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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 <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <sys/time.h> | |
23 | #include <inttypes.h> | |
24 | #include <glib.h> | |
25 | #include <libusb.h> | |
26 | #include "config.h" | |
27 | #include "sigrok.h" | |
28 | ||
29 | #define USB_VENDOR 0x0925 | |
30 | #define USB_PRODUCT 0x3881 | |
31 | #define USB_VENDOR_NAME "Saleae" | |
32 | #define USB_MODEL_NAME "Logic" | |
33 | #define USB_MODEL_VERSION "" | |
34 | ||
35 | #define USB_INTERFACE 0 | |
36 | #define USB_CONFIGURATION 1 | |
37 | #define NUM_PROBES 8 | |
38 | #define NUM_TRIGGER_STAGES 4 | |
39 | #define TRIGGER_TYPES "01" | |
40 | #define FIRMWARE FIRMWARE_DIR "/saleae-logic.firmware" | |
41 | ||
42 | /* delay in ms */ | |
43 | #define FIRMWARE_RENUM_DELAY 2000 | |
44 | #define NUM_SIMUL_TRANSFERS 10 | |
45 | #define MAX_EMPTY_TRANSFERS NUM_SIMUL_TRANSFERS * 2 | |
46 | ||
47 | /* software trigger implementation: positive values indicate trigger stage */ | |
48 | #define TRIGGER_FIRED -1 | |
49 | ||
50 | ||
51 | /* there is only one model Saleae Logic, and this is what it supports */ | |
52 | static int capabilities[] = { | |
53 | HWCAP_LOGIC_ANALYZER, | |
54 | HWCAP_SAMPLERATE, | |
55 | ||
56 | /* these are really implemented in the driver, not the hardware */ | |
57 | HWCAP_LIMIT_SAMPLES, | |
58 | 0 | |
59 | }; | |
60 | ||
61 | /* list of struct sigrok_device_instance, maintained by opendev() and closedev() */ | |
62 | static GSList *device_instances = NULL; | |
63 | ||
64 | /* since we can't keep track of a Saleae Logic device after upgrading the | |
65 | * firmware -- it re-enumerates into a different device address after the | |
66 | * upgrade -- this is like a global lock. No device will open until a proper | |
67 | * delay after the last device was upgraded. | |
68 | */ | |
69 | GTimeVal firmware_updated = {0}; | |
70 | ||
71 | static libusb_context *usb_context = NULL; | |
72 | ||
73 | static uint64_t supported_samplerates[] = { | |
74 | KHZ(200), | |
75 | KHZ(250), | |
76 | KHZ(500), | |
77 | MHZ(1), | |
78 | MHZ(2), | |
79 | MHZ(4), | |
80 | MHZ(8), | |
81 | MHZ(12), | |
82 | MHZ(16), | |
83 | MHZ(24), | |
84 | 0 | |
85 | }; | |
86 | ||
87 | static struct samplerates samplerates = { | |
88 | KHZ(200), | |
89 | MHZ(24), | |
90 | 0, | |
91 | supported_samplerates | |
92 | }; | |
93 | ||
94 | /* TODO: all of these should go in a device-specific struct */ | |
95 | static uint64_t cur_samplerate = 0; | |
96 | static uint64_t limit_samples = 0; | |
97 | static uint8_t probe_mask = 0, \ | |
98 | trigger_mask[NUM_TRIGGER_STAGES] = {0}, \ | |
99 | trigger_value[NUM_TRIGGER_STAGES] = {0}, \ | |
100 | trigger_buffer[NUM_TRIGGER_STAGES] = {0};; | |
101 | int trigger_stage = TRIGGER_FIRED; | |
102 | ||
103 | ||
104 | static int hw_set_configuration(int device_index, int capability, void *value); | |
105 | ||
106 | ||
107 | /* returns 1 if the device's configuration profile match the Logic firmware's | |
108 | * configuration, 0 otherwise | |
109 | */ | |
110 | int check_conf_profile(libusb_device *dev) | |
111 | { | |
112 | struct libusb_device_descriptor des; | |
113 | struct libusb_config_descriptor *conf_dsc; | |
114 | const struct libusb_interface_descriptor *intf_dsc; | |
115 | int ret; | |
116 | ||
117 | ret = -1; | |
118 | conf_dsc = NULL; | |
119 | while(ret == -1) | |
120 | { | |
121 | /* assume it's not a Saleae Logic unless proven wrong */ | |
122 | ret = 0; | |
123 | ||
124 | if(libusb_get_device_descriptor(dev, &des) != 0) | |
125 | break; | |
126 | ||
127 | if(des.bNumConfigurations != 1) | |
128 | /* need exactly 1 configuration */ | |
129 | break; | |
130 | ||
131 | if(libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0) | |
132 | break; | |
133 | ||
134 | if(conf_dsc->bNumInterfaces != 1) | |
135 | /* need exactly 1 interface */ | |
136 | break; | |
137 | ||
138 | if(conf_dsc->interface[0].num_altsetting != 1) | |
139 | /* need just one alternate setting */ | |
140 | break; | |
141 | ||
142 | intf_dsc = &(conf_dsc->interface[0].altsetting[0]); | |
143 | if(intf_dsc->bNumEndpoints != 2) | |
144 | /* need 2 endpoints */ | |
145 | break; | |
146 | ||
147 | if((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) != (1 | LIBUSB_ENDPOINT_OUT)) | |
148 | /* first endpoint should be 1 (outbound) */ | |
149 | break; | |
150 | ||
151 | if((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) != (2 | LIBUSB_ENDPOINT_IN)) | |
152 | /* first endpoint should be 2 (inbound) */ | |
153 | break; | |
154 | ||
155 | /* if we made it here, it must be a Saleae Logic */ | |
156 | ret = 1; | |
157 | } | |
158 | if(conf_dsc) | |
159 | libusb_free_config_descriptor(conf_dsc); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
164 | ||
165 | struct sigrok_device_instance *sl_open_device(int device_index) | |
166 | { | |
167 | struct sigrok_device_instance *sdi; | |
168 | libusb_device **devlist; | |
169 | struct libusb_device_descriptor des; | |
170 | int err, skip, i; | |
171 | ||
172 | if(!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
173 | return NULL; | |
174 | ||
175 | libusb_get_device_list(usb_context, &devlist); | |
176 | if(sdi->status == ST_INITIALIZING) | |
177 | { | |
178 | /* this device was renumerating last time we touched it. opendev() guarantees we've | |
179 | * waited long enough for it to have booted properly, so now we need to find it on | |
180 | * the bus and record its new address. | |
181 | */ | |
182 | skip = 0; | |
183 | for(i = 0; devlist[i]; i++) | |
184 | { | |
185 | if( (err = libusb_get_device_descriptor(devlist[i], &des)) ) | |
186 | { | |
187 | g_warning("failed to get device descriptor: %d", err); | |
188 | continue; | |
189 | } | |
190 | ||
191 | if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT) | |
192 | { | |
193 | if(skip != device_index) | |
194 | { | |
195 | /* skip past devices of this type that aren't the one we want */ | |
196 | skip++; | |
197 | continue; | |
198 | } | |
199 | ||
200 | /* should check the bus here, since we know that already... but what | |
201 | * are we going to do if it doesn't match after the right number of skips? | |
202 | */ | |
203 | ||
204 | if( !(err = libusb_open(devlist[i], &(sdi->usb->devhdl))) ) | |
205 | { | |
206 | sdi->usb->address = libusb_get_device_address(devlist[i]); | |
207 | sdi->status = ST_ACTIVE; | |
208 | g_message("opened device %d on %d.%d interface %d", sdi->index, sdi->usb->bus, | |
209 | sdi->usb->address, USB_INTERFACE); | |
210 | } | |
211 | else | |
212 | { | |
213 | g_warning("failed to open device: %d", err); | |
214 | sdi = NULL; | |
215 | } | |
216 | } | |
217 | } | |
218 | } | |
219 | else if(sdi->status == ST_INACTIVE) | |
220 | { | |
221 | /* this device is fully enumerated, so we need to find this device by | |
222 | * vendor, product, bus and address */ | |
223 | libusb_get_device_list(usb_context, &devlist); | |
224 | for(i = 0; devlist[i]; i++) | |
225 | { | |
226 | if( (err = libusb_get_device_descriptor(devlist[i], &des)) ) | |
227 | { | |
228 | g_warning("failed to get device descriptor: %d", err); | |
229 | continue; | |
230 | } | |
231 | ||
232 | if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT) | |
233 | { | |
234 | if(libusb_get_bus_number(devlist[i]) == sdi->usb->bus && | |
235 | libusb_get_device_address(devlist[i]) == sdi->usb->address) | |
236 | { | |
237 | /* found it */ | |
238 | if( !(err = libusb_open(devlist[i], &(sdi->usb->devhdl))) ) | |
239 | { | |
240 | sdi->status = ST_ACTIVE; | |
241 | g_message("opened device %d on %d.%d interface %d", sdi->index, sdi->usb->bus, | |
242 | sdi->usb->address, USB_INTERFACE); | |
243 | } | |
244 | else | |
245 | { | |
246 | g_warning("failed to open device: %d", err); | |
247 | sdi = NULL; | |
248 | } | |
249 | } | |
250 | } | |
251 | } | |
252 | } | |
253 | else | |
254 | { | |
255 | /* status must be ST_ACTIVE, i.e. already in use... */ | |
256 | sdi = NULL; | |
257 | } | |
258 | libusb_free_device_list(devlist, 1); | |
259 | ||
260 | if(sdi && sdi->status != ST_ACTIVE) | |
261 | sdi = NULL; | |
262 | ||
263 | return sdi; | |
264 | } | |
265 | ||
266 | ||
267 | int upload_firmware(libusb_device *dev) | |
268 | { | |
269 | struct libusb_device_handle *hdl; | |
270 | int err; | |
271 | ||
272 | g_message("uploading firmware to device on %d.%d", | |
273 | libusb_get_bus_number(dev), libusb_get_device_address(dev)); | |
274 | ||
275 | err = libusb_open(dev, &hdl); | |
276 | if(err != 0) | |
277 | { | |
278 | g_warning("failed to open device: %d", err); | |
279 | return 1; | |
280 | } | |
281 | ||
282 | err = libusb_set_configuration(hdl, USB_CONFIGURATION); | |
283 | if(err != 0) | |
284 | { | |
285 | g_warning("Unable to set configuration: %d", err); | |
286 | return 1; | |
287 | } | |
288 | ||
289 | if((ezusb_reset(hdl, 1)) < 0) | |
290 | return 1; | |
291 | ||
292 | if(ezusb_install_firmware(hdl, FIRMWARE) != 0) | |
293 | return 1; | |
294 | ||
295 | if((ezusb_reset(hdl, 0)) < 0) | |
296 | return 1; | |
297 | ||
298 | libusb_close(hdl); | |
299 | ||
300 | /* remember when the last firmware update was done */ | |
301 | g_get_current_time(&firmware_updated); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | ||
307 | static void close_device(struct sigrok_device_instance *sdi) | |
308 | { | |
309 | ||
310 | if(sdi->usb->devhdl) | |
311 | { | |
312 | g_message("closing device %d on %d.%d interface %d", sdi->index, sdi->usb->bus, | |
313 | sdi->usb->address, USB_INTERFACE); | |
314 | libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE); | |
315 | libusb_close(sdi->usb->devhdl); | |
316 | sdi->usb->devhdl = NULL; | |
317 | sdi->status = ST_INACTIVE; | |
318 | } | |
319 | ||
320 | } | |
321 | ||
322 | ||
323 | static int configure_probes(GSList *probes) | |
324 | { | |
325 | struct probe *probe; | |
326 | GSList *l; | |
327 | int probe_bit, stage, i; | |
328 | char *tc; | |
329 | ||
330 | probe_mask = 0; | |
331 | for(i = 0; i < NUM_TRIGGER_STAGES; i++) | |
332 | { | |
333 | trigger_mask[i] = 0; | |
334 | trigger_value[i] = 0; | |
335 | } | |
336 | ||
337 | stage = -1; | |
338 | for(l = probes; l; l = l->next) | |
339 | { | |
340 | probe = (struct probe *) l->data; | |
341 | if(probe->enabled == FALSE) | |
342 | continue; | |
343 | probe_bit = 1 << (probe->index - 1); | |
344 | probe_mask |= probe_bit; | |
345 | if(probe->trigger) | |
346 | { | |
347 | stage = 0; | |
348 | for(tc = probe->trigger; *tc; tc++) | |
349 | { | |
350 | trigger_mask[stage] |= probe_bit; | |
351 | if(*tc == '1') | |
352 | trigger_value[stage] |= probe_bit; | |
353 | stage++; | |
354 | if(stage > NUM_TRIGGER_STAGES) | |
355 | return SIGROK_ERR; | |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | if(stage == -1) | |
361 | /* we didn't configure any triggers, make sure acquisition doesn't wait for any */ | |
362 | trigger_stage = TRIGGER_FIRED; | |
363 | else | |
364 | trigger_stage = 0; | |
365 | ||
366 | return SIGROK_OK; | |
367 | } | |
368 | ||
369 | ||
370 | ||
371 | /* | |
372 | * API callbacks | |
373 | */ | |
374 | ||
375 | static int hw_init(char *deviceinfo) | |
376 | { | |
377 | struct sigrok_device_instance *sdi; | |
378 | struct libusb_device_descriptor des; | |
379 | libusb_device **devlist; | |
380 | int err, devcnt, i; | |
381 | ||
382 | if(libusb_init(&usb_context) != 0) { | |
383 | g_warning("Failed to initialize USB."); | |
384 | return 0; | |
385 | } | |
386 | libusb_set_debug(usb_context, 3); | |
387 | ||
388 | /* find all Saleae Logic devices and upload firmware to all of them */ | |
389 | devcnt = 0; | |
390 | libusb_get_device_list(usb_context, &devlist); | |
391 | for(i = 0; devlist[i]; i++) { | |
392 | err = libusb_get_device_descriptor(devlist[i], &des); | |
393 | if(err != 0) { | |
394 | g_warning("failed to get device descriptor: %d", err); | |
395 | continue; | |
396 | } | |
397 | ||
398 | if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT) { | |
399 | /* definitely a Saleae Logic */ | |
400 | ||
401 | sdi = sigrok_device_instance_new(devcnt, ST_INITIALIZING, | |
402 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
403 | if(!sdi) | |
404 | return 0; | |
405 | device_instances = g_slist_append(device_instances, sdi); | |
406 | ||
407 | if(check_conf_profile(devlist[i]) == 0) | |
408 | { | |
409 | if(upload_firmware(devlist[i]) > 0) | |
410 | /* continue on the off chance that the device is in a working state */ | |
411 | /* TODO: could maybe try a USB reset, or uploading the firmware again... */ | |
412 | g_warning("firmware upload failed for device %d", devcnt); | |
413 | ||
414 | sdi->usb = usb_device_instance_new(libusb_get_bus_number(devlist[i]), 0, NULL); | |
415 | } | |
416 | else { | |
417 | /* already has the firmware on it, so fix the new address */ | |
418 | sdi->usb = usb_device_instance_new(libusb_get_bus_number(devlist[i]), | |
419 | libusb_get_device_address(devlist[i]), NULL); | |
420 | } | |
421 | devcnt++; | |
422 | } | |
423 | } | |
424 | libusb_free_device_list(devlist, 1); | |
425 | ||
426 | return devcnt; | |
427 | } | |
428 | ||
429 | ||
430 | static int hw_opendev(int device_index) | |
431 | { | |
432 | GTimeVal cur_time; | |
433 | struct sigrok_device_instance *sdi; | |
434 | int timediff, err; | |
435 | unsigned int cur, upd; | |
436 | ||
437 | if(firmware_updated.tv_sec > 0) { | |
438 | /* firmware was recently uploaded */ | |
439 | g_get_current_time(&cur_time); | |
440 | cur = cur_time.tv_sec * 1000 + cur_time.tv_usec / 1000; | |
441 | upd = firmware_updated.tv_sec * 1000 + firmware_updated.tv_usec / 1000; | |
442 | timediff = cur - upd; | |
443 | if(timediff < FIRMWARE_RENUM_DELAY) { | |
444 | timediff = FIRMWARE_RENUM_DELAY - timediff; | |
445 | g_message("waiting %d ms for device to reset", timediff); | |
446 | g_usleep(timediff * 1000); | |
447 | firmware_updated.tv_sec = 0; | |
448 | } | |
449 | } | |
450 | ||
451 | if( !(sdi = sl_open_device(device_index)) ) { | |
452 | g_warning("unable to open device"); | |
453 | return SIGROK_ERR; | |
454 | } | |
455 | ||
456 | err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE); | |
457 | if(err != 0) { | |
458 | g_warning("Unable to claim interface: %d", err); | |
459 | return SIGROK_ERR; | |
460 | } | |
461 | ||
462 | if(cur_samplerate == 0) { | |
463 | /* sample rate hasn't been set; default to the slowest it has */ | |
464 | if(hw_set_configuration(device_index, HWCAP_SAMPLERATE, &supported_samplerates[0]) == SIGROK_ERR) | |
465 | return SIGROK_ERR; | |
466 | } | |
467 | ||
468 | return SIGROK_OK; | |
469 | } | |
470 | ||
471 | ||
472 | static void hw_closedev(int device_index) | |
473 | { | |
474 | struct sigrok_device_instance *sdi; | |
475 | ||
476 | if( (sdi = get_sigrok_device_instance(device_instances, device_index)) ) | |
477 | close_device(sdi); | |
478 | ||
479 | } | |
480 | ||
481 | ||
482 | static void hw_cleanup(void) | |
483 | { | |
484 | GSList *l; | |
485 | ||
486 | /* properly close all devices */ | |
487 | for(l = device_instances; l; l = l->next) | |
488 | close_device( (struct sigrok_device_instance *) l->data); | |
489 | ||
490 | /* and free all their memory */ | |
491 | for(l = device_instances; l; l = l->next) | |
492 | g_free(l->data); | |
493 | g_slist_free(device_instances); | |
494 | device_instances = NULL; | |
495 | ||
496 | if(usb_context) | |
497 | libusb_exit(usb_context); | |
498 | usb_context = NULL; | |
499 | ||
500 | } | |
501 | ||
502 | ||
503 | static void *hw_get_device_info(int device_index, int device_info_id) | |
504 | { | |
505 | struct sigrok_device_instance *sdi; | |
506 | void *info; | |
507 | ||
508 | if( !(sdi = get_sigrok_device_instance(device_instances, device_index)) ) | |
509 | return NULL; | |
510 | ||
511 | info = NULL; | |
512 | switch(device_info_id) | |
513 | { | |
514 | case DI_INSTANCE: | |
515 | info = sdi; | |
516 | break; | |
517 | case DI_NUM_PROBES: | |
518 | info = GINT_TO_POINTER(NUM_PROBES); | |
519 | break; | |
520 | case DI_SAMPLERATES: | |
521 | info = &samplerates; | |
522 | break; | |
523 | case DI_TRIGGER_TYPES: | |
524 | info = TRIGGER_TYPES; | |
525 | break; | |
526 | case DI_CUR_SAMPLERATE: | |
527 | info = &cur_samplerate; | |
528 | break; | |
529 | } | |
530 | ||
531 | return info; | |
532 | } | |
533 | ||
534 | ||
535 | static int hw_get_status(int device_index) | |
536 | { | |
537 | struct sigrok_device_instance *sdi; | |
538 | ||
539 | sdi = get_sigrok_device_instance(device_instances, device_index); | |
540 | if(sdi) | |
541 | return sdi->status; | |
542 | else | |
543 | return ST_NOT_FOUND; | |
544 | } | |
545 | ||
546 | ||
547 | static int *hw_get_capabilities(void) | |
548 | { | |
549 | ||
550 | return capabilities; | |
551 | } | |
552 | ||
553 | ||
554 | static int set_configuration_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate) | |
555 | { | |
556 | uint8_t divider; | |
557 | int ret, result, i; | |
558 | unsigned char buf[2]; | |
559 | ||
560 | for(i = 0; supported_samplerates[i]; i++) { | |
561 | if(supported_samplerates[i] == samplerate) | |
562 | break; | |
563 | } | |
564 | if(supported_samplerates[i] == 0) | |
565 | return SIGROK_ERR_SAMPLERATE; | |
566 | ||
567 | divider = (uint8_t) (48 / (float) (samplerate/1000000)) - 1; | |
568 | ||
569 | g_message("setting samplerate to %"PRIu64" Hz (divider %d)", samplerate, divider); | |
570 | buf[0] = 0x01; | |
571 | buf[1] = divider; | |
572 | ret = libusb_bulk_transfer(sdi->usb->devhdl, 1 | LIBUSB_ENDPOINT_OUT, buf, 2, &result, 500); | |
573 | if(ret != 0) { | |
574 | g_warning("failed to set samplerate: %d", ret); | |
575 | return SIGROK_ERR; | |
576 | } | |
577 | cur_samplerate = samplerate; | |
578 | ||
579 | return SIGROK_OK; | |
580 | } | |
581 | ||
582 | ||
583 | static int hw_set_configuration(int device_index, int capability, void *value) | |
584 | { | |
585 | struct sigrok_device_instance *sdi; | |
586 | int ret; | |
587 | uint64_t *tmp_u64; | |
588 | ||
589 | if( !(sdi = get_sigrok_device_instance(device_instances, device_index)) ) | |
590 | return SIGROK_ERR; | |
591 | ||
592 | if(capability == HWCAP_SAMPLERATE) { | |
593 | tmp_u64 = value; | |
594 | ret = set_configuration_samplerate(sdi, *tmp_u64); | |
595 | } | |
596 | else if(capability == HWCAP_PROBECONFIG) | |
597 | ret = configure_probes( (GSList *) value); | |
598 | else if(capability == HWCAP_LIMIT_SAMPLES) { | |
599 | limit_samples = strtoull(value, NULL, 10); | |
600 | ret = SIGROK_OK; | |
601 | } | |
602 | else | |
603 | ret = SIGROK_ERR; | |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
608 | ||
609 | static int receive_data(int fd, int revents, void *user_data) | |
610 | { | |
611 | struct timeval tv; | |
612 | ||
613 | tv.tv_sec = tv.tv_usec = 0; | |
614 | libusb_handle_events_timeout(usb_context, &tv); | |
615 | ||
616 | return TRUE; | |
617 | } | |
618 | ||
619 | ||
620 | void receive_transfer(struct libusb_transfer *transfer) | |
621 | { | |
622 | static int num_samples = 0; | |
623 | static int empty_transfer_count = 0; | |
624 | ||
625 | struct datafeed_packet packet; | |
626 | void *user_data; | |
627 | int cur_buflen, trigger_offset, i; | |
628 | unsigned char *cur_buf, *new_buf; | |
629 | ||
630 | if(transfer == NULL) { | |
631 | /* hw_stop_acquisition() telling us to stop */ | |
632 | num_samples = -1; | |
633 | } | |
634 | ||
635 | if(num_samples == -1) { | |
636 | /* acquisition has already ended, just free any queued up transfer that come in */ | |
637 | libusb_free_transfer(transfer); | |
638 | } | |
639 | else { | |
640 | g_message("receive_transfer(): status %d received %d bytes", transfer->status, transfer->actual_length); | |
641 | ||
642 | /* save the incoming transfer before reusing the transfer struct */ | |
643 | cur_buf = transfer->buffer; | |
644 | cur_buflen = transfer->actual_length; | |
645 | user_data = transfer->user_data; | |
646 | ||
647 | /* fire off a new request */ | |
648 | new_buf = g_malloc(4096); | |
649 | transfer->buffer = new_buf; | |
650 | transfer->length = 4096; | |
651 | if(libusb_submit_transfer(transfer) != 0) { | |
652 | /* TODO: stop session? */ | |
653 | g_warning("eek"); | |
654 | } | |
655 | ||
656 | if(cur_buflen == 0) { | |
657 | empty_transfer_count++; | |
658 | if(empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
659 | /* the FX2 gave up... end the acquisition, the frontend will work | |
660 | * out that the samplecount is short | |
661 | */ | |
662 | packet.type = DF_END; | |
663 | session_bus(user_data, &packet); | |
664 | num_samples = -1; | |
665 | } | |
666 | return; | |
667 | } | |
668 | else | |
669 | empty_transfer_count = 0; | |
670 | ||
671 | trigger_offset = 0; | |
672 | if(trigger_stage >= 0) | |
673 | { | |
674 | for(i = 0; i < cur_buflen; i++) | |
675 | { | |
676 | if((cur_buf[i] & trigger_mask[trigger_stage]) == trigger_value[trigger_stage]) | |
677 | { | |
678 | /* match on this trigger stage */ | |
679 | trigger_buffer[trigger_stage] = cur_buf[i]; | |
680 | trigger_stage++; | |
681 | if(trigger_stage == NUM_TRIGGER_STAGES || trigger_mask[trigger_stage] == 0) | |
682 | { | |
683 | /* match on all trigger stages, we're done */ | |
684 | trigger_offset = i+1; | |
685 | ||
686 | /* TODO: send pre-trigger buffer to session bus */ | |
687 | ||
688 | /* tell the frontend we hit the trigger here */ | |
689 | packet.type = DF_TRIGGER; | |
690 | packet.length = 0; | |
691 | session_bus(user_data, &packet); | |
692 | ||
693 | /* send the samples that triggered it, since we're skipping past them */ | |
694 | packet.type = DF_LOGIC8; | |
695 | packet.length = trigger_stage; | |
696 | packet.payload = trigger_buffer; | |
697 | session_bus(user_data, &packet); | |
698 | break; | |
699 | ||
700 | trigger_stage = TRIGGER_FIRED; | |
701 | } | |
702 | } | |
703 | else if(trigger_stage > 0) | |
704 | { | |
705 | /* we had a match before, but not in the next sample. however, we may | |
706 | * have a match on this stage in the next bit -- trigger on 0001 will | |
707 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
708 | * the next sample from the one that matched originally, which the | |
709 | * counter increment at the end of the loop takes care of. | |
710 | */ | |
711 | i -= trigger_stage; | |
712 | if(i < -1) | |
713 | /* oops, went back past this buffer */ | |
714 | i = -1; | |
715 | /* reset trigger stage */ | |
716 | trigger_stage = 0; | |
717 | } | |
718 | } | |
719 | } | |
720 | ||
721 | if(trigger_stage == TRIGGER_FIRED) | |
722 | { | |
723 | /* send the incoming transfer to the session bus */ | |
724 | packet.type = DF_LOGIC8; | |
725 | packet.length = cur_buflen - trigger_offset; | |
726 | packet.payload = cur_buf + trigger_offset; | |
727 | session_bus(user_data, &packet); | |
728 | g_free(cur_buf); | |
729 | ||
730 | num_samples += cur_buflen; | |
731 | if(num_samples > limit_samples) | |
732 | { | |
733 | /* end the acquisition */ | |
734 | packet.type = DF_END; | |
735 | session_bus(user_data, &packet); | |
736 | num_samples = -1; | |
737 | } | |
738 | } | |
739 | else | |
740 | { | |
741 | /* TODO: buffer pre-trigger data in capture ratio-sized buffer */ | |
742 | ||
743 | } | |
744 | } | |
745 | ||
746 | } | |
747 | ||
748 | ||
749 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
750 | { | |
751 | struct sigrok_device_instance *sdi; | |
752 | struct datafeed_packet *packet; | |
753 | struct datafeed_header *header; | |
754 | struct libusb_transfer *transfer; | |
755 | const struct libusb_pollfd **lupfd; | |
756 | int size, i; | |
757 | unsigned char *buf; | |
758 | ||
759 | if( !(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
760 | return SIGROK_ERR; | |
761 | ||
762 | packet = g_malloc(sizeof(struct datafeed_packet)); | |
763 | header = g_malloc(sizeof(struct datafeed_header)); | |
764 | if(!packet || !header) | |
765 | return SIGROK_ERR; | |
766 | ||
767 | /* start with 2K transfer, subsequently increased to 4K */ | |
768 | size = 2048; | |
769 | for(i = 0; i < NUM_SIMUL_TRANSFERS; i++) { | |
770 | buf = g_malloc(size); | |
771 | transfer = libusb_alloc_transfer(0); | |
772 | libusb_fill_bulk_transfer(transfer, sdi->usb->devhdl, 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
773 | receive_transfer, session_device_id, 40); | |
774 | if(libusb_submit_transfer(transfer) != 0) { | |
775 | /* TODO: free them all */ | |
776 | libusb_free_transfer(transfer); | |
777 | g_free(buf); | |
778 | return SIGROK_ERR; | |
779 | } | |
780 | size = 4096; | |
781 | } | |
782 | ||
783 | lupfd = libusb_get_pollfds(usb_context); | |
784 | for(i = 0; lupfd[i]; i++) | |
785 | source_add(lupfd[i]->fd, lupfd[i]->events, -1, receive_data, NULL); | |
786 | free(lupfd); | |
787 | ||
788 | packet->type = DF_HEADER; | |
789 | packet->length = sizeof(struct datafeed_header); | |
790 | packet->payload = (unsigned char *) header; | |
791 | header->feed_version = 1; | |
792 | gettimeofday(&header->starttime, NULL); | |
793 | header->samplerate = cur_samplerate; | |
794 | header->protocol_id = PROTO_RAW; | |
795 | header->num_probes = NUM_PROBES; | |
796 | session_bus(session_device_id, packet); | |
797 | g_free(header); | |
798 | g_free(packet); | |
799 | ||
800 | return SIGROK_OK; | |
801 | } | |
802 | ||
803 | ||
804 | /* this stops acquisition on ALL devices, ignoring device_index */ | |
805 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
806 | { | |
807 | struct datafeed_packet packet; | |
808 | ||
809 | packet.type = DF_END; | |
810 | session_bus(session_device_id, &packet); | |
811 | ||
812 | receive_transfer(NULL); | |
813 | ||
814 | /* TODO: need to cancel and free any queued up transfers */ | |
815 | ||
816 | } | |
817 | ||
818 | ||
819 | ||
820 | struct device_plugin saleae_logic_plugin_info = { | |
821 | "saleae-logic", | |
822 | 1, | |
823 | hw_init, | |
824 | hw_cleanup, | |
825 | ||
826 | hw_opendev, | |
827 | hw_closedev, | |
828 | hw_get_device_info, | |
829 | hw_get_status, | |
830 | hw_get_capabilities, | |
831 | hw_set_configuration, | |
832 | hw_start_acquisition, | |
833 | hw_stop_acquisition | |
834 | }; | |
835 |