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9#include <linux/kernel.h>
10#include <linux/list.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/uaccess.h>
14#include <linux/usb.h>
15#include <linux/videodev2.h>
16#include <linux/vmalloc.h>
17#include <linux/wait.h>
18#include <linux/workqueue.h>
19#include <linux/atomic.h>
20#include <media/v4l2-ctrls.h>
21
22#include "uvcvideo.h"
23
24#define UVC_CTRL_DATA_CURRENT 0
25#define UVC_CTRL_DATA_BACKUP 1
26#define UVC_CTRL_DATA_MIN 2
27#define UVC_CTRL_DATA_MAX 3
28#define UVC_CTRL_DATA_RES 4
29#define UVC_CTRL_DATA_DEF 5
30#define UVC_CTRL_DATA_LAST 6
31
32
33
34
35
36static const struct uvc_control_info uvc_ctrls[] = {
37 {
38 .entity = UVC_GUID_UVC_PROCESSING,
39 .selector = UVC_PU_BRIGHTNESS_CONTROL,
40 .index = 0,
41 .size = 2,
42 .flags = UVC_CTRL_FLAG_SET_CUR
43 | UVC_CTRL_FLAG_GET_RANGE
44 | UVC_CTRL_FLAG_RESTORE,
45 },
46 {
47 .entity = UVC_GUID_UVC_PROCESSING,
48 .selector = UVC_PU_CONTRAST_CONTROL,
49 .index = 1,
50 .size = 2,
51 .flags = UVC_CTRL_FLAG_SET_CUR
52 | UVC_CTRL_FLAG_GET_RANGE
53 | UVC_CTRL_FLAG_RESTORE,
54 },
55 {
56 .entity = UVC_GUID_UVC_PROCESSING,
57 .selector = UVC_PU_HUE_CONTROL,
58 .index = 2,
59 .size = 2,
60 .flags = UVC_CTRL_FLAG_SET_CUR
61 | UVC_CTRL_FLAG_GET_RANGE
62 | UVC_CTRL_FLAG_RESTORE
63 | UVC_CTRL_FLAG_AUTO_UPDATE,
64 },
65 {
66 .entity = UVC_GUID_UVC_PROCESSING,
67 .selector = UVC_PU_SATURATION_CONTROL,
68 .index = 3,
69 .size = 2,
70 .flags = UVC_CTRL_FLAG_SET_CUR
71 | UVC_CTRL_FLAG_GET_RANGE
72 | UVC_CTRL_FLAG_RESTORE,
73 },
74 {
75 .entity = UVC_GUID_UVC_PROCESSING,
76 .selector = UVC_PU_SHARPNESS_CONTROL,
77 .index = 4,
78 .size = 2,
79 .flags = UVC_CTRL_FLAG_SET_CUR
80 | UVC_CTRL_FLAG_GET_RANGE
81 | UVC_CTRL_FLAG_RESTORE,
82 },
83 {
84 .entity = UVC_GUID_UVC_PROCESSING,
85 .selector = UVC_PU_GAMMA_CONTROL,
86 .index = 5,
87 .size = 2,
88 .flags = UVC_CTRL_FLAG_SET_CUR
89 | UVC_CTRL_FLAG_GET_RANGE
90 | UVC_CTRL_FLAG_RESTORE,
91 },
92 {
93 .entity = UVC_GUID_UVC_PROCESSING,
94 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
95 .index = 6,
96 .size = 2,
97 .flags = UVC_CTRL_FLAG_SET_CUR
98 | UVC_CTRL_FLAG_GET_RANGE
99 | UVC_CTRL_FLAG_RESTORE
100 | UVC_CTRL_FLAG_AUTO_UPDATE,
101 },
102 {
103 .entity = UVC_GUID_UVC_PROCESSING,
104 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
105 .index = 7,
106 .size = 4,
107 .flags = UVC_CTRL_FLAG_SET_CUR
108 | UVC_CTRL_FLAG_GET_RANGE
109 | UVC_CTRL_FLAG_RESTORE
110 | UVC_CTRL_FLAG_AUTO_UPDATE,
111 },
112 {
113 .entity = UVC_GUID_UVC_PROCESSING,
114 .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
115 .index = 8,
116 .size = 2,
117 .flags = UVC_CTRL_FLAG_SET_CUR
118 | UVC_CTRL_FLAG_GET_RANGE
119 | UVC_CTRL_FLAG_RESTORE,
120 },
121 {
122 .entity = UVC_GUID_UVC_PROCESSING,
123 .selector = UVC_PU_GAIN_CONTROL,
124 .index = 9,
125 .size = 2,
126 .flags = UVC_CTRL_FLAG_SET_CUR
127 | UVC_CTRL_FLAG_GET_RANGE
128 | UVC_CTRL_FLAG_RESTORE,
129 },
130 {
131 .entity = UVC_GUID_UVC_PROCESSING,
132 .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
133 .index = 10,
134 .size = 1,
135 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
136 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
137 },
138 {
139 .entity = UVC_GUID_UVC_PROCESSING,
140 .selector = UVC_PU_HUE_AUTO_CONTROL,
141 .index = 11,
142 .size = 1,
143 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
144 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
145 },
146 {
147 .entity = UVC_GUID_UVC_PROCESSING,
148 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
149 .index = 12,
150 .size = 1,
151 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
152 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
153 },
154 {
155 .entity = UVC_GUID_UVC_PROCESSING,
156 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
157 .index = 13,
158 .size = 1,
159 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
160 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
161 },
162 {
163 .entity = UVC_GUID_UVC_PROCESSING,
164 .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL,
165 .index = 14,
166 .size = 2,
167 .flags = UVC_CTRL_FLAG_SET_CUR
168 | UVC_CTRL_FLAG_GET_RANGE
169 | UVC_CTRL_FLAG_RESTORE,
170 },
171 {
172 .entity = UVC_GUID_UVC_PROCESSING,
173 .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL,
174 .index = 15,
175 .size = 2,
176 .flags = UVC_CTRL_FLAG_SET_CUR
177 | UVC_CTRL_FLAG_GET_RANGE
178 | UVC_CTRL_FLAG_RESTORE,
179 },
180 {
181 .entity = UVC_GUID_UVC_PROCESSING,
182 .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL,
183 .index = 16,
184 .size = 1,
185 .flags = UVC_CTRL_FLAG_GET_CUR,
186 },
187 {
188 .entity = UVC_GUID_UVC_PROCESSING,
189 .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL,
190 .index = 17,
191 .size = 1,
192 .flags = UVC_CTRL_FLAG_GET_CUR,
193 },
194 {
195 .entity = UVC_GUID_UVC_CAMERA,
196 .selector = UVC_CT_SCANNING_MODE_CONTROL,
197 .index = 0,
198 .size = 1,
199 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
200 | UVC_CTRL_FLAG_RESTORE,
201 },
202 {
203 .entity = UVC_GUID_UVC_CAMERA,
204 .selector = UVC_CT_AE_MODE_CONTROL,
205 .index = 1,
206 .size = 1,
207 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
208 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_GET_RES
209 | UVC_CTRL_FLAG_RESTORE,
210 },
211 {
212 .entity = UVC_GUID_UVC_CAMERA,
213 .selector = UVC_CT_AE_PRIORITY_CONTROL,
214 .index = 2,
215 .size = 1,
216 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
217 | UVC_CTRL_FLAG_RESTORE,
218 },
219 {
220 .entity = UVC_GUID_UVC_CAMERA,
221 .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
222 .index = 3,
223 .size = 4,
224 .flags = UVC_CTRL_FLAG_SET_CUR
225 | UVC_CTRL_FLAG_GET_RANGE
226 | UVC_CTRL_FLAG_RESTORE
227 | UVC_CTRL_FLAG_AUTO_UPDATE,
228 },
229 {
230 .entity = UVC_GUID_UVC_CAMERA,
231 .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL,
232 .index = 4,
233 .size = 1,
234 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE,
235 },
236 {
237 .entity = UVC_GUID_UVC_CAMERA,
238 .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
239 .index = 5,
240 .size = 2,
241 .flags = UVC_CTRL_FLAG_SET_CUR
242 | UVC_CTRL_FLAG_GET_RANGE
243 | UVC_CTRL_FLAG_RESTORE
244 | UVC_CTRL_FLAG_AUTO_UPDATE,
245 },
246 {
247 .entity = UVC_GUID_UVC_CAMERA,
248 .selector = UVC_CT_FOCUS_RELATIVE_CONTROL,
249 .index = 6,
250 .size = 2,
251 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
252 | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
253 | UVC_CTRL_FLAG_GET_DEF
254 | UVC_CTRL_FLAG_AUTO_UPDATE,
255 },
256 {
257 .entity = UVC_GUID_UVC_CAMERA,
258 .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
259 .index = 7,
260 .size = 2,
261 .flags = UVC_CTRL_FLAG_SET_CUR
262 | UVC_CTRL_FLAG_GET_RANGE
263 | UVC_CTRL_FLAG_RESTORE
264 | UVC_CTRL_FLAG_AUTO_UPDATE,
265 },
266 {
267 .entity = UVC_GUID_UVC_CAMERA,
268 .selector = UVC_CT_IRIS_RELATIVE_CONTROL,
269 .index = 8,
270 .size = 1,
271 .flags = UVC_CTRL_FLAG_SET_CUR
272 | UVC_CTRL_FLAG_AUTO_UPDATE,
273 },
274 {
275 .entity = UVC_GUID_UVC_CAMERA,
276 .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
277 .index = 9,
278 .size = 2,
279 .flags = UVC_CTRL_FLAG_SET_CUR
280 | UVC_CTRL_FLAG_GET_RANGE
281 | UVC_CTRL_FLAG_RESTORE
282 | UVC_CTRL_FLAG_AUTO_UPDATE,
283 },
284 {
285 .entity = UVC_GUID_UVC_CAMERA,
286 .selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
287 .index = 10,
288 .size = 3,
289 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
290 | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
291 | UVC_CTRL_FLAG_GET_DEF
292 | UVC_CTRL_FLAG_AUTO_UPDATE,
293 },
294 {
295 .entity = UVC_GUID_UVC_CAMERA,
296 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
297 .index = 11,
298 .size = 8,
299 .flags = UVC_CTRL_FLAG_SET_CUR
300 | UVC_CTRL_FLAG_GET_RANGE
301 | UVC_CTRL_FLAG_RESTORE
302 | UVC_CTRL_FLAG_AUTO_UPDATE,
303 },
304 {
305 .entity = UVC_GUID_UVC_CAMERA,
306 .selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
307 .index = 12,
308 .size = 4,
309 .flags = UVC_CTRL_FLAG_SET_CUR
310 | UVC_CTRL_FLAG_GET_RANGE
311 | UVC_CTRL_FLAG_AUTO_UPDATE,
312 },
313 {
314 .entity = UVC_GUID_UVC_CAMERA,
315 .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL,
316 .index = 13,
317 .size = 2,
318 .flags = UVC_CTRL_FLAG_SET_CUR
319 | UVC_CTRL_FLAG_GET_RANGE
320 | UVC_CTRL_FLAG_RESTORE
321 | UVC_CTRL_FLAG_AUTO_UPDATE,
322 },
323 {
324 .entity = UVC_GUID_UVC_CAMERA,
325 .selector = UVC_CT_ROLL_RELATIVE_CONTROL,
326 .index = 14,
327 .size = 2,
328 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
329 | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
330 | UVC_CTRL_FLAG_GET_DEF
331 | UVC_CTRL_FLAG_AUTO_UPDATE,
332 },
333 {
334 .entity = UVC_GUID_UVC_CAMERA,
335 .selector = UVC_CT_FOCUS_AUTO_CONTROL,
336 .index = 17,
337 .size = 1,
338 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
339 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
340 },
341 {
342 .entity = UVC_GUID_UVC_CAMERA,
343 .selector = UVC_CT_PRIVACY_CONTROL,
344 .index = 18,
345 .size = 1,
346 .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
347 | UVC_CTRL_FLAG_RESTORE
348 | UVC_CTRL_FLAG_AUTO_UPDATE,
349 },
350 {
351 .entity = UVC_GUID_EXT_GPIO_CONTROLLER,
352 .selector = UVC_CT_PRIVACY_CONTROL,
353 .index = 0,
354 .size = 1,
355 .flags = UVC_CTRL_FLAG_GET_CUR
356 | UVC_CTRL_FLAG_AUTO_UPDATE,
357 },
358};
359
360static const u32 uvc_control_classes[] = {
361 V4L2_CID_CAMERA_CLASS,
362 V4L2_CID_USER_CLASS,
363};
364
365static const struct uvc_menu_info power_line_frequency_controls[] = {
366 { 0, "Disabled" },
367 { 1, "50 Hz" },
368 { 2, "60 Hz" },
369};
370
371static const struct uvc_menu_info exposure_auto_controls[] = {
372 { 2, "Auto Mode" },
373 { 1, "Manual Mode" },
374 { 4, "Shutter Priority Mode" },
375 { 8, "Aperture Priority Mode" },
376};
377
378static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping,
379 u8 query, const u8 *data)
380{
381 s8 zoom = (s8)data[0];
382
383 switch (query) {
384 case UVC_GET_CUR:
385 return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]);
386
387 case UVC_GET_MIN:
388 case UVC_GET_MAX:
389 case UVC_GET_RES:
390 case UVC_GET_DEF:
391 default:
392 return data[2];
393 }
394}
395
396static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping,
397 s32 value, u8 *data)
398{
399 data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
400 data[2] = min((int)abs(value), 0xff);
401}
402
403static s32 uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping,
404 u8 query, const u8 *data)
405{
406 unsigned int first = mapping->offset / 8;
407 s8 rel = (s8)data[first];
408
409 switch (query) {
410 case UVC_GET_CUR:
411 return (rel == 0) ? 0 : (rel > 0 ? data[first+1]
412 : -data[first+1]);
413 case UVC_GET_MIN:
414 return -data[first+1];
415 case UVC_GET_MAX:
416 case UVC_GET_RES:
417 case UVC_GET_DEF:
418 default:
419 return data[first+1];
420 }
421}
422
423static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping,
424 s32 value, u8 *data)
425{
426 unsigned int first = mapping->offset / 8;
427
428 data[first] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
429 data[first+1] = min_t(int, abs(value), 0xff);
430}
431
432static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
433 {
434 .id = V4L2_CID_BRIGHTNESS,
435 .entity = UVC_GUID_UVC_PROCESSING,
436 .selector = UVC_PU_BRIGHTNESS_CONTROL,
437 .size = 16,
438 .offset = 0,
439 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
440 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
441 },
442 {
443 .id = V4L2_CID_CONTRAST,
444 .entity = UVC_GUID_UVC_PROCESSING,
445 .selector = UVC_PU_CONTRAST_CONTROL,
446 .size = 16,
447 .offset = 0,
448 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
449 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
450 },
451 {
452 .id = V4L2_CID_HUE,
453 .entity = UVC_GUID_UVC_PROCESSING,
454 .selector = UVC_PU_HUE_CONTROL,
455 .size = 16,
456 .offset = 0,
457 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
458 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
459 .master_id = V4L2_CID_HUE_AUTO,
460 .master_manual = 0,
461 },
462 {
463 .id = V4L2_CID_SATURATION,
464 .entity = UVC_GUID_UVC_PROCESSING,
465 .selector = UVC_PU_SATURATION_CONTROL,
466 .size = 16,
467 .offset = 0,
468 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
469 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
470 },
471 {
472 .id = V4L2_CID_SHARPNESS,
473 .entity = UVC_GUID_UVC_PROCESSING,
474 .selector = UVC_PU_SHARPNESS_CONTROL,
475 .size = 16,
476 .offset = 0,
477 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
478 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
479 },
480 {
481 .id = V4L2_CID_GAMMA,
482 .entity = UVC_GUID_UVC_PROCESSING,
483 .selector = UVC_PU_GAMMA_CONTROL,
484 .size = 16,
485 .offset = 0,
486 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
487 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
488 },
489 {
490 .id = V4L2_CID_BACKLIGHT_COMPENSATION,
491 .entity = UVC_GUID_UVC_PROCESSING,
492 .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
493 .size = 16,
494 .offset = 0,
495 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
496 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
497 },
498 {
499 .id = V4L2_CID_GAIN,
500 .entity = UVC_GUID_UVC_PROCESSING,
501 .selector = UVC_PU_GAIN_CONTROL,
502 .size = 16,
503 .offset = 0,
504 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
505 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
506 },
507 {
508 .id = V4L2_CID_POWER_LINE_FREQUENCY,
509 .entity = UVC_GUID_UVC_PROCESSING,
510 .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
511 .size = 2,
512 .offset = 0,
513 .v4l2_type = V4L2_CTRL_TYPE_MENU,
514 .data_type = UVC_CTRL_DATA_TYPE_ENUM,
515 .menu_info = power_line_frequency_controls,
516 .menu_count = ARRAY_SIZE(power_line_frequency_controls),
517 },
518 {
519 .id = V4L2_CID_HUE_AUTO,
520 .entity = UVC_GUID_UVC_PROCESSING,
521 .selector = UVC_PU_HUE_AUTO_CONTROL,
522 .size = 1,
523 .offset = 0,
524 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
525 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
526 .slave_ids = { V4L2_CID_HUE, },
527 },
528 {
529 .id = V4L2_CID_EXPOSURE_AUTO,
530 .entity = UVC_GUID_UVC_CAMERA,
531 .selector = UVC_CT_AE_MODE_CONTROL,
532 .size = 4,
533 .offset = 0,
534 .v4l2_type = V4L2_CTRL_TYPE_MENU,
535 .data_type = UVC_CTRL_DATA_TYPE_BITMASK,
536 .menu_info = exposure_auto_controls,
537 .menu_count = ARRAY_SIZE(exposure_auto_controls),
538 .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, },
539 },
540 {
541 .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY,
542 .entity = UVC_GUID_UVC_CAMERA,
543 .selector = UVC_CT_AE_PRIORITY_CONTROL,
544 .size = 1,
545 .offset = 0,
546 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
547 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
548 },
549 {
550 .id = V4L2_CID_EXPOSURE_ABSOLUTE,
551 .entity = UVC_GUID_UVC_CAMERA,
552 .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
553 .size = 32,
554 .offset = 0,
555 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
556 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
557 .master_id = V4L2_CID_EXPOSURE_AUTO,
558 .master_manual = V4L2_EXPOSURE_MANUAL,
559 },
560 {
561 .id = V4L2_CID_AUTO_WHITE_BALANCE,
562 .entity = UVC_GUID_UVC_PROCESSING,
563 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
564 .size = 1,
565 .offset = 0,
566 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
567 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
568 .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, },
569 },
570 {
571 .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
572 .entity = UVC_GUID_UVC_PROCESSING,
573 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
574 .size = 16,
575 .offset = 0,
576 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
577 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
578 .master_id = V4L2_CID_AUTO_WHITE_BALANCE,
579 .master_manual = 0,
580 },
581 {
582 .id = V4L2_CID_AUTO_WHITE_BALANCE,
583 .entity = UVC_GUID_UVC_PROCESSING,
584 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
585 .size = 1,
586 .offset = 0,
587 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
588 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
589 .slave_ids = { V4L2_CID_BLUE_BALANCE,
590 V4L2_CID_RED_BALANCE },
591 },
592 {
593 .id = V4L2_CID_BLUE_BALANCE,
594 .entity = UVC_GUID_UVC_PROCESSING,
595 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
596 .size = 16,
597 .offset = 0,
598 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
599 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
600 .master_id = V4L2_CID_AUTO_WHITE_BALANCE,
601 .master_manual = 0,
602 },
603 {
604 .id = V4L2_CID_RED_BALANCE,
605 .entity = UVC_GUID_UVC_PROCESSING,
606 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
607 .size = 16,
608 .offset = 16,
609 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
610 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
611 .master_id = V4L2_CID_AUTO_WHITE_BALANCE,
612 .master_manual = 0,
613 },
614 {
615 .id = V4L2_CID_FOCUS_ABSOLUTE,
616 .entity = UVC_GUID_UVC_CAMERA,
617 .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
618 .size = 16,
619 .offset = 0,
620 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
621 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
622 .master_id = V4L2_CID_FOCUS_AUTO,
623 .master_manual = 0,
624 },
625 {
626 .id = V4L2_CID_FOCUS_AUTO,
627 .entity = UVC_GUID_UVC_CAMERA,
628 .selector = UVC_CT_FOCUS_AUTO_CONTROL,
629 .size = 1,
630 .offset = 0,
631 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
632 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
633 .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, },
634 },
635 {
636 .id = V4L2_CID_IRIS_ABSOLUTE,
637 .entity = UVC_GUID_UVC_CAMERA,
638 .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
639 .size = 16,
640 .offset = 0,
641 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
642 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
643 },
644 {
645 .id = V4L2_CID_IRIS_RELATIVE,
646 .entity = UVC_GUID_UVC_CAMERA,
647 .selector = UVC_CT_IRIS_RELATIVE_CONTROL,
648 .size = 8,
649 .offset = 0,
650 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
651 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
652 },
653 {
654 .id = V4L2_CID_ZOOM_ABSOLUTE,
655 .entity = UVC_GUID_UVC_CAMERA,
656 .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
657 .size = 16,
658 .offset = 0,
659 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
660 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
661 },
662 {
663 .id = V4L2_CID_ZOOM_CONTINUOUS,
664 .entity = UVC_GUID_UVC_CAMERA,
665 .selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
666 .size = 0,
667 .offset = 0,
668 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
669 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
670 .get = uvc_ctrl_get_zoom,
671 .set = uvc_ctrl_set_zoom,
672 },
673 {
674 .id = V4L2_CID_PAN_ABSOLUTE,
675 .entity = UVC_GUID_UVC_CAMERA,
676 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
677 .size = 32,
678 .offset = 0,
679 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
680 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
681 },
682 {
683 .id = V4L2_CID_TILT_ABSOLUTE,
684 .entity = UVC_GUID_UVC_CAMERA,
685 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
686 .size = 32,
687 .offset = 32,
688 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
689 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
690 },
691 {
692 .id = V4L2_CID_PAN_SPEED,
693 .entity = UVC_GUID_UVC_CAMERA,
694 .selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
695 .size = 16,
696 .offset = 0,
697 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
698 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
699 .get = uvc_ctrl_get_rel_speed,
700 .set = uvc_ctrl_set_rel_speed,
701 },
702 {
703 .id = V4L2_CID_TILT_SPEED,
704 .entity = UVC_GUID_UVC_CAMERA,
705 .selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
706 .size = 16,
707 .offset = 16,
708 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
709 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
710 .get = uvc_ctrl_get_rel_speed,
711 .set = uvc_ctrl_set_rel_speed,
712 },
713 {
714 .id = V4L2_CID_PRIVACY,
715 .entity = UVC_GUID_UVC_CAMERA,
716 .selector = UVC_CT_PRIVACY_CONTROL,
717 .size = 1,
718 .offset = 0,
719 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
720 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
721 },
722 {
723 .id = V4L2_CID_PRIVACY,
724 .entity = UVC_GUID_EXT_GPIO_CONTROLLER,
725 .selector = UVC_CT_PRIVACY_CONTROL,
726 .size = 1,
727 .offset = 0,
728 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
729 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
730 },
731};
732
733
734
735
736
737static inline u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id)
738{
739 return ctrl->uvc_data + id * ctrl->info.size;
740}
741
742static inline int uvc_test_bit(const u8 *data, int bit)
743{
744 return (data[bit >> 3] >> (bit & 7)) & 1;
745}
746
747static inline void uvc_clear_bit(u8 *data, int bit)
748{
749 data[bit >> 3] &= ~(1 << (bit & 7));
750}
751
752
753
754
755
756
757static s32 uvc_get_le_value(struct uvc_control_mapping *mapping,
758 u8 query, const u8 *data)
759{
760 int bits = mapping->size;
761 int offset = mapping->offset;
762 s32 value = 0;
763 u8 mask;
764
765 data += offset / 8;
766 offset &= 7;
767 mask = ((1LL << bits) - 1) << offset;
768
769 while (1) {
770 u8 byte = *data & mask;
771 value |= offset > 0 ? (byte >> offset) : (byte << (-offset));
772 bits -= 8 - (offset > 0 ? offset : 0);
773 if (bits <= 0)
774 break;
775
776 offset -= 8;
777 mask = (1 << bits) - 1;
778 data++;
779 }
780
781
782 if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
783 value |= -(value & (1 << (mapping->size - 1)));
784
785 return value;
786}
787
788
789
790
791static void uvc_set_le_value(struct uvc_control_mapping *mapping,
792 s32 value, u8 *data)
793{
794 int bits = mapping->size;
795 int offset = mapping->offset;
796 u8 mask;
797
798
799
800
801
802
803 if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON)
804 value = -1;
805
806 data += offset / 8;
807 offset &= 7;
808
809 for (; bits > 0; data++) {
810 mask = ((1LL << bits) - 1) << offset;
811 *data = (*data & ~mask) | ((value << offset) & mask);
812 value >>= offset ? offset : 8;
813 bits -= 8 - offset;
814 offset = 0;
815 }
816}
817
818
819
820
821
822static int uvc_entity_match_guid(const struct uvc_entity *entity,
823 const u8 guid[16])
824{
825 return memcmp(entity->guid, guid, sizeof(entity->guid)) == 0;
826}
827
828
829
830
831
832static void __uvc_find_control(struct uvc_entity *entity, u32 v4l2_id,
833 struct uvc_control_mapping **mapping, struct uvc_control **control,
834 int next)
835{
836 struct uvc_control *ctrl;
837 struct uvc_control_mapping *map;
838 unsigned int i;
839
840 if (entity == NULL)
841 return;
842
843 for (i = 0; i < entity->ncontrols; ++i) {
844 ctrl = &entity->controls[i];
845 if (!ctrl->initialized)
846 continue;
847
848 list_for_each_entry(map, &ctrl->info.mappings, list) {
849 if ((map->id == v4l2_id) && !next) {
850 *control = ctrl;
851 *mapping = map;
852 return;
853 }
854
855 if ((*mapping == NULL || (*mapping)->id > map->id) &&
856 (map->id > v4l2_id) && next) {
857 *control = ctrl;
858 *mapping = map;
859 }
860 }
861 }
862}
863
864static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
865 u32 v4l2_id, struct uvc_control_mapping **mapping)
866{
867 struct uvc_control *ctrl = NULL;
868 struct uvc_entity *entity;
869 int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL;
870
871 *mapping = NULL;
872
873
874 v4l2_id &= V4L2_CTRL_ID_MASK;
875
876
877 list_for_each_entry(entity, &chain->entities, chain) {
878 __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next);
879 if (ctrl && !next)
880 return ctrl;
881 }
882
883 if (ctrl == NULL && !next)
884 uvc_dbg(chain->dev, CONTROL, "Control 0x%08x not found\n",
885 v4l2_id);
886
887 return ctrl;
888}
889
890static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain,
891 struct uvc_control *ctrl)
892{
893 int ret;
894
895 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) {
896 ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
897 chain->dev->intfnum, ctrl->info.selector,
898 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF),
899 ctrl->info.size);
900 if (ret < 0)
901 return ret;
902 }
903
904 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) {
905 ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
906 chain->dev->intfnum, ctrl->info.selector,
907 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN),
908 ctrl->info.size);
909 if (ret < 0)
910 return ret;
911 }
912 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) {
913 ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
914 chain->dev->intfnum, ctrl->info.selector,
915 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX),
916 ctrl->info.size);
917 if (ret < 0)
918 return ret;
919 }
920 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) {
921 ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
922 chain->dev->intfnum, ctrl->info.selector,
923 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES),
924 ctrl->info.size);
925 if (ret < 0) {
926 if (UVC_ENTITY_TYPE(ctrl->entity) !=
927 UVC_VC_EXTENSION_UNIT)
928 return ret;
929
930
931
932
933
934 uvc_warn_once(chain->dev, UVC_WARN_XU_GET_RES,
935 "UVC non compliance - GET_RES failed on "
936 "an XU control. Enabling workaround.\n");
937 memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), 0,
938 ctrl->info.size);
939 }
940 }
941
942 ctrl->cached = 1;
943 return 0;
944}
945
946static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping,
947 const u8 *data)
948{
949 s32 value = mapping->get(mapping, UVC_GET_CUR, data);
950
951 if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
952 const struct uvc_menu_info *menu = mapping->menu_info;
953 unsigned int i;
954
955 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
956 if (menu->value == value) {
957 value = i;
958 break;
959 }
960 }
961 }
962
963 return value;
964}
965
966static int __uvc_ctrl_get(struct uvc_video_chain *chain,
967 struct uvc_control *ctrl, struct uvc_control_mapping *mapping,
968 s32 *value)
969{
970 int ret;
971
972 if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0)
973 return -EACCES;
974
975 if (!ctrl->loaded) {
976 if (ctrl->entity->get_cur) {
977 ret = ctrl->entity->get_cur(chain->dev,
978 ctrl->entity,
979 ctrl->info.selector,
980 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
981 ctrl->info.size);
982 } else {
983 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
984 ctrl->entity->id,
985 chain->dev->intfnum,
986 ctrl->info.selector,
987 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
988 ctrl->info.size);
989 }
990 if (ret < 0)
991 return ret;
992
993 ctrl->loaded = 1;
994 }
995
996 *value = __uvc_ctrl_get_value(mapping,
997 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
998
999 return 0;
1000}
1001
1002static int __uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
1003 u32 found_id)
1004{
1005 bool find_next = req_id & V4L2_CTRL_FLAG_NEXT_CTRL;
1006 unsigned int i;
1007
1008 req_id &= V4L2_CTRL_ID_MASK;
1009
1010 for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) {
1011 if (!(chain->ctrl_class_bitmap & BIT(i)))
1012 continue;
1013 if (!find_next) {
1014 if (uvc_control_classes[i] == req_id)
1015 return i;
1016 continue;
1017 }
1018 if (uvc_control_classes[i] > req_id &&
1019 uvc_control_classes[i] < found_id)
1020 return i;
1021 }
1022
1023 return -ENODEV;
1024}
1025
1026static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
1027 u32 found_id, struct v4l2_queryctrl *v4l2_ctrl)
1028{
1029 int idx;
1030
1031 idx = __uvc_query_v4l2_class(chain, req_id, found_id);
1032 if (idx < 0)
1033 return -ENODEV;
1034
1035 memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
1036 v4l2_ctrl->id = uvc_control_classes[idx];
1037 strscpy(v4l2_ctrl->name, v4l2_ctrl_get_name(v4l2_ctrl->id),
1038 sizeof(v4l2_ctrl->name));
1039 v4l2_ctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
1040 v4l2_ctrl->flags = V4L2_CTRL_FLAG_WRITE_ONLY
1041 | V4L2_CTRL_FLAG_READ_ONLY;
1042 return 0;
1043}
1044
1045int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
1046 bool read)
1047{
1048 struct uvc_control_mapping *mapping;
1049 struct uvc_control *ctrl;
1050
1051 if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
1052 return -EACCES;
1053
1054 ctrl = uvc_find_control(chain, v4l2_id, &mapping);
1055 if (!ctrl)
1056 return -EINVAL;
1057
1058 if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read)
1059 return -EACCES;
1060
1061 if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
1062 return -EACCES;
1063
1064 return 0;
1065}
1066
1067static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
1068{
1069 const char *name;
1070
1071 if (map->name)
1072 return map->name;
1073
1074 name = v4l2_ctrl_get_name(map->id);
1075 if (name)
1076 return name;
1077
1078 return "Unknown Control";
1079}
1080
1081static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
1082 struct uvc_control *ctrl,
1083 struct uvc_control_mapping *mapping,
1084 struct v4l2_queryctrl *v4l2_ctrl)
1085{
1086 struct uvc_control_mapping *master_map = NULL;
1087 struct uvc_control *master_ctrl = NULL;
1088 const struct uvc_menu_info *menu;
1089 unsigned int i;
1090
1091 memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
1092 v4l2_ctrl->id = mapping->id;
1093 v4l2_ctrl->type = mapping->v4l2_type;
1094 strscpy(v4l2_ctrl->name, uvc_map_get_name(mapping),
1095 sizeof(v4l2_ctrl->name));
1096 v4l2_ctrl->flags = 0;
1097
1098 if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
1099 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1100 if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
1101 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1102
1103 if (mapping->master_id)
1104 __uvc_find_control(ctrl->entity, mapping->master_id,
1105 &master_map, &master_ctrl, 0);
1106 if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) {
1107 s32 val;
1108 int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
1109 if (ret < 0)
1110 return ret;
1111
1112 if (val != mapping->master_manual)
1113 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
1114 }
1115
1116 if (!ctrl->cached) {
1117 int ret = uvc_ctrl_populate_cache(chain, ctrl);
1118 if (ret < 0)
1119 return ret;
1120 }
1121
1122 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) {
1123 v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF,
1124 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF));
1125 }
1126
1127 switch (mapping->v4l2_type) {
1128 case V4L2_CTRL_TYPE_MENU:
1129 v4l2_ctrl->minimum = 0;
1130 v4l2_ctrl->maximum = mapping->menu_count - 1;
1131 v4l2_ctrl->step = 1;
1132
1133 menu = mapping->menu_info;
1134 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
1135 if (menu->value == v4l2_ctrl->default_value) {
1136 v4l2_ctrl->default_value = i;
1137 break;
1138 }
1139 }
1140
1141 return 0;
1142
1143 case V4L2_CTRL_TYPE_BOOLEAN:
1144 v4l2_ctrl->minimum = 0;
1145 v4l2_ctrl->maximum = 1;
1146 v4l2_ctrl->step = 1;
1147 return 0;
1148
1149 case V4L2_CTRL_TYPE_BUTTON:
1150 v4l2_ctrl->minimum = 0;
1151 v4l2_ctrl->maximum = 0;
1152 v4l2_ctrl->step = 0;
1153 return 0;
1154
1155 default:
1156 break;
1157 }
1158
1159 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN)
1160 v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
1161 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
1162
1163 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
1164 v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
1165 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
1166
1167 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
1168 v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES,
1169 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1170
1171 return 0;
1172}
1173
1174int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
1175 struct v4l2_queryctrl *v4l2_ctrl)
1176{
1177 struct uvc_control *ctrl;
1178 struct uvc_control_mapping *mapping;
1179 int ret;
1180
1181 ret = mutex_lock_interruptible(&chain->ctrl_mutex);
1182 if (ret < 0)
1183 return -ERESTARTSYS;
1184
1185
1186 if (!(v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL)) {
1187 ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, 0, v4l2_ctrl);
1188 if (!ret)
1189 goto done;
1190 }
1191
1192 ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
1193 if (ctrl == NULL) {
1194 ret = -EINVAL;
1195 goto done;
1196 }
1197
1198
1199
1200
1201
1202
1203 if (v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1204 ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, mapping->id,
1205 v4l2_ctrl);
1206 if (!ret)
1207 goto done;
1208 }
1209
1210 ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl);
1211done:
1212 mutex_unlock(&chain->ctrl_mutex);
1213 return ret;
1214}
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
1226 struct v4l2_querymenu *query_menu)
1227{
1228 const struct uvc_menu_info *menu_info;
1229 struct uvc_control_mapping *mapping;
1230 struct uvc_control *ctrl;
1231 u32 index = query_menu->index;
1232 u32 id = query_menu->id;
1233 int ret;
1234
1235 memset(query_menu, 0, sizeof(*query_menu));
1236 query_menu->id = id;
1237 query_menu->index = index;
1238
1239 ret = mutex_lock_interruptible(&chain->ctrl_mutex);
1240 if (ret < 0)
1241 return -ERESTARTSYS;
1242
1243 ctrl = uvc_find_control(chain, query_menu->id, &mapping);
1244 if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
1245 ret = -EINVAL;
1246 goto done;
1247 }
1248
1249 if (query_menu->index >= mapping->menu_count) {
1250 ret = -EINVAL;
1251 goto done;
1252 }
1253
1254 menu_info = &mapping->menu_info[query_menu->index];
1255
1256 if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK &&
1257 (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) {
1258 s32 bitmap;
1259
1260 if (!ctrl->cached) {
1261 ret = uvc_ctrl_populate_cache(chain, ctrl);
1262 if (ret < 0)
1263 goto done;
1264 }
1265
1266 bitmap = mapping->get(mapping, UVC_GET_RES,
1267 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1268 if (!(bitmap & menu_info->value)) {
1269 ret = -EINVAL;
1270 goto done;
1271 }
1272 }
1273
1274 strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name));
1275
1276done:
1277 mutex_unlock(&chain->ctrl_mutex);
1278 return ret;
1279}
1280
1281
1282
1283
1284
1285static void uvc_ctrl_fill_event(struct uvc_video_chain *chain,
1286 struct v4l2_event *ev,
1287 struct uvc_control *ctrl,
1288 struct uvc_control_mapping *mapping,
1289 s32 value, u32 changes)
1290{
1291 struct v4l2_queryctrl v4l2_ctrl;
1292
1293 __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl);
1294
1295 memset(ev, 0, sizeof(*ev));
1296 ev->type = V4L2_EVENT_CTRL;
1297 ev->id = v4l2_ctrl.id;
1298 ev->u.ctrl.value = value;
1299 ev->u.ctrl.changes = changes;
1300 ev->u.ctrl.type = v4l2_ctrl.type;
1301 ev->u.ctrl.flags = v4l2_ctrl.flags;
1302 ev->u.ctrl.minimum = v4l2_ctrl.minimum;
1303 ev->u.ctrl.maximum = v4l2_ctrl.maximum;
1304 ev->u.ctrl.step = v4l2_ctrl.step;
1305 ev->u.ctrl.default_value = v4l2_ctrl.default_value;
1306}
1307
1308
1309
1310
1311
1312
1313
1314
1315static void uvc_ctrl_send_event(struct uvc_video_chain *chain,
1316 struct uvc_fh *handle, struct uvc_control *ctrl,
1317 struct uvc_control_mapping *mapping, s32 value, u32 changes)
1318{
1319 struct v4l2_fh *originator = handle ? &handle->vfh : NULL;
1320 struct v4l2_subscribed_event *sev;
1321 struct v4l2_event ev;
1322
1323 if (list_empty(&mapping->ev_subs))
1324 return;
1325
1326 uvc_ctrl_fill_event(chain, &ev, ctrl, mapping, value, changes);
1327
1328 list_for_each_entry(sev, &mapping->ev_subs, node) {
1329 if (sev->fh != originator ||
1330 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) ||
1331 (changes & V4L2_EVENT_CTRL_CH_FLAGS))
1332 v4l2_event_queue_fh(sev->fh, &ev);
1333 }
1334}
1335
1336
1337
1338
1339
1340
1341static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain,
1342 struct uvc_fh *handle, struct uvc_control *master, u32 slave_id)
1343{
1344 struct uvc_control_mapping *mapping = NULL;
1345 struct uvc_control *ctrl = NULL;
1346 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
1347 s32 val = 0;
1348
1349 __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0);
1350 if (ctrl == NULL)
1351 return;
1352
1353 if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0)
1354 changes |= V4L2_EVENT_CTRL_CH_VALUE;
1355
1356 uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes);
1357}
1358
1359void uvc_ctrl_status_event(struct uvc_video_chain *chain,
1360 struct uvc_control *ctrl, const u8 *data)
1361{
1362 struct uvc_control_mapping *mapping;
1363 struct uvc_fh *handle;
1364 unsigned int i;
1365
1366 mutex_lock(&chain->ctrl_mutex);
1367
1368 handle = ctrl->handle;
1369 ctrl->handle = NULL;
1370
1371 list_for_each_entry(mapping, &ctrl->info.mappings, list) {
1372 s32 value = __uvc_ctrl_get_value(mapping, data);
1373
1374
1375
1376
1377
1378 for (i = 0; i < ARRAY_SIZE(mapping->slave_ids); ++i) {
1379 if (!mapping->slave_ids[i])
1380 break;
1381
1382 uvc_ctrl_send_slave_event(chain, handle, ctrl,
1383 mapping->slave_ids[i]);
1384 }
1385
1386 uvc_ctrl_send_event(chain, handle, ctrl, mapping, value,
1387 V4L2_EVENT_CTRL_CH_VALUE);
1388 }
1389
1390 mutex_unlock(&chain->ctrl_mutex);
1391}
1392
1393static void uvc_ctrl_status_event_work(struct work_struct *work)
1394{
1395 struct uvc_device *dev = container_of(work, struct uvc_device,
1396 async_ctrl.work);
1397 struct uvc_ctrl_work *w = &dev->async_ctrl;
1398 int ret;
1399
1400 uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
1401
1402
1403 w->urb->interval = dev->int_ep->desc.bInterval;
1404 ret = usb_submit_urb(w->urb, GFP_KERNEL);
1405 if (ret < 0)
1406 dev_err(&dev->udev->dev,
1407 "Failed to resubmit status URB (%d).\n", ret);
1408}
1409
1410bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
1411 struct uvc_control *ctrl, const u8 *data)
1412{
1413 struct uvc_device *dev = chain->dev;
1414 struct uvc_ctrl_work *w = &dev->async_ctrl;
1415
1416 if (list_empty(&ctrl->info.mappings)) {
1417 ctrl->handle = NULL;
1418 return false;
1419 }
1420
1421 w->data = data;
1422 w->urb = urb;
1423 w->chain = chain;
1424 w->ctrl = ctrl;
1425
1426 schedule_work(&w->work);
1427
1428 return true;
1429}
1430
1431static bool uvc_ctrl_xctrls_has_control(const struct v4l2_ext_control *xctrls,
1432 unsigned int xctrls_count, u32 id)
1433{
1434 unsigned int i;
1435
1436 for (i = 0; i < xctrls_count; ++i) {
1437 if (xctrls[i].id == id)
1438 return true;
1439 }
1440
1441 return false;
1442}
1443
1444static void uvc_ctrl_send_events(struct uvc_fh *handle,
1445 const struct v4l2_ext_control *xctrls, unsigned int xctrls_count)
1446{
1447 struct uvc_control_mapping *mapping;
1448 struct uvc_control *ctrl;
1449 u32 changes = V4L2_EVENT_CTRL_CH_VALUE;
1450 unsigned int i;
1451 unsigned int j;
1452
1453 for (i = 0; i < xctrls_count; ++i) {
1454 ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping);
1455
1456 if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS)
1457
1458 continue;
1459
1460 for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) {
1461 u32 slave_id = mapping->slave_ids[j];
1462
1463 if (!slave_id)
1464 break;
1465
1466
1467
1468
1469
1470 if (uvc_ctrl_xctrls_has_control(xctrls, xctrls_count,
1471 slave_id))
1472 continue;
1473
1474 uvc_ctrl_send_slave_event(handle->chain, handle, ctrl,
1475 slave_id);
1476 }
1477
1478
1479
1480
1481
1482 if (mapping->master_id &&
1483 uvc_ctrl_xctrls_has_control(xctrls, xctrls_count,
1484 mapping->master_id))
1485 changes |= V4L2_EVENT_CTRL_CH_FLAGS;
1486
1487 uvc_ctrl_send_event(handle->chain, handle, ctrl, mapping,
1488 xctrls[i].value, changes);
1489 }
1490}
1491
1492static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
1493{
1494 struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh);
1495 struct uvc_control_mapping *mapping;
1496 struct uvc_control *ctrl;
1497 int ret;
1498
1499 ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex);
1500 if (ret < 0)
1501 return -ERESTARTSYS;
1502
1503 if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) {
1504 ret = 0;
1505 goto done;
1506 }
1507
1508 ctrl = uvc_find_control(handle->chain, sev->id, &mapping);
1509 if (ctrl == NULL) {
1510 ret = -EINVAL;
1511 goto done;
1512 }
1513
1514 list_add_tail(&sev->node, &mapping->ev_subs);
1515 if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) {
1516 struct v4l2_event ev;
1517 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
1518 s32 val = 0;
1519
1520 if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0)
1521 changes |= V4L2_EVENT_CTRL_CH_VALUE;
1522
1523 uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val,
1524 changes);
1525
1526
1527 sev->elems = elems;
1528 v4l2_event_queue_fh(sev->fh, &ev);
1529 }
1530
1531done:
1532 mutex_unlock(&handle->chain->ctrl_mutex);
1533 return ret;
1534}
1535
1536static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev)
1537{
1538 struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh);
1539
1540 mutex_lock(&handle->chain->ctrl_mutex);
1541 if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0)
1542 goto done;
1543 list_del(&sev->node);
1544done:
1545 mutex_unlock(&handle->chain->ctrl_mutex);
1546}
1547
1548const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = {
1549 .add = uvc_ctrl_add_event,
1550 .del = uvc_ctrl_del_event,
1551 .replace = v4l2_ctrl_replace,
1552 .merge = v4l2_ctrl_merge,
1553};
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579int uvc_ctrl_begin(struct uvc_video_chain *chain)
1580{
1581 return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0;
1582}
1583
1584static int uvc_ctrl_commit_entity(struct uvc_device *dev,
1585 struct uvc_entity *entity, int rollback, struct uvc_control **err_ctrl)
1586{
1587 struct uvc_control *ctrl;
1588 unsigned int i;
1589 int ret;
1590
1591 if (entity == NULL)
1592 return 0;
1593
1594 for (i = 0; i < entity->ncontrols; ++i) {
1595 ctrl = &entity->controls[i];
1596 if (!ctrl->initialized)
1597 continue;
1598
1599
1600
1601
1602
1603
1604
1605 if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE ||
1606 !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
1607 ctrl->loaded = 0;
1608
1609 if (!ctrl->dirty)
1610 continue;
1611
1612 if (!rollback)
1613 ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id,
1614 dev->intfnum, ctrl->info.selector,
1615 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1616 ctrl->info.size);
1617 else
1618 ret = 0;
1619
1620 if (rollback || ret < 0)
1621 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1622 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1623 ctrl->info.size);
1624
1625 ctrl->dirty = 0;
1626
1627 if (ret < 0) {
1628 if (err_ctrl)
1629 *err_ctrl = ctrl;
1630 return ret;
1631 }
1632 }
1633
1634 return 0;
1635}
1636
1637static int uvc_ctrl_find_ctrl_idx(struct uvc_entity *entity,
1638 struct v4l2_ext_controls *ctrls,
1639 struct uvc_control *uvc_control)
1640{
1641 struct uvc_control_mapping *mapping;
1642 struct uvc_control *ctrl_found;
1643 unsigned int i;
1644
1645 if (!entity)
1646 return ctrls->count;
1647
1648 for (i = 0; i < ctrls->count; i++) {
1649 __uvc_find_control(entity, ctrls->controls[i].id, &mapping,
1650 &ctrl_found, 0);
1651 if (uvc_control == ctrl_found)
1652 return i;
1653 }
1654
1655 return ctrls->count;
1656}
1657
1658int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
1659 struct v4l2_ext_controls *ctrls)
1660{
1661 struct uvc_video_chain *chain = handle->chain;
1662 struct uvc_control *err_ctrl;
1663 struct uvc_entity *entity;
1664 int ret = 0;
1665
1666
1667 list_for_each_entry(entity, &chain->entities, chain) {
1668 ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback,
1669 &err_ctrl);
1670 if (ret < 0)
1671 goto done;
1672 }
1673
1674 if (!rollback)
1675 uvc_ctrl_send_events(handle, ctrls->controls, ctrls->count);
1676done:
1677 if (ret < 0 && ctrls)
1678 ctrls->error_idx = uvc_ctrl_find_ctrl_idx(entity, ctrls,
1679 err_ctrl);
1680 mutex_unlock(&chain->ctrl_mutex);
1681 return ret;
1682}
1683
1684int uvc_ctrl_get(struct uvc_video_chain *chain,
1685 struct v4l2_ext_control *xctrl)
1686{
1687 struct uvc_control *ctrl;
1688 struct uvc_control_mapping *mapping;
1689
1690 if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0)
1691 return -EACCES;
1692
1693 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1694 if (ctrl == NULL)
1695 return -EINVAL;
1696
1697 return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value);
1698}
1699
1700int uvc_ctrl_set(struct uvc_fh *handle,
1701 struct v4l2_ext_control *xctrl)
1702{
1703 struct uvc_video_chain *chain = handle->chain;
1704 struct uvc_control *ctrl;
1705 struct uvc_control_mapping *mapping;
1706 s32 value;
1707 u32 step;
1708 s32 min;
1709 s32 max;
1710 int ret;
1711
1712 if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0)
1713 return -EACCES;
1714
1715 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1716 if (ctrl == NULL)
1717 return -EINVAL;
1718 if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
1719 return -EACCES;
1720
1721
1722 switch (mapping->v4l2_type) {
1723 case V4L2_CTRL_TYPE_INTEGER:
1724 if (!ctrl->cached) {
1725 ret = uvc_ctrl_populate_cache(chain, ctrl);
1726 if (ret < 0)
1727 return ret;
1728 }
1729
1730 min = mapping->get(mapping, UVC_GET_MIN,
1731 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
1732 max = mapping->get(mapping, UVC_GET_MAX,
1733 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
1734 step = mapping->get(mapping, UVC_GET_RES,
1735 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1736 if (step == 0)
1737 step = 1;
1738
1739 xctrl->value = min + DIV_ROUND_CLOSEST((u32)(xctrl->value - min),
1740 step) * step;
1741 if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
1742 xctrl->value = clamp(xctrl->value, min, max);
1743 else
1744 xctrl->value = clamp_t(u32, xctrl->value, min, max);
1745 value = xctrl->value;
1746 break;
1747
1748 case V4L2_CTRL_TYPE_BOOLEAN:
1749 xctrl->value = clamp(xctrl->value, 0, 1);
1750 value = xctrl->value;
1751 break;
1752
1753 case V4L2_CTRL_TYPE_MENU:
1754 if (xctrl->value < 0 || xctrl->value >= mapping->menu_count)
1755 return -ERANGE;
1756 value = mapping->menu_info[xctrl->value].value;
1757
1758
1759
1760
1761 if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK &&
1762 (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) {
1763 if (!ctrl->cached) {
1764 ret = uvc_ctrl_populate_cache(chain, ctrl);
1765 if (ret < 0)
1766 return ret;
1767 }
1768
1769 step = mapping->get(mapping, UVC_GET_RES,
1770 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1771 if (!(step & value))
1772 return -EINVAL;
1773 }
1774
1775 break;
1776
1777 default:
1778 value = xctrl->value;
1779 break;
1780 }
1781
1782
1783
1784
1785
1786 if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) {
1787 if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) {
1788 memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1789 0, ctrl->info.size);
1790 } else {
1791 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
1792 ctrl->entity->id, chain->dev->intfnum,
1793 ctrl->info.selector,
1794 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1795 ctrl->info.size);
1796 if (ret < 0)
1797 return ret;
1798 }
1799
1800 ctrl->loaded = 1;
1801 }
1802
1803
1804 if (!ctrl->dirty) {
1805 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1806 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1807 ctrl->info.size);
1808 }
1809
1810 mapping->set(mapping, value,
1811 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
1812
1813 if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS)
1814 ctrl->handle = handle;
1815
1816 ctrl->dirty = 1;
1817 ctrl->modified = 1;
1818 return 0;
1819}
1820
1821
1822
1823
1824
1825
1826
1827
1828static int uvc_ctrl_get_flags(struct uvc_device *dev,
1829 const struct uvc_control *ctrl,
1830 struct uvc_control_info *info)
1831{
1832 u8 *data;
1833 int ret;
1834
1835 data = kmalloc(1, GFP_KERNEL);
1836 if (data == NULL)
1837 return -ENOMEM;
1838
1839 if (ctrl->entity->get_info)
1840 ret = ctrl->entity->get_info(dev, ctrl->entity,
1841 ctrl->info.selector, data);
1842 else
1843 ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id,
1844 dev->intfnum, info->selector, data, 1);
1845 if (!ret)
1846 info->flags |= (data[0] & UVC_CONTROL_CAP_GET ?
1847 UVC_CTRL_FLAG_GET_CUR : 0)
1848 | (data[0] & UVC_CONTROL_CAP_SET ?
1849 UVC_CTRL_FLAG_SET_CUR : 0)
1850 | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ?
1851 UVC_CTRL_FLAG_AUTO_UPDATE : 0)
1852 | (data[0] & UVC_CONTROL_CAP_ASYNCHRONOUS ?
1853 UVC_CTRL_FLAG_ASYNCHRONOUS : 0);
1854
1855 kfree(data);
1856 return ret;
1857}
1858
1859static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev,
1860 const struct uvc_control *ctrl, struct uvc_control_info *info)
1861{
1862 struct uvc_ctrl_fixup {
1863 struct usb_device_id id;
1864 u8 entity;
1865 u8 selector;
1866 u8 flags;
1867 };
1868
1869 static const struct uvc_ctrl_fixup fixups[] = {
1870 { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1,
1871 UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1872 UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
1873 UVC_CTRL_FLAG_AUTO_UPDATE },
1874 { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1,
1875 UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1876 UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
1877 UVC_CTRL_FLAG_AUTO_UPDATE },
1878 { { USB_DEVICE(0x046d, 0x0994) }, 9, 1,
1879 UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1880 UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
1881 UVC_CTRL_FLAG_AUTO_UPDATE },
1882 };
1883
1884 unsigned int i;
1885
1886 for (i = 0; i < ARRAY_SIZE(fixups); ++i) {
1887 if (!usb_match_one_id(dev->intf, &fixups[i].id))
1888 continue;
1889
1890 if (fixups[i].entity == ctrl->entity->id &&
1891 fixups[i].selector == info->selector) {
1892 info->flags = fixups[i].flags;
1893 return;
1894 }
1895 }
1896}
1897
1898
1899
1900
1901static int uvc_ctrl_fill_xu_info(struct uvc_device *dev,
1902 const struct uvc_control *ctrl, struct uvc_control_info *info)
1903{
1904 u8 *data;
1905 int ret;
1906
1907 data = kmalloc(2, GFP_KERNEL);
1908 if (data == NULL)
1909 return -ENOMEM;
1910
1911 memcpy(info->entity, ctrl->entity->guid, sizeof(info->entity));
1912 info->index = ctrl->index;
1913 info->selector = ctrl->index + 1;
1914
1915
1916 ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum,
1917 info->selector, data, 2);
1918 if (ret < 0) {
1919 uvc_dbg(dev, CONTROL,
1920 "GET_LEN failed on control %pUl/%u (%d)\n",
1921 info->entity, info->selector, ret);
1922 goto done;
1923 }
1924
1925 info->size = le16_to_cpup((__le16 *)data);
1926
1927 info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX
1928 | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF;
1929
1930 ret = uvc_ctrl_get_flags(dev, ctrl, info);
1931 if (ret < 0) {
1932 uvc_dbg(dev, CONTROL,
1933 "Failed to get flags for control %pUl/%u (%d)\n",
1934 info->entity, info->selector, ret);
1935 goto done;
1936 }
1937
1938 uvc_ctrl_fixup_xu_info(dev, ctrl, info);
1939
1940 uvc_dbg(dev, CONTROL,
1941 "XU control %pUl/%u queried: len %u, flags { get %u set %u auto %u }\n",
1942 info->entity, info->selector, info->size,
1943 (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0,
1944 (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0,
1945 (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0);
1946
1947done:
1948 kfree(data);
1949 return ret;
1950}
1951
1952static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
1953 const struct uvc_control_info *info);
1954
1955static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev,
1956 struct uvc_control *ctrl)
1957{
1958 struct uvc_control_info info;
1959 int ret;
1960
1961 if (ctrl->initialized)
1962 return 0;
1963
1964 ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info);
1965 if (ret < 0)
1966 return ret;
1967
1968 ret = uvc_ctrl_add_info(dev, ctrl, &info);
1969 if (ret < 0)
1970 uvc_dbg(dev, CONTROL,
1971 "Failed to initialize control %pUl/%u on device %s entity %u\n",
1972 info.entity, info.selector, dev->udev->devpath,
1973 ctrl->entity->id);
1974
1975 return ret;
1976}
1977
1978int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
1979 struct uvc_xu_control_query *xqry)
1980{
1981 struct uvc_entity *entity;
1982 struct uvc_control *ctrl;
1983 unsigned int i;
1984 bool found;
1985 u32 reqflags;
1986 u16 size;
1987 u8 *data = NULL;
1988 int ret;
1989
1990
1991 found = false;
1992 list_for_each_entry(entity, &chain->entities, chain) {
1993 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT &&
1994 entity->id == xqry->unit) {
1995 found = true;
1996 break;
1997 }
1998 }
1999
2000 if (!found) {
2001 uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n",
2002 xqry->unit);
2003 return -ENOENT;
2004 }
2005
2006
2007 found = false;
2008 for (i = 0; i < entity->ncontrols; ++i) {
2009 ctrl = &entity->controls[i];
2010 if (ctrl->index == xqry->selector - 1) {
2011 found = true;
2012 break;
2013 }
2014 }
2015
2016 if (!found) {
2017 uvc_dbg(chain->dev, CONTROL, "Control %pUl/%u not found\n",
2018 entity->guid, xqry->selector);
2019 return -ENOENT;
2020 }
2021
2022 if (mutex_lock_interruptible(&chain->ctrl_mutex))
2023 return -ERESTARTSYS;
2024
2025 ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl);
2026 if (ret < 0) {
2027 ret = -ENOENT;
2028 goto done;
2029 }
2030
2031
2032 reqflags = 0;
2033 size = ctrl->info.size;
2034
2035 switch (xqry->query) {
2036 case UVC_GET_CUR:
2037 reqflags = UVC_CTRL_FLAG_GET_CUR;
2038 break;
2039 case UVC_GET_MIN:
2040 reqflags = UVC_CTRL_FLAG_GET_MIN;
2041 break;
2042 case UVC_GET_MAX:
2043 reqflags = UVC_CTRL_FLAG_GET_MAX;
2044 break;
2045 case UVC_GET_DEF:
2046 reqflags = UVC_CTRL_FLAG_GET_DEF;
2047 break;
2048 case UVC_GET_RES:
2049 reqflags = UVC_CTRL_FLAG_GET_RES;
2050 break;
2051 case UVC_SET_CUR:
2052 reqflags = UVC_CTRL_FLAG_SET_CUR;
2053 break;
2054 case UVC_GET_LEN:
2055 size = 2;
2056 break;
2057 case UVC_GET_INFO:
2058 size = 1;
2059 break;
2060 default:
2061 ret = -EINVAL;
2062 goto done;
2063 }
2064
2065 if (size != xqry->size) {
2066 ret = -ENOBUFS;
2067 goto done;
2068 }
2069
2070 if (reqflags && !(ctrl->info.flags & reqflags)) {
2071 ret = -EBADRQC;
2072 goto done;
2073 }
2074
2075 data = kmalloc(size, GFP_KERNEL);
2076 if (data == NULL) {
2077 ret = -ENOMEM;
2078 goto done;
2079 }
2080
2081 if (xqry->query == UVC_SET_CUR &&
2082 copy_from_user(data, xqry->data, size)) {
2083 ret = -EFAULT;
2084 goto done;
2085 }
2086
2087 ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit,
2088 chain->dev->intfnum, xqry->selector, data, size);
2089 if (ret < 0)
2090 goto done;
2091
2092 if (xqry->query != UVC_SET_CUR &&
2093 copy_to_user(xqry->data, data, size))
2094 ret = -EFAULT;
2095done:
2096 kfree(data);
2097 mutex_unlock(&chain->ctrl_mutex);
2098 return ret;
2099}
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114int uvc_ctrl_restore_values(struct uvc_device *dev)
2115{
2116 struct uvc_control *ctrl;
2117 struct uvc_entity *entity;
2118 unsigned int i;
2119 int ret;
2120
2121
2122 list_for_each_entry(entity, &dev->entities, list) {
2123
2124 for (i = 0; i < entity->ncontrols; ++i) {
2125 ctrl = &entity->controls[i];
2126
2127 if (!ctrl->initialized || !ctrl->modified ||
2128 (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0)
2129 continue;
2130 dev_dbg(&dev->udev->dev,
2131 "restoring control %pUl/%u/%u\n",
2132 ctrl->info.entity, ctrl->info.index,
2133 ctrl->info.selector);
2134 ctrl->dirty = 1;
2135 }
2136
2137 ret = uvc_ctrl_commit_entity(dev, entity, 0, NULL);
2138 if (ret < 0)
2139 return ret;
2140 }
2141
2142 return 0;
2143}
2144
2145
2146
2147
2148
2149
2150
2151
2152static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
2153 const struct uvc_control_info *info)
2154{
2155 ctrl->info = *info;
2156 INIT_LIST_HEAD(&ctrl->info.mappings);
2157
2158
2159 ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1,
2160 GFP_KERNEL);
2161 if (!ctrl->uvc_data)
2162 return -ENOMEM;
2163
2164 ctrl->initialized = 1;
2165
2166 uvc_dbg(dev, CONTROL, "Added control %pUl/%u to device %s entity %u\n",
2167 ctrl->info.entity, ctrl->info.selector, dev->udev->devpath,
2168 ctrl->entity->id);
2169
2170 return 0;
2171}
2172
2173
2174
2175
2176static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
2177 struct uvc_control *ctrl, const struct uvc_control_mapping *mapping)
2178{
2179 struct uvc_control_mapping *map;
2180 unsigned int size;
2181 unsigned int i;
2182
2183
2184
2185
2186
2187 map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL);
2188 if (map == NULL)
2189 return -ENOMEM;
2190
2191 INIT_LIST_HEAD(&map->ev_subs);
2192
2193 size = sizeof(*mapping->menu_info) * mapping->menu_count;
2194 map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL);
2195 if (map->menu_info == NULL) {
2196 kfree(map);
2197 return -ENOMEM;
2198 }
2199
2200 if (map->get == NULL)
2201 map->get = uvc_get_le_value;
2202 if (map->set == NULL)
2203 map->set = uvc_set_le_value;
2204
2205 for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) {
2206 if (V4L2_CTRL_ID2WHICH(uvc_control_classes[i]) ==
2207 V4L2_CTRL_ID2WHICH(map->id)) {
2208 chain->ctrl_class_bitmap |= BIT(i);
2209 break;
2210 }
2211 }
2212
2213 list_add_tail(&map->list, &ctrl->info.mappings);
2214 uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n",
2215 uvc_map_get_name(map), ctrl->info.entity,
2216 ctrl->info.selector);
2217
2218 return 0;
2219}
2220
2221int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
2222 const struct uvc_control_mapping *mapping)
2223{
2224 struct uvc_device *dev = chain->dev;
2225 struct uvc_control_mapping *map;
2226 struct uvc_entity *entity;
2227 struct uvc_control *ctrl;
2228 int found = 0;
2229 int ret;
2230
2231 if (mapping->id & ~V4L2_CTRL_ID_MASK) {
2232 uvc_dbg(dev, CONTROL,
2233 "Can't add mapping '%s', control id 0x%08x is invalid\n",
2234 uvc_map_get_name(mapping), mapping->id);
2235 return -EINVAL;
2236 }
2237
2238
2239 list_for_each_entry(entity, &chain->entities, chain) {
2240 unsigned int i;
2241
2242 if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT ||
2243 !uvc_entity_match_guid(entity, mapping->entity))
2244 continue;
2245
2246 for (i = 0; i < entity->ncontrols; ++i) {
2247 ctrl = &entity->controls[i];
2248 if (ctrl->index == mapping->selector - 1) {
2249 found = 1;
2250 break;
2251 }
2252 }
2253
2254 if (found)
2255 break;
2256 }
2257 if (!found)
2258 return -ENOENT;
2259
2260 if (mutex_lock_interruptible(&chain->ctrl_mutex))
2261 return -ERESTARTSYS;
2262
2263
2264 ret = uvc_ctrl_init_xu_ctrl(dev, ctrl);
2265 if (ret < 0) {
2266 ret = -ENOENT;
2267 goto done;
2268 }
2269
2270
2271 if (mapping->size > 32 ||
2272 mapping->offset + mapping->size > ctrl->info.size * 8) {
2273 ret = -EINVAL;
2274 goto done;
2275 }
2276
2277 list_for_each_entry(map, &ctrl->info.mappings, list) {
2278 if (mapping->id == map->id) {
2279 uvc_dbg(dev, CONTROL,
2280 "Can't add mapping '%s', control id 0x%08x already exists\n",
2281 uvc_map_get_name(mapping), mapping->id);
2282 ret = -EEXIST;
2283 goto done;
2284 }
2285 }
2286
2287
2288 if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) {
2289 atomic_dec(&dev->nmappings);
2290 uvc_dbg(dev, CONTROL,
2291 "Can't add mapping '%s', maximum mappings count (%u) exceeded\n",
2292 uvc_map_get_name(mapping), UVC_MAX_CONTROL_MAPPINGS);
2293 ret = -ENOMEM;
2294 goto done;
2295 }
2296
2297 ret = __uvc_ctrl_add_mapping(chain, ctrl, mapping);
2298 if (ret < 0)
2299 atomic_dec(&dev->nmappings);
2300
2301done:
2302 mutex_unlock(&chain->ctrl_mutex);
2303 return ret;
2304}
2305
2306
2307
2308
2309
2310
2311static void uvc_ctrl_prune_entity(struct uvc_device *dev,
2312 struct uvc_entity *entity)
2313{
2314 struct uvc_ctrl_blacklist {
2315 struct usb_device_id id;
2316 u8 index;
2317 };
2318
2319 static const struct uvc_ctrl_blacklist processing_blacklist[] = {
2320 { { USB_DEVICE(0x13d3, 0x509b) }, 9 },
2321 { { USB_DEVICE(0x1c4f, 0x3000) }, 6 },
2322 { { USB_DEVICE(0x5986, 0x0241) }, 2 },
2323 };
2324 static const struct uvc_ctrl_blacklist camera_blacklist[] = {
2325 { { USB_DEVICE(0x06f8, 0x3005) }, 9 },
2326 };
2327
2328 const struct uvc_ctrl_blacklist *blacklist;
2329 unsigned int size;
2330 unsigned int count;
2331 unsigned int i;
2332 u8 *controls;
2333
2334 switch (UVC_ENTITY_TYPE(entity)) {
2335 case UVC_VC_PROCESSING_UNIT:
2336 blacklist = processing_blacklist;
2337 count = ARRAY_SIZE(processing_blacklist);
2338 controls = entity->processing.bmControls;
2339 size = entity->processing.bControlSize;
2340 break;
2341
2342 case UVC_ITT_CAMERA:
2343 blacklist = camera_blacklist;
2344 count = ARRAY_SIZE(camera_blacklist);
2345 controls = entity->camera.bmControls;
2346 size = entity->camera.bControlSize;
2347 break;
2348
2349 default:
2350 return;
2351 }
2352
2353 for (i = 0; i < count; ++i) {
2354 if (!usb_match_one_id(dev->intf, &blacklist[i].id))
2355 continue;
2356
2357 if (blacklist[i].index >= 8 * size ||
2358 !uvc_test_bit(controls, blacklist[i].index))
2359 continue;
2360
2361 uvc_dbg(dev, CONTROL,
2362 "%u/%u control is black listed, removing it\n",
2363 entity->id, blacklist[i].index);
2364
2365 uvc_clear_bit(controls, blacklist[i].index);
2366 }
2367}
2368
2369
2370
2371
2372
2373static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
2374 struct uvc_control *ctrl)
2375{
2376 const struct uvc_control_info *info = uvc_ctrls;
2377 const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls);
2378 const struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
2379 const struct uvc_control_mapping *mend =
2380 mapping + ARRAY_SIZE(uvc_ctrl_mappings);
2381
2382
2383
2384
2385
2386
2387 if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT)
2388 return;
2389
2390 for (; info < iend; ++info) {
2391 if (uvc_entity_match_guid(ctrl->entity, info->entity) &&
2392 ctrl->index == info->index) {
2393 uvc_ctrl_add_info(chain->dev, ctrl, info);
2394
2395
2396
2397
2398
2399
2400 uvc_ctrl_get_flags(chain->dev, ctrl, &ctrl->info);
2401 break;
2402 }
2403 }
2404
2405 if (!ctrl->initialized)
2406 return;
2407
2408 for (; mapping < mend; ++mapping) {
2409 if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
2410 ctrl->info.selector == mapping->selector)
2411 __uvc_ctrl_add_mapping(chain, ctrl, mapping);
2412 }
2413}
2414
2415
2416
2417
2418static int uvc_ctrl_init_chain(struct uvc_video_chain *chain)
2419{
2420 struct uvc_entity *entity;
2421 unsigned int i;
2422
2423
2424 list_for_each_entry(entity, &chain->entities, chain) {
2425 struct uvc_control *ctrl;
2426 unsigned int bControlSize = 0, ncontrols;
2427 u8 *bmControls = NULL;
2428
2429 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
2430 bmControls = entity->extension.bmControls;
2431 bControlSize = entity->extension.bControlSize;
2432 } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) {
2433 bmControls = entity->processing.bmControls;
2434 bControlSize = entity->processing.bControlSize;
2435 } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) {
2436 bmControls = entity->camera.bmControls;
2437 bControlSize = entity->camera.bControlSize;
2438 } else if (UVC_ENTITY_TYPE(entity) == UVC_EXT_GPIO_UNIT) {
2439 bmControls = entity->gpio.bmControls;
2440 bControlSize = entity->gpio.bControlSize;
2441 }
2442
2443
2444 uvc_ctrl_prune_entity(chain->dev, entity);
2445
2446
2447 ncontrols = memweight(bmControls, bControlSize);
2448 if (ncontrols == 0)
2449 continue;
2450
2451 entity->controls = kcalloc(ncontrols, sizeof(*ctrl),
2452 GFP_KERNEL);
2453 if (entity->controls == NULL)
2454 return -ENOMEM;
2455 entity->ncontrols = ncontrols;
2456
2457
2458 ctrl = entity->controls;
2459 for (i = 0; i < bControlSize * 8; ++i) {
2460 if (uvc_test_bit(bmControls, i) == 0)
2461 continue;
2462
2463 ctrl->entity = entity;
2464 ctrl->index = i;
2465
2466 uvc_ctrl_init_ctrl(chain, ctrl);
2467 ctrl++;
2468 }
2469 }
2470
2471 return 0;
2472}
2473
2474int uvc_ctrl_init_device(struct uvc_device *dev)
2475{
2476 struct uvc_video_chain *chain;
2477 int ret;
2478
2479 INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work);
2480
2481 list_for_each_entry(chain, &dev->chains, list) {
2482 ret = uvc_ctrl_init_chain(chain);
2483 if (ret)
2484 return ret;
2485 }
2486
2487 return 0;
2488}
2489
2490
2491
2492
2493static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
2494 struct uvc_control *ctrl)
2495{
2496 struct uvc_control_mapping *mapping, *nm;
2497
2498 list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
2499 list_del(&mapping->list);
2500 kfree(mapping->menu_info);
2501 kfree(mapping->name);
2502 kfree(mapping);
2503 }
2504}
2505
2506void uvc_ctrl_cleanup_device(struct uvc_device *dev)
2507{
2508 struct uvc_entity *entity;
2509 unsigned int i;
2510
2511
2512 if (dev->async_ctrl.work.func)
2513 cancel_work_sync(&dev->async_ctrl.work);
2514
2515
2516 list_for_each_entry(entity, &dev->entities, list) {
2517 for (i = 0; i < entity->ncontrols; ++i) {
2518 struct uvc_control *ctrl = &entity->controls[i];
2519
2520 if (!ctrl->initialized)
2521 continue;
2522
2523 uvc_ctrl_cleanup_mappings(dev, ctrl);
2524 kfree(ctrl->uvc_data);
2525 }
2526
2527 kfree(entity->controls);
2528 }
2529}
2530
