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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_driver lascar_el_usb_driver_info; | |
27 | ||
28 | static const uint32_t scanopts[] = { | |
29 | SR_CONF_CONN, | |
30 | }; | |
31 | ||
32 | static const uint32_t devopts[] = { | |
33 | SR_CONF_THERMOMETER, | |
34 | SR_CONF_HYGROMETER, | |
35 | SR_CONF_CONN | SR_CONF_GET, | |
36 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
37 | SR_CONF_DATALOG | SR_CONF_GET | SR_CONF_SET, | |
38 | }; | |
39 | ||
40 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
41 | { | |
42 | return std_init(sr_ctx, di, LOG_PREFIX); | |
43 | } | |
44 | ||
45 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
46 | { | |
47 | struct drv_context *drvc; | |
48 | struct sr_dev_inst *sdi; | |
49 | struct sr_usb_dev_inst *usb; | |
50 | struct sr_config *src; | |
51 | GSList *usb_devices, *devices, *l; | |
52 | const char *conn; | |
53 | ||
54 | drvc = di->priv; | |
55 | ||
56 | conn = NULL; | |
57 | for (l = options; l; l = l->next) { | |
58 | src = l->data; | |
59 | switch (src->key) { | |
60 | case SR_CONF_CONN: | |
61 | conn = g_variant_get_string(src->data, NULL); | |
62 | break; | |
63 | } | |
64 | } | |
65 | if (!conn) | |
66 | return NULL; | |
67 | ||
68 | devices = NULL; | |
69 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
70 | /* We have a list of sr_usb_dev_inst matching the connection | |
71 | * string. Wrap them in sr_dev_inst and we're done. */ | |
72 | for (l = usb_devices; l; l = l->next) { | |
73 | usb = l->data; | |
74 | if (!(sdi = lascar_scan(usb->bus, usb->address))) { | |
75 | /* Not a Lascar EL-USB. */ | |
76 | g_free(usb); | |
77 | continue; | |
78 | } | |
79 | sdi->inst_type = SR_INST_USB; | |
80 | sdi->conn = usb; | |
81 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
82 | devices = g_slist_append(devices, sdi); | |
83 | } | |
84 | g_slist_free(usb_devices); | |
85 | } else | |
86 | g_slist_free_full(usb_devices, g_free); | |
87 | ||
88 | return devices; | |
89 | } | |
90 | ||
91 | static GSList *dev_list(const struct sr_dev_driver *di) | |
92 | { | |
93 | return ((struct drv_context *)(di->priv))->instances; | |
94 | } | |
95 | ||
96 | static int dev_open(struct sr_dev_inst *sdi) | |
97 | { | |
98 | struct sr_dev_driver *di = sdi->driver; | |
99 | struct drv_context *drvc; | |
100 | struct sr_usb_dev_inst *usb; | |
101 | int ret; | |
102 | ||
103 | if (!(drvc = di->priv)) { | |
104 | sr_err("Driver was not initialized."); | |
105 | return SR_ERR; | |
106 | } | |
107 | ||
108 | usb = sdi->conn; | |
109 | ||
110 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
111 | return SR_ERR; | |
112 | ||
113 | if ((ret = libusb_claim_interface(usb->devhdl, LASCAR_INTERFACE))) { | |
114 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
115 | return SR_ERR; | |
116 | } | |
117 | sdi->status = SR_ST_ACTIVE; | |
118 | ||
119 | return ret; | |
120 | } | |
121 | ||
122 | static int dev_close(struct sr_dev_inst *sdi) | |
123 | { | |
124 | struct sr_dev_driver *di = sdi->driver; | |
125 | struct sr_usb_dev_inst *usb; | |
126 | ||
127 | if (!di->priv) { | |
128 | sr_err("Driver was not initialized."); | |
129 | return SR_ERR; | |
130 | } | |
131 | ||
132 | usb = sdi->conn; | |
133 | ||
134 | if (!usb->devhdl) | |
135 | /* Nothing to do. */ | |
136 | return SR_OK; | |
137 | ||
138 | libusb_release_interface(usb->devhdl, LASCAR_INTERFACE); | |
139 | libusb_close(usb->devhdl); | |
140 | usb->devhdl = NULL; | |
141 | sdi->status = SR_ST_INACTIVE; | |
142 | ||
143 | return SR_OK; | |
144 | } | |
145 | ||
146 | static int cleanup(const struct sr_dev_driver *di) | |
147 | { | |
148 | int ret; | |
149 | struct drv_context *drvc; | |
150 | ||
151 | if (!(drvc = di->priv)) | |
152 | /* Can get called on an unused driver, doesn't matter. */ | |
153 | return SR_OK; | |
154 | ||
155 | ret = std_dev_clear(di, NULL); | |
156 | g_free(drvc); | |
157 | ||
158 | return ret; | |
159 | } | |
160 | ||
161 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
162 | const struct sr_channel_group *cg) | |
163 | { | |
164 | struct dev_context *devc; | |
165 | struct sr_usb_dev_inst *usb; | |
166 | int ret; | |
167 | char str[128]; | |
168 | ||
169 | (void)cg; | |
170 | ||
171 | devc = sdi->priv; | |
172 | switch (key) { | |
173 | case SR_CONF_CONN: | |
174 | if (!sdi || !sdi->conn) | |
175 | return SR_ERR_ARG; | |
176 | usb = sdi->conn; | |
177 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
178 | *data = g_variant_new_string(str); | |
179 | break; | |
180 | case SR_CONF_DATALOG: | |
181 | if (!sdi) | |
182 | return SR_ERR_ARG; | |
183 | if ((ret = lascar_is_logging(sdi)) == -1) | |
184 | return SR_ERR; | |
185 | *data = g_variant_new_boolean(ret ? TRUE : FALSE); | |
186 | break; | |
187 | case SR_CONF_LIMIT_SAMPLES: | |
188 | *data = g_variant_new_uint64(devc->limit_samples); | |
189 | break; | |
190 | default: | |
191 | return SR_ERR_NA; | |
192 | } | |
193 | ||
194 | return SR_OK; | |
195 | } | |
196 | ||
197 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
198 | const struct sr_channel_group *cg) | |
199 | { | |
200 | struct sr_dev_driver *di = sdi->driver; | |
201 | struct dev_context *devc; | |
202 | int ret; | |
203 | ||
204 | (void)cg; | |
205 | ||
206 | if (sdi->status != SR_ST_ACTIVE) | |
207 | return SR_ERR_DEV_CLOSED; | |
208 | ||
209 | if (!di->priv) { | |
210 | sr_err("Driver was not initialized."); | |
211 | return SR_ERR; | |
212 | } | |
213 | ||
214 | devc = sdi->priv; | |
215 | ret = SR_OK; | |
216 | switch (key) { | |
217 | case SR_CONF_DATALOG: | |
218 | if (g_variant_get_boolean(data)) | |
219 | ret = lascar_start_logging(sdi); | |
220 | else | |
221 | ret = lascar_stop_logging(sdi); | |
222 | break; | |
223 | case SR_CONF_LIMIT_SAMPLES: | |
224 | devc->limit_samples = g_variant_get_uint64(data); | |
225 | break; | |
226 | default: | |
227 | ret = SR_ERR_NA; | |
228 | } | |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
234 | const struct sr_channel_group *cg) | |
235 | { | |
236 | (void)sdi; | |
237 | (void)cg; | |
238 | ||
239 | switch (key) { | |
240 | case SR_CONF_SCAN_OPTIONS: | |
241 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
242 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
243 | break; | |
244 | case SR_CONF_DEVICE_OPTIONS: | |
245 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
246 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
247 | break; | |
248 | default: | |
249 | return SR_ERR_NA; | |
250 | } | |
251 | ||
252 | return SR_OK; | |
253 | } | |
254 | ||
255 | static void mark_xfer(struct libusb_transfer *xfer) | |
256 | { | |
257 | ||
258 | if (xfer->status == LIBUSB_TRANSFER_COMPLETED) | |
259 | xfer->user_data = GINT_TO_POINTER(1); | |
260 | else | |
261 | xfer->user_data = GINT_TO_POINTER(-1); | |
262 | ||
263 | } | |
264 | ||
265 | /* The Lascar software, in its infinite ignorance, reads a set of four | |
266 | * bytes from the device config struct and interprets it as a float. | |
267 | * That only works because they only use windows, and only on x86. However | |
268 | * we may be running on any architecture, any operating system. So we have | |
269 | * to convert these four bytes as the Lascar software would on windows/x86, | |
270 | * to the local representation of a float. | |
271 | * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */ | |
272 | static float binary32_le_to_float(unsigned char *buf) | |
273 | { | |
274 | GFloatIEEE754 f; | |
275 | ||
276 | f.v_float = 0; | |
277 | f.mpn.sign = (buf[3] & 0x80) ? 1 : 0; | |
278 | f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7); | |
279 | f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16); | |
280 | ||
281 | return f.v_float; | |
282 | } | |
283 | ||
284 | static int lascar_proc_config(const struct sr_dev_inst *sdi) | |
285 | { | |
286 | struct dev_context *devc; | |
287 | struct sr_usb_dev_inst *usb; | |
288 | int dummy, ret; | |
289 | ||
290 | devc = sdi->priv; | |
291 | usb = sdi->conn; | |
292 | ||
293 | if (lascar_get_config(usb->devhdl, devc->config, &dummy) != SR_OK) | |
294 | return SR_ERR; | |
295 | ||
296 | ret = SR_OK; | |
297 | switch (devc->profile->logformat) { | |
298 | case LOG_TEMP_RH: | |
299 | devc->sample_size = 2; | |
300 | devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8); | |
301 | if (devc->temp_unit != 0 && devc->temp_unit != 1) { | |
302 | sr_dbg("invalid temperature unit %d", devc->temp_unit); | |
303 | /* Default to Celcius, we're all adults here. */ | |
304 | devc->temp_unit = 0; | |
305 | } else | |
306 | sr_dbg("temperature unit is %s", devc->temp_unit | |
307 | ? "Fahrenheit" : "Celcius"); | |
308 | break; | |
309 | case LOG_CO: | |
310 | devc->sample_size = 2; | |
311 | devc->co_high = binary32_le_to_float(devc->config + 0x24); | |
312 | devc->co_low = binary32_le_to_float(devc->config + 0x28); | |
313 | sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high, | |
314 | devc->co_low); | |
315 | break; | |
316 | default: | |
317 | ret = SR_ERR_ARG; | |
318 | } | |
319 | devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8); | |
320 | sr_dbg("device log contains %d samples.", devc->logged_samples); | |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
325 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
326 | { | |
327 | struct sr_dev_driver *di = sdi->driver; | |
328 | struct sr_datafeed_packet packet; | |
329 | struct sr_datafeed_meta meta; | |
330 | struct sr_config *src; | |
331 | struct dev_context *devc; | |
332 | struct drv_context *drvc; | |
333 | struct sr_usb_dev_inst *usb; | |
334 | struct libusb_transfer *xfer_in, *xfer_out; | |
335 | struct timeval tv; | |
336 | uint64_t interval; | |
337 | int ret; | |
338 | unsigned char cmd[3], resp[4], *buf; | |
339 | ||
340 | if (sdi->status != SR_ST_ACTIVE) | |
341 | return SR_ERR_DEV_CLOSED; | |
342 | ||
343 | if (!di->priv) { | |
344 | sr_err("Driver was not initialized."); | |
345 | return SR_ERR; | |
346 | } | |
347 | ||
348 | drvc = di->priv; | |
349 | devc = sdi->priv; | |
350 | usb = sdi->conn; | |
351 | devc->cb_data = cb_data; | |
352 | ||
353 | if (lascar_proc_config(sdi) != SR_OK) | |
354 | return SR_ERR; | |
355 | ||
356 | sr_dbg("Starting log retrieval."); | |
357 | ||
358 | /* Send header packet to the session bus. */ | |
359 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
360 | ||
361 | interval = (devc->config[0x1c] | (devc->config[0x1d] << 8)) * 1000; | |
362 | packet.type = SR_DF_META; | |
363 | packet.payload = &meta; | |
364 | src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, g_variant_new_uint64(interval)); | |
365 | meta.config = g_slist_append(NULL, src); | |
366 | sr_session_send(devc->cb_data, &packet); | |
367 | g_free(src); | |
368 | ||
369 | if (devc->logged_samples == 0) { | |
370 | /* This ensures the frontend knows the session is done. */ | |
371 | packet.type = SR_DF_END; | |
372 | sr_session_send(devc->cb_data, &packet); | |
373 | return SR_OK; | |
374 | } | |
375 | ||
376 | if (!(xfer_in = libusb_alloc_transfer(0)) || | |
377 | !(xfer_out = libusb_alloc_transfer(0))) | |
378 | return SR_ERR; | |
379 | ||
380 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
381 | 0x00, 0xffff, 0x00, NULL, 0, 50); | |
382 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
383 | 0x02, 0x0002, 0x00, NULL, 0, 50); | |
384 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
385 | 0x02, 0x0001, 0x00, NULL, 0, 50); | |
386 | ||
387 | /* Flush input. The F321 requires this. */ | |
388 | while (libusb_bulk_transfer(usb->devhdl, LASCAR_EP_IN, resp, | |
389 | 256, &ret, 5) == 0 && ret > 0) | |
390 | ; | |
391 | ||
392 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
393 | resp, sizeof(resp), mark_xfer, 0, 10000); | |
394 | if (libusb_submit_transfer(xfer_in) != 0) { | |
395 | libusb_free_transfer(xfer_in); | |
396 | libusb_free_transfer(xfer_out); | |
397 | return SR_ERR; | |
398 | } | |
399 | ||
400 | cmd[0] = 0x03; | |
401 | cmd[1] = 0xff; | |
402 | cmd[2] = 0xff; | |
403 | libusb_fill_bulk_transfer(xfer_out, usb->devhdl, LASCAR_EP_OUT, | |
404 | cmd, 3, mark_xfer, 0, 100); | |
405 | if (libusb_submit_transfer(xfer_out) != 0) { | |
406 | libusb_free_transfer(xfer_in); | |
407 | libusb_free_transfer(xfer_out); | |
408 | return SR_ERR; | |
409 | } | |
410 | ||
411 | tv.tv_sec = 0; | |
412 | tv.tv_usec = 0; | |
413 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
414 | g_usleep(5000); | |
415 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
416 | } | |
417 | if (xfer_in->user_data != GINT_TO_POINTER(1) || | |
418 | xfer_in->user_data != GINT_TO_POINTER(1)) { | |
419 | sr_dbg("no response to log transfer request"); | |
420 | libusb_free_transfer(xfer_in); | |
421 | libusb_free_transfer(xfer_out); | |
422 | return SR_ERR; | |
423 | } | |
424 | if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) { | |
425 | sr_dbg("invalid response to log transfer request"); | |
426 | libusb_free_transfer(xfer_in); | |
427 | libusb_free_transfer(xfer_out); | |
428 | return SR_ERR; | |
429 | } | |
430 | devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8); | |
431 | libusb_free_transfer(xfer_out); | |
432 | ||
433 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
434 | lascar_el_usb_handle_events, (void *)sdi); | |
435 | ||
436 | buf = g_try_malloc(4096); | |
437 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
438 | buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100); | |
439 | if ((ret = libusb_submit_transfer(xfer_in) != 0)) { | |
440 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
441 | libusb_free_transfer(xfer_in); | |
442 | g_free(buf); | |
443 | return SR_ERR; | |
444 | } | |
445 | ||
446 | return SR_OK; | |
447 | } | |
448 | ||
449 | SR_PRIV int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
450 | { | |
451 | struct sr_dev_driver *di = sdi->driver; | |
452 | (void)cb_data; | |
453 | ||
454 | if (!di->priv) { | |
455 | sr_err("Driver was not initialized."); | |
456 | return SR_ERR; | |
457 | } | |
458 | ||
459 | if (sdi->status != SR_ST_ACTIVE) { | |
460 | sr_err("Device inactive, can't stop acquisition."); | |
461 | return SR_ERR; | |
462 | } | |
463 | ||
464 | sdi->status = SR_ST_STOPPING; | |
465 | /* TODO: free ongoing transfers? */ | |
466 | ||
467 | return SR_OK; | |
468 | } | |
469 | ||
470 | SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = { | |
471 | .name = "lascar-el-usb", | |
472 | .longname = "Lascar EL-USB", | |
473 | .api_version = 1, | |
474 | .init = init, | |
475 | .cleanup = cleanup, | |
476 | .scan = scan, | |
477 | .dev_list = dev_list, | |
478 | .dev_clear = NULL, | |
479 | .config_get = config_get, | |
480 | .config_set = config_set, | |
481 | .config_list = config_list, | |
482 | .dev_open = dev_open, | |
483 | .dev_close = dev_close, | |
484 | .dev_acquisition_start = dev_acquisition_start, | |
485 | .dev_acquisition_stop = dev_acquisition_stop, | |
486 | .priv = NULL, | |
487 | }; |