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