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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 | * CWAV USBee DX | |
43 | * XZL-Studio DX | |
44 | */ | |
45 | { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL, | |
46 | FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw", | |
47 | DEV_CAPS_16BIT }, | |
48 | ||
49 | /* | |
50 | * CWAV USBee SX | |
51 | */ | |
52 | { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL, | |
53 | FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw", | |
54 | 0 }, | |
55 | ||
56 | /* | |
57 | * Saleae Logic | |
58 | * EE Electronics ESLA100 | |
59 | * Robomotic MiniLogic | |
60 | * Robomotic BugLogic 3 | |
61 | */ | |
62 | { 0x0925, 0x3881, "Saleae", "Logic", NULL, | |
63 | FIRMWARE_DIR "/fx2lafw-saleae-logic.fw", | |
64 | 0 }, | |
65 | ||
66 | /* | |
67 | * Default Cypress FX2 without EEPROM, e.g.: | |
68 | * Lcsoft Mini Board | |
69 | * Braintechnology USB Interface V2.x | |
70 | */ | |
71 | { 0x04B4, 0x8613, "Cypress", "FX2", NULL, | |
72 | FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw", | |
73 | DEV_CAPS_16BIT }, | |
74 | ||
75 | /* | |
76 | * Braintechnology USB-LPS | |
77 | */ | |
78 | { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL, | |
79 | FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw", | |
80 | DEV_CAPS_16BIT }, | |
81 | ||
82 | { 0, 0, 0, 0, 0, 0, 0 } | |
83 | }; | |
84 | ||
85 | static const int hwcaps[] = { | |
86 | SR_HWCAP_LOGIC_ANALYZER, | |
87 | SR_HWCAP_SAMPLERATE, | |
88 | ||
89 | /* These are really implemented in the driver, not the hardware. */ | |
90 | SR_HWCAP_LIMIT_SAMPLES, | |
91 | SR_HWCAP_CONTINUOUS, | |
92 | 0, | |
93 | }; | |
94 | ||
95 | static const char *probe_names[] = { | |
96 | "0", | |
97 | "1", | |
98 | "2", | |
99 | "3", | |
100 | "4", | |
101 | "5", | |
102 | "6", | |
103 | "7", | |
104 | "8", | |
105 | "9", | |
106 | "10", | |
107 | "11", | |
108 | "12", | |
109 | "13", | |
110 | "14", | |
111 | "15", | |
112 | NULL, | |
113 | }; | |
114 | ||
115 | static const uint64_t supported_samplerates[] = { | |
116 | SR_KHZ(20), | |
117 | SR_KHZ(25), | |
118 | SR_KHZ(50), | |
119 | SR_KHZ(100), | |
120 | SR_KHZ(200), | |
121 | SR_KHZ(250), | |
122 | SR_KHZ(500), | |
123 | SR_MHZ(1), | |
124 | SR_MHZ(2), | |
125 | SR_MHZ(3), | |
126 | SR_MHZ(4), | |
127 | SR_MHZ(6), | |
128 | SR_MHZ(8), | |
129 | SR_MHZ(12), | |
130 | SR_MHZ(16), | |
131 | SR_MHZ(24), | |
132 | 0, | |
133 | }; | |
134 | ||
135 | static const struct sr_samplerates samplerates = { | |
136 | 0, | |
137 | 0, | |
138 | 0, | |
139 | supported_samplerates, | |
140 | }; | |
141 | ||
142 | static libusb_context *usb_context = NULL; | |
143 | ||
144 | SR_PRIV struct sr_dev_driver fx2lafw_driver_info; | |
145 | static struct sr_dev_driver *fdi = &fx2lafw_driver_info; | |
146 | static int hw_dev_close(struct sr_dev_inst *sdi); | |
147 | static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap, | |
148 | const void *value); | |
149 | static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, | |
150 | void *cb_data); | |
151 | ||
152 | /** | |
153 | * Check the USB configuration to determine if this is an fx2lafw device. | |
154 | * | |
155 | * @return TRUE if the device's configuration profile match fx2lafw | |
156 | * configuration, FALSE otherwise. | |
157 | */ | |
158 | static gboolean check_conf_profile(libusb_device *dev) | |
159 | { | |
160 | struct libusb_device_descriptor des; | |
161 | struct libusb_device_handle *hdl; | |
162 | gboolean ret; | |
163 | unsigned char strdesc[64]; | |
164 | ||
165 | hdl = NULL; | |
166 | ret = FALSE; | |
167 | while (!ret) { | |
168 | /* Assume the FW has not been loaded, unless proven wrong. */ | |
169 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
170 | break; | |
171 | ||
172 | if (libusb_open(dev, &hdl) != 0) | |
173 | break; | |
174 | ||
175 | if (libusb_get_string_descriptor_ascii(hdl, | |
176 | des.iManufacturer, strdesc, sizeof(strdesc)) < 0) | |
177 | break; | |
178 | if (strncmp((const char *)strdesc, "sigrok", 6)) | |
179 | break; | |
180 | ||
181 | if (libusb_get_string_descriptor_ascii(hdl, | |
182 | des.iProduct, strdesc, sizeof(strdesc)) < 0) | |
183 | break; | |
184 | if (strncmp((const char *)strdesc, "fx2lafw", 7)) | |
185 | break; | |
186 | ||
187 | /* If we made it here, it must be an fx2lafw. */ | |
188 | ret = TRUE; | |
189 | } | |
190 | if (hdl) | |
191 | libusb_close(hdl); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | static int fx2lafw_dev_open(struct sr_dev_inst *sdi) | |
197 | { | |
198 | libusb_device **devlist; | |
199 | struct libusb_device_descriptor des; | |
200 | struct context *ctx; | |
201 | struct version_info vi; | |
202 | int ret, skip, i; | |
203 | uint8_t revid; | |
204 | ||
205 | ctx = sdi->priv; | |
206 | ||
207 | if (sdi->status == SR_ST_ACTIVE) | |
208 | /* already in use */ | |
209 | return SR_ERR; | |
210 | ||
211 | skip = 0; | |
212 | const int device_count = libusb_get_device_list(usb_context, &devlist); | |
213 | if (device_count < 0) { | |
214 | sr_err("fx2lafw: Failed to retrieve device list (%d)", | |
215 | device_count); | |
216 | return SR_ERR; | |
217 | } | |
218 | ||
219 | for (i = 0; i < device_count; i++) { | |
220 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
221 | sr_err("fx2lafw: Failed to get device descriptor: %d.", | |
222 | ret); | |
223 | continue; | |
224 | } | |
225 | ||
226 | if (des.idVendor != ctx->profile->vid | |
227 | || des.idProduct != ctx->profile->pid) | |
228 | continue; | |
229 | ||
230 | if (sdi->status == SR_ST_INITIALIZING) { | |
231 | if (skip != sdi->index) { | |
232 | /* Skip devices of this type that aren't the one we want. */ | |
233 | skip += 1; | |
234 | continue; | |
235 | } | |
236 | } else if (sdi->status == SR_ST_INACTIVE) { | |
237 | /* | |
238 | * This device is fully enumerated, so we need to find | |
239 | * this device by vendor, product, bus and address. | |
240 | */ | |
241 | if (libusb_get_bus_number(devlist[i]) != ctx->usb->bus | |
242 | || libusb_get_device_address(devlist[i]) != ctx->usb->address) | |
243 | /* this is not the one */ | |
244 | continue; | |
245 | } | |
246 | ||
247 | if (!(ret = libusb_open(devlist[i], &ctx->usb->devhdl))) { | |
248 | if (ctx->usb->address == 0xff) | |
249 | /* | |
250 | * first time we touch this device after firmware upload, | |
251 | * so we don't know the address yet. | |
252 | */ | |
253 | ctx->usb->address = libusb_get_device_address(devlist[i]); | |
254 | } else { | |
255 | sr_err("fx2lafw: Failed to open device: %d.", ret); | |
256 | break; | |
257 | } | |
258 | ||
259 | ret = command_get_fw_version(ctx->usb->devhdl, &vi); | |
260 | if (ret != SR_OK) { | |
261 | sr_err("fx2lafw: Failed to retrieve " | |
262 | "firmware version information."); | |
263 | break; | |
264 | } | |
265 | ||
266 | ret = command_get_revid_version(ctx->usb->devhdl, &revid); | |
267 | if (ret != SR_OK) { | |
268 | sr_err("fx2lafw: Failed to retrieve REVID."); | |
269 | break; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Changes in major version mean incompatible/API changes, so | |
274 | * bail out if we encounter an incompatible version. | |
275 | * Different minor versions are OK, they should be compatible. | |
276 | */ | |
277 | if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) { | |
278 | sr_err("fx2lafw: Expected firmware version %d.x, " | |
279 | "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR, | |
280 | vi.major, vi.minor); | |
281 | break; | |
282 | } | |
283 | ||
284 | sdi->status = SR_ST_ACTIVE; | |
285 | sr_info("fx2lafw: Opened device %d on %d.%d " | |
286 | "interface %d, firmware %d.%d, REVID %d.", | |
287 | sdi->index, ctx->usb->bus, ctx->usb->address, | |
288 | USB_INTERFACE, vi.major, vi.minor, revid); | |
289 | ||
290 | break; | |
291 | } | |
292 | libusb_free_device_list(devlist, 1); | |
293 | ||
294 | if (sdi->status != SR_ST_ACTIVE) | |
295 | return SR_ERR; | |
296 | ||
297 | return SR_OK; | |
298 | } | |
299 | ||
300 | static int configure_probes(struct context *ctx, GSList *probes) | |
301 | { | |
302 | struct sr_probe *probe; | |
303 | GSList *l; | |
304 | int probe_bit, stage, i; | |
305 | char *tc; | |
306 | ||
307 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
308 | ctx->trigger_mask[i] = 0; | |
309 | ctx->trigger_value[i] = 0; | |
310 | } | |
311 | ||
312 | stage = -1; | |
313 | for (l = probes; l; l = l->next) { | |
314 | probe = (struct sr_probe *)l->data; | |
315 | if (probe->enabled == FALSE) | |
316 | continue; | |
317 | ||
318 | if (probe->index > 8) | |
319 | ctx->sample_wide = TRUE; | |
320 | ||
321 | probe_bit = 1 << (probe->index - 1); | |
322 | if (!(probe->trigger)) | |
323 | continue; | |
324 | ||
325 | stage = 0; | |
326 | for (tc = probe->trigger; *tc; tc++) { | |
327 | ctx->trigger_mask[stage] |= probe_bit; | |
328 | if (*tc == '1') | |
329 | ctx->trigger_value[stage] |= probe_bit; | |
330 | stage++; | |
331 | if (stage > NUM_TRIGGER_STAGES) | |
332 | return SR_ERR; | |
333 | } | |
334 | } | |
335 | ||
336 | if (stage == -1) | |
337 | /* | |
338 | * We didn't configure any triggers, make sure acquisition | |
339 | * doesn't wait for any. | |
340 | */ | |
341 | ctx->trigger_stage = TRIGGER_FIRED; | |
342 | else | |
343 | ctx->trigger_stage = 0; | |
344 | ||
345 | return SR_OK; | |
346 | } | |
347 | ||
348 | static struct context *fx2lafw_dev_new(void) | |
349 | { | |
350 | struct context *ctx; | |
351 | ||
352 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
353 | sr_err("fx2lafw: %s: ctx malloc failed.", __func__); | |
354 | return NULL; | |
355 | } | |
356 | ||
357 | ctx->trigger_stage = TRIGGER_FIRED; | |
358 | ||
359 | return ctx; | |
360 | } | |
361 | ||
362 | static int clear_instances(void) | |
363 | { | |
364 | GSList *l; | |
365 | struct sr_dev_inst *sdi; | |
366 | struct context *ctx; | |
367 | int ret; | |
368 | ||
369 | ret = SR_OK; | |
370 | for (l = fdi->instances; l; l = l->next) { | |
371 | if (!(sdi = l->data)) { | |
372 | /* Log error, but continue cleaning up the rest. */ | |
373 | sr_err("fx2lafw: %s: sdi was NULL, continuing.", | |
374 | __func__); | |
375 | ret = SR_ERR_BUG; | |
376 | continue; | |
377 | } | |
378 | if (!(ctx = sdi->priv)) { | |
379 | /* Log error, but continue cleaning up the rest. */ | |
380 | sr_err("fx2lafw: %s: sdi->priv was NULL, continuing", | |
381 | __func__); | |
382 | ret = SR_ERR_BUG; | |
383 | continue; | |
384 | } | |
385 | hw_dev_close(sdi); | |
386 | sdi = l->data; | |
387 | sr_dev_inst_free(sdi); | |
388 | } | |
389 | ||
390 | g_slist_free(fdi->instances); | |
391 | fdi->instances = NULL; | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
396 | ||
397 | /* | |
398 | * API callbacks | |
399 | */ | |
400 | ||
401 | static int hw_init(void) | |
402 | { | |
403 | ||
404 | if (libusb_init(&usb_context) != 0) { | |
405 | sr_warn("fx2lafw: Failed to initialize libusb."); | |
406 | return SR_ERR; | |
407 | } | |
408 | ||
409 | return SR_OK; | |
410 | } | |
411 | ||
412 | static GSList *hw_scan(GSList *options) | |
413 | { | |
414 | GSList *devices; | |
415 | struct libusb_device_descriptor des; | |
416 | struct sr_dev_inst *sdi; | |
417 | const struct fx2lafw_profile *prof; | |
418 | struct context *ctx; | |
419 | struct sr_probe *probe; | |
420 | libusb_device **devlist; | |
421 | int devcnt, num_logic_probes, ret, i, j; | |
422 | ||
423 | /* Avoid compiler warnings. */ | |
424 | (void)options; | |
425 | ||
426 | /* This scan always invalidates any previous scans. */ | |
427 | clear_instances(); | |
428 | ||
429 | /* Find all fx2lafw compatible devices and upload firmware to them. */ | |
430 | devices = NULL; | |
431 | libusb_get_device_list(usb_context, &devlist); | |
432 | for (i = 0; devlist[i]; i++) { | |
433 | ||
434 | if ((ret = libusb_get_device_descriptor( | |
435 | devlist[i], &des)) != 0) { | |
436 | sr_warn("fx2lafw: Failed to get device descriptor: %d.", ret); | |
437 | continue; | |
438 | } | |
439 | ||
440 | prof = NULL; | |
441 | for (j = 0; supported_fx2[j].vid; j++) { | |
442 | if (des.idVendor == supported_fx2[j].vid && | |
443 | des.idProduct == supported_fx2[j].pid) { | |
444 | prof = &supported_fx2[j]; | |
445 | } | |
446 | } | |
447 | ||
448 | /* Skip if the device was not found */ | |
449 | if (!prof) | |
450 | continue; | |
451 | ||
452 | devcnt = g_slist_length(fdi->instances); | |
453 | sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING, | |
454 | prof->vendor, prof->model, prof->model_version); | |
455 | if (!sdi) | |
456 | return NULL; | |
457 | sdi->driver = fdi; | |
458 | ||
459 | /* Fill in probelist according to this device's profile. */ | |
460 | num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8; | |
461 | for (j = 0; j < num_logic_probes; j++) { | |
462 | if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE, | |
463 | probe_names[j]))) | |
464 | return NULL; | |
465 | sdi->probes = g_slist_append(sdi->probes, probe); | |
466 | } | |
467 | ||
468 | ctx = fx2lafw_dev_new(); | |
469 | ctx->profile = prof; | |
470 | sdi->priv = ctx; | |
471 | fdi->instances = g_slist_append(fdi->instances, sdi); | |
472 | devices = g_slist_append(devices, sdi); | |
473 | ||
474 | if (check_conf_profile(devlist[i])) { | |
475 | /* Already has the firmware, so fix the new address. */ | |
476 | sr_dbg("fx2lafw: Found an fx2lafw device."); | |
477 | sdi->status = SR_ST_INACTIVE; | |
478 | ctx->usb = sr_usb_dev_inst_new | |
479 | (libusb_get_bus_number(devlist[i]), | |
480 | libusb_get_device_address(devlist[i]), NULL); | |
481 | } else { | |
482 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
483 | prof->firmware) == SR_OK) | |
484 | /* Remember when the firmware on this device was updated */ | |
485 | ctx->fw_updated = g_get_monotonic_time(); | |
486 | else | |
487 | sr_err("fx2lafw: Firmware upload failed for " | |
488 | "device %d.", devcnt); | |
489 | ctx->usb = sr_usb_dev_inst_new | |
490 | (libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
491 | } | |
492 | } | |
493 | libusb_free_device_list(devlist, 1); | |
494 | ||
495 | return devices; | |
496 | } | |
497 | ||
498 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
499 | { | |
500 | struct context *ctx; | |
501 | int ret; | |
502 | int64_t timediff_us, timediff_ms; | |
503 | ||
504 | ctx = sdi->priv; | |
505 | ||
506 | /* | |
507 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
508 | * milliseconds for the FX2 to renumerate. | |
509 | */ | |
510 | ret = SR_ERR; | |
511 | if (ctx->fw_updated > 0) { | |
512 | sr_info("fx2lafw: Waiting for device to reset."); | |
513 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
514 | g_usleep(300 * 1000); | |
515 | timediff_ms = 0; | |
516 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
517 | if ((ret = fx2lafw_dev_open(sdi)) == SR_OK) | |
518 | break; | |
519 | g_usleep(100 * 1000); | |
520 | ||
521 | timediff_us = g_get_monotonic_time() - ctx->fw_updated; | |
522 | timediff_ms = timediff_us / 1000; | |
523 | sr_spew("fx2lafw: waited %" PRIi64 " ms", timediff_ms); | |
524 | } | |
525 | sr_info("fx2lafw: Device came back after %d ms.", timediff_ms); | |
526 | } else { | |
527 | ret = fx2lafw_dev_open(sdi); | |
528 | } | |
529 | ||
530 | if (ret != SR_OK) { | |
531 | sr_err("fx2lafw: Unable to open device."); | |
532 | return SR_ERR; | |
533 | } | |
534 | ctx = sdi->priv; | |
535 | ||
536 | ret = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
537 | if (ret != 0) { | |
538 | switch(ret) { | |
539 | case LIBUSB_ERROR_BUSY: | |
540 | sr_err("fx2lafw: Unable to claim USB interface. Another " | |
541 | "program or driver has already claimed it."); | |
542 | break; | |
543 | ||
544 | case LIBUSB_ERROR_NO_DEVICE: | |
545 | sr_err("fx2lafw: Device has been disconnected."); | |
546 | break; | |
547 | ||
548 | default: | |
549 | sr_err("fx2lafw: Unable to claim interface: %d.", ret); | |
550 | break; | |
551 | } | |
552 | ||
553 | return SR_ERR; | |
554 | } | |
555 | ||
556 | if (ctx->cur_samplerate == 0) { | |
557 | /* Samplerate hasn't been set; default to the slowest one. */ | |
558 | if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE, | |
559 | &supported_samplerates[0]) == SR_ERR) | |
560 | return SR_ERR; | |
561 | } | |
562 | ||
563 | return SR_OK; | |
564 | } | |
565 | ||
566 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
567 | { | |
568 | struct context *ctx; | |
569 | ||
570 | ctx = sdi->priv; | |
571 | if (ctx->usb->devhdl == NULL) | |
572 | return SR_ERR; | |
573 | ||
574 | sr_info("fx2lafw: Closing device %d on %d.%d interface %d.", | |
575 | sdi->index, ctx->usb->bus, ctx->usb->address, USB_INTERFACE); | |
576 | libusb_release_interface(ctx->usb->devhdl, USB_INTERFACE); | |
577 | libusb_close(ctx->usb->devhdl); | |
578 | ctx->usb->devhdl = NULL; | |
579 | sdi->status = SR_ST_INACTIVE; | |
580 | ||
581 | return SR_OK; | |
582 | } | |
583 | ||
584 | static int hw_cleanup(void) | |
585 | { | |
586 | int ret; | |
587 | ||
588 | ret = clear_instances(); | |
589 | ||
590 | if (usb_context) | |
591 | libusb_exit(usb_context); | |
592 | usb_context = NULL; | |
593 | ||
594 | return ret; | |
595 | } | |
596 | ||
597 | static int hw_info_get(int info_id, const void **data, | |
598 | const struct sr_dev_inst *sdi) | |
599 | { | |
600 | struct context *ctx; | |
601 | ||
602 | switch (info_id) { | |
603 | case SR_DI_INST: | |
604 | *data = sdi; | |
605 | break; | |
606 | case SR_DI_HWCAPS: | |
607 | *data = hwcaps; | |
608 | break; | |
609 | case SR_DI_NUM_PROBES: | |
610 | if (sdi) { | |
611 | ctx = sdi->priv; | |
612 | *data = GINT_TO_POINTER( | |
613 | (ctx->profile->dev_caps & DEV_CAPS_16BIT) ? | |
614 | 16 : 8); | |
615 | } else | |
616 | return SR_ERR; | |
617 | break; | |
618 | case SR_DI_PROBE_NAMES: | |
619 | *data = probe_names; | |
620 | break; | |
621 | case SR_DI_SAMPLERATES: | |
622 | *data = &samplerates; | |
623 | break; | |
624 | case SR_DI_TRIGGER_TYPES: | |
625 | *data = TRIGGER_TYPES; | |
626 | break; | |
627 | case SR_DI_CUR_SAMPLERATE: | |
628 | if (sdi) { | |
629 | ctx = sdi->priv; | |
630 | *data = &ctx->cur_samplerate; | |
631 | } else | |
632 | return SR_ERR; | |
633 | break; | |
634 | default: | |
635 | return SR_ERR_ARG; | |
636 | } | |
637 | ||
638 | return SR_OK; | |
639 | } | |
640 | ||
641 | static int hw_dev_status_get(int dev_index) | |
642 | { | |
643 | const struct sr_dev_inst *const sdi = | |
644 | sr_dev_inst_get(fdi->instances, dev_index); | |
645 | ||
646 | if (!sdi) | |
647 | return SR_ST_NOT_FOUND; | |
648 | ||
649 | return sdi->status; | |
650 | } | |
651 | ||
652 | static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap, | |
653 | const void *value) | |
654 | { | |
655 | struct context *ctx; | |
656 | int ret; | |
657 | ||
658 | ctx = sdi->priv; | |
659 | ||
660 | if (hwcap == SR_HWCAP_SAMPLERATE) { | |
661 | ctx->cur_samplerate = *(const uint64_t *)value; | |
662 | ret = SR_OK; | |
663 | } else if (hwcap == SR_HWCAP_PROBECONFIG) { | |
664 | ret = configure_probes(ctx, (GSList *) value); | |
665 | } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) { | |
666 | ctx->limit_samples = *(const uint64_t *)value; | |
667 | ret = SR_OK; | |
668 | } else { | |
669 | ret = SR_ERR; | |
670 | } | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | static int receive_data(int fd, int revents, void *cb_data) | |
676 | { | |
677 | struct timeval tv; | |
678 | ||
679 | /* Avoid compiler warnings. */ | |
680 | (void)fd; | |
681 | (void)revents; | |
682 | (void)cb_data; | |
683 | ||
684 | tv.tv_sec = tv.tv_usec = 0; | |
685 | libusb_handle_events_timeout(usb_context, &tv); | |
686 | ||
687 | return TRUE; | |
688 | } | |
689 | ||
690 | static void abort_acquisition(struct context *ctx) | |
691 | { | |
692 | int i; | |
693 | ||
694 | ctx->num_samples = -1; | |
695 | ||
696 | for (i = ctx->num_transfers - 1; i >= 0; i--) { | |
697 | if (ctx->transfers[i]) | |
698 | libusb_cancel_transfer(ctx->transfers[i]); | |
699 | } | |
700 | } | |
701 | ||
702 | static void finish_acquisition(struct context *ctx) | |
703 | { | |
704 | struct sr_datafeed_packet packet; | |
705 | int i; | |
706 | ||
707 | /* Terminate session */ | |
708 | packet.type = SR_DF_END; | |
709 | sr_session_send(ctx->session_dev_id, &packet); | |
710 | ||
711 | /* Remove fds from polling */ | |
712 | const struct libusb_pollfd **const lupfd = | |
713 | libusb_get_pollfds(usb_context); | |
714 | for (i = 0; lupfd[i]; i++) | |
715 | sr_source_remove(lupfd[i]->fd); | |
716 | free(lupfd); /* NOT g_free()! */ | |
717 | ||
718 | ctx->num_transfers = 0; | |
719 | g_free(ctx->transfers); | |
720 | } | |
721 | ||
722 | static void free_transfer(struct libusb_transfer *transfer) | |
723 | { | |
724 | struct context *ctx = transfer->user_data; | |
725 | unsigned int i; | |
726 | ||
727 | g_free(transfer->buffer); | |
728 | transfer->buffer = NULL; | |
729 | libusb_free_transfer(transfer); | |
730 | ||
731 | for (i = 0; i < ctx->num_transfers; i++) { | |
732 | if (ctx->transfers[i] == transfer) { | |
733 | ctx->transfers[i] = NULL; | |
734 | break; | |
735 | } | |
736 | } | |
737 | ||
738 | ctx->submitted_transfers--; | |
739 | if (ctx->submitted_transfers == 0) | |
740 | finish_acquisition(ctx); | |
741 | ||
742 | } | |
743 | ||
744 | static void resubmit_transfer(struct libusb_transfer *transfer) | |
745 | { | |
746 | if (libusb_submit_transfer(transfer) != 0) { | |
747 | free_transfer(transfer); | |
748 | /* TODO: Stop session? */ | |
749 | /* TODO: Better error message. */ | |
750 | sr_err("fx2lafw: %s: libusb_submit_transfer error.", __func__); | |
751 | } | |
752 | } | |
753 | ||
754 | static void receive_transfer(struct libusb_transfer *transfer) | |
755 | { | |
756 | gboolean packet_has_error = FALSE; | |
757 | struct sr_datafeed_packet packet; | |
758 | struct sr_datafeed_logic logic; | |
759 | struct context *ctx = transfer->user_data; | |
760 | int trigger_offset, i; | |
761 | ||
762 | /* | |
763 | * If acquisition has already ended, just free any queued up | |
764 | * transfer that come in. | |
765 | */ | |
766 | if (ctx->num_samples == -1) { | |
767 | free_transfer(transfer); | |
768 | return; | |
769 | } | |
770 | ||
771 | sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.", | |
772 | transfer->status, transfer->actual_length); | |
773 | ||
774 | /* Save incoming transfer before reusing the transfer struct. */ | |
775 | uint8_t *const cur_buf = transfer->buffer; | |
776 | const int sample_width = ctx->sample_wide ? 2 : 1; | |
777 | const int cur_sample_count = transfer->actual_length / sample_width; | |
778 | ||
779 | switch (transfer->status) { | |
780 | case LIBUSB_TRANSFER_NO_DEVICE: | |
781 | abort_acquisition(ctx); | |
782 | free_transfer(transfer); | |
783 | return; | |
784 | case LIBUSB_TRANSFER_COMPLETED: | |
785 | case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */ | |
786 | break; | |
787 | default: | |
788 | packet_has_error = TRUE; | |
789 | break; | |
790 | } | |
791 | ||
792 | if (transfer->actual_length == 0 || packet_has_error) { | |
793 | ctx->empty_transfer_count++; | |
794 | if (ctx->empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
795 | /* | |
796 | * The FX2 gave up. End the acquisition, the frontend | |
797 | * will work out that the samplecount is short. | |
798 | */ | |
799 | abort_acquisition(ctx); | |
800 | free_transfer(transfer); | |
801 | } else { | |
802 | resubmit_transfer(transfer); | |
803 | } | |
804 | return; | |
805 | } else { | |
806 | ctx->empty_transfer_count = 0; | |
807 | } | |
808 | ||
809 | trigger_offset = 0; | |
810 | if (ctx->trigger_stage >= 0) { | |
811 | for (i = 0; i < cur_sample_count; i++) { | |
812 | ||
813 | const uint16_t cur_sample = ctx->sample_wide ? | |
814 | *((const uint16_t*)cur_buf + i) : | |
815 | *((const uint8_t*)cur_buf + i); | |
816 | ||
817 | if ((cur_sample & ctx->trigger_mask[ctx->trigger_stage]) == | |
818 | ctx->trigger_value[ctx->trigger_stage]) { | |
819 | /* Match on this trigger stage. */ | |
820 | ctx->trigger_buffer[ctx->trigger_stage] = cur_sample; | |
821 | ctx->trigger_stage++; | |
822 | ||
823 | if (ctx->trigger_stage == NUM_TRIGGER_STAGES || | |
824 | ctx->trigger_mask[ctx->trigger_stage] == 0) { | |
825 | /* Match on all trigger stages, we're done. */ | |
826 | trigger_offset = i + 1; | |
827 | ||
828 | /* | |
829 | * TODO: Send pre-trigger buffer to session bus. | |
830 | * Tell the frontend we hit the trigger here. | |
831 | */ | |
832 | packet.type = SR_DF_TRIGGER; | |
833 | packet.payload = NULL; | |
834 | sr_session_send(ctx->session_dev_id, &packet); | |
835 | ||
836 | /* | |
837 | * Send the samples that triggered it, since we're | |
838 | * skipping past them. | |
839 | */ | |
840 | packet.type = SR_DF_LOGIC; | |
841 | packet.payload = &logic; | |
842 | logic.unitsize = sizeof(*ctx->trigger_buffer); | |
843 | logic.length = ctx->trigger_stage * logic.unitsize; | |
844 | logic.data = ctx->trigger_buffer; | |
845 | sr_session_send(ctx->session_dev_id, &packet); | |
846 | ||
847 | ctx->trigger_stage = TRIGGER_FIRED; | |
848 | break; | |
849 | } | |
850 | } else if (ctx->trigger_stage > 0) { | |
851 | /* | |
852 | * We had a match before, but not in the next sample. However, we may | |
853 | * have a match on this stage in the next bit -- trigger on 0001 will | |
854 | * fail on seeing 00001, so we need to go back to stage 0 -- but at | |
855 | * the next sample from the one that matched originally, which the | |
856 | * counter increment at the end of the loop takes care of. | |
857 | */ | |
858 | i -= ctx->trigger_stage; | |
859 | if (i < -1) | |
860 | i = -1; /* Oops, went back past this buffer. */ | |
861 | /* Reset trigger stage. */ | |
862 | ctx->trigger_stage = 0; | |
863 | } | |
864 | } | |
865 | } | |
866 | ||
867 | if (ctx->trigger_stage == TRIGGER_FIRED) { | |
868 | /* Send the incoming transfer to the session bus. */ | |
869 | const int trigger_offset_bytes = trigger_offset * sample_width; | |
870 | packet.type = SR_DF_LOGIC; | |
871 | packet.payload = &logic; | |
872 | logic.length = transfer->actual_length - trigger_offset_bytes; | |
873 | logic.unitsize = sample_width; | |
874 | logic.data = cur_buf + trigger_offset_bytes; | |
875 | sr_session_send(ctx->session_dev_id, &packet); | |
876 | ||
877 | ctx->num_samples += cur_sample_count; | |
878 | if (ctx->limit_samples && | |
879 | (unsigned int)ctx->num_samples > ctx->limit_samples) { | |
880 | abort_acquisition(ctx); | |
881 | free_transfer(transfer); | |
882 | return; | |
883 | } | |
884 | } else { | |
885 | /* | |
886 | * TODO: Buffer pre-trigger data in capture | |
887 | * ratio-sized buffer. | |
888 | */ | |
889 | } | |
890 | ||
891 | resubmit_transfer(transfer); | |
892 | } | |
893 | ||
894 | static unsigned int to_bytes_per_ms(unsigned int samplerate) | |
895 | { | |
896 | return samplerate / 1000; | |
897 | } | |
898 | ||
899 | static size_t get_buffer_size(struct context *ctx) | |
900 | { | |
901 | size_t s; | |
902 | ||
903 | /* The buffer should be large enough to hold 10ms of data and a multiple | |
904 | * of 512. */ | |
905 | s = 10 * to_bytes_per_ms(ctx->cur_samplerate); | |
906 | return (s + 511) & ~511; | |
907 | } | |
908 | ||
909 | static unsigned int get_number_of_transfers(struct context *ctx) | |
910 | { | |
911 | unsigned int n; | |
912 | ||
913 | /* Total buffer size should be able to hold about 500ms of data */ | |
914 | n = 500 * to_bytes_per_ms(ctx->cur_samplerate) / get_buffer_size(ctx); | |
915 | ||
916 | if (n > NUM_SIMUL_TRANSFERS) | |
917 | return NUM_SIMUL_TRANSFERS; | |
918 | ||
919 | return n; | |
920 | } | |
921 | ||
922 | static unsigned int get_timeout(struct context *ctx) | |
923 | { | |
924 | size_t total_size; | |
925 | unsigned int timeout; | |
926 | ||
927 | total_size = get_buffer_size(ctx) * get_number_of_transfers(ctx); | |
928 | timeout = total_size / to_bytes_per_ms(ctx->cur_samplerate); | |
929 | return timeout + timeout / 4; /* Leave a headroom of 25% percent */ | |
930 | } | |
931 | ||
932 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
933 | void *cb_data) | |
934 | { | |
935 | struct sr_datafeed_packet packet; | |
936 | struct sr_datafeed_header header; | |
937 | struct sr_datafeed_meta_logic meta; | |
938 | struct context *ctx; | |
939 | struct libusb_transfer *transfer; | |
940 | const struct libusb_pollfd **lupfd; | |
941 | unsigned int i; | |
942 | int ret; | |
943 | unsigned char *buf; | |
944 | ||
945 | ctx = sdi->priv; | |
946 | if (ctx->submitted_transfers != 0) | |
947 | return SR_ERR; | |
948 | ||
949 | ctx->session_dev_id = cb_data; | |
950 | ctx->num_samples = 0; | |
951 | ctx->empty_transfer_count = 0; | |
952 | ||
953 | const unsigned int timeout = get_timeout(ctx); | |
954 | const unsigned int num_transfers = get_number_of_transfers(ctx); | |
955 | const size_t size = get_buffer_size(ctx); | |
956 | ||
957 | ctx->transfers = g_try_malloc0(sizeof(*ctx->transfers) * num_transfers); | |
958 | if (!ctx->transfers) | |
959 | return SR_ERR; | |
960 | ||
961 | ctx->num_transfers = num_transfers; | |
962 | ||
963 | for (i = 0; i < num_transfers; i++) { | |
964 | if (!(buf = g_try_malloc(size))) { | |
965 | sr_err("fx2lafw: %s: buf malloc failed.", __func__); | |
966 | return SR_ERR_MALLOC; | |
967 | } | |
968 | transfer = libusb_alloc_transfer(0); | |
969 | libusb_fill_bulk_transfer(transfer, ctx->usb->devhdl, | |
970 | 2 | LIBUSB_ENDPOINT_IN, buf, size, | |
971 | receive_transfer, ctx, timeout); | |
972 | if (libusb_submit_transfer(transfer) != 0) { | |
973 | libusb_free_transfer(transfer); | |
974 | g_free(buf); | |
975 | abort_acquisition(ctx); | |
976 | return SR_ERR; | |
977 | } | |
978 | ctx->transfers[i] = transfer; | |
979 | ctx->submitted_transfers++; | |
980 | } | |
981 | ||
982 | lupfd = libusb_get_pollfds(usb_context); | |
983 | for (i = 0; lupfd[i]; i++) | |
984 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, | |
985 | timeout, receive_data, NULL); | |
986 | free(lupfd); /* NOT g_free()! */ | |
987 | ||
988 | packet.type = SR_DF_HEADER; | |
989 | packet.payload = &header; | |
990 | header.feed_version = 1; | |
991 | gettimeofday(&header.starttime, NULL); | |
992 | sr_session_send(cb_data, &packet); | |
993 | ||
994 | /* Send metadata about the SR_DF_LOGIC packets to come. */ | |
995 | packet.type = SR_DF_META_LOGIC; | |
996 | packet.payload = &meta; | |
997 | meta.samplerate = ctx->cur_samplerate; | |
998 | meta.num_probes = ctx->sample_wide ? 16 : 8; | |
999 | sr_session_send(cb_data, &packet); | |
1000 | ||
1001 | if ((ret = command_start_acquisition (ctx->usb->devhdl, | |
1002 | ctx->cur_samplerate, ctx->sample_wide)) != SR_OK) { | |
1003 | abort_acquisition(ctx); | |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | return SR_OK; | |
1008 | } | |
1009 | ||
1010 | /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */ | |
1011 | static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, | |
1012 | void *cb_data) | |
1013 | { | |
1014 | ||
1015 | /* Avoid compiler warnings. */ | |
1016 | (void)cb_data; | |
1017 | ||
1018 | abort_acquisition(sdi->priv); | |
1019 | ||
1020 | return SR_OK; | |
1021 | } | |
1022 | ||
1023 | SR_PRIV struct sr_dev_driver fx2lafw_driver_info = { | |
1024 | .name = "fx2lafw", | |
1025 | .longname = "fx2lafw (generic driver for FX2 based LAs)", | |
1026 | .api_version = 1, | |
1027 | .init = hw_init, | |
1028 | .cleanup = hw_cleanup, | |
1029 | .scan = hw_scan, | |
1030 | .dev_open = hw_dev_open, | |
1031 | .dev_close = hw_dev_close, | |
1032 | .info_get = hw_info_get, | |
1033 | .dev_status_get = hw_dev_status_get, | |
1034 | .dev_config_set = hw_dev_config_set, | |
1035 | .dev_acquisition_start = hw_dev_acquisition_start, | |
1036 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
1037 | .instances = NULL, | |
1038 | }; |