diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
-rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 1919 |
1 files changed, 1919 insertions, 0 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c new file mode 100644 index 00000000000..10c2364f3e8 --- /dev/null +++ b/drivers/media/video/uvc/uvc_ctrl.c | |||
@@ -0,0 +1,1919 @@ | |||
1 | /* | ||
2 | * uvc_ctrl.c -- USB Video Class driver - Controls | ||
3 | * | ||
4 | * Copyright (C) 2005-2010 | ||
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | */ | ||
13 | |||
14 | #include <linux/kernel.h> | ||
15 | #include <linux/list.h> | ||
16 | #include <linux/module.h> | ||
17 | #include <linux/slab.h> | ||
18 | #include <linux/uaccess.h> | ||
19 | #include <linux/usb.h> | ||
20 | #include <linux/videodev2.h> | ||
21 | #include <linux/vmalloc.h> | ||
22 | #include <linux/wait.h> | ||
23 | #include <linux/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_CTRL_FLAG_SET_CUR | ||
46 | | UVC_CTRL_FLAG_GET_RANGE | ||
47 | | UVC_CTRL_FLAG_RESTORE, | ||
48 | }, | ||
49 | { | ||
50 | .entity = UVC_GUID_UVC_PROCESSING, | ||
51 | .selector = UVC_PU_CONTRAST_CONTROL, | ||
52 | .index = 1, | ||
53 | .size = 2, | ||
54 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
55 | | UVC_CTRL_FLAG_GET_RANGE | ||
56 | | UVC_CTRL_FLAG_RESTORE, | ||
57 | }, | ||
58 | { | ||
59 | .entity = UVC_GUID_UVC_PROCESSING, | ||
60 | .selector = UVC_PU_HUE_CONTROL, | ||
61 | .index = 2, | ||
62 | .size = 2, | ||
63 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
64 | | UVC_CTRL_FLAG_GET_RANGE | ||
65 | | UVC_CTRL_FLAG_RESTORE | ||
66 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
67 | }, | ||
68 | { | ||
69 | .entity = UVC_GUID_UVC_PROCESSING, | ||
70 | .selector = UVC_PU_SATURATION_CONTROL, | ||
71 | .index = 3, | ||
72 | .size = 2, | ||
73 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
74 | | UVC_CTRL_FLAG_GET_RANGE | ||
75 | | UVC_CTRL_FLAG_RESTORE, | ||
76 | }, | ||
77 | { | ||
78 | .entity = UVC_GUID_UVC_PROCESSING, | ||
79 | .selector = UVC_PU_SHARPNESS_CONTROL, | ||
80 | .index = 4, | ||
81 | .size = 2, | ||
82 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
83 | | UVC_CTRL_FLAG_GET_RANGE | ||
84 | | UVC_CTRL_FLAG_RESTORE, | ||
85 | }, | ||
86 | { | ||
87 | .entity = UVC_GUID_UVC_PROCESSING, | ||
88 | .selector = UVC_PU_GAMMA_CONTROL, | ||
89 | .index = 5, | ||
90 | .size = 2, | ||
91 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
92 | | UVC_CTRL_FLAG_GET_RANGE | ||
93 | | UVC_CTRL_FLAG_RESTORE, | ||
94 | }, | ||
95 | { | ||
96 | .entity = UVC_GUID_UVC_PROCESSING, | ||
97 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, | ||
98 | .index = 6, | ||
99 | .size = 2, | ||
100 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
101 | | UVC_CTRL_FLAG_GET_RANGE | ||
102 | | UVC_CTRL_FLAG_RESTORE | ||
103 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
104 | }, | ||
105 | { | ||
106 | .entity = UVC_GUID_UVC_PROCESSING, | ||
107 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, | ||
108 | .index = 7, | ||
109 | .size = 4, | ||
110 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
111 | | UVC_CTRL_FLAG_GET_RANGE | ||
112 | | UVC_CTRL_FLAG_RESTORE | ||
113 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
114 | }, | ||
115 | { | ||
116 | .entity = UVC_GUID_UVC_PROCESSING, | ||
117 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, | ||
118 | .index = 8, | ||
119 | .size = 2, | ||
120 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
121 | | UVC_CTRL_FLAG_GET_RANGE | ||
122 | | UVC_CTRL_FLAG_RESTORE, | ||
123 | }, | ||
124 | { | ||
125 | .entity = UVC_GUID_UVC_PROCESSING, | ||
126 | .selector = UVC_PU_GAIN_CONTROL, | ||
127 | .index = 9, | ||
128 | .size = 2, | ||
129 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
130 | | UVC_CTRL_FLAG_GET_RANGE | ||
131 | | UVC_CTRL_FLAG_RESTORE, | ||
132 | }, | ||
133 | { | ||
134 | .entity = UVC_GUID_UVC_PROCESSING, | ||
135 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, | ||
136 | .index = 10, | ||
137 | .size = 1, | ||
138 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
139 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | ||
140 | }, | ||
141 | { | ||
142 | .entity = UVC_GUID_UVC_PROCESSING, | ||
143 | .selector = UVC_PU_HUE_AUTO_CONTROL, | ||
144 | .index = 11, | ||
145 | .size = 1, | ||
146 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
147 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | ||
148 | }, | ||
149 | { | ||
150 | .entity = UVC_GUID_UVC_PROCESSING, | ||
151 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, | ||
152 | .index = 12, | ||
153 | .size = 1, | ||
154 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
155 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | ||
156 | }, | ||
157 | { | ||
158 | .entity = UVC_GUID_UVC_PROCESSING, | ||
159 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, | ||
160 | .index = 13, | ||
161 | .size = 1, | ||
162 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
163 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | ||
164 | }, | ||
165 | { | ||
166 | .entity = UVC_GUID_UVC_PROCESSING, | ||
167 | .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL, | ||
168 | .index = 14, | ||
169 | .size = 2, | ||
170 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
171 | | UVC_CTRL_FLAG_GET_RANGE | ||
172 | | UVC_CTRL_FLAG_RESTORE, | ||
173 | }, | ||
174 | { | ||
175 | .entity = UVC_GUID_UVC_PROCESSING, | ||
176 | .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL, | ||
177 | .index = 15, | ||
178 | .size = 2, | ||
179 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
180 | | UVC_CTRL_FLAG_GET_RANGE | ||
181 | | UVC_CTRL_FLAG_RESTORE, | ||
182 | }, | ||
183 | { | ||
184 | .entity = UVC_GUID_UVC_PROCESSING, | ||
185 | .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL, | ||
186 | .index = 16, | ||
187 | .size = 1, | ||
188 | .flags = UVC_CTRL_FLAG_GET_CUR, | ||
189 | }, | ||
190 | { | ||
191 | .entity = UVC_GUID_UVC_PROCESSING, | ||
192 | .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL, | ||
193 | .index = 17, | ||
194 | .size = 1, | ||
195 | .flags = UVC_CTRL_FLAG_GET_CUR, | ||
196 | }, | ||
197 | { | ||
198 | .entity = UVC_GUID_UVC_CAMERA, | ||
199 | .selector = UVC_CT_SCANNING_MODE_CONTROL, | ||
200 | .index = 0, | ||
201 | .size = 1, | ||
202 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
203 | | UVC_CTRL_FLAG_RESTORE, | ||
204 | }, | ||
205 | { | ||
206 | .entity = UVC_GUID_UVC_CAMERA, | ||
207 | .selector = UVC_CT_AE_MODE_CONTROL, | ||
208 | .index = 1, | ||
209 | .size = 1, | ||
210 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
211 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_GET_RES | ||
212 | | UVC_CTRL_FLAG_RESTORE, | ||
213 | }, | ||
214 | { | ||
215 | .entity = UVC_GUID_UVC_CAMERA, | ||
216 | .selector = UVC_CT_AE_PRIORITY_CONTROL, | ||
217 | .index = 2, | ||
218 | .size = 1, | ||
219 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
220 | | UVC_CTRL_FLAG_RESTORE, | ||
221 | }, | ||
222 | { | ||
223 | .entity = UVC_GUID_UVC_CAMERA, | ||
224 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, | ||
225 | .index = 3, | ||
226 | .size = 4, | ||
227 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
228 | | UVC_CTRL_FLAG_GET_RANGE | ||
229 | | UVC_CTRL_FLAG_RESTORE, | ||
230 | }, | ||
231 | { | ||
232 | .entity = UVC_GUID_UVC_CAMERA, | ||
233 | .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL, | ||
234 | .index = 4, | ||
235 | .size = 1, | ||
236 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE, | ||
237 | }, | ||
238 | { | ||
239 | .entity = UVC_GUID_UVC_CAMERA, | ||
240 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, | ||
241 | .index = 5, | ||
242 | .size = 2, | ||
243 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
244 | | UVC_CTRL_FLAG_GET_RANGE | ||
245 | | UVC_CTRL_FLAG_RESTORE | ||
246 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
247 | }, | ||
248 | { | ||
249 | .entity = UVC_GUID_UVC_CAMERA, | ||
250 | .selector = UVC_CT_FOCUS_RELATIVE_CONTROL, | ||
251 | .index = 6, | ||
252 | .size = 2, | ||
253 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | ||
254 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | ||
255 | | UVC_CTRL_FLAG_GET_DEF | ||
256 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
257 | }, | ||
258 | { | ||
259 | .entity = UVC_GUID_UVC_CAMERA, | ||
260 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | ||
261 | .index = 7, | ||
262 | .size = 2, | ||
263 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
264 | | UVC_CTRL_FLAG_GET_RANGE | ||
265 | | UVC_CTRL_FLAG_RESTORE | ||
266 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
267 | }, | ||
268 | { | ||
269 | .entity = UVC_GUID_UVC_CAMERA, | ||
270 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | ||
271 | .index = 8, | ||
272 | .size = 1, | ||
273 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
274 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
275 | }, | ||
276 | { | ||
277 | .entity = UVC_GUID_UVC_CAMERA, | ||
278 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, | ||
279 | .index = 9, | ||
280 | .size = 2, | ||
281 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
282 | | UVC_CTRL_FLAG_GET_RANGE | ||
283 | | UVC_CTRL_FLAG_RESTORE | ||
284 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
285 | }, | ||
286 | { | ||
287 | .entity = UVC_GUID_UVC_CAMERA, | ||
288 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, | ||
289 | .index = 10, | ||
290 | .size = 3, | ||
291 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | ||
292 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | ||
293 | | UVC_CTRL_FLAG_GET_DEF | ||
294 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
295 | }, | ||
296 | { | ||
297 | .entity = UVC_GUID_UVC_CAMERA, | ||
298 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | ||
299 | .index = 11, | ||
300 | .size = 8, | ||
301 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
302 | | UVC_CTRL_FLAG_GET_RANGE | ||
303 | | UVC_CTRL_FLAG_RESTORE | ||
304 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
305 | }, | ||
306 | { | ||
307 | .entity = UVC_GUID_UVC_CAMERA, | ||
308 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, | ||
309 | .index = 12, | ||
310 | .size = 4, | ||
311 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | ||
312 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | ||
313 | | UVC_CTRL_FLAG_GET_DEF | ||
314 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
315 | }, | ||
316 | { | ||
317 | .entity = UVC_GUID_UVC_CAMERA, | ||
318 | .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL, | ||
319 | .index = 13, | ||
320 | .size = 2, | ||
321 | .flags = UVC_CTRL_FLAG_SET_CUR | ||
322 | | UVC_CTRL_FLAG_GET_RANGE | ||
323 | | UVC_CTRL_FLAG_RESTORE | ||
324 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
325 | }, | ||
326 | { | ||
327 | .entity = UVC_GUID_UVC_CAMERA, | ||
328 | .selector = UVC_CT_ROLL_RELATIVE_CONTROL, | ||
329 | .index = 14, | ||
330 | .size = 2, | ||
331 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | ||
332 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | ||
333 | | UVC_CTRL_FLAG_GET_DEF | ||
334 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
335 | }, | ||
336 | { | ||
337 | .entity = UVC_GUID_UVC_CAMERA, | ||
338 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, | ||
339 | .index = 17, | ||
340 | .size = 1, | ||
341 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
342 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | ||
343 | }, | ||
344 | { | ||
345 | .entity = UVC_GUID_UVC_CAMERA, | ||
346 | .selector = UVC_CT_PRIVACY_CONTROL, | ||
347 | .index = 18, | ||
348 | .size = 1, | ||
349 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | ||
350 | | UVC_CTRL_FLAG_RESTORE | ||
351 | | UVC_CTRL_FLAG_AUTO_UPDATE, | ||
352 | }, | ||
353 | }; | ||
354 | |||
355 | static struct uvc_menu_info power_line_frequency_controls[] = { | ||
356 | { 0, "Disabled" }, | ||
357 | { 1, "50 Hz" }, | ||
358 | { 2, "60 Hz" }, | ||
359 | }; | ||
360 | |||
361 | static struct uvc_menu_info exposure_auto_controls[] = { | ||
362 | { 2, "Auto Mode" }, | ||
363 | { 1, "Manual Mode" }, | ||
364 | { 4, "Shutter Priority Mode" }, | ||
365 | { 8, "Aperture Priority Mode" }, | ||
366 | }; | ||
367 | |||
368 | static __s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, | ||
369 | __u8 query, const __u8 *data) | ||
370 | { | ||
371 | __s8 zoom = (__s8)data[0]; | ||
372 | |||
373 | switch (query) { | ||
374 | case UVC_GET_CUR: | ||
375 | return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); | ||
376 | |||
377 | case UVC_GET_MIN: | ||
378 | case UVC_GET_MAX: | ||
379 | case UVC_GET_RES: | ||
380 | case UVC_GET_DEF: | ||
381 | default: | ||
382 | return data[2]; | ||
383 | } | ||
384 | } | ||
385 | |||
386 | static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, | ||
387 | __s32 value, __u8 *data) | ||
388 | { | ||
389 | data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | ||
390 | data[2] = min((int)abs(value), 0xff); | ||
391 | } | ||
392 | |||
393 | static struct uvc_control_mapping uvc_ctrl_mappings[] = { | ||
394 | { | ||
395 | .id = V4L2_CID_BRIGHTNESS, | ||
396 | .name = "Brightness", | ||
397 | .entity = UVC_GUID_UVC_PROCESSING, | ||
398 | .selector = UVC_PU_BRIGHTNESS_CONTROL, | ||
399 | .size = 16, | ||
400 | .offset = 0, | ||
401 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
402 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
403 | }, | ||
404 | { | ||
405 | .id = V4L2_CID_CONTRAST, | ||
406 | .name = "Contrast", | ||
407 | .entity = UVC_GUID_UVC_PROCESSING, | ||
408 | .selector = UVC_PU_CONTRAST_CONTROL, | ||
409 | .size = 16, | ||
410 | .offset = 0, | ||
411 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
412 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
413 | }, | ||
414 | { | ||
415 | .id = V4L2_CID_HUE, | ||
416 | .name = "Hue", | ||
417 | .entity = UVC_GUID_UVC_PROCESSING, | ||
418 | .selector = UVC_PU_HUE_CONTROL, | ||
419 | .size = 16, | ||
420 | .offset = 0, | ||
421 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
422 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
423 | }, | ||
424 | { | ||
425 | .id = V4L2_CID_SATURATION, | ||
426 | .name = "Saturation", | ||
427 | .entity = UVC_GUID_UVC_PROCESSING, | ||
428 | .selector = UVC_PU_SATURATION_CONTROL, | ||
429 | .size = 16, | ||
430 | .offset = 0, | ||
431 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
432 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
433 | }, | ||
434 | { | ||
435 | .id = V4L2_CID_SHARPNESS, | ||
436 | .name = "Sharpness", | ||
437 | .entity = UVC_GUID_UVC_PROCESSING, | ||
438 | .selector = UVC_PU_SHARPNESS_CONTROL, | ||
439 | .size = 16, | ||
440 | .offset = 0, | ||
441 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
442 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
443 | }, | ||
444 | { | ||
445 | .id = V4L2_CID_GAMMA, | ||
446 | .name = "Gamma", | ||
447 | .entity = UVC_GUID_UVC_PROCESSING, | ||
448 | .selector = UVC_PU_GAMMA_CONTROL, | ||
449 | .size = 16, | ||
450 | .offset = 0, | ||
451 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
452 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
453 | }, | ||
454 | { | ||
455 | .id = V4L2_CID_BACKLIGHT_COMPENSATION, | ||
456 | .name = "Backlight Compensation", | ||
457 | .entity = UVC_GUID_UVC_PROCESSING, | ||
458 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, | ||
459 | .size = 16, | ||
460 | .offset = 0, | ||
461 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
462 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
463 | }, | ||
464 | { | ||
465 | .id = V4L2_CID_GAIN, | ||
466 | .name = "Gain", | ||
467 | .entity = UVC_GUID_UVC_PROCESSING, | ||
468 | .selector = UVC_PU_GAIN_CONTROL, | ||
469 | .size = 16, | ||
470 | .offset = 0, | ||
471 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
472 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
473 | }, | ||
474 | { | ||
475 | .id = V4L2_CID_POWER_LINE_FREQUENCY, | ||
476 | .name = "Power Line Frequency", | ||
477 | .entity = UVC_GUID_UVC_PROCESSING, | ||
478 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, | ||
479 | .size = 2, | ||
480 | .offset = 0, | ||
481 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | ||
482 | .data_type = UVC_CTRL_DATA_TYPE_ENUM, | ||
483 | .menu_info = power_line_frequency_controls, | ||
484 | .menu_count = ARRAY_SIZE(power_line_frequency_controls), | ||
485 | }, | ||
486 | { | ||
487 | .id = V4L2_CID_HUE_AUTO, | ||
488 | .name = "Hue, Auto", | ||
489 | .entity = UVC_GUID_UVC_PROCESSING, | ||
490 | .selector = UVC_PU_HUE_AUTO_CONTROL, | ||
491 | .size = 1, | ||
492 | .offset = 0, | ||
493 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
494 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
495 | }, | ||
496 | { | ||
497 | .id = V4L2_CID_EXPOSURE_AUTO, | ||
498 | .name = "Exposure, Auto", | ||
499 | .entity = UVC_GUID_UVC_CAMERA, | ||
500 | .selector = UVC_CT_AE_MODE_CONTROL, | ||
501 | .size = 4, | ||
502 | .offset = 0, | ||
503 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | ||
504 | .data_type = UVC_CTRL_DATA_TYPE_BITMASK, | ||
505 | .menu_info = exposure_auto_controls, | ||
506 | .menu_count = ARRAY_SIZE(exposure_auto_controls), | ||
507 | }, | ||
508 | { | ||
509 | .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, | ||
510 | .name = "Exposure, Auto Priority", | ||
511 | .entity = UVC_GUID_UVC_CAMERA, | ||
512 | .selector = UVC_CT_AE_PRIORITY_CONTROL, | ||
513 | .size = 1, | ||
514 | .offset = 0, | ||
515 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
516 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
517 | }, | ||
518 | { | ||
519 | .id = V4L2_CID_EXPOSURE_ABSOLUTE, | ||
520 | .name = "Exposure (Absolute)", | ||
521 | .entity = UVC_GUID_UVC_CAMERA, | ||
522 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, | ||
523 | .size = 32, | ||
524 | .offset = 0, | ||
525 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
526 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
527 | }, | ||
528 | { | ||
529 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | ||
530 | .name = "White Balance Temperature, Auto", | ||
531 | .entity = UVC_GUID_UVC_PROCESSING, | ||
532 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, | ||
533 | .size = 1, | ||
534 | .offset = 0, | ||
535 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
536 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
537 | }, | ||
538 | { | ||
539 | .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, | ||
540 | .name = "White Balance Temperature", | ||
541 | .entity = UVC_GUID_UVC_PROCESSING, | ||
542 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, | ||
543 | .size = 16, | ||
544 | .offset = 0, | ||
545 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
546 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
547 | }, | ||
548 | { | ||
549 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | ||
550 | .name = "White Balance Component, Auto", | ||
551 | .entity = UVC_GUID_UVC_PROCESSING, | ||
552 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, | ||
553 | .size = 1, | ||
554 | .offset = 0, | ||
555 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
556 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
557 | }, | ||
558 | { | ||
559 | .id = V4L2_CID_BLUE_BALANCE, | ||
560 | .name = "White Balance Blue Component", | ||
561 | .entity = UVC_GUID_UVC_PROCESSING, | ||
562 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, | ||
563 | .size = 16, | ||
564 | .offset = 0, | ||
565 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
566 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
567 | }, | ||
568 | { | ||
569 | .id = V4L2_CID_RED_BALANCE, | ||
570 | .name = "White Balance Red Component", | ||
571 | .entity = UVC_GUID_UVC_PROCESSING, | ||
572 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, | ||
573 | .size = 16, | ||
574 | .offset = 16, | ||
575 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
576 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
577 | }, | ||
578 | { | ||
579 | .id = V4L2_CID_FOCUS_ABSOLUTE, | ||
580 | .name = "Focus (absolute)", | ||
581 | .entity = UVC_GUID_UVC_CAMERA, | ||
582 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, | ||
583 | .size = 16, | ||
584 | .offset = 0, | ||
585 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
586 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
587 | }, | ||
588 | { | ||
589 | .id = V4L2_CID_FOCUS_AUTO, | ||
590 | .name = "Focus, Auto", | ||
591 | .entity = UVC_GUID_UVC_CAMERA, | ||
592 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, | ||
593 | .size = 1, | ||
594 | .offset = 0, | ||
595 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
596 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
597 | }, | ||
598 | { | ||
599 | .id = V4L2_CID_IRIS_ABSOLUTE, | ||
600 | .name = "Iris, Absolute", | ||
601 | .entity = UVC_GUID_UVC_CAMERA, | ||
602 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | ||
603 | .size = 16, | ||
604 | .offset = 0, | ||
605 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
606 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
607 | }, | ||
608 | { | ||
609 | .id = V4L2_CID_IRIS_RELATIVE, | ||
610 | .name = "Iris, Relative", | ||
611 | .entity = UVC_GUID_UVC_CAMERA, | ||
612 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | ||
613 | .size = 8, | ||
614 | .offset = 0, | ||
615 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
616 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
617 | }, | ||
618 | { | ||
619 | .id = V4L2_CID_ZOOM_ABSOLUTE, | ||
620 | .name = "Zoom, Absolute", | ||
621 | .entity = UVC_GUID_UVC_CAMERA, | ||
622 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, | ||
623 | .size = 16, | ||
624 | .offset = 0, | ||
625 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
626 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
627 | }, | ||
628 | { | ||
629 | .id = V4L2_CID_ZOOM_CONTINUOUS, | ||
630 | .name = "Zoom, Continuous", | ||
631 | .entity = UVC_GUID_UVC_CAMERA, | ||
632 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, | ||
633 | .size = 0, | ||
634 | .offset = 0, | ||
635 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
636 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | ||
637 | .get = uvc_ctrl_get_zoom, | ||
638 | .set = uvc_ctrl_set_zoom, | ||
639 | }, | ||
640 | { | ||
641 | .id = V4L2_CID_PAN_ABSOLUTE, | ||
642 | .name = "Pan (Absolute)", | ||
643 | .entity = UVC_GUID_UVC_CAMERA, | ||
644 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | ||
645 | .size = 32, | ||
646 | .offset = 0, | ||
647 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
648 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
649 | }, | ||
650 | { | ||
651 | .id = V4L2_CID_TILT_ABSOLUTE, | ||
652 | .name = "Tilt (Absolute)", | ||
653 | .entity = UVC_GUID_UVC_CAMERA, | ||
654 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | ||
655 | .size = 32, | ||
656 | .offset = 32, | ||
657 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | ||
658 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | ||
659 | }, | ||
660 | { | ||
661 | .id = V4L2_CID_PRIVACY, | ||
662 | .name = "Privacy", | ||
663 | .entity = UVC_GUID_UVC_CAMERA, | ||
664 | .selector = UVC_CT_PRIVACY_CONTROL, | ||
665 | .size = 1, | ||
666 | .offset = 0, | ||
667 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | ||
668 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | ||
669 | }, | ||
670 | }; | ||
671 | |||
672 | /* ------------------------------------------------------------------------ | ||
673 | * Utility functions | ||
674 | */ | ||
675 | |||
676 | static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) | ||
677 | { | ||
678 | return ctrl->uvc_data + id * ctrl->info.size; | ||
679 | } | ||
680 | |||
681 | static inline int uvc_test_bit(const __u8 *data, int bit) | ||
682 | { | ||
683 | return (data[bit >> 3] >> (bit & 7)) & 1; | ||
684 | } | ||
685 | |||
686 | static inline void uvc_clear_bit(__u8 *data, int bit) | ||
687 | { | ||
688 | data[bit >> 3] &= ~(1 << (bit & 7)); | ||
689 | } | ||
690 | |||
691 | /* Extract the bit string specified by mapping->offset and mapping->size | ||
692 | * from the little-endian data stored at 'data' and return the result as | ||
693 | * a signed 32bit integer. Sign extension will be performed if the mapping | ||
694 | * references a signed data type. | ||
695 | */ | ||
696 | static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping, | ||
697 | __u8 query, const __u8 *data) | ||
698 | { | ||
699 | int bits = mapping->size; | ||
700 | int offset = mapping->offset; | ||
701 | __s32 value = 0; | ||
702 | __u8 mask; | ||
703 | |||
704 | data += offset / 8; | ||
705 | offset &= 7; | ||
706 | mask = ((1LL << bits) - 1) << offset; | ||
707 | |||
708 | for (; bits > 0; data++) { | ||
709 | __u8 byte = *data & mask; | ||
710 | value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); | ||
711 | bits -= 8 - (offset > 0 ? offset : 0); | ||
712 | offset -= 8; | ||
713 | mask = (1 << bits) - 1; | ||
714 | } | ||
715 | |||
716 | /* Sign-extend the value if needed. */ | ||
717 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) | ||
718 | value |= -(value & (1 << (mapping->size - 1))); | ||
719 | |||
720 | return value; | ||
721 | } | ||
722 | |||
723 | /* Set the bit string specified by mapping->offset and mapping->size | ||
724 | * in the little-endian data stored at 'data' to the value 'value'. | ||
725 | */ | ||
726 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, | ||
727 | __s32 value, __u8 *data) | ||
728 | { | ||
729 | int bits = mapping->size; | ||
730 | int offset = mapping->offset; | ||
731 | __u8 mask; | ||
732 | |||
733 | /* According to the v4l2 spec, writing any value to a button control | ||
734 | * should result in the action belonging to the button control being | ||
735 | * triggered. UVC devices however want to see a 1 written -> override | ||
736 | * value. | ||
737 | */ | ||
738 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) | ||
739 | value = -1; | ||
740 | |||
741 | data += offset / 8; | ||
742 | offset &= 7; | ||
743 | |||
744 | for (; bits > 0; data++) { | ||
745 | mask = ((1LL << bits) - 1) << offset; | ||
746 | *data = (*data & ~mask) | ((value << offset) & mask); | ||
747 | value >>= offset ? offset : 8; | ||
748 | bits -= 8 - offset; | ||
749 | offset = 0; | ||
750 | } | ||
751 | } | ||
752 | |||
753 | /* ------------------------------------------------------------------------ | ||
754 | * Terminal and unit management | ||
755 | */ | ||
756 | |||
757 | static const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; | ||
758 | static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; | ||
759 | static const __u8 uvc_media_transport_input_guid[16] = | ||
760 | UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; | ||
761 | |||
762 | static int uvc_entity_match_guid(const struct uvc_entity *entity, | ||
763 | const __u8 guid[16]) | ||
764 | { | ||
765 | switch (UVC_ENTITY_TYPE(entity)) { | ||
766 | case UVC_ITT_CAMERA: | ||
767 | return memcmp(uvc_camera_guid, guid, 16) == 0; | ||
768 | |||
769 | case UVC_ITT_MEDIA_TRANSPORT_INPUT: | ||
770 | return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; | ||
771 | |||
772 | case UVC_VC_PROCESSING_UNIT: | ||
773 | return memcmp(uvc_processing_guid, guid, 16) == 0; | ||
774 | |||
775 | case UVC_VC_EXTENSION_UNIT: | ||
776 | return memcmp(entity->extension.guidExtensionCode, | ||
777 | guid, 16) == 0; | ||
778 | |||
779 | default: | ||
780 | return 0; | ||
781 | } | ||
782 | } | ||
783 | |||
784 | /* ------------------------------------------------------------------------ | ||
785 | * UVC Controls | ||
786 | */ | ||
787 | |||
788 | static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, | ||
789 | struct uvc_control_mapping **mapping, struct uvc_control **control, | ||
790 | int next) | ||
791 | { | ||
792 | struct uvc_control *ctrl; | ||
793 | struct uvc_control_mapping *map; | ||
794 | unsigned int i; | ||
795 | |||
796 | if (entity == NULL) | ||
797 | return; | ||
798 | |||
799 | for (i = 0; i < entity->ncontrols; ++i) { | ||
800 | ctrl = &entity->controls[i]; | ||
801 | if (!ctrl->initialized) | ||
802 | continue; | ||
803 | |||
804 | list_for_each_entry(map, &ctrl->info.mappings, list) { | ||
805 | if ((map->id == v4l2_id) && !next) { | ||
806 | *control = ctrl; | ||
807 | *mapping = map; | ||
808 | return; | ||
809 | } | ||
810 | |||
811 | if ((*mapping == NULL || (*mapping)->id > map->id) && | ||
812 | (map->id > v4l2_id) && next) { | ||
813 | *control = ctrl; | ||
814 | *mapping = map; | ||
815 | } | ||
816 | } | ||
817 | } | ||
818 | } | ||
819 | |||
820 | static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, | ||
821 | __u32 v4l2_id, struct uvc_control_mapping **mapping) | ||
822 | { | ||
823 | struct uvc_control *ctrl = NULL; | ||
824 | struct uvc_entity *entity; | ||
825 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | ||
826 | |||
827 | *mapping = NULL; | ||
828 | |||
829 | /* Mask the query flags. */ | ||
830 | v4l2_id &= V4L2_CTRL_ID_MASK; | ||
831 | |||
832 | /* Find the control. */ | ||
833 | list_for_each_entry(entity, &chain->entities, chain) { | ||
834 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); | ||
835 | if (ctrl && !next) | ||
836 | return ctrl; | ||
837 | } | ||
838 | |||
839 | if (ctrl == NULL && !next) | ||
840 | uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", | ||
841 | v4l2_id); | ||
842 | |||
843 | return ctrl; | ||
844 | } | ||
845 | |||
846 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, | ||
847 | struct uvc_control *ctrl) | ||
848 | { | ||
849 | int ret; | ||
850 | |||
851 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { | ||
852 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, | ||
853 | chain->dev->intfnum, ctrl->info.selector, | ||
854 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), | ||
855 | ctrl->info.size); | ||
856 | if (ret < 0) | ||
857 | return ret; | ||
858 | } | ||
859 | |||
860 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { | ||
861 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, | ||
862 | chain->dev->intfnum, ctrl->info.selector, | ||
863 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), | ||
864 | ctrl->info.size); | ||
865 | if (ret < 0) | ||
866 | return ret; | ||
867 | } | ||
868 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { | ||
869 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, | ||
870 | chain->dev->intfnum, ctrl->info.selector, | ||
871 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), | ||
872 | ctrl->info.size); | ||
873 | if (ret < 0) | ||
874 | return ret; | ||
875 | } | ||
876 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { | ||
877 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, | ||
878 | chain->dev->intfnum, ctrl->info.selector, | ||
879 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), | ||
880 | ctrl->info.size); | ||
881 | if (ret < 0) | ||
882 | return ret; | ||
883 | } | ||
884 | |||
885 | ctrl->cached = 1; | ||
886 | return 0; | ||
887 | } | ||
888 | |||
889 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, | ||
890 | struct v4l2_queryctrl *v4l2_ctrl) | ||
891 | { | ||
892 | struct uvc_control *ctrl; | ||
893 | struct uvc_control_mapping *mapping; | ||
894 | struct uvc_menu_info *menu; | ||
895 | unsigned int i; | ||
896 | int ret; | ||
897 | |||
898 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | ||
899 | if (ret < 0) | ||
900 | return -ERESTARTSYS; | ||
901 | |||
902 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); | ||
903 | if (ctrl == NULL) { | ||
904 | ret = -EINVAL; | ||
905 | goto done; | ||
906 | } | ||
907 | |||
908 | memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); | ||
909 | v4l2_ctrl->id = mapping->id; | ||
910 | v4l2_ctrl->type = mapping->v4l2_type; | ||
911 | strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); | ||
912 | v4l2_ctrl->flags = 0; | ||
913 | |||
914 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) | ||
915 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | ||
916 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) | ||
917 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; | ||
918 | |||
919 | if (!ctrl->cached) { | ||
920 | ret = uvc_ctrl_populate_cache(chain, ctrl); | ||
921 | if (ret < 0) | ||
922 | goto done; | ||
923 | } | ||
924 | |||
925 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { | ||
926 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, | ||
927 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | ||
928 | } | ||
929 | |||
930 | switch (mapping->v4l2_type) { | ||
931 | case V4L2_CTRL_TYPE_MENU: | ||
932 | v4l2_ctrl->minimum = 0; | ||
933 | v4l2_ctrl->maximum = mapping->menu_count - 1; | ||
934 | v4l2_ctrl->step = 1; | ||
935 | |||
936 | menu = mapping->menu_info; | ||
937 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | ||
938 | if (menu->value == v4l2_ctrl->default_value) { | ||
939 | v4l2_ctrl->default_value = i; | ||
940 | break; | ||
941 | } | ||
942 | } | ||
943 | |||
944 | goto done; | ||
945 | |||
946 | case V4L2_CTRL_TYPE_BOOLEAN: | ||
947 | v4l2_ctrl->minimum = 0; | ||
948 | v4l2_ctrl->maximum = 1; | ||
949 | v4l2_ctrl->step = 1; | ||
950 | goto done; | ||
951 | |||
952 | case V4L2_CTRL_TYPE_BUTTON: | ||
953 | v4l2_ctrl->minimum = 0; | ||
954 | v4l2_ctrl->maximum = 0; | ||
955 | v4l2_ctrl->step = 0; | ||
956 | goto done; | ||
957 | |||
958 | default: | ||
959 | break; | ||
960 | } | ||
961 | |||
962 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) | ||
963 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, | ||
964 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | ||
965 | |||
966 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) | ||
967 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, | ||
968 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | ||
969 | |||
970 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) | ||
971 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, | ||
972 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | ||
973 | |||
974 | done: | ||
975 | mutex_unlock(&chain->ctrl_mutex); | ||
976 | return ret; | ||
977 | } | ||
978 | |||
979 | /* | ||
980 | * Mapping V4L2 controls to UVC controls can be straighforward if done well. | ||
981 | * Most of the UVC controls exist in V4L2, and can be mapped directly. Some | ||
982 | * must be grouped (for instance the Red Balance, Blue Balance and Do White | ||
983 | * Balance V4L2 controls use the White Balance Component UVC control) or | ||
984 | * otherwise translated. The approach we take here is to use a translation | ||
985 | * table for the controls that can be mapped directly, and handle the others | ||
986 | * manually. | ||
987 | */ | ||
988 | int uvc_query_v4l2_menu(struct uvc_video_chain *chain, | ||
989 | struct v4l2_querymenu *query_menu) | ||
990 | { | ||
991 | struct uvc_menu_info *menu_info; | ||
992 | struct uvc_control_mapping *mapping; | ||
993 | struct uvc_control *ctrl; | ||
994 | u32 index = query_menu->index; | ||
995 | u32 id = query_menu->id; | ||
996 | int ret; | ||
997 | |||
998 | memset(query_menu, 0, sizeof(*query_menu)); | ||
999 | query_menu->id = id; | ||
1000 | query_menu->index = index; | ||
1001 | |||
1002 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | ||
1003 | if (ret < 0) | ||
1004 | return -ERESTARTSYS; | ||
1005 | |||
1006 | ctrl = uvc_find_control(chain, query_menu->id, &mapping); | ||
1007 | if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { | ||
1008 | ret = -EINVAL; | ||
1009 | goto done; | ||
1010 | } | ||
1011 | |||
1012 | if (query_menu->index >= mapping->menu_count) { | ||
1013 | ret = -EINVAL; | ||
1014 | goto done; | ||
1015 | } | ||
1016 | |||
1017 | menu_info = &mapping->menu_info[query_menu->index]; | ||
1018 | |||
1019 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { | ||
1020 | s32 bitmap; | ||
1021 | |||
1022 | if (!ctrl->cached) { | ||
1023 | ret = uvc_ctrl_populate_cache(chain, ctrl); | ||
1024 | if (ret < 0) | ||
1025 | goto done; | ||
1026 | } | ||
1027 | |||
1028 | bitmap = mapping->get(mapping, UVC_GET_RES, | ||
1029 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | ||
1030 | if (!(bitmap & menu_info->value)) { | ||
1031 | ret = -EINVAL; | ||
1032 | goto done; | ||
1033 | } | ||
1034 | } | ||
1035 | |||
1036 | strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); | ||
1037 | |||
1038 | done: | ||
1039 | mutex_unlock(&chain->ctrl_mutex); | ||
1040 | return ret; | ||
1041 | } | ||
1042 | |||
1043 | |||
1044 | /* -------------------------------------------------------------------------- | ||
1045 | * Control transactions | ||
1046 | * | ||
1047 | * To make extended set operations as atomic as the hardware allows, controls | ||
1048 | * are handled using begin/commit/rollback operations. | ||
1049 | * | ||
1050 | * At the beginning of a set request, uvc_ctrl_begin should be called to | ||
1051 | * initialize the request. This function acquires the control lock. | ||
1052 | * | ||
1053 | * When setting a control, the new value is stored in the control data field | ||
1054 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | ||
1055 | * later processing. If the UVC and V4L2 control sizes differ, the current | ||
1056 | * value is loaded from the hardware before storing the new value in the data | ||
1057 | * field. | ||
1058 | * | ||
1059 | * After processing all controls in the transaction, uvc_ctrl_commit or | ||
1060 | * uvc_ctrl_rollback must be called to apply the pending changes to the | ||
1061 | * hardware or revert them. When applying changes, all controls marked as | ||
1062 | * dirty will be modified in the UVC device, and the dirty flag will be | ||
1063 | * cleared. When reverting controls, the control data field | ||
1064 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | ||
1065 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | ||
1066 | * control lock. | ||
1067 | */ | ||
1068 | int uvc_ctrl_begin(struct uvc_video_chain *chain) | ||
1069 | { | ||
1070 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; | ||
1071 | } | ||
1072 | |||
1073 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | ||
1074 | struct uvc_entity *entity, int rollback) | ||
1075 | { | ||
1076 | struct uvc_control *ctrl; | ||
1077 | unsigned int i; | ||
1078 | int ret; | ||
1079 | |||
1080 | if (entity == NULL) | ||
1081 | return 0; | ||
1082 | |||
1083 | for (i = 0; i < entity->ncontrols; ++i) { | ||
1084 | ctrl = &entity->controls[i]; | ||
1085 | if (!ctrl->initialized) | ||
1086 | continue; | ||
1087 | |||
1088 | /* Reset the loaded flag for auto-update controls that were | ||
1089 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | ||
1090 | * uvc_ctrl_get from using the cached value. | ||
1091 | */ | ||
1092 | if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE) | ||
1093 | ctrl->loaded = 0; | ||
1094 | |||
1095 | if (!ctrl->dirty) | ||
1096 | continue; | ||
1097 | |||
1098 | if (!rollback) | ||
1099 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, | ||
1100 | dev->intfnum, ctrl->info.selector, | ||
1101 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1102 | ctrl->info.size); | ||
1103 | else | ||
1104 | ret = 0; | ||
1105 | |||
1106 | if (rollback || ret < 0) | ||
1107 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1108 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | ||
1109 | ctrl->info.size); | ||
1110 | |||
1111 | ctrl->dirty = 0; | ||
1112 | |||
1113 | if (ret < 0) | ||
1114 | return ret; | ||
1115 | } | ||
1116 | |||
1117 | return 0; | ||
1118 | } | ||
1119 | |||
1120 | int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) | ||
1121 | { | ||
1122 | struct uvc_entity *entity; | ||
1123 | int ret = 0; | ||
1124 | |||
1125 | /* Find the control. */ | ||
1126 | list_for_each_entry(entity, &chain->entities, chain) { | ||
1127 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); | ||
1128 | if (ret < 0) | ||
1129 | goto done; | ||
1130 | } | ||
1131 | |||
1132 | done: | ||
1133 | mutex_unlock(&chain->ctrl_mutex); | ||
1134 | return ret; | ||
1135 | } | ||
1136 | |||
1137 | int uvc_ctrl_get(struct uvc_video_chain *chain, | ||
1138 | struct v4l2_ext_control *xctrl) | ||
1139 | { | ||
1140 | struct uvc_control *ctrl; | ||
1141 | struct uvc_control_mapping *mapping; | ||
1142 | struct uvc_menu_info *menu; | ||
1143 | unsigned int i; | ||
1144 | int ret; | ||
1145 | |||
1146 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); | ||
1147 | if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) | ||
1148 | return -EINVAL; | ||
1149 | |||
1150 | if (!ctrl->loaded) { | ||
1151 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, | ||
1152 | chain->dev->intfnum, ctrl->info.selector, | ||
1153 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1154 | ctrl->info.size); | ||
1155 | if (ret < 0) | ||
1156 | return ret; | ||
1157 | |||
1158 | ctrl->loaded = 1; | ||
1159 | } | ||
1160 | |||
1161 | xctrl->value = mapping->get(mapping, UVC_GET_CUR, | ||
1162 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | ||
1163 | |||
1164 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { | ||
1165 | menu = mapping->menu_info; | ||
1166 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | ||
1167 | if (menu->value == xctrl->value) { | ||
1168 | xctrl->value = i; | ||
1169 | break; | ||
1170 | } | ||
1171 | } | ||
1172 | } | ||
1173 | |||
1174 | return 0; | ||
1175 | } | ||
1176 | |||
1177 | int uvc_ctrl_set(struct uvc_video_chain *chain, | ||
1178 | struct v4l2_ext_control *xctrl) | ||
1179 | { | ||
1180 | struct uvc_control *ctrl; | ||
1181 | struct uvc_control_mapping *mapping; | ||
1182 | s32 value; | ||
1183 | u32 step; | ||
1184 | s32 min; | ||
1185 | s32 max; | ||
1186 | int ret; | ||
1187 | |||
1188 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); | ||
1189 | if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) == 0) | ||
1190 | return -EINVAL; | ||
1191 | |||
1192 | /* Clamp out of range values. */ | ||
1193 | switch (mapping->v4l2_type) { | ||
1194 | case V4L2_CTRL_TYPE_INTEGER: | ||
1195 | if (!ctrl->cached) { | ||
1196 | ret = uvc_ctrl_populate_cache(chain, ctrl); | ||
1197 | if (ret < 0) | ||
1198 | return ret; | ||
1199 | } | ||
1200 | |||
1201 | min = mapping->get(mapping, UVC_GET_MIN, | ||
1202 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | ||
1203 | max = mapping->get(mapping, UVC_GET_MAX, | ||
1204 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | ||
1205 | step = mapping->get(mapping, UVC_GET_RES, | ||
1206 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | ||
1207 | if (step == 0) | ||
1208 | step = 1; | ||
1209 | |||
1210 | xctrl->value = min + (xctrl->value - min + step/2) / step * step; | ||
1211 | xctrl->value = clamp(xctrl->value, min, max); | ||
1212 | value = xctrl->value; | ||
1213 | break; | ||
1214 | |||
1215 | case V4L2_CTRL_TYPE_BOOLEAN: | ||
1216 | xctrl->value = clamp(xctrl->value, 0, 1); | ||
1217 | value = xctrl->value; | ||
1218 | break; | ||
1219 | |||
1220 | case V4L2_CTRL_TYPE_MENU: | ||
1221 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | ||
1222 | return -ERANGE; | ||
1223 | value = mapping->menu_info[xctrl->value].value; | ||
1224 | |||
1225 | /* Valid menu indices are reported by the GET_RES request for | ||
1226 | * UVC controls that support it. | ||
1227 | */ | ||
1228 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { | ||
1229 | if (!ctrl->cached) { | ||
1230 | ret = uvc_ctrl_populate_cache(chain, ctrl); | ||
1231 | if (ret < 0) | ||
1232 | return ret; | ||
1233 | } | ||
1234 | |||
1235 | step = mapping->get(mapping, UVC_GET_RES, | ||
1236 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | ||
1237 | if (!(step & value)) | ||
1238 | return -ERANGE; | ||
1239 | } | ||
1240 | |||
1241 | break; | ||
1242 | |||
1243 | default: | ||
1244 | value = xctrl->value; | ||
1245 | break; | ||
1246 | } | ||
1247 | |||
1248 | /* If the mapping doesn't span the whole UVC control, the current value | ||
1249 | * needs to be loaded from the device to perform the read-modify-write | ||
1250 | * operation. | ||
1251 | */ | ||
1252 | if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) { | ||
1253 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { | ||
1254 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1255 | 0, ctrl->info.size); | ||
1256 | } else { | ||
1257 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, | ||
1258 | ctrl->entity->id, chain->dev->intfnum, | ||
1259 | ctrl->info.selector, | ||
1260 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1261 | ctrl->info.size); | ||
1262 | if (ret < 0) | ||
1263 | return ret; | ||
1264 | } | ||
1265 | |||
1266 | ctrl->loaded = 1; | ||
1267 | } | ||
1268 | |||
1269 | /* Backup the current value in case we need to rollback later. */ | ||
1270 | if (!ctrl->dirty) { | ||
1271 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | ||
1272 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | ||
1273 | ctrl->info.size); | ||
1274 | } | ||
1275 | |||
1276 | mapping->set(mapping, value, | ||
1277 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | ||
1278 | |||
1279 | ctrl->dirty = 1; | ||
1280 | ctrl->modified = 1; | ||
1281 | return 0; | ||
1282 | } | ||
1283 | |||
1284 | /* -------------------------------------------------------------------------- | ||
1285 | * Dynamic controls | ||
1286 | */ | ||
1287 | |||
1288 | static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev, | ||
1289 | const struct uvc_control *ctrl, struct uvc_control_info *info) | ||
1290 | { | ||
1291 | struct uvc_ctrl_fixup { | ||
1292 | struct usb_device_id id; | ||
1293 | u8 entity; | ||
1294 | u8 selector; | ||
1295 | u8 flags; | ||
1296 | }; | ||
1297 | |||
1298 | static const struct uvc_ctrl_fixup fixups[] = { | ||
1299 | { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1, | ||
1300 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | | ||
1301 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | ||
1302 | UVC_CTRL_FLAG_AUTO_UPDATE }, | ||
1303 | { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1, | ||
1304 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | | ||
1305 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | ||
1306 | UVC_CTRL_FLAG_AUTO_UPDATE }, | ||
1307 | { { USB_DEVICE(0x046d, 0x0994) }, 9, 1, | ||
1308 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | | ||
1309 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | ||
1310 | UVC_CTRL_FLAG_AUTO_UPDATE }, | ||
1311 | }; | ||
1312 | |||
1313 | unsigned int i; | ||
1314 | |||
1315 | for (i = 0; i < ARRAY_SIZE(fixups); ++i) { | ||
1316 | if (!usb_match_one_id(dev->intf, &fixups[i].id)) | ||
1317 | continue; | ||
1318 | |||
1319 | if (fixups[i].entity == ctrl->entity->id && | ||
1320 | fixups[i].selector == info->selector) { | ||
1321 | info->flags = fixups[i].flags; | ||
1322 | return; | ||
1323 | } | ||
1324 | } | ||
1325 | } | ||
1326 | |||
1327 | /* | ||
1328 | * Query control information (size and flags) for XU controls. | ||
1329 | */ | ||
1330 | static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, | ||
1331 | const struct uvc_control *ctrl, struct uvc_control_info *info) | ||
1332 | { | ||
1333 | u8 *data; | ||
1334 | int ret; | ||
1335 | |||
1336 | data = kmalloc(2, GFP_KERNEL); | ||
1337 | if (data == NULL) | ||
1338 | return -ENOMEM; | ||
1339 | |||
1340 | memcpy(info->entity, ctrl->entity->extension.guidExtensionCode, | ||
1341 | sizeof(info->entity)); | ||
1342 | info->index = ctrl->index; | ||
1343 | info->selector = ctrl->index + 1; | ||
1344 | |||
1345 | /* Query and verify the control length (GET_LEN) */ | ||
1346 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, | ||
1347 | info->selector, data, 2); | ||
1348 | if (ret < 0) { | ||
1349 | uvc_trace(UVC_TRACE_CONTROL, | ||
1350 | "GET_LEN failed on control %pUl/%u (%d).\n", | ||
1351 | info->entity, info->selector, ret); | ||
1352 | goto done; | ||
1353 | } | ||
1354 | |||
1355 | info->size = le16_to_cpup((__le16 *)data); | ||
1356 | |||
1357 | /* Query the control information (GET_INFO) */ | ||
1358 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, | ||
1359 | info->selector, data, 1); | ||
1360 | if (ret < 0) { | ||
1361 | uvc_trace(UVC_TRACE_CONTROL, | ||
1362 | "GET_INFO failed on control %pUl/%u (%d).\n", | ||
1363 | info->entity, info->selector, ret); | ||
1364 | goto done; | ||
1365 | } | ||
1366 | |||
1367 | info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | ||
1368 | | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF | ||
1369 | | (data[0] & UVC_CONTROL_CAP_GET ? | ||
1370 | UVC_CTRL_FLAG_GET_CUR : 0) | ||
1371 | | (data[0] & UVC_CONTROL_CAP_SET ? | ||
1372 | UVC_CTRL_FLAG_SET_CUR : 0) | ||
1373 | | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ? | ||
1374 | UVC_CTRL_FLAG_AUTO_UPDATE : 0); | ||
1375 | |||
1376 | uvc_ctrl_fixup_xu_info(dev, ctrl, info); | ||
1377 | |||
1378 | uvc_trace(UVC_TRACE_CONTROL, "XU control %pUl/%u queried: len %u, " | ||
1379 | "flags { get %u set %u auto %u }.\n", | ||
1380 | info->entity, info->selector, info->size, | ||
1381 | (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0, | ||
1382 | (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0, | ||
1383 | (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0); | ||
1384 | |||
1385 | done: | ||
1386 | kfree(data); | ||
1387 | return ret; | ||
1388 | } | ||
1389 | |||
1390 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | ||
1391 | const struct uvc_control_info *info); | ||
1392 | |||
1393 | static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev, | ||
1394 | struct uvc_control *ctrl) | ||
1395 | { | ||
1396 | struct uvc_control_info info; | ||
1397 | int ret; | ||
1398 | |||
1399 | if (ctrl->initialized) | ||
1400 | return 0; | ||
1401 | |||
1402 | ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info); | ||
1403 | if (ret < 0) | ||
1404 | return ret; | ||
1405 | |||
1406 | ret = uvc_ctrl_add_info(dev, ctrl, &info); | ||
1407 | if (ret < 0) | ||
1408 | uvc_trace(UVC_TRACE_CONTROL, "Failed to initialize control " | ||
1409 | "%pUl/%u on device %s entity %u\n", info.entity, | ||
1410 | info.selector, dev->udev->devpath, ctrl->entity->id); | ||
1411 | |||
1412 | return ret; | ||
1413 | } | ||
1414 | |||
1415 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, | ||
1416 | struct uvc_xu_control_query *xqry) | ||
1417 | { | ||
1418 | struct uvc_entity *entity; | ||
1419 | struct uvc_control *ctrl; | ||
1420 | unsigned int i, found = 0; | ||
1421 | __u32 reqflags; | ||
1422 | __u16 size; | ||
1423 | __u8 *data = NULL; | ||
1424 | int ret; | ||
1425 | |||
1426 | /* Find the extension unit. */ | ||
1427 | list_for_each_entry(entity, &chain->entities, chain) { | ||
1428 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | ||
1429 | entity->id == xqry->unit) | ||
1430 | break; | ||
1431 | } | ||
1432 | |||
1433 | if (entity->id != xqry->unit) { | ||
1434 | uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", | ||
1435 | xqry->unit); | ||
1436 | return -ENOENT; | ||
1437 | } | ||
1438 | |||
1439 | /* Find the control and perform delayed initialization if needed. */ | ||
1440 | for (i = 0; i < entity->ncontrols; ++i) { | ||
1441 | ctrl = &entity->controls[i]; | ||
1442 | if (ctrl->index == xqry->selector - 1) { | ||
1443 | found = 1; | ||
1444 | break; | ||
1445 | } | ||
1446 | } | ||
1447 | |||
1448 | if (!found) { | ||
1449 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", | ||
1450 | entity->extension.guidExtensionCode, xqry->selector); | ||
1451 | return -ENOENT; | ||
1452 | } | ||
1453 | |||
1454 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) | ||
1455 | return -ERESTARTSYS; | ||
1456 | |||
1457 | ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl); | ||
1458 | if (ret < 0) { | ||
1459 | ret = -ENOENT; | ||
1460 | goto done; | ||
1461 | } | ||
1462 | |||
1463 | /* Validate the required buffer size and flags for the request */ | ||
1464 | reqflags = 0; | ||
1465 | size = ctrl->info.size; | ||
1466 | |||
1467 | switch (xqry->query) { | ||
1468 | case UVC_GET_CUR: | ||
1469 | reqflags = UVC_CTRL_FLAG_GET_CUR; | ||
1470 | break; | ||
1471 | case UVC_GET_MIN: | ||
1472 | reqflags = UVC_CTRL_FLAG_GET_MIN; | ||
1473 | break; | ||
1474 | case UVC_GET_MAX: | ||
1475 | reqflags = UVC_CTRL_FLAG_GET_MAX; | ||
1476 | break; | ||
1477 | case UVC_GET_DEF: | ||
1478 | reqflags = UVC_CTRL_FLAG_GET_DEF; | ||
1479 | break; | ||
1480 | case UVC_GET_RES: | ||
1481 | reqflags = UVC_CTRL_FLAG_GET_RES; | ||
1482 | break; | ||
1483 | case UVC_SET_CUR: | ||
1484 | reqflags = UVC_CTRL_FLAG_SET_CUR; | ||
1485 | break; | ||
1486 | case UVC_GET_LEN: | ||
1487 | size = 2; | ||
1488 | break; | ||
1489 | case UVC_GET_INFO: | ||
1490 | size = 1; | ||
1491 | break; | ||
1492 | default: | ||
1493 | ret = -EINVAL; | ||
1494 | goto done; | ||
1495 | } | ||
1496 | |||
1497 | if (size != xqry->size) { | ||
1498 | ret = -ENOBUFS; | ||
1499 | goto done; | ||
1500 | } | ||
1501 | |||
1502 | if (reqflags && !(ctrl->info.flags & reqflags)) { | ||
1503 | ret = -EBADRQC; | ||
1504 | goto done; | ||
1505 | } | ||
1506 | |||
1507 | data = kmalloc(size, GFP_KERNEL); | ||
1508 | if (data == NULL) { | ||
1509 | ret = -ENOMEM; | ||
1510 | goto done; | ||
1511 | } | ||
1512 | |||
1513 | if (xqry->query == UVC_SET_CUR && | ||
1514 | copy_from_user(data, xqry->data, size)) { | ||
1515 | ret = -EFAULT; | ||
1516 | goto done; | ||
1517 | } | ||
1518 | |||
1519 | ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit, | ||
1520 | chain->dev->intfnum, xqry->selector, data, size); | ||
1521 | if (ret < 0) | ||
1522 | goto done; | ||
1523 | |||
1524 | if (xqry->query != UVC_SET_CUR && | ||
1525 | copy_to_user(xqry->data, data, size)) | ||
1526 | ret = -EFAULT; | ||
1527 | done: | ||
1528 | kfree(data); | ||
1529 | mutex_unlock(&chain->ctrl_mutex); | ||
1530 | return ret; | ||
1531 | } | ||
1532 | |||
1533 | /* -------------------------------------------------------------------------- | ||
1534 | * Suspend/resume | ||
1535 | */ | ||
1536 | |||
1537 | /* | ||
1538 | * Restore control values after resume, skipping controls that haven't been | ||
1539 | * changed. | ||
1540 | * | ||
1541 | * TODO | ||
1542 | * - Don't restore modified controls that are back to their default value. | ||
1543 | * - Handle restore order (Auto-Exposure Mode should be restored before | ||
1544 | * Exposure Time). | ||
1545 | */ | ||
1546 | int uvc_ctrl_resume_device(struct uvc_device *dev) | ||
1547 | { | ||
1548 | struct uvc_control *ctrl; | ||
1549 | struct uvc_entity *entity; | ||
1550 | unsigned int i; | ||
1551 | int ret; | ||
1552 | |||
1553 | /* Walk the entities list and restore controls when possible. */ | ||
1554 | list_for_each_entry(entity, &dev->entities, list) { | ||
1555 | |||
1556 | for (i = 0; i < entity->ncontrols; ++i) { | ||
1557 | ctrl = &entity->controls[i]; | ||
1558 | |||
1559 | if (!ctrl->initialized || !ctrl->modified || | ||
1560 | (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) | ||
1561 | continue; | ||
1562 | |||
1563 | printk(KERN_INFO "restoring control %pUl/%u/%u\n", | ||
1564 | ctrl->info.entity, ctrl->info.index, | ||
1565 | ctrl->info.selector); | ||
1566 | ctrl->dirty = 1; | ||
1567 | } | ||
1568 | |||
1569 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | ||
1570 | if (ret < 0) | ||
1571 | return ret; | ||
1572 | } | ||
1573 | |||
1574 | return 0; | ||
1575 | } | ||
1576 | |||
1577 | /* -------------------------------------------------------------------------- | ||
1578 | * Control and mapping handling | ||
1579 | */ | ||
1580 | |||
1581 | /* | ||
1582 | * Add control information to a given control. | ||
1583 | */ | ||
1584 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | ||
1585 | const struct uvc_control_info *info) | ||
1586 | { | ||
1587 | int ret = 0; | ||
1588 | |||
1589 | memcpy(&ctrl->info, info, sizeof(*info)); | ||
1590 | INIT_LIST_HEAD(&ctrl->info.mappings); | ||
1591 | |||
1592 | /* Allocate an array to save control values (cur, def, max, etc.) */ | ||
1593 | ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1, | ||
1594 | GFP_KERNEL); | ||
1595 | if (ctrl->uvc_data == NULL) { | ||
1596 | ret = -ENOMEM; | ||
1597 | goto done; | ||
1598 | } | ||
1599 | |||
1600 | ctrl->initialized = 1; | ||
1601 | |||
1602 | uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " | ||
1603 | "entity %u\n", ctrl->info.entity, ctrl->info.selector, | ||
1604 | dev->udev->devpath, ctrl->entity->id); | ||
1605 | |||
1606 | done: | ||
1607 | if (ret < 0) | ||
1608 | kfree(ctrl->uvc_data); | ||
1609 | return ret; | ||
1610 | } | ||
1611 | |||
1612 | /* | ||
1613 | * Add a control mapping to a given control. | ||
1614 | */ | ||
1615 | static int __uvc_ctrl_add_mapping(struct uvc_device *dev, | ||
1616 | struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) | ||
1617 | { | ||
1618 | struct uvc_control_mapping *map; | ||
1619 | unsigned int size; | ||
1620 | |||
1621 | /* Most mappings come from static kernel data and need to be duplicated. | ||
1622 | * Mappings that come from userspace will be unnecessarily duplicated, | ||
1623 | * this could be optimized. | ||
1624 | */ | ||
1625 | map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL); | ||
1626 | if (map == NULL) | ||
1627 | return -ENOMEM; | ||
1628 | |||
1629 | size = sizeof(*mapping->menu_info) * mapping->menu_count; | ||
1630 | map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); | ||
1631 | if (map->menu_info == NULL) { | ||
1632 | kfree(map); | ||
1633 | return -ENOMEM; | ||
1634 | } | ||
1635 | |||
1636 | if (map->get == NULL) | ||
1637 | map->get = uvc_get_le_value; | ||
1638 | if (map->set == NULL) | ||
1639 | map->set = uvc_set_le_value; | ||
1640 | |||
1641 | map->ctrl = &ctrl->info; | ||
1642 | list_add_tail(&map->list, &ctrl->info.mappings); | ||
1643 | uvc_trace(UVC_TRACE_CONTROL, | ||
1644 | "Adding mapping '%s' to control %pUl/%u.\n", | ||
1645 | map->name, ctrl->info.entity, ctrl->info.selector); | ||
1646 | |||
1647 | return 0; | ||
1648 | } | ||
1649 | |||
1650 | int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, | ||
1651 | const struct uvc_control_mapping *mapping) | ||
1652 | { | ||
1653 | struct uvc_device *dev = chain->dev; | ||
1654 | struct uvc_control_mapping *map; | ||
1655 | struct uvc_entity *entity; | ||
1656 | struct uvc_control *ctrl; | ||
1657 | int found = 0; | ||
1658 | int ret; | ||
1659 | |||
1660 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { | ||
1661 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control " | ||
1662 | "id 0x%08x is invalid.\n", mapping->name, | ||
1663 | mapping->id); | ||
1664 | return -EINVAL; | ||
1665 | } | ||
1666 | |||
1667 | /* Search for the matching (GUID/CS) control on the current chain */ | ||
1668 | list_for_each_entry(entity, &chain->entities, chain) { | ||
1669 | unsigned int i; | ||
1670 | |||
1671 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT || | ||
1672 | !uvc_entity_match_guid(entity, mapping->entity)) | ||
1673 | continue; | ||
1674 | |||
1675 | for (i = 0; i < entity->ncontrols; ++i) { | ||
1676 | ctrl = &entity->controls[i]; | ||
1677 | if (ctrl->index == mapping->selector - 1) { | ||
1678 | found = 1; | ||
1679 | break; | ||
1680 | } | ||
1681 | } | ||
1682 | |||
1683 | if (found) | ||
1684 | break; | ||
1685 | } | ||
1686 | if (!found) | ||
1687 | return -ENOENT; | ||
1688 | |||
1689 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) | ||
1690 | return -ERESTARTSYS; | ||
1691 | |||
1692 | /* Perform delayed initialization of XU controls */ | ||
1693 | ret = uvc_ctrl_init_xu_ctrl(dev, ctrl); | ||
1694 | if (ret < 0) { | ||
1695 | ret = -ENOENT; | ||
1696 | goto done; | ||
1697 | } | ||
1698 | |||
1699 | list_for_each_entry(map, &ctrl->info.mappings, list) { | ||
1700 | if (mapping->id == map->id) { | ||
1701 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', " | ||
1702 | "control id 0x%08x already exists.\n", | ||
1703 | mapping->name, mapping->id); | ||
1704 | ret = -EEXIST; | ||
1705 | goto done; | ||
1706 | } | ||
1707 | } | ||
1708 | |||
1709 | /* Prevent excess memory consumption */ | ||
1710 | if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) { | ||
1711 | atomic_dec(&dev->nmappings); | ||
1712 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum " | ||
1713 | "mappings count (%u) exceeded.\n", mapping->name, | ||
1714 | UVC_MAX_CONTROL_MAPPINGS); | ||
1715 | ret = -ENOMEM; | ||
1716 | goto done; | ||
1717 | } | ||
1718 | |||
1719 | ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping); | ||
1720 | if (ret < 0) | ||
1721 | atomic_dec(&dev->nmappings); | ||
1722 | |||
1723 | done: | ||
1724 | mutex_unlock(&chain->ctrl_mutex); | ||
1725 | return ret; | ||
1726 | } | ||
1727 | |||
1728 | /* | ||
1729 | * Prune an entity of its bogus controls using a blacklist. Bogus controls | ||
1730 | * are currently the ones that crash the camera or unconditionally return an | ||
1731 | * error when queried. | ||
1732 | */ | ||
1733 | static void uvc_ctrl_prune_entity(struct uvc_device *dev, | ||
1734 | struct uvc_entity *entity) | ||
1735 | { | ||
1736 | struct uvc_ctrl_blacklist { | ||
1737 | struct usb_device_id id; | ||
1738 | u8 index; | ||
1739 | }; | ||
1740 | |||
1741 | static const struct uvc_ctrl_blacklist processing_blacklist[] = { | ||
1742 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ | ||
1743 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ | ||
1744 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | ||
1745 | }; | ||
1746 | static const struct uvc_ctrl_blacklist camera_blacklist[] = { | ||
1747 | { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */ | ||
1748 | }; | ||
1749 | |||
1750 | const struct uvc_ctrl_blacklist *blacklist; | ||
1751 | unsigned int size; | ||
1752 | unsigned int count; | ||
1753 | unsigned int i; | ||
1754 | u8 *controls; | ||
1755 | |||
1756 | switch (UVC_ENTITY_TYPE(entity)) { | ||
1757 | case UVC_VC_PROCESSING_UNIT: | ||
1758 | blacklist = processing_blacklist; | ||
1759 | count = ARRAY_SIZE(processing_blacklist); | ||
1760 | controls = entity->processing.bmControls; | ||
1761 | size = entity->processing.bControlSize; | ||
1762 | break; | ||
1763 | |||
1764 | case UVC_ITT_CAMERA: | ||
1765 | blacklist = camera_blacklist; | ||
1766 | count = ARRAY_SIZE(camera_blacklist); | ||
1767 | controls = entity->camera.bmControls; | ||
1768 | size = entity->camera.bControlSize; | ||
1769 | break; | ||
1770 | |||
1771 | default: | ||
1772 | return; | ||
1773 | } | ||
1774 | |||
1775 | for (i = 0; i < count; ++i) { | ||
1776 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) | ||
1777 | continue; | ||
1778 | |||
1779 | if (blacklist[i].index >= 8 * size || | ||
1780 | !uvc_test_bit(controls, blacklist[i].index)) | ||
1781 | continue; | ||
1782 | |||
1783 | uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, " | ||
1784 | "removing it.\n", entity->id, blacklist[i].index); | ||
1785 | |||
1786 | uvc_clear_bit(controls, blacklist[i].index); | ||
1787 | } | ||
1788 | } | ||
1789 | |||
1790 | /* | ||
1791 | * Add control information and hardcoded stock control mappings to the given | ||
1792 | * device. | ||
1793 | */ | ||
1794 | static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) | ||
1795 | { | ||
1796 | const struct uvc_control_info *info = uvc_ctrls; | ||
1797 | const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls); | ||
1798 | const struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | ||
1799 | const struct uvc_control_mapping *mend = | ||
1800 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | ||
1801 | |||
1802 | /* XU controls initialization requires querying the device for control | ||
1803 | * information. As some buggy UVC devices will crash when queried | ||
1804 | * repeatedly in a tight loop, delay XU controls initialization until | ||
1805 | * first use. | ||
1806 | */ | ||
1807 | if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT) | ||
1808 | return; | ||
1809 | |||
1810 | for (; info < iend; ++info) { | ||
1811 | if (uvc_entity_match_guid(ctrl->entity, info->entity) && | ||
1812 | ctrl->index == info->index) { | ||
1813 | uvc_ctrl_add_info(dev, ctrl, info); | ||
1814 | break; | ||
1815 | } | ||
1816 | } | ||
1817 | |||
1818 | if (!ctrl->initialized) | ||
1819 | return; | ||
1820 | |||
1821 | for (; mapping < mend; ++mapping) { | ||
1822 | if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && | ||
1823 | ctrl->info.selector == mapping->selector) | ||
1824 | __uvc_ctrl_add_mapping(dev, ctrl, mapping); | ||
1825 | } | ||
1826 | } | ||
1827 | |||
1828 | /* | ||
1829 | * Initialize device controls. | ||
1830 | */ | ||
1831 | int uvc_ctrl_init_device(struct uvc_device *dev) | ||
1832 | { | ||
1833 | struct uvc_entity *entity; | ||
1834 | unsigned int i; | ||
1835 | |||
1836 | /* Walk the entities list and instantiate controls */ | ||
1837 | list_for_each_entry(entity, &dev->entities, list) { | ||
1838 | struct uvc_control *ctrl; | ||
1839 | unsigned int bControlSize = 0, ncontrols = 0; | ||
1840 | __u8 *bmControls = NULL; | ||
1841 | |||
1842 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { | ||
1843 | bmControls = entity->extension.bmControls; | ||
1844 | bControlSize = entity->extension.bControlSize; | ||
1845 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { | ||
1846 | bmControls = entity->processing.bmControls; | ||
1847 | bControlSize = entity->processing.bControlSize; | ||
1848 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { | ||
1849 | bmControls = entity->camera.bmControls; | ||
1850 | bControlSize = entity->camera.bControlSize; | ||
1851 | } | ||
1852 | |||
1853 | /* Remove bogus/blacklisted controls */ | ||
1854 | uvc_ctrl_prune_entity(dev, entity); | ||
1855 | |||
1856 | /* Count supported controls and allocate the controls array */ | ||
1857 | for (i = 0; i < bControlSize; ++i) | ||
1858 | ncontrols += hweight8(bmControls[i]); | ||
1859 | if (ncontrols == 0) | ||
1860 | continue; | ||
1861 | |||
1862 | entity->controls = kzalloc(ncontrols * sizeof(*ctrl), | ||
1863 | GFP_KERNEL); | ||
1864 | if (entity->controls == NULL) | ||
1865 | return -ENOMEM; | ||
1866 | entity->ncontrols = ncontrols; | ||
1867 | |||
1868 | /* Initialize all supported controls */ | ||
1869 | ctrl = entity->controls; | ||
1870 | for (i = 0; i < bControlSize * 8; ++i) { | ||
1871 | if (uvc_test_bit(bmControls, i) == 0) | ||
1872 | continue; | ||
1873 | |||
1874 | ctrl->entity = entity; | ||
1875 | ctrl->index = i; | ||
1876 | |||
1877 | uvc_ctrl_init_ctrl(dev, ctrl); | ||
1878 | ctrl++; | ||
1879 | } | ||
1880 | } | ||
1881 | |||
1882 | return 0; | ||
1883 | } | ||
1884 | |||
1885 | /* | ||
1886 | * Cleanup device controls. | ||
1887 | */ | ||
1888 | static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, | ||
1889 | struct uvc_control *ctrl) | ||
1890 | { | ||
1891 | struct uvc_control_mapping *mapping, *nm; | ||
1892 | |||
1893 | list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { | ||
1894 | list_del(&mapping->list); | ||
1895 | kfree(mapping->menu_info); | ||
1896 | kfree(mapping); | ||
1897 | } | ||
1898 | } | ||
1899 | |||
1900 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) | ||
1901 | { | ||
1902 | struct uvc_entity *entity; | ||
1903 | unsigned int i; | ||
1904 | |||
1905 | /* Free controls and control mappings for all entities. */ | ||
1906 | list_for_each_entry(entity, &dev->entities, list) { | ||
1907 | for (i = 0; i < entity->ncontrols; ++i) { | ||
1908 | struct uvc_control *ctrl = &entity->controls[i]; | ||
1909 | |||
1910 | if (!ctrl->initialized) | ||
1911 | continue; | ||
1912 | |||
1913 | uvc_ctrl_cleanup_mappings(dev, ctrl); | ||
1914 | kfree(ctrl->uvc_data); | ||
1915 | } | ||
1916 | |||
1917 | kfree(entity->controls); | ||
1918 | } | ||
1919 | } | ||