{
661 const struct sr_dev_inst *const sdi =
662 sr_dev_inst_get(fdi->instances, dev_index);
663
664 if (!sdi)
665 return SR_ST_NOT_FOUND;
666
667 return sdi->status;
668}
669
670static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
671 const void *value)
672{
673 struct context *ctx;
674 int ret;
675
676 ctx = sdi->priv;
677
678 if (hwcap == SR_HWCAP_SAMPLERATE) {
679 ctx->cur_samplerate = *(const uint64_t *)value;
680 ret = SR_OK;
681 } else if (hwcap == SR_HWCAP_PROBECONFIG) {
682 ret = configure_probes(ctx, (GSList *) value);
683 } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
684 ctx->limit_samples = *(const uint64_t *)value;
685 ret = SR_OK;
686 } else {
687 ret = SR_ERR;
688 }
689
690 return ret;
691}
692
693static int receive_data(int fd, int revents, void *cb_data)
694{
695 struct timeval tv;
696
697 /* Avoid compiler warnings. */
698 (void)fd;
699 (void)revents;
700 (void)cb_data;
701
702 tv.tv_sec = tv.tv_usec = 0;
703 libusb_handle_events_timeout(usb_context, &tv);
704
705 return TRUE;
706}
707
708static void abort_acquisition(struct context *ctx)
709{
710 int i;
711
712 ctx->num_samples = -1;
713
714 for (i = ctx->num_transfers - 1; i >= 0; i--) {
715 if (ctx->transfers[i])
716 libusb_cancel_transfer(ctx->transfers[i]);
717 }
718}
719
720static void finish_acquisition(struct context *ctx)
721{
722 struct sr_datafeed_packet packet;
723 int i;
724
725 /* Terminate session */
726 packet.type = SR_DF_END;
727 sr_session_send(ctx->session_dev_id, &packet);
728
729 /* Remove fds from polling */
730 const struct libusb_pollfd **const lupfd =
731 libusb_get_pollfds(usb_context);
732 for (i = 0; lupfd[i]; i++)
733 sr_source_remove(lupfd[i]->fd);
734 free(lupfd); /* NOT g_free()! */
735
736 ctx->num_transfers = 0;
737 g_free(ctx->transfers);
738}
739
740static void free_transfer(struct libusb_transfer *transfer)
741{
742 struct context *ctx = transfer->user_data;
743 unsigned int i;
744
745 g_free(transfer->buffer);
746 transfer->buffer = NULL;
747 libusb_free_transfer(transfer);
748
749 for (i = 0; i < ctx->num_transfers; i++) {
750 if (ctx->transfers[i] == transfer) {
751 ctx->transfers[i] = NULL;
752 break;
753 }
754 }
755
756 ctx->submitted_transfers--;
757 if (ctx->submitted_transfers == 0)
758 finish_acquisition(ctx);
759
760}
761
762static void resubmit_transfer(struct libusb_transfer *transfer)
763{
764 if (libusb_submit_transfer(transfer) != 0) {
765 free_transfer(transfer);
766 /* TODO: Stop session? */
767 /* TODO: Better error message. */
768 sr_err("fx2lafw: %s: libusb_submit_transfer error.", __func__);
769 }
770}
771
772static void receive_transfer(struct libusb_transfer *transfer)
773{
774 gboolean packet_has_error = FALSE;
775 struct sr_datafeed_packet packet;
776 struct sr_datafeed_logic logic;
777 struct context *ctx = transfer->user_data;
778 int trigger_offset, i;
779
780 /*
781 * If acquisition has already ended, just free any queued up
782 * transfer that come in.
783 */
784 if (ctx->num_samples == -1) {
785 free_transfer(transfer);
786 return;
787 }
788
789 sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.",
790 transfer->status, transfer->actual_length);
791
792 /* Save incoming transfer before reusing the transfer struct. */
793 uint8_t *const cur_buf = transfer->buffer;
794 const int sample_width = ctx->sample_wide ? 2 : 1;
795 const int cur_sample_count = transfer->actual_length / sample_width;
796
797 switch (transfer->status) {
798 case LIBUSB_TRANSFER_NO_DEVICE:
799 abort_acquisition(ctx);
800 free_transfer(transfer);
801 return;
802 case LIBUSB_TRANSFER_COMPLETED:
803 case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
804 break;
805 default:
806 packet_has_error = TRUE;
807 break;
808 }
809
810 if (transfer->actual_length == 0 || packet_has_error) {
811 ctx->empty_transfer_count++;
812 if (ctx->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
813 /*
814 * The FX2 gave up. End the acquisition, the frontend
815 * will work out that the samplecount is short.
816 */
817 abort_acquisition(ctx);
818 free_transfer(transfer);
819 } else {
820 resubmit_transfer(transfer);
821 }
822 return;
823 } else {
824 ctx->empty_transfer_count = 0;
825 }
826
827 trigger_offset = 0;
828 if (ctx->trigger_stage >= 0) {
829 for (i = 0; i < cur_sample_count; i++) {
830
831 const uint16_t cur_sample = ctx->sample_wide ?
832 *((const uint16_t*)cur_buf + i) :
833 *((const uint8_t*)cur_buf + i);
834
835 if ((cur_sample & ctx->trigger_mask[ctx->trigger_stage]) ==
836 ctx->trigger_value[ctx->trigger_stage]) {
837 /* Match on this trigger stage. */
838 ctx->trigger_buffer[ctx->trigger_stage] = cur_sample;
839 ctx->trigger_stage++;
840
841 if (ctx->trigger_stage == NUM_TRIGGER_STAGES ||
842 ctx->trigger_mask[ctx->trigger_stage] == 0) {
843 /* Match on all trigger stages, we're done. */
844 trigger_offset = i + 1;
845
846 /*
847 * TODO: Send pre-trigger buffer to session bus.
848 * Tell the frontend we hit the trigger here.
849 */
850 packet.type = SR_DF_TRIGGER;
851 packet.payload = NULL;
852 sr_session_send(ctx->session_dev_id, &packet);
853
854 /*
855 * Send the samples that triggered it, since we're
856 * skipping past them.
857 */
858 packet.type = SR_DF_LOGIC;
859 packet.payload = &logic;
860 logic.unitsize = sizeof(*ctx->trigger_buffer);
861 logic.length = ctx->trigger_stage * logic.unitsize;
862 logic.data = ctx->trigger_buffer;
863 sr_session_send(ctx->session_dev_id, &packet);
864
865 ctx->trigger_stage = TRIGGER_FIRED;
866 break;
867 }
868 } else if (ctx->trigger_stage > 0) {
869 /*
870 * We had a match before, but not in the next sample. However, we may
871 * have a match on this stage in the next bit -- trigger on 0001 will
872 * fail on seeing 00001, so we need to go back to stage 0 -- but at
873 * the next sample from the one that matched originally, which the
874 * counter increment at the end of the loop takes care of.
875 */
876 i -= ctx->trigger_stage;
877 if (i < -1)
878 i = -1; /* Oops, went back past this buffer. */
879 /* Reset trigger stage. */
880 ctx->trigger_stage = 0;
881 }
882 }
883 }
884
885 if (ctx->trigger_stage == TRIGGER_FIRED) {
886 /* Send the incoming transfer to the session bus. */
887 const int trigger_offset_bytes = trigger_offset * sample_width;
888 packet.type = SR_DF_LOGIC;
889 packet.payload = &logic;
890 logic.length = transfer->actual_length - trigger_offset_bytes;
891 logic.unitsize = sample_width;
892 logic.data = cur_buf + trigger_offset_bytes;
893 sr_session_send(ctx->session_dev_id, &packet);
894
895 ctx->num_samples += cur_sample_count;
896 if (ctx->limit_samples &&
897 (unsigned int)ctx->num_samples > ctx->limit_samples) {
898 abort_acquisition(ctx);
899 free_transfer(transfer);
900 return;
901 }
902 } else {
903 /*
904 * TODO: Buffer pre-trigger data in capture
905 * ratio-sized buffer.
906 */
907 }
908
909 resubmit_transfer(transfer);
910}
911
912static unsigned int to_bytes_per_ms(unsigned int samplerate)
913{
914 return samplerate / 1000;
915}
916
917static size_t get_buffer_size(struct context *ctx)
918{
919 size_t s;
920
921 /* The buffer should be large enough to hold 10ms of data and a multiple
922 * of 512. */
923 s = 10 * to_bytes_per_ms(ctx->cur_samplerate);
924 return (s + 511) & ~511;
925}
926
927static unsigned int get_number_of_transfers(struct context *ctx)
928{
929 unsigned int n;
930
931 /* Total buffer size should be able to hold about 500ms of data */
932 n = 500 * to_bytes_per_ms(ctx->cur_samplerate) / get_buffer_size(ctx);
933
934 if (n > NUM_SIMUL_TRANSFERS)
935 return NUM_SIMUL_TRANSFERS;
936
937 return n;
938}
939
940static unsigned int get_timeout(struct context *ctx)
941{
942 size_t total_size;
943 unsigned int timeout;
944
945 total_size = get_buffer_size(ctx) * get_number_of_transfers(ctx);
946 timeout = total_size / to_bytes_per_ms(ctx->cur_samplerate);
947 return timeout + timeout / 4; /* Leave a headroom of 25% percent */
948}
949
950static int hw_dev_acquisition_start(int dev_index, void *cb_data)
951{
952 struct sr_dev_inst *sdi;
953 struct sr_datafeed_packet packet;
954 struct sr_datafeed_header header;
955 struct sr_datafeed_meta_logic meta;
956 struct context *ctx;
957 struct libusb_transfer *transfer;
958 const struct libusb_pollfd **lupfd;
959 unsigned int i;
960 int ret;
961 unsigned char *buf;
962
963 if (!(sdi = sr_dev_inst_get(fdi->instances, dev_index)))
964 return SR_ERR;
965 ctx = sdi->priv;
966
967 if (ctx->submitted_transfers != 0)
968 return SR_ERR;
969
970 ctx->session_dev_id = cb_data;
971 ctx->num_samples = 0;
972 ctx->empty_transfer_count = 0;
973
974 const unsigned int timeout = get_timeout(ctx);
975 const unsigned int num_transfers = get_number_of_transfers(ctx);
976 const size_t size = get_buffer_size(ctx);
977
978 ctx->transfers = g_try_malloc0(sizeof(*ctx->transfers) * num_transfers);
979 if (!ctx->transfers)
980 return SR_ERR;
981
982 ctx->num_transfers = num_transfers;
983
984 for (i = 0; i < num_transfers; i++) {
985 if (!(buf = g_try_malloc(size))) {
986 sr_err("fx2lafw: %s: buf malloc failed.", __func__);
987 return SR_ERR_MALLOC;
988 }
989 transfer = libusb_alloc_transfer(0);
990 libusb_fill_bulk_transfer(transfer, ctx->usb->devhdl,
991 2 | LIBUSB_ENDPOINT_IN, buf, size,
992 receive_transfer, ctx, timeout);
993 if (libusb_submit_transfer(transfer) != 0) {
994 libusb_free_transfer(transfer);
995 g_free(buf);
996 abort_acquisition(ctx);
997 return SR_ERR;
998 }
999 ctx->transfers[i] = transfer;
1000 ctx->submitted_transfers++;
1001 }
1002
1003 lupfd = libusb_get_pollfds(usb_context);
1004 for (i = 0; lupfd[i]; i++)
1005 sr_source_add(lupfd[i]->fd, lupfd[i]->events,
1006 timeout, receive_data, NULL);
1007 free(lupfd); /* NOT g_free()! */
1008
1009 packet.type = SR_DF_HEADER;
1010 packet.payload = &header;
1011 header.feed_version = 1;
1012 gettimeofday(&header.starttime, NULL);
1013 sr_session_send(cb_data, &packet);
1014
1015 /* Send metadata about the SR_DF_LOGIC packets to come. */
1016 packet.type = SR_DF_META_LOGIC;
1017 packet.payload = &meta;
1018 meta.samplerate = ctx->cur_samplerate;
1019 meta.num_probes = ctx->sample_wide ? 16 : 8;
1020 sr_session_send(cb_data, &packet);
1021
1022 if ((ret = command_start_acquisition (ctx->usb->devhdl,
1023 ctx->cur_samplerate, ctx->sample_wide)) != SR_OK) {
1024 abort_acquisition(ctx);
1025 return ret;
1026 }
1027
1028 return SR_OK;
1029}
1030
1031/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
1032static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
1033{
1034 struct sr_dev_inst *sdi;
1035
1036 /* Avoid compiler warnings. */
1037 (void)cb_data;
1038
1039 if (!(sdi = sr_dev_inst_get(fdi->instances, dev_index)))
1040 return SR_ERR;
1041
1042 abort_acquisition(sdi->priv);
1043
1044 return SR_OK;
1045}
1046
1047SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
1048 .name = "fx2lafw",
1049 .longname = "fx2lafw (generic driver for FX2 based LAs)",
1050 .api_version = 1,
1051 .init = hw_init,
1052 .cleanup = hw_cleanup,
1053 .scan = hw_scan,
1054 .dev_open = hw_dev_open,
1055 .dev_close = hw_dev_close,
1056 .info_get = hw_info_get,
1057 .dev_status_get = hw_dev_status_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 .instances = NULL,
1062};
Hardware access and backend lib