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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / media / video / uvc / uvc_ctrl.c
blob3b153521f53cd26ecb0d8f8df93a2ab7d21b8de2
1 /*
2 * uvc_ctrl.c -- USB Video Class driver - Controls
3 *
4 * Copyright (C) 2005-2009
5 * Laurent Pinchart (laurent.pinchart@skynet.be)
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(struct uvc_entity *entity, __u8 guid[16])
731 {
732 switch (UVC_ENTITY_TYPE(entity)) {
733 case UVC_ITT_CAMERA:
734 return memcmp(uvc_camera_guid, guid, 16) == 0;
735
736 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
737 return memcmp(uvc_media_transport_input_guid, guid, 16) == 0;
738
739 case UVC_VC_PROCESSING_UNIT:
740 return memcmp(uvc_processing_guid, guid, 16) == 0;
741
742 case UVC_VC_EXTENSION_UNIT:
743 return memcmp(entity->extension.guidExtensionCode,
744 guid, 16) == 0;
745
746 default:
747 return 0;
748 }
749 }
750
751 /* ------------------------------------------------------------------------
752 * UVC Controls
753 */
754
755 static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id,
756 struct uvc_control_mapping **mapping, struct uvc_control **control,
757 int next)
758 {
759 struct uvc_control *ctrl;
760 struct uvc_control_mapping *map;
761 unsigned int i;
762
763 if (entity == NULL)
764 return;
765
766 for (i = 0; i < entity->ncontrols; ++i) {
767 ctrl = &entity->controls[i];
768 if (ctrl->info == NULL)
769 continue;
770
771 list_for_each_entry(map, &ctrl->info->mappings, list) {
772 if ((map->id == v4l2_id) && !next) {
773 *control = ctrl;
774 *mapping = map;
775 return;
776 }
777
778 if ((*mapping == NULL || (*mapping)->id > map->id) &&
779 (map->id > v4l2_id) && next) {
780 *control = ctrl;
781 *mapping = map;
782 }
783 }
784 }
785 }
786
787 struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
788 __u32 v4l2_id, struct uvc_control_mapping **mapping)
789 {
790 struct uvc_control *ctrl = NULL;
791 struct uvc_entity *entity;
792 int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL;
793
794 *mapping = NULL;
795
796 /* Mask the query flags. */
797 v4l2_id &= V4L2_CTRL_ID_MASK;
798
799 /* Find the control. */
800 list_for_each_entry(entity, &chain->entities, chain) {
801 __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next);
802 if (ctrl && !next)
803 return ctrl;
804 }
805
806 if (ctrl == NULL && !next)
807 uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n",
808 v4l2_id);
809
810 return ctrl;
811 }
812
813 static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain,
814 struct uvc_control *ctrl)
815 {
816 int ret;
817
818 if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
819 ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
820 chain->dev->intfnum, ctrl->info->selector,
821 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF),
822 ctrl->info->size);
823 if (ret < 0)
824 return ret;
825 }
826
827 if (ctrl->info->flags & UVC_CONTROL_GET_MIN) {
828 ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
829 chain->dev->intfnum, ctrl->info->selector,
830 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN),
831 ctrl->info->size);
832 if (ret < 0)
833 return ret;
834 }
835 if (ctrl->info->flags & UVC_CONTROL_GET_MAX) {
836 ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
837 chain->dev->intfnum, ctrl->info->selector,
838 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX),
839 ctrl->info->size);
840 if (ret < 0)
841 return ret;
842 }
843 if (ctrl->info->flags & UVC_CONTROL_GET_RES) {
844 ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
845 chain->dev->intfnum, ctrl->info->selector,
846 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES),
847 ctrl->info->size);
848 if (ret < 0)
849 return ret;
850 }
851
852 ctrl->cached = 1;
853 return 0;
854 }
855
856 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
857 struct v4l2_queryctrl *v4l2_ctrl)
858 {
859 struct uvc_control *ctrl;
860 struct uvc_control_mapping *mapping;
861 struct uvc_menu_info *menu;
862 unsigned int i;
863 int ret;
864
865 ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
866 if (ctrl == NULL)
867 return -EINVAL;
868
869 memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
870 v4l2_ctrl->id = mapping->id;
871 v4l2_ctrl->type = mapping->v4l2_type;
872 strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
873 v4l2_ctrl->flags = 0;
874
875 if (!(ctrl->info->flags & UVC_CONTROL_GET_CUR))
876 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
877 if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR))
878 v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
879
880 if (!ctrl->cached) {
881 ret = uvc_ctrl_populate_cache(chain, ctrl);
882 if (ret < 0)
883 return ret;
884 }
885
886 if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
887 v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF,
888 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF));
889 }
890
891 switch (mapping->v4l2_type) {
892 case V4L2_CTRL_TYPE_MENU:
893 v4l2_ctrl->minimum = 0;
894 v4l2_ctrl->maximum = mapping->menu_count - 1;
895 v4l2_ctrl->step = 1;
896
897 menu = mapping->menu_info;
898 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
899 if (menu->value == v4l2_ctrl->default_value) {
900 v4l2_ctrl->default_value = i;
901 break;
902 }
903 }
904
905 return 0;
906
907 case V4L2_CTRL_TYPE_BOOLEAN:
908 v4l2_ctrl->minimum = 0;
909 v4l2_ctrl->maximum = 1;
910 v4l2_ctrl->step = 1;
911 return 0;
912
913 case V4L2_CTRL_TYPE_BUTTON:
914 v4l2_ctrl->minimum = 0;
915 v4l2_ctrl->maximum = 0;
916 v4l2_ctrl->step = 0;
917 return 0;
918
919 default:
920 break;
921 }
922
923 if (ctrl->info->flags & UVC_CONTROL_GET_MIN)
924 v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
925 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
926
927 if (ctrl->info->flags & UVC_CONTROL_GET_MAX)
928 v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
929 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
930
931 if (ctrl->info->flags & UVC_CONTROL_GET_RES)
932 v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES,
933 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
934
935 return 0;
936 }
937
938
939 /* --------------------------------------------------------------------------
940 * Control transactions
941 *
942 * To make extended set operations as atomic as the hardware allows, controls
943 * are handled using begin/commit/rollback operations.
944 *
945 * At the beginning of a set request, uvc_ctrl_begin should be called to
946 * initialize the request. This function acquires the control lock.
947 *
948 * When setting a control, the new value is stored in the control data field
949 * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for
950 * later processing. If the UVC and V4L2 control sizes differ, the current
951 * value is loaded from the hardware before storing the new value in the data
952 * field.
953 *
954 * After processing all controls in the transaction, uvc_ctrl_commit or
955 * uvc_ctrl_rollback must be called to apply the pending changes to the
956 * hardware or revert them. When applying changes, all controls marked as
957 * dirty will be modified in the UVC device, and the dirty flag will be
958 * cleared. When reverting controls, the control data field
959 * UVC_CTRL_DATA_CURRENT is reverted to its previous value
960 * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the
961 * control lock.
962 */
963 int uvc_ctrl_begin(struct uvc_video_chain *chain)
964 {
965 return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0;
966 }
967
968 static int uvc_ctrl_commit_entity(struct uvc_device *dev,
969 struct uvc_entity *entity, int rollback)
970 {
971 struct uvc_control *ctrl;
972 unsigned int i;
973 int ret;
974
975 if (entity == NULL)
976 return 0;
977
978 for (i = 0; i < entity->ncontrols; ++i) {
979 ctrl = &entity->controls[i];
980 if (ctrl->info == NULL)
981 continue;
982
983 /* Reset the loaded flag for auto-update controls that were
984 * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent
985 * uvc_ctrl_get from using the cached value.
986 */
987 if (ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE)
988 ctrl->loaded = 0;
989
990 if (!ctrl->dirty)
991 continue;
992
993 if (!rollback)
994 ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id,
995 dev->intfnum, ctrl->info->selector,
996 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
997 ctrl->info->size);
998 else
999 ret = 0;
1000
1001 if (rollback || ret < 0)
1002 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1003 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1004 ctrl->info->size);
1005
1006 ctrl->dirty = 0;
1007
1008 if (ret < 0)
1009 return ret;
1010 }
1011
1012 return 0;
1013 }
1014
1015 int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback)
1016 {
1017 struct uvc_entity *entity;
1018 int ret = 0;
1019
1020 /* Find the control. */
1021 list_for_each_entry(entity, &chain->entities, chain) {
1022 ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback);
1023 if (ret < 0)
1024 goto done;
1025 }
1026
1027 done:
1028 mutex_unlock(&chain->ctrl_mutex);
1029 return ret;
1030 }
1031
1032 int uvc_ctrl_get(struct uvc_video_chain *chain,
1033 struct v4l2_ext_control *xctrl)
1034 {
1035 struct uvc_control *ctrl;
1036 struct uvc_control_mapping *mapping;
1037 struct uvc_menu_info *menu;
1038 unsigned int i;
1039 int ret;
1040
1041 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1042 if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0)
1043 return -EINVAL;
1044
1045 if (!ctrl->loaded) {
1046 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id,
1047 chain->dev->intfnum, ctrl->info->selector,
1048 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1049 ctrl->info->size);
1050 if (ret < 0)
1051 return ret;
1052
1053 ctrl->loaded = 1;
1054 }
1055
1056 xctrl->value = mapping->get(mapping, UVC_GET_CUR,
1057 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
1058
1059 if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
1060 menu = mapping->menu_info;
1061 for (i = 0; i < mapping->menu_count; ++i, ++menu) {
1062 if (menu->value == xctrl->value) {
1063 xctrl->value = i;
1064 break;
1065 }
1066 }
1067 }
1068
1069 return 0;
1070 }
1071
1072 int uvc_ctrl_set(struct uvc_video_chain *chain,
1073 struct v4l2_ext_control *xctrl)
1074 {
1075 struct uvc_control *ctrl;
1076 struct uvc_control_mapping *mapping;
1077 s32 value;
1078 u32 step;
1079 s32 min;
1080 s32 max;
1081 int ret;
1082
1083 ctrl = uvc_find_control(chain, xctrl->id, &mapping);
1084 if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0)
1085 return -EINVAL;
1086
1087 /* Clamp out of range values. */
1088 switch (mapping->v4l2_type) {
1089 case V4L2_CTRL_TYPE_INTEGER:
1090 if (!ctrl->cached) {
1091 ret = uvc_ctrl_populate_cache(chain, ctrl);
1092 if (ret < 0)
1093 return ret;
1094 }
1095
1096 min = mapping->get(mapping, UVC_GET_MIN,
1097 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
1098 max = mapping->get(mapping, UVC_GET_MAX,
1099 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
1100 step = mapping->get(mapping, UVC_GET_RES,
1101 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
1102 if (step == 0)
1103 step = 1;
1104
1105 xctrl->value = min + (xctrl->value - min + step/2) / step * step;
1106 xctrl->value = clamp(xctrl->value, min, max);
1107 value = xctrl->value;
1108 break;
1109
1110 case V4L2_CTRL_TYPE_BOOLEAN:
1111 xctrl->value = clamp(xctrl->value, 0, 1);
1112 value = xctrl->value;
1113 break;
1114
1115 case V4L2_CTRL_TYPE_MENU:
1116 if (xctrl->value < 0 || xctrl->value >= mapping->menu_count)
1117 return -ERANGE;
1118 value = mapping->menu_info[xctrl->value].value;
1119 break;
1120
1121 default:
1122 value = xctrl->value;
1123 break;
1124 }
1125
1126 /* If the mapping doesn't span the whole UVC control, the current value
1127 * needs to be loaded from the device to perform the read-modify-write
1128 * operation.
1129 */
1130 if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) {
1131 if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) {
1132 memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1133 0, ctrl->info->size);
1134 } else {
1135 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
1136 ctrl->entity->id, chain->dev->intfnum,
1137 ctrl->info->selector,
1138 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1139 ctrl->info->size);
1140 if (ret < 0)
1141 return ret;
1142 }
1143
1144 ctrl->loaded = 1;
1145 }
1146
1147 /* Backup the current value in case we need to rollback later. */
1148 if (!ctrl->dirty) {
1149 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1150 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1151 ctrl->info->size);
1152 }
1153
1154 mapping->set(mapping, value,
1155 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
1156
1157 ctrl->dirty = 1;
1158 ctrl->modified = 1;
1159 return 0;
1160 }
1161
1162 /* --------------------------------------------------------------------------
1163 * Dynamic controls
1164 */
1165
1166 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
1167 struct uvc_xu_control *xctrl, int set)
1168 {
1169 struct uvc_entity *entity;
1170 struct uvc_control *ctrl = NULL;
1171 unsigned int i, found = 0;
1172 __u8 *data;
1173 int ret;
1174
1175 /* Find the extension unit. */
1176 list_for_each_entry(entity, &chain->entities, chain) {
1177 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT &&
1178 entity->id == xctrl->unit)
1179 break;
1180 }
1181
1182 if (entity->id != xctrl->unit) {
1183 uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n",
1184 xctrl->unit);
1185 return -EINVAL;
1186 }
1187
1188 /* Find the control. */
1189 for (i = 0; i < entity->ncontrols; ++i) {
1190 ctrl = &entity->controls[i];
1191 if (ctrl->info == NULL)
1192 continue;
1193
1194 if (ctrl->info->selector == xctrl->selector) {
1195 found = 1;
1196 break;
1197 }
1198 }
1199
1200 if (!found) {
1201 uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n",
1202 entity->extension.guidExtensionCode, xctrl->selector);
1203 return -EINVAL;
1204 }
1205
1206 /* Validate control data size. */
1207 if (ctrl->info->size != xctrl->size)
1208 return -EINVAL;
1209
1210 if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) ||
1211 (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR)))
1212 return -EINVAL;
1213
1214 if (mutex_lock_interruptible(&chain->ctrl_mutex))
1215 return -ERESTARTSYS;
1216
1217 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1218 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1219 xctrl->size);
1220 data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT);
1221
1222 if (set && copy_from_user(data, xctrl->data, xctrl->size)) {
1223 ret = -EFAULT;
1224 goto out;
1225 }
1226
1227 ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR,
1228 xctrl->unit, chain->dev->intfnum, xctrl->selector,
1229 data, xctrl->size);
1230 if (ret < 0)
1231 goto out;
1232
1233 if (!set && copy_to_user(xctrl->data, data, xctrl->size)) {
1234 ret = -EFAULT;
1235 goto out;
1236 }
1237
1238 out:
1239 if (ret)
1240 memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
1241 uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
1242 xctrl->size);
1243
1244 mutex_unlock(&chain->ctrl_mutex);
1245 return ret;
1246 }
1247
1248 /* --------------------------------------------------------------------------
1249 * Suspend/resume
1250 */
1251
1252 /*
1253 * Restore control values after resume, skipping controls that haven't been
1254 * changed.
1255 *
1256 * TODO
1257 * - Don't restore modified controls that are back to their default value.
1258 * - Handle restore order (Auto-Exposure Mode should be restored before
1259 * Exposure Time).
1260 */
1261 int uvc_ctrl_resume_device(struct uvc_device *dev)
1262 {
1263 struct uvc_control *ctrl;
1264 struct uvc_entity *entity;
1265 unsigned int i;
1266 int ret;
1267
1268 /* Walk the entities list and restore controls when possible. */
1269 list_for_each_entry(entity, &dev->entities, list) {
1270
1271 for (i = 0; i < entity->ncontrols; ++i) {
1272 ctrl = &entity->controls[i];
1273
1274 if (ctrl->info == NULL || !ctrl->modified ||
1275 (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0)
1276 continue;
1277
1278 printk(KERN_INFO "restoring control %pUl/%u/%u\n",
1279 ctrl->info->entity, ctrl->info->index,
1280 ctrl->info->selector);
1281 ctrl->dirty = 1;
1282 }
1283
1284 ret = uvc_ctrl_commit_entity(dev, entity, 0);
1285 if (ret < 0)
1286 return ret;
1287 }
1288
1289 return 0;
1290 }
1291
1292 /* --------------------------------------------------------------------------
1293 * Control and mapping handling
1294 */
1295
1296 static int uvc_ctrl_add_ctrl(struct uvc_device *dev,
1297 struct uvc_control_info *info)
1298 {
1299 struct uvc_entity *entity;
1300 struct uvc_control *ctrl = NULL;
1301 int ret = 0, found = 0;
1302 unsigned int i;
1303 u8 *uvc_info;
1304 u8 *uvc_data;
1305
1306 list_for_each_entry(entity, &dev->entities, list) {
1307 if (!uvc_entity_match_guid(entity, info->entity))
1308 continue;
1309
1310 for (i = 0; i < entity->ncontrols; ++i) {
1311 ctrl = &entity->controls[i];
1312 if (ctrl->index == info->index) {
1313 found = 1;
1314 break;
1315 }
1316 }
1317
1318 if (found)
1319 break;
1320 }
1321
1322 if (!found)
1323 return 0;
1324
1325 uvc_data = kmalloc(info->size * UVC_CTRL_DATA_LAST + 1, GFP_KERNEL);
1326 if (uvc_data == NULL)
1327 return -ENOMEM;
1328
1329 uvc_info = uvc_data + info->size * UVC_CTRL_DATA_LAST;
1330
1331 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
1332 /* Check if the device control information and length match
1333 * the user supplied information.
1334 */
1335 ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id,
1336 dev->intfnum, info->selector, uvc_data, 2);
1337 if (ret < 0) {
1338 uvc_trace(UVC_TRACE_CONTROL,
1339 "GET_LEN failed on control %pUl/%u (%d).\n",
1340 info->entity, info->selector, ret);
1341 goto done;
1342 }
1343
1344 if (info->size != le16_to_cpu(*(__le16 *)uvc_data)) {
1345 uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u size "
1346 "doesn't match user supplied value.\n",
1347 info->entity, info->selector);
1348 ret = -EINVAL;
1349 goto done;
1350 }
1351
1352 ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id,
1353 dev->intfnum, info->selector, uvc_info, 1);
1354 if (ret < 0) {
1355 uvc_trace(UVC_TRACE_CONTROL,
1356 "GET_INFO failed on control %pUl/%u (%d).\n",
1357 info->entity, info->selector, ret);
1358 goto done;
1359 }
1360
1361 if (((info->flags & UVC_CONTROL_GET_CUR) &&
1362 !(*uvc_info & UVC_CONTROL_CAP_GET)) ||
1363 ((info->flags & UVC_CONTROL_SET_CUR) &&
1364 !(*uvc_info & UVC_CONTROL_CAP_SET))) {
1365 uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u flags "
1366 "don't match supported operations.\n",
1367 info->entity, info->selector);
1368 ret = -EINVAL;
1369 goto done;
1370 }
1371 }
1372
1373 ctrl->info = info;
1374 ctrl->uvc_data = uvc_data;
1375 ctrl->uvc_info = uvc_info;
1376
1377 uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s "
1378 "entity %u\n", ctrl->info->entity, ctrl->info->selector,
1379 dev->udev->devpath, entity->id);
1380
1381 done:
1382 if (ret < 0)
1383 kfree(uvc_data);
1384
1385 return ret;
1386 }
1387
1388 /*
1389 * Add an item to the UVC control information list, and instantiate a control
1390 * structure for each device that supports the control.
1391 */
1392 int uvc_ctrl_add_info(struct uvc_control_info *info)
1393 {
1394 struct uvc_control_info *ctrl;
1395 struct uvc_device *dev;
1396 int ret = 0;
1397
1398 /* Find matching controls by walking the devices, entities and
1399 * controls list.
1400 */
1401 mutex_lock(&uvc_driver.ctrl_mutex);
1402
1403 /* First check if the list contains a control matching the new one.
1404 * Bail out if it does.
1405 */
1406 list_for_each_entry(ctrl, &uvc_driver.controls, list) {
1407 if (memcmp(ctrl->entity, info->entity, 16))
1408 continue;
1409
1410 if (ctrl->selector == info->selector) {
1411 uvc_trace(UVC_TRACE_CONTROL,
1412 "Control %pUl/%u is already defined.\n",
1413 info->entity, info->selector);
1414 ret = -EEXIST;
1415 goto end;
1416 }
1417 if (ctrl->index == info->index) {
1418 uvc_trace(UVC_TRACE_CONTROL,
1419 "Control %pUl/%u would overwrite index %d.\n",
1420 info->entity, info->selector, info->index);
1421 ret = -EEXIST;
1422 goto end;
1423 }
1424 }
1425
1426 list_for_each_entry(dev, &uvc_driver.devices, list)
1427 uvc_ctrl_add_ctrl(dev, info);
1428
1429 INIT_LIST_HEAD(&info->mappings);
1430 list_add_tail(&info->list, &uvc_driver.controls);
1431 end:
1432 mutex_unlock(&uvc_driver.ctrl_mutex);
1433 return ret;
1434 }
1435
1436 int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping)
1437 {
1438 struct uvc_control_info *info;
1439 struct uvc_control_mapping *map;
1440 int ret = -EINVAL;
1441
1442 if (mapping->get == NULL)
1443 mapping->get = uvc_get_le_value;
1444 if (mapping->set == NULL)
1445 mapping->set = uvc_set_le_value;
1446
1447 if (mapping->id & ~V4L2_CTRL_ID_MASK) {
1448 uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with "
1449 "invalid control id 0x%08x\n", mapping->name,
1450 mapping->id);
1451 return -EINVAL;
1452 }
1453
1454 mutex_lock(&uvc_driver.ctrl_mutex);
1455 list_for_each_entry(info, &uvc_driver.controls, list) {
1456 if (memcmp(info->entity, mapping->entity, 16) ||
1457 info->selector != mapping->selector)
1458 continue;
1459
1460 if (info->size * 8 < mapping->size + mapping->offset) {
1461 uvc_trace(UVC_TRACE_CONTROL,
1462 "Mapping '%s' would overflow control %pUl/%u\n",
1463 mapping->name, info->entity, info->selector);
1464 ret = -EOVERFLOW;
1465 goto end;
1466 }
1467
1468 /* Check if the list contains a mapping matching the new one.
1469 * Bail out if it does.
1470 */
1471 list_for_each_entry(map, &info->mappings, list) {
1472 if (map->id == mapping->id) {
1473 uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is "
1474 "already defined.\n", mapping->name);
1475 ret = -EEXIST;
1476 goto end;
1477 }
1478 }
1479
1480 mapping->ctrl = info;
1481 list_add_tail(&mapping->list, &info->mappings);
1482 uvc_trace(UVC_TRACE_CONTROL,
1483 "Adding mapping %s to control %pUl/%u.\n",
1484 mapping->name, info->entity, info->selector);
1485
1486 ret = 0;
1487 break;
1488 }
1489 end:
1490 mutex_unlock(&uvc_driver.ctrl_mutex);
1491 return ret;
1492 }
1493
1494 /*
1495 * Prune an entity of its bogus controls using a blacklist. Bogus controls
1496 * are currently the ones that crash the camera or unconditionally return an
1497 * error when queried.
1498 */
1499 static void
1500 uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity)
1501 {
1502 static const struct {
1503 struct usb_device_id id;
1504 u8 index;
1505 } blacklist[] = {
1506 { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */
1507 { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */
1508 { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */
1509 };
1510
1511 u8 *controls;
1512 unsigned int size;
1513 unsigned int i;
1514
1515 if (UVC_ENTITY_TYPE(entity) != UVC_VC_PROCESSING_UNIT)
1516 return;
1517
1518 controls = entity->processing.bmControls;
1519 size = entity->processing.bControlSize;
1520
1521 for (i = 0; i < ARRAY_SIZE(blacklist); ++i) {
1522 if (!usb_match_one_id(dev->intf, &blacklist[i].id))
1523 continue;
1524
1525 if (blacklist[i].index >= 8 * size ||
1526 !uvc_test_bit(controls, blacklist[i].index))
1527 continue;
1528
1529 uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, "
1530 "removing it.\n", entity->id, blacklist[i].index);
1531
1532 uvc_clear_bit(controls, blacklist[i].index);
1533 }
1534 }
1535
1536 /*
1537 * Initialize device controls.
1538 */
1539 int uvc_ctrl_init_device(struct uvc_device *dev)
1540 {
1541 struct uvc_control_info *info;
1542 struct uvc_control *ctrl;
1543 struct uvc_entity *entity;
1544 unsigned int i;
1545
1546 /* Walk the entities list and instantiate controls */
1547 list_for_each_entry(entity, &dev->entities, list) {
1548 unsigned int bControlSize = 0, ncontrols = 0;
1549 __u8 *bmControls = NULL;
1550
1551 if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
1552 bmControls = entity->extension.bmControls;
1553 bControlSize = entity->extension.bControlSize;
1554 } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) {
1555 bmControls = entity->processing.bmControls;
1556 bControlSize = entity->processing.bControlSize;
1557 } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) {
1558 bmControls = entity->camera.bmControls;
1559 bControlSize = entity->camera.bControlSize;
1560 }
1561
1562 uvc_ctrl_prune_entity(dev, entity);
1563
1564 for (i = 0; i < bControlSize; ++i)
1565 ncontrols += hweight8(bmControls[i]);
1566
1567 if (ncontrols == 0)
1568 continue;
1569
1570 entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL);
1571 if (entity->controls == NULL)
1572 return -ENOMEM;
1573
1574 entity->ncontrols = ncontrols;
1575
1576 ctrl = entity->controls;
1577 for (i = 0; i < bControlSize * 8; ++i) {
1578 if (uvc_test_bit(bmControls, i) == 0)
1579 continue;
1580
1581 ctrl->entity = entity;
1582 ctrl->index = i;
1583 ctrl++;
1584 }
1585 }
1586
1587 /* Walk the controls info list and associate them with the device
1588 * controls, then add the device to the global device list. This has
1589 * to be done while holding the controls lock, to make sure
1590 * uvc_ctrl_add_info() will not get called in-between.
1591 */
1592 mutex_lock(&uvc_driver.ctrl_mutex);
1593 list_for_each_entry(info, &uvc_driver.controls, list)
1594 uvc_ctrl_add_ctrl(dev, info);
1595
1596 list_add_tail(&dev->list, &uvc_driver.devices);
1597 mutex_unlock(&uvc_driver.ctrl_mutex);
1598
1599 return 0;
1600 }
1601
1602 /*
1603 * Cleanup device controls.
1604 */
1605 void uvc_ctrl_cleanup_device(struct uvc_device *dev)
1606 {
1607 struct uvc_entity *entity;
1608 unsigned int i;
1609
1610 /* Remove the device from the global devices list */
1611 mutex_lock(&uvc_driver.ctrl_mutex);
1612 if (dev->list.next != NULL)
1613 list_del(&dev->list);
1614 mutex_unlock(&uvc_driver.ctrl_mutex);
1615
1616 list_for_each_entry(entity, &dev->entities, list) {
1617 for (i = 0; i < entity->ncontrols; ++i)
1618 kfree(entity->controls[i].uvc_data);
1619
1620 kfree(entity->controls);
1621 }
1622 }
1623
1624 void uvc_ctrl_cleanup(void)
1625 {
1626 struct uvc_control_info *info;
1627 struct uvc_control_info *ni;
1628 struct uvc_control_mapping *mapping;
1629 struct uvc_control_mapping *nm;
1630
1631 list_for_each_entry_safe(info, ni, &uvc_driver.controls, list) {
1632 if (!(info->flags & UVC_CONTROL_EXTENSION))
1633 continue;
1634
1635 list_for_each_entry_safe(mapping, nm, &info->mappings, list) {
1636 list_del(&mapping->list);
1637 kfree(mapping->menu_info);
1638 kfree(mapping);
1639 }
1640
1641 list_del(&info->list);
1642 kfree(info);
1643 }
1644 }
1645
1646 void uvc_ctrl_init(void)
1647 {
1648 struct uvc_control_info *ctrl = uvc_ctrls;
1649 struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls);
1650 struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
1651 struct uvc_control_mapping *mend =
1652 mapping + ARRAY_SIZE(uvc_ctrl_mappings);
1653
1654 for (; ctrl < cend; ++ctrl)
1655 uvc_ctrl_add_info(ctrl);
1656
1657 for (; mapping < mend; ++mapping)
1658 uvc_ctrl_add_mapping(mapping);
1659 }
Tomato firmware and modifications.