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Change sr_dev_inst_new() to take no parameters.
[libsigrok.git] / src / hardware / saleae-logic16 / api.c
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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 <glib.h>
23#include <libusb.h>
24#include <stdlib.h>
25#include <string.h>
26#include <math.h>
27#include "libsigrok.h"
28#include "libsigrok-internal.h"
29#include "protocol.h"
30
31#define LOGIC16_VID 0x21a9
32#define LOGIC16_PID 0x1001
33
34#define USB_INTERFACE 0
35#define USB_CONFIGURATION 1
36#define FX2_FIRMWARE FIRMWARE_DIR "/saleae-logic16-fx2.fw"
37
38#define MAX_RENUM_DELAY_MS 3000
39#define NUM_SIMUL_TRANSFERS 32
40
41SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
42static struct sr_dev_driver *di = &saleae_logic16_driver_info;
43
44static const uint32_t scanopts[] = {
45 SR_CONF_CONN,
46};
47
48static const uint32_t devopts[] = {
49 SR_CONF_LOGIC_ANALYZER,
50 SR_CONF_CONTINUOUS,
51 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
52 SR_CONF_CONN | SR_CONF_GET,
53 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
54 SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
55 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
56};
57
58static const int32_t soft_trigger_matches[] = {
59 SR_TRIGGER_ZERO,
60 SR_TRIGGER_ONE,
61 SR_TRIGGER_RISING,
62 SR_TRIGGER_FALLING,
63 SR_TRIGGER_EDGE,
64};
65
66static const char *channel_names[] = {
67 "0", "1", "2", "3", "4", "5", "6", "7", "8",
68 "9", "10", "11", "12", "13", "14", "15",
69 NULL,
70};
71
72static const struct {
73 enum voltage_range range;
74 gdouble low;
75 gdouble high;
76} volt_thresholds[] = {
77 { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
78 { VOLTAGE_RANGE_5_V, 1.4, 3.6 },
79};
80
81static const uint64_t samplerates[] = {
82 SR_KHZ(500),
83 SR_MHZ(1),
84 SR_MHZ(2),
85 SR_MHZ(4),
86 SR_MHZ(5),
87 SR_MHZ(8),
88 SR_MHZ(10),
89 SR_KHZ(12500),
90 SR_MHZ(16),
91 SR_MHZ(25),
92 SR_MHZ(32),
93 SR_MHZ(40),
94 SR_MHZ(80),
95 SR_MHZ(100),
96};
97
98static int init(struct sr_context *sr_ctx)
99{
100 return std_init(sr_ctx, di, LOG_PREFIX);
101}
102
103static gboolean check_conf_profile(libusb_device *dev)
104{
105 struct libusb_device_descriptor des;
106 struct libusb_device_handle *hdl;
107 gboolean ret;
108 unsigned char strdesc[64];
109
110 hdl = NULL;
111 ret = FALSE;
112 while (!ret) {
113 /* Assume the FW has not been loaded, unless proven wrong. */
114 if (libusb_get_device_descriptor(dev, &des) != 0)
115 break;
116
117 if (libusb_open(dev, &hdl) != 0)
118 break;
119
120 if (libusb_get_string_descriptor_ascii(hdl,
121 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
122 break;
123 if (strcmp((const char *)strdesc, "Saleae LLC"))
124 break;
125
126 if (libusb_get_string_descriptor_ascii(hdl,
127 des.iProduct, strdesc, sizeof(strdesc)) < 0)
128 break;
129 if (strcmp((const char *)strdesc, "Logic S/16"))
130 break;
131
132 /* If we made it here, it must be a configured Logic16. */
133 ret = TRUE;
134 }
135 if (hdl)
136 libusb_close(hdl);
137
138 return ret;
139}
140
141static GSList *scan(GSList *options)
142{
143 struct drv_context *drvc;
144 struct dev_context *devc;
145 struct sr_dev_inst *sdi;
146 struct sr_usb_dev_inst *usb;
147 struct sr_channel *ch;
148 struct sr_config *src;
149 GSList *l, *devices, *conn_devices;
150 struct libusb_device_descriptor des;
151 libusb_device **devlist;
152 int ret, i, j;
153 const char *conn;
154 char connection_id[64];
155
156 drvc = di->priv;
157
158 conn = NULL;
159 for (l = options; l; l = l->next) {
160 src = l->data;
161 switch (src->key) {
162 case SR_CONF_CONN:
163 conn = g_variant_get_string(src->data, NULL);
164 break;
165 }
166 }
167 if (conn)
168 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
169 else
170 conn_devices = NULL;
171
172 /* Find all Logic16 devices and upload firmware to them. */
173 devices = NULL;
174 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
175 for (i = 0; devlist[i]; i++) {
176 if (conn) {
177 usb = NULL;
178 for (l = conn_devices; l; l = l->next) {
179 usb = l->data;
180 if (usb->bus == libusb_get_bus_number(devlist[i])
181 && usb->address == libusb_get_device_address(devlist[i]))
182 break;
183 }
184 if (!l)
185 /* This device matched none of the ones that
186 * matched the conn specification. */
187 continue;
188 }
189
190 if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
191 sr_warn("Failed to get device descriptor: %s.",
192 libusb_error_name(ret));
193 continue;
194 }
195
196 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
197
198 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
199 continue;
200
201 sdi = sr_dev_inst_new();
202 sdi->status = SR_ST_INITIALIZING;
203 sdi->vendor = g_strdup("Saleae");
204 sdi->model = g_strdup("Logic16");
205 sdi->driver = di;
206 sdi->connection_id = g_strdup(connection_id);
207
208 for (j = 0; channel_names[j]; j++) {
209 if (!(ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
210 channel_names[j])))
211 return NULL;
212 sdi->channels = g_slist_append(sdi->channels, ch);
213 }
214
215 if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
216 return NULL;
217 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
218 sdi->priv = devc;
219 drvc->instances = g_slist_append(drvc->instances, sdi);
220 devices = g_slist_append(devices, sdi);
221
222 if (check_conf_profile(devlist[i])) {
223 /* Already has the firmware, so fix the new address. */
224 sr_dbg("Found a Logic16 device.");
225 sdi->status = SR_ST_INACTIVE;
226 sdi->inst_type = SR_INST_USB;
227 sdi->conn = sr_usb_dev_inst_new(
228 libusb_get_bus_number(devlist[i]),
229 libusb_get_device_address(devlist[i]), NULL);
230 } else {
231 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
232 FX2_FIRMWARE) == SR_OK)
233 /* Store when this device's FW was updated. */
234 devc->fw_updated = g_get_monotonic_time();
235 else
236 sr_err("Firmware upload failed.");
237 sdi->inst_type = SR_INST_USB;
238 sdi->conn = sr_usb_dev_inst_new(
239 libusb_get_bus_number(devlist[i]), 0xff, NULL);
240 }
241 }
242 libusb_free_device_list(devlist, 1);
243 g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
244
245 return devices;
246}
247
248static GSList *dev_list(void)
249{
250 return ((struct drv_context *)(di->priv))->instances;
251}
252
253static int logic16_dev_open(struct sr_dev_inst *sdi)
254{
255 libusb_device **devlist;
256 struct sr_usb_dev_inst *usb;
257 struct libusb_device_descriptor des;
258 struct drv_context *drvc;
259 int ret, i, device_count;
260 char connection_id[64];
261
262 drvc = di->priv;
263 usb = sdi->conn;
264
265 if (sdi->status == SR_ST_ACTIVE)
266 /* Device is already in use. */
267 return SR_ERR;
268
269 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
270 if (device_count < 0) {
271 sr_err("Failed to get device list: %s.",
272 libusb_error_name(device_count));
273 return SR_ERR;
274 }
275
276 for (i = 0; i < device_count; i++) {
277 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
278 sr_err("Failed to get device descriptor: %s.",
279 libusb_error_name(ret));
280 continue;
281 }
282
283 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
284 continue;
285
286 if ((sdi->status == SR_ST_INITIALIZING) ||
287 (sdi->status == SR_ST_INACTIVE)) {
288 /*
289 * Check device by its physical USB bus/port address.
290 */
291 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
292 if (strcmp(sdi->connection_id, connection_id))
293 /* This is not the one. */
294 continue;
295 }
296
297 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
298 if (usb->address == 0xff)
299 /*
300 * First time we touch this device after FW
301 * upload, so we don't know the address yet.
302 */
303 usb->address = libusb_get_device_address(devlist[i]);
304 } else {
305 sr_err("Failed to open device: %s.",
306 libusb_error_name(ret));
307 break;
308 }
309
310 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
311 if (ret == LIBUSB_ERROR_BUSY) {
312 sr_err("Unable to claim USB interface. Another "
313 "program or driver has already claimed it.");
314 break;
315 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
316 sr_err("Device has been disconnected.");
317 break;
318 } else if (ret != 0) {
319 sr_err("Unable to claim interface: %s.",
320 libusb_error_name(ret));
321 break;
322 }
323
324 if ((ret = logic16_init_device(sdi)) != SR_OK) {
325 sr_err("Failed to init device.");
326 break;
327 }
328
329 sdi->status = SR_ST_ACTIVE;
330 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
331 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
332
333 break;
334 }
335 libusb_free_device_list(devlist, 1);
336
337 if (sdi->status != SR_ST_ACTIVE) {
338 if (usb->devhdl) {
339 libusb_release_interface(usb->devhdl, USB_INTERFACE);
340 libusb_close(usb->devhdl);
341 usb->devhdl = NULL;
342 }
343 return SR_ERR;
344 }
345
346 return SR_OK;
347}
348
349static int dev_open(struct sr_dev_inst *sdi)
350{
351 struct dev_context *devc;
352 int ret;
353 int64_t timediff_us, timediff_ms;
354
355 devc = sdi->priv;
356
357 /*
358 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
359 * milliseconds for the FX2 to renumerate.
360 */
361 ret = SR_ERR;
362 if (devc->fw_updated > 0) {
363 sr_info("Waiting for device to reset.");
364 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
365 g_usleep(300 * 1000);
366 timediff_ms = 0;
367 while (timediff_ms < MAX_RENUM_DELAY_MS) {
368 if ((ret = logic16_dev_open(sdi)) == SR_OK)
369 break;
370 g_usleep(100 * 1000);
371
372 timediff_us = g_get_monotonic_time() - devc->fw_updated;
373 timediff_ms = timediff_us / 1000;
374 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
375 }
376 if (ret != SR_OK) {
377 sr_err("Device failed to renumerate.");
378 return SR_ERR;
379 }
380 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
381 } else {
382 sr_info("Firmware upload was not needed.");
383 ret = logic16_dev_open(sdi);
384 }
385
386 if (ret != SR_OK) {
387 sr_err("Unable to open device.");
388 return SR_ERR;
389 }
390
391 if (devc->cur_samplerate == 0) {
392 /* Samplerate hasn't been set; default to the slowest one. */
393 devc->cur_samplerate = samplerates[0];
394 }
395
396 return SR_OK;
397}
398
399static int dev_close(struct sr_dev_inst *sdi)
400{
401 struct sr_usb_dev_inst *usb;
402
403 usb = sdi->conn;
404 if (usb->devhdl == NULL)
405 return SR_ERR;
406
407 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
408 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
409 libusb_release_interface(usb->devhdl, USB_INTERFACE);
410 libusb_close(usb->devhdl);
411 usb->devhdl = NULL;
412 sdi->status = SR_ST_INACTIVE;
413
414 return SR_OK;
415}
416
417static int cleanup(void)
418{
419 int ret;
420 struct drv_context *drvc;
421
422 if (!(drvc = di->priv))
423 /* Can get called on an unused driver, doesn't matter. */
424 return SR_OK;
425
426 ret = std_dev_clear(di, NULL);
427 g_free(drvc);
428 di->priv = NULL;
429
430 return ret;
431}
432
433static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
434 const struct sr_channel_group *cg)
435{
436 struct dev_context *devc;
437 struct sr_usb_dev_inst *usb;
438 GVariant *range[2];
439 char str[128];
440 int ret;
441 unsigned int i;
442
443 (void)cg;
444
445 ret = SR_OK;
446 switch (key) {
447 case SR_CONF_CONN:
448 if (!sdi || !sdi->conn)
449 return SR_ERR_ARG;
450 usb = sdi->conn;
451 if (usb->address == 255)
452 /* Device still needs to re-enumerate after firmware
453 * upload, so we don't know its (future) address. */
454 return SR_ERR;
455 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
456 *data = g_variant_new_string(str);
457 break;
458 case SR_CONF_SAMPLERATE:
459 if (!sdi)
460 return SR_ERR;
461 devc = sdi->priv;
462 *data = g_variant_new_uint64(devc->cur_samplerate);
463 break;
464 case SR_CONF_VOLTAGE_THRESHOLD:
465 if (!sdi)
466 return SR_ERR;
467 devc = sdi->priv;
468 ret = SR_ERR;
469 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
470 if (devc->selected_voltage_range !=
471 volt_thresholds[i].range)
472 continue;
473 range[0] = g_variant_new_double(volt_thresholds[i].low);
474 range[1] = g_variant_new_double(volt_thresholds[i].high);
475 *data = g_variant_new_tuple(range, 2);
476 ret = SR_OK;
477 break;
478 }
479 break;
480 default:
481 return SR_ERR_NA;
482 }
483
484 return ret;
485}
486
487static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
488 const struct sr_channel_group *cg)
489{
490 struct dev_context *devc;
491 gdouble low, high;
492 int ret;
493 unsigned int i;
494
495 (void)cg;
496
497 if (sdi->status != SR_ST_ACTIVE)
498 return SR_ERR_DEV_CLOSED;
499
500 devc = sdi->priv;
501
502 ret = SR_OK;
503 switch (key) {
504 case SR_CONF_SAMPLERATE:
505 devc->cur_samplerate = g_variant_get_uint64(data);
506 break;
507 case SR_CONF_LIMIT_SAMPLES:
508 devc->limit_samples = g_variant_get_uint64(data);
509 break;
510 case SR_CONF_VOLTAGE_THRESHOLD:
511 g_variant_get(data, "(dd)", &low, &high);
512 ret = SR_ERR_ARG;
513 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
514 if (fabs(volt_thresholds[i].low - low) < 0.1 &&
515 fabs(volt_thresholds[i].high - high) < 0.1) {
516 devc->selected_voltage_range =
517 volt_thresholds[i].range;
518 ret = SR_OK;
519 break;
520 }
521 }
522 break;
523 default:
524 ret = SR_ERR_NA;
525 }
526
527 return ret;
528}
529
530static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
531 const struct sr_channel_group *cg)
532{
533 GVariant *gvar, *range[2];
534 GVariantBuilder gvb;
535 int ret;
536 unsigned int i;
537
538 (void)sdi;
539 (void)cg;
540
541 ret = SR_OK;
542 switch (key) {
543 case SR_CONF_SCAN_OPTIONS:
544 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
545 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
546 break;
547 case SR_CONF_DEVICE_OPTIONS:
548 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
549 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
550 break;
551 case SR_CONF_SAMPLERATE:
552 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
553 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
554 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
555 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
556 *data = g_variant_builder_end(&gvb);
557 break;
558 case SR_CONF_VOLTAGE_THRESHOLD:
559 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
560 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
561 range[0] = g_variant_new_double(volt_thresholds[i].low);
562 range[1] = g_variant_new_double(volt_thresholds[i].high);
563 gvar = g_variant_new_tuple(range, 2);
564 g_variant_builder_add_value(&gvb, gvar);
565 }
566 *data = g_variant_builder_end(&gvb);
567 break;
568 case SR_CONF_TRIGGER_MATCH:
569 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
570 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
571 sizeof(int32_t));
572 break;
573 default:
574 return SR_ERR_NA;
575 }
576
577 return ret;
578}
579
580static void abort_acquisition(struct dev_context *devc)
581{
582 int i;
583
584 devc->sent_samples = -1;
585
586 for (i = devc->num_transfers - 1; i >= 0; i--) {
587 if (devc->transfers[i])
588 libusb_cancel_transfer(devc->transfers[i]);
589 }
590}
591
592static unsigned int bytes_per_ms(struct dev_context *devc)
593{
594 return devc->cur_samplerate * devc->num_channels / 8000;
595}
596
597static size_t get_buffer_size(struct dev_context *devc)
598{
599 size_t s;
600
601 /*
602 * The buffer should be large enough to hold 10ms of data and
603 * a multiple of 512.
604 */
605 s = 10 * bytes_per_ms(devc);
606 return (s + 511) & ~511;
607}
608
609static unsigned int get_number_of_transfers(struct dev_context *devc)
610{
611 unsigned int n;
612
613 /* Total buffer size should be able to hold about 500ms of data. */
614 n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
615
616 if (n > NUM_SIMUL_TRANSFERS)
617 return NUM_SIMUL_TRANSFERS;
618
619 return n;
620}
621
622static unsigned int get_timeout(struct dev_context *devc)
623{
624 size_t total_size;
625 unsigned int timeout;
626
627 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
628 timeout = total_size / bytes_per_ms(devc);
629 return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
630}
631
632static int configure_channels(const struct sr_dev_inst *sdi)
633{
634 struct dev_context *devc;
635 struct sr_channel *ch;
636 GSList *l;
637 uint16_t channel_bit;
638
639 devc = sdi->priv;
640
641 devc->cur_channels = 0;
642 devc->num_channels = 0;
643 for (l = sdi->channels; l; l = l->next) {
644 ch = (struct sr_channel *)l->data;
645 if (ch->enabled == FALSE)
646 continue;
647
648 channel_bit = 1 << (ch->index);
649
650 devc->cur_channels |= channel_bit;
651
652#ifdef WORDS_BIGENDIAN
653 /*
654 * Output logic data should be stored in little endian format.
655 * To speed things up during conversion, do the switcharoo
656 * here instead.
657 */
658 channel_bit = 1 << (ch->index ^ 8);
659#endif
660
661 devc->channel_masks[devc->num_channels++] = channel_bit;
662 }
663
664 return SR_OK;
665}
666
667static int receive_data(int fd, int revents, void *cb_data)
668{
669 struct timeval tv;
670 struct dev_context *devc;
671 struct drv_context *drvc;
672 const struct sr_dev_inst *sdi;
673
674 (void)fd;
675 (void)revents;
676
677 sdi = cb_data;
678 drvc = di->priv;
679 devc = sdi->priv;
680
681 tv.tv_sec = tv.tv_usec = 0;
682 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
683
684 if (devc->sent_samples == -2) {
685 logic16_abort_acquisition(sdi);
686 abort_acquisition(devc);
687 }
688
689 return TRUE;
690}
691
692static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
693{
694 struct dev_context *devc;
695 struct drv_context *drvc;
696 struct sr_usb_dev_inst *usb;
697 struct sr_trigger *trigger;
698 struct libusb_transfer *transfer;
699 unsigned int i, timeout, num_transfers;
700 int ret;
701 unsigned char *buf;
702 size_t size, convsize;
703
704 if (sdi->status != SR_ST_ACTIVE)
705 return SR_ERR_DEV_CLOSED;
706
707 drvc = di->priv;
708 devc = sdi->priv;
709 usb = sdi->conn;
710
711 /* Configures devc->cur_channels. */
712 if (configure_channels(sdi) != SR_OK) {
713 sr_err("Failed to configure channels.");
714 return SR_ERR;
715 }
716
717 devc->cb_data = cb_data;
718 devc->sent_samples = 0;
719 devc->empty_transfer_count = 0;
720 devc->cur_channel = 0;
721 memset(devc->channel_data, 0, sizeof(devc->channel_data));
722
723 if ((trigger = sr_session_trigger_get(sdi->session))) {
724 devc->stl = soft_trigger_logic_new(sdi, trigger);
725 devc->trigger_fired = FALSE;
726 } else
727 devc->trigger_fired = TRUE;
728
729 timeout = get_timeout(devc);
730 num_transfers = get_number_of_transfers(devc);
731 size = get_buffer_size(devc);
732 convsize = (size / devc->num_channels + 2) * 16;
733 devc->submitted_transfers = 0;
734
735 devc->convbuffer_size = convsize;
736 if (!(devc->convbuffer = g_try_malloc(convsize))) {
737 sr_err("Conversion buffer malloc failed.");
738 return SR_ERR_MALLOC;
739 }
740
741 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
742 if (!devc->transfers) {
743 sr_err("USB transfers malloc failed.");
744 g_free(devc->convbuffer);
745 return SR_ERR_MALLOC;
746 }
747
748 if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
749 devc->cur_channels)) != SR_OK) {
750 g_free(devc->transfers);
751 g_free(devc->convbuffer);
752 return ret;
753 }
754
755 devc->num_transfers = num_transfers;
756 for (i = 0; i < num_transfers; i++) {
757 if (!(buf = g_try_malloc(size))) {
758 sr_err("USB transfer buffer malloc failed.");
759 if (devc->submitted_transfers)
760 abort_acquisition(devc);
761 else {
762 g_free(devc->transfers);
763 g_free(devc->convbuffer);
764 }
765 return SR_ERR_MALLOC;
766 }
767 transfer = libusb_alloc_transfer(0);
768 libusb_fill_bulk_transfer(transfer, usb->devhdl,
769 2 | LIBUSB_ENDPOINT_IN, buf, size,
770 logic16_receive_transfer, (void *)sdi, timeout);
771 if ((ret = libusb_submit_transfer(transfer)) != 0) {
772 sr_err("Failed to submit transfer: %s.",
773 libusb_error_name(ret));
774 libusb_free_transfer(transfer);
775 g_free(buf);
776 abort_acquisition(devc);
777 return SR_ERR;
778 }
779 devc->transfers[i] = transfer;
780 devc->submitted_transfers++;
781 }
782
783 devc->ctx = drvc->sr_ctx;
784
785 usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
786
787 /* Send header packet to the session bus. */
788 std_session_send_df_header(cb_data, LOG_PREFIX);
789
790 if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
791 abort_acquisition(devc);
792 return ret;
793 }
794
795 return SR_OK;
796}
797
798static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
799{
800 int ret;
801
802 (void)cb_data;
803
804 if (sdi->status != SR_ST_ACTIVE)
805 return SR_ERR_DEV_CLOSED;
806
807 ret = logic16_abort_acquisition(sdi);
808
809 abort_acquisition(sdi->priv);
810
811 return ret;
812}
813
814SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
815 .name = "saleae-logic16",
816 .longname = "Saleae Logic16",
817 .api_version = 1,
818 .init = init,
819 .cleanup = cleanup,
820 .scan = scan,
821 .dev_list = dev_list,
822 .dev_clear = NULL,
823 .config_get = config_get,
824 .config_set = config_set,
825 .config_list = config_list,
826 .dev_open = dev_open,
827 .dev_close = dev_close,
828 .dev_acquisition_start = dev_acquisition_start,
829 .dev_acquisition_stop = dev_acquisition_stop,
830 .priv = NULL,
831};
Hardware access and backend lib