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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 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 <string.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | #define SERIALCOMM "115200/8n1" | |
24 | ||
25 | SR_PRIV struct sr_dev_driver testo_driver_info; | |
26 | static struct sr_dev_driver *di = &testo_driver_info; | |
27 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
28 | ||
29 | static const int32_t scanopts[] = { | |
30 | SR_CONF_CONN, | |
31 | }; | |
32 | ||
33 | static const int32_t devopts[] = { | |
34 | SR_CONF_MULTIMETER, | |
35 | SR_CONF_LIMIT_MSEC, | |
36 | SR_CONF_LIMIT_SAMPLES, | |
37 | SR_CONF_CONTINUOUS, | |
38 | }; | |
39 | ||
40 | unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 }; | |
41 | struct testo_model models[] = { | |
42 | { "435", 9, TESTO_x35_REQUEST }, | |
43 | }; | |
44 | ||
45 | static int init(struct sr_context *sr_ctx) | |
46 | { | |
47 | return std_init(sr_ctx, di, LOG_PREFIX); | |
48 | } | |
49 | ||
50 | static GSList *scan(GSList *options) | |
51 | { | |
52 | struct drv_context *drvc; | |
53 | struct dev_context *devc; | |
54 | struct sr_config *src; | |
55 | struct sr_dev_inst *sdi; | |
56 | struct sr_usb_dev_inst *usb; | |
57 | struct libusb_device_descriptor des; | |
58 | libusb_device **devlist; | |
59 | struct libusb_device_handle *hdl; | |
60 | GSList *conn_devices, *devices, *l; | |
61 | int devcnt, ret, i; | |
62 | const char *str; | |
63 | char manufacturer[64], product[64]; | |
64 | ||
65 | devices = NULL; | |
66 | drvc = di->priv; | |
67 | drvc->instances = NULL; | |
68 | ||
69 | conn_devices = NULL; | |
70 | for (l = options; l; l = l->next) { | |
71 | src = l->data; | |
72 | if (src->key != SR_CONF_CONN) | |
73 | continue; | |
74 | str = g_variant_get_string(src->data, NULL); | |
75 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str); | |
76 | } | |
77 | ||
78 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
79 | for (i = 0; devlist[i]; i++) { | |
80 | if (conn_devices) { | |
81 | usb = NULL; | |
82 | for (l = conn_devices; l; l = l->next) { | |
83 | usb = l->data; | |
84 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
85 | && usb->address == libusb_get_device_address(devlist[i])) | |
86 | break; | |
87 | } | |
88 | if (!l) | |
89 | /* This device matched none of the ones that | |
90 | * matched the conn specification. */ | |
91 | continue; | |
92 | } | |
93 | ||
94 | if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) { | |
95 | sr_warn("Failed to get device descriptor: %s.", | |
96 | libusb_error_name(ret)); | |
97 | continue; | |
98 | } | |
99 | ||
100 | if ((ret = libusb_open(devlist[i], &hdl)) < 0) | |
101 | continue; | |
102 | ||
103 | manufacturer[0] = product[0] = '\0'; | |
104 | if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii( | |
105 | hdl, des.iManufacturer, (unsigned char *) manufacturer, | |
106 | sizeof(manufacturer))) < 0) { | |
107 | sr_warn("Failed to get manufacturer string descriptor: %s.", | |
108 | libusb_error_name(ret)); | |
109 | } | |
110 | if (des.iProduct && (ret = libusb_get_string_descriptor_ascii( | |
111 | hdl, des.iProduct, (unsigned char *) product, | |
112 | sizeof(product))) < 0) { | |
113 | sr_warn("Failed to get product string descriptor: %s.", | |
114 | libusb_error_name(ret)); | |
115 | } | |
116 | libusb_close(hdl); | |
117 | ||
118 | if (strncmp(manufacturer, "testo", 5)) | |
119 | continue; | |
120 | ||
121 | /* Hardcode the 435 for now.*/ | |
122 | if (strcmp(product, "testo 435/635/735")) | |
123 | continue; | |
124 | ||
125 | devcnt = g_slist_length(drvc->instances); | |
126 | sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE, "Testo", | |
127 | "435/635/735", NULL); | |
128 | sdi->driver = di; | |
129 | sdi->inst_type = SR_INST_USB; | |
130 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
131 | libusb_get_device_address(devlist[i]), NULL); | |
132 | devc = g_malloc(sizeof(struct dev_context)); | |
133 | devc->model = &models[0]; | |
134 | devc->limit_msec = 0; | |
135 | devc->limit_samples = 0; | |
136 | sdi->priv = devc; | |
137 | if (testo_probe_channels(sdi) != SR_OK) | |
138 | continue; | |
139 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
140 | devices = g_slist_append(devices, sdi); | |
141 | } | |
142 | libusb_free_device_list(devlist, 1); | |
143 | g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free); | |
144 | ||
145 | return devices; | |
146 | } | |
147 | ||
148 | static GSList *dev_list(void) | |
149 | { | |
150 | return ((struct drv_context *)(di->priv))->instances; | |
151 | } | |
152 | ||
153 | static int dev_clear(void) | |
154 | { | |
155 | return std_dev_clear(di, NULL); | |
156 | } | |
157 | ||
158 | static int dev_open(struct sr_dev_inst *sdi) | |
159 | { | |
160 | struct drv_context *drvc = di->priv; | |
161 | struct sr_usb_dev_inst *usb; | |
162 | libusb_device **devlist; | |
163 | int ret, i; | |
164 | ||
165 | if (!di->priv) { | |
166 | sr_err("Driver was not initialized."); | |
167 | return SR_ERR; | |
168 | } | |
169 | ||
170 | usb = sdi->conn; | |
171 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
172 | for (i = 0; devlist[i]; i++) { | |
173 | if (libusb_get_bus_number(devlist[i]) != usb->bus | |
174 | || libusb_get_device_address(devlist[i]) != usb->address) | |
175 | continue; | |
176 | if ((ret = libusb_open(devlist[i], &usb->devhdl))) { | |
177 | sr_err("Failed to open device: %s.", libusb_error_name(ret)); | |
178 | return SR_ERR; | |
179 | } | |
180 | break; | |
181 | } | |
182 | libusb_free_device_list(devlist, 1); | |
183 | if (!devlist[i]) { | |
184 | sr_err("Device not found."); | |
185 | return SR_ERR; | |
186 | } | |
187 | ||
188 | if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) { | |
189 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
190 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
191 | sr_err("Failed to detach kernel driver: %s.", | |
192 | libusb_error_name(ret)); | |
193 | return SR_ERR; | |
194 | } | |
195 | } | |
196 | } | |
197 | ||
198 | if ((ret = libusb_claim_interface(usb->devhdl, 0))) { | |
199 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
200 | return SR_ERR; | |
201 | } | |
202 | sdi->status = SR_ST_ACTIVE; | |
203 | ||
204 | return SR_OK; | |
205 | } | |
206 | ||
207 | static int dev_close(struct sr_dev_inst *sdi) | |
208 | { | |
209 | struct sr_usb_dev_inst *usb; | |
210 | ||
211 | if (!di->priv) { | |
212 | sr_err("Driver was not initialized."); | |
213 | return SR_ERR; | |
214 | } | |
215 | ||
216 | usb = sdi->conn; | |
217 | if (!usb->devhdl) | |
218 | /* Nothing to do. */ | |
219 | return SR_OK; | |
220 | ||
221 | libusb_release_interface(usb->devhdl, 0); | |
222 | libusb_close(usb->devhdl); | |
223 | usb->devhdl = NULL; | |
224 | sdi->status = SR_ST_INACTIVE; | |
225 | ||
226 | return SR_OK; | |
227 | } | |
228 | ||
229 | static int cleanup(void) | |
230 | { | |
231 | int ret; | |
232 | struct drv_context *drvc; | |
233 | ||
234 | if (!(drvc = di->priv)) | |
235 | return SR_OK; | |
236 | ||
237 | ret = dev_clear(); | |
238 | g_free(drvc); | |
239 | di->priv = NULL; | |
240 | ||
241 | return ret; | |
242 | } | |
243 | ||
244 | static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
245 | const struct sr_channel_group *cg) | |
246 | { | |
247 | struct sr_usb_dev_inst *usb; | |
248 | char str[128]; | |
249 | ||
250 | (void)cg; | |
251 | ||
252 | switch (key) { | |
253 | case SR_CONF_CONN: | |
254 | if (!sdi || !sdi->conn) | |
255 | return SR_ERR_ARG; | |
256 | usb = sdi->conn; | |
257 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
258 | *data = g_variant_new_string(str); | |
259 | break; | |
260 | default: | |
261 | return SR_ERR_NA; | |
262 | } | |
263 | ||
264 | return SR_OK; | |
265 | } | |
266 | ||
267 | static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi, | |
268 | const struct sr_channel_group *cg) | |
269 | { | |
270 | struct dev_context *devc; | |
271 | gint64 now; | |
272 | int ret; | |
273 | ||
274 | (void)cg; | |
275 | ||
276 | if (sdi->status != SR_ST_ACTIVE) | |
277 | return SR_ERR_DEV_CLOSED; | |
278 | ||
279 | if (!di->priv) { | |
280 | sr_err("Driver was not initialized."); | |
281 | return SR_ERR; | |
282 | } | |
283 | ||
284 | devc = sdi->priv; | |
285 | ret = SR_OK; | |
286 | switch (key) { | |
287 | case SR_CONF_LIMIT_MSEC: | |
288 | devc->limit_msec = g_variant_get_uint64(data); | |
289 | now = g_get_monotonic_time() / 1000; | |
290 | devc->end_time = now + devc->limit_msec; | |
291 | sr_dbg("Setting time limit to %" PRIu64 "ms.", | |
292 | devc->limit_msec); | |
293 | break; | |
294 | case SR_CONF_LIMIT_SAMPLES: | |
295 | devc->limit_samples = g_variant_get_uint64(data); | |
296 | sr_dbg("Setting sample limit to %" PRIu64 ".", | |
297 | devc->limit_samples); | |
298 | break; | |
299 | default: | |
300 | ret = SR_ERR_NA; | |
301 | } | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
307 | const struct sr_channel_group *cg) | |
308 | { | |
309 | (void)sdi; | |
310 | (void)cg; | |
311 | ||
312 | switch (key) { | |
313 | case SR_CONF_SCAN_OPTIONS: | |
314 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
315 | scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t)); | |
316 | break; | |
317 | case SR_CONF_DEVICE_OPTIONS: | |
318 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
319 | devopts, ARRAY_SIZE(devopts), sizeof(int32_t)); | |
320 | break; | |
321 | default: | |
322 | return SR_ERR_NA; | |
323 | } | |
324 | ||
325 | return SR_OK; | |
326 | } | |
327 | ||
328 | static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len) | |
329 | { | |
330 | struct dev_context *devc; | |
331 | int packet_size; | |
332 | uint16_t crc; | |
333 | ||
334 | devc = sdi->priv; | |
335 | ||
336 | if (devc->reply_size + len > MAX_REPLY_SIZE) { | |
337 | /* Something went very wrong. */ | |
338 | sr_dbg("Receive buffer overrun."); | |
339 | devc->reply_size = 0; | |
340 | return; | |
341 | } | |
342 | ||
343 | memcpy(devc->reply + devc->reply_size, data, len); | |
344 | devc->reply_size += len; | |
345 | /* Sixth byte contains the length of the packet. */ | |
346 | if (devc->reply_size < 7) | |
347 | return; | |
348 | ||
349 | packet_size = 7 + devc->reply[6] * 7 + 2; | |
350 | if (devc->reply_size < packet_size) | |
351 | return; | |
352 | ||
353 | if (!testo_check_packet_prefix(devc->reply, devc->reply_size)) | |
354 | return; | |
355 | ||
356 | crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2); | |
357 | if (crc == RL16(&devc->reply[devc->reply_size - 2])) { | |
358 | testo_receive_packet(sdi); | |
359 | devc->num_samples++; | |
360 | } else { | |
361 | sr_dbg("Packet has invalid CRC."); | |
362 | } | |
363 | ||
364 | devc->reply_size = 0; | |
365 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) | |
366 | dev_acquisition_stop(sdi, devc->cb_data); | |
367 | else | |
368 | testo_request_packet(sdi); | |
369 | ||
370 | } | |
371 | ||
372 | SR_PRIV void receive_transfer(struct libusb_transfer *transfer) | |
373 | { | |
374 | struct dev_context *devc; | |
375 | struct sr_dev_inst *sdi; | |
376 | int ret; | |
377 | ||
378 | sdi = transfer->user_data; | |
379 | devc = sdi->priv; | |
380 | if (transfer == devc->out_transfer) | |
381 | /* Just the command acknowledgement. */ | |
382 | return; | |
383 | ||
384 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
385 | /* USB device was unplugged. */ | |
386 | dev_acquisition_stop(sdi, devc->cb_data); | |
387 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
388 | /* First two bytes in any transfer are FTDI status bytes. */ | |
389 | if (transfer->actual_length > 2) | |
390 | receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2); | |
391 | } | |
392 | /* Anything else is either an error or a timeout, which is fine: | |
393 | * we were just going to send another transfer request anyway. */ | |
394 | ||
395 | if (sdi->status == SR_ST_ACTIVE) { | |
396 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
397 | sr_err("Unable to resubmit transfer: %s.", | |
398 | libusb_error_name(ret)); | |
399 | g_free(transfer->buffer); | |
400 | libusb_free_transfer(transfer); | |
401 | dev_acquisition_stop(sdi, devc->cb_data); | |
402 | } | |
403 | } else { | |
404 | /* This was the last transfer we're going to receive, so | |
405 | * clean up now. */ | |
406 | g_free(transfer->buffer); | |
407 | libusb_free_transfer(transfer); | |
408 | } | |
409 | } | |
410 | ||
411 | static int handle_events(int fd, int revents, void *cb_data) | |
412 | { | |
413 | struct dev_context *devc; | |
414 | struct drv_context *drvc = di->priv; | |
415 | struct sr_datafeed_packet packet; | |
416 | struct sr_dev_inst *sdi; | |
417 | struct timeval tv; | |
418 | gint64 now; | |
419 | ||
420 | (void)fd; | |
421 | (void)revents; | |
422 | ||
423 | sdi = cb_data; | |
424 | devc = sdi->priv; | |
425 | ||
426 | if (devc->limit_msec) { | |
427 | now = g_get_monotonic_time() / 1000; | |
428 | if (now > devc->end_time) | |
429 | dev_acquisition_stop(sdi, devc->cb_data); | |
430 | } | |
431 | ||
432 | if (sdi->status == SR_ST_STOPPING) { | |
433 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
434 | ||
435 | dev_close(sdi); | |
436 | ||
437 | packet.type = SR_DF_END; | |
438 | sr_session_send(sdi, &packet); | |
439 | } | |
440 | ||
441 | memset(&tv, 0, sizeof(struct timeval)); | |
442 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
443 | NULL); | |
444 | ||
445 | return TRUE; | |
446 | } | |
447 | ||
448 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
449 | { | |
450 | struct drv_context *drvc; | |
451 | struct dev_context *devc; | |
452 | struct sr_usb_dev_inst *usb; | |
453 | struct libusb_transfer *transfer; | |
454 | int ret; | |
455 | unsigned char *buf; | |
456 | ||
457 | drvc = di->priv; | |
458 | if (sdi->status != SR_ST_ACTIVE) | |
459 | return SR_ERR_DEV_CLOSED; | |
460 | ||
461 | if (!di->priv) { | |
462 | sr_err("Driver was not initialized."); | |
463 | return SR_ERR; | |
464 | } | |
465 | ||
466 | devc = sdi->priv; | |
467 | usb = sdi->conn; | |
468 | devc->cb_data = cb_data; | |
469 | devc->end_time = 0; | |
470 | devc->num_samples = 0; | |
471 | devc->reply_size = 0; | |
472 | ||
473 | /* Send header packet to the session bus. */ | |
474 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
475 | ||
476 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
477 | handle_events, (void *)sdi); | |
478 | ||
479 | if (testo_set_serial_params(usb) != SR_OK) | |
480 | return SR_ERR; | |
481 | ||
482 | devc->out_transfer = libusb_alloc_transfer(0); | |
483 | if (testo_request_packet(sdi) != SR_OK) | |
484 | return SR_ERR; | |
485 | ||
486 | buf = g_try_malloc(MAX_REPLY_SIZE); | |
487 | transfer = libusb_alloc_transfer(0); | |
488 | libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf, | |
489 | MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100); | |
490 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
491 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
492 | libusb_free_transfer(transfer); | |
493 | g_free(buf); | |
494 | return SR_ERR; | |
495 | } | |
496 | devc->reply_size = 0; | |
497 | ||
498 | return SR_OK; | |
499 | } | |
500 | ||
501 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
502 | { | |
503 | (void)cb_data; | |
504 | ||
505 | if (!di->priv) { | |
506 | sr_err("Driver was not initialized."); | |
507 | return SR_ERR; | |
508 | } | |
509 | ||
510 | if (sdi->status != SR_ST_ACTIVE) | |
511 | return SR_ERR_DEV_CLOSED; | |
512 | ||
513 | sdi->status = SR_ST_STOPPING; | |
514 | ||
515 | return SR_OK; | |
516 | } | |
517 | ||
518 | SR_PRIV struct sr_dev_driver testo_driver_info = { | |
519 | .name = "testo", | |
520 | .longname = "Testo", | |
521 | .api_version = 1, | |
522 | .init = init, | |
523 | .cleanup = cleanup, | |
524 | .scan = scan, | |
525 | .dev_list = dev_list, | |
526 | .dev_clear = dev_clear, | |
527 | .config_get = config_get, | |
528 | .config_set = config_set, | |
529 | .config_list = config_list, | |
530 | .dev_open = dev_open, | |
531 | .dev_close = dev_close, | |
532 | .dev_acquisition_start = dev_acquisition_start, | |
533 | .dev_acquisition_stop = dev_acquisition_stop, | |
534 | .priv = NULL, | |
535 | }; |