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FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / media / video / uvc / uvc_ctrl.c
blob59f8a9ad3796c3ef5960b4e77f12a7269ea7b7b9
1 /*
2 * uvc_ctrl.c -- USB Video Class driver - Controls
3 *
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/list.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/uaccess.h>
19 #include <linux/usb.h>
20 #include <linux/videodev2.h>
21 #include <linux/vmalloc.h>
22 #include <linux/wait.h>
23 #include <asm/atomic.h>
24
25 #include "uvcvideo.h"
26
27 #define UVC_CTRL_DATA_CURRENT 0
28 #define UVC_CTRL_DATA_BACKUP 1
29 #define UVC_CTRL_DATA_MIN 2
30 #define UVC_CTRL_DATA_MAX 3
31 #define UVC_CTRL_DATA_RES 4
32 #define UVC_CTRL_DATA_DEF 5
33 #define UVC_CTRL_DATA_LAST 6
34
35 /* ------------------------------------------------------------------------
36 * Controls
37 */
38
39 static struct uvc_control_info uvc_ctrls[] = {
40 {
41 .entity = UVC_GUID_UVC_PROCESSING,
42 .selector = UVC_PU_BRIGHTNESS_CONTROL,
43 .index = 0,
44 .size = 2,
45 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
46 | UVC_CONTROL_RESTORE,
47 },
48 {
49 .entity = UVC_GUID_UVC_PROCESSING,
50 .selector = UVC_PU_CONTRAST_CONTROL,
51 .index = 1,
52 .size = 2,
53 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
54 | UVC_CONTROL_RESTORE,
55 },
56 {
57 .entity = UVC_GUID_UVC_PROCESSING,
58 .selector = UVC_PU_HUE_CONTROL,
59 .index = 2,
60 .size = 2,
61 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
62 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
63 },
64 {
65 .entity = UVC_GUID_UVC_PROCESSING,
66 .selector = UVC_PU_SATURATION_CONTROL,
67 .index = 3,
68 .size = 2,
69 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
70 | UVC_CONTROL_RESTORE,
71 },
72 {
73 .entity = UVC_GUID_UVC_PROCESSING,
74 .selector = UVC_PU_SHARPNESS_CONTROL,
75 .index = 4,
76 .size = 2,
77 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
78 | UVC_CONTROL_RESTORE,
79 },
80 {
81 .entity = UVC_GUID_UVC_PROCESSING,
82 .selector = UVC_PU_GAMMA_CONTROL,
83 .index = 5,
84 .size = 2,
85 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
86 | UVC_CONTROL_RESTORE,
87 },
88 {
89 .entity = UVC_GUID_UVC_PROCESSING,
90 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
91 .index = 6,
92 .size = 2,
93 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
94 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
95 },
96 {
97 .entity = UVC_GUID_UVC_PROCESSING,
98 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
99 .index = 7,
100 .size = 4,
101 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
102 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
103 },
104 {
105 .entity = UVC_GUID_UVC_PROCESSING,
106 .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
107 .index = 8,
108 .size = 2,
109 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
110 | UVC_CONTROL_RESTORE,
111 },
112 {
113 .entity = UVC_GUID_UVC_PROCESSING,
114 .selector = UVC_PU_GAIN_CONTROL,
115 .index = 9,
116 .size = 2,
117 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
118 | UVC_CONTROL_RESTORE,
119 },
120 {
121 .entity = UVC_GUID_UVC_PROCESSING,
122 .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
123 .index = 10,
124 .size = 1,
125 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
126 | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
127 },
128 {
129 .entity = UVC_GUID_UVC_PROCESSING,
130 .selector = UVC_PU_HUE_AUTO_CONTROL,
131 .index = 11,
132 .size = 1,
133 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
134 | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
135 },
136 {
137 .entity = UVC_GUID_UVC_PROCESSING,
138 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
139 .index = 12,
140 .size = 1,
141 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
142 | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
143 },
144 {
145 .entity = UVC_GUID_UVC_PROCESSING,
146 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
147 .index = 13,
148 .size = 1,
149 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
150 | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
151 },
152 {
153 .entity = UVC_GUID_UVC_PROCESSING,
154 .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL,
155 .index = 14,
156 .size = 2,
157 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
158 | UVC_CONTROL_RESTORE,
159 },
160 {
161 .entity = UVC_GUID_UVC_PROCESSING,
162 .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL,
163 .index = 15,
164 .size = 2,
165 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
166 | UVC_CONTROL_RESTORE,
167 },
168 {
169 .entity = UVC_GUID_UVC_PROCESSING,
170 .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL,
171 .index = 16,
172 .size = 1,
173 .flags = UVC_CONTROL_GET_CUR,
174 },
175 {
176 .entity = UVC_GUID_UVC_PROCESSING,
177 .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL,
178 .index = 17,
179 .size = 1,
180 .flags = UVC_CONTROL_GET_CUR,
181 },
182 {
183 .entity = UVC_GUID_UVC_CAMERA,
184 .selector = UVC_CT_SCANNING_MODE_CONTROL,
185 .index = 0,
186 .size = 1,
187 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
188 | UVC_CONTROL_RESTORE,
189 },
190 {
191 .entity = UVC_GUID_UVC_CAMERA,
192 .selector = UVC_CT_AE_MODE_CONTROL,
193 .index = 1,
194 .size = 1,
195 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
196 | UVC_CONTROL_GET_DEF | UVC_CONTROL_GET_RES
197 | UVC_CONTROL_RESTORE,
198 },
199 {
200 .entity = UVC_GUID_UVC_CAMERA,
201 .selector = UVC_CT_AE_PRIORITY_CONTROL,
202 .index = 2,
203 .size = 1,
204 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
205 | UVC_CONTROL_RESTORE,
206 },
207 {
208 .entity = UVC_GUID_UVC_CAMERA,
209 .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
210 .index = 3,
211 .size = 4,
212 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
213 | UVC_CONTROL_RESTORE,
214 },
215 {
216 .entity = UVC_GUID_UVC_CAMERA,
217 .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL,
218 .index = 4,
219 .size = 1,
220 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_RESTORE,
221 },
222 {
223 .entity = UVC_GUID_UVC_CAMERA,
224 .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
225 .index = 5,
226 .size = 2,
227 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
228 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
229 },
230 {
231 .entity = UVC_GUID_UVC_CAMERA,
232 .selector = UVC_CT_FOCUS_RELATIVE_CONTROL,
233 .index = 6,
234 .size = 2,
235 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN
236 | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES
237 | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE,
238 },
239 {
240 .entity = UVC_GUID_UVC_CAMERA,
241 .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
242 .index = 7,
243 .size = 2,
244 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
245 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
246 },
247 {
248 .entity = UVC_GUID_UVC_CAMERA,
249 .selector = UVC_CT_IRIS_RELATIVE_CONTROL,
250 .index = 8,
251 .size = 1,
252 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_AUTO_UPDATE,
253 },
254 {
255 .entity = UVC_GUID_UVC_CAMERA,
256 .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
257 .index = 9,
258 .size = 2,
259 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
260 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
261 },
262 {
263 .entity = UVC_GUID_UVC_CAMERA,
264 .selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
265 .index = 10,
266 .size = 3,
267 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN
268 | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES
269 | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE,
270 },
271 {
272 .entity = UVC_GUID_UVC_CAMERA,
273 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
274 .index = 11,
275 .size = 8,
276 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
277 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
278 },
279 {
280 .entity = UVC_GUID_UVC_CAMERA,
281 .selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
282 .index = 12,
283 .size = 4,
284 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN
285 | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES
286 | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE,
287 },
288 {
289 .entity = UVC_GUID_UVC_CAMERA,
290 .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL,
291 .index = 13,
292 .size = 2,
293 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
294 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
295 },
296 {
297 .entity = UVC_GUID_UVC_CAMERA,
298 .selector = UVC_CT_ROLL_RELATIVE_CONTROL,
299 .index = 14,
300 .size = 2,
301 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN
302 | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES
303 | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE,
304 },
305 {
306 .entity = UVC_GUID_UVC_CAMERA,
307 .selector = UVC_CT_FOCUS_AUTO_CONTROL,
308 .index = 17,
309 .size = 1,
310 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
311 | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
312 },
313 {
314 .entity = UVC_GUID_UVC_CAMERA,
315 .selector = UVC_CT_PRIVACY_CONTROL,
316 .index = 18,
317 .size = 1,
318 .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
319 | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE,
320 },
321 };
322
323 static struct uvc_menu_info power_line_frequency_controls[] = {
324 { 0, "Disabled" },
325 { 1, "50 Hz" },
326 { 2, "60 Hz" },
327 };
328
329 static struct uvc_menu_info exposure_auto_controls[] = {
330 { 2, "Auto Mode" },
331 { 1, "Manual Mode" },
332 { 4, "Shutter Priority Mode" },
333 { 8, "Aperture Priority Mode" },
334 };
335
336 static __s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping,
337 __u8 query, const __u8 *data)
338 {
339 __s8 zoom = (__s8)data[0];
340
341 switch (query) {
342 case UVC_GET_CUR:
343 return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]);
344
345 case UVC_GET_MIN:
346 case UVC_GET_MAX:
347 case UVC_GET_RES:
348 case UVC_GET_DEF:
349 default:
350 return data[2];
351 }
352 }
353
354 static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping,
355 __s32 value, __u8 *data)
356 {
357 data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
358 data[2] = min((int)abs(value), 0xff);
359 }
360
361 static struct uvc_control_mapping uvc_ctrl_mappings[] = {
362 {
363 .id = V4L2_CID_BRIGHTNESS,
364 .name = "Brightness",
365 .entity = UVC_GUID_UVC_PROCESSING,
366 .selector = UVC_PU_BRIGHTNESS_CONTROL,
367 .size = 16,
368 .offset = 0,
369 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
370 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
371 },
372 {
373 .id = V4L2_CID_CONTRAST,
374 .name = "Contrast",
375 .entity = UVC_GUID_UVC_PROCESSING,
376 .selector = UVC_PU_CONTRAST_CONTROL,
377 .size = 16,
378 .offset = 0,
379 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
380 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
381 },
382 {
383 .id = V4L2_CID_HUE,
384 .name = "Hue",
385 .entity = UVC_GUID_UVC_PROCESSING,
386 .selector = UVC_PU_HUE_CONTROL,
387 .size = 16,
388 .offset = 0,
389 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
390 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
391 },
392 {
393 .id = V4L2_CID_SATURATION,
394 .name = "Saturation",
395 .entity = UVC_GUID_UVC_PROCESSING,
396 .selector = UVC_PU_SATURATION_CONTROL,
397 .size = 16,
398 .offset = 0,
399 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
400 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
401 },
402 {
403 .id = V4L2_CID_SHARPNESS,
404 .name = "Sharpness",
405 .entity = UVC_GUID_UVC_PROCESSING,
406 .selector = UVC_PU_SHARPNESS_CONTROL,
407 .size = 16,
408 .offset = 0,
409 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
410 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
411 },
412 {
413 .id = V4L2_CID_GAMMA,
414 .name = "Gamma",
415 .entity = UVC_GUID_UVC_PROCESSING,
416 .selector = UVC_PU_GAMMA_CONTROL,
417 .size = 16,
418 .offset = 0,
419 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
420 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
421 },
422 {
423 .id = V4L2_CID_BACKLIGHT_COMPENSATION,
424 .name = "Backlight Compensation",
425 .entity = UVC_GUID_UVC_PROCESSING,
426 .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
427 .size = 16,
428 .offset = 0,
429 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
430 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
431 },
432 {
433 .id = V4L2_CID_GAIN,
434 .name = "Gain",
435 .entity = UVC_GUID_UVC_PROCESSING,
436 .selector = UVC_PU_GAIN_CONTROL,
437 .size = 16,
438 .offset = 0,
439 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
440 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
441 },
442 {
443 .id = V4L2_CID_POWER_LINE_FREQUENCY,
444 .name = "Power Line Frequency",
445 .entity = UVC_GUID_UVC_PROCESSING,
446 .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
447 .size = 2,
448 .offset = 0,
449 .v4l2_type = V4L2_CTRL_TYPE_MENU,
450 .data_type = UVC_CTRL_DATA_TYPE_ENUM,
451 .menu_info = power_line_frequency_controls,
452 .menu_count = ARRAY_SIZE(power_line_frequency_controls),
453 },
454 {
455 .id = V4L2_CID_HUE_AUTO,
456 .name = "Hue, Auto",
457 .entity = UVC_GUID_UVC_PROCESSING,
458 .selector = UVC_PU_HUE_AUTO_CONTROL,
459 .size = 1,
460 .offset = 0,
461 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
462 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
463 },
464 {
465 .id = V4L2_CID_EXPOSURE_AUTO,
466 .name = "Exposure, Auto",
467 .entity = UVC_GUID_UVC_CAMERA,
468 .selector = UVC_CT_AE_MODE_CONTROL,
469 .size = 4,
470 .offset = 0,
471 .v4l2_type = V4L2_CTRL_TYPE_MENU,
472 .data_type = UVC_CTRL_DATA_TYPE_BITMASK,
473 .menu_info = exposure_auto_controls,
474 .menu_count = ARRAY_SIZE(exposure_auto_controls),
475 },
476 {
477 .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY,
478 .name = "Exposure, Auto Priority",
479 .entity = UVC_GUID_UVC_CAMERA,
480 .selector = UVC_CT_AE_PRIORITY_CONTROL,
481 .size = 1,
482 .offset = 0,
483 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
484 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
485 },
486 {
487 .id = V4L2_CID_EXPOSURE_ABSOLUTE,
488 .name = "Exposure (Absolute)",
489 .entity = UVC_GUID_UVC_CAMERA,
490 .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
491 .size = 32,
492 .offset = 0,
493 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
494 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
495 },
496 {
497 .id = V4L2_CID_AUTO_WHITE_BALANCE,
498 .name = "White Balance Temperature, Auto",
499 .entity = UVC_GUID_UVC_PROCESSING,
500 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
501 .size = 1,
502 .offset = 0,
503 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
504 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
505 },
506 {
507 .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
508 .name = "White Balance Temperature",
509 .entity = UVC_GUID_UVC_PROCESSING,
510 .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
511 .size = 16,
512 .offset = 0,
513 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
514 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
515 },
516 {
517 .id = V4L2_CID_AUTO_WHITE_BALANCE,
518 .name = "White Balance Component, Auto",
519 .entity = UVC_GUID_UVC_PROCESSING,
520 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
521 .size = 1,
522 .offset = 0,
523 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
524 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
525 },
526 {
527 .id = V4L2_CID_BLUE_BALANCE,
528 .name = "White Balance Blue Component",
529 .entity = UVC_GUID_UVC_PROCESSING,
530 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
531 .size = 16,
532 .offset = 0,
533 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
534 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
535 },
536 {
537 .id = V4L2_CID_RED_BALANCE,
538 .name = "White Balance Red Component",
539 .entity = UVC_GUID_UVC_PROCESSING,
540 .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
541 .size = 16,
542 .offset = 16,
543 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
544 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
545 },
546 {
547 .id = V4L2_CID_FOCUS_ABSOLUTE,
548 .name = "Focus (absolute)",
549 .entity = UVC_GUID_UVC_CAMERA,
550 .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
551 .size = 16,
552 .offset = 0,
553 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
554 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
555 },
556 {
557 .id = V4L2_CID_FOCUS_AUTO,
558 .name = "Focus, Auto",
559 .entity = UVC_GUID_UVC_CAMERA,
560 .selector = UVC_CT_FOCUS_AUTO_CONTROL,
561 .size = 1,
562 .offset = 0,
563 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
564 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
565 },
566 {
567 .id = V4L2_CID_IRIS_ABSOLUTE,
568 .name = "Iris, Absolute",
569 .entity = UVC_GUID_UVC_CAMERA,
570 .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
571 .size = 16,
572 .offset = 0,
573 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
574 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
575 },
576 {
577 .id = V4L2_CID_IRIS_RELATIVE,
578 .name = "Iris, Relative",
579 .entity = UVC_GUID_UVC_CAMERA,
580 .selector = UVC_CT_IRIS_RELATIVE_CONTROL,
581 .size = 8,
582 .offset = 0,
583 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
584 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
585 },
586 {
587 .id = V4L2_CID_ZOOM_ABSOLUTE,
588 .name = "Zoom, Absolute",
589 .entity = UVC_GUID_UVC_CAMERA,
590 .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
591 .size = 16,
592 .offset = 0,
593 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
594 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
595 },
596 {
597 .id = V4L2_CID_ZOOM_CONTINUOUS,
598 .name = "Zoom, Continuous",
599 .entity = UVC_GUID_UVC_CAMERA,
600 .selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
601 .size = 0,
602 .offset = 0,
603 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
604 .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
605 .get = uvc_ctrl_get_zoom,
606 .set = uvc_ctrl_set_zoom,
607 },
608 {
609 .id = V4L2_CID_PAN_ABSOLUTE,
610 .name = "Pan (Absolute)",
611 .entity = UVC_GUID_UVC_CAMERA,
612 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
613 .size = 32,
614 .offset = 0,
615 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
616 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
617 },
618 {
619 .id = V4L2_CID_TILT_ABSOLUTE,
620 .name = "Tilt (Absolute)",
621 .entity = UVC_GUID_UVC_CAMERA,
622 .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
623 .size = 32,
624 .offset = 32,
625 .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
626 .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
627 },
628 {
629 .id = V4L2_CID_PRIVACY,
630 .name = "Privacy",
631 .entity = UVC_GUID_UVC_CAMERA,
632 .selector = UVC_CT_PRIVACY_CONTROL,
633 .size = 1,
634 .offset = 0,
635 .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
636 .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
637 },
638 };
639
640 /* ------------------------------------------------------------------------
641 * Utility functions
642 */
643
644 static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id)
645 {
646 return ctrl->uvc_data + id * ctrl->info.size;
647 }
648
649 static inline int uvc_test_bit(const __u8 *data, int bit)
650 {
651 return (data[bit >> 3] >> (bit & 7)) & 1;
652 }
653
654 static inline void uvc_clear_bit(__u8 *data, int bit)
655 {
656 data[bit >> 3] &= ~(1 << (bit & 7));
657 }
658
659 /* Extract the bit string specified by mapping->offset and mapping->size
660 * from the little-endian data stored at 'data' and return the result as
661 * a signed 32bit integer. Sign extension will be performed if the mapping
662 * references a signed data type.
663 */
664 static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping,
665 __u8 query, const __u8 *data)
666 {
667 int bits = mapping->size;
668 int offset = mapping->offset;
669 __s32 value = 0;
670 __u8 mask;
671
672 data += offset / 8;
673 offset &= 7;
674 mask = ((1LL << bits) - 1) << offset;
675
676 for (; bits > 0; data++) {
677 __u8 byte = *data & mask;
678 value |= offset > 0 ? (byte >> offset) : (byte << (-offset));
679 bits -= 8 - (offset > 0 ? offset : 0);
680 offset -= 8;
681 mask = (1 << bits) - 1;
682 }
683
684 /* Sign-extend the value if needed. */
685 if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
686 value |= -(value & (1 << (mapping->size - 1)));
687
688 return value;
689 }
690
691 /* Set the bit string specified by mapping->offset and mapping->size
692 * in the little-endian data stored at 'data' to the value 'value'.
693 */
694 static void uvc_set_le_value(struct uvc_control_mapping *mapping,
695 __s32 value, __u8 *data)
696 {
697 int bits = mapping->size;
698 int offset = mapping->offset;
699 __u8 mask;
700
701 /* According to the v4l2 spec, writing any value to a button control
702 * should result in the action belonging to the button control being
703 * triggered. UVC devices however want to see a 1 written -> override
704 * value.
705 */
706 if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON)
707 value = -1;
708
709 data += offset / 8;
710 offset &= 7;
711
712 for (; bits > 0; data++) {
713 mask = ((1LL << bits) - 1) << offset;
714 *data = (*data & ~mask) | ((value << offset) & mask);
715 value >>= offset ? offset : 8;
716 bits -= 8 - offset;
717 offset = 0;
718 }
719 }
720
721 /* ------------------------------------------------------------------------
722 * Terminal and unit management
723 */
724
725 static const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
726 static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA;
727 static const __u8 uvc_media_transport_input_guid[16] =
728 UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
729
730 static int uvc_entity_match_guid(const struct uvc_entity *entity,
731 const __u8 guid[16])
732 {
733 switch (UVC_ENTITY_TYPE(entity)) {
734 case UVC_ITT_CAMERA:
735 return memcmp(uvc_camera_guid, guid, 16) == 0;
736
737 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
738 return memcmp(uvc_media_transport_input_guid, guid, 16) == 0;
739
740 case UVC_VC_PROCESSING_UNIT:
741 return memcmp(uvc_processing_guid, guid, 16) == 0;
742
743 case UVC_VC_EXTENSION_UNIT:
744 return memcmp(entity->extension.guidExtensionCode,
745 guid, 16) == 0;
746
747 default:
748 return 0;
749 }
750 }
751
752 /* ------------------------------------------------------------------------
753 * UVC Controls
754 */
755
756 static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id,
757 struct uvc_control_mapping **mapping, struct uvc_control **control,
758 int next)
759 {
760 struct uvc_control *ctrl;
761 struct uvc_control_mapping *map;
762 unsigned int i;
763
764 if (entity == NULL)
765 return;
766
767 for (i = 0; i < entity->ncontrols; ++i) {
768 ctrl = &entity->controls[i];
769 if (!ctrl->initialized)
770 continue;
771
772 list_for_each_entry(map, &ctrl->info.mappings, list) {
773 if ((map->id == v4l2_id) && !next) {
774 *control = ctrl;
775 *mapping = map;
776 return;
777 }
778
779 if ((*mapping == NULL || (*mapping)->id > map->id) &&
780 (map->id > v4l2_id) && next) {
781 *control = ctrl;
782 *mapping = map;
783 }
784 }
785 }
786 }
787
788 static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
789 __u32 v4l2_id, struct uvc_control_mapping **mapping)
790 {
791 struct uvc_control *ctrl = NULL;
792 struct uvc_entity *entity;
793 int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL;
794
795 *mapping = NULL;
796
797 /* Mask the query flags. */
798 v4l2_id &= V4L2_CTRL_ID_MASK;
799
800 /* Find the control. */
801 list_for_each_entry(entity, &chain->entities, chain) {
802 __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next);
803 if (ctrl && !next)
804 return ctrl;
805 }
806
807 if (ctrl == NULL && !next)
808 uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n",
809 v4l2_id);
810
811 return ctrl;
812 }
813
814 static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain,
815 struct uvc_control *ctrl)
816 {
817 int ret;
818
819 if (ctrl->info.flags & UVC_CONTROL_GET_DEF) {
820 ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
821 chain->dev->intfnum, ctrl->info.selector,
822 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF),
823 ctrl->info.size);
824 if (ret < 0)
825 return ret;
826 }
827
828 if (ctrl->info.flags & UVC_CONTROL_GET_MIN) {
829 ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
830 chain->dev->intfnum, ctrl->info.selector,
831 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN),
832 ctrl->info.size);
833 if (ret < 0)
834 return ret;
835 }
836 if (ctrl->info.flags & UVC_CONTROL_GET_MAX) {
837 ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
838 chain->dev->intfnum, ctrl->info.selector,
839 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX),
840 ctrl->info.size);
841 if (ret < 0)
842 return ret;
843 }
844 if (ctrl->info.flags & UVC_CONTROL_GET_RES) {
845 ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
846 chain->dev->intfnum, ctrl->info.selector,
847 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES),
848 ctrl->info.size);
849 if (ret < 0)
850 return ret;
851 }
852
853 ctrl->cached = 1;
854 return 0;
855 }
856
857 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
858 struct v4l2_queryctrl *v4l2_ctrl)
859 {
860 struct uvc_control *ctrl;
861 struct uvc_control_mapping *mapping;
862 struct uvc_menu_info *menu;
863 unsigned int i;
864 int ret;
865
866 ret = mutex_lock_interruptible(&chain->ctrl_mutex);
867 if (ret < 0)
868 return -ERESTARTSYS;
869
870 ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
871 if (ctrl == NULL) {
872 ret = -EINVAL;
873 goto done;
874 }
875
876 memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
877 v4l2_ctrl->id = mapping->id;
878 v4l2_ctrl->type = mapping->v4l2_type;
879 strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
880 v4l2_ctrl->flags = 0;
881
882 if (!(ctrl->info.flags & UVC_CONTROL_GET_CUR))
883 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
884 if (!(ctrl->info.flags & UVC_CONTROL_SET_CUR))
885 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
886
887 if (!ctrl->cached) {
888 ret = uvc_ctrl_populate_cache(chain, ctrl);
889 if (ret < 0)
890 goto done;
891 }
892
893 if (ctrl->info.flags & UVC_CONTROL_GET_DEF) {
894 v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF,
895 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF));
896 }
897
898 switch (mapping->v4l2_type) {
899 case V4L2_CTRL_TYPE_MENU:
900 v4l2_ctrl->minimum = 0;
901 v4l2_ctrl->maximum = mapping->menu_count - 1;
902 v4l2_ctrl->step = 1;
903
904 menu = mapping->menu_info;
905 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
906 if (menu->value == v4l2_ctrl->default_value) {
907 v4l2_ctrl->default_value = i;
908 break;
909 }
910 }
911
912 goto done;
913
914 case V4L2_CTRL_TYPE_BOOLEAN:
915 v4l2_ctrl->minimum = 0;
916 v4l2_ctrl->maximum = 1;
917 v4l2_ctrl->step = 1;
918 goto done;
919
920 case V4L2_CTRL_TYPE_BUTTON:
921 v4l2_ctrl->minimum = 0;
922 v4l2_ctrl->maximum = 0;
923 v4l2_ctrl->step = 0;
924 goto done;
925
926 default:
927 break;
928 }
929
930 if (ctrl->info.flags & UVC_CONTROL_GET_MIN)
931 v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
932 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
933
934 if (ctrl->info.flags & UVC_CONTROL_GET_MAX)
935 v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
936 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
937
938 if (ctrl->info.flags & UVC_CONTROL_GET_RES)
939 v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES,
940 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
941
942 done:
943 mutex_unlock(&chain->ctrl_mutex);
944 return ret;
945 }
946
947 /*
948 * Mapping V4L2 controls to UVC controls can be straighforward if done well.
949 * Most of the UVC controls exist in V4L2, and can be mapped directly. Some
950 * must be grouped (for instance the Red Balance, Blue Balance and Do White
951 * Balance V4L2 controls use the White Balance Component UVC control) or
952 * otherwise translated. The approach we take here is to use a translation
953 * table for the controls that can be mapped directly, and handle the others
954 * manually.
955 */
956 int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
957 struct v4l2_querymenu *query_menu)
958 {
959 struct uvc_menu_info *menu_info;
960 struct uvc_control_mapping *mapping;
961 struct uvc_control *ctrl;
962 u32 index = query_menu->index;
963 u32 id = query_menu->id;
964 int ret;
965
966 memset(query_menu, 0, sizeof(*query_menu));
967 query_menu->id = id;
968 query_menu->index = index;
969
970 ret = mutex_lock_interruptible(&chain->ctrl_mutex);
971 if (ret < 0)
972 return -ERESTARTSYS;
973
974 ctrl = uvc_find_control(chain, query_menu->id, &mapping);
975 if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
976 ret = -EINVAL;
977 goto done;
978 }
979
980 if (query_menu->index >= mapping->menu_count) {
981 ret = -EINVAL;
982 goto done;
983 }
984
985 menu_info = &mapping->menu_info[query_menu->index];
986 strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name);
987
988 done:
989 mutex_unlock(&chain->ctrl_mutex);
990 return ret;
991 }
992
993
994 /* --------------------------------------------------------------------------
995 * Control transactions
996 *
997 * To make extended set operations as atomic as the hardware allows, controls
998 * are handled using begin/commit/rollback operations.
999 *
1000 * At the beginning of a set request, uvc_ctrl_begin should be called to
1001 * initialize the request. This function acquires the control lock.
1002 *
1003 * When setting a control, the new value is stored in the control data field
1004 * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for
1005 * later processing. If the UVC and V4L2 control sizes differ, the current
1006 * value is loaded from the hardware before storing the new value in the data
1007 * field.
1008 *
1009 * After processing all controls in the transaction, uvc_ctrl_commit or
1010 * uvc_ctrl_rollback must be called to apply the pending changes to the
1011 * hardware or revert them. When applying changes, all controls marked as
1012 * dirty will be modified in the UVC device, and the dirty flag will be
1013 * cleared. When reverting controls, the control data field
1014 * UVC_CTRL_DATA_CURRENT is reverted to its previous value
1015 * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the
1016 * control lock.
1017 */
1018 int uvc_ctrl_begin(struct uvc_video_chain *chain)
1019 {
1020 return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0;
1021 }
1022
1023 static int uvc_ctrl_commit_entity(struct uvc_device *dev,
1024 struct uvc_entity *entity, int rollback)
1025 {
1026 struct uvc_control *ctrl;
1027 unsigned int i;
1028 int ret;
1029
1030 if (entity == NULL)
1031 return 0;
1032
1033 for (i = 0; i < entity->ncontrols; ++i) {
1034 ctrl = &entity->controls[i];
1035 if (!ctrl->initialized)
1036 continue;
1037
1038 /* Reset the loaded flag for auto-update controls that were
1039 * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent
1040 * uvc_ctrl_get from using the cached value.
1041 */
1042 if (ctrl->info.flags & UVC_CONTROL_AUTO_UPDATE)
1043 ctrl->loaded = 0;
1044
1045 if (!ctrl->dirty)
1046 continue;
1047
1048 if (!rollback)
1049 ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id,
1050 dev->intfnum, ctrl->info.selector,
1051 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1052 ctrl->info.size);
1053 else
1054 ret = 0;
1055
1056 if (rollback || ret < 0)
1057 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1058 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1059 ctrl->info.size);
1060
1061 ctrl->dirty = 0;
1062
1063 if (ret < 0)
1064 return ret;
1065 }
1066
1067 return 0;
1068 }
1069
1070 int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback)
1071 {
1072 struct uvc_entity *entity;
1073 int ret = 0;
1074
1075 /* Find the control. */
1076 list_for_each_entry(entity, &chain->entities, chain) {
1077 ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback);
1078 if (ret < 0)
1079 goto done;
1080 }
1081
1082 done:
1083 mutex_unlock(&chain->ctrl_mutex);
1084 return ret;
1085 }
1086
1087 int uvc_ctrl_get(struct uvc_video_chain *chain,
1088 struct v4l2_ext_control *xctrl)
1089 {
1090 struct uvc_control *ctrl;
1091 struct uvc_control_mapping *mapping;
1092 struct uvc_menu_info *menu;
1093 unsigned int i;
1094 int ret;
1095
1096 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1097 if (ctrl == NULL || (ctrl->info.flags & UVC_CONTROL_GET_CUR) == 0)
1098 return -EINVAL;
1099
1100 if (!ctrl->loaded) {
1101 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id,
1102 chain->dev->intfnum, ctrl->info.selector,
1103 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1104 ctrl->info.size);
1105 if (ret < 0)
1106 return ret;
1107
1108 ctrl->loaded = 1;
1109 }
1110
1111 xctrl->value = mapping->get(mapping, UVC_GET_CUR,
1112 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
1113
1114 if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
1115 menu = mapping->menu_info;
1116 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
1117 if (menu->value == xctrl->value) {
1118 xctrl->value = i;
1119 break;
1120 }
1121 }
1122 }
1123
1124 return 0;
1125 }
1126
1127 int uvc_ctrl_set(struct uvc_video_chain *chain,
1128 struct v4l2_ext_control *xctrl)
1129 {
1130 struct uvc_control *ctrl;
1131 struct uvc_control_mapping *mapping;
1132 s32 value;
1133 u32 step;
1134 s32 min;
1135 s32 max;
1136 int ret;
1137
1138 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1139 if (ctrl == NULL || (ctrl->info.flags & UVC_CONTROL_SET_CUR) == 0)
1140 return -EINVAL;
1141
1142 /* Clamp out of range values. */
1143 switch (mapping->v4l2_type) {
1144 case V4L2_CTRL_TYPE_INTEGER:
1145 if (!ctrl->cached) {
1146 ret = uvc_ctrl_populate_cache(chain, ctrl);
1147 if (ret < 0)
1148 return ret;
1149 }
1150
1151 min = mapping->get(mapping, UVC_GET_MIN,
1152 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
1153 max = mapping->get(mapping, UVC_GET_MAX,
1154 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
1155 step = mapping->get(mapping, UVC_GET_RES,
1156 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1157 if (step == 0)
1158 step = 1;
1159
1160 xctrl->value = min + (xctrl->value - min + step/2) / step * step;
1161 xctrl->value = clamp(xctrl->value, min, max);
1162 value = xctrl->value;
1163 break;
1164
1165 case V4L2_CTRL_TYPE_BOOLEAN:
1166 xctrl->value = clamp(xctrl->value, 0, 1);
1167 value = xctrl->value;
1168 break;
1169
1170 case V4L2_CTRL_TYPE_MENU:
1171 if (xctrl->value < 0 || xctrl->value >= mapping->menu_count)
1172 return -ERANGE;
1173 value = mapping->menu_info[xctrl->value].value;
1174 break;
1175
1176 default:
1177 value = xctrl->value;
1178 break;
1179 }
1180
1181 /* If the mapping doesn't span the whole UVC control, the current value
1182 * needs to be loaded from the device to perform the read-modify-write
1183 * operation.
1184 */
1185 if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) {
1186 if ((ctrl->info.flags & UVC_CONTROL_GET_CUR) == 0) {
1187 memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1188 0, ctrl->info.size);
1189 } else {
1190 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
1191 ctrl->entity->id, chain->dev->intfnum,
1192 ctrl->info.selector,
1193 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1194 ctrl->info.size);
1195 if (ret < 0)
1196 return ret;
1197 }
1198
1199 ctrl->loaded = 1;
1200 }
1201
1202 /* Backup the current value in case we need to rollback later. */
1203 if (!ctrl->dirty) {
1204 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1205 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1206 ctrl->info.size);
1207 }
1208
1209 mapping->set(mapping, value,
1210 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
1211
1212 ctrl->dirty = 1;
1213 ctrl->modified = 1;
1214 return 0;
1215 }
1216
1217 /* --------------------------------------------------------------------------
1218 * Dynamic controls
1219 */
1220
1221 static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev,
1222 const struct uvc_control *ctrl, struct uvc_control_info *info)
1223 {
1224 struct uvc_ctrl_fixup {
1225 struct usb_device_id id;
1226 u8 entity;
1227 u8 selector;
1228 u8 flags;
1229 };
1230
1231 static const struct uvc_ctrl_fixup fixups[] = {
1232 { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1,
1233 UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
1234 UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
1235 UVC_CONTROL_AUTO_UPDATE },
1236 { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1,
1237 UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
1238 UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
1239 UVC_CONTROL_AUTO_UPDATE },
1240 { { USB_DEVICE(0x046d, 0x0994) }, 9, 1,
1241 UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
1242 UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
1243 UVC_CONTROL_AUTO_UPDATE },
1244 };
1245
1246 unsigned int i;
1247
1248 for (i = 0; i < ARRAY_SIZE(fixups); ++i) {
1249 if (!usb_match_one_id(dev->intf, &fixups[i].id))
1250 continue;
1251
1252 if (fixups[i].entity == ctrl->entity->id &&
1253 fixups[i].selector == info->selector) {
1254 info->flags = fixups[i].flags;
1255 return;
1256 }
1257 }
1258 }
1259
1260 /*
1261 * Query control information (size and flags) for XU controls.
1262 */
1263 static int uvc_ctrl_fill_xu_info(struct uvc_device *dev,
1264 const struct uvc_control *ctrl, struct uvc_control_info *info)
1265 {
1266 u8 *data;
1267 int ret;
1268
1269 data = kmalloc(2, GFP_KERNEL);
1270 if (data == NULL)
1271 return -ENOMEM;
1272
1273 memcpy(info->entity, ctrl->entity->extension.guidExtensionCode,
1274 sizeof(info->entity));
1275 info->index = ctrl->index;
1276 info->selector = ctrl->index + 1;
1277
1278 /* Query and verify the control length (GET_LEN) */
1279 ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum,
1280 info->selector, data, 2);
1281 if (ret < 0) {
1282 uvc_trace(UVC_TRACE_CONTROL,
1283 "GET_LEN failed on control %pUl/%u (%d).\n",
1284 info->entity, info->selector, ret);
1285 goto done;
1286 }
1287
1288 info->size = le16_to_cpup((__le16 *)data);
1289
1290 /* Query the control information (GET_INFO) */
1291 ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum,
1292 info->selector, data, 1);
1293 if (ret < 0) {
1294 uvc_trace(UVC_TRACE_CONTROL,
1295 "GET_INFO failed on control %pUl/%u (%d).\n",
1296 info->entity, info->selector, ret);
1297 goto done;
1298 }
1299
1300 info->flags = UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX
1301 | UVC_CONTROL_GET_RES | UVC_CONTROL_GET_DEF
1302 | (data[0] & UVC_CONTROL_CAP_GET ? UVC_CONTROL_GET_CUR : 0)
1303 | (data[0] & UVC_CONTROL_CAP_SET ? UVC_CONTROL_SET_CUR : 0)
1304 | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ?
1305 UVC_CONTROL_AUTO_UPDATE : 0);
1306
1307 uvc_ctrl_fixup_xu_info(dev, ctrl, info);
1308
1309 uvc_trace(UVC_TRACE_CONTROL, "XU control %pUl/%u queried: len %u, "
1310 "flags { get %u set %u auto %u }.\n",
1311 info->entity, info->selector, info->size,
1312 (info->flags & UVC_CONTROL_GET_CUR) ? 1 : 0,
1313 (info->flags & UVC_CONTROL_SET_CUR) ? 1 : 0,
1314 (info->flags & UVC_CONTROL_AUTO_UPDATE) ? 1 : 0);
1315
1316 done:
1317 kfree(data);
1318 return ret;
1319 }
1320
1321 static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
1322 const struct uvc_control_info *info);
1323
1324 static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev,
1325 struct uvc_control *ctrl)
1326 {
1327 struct uvc_control_info info;
1328 int ret;
1329
1330 if (ctrl->initialized)
1331 return 0;
1332
1333 ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info);
1334 if (ret < 0)
1335 return ret;
1336
1337 ret = uvc_ctrl_add_info(dev, ctrl, &info);
1338 if (ret < 0)
1339 uvc_trace(UVC_TRACE_CONTROL, "Failed to initialize control "
1340 "%pUl/%u on device %s entity %u\n", info.entity,
1341 info.selector, dev->udev->devpath, ctrl->entity->id);
1342
1343 return ret;
1344 }
1345
1346 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
1347 struct uvc_xu_control *xctrl, int set)
1348 {
1349 struct uvc_entity *entity;
1350 struct uvc_control *ctrl = NULL;
1351 unsigned int i, found = 0;
1352 int restore = 0;
1353 __u8 *data;
1354 int ret;
1355
1356 /* Find the extension unit. */
1357 list_for_each_entry(entity, &chain->entities, chain) {
1358 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT &&
1359 entity->id == xctrl->unit)
1360 break;
1361 }
1362
1363 if (entity->id != xctrl->unit) {
1364 uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n",
1365 xctrl->unit);
1366 return -EINVAL;
1367 }
1368
1369 /* Find the control and perform delayed initialization if needed. */
1370 for (i = 0; i < entity->ncontrols; ++i) {
1371 ctrl = &entity->controls[i];
1372 if (ctrl->index == xctrl->selector - 1) {
1373 found = 1;
1374 break;
1375 }
1376 }
1377
1378 if (!found) {
1379 uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n",
1380 entity->extension.guidExtensionCode, xctrl->selector);
1381 return -EINVAL;
1382 }
1383
1384 if (mutex_lock_interruptible(&chain->ctrl_mutex))
1385 return -ERESTARTSYS;
1386
1387 ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl);
1388 if (ret < 0) {
1389 ret = -ENOENT;
1390 goto done;
1391 }
1392
1393 /* Validate control data size. */
1394 if (ctrl->info.size != xctrl->size) {
1395 ret = -EINVAL;
1396 goto done;
1397 }
1398
1399 if ((set && !(ctrl->info.flags & UVC_CONTROL_SET_CUR)) ||
1400 (!set && !(ctrl->info.flags & UVC_CONTROL_GET_CUR))) {
1401 ret = -EINVAL;
1402 goto done;
1403 }
1404
1405 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1406 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1407 ctrl->info.size);
1408 data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT);
1409 restore = set;
1410
1411 if (set && copy_from_user(data, xctrl->data, xctrl->size)) {
1412 ret = -EFAULT;
1413 goto done;
1414 }
1415
1416 ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR,
1417 xctrl->unit, chain->dev->intfnum, xctrl->selector,
1418 data, xctrl->size);
1419 if (ret < 0)
1420 goto done;
1421
1422 if (!set && copy_to_user(xctrl->data, data, xctrl->size))
1423 ret = -EFAULT;
1424 done:
1425 if (ret && restore)
1426 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1427 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1428 xctrl->size);
1429
1430 mutex_unlock(&chain->ctrl_mutex);
1431 return ret;
1432 }
1433
1434 /* --------------------------------------------------------------------------
1435 * Suspend/resume
1436 */
1437
1438 /*
1439 * Restore control values after resume, skipping controls that haven't been
1440 * changed.
1441 *
1442 * TODO
1443 * - Don't restore modified controls that are back to their default value.
1444 * - Handle restore order (Auto-Exposure Mode should be restored before
1445 * Exposure Time).
1446 */
1447 int uvc_ctrl_resume_device(struct uvc_device *dev)
1448 {
1449 struct uvc_control *ctrl;
1450 struct uvc_entity *entity;
1451 unsigned int i;
1452 int ret;
1453
1454 /* Walk the entities list and restore controls when possible. */
1455 list_for_each_entry(entity, &dev->entities, list) {
1456
1457 for (i = 0; i < entity->ncontrols; ++i) {
1458 ctrl = &entity->controls[i];
1459
1460 if (!ctrl->initialized || !ctrl->modified ||
1461 (ctrl->info.flags & UVC_CONTROL_RESTORE) == 0)
1462 continue;
1463
1464 printk(KERN_INFO "restoring control %pUl/%u/%u\n",
1465 ctrl->info.entity, ctrl->info.index,
1466 ctrl->info.selector);
1467 ctrl->dirty = 1;
1468 }
1469
1470 ret = uvc_ctrl_commit_entity(dev, entity, 0);
1471 if (ret < 0)
1472 return ret;
1473 }
1474
1475 return 0;
1476 }
1477
1478 /* --------------------------------------------------------------------------
1479 * Control and mapping handling
1480 */
1481
1482 /*
1483 * Add control information to a given control.
1484 */
1485 static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
1486 const struct uvc_control_info *info)
1487 {
1488 int ret = 0;
1489
1490 memcpy(&ctrl->info, info, sizeof(*info));
1491 INIT_LIST_HEAD(&ctrl->info.mappings);
1492
1493 /* Allocate an array to save control values (cur, def, max, etc.) */
1494 ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1,
1495 GFP_KERNEL);
1496 if (ctrl->uvc_data == NULL) {
1497 ret = -ENOMEM;
1498 goto done;
1499 }
1500
1501 ctrl->initialized = 1;
1502
1503 uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s "
1504 "entity %u\n", ctrl->info.entity, ctrl->info.selector,
1505 dev->udev->devpath, ctrl->entity->id);
1506
1507 done:
1508 if (ret < 0)
1509 kfree(ctrl->uvc_data);
1510 return ret;
1511 }
1512
1513 /*
1514 * Add a control mapping to a given control.
1515 */
1516 static int __uvc_ctrl_add_mapping(struct uvc_device *dev,
1517 struct uvc_control *ctrl, const struct uvc_control_mapping *mapping)
1518 {
1519 struct uvc_control_mapping *map;
1520 unsigned int size;
1521
1522 /* Most mappings come from static kernel data and need to be duplicated.
1523 * Mappings that come from userspace will be unnecessarily duplicated,
1524 * this could be optimized.
1525 */
1526 map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL);
1527 if (map == NULL)
1528 return -ENOMEM;
1529
1530 size = sizeof(*mapping->menu_info) * mapping->menu_count;
1531 map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL);
1532 if (map->menu_info == NULL) {
1533 kfree(map);
1534 return -ENOMEM;
1535 }
1536
1537 if (map->get == NULL)
1538 map->get = uvc_get_le_value;
1539 if (map->set == NULL)
1540 map->set = uvc_set_le_value;
1541
1542 map->ctrl = &ctrl->info;
1543 list_add_tail(&map->list, &ctrl->info.mappings);
1544 uvc_trace(UVC_TRACE_CONTROL,
1545 "Adding mapping '%s' to control %pUl/%u.\n",
1546 map->name, ctrl->info.entity, ctrl->info.selector);
1547
1548 return 0;
1549 }
1550
1551 int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
1552 const struct uvc_control_mapping *mapping)
1553 {
1554 struct uvc_device *dev = chain->dev;
1555 struct uvc_control_mapping *map;
1556 struct uvc_entity *entity;
1557 struct uvc_control *ctrl;
1558 int found = 0;
1559 int ret;
1560
1561 if (mapping->id & ~V4L2_CTRL_ID_MASK) {
1562 uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control "
1563 "id 0x%08x is invalid.\n", mapping->name,
1564 mapping->id);
1565 return -EINVAL;
1566 }
1567
1568 /* Search for the matching (GUID/CS) control in the given device */
1569 list_for_each_entry(entity, &dev->entities, list) {
1570 unsigned int i;
1571
1572 if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT ||
1573 !uvc_entity_match_guid(entity, mapping->entity))
1574 continue;
1575
1576 for (i = 0; i < entity->ncontrols; ++i) {
1577 ctrl = &entity->controls[i];
1578 if (ctrl->index == mapping->selector - 1) {
1579 found = 1;
1580 break;
1581 }
1582 }
1583
1584 if (found)
1585 break;
1586 }
1587 if (!found)
1588 return -ENOENT;
1589
1590 if (mutex_lock_interruptible(&chain->ctrl_mutex))
1591 return -ERESTARTSYS;
1592
1593 /* Perform delayed initialization of XU controls */
1594 ret = uvc_ctrl_init_xu_ctrl(dev, ctrl);
1595 if (ret < 0) {
1596 ret = -ENOENT;
1597 goto done;
1598 }
1599
1600 list_for_each_entry(map, &ctrl->info.mappings, list) {
1601 if (mapping->id == map->id) {
1602 uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', "
1603 "control id 0x%08x already exists.\n",
1604 mapping->name, mapping->id);
1605 ret = -EEXIST;
1606 goto done;
1607 }
1608 }
1609
1610 /* Prevent excess memory consumption */
1611 if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) {
1612 atomic_dec(&dev->nmappings);
1613 uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum "
1614 "mappings count (%u) exceeded.\n", mapping->name,
1615 UVC_MAX_CONTROL_MAPPINGS);
1616 ret = -ENOMEM;
1617 goto done;
1618 }
1619
1620 ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping);
1621 if (ret < 0)
1622 atomic_dec(&dev->nmappings);
1623
1624 done:
1625 mutex_unlock(&chain->ctrl_mutex);
1626 return ret;
1627 }
1628
1629 /*
1630 * Prune an entity of its bogus controls using a blacklist. Bogus controls
1631 * are currently the ones that crash the camera or unconditionally return an
1632 * error when queried.
1633 */
1634 static void uvc_ctrl_prune_entity(struct uvc_device *dev,
1635 struct uvc_entity *entity)
1636 {
1637 struct uvc_ctrl_blacklist {
1638 struct usb_device_id id;
1639 u8 index;
1640 };
1641
1642 static const struct uvc_ctrl_blacklist processing_blacklist[] = {
1643 { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */
1644 { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */
1645 { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */
1646 };
1647 static const struct uvc_ctrl_blacklist camera_blacklist[] = {
1648 { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */
1649 };
1650
1651 const struct uvc_ctrl_blacklist *blacklist;
1652 unsigned int size;
1653 unsigned int count;
1654 unsigned int i;
1655 u8 *controls;
1656
1657 switch (UVC_ENTITY_TYPE(entity)) {
1658 case UVC_VC_PROCESSING_UNIT:
1659 blacklist = processing_blacklist;
1660 count = ARRAY_SIZE(processing_blacklist);
1661 controls = entity->processing.bmControls;
1662 size = entity->processing.bControlSize;
1663 break;
1664
1665 case UVC_ITT_CAMERA:
1666 blacklist = camera_blacklist;
1667 count = ARRAY_SIZE(camera_blacklist);
1668 controls = entity->camera.bmControls;
1669 size = entity->camera.bControlSize;
1670 break;
1671
1672 default:
1673 return;
1674 }
1675
1676 for (i = 0; i < count; ++i) {
1677 if (!usb_match_one_id(dev->intf, &blacklist[i].id))
1678 continue;
1679
1680 if (blacklist[i].index >= 8 * size ||
1681 !uvc_test_bit(controls, blacklist[i].index))
1682 continue;
1683
1684 uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, "
1685 "removing it.\n", entity->id, blacklist[i].index);
1686
1687 uvc_clear_bit(controls, blacklist[i].index);
1688 }
1689 }
1690
1691 /*
1692 * Add control information and hardcoded stock control mappings to the given
1693 * device.
1694 */
1695 static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl)
1696 {
1697 const struct uvc_control_info *info = uvc_ctrls;
1698 const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls);
1699 const struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
1700 const struct uvc_control_mapping *mend =
1701 mapping + ARRAY_SIZE(uvc_ctrl_mappings);
1702
1703 /* XU controls initialization requires querying the device for control
1704 * information. As some buggy UVC devices will crash when queried
1705 * repeatedly in a tight loop, delay XU controls initialization until
1706 * first use.
1707 */
1708 if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT)
1709 return;
1710
1711 for (; info < iend; ++info) {
1712 if (uvc_entity_match_guid(ctrl->entity, info->entity) &&
1713 ctrl->index == info->index) {
1714 uvc_ctrl_add_info(dev, ctrl, info);
1715 break;
1716 }
1717 }
1718
1719 if (!ctrl->initialized)
1720 return;
1721
1722 for (; mapping < mend; ++mapping) {
1723 if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
1724 ctrl->info.selector == mapping->selector)
1725 __uvc_ctrl_add_mapping(dev, ctrl, mapping);
1726 }
1727 }
1728
1729 /*
1730 * Initialize device controls.
1731 */
1732 int uvc_ctrl_init_device(struct uvc_device *dev)
1733 {
1734 struct uvc_entity *entity;
1735 unsigned int i;
1736
1737 /* Walk the entities list and instantiate controls */
1738 list_for_each_entry(entity, &dev->entities, list) {
1739 struct uvc_control *ctrl;
1740 unsigned int bControlSize = 0, ncontrols = 0;
1741 __u8 *bmControls = NULL;
1742
1743 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
1744 bmControls = entity->extension.bmControls;
1745 bControlSize = entity->extension.bControlSize;
1746 } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) {
1747 bmControls = entity->processing.bmControls;
1748 bControlSize = entity->processing.bControlSize;
1749 } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) {
1750 bmControls = entity->camera.bmControls;
1751 bControlSize = entity->camera.bControlSize;
1752 }
1753
1754 /* Remove bogus/blacklisted controls */
1755 uvc_ctrl_prune_entity(dev, entity);
1756
1757 /* Count supported controls and allocate the controls array */
1758 for (i = 0; i < bControlSize; ++i)
1759 ncontrols += hweight8(bmControls[i]);
1760 if (ncontrols == 0)
1761 continue;
1762
1763 entity->controls = kzalloc(ncontrols * sizeof(*ctrl),
1764 GFP_KERNEL);
1765 if (entity->controls == NULL)
1766 return -ENOMEM;
1767 entity->ncontrols = ncontrols;
1768
1769 /* Initialize all supported controls */
1770 ctrl = entity->controls;
1771 for (i = 0; i < bControlSize * 8; ++i) {
1772 if (uvc_test_bit(bmControls, i) == 0)
1773 continue;
1774
1775 ctrl->entity = entity;
1776 ctrl->index = i;
1777
1778 uvc_ctrl_init_ctrl(dev, ctrl);
1779 ctrl++;
1780 }
1781 }
1782
1783 return 0;
1784 }
1785
1786 /*
1787 * Cleanup device controls.
1788 */
1789 static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
1790 struct uvc_control *ctrl)
1791 {
1792 struct uvc_control_mapping *mapping, *nm;
1793
1794 list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
1795 list_del(&mapping->list);
1796 kfree(mapping->menu_info);
1797 kfree(mapping);
1798 }
1799 }
1800
1801 void uvc_ctrl_cleanup_device(struct uvc_device *dev)
1802 {
1803 struct uvc_entity *entity;
1804 unsigned int i;
1805
1806 /* Free controls and control mappings for all entities. */
1807 list_for_each_entry(entity, &dev->entities, list) {
1808 for (i = 0; i < entity->ncontrols; ++i) {
1809 struct uvc_control *ctrl = &entity->controls[i];
1810
1811 if (!ctrl->initialized)
1812 continue;
1813
1814 uvc_ctrl_cleanup_mappings(dev, ctrl);
1815 kfree(ctrl->uvc_data);
1816 }
1817
1818 kfree(entity->controls);
1819 }
1820 }
CRIS linux kernel tree