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Commit | Line | Data |
---|---|---|
c0efd232 LP |
1 | /* |
2 | * uvc_ctrl.c -- USB Video Class driver - Controls | |
3 | * | |
11fc5baf LP |
4 | * Copyright (C) 2005-2010 |
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
c0efd232 LP |
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> | |
c0efd232 LP |
15 | #include <linux/list.h> |
16 | #include <linux/module.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
c0efd232 LP |
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> | |
60063497 | 23 | #include <linux/atomic.h> |
b4012002 | 24 | #include <media/v4l2-ctrls.h> |
c0efd232 LP |
25 | |
26 | #include "uvcvideo.h" | |
27 | ||
c0efd232 LP |
28 | #define UVC_CTRL_DATA_CURRENT 0 |
29 | #define UVC_CTRL_DATA_BACKUP 1 | |
59529081 LP |
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 | |
c0efd232 LP |
35 | |
36 | /* ------------------------------------------------------------------------ | |
2c2d264b | 37 | * Controls |
c0efd232 LP |
38 | */ |
39 | ||
40 | static struct uvc_control_info uvc_ctrls[] = { | |
41 | { | |
42 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 43 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
44 | .index = 0, |
45 | .size = 2, | |
9eb30d2f LP |
46 | .flags = UVC_CTRL_FLAG_SET_CUR |
47 | | UVC_CTRL_FLAG_GET_RANGE | |
48 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
49 | }, |
50 | { | |
51 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 52 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
53 | .index = 1, |
54 | .size = 2, | |
9eb30d2f LP |
55 | .flags = UVC_CTRL_FLAG_SET_CUR |
56 | | UVC_CTRL_FLAG_GET_RANGE | |
57 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
58 | }, |
59 | { | |
60 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 61 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
62 | .index = 2, |
63 | .size = 2, | |
9eb30d2f LP |
64 | .flags = UVC_CTRL_FLAG_SET_CUR |
65 | | UVC_CTRL_FLAG_GET_RANGE | |
66 | | UVC_CTRL_FLAG_RESTORE | |
67 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
68 | }, |
69 | { | |
70 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 71 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
72 | .index = 3, |
73 | .size = 2, | |
9eb30d2f LP |
74 | .flags = UVC_CTRL_FLAG_SET_CUR |
75 | | UVC_CTRL_FLAG_GET_RANGE | |
76 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
77 | }, |
78 | { | |
79 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 80 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
81 | .index = 4, |
82 | .size = 2, | |
9eb30d2f LP |
83 | .flags = UVC_CTRL_FLAG_SET_CUR |
84 | | UVC_CTRL_FLAG_GET_RANGE | |
85 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
86 | }, |
87 | { | |
88 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 89 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
90 | .index = 5, |
91 | .size = 2, | |
9eb30d2f LP |
92 | .flags = UVC_CTRL_FLAG_SET_CUR |
93 | | UVC_CTRL_FLAG_GET_RANGE | |
94 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 | 95 | }, |
5e26d50f LP |
96 | { |
97 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 98 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
5e26d50f LP |
99 | .index = 6, |
100 | .size = 2, | |
9eb30d2f LP |
101 | .flags = UVC_CTRL_FLAG_SET_CUR |
102 | | UVC_CTRL_FLAG_GET_RANGE | |
103 | | UVC_CTRL_FLAG_RESTORE | |
104 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
105 | }, |
106 | { | |
107 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 108 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
5e26d50f LP |
109 | .index = 7, |
110 | .size = 4, | |
9eb30d2f LP |
111 | .flags = UVC_CTRL_FLAG_SET_CUR |
112 | | UVC_CTRL_FLAG_GET_RANGE | |
113 | | UVC_CTRL_FLAG_RESTORE | |
114 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f | 115 | }, |
c0efd232 LP |
116 | { |
117 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 118 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
119 | .index = 8, |
120 | .size = 2, | |
9eb30d2f LP |
121 | .flags = UVC_CTRL_FLAG_SET_CUR |
122 | | UVC_CTRL_FLAG_GET_RANGE | |
123 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
124 | }, |
125 | { | |
126 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 127 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
128 | .index = 9, |
129 | .size = 2, | |
9eb30d2f LP |
130 | .flags = UVC_CTRL_FLAG_SET_CUR |
131 | | UVC_CTRL_FLAG_GET_RANGE | |
132 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
133 | }, |
134 | { | |
135 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 136 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
137 | .index = 10, |
138 | .size = 1, | |
9eb30d2f LP |
139 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
140 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
141 | }, |
142 | { | |
143 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 144 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
145 | .index = 11, |
146 | .size = 1, | |
9eb30d2f LP |
147 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
148 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 | 149 | }, |
5e26d50f LP |
150 | { |
151 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 152 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
5e26d50f LP |
153 | .index = 12, |
154 | .size = 1, | |
9eb30d2f LP |
155 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
156 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
157 | }, |
158 | { | |
159 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 160 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
5e26d50f LP |
161 | .index = 13, |
162 | .size = 1, | |
9eb30d2f LP |
163 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
164 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
165 | }, |
166 | { | |
167 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 168 | .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL, |
5e26d50f LP |
169 | .index = 14, |
170 | .size = 2, | |
9eb30d2f LP |
171 | .flags = UVC_CTRL_FLAG_SET_CUR |
172 | | UVC_CTRL_FLAG_GET_RANGE | |
173 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
174 | }, |
175 | { | |
176 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 177 | .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL, |
5e26d50f LP |
178 | .index = 15, |
179 | .size = 2, | |
9eb30d2f LP |
180 | .flags = UVC_CTRL_FLAG_SET_CUR |
181 | | UVC_CTRL_FLAG_GET_RANGE | |
182 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
183 | }, |
184 | { | |
185 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 186 | .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL, |
5e26d50f LP |
187 | .index = 16, |
188 | .size = 1, | |
9eb30d2f | 189 | .flags = UVC_CTRL_FLAG_GET_CUR, |
5e26d50f LP |
190 | }, |
191 | { | |
192 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 193 | .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL, |
5e26d50f LP |
194 | .index = 17, |
195 | .size = 1, | |
9eb30d2f | 196 | .flags = UVC_CTRL_FLAG_GET_CUR, |
5e26d50f LP |
197 | }, |
198 | { | |
199 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 200 | .selector = UVC_CT_SCANNING_MODE_CONTROL, |
5e26d50f LP |
201 | .index = 0, |
202 | .size = 1, | |
9eb30d2f LP |
203 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
204 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f | 205 | }, |
c0efd232 LP |
206 | { |
207 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 208 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
209 | .index = 1, |
210 | .size = 1, | |
9eb30d2f LP |
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, | |
c0efd232 LP |
214 | }, |
215 | { | |
216 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 217 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
218 | .index = 2, |
219 | .size = 1, | |
9eb30d2f LP |
220 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
221 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
222 | }, |
223 | { | |
224 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 225 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
226 | .index = 3, |
227 | .size = 4, | |
9eb30d2f LP |
228 | .flags = UVC_CTRL_FLAG_SET_CUR |
229 | | UVC_CTRL_FLAG_GET_RANGE | |
230 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 | 231 | }, |
5e26d50f LP |
232 | { |
233 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 234 | .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL, |
5e26d50f LP |
235 | .index = 4, |
236 | .size = 1, | |
9eb30d2f | 237 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE, |
5e26d50f | 238 | }, |
c0efd232 LP |
239 | { |
240 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 241 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
242 | .index = 5, |
243 | .size = 2, | |
9eb30d2f LP |
244 | .flags = UVC_CTRL_FLAG_SET_CUR |
245 | | UVC_CTRL_FLAG_GET_RANGE | |
246 | | UVC_CTRL_FLAG_RESTORE | |
247 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
248 | }, |
249 | { | |
250 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 251 | .selector = UVC_CT_FOCUS_RELATIVE_CONTROL, |
5e26d50f LP |
252 | .index = 6, |
253 | .size = 2, | |
9eb30d2f LP |
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, | |
c0efd232 LP |
258 | }, |
259 | { | |
5e26d50f | 260 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 261 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, |
5e26d50f LP |
262 | .index = 7, |
263 | .size = 2, | |
9eb30d2f LP |
264 | .flags = UVC_CTRL_FLAG_SET_CUR |
265 | | UVC_CTRL_FLAG_GET_RANGE | |
266 | | UVC_CTRL_FLAG_RESTORE | |
267 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
268 | }, |
269 | { | |
270 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 271 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, |
5e26d50f | 272 | .index = 8, |
c0efd232 | 273 | .size = 1, |
9eb30d2f LP |
274 | .flags = UVC_CTRL_FLAG_SET_CUR |
275 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
276 | }, |
277 | { | |
5e26d50f | 278 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 279 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
5e26d50f | 280 | .index = 9, |
c0efd232 | 281 | .size = 2, |
9eb30d2f LP |
282 | .flags = UVC_CTRL_FLAG_SET_CUR |
283 | | UVC_CTRL_FLAG_GET_RANGE | |
284 | | UVC_CTRL_FLAG_RESTORE | |
285 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
286 | }, |
287 | { | |
5e26d50f | 288 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 289 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
5e26d50f LP |
290 | .index = 10, |
291 | .size = 3, | |
9eb30d2f LP |
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, | |
5e26d50f LP |
296 | }, |
297 | { | |
298 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 299 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, |
5e26d50f LP |
300 | .index = 11, |
301 | .size = 8, | |
9eb30d2f LP |
302 | .flags = UVC_CTRL_FLAG_SET_CUR |
303 | | UVC_CTRL_FLAG_GET_RANGE | |
304 | | UVC_CTRL_FLAG_RESTORE | |
305 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
306 | }, |
307 | { | |
308 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 309 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, |
5e26d50f LP |
310 | .index = 12, |
311 | .size = 4, | |
9eb30d2f LP |
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, | |
5e26d50f LP |
316 | }, |
317 | { | |
318 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 319 | .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL, |
c0efd232 | 320 | .index = 13, |
5e26d50f | 321 | .size = 2, |
9eb30d2f LP |
322 | .flags = UVC_CTRL_FLAG_SET_CUR |
323 | | UVC_CTRL_FLAG_GET_RANGE | |
324 | | UVC_CTRL_FLAG_RESTORE | |
325 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
326 | }, |
327 | { | |
328 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 329 | .selector = UVC_CT_ROLL_RELATIVE_CONTROL, |
5e26d50f LP |
330 | .index = 14, |
331 | .size = 2, | |
9eb30d2f LP |
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, | |
5e26d50f LP |
336 | }, |
337 | { | |
338 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 339 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
5e26d50f | 340 | .index = 17, |
c0efd232 | 341 | .size = 1, |
9eb30d2f LP |
342 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
343 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
344 | }, |
345 | { | |
5e26d50f | 346 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 347 | .selector = UVC_CT_PRIVACY_CONTROL, |
5e26d50f LP |
348 | .index = 18, |
349 | .size = 1, | |
9eb30d2f LP |
350 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
351 | | UVC_CTRL_FLAG_RESTORE | |
352 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
353 | }, |
354 | }; | |
355 | ||
356 | static struct uvc_menu_info power_line_frequency_controls[] = { | |
357 | { 0, "Disabled" }, | |
358 | { 1, "50 Hz" }, | |
359 | { 2, "60 Hz" }, | |
360 | }; | |
361 | ||
362 | static struct uvc_menu_info exposure_auto_controls[] = { | |
c0efd232 | 363 | { 2, "Auto Mode" }, |
90ac5ea3 | 364 | { 1, "Manual Mode" }, |
c0efd232 LP |
365 | { 4, "Shutter Priority Mode" }, |
366 | { 8, "Aperture Priority Mode" }, | |
367 | }; | |
368 | ||
9768352a LP |
369 | static __s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, |
370 | __u8 query, const __u8 *data) | |
371 | { | |
372 | __s8 zoom = (__s8)data[0]; | |
373 | ||
374 | switch (query) { | |
b482d923 | 375 | case UVC_GET_CUR: |
9768352a LP |
376 | return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); |
377 | ||
b482d923 LP |
378 | case UVC_GET_MIN: |
379 | case UVC_GET_MAX: | |
380 | case UVC_GET_RES: | |
381 | case UVC_GET_DEF: | |
9768352a LP |
382 | default: |
383 | return data[2]; | |
384 | } | |
385 | } | |
386 | ||
387 | static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, | |
388 | __s32 value, __u8 *data) | |
389 | { | |
390 | data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
2e896133 | 391 | data[2] = min((int)abs(value), 0xff); |
9768352a LP |
392 | } |
393 | ||
c0efd232 LP |
394 | static struct uvc_control_mapping uvc_ctrl_mappings[] = { |
395 | { | |
396 | .id = V4L2_CID_BRIGHTNESS, | |
397 | .name = "Brightness", | |
398 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 399 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
400 | .size = 16, |
401 | .offset = 0, | |
402 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
403 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
404 | }, | |
405 | { | |
406 | .id = V4L2_CID_CONTRAST, | |
407 | .name = "Contrast", | |
408 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 409 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
410 | .size = 16, |
411 | .offset = 0, | |
412 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
413 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
414 | }, | |
415 | { | |
416 | .id = V4L2_CID_HUE, | |
417 | .name = "Hue", | |
418 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 419 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
420 | .size = 16, |
421 | .offset = 0, | |
422 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
423 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
424 | .master_id = V4L2_CID_HUE_AUTO, |
425 | .master_manual = 0, | |
c0efd232 LP |
426 | }, |
427 | { | |
428 | .id = V4L2_CID_SATURATION, | |
429 | .name = "Saturation", | |
430 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 431 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
432 | .size = 16, |
433 | .offset = 0, | |
434 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
435 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
436 | }, | |
437 | { | |
438 | .id = V4L2_CID_SHARPNESS, | |
439 | .name = "Sharpness", | |
440 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 441 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
442 | .size = 16, |
443 | .offset = 0, | |
444 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
445 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
446 | }, | |
447 | { | |
448 | .id = V4L2_CID_GAMMA, | |
449 | .name = "Gamma", | |
450 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 451 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
452 | .size = 16, |
453 | .offset = 0, | |
454 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
455 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
456 | }, | |
457 | { | |
458 | .id = V4L2_CID_BACKLIGHT_COMPENSATION, | |
459 | .name = "Backlight Compensation", | |
460 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 461 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
462 | .size = 16, |
463 | .offset = 0, | |
464 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
465 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
466 | }, | |
467 | { | |
468 | .id = V4L2_CID_GAIN, | |
469 | .name = "Gain", | |
470 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 471 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
472 | .size = 16, |
473 | .offset = 0, | |
474 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
475 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
476 | }, | |
477 | { | |
478 | .id = V4L2_CID_POWER_LINE_FREQUENCY, | |
479 | .name = "Power Line Frequency", | |
480 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 481 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
482 | .size = 2, |
483 | .offset = 0, | |
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), | |
488 | }, | |
489 | { | |
490 | .id = V4L2_CID_HUE_AUTO, | |
491 | .name = "Hue, Auto", | |
492 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 493 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
494 | .size = 1, |
495 | .offset = 0, | |
496 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
497 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 498 | .slave_ids = { V4L2_CID_HUE, }, |
c0efd232 LP |
499 | }, |
500 | { | |
501 | .id = V4L2_CID_EXPOSURE_AUTO, | |
502 | .name = "Exposure, Auto", | |
503 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 504 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
505 | .size = 4, |
506 | .offset = 0, | |
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), | |
55afeb8a | 511 | .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, |
c0efd232 LP |
512 | }, |
513 | { | |
514 | .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, | |
515 | .name = "Exposure, Auto Priority", | |
516 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 517 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
518 | .size = 1, |
519 | .offset = 0, | |
520 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
521 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
522 | }, | |
523 | { | |
524 | .id = V4L2_CID_EXPOSURE_ABSOLUTE, | |
525 | .name = "Exposure (Absolute)", | |
526 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 527 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
528 | .size = 32, |
529 | .offset = 0, | |
530 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
531 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
532 | .master_id = V4L2_CID_EXPOSURE_AUTO, |
533 | .master_manual = V4L2_EXPOSURE_MANUAL, | |
c0efd232 LP |
534 | }, |
535 | { | |
536 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
537 | .name = "White Balance Temperature, Auto", | |
538 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 539 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
c0efd232 LP |
540 | .size = 1, |
541 | .offset = 0, | |
542 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
543 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 544 | .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, |
c0efd232 LP |
545 | }, |
546 | { | |
547 | .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, | |
548 | .name = "White Balance Temperature", | |
549 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 550 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
c0efd232 LP |
551 | .size = 16, |
552 | .offset = 0, | |
553 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
554 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
555 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
556 | .master_manual = 0, | |
c0efd232 LP |
557 | }, |
558 | { | |
559 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
560 | .name = "White Balance Component, Auto", | |
561 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 562 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
c0efd232 LP |
563 | .size = 1, |
564 | .offset = 0, | |
565 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
566 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a HG |
567 | .slave_ids = { V4L2_CID_BLUE_BALANCE, |
568 | V4L2_CID_RED_BALANCE }, | |
c0efd232 LP |
569 | }, |
570 | { | |
571 | .id = V4L2_CID_BLUE_BALANCE, | |
572 | .name = "White Balance Blue Component", | |
573 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 574 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
575 | .size = 16, |
576 | .offset = 0, | |
577 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
578 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
579 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
580 | .master_manual = 0, | |
c0efd232 LP |
581 | }, |
582 | { | |
583 | .id = V4L2_CID_RED_BALANCE, | |
584 | .name = "White Balance Red Component", | |
585 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 586 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
587 | .size = 16, |
588 | .offset = 16, | |
589 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
590 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
591 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
592 | .master_manual = 0, | |
c0efd232 LP |
593 | }, |
594 | { | |
595 | .id = V4L2_CID_FOCUS_ABSOLUTE, | |
596 | .name = "Focus (absolute)", | |
597 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 598 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
599 | .size = 16, |
600 | .offset = 0, | |
601 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
602 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
603 | .master_id = V4L2_CID_FOCUS_AUTO, |
604 | .master_manual = 0, | |
c0efd232 LP |
605 | }, |
606 | { | |
607 | .id = V4L2_CID_FOCUS_AUTO, | |
608 | .name = "Focus, Auto", | |
609 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 610 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
c0efd232 LP |
611 | .size = 1, |
612 | .offset = 0, | |
613 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
614 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 615 | .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, |
c0efd232 | 616 | }, |
35a00c41 LP |
617 | { |
618 | .id = V4L2_CID_IRIS_ABSOLUTE, | |
619 | .name = "Iris, Absolute", | |
620 | .entity = UVC_GUID_UVC_CAMERA, | |
621 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | |
622 | .size = 16, | |
623 | .offset = 0, | |
624 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
625 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
626 | }, | |
627 | { | |
628 | .id = V4L2_CID_IRIS_RELATIVE, | |
629 | .name = "Iris, Relative", | |
630 | .entity = UVC_GUID_UVC_CAMERA, | |
631 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | |
632 | .size = 8, | |
633 | .offset = 0, | |
634 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
635 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
636 | }, | |
9768352a LP |
637 | { |
638 | .id = V4L2_CID_ZOOM_ABSOLUTE, | |
639 | .name = "Zoom, Absolute", | |
640 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 641 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
9768352a LP |
642 | .size = 16, |
643 | .offset = 0, | |
644 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
645 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
646 | }, | |
647 | { | |
648 | .id = V4L2_CID_ZOOM_CONTINUOUS, | |
649 | .name = "Zoom, Continuous", | |
650 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 651 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
9768352a LP |
652 | .size = 0, |
653 | .offset = 0, | |
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, | |
658 | }, | |
e56be916 MR |
659 | { |
660 | .id = V4L2_CID_PAN_ABSOLUTE, | |
661 | .name = "Pan (Absolute)", | |
662 | .entity = UVC_GUID_UVC_CAMERA, | |
663 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
664 | .size = 32, | |
665 | .offset = 0, | |
666 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
667 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
668 | }, | |
669 | { | |
670 | .id = V4L2_CID_TILT_ABSOLUTE, | |
671 | .name = "Tilt (Absolute)", | |
672 | .entity = UVC_GUID_UVC_CAMERA, | |
673 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
674 | .size = 32, | |
675 | .offset = 32, | |
676 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
677 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
678 | }, | |
6df126f8 LP |
679 | { |
680 | .id = V4L2_CID_PRIVACY, | |
681 | .name = "Privacy", | |
682 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 683 | .selector = UVC_CT_PRIVACY_CONTROL, |
6df126f8 LP |
684 | .size = 1, |
685 | .offset = 0, | |
686 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
687 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
688 | }, | |
c0efd232 LP |
689 | }; |
690 | ||
691 | /* ------------------------------------------------------------------------ | |
692 | * Utility functions | |
693 | */ | |
694 | ||
695 | static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) | |
696 | { | |
071c8bb8 | 697 | return ctrl->uvc_data + id * ctrl->info.size; |
c0efd232 LP |
698 | } |
699 | ||
2bdd29cf | 700 | static inline int uvc_test_bit(const __u8 *data, int bit) |
c0efd232 LP |
701 | { |
702 | return (data[bit >> 3] >> (bit & 7)) & 1; | |
703 | } | |
704 | ||
2bdd29cf LP |
705 | static inline void uvc_clear_bit(__u8 *data, int bit) |
706 | { | |
707 | data[bit >> 3] &= ~(1 << (bit & 7)); | |
708 | } | |
709 | ||
c0efd232 LP |
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. | |
714 | */ | |
9768352a LP |
715 | static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping, |
716 | __u8 query, const __u8 *data) | |
c0efd232 LP |
717 | { |
718 | int bits = mapping->size; | |
719 | int offset = mapping->offset; | |
720 | __s32 value = 0; | |
721 | __u8 mask; | |
722 | ||
723 | data += offset / 8; | |
724 | offset &= 7; | |
725 | mask = ((1LL << bits) - 1) << offset; | |
726 | ||
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); | |
731 | offset -= 8; | |
732 | mask = (1 << bits) - 1; | |
733 | } | |
734 | ||
2c2d264b | 735 | /* Sign-extend the value if needed. */ |
c0efd232 LP |
736 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
737 | value |= -(value & (1 << (mapping->size - 1))); | |
738 | ||
739 | return value; | |
740 | } | |
741 | ||
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'. | |
744 | */ | |
9768352a LP |
745 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, |
746 | __s32 value, __u8 *data) | |
c0efd232 LP |
747 | { |
748 | int bits = mapping->size; | |
749 | int offset = mapping->offset; | |
750 | __u8 mask; | |
751 | ||
3653639e HG |
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 | |
755 | * value. | |
756 | */ | |
757 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) | |
758 | value = -1; | |
759 | ||
c0efd232 LP |
760 | data += offset / 8; |
761 | offset &= 7; | |
762 | ||
763 | for (; bits > 0; data++) { | |
764 | mask = ((1LL << bits) - 1) << offset; | |
765 | *data = (*data & ~mask) | ((value << offset) & mask); | |
766 | value >>= offset ? offset : 8; | |
767 | bits -= 8 - offset; | |
768 | offset = 0; | |
769 | } | |
770 | } | |
771 | ||
772 | /* ------------------------------------------------------------------------ | |
773 | * Terminal and unit management | |
774 | */ | |
775 | ||
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; | |
780 | ||
f9d81df9 LP |
781 | static int uvc_entity_match_guid(const struct uvc_entity *entity, |
782 | const __u8 guid[16]) | |
c0efd232 LP |
783 | { |
784 | switch (UVC_ENTITY_TYPE(entity)) { | |
b482d923 | 785 | case UVC_ITT_CAMERA: |
c0efd232 LP |
786 | return memcmp(uvc_camera_guid, guid, 16) == 0; |
787 | ||
b482d923 | 788 | case UVC_ITT_MEDIA_TRANSPORT_INPUT: |
c0efd232 LP |
789 | return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
790 | ||
b482d923 | 791 | case UVC_VC_PROCESSING_UNIT: |
c0efd232 LP |
792 | return memcmp(uvc_processing_guid, guid, 16) == 0; |
793 | ||
b482d923 | 794 | case UVC_VC_EXTENSION_UNIT: |
c0efd232 LP |
795 | return memcmp(entity->extension.guidExtensionCode, |
796 | guid, 16) == 0; | |
797 | ||
798 | default: | |
799 | return 0; | |
800 | } | |
801 | } | |
802 | ||
803 | /* ------------------------------------------------------------------------ | |
804 | * UVC Controls | |
805 | */ | |
806 | ||
807 | static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, | |
808 | struct uvc_control_mapping **mapping, struct uvc_control **control, | |
809 | int next) | |
810 | { | |
811 | struct uvc_control *ctrl; | |
812 | struct uvc_control_mapping *map; | |
813 | unsigned int i; | |
814 | ||
815 | if (entity == NULL) | |
816 | return; | |
817 | ||
818 | for (i = 0; i < entity->ncontrols; ++i) { | |
819 | ctrl = &entity->controls[i]; | |
071c8bb8 | 820 | if (!ctrl->initialized) |
c0efd232 LP |
821 | continue; |
822 | ||
071c8bb8 | 823 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
c0efd232 LP |
824 | if ((map->id == v4l2_id) && !next) { |
825 | *control = ctrl; | |
826 | *mapping = map; | |
827 | return; | |
828 | } | |
829 | ||
830 | if ((*mapping == NULL || (*mapping)->id > map->id) && | |
831 | (map->id > v4l2_id) && next) { | |
832 | *control = ctrl; | |
833 | *mapping = map; | |
834 | } | |
835 | } | |
836 | } | |
837 | } | |
838 | ||
23d9f3ef | 839 | static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, |
c0efd232 LP |
840 | __u32 v4l2_id, struct uvc_control_mapping **mapping) |
841 | { | |
842 | struct uvc_control *ctrl = NULL; | |
843 | struct uvc_entity *entity; | |
844 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | |
845 | ||
846 | *mapping = NULL; | |
847 | ||
848 | /* Mask the query flags. */ | |
849 | v4l2_id &= V4L2_CTRL_ID_MASK; | |
850 | ||
851 | /* Find the control. */ | |
6241d8ca | 852 | list_for_each_entry(entity, &chain->entities, chain) { |
c0efd232 LP |
853 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
854 | if (ctrl && !next) | |
855 | return ctrl; | |
856 | } | |
857 | ||
858 | if (ctrl == NULL && !next) | |
859 | uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", | |
860 | v4l2_id); | |
861 | ||
862 | return ctrl; | |
863 | } | |
864 | ||
59529081 LP |
865 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, |
866 | struct uvc_control *ctrl) | |
867 | { | |
868 | int ret; | |
869 | ||
9eb30d2f | 870 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 | 871 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, |
071c8bb8 | 872 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 873 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), |
071c8bb8 | 874 | ctrl->info.size); |
59529081 LP |
875 | if (ret < 0) |
876 | return ret; | |
877 | } | |
878 | ||
9eb30d2f | 879 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { |
59529081 | 880 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, |
071c8bb8 | 881 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 882 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), |
071c8bb8 | 883 | ctrl->info.size); |
59529081 LP |
884 | if (ret < 0) |
885 | return ret; | |
886 | } | |
9eb30d2f | 887 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { |
59529081 | 888 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, |
071c8bb8 | 889 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 890 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), |
071c8bb8 | 891 | ctrl->info.size); |
59529081 LP |
892 | if (ret < 0) |
893 | return ret; | |
894 | } | |
9eb30d2f | 895 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { |
59529081 | 896 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, |
071c8bb8 | 897 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 898 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), |
071c8bb8 | 899 | ctrl->info.size); |
c4d99f89 LP |
900 | if (ret < 0) { |
901 | if (UVC_ENTITY_TYPE(ctrl->entity) != | |
902 | UVC_VC_EXTENSION_UNIT) | |
903 | return ret; | |
904 | ||
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. | |
908 | */ | |
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, | |
913 | ctrl->info.size); | |
914 | } | |
59529081 LP |
915 | } |
916 | ||
917 | ctrl->cached = 1; | |
918 | return 0; | |
919 | } | |
920 | ||
cb74d482 HG |
921 | static int __uvc_ctrl_get(struct uvc_video_chain *chain, |
922 | struct uvc_control *ctrl, struct uvc_control_mapping *mapping, | |
923 | s32 *value) | |
924 | { | |
925 | struct uvc_menu_info *menu; | |
926 | unsigned int i; | |
927 | int ret; | |
928 | ||
929 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) | |
930 | return -EINVAL; | |
931 | ||
932 | if (!ctrl->loaded) { | |
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), | |
936 | ctrl->info.size); | |
937 | if (ret < 0) | |
938 | return ret; | |
939 | ||
940 | ctrl->loaded = 1; | |
941 | } | |
942 | ||
943 | *value = mapping->get(mapping, UVC_GET_CUR, | |
944 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
945 | ||
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) { | |
950 | *value = i; | |
951 | break; | |
952 | } | |
953 | } | |
954 | } | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
35f16741 HG |
959 | static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, |
960 | struct uvc_control *ctrl, | |
961 | struct uvc_control_mapping *mapping, | |
c0efd232 LP |
962 | struct v4l2_queryctrl *v4l2_ctrl) |
963 | { | |
55afeb8a HG |
964 | struct uvc_control_mapping *master_map = NULL; |
965 | struct uvc_control *master_ctrl = NULL; | |
c0efd232 LP |
966 | struct uvc_menu_info *menu; |
967 | unsigned int i; | |
c0efd232 | 968 | |
54812c77 | 969 | memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); |
c0efd232 LP |
970 | v4l2_ctrl->id = mapping->id; |
971 | v4l2_ctrl->type = mapping->v4l2_type; | |
d0ebf307 | 972 | strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); |
c0efd232 LP |
973 | v4l2_ctrl->flags = 0; |
974 | ||
9eb30d2f | 975 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) |
a90ef69c | 976 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; |
9eb30d2f | 977 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) |
c0efd232 LP |
978 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
979 | ||
55afeb8a HG |
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)) { | |
984 | s32 val; | |
985 | int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); | |
986 | if (ret < 0) | |
987 | return ret; | |
988 | ||
989 | if (val != mapping->master_manual) | |
990 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
991 | } | |
992 | ||
59529081 | 993 | if (!ctrl->cached) { |
35f16741 | 994 | int ret = uvc_ctrl_populate_cache(chain, ctrl); |
b482d923 | 995 | if (ret < 0) |
35f16741 | 996 | return ret; |
59529081 LP |
997 | } |
998 | ||
9eb30d2f | 999 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 LP |
1000 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, |
1001 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | |
c0efd232 LP |
1002 | } |
1003 | ||
54812c77 LP |
1004 | switch (mapping->v4l2_type) { |
1005 | case V4L2_CTRL_TYPE_MENU: | |
c0efd232 LP |
1006 | v4l2_ctrl->minimum = 0; |
1007 | v4l2_ctrl->maximum = mapping->menu_count - 1; | |
1008 | v4l2_ctrl->step = 1; | |
1009 | ||
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; | |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | ||
35f16741 | 1018 | return 0; |
54812c77 LP |
1019 | |
1020 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1021 | v4l2_ctrl->minimum = 0; | |
1022 | v4l2_ctrl->maximum = 1; | |
1023 | v4l2_ctrl->step = 1; | |
35f16741 | 1024 | return 0; |
54812c77 | 1025 | |
f4eabafe LP |
1026 | case V4L2_CTRL_TYPE_BUTTON: |
1027 | v4l2_ctrl->minimum = 0; | |
1028 | v4l2_ctrl->maximum = 0; | |
1029 | v4l2_ctrl->step = 0; | |
35f16741 | 1030 | return 0; |
f4eabafe | 1031 | |
54812c77 LP |
1032 | default: |
1033 | break; | |
c0efd232 LP |
1034 | } |
1035 | ||
9eb30d2f | 1036 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) |
59529081 LP |
1037 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, |
1038 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
c0efd232 | 1039 | |
9eb30d2f | 1040 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) |
59529081 LP |
1041 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, |
1042 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1043 | ||
9eb30d2f | 1044 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) |
59529081 LP |
1045 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, |
1046 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1047 | ||
35f16741 HG |
1048 | return 0; |
1049 | } | |
1050 | ||
1051 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, | |
1052 | struct v4l2_queryctrl *v4l2_ctrl) | |
1053 | { | |
1054 | struct uvc_control *ctrl; | |
1055 | struct uvc_control_mapping *mapping; | |
1056 | int ret; | |
1057 | ||
1058 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1059 | if (ret < 0) | |
1060 | return -ERESTARTSYS; | |
1061 | ||
1062 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); | |
1063 | if (ctrl == NULL) { | |
1064 | ret = -EINVAL; | |
1065 | goto done; | |
1066 | } | |
1067 | ||
1068 | ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); | |
27a61c13 LP |
1069 | done: |
1070 | mutex_unlock(&chain->ctrl_mutex); | |
1071 | return ret; | |
c0efd232 LP |
1072 | } |
1073 | ||
23d9f3ef LP |
1074 | /* |
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 | |
1081 | * manually. | |
1082 | */ | |
1083 | int uvc_query_v4l2_menu(struct uvc_video_chain *chain, | |
1084 | struct v4l2_querymenu *query_menu) | |
1085 | { | |
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; | |
1091 | int ret; | |
1092 | ||
1093 | memset(query_menu, 0, sizeof(*query_menu)); | |
1094 | query_menu->id = id; | |
1095 | query_menu->index = index; | |
1096 | ||
1097 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1098 | if (ret < 0) | |
1099 | return -ERESTARTSYS; | |
1100 | ||
1101 | ctrl = uvc_find_control(chain, query_menu->id, &mapping); | |
1102 | if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { | |
1103 | ret = -EINVAL; | |
1104 | goto done; | |
1105 | } | |
1106 | ||
1107 | if (query_menu->index >= mapping->menu_count) { | |
1108 | ret = -EINVAL; | |
1109 | goto done; | |
1110 | } | |
1111 | ||
1112 | menu_info = &mapping->menu_info[query_menu->index]; | |
fc2d573f | 1113 | |
241fa6e4 HG |
1114 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1115 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
fc2d573f LP |
1116 | s32 bitmap; |
1117 | ||
1118 | if (!ctrl->cached) { | |
1119 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1120 | if (ret < 0) | |
1121 | goto done; | |
1122 | } | |
1123 | ||
1124 | bitmap = mapping->get(mapping, UVC_GET_RES, | |
1125 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1126 | if (!(bitmap & menu_info->value)) { | |
1127 | ret = -EINVAL; | |
1128 | goto done; | |
1129 | } | |
1130 | } | |
1131 | ||
23d9f3ef LP |
1132 | strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); |
1133 | ||
1134 | done: | |
1135 | mutex_unlock(&chain->ctrl_mutex); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
b4012002 HG |
1139 | /* -------------------------------------------------------------------------- |
1140 | * Ctrl event handling | |
1141 | */ | |
1142 | ||
1143 | static void uvc_ctrl_fill_event(struct uvc_video_chain *chain, | |
1144 | struct v4l2_event *ev, | |
1145 | struct uvc_control *ctrl, | |
1146 | struct uvc_control_mapping *mapping, | |
1147 | s32 value, u32 changes) | |
1148 | { | |
1149 | struct v4l2_queryctrl v4l2_ctrl; | |
1150 | ||
1151 | __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl); | |
1152 | ||
1153 | memset(ev->reserved, 0, sizeof(ev->reserved)); | |
1154 | ev->type = V4L2_EVENT_CTRL; | |
1155 | ev->id = v4l2_ctrl.id; | |
1156 | ev->u.ctrl.value = value; | |
1157 | ev->u.ctrl.changes = changes; | |
1158 | ev->u.ctrl.type = v4l2_ctrl.type; | |
1159 | ev->u.ctrl.flags = v4l2_ctrl.flags; | |
1160 | ev->u.ctrl.minimum = v4l2_ctrl.minimum; | |
1161 | ev->u.ctrl.maximum = v4l2_ctrl.maximum; | |
1162 | ev->u.ctrl.step = v4l2_ctrl.step; | |
1163 | ev->u.ctrl.default_value = v4l2_ctrl.default_value; | |
1164 | } | |
1165 | ||
1166 | static void uvc_ctrl_send_event(struct uvc_fh *handle, | |
1167 | struct uvc_control *ctrl, struct uvc_control_mapping *mapping, | |
1168 | s32 value, u32 changes) | |
1169 | { | |
1170 | struct v4l2_subscribed_event *sev; | |
1171 | struct v4l2_event ev; | |
1172 | ||
1173 | if (list_empty(&mapping->ev_subs)) | |
1174 | return; | |
1175 | ||
1176 | uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, value, changes); | |
1177 | ||
1178 | list_for_each_entry(sev, &mapping->ev_subs, node) { | |
1179 | if (sev->fh && (sev->fh != &handle->vfh || | |
805e9b4a HG |
1180 | (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || |
1181 | (changes & V4L2_EVENT_CTRL_CH_FLAGS))) | |
b4012002 HG |
1182 | v4l2_event_queue_fh(sev->fh, &ev); |
1183 | } | |
1184 | } | |
1185 | ||
805e9b4a HG |
1186 | static void uvc_ctrl_send_slave_event(struct uvc_fh *handle, |
1187 | struct uvc_control *master, u32 slave_id, | |
1188 | const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) | |
1189 | { | |
1190 | struct uvc_control_mapping *mapping = NULL; | |
1191 | struct uvc_control *ctrl = NULL; | |
1192 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
1193 | unsigned int i; | |
1194 | s32 val = 0; | |
1195 | ||
1196 | /* | |
1197 | * We can skip sending an event for the slave if the slave | |
1198 | * is being modified in the same transaction. | |
1199 | */ | |
1200 | for (i = 0; i < xctrls_count; i++) { | |
1201 | if (xctrls[i].id == slave_id) | |
1202 | return; | |
1203 | } | |
1204 | ||
1205 | __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); | |
1206 | if (ctrl == NULL) | |
1207 | return; | |
1208 | ||
1209 | if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) | |
1210 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
1211 | ||
1212 | uvc_ctrl_send_event(handle, ctrl, mapping, val, changes); | |
1213 | } | |
1214 | ||
b4012002 HG |
1215 | static void uvc_ctrl_send_events(struct uvc_fh *handle, |
1216 | const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) | |
1217 | { | |
1218 | struct uvc_control_mapping *mapping; | |
1219 | struct uvc_control *ctrl; | |
805e9b4a | 1220 | u32 changes = V4L2_EVENT_CTRL_CH_VALUE; |
b4012002 | 1221 | unsigned int i; |
805e9b4a | 1222 | unsigned int j; |
b4012002 HG |
1223 | |
1224 | for (i = 0; i < xctrls_count; ++i) { | |
1225 | ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping); | |
805e9b4a HG |
1226 | |
1227 | for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { | |
1228 | if (!mapping->slave_ids[j]) | |
1229 | break; | |
1230 | uvc_ctrl_send_slave_event(handle, ctrl, | |
1231 | mapping->slave_ids[j], | |
1232 | xctrls, xctrls_count); | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * If the master is being modified in the same transaction | |
1237 | * flags may change too. | |
1238 | */ | |
1239 | if (mapping->master_id) { | |
1240 | for (j = 0; j < xctrls_count; j++) { | |
1241 | if (xctrls[j].id == mapping->master_id) { | |
1242 | changes |= V4L2_EVENT_CTRL_CH_FLAGS; | |
1243 | break; | |
1244 | } | |
1245 | } | |
1246 | } | |
1247 | ||
b4012002 | 1248 | uvc_ctrl_send_event(handle, ctrl, mapping, xctrls[i].value, |
805e9b4a | 1249 | changes); |
b4012002 HG |
1250 | } |
1251 | } | |
1252 | ||
6e6d76cd | 1253 | static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) |
b4012002 HG |
1254 | { |
1255 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1256 | struct uvc_control_mapping *mapping; | |
1257 | struct uvc_control *ctrl; | |
1258 | int ret; | |
1259 | ||
1260 | ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex); | |
1261 | if (ret < 0) | |
1262 | return -ERESTARTSYS; | |
1263 | ||
1264 | ctrl = uvc_find_control(handle->chain, sev->id, &mapping); | |
1265 | if (ctrl == NULL) { | |
1266 | ret = -EINVAL; | |
1267 | goto done; | |
1268 | } | |
1269 | ||
1270 | list_add_tail(&sev->node, &mapping->ev_subs); | |
1271 | if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) { | |
1272 | struct v4l2_event ev; | |
1273 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
1274 | s32 val = 0; | |
1275 | ||
1276 | if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) | |
1277 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
1278 | ||
1279 | uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, | |
1280 | changes); | |
6e6d76cd HV |
1281 | /* Mark the queue as active, allowing this initial |
1282 | event to be accepted. */ | |
1283 | sev->elems = elems; | |
b4012002 HG |
1284 | v4l2_event_queue_fh(sev->fh, &ev); |
1285 | } | |
1286 | ||
1287 | done: | |
1288 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev) | |
1293 | { | |
1294 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1295 | ||
1296 | mutex_lock(&handle->chain->ctrl_mutex); | |
1297 | list_del(&sev->node); | |
1298 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1299 | } | |
1300 | ||
1301 | const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = { | |
1302 | .add = uvc_ctrl_add_event, | |
1303 | .del = uvc_ctrl_del_event, | |
1304 | .replace = v4l2_ctrl_replace, | |
1305 | .merge = v4l2_ctrl_merge, | |
1306 | }; | |
c0efd232 LP |
1307 | |
1308 | /* -------------------------------------------------------------------------- | |
1309 | * Control transactions | |
1310 | * | |
1311 | * To make extended set operations as atomic as the hardware allows, controls | |
1312 | * are handled using begin/commit/rollback operations. | |
1313 | * | |
1314 | * At the beginning of a set request, uvc_ctrl_begin should be called to | |
1315 | * initialize the request. This function acquires the control lock. | |
1316 | * | |
1317 | * When setting a control, the new value is stored in the control data field | |
1318 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | |
1319 | * later processing. If the UVC and V4L2 control sizes differ, the current | |
1320 | * value is loaded from the hardware before storing the new value in the data | |
1321 | * field. | |
1322 | * | |
1323 | * After processing all controls in the transaction, uvc_ctrl_commit or | |
1324 | * uvc_ctrl_rollback must be called to apply the pending changes to the | |
1325 | * hardware or revert them. When applying changes, all controls marked as | |
1326 | * dirty will be modified in the UVC device, and the dirty flag will be | |
1327 | * cleared. When reverting controls, the control data field | |
1328 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | |
1329 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | |
1330 | * control lock. | |
1331 | */ | |
8e113595 | 1332 | int uvc_ctrl_begin(struct uvc_video_chain *chain) |
c0efd232 | 1333 | { |
8e113595 | 1334 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; |
c0efd232 LP |
1335 | } |
1336 | ||
1337 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | |
1338 | struct uvc_entity *entity, int rollback) | |
1339 | { | |
1340 | struct uvc_control *ctrl; | |
1341 | unsigned int i; | |
1342 | int ret; | |
1343 | ||
1344 | if (entity == NULL) | |
1345 | return 0; | |
1346 | ||
1347 | for (i = 0; i < entity->ncontrols; ++i) { | |
1348 | ctrl = &entity->controls[i]; | |
071c8bb8 | 1349 | if (!ctrl->initialized) |
b1accfa1 LP |
1350 | continue; |
1351 | ||
1352 | /* Reset the loaded flag for auto-update controls that were | |
1353 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | |
6b363f9f LP |
1354 | * uvc_ctrl_get from using the cached value, and for write-only |
1355 | * controls to prevent uvc_ctrl_set from setting bits not | |
1356 | * explicitly set by the user. | |
b1accfa1 | 1357 | */ |
6b363f9f LP |
1358 | if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE || |
1359 | !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) | |
b1accfa1 LP |
1360 | ctrl->loaded = 0; |
1361 | ||
1362 | if (!ctrl->dirty) | |
c0efd232 LP |
1363 | continue; |
1364 | ||
1365 | if (!rollback) | |
b482d923 | 1366 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, |
071c8bb8 | 1367 | dev->intfnum, ctrl->info.selector, |
c0efd232 | 1368 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1369 | ctrl->info.size); |
c0efd232 LP |
1370 | else |
1371 | ret = 0; | |
1372 | ||
1373 | if (rollback || ret < 0) | |
1374 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1375 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
071c8bb8 | 1376 | ctrl->info.size); |
c0efd232 | 1377 | |
c0efd232 LP |
1378 | ctrl->dirty = 0; |
1379 | ||
1380 | if (ret < 0) | |
1381 | return ret; | |
1382 | } | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
b4012002 HG |
1387 | int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, |
1388 | const struct v4l2_ext_control *xctrls, | |
1389 | unsigned int xctrls_count) | |
c0efd232 | 1390 | { |
b4012002 | 1391 | struct uvc_video_chain *chain = handle->chain; |
c0efd232 LP |
1392 | struct uvc_entity *entity; |
1393 | int ret = 0; | |
1394 | ||
1395 | /* Find the control. */ | |
6241d8ca | 1396 | list_for_each_entry(entity, &chain->entities, chain) { |
8e113595 | 1397 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); |
c0efd232 LP |
1398 | if (ret < 0) |
1399 | goto done; | |
1400 | } | |
1401 | ||
b4012002 HG |
1402 | if (!rollback) |
1403 | uvc_ctrl_send_events(handle, xctrls, xctrls_count); | |
c0efd232 | 1404 | done: |
8e113595 | 1405 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1406 | return ret; |
1407 | } | |
1408 | ||
35f16741 HG |
1409 | int uvc_ctrl_get(struct uvc_video_chain *chain, |
1410 | struct v4l2_ext_control *xctrl) | |
1411 | { | |
1412 | struct uvc_control *ctrl; | |
1413 | struct uvc_control_mapping *mapping; | |
1414 | ||
1415 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); | |
1416 | if (ctrl == NULL) | |
1417 | return -EINVAL; | |
1418 | ||
1419 | return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); | |
1420 | } | |
1421 | ||
8e113595 | 1422 | int uvc_ctrl_set(struct uvc_video_chain *chain, |
c0efd232 LP |
1423 | struct v4l2_ext_control *xctrl) |
1424 | { | |
1425 | struct uvc_control *ctrl; | |
1426 | struct uvc_control_mapping *mapping; | |
e54532e5 LP |
1427 | s32 value; |
1428 | u32 step; | |
1429 | s32 min; | |
1430 | s32 max; | |
c0efd232 LP |
1431 | int ret; |
1432 | ||
8e113595 | 1433 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
9eb30d2f | 1434 | if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) == 0) |
c0efd232 LP |
1435 | return -EINVAL; |
1436 | ||
e54532e5 LP |
1437 | /* Clamp out of range values. */ |
1438 | switch (mapping->v4l2_type) { | |
1439 | case V4L2_CTRL_TYPE_INTEGER: | |
1440 | if (!ctrl->cached) { | |
1441 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1442 | if (ret < 0) | |
1443 | return ret; | |
1444 | } | |
1445 | ||
1446 | min = mapping->get(mapping, UVC_GET_MIN, | |
1447 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
1448 | max = mapping->get(mapping, UVC_GET_MAX, | |
1449 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1450 | step = mapping->get(mapping, UVC_GET_RES, | |
1451 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
cf7a50ee LP |
1452 | if (step == 0) |
1453 | step = 1; | |
e54532e5 LP |
1454 | |
1455 | xctrl->value = min + (xctrl->value - min + step/2) / step * step; | |
1456 | xctrl->value = clamp(xctrl->value, min, max); | |
1457 | value = xctrl->value; | |
1458 | break; | |
1459 | ||
1460 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1461 | xctrl->value = clamp(xctrl->value, 0, 1); | |
1462 | value = xctrl->value; | |
1463 | break; | |
1464 | ||
1465 | case V4L2_CTRL_TYPE_MENU: | |
1466 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | |
8a4e76c1 | 1467 | return -ERANGE; |
e54532e5 | 1468 | value = mapping->menu_info[xctrl->value].value; |
f411f103 LP |
1469 | |
1470 | /* Valid menu indices are reported by the GET_RES request for | |
1471 | * UVC controls that support it. | |
1472 | */ | |
241fa6e4 HG |
1473 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1474 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
f411f103 LP |
1475 | if (!ctrl->cached) { |
1476 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1477 | if (ret < 0) | |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | step = mapping->get(mapping, UVC_GET_RES, | |
1482 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1483 | if (!(step & value)) | |
1484 | return -ERANGE; | |
1485 | } | |
1486 | ||
e54532e5 LP |
1487 | break; |
1488 | ||
1489 | default: | |
1490 | value = xctrl->value; | |
1491 | break; | |
c0efd232 LP |
1492 | } |
1493 | ||
e54532e5 LP |
1494 | /* If the mapping doesn't span the whole UVC control, the current value |
1495 | * needs to be loaded from the device to perform the read-modify-write | |
1496 | * operation. | |
1497 | */ | |
071c8bb8 | 1498 | if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) { |
9eb30d2f | 1499 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { |
c0efd232 | 1500 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1501 | 0, ctrl->info.size); |
c0efd232 | 1502 | } else { |
8e113595 LP |
1503 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
1504 | ctrl->entity->id, chain->dev->intfnum, | |
071c8bb8 | 1505 | ctrl->info.selector, |
c0efd232 | 1506 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1507 | ctrl->info.size); |
c0efd232 LP |
1508 | if (ret < 0) |
1509 | return ret; | |
1510 | } | |
1511 | ||
b1accfa1 | 1512 | ctrl->loaded = 1; |
c0efd232 LP |
1513 | } |
1514 | ||
e54532e5 | 1515 | /* Backup the current value in case we need to rollback later. */ |
c0efd232 LP |
1516 | if (!ctrl->dirty) { |
1517 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1518 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
071c8bb8 | 1519 | ctrl->info.size); |
c0efd232 LP |
1520 | } |
1521 | ||
9768352a LP |
1522 | mapping->set(mapping, value, |
1523 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
c0efd232 LP |
1524 | |
1525 | ctrl->dirty = 1; | |
1526 | ctrl->modified = 1; | |
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | /* -------------------------------------------------------------------------- | |
1531 | * Dynamic controls | |
1532 | */ | |
1533 | ||
b5977a58 LP |
1534 | static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev, |
1535 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1536 | { | |
1537 | struct uvc_ctrl_fixup { | |
1538 | struct usb_device_id id; | |
1539 | u8 entity; | |
1540 | u8 selector; | |
1541 | u8 flags; | |
1542 | }; | |
1543 | ||
1544 | static const struct uvc_ctrl_fixup fixups[] = { | |
1545 | { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1, | |
9eb30d2f LP |
1546 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1547 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1548 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1549 | { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1, |
9eb30d2f LP |
1550 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1551 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1552 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1553 | { { USB_DEVICE(0x046d, 0x0994) }, 9, 1, |
9eb30d2f LP |
1554 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1555 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1556 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 LP |
1557 | }; |
1558 | ||
1559 | unsigned int i; | |
1560 | ||
1561 | for (i = 0; i < ARRAY_SIZE(fixups); ++i) { | |
1562 | if (!usb_match_one_id(dev->intf, &fixups[i].id)) | |
1563 | continue; | |
1564 | ||
1565 | if (fixups[i].entity == ctrl->entity->id && | |
1566 | fixups[i].selector == info->selector) { | |
1567 | info->flags = fixups[i].flags; | |
1568 | return; | |
1569 | } | |
1570 | } | |
1571 | } | |
1572 | ||
52c58ad6 LP |
1573 | /* |
1574 | * Query control information (size and flags) for XU controls. | |
1575 | */ | |
1576 | static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, | |
1577 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1578 | { | |
1579 | u8 *data; | |
1580 | int ret; | |
1581 | ||
1582 | data = kmalloc(2, GFP_KERNEL); | |
1583 | if (data == NULL) | |
1584 | return -ENOMEM; | |
1585 | ||
1586 | memcpy(info->entity, ctrl->entity->extension.guidExtensionCode, | |
1587 | sizeof(info->entity)); | |
1588 | info->index = ctrl->index; | |
1589 | info->selector = ctrl->index + 1; | |
1590 | ||
1591 | /* Query and verify the control length (GET_LEN) */ | |
1592 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, | |
1593 | info->selector, data, 2); | |
1594 | if (ret < 0) { | |
1595 | uvc_trace(UVC_TRACE_CONTROL, | |
1596 | "GET_LEN failed on control %pUl/%u (%d).\n", | |
1597 | info->entity, info->selector, ret); | |
1598 | goto done; | |
1599 | } | |
1600 | ||
1601 | info->size = le16_to_cpup((__le16 *)data); | |
1602 | ||
1603 | /* Query the control information (GET_INFO) */ | |
1604 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, | |
1605 | info->selector, data, 1); | |
1606 | if (ret < 0) { | |
1607 | uvc_trace(UVC_TRACE_CONTROL, | |
1608 | "GET_INFO failed on control %pUl/%u (%d).\n", | |
1609 | info->entity, info->selector, ret); | |
1610 | goto done; | |
1611 | } | |
1612 | ||
9eb30d2f LP |
1613 | info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1614 | | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF | |
1615 | | (data[0] & UVC_CONTROL_CAP_GET ? | |
1616 | UVC_CTRL_FLAG_GET_CUR : 0) | |
1617 | | (data[0] & UVC_CONTROL_CAP_SET ? | |
1618 | UVC_CTRL_FLAG_SET_CUR : 0) | |
52c58ad6 | 1619 | | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ? |
9eb30d2f | 1620 | UVC_CTRL_FLAG_AUTO_UPDATE : 0); |
52c58ad6 | 1621 | |
b5977a58 LP |
1622 | uvc_ctrl_fixup_xu_info(dev, ctrl, info); |
1623 | ||
52c58ad6 LP |
1624 | uvc_trace(UVC_TRACE_CONTROL, "XU control %pUl/%u queried: len %u, " |
1625 | "flags { get %u set %u auto %u }.\n", | |
1626 | info->entity, info->selector, info->size, | |
9eb30d2f LP |
1627 | (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0, |
1628 | (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0, | |
1629 | (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0); | |
52c58ad6 LP |
1630 | |
1631 | done: | |
1632 | kfree(data); | |
1633 | return ret; | |
1634 | } | |
1635 | ||
1636 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
1637 | const struct uvc_control_info *info); | |
1638 | ||
1639 | static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev, | |
1640 | struct uvc_control *ctrl) | |
1641 | { | |
1642 | struct uvc_control_info info; | |
1643 | int ret; | |
1644 | ||
1645 | if (ctrl->initialized) | |
1646 | return 0; | |
1647 | ||
1648 | ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info); | |
1649 | if (ret < 0) | |
1650 | return ret; | |
1651 | ||
1652 | ret = uvc_ctrl_add_info(dev, ctrl, &info); | |
1653 | if (ret < 0) | |
1654 | uvc_trace(UVC_TRACE_CONTROL, "Failed to initialize control " | |
1655 | "%pUl/%u on device %s entity %u\n", info.entity, | |
1656 | info.selector, dev->udev->devpath, ctrl->entity->id); | |
1657 | ||
1658 | return ret; | |
1659 | } | |
1660 | ||
8e113595 | 1661 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, |
fe78d187 | 1662 | struct uvc_xu_control_query *xqry) |
c0efd232 LP |
1663 | { |
1664 | struct uvc_entity *entity; | |
fe78d187 | 1665 | struct uvc_control *ctrl; |
c0efd232 | 1666 | unsigned int i, found = 0; |
fe78d187 MR |
1667 | __u32 reqflags; |
1668 | __u16 size; | |
1669 | __u8 *data = NULL; | |
c0efd232 LP |
1670 | int ret; |
1671 | ||
1672 | /* Find the extension unit. */ | |
6241d8ca LP |
1673 | list_for_each_entry(entity, &chain->entities, chain) { |
1674 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | |
fe78d187 | 1675 | entity->id == xqry->unit) |
c0efd232 LP |
1676 | break; |
1677 | } | |
1678 | ||
fe78d187 | 1679 | if (entity->id != xqry->unit) { |
c0efd232 | 1680 | uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", |
fe78d187 MR |
1681 | xqry->unit); |
1682 | return -ENOENT; | |
c0efd232 LP |
1683 | } |
1684 | ||
52c58ad6 | 1685 | /* Find the control and perform delayed initialization if needed. */ |
c0efd232 LP |
1686 | for (i = 0; i < entity->ncontrols; ++i) { |
1687 | ctrl = &entity->controls[i]; | |
fe78d187 | 1688 | if (ctrl->index == xqry->selector - 1) { |
c0efd232 LP |
1689 | found = 1; |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | if (!found) { | |
36bd883e | 1695 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", |
fe78d187 MR |
1696 | entity->extension.guidExtensionCode, xqry->selector); |
1697 | return -ENOENT; | |
c0efd232 LP |
1698 | } |
1699 | ||
27a61c13 LP |
1700 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
1701 | return -ERESTARTSYS; | |
1702 | ||
52c58ad6 | 1703 | ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl); |
27a61c13 LP |
1704 | if (ret < 0) { |
1705 | ret = -ENOENT; | |
1706 | goto done; | |
1707 | } | |
52c58ad6 | 1708 | |
fe78d187 MR |
1709 | /* Validate the required buffer size and flags for the request */ |
1710 | reqflags = 0; | |
1711 | size = ctrl->info.size; | |
1712 | ||
1713 | switch (xqry->query) { | |
1714 | case UVC_GET_CUR: | |
9eb30d2f | 1715 | reqflags = UVC_CTRL_FLAG_GET_CUR; |
fe78d187 MR |
1716 | break; |
1717 | case UVC_GET_MIN: | |
9eb30d2f | 1718 | reqflags = UVC_CTRL_FLAG_GET_MIN; |
fe78d187 MR |
1719 | break; |
1720 | case UVC_GET_MAX: | |
9eb30d2f | 1721 | reqflags = UVC_CTRL_FLAG_GET_MAX; |
fe78d187 MR |
1722 | break; |
1723 | case UVC_GET_DEF: | |
9eb30d2f | 1724 | reqflags = UVC_CTRL_FLAG_GET_DEF; |
fe78d187 MR |
1725 | break; |
1726 | case UVC_GET_RES: | |
9eb30d2f | 1727 | reqflags = UVC_CTRL_FLAG_GET_RES; |
fe78d187 MR |
1728 | break; |
1729 | case UVC_SET_CUR: | |
9eb30d2f | 1730 | reqflags = UVC_CTRL_FLAG_SET_CUR; |
fe78d187 MR |
1731 | break; |
1732 | case UVC_GET_LEN: | |
1733 | size = 2; | |
1734 | break; | |
1735 | case UVC_GET_INFO: | |
1736 | size = 1; | |
1737 | break; | |
1738 | default: | |
27a61c13 LP |
1739 | ret = -EINVAL; |
1740 | goto done; | |
1741 | } | |
c0efd232 | 1742 | |
fe78d187 MR |
1743 | if (size != xqry->size) { |
1744 | ret = -ENOBUFS; | |
27a61c13 LP |
1745 | goto done; |
1746 | } | |
c0efd232 | 1747 | |
fe78d187 MR |
1748 | if (reqflags && !(ctrl->info.flags & reqflags)) { |
1749 | ret = -EBADRQC; | |
1750 | goto done; | |
1751 | } | |
1752 | ||
1753 | data = kmalloc(size, GFP_KERNEL); | |
1754 | if (data == NULL) { | |
1755 | ret = -ENOMEM; | |
1756 | goto done; | |
1757 | } | |
c0efd232 | 1758 | |
fe78d187 MR |
1759 | if (xqry->query == UVC_SET_CUR && |
1760 | copy_from_user(data, xqry->data, size)) { | |
c0efd232 | 1761 | ret = -EFAULT; |
27a61c13 | 1762 | goto done; |
c0efd232 LP |
1763 | } |
1764 | ||
fe78d187 MR |
1765 | ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit, |
1766 | chain->dev->intfnum, xqry->selector, data, size); | |
c0efd232 | 1767 | if (ret < 0) |
27a61c13 | 1768 | goto done; |
c0efd232 | 1769 | |
fe78d187 MR |
1770 | if (xqry->query != UVC_SET_CUR && |
1771 | copy_to_user(xqry->data, data, size)) | |
c0efd232 | 1772 | ret = -EFAULT; |
27a61c13 | 1773 | done: |
fe78d187 | 1774 | kfree(data); |
8e113595 | 1775 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1776 | return ret; |
1777 | } | |
1778 | ||
1779 | /* -------------------------------------------------------------------------- | |
1780 | * Suspend/resume | |
1781 | */ | |
1782 | ||
1783 | /* | |
1784 | * Restore control values after resume, skipping controls that haven't been | |
1785 | * changed. | |
1786 | * | |
1787 | * TODO | |
1788 | * - Don't restore modified controls that are back to their default value. | |
1789 | * - Handle restore order (Auto-Exposure Mode should be restored before | |
1790 | * Exposure Time). | |
1791 | */ | |
1792 | int uvc_ctrl_resume_device(struct uvc_device *dev) | |
1793 | { | |
1794 | struct uvc_control *ctrl; | |
1795 | struct uvc_entity *entity; | |
1796 | unsigned int i; | |
1797 | int ret; | |
1798 | ||
1799 | /* Walk the entities list and restore controls when possible. */ | |
1800 | list_for_each_entry(entity, &dev->entities, list) { | |
1801 | ||
1802 | for (i = 0; i < entity->ncontrols; ++i) { | |
1803 | ctrl = &entity->controls[i]; | |
1804 | ||
071c8bb8 | 1805 | if (!ctrl->initialized || !ctrl->modified || |
9eb30d2f | 1806 | (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) |
c0efd232 LP |
1807 | continue; |
1808 | ||
36bd883e | 1809 | printk(KERN_INFO "restoring control %pUl/%u/%u\n", |
071c8bb8 LP |
1810 | ctrl->info.entity, ctrl->info.index, |
1811 | ctrl->info.selector); | |
c0efd232 LP |
1812 | ctrl->dirty = 1; |
1813 | } | |
1814 | ||
1815 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | |
1816 | if (ret < 0) | |
1817 | return ret; | |
1818 | } | |
1819 | ||
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | /* -------------------------------------------------------------------------- | |
1824 | * Control and mapping handling | |
1825 | */ | |
1826 | ||
ba2fa996 LP |
1827 | /* |
1828 | * Add control information to a given control. | |
1829 | */ | |
1830 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
1831 | const struct uvc_control_info *info) | |
1832 | { | |
1833 | int ret = 0; | |
c0efd232 | 1834 | |
071c8bb8 LP |
1835 | memcpy(&ctrl->info, info, sizeof(*info)); |
1836 | INIT_LIST_HEAD(&ctrl->info.mappings); | |
ba2fa996 LP |
1837 | |
1838 | /* Allocate an array to save control values (cur, def, max, etc.) */ | |
071c8bb8 | 1839 | ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1, |
ba2fa996 LP |
1840 | GFP_KERNEL); |
1841 | if (ctrl->uvc_data == NULL) { | |
1842 | ret = -ENOMEM; | |
1843 | goto done; | |
c0efd232 | 1844 | } |
b30ece53 | 1845 | |
071c8bb8 LP |
1846 | ctrl->initialized = 1; |
1847 | ||
36bd883e | 1848 | uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " |
071c8bb8 | 1849 | "entity %u\n", ctrl->info.entity, ctrl->info.selector, |
ba2fa996 | 1850 | dev->udev->devpath, ctrl->entity->id); |
b30ece53 LP |
1851 | |
1852 | done: | |
071c8bb8 | 1853 | if (ret < 0) |
ba2fa996 | 1854 | kfree(ctrl->uvc_data); |
b30ece53 | 1855 | return ret; |
c0efd232 LP |
1856 | } |
1857 | ||
1858 | /* | |
ba2fa996 | 1859 | * Add a control mapping to a given control. |
c0efd232 | 1860 | */ |
ba2fa996 LP |
1861 | static int __uvc_ctrl_add_mapping(struct uvc_device *dev, |
1862 | struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) | |
c0efd232 | 1863 | { |
ba2fa996 LP |
1864 | struct uvc_control_mapping *map; |
1865 | unsigned int size; | |
c0efd232 | 1866 | |
ba2fa996 LP |
1867 | /* Most mappings come from static kernel data and need to be duplicated. |
1868 | * Mappings that come from userspace will be unnecessarily duplicated, | |
1869 | * this could be optimized. | |
c0efd232 | 1870 | */ |
ba2fa996 LP |
1871 | map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL); |
1872 | if (map == NULL) | |
1873 | return -ENOMEM; | |
c0efd232 | 1874 | |
b4012002 HG |
1875 | INIT_LIST_HEAD(&map->ev_subs); |
1876 | ||
ba2fa996 LP |
1877 | size = sizeof(*mapping->menu_info) * mapping->menu_count; |
1878 | map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); | |
1879 | if (map->menu_info == NULL) { | |
1880 | kfree(map); | |
1881 | return -ENOMEM; | |
c0efd232 LP |
1882 | } |
1883 | ||
ba2fa996 LP |
1884 | if (map->get == NULL) |
1885 | map->get = uvc_get_le_value; | |
1886 | if (map->set == NULL) | |
1887 | map->set = uvc_set_le_value; | |
c0efd232 | 1888 | |
071c8bb8 | 1889 | list_add_tail(&map->list, &ctrl->info.mappings); |
ba2fa996 LP |
1890 | uvc_trace(UVC_TRACE_CONTROL, |
1891 | "Adding mapping '%s' to control %pUl/%u.\n", | |
071c8bb8 | 1892 | map->name, ctrl->info.entity, ctrl->info.selector); |
ba2fa996 LP |
1893 | |
1894 | return 0; | |
c0efd232 LP |
1895 | } |
1896 | ||
ba2fa996 LP |
1897 | int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, |
1898 | const struct uvc_control_mapping *mapping) | |
c0efd232 | 1899 | { |
ba2fa996 | 1900 | struct uvc_device *dev = chain->dev; |
c0efd232 | 1901 | struct uvc_control_mapping *map; |
ba2fa996 LP |
1902 | struct uvc_entity *entity; |
1903 | struct uvc_control *ctrl; | |
1904 | int found = 0; | |
8fb91b33 | 1905 | int ret; |
9768352a | 1906 | |
c0efd232 | 1907 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
ba2fa996 | 1908 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control " |
52c58ad6 | 1909 | "id 0x%08x is invalid.\n", mapping->name, |
c0efd232 LP |
1910 | mapping->id); |
1911 | return -EINVAL; | |
1912 | } | |
1913 | ||
c0c5e71e SL |
1914 | /* Search for the matching (GUID/CS) control on the current chain */ |
1915 | list_for_each_entry(entity, &chain->entities, chain) { | |
ba2fa996 | 1916 | unsigned int i; |
c0efd232 | 1917 | |
52c58ad6 LP |
1918 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT || |
1919 | !uvc_entity_match_guid(entity, mapping->entity)) | |
ba2fa996 | 1920 | continue; |
c0efd232 | 1921 | |
ba2fa996 LP |
1922 | for (i = 0; i < entity->ncontrols; ++i) { |
1923 | ctrl = &entity->controls[i]; | |
52c58ad6 | 1924 | if (ctrl->index == mapping->selector - 1) { |
ba2fa996 LP |
1925 | found = 1; |
1926 | break; | |
c0efd232 LP |
1927 | } |
1928 | } | |
1929 | ||
ba2fa996 LP |
1930 | if (found) |
1931 | break; | |
1932 | } | |
1933 | if (!found) | |
1934 | return -ENOENT; | |
c0efd232 | 1935 | |
ba2fa996 LP |
1936 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
1937 | return -ERESTARTSYS; | |
1938 | ||
52c58ad6 LP |
1939 | /* Perform delayed initialization of XU controls */ |
1940 | ret = uvc_ctrl_init_xu_ctrl(dev, ctrl); | |
1941 | if (ret < 0) { | |
1942 | ret = -ENOENT; | |
1943 | goto done; | |
1944 | } | |
1945 | ||
071c8bb8 | 1946 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
ba2fa996 LP |
1947 | if (mapping->id == map->id) { |
1948 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', " | |
1949 | "control id 0x%08x already exists.\n", | |
1950 | mapping->name, mapping->id); | |
1951 | ret = -EEXIST; | |
1952 | goto done; | |
1953 | } | |
c0efd232 | 1954 | } |
ba2fa996 | 1955 | |
8fb91b33 MR |
1956 | /* Prevent excess memory consumption */ |
1957 | if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) { | |
1958 | atomic_dec(&dev->nmappings); | |
1959 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum " | |
1960 | "mappings count (%u) exceeded.\n", mapping->name, | |
1961 | UVC_MAX_CONTROL_MAPPINGS); | |
1962 | ret = -ENOMEM; | |
1963 | goto done; | |
1964 | } | |
1965 | ||
ba2fa996 | 1966 | ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
8fb91b33 MR |
1967 | if (ret < 0) |
1968 | atomic_dec(&dev->nmappings); | |
1969 | ||
ba2fa996 LP |
1970 | done: |
1971 | mutex_unlock(&chain->ctrl_mutex); | |
c0efd232 LP |
1972 | return ret; |
1973 | } | |
1974 | ||
2bdd29cf | 1975 | /* |
d732c44c LP |
1976 | * Prune an entity of its bogus controls using a blacklist. Bogus controls |
1977 | * are currently the ones that crash the camera or unconditionally return an | |
1978 | * error when queried. | |
2bdd29cf | 1979 | */ |
ba2fa996 LP |
1980 | static void uvc_ctrl_prune_entity(struct uvc_device *dev, |
1981 | struct uvc_entity *entity) | |
2bdd29cf | 1982 | { |
fa34168b | 1983 | struct uvc_ctrl_blacklist { |
d732c44c LP |
1984 | struct usb_device_id id; |
1985 | u8 index; | |
fa34168b LP |
1986 | }; |
1987 | ||
1988 | static const struct uvc_ctrl_blacklist processing_blacklist[] = { | |
9405e3cb | 1989 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ |
d732c44c LP |
1990 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ |
1991 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | |
2bdd29cf | 1992 | }; |
fa34168b LP |
1993 | static const struct uvc_ctrl_blacklist camera_blacklist[] = { |
1994 | { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */ | |
1995 | }; | |
2bdd29cf | 1996 | |
fa34168b | 1997 | const struct uvc_ctrl_blacklist *blacklist; |
2bdd29cf | 1998 | unsigned int size; |
fa34168b | 1999 | unsigned int count; |
2bdd29cf | 2000 | unsigned int i; |
fa34168b | 2001 | u8 *controls; |
2bdd29cf | 2002 | |
fa34168b LP |
2003 | switch (UVC_ENTITY_TYPE(entity)) { |
2004 | case UVC_VC_PROCESSING_UNIT: | |
2005 | blacklist = processing_blacklist; | |
2006 | count = ARRAY_SIZE(processing_blacklist); | |
2007 | controls = entity->processing.bmControls; | |
2008 | size = entity->processing.bControlSize; | |
2009 | break; | |
2010 | ||
2011 | case UVC_ITT_CAMERA: | |
2012 | blacklist = camera_blacklist; | |
2013 | count = ARRAY_SIZE(camera_blacklist); | |
2014 | controls = entity->camera.bmControls; | |
2015 | size = entity->camera.bControlSize; | |
2016 | break; | |
2bdd29cf | 2017 | |
fa34168b LP |
2018 | default: |
2019 | return; | |
2020 | } | |
2bdd29cf | 2021 | |
fa34168b | 2022 | for (i = 0; i < count; ++i) { |
385097e0 | 2023 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) |
2bdd29cf LP |
2024 | continue; |
2025 | ||
d732c44c LP |
2026 | if (blacklist[i].index >= 8 * size || |
2027 | !uvc_test_bit(controls, blacklist[i].index)) | |
2bdd29cf LP |
2028 | continue; |
2029 | ||
d732c44c LP |
2030 | uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, " |
2031 | "removing it.\n", entity->id, blacklist[i].index); | |
2bdd29cf | 2032 | |
d732c44c | 2033 | uvc_clear_bit(controls, blacklist[i].index); |
2bdd29cf LP |
2034 | } |
2035 | } | |
2036 | ||
ba2fa996 LP |
2037 | /* |
2038 | * Add control information and hardcoded stock control mappings to the given | |
2039 | * device. | |
2040 | */ | |
2041 | static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) | |
2042 | { | |
2043 | const struct uvc_control_info *info = uvc_ctrls; | |
2044 | const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls); | |
2045 | const struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | |
2046 | const struct uvc_control_mapping *mend = | |
2047 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | |
2048 | ||
52c58ad6 LP |
2049 | /* XU controls initialization requires querying the device for control |
2050 | * information. As some buggy UVC devices will crash when queried | |
2051 | * repeatedly in a tight loop, delay XU controls initialization until | |
2052 | * first use. | |
2053 | */ | |
2054 | if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT) | |
ba2fa996 | 2055 | return; |
ba2fa996 LP |
2056 | |
2057 | for (; info < iend; ++info) { | |
2058 | if (uvc_entity_match_guid(ctrl->entity, info->entity) && | |
2059 | ctrl->index == info->index) { | |
2060 | uvc_ctrl_add_info(dev, ctrl, info); | |
2061 | break; | |
2062 | } | |
2063 | } | |
2064 | ||
071c8bb8 | 2065 | if (!ctrl->initialized) |
ba2fa996 LP |
2066 | return; |
2067 | ||
2068 | for (; mapping < mend; ++mapping) { | |
2069 | if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && | |
071c8bb8 | 2070 | ctrl->info.selector == mapping->selector) |
ba2fa996 LP |
2071 | __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
2072 | } | |
2073 | } | |
2074 | ||
c0efd232 LP |
2075 | /* |
2076 | * Initialize device controls. | |
2077 | */ | |
2078 | int uvc_ctrl_init_device(struct uvc_device *dev) | |
2079 | { | |
c0efd232 LP |
2080 | struct uvc_entity *entity; |
2081 | unsigned int i; | |
2082 | ||
2083 | /* Walk the entities list and instantiate controls */ | |
2084 | list_for_each_entry(entity, &dev->entities, list) { | |
ba2fa996 | 2085 | struct uvc_control *ctrl; |
9a601396 | 2086 | unsigned int bControlSize = 0, ncontrols; |
c0efd232 LP |
2087 | __u8 *bmControls = NULL; |
2088 | ||
b482d923 | 2089 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
2090 | bmControls = entity->extension.bmControls; |
2091 | bControlSize = entity->extension.bControlSize; | |
b482d923 | 2092 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { |
c0efd232 LP |
2093 | bmControls = entity->processing.bmControls; |
2094 | bControlSize = entity->processing.bControlSize; | |
b482d923 | 2095 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { |
c0efd232 LP |
2096 | bmControls = entity->camera.bmControls; |
2097 | bControlSize = entity->camera.bControlSize; | |
2098 | } | |
2099 | ||
ba2fa996 | 2100 | /* Remove bogus/blacklisted controls */ |
d732c44c | 2101 | uvc_ctrl_prune_entity(dev, entity); |
2bdd29cf | 2102 | |
ba2fa996 | 2103 | /* Count supported controls and allocate the controls array */ |
9a601396 | 2104 | ncontrols = memweight(bmControls, bControlSize); |
c0efd232 LP |
2105 | if (ncontrols == 0) |
2106 | continue; | |
2107 | ||
d0d97488 | 2108 | entity->controls = kcalloc(ncontrols, sizeof(*ctrl), |
ba2fa996 | 2109 | GFP_KERNEL); |
c0efd232 LP |
2110 | if (entity->controls == NULL) |
2111 | return -ENOMEM; | |
c0efd232 LP |
2112 | entity->ncontrols = ncontrols; |
2113 | ||
ba2fa996 | 2114 | /* Initialize all supported controls */ |
c0efd232 LP |
2115 | ctrl = entity->controls; |
2116 | for (i = 0; i < bControlSize * 8; ++i) { | |
2bdd29cf | 2117 | if (uvc_test_bit(bmControls, i) == 0) |
c0efd232 LP |
2118 | continue; |
2119 | ||
2120 | ctrl->entity = entity; | |
2121 | ctrl->index = i; | |
ba2fa996 LP |
2122 | |
2123 | uvc_ctrl_init_ctrl(dev, ctrl); | |
c0efd232 LP |
2124 | ctrl++; |
2125 | } | |
2126 | } | |
2127 | ||
c0efd232 LP |
2128 | return 0; |
2129 | } | |
2130 | ||
2131 | /* | |
2132 | * Cleanup device controls. | |
2133 | */ | |
ba2fa996 LP |
2134 | static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, |
2135 | struct uvc_control *ctrl) | |
c0efd232 | 2136 | { |
ba2fa996 | 2137 | struct uvc_control_mapping *mapping, *nm; |
c0efd232 | 2138 | |
071c8bb8 | 2139 | list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { |
ba2fa996 LP |
2140 | list_del(&mapping->list); |
2141 | kfree(mapping->menu_info); | |
2142 | kfree(mapping); | |
c0efd232 LP |
2143 | } |
2144 | } | |
2145 | ||
ba2fa996 | 2146 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) |
561474c2 | 2147 | { |
ba2fa996 LP |
2148 | struct uvc_entity *entity; |
2149 | unsigned int i; | |
561474c2 | 2150 | |
ba2fa996 LP |
2151 | /* Free controls and control mappings for all entities. */ |
2152 | list_for_each_entry(entity, &dev->entities, list) { | |
2153 | for (i = 0; i < entity->ncontrols; ++i) { | |
2154 | struct uvc_control *ctrl = &entity->controls[i]; | |
2155 | ||
071c8bb8 | 2156 | if (!ctrl->initialized) |
ba2fa996 | 2157 | continue; |
561474c2 | 2158 | |
ba2fa996 LP |
2159 | uvc_ctrl_cleanup_mappings(dev, ctrl); |
2160 | kfree(ctrl->uvc_data); | |
561474c2 LP |
2161 | } |
2162 | ||
ba2fa996 | 2163 | kfree(entity->controls); |
561474c2 LP |
2164 | } |
2165 | } |