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