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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <stdlib.h> | |
21 | #include <sys/time.h> | |
22 | #include <string.h> | |
23 | #include <math.h> | |
24 | #include <glib.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | #include "protocol.h" | |
28 | ||
29 | extern struct sr_dev_driver lascar_el_usb_driver_info; | |
30 | static struct sr_dev_driver *di = &lascar_el_usb_driver_info; | |
31 | ||
32 | static const struct elusb_profile profiles[] = { | |
33 | { 1, "EL-USB-1", LOG_UNSUPPORTED }, | |
34 | { 2, "EL-USB-1", LOG_UNSUPPORTED }, | |
35 | { 3, "EL-USB-2", LOG_TEMP_RH }, | |
36 | { 4, "EL-USB-3", LOG_UNSUPPORTED }, | |
37 | { 5, "EL-USB-4", LOG_UNSUPPORTED }, | |
38 | { 6, "EL-USB-3", LOG_UNSUPPORTED }, | |
39 | { 7, "EL-USB-4", LOG_UNSUPPORTED }, | |
40 | { 8, "EL-USB-LITE", LOG_UNSUPPORTED }, | |
41 | { 9, "EL-USB-CO", LOG_CO }, | |
42 | { 10, "EL-USB-TC", LOG_UNSUPPORTED }, | |
43 | { 11, "EL-USB-CO300", LOG_CO }, | |
44 | { 12, "EL-USB-2-LCD", LOG_TEMP_RH }, | |
45 | { 13, "EL-USB-2+", LOG_TEMP_RH }, | |
46 | { 14, "EL-USB-1-PRO", LOG_UNSUPPORTED }, | |
47 | { 15, "EL-USB-TC-LCD", LOG_UNSUPPORTED }, | |
48 | { 16, "EL-USB-2-LCD+", LOG_TEMP_RH }, | |
49 | { 17, "EL-USB-5", LOG_UNSUPPORTED }, | |
50 | { 18, "EL-USB-1-RCG", LOG_UNSUPPORTED }, | |
51 | { 19, "EL-USB-1-LCD", LOG_UNSUPPORTED }, | |
52 | { 20, "EL-OEM-3", LOG_UNSUPPORTED }, | |
53 | { 21, "EL-USB-1-LCD", LOG_UNSUPPORTED }, | |
54 | { 0, NULL, 0 } | |
55 | }; | |
56 | ||
57 | ||
58 | SR_PRIV libusb_device_handle *lascar_open(struct libusb_device *dev) | |
59 | { | |
60 | libusb_device_handle *dev_hdl; | |
61 | int ret; | |
62 | ||
63 | if ((ret = libusb_open(dev, &dev_hdl)) != 0) { | |
64 | sr_dbg("failed to open device for scan: %s", | |
65 | libusb_error_name(ret)); | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | /* Some of these fail, but it needs doing -- some sort of mode | |
70 | * setup for the SILabs F32x. */ | |
71 | libusb_control_transfer(dev_hdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
72 | 0x00, 0xffff, 0x00, NULL, 0, 50); | |
73 | libusb_control_transfer(dev_hdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
74 | 0x02, 0x0002, 0x00, NULL, 0, 50); | |
75 | libusb_control_transfer(dev_hdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
76 | 0x02, 0x0001, 0x00, NULL, 0, 50); | |
77 | ||
78 | return dev_hdl; | |
79 | } | |
80 | ||
81 | static void mark_xfer(struct libusb_transfer *xfer) | |
82 | { | |
83 | ||
84 | xfer->user_data = GINT_TO_POINTER(1); | |
85 | ||
86 | } | |
87 | ||
88 | SR_PRIV unsigned char *lascar_get_config(libusb_device_handle *dev_hdl) | |
89 | { | |
90 | struct drv_context *drvc; | |
91 | struct libusb_transfer *xfer_in, *xfer_out; | |
92 | struct timeval tv; | |
93 | int64_t start; | |
94 | int buflen; | |
95 | unsigned char cmd[3], buf[256], *config; | |
96 | ||
97 | drvc = di->priv; | |
98 | config = NULL; | |
99 | ||
100 | if (!(xfer_in = libusb_alloc_transfer(0)) || | |
101 | !(xfer_out = libusb_alloc_transfer(0))) | |
102 | return NULL; | |
103 | ||
104 | /* Flush anything the F321 still has queued. */ | |
105 | while (libusb_bulk_transfer(dev_hdl, LASCAR_EP_IN, buf, 256, &buflen, | |
106 | 5) == 0 && buflen > 0) | |
107 | ; | |
108 | ||
109 | /* Keep a read request waiting in the wings, ready to pounce | |
110 | * the moment the device sends something. */ | |
111 | libusb_fill_bulk_transfer(xfer_in, dev_hdl, LASCAR_EP_IN, | |
112 | buf, 256, mark_xfer, 0, 10000); | |
113 | if (libusb_submit_transfer(xfer_in) != 0) | |
114 | goto cleanup; | |
115 | ||
116 | /* Request device configuration structure. */ | |
117 | cmd[0] = 0x00; | |
118 | cmd[1] = 0xff; | |
119 | cmd[2] = 0xff; | |
120 | libusb_fill_bulk_transfer(xfer_out, dev_hdl, LASCAR_EP_OUT, | |
121 | cmd, 3, mark_xfer, 0, 100); | |
122 | if (libusb_submit_transfer(xfer_out) != 0) | |
123 | goto cleanup; | |
124 | ||
125 | tv.tv_sec = 0; | |
126 | tv.tv_usec = 0; | |
127 | start = g_get_monotonic_time(); | |
128 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
129 | if (g_get_monotonic_time() - start > SCAN_TIMEOUT) { | |
130 | start = 0; | |
131 | break; | |
132 | } | |
133 | g_usleep(5000); | |
134 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
135 | } | |
136 | if (!start) { | |
137 | sr_dbg("no response"); | |
138 | goto cleanup; | |
139 | } | |
140 | if (xfer_in->actual_length != 3) { | |
141 | sr_dbg("expected 3-byte header, got %d bytes", xfer_in->actual_length); | |
142 | goto cleanup; | |
143 | } | |
144 | ||
145 | /* Got configuration structure header. */ | |
146 | sr_dbg("response to config request: 0x%.2x 0x%.2x 0x%.2x ", | |
147 | buf[0], buf[1], buf[2]); | |
148 | buflen = buf[1] | (buf[2] << 8); | |
149 | if (buf[0] != 0x02 || buflen > 256) { | |
150 | sr_dbg("Invalid response to config request: " | |
151 | "0x%.2x 0x%.2x 0x%.2x ", buf[0], buf[1], buf[2]); | |
152 | libusb_close(dev_hdl); | |
153 | goto cleanup; | |
154 | } | |
155 | ||
156 | /* Get configuration structure. */ | |
157 | xfer_in->length = buflen; | |
158 | xfer_in->user_data = 0; | |
159 | if (libusb_submit_transfer(xfer_in) != 0) | |
160 | goto cleanup; | |
161 | while (!xfer_in->user_data) { | |
162 | if (g_get_monotonic_time() - start > SCAN_TIMEOUT) { | |
163 | start = 0; | |
164 | break; | |
165 | } | |
166 | g_usleep(5000); | |
167 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
168 | } | |
169 | if (!start) { | |
170 | sr_dbg("Timeout waiting for configuration structure."); | |
171 | goto cleanup; | |
172 | } | |
173 | if (xfer_in->actual_length != buflen) { | |
174 | sr_dbg("expected %d-byte structure, got %d bytes", buflen, | |
175 | xfer_in->actual_length); | |
176 | goto cleanup; | |
177 | } | |
178 | ||
179 | if (!(config = g_try_malloc(256))) | |
180 | return NULL; | |
181 | memcpy(config, buf, buflen); | |
182 | ||
183 | cleanup: | |
184 | if (!xfer_in->user_data || !xfer_in->user_data) { | |
185 | if (!xfer_in->user_data) | |
186 | libusb_cancel_transfer(xfer_in); | |
187 | if (!xfer_out->user_data) | |
188 | libusb_cancel_transfer(xfer_out); | |
189 | start = g_get_monotonic_time(); | |
190 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
191 | if (g_get_monotonic_time() - start > 10000) | |
192 | break; | |
193 | g_usleep(1000); | |
194 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
195 | } | |
196 | } | |
197 | libusb_free_transfer(xfer_in); | |
198 | libusb_free_transfer(xfer_out); | |
199 | ||
200 | return config; | |
201 | } | |
202 | ||
203 | /* Currently unused. */ | |
204 | SR_PRIV int lascar_save_config(libusb_device_handle *dev_hdl, | |
205 | unsigned char *config, int configlen) | |
206 | { | |
207 | struct drv_context *drvc; | |
208 | struct libusb_transfer *xfer_in, *xfer_out; | |
209 | struct timeval tv; | |
210 | int64_t start; | |
211 | int buflen, ret; | |
212 | unsigned char cmd[3], buf[256]; | |
213 | ||
214 | drvc = di->priv; | |
215 | ||
216 | if (!(xfer_in = libusb_alloc_transfer(0)) || | |
217 | !(xfer_out = libusb_alloc_transfer(0))) | |
218 | return SR_ERR; | |
219 | ||
220 | /* Flush anything the F321 still has queued. */ | |
221 | while (libusb_bulk_transfer(dev_hdl, LASCAR_EP_IN, buf, 256, &buflen, | |
222 | 5) == 0 && buflen > 0) | |
223 | ; | |
224 | ret = SR_OK; | |
225 | ||
226 | /* Keep a read request waiting in the wings, ready to pounce | |
227 | * the moment the device sends something. */ | |
228 | libusb_fill_bulk_transfer(xfer_in, dev_hdl, LASCAR_EP_IN, | |
229 | buf, 256, mark_xfer, 0, 10000); | |
230 | if (libusb_submit_transfer(xfer_in) != 0) { | |
231 | ret = SR_ERR; | |
232 | goto cleanup; | |
233 | } | |
234 | ||
235 | /* Request device configuration structure. */ | |
236 | cmd[0] = 0x01; | |
237 | cmd[1] = configlen & 0xff; | |
238 | cmd[2] = (configlen >> 8) & 0xff; | |
239 | libusb_fill_bulk_transfer(xfer_out, dev_hdl, LASCAR_EP_OUT, | |
240 | cmd, 3, mark_xfer, 0, 100); | |
241 | if (libusb_submit_transfer(xfer_out) != 0) { | |
242 | ret = SR_ERR; | |
243 | goto cleanup; | |
244 | } | |
245 | tv.tv_sec = 0; | |
246 | tv.tv_usec = 0; | |
247 | while (!xfer_out->user_data) { | |
248 | g_usleep(5000); | |
249 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
250 | } | |
251 | ||
252 | libusb_fill_bulk_transfer(xfer_out, dev_hdl, LASCAR_EP_OUT, | |
253 | config, configlen, mark_xfer, 0, 100); | |
254 | if (libusb_submit_transfer(xfer_out) != 0) { | |
255 | ret = SR_ERR; | |
256 | goto cleanup; | |
257 | } | |
258 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
259 | g_usleep(5000); | |
260 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
261 | } | |
262 | ||
263 | if (xfer_in->actual_length != 1 || buf[0] != 0xff) { | |
264 | sr_dbg("unexpected response after transfer"); | |
265 | ret = SR_ERR; | |
266 | } | |
267 | ||
268 | cleanup: | |
269 | if (!xfer_in->user_data || !xfer_in->user_data) { | |
270 | if (!xfer_in->user_data) | |
271 | libusb_cancel_transfer(xfer_in); | |
272 | if (!xfer_out->user_data) | |
273 | libusb_cancel_transfer(xfer_out); | |
274 | start = g_get_monotonic_time(); | |
275 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
276 | if (g_get_monotonic_time() - start > 10000) | |
277 | break; | |
278 | g_usleep(1000); | |
279 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
280 | } | |
281 | } | |
282 | libusb_free_transfer(xfer_in); | |
283 | libusb_free_transfer(xfer_out); | |
284 | ||
285 | return ret; | |
286 | } | |
287 | ||
288 | static struct sr_dev_inst *lascar_identify(unsigned char *config) | |
289 | { | |
290 | struct dev_context *devc; | |
291 | const struct elusb_profile *profile; | |
292 | struct sr_dev_inst *sdi; | |
293 | struct sr_probe *probe; | |
294 | int modelid, i; | |
295 | char firmware[5]; | |
296 | ||
297 | modelid = config[0]; | |
298 | sdi = NULL; | |
299 | if (modelid) { | |
300 | profile = NULL; | |
301 | for (i = 0; profiles[i].modelid; i++) { | |
302 | if (profiles[i].modelid == modelid) { | |
303 | profile = &profiles[i]; | |
304 | break; | |
305 | } | |
306 | } | |
307 | if (!profile) { | |
308 | sr_dbg("unknown EL-USB modelid %d", modelid); | |
309 | return NULL; | |
310 | } | |
311 | ||
312 | i = config[52] | (config[53] << 8); | |
313 | memcpy(firmware, config + 0x30, 4); | |
314 | firmware[4] = '\0'; | |
315 | sr_dbg("found %s with firmware version %s serial %d", | |
316 | profile->modelname, firmware, i); | |
317 | ||
318 | if (profile->logformat == LOG_UNSUPPORTED) { | |
319 | sr_dbg("unsupported EL-USB logformat for %s", profile->modelname); | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, LASCAR_VENDOR, | |
324 | profile->modelname, firmware))) | |
325 | return NULL; | |
326 | sdi->driver = di; | |
327 | ||
328 | if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1"))) | |
329 | return NULL; | |
330 | sdi->probes = g_slist_append(NULL, probe); | |
331 | ||
332 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) | |
333 | return NULL; | |
334 | sdi->priv = devc; | |
335 | devc->profile = profile; | |
336 | } | |
337 | ||
338 | return sdi; | |
339 | } | |
340 | ||
341 | SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address) | |
342 | { | |
343 | struct drv_context *drvc; | |
344 | struct sr_dev_inst *sdi; | |
345 | struct libusb_device **devlist; | |
346 | struct libusb_device_descriptor des; | |
347 | libusb_device_handle *dev_hdl; | |
348 | int ret, i; | |
349 | unsigned char *config; | |
350 | ||
351 | drvc = di->priv; | |
352 | sdi = NULL; | |
353 | ||
354 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
355 | for (i = 0; devlist[i]; i++) { | |
356 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
357 | sr_err("Failed to get device descriptor: %d.", ret); | |
358 | continue; | |
359 | } | |
360 | ||
361 | if (libusb_get_bus_number(devlist[i]) != bus || | |
362 | libusb_get_device_address(devlist[i]) != address) | |
363 | continue; | |
364 | ||
365 | if (!(dev_hdl = lascar_open(devlist[i]))) | |
366 | continue; | |
367 | ||
368 | if (!(config = lascar_get_config(dev_hdl))) | |
369 | continue; | |
370 | ||
371 | libusb_close(dev_hdl); | |
372 | sdi = lascar_identify(config); | |
373 | g_free(config); | |
374 | } | |
375 | ||
376 | return sdi; | |
377 | } | |
378 | ||
379 | static void lascar_el_usb_dispatch(struct sr_dev_inst *sdi, unsigned char *buf, | |
380 | int buflen) | |
381 | { | |
382 | struct dev_context *devc; | |
383 | struct sr_datafeed_packet packet; | |
384 | struct sr_datafeed_analog analog; | |
385 | float *temp, *rh; | |
386 | uint16_t s; | |
387 | int samples, samples_left, i, j; | |
388 | ||
389 | devc = sdi->priv; | |
390 | samples = buflen / devc->sample_size; | |
391 | samples_left = devc->logged_samples - devc->rcvd_samples; | |
392 | if (samples_left < samples) | |
393 | samples = samples_left; | |
394 | switch (devc->profile->logformat) { | |
395 | case LOG_TEMP_RH: | |
396 | packet.type = SR_DF_ANALOG; | |
397 | packet.payload = &analog; | |
398 | analog.mqflags = 0; | |
399 | if (!(temp = g_try_malloc(sizeof(float) * samples))) | |
400 | break; | |
401 | if (!(rh = g_try_malloc(sizeof(float) * samples))) | |
402 | break; | |
403 | for (i = 0, j = 0; i < samples; i++) { | |
404 | /* Both Celcius and Fahrenheit stored at base -40. */ | |
405 | if (devc->temp_unit == 0) | |
406 | /* Celcius is stored in half-degree increments. */ | |
407 | temp[j] = buf[i * 2] / 2 - 40; | |
408 | else | |
409 | temp[j] = buf[i * 2] - 40; | |
410 | ||
411 | rh[j] = buf[i * 2 + 1] / 2; | |
412 | ||
413 | if (temp[j] == 0.0 && rh[j] == 0.0) | |
414 | /* Skip invalid measurement. */ | |
415 | continue; | |
416 | j++; | |
417 | } | |
418 | analog.num_samples = j; | |
419 | ||
420 | analog.mq = SR_MQ_TEMPERATURE; | |
421 | if (devc->temp_unit == 1) | |
422 | analog.unit = SR_UNIT_FAHRENHEIT; | |
423 | else | |
424 | analog.unit = SR_UNIT_CELSIUS; | |
425 | analog.data = temp; | |
426 | sr_session_send(devc->cb_data, &packet); | |
427 | ||
428 | analog.mq = SR_MQ_RELATIVE_HUMIDITY; | |
429 | analog.unit = SR_UNIT_PERCENTAGE; | |
430 | analog.data = rh; | |
431 | sr_session_send(devc->cb_data, &packet); | |
432 | g_free(temp); | |
433 | g_free(rh); | |
434 | break; | |
435 | case LOG_CO: | |
436 | packet.type = SR_DF_ANALOG; | |
437 | packet.payload = &analog; | |
438 | analog.num_samples = samples; | |
439 | analog.mq = SR_MQ_CARBON_MONOXIDE; | |
440 | analog.unit = SR_UNIT_CONCENTRATION; | |
441 | analog.mqflags = 0; | |
442 | if (!(analog.data = g_try_malloc(sizeof(float) * samples))) | |
443 | break; | |
444 | for (i = 0; i < samples; i++) { | |
445 | s = (buf[i * 2] << 8) | buf[i * 2 + 1]; | |
446 | analog.data[i] = (s * devc->co_high + devc->co_low) / 1000000; | |
447 | if (analog.data[i] < 0.0) | |
448 | analog.data[i] = 0.0; | |
449 | } | |
450 | sr_session_send(devc->cb_data, &packet); | |
451 | g_free(analog.data); | |
452 | break; | |
453 | default: | |
454 | /* How did we even get this far? */ | |
455 | break; | |
456 | } | |
457 | devc->rcvd_samples += samples; | |
458 | ||
459 | } | |
460 | ||
461 | SR_PRIV int lascar_el_usb_handle_events(int fd, int revents, void *cb_data) | |
462 | { | |
463 | struct dev_context *devc; | |
464 | struct drv_context *drvc = di->priv; | |
465 | struct sr_datafeed_packet packet; | |
466 | struct sr_dev_inst *sdi; | |
467 | struct timeval tv; | |
468 | int i; | |
469 | ||
470 | (void)fd; | |
471 | (void)revents; | |
472 | ||
473 | sdi = cb_data; | |
474 | devc = sdi->priv; | |
475 | ||
476 | if (sdi->status == SR_ST_STOPPING) { | |
477 | for (i = 0; devc->usbfd[i] != -1; i++) | |
478 | sr_source_remove(devc->usbfd[i]); | |
479 | ||
480 | sdi->driver->dev_close(sdi); | |
481 | ||
482 | packet.type = SR_DF_END; | |
483 | sr_session_send(cb_data, &packet); | |
484 | } | |
485 | ||
486 | memset(&tv, 0, sizeof(struct timeval)); | |
487 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
488 | NULL); | |
489 | ||
490 | return TRUE; | |
491 | } | |
492 | ||
493 | SR_PRIV void lascar_el_usb_receive_transfer(struct libusb_transfer *transfer) | |
494 | { | |
495 | struct dev_context *devc; | |
496 | struct sr_dev_inst *sdi; | |
497 | int ret; | |
498 | gboolean packet_has_error; | |
499 | ||
500 | sdi = transfer->user_data; | |
501 | devc = sdi->priv; | |
502 | ||
503 | packet_has_error = FALSE; | |
504 | switch (transfer->status) { | |
505 | case LIBUSB_TRANSFER_NO_DEVICE: | |
506 | /* USB device was unplugged. */ | |
507 | hw_dev_acquisition_stop(sdi, sdi); | |
508 | return; | |
509 | case LIBUSB_TRANSFER_COMPLETED: | |
510 | case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */ | |
511 | break; | |
512 | default: | |
513 | packet_has_error = TRUE; | |
514 | break; | |
515 | } | |
516 | ||
517 | if (!packet_has_error) { | |
518 | if (devc->rcvd_samples < devc->logged_samples) | |
519 | lascar_el_usb_dispatch(sdi, transfer->buffer, | |
520 | transfer->actual_length); | |
521 | devc->rcvd_bytes += transfer->actual_length; | |
522 | sr_spew("received %d/%d bytes (%d/%d samples)", | |
523 | devc->rcvd_bytes, devc->log_size, | |
524 | devc->rcvd_samples, devc->logged_samples); | |
525 | if (devc->rcvd_bytes >= devc->log_size) | |
526 | hw_dev_acquisition_stop(sdi, sdi); | |
527 | } | |
528 | ||
529 | if (sdi->status == SR_ST_ACTIVE) { | |
530 | /* Send the same request again. */ | |
531 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
532 | sr_err("Unable to resubmit transfer: %s.", | |
533 | libusb_error_name(ret)); | |
534 | g_free(transfer->buffer); | |
535 | libusb_free_transfer(transfer); | |
536 | hw_dev_acquisition_stop(sdi, sdi); | |
537 | } | |
538 | } else { | |
539 | /* This was the last transfer we're going to receive, so | |
540 | * clean up now. */ | |
541 | g_free(transfer->buffer); | |
542 | libusb_free_transfer(transfer); | |
543 | } | |
544 | ||
545 | } |