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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 | ||
30 | #define USB_VENDOR 0x0925 | |
31 | #define USB_PRODUCT 0x3881 | |
32 | #define USB_VENDOR_NAME "Saleae" | |
33 | #define USB_MODEL_NAME "Logic" | |
34 | #define USB_MODEL_VERSION "" | |
35 | ||
36 | #define USB_INTERFACE 0 | |
37 | #define USB_CONFIGURATION 1 | |
38 | #define NUM_PROBES 8 | |
39 | #define NUM_TRIGGER_STAGES 4 | |
40 | #define TRIGGER_TYPES "01" | |
41 | #define FIRMWARE FIRMWARE_DIR "/saleae-logic.fw" | |
42 | ||
43 | /* delay in ms */ | |
44 | #define FIRMWARE_RENUM_DELAY 2000 | |
45 | #define NUM_SIMUL_TRANSFERS 10 | |
46 | #define MAX_EMPTY_TRANSFERS (NUM_SIMUL_TRANSFERS * 2) | |
47 | ||
48 | /* Software trigger implementation: positive values indicate trigger stage. */ | |
49 | #define TRIGGER_FIRED -1 | |
50 | ||
51 | /* There is only one model Saleae Logic, and this is what it supports: */ | |
52 | static int capabilities[] = { | |
53 | SR_HWCAP_LOGIC_ANALYZER, | |
54 | SR_HWCAP_SAMPLERATE, | |
55 | ||
56 | /* These are really implemented in the driver, not the hardware. */ | |
57 | SR_HWCAP_LIMIT_SAMPLES, | |
58 | SR_HWCAP_CONTINUOUS, | |
59 | 0, | |
60 | }; | |
61 | ||
62 | /* List of struct sr_device_instance, maintained by opendev()/closedev(). */ | |
63 | static GSList *device_instances = NULL; | |
64 | ||
65 | /* | |
66 | * Since we can't keep track of a Saleae Logic device after upgrading the | |
67 | * firmware -- it re-enumerates into a different device address after the | |
68 | * upgrade -- this is like a global lock. No device will open until a proper | |
69 | * delay after the last device was upgraded. | |
70 | */ | |
71 | static GTimeVal firmware_updated = { 0, 0 }; | |
72 | ||
73 | static libusb_context *usb_context = NULL; | |
74 | ||
75 | static uint64_t supported_samplerates[] = { | |
76 | SR_KHZ(200), | |
77 | SR_KHZ(250), | |
78 | SR_KHZ(500), | |
79 | SR_MHZ(1), | |
80 | SR_MHZ(2), | |
81 | SR_MHZ(4), | |
82 | SR_MHZ(8), | |
83 | SR_MHZ(12), | |
84 | SR_MHZ(16), | |
85 | SR_MHZ(24), | |
86 | 0, | |
87 | }; | |
88 | ||
89 | static struct sr_samplerates samplerates = { | |
90 | SR_KHZ(200), | |
91 | SR_MHZ(24), | |
92 | SR_HZ(0), | |
93 | supported_samplerates, | |
94 | }; | |
95 | ||
96 | /* TODO: All of these should go in a device-specific struct. */ | |
97 | static uint64_t cur_samplerate = 0; | |
98 | static uint64_t limit_samples = 0; | |
99 | static uint8_t probe_mask = 0; | |
100 | static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 }; | |
101 | static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 }; | |
102 | static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 }; | |
103 | ||
104 | static int trigger_stage = TRIGGER_FIRED; | |
105 | ||
106 | static int hw_set_configuration(int device_index, int capability, void *value); | |
107 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); | |
108 | ||
109 | /** | |
110 | * Check the USB configuration to determine if this is a Saleae Logic. | |
111 | * | |
112 | * @return 1 if the device's configuration profile match the Logic firmware's | |
113 | * configuration, 0 otherwise. | |
114 | */ | |
115 | static int check_conf_profile(libusb_device *dev) | |
116 | { | |
117 | struct libusb_device_descriptor des; | |
118 | struct libusb_config_descriptor *conf_dsc = NULL; | |
119 | const struct libusb_interface_descriptor *intf_dsc; | |
120 | int ret = -1; | |
121 | ||
122 | while (ret == -1) { | |
123 | /* Assume it's not a Saleae Logic unless proven wrong. */ | |
124 | ret = 0; | |
125 | ||
126 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
127 | break; | |
128 | ||
129 | if (des.bNumConfigurations != 1) | |
130 | /* Need exactly 1 configuration. */ | |
131 | break; | |
132 | ||
133 | if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0) | |
134 | break; | |
135 | ||
136 | if (conf_dsc->bNumInterfaces != 1) | |
137 | /* Need exactly 1 interface. */ | |
138 | break; | |
139 | ||
140 | if (conf_dsc->interface[0].num_altsetting != 1) | |
141 | /* Need just one alternate setting. */ | |
142 | break; | |
143 | ||
144 | intf_dsc = &(conf_dsc->interface[0].altsetting[0]); | |
145 | if (intf_dsc->bNumEndpoints != 2) | |
146 | /* Need 2 endpoints. */ | |
147 | break; | |
148 | ||
149 | if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) != | |
150 | (1 | LIBUSB_ENDPOINT_OUT)) | |
151 | /* First endpoint should be 1 (outbound). */ | |
152 | break; | |
153 | ||
154 | if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) != | |
155 | (2 | LIBUSB_ENDPOINT_IN)) | |
156 | /* First endpoint should be 2 (inbound). */ | |
157 | break; | |
158 | ||
159 | /* If we made it here, it must be a Saleae Logic. */ | |
160 | ret = 1; | |
161 | } | |
162 | ||
163 | if (conf_dsc) | |
164 | libusb_free_config_descriptor(conf_dsc); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | static struct sr_device_instance *sl_open_device(int device_index) | |
170 | { | |
171 | struct sr_device_instance *sdi; | |
172 | libusb_device **devlist; | |
173 | struct libusb_device_descriptor des; | |
174 | int err, skip, i; | |
175 | ||
176 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
177 | return NULL; | |
178 | ||
179 | libusb_get_device_list(usb_context, &devlist); | |
180 | if (sdi->status == SR_ST_INITIALIZING) { | |
181 | /* | |
182 | * This device was renumerating last time we touched it. | |
183 | * opendev() guarantees we've waited long enough for it to | |
184 | * have booted properly, so now we need to find it on | |
185 | * the bus and record its new address. | |
186 | */ | |
187 | skip = 0; | |
188 | for (i = 0; devlist[i]; i++) { | |
189 | /* TODO: Error handling. */ | |
190 | err = opendev2(device_index, &sdi, devlist[i], &des, | |
191 | &skip, USB_VENDOR, USB_PRODUCT, | |
192 | USB_INTERFACE); | |
193 | } | |
194 | } else if (sdi->status == SR_ST_INACTIVE) { | |
195 | /* | |
196 | * This device is fully enumerated, so we need to find this | |
197 | * device by vendor, product, bus and address. | |
198 | */ | |
199 | libusb_get_device_list(usb_context, &devlist); | |
200 | for (i = 0; devlist[i]; i++) { | |
201 | /* TODO: Error handling. */ | |
202 | err = opendev3(&sdi, devlist[i], &des, USB_VENDOR, | |
203 | USB_PRODUCT, USB_INTERFACE); | |
204 | } | |
205 | } else { | |
206 | /* Status must be SR_ST_ACTIVE, i.e. already in use... */ | |
207 | sdi = NULL; | |
208 | } | |
209 | libusb_free_device_list(devlist, 1); | |
210 | ||
211 | if (sdi && sdi->status != SR_ST_ACTIVE) | |
212 | sdi = NULL; | |
213 | ||
214 | return sdi; | |
215 | } | |
216 | ||
217 | static int upload_firmware(libusb_device *dev) | |
218 | { | |
219 | int ret; | |
220 | ||
221 | ret = ezusb_upload_firmware(dev, USB_CONFIGURATION, FIRMWARE); | |
222 | if (ret != 0) | |
223 | return 1; | |
224 | ||
225 | /* Remember when the last firmware update was done. */ | |
226 | g_get_current_time(&firmware_updated); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static void close_device(struct sr_device_instance *sdi) | |
232 | { | |
233 | if (sdi->usb->devhdl == NULL) | |
234 | return; | |
235 | ||
236 | sr_info("saleae: closing device %d on %d.%d interface %d", sdi->index, | |
237 | sdi->usb->bus, sdi->usb->address, USB_INTERFACE); | |
238 | libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE); | |
239 | libusb_close(sdi->usb->devhdl); | |
240 | sdi->usb->devhdl = NULL; | |
241 | sdi->status = SR_ST_INACTIVE; | |
242 | } | |
243 | ||
244 | static int configure_probes(GSList *probes) | |
245 | { | |
246 | struct sr_probe *probe; | |
247 | GSList *l; | |
248 | int probe_bit, stage, i; | |
249 | char *tc; | |
250 | ||
251 | probe_mask = 0; | |
252 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
253 | trigger_mask[i] = 0; | |
254 | trigger_value[i] = 0; | |
255 | } | |
256 | ||
257 | stage = -1; | |
258 | for (l = probes; l; l = l->next) { | |
259 | probe = (struct sr_probe *)l->data; | |
260 | if (probe->enabled == FALSE) | |
261 | continue; | |
262 | probe_bit = 1 << (probe->index - 1); | |
263 | probe_mask |= probe_bit; | |
264 | if (!(probe->trigger)) | |
265 | continue; | |
266 | ||
267 | stage = 0; | |
268 | for (tc = probe->trigger; *tc; tc++) { | |
269 | trigger_mask[stage] |= probe_bit; | |
270 | if (*tc == '1') | |
271 | trigger_value[stage] |= probe_bit; | |
272 | stage++; | |
273 | if (stage > NUM_TRIGGER_STAGES) | |
274 | return SR_ERR; | |
275 | } | |
276 | } | |
277 | ||
278 | if (stage == -1) | |
279 | /* | |
280 | * We didn't configure any triggers, make sure acquisition | |
281 | * doesn't wait for any. | |
282 | */ | |
283 | trigger_stage = TRIGGER_FIRED; | |
284 | else | |
285 | trigger_stage = 0; | |
286 | ||
287 | return SR_OK; | |
288 | } | |
289 | ||
290 | /* | |
291 | * API callbacks | |
292 | */ | |
293 | ||
294 | static int hw_init(const char *deviceinfo) | |
295 | { | |
296 | struct sr_device_instance *sdi; | |
297 | struct libusb_device_descriptor des; | |
298 | libusb_device **devlist; | |
299 | int err, devcnt, i; | |
300 | ||
301 | /* Avoid compiler warnings. */ | |
302 | deviceinfo = deviceinfo; | |
303 | ||
304 | if (libusb_init(&usb_context) != 0) { | |
305 | sr_warn("Failed to initialize USB."); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | /* Find all Saleae Logic devices and upload firmware to all of them. */ | |
310 | devcnt = 0; | |
311 | libusb_get_device_list(usb_context, &devlist); | |
312 | for (i = 0; devlist[i]; i++) { | |
313 | err = libusb_get_device_descriptor(devlist[i], &des); | |
314 | if (err != 0) { | |
315 | sr_warn("failed to get device descriptor: %d", err); | |
316 | continue; | |
317 | } | |
318 | ||
319 | if (des.idVendor != USB_VENDOR || des.idProduct != USB_PRODUCT) | |
320 | continue; /* Not a Saleae Logic... */ | |
321 | ||
322 | sdi = sr_device_instance_new(devcnt, SR_ST_INITIALIZING, | |
323 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
324 | if (!sdi) | |
325 | return 0; | |
326 | device_instances = g_slist_append(device_instances, sdi); | |
327 | ||
328 | if (check_conf_profile(devlist[i]) == 0) { | |
329 | /* | |
330 | * Continue on the off chance that the device is in a | |
331 | * working state. TODO: Could maybe try a USB reset, | |
332 | * or uploading the firmware again. | |
333 | */ | |
334 | if (upload_firmware(devlist[i]) > 0) | |
335 | sr_warn("firmware upload failed for device %d", | |
336 | devcnt); | |
337 | ||
338 | sdi->usb = sr_usb_device_instance_new | |
339 | (libusb_get_bus_number(devlist[i]), 0, NULL); | |
340 | } else { | |
341 | /* Already has the firmware, so fix the new address. */ | |
342 | sdi->usb = sr_usb_device_instance_new | |
343 | (libusb_get_bus_number(devlist[i]), | |
344 | libusb_get_device_address(devlist[i]), NULL); | |
345 | } | |
346 | devcnt++; | |
347 | } | |
348 | libusb_free_device_list(devlist, 1); | |
349 | ||
350 | return devcnt; | |
351 | } | |
352 | ||
353 | static int hw_opendev(int device_index) | |
354 | { | |
355 | GTimeVal cur_time; | |
356 | struct sr_device_instance *sdi; | |
357 | int timediff, err; | |
358 | unsigned int cur, upd; | |
359 | ||
360 | if (firmware_updated.tv_sec > 0) { | |
361 | /* Firmware was recently uploaded. */ | |
362 | g_get_current_time(&cur_time); | |
363 | cur = cur_time.tv_sec * 1000 + cur_time.tv_usec / 1000; | |
364 | upd = firmware_updated.tv_sec * 1000 + | |
365 | firmware_updated.tv_usec / 1000; | |
366 | timediff = cur - upd; | |
367 | if (timediff < FIRMWARE_RENUM_DELAY) { | |
368 | timediff = FIRMWARE_RENUM_DELAY - timediff; | |
369 | sr_info("saleae: waiting %d ms for device to reset", | |
370 | timediff); | |
371 | g_usleep(timediff * 1000); | |
372 | firmware_updated.tv_sec = 0; | |
373 | } | |
374 | } | |
375 | ||
376 | if (!(sdi = sl_open_device(device_index))) { | |
377 | sr_warn("unable to open device"); | |
378 | return SR_ERR; | |
379 | } | |
380 | ||
381 | err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE); | |
382 | if (err != 0) { | |
383 | sr_warn("Unable to claim interface: %d", err); | |
384 | return SR_ERR; | |
385 | } | |
386 | ||
387 | if (cur_samplerate == 0) { | |
388 | /* Samplerate hasn't been set; default to the slowest one. */ | |
389 | if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE, | |
390 | &supported_samplerates[0]) == SR_ERR) | |
391 | return SR_ERR; | |
392 | } | |
393 | ||
394 | return SR_OK; | |
395 | } | |
396 | ||
397 | static int hw_closedev(int device_index) | |
398 | { | |
399 | struct sr_device_instance *sdi; | |
400 | ||
401 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
402 | sr_err("logic: %s: sdi was NULL", __func__); | |
403 | return SR_ERR; /* TODO: SR_ERR_ARG? */ | |
404 | } | |
405 | ||
406 | /* TODO */ | |
407 | close_device(sdi); | |
408 | ||
409 | return SR_OK; | |
410 | } | |
411 | ||
412 | static void hw_cleanup(void) | |
413 | { | |
414 | GSList *l; | |
415 | ||
416 | /* Properly close all devices... */ | |
417 | for (l = device_instances; l; l = l->next) | |
418 | close_device((struct sr_device_instance *)l->data); | |
419 | ||
420 | /* ...and free all their memory. */ | |
421 | for (l = device_instances; l; l = l->next) | |
422 | g_free(l->data); | |
423 | g_slist_free(device_instances); | |
424 | device_instances = NULL; | |
425 | ||
426 | if (usb_context) | |
427 | libusb_exit(usb_context); | |
428 | usb_context = NULL; | |
429 | } | |
430 | ||
431 | static void *hw_get_device_info(int device_index, int device_info_id) | |
432 | { | |
433 | struct sr_device_instance *sdi; | |
434 | void *info = NULL; | |
435 | ||
436 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
437 | return NULL; | |
438 | ||
439 | switch (device_info_id) { | |
440 | case SR_DI_INSTANCE: | |
441 | info = sdi; | |
442 | break; | |
443 | case SR_DI_NUM_PROBES: | |
444 | info = GINT_TO_POINTER(NUM_PROBES); | |
445 | break; | |
446 | case SR_DI_SAMPLERATES: | |
447 | info = &samplerates; | |
448 | break; | |
449 | case SR_DI_TRIGGER_TYPES: | |
450 | info = TRIGGER_TYPES; | |
451 | break; | |
452 | case SR_DI_CUR_SAMPLERATE: | |
453 | info = &cur_samplerate; | |
454 | break; | |
455 | } | |
456 | ||
457 | return info; | |
458 | } | |
459 | ||
460 | static int hw_get_status(int device_index) | |
461 | { | |
462 | struct sr_device_instance *sdi; | |
463 | ||
464 | sdi = sr_get_device_instance(device_instances, device_index); | |
465 | if (sdi) | |
466 | return sdi->status; | |
467 | else | |
468 | return SR_ST_NOT_FOUND; | |
469 | } | |
470 | ||
471 | static int *hw_get_capabilities(void) | |
472 | { | |
473 | return capabilities; | |
474 | } | |
475 | ||
476 | static int set_configuration_samplerate(struct sr_device_instance *sdi, | |
477 | uint64_t samplerate) | |
478 | { | |
479 | uint8_t divider; | |
480 | int ret, result, i; | |
481 | unsigned char buf[2]; | |
482 | ||
483 | for (i = 0; supported_samplerates[i]; i++) { | |
484 | if (supported_samplerates[i] == samplerate) | |
485 | break; | |
486 | } | |
487 | if (supported_samplerates[i] == 0) | |
488 | return SR_ERR_SAMPLERATE; | |
489 | ||
490 | divider = (uint8_t) (48 / (samplerate / 1000000.0)) - 1; | |
491 | ||
492 | sr_info("saleae: setting samplerate to %" PRIu64 " Hz (divider %d)", | |
493 | samplerate, divider); | |
494 | buf[0] = 0x01; | |
495 | buf[1] = divider; | |
496 | ret = libusb_bulk_transfer(sdi->usb->devhdl, 1 | LIBUSB_ENDPOINT_OUT, | |
497 | buf, 2, &result, 500); | |
498 | if (ret != 0) { | |
499 | sr_warn("failed to set samplerate: %d", ret); | |
500 | return SR_ERR; | |
501 | } | |
502 | cur_samplerate = samplerate; | |
503 | ||
504 | return SR_OK; | |
505 | } | |
506 | ||
507 | static int hw_set_configuration(int device_index, int capability, void *value) | |
508 | { | |
509 | struct sr_device_instance *sdi; | |
510 | int ret; | |
511 | uint64_t *tmp_u64; | |
512 | ||
513 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
514 | return SR_ERR; | |
515 | ||
516 | if (capability == SR_HWCAP_SAMPLERATE) { | |
517 | tmp_u64 = value; | |
518 | ret = set_configuration_samplerate(sdi, *tmp_u64); | |
519 | } else if (capability == SR_HWCAP_PROBECONFIG) { | |
520 | ret = configure_probes((GSList *) value); | |
521 | } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { | |
522 | tmp_u64 = value; | |
523 | limit_samples = *tmp_u64; | |
524 | ret = SR_OK; | |
525 | } else { | |
526 | ret = SR_ERR; | |
527 | } | |
528 | ||
529 | return ret; | |
530 | } | |
531 | ||
532 | static int receive_data(int fd, int revents, void *user_data) | |
533 | { | |
534 | struct timeval tv; | |
535 | ||
536 | /* Avoid compiler warnings. */ | |
537 | fd = fd; | |
538 | revents = revents; | |
539 | user_data = user_data; | |
540 | ||
541 | tv.tv_sec = tv.tv_usec = 0; | |
542 | libusb_handle_events_timeout(usb_context, &tv); | |
543 | ||
544 | return TRUE; | |
545 | } | |
546 | ||
547 | void receive_transfer(struct libusb_transfer *transfer) | |
548 | { | |
549 | static int num_samples = 0; | |
550 | static int empty_transfer_count = 0; | |
551 | struct sr_datafeed_packet packet; | |
552 | void *user_data; | |
553 | int cur_buflen, trigger_offset, i; | |
554 | unsigned char *cur_buf, *new_buf; | |
555 | ||
556 | /* hw_stop_acquisition() is telling us to stop. */ | |
557 | if (transfer == NULL) | |
558 | num_samples = -1; | |
559 | ||
560 | /* | |
561 | * If acquisition has already ended, just free any queued up | |
562 | * transfer that come in. | |
563 | */ | |
564 | if (num_samples == -1) { | |
565 | if (transfer) | |
566 | libusb_free_transfer(transfer); | |
567 | return; | |
568 | } | |
569 | ||
570 | sr_info("saleae: receive_transfer(): status %d received %d bytes", | |
571 | transfer->status, transfer->actual_length); | |
572 | ||
573 | /* Save incoming transfer before reusing the transfer struct. */ | |
574 | cur_buf = transfer->buffer; | |
575 | cur_buflen = transfer->actual_length; | |
576 | user_data = transfer->user_data; | |
577 | ||
578 | /* Fire off a new request. */ | |
579 | if (!(new_buf = g_try_malloc(4096))) { | |
580 | sr_err("saleae: %s: new_buf malloc failed", __func__); | |
581 | // return SR_ERR_MALLOC; | |
582 | return; /* FIXME */ | |
583 | } | |
584 | ||
585 | transfer->buffer = new_buf; | |
586 | transfer->length = 4096; | |
587 | if (libusb_submit_transfer(transfer) != 0) { | |
588 | /* TODO: Stop session? */ | |
589 | sr_warn("eek"); | |
590 | } | |
591 | ||
592 | if (cur_buflen == 0) { | |
593 | empty_transfer_count++; | |
594 | if (empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
595 | /* | |
596 | * The FX2 gave up. End the acquisition, the frontend | |
597 | * will work out that the samplecount is short. | |
598 | */ | |
599 | hw_stop_acquisition(-1, user_data); | |
600 | } | |
601 | return; | |
602 | } else { | |
603 | empty_transfer_count = 0; | |
604 | } | |
605 | ||
606 | trigger_offset = 0; | |
607 | if (trigger_stage >= 0) { | |
608 | for (i = 0; i < cur_buflen; i++) { | |
609 | ||
610 | if ((cur_buf[i] & trigger_mask[trigger_stage]) == trigger_value[trigger_stage]) { | |
611 | /* Match on this trigger stage. */ | |
612 | trigger_buffer[trigger_stage] = cur_buf[i]; | |
613 | trigger_stage++; | |
614 | if (trigger_stage == NUM_TRIGGER_STAGES || trigger_mask[trigger_stage] == 0) { | |
615 | /* Match on all trigger stages, we're done. */ | |
616 | trigger_offset = i + 1; | |
617 | ||
618 | /* | |
619 | * TODO: Send pre-trigger buffer to session bus. | |
620 | * Tell the frontend we hit the trigger here. | |
621 | */ | |
622 | packet.type = SR_DF_TRIGGER; | |
623 | packet.length = 0; | |
624 | sr_session_bus(user_data, &packet); | |
625 | ||
626 | /* | |
627 | * Send the samples that triggered it, since we're | |
628 | * skipping past them. | |
629 | */ | |
630 | packet.type = SR_DF_LOGIC; | |
631 | packet.length = trigger_stage; | |
632 | packet.unitsize = 1; | |
633 | packet.payload = trigger_buffer; | |
634 | sr_session_bus(user_data, &packet); | |
635 | ||
636 | trigger_stage = TRIGGER_FIRED; | |
637 | break; | |
638 | } | |
639 | return; | |
640 | } | |
641 | ||
642 | /* | |
643 | * We had a match before, but not in the next sample. However, we may | |
644 | * have a match on this stage in the next bit -- trigger on 0001 will | |
645 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
646 | * the next sample from the one that matched originally, which the | |
647 | * counter increment at the end of the loop takes care of. | |
648 | */ | |
649 | if (trigger_stage > 0) { | |
650 | i -= trigger_stage; | |
651 | if (i < -1) | |
652 | i = -1; /* Oops, went back past this buffer. */ | |
653 | /* Reset trigger stage. */ | |
654 | trigger_stage = 0; | |
655 | } | |
656 | ||
657 | ||
658 | } | |
659 | } | |
660 | ||
661 | if (trigger_stage == TRIGGER_FIRED) { | |
662 | /* Send the incoming transfer to the session bus. */ | |
663 | packet.type = SR_DF_LOGIC; | |
664 | packet.length = cur_buflen - trigger_offset; | |
665 | packet.unitsize = 1; | |
666 | packet.payload = cur_buf + trigger_offset; | |
667 | sr_session_bus(user_data, &packet); | |
668 | g_free(cur_buf); | |
669 | ||
670 | num_samples += cur_buflen; | |
671 | if (limit_samples && (unsigned int) num_samples > limit_samples) { | |
672 | hw_stop_acquisition(-1, user_data); | |
673 | } | |
674 | } else { | |
675 | /* | |
676 | * TODO: Buffer pre-trigger data in capture | |
677 | * ratio-sized buffer. | |
678 | */ | |
679 | } | |
680 | } | |
681 | ||
682 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
683 | { | |
684 | struct sr_device_instance *sdi; | |
685 | struct sr_datafeed_packet *packet; | |
686 | struct sr_datafeed_header *header; | |
687 | struct libusb_transfer *transfer; | |
688 | const struct libusb_pollfd **lupfd; | |
689 | int size, i; | |
690 | unsigned char *buf; | |
691 | ||
692 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
693 | return SR_ERR; | |
694 | ||
695 | if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { | |
696 | sr_err("saleae: %s: packet malloc failed", __func__); | |
697 | return SR_ERR_MALLOC; | |
698 | } | |
699 | ||
700 | if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { | |
701 | sr_err("saleae: %s: header malloc failed", __func__); | |
702 | return SR_ERR_MALLOC; | |
703 | } | |
704 | ||
705 | /* Start with 2K transfer, subsequently increased to 4K. */ | |
706 | size = 2048; | |
707 | for (i = 0; i < NUM_SIMUL_TRANSFERS; i++) { | |
708 | if (!(buf = g_try_malloc(size))) { | |
709 | sr_err("saleae: %s: buf malloc failed", __func__); | |
710 | return SR_ERR_MALLOC; | |
711 | } | |
712 | transfer = libusb_alloc_transfer(0); | |
713 | libusb_fill_bulk_transfer(transfer, sdi->usb->devhdl, | |
714 | 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
715 | receive_transfer, session_device_id, 40); | |
716 | if (libusb_submit_transfer(transfer) != 0) { | |
717 | /* TODO: Free them all. */ | |
718 | libusb_free_transfer(transfer); | |
719 | g_free(buf); | |
720 | return SR_ERR; | |
721 | } | |
722 | size = 4096; | |
723 | } | |
724 | ||
725 | lupfd = libusb_get_pollfds(usb_context); | |
726 | for (i = 0; lupfd[i]; i++) | |
727 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, 40, receive_data, | |
728 | NULL); | |
729 | free(lupfd); | |
730 | ||
731 | packet->type = SR_DF_HEADER; | |
732 | packet->length = sizeof(struct sr_datafeed_header); | |
733 | packet->payload = (unsigned char *)header; | |
734 | header->feed_version = 1; | |
735 | gettimeofday(&header->starttime, NULL); | |
736 | header->samplerate = cur_samplerate; | |
737 | header->protocol_id = SR_PROTO_RAW; | |
738 | header->num_logic_probes = NUM_PROBES; | |
739 | header->num_analog_probes = 0; | |
740 | sr_session_bus(session_device_id, packet); | |
741 | g_free(header); | |
742 | g_free(packet); | |
743 | ||
744 | return SR_OK; | |
745 | } | |
746 | ||
747 | /* This stops acquisition on ALL devices, ignoring device_index. */ | |
748 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
749 | { | |
750 | struct sr_datafeed_packet packet; | |
751 | ||
752 | /* Avoid compiler warnings. */ | |
753 | device_index = device_index; | |
754 | ||
755 | packet.type = SR_DF_END; | |
756 | sr_session_bus(session_device_id, &packet); | |
757 | ||
758 | receive_transfer(NULL); | |
759 | ||
760 | /* TODO: Need to cancel and free any queued up transfers. */ | |
761 | } | |
762 | ||
763 | struct sr_device_plugin saleae_logic_plugin_info = { | |
764 | .name = "saleae-logic", | |
765 | .longname = "Saleae Logic", | |
766 | .api_version = 1, | |
767 | .init = hw_init, | |
768 | .cleanup = hw_cleanup, | |
769 | .opendev = hw_opendev, | |
770 | .closedev = hw_closedev, | |
771 | .get_device_info = hw_get_device_info, | |
772 | .get_status = hw_get_status, | |
773 | .get_capabilities = hw_get_capabilities, | |
774 | .set_configuration = hw_set_configuration, | |
775 | .start_acquisition = hw_start_acquisition, | |
776 | .stop_acquisition = hw_stop_acquisition, | |
777 | }; |