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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 int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
27 | ||
28 | static const uint32_t scanopts[] = { | |
29 | SR_CONF_CONN, | |
30 | }; | |
31 | ||
32 | static const uint32_t devopts[] = { | |
33 | SR_CONF_MULTIMETER, | |
34 | SR_CONF_CONTINUOUS, | |
35 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
36 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
37 | }; | |
38 | ||
39 | unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 }; | |
40 | struct testo_model models[] = { | |
41 | { "435", 9, TESTO_x35_REQUEST }, | |
42 | }; | |
43 | ||
44 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
45 | { | |
46 | return std_init(sr_ctx, di, LOG_PREFIX); | |
47 | } | |
48 | ||
49 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
50 | { | |
51 | struct drv_context *drvc; | |
52 | struct dev_context *devc; | |
53 | struct sr_config *src; | |
54 | struct sr_dev_inst *sdi; | |
55 | struct sr_usb_dev_inst *usb; | |
56 | struct libusb_device_descriptor des; | |
57 | libusb_device **devlist; | |
58 | struct libusb_device_handle *hdl; | |
59 | GSList *conn_devices, *devices, *l; | |
60 | int ret, i; | |
61 | const char *str; | |
62 | char manufacturer[64], product[64], connection_id[64]; | |
63 | ||
64 | devices = NULL; | |
65 | drvc = di->priv; | |
66 | drvc->instances = NULL; | |
67 | ||
68 | conn_devices = NULL; | |
69 | for (l = options; l; l = l->next) { | |
70 | src = l->data; | |
71 | if (src->key != SR_CONF_CONN) | |
72 | continue; | |
73 | str = g_variant_get_string(src->data, NULL); | |
74 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str); | |
75 | } | |
76 | ||
77 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
78 | for (i = 0; devlist[i]; i++) { | |
79 | if (conn_devices) { | |
80 | usb = NULL; | |
81 | for (l = conn_devices; l; l = l->next) { | |
82 | usb = l->data; | |
83 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
84 | && usb->address == libusb_get_device_address(devlist[i])) | |
85 | break; | |
86 | } | |
87 | if (!l) | |
88 | /* This device matched none of the ones that | |
89 | * matched the conn specification. */ | |
90 | continue; | |
91 | } | |
92 | ||
93 | if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) { | |
94 | sr_warn("Failed to get device descriptor: %s.", | |
95 | libusb_error_name(ret)); | |
96 | continue; | |
97 | } | |
98 | ||
99 | if ((ret = libusb_open(devlist[i], &hdl)) < 0) | |
100 | continue; | |
101 | ||
102 | manufacturer[0] = product[0] = '\0'; | |
103 | if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii( | |
104 | hdl, des.iManufacturer, (unsigned char *) manufacturer, | |
105 | sizeof(manufacturer))) < 0) { | |
106 | sr_warn("Failed to get manufacturer string descriptor: %s.", | |
107 | libusb_error_name(ret)); | |
108 | } | |
109 | if (des.iProduct && (ret = libusb_get_string_descriptor_ascii( | |
110 | hdl, des.iProduct, (unsigned char *) product, | |
111 | sizeof(product))) < 0) { | |
112 | sr_warn("Failed to get product string descriptor: %s.", | |
113 | libusb_error_name(ret)); | |
114 | } | |
115 | libusb_close(hdl); | |
116 | ||
117 | if (strncmp(manufacturer, "testo", 5)) | |
118 | continue; | |
119 | ||
120 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
121 | ||
122 | /* Hardcode the 435 for now.*/ | |
123 | if (strcmp(product, "testo 435/635/735")) | |
124 | continue; | |
125 | ||
126 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
127 | sdi->status = SR_ST_INACTIVE; | |
128 | sdi->vendor = g_strdup("Testo"); | |
129 | sdi->model = g_strdup("435/635/735"); | |
130 | sdi->driver = di; | |
131 | sdi->inst_type = SR_INST_USB; | |
132 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
133 | libusb_get_device_address(devlist[i]), NULL); | |
134 | sdi->connection_id = g_strdup(connection_id); | |
135 | devc = g_malloc(sizeof(struct dev_context)); | |
136 | devc->model = &models[0]; | |
137 | devc->limit_msec = 0; | |
138 | devc->limit_samples = 0; | |
139 | sdi->priv = devc; | |
140 | if (testo_probe_channels(sdi) != SR_OK) | |
141 | continue; | |
142 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
143 | devices = g_slist_append(devices, sdi); | |
144 | } | |
145 | libusb_free_device_list(devlist, 1); | |
146 | g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free); | |
147 | ||
148 | return devices; | |
149 | } | |
150 | ||
151 | static GSList *dev_list(const struct sr_dev_driver *di) | |
152 | { | |
153 | return ((struct drv_context *)(di->priv))->instances; | |
154 | } | |
155 | ||
156 | static int dev_clear(const struct sr_dev_driver *di) | |
157 | { | |
158 | return std_dev_clear(di, NULL); | |
159 | } | |
160 | ||
161 | static int dev_open(struct sr_dev_inst *sdi) | |
162 | { | |
163 | struct sr_dev_driver *di = sdi->driver; | |
164 | struct drv_context *drvc = di->priv; | |
165 | struct sr_usb_dev_inst *usb; | |
166 | libusb_device **devlist; | |
167 | int ret, i; | |
168 | char connection_id[64]; | |
169 | ||
170 | if (!di->priv) { | |
171 | sr_err("Driver was not initialized."); | |
172 | return SR_ERR; | |
173 | } | |
174 | ||
175 | usb = sdi->conn; | |
176 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
177 | for (i = 0; devlist[i]; i++) { | |
178 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
179 | if (strcmp(sdi->connection_id, connection_id)) | |
180 | continue; | |
181 | if ((ret = libusb_open(devlist[i], &usb->devhdl))) { | |
182 | sr_err("Failed to open device: %s.", libusb_error_name(ret)); | |
183 | return SR_ERR; | |
184 | } | |
185 | break; | |
186 | } | |
187 | libusb_free_device_list(devlist, 1); | |
188 | if (!devlist[i]) { | |
189 | sr_err("Device not found."); | |
190 | return SR_ERR; | |
191 | } | |
192 | ||
193 | if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) { | |
194 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
195 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
196 | sr_err("Failed to detach kernel driver: %s.", | |
197 | libusb_error_name(ret)); | |
198 | return SR_ERR; | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | if ((ret = libusb_claim_interface(usb->devhdl, 0))) { | |
204 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
205 | return SR_ERR; | |
206 | } | |
207 | sdi->status = SR_ST_ACTIVE; | |
208 | ||
209 | return SR_OK; | |
210 | } | |
211 | ||
212 | static int dev_close(struct sr_dev_inst *sdi) | |
213 | { | |
214 | struct sr_dev_driver *di = sdi->driver; | |
215 | struct sr_usb_dev_inst *usb; | |
216 | ||
217 | if (!di->priv) { | |
218 | sr_err("Driver was not initialized."); | |
219 | return SR_ERR; | |
220 | } | |
221 | ||
222 | usb = sdi->conn; | |
223 | if (!usb->devhdl) | |
224 | /* Nothing to do. */ | |
225 | return SR_OK; | |
226 | ||
227 | libusb_release_interface(usb->devhdl, 0); | |
228 | libusb_close(usb->devhdl); | |
229 | usb->devhdl = NULL; | |
230 | sdi->status = SR_ST_INACTIVE; | |
231 | ||
232 | return SR_OK; | |
233 | } | |
234 | ||
235 | static int cleanup(const struct sr_dev_driver *di) | |
236 | { | |
237 | int ret; | |
238 | struct drv_context *drvc; | |
239 | ||
240 | if (!(drvc = di->priv)) | |
241 | return SR_OK; | |
242 | ||
243 | ret = dev_clear(di); | |
244 | g_free(drvc); | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
250 | const struct sr_channel_group *cg) | |
251 | { | |
252 | struct sr_usb_dev_inst *usb; | |
253 | char str[128]; | |
254 | ||
255 | (void)cg; | |
256 | ||
257 | switch (key) { | |
258 | case SR_CONF_CONN: | |
259 | if (!sdi || !sdi->conn) | |
260 | return SR_ERR_ARG; | |
261 | usb = sdi->conn; | |
262 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
263 | *data = g_variant_new_string(str); | |
264 | break; | |
265 | default: | |
266 | return SR_ERR_NA; | |
267 | } | |
268 | ||
269 | return SR_OK; | |
270 | } | |
271 | ||
272 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
273 | const struct sr_channel_group *cg) | |
274 | { | |
275 | struct sr_dev_driver *di = sdi->driver; | |
276 | struct dev_context *devc; | |
277 | gint64 now; | |
278 | int ret; | |
279 | ||
280 | (void)cg; | |
281 | ||
282 | if (sdi->status != SR_ST_ACTIVE) | |
283 | return SR_ERR_DEV_CLOSED; | |
284 | ||
285 | if (!di->priv) { | |
286 | sr_err("Driver was not initialized."); | |
287 | return SR_ERR; | |
288 | } | |
289 | ||
290 | devc = sdi->priv; | |
291 | ret = SR_OK; | |
292 | switch (key) { | |
293 | case SR_CONF_LIMIT_MSEC: | |
294 | devc->limit_msec = g_variant_get_uint64(data); | |
295 | now = g_get_monotonic_time() / 1000; | |
296 | devc->end_time = now + devc->limit_msec; | |
297 | sr_dbg("Setting time limit to %" PRIu64 "ms.", | |
298 | devc->limit_msec); | |
299 | break; | |
300 | case SR_CONF_LIMIT_SAMPLES: | |
301 | devc->limit_samples = g_variant_get_uint64(data); | |
302 | sr_dbg("Setting sample limit to %" PRIu64 ".", | |
303 | devc->limit_samples); | |
304 | break; | |
305 | default: | |
306 | ret = SR_ERR_NA; | |
307 | } | |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
312 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
313 | const struct sr_channel_group *cg) | |
314 | { | |
315 | (void)sdi; | |
316 | (void)cg; | |
317 | ||
318 | switch (key) { | |
319 | case SR_CONF_SCAN_OPTIONS: | |
320 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
321 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
322 | break; | |
323 | case SR_CONF_DEVICE_OPTIONS: | |
324 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
325 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
326 | break; | |
327 | default: | |
328 | return SR_ERR_NA; | |
329 | } | |
330 | ||
331 | return SR_OK; | |
332 | } | |
333 | ||
334 | static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len) | |
335 | { | |
336 | struct dev_context *devc; | |
337 | int packet_size; | |
338 | uint16_t crc; | |
339 | ||
340 | devc = sdi->priv; | |
341 | ||
342 | if (devc->reply_size + len > MAX_REPLY_SIZE) { | |
343 | /* Something went very wrong. */ | |
344 | sr_dbg("Receive buffer overrun."); | |
345 | devc->reply_size = 0; | |
346 | return; | |
347 | } | |
348 | ||
349 | memcpy(devc->reply + devc->reply_size, data, len); | |
350 | devc->reply_size += len; | |
351 | /* Sixth byte contains the length of the packet. */ | |
352 | if (devc->reply_size < 7) | |
353 | return; | |
354 | ||
355 | packet_size = 7 + devc->reply[6] * 7 + 2; | |
356 | if (devc->reply_size < packet_size) | |
357 | return; | |
358 | ||
359 | if (!testo_check_packet_prefix(devc->reply, devc->reply_size)) | |
360 | return; | |
361 | ||
362 | crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2); | |
363 | if (crc == RL16(&devc->reply[devc->reply_size - 2])) { | |
364 | testo_receive_packet(sdi); | |
365 | devc->num_samples++; | |
366 | } else { | |
367 | sr_dbg("Packet has invalid CRC."); | |
368 | } | |
369 | ||
370 | devc->reply_size = 0; | |
371 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) | |
372 | dev_acquisition_stop(sdi, devc->cb_data); | |
373 | else | |
374 | testo_request_packet(sdi); | |
375 | ||
376 | } | |
377 | ||
378 | SR_PRIV void receive_transfer(struct libusb_transfer *transfer) | |
379 | { | |
380 | struct dev_context *devc; | |
381 | struct sr_dev_inst *sdi; | |
382 | int ret; | |
383 | ||
384 | sdi = transfer->user_data; | |
385 | devc = sdi->priv; | |
386 | if (transfer == devc->out_transfer) | |
387 | /* Just the command acknowledgement. */ | |
388 | return; | |
389 | ||
390 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
391 | /* USB device was unplugged. */ | |
392 | dev_acquisition_stop(sdi, devc->cb_data); | |
393 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
394 | /* First two bytes in any transfer are FTDI status bytes. */ | |
395 | if (transfer->actual_length > 2) | |
396 | receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2); | |
397 | } | |
398 | /* Anything else is either an error or a timeout, which is fine: | |
399 | * we were just going to send another transfer request anyway. */ | |
400 | ||
401 | if (sdi->status == SR_ST_ACTIVE) { | |
402 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
403 | sr_err("Unable to resubmit transfer: %s.", | |
404 | libusb_error_name(ret)); | |
405 | g_free(transfer->buffer); | |
406 | libusb_free_transfer(transfer); | |
407 | dev_acquisition_stop(sdi, devc->cb_data); | |
408 | } | |
409 | } else { | |
410 | /* This was the last transfer we're going to receive, so | |
411 | * clean up now. */ | |
412 | g_free(transfer->buffer); | |
413 | libusb_free_transfer(transfer); | |
414 | } | |
415 | } | |
416 | ||
417 | static int handle_events(int fd, int revents, void *cb_data) | |
418 | { | |
419 | struct sr_dev_driver *di; | |
420 | struct dev_context *devc; | |
421 | struct drv_context *drvc; | |
422 | struct sr_datafeed_packet packet; | |
423 | struct sr_dev_inst *sdi; | |
424 | struct timeval tv; | |
425 | gint64 now; | |
426 | ||
427 | (void)fd; | |
428 | (void)revents; | |
429 | ||
430 | sdi = cb_data; | |
431 | devc = sdi->priv; | |
432 | di = sdi->driver; | |
433 | drvc = di->priv; | |
434 | ||
435 | if (devc->limit_msec) { | |
436 | now = g_get_monotonic_time() / 1000; | |
437 | if (now > devc->end_time) | |
438 | dev_acquisition_stop(sdi, devc->cb_data); | |
439 | } | |
440 | ||
441 | if (sdi->status == SR_ST_STOPPING) { | |
442 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
443 | ||
444 | dev_close(sdi); | |
445 | ||
446 | packet.type = SR_DF_END; | |
447 | sr_session_send(sdi, &packet); | |
448 | } | |
449 | ||
450 | memset(&tv, 0, sizeof(struct timeval)); | |
451 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
452 | NULL); | |
453 | ||
454 | return TRUE; | |
455 | } | |
456 | ||
457 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
458 | { | |
459 | struct sr_dev_driver *di = sdi->driver; | |
460 | struct drv_context *drvc; | |
461 | struct dev_context *devc; | |
462 | struct sr_usb_dev_inst *usb; | |
463 | struct libusb_transfer *transfer; | |
464 | int ret; | |
465 | unsigned char *buf; | |
466 | ||
467 | drvc = di->priv; | |
468 | if (sdi->status != SR_ST_ACTIVE) | |
469 | return SR_ERR_DEV_CLOSED; | |
470 | ||
471 | if (!di->priv) { | |
472 | sr_err("Driver was not initialized."); | |
473 | return SR_ERR; | |
474 | } | |
475 | ||
476 | devc = sdi->priv; | |
477 | usb = sdi->conn; | |
478 | devc->cb_data = cb_data; | |
479 | devc->end_time = 0; | |
480 | devc->num_samples = 0; | |
481 | devc->reply_size = 0; | |
482 | ||
483 | /* Send header packet to the session bus. */ | |
484 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
485 | ||
486 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
487 | handle_events, (void *)sdi); | |
488 | ||
489 | if (testo_set_serial_params(usb) != SR_OK) | |
490 | return SR_ERR; | |
491 | ||
492 | devc->out_transfer = libusb_alloc_transfer(0); | |
493 | if (testo_request_packet(sdi) != SR_OK) | |
494 | return SR_ERR; | |
495 | ||
496 | buf = g_try_malloc(MAX_REPLY_SIZE); | |
497 | transfer = libusb_alloc_transfer(0); | |
498 | libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf, | |
499 | MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100); | |
500 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
501 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
502 | libusb_free_transfer(transfer); | |
503 | g_free(buf); | |
504 | return SR_ERR; | |
505 | } | |
506 | devc->reply_size = 0; | |
507 | ||
508 | return SR_OK; | |
509 | } | |
510 | ||
511 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
512 | { | |
513 | struct sr_dev_driver *di = sdi->driver; | |
514 | (void)cb_data; | |
515 | ||
516 | if (!di->priv) { | |
517 | sr_err("Driver was not initialized."); | |
518 | return SR_ERR; | |
519 | } | |
520 | ||
521 | if (sdi->status != SR_ST_ACTIVE) | |
522 | return SR_ERR_DEV_CLOSED; | |
523 | ||
524 | sdi->status = SR_ST_STOPPING; | |
525 | ||
526 | return SR_OK; | |
527 | } | |
528 | ||
529 | SR_PRIV struct sr_dev_driver testo_driver_info = { | |
530 | .name = "testo", | |
531 | .longname = "Testo", | |
532 | .api_version = 1, | |
533 | .init = init, | |
534 | .cleanup = cleanup, | |
535 | .scan = scan, | |
536 | .dev_list = dev_list, | |
537 | .dev_clear = dev_clear, | |
538 | .config_get = config_get, | |
539 | .config_set = config_set, | |
540 | .config_list = config_list, | |
541 | .dev_open = dev_open, | |
542 | .dev_close = dev_close, | |
543 | .dev_acquisition_start = dev_acquisition_start, | |
544 | .dev_acquisition_stop = dev_acquisition_stop, | |
545 | .priv = NULL, | |
546 | }; |