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fx2lafw: Add SR_CONF_CAPTURE_RATIO support.
[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 <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 = g_malloc0(sizeof(struct sr_dev_inst));
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 ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
210 channel_names[j]);
211 sdi->channels = g_slist_append(sdi->channels, ch);
212 }
213
214 devc = g_malloc0(sizeof(struct dev_context));
215 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
216 sdi->priv = devc;
217 drvc->instances = g_slist_append(drvc->instances, sdi);
218 devices = g_slist_append(devices, sdi);
219
220 if (check_conf_profile(devlist[i])) {
221 /* Already has the firmware, so fix the new address. */
222 sr_dbg("Found a Logic16 device.");
223 sdi->status = SR_ST_INACTIVE;
224 sdi->inst_type = SR_INST_USB;
225 sdi->conn = sr_usb_dev_inst_new(
226 libusb_get_bus_number(devlist[i]),
227 libusb_get_device_address(devlist[i]), NULL);
228 } else {
229 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
230 FX2_FIRMWARE) == SR_OK)
231 /* Store when this device's FW was updated. */
232 devc->fw_updated = g_get_monotonic_time();
233 else
234 sr_err("Firmware upload failed.");
235 sdi->inst_type = SR_INST_USB;
236 sdi->conn = sr_usb_dev_inst_new(
237 libusb_get_bus_number(devlist[i]), 0xff, NULL);
238 }
239 }
240 libusb_free_device_list(devlist, 1);
241 g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
242
243 return devices;
244}
245
246static GSList *dev_list(void)
247{
248 return ((struct drv_context *)(di->priv))->instances;
249}
250
251static int logic16_dev_open(struct sr_dev_inst *sdi)
252{
253 libusb_device **devlist;
254 struct sr_usb_dev_inst *usb;
255 struct libusb_device_descriptor des;
256 struct drv_context *drvc;
257 int ret, i, device_count;
258 char connection_id[64];
259
260 drvc = di->priv;
261 usb = sdi->conn;
262
263 if (sdi->status == SR_ST_ACTIVE)
264 /* Device is already in use. */
265 return SR_ERR;
266
267 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
268 if (device_count < 0) {
269 sr_err("Failed to get device list: %s.",
270 libusb_error_name(device_count));
271 return SR_ERR;
272 }
273
274 for (i = 0; i < device_count; i++) {
275 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
276 sr_err("Failed to get device descriptor: %s.",
277 libusb_error_name(ret));
278 continue;
279 }
280
281 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
282 continue;
283
284 if ((sdi->status == SR_ST_INITIALIZING) ||
285 (sdi->status == SR_ST_INACTIVE)) {
286 /*
287 * Check device by its physical USB bus/port address.
288 */
289 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
290 if (strcmp(sdi->connection_id, connection_id))
291 /* This is not the one. */
292 continue;
293 }
294
295 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
296 if (usb->address == 0xff)
297 /*
298 * First time we touch this device after FW
299 * upload, so we don't know the address yet.
300 */
301 usb->address = libusb_get_device_address(devlist[i]);
302 } else {
303 sr_err("Failed to open device: %s.",
304 libusb_error_name(ret));
305 break;
306 }
307
308 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
309 if (ret == LIBUSB_ERROR_BUSY) {
310 sr_err("Unable to claim USB interface. Another "
311 "program or driver has already claimed it.");
312 break;
313 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
314 sr_err("Device has been disconnected.");
315 break;
316 } else if (ret != 0) {
317 sr_err("Unable to claim interface: %s.",
318 libusb_error_name(ret));
319 break;
320 }
321
322 if ((ret = logic16_init_device(sdi)) != SR_OK) {
323 sr_err("Failed to init device.");
324 break;
325 }
326
327 sdi->status = SR_ST_ACTIVE;
328 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
329 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
330
331 break;
332 }
333 libusb_free_device_list(devlist, 1);
334
335 if (sdi->status != SR_ST_ACTIVE) {
336 if (usb->devhdl) {
337 libusb_release_interface(usb->devhdl, USB_INTERFACE);
338 libusb_close(usb->devhdl);
339 usb->devhdl = NULL;
340 }
341 return SR_ERR;
342 }
343
344 return SR_OK;
345}
346
347static int dev_open(struct sr_dev_inst *sdi)
348{
349 struct dev_context *devc;
350 int ret;
351 int64_t timediff_us, timediff_ms;
352
353 devc = sdi->priv;
354
355 /*
356 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
357 * milliseconds for the FX2 to renumerate.
358 */
359 ret = SR_ERR;
360 if (devc->fw_updated > 0) {
361 sr_info("Waiting for device to reset.");
362 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
363 g_usleep(300 * 1000);
364 timediff_ms = 0;
365 while (timediff_ms < MAX_RENUM_DELAY_MS) {
366 if ((ret = logic16_dev_open(sdi)) == SR_OK)
367 break;
368 g_usleep(100 * 1000);
369
370 timediff_us = g_get_monotonic_time() - devc->fw_updated;
371 timediff_ms = timediff_us / 1000;
372 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
373 }
374 if (ret != SR_OK) {
375 sr_err("Device failed to renumerate.");
376 return SR_ERR;
377 }
378 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
379 } else {
380 sr_info("Firmware upload was not needed.");
381 ret = logic16_dev_open(sdi);
382 }
383
384 if (ret != SR_OK) {
385 sr_err("Unable to open device.");
386 return SR_ERR;
387 }
388
389 if (devc->cur_samplerate == 0) {
390 /* Samplerate hasn't been set; default to the slowest one. */
391 devc->cur_samplerate = samplerates[0];
392 }
393
394 return SR_OK;
395}
396
397static int dev_close(struct sr_dev_inst *sdi)
398{
399 struct sr_usb_dev_inst *usb;
400
401 usb = sdi->conn;
402 if (usb->devhdl == NULL)
403 return SR_ERR;
404
405 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
406 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
407 libusb_release_interface(usb->devhdl, USB_INTERFACE);
408 libusb_close(usb->devhdl);
409 usb->devhdl = NULL;
410 sdi->status = SR_ST_INACTIVE;
411
412 return SR_OK;
413}
414
415static int cleanup(void)
416{
417 int ret;
418 struct drv_context *drvc;
419
420 if (!(drvc = di->priv))
421 /* Can get called on an unused driver, doesn't matter. */
422 return SR_OK;
423
424 ret = std_dev_clear(di, NULL);
425 g_free(drvc);
426 di->priv = NULL;
427
428 return ret;
429}
430
431static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
432 const struct sr_channel_group *cg)
433{
434 struct dev_context *devc;
435 struct sr_usb_dev_inst *usb;
436 GVariant *range[2];
437 char str[128];
438 int ret;
439 unsigned int i;
440
441 (void)cg;
442
443 ret = SR_OK;
444 switch (key) {
445 case SR_CONF_CONN:
446 if (!sdi || !sdi->conn)
447 return SR_ERR_ARG;
448 usb = sdi->conn;
449 if (usb->address == 255)
450 /* Device still needs to re-enumerate after firmware
451 * upload, so we don't know its (future) address. */
452 return SR_ERR;
453 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
454 *data = g_variant_new_string(str);
455 break;
456 case SR_CONF_SAMPLERATE:
457 if (!sdi)
458 return SR_ERR;
459 devc = sdi->priv;
460 *data = g_variant_new_uint64(devc->cur_samplerate);
461 break;
462 case SR_CONF_VOLTAGE_THRESHOLD:
463 if (!sdi)
464 return SR_ERR;
465 devc = sdi->priv;
466 ret = SR_ERR;
467 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
468 if (devc->selected_voltage_range !=
469 volt_thresholds[i].range)
470 continue;
471 range[0] = g_variant_new_double(volt_thresholds[i].low);
472 range[1] = g_variant_new_double(volt_thresholds[i].high);
473 *data = g_variant_new_tuple(range, 2);
474 ret = SR_OK;
475 break;
476 }
477 break;
478 default:
479 return SR_ERR_NA;
480 }
481
482 return ret;
483}
484
485static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
486 const struct sr_channel_group *cg)
487{
488 struct dev_context *devc;
489 gdouble low, high;
490 int ret;
491 unsigned int i;
492
493 (void)cg;
494
495 if (sdi->status != SR_ST_ACTIVE)
496 return SR_ERR_DEV_CLOSED;
497
498 devc = sdi->priv;
499
500 ret = SR_OK;
501 switch (key) {
502 case SR_CONF_SAMPLERATE:
503 devc->cur_samplerate = g_variant_get_uint64(data);
504 break;
505 case SR_CONF_LIMIT_SAMPLES:
506 devc->limit_samples = g_variant_get_uint64(data);
507 break;
508 case SR_CONF_VOLTAGE_THRESHOLD:
509 g_variant_get(data, "(dd)", &low, &high);
510 ret = SR_ERR_ARG;
511 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
512 if (fabs(volt_thresholds[i].low - low) < 0.1 &&
513 fabs(volt_thresholds[i].high - high) < 0.1) {
514 devc->selected_voltage_range =
515 volt_thresholds[i].range;
516 ret = SR_OK;
517 break;
518 }
519 }
520 break;
521 default:
522 ret = SR_ERR_NA;
523 }
524
525 return ret;
526}
527
528static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
529 const struct sr_channel_group *cg)
530{
531 GVariant *gvar, *range[2];
532 GVariantBuilder gvb;
533 int ret;
534 unsigned int i;
535
536 (void)sdi;
537 (void)cg;
538
539 ret = SR_OK;
540 switch (key) {
541 case SR_CONF_SCAN_OPTIONS:
542 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
543 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
544 break;
545 case SR_CONF_DEVICE_OPTIONS:
546 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
547 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
548 break;
549 case SR_CONF_SAMPLERATE:
550 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
551 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
552 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
553 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
554 *data = g_variant_builder_end(&gvb);
555 break;
556 case SR_CONF_VOLTAGE_THRESHOLD:
557 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
558 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
559 range[0] = g_variant_new_double(volt_thresholds[i].low);
560 range[1] = g_variant_new_double(volt_thresholds[i].high);
561 gvar = g_variant_new_tuple(range, 2);
562 g_variant_builder_add_value(&gvb, gvar);
563 }
564 *data = g_variant_builder_end(&gvb);
565 break;
566 case SR_CONF_TRIGGER_MATCH:
567 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
568 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
569 sizeof(int32_t));
570 break;
571 default:
572 return SR_ERR_NA;
573 }
574
575 return ret;
576}
577
578static void abort_acquisition(struct dev_context *devc)
579{
580 int i;
581
582 devc->sent_samples = -1;
583
584 for (i = devc->num_transfers - 1; i >= 0; i--) {
585 if (devc->transfers[i])
586 libusb_cancel_transfer(devc->transfers[i]);
587 }
588}
589
590static unsigned int bytes_per_ms(struct dev_context *devc)
591{
592 return devc->cur_samplerate * devc->num_channels / 8000;
593}
594
595static size_t get_buffer_size(struct dev_context *devc)
596{
597 size_t s;
598
599 /*
600 * The buffer should be large enough to hold 10ms of data and
601 * a multiple of 512.
602 */
603 s = 10 * bytes_per_ms(devc);
604 return (s + 511) & ~511;
605}
606
607static unsigned int get_number_of_transfers(struct dev_context *devc)
608{
609 unsigned int n;
610
611 /* Total buffer size should be able to hold about 500ms of data. */
612 n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
613
614 if (n > NUM_SIMUL_TRANSFERS)
615 return NUM_SIMUL_TRANSFERS;
616
617 return n;
618}
619
620static unsigned int get_timeout(struct dev_context *devc)
621{
622 size_t total_size;
623 unsigned int timeout;
624
625 total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
626 timeout = total_size / bytes_per_ms(devc);
627 return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
628}
629
630static int configure_channels(const struct sr_dev_inst *sdi)
631{
632 struct dev_context *devc;
633 struct sr_channel *ch;
634 GSList *l;
635 uint16_t channel_bit;
636
637 devc = sdi->priv;
638
639 devc->cur_channels = 0;
640 devc->num_channels = 0;
641 for (l = sdi->channels; l; l = l->next) {
642 ch = (struct sr_channel *)l->data;
643 if (ch->enabled == FALSE)
644 continue;
645
646 channel_bit = 1 << (ch->index);
647
648 devc->cur_channels |= channel_bit;
649
650#ifdef WORDS_BIGENDIAN
651 /*
652 * Output logic data should be stored in little endian format.
653 * To speed things up during conversion, do the switcharoo
654 * here instead.
655 */
656 channel_bit = 1 << (ch->index ^ 8);
657#endif
658
659 devc->channel_masks[devc->num_channels++] = channel_bit;
660 }
661
662 return SR_OK;
663}
664
665static int receive_data(int fd, int revents, void *cb_data)
666{
667 struct timeval tv;
668 struct dev_context *devc;
669 struct drv_context *drvc;
670 const struct sr_dev_inst *sdi;
671
672 (void)fd;
673 (void)revents;
674
675 sdi = cb_data;
676 drvc = di->priv;
677 devc = sdi->priv;
678
679 tv.tv_sec = tv.tv_usec = 0;
680 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
681
682 if (devc->sent_samples == -2) {
683 logic16_abort_acquisition(sdi);
684 abort_acquisition(devc);
685 }
686
687 return TRUE;
688}
689
690static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
691{
692 struct dev_context *devc;
693 struct drv_context *drvc;
694 struct sr_usb_dev_inst *usb;
695 struct sr_trigger *trigger;
696 struct libusb_transfer *transfer;
697 unsigned int i, timeout, num_transfers;
698 int ret;
699 unsigned char *buf;
700 size_t size, convsize;
701
702 if (sdi->status != SR_ST_ACTIVE)
703 return SR_ERR_DEV_CLOSED;
704
705 drvc = di->priv;
706 devc = sdi->priv;
707 usb = sdi->conn;
708
709 /* Configures devc->cur_channels. */
710 if (configure_channels(sdi) != SR_OK) {
711 sr_err("Failed to configure channels.");
712 return SR_ERR;
713 }
714
715 devc->cb_data = cb_data;
716 devc->sent_samples = 0;
717 devc->empty_transfer_count = 0;
718 devc->cur_channel = 0;
719 memset(devc->channel_data, 0, sizeof(devc->channel_data));
720
721 if ((trigger = sr_session_trigger_get(sdi->session))) {
722 devc->stl = soft_trigger_logic_new(sdi, trigger, 0);
723 devc->trigger_fired = FALSE;
724 } else
725 devc->trigger_fired = TRUE;
726
727 timeout = get_timeout(devc);
728 num_transfers = get_number_of_transfers(devc);
729 size = get_buffer_size(devc);
730 convsize = (size / devc->num_channels + 2) * 16;
731 devc->submitted_transfers = 0;
732
733 devc->convbuffer_size = convsize;
734 if (!(devc->convbuffer = g_try_malloc(convsize))) {
735 sr_err("Conversion buffer malloc failed.");
736 return SR_ERR_MALLOC;
737 }
738
739 devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
740 if (!devc->transfers) {
741 sr_err("USB transfers malloc failed.");
742 g_free(devc->convbuffer);
743 return SR_ERR_MALLOC;
744 }
745
746 if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
747 devc->cur_channels)) != SR_OK) {
748 g_free(devc->transfers);
749 g_free(devc->convbuffer);
750 return ret;
751 }
752
753 devc->num_transfers = num_transfers;
754 for (i = 0; i < num_transfers; i++) {
755 if (!(buf = g_try_malloc(size))) {
756 sr_err("USB transfer buffer malloc failed.");
757 if (devc->submitted_transfers)
758 abort_acquisition(devc);
759 else {
760 g_free(devc->transfers);
761 g_free(devc->convbuffer);
762 }
763 return SR_ERR_MALLOC;
764 }
765 transfer = libusb_alloc_transfer(0);
766 libusb_fill_bulk_transfer(transfer, usb->devhdl,
767 2 | LIBUSB_ENDPOINT_IN, buf, size,
768 logic16_receive_transfer, (void *)sdi, timeout);
769 if ((ret = libusb_submit_transfer(transfer)) != 0) {
770 sr_err("Failed to submit transfer: %s.",
771 libusb_error_name(ret));
772 libusb_free_transfer(transfer);
773 g_free(buf);
774 abort_acquisition(devc);
775 return SR_ERR;
776 }
777 devc->transfers[i] = transfer;
778 devc->submitted_transfers++;
779 }
780
781 devc->ctx = drvc->sr_ctx;
782
783 usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
784
785 /* Send header packet to the session bus. */
786 std_session_send_df_header(cb_data, LOG_PREFIX);
787
788 if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
789 abort_acquisition(devc);
790 return ret;
791 }
792
793 return SR_OK;
794}
795
796static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
797{
798 int ret;
799
800 (void)cb_data;
801
802 if (sdi->status != SR_ST_ACTIVE)
803 return SR_ERR_DEV_CLOSED;
804
805 ret = logic16_abort_acquisition(sdi);
806
807 abort_acquisition(sdi->priv);
808
809 return ret;
810}
811
812SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
813 .name = "saleae-logic16",
814 .longname = "Saleae Logic16",
815 .api_version = 1,
816 .init = init,
817 .cleanup = cleanup,
818 .scan = scan,
819 .dev_list = dev_list,
820 .dev_clear = NULL,
821 .config_get = config_get,
822 .config_set = config_set,
823 .config_list = config_list,
824 .dev_open = dev_open,
825 .dev_close = dev_close,
826 .dev_acquisition_start = dev_acquisition_start,
827 .dev_acquisition_stop = dev_acquisition_stop,
828 .priv = NULL,
829};
Hardware access and backend lib