]> sigrok.org Git - libsigrok.git/blame_incremental - src/hardware/saleae-logic16/api.c
projects / libsigrok.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Put driver pointers into special section
[libsigrok.git] / src / hardware / saleae-logic16 / api.c
... / ...
CommitLineData
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(25),
90 SR_MHZ(32),
91 SR_MHZ(40),
92 SR_MHZ(80),
93 SR_MHZ(100),
94};
95
96static gboolean check_conf_profile(libusb_device *dev)
97{
98 struct libusb_device_descriptor des;
99 struct libusb_device_handle *hdl;
100 gboolean ret;
101 unsigned char strdesc[64];
102
103 hdl = NULL;
104 ret = FALSE;
105 while (!ret) {
106 /* Assume the FW has not been loaded, unless proven wrong. */
107 libusb_get_device_descriptor(dev, &des);
108
109 if (libusb_open(dev, &hdl) != 0)
110 break;
111
112 if (libusb_get_string_descriptor_ascii(hdl,
113 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
114 break;
115 if (strcmp((const char *)strdesc, "Saleae LLC"))
116 break;
117
118 if (libusb_get_string_descriptor_ascii(hdl,
119 des.iProduct, strdesc, sizeof(strdesc)) < 0)
120 break;
121 if (strcmp((const char *)strdesc, "Logic S/16"))
122 break;
123
124 /* If we made it here, it must be a configured Logic16. */
125 ret = TRUE;
126 }
127 if (hdl)
128 libusb_close(hdl);
129
130 return ret;
131}
132
133static GSList *scan(struct sr_dev_driver *di, GSList *options)
134{
135 struct drv_context *drvc;
136 struct dev_context *devc;
137 struct sr_dev_inst *sdi;
138 struct sr_usb_dev_inst *usb;
139 struct sr_config *src;
140 GSList *l, *devices, *conn_devices;
141 struct libusb_device_descriptor des;
142 libusb_device **devlist;
143 unsigned int i, j;
144 const char *conn;
145 char connection_id[64];
146
147 drvc = di->context;
148
149 conn = NULL;
150 for (l = options; l; l = l->next) {
151 src = l->data;
152 switch (src->key) {
153 case SR_CONF_CONN:
154 conn = g_variant_get_string(src->data, NULL);
155 break;
156 }
157 }
158 if (conn)
159 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
160 else
161 conn_devices = NULL;
162
163 /* Find all Logic16 devices and upload firmware to them. */
164 devices = NULL;
165 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
166 for (i = 0; devlist[i]; i++) {
167 if (conn) {
168 usb = NULL;
169 for (l = conn_devices; l; l = l->next) {
170 usb = l->data;
171 if (usb->bus == libusb_get_bus_number(devlist[i])
172 && usb->address == libusb_get_device_address(devlist[i]))
173 break;
174 }
175 if (!l)
176 /* This device matched none of the ones that
177 * matched the conn specification. */
178 continue;
179 }
180
181 libusb_get_device_descriptor(devlist[i], &des);
182
183 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
184
185 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
186 continue;
187
188 sdi = g_malloc0(sizeof(struct sr_dev_inst));
189 sdi->status = SR_ST_INITIALIZING;
190 sdi->vendor = g_strdup("Saleae");
191 sdi->model = g_strdup("Logic16");
192 sdi->driver = di;
193 sdi->connection_id = g_strdup(connection_id);
194
195 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
196 sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
197 channel_names[j]);
198
199 devc = g_malloc0(sizeof(struct dev_context));
200 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
201 sdi->priv = devc;
202 drvc->instances = g_slist_append(drvc->instances, sdi);
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 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, i, device_count;
239 char connection_id[64];
240
241 di = sdi->driver;
242 drvc = di->context;
243 usb = sdi->conn;
244
245 if (sdi->status == SR_ST_ACTIVE)
246 /* Device is already in use. */
247 return SR_ERR;
248
249 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
250 if (device_count < 0) {
251 sr_err("Failed to get device list: %s.",
252 libusb_error_name(device_count));
253 return SR_ERR;
254 }
255
256 for (i = 0; i < device_count; i++) {
257 libusb_get_device_descriptor(devlist[i], &des);
258
259 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
260 continue;
261
262 if ((sdi->status == SR_ST_INITIALIZING) ||
263 (sdi->status == SR_ST_INACTIVE)) {
264 /*
265 * Check device by its physical USB bus/port address.
266 */
267 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
268 if (strcmp(sdi->connection_id, connection_id))
269 /* This is not the one. */
270 continue;
271 }
272
273 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
274 if (usb->address == 0xff)
275 /*
276 * First time we touch this device after FW
277 * upload, so we don't know the address yet.
278 */
279 usb->address = libusb_get_device_address(devlist[i]);
280 } else {
281 sr_err("Failed to open device: %s.",
282 libusb_error_name(ret));
283 break;
284 }
285
286 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
287 if (ret == LIBUSB_ERROR_BUSY) {
288 sr_err("Unable to claim USB interface. Another "
289 "program or driver has already claimed it.");
290 break;
291 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
292 sr_err("Device has been disconnected.");
293 break;
294 } else if (ret != 0) {
295 sr_err("Unable to claim interface: %s.",
296 libusb_error_name(ret));
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 sdi->status = SR_ST_ACTIVE;
306 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
307 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
308
309 break;
310 }
311 libusb_free_device_list(devlist, 1);
312
313 if (sdi->status != SR_ST_ACTIVE) {
314 if (usb->devhdl) {
315 libusb_release_interface(usb->devhdl, USB_INTERFACE);
316 libusb_close(usb->devhdl);
317 usb->devhdl = NULL;
318 }
319 return SR_ERR;
320 }
321
322 return SR_OK;
323}
324
325static int dev_open(struct sr_dev_inst *sdi)
326{
327 struct dev_context *devc;
328 int ret;
329 int64_t timediff_us, timediff_ms;
330
331 devc = sdi->priv;
332
333 /*
334 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
335 * milliseconds for the FX2 to renumerate.
336 */
337 ret = SR_ERR;
338 if (devc->fw_updated > 0) {
339 sr_info("Waiting for device to reset.");
340 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
341 g_usleep(300 * 1000);
342 timediff_ms = 0;
343 while (timediff_ms < MAX_RENUM_DELAY_MS) {
344 if ((ret = logic16_dev_open(sdi)) == SR_OK)
345 break;
346 g_usleep(100 * 1000);
347
348 timediff_us = g_get_monotonic_time() - devc->fw_updated;
349 timediff_ms = timediff_us / 1000;
350 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
351 }
352 if (ret != SR_OK) {
353 sr_err("Device failed to renumerate.");
354 return SR_ERR;
355 }
356 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
357 } else {
358 sr_info("Firmware upload was not needed.");
359 ret = logic16_dev_open(sdi);
360 }
361
362 if (ret != SR_OK) {
363 sr_err("Unable to open device.");
364 return SR_ERR;
365 }
366
367 if (devc->cur_samplerate == 0) {
368 /* Samplerate hasn't been set; default to the slowest one. */
369 devc->cur_samplerate = samplerates[0];
370 }
371
372 return SR_OK;
373}
374
375static int dev_close(struct sr_dev_inst *sdi)
376{
377 struct sr_usb_dev_inst *usb;
378
379 usb = sdi->conn;
380 if (!usb->devhdl)
381 return SR_ERR;
382
383 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
384 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
385 libusb_release_interface(usb->devhdl, USB_INTERFACE);
386 libusb_close(usb->devhdl);
387 usb->devhdl = NULL;
388 sdi->status = SR_ST_INACTIVE;
389
390 return SR_OK;
391}
392
393static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
394 const struct sr_channel_group *cg)
395{
396 struct dev_context *devc;
397 struct sr_usb_dev_inst *usb;
398 GVariant *range[2];
399 char str[128];
400 int ret;
401 unsigned int i;
402
403 (void)cg;
404
405 ret = SR_OK;
406 switch (key) {
407 case SR_CONF_CONN:
408 if (!sdi || !sdi->conn)
409 return SR_ERR_ARG;
410 usb = sdi->conn;
411 if (usb->address == 255)
412 /* Device still needs to re-enumerate after firmware
413 * upload, so we don't know its (future) address. */
414 return SR_ERR;
415 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
416 *data = g_variant_new_string(str);
417 break;
418 case SR_CONF_SAMPLERATE:
419 if (!sdi)
420 return SR_ERR;
421 devc = sdi->priv;
422 *data = g_variant_new_uint64(devc->cur_samplerate);
423 break;
424 case SR_CONF_CAPTURE_RATIO:
425 if (!sdi)
426 return SR_ERR;
427 devc = sdi->priv;
428 *data = g_variant_new_uint64(devc->capture_ratio);
429 break;
430 case SR_CONF_VOLTAGE_THRESHOLD:
431 if (!sdi)
432 return SR_ERR;
433 devc = sdi->priv;
434 ret = SR_ERR;
435 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
436 if (devc->selected_voltage_range !=
437 volt_thresholds[i].range)
438 continue;
439 range[0] = g_variant_new_double(volt_thresholds[i].low);
440 range[1] = g_variant_new_double(volt_thresholds[i].high);
441 *data = g_variant_new_tuple(range, 2);
442 ret = SR_OK;
443 break;
444 }
445 break;
446 default:
447 return SR_ERR_NA;
448 }
449
450 return ret;
451}
452
453static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
454 const struct sr_channel_group *cg)
455{
456 struct dev_context *devc;
457 gdouble low, high;
458 int ret;
459 unsigned int i;
460
461 (void)cg;
462
463 if (sdi->status != SR_ST_ACTIVE)
464 return SR_ERR_DEV_CLOSED;
465
466 devc = sdi->priv;
467
468 ret = SR_OK;
469 switch (key) {
470 case SR_CONF_SAMPLERATE:
471 devc->cur_samplerate = g_variant_get_uint64(data);
472 break;
473 case SR_CONF_LIMIT_SAMPLES:
474 devc->limit_samples = g_variant_get_uint64(data);
475 break;
476 case SR_CONF_CAPTURE_RATIO:
477 devc->capture_ratio = g_variant_get_uint64(data);
478 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
479 break;
480 case SR_CONF_VOLTAGE_THRESHOLD:
481 g_variant_get(data, "(dd)", &low, &high);
482 ret = SR_ERR_ARG;
483 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
484 if (fabs(volt_thresholds[i].low - low) < 0.1 &&
485 fabs(volt_thresholds[i].high - high) < 0.1) {
486 devc->selected_voltage_range =
487 volt_thresholds[i].range;
488 ret = SR_OK;
489 break;
490 }
491 }
492 break;
493 default:
494 ret = SR_ERR_NA;
495 }
496
497 return ret;
498}
499
500static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
501 const struct sr_channel_group *cg)
502{
503 GVariant *gvar, *range[2];
504 GVariantBuilder gvb;
505 int ret;
506 unsigned int i;
507
508 (void)sdi;
509 (void)cg;
510
511 ret = SR_OK;
512 switch (key) {
513 case SR_CONF_SCAN_OPTIONS:
514 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
515 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
516 break;
517 case SR_CONF_DEVICE_OPTIONS:
518 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
519 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
520 break;
521 case SR_CONF_SAMPLERATE:
522 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
523 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
524 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
525 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
526 *data = g_variant_builder_end(&gvb);
527 break;
528 case SR_CONF_VOLTAGE_THRESHOLD:
529 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
530 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
531 range[0] = g_variant_new_double(volt_thresholds[i].low);
532 range[1] = g_variant_new_double(volt_thresholds[i].high);
533 gvar = g_variant_new_tuple(range, 2);
534 g_variant_builder_add_value(&gvb, gvar);
535 }
536 *data = g_variant_builder_end(&gvb);
537 break;
538 case SR_CONF_TRIGGER_MATCH:
539 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
540 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
541 sizeof(int32_t));
542 break;
543 default:
544 return SR_ERR_NA;
545 }
546
547 return ret;
548}
549
550static void abort_acquisition(struct dev_context *devc)
551{
552 int i;
553
554 devc->sent_samples = -1;
555
556 for (i = devc->num_transfers - 1; i >= 0; i--) {
557 if (devc->transfers[i])
558 libusb_cancel_transfer(devc->transfers[i]);
559 }
560}
561
562static unsigned int bytes_per_ms(struct dev_context *devc)
563{
564 return devc->cur_samplerate * devc->num_channels / 8000;
565}
566
567static size_t get_buffer_size(struct dev_context *devc)
568{
569 size_t s;
570
571 /*
572 * The buffer should be large enough to hold 10ms of data and
573 * a multiple of 512.
574 */
575 s = 10 * bytes_per_ms(devc);
576 return (s + 511) & ~511;
577}
578
579static unsigned int get_number_of_transfers(struct dev_context *devc)
580{
581 unsigned int n;
582
583 /* Total buffer size should be able to hold about 500ms of data. */
584 n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
585
586 if (n > NUM_SIMUL_TRANSFERS)
587 return NUM_SIMUL_TRANSFERS;
588
589 return n;
590}
591
592static unsigned int get_timeout(struct dev_context *devc)
593{
594 size_t total_size;
595 unsigned int timeout;
596
597 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
598 timeout = total_size / bytes_per_ms(devc);
599 return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
600}
601
602static int configure_channels(const struct sr_dev_inst *sdi)
603{
604 struct dev_context *devc;
605 struct sr_channel *ch;
606 GSList *l;
607 uint16_t channel_bit;
608
609 devc = sdi->priv;
610
611 devc->cur_channels = 0;
612 devc->num_channels = 0;
613 for (l = sdi->channels; l; l = l->next) {
614 ch = (struct sr_channel *)l->data;
615 if (ch->enabled == FALSE)
616 continue;
617
618 channel_bit = 1 << (ch->index);
619
620 devc->cur_channels |= channel_bit;
621
622#ifdef WORDS_BIGENDIAN
623 /*
624 * Output logic data should be stored in little endian format.
625 * To speed things up during conversion, do the switcharoo
626 * here instead.
627 */
628 channel_bit = 1 << (ch->index ^ 8);
629#endif
630
631 devc->channel_masks[devc->num_channels++] = channel_bit;
632 }
633
634 return SR_OK;
635}
636
637static int receive_data(int fd, int revents, void *cb_data)
638{
639 struct timeval tv;
640 struct dev_context *devc;
641 struct drv_context *drvc;
642 const struct sr_dev_inst *sdi;
643 struct sr_dev_driver *di;
644
645 (void)fd;
646 (void)revents;
647
648 sdi = cb_data;
649 di = sdi->driver;
650 drvc = di->context;
651 devc = sdi->priv;
652
653 tv.tv_sec = tv.tv_usec = 0;
654 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
655
656 if (devc->sent_samples == -2) {
657 logic16_abort_acquisition(sdi);
658 abort_acquisition(devc);
659 }
660
661 return TRUE;
662}
663
664static int dev_acquisition_start(const struct sr_dev_inst *sdi)
665{
666 struct sr_dev_driver *di = sdi->driver;
667 struct dev_context *devc;
668 struct drv_context *drvc;
669 struct sr_usb_dev_inst *usb;
670 struct sr_trigger *trigger;
671 struct libusb_transfer *transfer;
672 unsigned int i, timeout, num_transfers;
673 int ret;
674 unsigned char *buf;
675 size_t size, convsize;
676
677 if (sdi->status != SR_ST_ACTIVE)
678 return SR_ERR_DEV_CLOSED;
679
680 drvc = di->context;
681 devc = sdi->priv;
682 usb = sdi->conn;
683
684 /* Configures devc->cur_channels. */
685 if (configure_channels(sdi) != SR_OK) {
686 sr_err("Failed to configure channels.");
687 return SR_ERR;
688 }
689
690 devc->sent_samples = 0;
691 devc->empty_transfer_count = 0;
692 devc->cur_channel = 0;
693 memset(devc->channel_data, 0, sizeof(devc->channel_data));
694
695 if ((trigger = sr_session_trigger_get(sdi->session))) {
696 int pre_trigger_samples = 0;
697 if (devc->limit_samples > 0)
698 pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
699 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
700 if (!devc->stl)
701 return SR_ERR_MALLOC;
702 devc->trigger_fired = FALSE;
703 } else
704 devc->trigger_fired = TRUE;
705
706 timeout = get_timeout(devc);
707 num_transfers = get_number_of_transfers(devc);
708 size = get_buffer_size(devc);
709 convsize = (size / devc->num_channels + 2) * 16;
710 devc->submitted_transfers = 0;
711
712 devc->convbuffer_size = convsize;
713 if (!(devc->convbuffer = g_try_malloc(convsize))) {
714 sr_err("Conversion buffer malloc failed.");
715 return SR_ERR_MALLOC;
716 }
717
718 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
719 if (!devc->transfers) {
720 sr_err("USB transfers malloc failed.");
721 g_free(devc->convbuffer);
722 return SR_ERR_MALLOC;
723 }
724
725 if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
726 devc->cur_channels)) != SR_OK) {
727 g_free(devc->transfers);
728 g_free(devc->convbuffer);
729 return ret;
730 }
731
732 devc->num_transfers = num_transfers;
733 for (i = 0; i < num_transfers; i++) {
734 if (!(buf = g_try_malloc(size))) {
735 sr_err("USB transfer buffer malloc failed.");
736 if (devc->submitted_transfers)
737 abort_acquisition(devc);
738 else {
739 g_free(devc->transfers);
740 g_free(devc->convbuffer);
741 }
742 return SR_ERR_MALLOC;
743 }
744 transfer = libusb_alloc_transfer(0);
745 libusb_fill_bulk_transfer(transfer, usb->devhdl,
746 2 | LIBUSB_ENDPOINT_IN, buf, size,
747 logic16_receive_transfer, (void *)sdi, timeout);
748 if ((ret = libusb_submit_transfer(transfer)) != 0) {
749 sr_err("Failed to submit transfer: %s.",
750 libusb_error_name(ret));
751 libusb_free_transfer(transfer);
752 g_free(buf);
753 abort_acquisition(devc);
754 return SR_ERR;
755 }
756 devc->transfers[i] = transfer;
757 devc->submitted_transfers++;
758 }
759
760 devc->ctx = drvc->sr_ctx;
761
762 usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
763
764 std_session_send_df_header(sdi, LOG_PREFIX);
765
766 if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
767 abort_acquisition(devc);
768 return ret;
769 }
770
771 return SR_OK;
772}
773
774static int dev_acquisition_stop(struct sr_dev_inst *sdi)
775{
776 int ret;
777
778 if (sdi->status != SR_ST_ACTIVE)
779 return SR_ERR_DEV_CLOSED;
780
781 ret = logic16_abort_acquisition(sdi);
782
783 abort_acquisition(sdi->priv);
784
785 return ret;
786}
787
788static struct sr_dev_driver saleae_logic16_driver_info = {
789 .name = "saleae-logic16",
790 .longname = "Saleae Logic16",
791 .api_version = 1,
792 .init = std_init,
793 .cleanup = std_cleanup,
794 .scan = scan,
795 .dev_list = std_dev_list,
796 .dev_clear = NULL,
797 .config_get = config_get,
798 .config_set = config_set,
799 .config_list = config_list,
800 .dev_open = dev_open,
801 .dev_close = dev_close,
802 .dev_acquisition_start = dev_acquisition_start,
803 .dev_acquisition_stop = dev_acquisition_stop,
804 .context = NULL,
805};
806SR_REGISTER_DEV_DRIVER(saleae_logic16_driver_info);
Hardware access and backend lib