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kingst-la2016: Use ARRAY_SIZE.
[libsigrok.git] / src / hardware / kingst-la2016 / api.c
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f2cd2deb
FS		 1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
5 * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
6 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
7 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23/* mostly stolen from src/hardware/saleae-logic16/ */
24
25#include <config.h>
26#include <glib.h>
27#include <libusb.h>
28#include <stdlib.h>
29#include <string.h>
30#include <math.h>
31#include <libsigrok/libsigrok.h>
32#include "libsigrok-internal.h"
33#include "protocol.h"
34
35static const uint32_t scanopts[] = {
36 SR_CONF_CONN,
37};
38
39static const uint32_t drvopts[] = {
40 SR_CONF_LOGIC_ANALYZER,
41};
42
43static const uint32_t devopts[] = {
44 /* TODO: SR_CONF_CONTINUOUS, */
45 SR_CONF_CONN | SR_CONF_GET,
46 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
47 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_GET | SR_CONF_LIST,
48 SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
49 SR_CONF_LOGIC_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
50 SR_CONF_LOGIC_THRESHOLD_CUSTOM | SR_CONF_GET | SR_CONF_SET,
51 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
52 SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
53};
54
55static const int32_t trigger_matches[] = {
56 SR_TRIGGER_ZERO,
57 SR_TRIGGER_ONE,
58 SR_TRIGGER_RISING,
59 SR_TRIGGER_FALLING,
60};
61
62static const char *channel_names[] = {
63 "0", "1", "2", "3", "4", "5", "6", "7", "8",
64 "9", "10", "11", "12", "13", "14", "15",
65};
66
67static const uint64_t samplerates[] = {
68 SR_KHZ(20),
69 SR_KHZ(50),
70 SR_KHZ(100),
71 SR_KHZ(200),
72 SR_KHZ(500),
73 SR_MHZ(1),
74 SR_MHZ(2),
75 SR_MHZ(4),
76 SR_MHZ(5),
77 SR_MHZ(8),
78 SR_MHZ(10),
79 SR_MHZ(20),
80 SR_MHZ(50),
81 SR_MHZ(100),
82 SR_MHZ(200),
83};
84
85static const float logic_threshold_value[] = {
86 1.58,
87 2.5,
88 1.165,
89 1.5,
90 1.25,
91 0.9,
92 0.75,
93 0.60,
94 0.45,
95};
96
97static const char *logic_threshold[] = {
98 "TTL 5V",
99 "CMOS 5V",
100 "CMOS 3.3V",
101 "CMOS 3.0V",
102 "CMOS 2.5V",
103 "CMOS 1.8V",
104 "CMOS 1.5V",
105 "CMOS 1.2V",
106 "CMOS 0.9V",
107 "USER",
108};
109
110#define MAX_NUM_LOGIC_THRESHOLD_ENTRIES ARRAY_SIZE(logic_threshold)
111
f2cd2deb
FS		 112static GSList *scan(struct sr_dev_driver *di, GSList *options)
113{
114 struct drv_context *drvc;
115 struct dev_context *devc;
116 struct sr_dev_inst *sdi;
117 struct sr_usb_dev_inst *usb;
118 struct sr_config *src;
119 GSList *l;
120 GSList *devices;
121 GSList *conn_devices;
122 struct libusb_device_descriptor des;
123 libusb_device **devlist;
124 unsigned int i, j;
125 const char *conn;
126 char connection_id[64];
127 int64_t fw_updated;
128 unsigned int dev_addr;
129
130 drvc = di->context;
131
132 conn = NULL;
133 for (l = options; l; l = l->next) {
134 src = l->data;
135 switch (src->key) {
136 case SR_CONF_CONN:
137 conn = g_variant_get_string(src->data, NULL);
138 break;
139 }
140 }
141 if (conn)
142 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
143 else
144 conn_devices = NULL;
145
146 /* Find all LA2016 devices and upload firmware to them. */
147 devices = NULL;
148 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
149 for (i = 0; devlist[i]; i++) {
150 if (conn) {
151 usb = NULL;
152 for (l = conn_devices; l; l = l->next) {
153 usb = l->data;
154 if (usb->bus == libusb_get_bus_number(devlist[i])
155 && usb->address == libusb_get_device_address(devlist[i]))
156 break;
157 }
158 if (!l)
159 /* This device matched none of the ones that
160 * matched the conn specification. */
161 continue;
162 }
163
164 libusb_get_device_descriptor(devlist[i], &des);
165
166 if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
167 continue;
168
169 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
170 continue;
171
172 /* Already has the firmware */
173 sr_dbg("Found a LA2016 device.");
174 sdi = g_malloc0(sizeof(struct sr_dev_inst));
175 sdi->status = SR_ST_INITIALIZING;
176 sdi->connection_id = g_strdup(connection_id);
177
178 fw_updated = 0;
179 dev_addr = libusb_get_device_address(devlist[i]);
180 if (des.iProduct != 2) {
181 sr_info("device at '%s' has no firmware loaded!", connection_id);
182
183 if (la2016_upload_firmware(drvc->sr_ctx, devlist[i], des.idProduct) != SR_OK) {
184 sr_err("uC firmware upload failed!");
185 g_free(sdi->connection_id);
186 g_free(sdi);
187 continue;
188 }
189 fw_updated = g_get_monotonic_time();
190 dev_addr = 0xff; /* to mark that we don't know address yet... ugly */
191 }
192
193 sdi->vendor = g_strdup("Kingst");
194 sdi->model = g_strdup("LA2016");
195
196 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
197 sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE, channel_names[j]);
198
199 devices = g_slist_append(devices, sdi);
200
201 devc = g_malloc0(sizeof(struct dev_context));
202 sdi->priv = devc;
203 devc->fw_updated = fw_updated;
204 devc->threshold_voltage_idx = 0;
205 devc->threshold_voltage = logic_threshold_value[devc->threshold_voltage_idx];
206
207 sdi->status = SR_ST_INACTIVE;
208 sdi->inst_type = SR_INST_USB;
209
210 sdi->conn = sr_usb_dev_inst_new(
211 libusb_get_bus_number(devlist[i]),
212 dev_addr, NULL);
213 }
214 libusb_free_device_list(devlist, 1);
215 g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
216
217 return std_scan_complete(di, devices);
218}
219
220static int la2016_dev_open(struct sr_dev_inst *sdi)
221{
222 struct sr_dev_driver *di;
223 libusb_device **devlist;
224 struct sr_usb_dev_inst *usb;
225 struct libusb_device_descriptor des;
226 struct drv_context *drvc;
227 int ret, i, device_count;
228 char connection_id[64];
229
230 di = sdi->driver;
231 drvc = di->context;
232 usb = sdi->conn;
233 ret = SR_ERR;
234
235 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
236 if (device_count < 0) {
237 sr_err("Failed to get device list: %s.", libusb_error_name(device_count));
238 return SR_ERR;
239 }
240
241 for (i = 0; i < device_count; i++) {
242 libusb_get_device_descriptor(devlist[i], &des);
243
244 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID || des.iProduct != 2)
245 continue;
246
247 if ((sdi->status == SR_ST_INITIALIZING) || (sdi->status == SR_ST_INACTIVE)) {
248 /*
249 * Check device by its physical USB bus/port address.
250 */
251 if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
252 continue;
253
254 if (strcmp(sdi->connection_id, connection_id))
255 /* This is not the one. */
256 continue;
257 }
258
259 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
260 if (usb->address == 0xff)
261 /*
262 * First time we touch this device after FW
263 * upload, so we don't know the address yet.
264 */
265 usb->address = libusb_get_device_address(devlist[i]);
266 } else {
267 sr_err("Failed to open device: %s.", libusb_error_name(ret));
268 ret = SR_ERR;
269 break;
270 }
271
272 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
273 if (ret == LIBUSB_ERROR_BUSY) {
274 sr_err("Unable to claim USB interface. Another "
275 "program or driver has already claimed it.");
276 ret = SR_ERR;
277 break;
278 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
279 sr_err("Device has been disconnected.");
280 ret = SR_ERR;
281 break;
282 } else if (ret != 0) {
283 sr_err("Unable to claim interface: %s.", libusb_error_name(ret));
284 ret = SR_ERR;
285 break;
286 }
287
288 if ((ret = la2016_init_device(sdi)) != SR_OK) {
289 sr_err("Failed to init device.");
290 break;
291 }
292
293 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
294 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
295
296 ret = SR_OK;
297
298 break;
299 }
300
301 libusb_free_device_list(devlist, 1);
302
303 if (ret != SR_OK) {
304 if (usb->devhdl) {
305 libusb_release_interface(usb->devhdl, USB_INTERFACE);
306 libusb_close(usb->devhdl);
307 usb->devhdl = NULL;
308 }
309 return SR_ERR;
310 }
311
312 return SR_OK;
313}
314
315static int dev_open(struct sr_dev_inst *sdi)
316{
317 struct dev_context *devc;
318 int64_t timediff_us, timediff_ms;
319 uint64_t reset_done;
320 uint64_t now;
321 int ret;
322
323 devc = sdi->priv;
324
325 /*
326 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
327 * milliseconds for the FX2 to renumerate.
328 */
329 ret = SR_ERR;
330 if (devc->fw_updated > 0) {
331 sr_info("Waiting for device to reset after firmware upload.");
332 /* Takes >= 2000ms for the uC to be gone from the USB bus. */
333 reset_done = devc->fw_updated + 18 * (uint64_t)1e5; /* 1.8 seconds */
334 now = g_get_monotonic_time();
335 if (reset_done > now)
336 g_usleep(reset_done - now);
337 timediff_ms = 0;
338 while (timediff_ms < MAX_RENUM_DELAY_MS) {
339 g_usleep(200 * 1000);
340
341 timediff_us = g_get_monotonic_time() - devc->fw_updated;
342 timediff_ms = timediff_us / 1000;
343
344 if ((ret = la2016_dev_open(sdi)) == SR_OK)
345 break;
346 sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
347 }
348 if (ret != SR_OK) {
349 sr_err("Device failed to re-enumerate.");
350 return SR_ERR;
351 }
352 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
353 } else
354 ret = la2016_dev_open(sdi);
355
356 if (ret != SR_OK) {
357 sr_err("Unable to open device.");
358 return SR_ERR;
359 }
360
361 return SR_OK;
362}
363
364static int dev_close(struct sr_dev_inst *sdi)
365{
366 struct sr_usb_dev_inst *usb;
367
368 usb = sdi->conn;
369
370 if (!usb->devhdl)
371 return SR_ERR_BUG;
372
373 la2016_deinit_device(sdi);
374
375 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
376 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
377 libusb_release_interface(usb->devhdl, USB_INTERFACE);
378 libusb_close(usb->devhdl);
379 usb->devhdl = NULL;
380
381 return SR_OK;
382}
383
384static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
385{
386 struct dev_context *devc;
387 struct sr_usb_dev_inst *usb;
388 double rounded;
389
390 (void)cg;
391
392 if (!sdi)
393 return SR_ERR_ARG;
394 devc = sdi->priv;
395
396 switch (key) {
397 case SR_CONF_CONN:
398 if (!sdi->conn)
399 return SR_ERR_ARG;
400 usb = sdi->conn;
401 if (usb->address == 255)
402 /* Device still needs to re-enumerate after firmware
403 * upload, so we don't know its (future) address. */
404 return SR_ERR;
405 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
406 break;
407 case SR_CONF_SAMPLERATE:
408 *data = g_variant_new_uint64(devc->cur_samplerate);
409 break;
410 case SR_CONF_LIMIT_SAMPLES:
411 *data = g_variant_new_uint64(devc->limit_samples);
412 break;
413 case SR_CONF_CAPTURE_RATIO:
414 *data = g_variant_new_uint64(devc->capture_ratio);
415 break;
416 case SR_CONF_VOLTAGE_THRESHOLD:
417 rounded = (int)(devc->threshold_voltage / 0.1) * 0.1;
418 *data = std_gvar_tuple_double(rounded, rounded + 0.1);
419 return SR_OK;
420 case SR_CONF_LOGIC_THRESHOLD:
421 *data = g_variant_new_string(logic_threshold[devc->threshold_voltage_idx]);
422 break;
423 case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
424 *data = g_variant_new_double(devc->threshold_voltage);
425 break;
426
427 default:
428 return SR_ERR_NA;
429 }
430
431 return SR_OK;
432}
433
434static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
435{
436 struct dev_context *devc;
437 double low, high;
438 int idx;
439
440 (void)cg;
441
442 devc = sdi->priv;
443
444 switch (key) {
445 case SR_CONF_SAMPLERATE:
446 devc->cur_samplerate = g_variant_get_uint64(data);
447 break;
448 case SR_CONF_LIMIT_SAMPLES:
449 devc->limit_samples = g_variant_get_uint64(data);
450 break;
451 case SR_CONF_CAPTURE_RATIO:
452 devc->capture_ratio = g_variant_get_uint64(data);
453 break;
454 case SR_CONF_VOLTAGE_THRESHOLD:
455 g_variant_get(data, "(dd)", &low, &high);
456 devc->threshold_voltage = (low + high) / 2.0;
457 devc->threshold_voltage_idx = MAX_NUM_LOGIC_THRESHOLD_ENTRIES - 1; /* USER */
458 break;
459 case SR_CONF_LOGIC_THRESHOLD: {
460 if ((idx = std_str_idx(data, logic_threshold, MAX_NUM_LOGIC_THRESHOLD_ENTRIES)) < 0)
461 return SR_ERR_ARG;
462 if (idx == MAX_NUM_LOGIC_THRESHOLD_ENTRIES - 1) {
463 /* user threshold */
464 } else {
465 devc->threshold_voltage = logic_threshold_value[idx];
466 }
467 devc->threshold_voltage_idx = idx;
468 break;
469 }
470 case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
471 devc->threshold_voltage = g_variant_get_double(data);
472 break;
473 default:
474 return SR_ERR_NA;
475 }
476
477 return SR_OK;
478}
479
480static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
481{
482 switch (key) {
483 case SR_CONF_SCAN_OPTIONS:
484 case SR_CONF_DEVICE_OPTIONS:
485 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
486 case SR_CONF_SAMPLERATE:
487 *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates));
488 break;
489 case SR_CONF_LIMIT_SAMPLES:
490 *data = std_gvar_tuple_u64(LA2016_NUM_SAMPLES_MIN, LA2016_NUM_SAMPLES_MAX);
491 break;
492 case SR_CONF_VOLTAGE_THRESHOLD:
493 *data = std_gvar_min_max_step_thresholds(
494 LA2016_THR_VOLTAGE_MIN,
495 LA2016_THR_VOLTAGE_MAX, 0.1);
496 break;
497 case SR_CONF_TRIGGER_MATCH:
498 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
499 break;
500 case SR_CONF_LOGIC_THRESHOLD:
501 *data = g_variant_new_strv(logic_threshold, MAX_NUM_LOGIC_THRESHOLD_ENTRIES);
502 break;
503 default:
504 return SR_ERR_NA;
505 }
506
507 return SR_OK;
508}
509
510static void send_chunk(struct sr_dev_inst *sdi, transfer_packet_t *packets, unsigned int num_tfers)
511{
512 struct dev_context *devc;
513 struct sr_datafeed_logic logic;
514 struct sr_datafeed_packet sr_packet;
515 transfer_packet_t *packet;
516 acq_packet_t *p;
517 unsigned int max_samples, n_samples, total_samples, free_n_samples, ptotal;
518 unsigned int i, j, k;
519 int do_signal_trigger;
520 uint16_t *wp;
521
522 devc = sdi->priv;
523
524 logic.unitsize = 2;
525 logic.data = devc->convbuffer;
526
527 sr_packet.type = SR_DF_LOGIC;
528 sr_packet.payload = &logic;
529
530 max_samples = devc->convbuffer_size / 2;
531 n_samples = 0;
532 wp = (uint16_t*)devc->convbuffer;
533 total_samples = 0;
534 do_signal_trigger = 0;
535
536 if (devc->had_triggers_configured && devc->reading_behind_trigger == 0 && devc->info.n_rep_packets_before_trigger == 0) {
537 sr_packet.type = SR_DF_TRIGGER;
538 sr_packet.payload = NULL;
539 sr_session_send(sdi, &sr_packet);
540 devc->reading_behind_trigger = 1;
541
542 do_signal_trigger = 0;
543 sr_packet.type = SR_DF_LOGIC;
544 sr_packet.payload = &logic;
545 }
546
547 for (i = 0; i < num_tfers; i++) {
548 transfer_packet_host(packets[i]);
549 packet = packets + i;
550 ptotal = 0;
b2b6dd55 551 for (k = 0; k < ARRAY_SIZE(packet->packet); k++) {
f2cd2deb
FS		 552 free_n_samples = max_samples - n_samples;
553 if (free_n_samples < 256 || do_signal_trigger) {
554 logic.length = n_samples * 2;
555 sr_session_send(sdi, &sr_packet);
556 n_samples = 0;
557 wp = (uint16_t*)devc->convbuffer;
558 if (do_signal_trigger) {
559 sr_packet.type = SR_DF_TRIGGER;
560 sr_packet.payload = NULL;
561 sr_session_send(sdi, &sr_packet);
562
563 do_signal_trigger = 0;
564 sr_packet.type = SR_DF_LOGIC;
565 sr_packet.payload = &logic;
566 }
567 }
568 p = packet->packet + k;
569 for (j = 0; j < p->repetitions; j++)
570 *(wp++) = p->state;
571 n_samples += p->repetitions;
572 total_samples += p->repetitions;
573 ptotal += p->repetitions;
574 devc->total_samples += p->repetitions;
575 if (!devc->reading_behind_trigger) {
576 devc->n_reps_until_trigger --;
577 if (devc->n_reps_until_trigger == 0) {
578 devc->reading_behind_trigger = 1;
579 do_signal_trigger = 1;
580 sr_dbg(" here is trigger position after %" PRIu64 " samples, %.6fms",
581 devc->total_samples,
582 (double)devc->total_samples / devc->cur_samplerate * 1e3);
583 }
584 }
585 }
586 }
587 if (n_samples) {
588 logic.length = n_samples * 2;
589 sr_session_send(sdi, &sr_packet);
590 if (do_signal_trigger) {
591 sr_packet.type = SR_DF_TRIGGER;
592 sr_packet.payload = NULL;
593 sr_session_send(sdi, &sr_packet);
594 }
595 }
596 sr_dbg("send_chunk done after %d samples", total_samples);
597}
598
599static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
600{
601 struct sr_dev_inst *sdi;
602 struct dev_context *devc;
603 struct sr_usb_dev_inst *usb;
604 int ret;
605
606 sdi = transfer->user_data;
607 devc = sdi->priv;
608 usb = sdi->conn;
609
610 sr_dbg("receive_transfer(): status %s received %d bytes.",
611 libusb_error_name(transfer->status), transfer->actual_length);
612
613 if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
614 sr_err("bulk transfer timeout!");
615 devc->transfer_finished = 1;
616 }
617 send_chunk(sdi, (transfer_packet_t*)transfer->buffer, transfer->actual_length / sizeof(transfer_packet_t));
618
619 devc->n_bytes_to_read -= transfer->actual_length;
620 if (devc->n_bytes_to_read) {
621 uint32_t to_read = devc->n_bytes_to_read;
622 if (to_read > LA2016_BULK_MAX)
623 to_read = LA2016_BULK_MAX;
624 libusb_fill_bulk_transfer(
625 transfer, usb->devhdl,
626 0x86, transfer->buffer, to_read,
627 receive_transfer, (void*)sdi, DEFAULT_TIMEOUT_MS);
628
629 if ((ret = libusb_submit_transfer(transfer)) == 0)
630 return;
631 sr_err("Failed to submit further transfer: %s.", libusb_error_name(ret));
632 }
633
634 g_free(transfer->buffer);
635 libusb_free_transfer(transfer);
636 devc->transfer_finished = 1;
637}
638
639static int handle_event(int fd, int revents, void *cb_data)
640{
641 const struct sr_dev_inst *sdi;
642 struct dev_context *devc;
643 struct drv_context *drvc;
644 struct sr_datafeed_packet packet;
645 struct timeval tv;
646
647 (void)fd;
648 (void)revents;
649
650 sdi = cb_data;
651 devc = sdi->priv;
652 drvc = sdi->driver->context;
653
654 if (devc->have_trigger == 0) {
655 if (la2016_has_triggered(sdi) == 0) {
656 sr_dbg("not yet ready for download...");
657 return TRUE;
658 }
659 devc->have_trigger = 1;
660 devc->transfer_finished = 0;
661 devc->reading_behind_trigger = 0;
662 devc->total_samples = 0;
663 /* we can start retrieving data! */
664 if (la2016_start_retrieval(sdi, receive_transfer) != SR_OK) {
665 sr_err("failed to start retrieval!");
666 return FALSE;
667 }
668 sr_dbg("retrieval is started...");
669 packet.type = SR_DF_FRAME_BEGIN;
670 sr_session_send(sdi, &packet);
671
672 return TRUE;
673 }
674
675 tv.tv_sec = tv.tv_usec = 0;
676 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
677
678 if (devc->transfer_finished) {
679 sr_dbg("transfer is finished!");
680 packet.type = SR_DF_FRAME_END;
681 sr_session_send(sdi, &packet);
682
683 usb_source_remove(sdi->session, drvc->sr_ctx);
684 std_session_send_df_end(sdi);
685
686 la2016_stop_acquisition(sdi);
687
688 g_free(devc->convbuffer);
689 devc->convbuffer = NULL;
690
691 sr_dbg("transfer is now finished");
692 }
693
694 return TRUE;
695}
696
697static void abort_acquisition(struct dev_context *devc)
698{
699 if (devc->transfer)
700 libusb_cancel_transfer(devc->transfer);
701}
702
703static int configure_channels(const struct sr_dev_inst *sdi)
704{
705 struct dev_context *devc;
706
707 devc = sdi->priv;
708 devc->cur_channels = 0;
709 devc->num_channels = 0;
710
711 for (GSList *l = sdi->channels; l; l = l->next) {
712 struct sr_channel *ch = (struct sr_channel*)l->data;
713 if (ch->enabled == FALSE)
714 continue;
715 devc->cur_channels |= 1 << (ch->index);
716 devc->num_channels++;
717 }
718
719 return SR_OK;
720}
721
722static int dev_acquisition_start(const struct sr_dev_inst *sdi)
723{
724 struct sr_dev_driver *di;
725 struct drv_context *drvc;
726 struct dev_context *devc;
727 int ret;
728
729 di = sdi->driver;
730 drvc = di->context;
731 devc = sdi->priv;
732
733 if (configure_channels(sdi) != SR_OK) {
734 sr_err("Failed to configure channels.");
735 return SR_ERR;
736 }
737
738 devc->convbuffer_size = 4 * 1024 * 1024;
739 if (!(devc->convbuffer = g_try_malloc(devc->convbuffer_size))) {
740 sr_err("Conversion buffer malloc failed.");
741 return SR_ERR_MALLOC;
742 }
743
744 if ((ret = la2016_setup_acquisition(sdi)) != SR_OK) {
745 g_free(devc->convbuffer);
746 devc->convbuffer = NULL;
747 return ret;
748 }
749
750 devc->ctx = drvc->sr_ctx;
751
752 if ((ret = la2016_start_acquisition(sdi)) != SR_OK) {
753 abort_acquisition(devc);
754 return ret;
755 }
756
757 devc->have_trigger = 0;
758 usb_source_add(sdi->session, drvc->sr_ctx, 50, handle_event, (void*)sdi);
759
760 std_session_send_df_header(sdi);
761
762 return SR_OK;
763}
764
765static int dev_acquisition_stop(struct sr_dev_inst *sdi)
766{
767 int ret;
768
769 ret = la2016_abort_acquisition(sdi);
770 abort_acquisition(sdi->priv);
771
772 return ret;
773}
774
775static struct sr_dev_driver kingst_la2016_driver_info = {
776 .name = "kingst-la2016",
777 .longname = "Kingst LA2016",
778 .api_version = 1,
779 .init = std_init,
780 .cleanup = std_cleanup,
781 .scan = scan,
782 .dev_list = std_dev_list,
783 .dev_clear = std_dev_clear,
784 .config_get = config_get,
785 .config_set = config_set,
786 .config_list = config_list,
787 .dev_open = dev_open,
788 .dev_close = dev_close,
789 .dev_acquisition_start = dev_acquisition_start,
790 .dev_acquisition_stop = dev_acquisition_stop,
791 .context = NULL,
792};
793SR_REGISTER_DEV_DRIVER(kingst_la2016_driver_info);
Hardware access and backend lib