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1/*
2 * This file is part of the sigrok project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <stdio.h>
21#include <stdint.h>
22#include <stdlib.h>
23#include <sys/types.h>
24#include <sys/stat.h>
25#include <fcntl.h>
26#include <unistd.h>
27#ifdef _WIN32
28#include <windows.h>
29#else
30#include <termios.h>
31#endif
32#include <string.h>
33#include <sys/time.h>
34#include <inttypes.h>
35#ifdef _WIN32
36/* TODO */
37#else
38#include <arpa/inet.h>
39#endif
40#include <glib.h>
41#include "sigrok.h"
42#include "sigrok-internal.h"
43#include "ols.h"
44
45#ifdef _WIN32
46#define O_NONBLOCK FIONBIO
47#endif
48
49static int capabilities[] = {
50 SR_HWCAP_LOGIC_ANALYZER,
51 SR_HWCAP_SAMPLERATE,
52 SR_HWCAP_CAPTURE_RATIO,
53 SR_HWCAP_LIMIT_SAMPLES,
54 SR_HWCAP_RLE,
55 0,
56};
57
58static const char *probe_names[NUM_PROBES + 1] = {
59 "0",
60 "1",
61 "2",
62 "3",
63 "4",
64 "5",
65 "6",
66 "7",
67 "8",
68 "9",
69 "10",
70 "11",
71 "12",
72 "13",
73 "14",
74 "15",
75 "16",
76 "17",
77 "18",
78 "19",
79 "20",
80 "21",
81 "22",
82 "23",
83 "24",
84 "25",
85 "26",
86 "27",
87 "28",
88 "29",
89 "30",
90 "31",
91 NULL,
92};
93
94/* default supported samplerates, can be overridden by device metadata */
95static struct sr_samplerates samplerates = {
96 SR_HZ(10),
97 SR_MHZ(200),
98 SR_HZ(1),
99 NULL,
100};
101
102/* List of struct sr_serial_device_instance */
103static GSList *device_instances = NULL;
104
105static int send_shortcommand(int fd, uint8_t command)
106{
107 char buf[1];
108
109 sr_dbg("ols: sending cmd 0x%.2x", command);
110 buf[0] = command;
111 if (serial_write(fd, buf, 1) != 1)
112 return SR_ERR;
113
114 return SR_OK;
115}
116
117static int send_longcommand(int fd, uint8_t command, uint32_t data)
118{
119 char buf[5];
120
121 sr_dbg("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
122 buf[0] = command;
123 buf[1] = (data & 0xff000000) >> 24;
124 buf[2] = (data & 0xff0000) >> 16;
125 buf[3] = (data & 0xff00) >> 8;
126 buf[4] = data & 0xff;
127 if (serial_write(fd, buf, 5) != 5)
128 return SR_ERR;
129
130 return SR_OK;
131}
132
133static int configure_probes(struct ols_device *ols, GSList *probes)
134{
135 struct sr_probe *probe;
136 GSList *l;
137 int probe_bit, stage, i;
138 char *tc;
139
140 ols->probe_mask = 0;
141 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
142 ols->trigger_mask[i] = 0;
143 ols->trigger_value[i] = 0;
144 }
145
146 ols->num_stages = 0;
147 for (l = probes; l; l = l->next) {
148 probe = (struct sr_probe *)l->data;
149 if (!probe->enabled)
150 continue;
151
152 /*
153 * Set up the probe mask for later configuration into the
154 * flag register.
155 */
156 probe_bit = 1 << (probe->index - 1);
157 ols->probe_mask |= probe_bit;
158
159 if (!probe->trigger)
160 continue;
161
162 /* Configure trigger mask and value. */
163 stage = 0;
164 for (tc = probe->trigger; tc && *tc; tc++) {
165 ols->trigger_mask[stage] |= probe_bit;
166 if (*tc == '1')
167 ols->trigger_value[stage] |= probe_bit;
168 stage++;
169 if (stage > 3)
170 /*
171 * TODO: Only supporting parallel mode, with
172 * up to 4 stages.
173 */
174 return SR_ERR;
175 }
176 if (stage > ols->num_stages)
177 ols->num_stages = stage;
178 }
179
180 return SR_OK;
181}
182
183static uint32_t reverse16(uint32_t in)
184{
185 uint32_t out;
186
187 out = (in & 0xff) << 8;
188 out |= (in & 0xff00) >> 8;
189 out |= (in & 0xff0000) << 8;
190 out |= (in & 0xff000000) >> 8;
191
192 return out;
193}
194
195static uint32_t reverse32(uint32_t in)
196{
197 uint32_t out;
198
199 out = (in & 0xff) << 24;
200 out |= (in & 0xff00) << 8;
201 out |= (in & 0xff0000) >> 8;
202 out |= (in & 0xff000000) >> 24;
203
204 return out;
205}
206
207static struct ols_device *ols_device_new(void)
208{
209 struct ols_device *ols;
210
211 /* TODO: Is 'ols' ever g_free()'d? */
212 if (!(ols = g_try_malloc0(sizeof(struct ols_device)))) {
213 sr_err("ols: %s: ols malloc failed", __func__);
214 return NULL;
215 }
216
217 ols->trigger_at = -1;
218 ols->probe_mask = 0xffffffff;
219 ols->cur_samplerate = SR_KHZ(200);
220 ols->serial = NULL;
221
222 return ols;
223}
224
225static struct sr_device_instance *get_metadata(int fd)
226{
227 struct sr_device_instance *sdi;
228 struct ols_device *ols;
229 uint32_t tmp_int;
230 uint8_t key, type, token;
231 GString *tmp_str, *devicename, *version;
232 gchar tmp_c;
233
234 sdi = sr_device_instance_new(0, SR_ST_INACTIVE, NULL, NULL, NULL);
235 ols = ols_device_new();
236 sdi->priv = ols;
237
238 devicename = g_string_new("");
239 version = g_string_new("");
240
241 key = 0xff;
242 while (key) {
243 if (serial_read(fd, &key, 1) != 1 || key == 0x00)
244 break;
245 type = key >> 5;
246 token = key & 0x1f;
247 switch (type) {
248 case 0:
249 /* NULL-terminated string */
250 tmp_str = g_string_new("");
251 while (serial_read(fd, &tmp_c, 1) == 1 && tmp_c != '\0')
252 g_string_append_c(tmp_str, tmp_c);
253 sr_dbg("ols: got metadata key 0x%.2x value '%s'",
254 key, tmp_str->str);
255 switch (token) {
256 case 0x01:
257 /* Device name */
258 devicename = g_string_append(devicename, tmp_str->str);
259 break;
260 case 0x02:
261 /* FPGA firmware version */
262 if (version->len)
263 g_string_append(version, ", ");
264 g_string_append(version, "FPGA version ");
265 g_string_append(version, tmp_str->str);
266 break;
267 case 0x03:
268 /* Ancillary version */
269 if (version->len)
270 g_string_append(version, ", ");
271 g_string_append(version, "Ancillary version ");
272 g_string_append(version, tmp_str->str);
273 break;
274 default:
275 sr_info("ols: unknown token 0x%.2x: '%s'",
276 token, tmp_str->str);
277 break;
278 }
279 g_string_free(tmp_str, TRUE);
280 break;
281 case 1:
282 /* 32-bit unsigned integer */
283 if (serial_read(fd, &tmp_int, 4) != 4)
284 break;
285 tmp_int = reverse32(tmp_int);
286 sr_dbg("ols: got metadata key 0x%.2x value 0x%.8x",
287 key, tmp_int);
288 switch (token) {
289 case 0x00:
290 /* Number of usable probes */
291 ols->num_probes = tmp_int;
292 break;
293 case 0x01:
294 /* Amount of sample memory available (bytes) */
295 ols->max_samples = tmp_int;
296 break;
297 case 0x02:
298 /* Amount of dynamic memory available (bytes) */
299 /* what is this for? */
300 break;
301 case 0x03:
302 /* Maximum sample rate (hz) */
303 ols->max_samplerate = tmp_int;
304 break;
305 case 0x04:
306 /* protocol version */
307 ols->protocol_version = tmp_int;
308 break;
309 default:
310 sr_info("ols: unknown token 0x%.2x: 0x%.8x",
311 token, tmp_int);
312 break;
313 }
314 break;
315 case 2:
316 /* 8-bit unsigned integer */
317 if (serial_read(fd, &tmp_c, 1) != 1)
318 break;
319 sr_dbg("ols: got metadata key 0x%.2x value 0x%.2x",
320 key, tmp_c);
321 switch (token) {
322 case 0x00:
323 /* Number of usable probes */
324 ols->num_probes = tmp_c;
325 break;
326 case 0x01:
327 /* protocol version */
328 ols->protocol_version = tmp_c;
329 break;
330 default:
331 sr_info("ols: unknown token 0x%.2x: 0x%.2x",
332 token, tmp_c);
333 break;
334 }
335 break;
336 default:
337 /* unknown type */
338 break;
339 }
340 }
341
342 sdi->model = devicename->str;
343 sdi->version = version->str;
344 g_string_free(devicename, FALSE);
345 g_string_free(version, FALSE);
346
347 return sdi;
348}
349
350static int hw_init(const char *deviceinfo)
351{
352 struct sr_device_instance *sdi;
353 struct ols_device *ols;
354 GSList *ports, *l;
355 GPollFD *fds, probefd;
356 int devcnt, final_devcnt, num_ports, fd, ret, i;
357 char buf[8], **device_names, **serial_params;
358
359 final_devcnt = 0;
360
361 if (deviceinfo)
362 ports = g_slist_append(NULL, g_strdup(deviceinfo));
363 else
364 /* No specific device given, so scan all serial ports. */
365 ports = list_serial_ports();
366
367 num_ports = g_slist_length(ports);
368
369 if (!(fds = g_try_malloc0(num_ports * sizeof(GPollFD)))) {
370 sr_err("ols: %s: fds malloc failed", __func__);
371 goto hw_init_free_ports; /* TODO: SR_ERR_MALLOC. */
372 }
373
374 if (!(device_names = g_try_malloc(num_ports * sizeof(char *)))) {
375 sr_err("ols: %s: device_names malloc failed", __func__);
376 goto hw_init_free_fds; /* TODO: SR_ERR_MALLOC. */
377 }
378
379 if (!(serial_params = g_try_malloc(num_ports * sizeof(char *)))) {
380 sr_err("ols: %s: serial_params malloc failed", __func__);
381 goto hw_init_free_device_names; /* TODO: SR_ERR_MALLOC. */
382 }
383
384 devcnt = 0;
385 for (l = ports; l; l = l->next) {
386 /* The discovery procedure is like this: first send the Reset
387 * command (0x00) 5 times, since the device could be anywhere
388 * in a 5-byte command. Then send the ID command (0x02).
389 * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
390 * have a match.
391 *
392 * Since it may take the device a while to respond at 115Kb/s,
393 * we do all the sending first, then wait for all of them to
394 * respond with g_poll().
395 */
396 sr_info("ols: probing %s...", (char *)l->data);
397 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
398 if (fd != -1) {
399 serial_params[devcnt] = serial_backup_params(fd);
400 serial_set_params(fd, 115200, 8, 0, 1, 2);
401 ret = SR_OK;
402 for (i = 0; i < 5; i++) {
403 if ((ret = send_shortcommand(fd,
404 CMD_RESET)) != SR_OK) {
405 /* Serial port is not writable. */
406 break;
407 }
408 }
409 if (ret != SR_OK) {
410 serial_restore_params(fd,
411 serial_params[devcnt]);
412 serial_close(fd);
413 continue;
414 }
415 send_shortcommand(fd, CMD_ID);
416 fds[devcnt].fd = fd;
417 fds[devcnt].events = G_IO_IN;
418 device_names[devcnt] = g_strdup(l->data);
419 devcnt++;
420 }
421 g_free(l->data);
422 }
423
424 /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
425 usleep(10000);
426
427 g_poll(fds, devcnt, 1);
428
429 for (i = 0; i < devcnt; i++) {
430 if (fds[i].revents != G_IO_IN)
431 continue;
432 if (serial_read(fds[i].fd, buf, 4) != 4)
433 continue;
434 if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
435 continue;
436
437 /* definitely using the OLS protocol, check if it supports
438 * the metadata command
439 */
440 send_shortcommand(fds[i].fd, CMD_METADATA);
441 probefd.fd = fds[i].fd;
442 probefd.events = G_IO_IN;
443 if (g_poll(&probefd, 1, 10) > 0) {
444 /* got metadata */
445 sdi = get_metadata(fds[i].fd);
446 sdi->index = final_devcnt;
447 } else {
448 /* not an OLS -- some other board that uses the sump protocol */
449 sdi = sr_device_instance_new(final_devcnt, SR_ST_INACTIVE,
450 "Sump", "Logic Analyzer", "v1.0");
451 ols = ols_device_new();
452 ols->num_probes = 32;
453 sdi->priv = ols;
454 }
455 ols->serial = sr_serial_device_instance_new(device_names[i], -1);
456 device_instances = g_slist_append(device_instances, sdi);
457 final_devcnt++;
458 serial_close(fds[i].fd);
459 fds[i].fd = 0;
460 }
461
462 /* clean up after all the probing */
463 for (i = 0; i < devcnt; i++) {
464 if (fds[i].fd != 0) {
465 serial_restore_params(fds[i].fd, serial_params[i]);
466 serial_close(fds[i].fd);
467 }
468 g_free(serial_params[i]);
469 g_free(device_names[i]);
470 }
471
472 g_free(serial_params);
473hw_init_free_device_names:
474 g_free(device_names);
475hw_init_free_fds:
476 g_free(fds);
477hw_init_free_ports:
478 g_slist_free(ports);
479
480 return final_devcnt;
481}
482
483static int hw_opendev(int device_index)
484{
485 struct sr_device_instance *sdi;
486 struct ols_device *ols;
487
488 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
489 return SR_ERR;
490
491 ols = sdi->priv;
492
493 ols->serial->fd = serial_open(ols->serial->port, O_RDWR);
494 if (ols->serial->fd == -1)
495 return SR_ERR;
496
497 sdi->status = SR_ST_ACTIVE;
498
499 return SR_OK;
500}
501
502static int hw_closedev(int device_index)
503{
504 struct sr_device_instance *sdi;
505 struct ols_device *ols;
506
507 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
508 sr_err("ols: %s: sdi was NULL", __func__);
509 return SR_ERR; /* TODO: SR_ERR_ARG? */
510 }
511
512 ols = sdi->priv;
513
514 /* TODO */
515 if (ols->serial->fd != -1) {
516 serial_close(ols->serial->fd);
517 ols->serial->fd = -1;
518 sdi->status = SR_ST_INACTIVE;
519 }
520
521 return SR_OK;
522}
523
524static void hw_cleanup(void)
525{
526 GSList *l;
527 struct sr_device_instance *sdi;
528 struct ols_device *ols;
529
530 /* Properly close and free all devices. */
531 for (l = device_instances; l; l = l->next) {
532 sdi = l->data;
533 ols = sdi->priv;
534 if (ols->serial->fd != -1)
535 serial_close(ols->serial->fd);
536 sr_serial_device_instance_free(ols->serial);
537 sr_device_instance_free(sdi);
538 }
539 g_slist_free(device_instances);
540 device_instances = NULL;
541}
542
543static void *hw_get_device_info(int device_index, int device_info_id)
544{
545 struct sr_device_instance *sdi;
546 struct ols_device *ols;
547 void *info;
548
549 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
550 return NULL;
551 ols = sdi->priv;
552
553 info = NULL;
554 switch (device_info_id) {
555 case SR_DI_INSTANCE:
556 info = sdi;
557 break;
558 case SR_DI_NUM_PROBES:
559 info = GINT_TO_POINTER(NUM_PROBES);
560 break;
561 case SR_DI_PROBE_NAMES:
562 info = probe_names;
563 break;
564 case SR_DI_SAMPLERATES:
565 info = &samplerates;
566 break;
567 case SR_DI_TRIGGER_TYPES:
568 info = (char *)TRIGGER_TYPES;
569 break;
570 case SR_DI_CUR_SAMPLERATE:
571 info = &ols->cur_samplerate;
572 break;
573 }
574
575 return info;
576}
577
578static int hw_get_status(int device_index)
579{
580 struct sr_device_instance *sdi;
581
582 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
583 return SR_ST_NOT_FOUND;
584
585 return sdi->status;
586}
587
588static int *hw_get_capabilities(void)
589{
590 return capabilities;
591}
592
593static int set_configuration_samplerate(struct sr_device_instance *sdi,
594 uint64_t samplerate)
595{
596 struct ols_device *ols;
597
598 ols = sdi->priv;
599 if (ols->max_samplerate) {
600 if (samplerate > ols->max_samplerate)
601 return SR_ERR_SAMPLERATE;
602 } else if (samplerate < samplerates.low || samplerate > samplerates.high)
603 return SR_ERR_SAMPLERATE;
604
605 if (samplerate > CLOCK_RATE) {
606 ols->flag_reg |= FLAG_DEMUX;
607 ols->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
608 } else {
609 ols->flag_reg &= ~FLAG_DEMUX;
610 ols->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
611 }
612
613 /* Calculate actual samplerate used and complain if it is different
614 * from the requested.
615 */
616 ols->cur_samplerate = CLOCK_RATE / (ols->cur_samplerate_divider + 1);
617 if (ols->flag_reg & FLAG_DEMUX)
618 ols->cur_samplerate *= 2;
619 if (ols->cur_samplerate != samplerate)
620 sr_err("ols: can't match samplerate %" PRIu64 ", using %"
621 PRIu64, samplerate, ols->cur_samplerate);
622
623 return SR_OK;
624}
625
626static int hw_set_configuration(int device_index, int capability, void *value)
627{
628 struct sr_device_instance *sdi;
629 struct ols_device *ols;
630 int ret;
631 uint64_t *tmp_u64;
632
633 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
634 return SR_ERR;
635 ols = sdi->priv;
636
637 if (sdi->status != SR_ST_ACTIVE)
638 return SR_ERR;
639
640 switch (capability) {
641 case SR_HWCAP_SAMPLERATE:
642 tmp_u64 = value;
643 ret = set_configuration_samplerate(sdi, *tmp_u64);
644 break;
645 case SR_HWCAP_PROBECONFIG:
646 ret = configure_probes(ols, (GSList *) value);
647 break;
648 case SR_HWCAP_LIMIT_SAMPLES:
649 tmp_u64 = value;
650 if (*tmp_u64 < MIN_NUM_SAMPLES)
651 return SR_ERR;
652 if (*tmp_u64 > ols->max_samples)
653 sr_err("ols: sample limit exceeds hw max");
654 ols->limit_samples = *tmp_u64;
655 sr_info("ols: sample limit %" PRIu64, ols->limit_samples);
656 ret = SR_OK;
657 break;
658 case SR_HWCAP_CAPTURE_RATIO:
659 tmp_u64 = value;
660 ols->capture_ratio = *tmp_u64;
661 if (ols->capture_ratio < 0 || ols->capture_ratio > 100) {
662 ols->capture_ratio = 0;
663 ret = SR_ERR;
664 } else
665 ret = SR_OK;
666 break;
667 case SR_HWCAP_RLE:
668 if (GPOINTER_TO_INT(value)) {
669 sr_info("ols: enabling RLE");
670 ols->flag_reg |= FLAG_RLE;
671 }
672 ret = SR_OK;
673 break;
674 default:
675 ret = SR_ERR;
676 }
677
678 return ret;
679}
680
681static int receive_data(int fd, int revents, void *session_data)
682{
683 struct sr_datafeed_packet packet;
684 struct sr_datafeed_logic logic;
685 struct sr_device_instance *sdi;
686 struct ols_device *ols;
687 GSList *l;
688 int num_channels, offset, i, j;
689 unsigned char byte;
690
691 /* find this device's ols_device struct by its fd */
692 ols = NULL;
693 for (l = device_instances; l; l = l->next) {
694 sdi = l->data;
695 if (ols->serial->fd == fd) {
696 ols = sdi->priv;
697 break;
698 }
699 }
700 if (!ols)
701 /* shouldn't happen */
702 return TRUE;
703
704 if (ols->num_transfers++ == 0) {
705 /*
706 * First time round, means the device started sending data,
707 * and will not stop until done. If it stops sending for
708 * longer than it takes to send a byte, that means it's
709 * finished. We'll double that to 30ms to be sure...
710 */
711 sr_source_remove(fd);
712 sr_source_add(fd, G_IO_IN, 30, receive_data, session_data);
713 ols->raw_sample_buf = g_try_malloc(ols->limit_samples * 4);
714 if (!ols->raw_sample_buf) {
715 sr_err("ols: %s: ols->raw_sample_buf malloc failed",
716 __func__);
717 return FALSE;
718 }
719 /* fill with 1010... for debugging */
720 memset(ols->raw_sample_buf, 0x82, ols->limit_samples * 4);
721 }
722
723 num_channels = 0;
724 for (i = 0x20; i > 0x02; i /= 2) {
725 if ((ols->flag_reg & i) == 0)
726 num_channels++;
727 }
728
729 if (revents == G_IO_IN) {
730 if (serial_read(fd, &byte, 1) != 1)
731 return FALSE;
732
733 /* Ignore it if we've read enough. */
734 if (ols->num_samples >= ols->limit_samples)
735 return TRUE;
736
737 ols->sample[ols->num_bytes++] = byte;
738 sr_dbg("ols: received byte 0x%.2x", byte);
739 if (ols->num_bytes == num_channels) {
740 /* Got a full sample. */
741 sr_dbg("ols: received sample 0x%.*x",
742 ols->num_bytes * 2, *(int *)ols->sample);
743 if (ols->flag_reg & FLAG_RLE) {
744 /*
745 * In RLE mode -1 should never come in as a
746 * sample, because bit 31 is the "count" flag.
747 */
748 if (ols->sample[ols->num_bytes - 1] & 0x80) {
749 ols->sample[ols->num_bytes - 1] &= 0x7f;
750 /*
751 * FIXME: This will only work on
752 * little-endian systems.
753 */
754 ols->rle_count = *(int *)(ols->sample);
755 sr_dbg("ols: RLE count = %d", ols->rle_count);
756 ols->num_bytes = 0;
757 return TRUE;
758 }
759 }
760 ols->num_samples += ols->rle_count + 1;
761 if (ols->num_samples > ols->limit_samples) {
762 /* Save us from overrunning the buffer. */
763 ols->rle_count -= ols->num_samples - ols->limit_samples;
764 ols->num_samples = ols->limit_samples;
765 }
766
767 if (num_channels < 4) {
768 /*
769 * Some channel groups may have been turned
770 * off, to speed up transfer between the
771 * hardware and the PC. Expand that here before
772 * submitting it over the session bus --
773 * whatever is listening on the bus will be
774 * expecting a full 32-bit sample, based on
775 * the number of probes.
776 */
777 j = 0;
778 memset(ols->tmp_sample, 0, 4);
779 for (i = 0; i < 4; i++) {
780 if (((ols->flag_reg >> 2) & (1 << i)) == 0) {
781 /*
782 * This channel group was
783 * enabled, copy from received
784 * sample.
785 */
786 ols->tmp_sample[i] = ols->sample[j++];
787 }
788 }
789 memcpy(ols->sample, ols->tmp_sample, 4);
790 sr_dbg("ols: full sample 0x%.8x", *(int *)ols->sample);
791 }
792
793 /* the OLS sends its sample buffer backwards.
794 * store it in reverse order here, so we can dump
795 * this on the session bus later.
796 */
797 offset = (ols->limit_samples - ols->num_samples) * 4;
798 for (i = 0; i <= ols->rle_count; i++) {
799 memcpy(ols->raw_sample_buf + offset + (i * 4),
800 ols->sample, 4);
801 }
802 memset(ols->sample, 0, 4);
803 ols->num_bytes = 0;
804 ols->rle_count = 0;
805 }
806 } else {
807 /*
808 * This is the main loop telling us a timeout was reached, or
809 * we've acquired all the samples we asked for -- we're done.
810 * Send the (properly-ordered) buffer to the frontend.
811 */
812 if (ols->trigger_at != -1) {
813 /* a trigger was set up, so we need to tell the frontend
814 * about it.
815 */
816 if (ols->trigger_at > 0) {
817 /* there are pre-trigger samples, send those first */
818 packet.type = SR_DF_LOGIC;
819 packet.payload = &logic;
820 logic.length = ols->trigger_at * 4;
821 logic.unitsize = 4;
822 logic.data = ols->raw_sample_buf +
823 (ols->limit_samples - ols->num_samples) * 4;
824 sr_session_bus(session_data, &packet);
825 }
826
827 /* send the trigger */
828 packet.type = SR_DF_TRIGGER;
829 sr_session_bus(session_data, &packet);
830
831 /* send post-trigger samples */
832 packet.type = SR_DF_LOGIC;
833 packet.payload = &logic;
834 logic.length = (ols->num_samples * 4) - (ols->trigger_at * 4);
835 logic.unitsize = 4;
836 logic.data = ols->raw_sample_buf + ols->trigger_at * 4 +
837 (ols->limit_samples - ols->num_samples) * 4;
838 sr_session_bus(session_data, &packet);
839 } else {
840 /* no trigger was used */
841 packet.type = SR_DF_LOGIC;
842 packet.payload = &logic;
843 logic.length = ols->num_samples * 4;
844 logic.unitsize = 4;
845 logic.data = ols->raw_sample_buf +
846 (ols->limit_samples - ols->num_samples) * 4;
847 sr_session_bus(session_data, &packet);
848 }
849 g_free(ols->raw_sample_buf);
850
851 serial_flush(fd);
852 serial_close(fd);
853 packet.type = SR_DF_END;
854 sr_session_bus(session_data, &packet);
855 }
856
857 return TRUE;
858}
859
860static int hw_start_acquisition(int device_index, gpointer session_data)
861{
862 struct sr_datafeed_packet *packet;
863 struct sr_datafeed_header *header;
864 struct sr_device_instance *sdi;
865 struct ols_device *ols;
866 uint32_t trigger_config[4];
867 uint32_t data;
868 uint16_t readcount, delaycount;
869 uint8_t changrp_mask;
870 int num_channels;
871 int i;
872
873 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
874 return SR_ERR;
875
876 ols = sdi->priv;
877
878 if (sdi->status != SR_ST_ACTIVE)
879 return SR_ERR;
880
881 /*
882 * Enable/disable channel groups in the flag register according to the
883 * probe mask. Calculate this here, because num_channels is needed
884 * to limit readcount.
885 */
886 changrp_mask = 0;
887 num_channels = 0;
888 for (i = 0; i < 4; i++) {
889 if (ols->probe_mask & (0xff << (i * 8))) {
890 changrp_mask |= (1 << i);
891 num_channels++;
892 }
893 }
894
895 /*
896 * Limit readcount to prevent reading past the end of the hardware
897 * buffer.
898 */
899 readcount = MIN(ols->max_samples / num_channels, ols->limit_samples) / 4;
900
901 memset(trigger_config, 0, 16);
902 trigger_config[ols->num_stages - 1] |= 0x08;
903 if (ols->trigger_mask[0]) {
904 delaycount = readcount * (1 - ols->capture_ratio / 100.0);
905 ols->trigger_at = (readcount - delaycount) * 4 - ols->num_stages;
906
907 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_MASK_0,
908 reverse32(ols->trigger_mask[0])) != SR_OK)
909 return SR_ERR;
910 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_VALUE_0,
911 reverse32(ols->trigger_value[0])) != SR_OK)
912 return SR_ERR;
913 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
914 trigger_config[0]) != SR_OK)
915 return SR_ERR;
916
917 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_MASK_1,
918 reverse32(ols->trigger_mask[1])) != SR_OK)
919 return SR_ERR;
920 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_VALUE_1,
921 reverse32(ols->trigger_value[1])) != SR_OK)
922 return SR_ERR;
923 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
924 trigger_config[1]) != SR_OK)
925 return SR_ERR;
926
927 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_MASK_2,
928 reverse32(ols->trigger_mask[2])) != SR_OK)
929 return SR_ERR;
930 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_VALUE_2,
931 reverse32(ols->trigger_value[2])) != SR_OK)
932 return SR_ERR;
933 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
934 trigger_config[2]) != SR_OK)
935 return SR_ERR;
936
937 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_MASK_3,
938 reverse32(ols->trigger_mask[3])) != SR_OK)
939 return SR_ERR;
940 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_VALUE_3,
941 reverse32(ols->trigger_value[3])) != SR_OK)
942 return SR_ERR;
943 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
944 trigger_config[3]) != SR_OK)
945 return SR_ERR;
946 } else {
947 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_MASK_0,
948 ols->trigger_mask[0]) != SR_OK)
949 return SR_ERR;
950 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_VALUE_0,
951 ols->trigger_value[0]) != SR_OK)
952 return SR_ERR;
953 if (send_longcommand(ols->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
954 0x00000008) != SR_OK)
955 return SR_ERR;
956 delaycount = readcount;
957 }
958
959 sr_info("ols: setting samplerate to %" PRIu64 " Hz (divider %u, "
960 "demux %s)", ols->cur_samplerate, ols->cur_samplerate_divider,
961 ols->flag_reg & FLAG_DEMUX ? "on" : "off");
962 if (send_longcommand(ols->serial->fd, CMD_SET_DIVIDER,
963 reverse32(ols->cur_samplerate_divider)) != SR_OK)
964 return SR_ERR;
965
966 /* Send sample limit and pre/post-trigger capture ratio. */
967 data = ((readcount - 1) & 0xffff) << 16;
968 data |= (delaycount - 1) & 0xffff;
969 if (send_longcommand(ols->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
970 return SR_ERR;
971
972 /* The flag register wants them here, and 1 means "disable channel". */
973 ols->flag_reg |= ~(changrp_mask << 2) & 0x3c;
974 ols->flag_reg |= FLAG_FILTER;
975 ols->rle_count = 0;
976 data = (ols->flag_reg << 24) | ((ols->flag_reg << 8) & 0xff0000);
977 if (send_longcommand(ols->serial->fd, CMD_SET_FLAGS, data) != SR_OK)
978 return SR_ERR;
979
980 /* Start acquisition on the device. */
981 if (send_shortcommand(ols->serial->fd, CMD_RUN) != SR_OK)
982 return SR_ERR;
983
984 sr_source_add(ols->serial->fd, G_IO_IN, -1, receive_data,
985 session_data);
986
987 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
988 sr_err("ols: %s: packet malloc failed", __func__);
989 return SR_ERR_MALLOC;
990 }
991
992 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
993 sr_err("ols: %s: header malloc failed", __func__);
994 g_free(packet);
995 return SR_ERR_MALLOC;
996 }
997
998 /* Send header packet to the session bus. */
999 packet->type = SR_DF_HEADER;
1000 packet->payload = (unsigned char *)header;
1001 header->feed_version = 1;
1002 gettimeofday(&header->starttime, NULL);
1003 header->samplerate = ols->cur_samplerate;
1004 header->num_logic_probes = NUM_PROBES;
1005 sr_session_bus(session_data, packet);
1006
1007 g_free(header);
1008 g_free(packet);
1009
1010 return SR_OK;
1011}
1012
1013static void hw_stop_acquisition(int device_index, gpointer session_device_id)
1014{
1015 struct sr_datafeed_packet packet;
1016
1017 /* Avoid compiler warnings. */
1018 (void)device_index;
1019
1020 packet.type = SR_DF_END;
1021 sr_session_bus(session_device_id, &packet);
1022}
1023
1024SR_PRIV struct sr_device_plugin ols_plugin_info = {
1025 .name = "ols",
1026 .longname = "Openbench Logic Sniffer",
1027 .api_version = 1,
1028 .init = hw_init,
1029 .cleanup = hw_cleanup,
1030 .opendev = hw_opendev,
1031 .closedev = hw_closedev,
1032 .get_device_info = hw_get_device_info,
1033 .get_status = hw_get_status,
1034 .get_capabilities = hw_get_capabilities,
1035 .set_configuration = hw_set_configuration,
1036 .start_acquisition = hw_start_acquisition,
1037 .stop_acquisition = hw_stop_acquisition,
1038};
Hardware access and backend lib