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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 <config.h> | |
21 | #include <string.h> | |
22 | #include "protocol.h" | |
23 | ||
24 | #define SERIALCOMM "115200/8n1" | |
25 | ||
26 | SR_PRIV struct sr_dev_driver testo_driver_info; | |
27 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
28 | ||
29 | static const uint32_t scanopts[] = { | |
30 | SR_CONF_CONN, | |
31 | }; | |
32 | ||
33 | static const uint32_t devopts[] = { | |
34 | SR_CONF_MULTIMETER, | |
35 | SR_CONF_CONTINUOUS, | |
36 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
37 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
38 | }; | |
39 | ||
40 | static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 }; | |
41 | ||
42 | static const struct testo_model models[] = { | |
43 | { "435", 9, TESTO_x35_REQUEST }, | |
44 | }; | |
45 | ||
46 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
47 | { | |
48 | return std_init(sr_ctx, di, LOG_PREFIX); | |
49 | } | |
50 | ||
51 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
52 | { | |
53 | struct drv_context *drvc; | |
54 | struct dev_context *devc; | |
55 | struct sr_config *src; | |
56 | struct sr_dev_inst *sdi; | |
57 | struct sr_usb_dev_inst *usb; | |
58 | struct libusb_device_descriptor des; | |
59 | libusb_device **devlist; | |
60 | struct libusb_device_handle *hdl; | |
61 | GSList *conn_devices, *devices, *l; | |
62 | int ret, i; | |
63 | const char *str; | |
64 | char manufacturer[64], product[64], connection_id[64]; | |
65 | ||
66 | devices = NULL; | |
67 | drvc = di->context; | |
68 | drvc->instances = NULL; | |
69 | ||
70 | conn_devices = NULL; | |
71 | for (l = options; l; l = l->next) { | |
72 | src = l->data; | |
73 | if (src->key != SR_CONF_CONN) | |
74 | continue; | |
75 | str = g_variant_get_string(src->data, NULL); | |
76 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str); | |
77 | } | |
78 | ||
79 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
80 | for (i = 0; devlist[i]; i++) { | |
81 | if (conn_devices) { | |
82 | usb = NULL; | |
83 | for (l = conn_devices; l; l = l->next) { | |
84 | usb = l->data; | |
85 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
86 | && usb->address == libusb_get_device_address(devlist[i])) | |
87 | break; | |
88 | } | |
89 | if (!l) | |
90 | /* This device matched none of the ones that | |
91 | * matched the conn specification. */ | |
92 | continue; | |
93 | } | |
94 | ||
95 | if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) { | |
96 | sr_warn("Failed to get device descriptor: %s.", | |
97 | libusb_error_name(ret)); | |
98 | continue; | |
99 | } | |
100 | ||
101 | if ((ret = libusb_open(devlist[i], &hdl)) < 0) | |
102 | continue; | |
103 | ||
104 | manufacturer[0] = product[0] = '\0'; | |
105 | if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii( | |
106 | hdl, des.iManufacturer, (unsigned char *) manufacturer, | |
107 | sizeof(manufacturer))) < 0) { | |
108 | sr_warn("Failed to get manufacturer string descriptor: %s.", | |
109 | libusb_error_name(ret)); | |
110 | } | |
111 | if (des.iProduct && (ret = libusb_get_string_descriptor_ascii( | |
112 | hdl, des.iProduct, (unsigned char *) product, | |
113 | sizeof(product))) < 0) { | |
114 | sr_warn("Failed to get product string descriptor: %s.", | |
115 | libusb_error_name(ret)); | |
116 | } | |
117 | libusb_close(hdl); | |
118 | ||
119 | if (strncmp(manufacturer, "testo", 5)) | |
120 | continue; | |
121 | ||
122 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
123 | ||
124 | /* Hardcode the 435 for now.*/ | |
125 | if (strcmp(product, "testo 435/635/735")) | |
126 | continue; | |
127 | ||
128 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
129 | sdi->status = SR_ST_INACTIVE; | |
130 | sdi->vendor = g_strdup("Testo"); | |
131 | sdi->model = g_strdup("435/635/735"); | |
132 | sdi->driver = di; | |
133 | sdi->inst_type = SR_INST_USB; | |
134 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
135 | libusb_get_device_address(devlist[i]), NULL); | |
136 | sdi->connection_id = g_strdup(connection_id); | |
137 | devc = g_malloc(sizeof(struct dev_context)); | |
138 | devc->model = &models[0]; | |
139 | devc->limit_msec = 0; | |
140 | devc->limit_samples = 0; | |
141 | sdi->priv = devc; | |
142 | if (testo_probe_channels(sdi) != SR_OK) | |
143 | continue; | |
144 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
145 | devices = g_slist_append(devices, sdi); | |
146 | } | |
147 | libusb_free_device_list(devlist, 1); | |
148 | g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free); | |
149 | ||
150 | return devices; | |
151 | } | |
152 | ||
153 | static GSList *dev_list(const struct sr_dev_driver *di) | |
154 | { | |
155 | return ((struct drv_context *)(di->context))->instances; | |
156 | } | |
157 | ||
158 | static int dev_clear(const struct sr_dev_driver *di) | |
159 | { | |
160 | return std_dev_clear(di, NULL); | |
161 | } | |
162 | ||
163 | static int dev_open(struct sr_dev_inst *sdi) | |
164 | { | |
165 | struct sr_dev_driver *di = sdi->driver; | |
166 | struct drv_context *drvc = di->context; | |
167 | struct sr_usb_dev_inst *usb; | |
168 | libusb_device **devlist; | |
169 | int ret, i; | |
170 | char connection_id[64]; | |
171 | ||
172 | if (!di->context) { | |
173 | sr_err("Driver was not initialized."); | |
174 | return SR_ERR; | |
175 | } | |
176 | ||
177 | usb = sdi->conn; | |
178 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
179 | for (i = 0; devlist[i]; i++) { | |
180 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
181 | if (strcmp(sdi->connection_id, connection_id)) | |
182 | continue; | |
183 | if ((ret = libusb_open(devlist[i], &usb->devhdl))) { | |
184 | sr_err("Failed to open device: %s.", libusb_error_name(ret)); | |
185 | return SR_ERR; | |
186 | } | |
187 | break; | |
188 | } | |
189 | libusb_free_device_list(devlist, 1); | |
190 | if (!devlist[i]) { | |
191 | sr_err("Device not found."); | |
192 | return SR_ERR; | |
193 | } | |
194 | ||
195 | if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) { | |
196 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
197 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
198 | sr_err("Failed to detach kernel driver: %s.", | |
199 | libusb_error_name(ret)); | |
200 | return SR_ERR; | |
201 | } | |
202 | } | |
203 | } | |
204 | ||
205 | if ((ret = libusb_claim_interface(usb->devhdl, 0))) { | |
206 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
207 | return SR_ERR; | |
208 | } | |
209 | sdi->status = SR_ST_ACTIVE; | |
210 | ||
211 | return SR_OK; | |
212 | } | |
213 | ||
214 | static int dev_close(struct sr_dev_inst *sdi) | |
215 | { | |
216 | struct sr_dev_driver *di = sdi->driver; | |
217 | struct sr_usb_dev_inst *usb; | |
218 | ||
219 | if (!di->context) { | |
220 | sr_err("Driver was not initialized."); | |
221 | return SR_ERR; | |
222 | } | |
223 | ||
224 | usb = sdi->conn; | |
225 | if (!usb->devhdl) | |
226 | /* Nothing to do. */ | |
227 | return SR_OK; | |
228 | ||
229 | libusb_release_interface(usb->devhdl, 0); | |
230 | libusb_close(usb->devhdl); | |
231 | usb->devhdl = NULL; | |
232 | sdi->status = SR_ST_INACTIVE; | |
233 | ||
234 | return SR_OK; | |
235 | } | |
236 | ||
237 | static int cleanup(const struct sr_dev_driver *di) | |
238 | { | |
239 | int ret; | |
240 | struct drv_context *drvc; | |
241 | ||
242 | if (!(drvc = di->context)) | |
243 | return SR_OK; | |
244 | ||
245 | ret = dev_clear(di); | |
246 | g_free(drvc); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
252 | const struct sr_channel_group *cg) | |
253 | { | |
254 | struct sr_usb_dev_inst *usb; | |
255 | char str[128]; | |
256 | ||
257 | (void)cg; | |
258 | ||
259 | switch (key) { | |
260 | case SR_CONF_CONN: | |
261 | if (!sdi || !sdi->conn) | |
262 | return SR_ERR_ARG; | |
263 | usb = sdi->conn; | |
264 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
265 | *data = g_variant_new_string(str); | |
266 | break; | |
267 | default: | |
268 | return SR_ERR_NA; | |
269 | } | |
270 | ||
271 | return SR_OK; | |
272 | } | |
273 | ||
274 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
275 | const struct sr_channel_group *cg) | |
276 | { | |
277 | struct sr_dev_driver *di = sdi->driver; | |
278 | struct dev_context *devc; | |
279 | gint64 now; | |
280 | int ret; | |
281 | ||
282 | (void)cg; | |
283 | ||
284 | if (sdi->status != SR_ST_ACTIVE) | |
285 | return SR_ERR_DEV_CLOSED; | |
286 | ||
287 | if (!di->context) { | |
288 | sr_err("Driver was not initialized."); | |
289 | return SR_ERR; | |
290 | } | |
291 | ||
292 | devc = sdi->priv; | |
293 | ret = SR_OK; | |
294 | switch (key) { | |
295 | case SR_CONF_LIMIT_MSEC: | |
296 | devc->limit_msec = g_variant_get_uint64(data); | |
297 | now = g_get_monotonic_time() / 1000; | |
298 | devc->end_time = now + devc->limit_msec; | |
299 | break; | |
300 | case SR_CONF_LIMIT_SAMPLES: | |
301 | devc->limit_samples = g_variant_get_uint64(data); | |
302 | break; | |
303 | default: | |
304 | ret = SR_ERR_NA; | |
305 | } | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
310 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
311 | const struct sr_channel_group *cg) | |
312 | { | |
313 | (void)sdi; | |
314 | (void)cg; | |
315 | ||
316 | switch (key) { | |
317 | case SR_CONF_SCAN_OPTIONS: | |
318 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
319 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
320 | break; | |
321 | case SR_CONF_DEVICE_OPTIONS: | |
322 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
323 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
324 | break; | |
325 | default: | |
326 | return SR_ERR_NA; | |
327 | } | |
328 | ||
329 | return SR_OK; | |
330 | } | |
331 | ||
332 | static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len) | |
333 | { | |
334 | struct dev_context *devc; | |
335 | int packet_size; | |
336 | uint16_t crc; | |
337 | ||
338 | devc = sdi->priv; | |
339 | ||
340 | if (devc->reply_size + len > MAX_REPLY_SIZE) { | |
341 | /* Something went very wrong. */ | |
342 | sr_dbg("Receive buffer overrun."); | |
343 | devc->reply_size = 0; | |
344 | return; | |
345 | } | |
346 | ||
347 | memcpy(devc->reply + devc->reply_size, data, len); | |
348 | devc->reply_size += len; | |
349 | /* Sixth byte contains the length of the packet. */ | |
350 | if (devc->reply_size < 7) | |
351 | return; | |
352 | ||
353 | packet_size = 7 + devc->reply[6] * 7 + 2; | |
354 | if (devc->reply_size < packet_size) | |
355 | return; | |
356 | ||
357 | if (!testo_check_packet_prefix(devc->reply, devc->reply_size)) | |
358 | return; | |
359 | ||
360 | crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2); | |
361 | if (crc == RL16(&devc->reply[devc->reply_size - 2])) { | |
362 | testo_receive_packet(sdi); | |
363 | devc->num_samples++; | |
364 | } else { | |
365 | sr_dbg("Packet has invalid CRC."); | |
366 | } | |
367 | ||
368 | devc->reply_size = 0; | |
369 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) | |
370 | dev_acquisition_stop(sdi, devc->cb_data); | |
371 | else | |
372 | testo_request_packet(sdi); | |
373 | ||
374 | } | |
375 | ||
376 | SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
377 | { | |
378 | struct dev_context *devc; | |
379 | struct sr_dev_inst *sdi; | |
380 | int ret; | |
381 | ||
382 | sdi = transfer->user_data; | |
383 | devc = sdi->priv; | |
384 | if (transfer == devc->out_transfer) | |
385 | /* Just the command acknowledgement. */ | |
386 | return; | |
387 | ||
388 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
389 | /* USB device was unplugged. */ | |
390 | dev_acquisition_stop(sdi, devc->cb_data); | |
391 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
392 | /* First two bytes in any transfer are FTDI status bytes. */ | |
393 | if (transfer->actual_length > 2) | |
394 | receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2); | |
395 | } | |
396 | /* Anything else is either an error or a timeout, which is fine: | |
397 | * we were just going to send another transfer request anyway. */ | |
398 | ||
399 | if (sdi->status == SR_ST_ACTIVE) { | |
400 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
401 | sr_err("Unable to resubmit transfer: %s.", | |
402 | libusb_error_name(ret)); | |
403 | g_free(transfer->buffer); | |
404 | libusb_free_transfer(transfer); | |
405 | dev_acquisition_stop(sdi, devc->cb_data); | |
406 | } | |
407 | } else { | |
408 | /* This was the last transfer we're going to receive, so | |
409 | * clean up now. */ | |
410 | g_free(transfer->buffer); | |
411 | libusb_free_transfer(transfer); | |
412 | } | |
413 | } | |
414 | ||
415 | static int handle_events(int fd, int revents, void *cb_data) | |
416 | { | |
417 | struct sr_dev_driver *di; | |
418 | struct dev_context *devc; | |
419 | struct drv_context *drvc; | |
420 | struct sr_datafeed_packet packet; | |
421 | struct sr_dev_inst *sdi; | |
422 | struct timeval tv; | |
423 | gint64 now; | |
424 | ||
425 | (void)fd; | |
426 | (void)revents; | |
427 | ||
428 | sdi = cb_data; | |
429 | devc = sdi->priv; | |
430 | di = sdi->driver; | |
431 | drvc = di->context; | |
432 | ||
433 | if (devc->limit_msec) { | |
434 | now = g_get_monotonic_time() / 1000; | |
435 | if (now > devc->end_time) | |
436 | dev_acquisition_stop(sdi, devc->cb_data); | |
437 | } | |
438 | ||
439 | if (sdi->status == SR_ST_STOPPING) { | |
440 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
441 | ||
442 | dev_close(sdi); | |
443 | ||
444 | packet.type = SR_DF_END; | |
445 | sr_session_send(sdi, &packet); | |
446 | } | |
447 | ||
448 | memset(&tv, 0, sizeof(struct timeval)); | |
449 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
450 | NULL); | |
451 | ||
452 | return TRUE; | |
453 | } | |
454 | ||
455 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
456 | { | |
457 | struct sr_dev_driver *di = sdi->driver; | |
458 | struct drv_context *drvc; | |
459 | struct dev_context *devc; | |
460 | struct sr_usb_dev_inst *usb; | |
461 | struct libusb_transfer *transfer; | |
462 | int ret; | |
463 | unsigned char *buf; | |
464 | ||
465 | drvc = di->context; | |
466 | if (sdi->status != SR_ST_ACTIVE) | |
467 | return SR_ERR_DEV_CLOSED; | |
468 | ||
469 | if (!di->context) { | |
470 | sr_err("Driver was not initialized."); | |
471 | return SR_ERR; | |
472 | } | |
473 | ||
474 | devc = sdi->priv; | |
475 | usb = sdi->conn; | |
476 | devc->cb_data = cb_data; | |
477 | devc->end_time = 0; | |
478 | devc->num_samples = 0; | |
479 | devc->reply_size = 0; | |
480 | ||
481 | /* Send header packet to the session bus. */ | |
482 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
483 | ||
484 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
485 | handle_events, (void *)sdi); | |
486 | ||
487 | if (testo_set_serial_params(usb) != SR_OK) | |
488 | return SR_ERR; | |
489 | ||
490 | devc->out_transfer = libusb_alloc_transfer(0); | |
491 | if (testo_request_packet(sdi) != SR_OK) | |
492 | return SR_ERR; | |
493 | ||
494 | buf = g_malloc(MAX_REPLY_SIZE); | |
495 | transfer = libusb_alloc_transfer(0); | |
496 | libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf, | |
497 | MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100); | |
498 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
499 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
500 | libusb_free_transfer(transfer); | |
501 | g_free(buf); | |
502 | return SR_ERR; | |
503 | } | |
504 | devc->reply_size = 0; | |
505 | ||
506 | return SR_OK; | |
507 | } | |
508 | ||
509 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
510 | { | |
511 | struct sr_dev_driver *di = sdi->driver; | |
512 | (void)cb_data; | |
513 | ||
514 | if (!di->context) { | |
515 | sr_err("Driver was not initialized."); | |
516 | return SR_ERR; | |
517 | } | |
518 | ||
519 | if (sdi->status != SR_ST_ACTIVE) | |
520 | return SR_ERR_DEV_CLOSED; | |
521 | ||
522 | sdi->status = SR_ST_STOPPING; | |
523 | ||
524 | return SR_OK; | |
525 | } | |
526 | ||
527 | SR_PRIV struct sr_dev_driver testo_driver_info = { | |
528 | .name = "testo", | |
529 | .longname = "Testo", | |
530 | .api_version = 1, | |
531 | .init = init, | |
532 | .cleanup = cleanup, | |
533 | .scan = scan, | |
534 | .dev_list = dev_list, | |
535 | .dev_clear = dev_clear, | |
536 | .config_get = config_get, | |
537 | .config_set = config_set, | |
538 | .config_list = config_list, | |
539 | .dev_open = dev_open, | |
540 | .dev_close = dev_close, | |
541 | .dev_acquisition_start = dev_acquisition_start, | |
542 | .dev_acquisition_stop = dev_acquisition_stop, | |
543 | .context = NULL, | |
544 | }; |