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744e43bc VP |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
fcc65337 | 4 | * Copyright 2017 Google, Inc |
744e43bc VP |
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 2 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 <libusb.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <math.h> | |
25 | #include <libsigrok/libsigrok.h> | |
26 | #include "libsigrok-internal.h" | |
27 | #include "protocol.h" | |
28 | ||
29 | #define TWINKIE_VID 0x18d1 | |
30 | #define TWINKIE_PID 0x500a | |
31 | ||
32 | #define USB_INTERFACE 1 | |
33 | #define USB_CONFIGURATION 1 | |
fcc65337 | 34 | #define USB_COMMANDS_IFACE 2 |
744e43bc VP |
35 | |
36 | #define MAX_RENUM_DELAY_MS 3000 | |
37 | #define NUM_SIMUL_TRANSFERS 32 | |
38 | ||
39 | #define SAMPLE_RATE SR_KHZ(2400) | |
40 | ||
fcc65337 VP |
41 | static const char vbus_cmd[] = "tw vbus"; |
42 | ||
43 | /* CC1 & CC2 are always present */ | |
44 | #define LOGIC_CHANNELS_COUNT 2 | |
45 | ||
744e43bc VP |
46 | static const int32_t hwopts[] = { |
47 | SR_CONF_CONN, | |
fcc65337 | 48 | SR_CONF_NUM_ANALOG_CHANNELS, |
744e43bc VP |
49 | }; |
50 | ||
51 | static const int32_t hwcaps[] = { | |
52 | SR_CONF_LOGIC_ANALYZER, | |
53 | SR_CONF_CONTINUOUS, | |
54 | SR_CONF_CONN | SR_CONF_GET, | |
55 | SR_CONF_SAMPLERATE | SR_CONF_GET, | |
56 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
57 | }; | |
58 | ||
59 | static const struct chan { | |
60 | char *name; | |
61 | int type; | |
62 | } chan_defs[] = { | |
63 | {"CC1", SR_CHANNEL_LOGIC}, | |
64 | {"CC2", SR_CHANNEL_LOGIC}, | |
fcc65337 VP |
65 | {"VBUS_V", SR_CHANNEL_ANALOG}, |
66 | {"VBUS_A", SR_CHANNEL_ANALOG}, | |
744e43bc VP |
67 | |
68 | {NULL, 0} | |
69 | }; | |
70 | ||
71 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
72 | { | |
73 | struct drv_context *drvc; | |
74 | struct dev_context *devc; | |
75 | struct sr_dev_inst *sdi; | |
76 | struct sr_usb_dev_inst *usb; | |
77 | struct sr_channel *ch; | |
fcc65337 | 78 | struct sr_channel_group *cc_grp, *vbus_grp[VBUS_GRP_COUNT]; |
744e43bc VP |
79 | struct sr_config *src; |
80 | GSList *l, *devices, *conn_devices; | |
81 | struct libusb_device_descriptor des; | |
fcc65337 | 82 | struct libusb_config_descriptor *cfg; |
744e43bc VP |
83 | libusb_device **devlist; |
84 | int ret, i, j; | |
85 | const char *conn; | |
86 | char connection_id[64]; | |
fcc65337 VP |
87 | /* By default, disable VBUS analog */ |
88 | int vbus_channels = 0; | |
744e43bc VP |
89 | |
90 | drvc = di->context; | |
91 | ||
92 | conn = NULL; | |
93 | for (l = options; l; l = l->next) { | |
94 | src = l->data; | |
95 | switch (src->key) { | |
96 | case SR_CONF_CONN: | |
97 | conn = g_variant_get_string(src->data, NULL); | |
98 | break; | |
fcc65337 VP |
99 | case SR_CONF_NUM_ANALOG_CHANNELS: |
100 | vbus_channels = MIN(2, g_variant_get_int32(src->data)); | |
101 | break; | |
744e43bc VP |
102 | } |
103 | } | |
104 | if (conn) | |
105 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn); | |
106 | else | |
107 | conn_devices = NULL; | |
108 | ||
109 | /* Find all Twinkie devices */ | |
110 | devices = NULL; | |
111 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
112 | for (i = 0; devlist[i]; i++) { | |
113 | if (conn) { | |
114 | usb = NULL; | |
115 | for (l = conn_devices; l; l = l->next) { | |
116 | usb = l->data; | |
117 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
118 | && usb->address == libusb_get_device_address(devlist[i])) | |
119 | break; | |
120 | } | |
121 | if (!l) | |
122 | /* This device matched none of the ones that | |
123 | * matched the conn specification. */ | |
124 | continue; | |
125 | } | |
126 | ||
127 | if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) { | |
128 | sr_warn("Failed to get device descriptor: %s.", | |
129 | libusb_error_name(ret)); | |
130 | continue; | |
131 | } | |
132 | ||
133 | if (des.idVendor != TWINKIE_VID || des.idProduct != TWINKIE_PID) | |
134 | continue; | |
135 | ||
fcc65337 VP |
136 | if ((ret = libusb_get_active_config_descriptor(devlist[i], &cfg)) != 0) { |
137 | sr_warn("Failed to get device configuraton: %s.", | |
138 | libusb_error_name(ret)); | |
139 | continue; | |
140 | } | |
141 | ||
744e43bc VP |
142 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); |
143 | ||
144 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
145 | sdi->status = SR_ST_INITIALIZING; | |
146 | sdi->vendor = g_strdup("Chromium"); | |
147 | sdi->model = g_strdup("Twinkie"); | |
148 | sdi->driver = di; | |
149 | sdi->connection_id = g_strdup(connection_id); | |
150 | ||
fcc65337 VP |
151 | if (vbus_channels && cfg->bNumInterfaces < 3) { |
152 | sr_warn("VBUS channels not available in this firmware."); | |
153 | vbus_channels = 0; | |
154 | } | |
744e43bc VP |
155 | |
156 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) | |
157 | return NULL; | |
158 | sdi->priv = devc; | |
fcc65337 VP |
159 | |
160 | cc_grp = g_malloc0(sizeof(struct sr_channel_group)); | |
161 | cc_grp->name = g_strdup("CCx"); | |
162 | for (j = 0; j < vbus_channels; j++) { | |
163 | vbus_grp[j] = g_malloc0(sizeof(struct sr_channel_group)); | |
164 | vbus_grp[j]->name = g_strdup(j == VBUS_V ? "VBUS_V" | |
165 | : "VBUS_A"); | |
166 | } | |
167 | ||
168 | for (j = 0; chan_defs[j].name; j++) { | |
169 | struct sr_channel_group *grp = cc_grp; | |
170 | if (j >= LOGIC_CHANNELS_COUNT) { /* Analog channels */ | |
171 | if (j - LOGIC_CHANNELS_COUNT >= vbus_channels) | |
172 | break; | |
173 | grp = vbus_grp[j - LOGIC_CHANNELS_COUNT]; | |
174 | } | |
175 | ch = sr_channel_new(sdi, j, chan_defs[j].type, TRUE, | |
176 | chan_defs[j].name); | |
177 | grp->channels = g_slist_append(grp->channels, ch); | |
178 | } | |
179 | sdi->channel_groups = g_slist_append(NULL, cc_grp); | |
180 | for (j = 0; j < vbus_channels; j++) { | |
181 | sdi->channel_groups = g_slist_append(sdi->channel_groups, | |
182 | vbus_grp[j]); | |
183 | sr_analog_init(&devc->vbus_packet[j], | |
184 | &devc->vbus_encoding, | |
185 | &devc->vbus_meaning[j], | |
186 | &devc->vbus_spec, 3); | |
187 | devc->vbus_meaning[j].channels = vbus_grp[j]->channels; | |
188 | } | |
189 | /* other encoding default settings in sr_analog_init are OK (eg float) */ | |
190 | devc->vbus_encoding.is_signed = TRUE; | |
191 | devc->vbus_meaning[VBUS_V].mq = SR_MQ_VOLTAGE; | |
192 | devc->vbus_meaning[VBUS_V].mqflags = SR_MQFLAG_DC; | |
193 | devc->vbus_meaning[VBUS_V].unit = SR_UNIT_VOLT; | |
194 | devc->vbus_meaning[VBUS_A].mq = SR_MQ_CURRENT; | |
195 | devc->vbus_meaning[VBUS_A].unit = SR_UNIT_AMPERE; | |
196 | ||
197 | devc->vbus_channels = vbus_channels; | |
744e43bc VP |
198 | drvc->instances = g_slist_append(drvc->instances, sdi); |
199 | devices = g_slist_append(devices, sdi); | |
200 | ||
201 | sr_dbg("Found a Twinkie dongle."); | |
202 | sdi->status = SR_ST_INACTIVE; | |
203 | sdi->inst_type = SR_INST_USB; | |
204 | sdi->conn = sr_usb_dev_inst_new( | |
205 | libusb_get_bus_number(devlist[i]), | |
206 | libusb_get_device_address(devlist[i]), NULL); | |
207 | } | |
208 | libusb_free_device_list(devlist, 1); | |
209 | g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free); | |
210 | ||
211 | return devices; | |
212 | } | |
213 | ||
fcc65337 | 214 | static int dev_open(struct sr_dev_inst *sdi) |
744e43bc VP |
215 | { |
216 | struct sr_dev_driver *di; | |
217 | libusb_device **devlist; | |
218 | struct sr_usb_dev_inst *usb; | |
219 | struct libusb_device_descriptor des; | |
220 | struct drv_context *drvc; | |
fcc65337 | 221 | struct dev_context *devc; |
744e43bc VP |
222 | int ret, i, device_count; |
223 | char connection_id[64]; | |
224 | ||
225 | di = sdi->driver; | |
fcc65337 | 226 | devc = sdi->priv; |
744e43bc VP |
227 | drvc = di->context; |
228 | usb = sdi->conn; | |
229 | ||
230 | if (sdi->status == SR_ST_ACTIVE) | |
231 | /* Device is already in use. */ | |
232 | return SR_ERR; | |
233 | ||
234 | device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
235 | if (device_count < 0) { | |
236 | sr_err("Failed to get device list: %s.", | |
237 | libusb_error_name(device_count)); | |
238 | return SR_ERR; | |
239 | } | |
240 | ||
241 | for (i = 0; i < device_count; i++) { | |
242 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
243 | sr_err("Failed to get device descriptor: %s.", | |
244 | libusb_error_name(ret)); | |
245 | continue; | |
246 | } | |
247 | ||
248 | if (des.idVendor != TWINKIE_VID || des.idProduct != TWINKIE_PID) | |
249 | continue; | |
250 | ||
251 | if ((sdi->status == SR_ST_INITIALIZING) || | |
252 | (sdi->status == SR_ST_INACTIVE)) { | |
253 | /* | |
254 | * Check device by its physical USB bus/port address. | |
255 | */ | |
256 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
257 | if (strcmp(sdi->connection_id, connection_id)) | |
258 | /* This is not the one. */ | |
259 | continue; | |
260 | } | |
261 | ||
262 | if (!(ret = libusb_open(devlist[i], &usb->devhdl))) { | |
263 | if (usb->address == 0xff) | |
264 | /* | |
265 | * First time we touch this device after FW | |
266 | * upload, so we don't know the address yet. | |
267 | */ | |
268 | usb->address = libusb_get_device_address(devlist[i]); | |
269 | } else { | |
270 | sr_err("Failed to open device: %s.", | |
271 | libusb_error_name(ret)); | |
272 | break; | |
273 | } | |
274 | ||
275 | ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE); | |
276 | if (ret == LIBUSB_ERROR_BUSY) { | |
277 | sr_err("Unable to claim USB interface. Another " | |
278 | "program or driver has already claimed it."); | |
279 | break; | |
280 | } else if (ret == LIBUSB_ERROR_NO_DEVICE) { | |
281 | sr_err("Device has been disconnected."); | |
282 | break; | |
283 | } else if (ret != 0) { | |
284 | sr_err("Unable to claim interface: %s.", | |
285 | libusb_error_name(ret)); | |
286 | break; | |
287 | } | |
fcc65337 VP |
288 | if (devc->vbus_channels && |
289 | (ret = libusb_claim_interface(usb->devhdl, USB_COMMANDS_IFACE))) { | |
290 | sr_err("Unable to claim commands interface %d/%s.", ret, | |
291 | libusb_error_name(ret)); | |
292 | /* Cannot use the analog channels for VBUS. */ | |
293 | devc->vbus_channels = 0; | |
294 | } | |
744e43bc VP |
295 | |
296 | if ((ret = twinkie_init_device(sdi)) != SR_OK) { | |
297 | sr_err("Failed to init device."); | |
298 | break; | |
299 | } | |
300 | ||
301 | sdi->status = SR_ST_ACTIVE; | |
302 | sr_info("Opened device %d.%d, interface %d.", | |
303 | usb->bus, usb->address, USB_INTERFACE); | |
304 | ||
305 | break; | |
306 | } | |
307 | libusb_free_device_list(devlist, 1); | |
308 | ||
309 | if (sdi->status != SR_ST_ACTIVE) { | |
310 | if (usb->devhdl) { | |
311 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
312 | libusb_close(usb->devhdl); | |
313 | usb->devhdl = NULL; | |
314 | } | |
315 | return SR_ERR; | |
316 | } | |
317 | ||
318 | return SR_OK; | |
319 | } | |
320 | ||
744e43bc VP |
321 | static int dev_close(struct sr_dev_inst *sdi) |
322 | { | |
323 | struct sr_usb_dev_inst *usb; | |
fcc65337 | 324 | struct dev_context *devc; |
744e43bc VP |
325 | |
326 | usb = sdi->conn; | |
327 | if (usb->devhdl == NULL) | |
328 | return SR_ERR; | |
329 | ||
fcc65337 VP |
330 | sr_info("Closing device %d.%d.", usb->bus, usb->address); |
331 | devc = sdi->priv; | |
332 | if (devc->vbus_channels) | |
333 | libusb_release_interface(usb->devhdl, USB_COMMANDS_IFACE); | |
744e43bc VP |
334 | libusb_release_interface(usb->devhdl, USB_INTERFACE); |
335 | libusb_close(usb->devhdl); | |
336 | usb->devhdl = NULL; | |
337 | sdi->status = SR_ST_INACTIVE; | |
338 | ||
339 | return SR_OK; | |
340 | } | |
341 | ||
744e43bc VP |
342 | static int config_get(uint32_t key, GVariant **data, |
343 | const struct sr_dev_inst *sdi, | |
344 | const struct sr_channel_group *cg) | |
345 | { | |
346 | struct sr_usb_dev_inst *usb; | |
347 | char str[128]; | |
348 | int ret; | |
349 | ||
350 | (void)cg; | |
351 | ||
352 | ret = SR_OK; | |
353 | switch (key) { | |
354 | case SR_CONF_CONN: | |
355 | if (!sdi || !sdi->conn) | |
356 | return SR_ERR_ARG; | |
357 | usb = sdi->conn; | |
358 | if (usb->address == 255) | |
359 | /* Device still needs to re-enumerate after firmware | |
360 | * upload, so we don't know its (future) address. */ | |
361 | return SR_ERR; | |
362 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
363 | *data = g_variant_new_string(str); | |
364 | break; | |
365 | case SR_CONF_SAMPLERATE: | |
366 | *data = g_variant_new_uint64(SAMPLE_RATE); | |
367 | break; | |
368 | default: | |
369 | return SR_ERR_NA; | |
370 | } | |
371 | ||
372 | return ret; | |
373 | } | |
374 | ||
375 | static int config_set(uint32_t key, GVariant *data, | |
376 | const struct sr_dev_inst *sdi, | |
377 | const struct sr_channel_group *cg) | |
378 | { | |
379 | struct dev_context *devc; | |
380 | int ret; | |
381 | ||
382 | (void)cg; | |
383 | ||
384 | if (sdi->status != SR_ST_ACTIVE) | |
385 | return SR_ERR_DEV_CLOSED; | |
386 | ||
387 | devc = sdi->priv; | |
388 | ||
389 | ret = SR_OK; | |
390 | switch (key) { | |
391 | case SR_CONF_LIMIT_SAMPLES: | |
392 | devc->limit_samples = g_variant_get_uint64(data); | |
393 | break; | |
394 | default: | |
395 | ret = SR_ERR_NA; | |
396 | } | |
397 | ||
398 | return ret; | |
399 | } | |
400 | ||
401 | static int config_list(uint32_t key, GVariant **data, | |
402 | const struct sr_dev_inst *sdi, | |
403 | const struct sr_channel_group *cg) | |
404 | { | |
405 | int ret; | |
406 | ||
407 | (void)sdi; | |
408 | (void)cg; | |
409 | ||
410 | ret = SR_OK; | |
411 | switch (key) { | |
412 | case SR_CONF_SCAN_OPTIONS: | |
413 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
414 | hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t)); | |
415 | break; | |
416 | case SR_CONF_DEVICE_OPTIONS: | |
417 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
418 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
419 | break; | |
420 | default: | |
421 | return SR_ERR_NA; | |
422 | } | |
423 | ||
424 | return ret; | |
425 | } | |
426 | ||
427 | static void abort_acquisition(struct dev_context *devc) | |
428 | { | |
429 | int i; | |
430 | ||
431 | devc->sent_samples = -1; | |
432 | ||
433 | for (i = devc->num_transfers - 1; i >= 0; i--) { | |
434 | if (devc->transfers[i]) | |
435 | libusb_cancel_transfer(devc->transfers[i]); | |
436 | } | |
437 | } | |
438 | ||
439 | static int receive_data(int fd, int revents, void *cb_data) | |
440 | { | |
441 | struct timeval tv; | |
442 | struct dev_context *devc; | |
443 | struct drv_context *drvc; | |
444 | const struct sr_dev_inst *sdi; | |
445 | struct sr_dev_driver *di; | |
446 | ||
447 | (void)fd; | |
448 | (void)revents; | |
449 | ||
450 | sdi = cb_data; | |
451 | di = sdi->driver; | |
452 | drvc = di->context; | |
453 | devc = sdi->priv; | |
454 | ||
455 | tv.tv_sec = tv.tv_usec = 0; | |
456 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
457 | ||
458 | if (devc->sent_samples == -2) { | |
459 | abort_acquisition(devc); | |
460 | } | |
461 | ||
462 | return TRUE; | |
463 | } | |
464 | ||
465 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
466 | { | |
467 | struct sr_dev_driver *di = sdi->driver; | |
468 | struct dev_context *devc; | |
469 | struct drv_context *drvc; | |
470 | struct sr_usb_dev_inst *usb; | |
471 | struct libusb_transfer *transfer; | |
fcc65337 | 472 | unsigned int i, timeout, num_transfers, cc_transfers; |
744e43bc VP |
473 | int ret; |
474 | unsigned char *buf; | |
475 | size_t size, convsize; | |
476 | ||
477 | if (sdi->status != SR_ST_ACTIVE) | |
478 | return SR_ERR_DEV_CLOSED; | |
479 | ||
480 | drvc = di->context; | |
481 | devc = sdi->priv; | |
482 | usb = sdi->conn; | |
483 | ||
484 | devc->sent_samples = 0; | |
485 | /* reset per-CC context */ | |
486 | memset(devc->cc, 0, sizeof(devc->cc)); | |
487 | ||
488 | timeout = 1000; | |
fcc65337 | 489 | cc_transfers = num_transfers = 10; |
744e43bc VP |
490 | size = 10*1024; |
491 | convsize = size * 8 * 256 /* largest size : only rollbacks/no edges */; | |
492 | devc->submitted_transfers = 0; | |
fcc65337 VP |
493 | if (devc->vbus_channels) |
494 | num_transfers += 2; | |
744e43bc VP |
495 | |
496 | devc->convbuffer_size = convsize; | |
497 | if (!(devc->convbuffer = g_try_malloc(convsize))) { | |
498 | sr_err("Conversion buffer malloc failed."); | |
499 | return SR_ERR_MALLOC; | |
500 | } | |
501 | memset(devc->convbuffer, 0, devc->convbuffer_size); | |
502 | ||
503 | devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers); | |
504 | if (!devc->transfers) { | |
505 | sr_err("USB transfers malloc failed."); | |
506 | g_free(devc->convbuffer); | |
507 | return SR_ERR_MALLOC; | |
508 | } | |
509 | ||
510 | devc->num_transfers = num_transfers; | |
fcc65337 | 511 | for (i = 0; i < cc_transfers; i++) { |
744e43bc VP |
512 | if (!(buf = g_try_malloc(size))) { |
513 | sr_err("USB transfer buffer malloc failed."); | |
514 | if (devc->submitted_transfers) | |
515 | abort_acquisition(devc); | |
516 | else { | |
517 | g_free(devc->transfers); | |
518 | g_free(devc->convbuffer); | |
519 | } | |
520 | return SR_ERR_MALLOC; | |
521 | } | |
522 | transfer = libusb_alloc_transfer(0); | |
523 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
524 | 3 | LIBUSB_ENDPOINT_IN, buf, size, | |
525 | twinkie_receive_transfer, (void *)sdi, timeout); | |
526 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
527 | sr_err("Failed to submit transfer: %s.", | |
528 | libusb_error_name(ret)); | |
529 | libusb_free_transfer(transfer); | |
530 | g_free(buf); | |
531 | abort_acquisition(devc); | |
532 | return SR_ERR; | |
533 | } | |
534 | devc->transfers[i] = transfer; | |
535 | devc->submitted_transfers++; | |
536 | } | |
fcc65337 VP |
537 | if (devc->vbus_channels) { |
538 | struct libusb_transfer *out_xfer = libusb_alloc_transfer(0); | |
539 | struct libusb_transfer *in_xfer = libusb_alloc_transfer(0); | |
540 | libusb_fill_bulk_transfer(out_xfer, usb->devhdl, | |
541 | 2 | LIBUSB_ENDPOINT_OUT, (uint8_t *)vbus_cmd, | |
542 | sizeof(vbus_cmd) - 1, twinkie_vbus_sent, | |
543 | (void *)sdi, timeout); | |
544 | libusb_fill_bulk_transfer(in_xfer, usb->devhdl, | |
545 | 2 | LIBUSB_ENDPOINT_IN, (uint8_t *)devc->vbus_data, | |
546 | sizeof(devc->vbus_data), | |
547 | twinkie_vbus_recv, (void *)sdi, timeout); | |
548 | if ((ret = libusb_submit_transfer(out_xfer)) != 0) { | |
549 | sr_err("Failed to submit VBUS transfer: %s.", | |
550 | libusb_error_name(ret)); | |
551 | libusb_free_transfer(out_xfer); | |
552 | abort_acquisition(devc); | |
553 | return SR_ERR; | |
554 | } | |
555 | devc->transfers[cc_transfers + 0] = out_xfer; | |
556 | devc->transfers[cc_transfers + 1] = in_xfer; | |
557 | devc->submitted_transfers++; | |
558 | } | |
744e43bc VP |
559 | |
560 | devc->ctx = drvc->sr_ctx; | |
561 | ||
562 | usb_source_add(sdi->session, devc->ctx, timeout, receive_data, | |
563 | (void *)sdi); | |
564 | ||
565 | /* Send header packet to the session bus. */ | |
566 | std_session_send_df_header(sdi); | |
567 | ||
568 | if ((ret = twinkie_start_acquisition(sdi)) != SR_OK) { | |
569 | abort_acquisition(devc); | |
570 | return ret; | |
571 | } | |
572 | ||
573 | return SR_OK; | |
574 | } | |
575 | ||
576 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
577 | { | |
578 | if (sdi->status != SR_ST_ACTIVE) | |
579 | return SR_ERR_DEV_CLOSED; | |
580 | ||
581 | abort_acquisition(sdi->priv); | |
582 | ||
583 | return SR_OK; | |
584 | } | |
585 | ||
586 | static struct sr_dev_driver chromium_twinkie_driver_info = { | |
587 | .name = "chromium-twinkie", | |
588 | .longname = "Chromium Twinkie", | |
589 | .api_version = 1, | |
590 | .init = std_init, | |
591 | .cleanup = std_cleanup, | |
592 | .scan = scan, | |
593 | .dev_list = std_dev_list, | |
fcc65337 | 594 | .dev_clear = NULL, |
744e43bc VP |
595 | .config_get = config_get, |
596 | .config_set = config_set, | |
597 | .config_list = config_list, | |
598 | .dev_open = dev_open, | |
599 | .dev_close = dev_close, | |
600 | .dev_acquisition_start = dev_acquisition_start, | |
601 | .dev_acquisition_stop = dev_acquisition_stop, | |
602 | }; | |
603 | SR_REGISTER_DEV_DRIVER(chromium_twinkie_driver_info); |