2 * uvc_ctrl.c -- USB Video Class driver - Controls
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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.
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 <linux/atomic.h>
24 #include <media/v4l2-ctrls.h>
28 #define UVC_CTRL_DATA_CURRENT 0
29 #define UVC_CTRL_DATA_BACKUP 1
30 #define UVC_CTRL_DATA_MIN 2
31 #define UVC_CTRL_DATA_MAX 3
32 #define UVC_CTRL_DATA_RES 4
33 #define UVC_CTRL_DATA_DEF 5
34 #define UVC_CTRL_DATA_LAST 6
36 /* ------------------------------------------------------------------------
40 static struct uvc_control_info uvc_ctrls
[] = {
42 .entity
= UVC_GUID_UVC_PROCESSING
,
43 .selector
= UVC_PU_BRIGHTNESS_CONTROL
,
46 .flags
= UVC_CTRL_FLAG_SET_CUR
47 | UVC_CTRL_FLAG_GET_RANGE
48 | UVC_CTRL_FLAG_RESTORE
,
51 .entity
= UVC_GUID_UVC_PROCESSING
,
52 .selector
= UVC_PU_CONTRAST_CONTROL
,
55 .flags
= UVC_CTRL_FLAG_SET_CUR
56 | UVC_CTRL_FLAG_GET_RANGE
57 | UVC_CTRL_FLAG_RESTORE
,
60 .entity
= UVC_GUID_UVC_PROCESSING
,
61 .selector
= UVC_PU_HUE_CONTROL
,
64 .flags
= UVC_CTRL_FLAG_SET_CUR
65 | UVC_CTRL_FLAG_GET_RANGE
66 | UVC_CTRL_FLAG_RESTORE
67 | UVC_CTRL_FLAG_AUTO_UPDATE
,
70 .entity
= UVC_GUID_UVC_PROCESSING
,
71 .selector
= UVC_PU_SATURATION_CONTROL
,
74 .flags
= UVC_CTRL_FLAG_SET_CUR
75 | UVC_CTRL_FLAG_GET_RANGE
76 | UVC_CTRL_FLAG_RESTORE
,
79 .entity
= UVC_GUID_UVC_PROCESSING
,
80 .selector
= UVC_PU_SHARPNESS_CONTROL
,
83 .flags
= UVC_CTRL_FLAG_SET_CUR
84 | UVC_CTRL_FLAG_GET_RANGE
85 | UVC_CTRL_FLAG_RESTORE
,
88 .entity
= UVC_GUID_UVC_PROCESSING
,
89 .selector
= UVC_PU_GAMMA_CONTROL
,
92 .flags
= UVC_CTRL_FLAG_SET_CUR
93 | UVC_CTRL_FLAG_GET_RANGE
94 | UVC_CTRL_FLAG_RESTORE
,
97 .entity
= UVC_GUID_UVC_PROCESSING
,
98 .selector
= UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL
,
101 .flags
= UVC_CTRL_FLAG_SET_CUR
102 | UVC_CTRL_FLAG_GET_RANGE
103 | UVC_CTRL_FLAG_RESTORE
104 | UVC_CTRL_FLAG_AUTO_UPDATE
,
107 .entity
= UVC_GUID_UVC_PROCESSING
,
108 .selector
= UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL
,
111 .flags
= UVC_CTRL_FLAG_SET_CUR
112 | UVC_CTRL_FLAG_GET_RANGE
113 | UVC_CTRL_FLAG_RESTORE
114 | UVC_CTRL_FLAG_AUTO_UPDATE
,
117 .entity
= UVC_GUID_UVC_PROCESSING
,
118 .selector
= UVC_PU_BACKLIGHT_COMPENSATION_CONTROL
,
121 .flags
= UVC_CTRL_FLAG_SET_CUR
122 | UVC_CTRL_FLAG_GET_RANGE
123 | UVC_CTRL_FLAG_RESTORE
,
126 .entity
= UVC_GUID_UVC_PROCESSING
,
127 .selector
= UVC_PU_GAIN_CONTROL
,
130 .flags
= UVC_CTRL_FLAG_SET_CUR
131 | UVC_CTRL_FLAG_GET_RANGE
132 | UVC_CTRL_FLAG_RESTORE
,
135 .entity
= UVC_GUID_UVC_PROCESSING
,
136 .selector
= UVC_PU_POWER_LINE_FREQUENCY_CONTROL
,
139 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
140 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_RESTORE
,
143 .entity
= UVC_GUID_UVC_PROCESSING
,
144 .selector
= UVC_PU_HUE_AUTO_CONTROL
,
147 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
148 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_RESTORE
,
151 .entity
= UVC_GUID_UVC_PROCESSING
,
152 .selector
= UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL
,
155 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
156 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_RESTORE
,
159 .entity
= UVC_GUID_UVC_PROCESSING
,
160 .selector
= UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL
,
163 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
164 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_RESTORE
,
167 .entity
= UVC_GUID_UVC_PROCESSING
,
168 .selector
= UVC_PU_DIGITAL_MULTIPLIER_CONTROL
,
171 .flags
= UVC_CTRL_FLAG_SET_CUR
172 | UVC_CTRL_FLAG_GET_RANGE
173 | UVC_CTRL_FLAG_RESTORE
,
176 .entity
= UVC_GUID_UVC_PROCESSING
,
177 .selector
= UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL
,
180 .flags
= UVC_CTRL_FLAG_SET_CUR
181 | UVC_CTRL_FLAG_GET_RANGE
182 | UVC_CTRL_FLAG_RESTORE
,
185 .entity
= UVC_GUID_UVC_PROCESSING
,
186 .selector
= UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL
,
189 .flags
= UVC_CTRL_FLAG_GET_CUR
,
192 .entity
= UVC_GUID_UVC_PROCESSING
,
193 .selector
= UVC_PU_ANALOG_LOCK_STATUS_CONTROL
,
196 .flags
= UVC_CTRL_FLAG_GET_CUR
,
199 .entity
= UVC_GUID_UVC_CAMERA
,
200 .selector
= UVC_CT_SCANNING_MODE_CONTROL
,
203 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
204 | UVC_CTRL_FLAG_RESTORE
,
207 .entity
= UVC_GUID_UVC_CAMERA
,
208 .selector
= UVC_CT_AE_MODE_CONTROL
,
211 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
212 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_GET_RES
213 | UVC_CTRL_FLAG_RESTORE
,
216 .entity
= UVC_GUID_UVC_CAMERA
,
217 .selector
= UVC_CT_AE_PRIORITY_CONTROL
,
220 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
221 | UVC_CTRL_FLAG_RESTORE
,
224 .entity
= UVC_GUID_UVC_CAMERA
,
225 .selector
= UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL
,
228 .flags
= UVC_CTRL_FLAG_SET_CUR
229 | UVC_CTRL_FLAG_GET_RANGE
230 | UVC_CTRL_FLAG_RESTORE
,
233 .entity
= UVC_GUID_UVC_CAMERA
,
234 .selector
= UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL
,
237 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_RESTORE
,
240 .entity
= UVC_GUID_UVC_CAMERA
,
241 .selector
= UVC_CT_FOCUS_ABSOLUTE_CONTROL
,
244 .flags
= UVC_CTRL_FLAG_SET_CUR
245 | UVC_CTRL_FLAG_GET_RANGE
246 | UVC_CTRL_FLAG_RESTORE
247 | UVC_CTRL_FLAG_AUTO_UPDATE
,
250 .entity
= UVC_GUID_UVC_CAMERA
,
251 .selector
= UVC_CT_FOCUS_RELATIVE_CONTROL
,
254 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_MIN
255 | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_RES
256 | UVC_CTRL_FLAG_GET_DEF
257 | UVC_CTRL_FLAG_AUTO_UPDATE
,
260 .entity
= UVC_GUID_UVC_CAMERA
,
261 .selector
= UVC_CT_IRIS_ABSOLUTE_CONTROL
,
264 .flags
= UVC_CTRL_FLAG_SET_CUR
265 | UVC_CTRL_FLAG_GET_RANGE
266 | UVC_CTRL_FLAG_RESTORE
267 | UVC_CTRL_FLAG_AUTO_UPDATE
,
270 .entity
= UVC_GUID_UVC_CAMERA
,
271 .selector
= UVC_CT_IRIS_RELATIVE_CONTROL
,
274 .flags
= UVC_CTRL_FLAG_SET_CUR
275 | UVC_CTRL_FLAG_AUTO_UPDATE
,
278 .entity
= UVC_GUID_UVC_CAMERA
,
279 .selector
= UVC_CT_ZOOM_ABSOLUTE_CONTROL
,
282 .flags
= UVC_CTRL_FLAG_SET_CUR
283 | UVC_CTRL_FLAG_GET_RANGE
284 | UVC_CTRL_FLAG_RESTORE
285 | UVC_CTRL_FLAG_AUTO_UPDATE
,
288 .entity
= UVC_GUID_UVC_CAMERA
,
289 .selector
= UVC_CT_ZOOM_RELATIVE_CONTROL
,
292 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_MIN
293 | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_RES
294 | UVC_CTRL_FLAG_GET_DEF
295 | UVC_CTRL_FLAG_AUTO_UPDATE
,
298 .entity
= UVC_GUID_UVC_CAMERA
,
299 .selector
= UVC_CT_PANTILT_ABSOLUTE_CONTROL
,
302 .flags
= UVC_CTRL_FLAG_SET_CUR
303 | UVC_CTRL_FLAG_GET_RANGE
304 | UVC_CTRL_FLAG_RESTORE
305 | UVC_CTRL_FLAG_AUTO_UPDATE
,
308 .entity
= UVC_GUID_UVC_CAMERA
,
309 .selector
= UVC_CT_PANTILT_RELATIVE_CONTROL
,
312 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_MIN
313 | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_RES
314 | UVC_CTRL_FLAG_GET_DEF
315 | UVC_CTRL_FLAG_AUTO_UPDATE
,
318 .entity
= UVC_GUID_UVC_CAMERA
,
319 .selector
= UVC_CT_ROLL_ABSOLUTE_CONTROL
,
322 .flags
= UVC_CTRL_FLAG_SET_CUR
323 | UVC_CTRL_FLAG_GET_RANGE
324 | UVC_CTRL_FLAG_RESTORE
325 | UVC_CTRL_FLAG_AUTO_UPDATE
,
328 .entity
= UVC_GUID_UVC_CAMERA
,
329 .selector
= UVC_CT_ROLL_RELATIVE_CONTROL
,
332 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_MIN
333 | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_RES
334 | UVC_CTRL_FLAG_GET_DEF
335 | UVC_CTRL_FLAG_AUTO_UPDATE
,
338 .entity
= UVC_GUID_UVC_CAMERA
,
339 .selector
= UVC_CT_FOCUS_AUTO_CONTROL
,
342 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
343 | UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_RESTORE
,
346 .entity
= UVC_GUID_UVC_CAMERA
,
347 .selector
= UVC_CT_PRIVACY_CONTROL
,
350 .flags
= UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_CUR
351 | UVC_CTRL_FLAG_RESTORE
352 | UVC_CTRL_FLAG_AUTO_UPDATE
,
356 static struct uvc_menu_info power_line_frequency_controls
[] = {
362 static struct uvc_menu_info exposure_auto_controls
[] = {
364 { 1, "Manual Mode" },
365 { 4, "Shutter Priority Mode" },
366 { 8, "Aperture Priority Mode" },
369 static __s32
uvc_ctrl_get_zoom(struct uvc_control_mapping
*mapping
,
370 __u8 query
, const __u8
*data
)
372 __s8 zoom
= (__s8
)data
[0];
376 return (zoom
== 0) ? 0 : (zoom
> 0 ? data
[2] : -data
[2]);
387 static void uvc_ctrl_set_zoom(struct uvc_control_mapping
*mapping
,
388 __s32 value
, __u8
*data
)
390 data
[0] = value
== 0 ? 0 : (value
> 0) ? 1 : 0xff;
391 data
[2] = min((int)abs(value
), 0xff);
394 static struct uvc_control_mapping uvc_ctrl_mappings
[] = {
396 .id
= V4L2_CID_BRIGHTNESS
,
397 .name
= "Brightness",
398 .entity
= UVC_GUID_UVC_PROCESSING
,
399 .selector
= UVC_PU_BRIGHTNESS_CONTROL
,
402 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
403 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
406 .id
= V4L2_CID_CONTRAST
,
408 .entity
= UVC_GUID_UVC_PROCESSING
,
409 .selector
= UVC_PU_CONTRAST_CONTROL
,
412 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
413 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
418 .entity
= UVC_GUID_UVC_PROCESSING
,
419 .selector
= UVC_PU_HUE_CONTROL
,
422 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
423 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
424 .master_id
= V4L2_CID_HUE_AUTO
,
428 .id
= V4L2_CID_SATURATION
,
429 .name
= "Saturation",
430 .entity
= UVC_GUID_UVC_PROCESSING
,
431 .selector
= UVC_PU_SATURATION_CONTROL
,
434 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
435 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
438 .id
= V4L2_CID_SHARPNESS
,
440 .entity
= UVC_GUID_UVC_PROCESSING
,
441 .selector
= UVC_PU_SHARPNESS_CONTROL
,
444 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
445 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
448 .id
= V4L2_CID_GAMMA
,
450 .entity
= UVC_GUID_UVC_PROCESSING
,
451 .selector
= UVC_PU_GAMMA_CONTROL
,
454 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
455 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
458 .id
= V4L2_CID_BACKLIGHT_COMPENSATION
,
459 .name
= "Backlight Compensation",
460 .entity
= UVC_GUID_UVC_PROCESSING
,
461 .selector
= UVC_PU_BACKLIGHT_COMPENSATION_CONTROL
,
464 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
465 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
470 .entity
= UVC_GUID_UVC_PROCESSING
,
471 .selector
= UVC_PU_GAIN_CONTROL
,
474 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
475 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
478 .id
= V4L2_CID_POWER_LINE_FREQUENCY
,
479 .name
= "Power Line Frequency",
480 .entity
= UVC_GUID_UVC_PROCESSING
,
481 .selector
= UVC_PU_POWER_LINE_FREQUENCY_CONTROL
,
484 .v4l2_type
= V4L2_CTRL_TYPE_MENU
,
485 .data_type
= UVC_CTRL_DATA_TYPE_ENUM
,
486 .menu_info
= power_line_frequency_controls
,
487 .menu_count
= ARRAY_SIZE(power_line_frequency_controls
),
490 .id
= V4L2_CID_HUE_AUTO
,
492 .entity
= UVC_GUID_UVC_PROCESSING
,
493 .selector
= UVC_PU_HUE_AUTO_CONTROL
,
496 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
497 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
498 .slave_ids
= { V4L2_CID_HUE
, },
501 .id
= V4L2_CID_EXPOSURE_AUTO
,
502 .name
= "Exposure, Auto",
503 .entity
= UVC_GUID_UVC_CAMERA
,
504 .selector
= UVC_CT_AE_MODE_CONTROL
,
507 .v4l2_type
= V4L2_CTRL_TYPE_MENU
,
508 .data_type
= UVC_CTRL_DATA_TYPE_BITMASK
,
509 .menu_info
= exposure_auto_controls
,
510 .menu_count
= ARRAY_SIZE(exposure_auto_controls
),
511 .slave_ids
= { V4L2_CID_EXPOSURE_ABSOLUTE
, },
514 .id
= V4L2_CID_EXPOSURE_AUTO_PRIORITY
,
515 .name
= "Exposure, Auto Priority",
516 .entity
= UVC_GUID_UVC_CAMERA
,
517 .selector
= UVC_CT_AE_PRIORITY_CONTROL
,
520 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
521 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
524 .id
= V4L2_CID_EXPOSURE_ABSOLUTE
,
525 .name
= "Exposure (Absolute)",
526 .entity
= UVC_GUID_UVC_CAMERA
,
527 .selector
= UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL
,
530 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
531 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
532 .master_id
= V4L2_CID_EXPOSURE_AUTO
,
533 .master_manual
= V4L2_EXPOSURE_MANUAL
,
536 .id
= V4L2_CID_AUTO_WHITE_BALANCE
,
537 .name
= "White Balance Temperature, Auto",
538 .entity
= UVC_GUID_UVC_PROCESSING
,
539 .selector
= UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL
,
542 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
543 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
544 .slave_ids
= { V4L2_CID_WHITE_BALANCE_TEMPERATURE
, },
547 .id
= V4L2_CID_WHITE_BALANCE_TEMPERATURE
,
548 .name
= "White Balance Temperature",
549 .entity
= UVC_GUID_UVC_PROCESSING
,
550 .selector
= UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL
,
553 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
554 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
555 .master_id
= V4L2_CID_AUTO_WHITE_BALANCE
,
559 .id
= V4L2_CID_AUTO_WHITE_BALANCE
,
560 .name
= "White Balance Component, Auto",
561 .entity
= UVC_GUID_UVC_PROCESSING
,
562 .selector
= UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL
,
565 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
566 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
567 .slave_ids
= { V4L2_CID_BLUE_BALANCE
,
568 V4L2_CID_RED_BALANCE
},
571 .id
= V4L2_CID_BLUE_BALANCE
,
572 .name
= "White Balance Blue Component",
573 .entity
= UVC_GUID_UVC_PROCESSING
,
574 .selector
= UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL
,
577 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
578 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
579 .master_id
= V4L2_CID_AUTO_WHITE_BALANCE
,
583 .id
= V4L2_CID_RED_BALANCE
,
584 .name
= "White Balance Red Component",
585 .entity
= UVC_GUID_UVC_PROCESSING
,
586 .selector
= UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL
,
589 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
590 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
591 .master_id
= V4L2_CID_AUTO_WHITE_BALANCE
,
595 .id
= V4L2_CID_FOCUS_ABSOLUTE
,
596 .name
= "Focus (absolute)",
597 .entity
= UVC_GUID_UVC_CAMERA
,
598 .selector
= UVC_CT_FOCUS_ABSOLUTE_CONTROL
,
601 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
602 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
603 .master_id
= V4L2_CID_FOCUS_AUTO
,
607 .id
= V4L2_CID_FOCUS_AUTO
,
608 .name
= "Focus, Auto",
609 .entity
= UVC_GUID_UVC_CAMERA
,
610 .selector
= UVC_CT_FOCUS_AUTO_CONTROL
,
613 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
614 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
615 .slave_ids
= { V4L2_CID_FOCUS_ABSOLUTE
, },
618 .id
= V4L2_CID_IRIS_ABSOLUTE
,
619 .name
= "Iris, Absolute",
620 .entity
= UVC_GUID_UVC_CAMERA
,
621 .selector
= UVC_CT_IRIS_ABSOLUTE_CONTROL
,
624 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
625 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
628 .id
= V4L2_CID_IRIS_RELATIVE
,
629 .name
= "Iris, Relative",
630 .entity
= UVC_GUID_UVC_CAMERA
,
631 .selector
= UVC_CT_IRIS_RELATIVE_CONTROL
,
634 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
635 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
638 .id
= V4L2_CID_ZOOM_ABSOLUTE
,
639 .name
= "Zoom, Absolute",
640 .entity
= UVC_GUID_UVC_CAMERA
,
641 .selector
= UVC_CT_ZOOM_ABSOLUTE_CONTROL
,
644 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
645 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
648 .id
= V4L2_CID_ZOOM_CONTINUOUS
,
649 .name
= "Zoom, Continuous",
650 .entity
= UVC_GUID_UVC_CAMERA
,
651 .selector
= UVC_CT_ZOOM_RELATIVE_CONTROL
,
654 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
655 .data_type
= UVC_CTRL_DATA_TYPE_SIGNED
,
656 .get
= uvc_ctrl_get_zoom
,
657 .set
= uvc_ctrl_set_zoom
,
660 .id
= V4L2_CID_PAN_ABSOLUTE
,
661 .name
= "Pan (Absolute)",
662 .entity
= UVC_GUID_UVC_CAMERA
,
663 .selector
= UVC_CT_PANTILT_ABSOLUTE_CONTROL
,
666 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
667 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
670 .id
= V4L2_CID_TILT_ABSOLUTE
,
671 .name
= "Tilt (Absolute)",
672 .entity
= UVC_GUID_UVC_CAMERA
,
673 .selector
= UVC_CT_PANTILT_ABSOLUTE_CONTROL
,
676 .v4l2_type
= V4L2_CTRL_TYPE_INTEGER
,
677 .data_type
= UVC_CTRL_DATA_TYPE_UNSIGNED
,
680 .id
= V4L2_CID_PRIVACY
,
682 .entity
= UVC_GUID_UVC_CAMERA
,
683 .selector
= UVC_CT_PRIVACY_CONTROL
,
686 .v4l2_type
= V4L2_CTRL_TYPE_BOOLEAN
,
687 .data_type
= UVC_CTRL_DATA_TYPE_BOOLEAN
,
691 /* ------------------------------------------------------------------------
695 static inline __u8
*uvc_ctrl_data(struct uvc_control
*ctrl
, int id
)
697 return ctrl
->uvc_data
+ id
* ctrl
->info
.size
;
700 static inline int uvc_test_bit(const __u8
*data
, int bit
)
702 return (data
[bit
>> 3] >> (bit
& 7)) & 1;
705 static inline void uvc_clear_bit(__u8
*data
, int bit
)
707 data
[bit
>> 3] &= ~(1 << (bit
& 7));
710 /* Extract the bit string specified by mapping->offset and mapping->size
711 * from the little-endian data stored at 'data' and return the result as
712 * a signed 32bit integer. Sign extension will be performed if the mapping
713 * references a signed data type.
715 static __s32
uvc_get_le_value(struct uvc_control_mapping
*mapping
,
716 __u8 query
, const __u8
*data
)
718 int bits
= mapping
->size
;
719 int offset
= mapping
->offset
;
725 mask
= ((1LL << bits
) - 1) << offset
;
727 for (; bits
> 0; data
++) {
728 __u8 byte
= *data
& mask
;
729 value
|= offset
> 0 ? (byte
>> offset
) : (byte
<< (-offset
));
730 bits
-= 8 - (offset
> 0 ? offset
: 0);
732 mask
= (1 << bits
) - 1;
735 /* Sign-extend the value if needed. */
736 if (mapping
->data_type
== UVC_CTRL_DATA_TYPE_SIGNED
)
737 value
|= -(value
& (1 << (mapping
->size
- 1)));
742 /* Set the bit string specified by mapping->offset and mapping->size
743 * in the little-endian data stored at 'data' to the value 'value'.
745 static void uvc_set_le_value(struct uvc_control_mapping
*mapping
,
746 __s32 value
, __u8
*data
)
748 int bits
= mapping
->size
;
749 int offset
= mapping
->offset
;
752 /* According to the v4l2 spec, writing any value to a button control
753 * should result in the action belonging to the button control being
754 * triggered. UVC devices however want to see a 1 written -> override
757 if (mapping
->v4l2_type
== V4L2_CTRL_TYPE_BUTTON
)
763 for (; bits
> 0; data
++) {
764 mask
= ((1LL << bits
) - 1) << offset
;
765 *data
= (*data
& ~mask
) | ((value
<< offset
) & mask
);
766 value
>>= offset
? offset
: 8;
772 /* ------------------------------------------------------------------------
773 * Terminal and unit management
776 static const __u8 uvc_processing_guid
[16] = UVC_GUID_UVC_PROCESSING
;
777 static const __u8 uvc_camera_guid
[16] = UVC_GUID_UVC_CAMERA
;
778 static const __u8 uvc_media_transport_input_guid
[16] =
779 UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT
;
781 static int uvc_entity_match_guid(const struct uvc_entity
*entity
,
784 switch (UVC_ENTITY_TYPE(entity
)) {
786 return memcmp(uvc_camera_guid
, guid
, 16) == 0;
788 case UVC_ITT_MEDIA_TRANSPORT_INPUT
:
789 return memcmp(uvc_media_transport_input_guid
, guid
, 16) == 0;
791 case UVC_VC_PROCESSING_UNIT
:
792 return memcmp(uvc_processing_guid
, guid
, 16) == 0;
794 case UVC_VC_EXTENSION_UNIT
:
795 return memcmp(entity
->extension
.guidExtensionCode
,
803 /* ------------------------------------------------------------------------
807 static void __uvc_find_control(struct uvc_entity
*entity
, __u32 v4l2_id
,
808 struct uvc_control_mapping
**mapping
, struct uvc_control
**control
,
811 struct uvc_control
*ctrl
;
812 struct uvc_control_mapping
*map
;
818 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
819 ctrl
= &entity
->controls
[i
];
820 if (!ctrl
->initialized
)
823 list_for_each_entry(map
, &ctrl
->info
.mappings
, list
) {
824 if ((map
->id
== v4l2_id
) && !next
) {
830 if ((*mapping
== NULL
|| (*mapping
)->id
> map
->id
) &&
831 (map
->id
> v4l2_id
) && next
) {
839 static struct uvc_control
*uvc_find_control(struct uvc_video_chain
*chain
,
840 __u32 v4l2_id
, struct uvc_control_mapping
**mapping
)
842 struct uvc_control
*ctrl
= NULL
;
843 struct uvc_entity
*entity
;
844 int next
= v4l2_id
& V4L2_CTRL_FLAG_NEXT_CTRL
;
848 /* Mask the query flags. */
849 v4l2_id
&= V4L2_CTRL_ID_MASK
;
851 /* Find the control. */
852 list_for_each_entry(entity
, &chain
->entities
, chain
) {
853 __uvc_find_control(entity
, v4l2_id
, mapping
, &ctrl
, next
);
858 if (ctrl
== NULL
&& !next
)
859 uvc_trace(UVC_TRACE_CONTROL
, "Control 0x%08x not found.\n",
865 static int uvc_ctrl_populate_cache(struct uvc_video_chain
*chain
,
866 struct uvc_control
*ctrl
)
870 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_DEF
) {
871 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_DEF
, ctrl
->entity
->id
,
872 chain
->dev
->intfnum
, ctrl
->info
.selector
,
873 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_DEF
),
879 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_MIN
) {
880 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_MIN
, ctrl
->entity
->id
,
881 chain
->dev
->intfnum
, ctrl
->info
.selector
,
882 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MIN
),
887 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_MAX
) {
888 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_MAX
, ctrl
->entity
->id
,
889 chain
->dev
->intfnum
, ctrl
->info
.selector
,
890 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MAX
),
895 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_RES
) {
896 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_RES
, ctrl
->entity
->id
,
897 chain
->dev
->intfnum
, ctrl
->info
.selector
,
898 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
),
901 if (UVC_ENTITY_TYPE(ctrl
->entity
) !=
902 UVC_VC_EXTENSION_UNIT
)
905 /* GET_RES is mandatory for XU controls, but some
906 * cameras still choke on it. Ignore errors and set the
907 * resolution value to zero.
909 uvc_warn_once(chain
->dev
, UVC_WARN_XU_GET_RES
,
910 "UVC non compliance - GET_RES failed on "
911 "an XU control. Enabling workaround.\n");
912 memset(uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
), 0,
921 static int __uvc_ctrl_get(struct uvc_video_chain
*chain
,
922 struct uvc_control
*ctrl
, struct uvc_control_mapping
*mapping
,
925 struct uvc_menu_info
*menu
;
929 if ((ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_CUR
) == 0)
933 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_CUR
, ctrl
->entity
->id
,
934 chain
->dev
->intfnum
, ctrl
->info
.selector
,
935 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
943 *value
= mapping
->get(mapping
, UVC_GET_CUR
,
944 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
));
946 if (mapping
->v4l2_type
== V4L2_CTRL_TYPE_MENU
) {
947 menu
= mapping
->menu_info
;
948 for (i
= 0; i
< mapping
->menu_count
; ++i
, ++menu
) {
949 if (menu
->value
== *value
) {
959 static int __uvc_query_v4l2_ctrl(struct uvc_video_chain
*chain
,
960 struct uvc_control
*ctrl
,
961 struct uvc_control_mapping
*mapping
,
962 struct v4l2_queryctrl
*v4l2_ctrl
)
964 struct uvc_control_mapping
*master_map
= NULL
;
965 struct uvc_control
*master_ctrl
= NULL
;
966 struct uvc_menu_info
*menu
;
969 memset(v4l2_ctrl
, 0, sizeof *v4l2_ctrl
);
970 v4l2_ctrl
->id
= mapping
->id
;
971 v4l2_ctrl
->type
= mapping
->v4l2_type
;
972 strlcpy(v4l2_ctrl
->name
, mapping
->name
, sizeof v4l2_ctrl
->name
);
973 v4l2_ctrl
->flags
= 0;
975 if (!(ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_CUR
))
976 v4l2_ctrl
->flags
|= V4L2_CTRL_FLAG_WRITE_ONLY
;
977 if (!(ctrl
->info
.flags
& UVC_CTRL_FLAG_SET_CUR
))
978 v4l2_ctrl
->flags
|= V4L2_CTRL_FLAG_READ_ONLY
;
980 if (mapping
->master_id
)
981 __uvc_find_control(ctrl
->entity
, mapping
->master_id
,
982 &master_map
, &master_ctrl
, 0);
983 if (master_ctrl
&& (master_ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_CUR
)) {
985 int ret
= __uvc_ctrl_get(chain
, master_ctrl
, master_map
, &val
);
989 if (val
!= mapping
->master_manual
)
990 v4l2_ctrl
->flags
|= V4L2_CTRL_FLAG_INACTIVE
;
994 int ret
= uvc_ctrl_populate_cache(chain
, ctrl
);
999 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_DEF
) {
1000 v4l2_ctrl
->default_value
= mapping
->get(mapping
, UVC_GET_DEF
,
1001 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_DEF
));
1004 switch (mapping
->v4l2_type
) {
1005 case V4L2_CTRL_TYPE_MENU
:
1006 v4l2_ctrl
->minimum
= 0;
1007 v4l2_ctrl
->maximum
= mapping
->menu_count
- 1;
1008 v4l2_ctrl
->step
= 1;
1010 menu
= mapping
->menu_info
;
1011 for (i
= 0; i
< mapping
->menu_count
; ++i
, ++menu
) {
1012 if (menu
->value
== v4l2_ctrl
->default_value
) {
1013 v4l2_ctrl
->default_value
= i
;
1020 case V4L2_CTRL_TYPE_BOOLEAN
:
1021 v4l2_ctrl
->minimum
= 0;
1022 v4l2_ctrl
->maximum
= 1;
1023 v4l2_ctrl
->step
= 1;
1026 case V4L2_CTRL_TYPE_BUTTON
:
1027 v4l2_ctrl
->minimum
= 0;
1028 v4l2_ctrl
->maximum
= 0;
1029 v4l2_ctrl
->step
= 0;
1036 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_MIN
)
1037 v4l2_ctrl
->minimum
= mapping
->get(mapping
, UVC_GET_MIN
,
1038 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MIN
));
1040 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_MAX
)
1041 v4l2_ctrl
->maximum
= mapping
->get(mapping
, UVC_GET_MAX
,
1042 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MAX
));
1044 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_RES
)
1045 v4l2_ctrl
->step
= mapping
->get(mapping
, UVC_GET_RES
,
1046 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
));
1051 int uvc_query_v4l2_ctrl(struct uvc_video_chain
*chain
,
1052 struct v4l2_queryctrl
*v4l2_ctrl
)
1054 struct uvc_control
*ctrl
;
1055 struct uvc_control_mapping
*mapping
;
1058 ret
= mutex_lock_interruptible(&chain
->ctrl_mutex
);
1060 return -ERESTARTSYS
;
1062 ctrl
= uvc_find_control(chain
, v4l2_ctrl
->id
, &mapping
);
1068 ret
= __uvc_query_v4l2_ctrl(chain
, ctrl
, mapping
, v4l2_ctrl
);
1070 mutex_unlock(&chain
->ctrl_mutex
);
1075 * Mapping V4L2 controls to UVC controls can be straighforward if done well.
1076 * Most of the UVC controls exist in V4L2, and can be mapped directly. Some
1077 * must be grouped (for instance the Red Balance, Blue Balance and Do White
1078 * Balance V4L2 controls use the White Balance Component UVC control) or
1079 * otherwise translated. The approach we take here is to use a translation
1080 * table for the controls that can be mapped directly, and handle the others
1083 int uvc_query_v4l2_menu(struct uvc_video_chain
*chain
,
1084 struct v4l2_querymenu
*query_menu
)
1086 struct uvc_menu_info
*menu_info
;
1087 struct uvc_control_mapping
*mapping
;
1088 struct uvc_control
*ctrl
;
1089 u32 index
= query_menu
->index
;
1090 u32 id
= query_menu
->id
;
1093 memset(query_menu
, 0, sizeof(*query_menu
));
1094 query_menu
->id
= id
;
1095 query_menu
->index
= index
;
1097 ret
= mutex_lock_interruptible(&chain
->ctrl_mutex
);
1099 return -ERESTARTSYS
;
1101 ctrl
= uvc_find_control(chain
, query_menu
->id
, &mapping
);
1107 if (mapping
->v4l2_type
!= V4L2_CTRL_TYPE_MENU
||
1108 query_menu
->index
>= mapping
->menu_count
) {
1113 menu_info
= &mapping
->menu_info
[query_menu
->index
];
1115 if (mapping
->data_type
== UVC_CTRL_DATA_TYPE_BITMASK
&&
1116 (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_RES
)) {
1119 if (!ctrl
->cached
) {
1120 ret
= uvc_ctrl_populate_cache(chain
, ctrl
);
1125 bitmap
= mapping
->get(mapping
, UVC_GET_RES
,
1126 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
));
1127 if (!(bitmap
& menu_info
->value
)) {
1133 strlcpy(query_menu
->name
, menu_info
->name
, sizeof query_menu
->name
);
1136 mutex_unlock(&chain
->ctrl_mutex
);
1140 /* --------------------------------------------------------------------------
1141 * Ctrl event handling
1144 static void uvc_ctrl_fill_event(struct uvc_video_chain
*chain
,
1145 struct v4l2_event
*ev
,
1146 struct uvc_control
*ctrl
,
1147 struct uvc_control_mapping
*mapping
,
1148 s32 value
, u32 changes
)
1150 struct v4l2_queryctrl v4l2_ctrl
;
1152 __uvc_query_v4l2_ctrl(chain
, ctrl
, mapping
, &v4l2_ctrl
);
1154 memset(ev
->reserved
, 0, sizeof(ev
->reserved
));
1155 ev
->type
= V4L2_EVENT_CTRL
;
1156 ev
->id
= v4l2_ctrl
.id
;
1157 ev
->u
.ctrl
.value
= value
;
1158 ev
->u
.ctrl
.changes
= changes
;
1159 ev
->u
.ctrl
.type
= v4l2_ctrl
.type
;
1160 ev
->u
.ctrl
.flags
= v4l2_ctrl
.flags
;
1161 ev
->u
.ctrl
.minimum
= v4l2_ctrl
.minimum
;
1162 ev
->u
.ctrl
.maximum
= v4l2_ctrl
.maximum
;
1163 ev
->u
.ctrl
.step
= v4l2_ctrl
.step
;
1164 ev
->u
.ctrl
.default_value
= v4l2_ctrl
.default_value
;
1167 static void uvc_ctrl_send_event(struct uvc_fh
*handle
,
1168 struct uvc_control
*ctrl
, struct uvc_control_mapping
*mapping
,
1169 s32 value
, u32 changes
)
1171 struct v4l2_subscribed_event
*sev
;
1172 struct v4l2_event ev
;
1174 if (list_empty(&mapping
->ev_subs
))
1177 uvc_ctrl_fill_event(handle
->chain
, &ev
, ctrl
, mapping
, value
, changes
);
1179 list_for_each_entry(sev
, &mapping
->ev_subs
, node
) {
1180 if (sev
->fh
&& (sev
->fh
!= &handle
->vfh
||
1181 (sev
->flags
& V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK
) ||
1182 (changes
& V4L2_EVENT_CTRL_CH_FLAGS
)))
1183 v4l2_event_queue_fh(sev
->fh
, &ev
);
1187 static void uvc_ctrl_send_slave_event(struct uvc_fh
*handle
,
1188 struct uvc_control
*master
, u32 slave_id
,
1189 const struct v4l2_ext_control
*xctrls
, unsigned int xctrls_count
)
1191 struct uvc_control_mapping
*mapping
= NULL
;
1192 struct uvc_control
*ctrl
= NULL
;
1193 u32 changes
= V4L2_EVENT_CTRL_CH_FLAGS
;
1198 * We can skip sending an event for the slave if the slave
1199 * is being modified in the same transaction.
1201 for (i
= 0; i
< xctrls_count
; i
++) {
1202 if (xctrls
[i
].id
== slave_id
)
1206 __uvc_find_control(master
->entity
, slave_id
, &mapping
, &ctrl
, 0);
1210 if (__uvc_ctrl_get(handle
->chain
, ctrl
, mapping
, &val
) == 0)
1211 changes
|= V4L2_EVENT_CTRL_CH_VALUE
;
1213 uvc_ctrl_send_event(handle
, ctrl
, mapping
, val
, changes
);
1216 static void uvc_ctrl_send_events(struct uvc_fh
*handle
,
1217 const struct v4l2_ext_control
*xctrls
, unsigned int xctrls_count
)
1219 struct uvc_control_mapping
*mapping
;
1220 struct uvc_control
*ctrl
;
1221 u32 changes
= V4L2_EVENT_CTRL_CH_VALUE
;
1225 for (i
= 0; i
< xctrls_count
; ++i
) {
1226 ctrl
= uvc_find_control(handle
->chain
, xctrls
[i
].id
, &mapping
);
1228 for (j
= 0; j
< ARRAY_SIZE(mapping
->slave_ids
); ++j
) {
1229 if (!mapping
->slave_ids
[j
])
1231 uvc_ctrl_send_slave_event(handle
, ctrl
,
1232 mapping
->slave_ids
[j
],
1233 xctrls
, xctrls_count
);
1237 * If the master is being modified in the same transaction
1238 * flags may change too.
1240 if (mapping
->master_id
) {
1241 for (j
= 0; j
< xctrls_count
; j
++) {
1242 if (xctrls
[j
].id
== mapping
->master_id
) {
1243 changes
|= V4L2_EVENT_CTRL_CH_FLAGS
;
1249 uvc_ctrl_send_event(handle
, ctrl
, mapping
, xctrls
[i
].value
,
1254 static int uvc_ctrl_add_event(struct v4l2_subscribed_event
*sev
, unsigned elems
)
1256 struct uvc_fh
*handle
= container_of(sev
->fh
, struct uvc_fh
, vfh
);
1257 struct uvc_control_mapping
*mapping
;
1258 struct uvc_control
*ctrl
;
1261 ret
= mutex_lock_interruptible(&handle
->chain
->ctrl_mutex
);
1263 return -ERESTARTSYS
;
1265 ctrl
= uvc_find_control(handle
->chain
, sev
->id
, &mapping
);
1271 list_add_tail(&sev
->node
, &mapping
->ev_subs
);
1272 if (sev
->flags
& V4L2_EVENT_SUB_FL_SEND_INITIAL
) {
1273 struct v4l2_event ev
;
1274 u32 changes
= V4L2_EVENT_CTRL_CH_FLAGS
;
1277 if (__uvc_ctrl_get(handle
->chain
, ctrl
, mapping
, &val
) == 0)
1278 changes
|= V4L2_EVENT_CTRL_CH_VALUE
;
1280 uvc_ctrl_fill_event(handle
->chain
, &ev
, ctrl
, mapping
, val
,
1282 /* Mark the queue as active, allowing this initial
1283 event to be accepted. */
1285 v4l2_event_queue_fh(sev
->fh
, &ev
);
1289 mutex_unlock(&handle
->chain
->ctrl_mutex
);
1293 static void uvc_ctrl_del_event(struct v4l2_subscribed_event
*sev
)
1295 struct uvc_fh
*handle
= container_of(sev
->fh
, struct uvc_fh
, vfh
);
1297 mutex_lock(&handle
->chain
->ctrl_mutex
);
1298 list_del(&sev
->node
);
1299 mutex_unlock(&handle
->chain
->ctrl_mutex
);
1302 const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops
= {
1303 .add
= uvc_ctrl_add_event
,
1304 .del
= uvc_ctrl_del_event
,
1305 .replace
= v4l2_ctrl_replace
,
1306 .merge
= v4l2_ctrl_merge
,
1309 /* --------------------------------------------------------------------------
1310 * Control transactions
1312 * To make extended set operations as atomic as the hardware allows, controls
1313 * are handled using begin/commit/rollback operations.
1315 * At the beginning of a set request, uvc_ctrl_begin should be called to
1316 * initialize the request. This function acquires the control lock.
1318 * When setting a control, the new value is stored in the control data field
1319 * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for
1320 * later processing. If the UVC and V4L2 control sizes differ, the current
1321 * value is loaded from the hardware before storing the new value in the data
1324 * After processing all controls in the transaction, uvc_ctrl_commit or
1325 * uvc_ctrl_rollback must be called to apply the pending changes to the
1326 * hardware or revert them. When applying changes, all controls marked as
1327 * dirty will be modified in the UVC device, and the dirty flag will be
1328 * cleared. When reverting controls, the control data field
1329 * UVC_CTRL_DATA_CURRENT is reverted to its previous value
1330 * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the
1333 int uvc_ctrl_begin(struct uvc_video_chain
*chain
)
1335 return mutex_lock_interruptible(&chain
->ctrl_mutex
) ? -ERESTARTSYS
: 0;
1338 static int uvc_ctrl_commit_entity(struct uvc_device
*dev
,
1339 struct uvc_entity
*entity
, int rollback
)
1341 struct uvc_control
*ctrl
;
1348 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
1349 ctrl
= &entity
->controls
[i
];
1350 if (!ctrl
->initialized
)
1353 /* Reset the loaded flag for auto-update controls that were
1354 * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent
1355 * uvc_ctrl_get from using the cached value, and for write-only
1356 * controls to prevent uvc_ctrl_set from setting bits not
1357 * explicitly set by the user.
1359 if (ctrl
->info
.flags
& UVC_CTRL_FLAG_AUTO_UPDATE
||
1360 !(ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_CUR
))
1367 ret
= uvc_query_ctrl(dev
, UVC_SET_CUR
, ctrl
->entity
->id
,
1368 dev
->intfnum
, ctrl
->info
.selector
,
1369 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
1374 if (rollback
|| ret
< 0)
1375 memcpy(uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
1376 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_BACKUP
),
1388 int __uvc_ctrl_commit(struct uvc_fh
*handle
, int rollback
,
1389 const struct v4l2_ext_control
*xctrls
,
1390 unsigned int xctrls_count
)
1392 struct uvc_video_chain
*chain
= handle
->chain
;
1393 struct uvc_entity
*entity
;
1396 /* Find the control. */
1397 list_for_each_entry(entity
, &chain
->entities
, chain
) {
1398 ret
= uvc_ctrl_commit_entity(chain
->dev
, entity
, rollback
);
1404 uvc_ctrl_send_events(handle
, xctrls
, xctrls_count
);
1406 mutex_unlock(&chain
->ctrl_mutex
);
1410 int uvc_ctrl_get(struct uvc_video_chain
*chain
,
1411 struct v4l2_ext_control
*xctrl
)
1413 struct uvc_control
*ctrl
;
1414 struct uvc_control_mapping
*mapping
;
1416 ctrl
= uvc_find_control(chain
, xctrl
->id
, &mapping
);
1420 return __uvc_ctrl_get(chain
, ctrl
, mapping
, &xctrl
->value
);
1423 int uvc_ctrl_set(struct uvc_video_chain
*chain
,
1424 struct v4l2_ext_control
*xctrl
)
1426 struct uvc_control
*ctrl
;
1427 struct uvc_control_mapping
*mapping
;
1434 ctrl
= uvc_find_control(chain
, xctrl
->id
, &mapping
);
1437 if (!(ctrl
->info
.flags
& UVC_CTRL_FLAG_SET_CUR
))
1440 /* Clamp out of range values. */
1441 switch (mapping
->v4l2_type
) {
1442 case V4L2_CTRL_TYPE_INTEGER
:
1443 if (!ctrl
->cached
) {
1444 ret
= uvc_ctrl_populate_cache(chain
, ctrl
);
1449 min
= mapping
->get(mapping
, UVC_GET_MIN
,
1450 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MIN
));
1451 max
= mapping
->get(mapping
, UVC_GET_MAX
,
1452 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_MAX
));
1453 step
= mapping
->get(mapping
, UVC_GET_RES
,
1454 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
));
1458 xctrl
->value
= min
+ (xctrl
->value
- min
+ step
/2) / step
* step
;
1459 xctrl
->value
= clamp(xctrl
->value
, min
, max
);
1460 value
= xctrl
->value
;
1463 case V4L2_CTRL_TYPE_BOOLEAN
:
1464 xctrl
->value
= clamp(xctrl
->value
, 0, 1);
1465 value
= xctrl
->value
;
1468 case V4L2_CTRL_TYPE_MENU
:
1469 if (xctrl
->value
< 0 || xctrl
->value
>= mapping
->menu_count
)
1471 value
= mapping
->menu_info
[xctrl
->value
].value
;
1473 /* Valid menu indices are reported by the GET_RES request for
1474 * UVC controls that support it.
1476 if (mapping
->data_type
== UVC_CTRL_DATA_TYPE_BITMASK
&&
1477 (ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_RES
)) {
1478 if (!ctrl
->cached
) {
1479 ret
= uvc_ctrl_populate_cache(chain
, ctrl
);
1484 step
= mapping
->get(mapping
, UVC_GET_RES
,
1485 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_RES
));
1486 if (!(step
& value
))
1493 value
= xctrl
->value
;
1497 /* If the mapping doesn't span the whole UVC control, the current value
1498 * needs to be loaded from the device to perform the read-modify-write
1501 if (!ctrl
->loaded
&& (ctrl
->info
.size
* 8) != mapping
->size
) {
1502 if ((ctrl
->info
.flags
& UVC_CTRL_FLAG_GET_CUR
) == 0) {
1503 memset(uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
1504 0, ctrl
->info
.size
);
1506 ret
= uvc_query_ctrl(chain
->dev
, UVC_GET_CUR
,
1507 ctrl
->entity
->id
, chain
->dev
->intfnum
,
1508 ctrl
->info
.selector
,
1509 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
1518 /* Backup the current value in case we need to rollback later. */
1520 memcpy(uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_BACKUP
),
1521 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
),
1525 mapping
->set(mapping
, value
,
1526 uvc_ctrl_data(ctrl
, UVC_CTRL_DATA_CURRENT
));
1533 /* --------------------------------------------------------------------------
1537 static void uvc_ctrl_fixup_xu_info(struct uvc_device
*dev
,
1538 const struct uvc_control
*ctrl
, struct uvc_control_info
*info
)
1540 struct uvc_ctrl_fixup
{
1541 struct usb_device_id id
;
1547 static const struct uvc_ctrl_fixup fixups
[] = {
1548 { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1,
1549 UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX
|
1550 UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_SET_CUR
|
1551 UVC_CTRL_FLAG_AUTO_UPDATE
},
1552 { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1,
1553 UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX
|
1554 UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_SET_CUR
|
1555 UVC_CTRL_FLAG_AUTO_UPDATE
},
1556 { { USB_DEVICE(0x046d, 0x0994) }, 9, 1,
1557 UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX
|
1558 UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_SET_CUR
|
1559 UVC_CTRL_FLAG_AUTO_UPDATE
},
1564 for (i
= 0; i
< ARRAY_SIZE(fixups
); ++i
) {
1565 if (!usb_match_one_id(dev
->intf
, &fixups
[i
].id
))
1568 if (fixups
[i
].entity
== ctrl
->entity
->id
&&
1569 fixups
[i
].selector
== info
->selector
) {
1570 info
->flags
= fixups
[i
].flags
;
1577 * Query control information (size and flags) for XU controls.
1579 static int uvc_ctrl_fill_xu_info(struct uvc_device
*dev
,
1580 const struct uvc_control
*ctrl
, struct uvc_control_info
*info
)
1585 data
= kmalloc(2, GFP_KERNEL
);
1589 memcpy(info
->entity
, ctrl
->entity
->extension
.guidExtensionCode
,
1590 sizeof(info
->entity
));
1591 info
->index
= ctrl
->index
;
1592 info
->selector
= ctrl
->index
+ 1;
1594 /* Query and verify the control length (GET_LEN) */
1595 ret
= uvc_query_ctrl(dev
, UVC_GET_LEN
, ctrl
->entity
->id
, dev
->intfnum
,
1596 info
->selector
, data
, 2);
1598 uvc_trace(UVC_TRACE_CONTROL
,
1599 "GET_LEN failed on control %pUl/%u (%d).\n",
1600 info
->entity
, info
->selector
, ret
);
1604 info
->size
= le16_to_cpup((__le16
*)data
);
1606 /* Query the control information (GET_INFO) */
1607 ret
= uvc_query_ctrl(dev
, UVC_GET_INFO
, ctrl
->entity
->id
, dev
->intfnum
,
1608 info
->selector
, data
, 1);
1610 uvc_trace(UVC_TRACE_CONTROL
,
1611 "GET_INFO failed on control %pUl/%u (%d).\n",
1612 info
->entity
, info
->selector
, ret
);
1616 info
->flags
= UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX
1617 | UVC_CTRL_FLAG_GET_RES
| UVC_CTRL_FLAG_GET_DEF
1618 | (data
[0] & UVC_CONTROL_CAP_GET
?
1619 UVC_CTRL_FLAG_GET_CUR
: 0)
1620 | (data
[0] & UVC_CONTROL_CAP_SET
?
1621 UVC_CTRL_FLAG_SET_CUR
: 0)
1622 | (data
[0] & UVC_CONTROL_CAP_AUTOUPDATE
?
1623 UVC_CTRL_FLAG_AUTO_UPDATE
: 0);
1625 uvc_ctrl_fixup_xu_info(dev
, ctrl
, info
);
1627 uvc_trace(UVC_TRACE_CONTROL
, "XU control %pUl/%u queried: len %u, "
1628 "flags { get %u set %u auto %u }.\n",
1629 info
->entity
, info
->selector
, info
->size
,
1630 (info
->flags
& UVC_CTRL_FLAG_GET_CUR
) ? 1 : 0,
1631 (info
->flags
& UVC_CTRL_FLAG_SET_CUR
) ? 1 : 0,
1632 (info
->flags
& UVC_CTRL_FLAG_AUTO_UPDATE
) ? 1 : 0);
1639 static int uvc_ctrl_add_info(struct uvc_device
*dev
, struct uvc_control
*ctrl
,
1640 const struct uvc_control_info
*info
);
1642 static int uvc_ctrl_init_xu_ctrl(struct uvc_device
*dev
,
1643 struct uvc_control
*ctrl
)
1645 struct uvc_control_info info
;
1648 if (ctrl
->initialized
)
1651 ret
= uvc_ctrl_fill_xu_info(dev
, ctrl
, &info
);
1655 ret
= uvc_ctrl_add_info(dev
, ctrl
, &info
);
1657 uvc_trace(UVC_TRACE_CONTROL
, "Failed to initialize control "
1658 "%pUl/%u on device %s entity %u\n", info
.entity
,
1659 info
.selector
, dev
->udev
->devpath
, ctrl
->entity
->id
);
1664 int uvc_xu_ctrl_query(struct uvc_video_chain
*chain
,
1665 struct uvc_xu_control_query
*xqry
)
1667 struct uvc_entity
*entity
;
1668 struct uvc_control
*ctrl
;
1669 unsigned int i
, found
= 0;
1675 /* Find the extension unit. */
1676 list_for_each_entry(entity
, &chain
->entities
, chain
) {
1677 if (UVC_ENTITY_TYPE(entity
) == UVC_VC_EXTENSION_UNIT
&&
1678 entity
->id
== xqry
->unit
)
1682 if (entity
->id
!= xqry
->unit
) {
1683 uvc_trace(UVC_TRACE_CONTROL
, "Extension unit %u not found.\n",
1688 /* Find the control and perform delayed initialization if needed. */
1689 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
1690 ctrl
= &entity
->controls
[i
];
1691 if (ctrl
->index
== xqry
->selector
- 1) {
1698 uvc_trace(UVC_TRACE_CONTROL
, "Control %pUl/%u not found.\n",
1699 entity
->extension
.guidExtensionCode
, xqry
->selector
);
1703 if (mutex_lock_interruptible(&chain
->ctrl_mutex
))
1704 return -ERESTARTSYS
;
1706 ret
= uvc_ctrl_init_xu_ctrl(chain
->dev
, ctrl
);
1712 /* Validate the required buffer size and flags for the request */
1714 size
= ctrl
->info
.size
;
1716 switch (xqry
->query
) {
1718 reqflags
= UVC_CTRL_FLAG_GET_CUR
;
1721 reqflags
= UVC_CTRL_FLAG_GET_MIN
;
1724 reqflags
= UVC_CTRL_FLAG_GET_MAX
;
1727 reqflags
= UVC_CTRL_FLAG_GET_DEF
;
1730 reqflags
= UVC_CTRL_FLAG_GET_RES
;
1733 reqflags
= UVC_CTRL_FLAG_SET_CUR
;
1746 if (size
!= xqry
->size
) {
1751 if (reqflags
&& !(ctrl
->info
.flags
& reqflags
)) {
1756 data
= kmalloc(size
, GFP_KERNEL
);
1762 if (xqry
->query
== UVC_SET_CUR
&&
1763 copy_from_user(data
, xqry
->data
, size
)) {
1768 ret
= uvc_query_ctrl(chain
->dev
, xqry
->query
, xqry
->unit
,
1769 chain
->dev
->intfnum
, xqry
->selector
, data
, size
);
1773 if (xqry
->query
!= UVC_SET_CUR
&&
1774 copy_to_user(xqry
->data
, data
, size
))
1778 mutex_unlock(&chain
->ctrl_mutex
);
1782 /* --------------------------------------------------------------------------
1787 * Restore control values after resume, skipping controls that haven't been
1791 * - Don't restore modified controls that are back to their default value.
1792 * - Handle restore order (Auto-Exposure Mode should be restored before
1795 int uvc_ctrl_resume_device(struct uvc_device
*dev
)
1797 struct uvc_control
*ctrl
;
1798 struct uvc_entity
*entity
;
1802 /* Walk the entities list and restore controls when possible. */
1803 list_for_each_entry(entity
, &dev
->entities
, list
) {
1805 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
1806 ctrl
= &entity
->controls
[i
];
1808 if (!ctrl
->initialized
|| !ctrl
->modified
||
1809 (ctrl
->info
.flags
& UVC_CTRL_FLAG_RESTORE
) == 0)
1812 printk(KERN_INFO
"restoring control %pUl/%u/%u\n",
1813 ctrl
->info
.entity
, ctrl
->info
.index
,
1814 ctrl
->info
.selector
);
1818 ret
= uvc_ctrl_commit_entity(dev
, entity
, 0);
1826 /* --------------------------------------------------------------------------
1827 * Control and mapping handling
1831 * Add control information to a given control.
1833 static int uvc_ctrl_add_info(struct uvc_device
*dev
, struct uvc_control
*ctrl
,
1834 const struct uvc_control_info
*info
)
1838 memcpy(&ctrl
->info
, info
, sizeof(*info
));
1839 INIT_LIST_HEAD(&ctrl
->info
.mappings
);
1841 /* Allocate an array to save control values (cur, def, max, etc.) */
1842 ctrl
->uvc_data
= kzalloc(ctrl
->info
.size
* UVC_CTRL_DATA_LAST
+ 1,
1844 if (ctrl
->uvc_data
== NULL
) {
1849 ctrl
->initialized
= 1;
1851 uvc_trace(UVC_TRACE_CONTROL
, "Added control %pUl/%u to device %s "
1852 "entity %u\n", ctrl
->info
.entity
, ctrl
->info
.selector
,
1853 dev
->udev
->devpath
, ctrl
->entity
->id
);
1857 kfree(ctrl
->uvc_data
);
1862 * Add a control mapping to a given control.
1864 static int __uvc_ctrl_add_mapping(struct uvc_device
*dev
,
1865 struct uvc_control
*ctrl
, const struct uvc_control_mapping
*mapping
)
1867 struct uvc_control_mapping
*map
;
1870 /* Most mappings come from static kernel data and need to be duplicated.
1871 * Mappings that come from userspace will be unnecessarily duplicated,
1872 * this could be optimized.
1874 map
= kmemdup(mapping
, sizeof(*mapping
), GFP_KERNEL
);
1878 INIT_LIST_HEAD(&map
->ev_subs
);
1880 size
= sizeof(*mapping
->menu_info
) * mapping
->menu_count
;
1881 map
->menu_info
= kmemdup(mapping
->menu_info
, size
, GFP_KERNEL
);
1882 if (map
->menu_info
== NULL
) {
1887 if (map
->get
== NULL
)
1888 map
->get
= uvc_get_le_value
;
1889 if (map
->set
== NULL
)
1890 map
->set
= uvc_set_le_value
;
1892 list_add_tail(&map
->list
, &ctrl
->info
.mappings
);
1893 uvc_trace(UVC_TRACE_CONTROL
,
1894 "Adding mapping '%s' to control %pUl/%u.\n",
1895 map
->name
, ctrl
->info
.entity
, ctrl
->info
.selector
);
1900 int uvc_ctrl_add_mapping(struct uvc_video_chain
*chain
,
1901 const struct uvc_control_mapping
*mapping
)
1903 struct uvc_device
*dev
= chain
->dev
;
1904 struct uvc_control_mapping
*map
;
1905 struct uvc_entity
*entity
;
1906 struct uvc_control
*ctrl
;
1910 if (mapping
->id
& ~V4L2_CTRL_ID_MASK
) {
1911 uvc_trace(UVC_TRACE_CONTROL
, "Can't add mapping '%s', control "
1912 "id 0x%08x is invalid.\n", mapping
->name
,
1917 /* Search for the matching (GUID/CS) control on the current chain */
1918 list_for_each_entry(entity
, &chain
->entities
, chain
) {
1921 if (UVC_ENTITY_TYPE(entity
) != UVC_VC_EXTENSION_UNIT
||
1922 !uvc_entity_match_guid(entity
, mapping
->entity
))
1925 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
1926 ctrl
= &entity
->controls
[i
];
1927 if (ctrl
->index
== mapping
->selector
- 1) {
1939 if (mutex_lock_interruptible(&chain
->ctrl_mutex
))
1940 return -ERESTARTSYS
;
1942 /* Perform delayed initialization of XU controls */
1943 ret
= uvc_ctrl_init_xu_ctrl(dev
, ctrl
);
1949 list_for_each_entry(map
, &ctrl
->info
.mappings
, list
) {
1950 if (mapping
->id
== map
->id
) {
1951 uvc_trace(UVC_TRACE_CONTROL
, "Can't add mapping '%s', "
1952 "control id 0x%08x already exists.\n",
1953 mapping
->name
, mapping
->id
);
1959 /* Prevent excess memory consumption */
1960 if (atomic_inc_return(&dev
->nmappings
) > UVC_MAX_CONTROL_MAPPINGS
) {
1961 atomic_dec(&dev
->nmappings
);
1962 uvc_trace(UVC_TRACE_CONTROL
, "Can't add mapping '%s', maximum "
1963 "mappings count (%u) exceeded.\n", mapping
->name
,
1964 UVC_MAX_CONTROL_MAPPINGS
);
1969 ret
= __uvc_ctrl_add_mapping(dev
, ctrl
, mapping
);
1971 atomic_dec(&dev
->nmappings
);
1974 mutex_unlock(&chain
->ctrl_mutex
);
1979 * Prune an entity of its bogus controls using a blacklist. Bogus controls
1980 * are currently the ones that crash the camera or unconditionally return an
1981 * error when queried.
1983 static void uvc_ctrl_prune_entity(struct uvc_device
*dev
,
1984 struct uvc_entity
*entity
)
1986 struct uvc_ctrl_blacklist
{
1987 struct usb_device_id id
;
1991 static const struct uvc_ctrl_blacklist processing_blacklist
[] = {
1992 { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */
1993 { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */
1994 { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */
1996 static const struct uvc_ctrl_blacklist camera_blacklist
[] = {
1997 { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */
2000 const struct uvc_ctrl_blacklist
*blacklist
;
2006 switch (UVC_ENTITY_TYPE(entity
)) {
2007 case UVC_VC_PROCESSING_UNIT
:
2008 blacklist
= processing_blacklist
;
2009 count
= ARRAY_SIZE(processing_blacklist
);
2010 controls
= entity
->processing
.bmControls
;
2011 size
= entity
->processing
.bControlSize
;
2014 case UVC_ITT_CAMERA
:
2015 blacklist
= camera_blacklist
;
2016 count
= ARRAY_SIZE(camera_blacklist
);
2017 controls
= entity
->camera
.bmControls
;
2018 size
= entity
->camera
.bControlSize
;
2025 for (i
= 0; i
< count
; ++i
) {
2026 if (!usb_match_one_id(dev
->intf
, &blacklist
[i
].id
))
2029 if (blacklist
[i
].index
>= 8 * size
||
2030 !uvc_test_bit(controls
, blacklist
[i
].index
))
2033 uvc_trace(UVC_TRACE_CONTROL
, "%u/%u control is black listed, "
2034 "removing it.\n", entity
->id
, blacklist
[i
].index
);
2036 uvc_clear_bit(controls
, blacklist
[i
].index
);
2041 * Add control information and hardcoded stock control mappings to the given
2044 static void uvc_ctrl_init_ctrl(struct uvc_device
*dev
, struct uvc_control
*ctrl
)
2046 const struct uvc_control_info
*info
= uvc_ctrls
;
2047 const struct uvc_control_info
*iend
= info
+ ARRAY_SIZE(uvc_ctrls
);
2048 const struct uvc_control_mapping
*mapping
= uvc_ctrl_mappings
;
2049 const struct uvc_control_mapping
*mend
=
2050 mapping
+ ARRAY_SIZE(uvc_ctrl_mappings
);
2052 /* XU controls initialization requires querying the device for control
2053 * information. As some buggy UVC devices will crash when queried
2054 * repeatedly in a tight loop, delay XU controls initialization until
2057 if (UVC_ENTITY_TYPE(ctrl
->entity
) == UVC_VC_EXTENSION_UNIT
)
2060 for (; info
< iend
; ++info
) {
2061 if (uvc_entity_match_guid(ctrl
->entity
, info
->entity
) &&
2062 ctrl
->index
== info
->index
) {
2063 uvc_ctrl_add_info(dev
, ctrl
, info
);
2068 if (!ctrl
->initialized
)
2071 for (; mapping
< mend
; ++mapping
) {
2072 if (uvc_entity_match_guid(ctrl
->entity
, mapping
->entity
) &&
2073 ctrl
->info
.selector
== mapping
->selector
)
2074 __uvc_ctrl_add_mapping(dev
, ctrl
, mapping
);
2079 * Initialize device controls.
2081 int uvc_ctrl_init_device(struct uvc_device
*dev
)
2083 struct uvc_entity
*entity
;
2086 /* Walk the entities list and instantiate controls */
2087 list_for_each_entry(entity
, &dev
->entities
, list
) {
2088 struct uvc_control
*ctrl
;
2089 unsigned int bControlSize
= 0, ncontrols
;
2090 __u8
*bmControls
= NULL
;
2092 if (UVC_ENTITY_TYPE(entity
) == UVC_VC_EXTENSION_UNIT
) {
2093 bmControls
= entity
->extension
.bmControls
;
2094 bControlSize
= entity
->extension
.bControlSize
;
2095 } else if (UVC_ENTITY_TYPE(entity
) == UVC_VC_PROCESSING_UNIT
) {
2096 bmControls
= entity
->processing
.bmControls
;
2097 bControlSize
= entity
->processing
.bControlSize
;
2098 } else if (UVC_ENTITY_TYPE(entity
) == UVC_ITT_CAMERA
) {
2099 bmControls
= entity
->camera
.bmControls
;
2100 bControlSize
= entity
->camera
.bControlSize
;
2103 /* Remove bogus/blacklisted controls */
2104 uvc_ctrl_prune_entity(dev
, entity
);
2106 /* Count supported controls and allocate the controls array */
2107 ncontrols
= memweight(bmControls
, bControlSize
);
2111 entity
->controls
= kcalloc(ncontrols
, sizeof(*ctrl
),
2113 if (entity
->controls
== NULL
)
2115 entity
->ncontrols
= ncontrols
;
2117 /* Initialize all supported controls */
2118 ctrl
= entity
->controls
;
2119 for (i
= 0; i
< bControlSize
* 8; ++i
) {
2120 if (uvc_test_bit(bmControls
, i
) == 0)
2123 ctrl
->entity
= entity
;
2126 uvc_ctrl_init_ctrl(dev
, ctrl
);
2135 * Cleanup device controls.
2137 static void uvc_ctrl_cleanup_mappings(struct uvc_device
*dev
,
2138 struct uvc_control
*ctrl
)
2140 struct uvc_control_mapping
*mapping
, *nm
;
2142 list_for_each_entry_safe(mapping
, nm
, &ctrl
->info
.mappings
, list
) {
2143 list_del(&mapping
->list
);
2144 kfree(mapping
->menu_info
);
2149 void uvc_ctrl_cleanup_device(struct uvc_device
*dev
)
2151 struct uvc_entity
*entity
;
2154 /* Free controls and control mappings for all entities. */
2155 list_for_each_entry(entity
, &dev
->entities
, list
) {
2156 for (i
= 0; i
< entity
->ncontrols
; ++i
) {
2157 struct uvc_control
*ctrl
= &entity
->controls
[i
];
2159 if (!ctrl
->initialized
)
2162 uvc_ctrl_cleanup_mappings(dev
, ctrl
);
2163 kfree(ctrl
->uvc_data
);
2166 kfree(entity
->controls
);