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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 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 "config.h" | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <sys/time.h> | |
24 | #include <inttypes.h> | |
25 | #include <glib.h> | |
26 | #include <libusb.h> | |
27 | #include "sigrok.h" | |
28 | #include "sigrok-internal.h" | |
29 | #include "saleae-logic.h" | |
30 | ||
31 | static struct fx2_profile supported_fx2[] = { | |
32 | /* Saleae Logic */ | |
33 | { 0x0925, 0x3881, 0x0925, 0x3881, "Saleae", "Logic", NULL, 8 }, | |
34 | /* default Cypress FX2 without EEPROM */ | |
35 | { 0x04b4, 0x8613, 0x0925, 0x3881, "Cypress", "FX2", NULL, 16 }, | |
36 | { 0, 0, 0, 0, 0, 0, 0, 0 } | |
37 | }; | |
38 | ||
39 | static int capabilities[] = { | |
40 | SR_HWCAP_LOGIC_ANALYZER, | |
41 | SR_HWCAP_SAMPLERATE, | |
42 | ||
43 | /* These are really implemented in the driver, not the hardware. */ | |
44 | SR_HWCAP_LIMIT_SAMPLES, | |
45 | SR_HWCAP_CONTINUOUS, | |
46 | 0, | |
47 | }; | |
48 | ||
49 | static const char *probe_names[] = { | |
50 | "0", | |
51 | "1", | |
52 | "2", | |
53 | "3", | |
54 | "4", | |
55 | "5", | |
56 | "6", | |
57 | "7", | |
58 | "8", | |
59 | "9", | |
60 | "10", | |
61 | "11", | |
62 | "12", | |
63 | "13", | |
64 | "14", | |
65 | "15", | |
66 | NULL, | |
67 | }; | |
68 | ||
69 | static uint64_t supported_samplerates[] = { | |
70 | SR_KHZ(200), | |
71 | SR_KHZ(250), | |
72 | SR_KHZ(500), | |
73 | SR_MHZ(1), | |
74 | SR_MHZ(2), | |
75 | SR_MHZ(4), | |
76 | SR_MHZ(8), | |
77 | SR_MHZ(12), | |
78 | SR_MHZ(16), | |
79 | SR_MHZ(24), | |
80 | 0, | |
81 | }; | |
82 | ||
83 | static struct sr_samplerates samplerates = { | |
84 | SR_KHZ(200), | |
85 | SR_MHZ(24), | |
86 | SR_HZ(0), | |
87 | supported_samplerates, | |
88 | }; | |
89 | ||
90 | /* List of struct sr_device_instance, maintained by opendev()/closedev(). */ | |
91 | static GSList *device_instances = NULL; | |
92 | static libusb_context *usb_context = NULL; | |
93 | ||
94 | static int hw_set_configuration(int device_index, int capability, void *value); | |
95 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); | |
96 | ||
97 | /** | |
98 | * Check the USB configuration to determine if this is a Saleae Logic. | |
99 | * | |
100 | * @return 1 if the device's configuration profile match the Logic firmware's | |
101 | * configuration, 0 otherwise. | |
102 | */ | |
103 | static int check_conf_profile(libusb_device *dev) | |
104 | { | |
105 | struct libusb_device_descriptor des; | |
106 | struct libusb_config_descriptor *conf_dsc = NULL; | |
107 | const struct libusb_interface_descriptor *intf_dsc; | |
108 | int ret = -1; | |
109 | ||
110 | while (ret == -1) { | |
111 | /* Assume it's not a Saleae Logic unless proven wrong. */ | |
112 | ret = 0; | |
113 | ||
114 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
115 | break; | |
116 | ||
117 | if (des.bNumConfigurations != 1) | |
118 | /* Need exactly 1 configuration. */ | |
119 | break; | |
120 | ||
121 | if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0) | |
122 | break; | |
123 | ||
124 | if (conf_dsc->bNumInterfaces != 1) | |
125 | /* Need exactly 1 interface. */ | |
126 | break; | |
127 | ||
128 | if (conf_dsc->interface[0].num_altsetting != 1) | |
129 | /* Need just one alternate setting. */ | |
130 | break; | |
131 | ||
132 | intf_dsc = &(conf_dsc->interface[0].altsetting[0]); | |
133 | if (intf_dsc->bNumEndpoints != 2) | |
134 | /* Need 2 endpoints. */ | |
135 | break; | |
136 | ||
137 | if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) != | |
138 | (1 | LIBUSB_ENDPOINT_OUT)) | |
139 | /* First endpoint should be 1 (outbound). */ | |
140 | break; | |
141 | ||
142 | if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) != | |
143 | (2 | LIBUSB_ENDPOINT_IN)) | |
144 | /* First endpoint should be 2 (inbound). */ | |
145 | break; | |
146 | ||
147 | /* If we made it here, it must be a Saleae Logic. */ | |
148 | ret = 1; | |
149 | } | |
150 | ||
151 | if (conf_dsc) | |
152 | libusb_free_config_descriptor(conf_dsc); | |
153 | ||
154 | return ret; | |
155 | } | |
156 | ||
157 | static int sl_open_device(int device_index) | |
158 | { | |
159 | libusb_device **devlist; | |
160 | struct libusb_device_descriptor des; | |
161 | struct sr_device_instance *sdi; | |
162 | struct fx2_device *fx2; | |
163 | int err, skip, i; | |
164 | ||
165 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
166 | return SR_ERR; | |
167 | fx2 = sdi->priv; | |
168 | ||
169 | if (sdi->status == SR_ST_ACTIVE) | |
170 | /* already in use */ | |
171 | return SR_ERR; | |
172 | ||
173 | skip = 0; | |
174 | libusb_get_device_list(usb_context, &devlist); | |
175 | for (i = 0; devlist[i]; i++) { | |
176 | if ((err = libusb_get_device_descriptor(devlist[i], &des))) { | |
177 | sr_warn("failed to get device descriptor: %d", err); | |
178 | continue; | |
179 | } | |
180 | ||
181 | if (des.idVendor != fx2->profile->fw_vid || des.idProduct != fx2->profile->fw_pid) | |
182 | continue; | |
183 | ||
184 | if (sdi->status == SR_ST_INITIALIZING) { | |
185 | if (skip != device_index) { | |
186 | /* Skip devices of this type that aren't the one we want. */ | |
187 | skip += 1; | |
188 | continue; | |
189 | } | |
190 | } else if (sdi->status == SR_ST_INACTIVE) { | |
191 | /* | |
192 | * This device is fully enumerated, so we need to find this | |
193 | * device by vendor, product, bus and address. | |
194 | */ | |
195 | if (libusb_get_bus_number(devlist[i]) != sdi->usb->bus | |
196 | || libusb_get_device_address(devlist[i]) != sdi->usb->address) | |
197 | /* this is not the one */ | |
198 | continue; | |
199 | } | |
200 | ||
201 | if (!(err = libusb_open(devlist[i], &sdi->usb->devhdl))) { | |
202 | if (sdi->usb->address == 0xff) | |
203 | /* | |
204 | * first time we touch this device after firmware upload, | |
205 | * so we don't know the address yet. | |
206 | */ | |
207 | sdi->usb->address = libusb_get_device_address(devlist[i]); | |
208 | ||
209 | sdi->status = SR_ST_ACTIVE; | |
210 | sr_info("saleae: opened device %d on %d.%d interface %d", | |
211 | sdi->index, sdi->usb->bus, | |
212 | sdi->usb->address, USB_INTERFACE); | |
213 | } else { | |
214 | sr_warn("failed to open device: %d", err); | |
215 | } | |
216 | ||
217 | /* if we made it here, we handled the device one way or another */ | |
218 | break; | |
219 | } | |
220 | libusb_free_device_list(devlist, 1); | |
221 | ||
222 | if (sdi->status != SR_ST_ACTIVE) | |
223 | return SR_ERR; | |
224 | ||
225 | return SR_OK; | |
226 | } | |
227 | ||
228 | static void close_device(struct sr_device_instance *sdi) | |
229 | { | |
230 | if (sdi->usb->devhdl == NULL) | |
231 | return; | |
232 | ||
233 | sr_info("saleae: closing device %d on %d.%d interface %d", sdi->index, | |
234 | sdi->usb->bus, sdi->usb->address, USB_INTERFACE); | |
235 | libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE); | |
236 | libusb_close(sdi->usb->devhdl); | |
237 | sdi->usb->devhdl = NULL; | |
238 | sdi->status = SR_ST_INACTIVE; | |
239 | } | |
240 | ||
241 | static int configure_probes(struct fx2_device *fx2, GSList *probes) | |
242 | { | |
243 | struct sr_probe *probe; | |
244 | GSList *l; | |
245 | int probe_bit, stage, i; | |
246 | char *tc; | |
247 | ||
248 | fx2->probe_mask = 0; | |
249 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
250 | fx2->trigger_mask[i] = 0; | |
251 | fx2->trigger_value[i] = 0; | |
252 | } | |
253 | ||
254 | stage = -1; | |
255 | for (l = probes; l; l = l->next) { | |
256 | probe = (struct sr_probe *)l->data; | |
257 | if (probe->enabled == FALSE) | |
258 | continue; | |
259 | probe_bit = 1 << (probe->index - 1); | |
260 | fx2->probe_mask |= probe_bit; | |
261 | if (!(probe->trigger)) | |
262 | continue; | |
263 | ||
264 | stage = 0; | |
265 | for (tc = probe->trigger; *tc; tc++) { | |
266 | fx2->trigger_mask[stage] |= probe_bit; | |
267 | if (*tc == '1') | |
268 | fx2->trigger_value[stage] |= probe_bit; | |
269 | stage++; | |
270 | if (stage > NUM_TRIGGER_STAGES) | |
271 | return SR_ERR; | |
272 | } | |
273 | } | |
274 | ||
275 | if (stage == -1) | |
276 | /* | |
277 | * We didn't configure any triggers, make sure acquisition | |
278 | * doesn't wait for any. | |
279 | */ | |
280 | fx2->trigger_stage = TRIGGER_FIRED; | |
281 | else | |
282 | fx2->trigger_stage = 0; | |
283 | ||
284 | return SR_OK; | |
285 | } | |
286 | ||
287 | static struct fx2_device *fx2_device_new(void) | |
288 | { | |
289 | struct fx2_device *fx2; | |
290 | ||
291 | if (!(fx2 = g_try_malloc0(sizeof(struct fx2_device)))) { | |
292 | sr_err("saleae: %s: saleae malloc failed", __func__); | |
293 | return NULL; | |
294 | } | |
295 | fx2->trigger_stage = TRIGGER_FIRED; | |
296 | ||
297 | return fx2; | |
298 | } | |
299 | ||
300 | ||
301 | /* | |
302 | * API callbacks | |
303 | */ | |
304 | ||
305 | static int hw_init(const char *deviceinfo) | |
306 | { | |
307 | struct sr_device_instance *sdi; | |
308 | struct libusb_device_descriptor des; | |
309 | struct fx2_profile *fx2_prof; | |
310 | struct fx2_device *fx2; | |
311 | libusb_device **devlist; | |
312 | int err, devcnt, i, j; | |
313 | ||
314 | /* Avoid compiler warnings. */ | |
315 | (void)deviceinfo; | |
316 | ||
317 | if (libusb_init(&usb_context) != 0) { | |
318 | sr_warn("Failed to initialize USB."); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* Find all Saleae Logic devices and upload firmware to all of them. */ | |
323 | devcnt = 0; | |
324 | libusb_get_device_list(usb_context, &devlist); | |
325 | for (i = 0; devlist[i]; i++) { | |
326 | fx2_prof = NULL; | |
327 | err = libusb_get_device_descriptor(devlist[i], &des); | |
328 | if (err != 0) { | |
329 | sr_warn("failed to get device descriptor: %d", err); | |
330 | continue; | |
331 | } | |
332 | ||
333 | for (j = 0; supported_fx2[j].orig_vid; j++) { | |
334 | if (des.idVendor == supported_fx2[j].orig_vid | |
335 | && des.idProduct == supported_fx2[j].orig_pid) { | |
336 | fx2_prof = &supported_fx2[j]; | |
337 | break; | |
338 | } | |
339 | } | |
340 | if (!fx2_prof) | |
341 | /* not a supported VID/PID */ | |
342 | continue; | |
343 | ||
344 | sdi = sr_device_instance_new(devcnt, SR_ST_INITIALIZING, | |
345 | fx2_prof->vendor, fx2_prof->model, fx2_prof->model_version); | |
346 | if (!sdi) | |
347 | return 0; | |
348 | fx2 = fx2_device_new(); | |
349 | fx2->profile = fx2_prof; | |
350 | sdi->priv = fx2; | |
351 | device_instances = g_slist_append(device_instances, sdi); | |
352 | ||
353 | if (check_conf_profile(devlist[i])) { | |
354 | /* Already has the firmware, so fix the new address. */ | |
355 | sdi->status = SR_ST_INACTIVE; | |
356 | sdi->usb = sr_usb_device_instance_new | |
357 | (libusb_get_bus_number(devlist[i]), | |
358 | libusb_get_device_address(devlist[i]), NULL); | |
359 | } else { | |
360 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, FIRMWARE) == SR_OK) | |
361 | /* Remember when the firmware on this device was updated */ | |
362 | g_get_current_time(&fx2->fw_updated); | |
363 | else | |
364 | sr_warn("firmware upload failed for device %d", devcnt); | |
365 | sdi->usb = sr_usb_device_instance_new | |
366 | (libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
367 | } | |
368 | devcnt++; | |
369 | } | |
370 | libusb_free_device_list(devlist, 1); | |
371 | ||
372 | return devcnt; | |
373 | } | |
374 | ||
375 | static int hw_opendev(int device_index) | |
376 | { | |
377 | GTimeVal cur_time; | |
378 | struct sr_device_instance *sdi; | |
379 | struct fx2_device *fx2; | |
380 | int timediff, err; | |
381 | ||
382 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
383 | return SR_ERR; | |
384 | fx2 = sdi->priv; | |
385 | ||
386 | /* | |
387 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms | |
388 | * for the FX2 to renumerate | |
389 | */ | |
390 | err = 0; | |
391 | if (GTV_TO_MSEC(fx2->fw_updated) > 0) { | |
392 | sr_info("saleae: waiting for device to reset"); | |
393 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
394 | g_usleep(300*1000); | |
395 | timediff = 0; | |
396 | while (timediff < MAX_RENUM_DELAY) { | |
397 | if ((err = sl_open_device(device_index)) == SR_OK) | |
398 | break; | |
399 | g_usleep(100*1000); | |
400 | g_get_current_time(&cur_time); | |
401 | timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(fx2->fw_updated); | |
402 | } | |
403 | sr_info("saleae: device came back after %d ms", timediff); | |
404 | } else { | |
405 | err = sl_open_device(device_index); | |
406 | } | |
407 | ||
408 | if (err != SR_OK) { | |
409 | sr_warn("unable to open device"); | |
410 | return SR_ERR; | |
411 | } | |
412 | fx2 = sdi->priv; | |
413 | ||
414 | err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE); | |
415 | if (err != 0) { | |
416 | sr_warn("Unable to claim interface: %d", err); | |
417 | return SR_ERR; | |
418 | } | |
419 | ||
420 | if (fx2->cur_samplerate == 0) { | |
421 | /* Samplerate hasn't been set; default to the slowest one. */ | |
422 | if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE, | |
423 | &supported_samplerates[0]) == SR_ERR) | |
424 | return SR_ERR; | |
425 | } | |
426 | ||
427 | return SR_OK; | |
428 | } | |
429 | ||
430 | static int hw_closedev(int device_index) | |
431 | { | |
432 | struct sr_device_instance *sdi; | |
433 | ||
434 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
435 | sr_err("logic: %s: sdi was NULL", __func__); | |
436 | return SR_ERR; /* TODO: SR_ERR_ARG? */ | |
437 | } | |
438 | ||
439 | /* TODO */ | |
440 | close_device(sdi); | |
441 | ||
442 | return SR_OK; | |
443 | } | |
444 | ||
445 | static void hw_cleanup(void) | |
446 | { | |
447 | GSList *l; | |
448 | ||
449 | /* Properly close all devices... */ | |
450 | for (l = device_instances; l; l = l->next) | |
451 | close_device((struct sr_device_instance *)l->data); | |
452 | ||
453 | /* ...and free all their memory. */ | |
454 | for (l = device_instances; l; l = l->next) | |
455 | g_free(l->data); | |
456 | g_slist_free(device_instances); | |
457 | device_instances = NULL; | |
458 | ||
459 | if (usb_context) | |
460 | libusb_exit(usb_context); | |
461 | usb_context = NULL; | |
462 | } | |
463 | ||
464 | static void *hw_get_device_info(int device_index, int device_info_id) | |
465 | { | |
466 | struct sr_device_instance *sdi; | |
467 | struct fx2_device *fx2; | |
468 | void *info = NULL; | |
469 | ||
470 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
471 | return NULL; | |
472 | fx2 = sdi->priv; | |
473 | ||
474 | switch (device_info_id) { | |
475 | case SR_DI_INSTANCE: | |
476 | info = sdi; | |
477 | break; | |
478 | case SR_DI_NUM_PROBES: | |
479 | info = GINT_TO_POINTER(fx2->profile->num_probes); | |
480 | break; | |
481 | case SR_DI_PROBE_NAMES: | |
482 | info = probe_names; | |
483 | break; | |
484 | case SR_DI_SAMPLERATES: | |
485 | info = &samplerates; | |
486 | break; | |
487 | case SR_DI_TRIGGER_TYPES: | |
488 | info = TRIGGER_TYPES; | |
489 | break; | |
490 | case SR_DI_CUR_SAMPLERATE: | |
491 | info = &fx2->cur_samplerate; | |
492 | break; | |
493 | } | |
494 | ||
495 | return info; | |
496 | } | |
497 | ||
498 | static int hw_get_status(int device_index) | |
499 | { | |
500 | struct sr_device_instance *sdi; | |
501 | ||
502 | sdi = sr_get_device_instance(device_instances, device_index); | |
503 | if (sdi) | |
504 | return sdi->status; | |
505 | else | |
506 | return SR_ST_NOT_FOUND; | |
507 | } | |
508 | ||
509 | static int *hw_get_capabilities(void) | |
510 | { | |
511 | return capabilities; | |
512 | } | |
513 | ||
514 | static int set_configuration_samplerate(struct sr_device_instance *sdi, | |
515 | uint64_t samplerate) | |
516 | { | |
517 | struct fx2_device *fx2; | |
518 | uint8_t divider; | |
519 | int ret, result, i; | |
520 | unsigned char buf[2]; | |
521 | ||
522 | fx2 = sdi->priv; | |
523 | for (i = 0; supported_samplerates[i]; i++) { | |
524 | if (supported_samplerates[i] == samplerate) | |
525 | break; | |
526 | } | |
527 | if (supported_samplerates[i] == 0) | |
528 | return SR_ERR_SAMPLERATE; | |
529 | ||
530 | divider = (uint8_t) (48 / (samplerate / 1000000.0)) - 1; | |
531 | ||
532 | sr_info("saleae: setting samplerate to %" PRIu64 " Hz (divider %d)", | |
533 | samplerate, divider); | |
534 | buf[0] = 0x01; | |
535 | buf[1] = divider; | |
536 | ret = libusb_bulk_transfer(sdi->usb->devhdl, 1 | LIBUSB_ENDPOINT_OUT, | |
537 | buf, 2, &result, 500); | |
538 | if (ret != 0) { | |
539 | sr_warn("failed to set samplerate: %d", ret); | |
540 | return SR_ERR; | |
541 | } | |
542 | fx2->cur_samplerate = samplerate; | |
543 | fx2->period_ps = 1000000000000 / samplerate; | |
544 | ||
545 | return SR_OK; | |
546 | } | |
547 | ||
548 | static int hw_set_configuration(int device_index, int capability, void *value) | |
549 | { | |
550 | struct sr_device_instance *sdi; | |
551 | struct fx2_device *fx2; | |
552 | int ret; | |
553 | uint64_t *tmp_u64; | |
554 | ||
555 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
556 | return SR_ERR; | |
557 | fx2 = sdi->priv; | |
558 | ||
559 | if (capability == SR_HWCAP_SAMPLERATE) { | |
560 | tmp_u64 = value; | |
561 | ret = set_configuration_samplerate(sdi, *tmp_u64); | |
562 | } else if (capability == SR_HWCAP_PROBECONFIG) { | |
563 | ret = configure_probes(fx2, (GSList *) value); | |
564 | } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { | |
565 | tmp_u64 = value; | |
566 | fx2->limit_samples = *tmp_u64; | |
567 | ret = SR_OK; | |
568 | } else { | |
569 | ret = SR_ERR; | |
570 | } | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
575 | static int receive_data(int fd, int revents, void *user_data) | |
576 | { | |
577 | struct timeval tv; | |
578 | ||
579 | /* Avoid compiler warnings. */ | |
580 | (void)fd; | |
581 | (void)revents; | |
582 | (void)user_data; | |
583 | ||
584 | tv.tv_sec = tv.tv_usec = 0; | |
585 | libusb_handle_events_timeout(usb_context, &tv); | |
586 | ||
587 | return TRUE; | |
588 | } | |
589 | ||
590 | static void receive_transfer(struct libusb_transfer *transfer) | |
591 | { | |
592 | /* TODO: these statics have to move to fx2_device struct */ | |
593 | static int num_samples = 0; | |
594 | static int empty_transfer_count = 0; | |
595 | struct sr_datafeed_packet packet; | |
596 | struct sr_datafeed_logic logic; | |
597 | struct fx2_device *fx2; | |
598 | int cur_buflen, trigger_offset, i; | |
599 | unsigned char *cur_buf, *new_buf; | |
600 | ||
601 | /* hw_stop_acquisition() is telling us to stop. */ | |
602 | if (transfer == NULL) | |
603 | num_samples = -1; | |
604 | ||
605 | /* | |
606 | * If acquisition has already ended, just free any queued up | |
607 | * transfer that come in. | |
608 | */ | |
609 | if (num_samples == -1) { | |
610 | if (transfer) | |
611 | libusb_free_transfer(transfer); | |
612 | return; | |
613 | } | |
614 | ||
615 | sr_info("saleae: receive_transfer(): status %d received %d bytes", | |
616 | transfer->status, transfer->actual_length); | |
617 | ||
618 | /* Save incoming transfer before reusing the transfer struct. */ | |
619 | cur_buf = transfer->buffer; | |
620 | cur_buflen = transfer->actual_length; | |
621 | fx2 = transfer->user_data; | |
622 | ||
623 | /* Fire off a new request. */ | |
624 | if (!(new_buf = g_try_malloc(4096))) { | |
625 | sr_err("saleae: %s: new_buf malloc failed", __func__); | |
626 | // return SR_ERR_MALLOC; | |
627 | return; /* FIXME */ | |
628 | } | |
629 | ||
630 | transfer->buffer = new_buf; | |
631 | transfer->length = 4096; | |
632 | if (libusb_submit_transfer(transfer) != 0) { | |
633 | /* TODO: Stop session? */ | |
634 | sr_warn("eek"); | |
635 | } | |
636 | ||
637 | if (cur_buflen == 0) { | |
638 | empty_transfer_count++; | |
639 | if (empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
640 | /* | |
641 | * The FX2 gave up. End the acquisition, the frontend | |
642 | * will work out that the samplecount is short. | |
643 | */ | |
644 | hw_stop_acquisition(-1, fx2->session_data); | |
645 | } | |
646 | return; | |
647 | } else { | |
648 | empty_transfer_count = 0; | |
649 | } | |
650 | ||
651 | trigger_offset = 0; | |
652 | if (fx2->trigger_stage >= 0) { | |
653 | for (i = 0; i < cur_buflen; i++) { | |
654 | ||
655 | if ((cur_buf[i] & fx2->trigger_mask[fx2->trigger_stage]) == fx2->trigger_value[fx2->trigger_stage]) { | |
656 | /* Match on this trigger stage. */ | |
657 | fx2->trigger_buffer[fx2->trigger_stage] = cur_buf[i]; | |
658 | fx2->trigger_stage++; | |
659 | ||
660 | if (fx2->trigger_stage == NUM_TRIGGER_STAGES || fx2->trigger_mask[fx2->trigger_stage] == 0) { | |
661 | /* Match on all trigger stages, we're done. */ | |
662 | trigger_offset = i + 1; | |
663 | ||
664 | /* | |
665 | * TODO: Send pre-trigger buffer to session bus. | |
666 | * Tell the frontend we hit the trigger here. | |
667 | */ | |
668 | packet.type = SR_DF_TRIGGER; | |
669 | packet.timeoffset = (num_samples + i) * fx2->period_ps; | |
670 | packet.duration = 0; | |
671 | packet.payload = NULL; | |
672 | sr_session_bus(fx2->session_data, &packet); | |
673 | ||
674 | /* | |
675 | * Send the samples that triggered it, since we're | |
676 | * skipping past them. | |
677 | */ | |
678 | packet.type = SR_DF_LOGIC; | |
679 | packet.timeoffset = (num_samples + i) * fx2->period_ps; | |
680 | packet.duration = fx2->trigger_stage * fx2->period_ps; | |
681 | packet.payload = &logic; | |
682 | logic.length = fx2->trigger_stage; | |
683 | logic.unitsize = 1; | |
684 | logic.data = fx2->trigger_buffer; | |
685 | sr_session_bus(fx2->session_data, &packet); | |
686 | ||
687 | fx2->trigger_stage = TRIGGER_FIRED; | |
688 | break; | |
689 | } | |
690 | return; | |
691 | } | |
692 | ||
693 | /* | |
694 | * We had a match before, but not in the next sample. However, we may | |
695 | * have a match on this stage in the next bit -- trigger on 0001 will | |
696 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
697 | * the next sample from the one that matched originally, which the | |
698 | * counter increment at the end of the loop takes care of. | |
699 | */ | |
700 | if (fx2->trigger_stage > 0) { | |
701 | i -= fx2->trigger_stage; | |
702 | if (i < -1) | |
703 | i = -1; /* Oops, went back past this buffer. */ | |
704 | /* Reset trigger stage. */ | |
705 | fx2->trigger_stage = 0; | |
706 | } | |
707 | } | |
708 | } | |
709 | ||
710 | if (fx2->trigger_stage == TRIGGER_FIRED) { | |
711 | /* Send the incoming transfer to the session bus. */ | |
712 | packet.type = SR_DF_LOGIC; | |
713 | packet.timeoffset = num_samples * fx2->period_ps; | |
714 | packet.duration = cur_buflen * fx2->period_ps; | |
715 | packet.payload = &logic; | |
716 | logic.length = cur_buflen - trigger_offset; | |
717 | logic.unitsize = 1; | |
718 | logic.data = cur_buf + trigger_offset; | |
719 | sr_session_bus(fx2->session_data, &packet); | |
720 | g_free(cur_buf); | |
721 | ||
722 | num_samples += cur_buflen; | |
723 | if (fx2->limit_samples && (unsigned int) num_samples > fx2->limit_samples) { | |
724 | hw_stop_acquisition(-1, fx2->session_data); | |
725 | } | |
726 | } else { | |
727 | /* | |
728 | * TODO: Buffer pre-trigger data in capture | |
729 | * ratio-sized buffer. | |
730 | */ | |
731 | } | |
732 | } | |
733 | ||
734 | static int hw_start_acquisition(int device_index, gpointer session_data) | |
735 | { | |
736 | struct sr_device_instance *sdi; | |
737 | struct sr_datafeed_packet *packet; | |
738 | struct sr_datafeed_header *header; | |
739 | struct fx2_device *fx2; | |
740 | struct libusb_transfer *transfer; | |
741 | const struct libusb_pollfd **lupfd; | |
742 | int size, i; | |
743 | unsigned char *buf; | |
744 | ||
745 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
746 | return SR_ERR; | |
747 | fx2 = sdi->priv; | |
748 | fx2->session_data = session_data; | |
749 | ||
750 | if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { | |
751 | sr_err("saleae: %s: packet malloc failed", __func__); | |
752 | return SR_ERR_MALLOC; | |
753 | } | |
754 | ||
755 | if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { | |
756 | sr_err("saleae: %s: header malloc failed", __func__); | |
757 | return SR_ERR_MALLOC; | |
758 | } | |
759 | ||
760 | /* Start with 2K transfer, subsequently increased to 4K. */ | |
761 | size = 2048; | |
762 | for (i = 0; i < NUM_SIMUL_TRANSFERS; i++) { | |
763 | if (!(buf = g_try_malloc(size))) { | |
764 | sr_err("saleae: %s: buf malloc failed", __func__); | |
765 | return SR_ERR_MALLOC; | |
766 | } | |
767 | transfer = libusb_alloc_transfer(0); | |
768 | libusb_fill_bulk_transfer(transfer, sdi->usb->devhdl, | |
769 | 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
770 | receive_transfer, fx2, 40); | |
771 | if (libusb_submit_transfer(transfer) != 0) { | |
772 | /* TODO: Free them all. */ | |
773 | libusb_free_transfer(transfer); | |
774 | g_free(buf); | |
775 | return SR_ERR; | |
776 | } | |
777 | size = 4096; | |
778 | } | |
779 | ||
780 | lupfd = libusb_get_pollfds(usb_context); | |
781 | for (i = 0; lupfd[i]; i++) | |
782 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, 40, receive_data, | |
783 | NULL); | |
784 | free(lupfd); | |
785 | ||
786 | packet->type = SR_DF_HEADER; | |
787 | packet->payload = header; | |
788 | header->feed_version = 1; | |
789 | gettimeofday(&header->starttime, NULL); | |
790 | header->samplerate = fx2->cur_samplerate; | |
791 | header->num_logic_probes = fx2->profile->num_probes; | |
792 | header->num_analog_probes = 0; | |
793 | sr_session_bus(session_data, packet); | |
794 | g_free(header); | |
795 | g_free(packet); | |
796 | ||
797 | return SR_OK; | |
798 | } | |
799 | ||
800 | /* This stops acquisition on ALL devices, ignoring device_index. */ | |
801 | static void hw_stop_acquisition(int device_index, gpointer session_data) | |
802 | { | |
803 | struct sr_datafeed_packet packet; | |
804 | ||
805 | /* Avoid compiler warnings. */ | |
806 | (void)device_index; | |
807 | ||
808 | packet.type = SR_DF_END; | |
809 | sr_session_bus(session_data, &packet); | |
810 | ||
811 | receive_transfer(NULL); | |
812 | ||
813 | /* TODO: Need to cancel and free any queued up transfers. */ | |
814 | } | |
815 | ||
816 | struct sr_device_plugin saleae_logic_plugin_info = { | |
817 | .name = "saleae-logic", | |
818 | .longname = "Saleae Logic", | |
819 | .api_version = 1, | |
820 | .init = hw_init, | |
821 | .cleanup = hw_cleanup, | |
822 | .opendev = hw_opendev, | |
823 | .closedev = hw_closedev, | |
824 | .get_device_info = hw_get_device_info, | |
825 | .get_status = hw_get_status, | |
826 | .get_capabilities = hw_get_capabilities, | |
827 | .set_configuration = hw_set_configuration, | |
828 | .start_acquisition = hw_start_acquisition, | |
829 | .stop_acquisition = hw_stop_acquisition, | |
830 | }; |