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sr_dev_close(): Set status to SR_ST_INACTIVE.
[libsigrok.git] / src / hardware / saleae-logic16 / api.c
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1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
5 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
6 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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 <glib.h>
24#include <libusb.h>
25#include <stdlib.h>
26#include <string.h>
27#include <math.h>
28#include <libsigrok/libsigrok.h>
29#include "libsigrok-internal.h"
30#include "protocol.h"
31
32#define LOGIC16_VID 0x21a9
33#define LOGIC16_PID 0x1001
34
35#define USB_INTERFACE 0
36#define USB_CONFIGURATION 1
37#define FX2_FIRMWARE "saleae-logic16-fx2.fw"
38
39#define MAX_RENUM_DELAY_MS 3000
40#define NUM_SIMUL_TRANSFERS 32
41
42static const uint32_t scanopts[] = {
43 SR_CONF_CONN,
44};
45
46static const uint32_t devopts[] = {
47 SR_CONF_LOGIC_ANALYZER,
48 SR_CONF_CONTINUOUS,
49 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
50 SR_CONF_CONN | SR_CONF_GET,
51 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
52 SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
53 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
54 SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
55};
56
57static const int32_t soft_trigger_matches[] = {
58 SR_TRIGGER_ZERO,
59 SR_TRIGGER_ONE,
60 SR_TRIGGER_RISING,
61 SR_TRIGGER_FALLING,
62 SR_TRIGGER_EDGE,
63};
64
65static const char *channel_names[] = {
66 "0", "1", "2", "3", "4", "5", "6", "7", "8",
67 "9", "10", "11", "12", "13", "14", "15",
68};
69
70static const struct {
71 enum voltage_range range;
72 gdouble low;
73 gdouble high;
74} volt_thresholds[] = {
75 { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
76 { VOLTAGE_RANGE_5_V, 1.4, 3.6 },
77};
78
79static const uint64_t samplerates[] = {
80 SR_KHZ(500),
81 SR_MHZ(1),
82 SR_MHZ(2),
83 SR_MHZ(4),
84 SR_MHZ(5),
85 SR_MHZ(8),
86 SR_MHZ(10),
87 SR_KHZ(12500),
88 SR_MHZ(16),
89 SR_MHZ(20),
90 SR_MHZ(25),
91 SR_MHZ(32),
92 SR_MHZ(40),
93 SR_MHZ(50),
94 SR_MHZ(80),
95 SR_MHZ(100),
96};
97
98static gboolean check_conf_profile(libusb_device *dev)
99{
100 struct libusb_device_descriptor des;
101 struct libusb_device_handle *hdl;
102 gboolean ret;
103 unsigned char strdesc[64];
104
105 hdl = NULL;
106 ret = FALSE;
107 while (!ret) {
108 /* Assume the FW has not been loaded, unless proven wrong. */
109 libusb_get_device_descriptor(dev, &des);
110
111 if (libusb_open(dev, &hdl) != 0)
112 break;
113
114 if (libusb_get_string_descriptor_ascii(hdl,
115 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
116 break;
117 if (strcmp((const char *)strdesc, "Saleae LLC"))
118 break;
119
120 if (libusb_get_string_descriptor_ascii(hdl,
121 des.iProduct, strdesc, sizeof(strdesc)) < 0)
122 break;
123 if (strcmp((const char *)strdesc, "Logic S/16"))
124 break;
125
126 /* If we made it here, it must be a configured Logic16. */
127 ret = TRUE;
128 }
129 if (hdl)
130 libusb_close(hdl);
131
132 return ret;
133}
134
135static GSList *scan(struct sr_dev_driver *di, GSList *options)
136{
137 struct drv_context *drvc;
138 struct dev_context *devc;
139 struct sr_dev_inst *sdi;
140 struct sr_usb_dev_inst *usb;
141 struct sr_config *src;
142 GSList *l, *devices, *conn_devices;
143 struct libusb_device_descriptor des;
144 libusb_device **devlist;
145 unsigned int i, j;
146 const char *conn;
147 char connection_id[64];
148
149 drvc = di->context;
150
151 conn = NULL;
152 for (l = options; l; l = l->next) {
153 src = l->data;
154 switch (src->key) {
155 case SR_CONF_CONN:
156 conn = g_variant_get_string(src->data, NULL);
157 break;
158 }
159 }
160 if (conn)
161 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
162 else
163 conn_devices = NULL;
164
165 /* Find all Logic16 devices and upload firmware to them. */
166 devices = NULL;
167 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
168 for (i = 0; devlist[i]; i++) {
169 if (conn) {
170 usb = NULL;
171 for (l = conn_devices; l; l = l->next) {
172 usb = l->data;
173 if (usb->bus == libusb_get_bus_number(devlist[i])
174 && usb->address == libusb_get_device_address(devlist[i]))
175 break;
176 }
177 if (!l)
178 /* This device matched none of the ones that
179 * matched the conn specification. */
180 continue;
181 }
182
183 libusb_get_device_descriptor(devlist[i], &des);
184
185 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
186
187 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
188 continue;
189
190 sdi = g_malloc0(sizeof(struct sr_dev_inst));
191 sdi->status = SR_ST_INITIALIZING;
192 sdi->vendor = g_strdup("Saleae");
193 sdi->model = g_strdup("Logic16");
194 sdi->connection_id = g_strdup(connection_id);
195
196 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
197 sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
198 channel_names[j]);
199
200 devc = g_malloc0(sizeof(struct dev_context));
201 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
202 sdi->priv = devc;
203 devices = g_slist_append(devices, sdi);
204
205 if (check_conf_profile(devlist[i])) {
206 /* Already has the firmware, so fix the new address. */
207 sr_dbg("Found a Logic16 device.");
208 sdi->status = SR_ST_INACTIVE;
209 sdi->inst_type = SR_INST_USB;
210 sdi->conn = sr_usb_dev_inst_new(
211 libusb_get_bus_number(devlist[i]),
212 libusb_get_device_address(devlist[i]), NULL);
213 } else {
214 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
215 USB_CONFIGURATION, FX2_FIRMWARE) == SR_OK)
216 /* Store when this device's FW was updated. */
217 devc->fw_updated = g_get_monotonic_time();
218 else
219 sr_err("Firmware upload failed.");
220 sdi->inst_type = SR_INST_USB;
221 sdi->conn = sr_usb_dev_inst_new(
222 libusb_get_bus_number(devlist[i]), 0xff, NULL);
223 }
224 }
225 libusb_free_device_list(devlist, 1);
226 g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
227
228 return std_scan_complete(di, devices);
229}
230
231static int logic16_dev_open(struct sr_dev_inst *sdi)
232{
233 struct sr_dev_driver *di;
234 libusb_device **devlist;
235 struct sr_usb_dev_inst *usb;
236 struct libusb_device_descriptor des;
237 struct drv_context *drvc;
238 int ret = SR_ERR, i, device_count;
239 char connection_id[64];
240
241 di = sdi->driver;
242 drvc = di->context;
243 usb = sdi->conn;
244
245 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
246 if (device_count < 0) {
247 sr_err("Failed to get device list: %s.",
248 libusb_error_name(device_count));
249 return SR_ERR;
250 }
251
252 for (i = 0; i < device_count; i++) {
253 libusb_get_device_descriptor(devlist[i], &des);
254
255 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
256 continue;
257
258 if ((sdi->status == SR_ST_INITIALIZING) ||
259 (sdi->status == SR_ST_INACTIVE)) {
260 /*
261 * Check device by its physical USB bus/port address.
262 */
263 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
264 if (strcmp(sdi->connection_id, connection_id))
265 /* This is not the one. */
266 continue;
267 }
268
269 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
270 if (usb->address == 0xff)
271 /*
272 * First time we touch this device after FW
273 * upload, so we don't know the address yet.
274 */
275 usb->address = libusb_get_device_address(devlist[i]);
276 } else {
277 sr_err("Failed to open device: %s.",
278 libusb_error_name(ret));
279 ret = SR_ERR;
280 break;
281 }
282
283 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
284 if (ret == LIBUSB_ERROR_BUSY) {
285 sr_err("Unable to claim USB interface. Another "
286 "program or driver has already claimed it.");
287 ret = SR_ERR;
288 break;
289 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
290 sr_err("Device has been disconnected.");
291 ret = SR_ERR;
292 break;
293 } else if (ret != 0) {
294 sr_err("Unable to claim interface: %s.",
295 libusb_error_name(ret));
296 ret = SR_ERR;
297 break;
298 }
299
300 if ((ret = logic16_init_device(sdi)) != SR_OK) {
301 sr_err("Failed to init device.");
302 break;
303 }
304
305 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
306 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
307
308 ret = SR_OK;
309
310 break;
311 }
312
313 libusb_free_device_list(devlist, 1);
314
315 if (ret != SR_OK) {
316 if (usb->devhdl) {
317 libusb_release_interface(usb->devhdl, USB_INTERFACE);
318 libusb_close(usb->devhdl);
319 usb->devhdl = NULL;
320 }
321 return SR_ERR;
322 }
323
324 return SR_OK;
325}
326
327static int dev_open(struct sr_dev_inst *sdi)
328{
329 struct dev_context *devc;
330 int ret;
331 int64_t timediff_us, timediff_ms;
332
333 devc = sdi->priv;
334
335 /*
336 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
337 * milliseconds for the FX2 to renumerate.
338 */
339 ret = SR_ERR;
340 if (devc->fw_updated > 0) {
341 sr_info("Waiting for device to reset.");
342 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
343 g_usleep(300 * 1000);
344 timediff_ms = 0;
345 while (timediff_ms < MAX_RENUM_DELAY_MS) {
346 if ((ret = logic16_dev_open(sdi)) == SR_OK)
347 break;
348 g_usleep(100 * 1000);
349
350 timediff_us = g_get_monotonic_time() - devc->fw_updated;
351 timediff_ms = timediff_us / 1000;
352 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
353 }
354 if (ret != SR_OK) {
355 sr_err("Device failed to renumerate.");
356 return SR_ERR;
357 }
358 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
359 } else {
360 sr_info("Firmware upload was not needed.");
361 ret = logic16_dev_open(sdi);
362 }
363
364 if (ret != SR_OK) {
365 sr_err("Unable to open device.");
366 return SR_ERR;
367 }
368
369 if (devc->cur_samplerate == 0) {
370 /* Samplerate hasn't been set; default to the slowest one. */
371 devc->cur_samplerate = samplerates[0];
372 }
373
374 return SR_OK;
375}
376
377static int dev_close(struct sr_dev_inst *sdi)
378{
379 struct sr_usb_dev_inst *usb;
380
381 usb = sdi->conn;
382
383 if (!usb->devhdl)
384 return SR_ERR_BUG;
385
386 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
387 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
388 libusb_release_interface(usb->devhdl, USB_INTERFACE);
389 libusb_close(usb->devhdl);
390 usb->devhdl = NULL;
391
392 return SR_OK;
393}
394
395static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
396 const struct sr_channel_group *cg)
397{
398 struct dev_context *devc;
399 struct sr_usb_dev_inst *usb;
400 GVariant *range[2];
401 char str[128];
402 int ret;
403 unsigned int i;
404
405 (void)cg;
406
407 ret = SR_OK;
408 switch (key) {
409 case SR_CONF_CONN:
410 if (!sdi || !sdi->conn)
411 return SR_ERR_ARG;
412 usb = sdi->conn;
413 if (usb->address == 255)
414 /* Device still needs to re-enumerate after firmware
415 * upload, so we don't know its (future) address. */
416 return SR_ERR;
417 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
418 *data = g_variant_new_string(str);
419 break;
420 case SR_CONF_SAMPLERATE:
421 if (!sdi)
422 return SR_ERR;
423 devc = sdi->priv;
424 *data = g_variant_new_uint64(devc->cur_samplerate);
425 break;
426 case SR_CONF_CAPTURE_RATIO:
427 if (!sdi)
428 return SR_ERR;
429 devc = sdi->priv;
430 *data = g_variant_new_uint64(devc->capture_ratio);
431 break;
432 case SR_CONF_VOLTAGE_THRESHOLD:
433 if (!sdi)
434 return SR_ERR;
435 devc = sdi->priv;
436 ret = SR_ERR;
437 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
438 if (devc->selected_voltage_range !=
439 volt_thresholds[i].range)
440 continue;
441 range[0] = g_variant_new_double(volt_thresholds[i].low);
442 range[1] = g_variant_new_double(volt_thresholds[i].high);
443 *data = g_variant_new_tuple(range, 2);
444 ret = SR_OK;
445 break;
446 }
447 break;
448 default:
449 return SR_ERR_NA;
450 }
451
452 return ret;
453}
454
455static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
456 const struct sr_channel_group *cg)
457{
458 struct dev_context *devc;
459 gdouble low, high;
460 int ret;
461 unsigned int i;
462
463 (void)cg;
464
465 devc = sdi->priv;
466
467 ret = SR_OK;
468 switch (key) {
469 case SR_CONF_SAMPLERATE:
470 devc->cur_samplerate = g_variant_get_uint64(data);
471 break;
472 case SR_CONF_LIMIT_SAMPLES:
473 devc->limit_samples = g_variant_get_uint64(data);
474 break;
475 case SR_CONF_CAPTURE_RATIO:
476 devc->capture_ratio = g_variant_get_uint64(data);
477 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
478 break;
479 case SR_CONF_VOLTAGE_THRESHOLD:
480 g_variant_get(data, "(dd)", &low, &high);
481 ret = SR_ERR_ARG;
482 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
483 if (fabs(volt_thresholds[i].low - low) < 0.1 &&
484 fabs(volt_thresholds[i].high - high) < 0.1) {
485 devc->selected_voltage_range =
486 volt_thresholds[i].range;
487 ret = SR_OK;
488 break;
489 }
490 }
491 break;
492 default:
493 ret = SR_ERR_NA;
494 }
495
496 return ret;
497}
498
499static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
500 const struct sr_channel_group *cg)
501{
502 GVariant *gvar, *range[2];
503 GVariantBuilder gvb;
504 int ret;
505 unsigned int i;
506
507 (void)sdi;
508 (void)cg;
509
510 ret = SR_OK;
511 switch (key) {
512 case SR_CONF_SCAN_OPTIONS:
513 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
514 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
515 break;
516 case SR_CONF_DEVICE_OPTIONS:
517 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
518 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
519 break;
520 case SR_CONF_SAMPLERATE:
521 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
522 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
523 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
524 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
525 *data = g_variant_builder_end(&gvb);
526 break;
527 case SR_CONF_VOLTAGE_THRESHOLD:
528 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
529 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
530 range[0] = g_variant_new_double(volt_thresholds[i].low);
531 range[1] = g_variant_new_double(volt_thresholds[i].high);
532 gvar = g_variant_new_tuple(range, 2);
533 g_variant_builder_add_value(&gvb, gvar);
534 }
535 *data = g_variant_builder_end(&gvb);
536 break;
537 case SR_CONF_TRIGGER_MATCH:
538 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
539 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
540 sizeof(int32_t));
541 break;
542 default:
543 return SR_ERR_NA;
544 }
545
546 return ret;
547}
548
549static void abort_acquisition(struct dev_context *devc)
550{
551 int i;
552
553 devc->sent_samples = -1;
554
555 for (i = devc->num_transfers - 1; i >= 0; i--) {
556 if (devc->transfers[i])
557 libusb_cancel_transfer(devc->transfers[i]);
558 }
559}
560
561static unsigned int bytes_per_ms(struct dev_context *devc)
562{
563 return devc->cur_samplerate * devc->num_channels / 8000;
564}
565
566static size_t get_buffer_size(struct dev_context *devc)
567{
568 size_t s;
569
570 /*
571 * The buffer should be large enough to hold 10ms of data and
572 * a multiple of 512.
573 */
574 s = 10 * bytes_per_ms(devc);
575 return (s + 511) & ~511;
576}
577
578static unsigned int get_number_of_transfers(struct dev_context *devc)
579{
580 unsigned int n;
581
582 /* Total buffer size should be able to hold about 500ms of data. */
583 n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
584
585 if (n > NUM_SIMUL_TRANSFERS)
586 return NUM_SIMUL_TRANSFERS;
587
588 return n;
589}
590
591static unsigned int get_timeout(struct dev_context *devc)
592{
593 size_t total_size;
594 unsigned int timeout;
595
596 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
597 timeout = total_size / bytes_per_ms(devc);
598 return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
599}
600
601static int configure_channels(const struct sr_dev_inst *sdi)
602{
603 struct dev_context *devc;
604 struct sr_channel *ch;
605 GSList *l;
606 uint16_t channel_bit;
607
608 devc = sdi->priv;
609
610 devc->cur_channels = 0;
611 devc->num_channels = 0;
612 for (l = sdi->channels; l; l = l->next) {
613 ch = (struct sr_channel *)l->data;
614 if (ch->enabled == FALSE)
615 continue;
616
617 channel_bit = 1 << (ch->index);
618
619 devc->cur_channels |= channel_bit;
620
621#ifdef WORDS_BIGENDIAN
622 /*
623 * Output logic data should be stored in little endian format.
624 * To speed things up during conversion, do the switcharoo
625 * here instead.
626 */
627 channel_bit = 1 << (ch->index ^ 8);
628#endif
629
630 devc->channel_masks[devc->num_channels++] = channel_bit;
631 }
632
633 return SR_OK;
634}
635
636static int receive_data(int fd, int revents, void *cb_data)
637{
638 struct timeval tv;
639 struct dev_context *devc;
640 struct drv_context *drvc;
641 const struct sr_dev_inst *sdi;
642 struct sr_dev_driver *di;
643
644 (void)fd;
645 (void)revents;
646
647 sdi = cb_data;
648 di = sdi->driver;
649 drvc = di->context;
650 devc = sdi->priv;
651
652 tv.tv_sec = tv.tv_usec = 0;
653 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
654
655 if (devc->sent_samples == -2) {
656 logic16_abort_acquisition(sdi);
657 abort_acquisition(devc);
658 }
659
660 return TRUE;
661}
662
663static int dev_acquisition_start(const struct sr_dev_inst *sdi)
664{
665 struct sr_dev_driver *di = sdi->driver;
666 struct dev_context *devc;
667 struct drv_context *drvc;
668 struct sr_usb_dev_inst *usb;
669 struct sr_trigger *trigger;
670 struct libusb_transfer *transfer;
671 unsigned int i, timeout, num_transfers;
672 int ret;
673 unsigned char *buf;
674 size_t size, convsize;
675
676 drvc = di->context;
677 devc = sdi->priv;
678 usb = sdi->conn;
679
680 /* Configures devc->cur_channels. */
681 if (configure_channels(sdi) != SR_OK) {
682 sr_err("Failed to configure channels.");
683 return SR_ERR;
684 }
685
686 devc->sent_samples = 0;
687 devc->empty_transfer_count = 0;
688 devc->cur_channel = 0;
689 memset(devc->channel_data, 0, sizeof(devc->channel_data));
690
691 if ((trigger = sr_session_trigger_get(sdi->session))) {
692 int pre_trigger_samples = 0;
693 if (devc->limit_samples > 0)
694 pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
695 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
696 if (!devc->stl)
697 return SR_ERR_MALLOC;
698 devc->trigger_fired = FALSE;
699 } else
700 devc->trigger_fired = TRUE;
701
702 timeout = get_timeout(devc);
703 num_transfers = get_number_of_transfers(devc);
704 size = get_buffer_size(devc);
705 convsize = (size / devc->num_channels + 2) * 16;
706 devc->submitted_transfers = 0;
707
708 devc->convbuffer_size = convsize;
709 if (!(devc->convbuffer = g_try_malloc(convsize))) {
710 sr_err("Conversion buffer malloc failed.");
711 return SR_ERR_MALLOC;
712 }
713
714 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
715 if (!devc->transfers) {
716 sr_err("USB transfers malloc failed.");
717 g_free(devc->convbuffer);
718 return SR_ERR_MALLOC;
719 }
720
721 if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
722 devc->cur_channels)) != SR_OK) {
723 g_free(devc->transfers);
724 g_free(devc->convbuffer);
725 return ret;
726 }
727
728 devc->num_transfers = num_transfers;
729 for (i = 0; i < num_transfers; i++) {
730 if (!(buf = g_try_malloc(size))) {
731 sr_err("USB transfer buffer malloc failed.");
732 if (devc->submitted_transfers)
733 abort_acquisition(devc);
734 else {
735 g_free(devc->transfers);
736 g_free(devc->convbuffer);
737 }
738 return SR_ERR_MALLOC;
739 }
740 transfer = libusb_alloc_transfer(0);
741 libusb_fill_bulk_transfer(transfer, usb->devhdl,
742 2 | LIBUSB_ENDPOINT_IN, buf, size,
743 logic16_receive_transfer, (void *)sdi, timeout);
744 if ((ret = libusb_submit_transfer(transfer)) != 0) {
745 sr_err("Failed to submit transfer: %s.",
746 libusb_error_name(ret));
747 libusb_free_transfer(transfer);
748 g_free(buf);
749 abort_acquisition(devc);
750 return SR_ERR;
751 }
752 devc->transfers[i] = transfer;
753 devc->submitted_transfers++;
754 }
755
756 devc->ctx = drvc->sr_ctx;
757
758 usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
759
760 std_session_send_df_header(sdi);
761
762 if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
763 abort_acquisition(devc);
764 return ret;
765 }
766
767 return SR_OK;
768}
769
770static int dev_acquisition_stop(struct sr_dev_inst *sdi)
771{
772 int ret;
773
774 ret = logic16_abort_acquisition(sdi);
775
776 abort_acquisition(sdi->priv);
777
778 return ret;
779}
780
781static struct sr_dev_driver saleae_logic16_driver_info = {
782 .name = "saleae-logic16",
783 .longname = "Saleae Logic16",
784 .api_version = 1,
785 .init = std_init,
786 .cleanup = std_cleanup,
787 .scan = scan,
788 .dev_list = std_dev_list,
789 .dev_clear = NULL,
790 .config_get = config_get,
791 .config_set = config_set,
792 .config_list = config_list,
793 .dev_open = dev_open,
794 .dev_close = dev_close,
795 .dev_acquisition_start = dev_acquisition_start,
796 .dev_acquisition_stop = dev_acquisition_stop,
797 .context = NULL,
798};
799SR_REGISTER_DEV_DRIVER(saleae_logic16_driver_info);
Hardware access and backend lib