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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 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 <stdio.h> | |
21 | #include <glib.h> | |
22 | #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */ | |
23 | #include "libsigrok.h" | |
24 | #include "libsigrok-internal.h" | |
25 | ||
26 | /** @cond PRIVATE */ | |
27 | #define LOG_PREFIX "device" | |
28 | /** @endcond */ | |
29 | ||
30 | /** | |
31 | * @file | |
32 | * | |
33 | * Device handling in libsigrok. | |
34 | */ | |
35 | ||
36 | /** | |
37 | * @defgroup grp_devices Devices | |
38 | * | |
39 | * Device handling in libsigrok. | |
40 | * | |
41 | * @{ | |
42 | */ | |
43 | ||
44 | /** @private | |
45 | * Allocate and initialize new struct sr_channel | |
46 | * @param[in] index @copydoc sr_channel::index | |
47 | * @param[in] type @copydoc sr_channel::type | |
48 | * @param[in] enabled @copydoc sr_channel::enabled | |
49 | * @param[in] name @copydoc sr_channel::name | |
50 | * | |
51 | * @return NULL (failure) or new struct sr_channel*. | |
52 | */ | |
53 | SR_PRIV struct sr_channel *sr_channel_new(int index, int type, | |
54 | gboolean enabled, const char *name) | |
55 | { | |
56 | struct sr_channel *ch; | |
57 | ||
58 | if (!(ch = g_try_malloc0(sizeof(struct sr_channel)))) { | |
59 | sr_err("Channel malloc failed."); | |
60 | return NULL; | |
61 | } | |
62 | ||
63 | ch->index = index; | |
64 | ch->type = type; | |
65 | ch->enabled = enabled; | |
66 | if (name) | |
67 | ch->name = g_strdup(name); | |
68 | ||
69 | return ch; | |
70 | } | |
71 | ||
72 | /** | |
73 | * Set the name of the specified channel in the specified device. | |
74 | * | |
75 | * If the channel already has a different name assigned to it, it will be | |
76 | * removed, and the new name will be saved instead. | |
77 | * | |
78 | * @param sdi The device instance the channel is connected to. | |
79 | * @param[in] channelnum The number of the channel whose name to set. | |
80 | * Note that the channel numbers start at 0. | |
81 | * @param[in] name The new name that the specified channel should get. A copy | |
82 | * of the string is made. | |
83 | * | |
84 | * @return SR_OK on success, or SR_ERR_ARG on invalid arguments. | |
85 | * | |
86 | * @since 0.3.0 | |
87 | */ | |
88 | SR_API int sr_dev_channel_name_set(const struct sr_dev_inst *sdi, | |
89 | int channelnum, const char *name) | |
90 | { | |
91 | GSList *l; | |
92 | struct sr_channel *ch; | |
93 | int ret; | |
94 | ||
95 | if (!sdi) { | |
96 | sr_err("%s: sdi was NULL", __func__); | |
97 | return SR_ERR_ARG; | |
98 | } | |
99 | ||
100 | ret = SR_ERR_ARG; | |
101 | for (l = sdi->channels; l; l = l->next) { | |
102 | ch = l->data; | |
103 | if (ch->index == channelnum) { | |
104 | g_free(ch->name); | |
105 | ch->name = g_strdup(name); | |
106 | ret = SR_OK; | |
107 | break; | |
108 | } | |
109 | } | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
114 | /** | |
115 | * Enable or disable a channel on the specified device. | |
116 | * | |
117 | * @param sdi The device instance the channel is connected to. | |
118 | * @param channelnum The channel number, starting from 0. | |
119 | * @param state TRUE to enable the channel, FALSE to disable. | |
120 | * | |
121 | * @return SR_OK on success or SR_ERR on failure. In case of invalid | |
122 | * arguments, SR_ERR_ARG is returned and the channel enabled state | |
123 | * remains unchanged. | |
124 | * | |
125 | * @since 0.3.0 | |
126 | */ | |
127 | SR_API int sr_dev_channel_enable(const struct sr_dev_inst *sdi, int channelnum, | |
128 | gboolean state) | |
129 | { | |
130 | GSList *l; | |
131 | struct sr_channel *ch; | |
132 | int ret; | |
133 | gboolean was_enabled; | |
134 | ||
135 | if (!sdi) | |
136 | return SR_ERR_ARG; | |
137 | ||
138 | ret = SR_ERR_ARG; | |
139 | for (l = sdi->channels; l; l = l->next) { | |
140 | ch = l->data; | |
141 | if (ch->index == channelnum) { | |
142 | was_enabled = ch->enabled; | |
143 | ch->enabled = state; | |
144 | ret = SR_OK; | |
145 | if (!state != !was_enabled && sdi->driver | |
146 | && sdi->driver->config_channel_set) { | |
147 | ret = sdi->driver->config_channel_set( | |
148 | sdi, ch, SR_CHANNEL_SET_ENABLED); | |
149 | /* Roll back change if it wasn't applicable. */ | |
150 | if (ret == SR_ERR_ARG) | |
151 | ch->enabled = was_enabled; | |
152 | } | |
153 | break; | |
154 | } | |
155 | } | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
160 | /** | |
161 | * Determine whether the specified device instance has the specified | |
162 | * capability. | |
163 | * | |
164 | * @param sdi Pointer to the device instance to be checked. Must not be NULL. | |
165 | * If the device's 'driver' field is NULL (virtual device), this | |
166 | * function will always return FALSE (virtual devices don't have | |
167 | * a hardware capabilities list). | |
168 | * @param[in] key The option that should be checked for is supported by the | |
169 | * specified device. | |
170 | * | |
171 | * @retval TRUE Device has the specified option | |
172 | * @retval FALSE Device does not have the specified option, invalid input | |
173 | * parameters or other error conditions. | |
174 | * | |
175 | * @since 0.2.0 | |
176 | */ | |
177 | SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key) | |
178 | { | |
179 | GVariant *gvar; | |
180 | const int *devopts; | |
181 | gsize num_opts, i; | |
182 | int ret; | |
183 | ||
184 | if (!sdi || !sdi->driver || !sdi->driver->config_list) | |
185 | return FALSE; | |
186 | ||
187 | if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS, | |
188 | &gvar, sdi, NULL) != SR_OK) | |
189 | return FALSE; | |
190 | ||
191 | ret = FALSE; | |
192 | devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t)); | |
193 | for (i = 0; i < num_opts; i++) { | |
194 | if ((devopts[i] & SR_CONF_MASK) == key) { | |
195 | ret = TRUE; | |
196 | break; | |
197 | } | |
198 | } | |
199 | g_variant_unref(gvar); | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
204 | /** @private | |
205 | * Allocate and init new device instance struct. | |
206 | * @param[in] index @copydoc sr_dev_inst::index | |
207 | * @param[in] status @copydoc sr_dev_inst::status | |
208 | * @param[in] vendor @copydoc sr_dev_inst::vendor | |
209 | * @param[in] model @copydoc sr_dev_inst::model | |
210 | * @param[in] version @copydoc sr_dev_inst::version | |
211 | * | |
212 | * @retval NULL Error | |
213 | * @retval struct sr_dev_inst *. Dynamically allocated, free using | |
214 | * sr_dev_inst_free(). | |
215 | */ | |
216 | SR_PRIV struct sr_dev_inst *sr_dev_inst_new(int status, | |
217 | const char *vendor, const char *model, const char *version) | |
218 | { | |
219 | struct sr_dev_inst *sdi; | |
220 | ||
221 | if (!(sdi = g_try_malloc(sizeof(struct sr_dev_inst)))) { | |
222 | sr_err("Device instance malloc failed."); | |
223 | return NULL; | |
224 | } | |
225 | ||
226 | sdi->driver = NULL; | |
227 | sdi->status = status; | |
228 | sdi->inst_type = -1; | |
229 | sdi->vendor = vendor ? g_strdup(vendor) : NULL; | |
230 | sdi->model = model ? g_strdup(model) : NULL; | |
231 | sdi->version = version ? g_strdup(version) : NULL; | |
232 | sdi->serial_num = NULL; | |
233 | sdi->connection_id = NULL; | |
234 | sdi->channels = NULL; | |
235 | sdi->channel_groups = NULL; | |
236 | sdi->session = NULL; | |
237 | sdi->conn = NULL; | |
238 | sdi->priv = NULL; | |
239 | ||
240 | return sdi; | |
241 | } | |
242 | ||
243 | /** @private | |
244 | * Free device instance struct created by sr_dev_inst(). | |
245 | * @param sdi struct* to free. | |
246 | */ | |
247 | SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi) | |
248 | { | |
249 | struct sr_channel *ch; | |
250 | GSList *l; | |
251 | ||
252 | for (l = sdi->channels; l; l = l->next) { | |
253 | ch = l->data; | |
254 | g_free(ch->name); | |
255 | g_free(ch->priv); | |
256 | g_free(ch); | |
257 | } | |
258 | g_slist_free(sdi->channels); | |
259 | ||
260 | if (sdi->channel_groups) | |
261 | g_slist_free(sdi->channel_groups); | |
262 | ||
263 | g_free(sdi->vendor); | |
264 | g_free(sdi->model); | |
265 | g_free(sdi->version); | |
266 | g_free(sdi->serial_num); | |
267 | g_free(sdi->connection_id); | |
268 | g_free(sdi); | |
269 | } | |
270 | ||
271 | #ifdef HAVE_LIBUSB_1_0 | |
272 | ||
273 | /** @private | |
274 | * Allocate and init struct for USB device instance. | |
275 | * @param[in] bus @copydoc sr_usb_dev_inst::bus | |
276 | * @param[in] address @copydoc sr_usb_dev_inst::address | |
277 | * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl | |
278 | * | |
279 | * @retval NULL Error | |
280 | * @retval other struct sr_usb_dev_inst * for USB device instance. | |
281 | */ | |
282 | SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus, | |
283 | uint8_t address, struct libusb_device_handle *hdl) | |
284 | { | |
285 | struct sr_usb_dev_inst *udi; | |
286 | ||
287 | if (!(udi = g_try_malloc(sizeof(struct sr_usb_dev_inst)))) { | |
288 | sr_err("USB device instance malloc failed."); | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | udi->bus = bus; | |
293 | udi->address = address; | |
294 | udi->devhdl = hdl; | |
295 | ||
296 | return udi; | |
297 | } | |
298 | ||
299 | /** @private | |
300 | * Free struct * allocated by sr_usb_dev_inst(). | |
301 | * @param usb struct* to free. Must not be NULL. | |
302 | */ | |
303 | SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb) | |
304 | { | |
305 | g_free(usb); | |
306 | } | |
307 | ||
308 | #endif | |
309 | ||
310 | #ifdef HAVE_LIBSERIALPORT | |
311 | ||
312 | /** | |
313 | * @private | |
314 | * | |
315 | * Both parameters are copied to newly allocated strings, and freed | |
316 | * automatically by sr_serial_dev_inst_free(). | |
317 | * | |
318 | * @param[in] port OS-specific serial port specification. Examples: | |
319 | * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1". | |
320 | * @param[in] serialcomm A serial communication parameters string, in the form | |
321 | * of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example | |
322 | * "9600/8n1" or "600/7o2". This is an optional parameter; | |
323 | * it may be filled in later. | |
324 | * | |
325 | * @return A pointer to a newly initialized struct sr_serial_dev_inst, | |
326 | * or NULL on error. | |
327 | */ | |
328 | SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port, | |
329 | const char *serialcomm) | |
330 | { | |
331 | struct sr_serial_dev_inst *serial; | |
332 | ||
333 | if (!port) { | |
334 | sr_err("Serial port required."); | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | if (!(serial = g_try_malloc0(sizeof(struct sr_serial_dev_inst)))) { | |
339 | sr_err("Serial device instance malloc failed."); | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | serial->port = g_strdup(port); | |
344 | if (serialcomm) | |
345 | serial->serialcomm = g_strdup(serialcomm); | |
346 | ||
347 | return serial; | |
348 | } | |
349 | ||
350 | /** @private | |
351 | * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst(). | |
352 | * @param serial struct sr_serial_dev_inst * to free. Must not be NULL. | |
353 | */ | |
354 | SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial) | |
355 | { | |
356 | g_free(serial->port); | |
357 | g_free(serial->serialcomm); | |
358 | g_free(serial); | |
359 | } | |
360 | #endif | |
361 | ||
362 | /** @private */ | |
363 | SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device) | |
364 | { | |
365 | struct sr_usbtmc_dev_inst *usbtmc; | |
366 | ||
367 | if (!device) { | |
368 | sr_err("Device name required."); | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | if (!(usbtmc = g_try_malloc0(sizeof(struct sr_usbtmc_dev_inst)))) { | |
373 | sr_err("USBTMC device instance malloc failed."); | |
374 | return NULL; | |
375 | } | |
376 | ||
377 | usbtmc->device = g_strdup(device); | |
378 | usbtmc->fd = -1; | |
379 | ||
380 | return usbtmc; | |
381 | } | |
382 | ||
383 | /** @private */ | |
384 | SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc) | |
385 | { | |
386 | g_free(usbtmc->device); | |
387 | g_free(usbtmc); | |
388 | } | |
389 | ||
390 | /** | |
391 | * Get the list of devices/instances of the specified driver. | |
392 | * | |
393 | * @param driver The driver to use. Must not be NULL. | |
394 | * | |
395 | * @return The list of devices/instances of this driver, or NULL upon errors | |
396 | * or if the list is empty. | |
397 | * | |
398 | * @since 0.2.0 | |
399 | */ | |
400 | SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver) | |
401 | { | |
402 | if (driver && driver->dev_list) | |
403 | return driver->dev_list(); | |
404 | else | |
405 | return NULL; | |
406 | } | |
407 | ||
408 | /** | |
409 | * Clear the list of device instances a driver knows about. | |
410 | * | |
411 | * @param driver The driver to use. This must be a pointer to one of | |
412 | * the entries returned by sr_driver_list(). Must not be NULL. | |
413 | * | |
414 | * @retval SR_OK Success | |
415 | * @retval SR_ERR_ARG Invalid driver | |
416 | * | |
417 | * @since 0.2.0 | |
418 | */ | |
419 | SR_API int sr_dev_clear(const struct sr_dev_driver *driver) | |
420 | { | |
421 | int ret; | |
422 | ||
423 | if (!driver) { | |
424 | sr_err("Invalid driver."); | |
425 | return SR_ERR_ARG; | |
426 | } | |
427 | ||
428 | if (driver->dev_clear) | |
429 | ret = driver->dev_clear(); | |
430 | else | |
431 | ret = std_dev_clear(driver, NULL); | |
432 | ||
433 | return ret; | |
434 | } | |
435 | ||
436 | /** | |
437 | * Open the specified device. | |
438 | * | |
439 | * @param sdi Device instance to use. Must not be NULL. | |
440 | * | |
441 | * @return SR_OK upon success, a negative error code upon errors. | |
442 | * | |
443 | * @since 0.2.0 | |
444 | */ | |
445 | SR_API int sr_dev_open(struct sr_dev_inst *sdi) | |
446 | { | |
447 | int ret; | |
448 | ||
449 | if (!sdi || !sdi->driver || !sdi->driver->dev_open) | |
450 | return SR_ERR; | |
451 | ||
452 | ret = sdi->driver->dev_open(sdi); | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | /** | |
458 | * Close the specified device. | |
459 | * | |
460 | * @param sdi Device instance to use. Must not be NULL. | |
461 | * | |
462 | * @return SR_OK upon success, a negative error code upon errors. | |
463 | * | |
464 | * @since 0.2.0 | |
465 | */ | |
466 | SR_API int sr_dev_close(struct sr_dev_inst *sdi) | |
467 | { | |
468 | int ret; | |
469 | ||
470 | if (!sdi || !sdi->driver || !sdi->driver->dev_close) | |
471 | return SR_ERR; | |
472 | ||
473 | ret = sdi->driver->dev_close(sdi); | |
474 | ||
475 | return ret; | |
476 | } | |
477 | ||
478 | /** @} */ |