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