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