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0acdd793 BV |
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 | ||
6dcb9723 BV |
20 | #include <string.h> |
21 | #include <libserialport.h> | |
0acdd793 BV |
22 | #include "protocol.h" |
23 | ||
6dcb9723 BV |
24 | #define SERIALCOMM "115200/8n1" |
25 | ||
0acdd793 BV |
26 | SR_PRIV struct sr_dev_driver testo_driver_info; |
27 | static struct sr_dev_driver *di = &testo_driver_info; | |
6dcb9723 BV |
28 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); |
29 | ||
30 | static const int32_t scanopts[] = { | |
31 | SR_CONF_CONN, | |
32 | }; | |
33 | ||
34 | static const int32_t devopts[] = { | |
35 | SR_CONF_MULTIMETER, | |
36 | SR_CONF_LIMIT_MSEC, | |
37 | SR_CONF_LIMIT_SAMPLES, | |
38 | SR_CONF_CONTINUOUS, | |
39 | }; | |
40 | ||
41 | unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 }; | |
42 | struct testo_model models[] = { | |
43 | { "435", 9, TESTO_x35_REQUEST }, | |
44 | }; | |
0acdd793 BV |
45 | |
46 | static int init(struct sr_context *sr_ctx) | |
47 | { | |
48 | return std_init(sr_ctx, di, LOG_PREFIX); | |
49 | } | |
50 | ||
51 | static GSList *scan(GSList *options) | |
52 | { | |
53 | struct drv_context *drvc; | |
6dcb9723 BV |
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 devcnt, ret, i; | |
63 | const char *str; | |
64 | char manufacturer[64], product[64]; | |
0acdd793 BV |
65 | |
66 | devices = NULL; | |
67 | drvc = di->priv; | |
68 | drvc->instances = NULL; | |
69 | ||
6dcb9723 BV |
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 | /* Hardcode the 435 for now.*/ | |
123 | if (strcmp(product, "testo 435/635/735")) | |
124 | continue; | |
125 | ||
126 | devcnt = g_slist_length(drvc->instances); | |
127 | sdi = sr_dev_inst_new(devcnt, 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 | devc = g_malloc(sizeof(struct dev_context)); | |
134 | devc->model = &models[0]; | |
135 | devc->limit_msec = 0; | |
136 | devc->limit_samples = 0; | |
137 | sdi->priv = devc; | |
138 | if (testo_probe_channels(sdi) != SR_OK) | |
139 | continue; | |
140 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
141 | devices = g_slist_append(devices, sdi); | |
142 | } | |
143 | libusb_free_device_list(devlist, 1); | |
144 | g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free); | |
0acdd793 BV |
145 | |
146 | return devices; | |
147 | } | |
148 | ||
149 | static GSList *dev_list(void) | |
150 | { | |
151 | return ((struct drv_context *)(di->priv))->instances; | |
152 | } | |
153 | ||
154 | static int dev_clear(void) | |
155 | { | |
156 | return std_dev_clear(di, NULL); | |
157 | } | |
158 | ||
159 | static int dev_open(struct sr_dev_inst *sdi) | |
160 | { | |
6dcb9723 BV |
161 | struct drv_context *drvc = di->priv; |
162 | struct sr_usb_dev_inst *usb; | |
163 | libusb_device **devlist; | |
164 | int ret, i; | |
165 | ||
166 | if (!di->priv) { | |
167 | sr_err("Driver was not initialized."); | |
168 | return SR_ERR; | |
169 | } | |
0acdd793 | 170 | |
6dcb9723 BV |
171 | usb = sdi->conn; |
172 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
173 | for (i = 0; devlist[i]; i++) { | |
174 | if (libusb_get_bus_number(devlist[i]) != usb->bus | |
175 | || libusb_get_device_address(devlist[i]) != usb->address) | |
176 | continue; | |
177 | if ((ret = libusb_open(devlist[i], &usb->devhdl))) { | |
178 | sr_err("Failed to open device: %s.", libusb_error_name(ret)); | |
179 | return SR_ERR; | |
180 | } | |
181 | break; | |
182 | } | |
183 | libusb_free_device_list(devlist, 1); | |
184 | if (!devlist[i]) { | |
185 | sr_err("Device not found."); | |
186 | return SR_ERR; | |
187 | } | |
0acdd793 | 188 | |
6dcb9723 BV |
189 | if ((ret = libusb_claim_interface(usb->devhdl, 0))) { |
190 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
191 | return SR_ERR; | |
192 | } | |
0acdd793 BV |
193 | sdi->status = SR_ST_ACTIVE; |
194 | ||
195 | return SR_OK; | |
196 | } | |
197 | ||
198 | static int dev_close(struct sr_dev_inst *sdi) | |
199 | { | |
6dcb9723 BV |
200 | struct sr_usb_dev_inst *usb; |
201 | ||
202 | if (!di->priv) { | |
203 | sr_err("Driver was not initialized."); | |
204 | return SR_ERR; | |
205 | } | |
0acdd793 | 206 | |
6dcb9723 BV |
207 | usb = sdi->conn; |
208 | if (!usb->devhdl) | |
209 | /* Nothing to do. */ | |
210 | return SR_OK; | |
0acdd793 | 211 | |
6dcb9723 BV |
212 | libusb_release_interface(usb->devhdl, 0); |
213 | libusb_close(usb->devhdl); | |
214 | usb->devhdl = NULL; | |
0acdd793 BV |
215 | sdi->status = SR_ST_INACTIVE; |
216 | ||
217 | return SR_OK; | |
218 | } | |
219 | ||
220 | static int cleanup(void) | |
221 | { | |
6dcb9723 BV |
222 | int ret; |
223 | struct drv_context *drvc; | |
0acdd793 | 224 | |
6dcb9723 BV |
225 | if (!(drvc = di->priv)) |
226 | return SR_OK; | |
0acdd793 | 227 | |
6dcb9723 BV |
228 | ret = dev_clear(); |
229 | g_free(drvc); | |
230 | di->priv = NULL; | |
231 | ||
232 | return ret; | |
0acdd793 BV |
233 | } |
234 | ||
235 | static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
236 | const struct sr_channel_group *cg) | |
237 | { | |
6dcb9723 BV |
238 | struct sr_usb_dev_inst *usb; |
239 | char str[128]; | |
0acdd793 | 240 | |
0acdd793 BV |
241 | (void)cg; |
242 | ||
0acdd793 | 243 | switch (key) { |
6dcb9723 BV |
244 | case SR_CONF_CONN: |
245 | if (!sdi || !sdi->conn) | |
246 | return SR_ERR_ARG; | |
247 | usb = sdi->conn; | |
248 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
249 | *data = g_variant_new_string(str); | |
250 | break; | |
0acdd793 BV |
251 | default: |
252 | return SR_ERR_NA; | |
253 | } | |
254 | ||
6dcb9723 | 255 | return SR_OK; |
0acdd793 BV |
256 | } |
257 | ||
258 | static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi, | |
259 | const struct sr_channel_group *cg) | |
260 | { | |
6dcb9723 BV |
261 | struct dev_context *devc; |
262 | gint64 now; | |
0acdd793 BV |
263 | int ret; |
264 | ||
0acdd793 BV |
265 | (void)cg; |
266 | ||
267 | if (sdi->status != SR_ST_ACTIVE) | |
268 | return SR_ERR_DEV_CLOSED; | |
269 | ||
6dcb9723 BV |
270 | if (!di->priv) { |
271 | sr_err("Driver was not initialized."); | |
272 | return SR_ERR; | |
273 | } | |
274 | ||
275 | devc = sdi->priv; | |
0acdd793 BV |
276 | ret = SR_OK; |
277 | switch (key) { | |
6dcb9723 BV |
278 | case SR_CONF_LIMIT_MSEC: |
279 | devc->limit_msec = g_variant_get_uint64(data); | |
280 | now = g_get_monotonic_time() / 1000; | |
281 | devc->end_time = now + devc->limit_msec; | |
282 | sr_dbg("Setting time limit to %" PRIu64 "ms.", | |
283 | devc->limit_msec); | |
284 | break; | |
285 | case SR_CONF_LIMIT_SAMPLES: | |
286 | devc->limit_samples = g_variant_get_uint64(data); | |
287 | sr_dbg("Setting sample limit to %" PRIu64 ".", | |
288 | devc->limit_samples); | |
289 | break; | |
0acdd793 BV |
290 | default: |
291 | ret = SR_ERR_NA; | |
292 | } | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
298 | const struct sr_channel_group *cg) | |
299 | { | |
0acdd793 | 300 | (void)sdi; |
0acdd793 BV |
301 | (void)cg; |
302 | ||
0acdd793 | 303 | switch (key) { |
6dcb9723 BV |
304 | case SR_CONF_SCAN_OPTIONS: |
305 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
306 | scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t)); | |
307 | break; | |
308 | case SR_CONF_DEVICE_OPTIONS: | |
309 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
310 | devopts, ARRAY_SIZE(devopts), sizeof(int32_t)); | |
311 | break; | |
0acdd793 BV |
312 | default: |
313 | return SR_ERR_NA; | |
314 | } | |
315 | ||
6dcb9723 | 316 | return SR_OK; |
0acdd793 BV |
317 | } |
318 | ||
6dcb9723 | 319 | static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len) |
0acdd793 | 320 | { |
6dcb9723 BV |
321 | struct dev_context *devc; |
322 | int packet_size; | |
87895640 | 323 | uint16_t crc; |
6dcb9723 BV |
324 | |
325 | devc = sdi->priv; | |
326 | ||
327 | if (devc->reply_size + len > MAX_REPLY_SIZE) { | |
328 | /* Something went very wrong. */ | |
329 | sr_dbg("Receive buffer overrun."); | |
330 | devc->reply_size = 0; | |
331 | return; | |
332 | } | |
333 | ||
334 | memcpy(devc->reply + devc->reply_size, data, len); | |
335 | devc->reply_size += len; | |
336 | /* Sixth byte contains the length of the packet. */ | |
87895640 BV |
337 | if (devc->reply_size < 7) |
338 | return; | |
339 | ||
340 | packet_size = 7 + devc->reply[6] * 7 + 2; | |
341 | if (devc->reply_size < packet_size) | |
342 | return; | |
343 | ||
344 | if (!testo_check_packet_prefix(devc->reply, devc->reply_size)) | |
345 | return; | |
346 | ||
347 | crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2); | |
348 | if ((crc & 0xff) == devc->reply[devc->reply_size - 2] | |
349 | && (crc >> 8) == devc->reply[devc->reply_size - 1]) { | |
350 | testo_receive_packet(sdi); | |
351 | devc->num_samples++; | |
352 | } else { | |
353 | sr_dbg("Packet has invalid CRC."); | |
6dcb9723 BV |
354 | } |
355 | ||
87895640 BV |
356 | devc->reply_size = 0; |
357 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) | |
358 | dev_acquisition_stop(sdi, devc->cb_data); | |
359 | else | |
360 | testo_request_packet(sdi); | |
361 | ||
6dcb9723 BV |
362 | } |
363 | ||
364 | SR_PRIV void receive_transfer(struct libusb_transfer *transfer) | |
365 | { | |
366 | struct dev_context *devc; | |
367 | struct sr_dev_inst *sdi; | |
368 | int ret; | |
369 | ||
370 | sdi = transfer->user_data; | |
371 | devc = sdi->priv; | |
372 | if (transfer == devc->out_transfer) | |
373 | /* Just the command acknowledgement. */ | |
374 | return; | |
375 | ||
376 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
377 | /* USB device was unplugged. */ | |
378 | dev_acquisition_stop(sdi, devc->cb_data); | |
379 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
380 | /* First two bytes in any transfer are FTDI status bytes. */ | |
381 | if (transfer->actual_length > 2) | |
382 | receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2); | |
383 | } | |
384 | /* Anything else is either an error or a timeout, which is fine: | |
385 | * we were just going to send another transfer request anyway. */ | |
386 | ||
387 | if (sdi->status == SR_ST_ACTIVE) { | |
388 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
389 | sr_err("Unable to resubmit transfer: %s.", | |
390 | libusb_error_name(ret)); | |
391 | g_free(transfer->buffer); | |
392 | libusb_free_transfer(transfer); | |
393 | dev_acquisition_stop(sdi, devc->cb_data); | |
394 | } | |
395 | } else { | |
396 | /* This was the last transfer we're going to receive, so | |
397 | * clean up now. */ | |
398 | g_free(transfer->buffer); | |
399 | libusb_free_transfer(transfer); | |
400 | } | |
401 | } | |
402 | ||
403 | static int handle_events(int fd, int revents, void *cb_data) | |
404 | { | |
405 | struct dev_context *devc; | |
406 | struct drv_context *drvc = di->priv; | |
407 | struct sr_datafeed_packet packet; | |
408 | struct sr_dev_inst *sdi; | |
409 | struct timeval tv; | |
410 | gint64 now; | |
411 | ||
412 | (void)fd; | |
413 | (void)revents; | |
414 | ||
415 | sdi = cb_data; | |
416 | devc = sdi->priv; | |
417 | ||
418 | if (devc->limit_msec) { | |
419 | now = g_get_monotonic_time() / 1000; | |
420 | if (now > devc->end_time) | |
421 | dev_acquisition_stop(sdi, devc->cb_data); | |
422 | } | |
423 | ||
424 | if (sdi->status == SR_ST_STOPPING) { | |
425 | usb_source_remove(drvc->sr_ctx); | |
426 | ||
427 | dev_close(sdi); | |
428 | ||
429 | packet.type = SR_DF_END; | |
430 | sr_session_send(sdi, &packet); | |
431 | } | |
432 | ||
433 | memset(&tv, 0, sizeof(struct timeval)); | |
434 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
435 | NULL); | |
436 | ||
437 | return TRUE; | |
438 | } | |
439 | ||
440 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
441 | { | |
442 | struct drv_context *drvc; | |
443 | struct dev_context *devc; | |
444 | struct sr_usb_dev_inst *usb; | |
445 | struct libusb_transfer *transfer; | |
446 | int ret; | |
447 | unsigned char *buf; | |
0acdd793 | 448 | |
6dcb9723 | 449 | drvc = di->priv; |
0acdd793 BV |
450 | if (sdi->status != SR_ST_ACTIVE) |
451 | return SR_ERR_DEV_CLOSED; | |
452 | ||
6dcb9723 BV |
453 | if (!di->priv) { |
454 | sr_err("Driver was not initialized."); | |
455 | return SR_ERR; | |
456 | } | |
457 | ||
458 | devc = sdi->priv; | |
459 | usb = sdi->conn; | |
460 | devc->cb_data = cb_data; | |
461 | devc->end_time = 0; | |
462 | devc->num_samples = 0; | |
463 | devc->reply_size = 0; | |
464 | ||
465 | /* Send header packet to the session bus. */ | |
466 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
467 | ||
468 | usb_source_add(drvc->sr_ctx, 100, handle_events, (void *)sdi); | |
469 | ||
470 | if (testo_set_serial_params(usb) != SR_OK) | |
471 | return SR_ERR; | |
472 | ||
473 | devc->out_transfer = libusb_alloc_transfer(0); | |
474 | if (testo_request_packet(sdi) != SR_OK) | |
475 | return SR_ERR; | |
476 | ||
477 | buf = g_try_malloc(MAX_REPLY_SIZE); | |
478 | transfer = libusb_alloc_transfer(0); | |
479 | libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf, | |
480 | MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100); | |
481 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
482 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
483 | libusb_free_transfer(transfer); | |
484 | g_free(buf); | |
485 | return SR_ERR; | |
486 | } | |
487 | devc->reply_size = 0; | |
0acdd793 BV |
488 | |
489 | return SR_OK; | |
490 | } | |
491 | ||
492 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
493 | { | |
494 | (void)cb_data; | |
495 | ||
6dcb9723 BV |
496 | if (!di->priv) { |
497 | sr_err("Driver was not initialized."); | |
498 | return SR_ERR; | |
499 | } | |
500 | ||
0acdd793 BV |
501 | if (sdi->status != SR_ST_ACTIVE) |
502 | return SR_ERR_DEV_CLOSED; | |
503 | ||
6dcb9723 | 504 | sdi->status = SR_ST_STOPPING; |
0acdd793 BV |
505 | |
506 | return SR_OK; | |
507 | } | |
508 | ||
509 | SR_PRIV struct sr_dev_driver testo_driver_info = { | |
510 | .name = "testo", | |
511 | .longname = "Testo", | |
512 | .api_version = 1, | |
513 | .init = init, | |
514 | .cleanup = cleanup, | |
515 | .scan = scan, | |
516 | .dev_list = dev_list, | |
517 | .dev_clear = dev_clear, | |
518 | .config_get = config_get, | |
519 | .config_set = config_set, | |
520 | .config_list = config_list, | |
521 | .dev_open = dev_open, | |
522 | .dev_close = dev_close, | |
523 | .dev_acquisition_start = dev_acquisition_start, | |
524 | .dev_acquisition_stop = dev_acquisition_stop, | |
525 | .priv = NULL, | |
526 | }; |