]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 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 <glib.h> | |
21 | #include <libusb.h> | |
22 | #include "libsigrok.h" | |
23 | #include "libsigrok-internal.h" | |
24 | #include "protocol.h" | |
25 | ||
26 | SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address); | |
27 | SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info; | |
28 | static struct sr_dev_driver *di = &lascar_el_usb_driver_info; | |
29 | ||
30 | static const int32_t hwopts[] = { | |
31 | SR_CONF_CONN, | |
32 | }; | |
33 | ||
34 | static const int32_t hwcaps[] = { | |
35 | SR_CONF_THERMOMETER, | |
36 | SR_CONF_HYGROMETER, | |
37 | SR_CONF_DATALOG, | |
38 | SR_CONF_LIMIT_SAMPLES, | |
39 | }; | |
40 | ||
41 | static int dev_clear(void) | |
42 | { | |
43 | return std_dev_clear(di, NULL); | |
44 | } | |
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; | |
54 | struct sr_dev_inst *sdi; | |
55 | struct sr_usb_dev_inst *usb; | |
56 | struct sr_config *src; | |
57 | GSList *usb_devices, *devices, *l; | |
58 | const char *conn; | |
59 | ||
60 | drvc = di->priv; | |
61 | ||
62 | conn = NULL; | |
63 | for (l = options; l; l = l->next) { | |
64 | src = l->data; | |
65 | switch (src->key) { | |
66 | case SR_CONF_CONN: | |
67 | conn = g_variant_get_string(src->data, NULL); | |
68 | break; | |
69 | } | |
70 | } | |
71 | if (!conn) | |
72 | return NULL; | |
73 | ||
74 | devices = NULL; | |
75 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
76 | /* We have a list of sr_usb_dev_inst matching the connection | |
77 | * string. Wrap them in sr_dev_inst and we're done. */ | |
78 | for (l = usb_devices; l; l = l->next) { | |
79 | usb = l->data; | |
80 | if (!(sdi = lascar_scan(usb->bus, usb->address))) { | |
81 | /* Not a Lascar EL-USB. */ | |
82 | g_free(usb); | |
83 | continue; | |
84 | } | |
85 | sdi->inst_type = SR_INST_USB; | |
86 | sdi->conn = usb; | |
87 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
88 | devices = g_slist_append(devices, sdi); | |
89 | } | |
90 | g_slist_free(usb_devices); | |
91 | } else | |
92 | g_slist_free_full(usb_devices, g_free); | |
93 | ||
94 | return devices; | |
95 | } | |
96 | ||
97 | static GSList *dev_list(void) | |
98 | { | |
99 | return ((struct drv_context *)(di->priv))->instances; | |
100 | } | |
101 | ||
102 | static int dev_open(struct sr_dev_inst *sdi) | |
103 | { | |
104 | struct drv_context *drvc; | |
105 | struct sr_usb_dev_inst *usb; | |
106 | int ret; | |
107 | ||
108 | if (!(drvc = di->priv)) { | |
109 | sr_err("Driver was not initialized."); | |
110 | return SR_ERR; | |
111 | } | |
112 | ||
113 | usb = sdi->conn; | |
114 | ||
115 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
116 | return SR_ERR; | |
117 | ||
118 | if ((ret = libusb_claim_interface(usb->devhdl, LASCAR_INTERFACE))) { | |
119 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
120 | return SR_ERR; | |
121 | } | |
122 | sdi->status = SR_ST_ACTIVE; | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
127 | static int dev_close(struct sr_dev_inst *sdi) | |
128 | { | |
129 | struct sr_usb_dev_inst *usb; | |
130 | ||
131 | if (!di->priv) { | |
132 | sr_err("Driver was not initialized."); | |
133 | return SR_ERR; | |
134 | } | |
135 | ||
136 | usb = sdi->conn; | |
137 | ||
138 | if (!usb->devhdl) | |
139 | /* Nothing to do. */ | |
140 | return SR_OK; | |
141 | ||
142 | libusb_release_interface(usb->devhdl, LASCAR_INTERFACE); | |
143 | libusb_close(usb->devhdl); | |
144 | usb->devhdl = NULL; | |
145 | sdi->status = SR_ST_INACTIVE; | |
146 | ||
147 | return SR_OK; | |
148 | } | |
149 | ||
150 | static int cleanup(void) | |
151 | { | |
152 | int ret; | |
153 | struct drv_context *drvc; | |
154 | ||
155 | if (!(drvc = di->priv)) | |
156 | /* Can get called on an unused driver, doesn't matter. */ | |
157 | return SR_OK; | |
158 | ||
159 | ret = dev_clear(); | |
160 | g_free(drvc); | |
161 | di->priv = NULL; | |
162 | ||
163 | return ret; | |
164 | } | |
165 | ||
166 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, | |
167 | const struct sr_probe_group *probe_group) | |
168 | { | |
169 | struct dev_context *devc; | |
170 | struct sr_usb_dev_inst *usb; | |
171 | int ret; | |
172 | char str[128]; | |
173 | ||
174 | (void)probe_group; | |
175 | ||
176 | devc = sdi->priv; | |
177 | switch (id) { | |
178 | case SR_CONF_CONN: | |
179 | if (!sdi || !sdi->conn) | |
180 | return SR_ERR_ARG; | |
181 | usb = sdi->conn; | |
182 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
183 | *data = g_variant_new_string(str); | |
184 | break; | |
185 | case SR_CONF_DATALOG: | |
186 | if (!sdi) | |
187 | return SR_ERR_ARG; | |
188 | if ((ret = lascar_is_logging(sdi)) == -1) | |
189 | return SR_ERR; | |
190 | *data = g_variant_new_boolean(ret ? TRUE : FALSE); | |
191 | break; | |
192 | case SR_CONF_LIMIT_SAMPLES: | |
193 | *data = g_variant_new_uint64(devc->limit_samples); | |
194 | break; | |
195 | default: | |
196 | return SR_ERR_NA; | |
197 | } | |
198 | ||
199 | return SR_OK; | |
200 | } | |
201 | ||
202 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, | |
203 | const struct sr_probe_group *probe_group) | |
204 | { | |
205 | struct dev_context *devc; | |
206 | int ret; | |
207 | ||
208 | (void)probe_group; | |
209 | ||
210 | if (sdi->status != SR_ST_ACTIVE) | |
211 | return SR_ERR_DEV_CLOSED; | |
212 | ||
213 | if (!di->priv) { | |
214 | sr_err("Driver was not initialized."); | |
215 | return SR_ERR; | |
216 | } | |
217 | ||
218 | devc = sdi->priv; | |
219 | ret = SR_OK; | |
220 | switch (id) { | |
221 | case SR_CONF_DATALOG: | |
222 | if (g_variant_get_boolean(data)) { | |
223 | /* Start logging. */ | |
224 | ret = lascar_start_logging(sdi); | |
225 | } else { | |
226 | /* Stop logging. */ | |
227 | ret = lascar_stop_logging(sdi); | |
228 | } | |
229 | break; | |
230 | case SR_CONF_LIMIT_SAMPLES: | |
231 | devc->limit_samples = g_variant_get_uint64(data); | |
232 | sr_dbg("Setting sample limit to %" PRIu64 ".", | |
233 | devc->limit_samples); | |
234 | break; | |
235 | default: | |
236 | ret = SR_ERR_NA; | |
237 | } | |
238 | ||
239 | return ret; | |
240 | } | |
241 | ||
242 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
243 | const struct sr_probe_group *probe_group) | |
244 | { | |
245 | (void)sdi; | |
246 | (void)probe_group; | |
247 | ||
248 | switch (key) { | |
249 | case SR_CONF_SCAN_OPTIONS: | |
250 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
251 | hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t)); | |
252 | break; | |
253 | case SR_CONF_DEVICE_OPTIONS: | |
254 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
255 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
256 | break; | |
257 | default: | |
258 | return SR_ERR_NA; | |
259 | } | |
260 | ||
261 | return SR_OK; | |
262 | } | |
263 | ||
264 | static void mark_xfer(struct libusb_transfer *xfer) | |
265 | { | |
266 | ||
267 | if (xfer->status == LIBUSB_TRANSFER_COMPLETED) | |
268 | xfer->user_data = GINT_TO_POINTER(1); | |
269 | else | |
270 | xfer->user_data = GINT_TO_POINTER(-1); | |
271 | ||
272 | } | |
273 | ||
274 | /* The Lascar software, in its infinite ignorance, reads a set of four | |
275 | * bytes from the device config struct and interprets it as a float. | |
276 | * That only works because they only use windows, and only on x86. However | |
277 | * we may be running on any architecture, any operating system. So we have | |
278 | * to convert these four bytes as the Lascar software would on windows/x86, | |
279 | * to the local representation of a float. | |
280 | * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */ | |
281 | static float binary32_le_to_float(unsigned char *buf) | |
282 | { | |
283 | GFloatIEEE754 f; | |
284 | ||
285 | f.v_float = 0; | |
286 | f.mpn.sign = (buf[3] & 0x80) ? 1 : 0; | |
287 | f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7); | |
288 | f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16); | |
289 | ||
290 | return f.v_float; | |
291 | } | |
292 | ||
293 | static int lascar_proc_config(const struct sr_dev_inst *sdi) | |
294 | { | |
295 | struct dev_context *devc; | |
296 | struct sr_usb_dev_inst *usb; | |
297 | int dummy, ret; | |
298 | ||
299 | devc = sdi->priv; | |
300 | usb = sdi->conn; | |
301 | ||
302 | if (lascar_get_config(usb->devhdl, devc->config, &dummy) != SR_OK) | |
303 | return SR_ERR; | |
304 | ||
305 | ret = SR_OK; | |
306 | switch (devc->profile->logformat) { | |
307 | case LOG_TEMP_RH: | |
308 | devc->sample_size = 2; | |
309 | devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8); | |
310 | if (devc->temp_unit != 0 && devc->temp_unit != 1) { | |
311 | sr_dbg("invalid temperature unit %d", devc->temp_unit); | |
312 | /* Default to Celcius, we're all adults here. */ | |
313 | devc->temp_unit = 0; | |
314 | } else | |
315 | sr_dbg("temperature unit is %s", devc->temp_unit | |
316 | ? "Fahrenheit" : "Celcius"); | |
317 | break; | |
318 | case LOG_CO: | |
319 | devc->sample_size = 2; | |
320 | devc->co_high = binary32_le_to_float(devc->config + 0x24); | |
321 | devc->co_low = binary32_le_to_float(devc->config + 0x28); | |
322 | sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high, | |
323 | devc->co_low); | |
324 | break; | |
325 | default: | |
326 | ret = SR_ERR_ARG; | |
327 | } | |
328 | devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8); | |
329 | sr_dbg("device log contains %d samples.", devc->logged_samples); | |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
334 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
335 | { | |
336 | struct sr_datafeed_packet packet; | |
337 | struct sr_datafeed_meta meta; | |
338 | struct sr_config *src; | |
339 | struct dev_context *devc; | |
340 | struct drv_context *drvc; | |
341 | struct sr_usb_dev_inst *usb; | |
342 | struct libusb_transfer *xfer_in, *xfer_out; | |
343 | const struct libusb_pollfd **pfd; | |
344 | struct timeval tv; | |
345 | uint64_t interval; | |
346 | int ret, i; | |
347 | unsigned char cmd[3], resp[4], *buf; | |
348 | ||
349 | if (sdi->status != SR_ST_ACTIVE) | |
350 | return SR_ERR_DEV_CLOSED; | |
351 | ||
352 | if (!di->priv) { | |
353 | sr_err("Driver was not initialized."); | |
354 | return SR_ERR; | |
355 | } | |
356 | ||
357 | drvc = di->priv; | |
358 | devc = sdi->priv; | |
359 | usb = sdi->conn; | |
360 | devc->cb_data = cb_data; | |
361 | ||
362 | if (lascar_proc_config(sdi) != SR_OK) | |
363 | return SR_ERR; | |
364 | ||
365 | sr_dbg("Starting log retrieval."); | |
366 | ||
367 | /* Send header packet to the session bus. */ | |
368 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
369 | ||
370 | interval = (devc->config[0x1c] | (devc->config[0x1d] << 8)) * 1000; | |
371 | packet.type = SR_DF_META; | |
372 | packet.payload = &meta; | |
373 | src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, g_variant_new_uint64(interval)); | |
374 | meta.config = g_slist_append(NULL, src); | |
375 | sr_session_send(devc->cb_data, &packet); | |
376 | g_free(src); | |
377 | ||
378 | if (devc->logged_samples == 0) { | |
379 | /* This ensures the frontend knows the session is done. */ | |
380 | packet.type = SR_DF_END; | |
381 | sr_session_send(devc->cb_data, &packet); | |
382 | return SR_OK; | |
383 | } | |
384 | ||
385 | if (!(xfer_in = libusb_alloc_transfer(0)) || | |
386 | !(xfer_out = libusb_alloc_transfer(0))) | |
387 | return SR_ERR; | |
388 | ||
389 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
390 | 0x00, 0xffff, 0x00, NULL, 0, 50); | |
391 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
392 | 0x02, 0x0002, 0x00, NULL, 0, 50); | |
393 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
394 | 0x02, 0x0001, 0x00, NULL, 0, 50); | |
395 | ||
396 | ||
397 | /* Flush input. The F321 requires this. */ | |
398 | while (libusb_bulk_transfer(usb->devhdl, LASCAR_EP_IN, resp, | |
399 | 256, &ret, 5) == 0 && ret > 0) | |
400 | ; | |
401 | ||
402 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
403 | resp, sizeof(resp), mark_xfer, 0, 10000); | |
404 | if (libusb_submit_transfer(xfer_in) != 0) { | |
405 | libusb_free_transfer(xfer_in); | |
406 | libusb_free_transfer(xfer_out); | |
407 | return SR_ERR; | |
408 | } | |
409 | ||
410 | cmd[0] = 0x03; | |
411 | cmd[1] = 0xff; | |
412 | cmd[2] = 0xff; | |
413 | libusb_fill_bulk_transfer(xfer_out, usb->devhdl, LASCAR_EP_OUT, | |
414 | cmd, 3, mark_xfer, 0, 100); | |
415 | if (libusb_submit_transfer(xfer_out) != 0) { | |
416 | libusb_free_transfer(xfer_in); | |
417 | libusb_free_transfer(xfer_out); | |
418 | return SR_ERR; | |
419 | } | |
420 | ||
421 | tv.tv_sec = 0; | |
422 | tv.tv_usec = 0; | |
423 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
424 | g_usleep(5000); | |
425 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
426 | } | |
427 | if (xfer_in->user_data != GINT_TO_POINTER(1) || | |
428 | xfer_in->user_data != GINT_TO_POINTER(1)) { | |
429 | sr_dbg("no response to log transfer request"); | |
430 | libusb_free_transfer(xfer_in); | |
431 | libusb_free_transfer(xfer_out); | |
432 | return SR_ERR; | |
433 | } | |
434 | if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) { | |
435 | sr_dbg("invalid response to log transfer request"); | |
436 | libusb_free_transfer(xfer_in); | |
437 | libusb_free_transfer(xfer_out); | |
438 | return SR_ERR; | |
439 | } | |
440 | devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8); | |
441 | libusb_free_transfer(xfer_out); | |
442 | ||
443 | pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); | |
444 | for (i = 0; pfd[i]; i++) { | |
445 | /* Handle USB events every 100ms, for decent latency. */ | |
446 | sr_source_add(pfd[i]->fd, pfd[i]->events, 100, | |
447 | lascar_el_usb_handle_events, (void *)sdi); | |
448 | /* We'll need to remove this fd later. */ | |
449 | devc->usbfd[i] = pfd[i]->fd; | |
450 | } | |
451 | devc->usbfd[i] = -1; | |
452 | ||
453 | buf = g_try_malloc(4096); | |
454 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
455 | buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100); | |
456 | if ((ret = libusb_submit_transfer(xfer_in) != 0)) { | |
457 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
458 | libusb_free_transfer(xfer_in); | |
459 | g_free(buf); | |
460 | return SR_ERR; | |
461 | } | |
462 | ||
463 | return SR_OK; | |
464 | } | |
465 | ||
466 | SR_PRIV int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
467 | { | |
468 | (void)cb_data; | |
469 | ||
470 | if (!di->priv) { | |
471 | sr_err("Driver was not initialized."); | |
472 | return SR_ERR; | |
473 | } | |
474 | ||
475 | if (sdi->status != SR_ST_ACTIVE) { | |
476 | sr_err("Device inactive, can't stop acquisition."); | |
477 | return SR_ERR; | |
478 | } | |
479 | ||
480 | sdi->status = SR_ST_STOPPING; | |
481 | /* TODO: free ongoing transfers? */ | |
482 | ||
483 | return SR_OK; | |
484 | } | |
485 | ||
486 | SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = { | |
487 | .name = "lascar-el-usb", | |
488 | .longname = "Lascar EL-USB", | |
489 | .api_version = 1, | |
490 | .init = init, | |
491 | .cleanup = cleanup, | |
492 | .scan = scan, | |
493 | .dev_list = dev_list, | |
494 | .dev_clear = dev_clear, | |
495 | .config_get = config_get, | |
496 | .config_set = config_set, | |
497 | .config_list = config_list, | |
498 | .dev_open = dev_open, | |
499 | .dev_close = dev_close, | |
500 | .dev_acquisition_start = dev_acquisition_start, | |
501 | .dev_acquisition_stop = dev_acquisition_stop, | |
502 | .priv = NULL, | |
503 | }; |