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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <inttypes.h> | |
25 | #include <libusb.h> | |
26 | #include "config.h" | |
27 | #include "libsigrok.h" | |
28 | #include "libsigrok-internal.h" | |
29 | #include "fx2lafw.h" | |
30 | #include "command.h" | |
31 | ||
32 | static const struct fx2lafw_profile supported_fx2[] = { | |
33 | /* | |
34 | * CWAV USBee AX | |
35 | * EE Electronics ESLA201A | |
36 | * ARMFLY AX-Pro | |
37 | */ | |
38 | { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL, | |
39 | FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw", | |
40 | 0 }, | |
41 | ||
42 | /* | |
43 | * CWAV USBee SX | |
44 | */ | |
45 | { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL, | |
46 | FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw", | |
47 | 0 }, | |
48 | ||
49 | /* | |
50 | * Saleae Logic | |
51 | * EE Electronics ESLA100 | |
52 | * Robomotic MiniLogic | |
53 | * Robomotic BugLogic 3 | |
54 | */ | |
55 | { 0x0925, 0x3881, "Saleae", "Logic", NULL, | |
56 | FIRMWARE_DIR "/fx2lafw-saleae-logic.fw", | |
57 | 0 }, | |
58 | ||
59 | /* | |
60 | * Default Cypress FX2 without EEPROM, e.g.: | |
61 | * Lcsoft Mini Board | |
62 | * Braintechnology USB Interface V2.x | |
63 | */ | |
64 | { 0x04B4, 0x8613, "Cypress", "FX2", NULL, | |
65 | FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw", | |
66 | DEV_CAPS_16BIT }, | |
67 | ||
68 | /* | |
69 | * Braintechnology USB-LPS | |
70 | */ | |
71 | { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL, | |
72 | FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw", | |
73 | DEV_CAPS_16BIT }, | |
74 | ||
75 | { 0, 0, 0, 0, 0, 0, 0 } | |
76 | }; | |
77 | ||
78 | static const int hwcaps[] = { | |
79 | SR_HWCAP_LOGIC_ANALYZER, | |
80 | SR_HWCAP_SAMPLERATE, | |
81 | ||
82 | /* These are really implemented in the driver, not the hardware. */ | |
83 | SR_HWCAP_LIMIT_SAMPLES, | |
84 | SR_HWCAP_CONTINUOUS, | |
85 | 0, | |
86 | }; | |
87 | ||
88 | /* | |
89 | * TODO: Different probe_names[] for each supported device. | |
90 | */ | |
91 | static const char *probe_names[] = { | |
92 | "0", | |
93 | "1", | |
94 | "2", | |
95 | "3", | |
96 | "4", | |
97 | "5", | |
98 | "6", | |
99 | "7", | |
100 | "8", | |
101 | "9", | |
102 | "10", | |
103 | "11", | |
104 | "12", | |
105 | "13", | |
106 | "14", | |
107 | "15", | |
108 | NULL, | |
109 | }; | |
110 | ||
111 | static const uint64_t supported_samplerates[] = { | |
112 | SR_KHZ(20), | |
113 | SR_KHZ(25), | |
114 | SR_KHZ(50), | |
115 | SR_KHZ(100), | |
116 | SR_KHZ(200), | |
117 | SR_KHZ(250), | |
118 | SR_KHZ(500), | |
119 | SR_MHZ(1), | |
120 | SR_MHZ(2), | |
121 | SR_MHZ(3), | |
122 | SR_MHZ(4), | |
123 | SR_MHZ(6), | |
124 | SR_MHZ(8), | |
125 | SR_MHZ(12), | |
126 | SR_MHZ(16), | |
127 | SR_MHZ(24), | |
128 | 0, | |
129 | }; | |
130 | ||
131 | static const struct sr_samplerates samplerates = { | |
132 | 0, | |
133 | 0, | |
134 | 0, | |
135 | supported_samplerates, | |
136 | }; | |
137 | ||
138 | static GSList *dev_insts = NULL; | |
139 | static libusb_context *usb_context = NULL; | |
140 | ||
141 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value); | |
142 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data); | |
143 | ||
144 | /** | |
145 | * Check the USB configuration to determine if this is an fx2lafw device. | |
146 | * | |
147 | * @return TRUE if the device's configuration profile match fx2lafw | |
148 | * configuration, FALSE otherwise. | |
149 | */ | |
150 | static gboolean check_conf_profile(libusb_device *dev) | |
151 | { | |
152 | struct libusb_device_descriptor des; | |
153 | struct libusb_device_handle *hdl; | |
154 | gboolean ret; | |
155 | unsigned char strdesc[64]; | |
156 | ||
157 | hdl = NULL; | |
158 | ret = FALSE; | |
159 | while (!ret) { | |
160 | /* Assume the FW has not been loaded, unless proven wrong. */ | |
161 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
162 | break; | |
163 | ||
164 | if (libusb_open(dev, &hdl) != 0) | |
165 | break; | |
166 | ||
167 | if (libusb_get_string_descriptor_ascii(hdl, | |
168 | des.iManufacturer, strdesc, sizeof(strdesc)) < 0) | |
169 | break; | |
170 | if (strncmp((const char *)strdesc, "sigrok", 6)) | |
171 | break; | |
172 | ||
173 | if (libusb_get_string_descriptor_ascii(hdl, | |
174 | des.iProduct, strdesc, sizeof(strdesc)) < 0) | |
175 | break; | |
176 | if (strncmp((const char *)strdesc, "fx2lafw", 7)) | |
177 | break; | |
178 | ||
179 | /* If we made it here, it must be an fx2lafw. */ | |
180 | ret = TRUE; | |
181 | } | |
182 | if (hdl) | |
183 | libusb_close(hdl); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | static int fx2lafw_dev_open(int dev_index) | |
189 | { | |
190 | libusb_device **devlist; | |
191 | struct libusb_device_descriptor des; | |
192 | struct sr_dev_inst *sdi; | |
193 | struct context *ctx; | |
194 | struct version_info vi; | |
195 | int ret, skip, i; | |
196 | uint8_t revid; | |
197 | ||
198 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
199 | return SR_ERR; | |
200 | ctx = sdi->priv; | |
201 | ||
202 | if (sdi->status == SR_ST_ACTIVE) | |
203 | /* already in use */ | |
204 | return SR_ERR; | |
205 | ||
206 | skip = 0; | |
207 | const int device_count = libusb_get_device_list(usb_context, &devlist); | |
208 | if (device_count < 0) { | |
209 | sr_err("fx2lafw: Failed to retrieve device list (%d)", | |
210 | device_count); | |
211 | return SR_ERR; | |
212 | } | |
213 | ||
214 | for (i = 0; i < device_count; i++) { | |
215 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
216 | sr_err("fx2lafw: Failed to get device descriptor: %d.", | |
217 | ret); | |
218 | continue; | |
219 | } | |
220 | ||
221 | if (des.idVendor != ctx->profile->vid | |
222 | || des.idProduct != ctx->profile->pid) | |
223 | continue; | |
224 | ||
225 | if (sdi->status == SR_ST_INITIALIZING) { | |
226 | if (skip != dev_index) { | |
227 | /* Skip devices of this type that aren't the one we want. */ | |
228 | skip += 1; | |
229 | continue; | |
230 | } | |
231 | } else if (sdi->status == SR_ST_INACTIVE) { | |
232 | /* | |
233 | * This device is fully enumerated, so we need to find | |
234 | * this device by vendor, product, bus and address. | |
235 | */ | |
236 | if (libusb_get_bus_number(devlist[i]) != ctx->usb->bus | |
237 | || libusb_get_device_address(devlist[i]) != ctx->usb->address) | |
238 | /* this is not the one */ | |
239 | continue; | |
240 | } | |
241 | ||
242 | if (!(ret = libusb_open(devlist[i], &ctx->usb->devhdl))) { | |
243 | if (ctx->usb->address == 0xff) | |
244 | /* | |
245 | * first time we touch this device after firmware upload, | |
246 | * so we don't know the address yet. | |
247 | */ | |
248 | ctx->usb->address = libusb_get_device_address(devlist[i]); | |
249 | } else { | |
250 | sr_err("fx2lafw: Failed to open device: %d.", ret); | |
251 | break; | |
252 | } | |
253 | ||
254 | ret = command_get_fw_version(ctx->usb->devhdl, &vi); | |
255 | if (ret != SR_OK) { | |
256 | sr_err("fx2lafw: Failed to retrieve " | |
257 | "firmware version information."); | |
258 | break; | |
259 | } | |
260 | ||
261 | ret = command_get_revid_version(ctx->usb->devhdl, &revid); | |
262 | if (ret != SR_OK) { | |
263 | sr_err("fx2lafw: Failed to retrieve REVID."); | |
264 | break; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Changes in major version mean incompatible/API changes, so | |
269 | * bail out if we encounter an incompatible version. | |
270 | * Different minor versions are OK, they should be compatible. | |
271 | */ | |
272 | if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) { | |
273 | sr_err("fx2lafw: Expected firmware version %d.x, " | |
274 | "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR, | |
275 | vi.major, vi.minor); | |
276 | break; | |
277 | } | |
278 | ||
279 | sdi->status = SR_ST_ACTIVE; | |
280 | sr_info("fx2lafw: Opened device %d on %d.%d " | |
281 | "interface %d, firmware %d.%d, REVID %d.", | |
282 | sdi->index, ctx->usb->bus, ctx->usb->address, | |
283 | USB_INTERFACE, vi.major, vi.minor, revid); | |
284 | ||
285 | break; | |
286 | } | |
287 | libusb_free_device_list(devlist, 1); | |
288 | ||
289 | if (sdi->status != SR_ST_ACTIVE) | |
290 | return SR_ERR; | |
291 | ||
292 | return SR_OK; | |
293 | } | |
294 | ||
295 | static void close_dev(struct sr_dev_inst *sdi) | |
296 | { | |
297 | struct context *ctx; | |
298 | ||
299 | ctx = sdi->priv; | |
300 | ||
301 | if (ctx->usb->devhdl == NULL) | |
302 | return; | |
303 | ||
304 | sr_info("fx2lafw: Closing device %d on %d.%d interface %d.", | |
305 | sdi->index, ctx->usb->bus, ctx->usb->address, USB_INTERFACE); | |
306 | libusb_release_interface(ctx->usb->devhdl, USB_INTERFACE); | |
307 | libusb_close(ctx->usb->devhdl); | |
308 | ctx->usb->devhdl = NULL; | |
309 | sdi->status = SR_ST_INACTIVE; | |
310 | } | |
311 | ||
312 | static int configure_probes(struct context *ctx, GSList *probes) | |
313 | { | |
314 | struct sr_probe *probe; | |
315 | GSList *l; | |
316 | int probe_bit, stage, i; | |
317 | char *tc; | |
318 | ||
319 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
320 | ctx->trigger_mask[i] = 0; | |
321 | ctx->trigger_value[i] = 0; | |
322 | } | |
323 | ||
324 | stage = -1; | |
325 | for (l = probes; l; l = l->next) { | |
326 | probe = (struct sr_probe *)l->data; | |
327 | if (probe->enabled == FALSE) | |
328 | continue; | |
329 | ||
330 | if (probe->index > 8) | |
331 | ctx->sample_wide = TRUE; | |
332 | ||
333 | probe_bit = 1 << (probe->index - 1); | |
334 | if (!(probe->trigger)) | |
335 | continue; | |
336 | ||
337 | stage = 0; | |
338 | for (tc = probe->trigger; *tc; tc++) { | |
339 | ctx->trigger_mask[stage] |= probe_bit; | |
340 | if (*tc == '1') | |
341 | ctx->trigger_value[stage] |= probe_bit; | |
342 | stage++; | |
343 | if (stage > NUM_TRIGGER_STAGES) | |
344 | return SR_ERR; | |
345 | } | |
346 | } | |
347 | ||
348 | if (stage == -1) | |
349 | /* | |
350 | * We didn't configure any triggers, make sure acquisition | |
351 | * doesn't wait for any. | |
352 | */ | |
353 | ctx->trigger_stage = TRIGGER_FIRED; | |
354 | else | |
355 | ctx->trigger_stage = 0; | |
356 | ||
357 | return SR_OK; | |
358 | } | |
359 | ||
360 | static struct context *fx2lafw_dev_new(void) | |
361 | { | |
362 | struct context *ctx; | |
363 | ||
364 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
365 | sr_err("fx2lafw: %s: ctx malloc failed.", __func__); | |
366 | return NULL; | |
367 | } | |
368 | ||
369 | ctx->trigger_stage = TRIGGER_FIRED; | |
370 | ||
371 | return ctx; | |
372 | } | |
373 | ||
374 | /* | |
375 | * API callbacks | |
376 | */ | |
377 | ||
378 | static int hw_init(const char *devinfo) | |
379 | { | |
380 | struct sr_dev_inst *sdi; | |
381 | struct libusb_device_descriptor des; | |
382 | const struct fx2lafw_profile *prof; | |
383 | struct context *ctx; | |
384 | libusb_device **devlist; | |
385 | int ret; | |
386 | int devcnt = 0; | |
387 | int i, j; | |
388 | ||
389 | /* Avoid compiler warnings. */ | |
390 | (void)devinfo; | |
391 | ||
392 | if (libusb_init(&usb_context) != 0) { | |
393 | sr_warn("fx2lafw: Failed to initialize libusb."); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | /* Find all fx2lafw compatible devices and upload firmware to them. */ | |
398 | libusb_get_device_list(usb_context, &devlist); | |
399 | for (i = 0; devlist[i]; i++) { | |
400 | ||
401 | if ((ret = libusb_get_device_descriptor( | |
402 | devlist[i], &des)) != 0) { | |
403 | sr_warn("fx2lafw: Failed to get device descriptor: %d.", ret); | |
404 | continue; | |
405 | } | |
406 | ||
407 | prof = NULL; | |
408 | for (j = 0; supported_fx2[j].vid; j++) { | |
409 | if (des.idVendor == supported_fx2[j].vid && | |
410 | des.idProduct == supported_fx2[j].pid) { | |
411 | prof = &supported_fx2[j]; | |
412 | } | |
413 | } | |
414 | ||
415 | /* Skip if the device was not found */ | |
416 | if (!prof) | |
417 | continue; | |
418 | ||
419 | sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING, | |
420 | prof->vendor, prof->model, prof->model_version); | |
421 | if (!sdi) | |
422 | return 0; | |
423 | ||
424 | ctx = fx2lafw_dev_new(); | |
425 | ctx->profile = prof; | |
426 | sdi->priv = ctx; | |
427 | dev_insts = g_slist_append(dev_insts, sdi); | |
428 | ||
429 | if (check_conf_profile(devlist[i])) { | |
430 | /* Already has the firmware, so fix the new address. */ | |
431 | sr_dbg("fx2lafw: Found an fx2lafw device."); | |
432 | sdi->status = SR_ST_INACTIVE; | |
433 | ctx->usb = sr_usb_dev_inst_new | |
434 | (libusb_get_bus_number(devlist[i]), | |
435 | libusb_get_device_address(devlist[i]), NULL); | |
436 | } else { | |
437 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
438 | prof->firmware) == SR_OK) | |
439 | /* Remember when the firmware on this device was updated */ | |
440 | ctx->fw_updated = g_get_monotonic_time(); | |
441 | else | |
442 | sr_err("fx2lafw: Firmware upload failed for " | |
443 | "device %d.", devcnt); | |
444 | ctx->usb = sr_usb_dev_inst_new | |
445 | (libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
446 | } | |
447 | ||
448 | devcnt++; | |
449 | } | |
450 | libusb_free_device_list(devlist, 1); | |
451 | ||
452 | return devcnt; | |
453 | } | |
454 | ||
455 | static int hw_dev_open(int dev_index) | |
456 | { | |
457 | struct sr_dev_inst *sdi; | |
458 | struct context *ctx; | |
459 | int ret; | |
460 | int64_t timediff_us, timediff_ms; | |
461 | ||
462 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
463 | return SR_ERR; | |
464 | ctx = sdi->priv; | |
465 | ||
466 | /* | |
467 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
468 | * milliseconds for the FX2 to renumerate. | |
469 | */ | |
470 | ret = SR_ERR; | |
471 | if (ctx->fw_updated > 0) { | |
472 | sr_info("fx2lafw: Waiting for device to reset."); | |
473 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
474 | g_usleep(300 * 1000); | |
475 | timediff_ms = 0; | |
476 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
477 | if ((ret = fx2lafw_dev_open(dev_index)) == SR_OK) | |
478 | break; | |
479 | g_usleep(100 * 1000); | |
480 | ||
481 | timediff_us = g_get_monotonic_time() - ctx->fw_updated; | |
482 | timediff_ms = timediff_us / 1000; | |
483 | sr_spew("fx2lafw: waited %" PRIi64 " ms", timediff_ms); | |
484 | } | |
485 | sr_info("fx2lafw: Device came back after %d ms.", timediff_ms); | |
486 | } else { | |
487 | ret = fx2lafw_dev_open(dev_index); | |
488 | } | |
489 | ||
490 | if (ret != SR_OK) { | |
491 | sr_err("fx2lafw: Unable to open device."); | |
492 | return SR_ERR; | |
493 | } | |
494 | ctx = sdi->priv; | |
495 | ||
496 | ret = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
497 | if (ret != 0) { | |
498 | switch(ret) { | |
499 | case LIBUSB_ERROR_BUSY: | |
500 | sr_err("fx2lafw: Unable to claim USB interface. Another " | |
501 | "program or driver has already claimed it."); | |
502 | break; | |
503 | ||
504 | case LIBUSB_ERROR_NO_DEVICE: | |
505 | sr_err("fx2lafw: Device has been disconnected."); | |
506 | break; | |
507 | ||
508 | default: | |
509 | sr_err("fx2lafw: Unable to claim interface: %d.", ret); | |
510 | break; | |
511 | } | |
512 | ||
513 | return SR_ERR; | |
514 | } | |
515 | ||
516 | if (ctx->cur_samplerate == 0) { | |
517 | /* Samplerate hasn't been set; default to the slowest one. */ | |
518 | if (hw_dev_config_set(dev_index, SR_HWCAP_SAMPLERATE, | |
519 | &supported_samplerates[0]) == SR_ERR) | |
520 | return SR_ERR; | |
521 | } | |
522 | ||
523 | return SR_OK; | |
524 | } | |
525 | ||
526 | static int hw_dev_close(int dev_index) | |
527 | { | |
528 | struct sr_dev_inst *sdi; | |
529 | ||
530 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
531 | sr_err("fx2lafw: %s: sdi was NULL.", __func__); | |
532 | return SR_ERR_BUG; | |
533 | } | |
534 | ||
535 | /* TODO */ | |
536 | close_dev(sdi); | |
537 | ||
538 | return SR_OK; | |
539 | } | |
540 | ||
541 | static int hw_cleanup(void) | |
542 | { | |
543 | GSList *l; | |
544 | struct sr_dev_inst *sdi; | |
545 | struct context *ctx; | |
546 | int ret = SR_OK; | |
547 | ||
548 | for (l = dev_insts; l; l = l->next) { | |
549 | if (!(sdi = l->data)) { | |
550 | /* Log error, but continue cleaning up the rest. */ | |
551 | sr_err("fx2lafw: %s: sdi was NULL, continuing.", | |
552 | __func__); | |
553 | ret = SR_ERR_BUG; | |
554 | continue; | |
555 | } | |
556 | if (!(ctx = sdi->priv)) { | |
557 | /* Log error, but continue cleaning up the rest. */ | |
558 | sr_err("fx2lafw: %s: sdi->priv was NULL, continuing", | |
559 | __func__); | |
560 | ret = SR_ERR_BUG; | |
561 | continue; | |
562 | } | |
563 | close_dev(sdi); | |
564 | sdi = l->data; | |
565 | sr_dev_inst_free(sdi); | |
566 | } | |
567 | ||
568 | g_slist_free(dev_insts); | |
569 | dev_insts = NULL; | |
570 | ||
571 | if (usb_context) | |
572 | libusb_exit(usb_context); | |
573 | usb_context = NULL; | |
574 | ||
575 | return ret; | |
576 | } | |
577 | ||
578 | static const void *hw_dev_info_get(int dev_index, int dev_info_id) | |
579 | { | |
580 | struct sr_dev_inst *sdi; | |
581 | struct context *ctx; | |
582 | ||
583 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
584 | return NULL; | |
585 | ctx = sdi->priv; | |
586 | ||
587 | switch (dev_info_id) { | |
588 | case SR_DI_INST: | |
589 | return sdi; | |
590 | case SR_DI_NUM_PROBES: | |
591 | return GINT_TO_POINTER( | |
592 | (ctx->profile->dev_caps & DEV_CAPS_16BIT) ? | |
593 | 16 : 8); | |
594 | case SR_DI_PROBE_NAMES: | |
595 | return probe_names; | |
596 | case SR_DI_SAMPLERATES: | |
597 | return &samplerates; | |
598 | case SR_DI_TRIGGER_TYPES: | |
599 | return TRIGGER_TYPES; | |
600 | case SR_DI_CUR_SAMPLERATE: | |
601 | return &ctx->cur_samplerate; | |
602 | } | |
603 | ||
604 | return NULL; | |
605 | } | |
606 | ||
607 | static int hw_dev_status_get(int dev_index) | |
608 | { | |
609 | const struct sr_dev_inst *const sdi = | |
610 | sr_dev_inst_get(dev_insts, dev_index); | |
611 | ||
612 | if (!sdi) | |
613 | return SR_ST_NOT_FOUND; | |
614 | ||
615 | return sdi->status; | |
616 | } | |
617 | ||
618 | static const int *hw_hwcap_get_all(void) | |
619 | { | |
620 | return hwcaps; | |
621 | } | |
622 | ||
623 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value) | |
624 | { | |
625 | struct sr_dev_inst *sdi; | |
626 | struct context *ctx; | |
627 | int ret; | |
628 | ||
629 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
630 | return SR_ERR; | |
631 | ctx = sdi->priv; | |
632 | ||
633 | if (hwcap == SR_HWCAP_SAMPLERATE) { | |
634 | ctx->cur_samplerate = *(const uint64_t *)value; | |
635 | ret = SR_OK; | |
636 | } else if (hwcap == SR_HWCAP_PROBECONFIG) { | |
637 | ret = configure_probes(ctx, (GSList *) value); | |
638 | } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) { | |
639 | ctx->limit_samples = *(const uint64_t *)value; | |
640 | ret = SR_OK; | |
641 | } else { | |
642 | ret = SR_ERR; | |
643 | } | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
648 | static int receive_data(int fd, int revents, void *cb_data) | |
649 | { | |
650 | struct timeval tv; | |
651 | ||
652 | /* Avoid compiler warnings. */ | |
653 | (void)fd; | |
654 | (void)revents; | |
655 | (void)cb_data; | |
656 | ||
657 | tv.tv_sec = tv.tv_usec = 0; | |
658 | libusb_handle_events_timeout(usb_context, &tv); | |
659 | ||
660 | return TRUE; | |
661 | } | |
662 | ||
663 | static void abort_acquisition(struct context *ctx) | |
664 | { | |
665 | unsigned int i; | |
666 | ||
667 | ctx->num_samples = -1; | |
668 | ||
669 | for (i = 0; i < ctx->num_transfers; i++) { | |
670 | if (ctx->transfers[i]) | |
671 | libusb_cancel_transfer(ctx->transfers[i]); | |
672 | } | |
673 | } | |
674 | ||
675 | static void finish_acquisition(struct context *ctx) | |
676 | { | |
677 | struct sr_datafeed_packet packet; | |
678 | int i; | |
679 | ||
680 | /* Terminate session */ | |
681 | packet.type = SR_DF_END; | |
682 | sr_session_send(ctx->session_dev_id, &packet); | |
683 | ||
684 | /* Remove fds from polling */ | |
685 | const struct libusb_pollfd **const lupfd = | |
686 | libusb_get_pollfds(usb_context); | |
687 | for (i = 0; lupfd[i]; i++) | |
688 | sr_source_remove(lupfd[i]->fd); | |
689 | free(lupfd); /* NOT g_free()! */ | |
690 | ||
691 | ctx->num_transfers = 0; | |
692 | g_free(ctx->transfers); | |
693 | } | |
694 | ||
695 | static void free_transfer(struct libusb_transfer *transfer) | |
696 | { | |
697 | struct context *ctx = transfer->user_data; | |
698 | unsigned int i; | |
699 | ||
700 | g_free(transfer->buffer); | |
701 | transfer->buffer = NULL; | |
702 | libusb_free_transfer(transfer); | |
703 | ||
704 | for (i = 0; i < ctx->num_transfers; i++) { | |
705 | if (ctx->transfers[i] == transfer) { | |
706 | ctx->transfers[i] = NULL; | |
707 | break; | |
708 | } | |
709 | } | |
710 | ||
711 | ctx->submitted_transfers--; | |
712 | if (ctx->submitted_transfers == 0) | |
713 | finish_acquisition(ctx); | |
714 | ||
715 | } | |
716 | ||
717 | static void resubmit_transfer(struct libusb_transfer *transfer) | |
718 | { | |
719 | if (libusb_submit_transfer(transfer) != 0) { | |
720 | free_transfer(transfer); | |
721 | /* TODO: Stop session? */ | |
722 | /* TODO: Better error message. */ | |
723 | sr_err("fx2lafw: %s: libusb_submit_transfer error.", __func__); | |
724 | } | |
725 | } | |
726 | ||
727 | static void receive_transfer(struct libusb_transfer *transfer) | |
728 | { | |
729 | gboolean packet_has_error = FALSE; | |
730 | struct sr_datafeed_packet packet; | |
731 | struct sr_datafeed_logic logic; | |
732 | struct context *ctx = transfer->user_data; | |
733 | int trigger_offset, i; | |
734 | ||
735 | /* | |
736 | * If acquisition has already ended, just free any queued up | |
737 | * transfer that come in. | |
738 | */ | |
739 | if (ctx->num_samples == -1) { | |
740 | free_transfer(transfer); | |
741 | return; | |
742 | } | |
743 | ||
744 | sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.", | |
745 | transfer->status, transfer->actual_length); | |
746 | ||
747 | /* Save incoming transfer before reusing the transfer struct. */ | |
748 | uint8_t *const cur_buf = transfer->buffer; | |
749 | const int sample_width = ctx->sample_wide ? 2 : 1; | |
750 | const int cur_sample_count = transfer->actual_length / sample_width; | |
751 | ||
752 | switch (transfer->status) { | |
753 | case LIBUSB_TRANSFER_NO_DEVICE: | |
754 | abort_acquisition(ctx); | |
755 | free_transfer(transfer); | |
756 | return; | |
757 | case LIBUSB_TRANSFER_COMPLETED: | |
758 | case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */ | |
759 | break; | |
760 | default: | |
761 | packet_has_error = TRUE; | |
762 | break; | |
763 | } | |
764 | ||
765 | if (transfer->actual_length == 0 || packet_has_error) { | |
766 | ctx->empty_transfer_count++; | |
767 | if (ctx->empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
768 | /* | |
769 | * The FX2 gave up. End the acquisition, the frontend | |
770 | * will work out that the samplecount is short. | |
771 | */ | |
772 | abort_acquisition(ctx); | |
773 | free_transfer(transfer); | |
774 | } else { | |
775 | resubmit_transfer(transfer); | |
776 | } | |
777 | return; | |
778 | } else { | |
779 | ctx->empty_transfer_count = 0; | |
780 | } | |
781 | ||
782 | trigger_offset = 0; | |
783 | if (ctx->trigger_stage >= 0) { | |
784 | for (i = 0; i < cur_sample_count; i++) { | |
785 | ||
786 | const uint16_t cur_sample = ctx->sample_wide ? | |
787 | *((const uint16_t*)cur_buf + i) : | |
788 | *((const uint8_t*)cur_buf + i); | |
789 | ||
790 | if ((cur_sample & ctx->trigger_mask[ctx->trigger_stage]) == | |
791 | ctx->trigger_value[ctx->trigger_stage]) { | |
792 | /* Match on this trigger stage. */ | |
793 | ctx->trigger_buffer[ctx->trigger_stage] = cur_sample; | |
794 | ctx->trigger_stage++; | |
795 | ||
796 | if (ctx->trigger_stage == NUM_TRIGGER_STAGES || | |
797 | ctx->trigger_mask[ctx->trigger_stage] == 0) { | |
798 | /* Match on all trigger stages, we're done. */ | |
799 | trigger_offset = i + 1; | |
800 | ||
801 | /* | |
802 | * TODO: Send pre-trigger buffer to session bus. | |
803 | * Tell the frontend we hit the trigger here. | |
804 | */ | |
805 | packet.type = SR_DF_TRIGGER; | |
806 | packet.payload = NULL; | |
807 | sr_session_send(ctx->session_dev_id, &packet); | |
808 | ||
809 | /* | |
810 | * Send the samples that triggered it, since we're | |
811 | * skipping past them. | |
812 | */ | |
813 | packet.type = SR_DF_LOGIC; | |
814 | packet.payload = &logic; | |
815 | logic.unitsize = sizeof(*ctx->trigger_buffer); | |
816 | logic.length = ctx->trigger_stage * logic.unitsize; | |
817 | logic.data = ctx->trigger_buffer; | |
818 | sr_session_send(ctx->session_dev_id, &packet); | |
819 | ||
820 | ctx->trigger_stage = TRIGGER_FIRED; | |
821 | break; | |
822 | } | |
823 | } else if (ctx->trigger_stage > 0) { | |
824 | /* | |
825 | * We had a match before, but not in the next sample. However, we may | |
826 | * have a match on this stage in the next bit -- trigger on 0001 will | |
827 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
828 | * the next sample from the one that matched originally, which the | |
829 | * counter increment at the end of the loop takes care of. | |
830 | */ | |
831 | i -= ctx->trigger_stage; | |
832 | if (i < -1) | |
833 | i = -1; /* Oops, went back past this buffer. */ | |
834 | /* Reset trigger stage. */ | |
835 | ctx->trigger_stage = 0; | |
836 | } | |
837 | } | |
838 | } | |
839 | ||
840 | if (ctx->trigger_stage == TRIGGER_FIRED) { | |
841 | /* Send the incoming transfer to the session bus. */ | |
842 | const int trigger_offset_bytes = trigger_offset * sample_width; | |
843 | packet.type = SR_DF_LOGIC; | |
844 | packet.payload = &logic; | |
845 | logic.length = transfer->actual_length - trigger_offset_bytes; | |
846 | logic.unitsize = sample_width; | |
847 | logic.data = cur_buf + trigger_offset_bytes; | |
848 | sr_session_send(ctx->session_dev_id, &packet); | |
849 | ||
850 | ctx->num_samples += cur_sample_count; | |
851 | if (ctx->limit_samples && | |
852 | (unsigned int)ctx->num_samples > ctx->limit_samples) { | |
853 | abort_acquisition(ctx); | |
854 | free_transfer(transfer); | |
855 | return; | |
856 | } | |
857 | } else { | |
858 | /* | |
859 | * TODO: Buffer pre-trigger data in capture | |
860 | * ratio-sized buffer. | |
861 | */ | |
862 | } | |
863 | ||
864 | resubmit_transfer(transfer); | |
865 | } | |
866 | ||
867 | static unsigned int to_bytes_per_ms(unsigned int samplerate) | |
868 | { | |
869 | return samplerate / 1000; | |
870 | } | |
871 | ||
872 | static size_t get_buffer_size(struct context *ctx) | |
873 | { | |
874 | size_t s; | |
875 | ||
876 | /* The buffer should be large enough to hold 10ms of data and a multiple | |
877 | * of 512. */ | |
878 | s = 10 * to_bytes_per_ms(ctx->cur_samplerate); | |
879 | return (s + 511) & ~511; | |
880 | } | |
881 | ||
882 | static unsigned int get_number_of_transfers(struct context *ctx) | |
883 | { | |
884 | unsigned int n; | |
885 | ||
886 | /* Total buffer size should be able to hold about 500ms of data */ | |
887 | n = 500 * to_bytes_per_ms(ctx->cur_samplerate) / get_buffer_size(ctx); | |
888 | ||
889 | if (n > NUM_SIMUL_TRANSFERS) | |
890 | return NUM_SIMUL_TRANSFERS; | |
891 | ||
892 | return n; | |
893 | } | |
894 | ||
895 | static unsigned int get_timeout(struct context *ctx) | |
896 | { | |
897 | size_t total_size; | |
898 | unsigned int timeout; | |
899 | ||
900 | total_size = get_buffer_size(ctx) * get_number_of_transfers(ctx); | |
901 | timeout = total_size / to_bytes_per_ms(ctx->cur_samplerate); | |
902 | return timeout + timeout / 4; /* Leave a headroom of 25% percent */ | |
903 | } | |
904 | ||
905 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
906 | { | |
907 | struct sr_dev_inst *sdi; | |
908 | struct sr_datafeed_packet packet; | |
909 | struct sr_datafeed_header header; | |
910 | struct sr_datafeed_meta_logic meta; | |
911 | struct context *ctx; | |
912 | struct libusb_transfer *transfer; | |
913 | const struct libusb_pollfd **lupfd; | |
914 | unsigned int i; | |
915 | int ret; | |
916 | unsigned char *buf; | |
917 | ||
918 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
919 | return SR_ERR; | |
920 | ctx = sdi->priv; | |
921 | ||
922 | if (ctx->submitted_transfers != 0) | |
923 | return SR_ERR; | |
924 | ||
925 | ctx->session_dev_id = cb_data; | |
926 | ctx->num_samples = 0; | |
927 | ctx->empty_transfer_count = 0; | |
928 | ||
929 | const unsigned int timeout = get_timeout(ctx); | |
930 | const unsigned int num_transfers = get_number_of_transfers(ctx); | |
931 | const size_t size = get_buffer_size(ctx); | |
932 | ||
933 | ctx->transfers = g_try_malloc0(sizeof(*ctx->transfers) * num_transfers); | |
934 | if (!ctx->transfers) | |
935 | return SR_ERR; | |
936 | ||
937 | ctx->num_transfers = num_transfers; | |
938 | ||
939 | for (i = 0; i < num_transfers; i++) { | |
940 | if (!(buf = g_try_malloc(size))) { | |
941 | sr_err("fx2lafw: %s: buf malloc failed.", __func__); | |
942 | return SR_ERR_MALLOC; | |
943 | } | |
944 | transfer = libusb_alloc_transfer(0); | |
945 | libusb_fill_bulk_transfer(transfer, ctx->usb->devhdl, | |
946 | 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
947 | receive_transfer, ctx, timeout); | |
948 | if (libusb_submit_transfer(transfer) != 0) { | |
949 | libusb_free_transfer(transfer); | |
950 | g_free(buf); | |
951 | abort_acquisition(ctx); | |
952 | return SR_ERR; | |
953 | } | |
954 | ctx->transfers[i] = transfer; | |
955 | ctx->submitted_transfers++; | |
956 | } | |
957 | ||
958 | lupfd = libusb_get_pollfds(usb_context); | |
959 | for (i = 0; lupfd[i]; i++) | |
960 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, | |
961 | timeout, receive_data, NULL); | |
962 | free(lupfd); /* NOT g_free()! */ | |
963 | ||
964 | packet.type = SR_DF_HEADER; | |
965 | packet.payload = &header; | |
966 | header.feed_version = 1; | |
967 | gettimeofday(&header.starttime, NULL); | |
968 | sr_session_send(cb_data, &packet); | |
969 | ||
970 | /* Send metadata about the SR_DF_LOGIC packets to come. */ | |
971 | packet.type = SR_DF_META_LOGIC; | |
972 | packet.payload = &meta; | |
973 | meta.samplerate = ctx->cur_samplerate; | |
974 | meta.num_probes = ctx->sample_wide ? 16 : 8; | |
975 | sr_session_send(cb_data, &packet); | |
976 | ||
977 | if ((ret = command_start_acquisition (ctx->usb->devhdl, | |
978 | ctx->cur_samplerate, ctx->sample_wide)) != SR_OK) { | |
979 | abort_acquisition(ctx); | |
980 | return ret; | |
981 | } | |
982 | ||
983 | return SR_OK; | |
984 | } | |
985 | ||
986 | /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */ | |
987 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
988 | { | |
989 | struct sr_dev_inst *sdi; | |
990 | ||
991 | /* Avoid compiler warnings. */ | |
992 | (void)cb_data; | |
993 | ||
994 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
995 | return SR_ERR; | |
996 | ||
997 | abort_acquisition(sdi->priv); | |
998 | ||
999 | return SR_OK; | |
1000 | } | |
1001 | ||
1002 | SR_PRIV struct sr_dev_driver fx2lafw_driver_info = { | |
1003 | .name = "fx2lafw", | |
1004 | .longname = "fx2lafw (generic driver for FX2 based LAs)", | |
1005 | .api_version = 1, | |
1006 | .init = hw_init, | |
1007 | .cleanup = hw_cleanup, | |
1008 | .dev_open = hw_dev_open, | |
1009 | .dev_close = hw_dev_close, | |
1010 | .dev_info_get = hw_dev_info_get, | |
1011 | .dev_status_get = hw_dev_status_get, | |
1012 | .hwcap_get_all = hw_hwcap_get_all, | |
1013 | .dev_config_set = hw_dev_config_set, | |
1014 | .dev_acquisition_start = hw_dev_acquisition_start, | |
1015 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
1016 | }; |