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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
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 <string.h> | |
23 | #include <inttypes.h> | |
24 | #include <libusb.h> | |
25 | #include "config.h" | |
26 | #include "sigrok.h" | |
27 | #include "sigrok-internal.h" | |
28 | #include "fx2lafw.h" | |
29 | #include "command.h" | |
30 | ||
31 | static const struct fx2lafw_profile supported_fx2[] = { | |
32 | /* | |
33 | * CWAV USBee AX | |
34 | * EE Electronics ESLA201A | |
35 | * ARMFLY AX-Pro | |
36 | */ | |
37 | { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL, | |
38 | FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw", 8 }, | |
39 | ||
40 | /* | |
41 | * CWAV USBee SX | |
42 | */ | |
43 | { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL, | |
44 | FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw", 8 }, | |
45 | ||
46 | /* | |
47 | * Saleae Logic | |
48 | * EE Electronics ESLA100 | |
49 | * Robomotic MiniLogic | |
50 | * Robomotic BugLogic 3 | |
51 | */ | |
52 | { 0x0925, 0x3881, "Saleae", "Logic", NULL, | |
53 | FIRMWARE_DIR "/fx2lafw-saleae-logic.fw", 8 }, | |
54 | ||
55 | /* | |
56 | * Default Cypress FX2 without EEPROM, e.g.: | |
57 | * Lcsoft Mini Board | |
58 | * Braintechnology USB Interface V2.x | |
59 | */ | |
60 | { 0x04B4, 0x8613, "Cypress", "FX2", NULL, | |
61 | FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw", 8 }, | |
62 | ||
63 | /* | |
64 | * Braintechnology USB-LPS | |
65 | */ | |
66 | { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL, | |
67 | FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw", 8 }, | |
68 | ||
69 | { 0, 0, 0, 0, 0, 0, 0 } | |
70 | }; | |
71 | ||
72 | static int hwcaps[] = { | |
73 | SR_HWCAP_LOGIC_ANALYZER, | |
74 | SR_HWCAP_SAMPLERATE, | |
75 | ||
76 | /* These are really implemented in the driver, not the hardware. */ | |
77 | SR_HWCAP_LIMIT_SAMPLES, | |
78 | SR_HWCAP_CONTINUOUS, | |
79 | 0, | |
80 | }; | |
81 | ||
82 | /* | |
83 | * TODO: Different probe_names[] for each supported device. | |
84 | */ | |
85 | static const char *probe_names[] = { | |
86 | "0", | |
87 | "1", | |
88 | "2", | |
89 | "3", | |
90 | "4", | |
91 | "5", | |
92 | "6", | |
93 | "7", | |
94 | NULL, | |
95 | }; | |
96 | ||
97 | static uint64_t supported_samplerates[] = { | |
98 | SR_KHZ(20), | |
99 | SR_KHZ(25), | |
100 | SR_KHZ(50), | |
101 | SR_KHZ(100), | |
102 | SR_KHZ(200), | |
103 | SR_KHZ(250), | |
104 | SR_KHZ(500), | |
105 | SR_MHZ(1), | |
106 | SR_MHZ(2), | |
107 | SR_MHZ(3), | |
108 | SR_MHZ(4), | |
109 | SR_MHZ(6), | |
110 | SR_MHZ(8), | |
111 | SR_MHZ(12), | |
112 | SR_MHZ(16), | |
113 | SR_MHZ(24), | |
114 | 0, | |
115 | }; | |
116 | ||
117 | static struct sr_samplerates samplerates = { | |
118 | 0, | |
119 | 0, | |
120 | 0, | |
121 | supported_samplerates, | |
122 | }; | |
123 | ||
124 | static GSList *dev_insts = NULL; | |
125 | static libusb_context *usb_context = NULL; | |
126 | ||
127 | static int hw_dev_config_set(int dev_index, int hwcap, void *value); | |
128 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data); | |
129 | ||
130 | /** | |
131 | * Check the USB configuration to determine if this is an fx2lafw device. | |
132 | * | |
133 | * @return TRUE if the device's configuration profile match fx2lafw | |
134 | * configuration, FALSE otherwise. | |
135 | */ | |
136 | static gboolean check_conf_profile(libusb_device *dev) | |
137 | { | |
138 | struct libusb_device_descriptor des; | |
139 | struct libusb_device_handle *hdl; | |
140 | gboolean ret; | |
141 | unsigned char strdesc[64]; | |
142 | ||
143 | hdl = NULL; | |
144 | ret = FALSE; | |
145 | while (!ret) { | |
146 | /* Assume the FW has not been loaded, unless proven wrong. */ | |
147 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
148 | break; | |
149 | ||
150 | if (libusb_open(dev, &hdl) != 0) | |
151 | break; | |
152 | ||
153 | if (libusb_get_string_descriptor_ascii(hdl, | |
154 | des.iManufacturer, strdesc, sizeof(strdesc)) < 0) | |
155 | break; | |
156 | if (strncmp((const char *)strdesc, "sigrok", 6)) | |
157 | break; | |
158 | ||
159 | if (libusb_get_string_descriptor_ascii(hdl, | |
160 | des.iProduct, strdesc, sizeof(strdesc)) < 0) | |
161 | break; | |
162 | if (strncmp((const char *)strdesc, "fx2lafw", 7)) | |
163 | break; | |
164 | ||
165 | /* If we made it here, it must be an fx2lafw. */ | |
166 | ret = TRUE; | |
167 | } | |
168 | if (hdl) | |
169 | libusb_close(hdl); | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static int fx2lafw_dev_open(int dev_index) | |
175 | { | |
176 | libusb_device **devlist; | |
177 | struct libusb_device_descriptor des; | |
178 | struct sr_dev_inst *sdi; | |
179 | struct context *ctx; | |
180 | struct version_info vi; | |
181 | int ret, skip, i; | |
182 | uint8_t revid; | |
183 | ||
184 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
185 | return SR_ERR; | |
186 | ctx = sdi->priv; | |
187 | ||
188 | if (sdi->status == SR_ST_ACTIVE) | |
189 | /* already in use */ | |
190 | return SR_ERR; | |
191 | ||
192 | skip = 0; | |
193 | const int device_count = libusb_get_device_list(usb_context, &devlist); | |
194 | if (device_count < 0) { | |
195 | sr_err("fx2lafw: Failed to retrieve device list (%d)", | |
196 | device_count); | |
197 | return SR_ERR; | |
198 | } | |
199 | ||
200 | for (i = 0; i < device_count; i++) { | |
201 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
202 | sr_err("fx2lafw: Failed to get device descriptor: %d.", | |
203 | ret); | |
204 | continue; | |
205 | } | |
206 | ||
207 | if (des.idVendor != ctx->profile->vid | |
208 | || des.idProduct != ctx->profile->pid) | |
209 | continue; | |
210 | ||
211 | if (sdi->status == SR_ST_INITIALIZING) { | |
212 | if (skip != dev_index) { | |
213 | /* Skip devices of this type that aren't the one we want. */ | |
214 | skip += 1; | |
215 | continue; | |
216 | } | |
217 | } else if (sdi->status == SR_ST_INACTIVE) { | |
218 | /* | |
219 | * This device is fully enumerated, so we need to find | |
220 | * this device by vendor, product, bus and address. | |
221 | */ | |
222 | if (libusb_get_bus_number(devlist[i]) != ctx->usb->bus | |
223 | || libusb_get_device_address(devlist[i]) != ctx->usb->address) | |
224 | /* this is not the one */ | |
225 | continue; | |
226 | } | |
227 | ||
228 | if (!(ret = libusb_open(devlist[i], &ctx->usb->devhdl))) { | |
229 | if (ctx->usb->address == 0xff) | |
230 | /* | |
231 | * first time we touch this device after firmware upload, | |
232 | * so we don't know the address yet. | |
233 | */ | |
234 | ctx->usb->address = libusb_get_device_address(devlist[i]); | |
235 | } else { | |
236 | sr_err("fx2lafw: Failed to open device: %d.", ret); | |
237 | break; | |
238 | } | |
239 | ||
240 | ret = command_get_fw_version(ctx->usb->devhdl, &vi); | |
241 | if (ret != SR_OK) { | |
242 | sr_err("fx2lafw: Failed to retrieve " | |
243 | "firmware version information."); | |
244 | break; | |
245 | } | |
246 | ||
247 | ret = command_get_revid_version(ctx->usb->devhdl, &revid); | |
248 | if (ret != SR_OK) { | |
249 | sr_err("fx2lafw: Failed to retrieve REVID."); | |
250 | break; | |
251 | } | |
252 | ||
253 | if (vi.major != FX2LAFW_VERSION_MAJOR || | |
254 | vi.minor != FX2LAFW_VERSION_MINOR) { | |
255 | sr_err("fx2lafw: Expected firmware version %d.%d " | |
256 | "got %d.%d.", FX2LAFW_VERSION_MAJOR, | |
257 | FX2LAFW_VERSION_MINOR, vi.major, vi.minor); | |
258 | break; | |
259 | } | |
260 | ||
261 | sdi->status = SR_ST_ACTIVE; | |
262 | sr_info("fx2lafw: Opened device %d on %d.%d " | |
263 | "interface %d, firmware %d.%d, REVID %d.", | |
264 | sdi->index, ctx->usb->bus, ctx->usb->address, | |
265 | USB_INTERFACE, vi.major, vi.minor, revid); | |
266 | ||
267 | break; | |
268 | } | |
269 | libusb_free_device_list(devlist, 1); | |
270 | ||
271 | if (sdi->status != SR_ST_ACTIVE) | |
272 | return SR_ERR; | |
273 | ||
274 | return SR_OK; | |
275 | } | |
276 | ||
277 | static void close_dev(struct sr_dev_inst *sdi) | |
278 | { | |
279 | struct context *ctx; | |
280 | ||
281 | ctx = sdi->priv; | |
282 | ||
283 | if (ctx->usb->devhdl == NULL) | |
284 | return; | |
285 | ||
286 | sr_info("fx2lafw: Closing device %d on %d.%d interface %d.", | |
287 | sdi->index, ctx->usb->bus, ctx->usb->address, USB_INTERFACE); | |
288 | libusb_release_interface(ctx->usb->devhdl, USB_INTERFACE); | |
289 | libusb_close(ctx->usb->devhdl); | |
290 | ctx->usb->devhdl = NULL; | |
291 | sdi->status = SR_ST_INACTIVE; | |
292 | } | |
293 | ||
294 | static int configure_probes(struct context *ctx, GSList *probes) | |
295 | { | |
296 | struct sr_probe *probe; | |
297 | GSList *l; | |
298 | int probe_bit, stage, i; | |
299 | char *tc; | |
300 | ||
301 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
302 | ctx->trigger_mask[i] = 0; | |
303 | ctx->trigger_value[i] = 0; | |
304 | } | |
305 | ||
306 | stage = -1; | |
307 | for (l = probes; l; l = l->next) { | |
308 | probe = (struct sr_probe *)l->data; | |
309 | if (probe->enabled == FALSE) | |
310 | continue; | |
311 | probe_bit = 1 << (probe->index - 1); | |
312 | if (!(probe->trigger)) | |
313 | continue; | |
314 | ||
315 | stage = 0; | |
316 | for (tc = probe->trigger; *tc; tc++) { | |
317 | ctx->trigger_mask[stage] |= probe_bit; | |
318 | if (*tc == '1') | |
319 | ctx->trigger_value[stage] |= probe_bit; | |
320 | stage++; | |
321 | if (stage > NUM_TRIGGER_STAGES) | |
322 | return SR_ERR; | |
323 | } | |
324 | } | |
325 | ||
326 | if (stage == -1) | |
327 | /* | |
328 | * We didn't configure any triggers, make sure acquisition | |
329 | * doesn't wait for any. | |
330 | */ | |
331 | ctx->trigger_stage = TRIGGER_FIRED; | |
332 | else | |
333 | ctx->trigger_stage = 0; | |
334 | ||
335 | return SR_OK; | |
336 | } | |
337 | ||
338 | static struct context *fx2lafw_dev_new(void) | |
339 | { | |
340 | struct context *ctx; | |
341 | ||
342 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
343 | sr_err("fx2lafw: %s: ctx malloc failed.", __func__); | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | ctx->trigger_stage = TRIGGER_FIRED; | |
348 | ||
349 | return ctx; | |
350 | } | |
351 | ||
352 | /* | |
353 | * API callbacks | |
354 | */ | |
355 | ||
356 | static int hw_init(const char *devinfo) | |
357 | { | |
358 | struct sr_dev_inst *sdi; | |
359 | struct libusb_device_descriptor des; | |
360 | const struct fx2lafw_profile *prof; | |
361 | struct context *ctx; | |
362 | libusb_device **devlist; | |
363 | int ret; | |
364 | int devcnt = 0; | |
365 | int i, j; | |
366 | ||
367 | /* Avoid compiler warnings. */ | |
368 | (void)devinfo; | |
369 | ||
370 | if (libusb_init(&usb_context) != 0) { | |
371 | sr_warn("fx2lafw: Failed to initialize libusb."); | |
372 | return 0; | |
373 | } | |
374 | ||
375 | /* Find all fx2lafw compatible devices and upload firware to them. */ | |
376 | libusb_get_device_list(usb_context, &devlist); | |
377 | for (i = 0; devlist[i]; i++) { | |
378 | ||
379 | if ((ret = libusb_get_device_descriptor( | |
380 | devlist[i], &des)) != 0) { | |
381 | sr_warn("fx2lafw: Failed to get device descriptor: %d.", ret); | |
382 | continue; | |
383 | } | |
384 | ||
385 | prof = NULL; | |
386 | for (j = 0; supported_fx2[j].vid; j++) { | |
387 | if (des.idVendor == supported_fx2[j].vid && | |
388 | des.idProduct == supported_fx2[j].pid) { | |
389 | prof = &supported_fx2[j]; | |
390 | } | |
391 | } | |
392 | ||
393 | /* Skip if the device was not found */ | |
394 | if (!prof) | |
395 | continue; | |
396 | ||
397 | sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING, | |
398 | prof->vendor, prof->model, prof->model_version); | |
399 | if (!sdi) | |
400 | return 0; | |
401 | ||
402 | ctx = fx2lafw_dev_new(); | |
403 | ctx->profile = prof; | |
404 | sdi->priv = ctx; | |
405 | dev_insts = g_slist_append(dev_insts, sdi); | |
406 | ||
407 | if (check_conf_profile(devlist[i])) { | |
408 | /* Already has the firmware, so fix the new address. */ | |
409 | sr_dbg("fx2lafw: Found an fx2lafw device."); | |
410 | sdi->status = SR_ST_INACTIVE; | |
411 | ctx->usb = sr_usb_dev_inst_new | |
412 | (libusb_get_bus_number(devlist[i]), | |
413 | libusb_get_device_address(devlist[i]), NULL); | |
414 | } else { | |
415 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
416 | prof->firmware) == SR_OK) | |
417 | /* Remember when the firmware on this device was updated */ | |
418 | ctx->fw_updated = g_get_monotonic_time(); | |
419 | else | |
420 | sr_err("fx2lafw: Firmware upload failed for " | |
421 | "device %d.", devcnt); | |
422 | ctx->usb = sr_usb_dev_inst_new | |
423 | (libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
424 | } | |
425 | ||
426 | devcnt++; | |
427 | } | |
428 | libusb_free_device_list(devlist, 1); | |
429 | ||
430 | return devcnt; | |
431 | } | |
432 | ||
433 | static int hw_dev_open(int dev_index) | |
434 | { | |
435 | struct sr_dev_inst *sdi; | |
436 | struct context *ctx; | |
437 | int ret; | |
438 | int64_t timediff_us, timediff_ms; | |
439 | ||
440 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
441 | return SR_ERR; | |
442 | ctx = sdi->priv; | |
443 | ||
444 | /* | |
445 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms | |
446 | * for the FX2 to renumerate. | |
447 | */ | |
448 | ret = 0; | |
449 | ||
450 | if (ctx->fw_updated > 0) { | |
451 | sr_info("fx2lafw: Waiting for device to reset."); | |
452 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
453 | g_usleep(300 * 1000); | |
454 | timediff_ms = 0; | |
455 | while (timediff_ms < MAX_RENUM_DELAY) { | |
456 | if ((ret = fx2lafw_dev_open(dev_index)) == SR_OK) | |
457 | break; | |
458 | g_usleep(100 * 1000); | |
459 | ||
460 | timediff_us = g_get_monotonic_time() - ctx->fw_updated; | |
461 | timediff_ms = timediff_us / G_USEC_PER_SEC; | |
462 | sr_spew("fx2lafw: timediff: %" PRIi64 " us.", | |
463 | timediff_us); | |
464 | } | |
465 | sr_info("fx2lafw: Device came back after %d ms.", timediff_ms); | |
466 | } else { | |
467 | ret = fx2lafw_dev_open(dev_index); | |
468 | } | |
469 | ||
470 | if (ret != SR_OK) { | |
471 | sr_err("fx2lafw: Unable to open device."); | |
472 | return SR_ERR; | |
473 | } | |
474 | ctx = sdi->priv; | |
475 | ||
476 | ret = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
477 | if (ret != 0) { | |
478 | sr_err("fx2lafw: Unable to claim interface: %d.", ret); | |
479 | return SR_ERR; | |
480 | } | |
481 | ||
482 | if (ctx->cur_samplerate == 0) { | |
483 | /* Samplerate hasn't been set; default to the slowest one. */ | |
484 | if (hw_dev_config_set(dev_index, SR_HWCAP_SAMPLERATE, | |
485 | &supported_samplerates[0]) == SR_ERR) | |
486 | return SR_ERR; | |
487 | } | |
488 | ||
489 | return SR_OK; | |
490 | } | |
491 | ||
492 | static int hw_dev_close(int dev_index) | |
493 | { | |
494 | struct sr_dev_inst *sdi; | |
495 | ||
496 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
497 | sr_err("fx2lafw: %s: sdi was NULL.", __func__); | |
498 | return SR_ERR_BUG; | |
499 | } | |
500 | ||
501 | /* TODO */ | |
502 | close_dev(sdi); | |
503 | ||
504 | return SR_OK; | |
505 | } | |
506 | ||
507 | static int hw_cleanup(void) | |
508 | { | |
509 | GSList *l; | |
510 | struct sr_dev_inst *sdi; | |
511 | struct context *ctx; | |
512 | int ret = SR_OK; | |
513 | ||
514 | for (l = dev_insts; l; l = l->next) { | |
515 | if (!(sdi = l->data)) { | |
516 | /* Log error, but continue cleaning up the rest. */ | |
517 | sr_err("fx2lafw: %s: sdi was NULL, continuing.", | |
518 | __func__); | |
519 | ret = SR_ERR_BUG; | |
520 | continue; | |
521 | } | |
522 | if (!(ctx = sdi->priv)) { | |
523 | /* Log error, but continue cleaning up the rest. */ | |
524 | sr_err("fx2lafw: %s: sdi->priv was NULL, continuing", | |
525 | __func__); | |
526 | ret = SR_ERR_BUG; | |
527 | continue; | |
528 | } | |
529 | close_dev(sdi); | |
530 | sdi = l->data; | |
531 | sr_dev_inst_free(sdi); | |
532 | } | |
533 | ||
534 | g_slist_free(dev_insts); | |
535 | dev_insts = NULL; | |
536 | ||
537 | if (usb_context) | |
538 | libusb_exit(usb_context); | |
539 | usb_context = NULL; | |
540 | ||
541 | return ret; | |
542 | } | |
543 | ||
544 | static void *hw_dev_info_get(int dev_index, int dev_info_id) | |
545 | { | |
546 | struct sr_dev_inst *sdi; | |
547 | struct context *ctx; | |
548 | ||
549 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
550 | return NULL; | |
551 | ctx = sdi->priv; | |
552 | ||
553 | switch (dev_info_id) { | |
554 | case SR_DI_INST: | |
555 | return sdi; | |
556 | case SR_DI_NUM_PROBES: | |
557 | return GINT_TO_POINTER(ctx->profile->num_probes); | |
558 | case SR_DI_PROBE_NAMES: | |
559 | return probe_names; | |
560 | case SR_DI_SAMPLERATES: | |
561 | return &samplerates; | |
562 | case SR_DI_TRIGGER_TYPES: | |
563 | return TRIGGER_TYPES; | |
564 | case SR_DI_CUR_SAMPLERATE: | |
565 | return &ctx->cur_samplerate; | |
566 | } | |
567 | ||
568 | return NULL; | |
569 | } | |
570 | ||
571 | static int hw_dev_status_get(int dev_index) | |
572 | { | |
573 | const struct sr_dev_inst *const sdi = | |
574 | sr_dev_inst_get(dev_insts, dev_index); | |
575 | ||
576 | if (!sdi) | |
577 | return SR_ST_NOT_FOUND; | |
578 | ||
579 | return sdi->status; | |
580 | } | |
581 | ||
582 | static int *hw_hwcap_get_all(void) | |
583 | { | |
584 | return hwcaps; | |
585 | } | |
586 | ||
587 | static int hw_dev_config_set(int dev_index, int hwcap, void *value) | |
588 | { | |
589 | struct sr_dev_inst *sdi; | |
590 | struct context *ctx; | |
591 | int ret; | |
592 | ||
593 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
594 | return SR_ERR; | |
595 | ctx = sdi->priv; | |
596 | ||
597 | if (hwcap == SR_HWCAP_SAMPLERATE) { | |
598 | ctx->cur_samplerate = *(uint64_t *)value; | |
599 | ret = SR_OK; | |
600 | } else if (hwcap == SR_HWCAP_PROBECONFIG) { | |
601 | ret = configure_probes(ctx, (GSList *) value); | |
602 | } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) { | |
603 | ctx->limit_samples = *(uint64_t *)value; | |
604 | ret = SR_OK; | |
605 | } else { | |
606 | ret = SR_ERR; | |
607 | } | |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
612 | static int receive_data(int fd, int revents, void *cb_data) | |
613 | { | |
614 | struct timeval tv; | |
615 | ||
616 | /* Avoid compiler warnings. */ | |
617 | (void)fd; | |
618 | (void)revents; | |
619 | (void)cb_data; | |
620 | ||
621 | tv.tv_sec = tv.tv_usec = 0; | |
622 | libusb_handle_events_timeout(usb_context, &tv); | |
623 | ||
624 | return TRUE; | |
625 | } | |
626 | ||
627 | static void abort_acquisition(struct context *ctx) | |
628 | { | |
629 | ctx->num_samples = -1; | |
630 | } | |
631 | ||
632 | static void finish_acquisition(struct context *ctx) | |
633 | { | |
634 | struct sr_datafeed_packet packet; | |
635 | int i; | |
636 | ||
637 | /* Terminate session */ | |
638 | packet.type = SR_DF_END; | |
639 | sr_session_send(ctx->session_dev_id, &packet); | |
640 | ||
641 | /* Remove fds from polling */ | |
642 | const struct libusb_pollfd **const lupfd = | |
643 | libusb_get_pollfds(usb_context); | |
644 | for (i = 0; lupfd[i]; i++) | |
645 | sr_source_remove(lupfd[i]->fd); | |
646 | free(lupfd); /* NOT g_free()! */ | |
647 | } | |
648 | ||
649 | static void receive_transfer(struct libusb_transfer *transfer) | |
650 | { | |
651 | /* TODO: These statics have to move to the ctx struct. */ | |
652 | static int empty_transfer_count = 0; | |
653 | struct sr_datafeed_packet packet; | |
654 | struct sr_datafeed_logic logic; | |
655 | struct context *ctx = transfer->user_data; | |
656 | int cur_buflen, trigger_offset, i; | |
657 | unsigned char *cur_buf, *new_buf; | |
658 | ||
659 | /* | |
660 | * If acquisition has already ended, just free any queued up | |
661 | * transfer that come in. | |
662 | */ | |
663 | if (ctx->num_samples == -1) { | |
664 | if (transfer) | |
665 | libusb_free_transfer(transfer); | |
666 | ||
667 | ctx->submitted_transfers--; | |
668 | if (ctx->submitted_transfers == 0) | |
669 | finish_acquisition(ctx); | |
670 | ||
671 | return; | |
672 | } | |
673 | ||
674 | sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.", | |
675 | transfer->status, transfer->actual_length); | |
676 | ||
677 | /* Save incoming transfer before reusing the transfer struct. */ | |
678 | cur_buf = transfer->buffer; | |
679 | cur_buflen = transfer->actual_length; | |
680 | ||
681 | /* Fire off a new request. */ | |
682 | if (!(new_buf = g_try_malloc(4096))) { | |
683 | sr_err("fx2lafw: %s: new_buf malloc failed.", __func__); | |
684 | return; /* TODO: SR_ERR_MALLOC */ | |
685 | } | |
686 | ||
687 | transfer->buffer = new_buf; | |
688 | transfer->length = 4096; | |
689 | if (libusb_submit_transfer(transfer) != 0) { | |
690 | /* TODO: Stop session? */ | |
691 | /* TODO: Better error message. */ | |
692 | sr_err("fx2lafw: %s: libusb_submit_transfer error.", __func__); | |
693 | } | |
694 | ||
695 | if (cur_buflen == 0) { | |
696 | empty_transfer_count++; | |
697 | if (empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
698 | /* | |
699 | * The FX2 gave up. End the acquisition, the frontend | |
700 | * will work out that the samplecount is short. | |
701 | */ | |
702 | abort_acquisition(ctx); | |
703 | } | |
704 | return; | |
705 | } else { | |
706 | empty_transfer_count = 0; | |
707 | } | |
708 | ||
709 | trigger_offset = 0; | |
710 | if (ctx->trigger_stage >= 0) { | |
711 | for (i = 0; i < cur_buflen; i++) { | |
712 | ||
713 | if ((cur_buf[i] & ctx->trigger_mask[ctx->trigger_stage]) == ctx->trigger_value[ctx->trigger_stage]) { | |
714 | /* Match on this trigger stage. */ | |
715 | ctx->trigger_buffer[ctx->trigger_stage] = cur_buf[i]; | |
716 | ctx->trigger_stage++; | |
717 | ||
718 | if (ctx->trigger_stage == NUM_TRIGGER_STAGES || ctx->trigger_mask[ctx->trigger_stage] == 0) { | |
719 | /* Match on all trigger stages, we're done. */ | |
720 | trigger_offset = i + 1; | |
721 | ||
722 | /* | |
723 | * TODO: Send pre-trigger buffer to session bus. | |
724 | * Tell the frontend we hit the trigger here. | |
725 | */ | |
726 | packet.type = SR_DF_TRIGGER; | |
727 | packet.payload = NULL; | |
728 | sr_session_send(ctx->session_dev_id, &packet); | |
729 | ||
730 | /* | |
731 | * Send the samples that triggered it, since we're | |
732 | * skipping past them. | |
733 | */ | |
734 | packet.type = SR_DF_LOGIC; | |
735 | packet.payload = &logic; | |
736 | logic.length = ctx->trigger_stage; | |
737 | logic.unitsize = 1; | |
738 | logic.data = ctx->trigger_buffer; | |
739 | sr_session_send(ctx->session_dev_id, &packet); | |
740 | ||
741 | ctx->trigger_stage = TRIGGER_FIRED; | |
742 | break; | |
743 | } | |
744 | return; | |
745 | } | |
746 | ||
747 | /* | |
748 | * We had a match before, but not in the next sample. However, we may | |
749 | * have a match on this stage in the next bit -- trigger on 0001 will | |
750 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
751 | * the next sample from the one that matched originally, which the | |
752 | * counter increment at the end of the loop takes care of. | |
753 | */ | |
754 | if (ctx->trigger_stage > 0) { | |
755 | i -= ctx->trigger_stage; | |
756 | if (i < -1) | |
757 | i = -1; /* Oops, went back past this buffer. */ | |
758 | /* Reset trigger stage. */ | |
759 | ctx->trigger_stage = 0; | |
760 | } | |
761 | } | |
762 | } | |
763 | ||
764 | if (ctx->trigger_stage == TRIGGER_FIRED) { | |
765 | /* Send the incoming transfer to the session bus. */ | |
766 | packet.type = SR_DF_LOGIC; | |
767 | packet.payload = &logic; | |
768 | logic.length = cur_buflen - trigger_offset; | |
769 | logic.unitsize = 1; | |
770 | logic.data = cur_buf + trigger_offset; | |
771 | sr_session_send(ctx->session_dev_id, &packet); | |
772 | g_free(cur_buf); | |
773 | ||
774 | ctx->num_samples += cur_buflen; | |
775 | if (ctx->limit_samples && | |
776 | (unsigned int)ctx->num_samples > ctx->limit_samples) { | |
777 | abort_acquisition(ctx); | |
778 | } | |
779 | } else { | |
780 | /* | |
781 | * TODO: Buffer pre-trigger data in capture | |
782 | * ratio-sized buffer. | |
783 | */ | |
784 | } | |
785 | } | |
786 | ||
787 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
788 | { | |
789 | struct sr_dev_inst *sdi; | |
790 | struct sr_datafeed_packet *packet; | |
791 | struct sr_datafeed_header *header; | |
792 | struct context *ctx; | |
793 | struct libusb_transfer *transfer; | |
794 | const struct libusb_pollfd **lupfd; | |
795 | int ret, size, i; | |
796 | unsigned char *buf; | |
797 | ||
798 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
799 | return SR_ERR; | |
800 | ctx = sdi->priv; | |
801 | ctx->session_dev_id = cb_data; | |
802 | ctx->num_samples = 0; | |
803 | ||
804 | if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { | |
805 | sr_err("fx2lafw: %s: packet malloc failed.", __func__); | |
806 | return SR_ERR_MALLOC; | |
807 | } | |
808 | ||
809 | if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { | |
810 | sr_err("fx2lafw: %s: header malloc failed.", __func__); | |
811 | return SR_ERR_MALLOC; | |
812 | } | |
813 | ||
814 | /* Start with 2K transfer, subsequently increased to 4K. */ | |
815 | size = 2048; | |
816 | for (i = 0; i < NUM_SIMUL_TRANSFERS; i++) { | |
817 | if (!(buf = g_try_malloc(size))) { | |
818 | sr_err("fx2lafw: %s: buf malloc failed.", __func__); | |
819 | return SR_ERR_MALLOC; | |
820 | } | |
821 | transfer = libusb_alloc_transfer(0); | |
822 | libusb_fill_bulk_transfer(transfer, ctx->usb->devhdl, | |
823 | 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
824 | receive_transfer, ctx, 40); | |
825 | if (libusb_submit_transfer(transfer) != 0) { | |
826 | /* TODO: Free them all. */ | |
827 | libusb_free_transfer(transfer); | |
828 | g_free(buf); | |
829 | return SR_ERR; | |
830 | } | |
831 | ||
832 | ctx->submitted_transfers++; | |
833 | size = 4096; | |
834 | } | |
835 | ||
836 | lupfd = libusb_get_pollfds(usb_context); | |
837 | for (i = 0; lupfd[i]; i++) | |
838 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, | |
839 | 40, receive_data, NULL); | |
840 | free(lupfd); /* NOT g_free()! */ | |
841 | ||
842 | packet->type = SR_DF_HEADER; | |
843 | packet->payload = header; | |
844 | header->feed_version = 1; | |
845 | gettimeofday(&header->starttime, NULL); | |
846 | header->samplerate = ctx->cur_samplerate; | |
847 | header->num_logic_probes = ctx->profile->num_probes; | |
848 | sr_session_send(cb_data, packet); | |
849 | g_free(header); | |
850 | g_free(packet); | |
851 | ||
852 | if ((ret = command_start_acquisition (ctx->usb->devhdl, | |
853 | ctx->cur_samplerate)) != SR_OK) { | |
854 | return ret; | |
855 | } | |
856 | ||
857 | return SR_OK; | |
858 | } | |
859 | ||
860 | /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */ | |
861 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
862 | { | |
863 | struct sr_dev_inst *sdi; | |
864 | ||
865 | /* Avoid compiler warnings. */ | |
866 | (void)cb_data; | |
867 | ||
868 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
869 | return SR_ERR; | |
870 | ||
871 | abort_acquisition(sdi->priv); | |
872 | ||
873 | return SR_OK; | |
874 | } | |
875 | ||
876 | SR_PRIV struct sr_dev_driver fx2lafw_driver_info = { | |
877 | .name = "fx2lafw", | |
878 | .longname = "fx2lafw (generic driver for FX2 based LAs)", | |
879 | .api_version = 1, | |
880 | .init = hw_init, | |
881 | .cleanup = hw_cleanup, | |
882 | .dev_open = hw_dev_open, | |
883 | .dev_close = hw_dev_close, | |
884 | .dev_info_get = hw_dev_info_get, | |
885 | .dev_status_get = hw_dev_status_get, | |
886 | .hwcap_get_all = hw_hwcap_get_all, | |
887 | .dev_config_set = hw_dev_config_set, | |
888 | .dev_acquisition_start = hw_dev_acquisition_start, | |
889 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
890 | }; |