Commit | Line | Data |
---|---|---|
c0efd232 LP |
1 | /* |
2 | * uvc_ctrl.c -- USB Video Class driver - Controls | |
3 | * | |
2c2d264b | 4 | * Copyright (C) 2005-2009 |
c0efd232 LP |
5 | * Laurent Pinchart (laurent.pinchart@skynet.be) |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
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> | |
23 | #include <asm/atomic.h> | |
24 | ||
25 | #include "uvcvideo.h" | |
26 | ||
c0efd232 LP |
27 | #define UVC_CTRL_DATA_CURRENT 0 |
28 | #define UVC_CTRL_DATA_BACKUP 1 | |
59529081 LP |
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 | |
c0efd232 LP |
34 | |
35 | /* ------------------------------------------------------------------------ | |
2c2d264b | 36 | * Controls |
c0efd232 LP |
37 | */ |
38 | ||
39 | static struct uvc_control_info uvc_ctrls[] = { | |
40 | { | |
41 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 42 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
43 | .index = 0, |
44 | .size = 2, | |
45 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
46 | | UVC_CONTROL_RESTORE, | |
47 | }, | |
48 | { | |
49 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 50 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
51 | .index = 1, |
52 | .size = 2, | |
53 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
54 | | UVC_CONTROL_RESTORE, | |
55 | }, | |
56 | { | |
57 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 58 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
59 | .index = 2, |
60 | .size = 2, | |
61 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
62 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
63 | }, | |
64 | { | |
65 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 66 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
67 | .index = 3, |
68 | .size = 2, | |
69 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
70 | | UVC_CONTROL_RESTORE, | |
71 | }, | |
72 | { | |
73 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 74 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
75 | .index = 4, |
76 | .size = 2, | |
77 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
78 | | UVC_CONTROL_RESTORE, | |
79 | }, | |
80 | { | |
81 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 82 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
83 | .index = 5, |
84 | .size = 2, | |
85 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
86 | | UVC_CONTROL_RESTORE, | |
87 | }, | |
5e26d50f LP |
88 | { |
89 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 90 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
5e26d50f LP |
91 | .index = 6, |
92 | .size = 2, | |
93 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
94 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
95 | }, | |
96 | { | |
97 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 98 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
5e26d50f LP |
99 | .index = 7, |
100 | .size = 4, | |
101 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
102 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
103 | }, | |
c0efd232 LP |
104 | { |
105 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 106 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
107 | .index = 8, |
108 | .size = 2, | |
109 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
110 | | UVC_CONTROL_RESTORE, | |
111 | }, | |
112 | { | |
113 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 114 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
115 | .index = 9, |
116 | .size = 2, | |
117 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
118 | | UVC_CONTROL_RESTORE, | |
119 | }, | |
120 | { | |
121 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 122 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
123 | .index = 10, |
124 | .size = 1, | |
125 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
126 | | UVC_CONTROL_RESTORE, | |
127 | }, | |
128 | { | |
129 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 130 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
131 | .index = 11, |
132 | .size = 1, | |
133 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
134 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, | |
135 | }, | |
5e26d50f LP |
136 | { |
137 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 138 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
5e26d50f LP |
139 | .index = 12, |
140 | .size = 1, | |
141 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
142 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, | |
143 | }, | |
144 | { | |
145 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 146 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
5e26d50f LP |
147 | .index = 13, |
148 | .size = 1, | |
149 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
150 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, | |
151 | }, | |
152 | { | |
153 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 154 | .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL, |
5e26d50f LP |
155 | .index = 14, |
156 | .size = 2, | |
157 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
158 | | UVC_CONTROL_RESTORE, | |
159 | }, | |
160 | { | |
161 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 162 | .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL, |
5e26d50f LP |
163 | .index = 15, |
164 | .size = 2, | |
165 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
166 | | UVC_CONTROL_RESTORE, | |
167 | }, | |
168 | { | |
169 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 170 | .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL, |
5e26d50f LP |
171 | .index = 16, |
172 | .size = 1, | |
173 | .flags = UVC_CONTROL_GET_CUR, | |
174 | }, | |
175 | { | |
176 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 177 | .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL, |
5e26d50f LP |
178 | .index = 17, |
179 | .size = 1, | |
180 | .flags = UVC_CONTROL_GET_CUR, | |
181 | }, | |
182 | { | |
183 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 184 | .selector = UVC_CT_SCANNING_MODE_CONTROL, |
5e26d50f LP |
185 | .index = 0, |
186 | .size = 1, | |
187 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
188 | | UVC_CONTROL_RESTORE, | |
189 | }, | |
c0efd232 LP |
190 | { |
191 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 192 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
193 | .index = 1, |
194 | .size = 1, | |
195 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
196 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_GET_RES | |
197 | | UVC_CONTROL_RESTORE, | |
198 | }, | |
199 | { | |
200 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 201 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
202 | .index = 2, |
203 | .size = 1, | |
204 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
205 | | UVC_CONTROL_RESTORE, | |
206 | }, | |
207 | { | |
208 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 209 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
210 | .index = 3, |
211 | .size = 4, | |
212 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
213 | | UVC_CONTROL_RESTORE, | |
214 | }, | |
5e26d50f LP |
215 | { |
216 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 217 | .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL, |
5e26d50f LP |
218 | .index = 4, |
219 | .size = 1, | |
a90ef69c | 220 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_RESTORE, |
5e26d50f | 221 | }, |
c0efd232 LP |
222 | { |
223 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 224 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
225 | .index = 5, |
226 | .size = 2, | |
227 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
228 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
229 | }, | |
230 | { | |
231 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 232 | .selector = UVC_CT_FOCUS_RELATIVE_CONTROL, |
5e26d50f LP |
233 | .index = 6, |
234 | .size = 2, | |
a90ef69c LP |
235 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN |
236 | | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | |
237 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE, | |
c0efd232 LP |
238 | }, |
239 | { | |
5e26d50f | 240 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 241 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, |
5e26d50f LP |
242 | .index = 7, |
243 | .size = 2, | |
244 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
245 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
246 | }, | |
247 | { | |
248 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 249 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, |
5e26d50f | 250 | .index = 8, |
c0efd232 | 251 | .size = 1, |
a90ef69c | 252 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_AUTO_UPDATE, |
c0efd232 LP |
253 | }, |
254 | { | |
5e26d50f | 255 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 256 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
5e26d50f | 257 | .index = 9, |
c0efd232 LP |
258 | .size = 2, |
259 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
260 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
261 | }, | |
262 | { | |
5e26d50f | 263 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 264 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
5e26d50f LP |
265 | .index = 10, |
266 | .size = 3, | |
a90ef69c LP |
267 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN |
268 | | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | |
269 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE, | |
5e26d50f LP |
270 | }, |
271 | { | |
272 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 273 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, |
5e26d50f LP |
274 | .index = 11, |
275 | .size = 8, | |
276 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
277 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
278 | }, | |
279 | { | |
280 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 281 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, |
5e26d50f LP |
282 | .index = 12, |
283 | .size = 4, | |
a90ef69c LP |
284 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN |
285 | | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | |
286 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE, | |
5e26d50f LP |
287 | }, |
288 | { | |
289 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 290 | .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL, |
c0efd232 | 291 | .index = 13, |
5e26d50f LP |
292 | .size = 2, |
293 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE | |
294 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, | |
295 | }, | |
296 | { | |
297 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 298 | .selector = UVC_CT_ROLL_RELATIVE_CONTROL, |
5e26d50f LP |
299 | .index = 14, |
300 | .size = 2, | |
a90ef69c LP |
301 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_MIN |
302 | | UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | |
303 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_AUTO_UPDATE, | |
5e26d50f LP |
304 | }, |
305 | { | |
306 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 307 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
5e26d50f | 308 | .index = 17, |
c0efd232 LP |
309 | .size = 1, |
310 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
311 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, | |
312 | }, | |
313 | { | |
5e26d50f | 314 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 315 | .selector = UVC_CT_PRIVACY_CONTROL, |
5e26d50f LP |
316 | .index = 18, |
317 | .size = 1, | |
318 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR | |
c0efd232 LP |
319 | | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, |
320 | }, | |
321 | }; | |
322 | ||
323 | static struct uvc_menu_info power_line_frequency_controls[] = { | |
324 | { 0, "Disabled" }, | |
325 | { 1, "50 Hz" }, | |
326 | { 2, "60 Hz" }, | |
327 | }; | |
328 | ||
329 | static struct uvc_menu_info exposure_auto_controls[] = { | |
c0efd232 | 330 | { 2, "Auto Mode" }, |
90ac5ea3 | 331 | { 1, "Manual Mode" }, |
c0efd232 LP |
332 | { 4, "Shutter Priority Mode" }, |
333 | { 8, "Aperture Priority Mode" }, | |
334 | }; | |
335 | ||
9768352a LP |
336 | static __s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, |
337 | __u8 query, const __u8 *data) | |
338 | { | |
339 | __s8 zoom = (__s8)data[0]; | |
340 | ||
341 | switch (query) { | |
b482d923 | 342 | case UVC_GET_CUR: |
9768352a LP |
343 | return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); |
344 | ||
b482d923 LP |
345 | case UVC_GET_MIN: |
346 | case UVC_GET_MAX: | |
347 | case UVC_GET_RES: | |
348 | case UVC_GET_DEF: | |
9768352a LP |
349 | default: |
350 | return data[2]; | |
351 | } | |
352 | } | |
353 | ||
354 | static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, | |
355 | __s32 value, __u8 *data) | |
356 | { | |
357 | data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
2e896133 | 358 | data[2] = min((int)abs(value), 0xff); |
9768352a LP |
359 | } |
360 | ||
c0efd232 LP |
361 | static struct uvc_control_mapping uvc_ctrl_mappings[] = { |
362 | { | |
363 | .id = V4L2_CID_BRIGHTNESS, | |
364 | .name = "Brightness", | |
365 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 366 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
367 | .size = 16, |
368 | .offset = 0, | |
369 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
370 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
371 | }, | |
372 | { | |
373 | .id = V4L2_CID_CONTRAST, | |
374 | .name = "Contrast", | |
375 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 376 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
377 | .size = 16, |
378 | .offset = 0, | |
379 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
380 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
381 | }, | |
382 | { | |
383 | .id = V4L2_CID_HUE, | |
384 | .name = "Hue", | |
385 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 386 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
387 | .size = 16, |
388 | .offset = 0, | |
389 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
390 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
391 | }, | |
392 | { | |
393 | .id = V4L2_CID_SATURATION, | |
394 | .name = "Saturation", | |
395 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 396 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
397 | .size = 16, |
398 | .offset = 0, | |
399 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
400 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
401 | }, | |
402 | { | |
403 | .id = V4L2_CID_SHARPNESS, | |
404 | .name = "Sharpness", | |
405 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 406 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
407 | .size = 16, |
408 | .offset = 0, | |
409 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
410 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
411 | }, | |
412 | { | |
413 | .id = V4L2_CID_GAMMA, | |
414 | .name = "Gamma", | |
415 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 416 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
417 | .size = 16, |
418 | .offset = 0, | |
419 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
420 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
421 | }, | |
422 | { | |
423 | .id = V4L2_CID_BACKLIGHT_COMPENSATION, | |
424 | .name = "Backlight Compensation", | |
425 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 426 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
427 | .size = 16, |
428 | .offset = 0, | |
429 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
430 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
431 | }, | |
432 | { | |
433 | .id = V4L2_CID_GAIN, | |
434 | .name = "Gain", | |
435 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 436 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
437 | .size = 16, |
438 | .offset = 0, | |
439 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
440 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
441 | }, | |
442 | { | |
443 | .id = V4L2_CID_POWER_LINE_FREQUENCY, | |
444 | .name = "Power Line Frequency", | |
445 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 446 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
447 | .size = 2, |
448 | .offset = 0, | |
449 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
450 | .data_type = UVC_CTRL_DATA_TYPE_ENUM, | |
451 | .menu_info = power_line_frequency_controls, | |
452 | .menu_count = ARRAY_SIZE(power_line_frequency_controls), | |
453 | }, | |
454 | { | |
455 | .id = V4L2_CID_HUE_AUTO, | |
456 | .name = "Hue, Auto", | |
457 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 458 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
459 | .size = 1, |
460 | .offset = 0, | |
461 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
462 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
463 | }, | |
464 | { | |
465 | .id = V4L2_CID_EXPOSURE_AUTO, | |
466 | .name = "Exposure, Auto", | |
467 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 468 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
469 | .size = 4, |
470 | .offset = 0, | |
471 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
472 | .data_type = UVC_CTRL_DATA_TYPE_BITMASK, | |
473 | .menu_info = exposure_auto_controls, | |
474 | .menu_count = ARRAY_SIZE(exposure_auto_controls), | |
475 | }, | |
476 | { | |
477 | .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, | |
478 | .name = "Exposure, Auto Priority", | |
479 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 480 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
481 | .size = 1, |
482 | .offset = 0, | |
483 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
484 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
485 | }, | |
486 | { | |
487 | .id = V4L2_CID_EXPOSURE_ABSOLUTE, | |
488 | .name = "Exposure (Absolute)", | |
489 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 490 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
491 | .size = 32, |
492 | .offset = 0, | |
493 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
494 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
495 | }, | |
496 | { | |
497 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
498 | .name = "White Balance Temperature, Auto", | |
499 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 500 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
c0efd232 LP |
501 | .size = 1, |
502 | .offset = 0, | |
503 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
504 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
505 | }, | |
506 | { | |
507 | .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, | |
508 | .name = "White Balance Temperature", | |
509 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 510 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
c0efd232 LP |
511 | .size = 16, |
512 | .offset = 0, | |
513 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
514 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
515 | }, | |
516 | { | |
517 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
518 | .name = "White Balance Component, Auto", | |
519 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 520 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
c0efd232 LP |
521 | .size = 1, |
522 | .offset = 0, | |
523 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
524 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
525 | }, | |
526 | { | |
527 | .id = V4L2_CID_BLUE_BALANCE, | |
528 | .name = "White Balance Blue Component", | |
529 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 530 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
531 | .size = 16, |
532 | .offset = 0, | |
533 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
534 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
535 | }, | |
536 | { | |
537 | .id = V4L2_CID_RED_BALANCE, | |
538 | .name = "White Balance Red Component", | |
539 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 540 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
541 | .size = 16, |
542 | .offset = 16, | |
543 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
544 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
545 | }, | |
546 | { | |
547 | .id = V4L2_CID_FOCUS_ABSOLUTE, | |
548 | .name = "Focus (absolute)", | |
549 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 550 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
551 | .size = 16, |
552 | .offset = 0, | |
553 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
554 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
555 | }, | |
556 | { | |
557 | .id = V4L2_CID_FOCUS_AUTO, | |
558 | .name = "Focus, Auto", | |
559 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 560 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
c0efd232 LP |
561 | .size = 1, |
562 | .offset = 0, | |
563 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
564 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
565 | }, | |
35a00c41 LP |
566 | { |
567 | .id = V4L2_CID_IRIS_ABSOLUTE, | |
568 | .name = "Iris, Absolute", | |
569 | .entity = UVC_GUID_UVC_CAMERA, | |
570 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | |
571 | .size = 16, | |
572 | .offset = 0, | |
573 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
574 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
575 | }, | |
576 | { | |
577 | .id = V4L2_CID_IRIS_RELATIVE, | |
578 | .name = "Iris, Relative", | |
579 | .entity = UVC_GUID_UVC_CAMERA, | |
580 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | |
581 | .size = 8, | |
582 | .offset = 0, | |
583 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
584 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
585 | }, | |
9768352a LP |
586 | { |
587 | .id = V4L2_CID_ZOOM_ABSOLUTE, | |
588 | .name = "Zoom, Absolute", | |
589 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 590 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
9768352a LP |
591 | .size = 16, |
592 | .offset = 0, | |
593 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
594 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
595 | }, | |
596 | { | |
597 | .id = V4L2_CID_ZOOM_CONTINUOUS, | |
598 | .name = "Zoom, Continuous", | |
599 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 600 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
9768352a LP |
601 | .size = 0, |
602 | .offset = 0, | |
603 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
604 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
605 | .get = uvc_ctrl_get_zoom, | |
606 | .set = uvc_ctrl_set_zoom, | |
607 | }, | |
6df126f8 LP |
608 | { |
609 | .id = V4L2_CID_PRIVACY, | |
610 | .name = "Privacy", | |
611 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 612 | .selector = UVC_CT_PRIVACY_CONTROL, |
6df126f8 LP |
613 | .size = 1, |
614 | .offset = 0, | |
615 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
616 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
617 | }, | |
c0efd232 LP |
618 | }; |
619 | ||
620 | /* ------------------------------------------------------------------------ | |
621 | * Utility functions | |
622 | */ | |
623 | ||
624 | static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) | |
625 | { | |
626 | return ctrl->data + id * ctrl->info->size; | |
627 | } | |
628 | ||
2bdd29cf | 629 | static inline int uvc_test_bit(const __u8 *data, int bit) |
c0efd232 LP |
630 | { |
631 | return (data[bit >> 3] >> (bit & 7)) & 1; | |
632 | } | |
633 | ||
2bdd29cf LP |
634 | static inline void uvc_clear_bit(__u8 *data, int bit) |
635 | { | |
636 | data[bit >> 3] &= ~(1 << (bit & 7)); | |
637 | } | |
638 | ||
c0efd232 LP |
639 | /* Extract the bit string specified by mapping->offset and mapping->size |
640 | * from the little-endian data stored at 'data' and return the result as | |
641 | * a signed 32bit integer. Sign extension will be performed if the mapping | |
642 | * references a signed data type. | |
643 | */ | |
9768352a LP |
644 | static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping, |
645 | __u8 query, const __u8 *data) | |
c0efd232 LP |
646 | { |
647 | int bits = mapping->size; | |
648 | int offset = mapping->offset; | |
649 | __s32 value = 0; | |
650 | __u8 mask; | |
651 | ||
652 | data += offset / 8; | |
653 | offset &= 7; | |
654 | mask = ((1LL << bits) - 1) << offset; | |
655 | ||
656 | for (; bits > 0; data++) { | |
657 | __u8 byte = *data & mask; | |
658 | value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); | |
659 | bits -= 8 - (offset > 0 ? offset : 0); | |
660 | offset -= 8; | |
661 | mask = (1 << bits) - 1; | |
662 | } | |
663 | ||
2c2d264b | 664 | /* Sign-extend the value if needed. */ |
c0efd232 LP |
665 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
666 | value |= -(value & (1 << (mapping->size - 1))); | |
667 | ||
668 | return value; | |
669 | } | |
670 | ||
671 | /* Set the bit string specified by mapping->offset and mapping->size | |
672 | * in the little-endian data stored at 'data' to the value 'value'. | |
673 | */ | |
9768352a LP |
674 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, |
675 | __s32 value, __u8 *data) | |
c0efd232 LP |
676 | { |
677 | int bits = mapping->size; | |
678 | int offset = mapping->offset; | |
679 | __u8 mask; | |
680 | ||
681 | data += offset / 8; | |
682 | offset &= 7; | |
683 | ||
684 | for (; bits > 0; data++) { | |
685 | mask = ((1LL << bits) - 1) << offset; | |
686 | *data = (*data & ~mask) | ((value << offset) & mask); | |
687 | value >>= offset ? offset : 8; | |
688 | bits -= 8 - offset; | |
689 | offset = 0; | |
690 | } | |
691 | } | |
692 | ||
693 | /* ------------------------------------------------------------------------ | |
694 | * Terminal and unit management | |
695 | */ | |
696 | ||
697 | static const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; | |
698 | static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; | |
699 | static const __u8 uvc_media_transport_input_guid[16] = | |
700 | UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; | |
701 | ||
702 | static int uvc_entity_match_guid(struct uvc_entity *entity, __u8 guid[16]) | |
703 | { | |
704 | switch (UVC_ENTITY_TYPE(entity)) { | |
b482d923 | 705 | case UVC_ITT_CAMERA: |
c0efd232 LP |
706 | return memcmp(uvc_camera_guid, guid, 16) == 0; |
707 | ||
b482d923 | 708 | case UVC_ITT_MEDIA_TRANSPORT_INPUT: |
c0efd232 LP |
709 | return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
710 | ||
b482d923 | 711 | case UVC_VC_PROCESSING_UNIT: |
c0efd232 LP |
712 | return memcmp(uvc_processing_guid, guid, 16) == 0; |
713 | ||
b482d923 | 714 | case UVC_VC_EXTENSION_UNIT: |
c0efd232 LP |
715 | return memcmp(entity->extension.guidExtensionCode, |
716 | guid, 16) == 0; | |
717 | ||
718 | default: | |
719 | return 0; | |
720 | } | |
721 | } | |
722 | ||
723 | /* ------------------------------------------------------------------------ | |
724 | * UVC Controls | |
725 | */ | |
726 | ||
727 | static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, | |
728 | struct uvc_control_mapping **mapping, struct uvc_control **control, | |
729 | int next) | |
730 | { | |
731 | struct uvc_control *ctrl; | |
732 | struct uvc_control_mapping *map; | |
733 | unsigned int i; | |
734 | ||
735 | if (entity == NULL) | |
736 | return; | |
737 | ||
738 | for (i = 0; i < entity->ncontrols; ++i) { | |
739 | ctrl = &entity->controls[i]; | |
740 | if (ctrl->info == NULL) | |
741 | continue; | |
742 | ||
743 | list_for_each_entry(map, &ctrl->info->mappings, list) { | |
744 | if ((map->id == v4l2_id) && !next) { | |
745 | *control = ctrl; | |
746 | *mapping = map; | |
747 | return; | |
748 | } | |
749 | ||
750 | if ((*mapping == NULL || (*mapping)->id > map->id) && | |
751 | (map->id > v4l2_id) && next) { | |
752 | *control = ctrl; | |
753 | *mapping = map; | |
754 | } | |
755 | } | |
756 | } | |
757 | } | |
758 | ||
8e113595 | 759 | struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, |
c0efd232 LP |
760 | __u32 v4l2_id, struct uvc_control_mapping **mapping) |
761 | { | |
762 | struct uvc_control *ctrl = NULL; | |
763 | struct uvc_entity *entity; | |
764 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | |
765 | ||
766 | *mapping = NULL; | |
767 | ||
768 | /* Mask the query flags. */ | |
769 | v4l2_id &= V4L2_CTRL_ID_MASK; | |
770 | ||
771 | /* Find the control. */ | |
6241d8ca | 772 | list_for_each_entry(entity, &chain->entities, chain) { |
c0efd232 LP |
773 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
774 | if (ctrl && !next) | |
775 | return ctrl; | |
776 | } | |
777 | ||
778 | if (ctrl == NULL && !next) | |
779 | uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", | |
780 | v4l2_id); | |
781 | ||
782 | return ctrl; | |
783 | } | |
784 | ||
59529081 LP |
785 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, |
786 | struct uvc_control *ctrl) | |
787 | { | |
788 | int ret; | |
789 | ||
790 | if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { | |
791 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, | |
792 | chain->dev->intfnum, ctrl->info->selector, | |
793 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), | |
794 | ctrl->info->size); | |
795 | if (ret < 0) | |
796 | return ret; | |
797 | } | |
798 | ||
799 | if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { | |
800 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, | |
801 | chain->dev->intfnum, ctrl->info->selector, | |
802 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), | |
803 | ctrl->info->size); | |
804 | if (ret < 0) | |
805 | return ret; | |
806 | } | |
807 | if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { | |
808 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, | |
809 | chain->dev->intfnum, ctrl->info->selector, | |
810 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), | |
811 | ctrl->info->size); | |
812 | if (ret < 0) | |
813 | return ret; | |
814 | } | |
815 | if (ctrl->info->flags & UVC_CONTROL_GET_RES) { | |
816 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, | |
817 | chain->dev->intfnum, ctrl->info->selector, | |
818 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), | |
819 | ctrl->info->size); | |
820 | if (ret < 0) | |
821 | return ret; | |
822 | } | |
823 | ||
824 | ctrl->cached = 1; | |
825 | return 0; | |
826 | } | |
827 | ||
8e113595 | 828 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, |
c0efd232 LP |
829 | struct v4l2_queryctrl *v4l2_ctrl) |
830 | { | |
831 | struct uvc_control *ctrl; | |
832 | struct uvc_control_mapping *mapping; | |
833 | struct uvc_menu_info *menu; | |
834 | unsigned int i; | |
c0efd232 LP |
835 | int ret; |
836 | ||
8e113595 | 837 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); |
c0efd232 LP |
838 | if (ctrl == NULL) |
839 | return -EINVAL; | |
840 | ||
54812c77 | 841 | memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); |
c0efd232 LP |
842 | v4l2_ctrl->id = mapping->id; |
843 | v4l2_ctrl->type = mapping->v4l2_type; | |
d0ebf307 | 844 | strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); |
c0efd232 LP |
845 | v4l2_ctrl->flags = 0; |
846 | ||
a90ef69c LP |
847 | if (!(ctrl->info->flags & UVC_CONTROL_GET_CUR)) |
848 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
c0efd232 LP |
849 | if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR)) |
850 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
851 | ||
59529081 LP |
852 | if (!ctrl->cached) { |
853 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
b482d923 | 854 | if (ret < 0) |
59529081 LP |
855 | return ret; |
856 | } | |
857 | ||
858 | if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { | |
859 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, | |
860 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | |
c0efd232 LP |
861 | } |
862 | ||
54812c77 LP |
863 | switch (mapping->v4l2_type) { |
864 | case V4L2_CTRL_TYPE_MENU: | |
c0efd232 LP |
865 | v4l2_ctrl->minimum = 0; |
866 | v4l2_ctrl->maximum = mapping->menu_count - 1; | |
867 | v4l2_ctrl->step = 1; | |
868 | ||
869 | menu = mapping->menu_info; | |
870 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
871 | if (menu->value == v4l2_ctrl->default_value) { | |
872 | v4l2_ctrl->default_value = i; | |
873 | break; | |
874 | } | |
875 | } | |
876 | ||
59529081 | 877 | return 0; |
54812c77 LP |
878 | |
879 | case V4L2_CTRL_TYPE_BOOLEAN: | |
880 | v4l2_ctrl->minimum = 0; | |
881 | v4l2_ctrl->maximum = 1; | |
882 | v4l2_ctrl->step = 1; | |
59529081 | 883 | return 0; |
54812c77 | 884 | |
f4eabafe LP |
885 | case V4L2_CTRL_TYPE_BUTTON: |
886 | v4l2_ctrl->minimum = 0; | |
887 | v4l2_ctrl->maximum = 0; | |
888 | v4l2_ctrl->step = 0; | |
59529081 | 889 | return 0; |
f4eabafe | 890 | |
54812c77 LP |
891 | default: |
892 | break; | |
c0efd232 LP |
893 | } |
894 | ||
59529081 LP |
895 | if (ctrl->info->flags & UVC_CONTROL_GET_MIN) |
896 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, | |
897 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
c0efd232 | 898 | |
59529081 LP |
899 | if (ctrl->info->flags & UVC_CONTROL_GET_MAX) |
900 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, | |
901 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
902 | ||
903 | if (ctrl->info->flags & UVC_CONTROL_GET_RES) | |
904 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, | |
905 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
906 | ||
907 | return 0; | |
c0efd232 LP |
908 | } |
909 | ||
910 | ||
911 | /* -------------------------------------------------------------------------- | |
912 | * Control transactions | |
913 | * | |
914 | * To make extended set operations as atomic as the hardware allows, controls | |
915 | * are handled using begin/commit/rollback operations. | |
916 | * | |
917 | * At the beginning of a set request, uvc_ctrl_begin should be called to | |
918 | * initialize the request. This function acquires the control lock. | |
919 | * | |
920 | * When setting a control, the new value is stored in the control data field | |
921 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | |
922 | * later processing. If the UVC and V4L2 control sizes differ, the current | |
923 | * value is loaded from the hardware before storing the new value in the data | |
924 | * field. | |
925 | * | |
926 | * After processing all controls in the transaction, uvc_ctrl_commit or | |
927 | * uvc_ctrl_rollback must be called to apply the pending changes to the | |
928 | * hardware or revert them. When applying changes, all controls marked as | |
929 | * dirty will be modified in the UVC device, and the dirty flag will be | |
930 | * cleared. When reverting controls, the control data field | |
931 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | |
932 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | |
933 | * control lock. | |
934 | */ | |
8e113595 | 935 | int uvc_ctrl_begin(struct uvc_video_chain *chain) |
c0efd232 | 936 | { |
8e113595 | 937 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; |
c0efd232 LP |
938 | } |
939 | ||
940 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | |
941 | struct uvc_entity *entity, int rollback) | |
942 | { | |
943 | struct uvc_control *ctrl; | |
944 | unsigned int i; | |
945 | int ret; | |
946 | ||
947 | if (entity == NULL) | |
948 | return 0; | |
949 | ||
950 | for (i = 0; i < entity->ncontrols; ++i) { | |
951 | ctrl = &entity->controls[i]; | |
b1accfa1 LP |
952 | if (ctrl->info == NULL) |
953 | continue; | |
954 | ||
955 | /* Reset the loaded flag for auto-update controls that were | |
956 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | |
957 | * uvc_ctrl_get from using the cached value. | |
958 | */ | |
959 | if (ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) | |
960 | ctrl->loaded = 0; | |
961 | ||
962 | if (!ctrl->dirty) | |
c0efd232 LP |
963 | continue; |
964 | ||
965 | if (!rollback) | |
b482d923 | 966 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, |
c0efd232 LP |
967 | dev->intfnum, ctrl->info->selector, |
968 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
969 | ctrl->info->size); | |
970 | else | |
971 | ret = 0; | |
972 | ||
973 | if (rollback || ret < 0) | |
974 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
975 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
976 | ctrl->info->size); | |
977 | ||
c0efd232 LP |
978 | ctrl->dirty = 0; |
979 | ||
980 | if (ret < 0) | |
981 | return ret; | |
982 | } | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
8e113595 | 987 | int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) |
c0efd232 LP |
988 | { |
989 | struct uvc_entity *entity; | |
990 | int ret = 0; | |
991 | ||
992 | /* Find the control. */ | |
6241d8ca | 993 | list_for_each_entry(entity, &chain->entities, chain) { |
8e113595 | 994 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); |
c0efd232 LP |
995 | if (ret < 0) |
996 | goto done; | |
997 | } | |
998 | ||
999 | done: | |
8e113595 | 1000 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1001 | return ret; |
1002 | } | |
1003 | ||
8e113595 | 1004 | int uvc_ctrl_get(struct uvc_video_chain *chain, |
c0efd232 LP |
1005 | struct v4l2_ext_control *xctrl) |
1006 | { | |
1007 | struct uvc_control *ctrl; | |
1008 | struct uvc_control_mapping *mapping; | |
1009 | struct uvc_menu_info *menu; | |
1010 | unsigned int i; | |
1011 | int ret; | |
1012 | ||
8e113595 | 1013 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
c0efd232 LP |
1014 | if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) |
1015 | return -EINVAL; | |
1016 | ||
1017 | if (!ctrl->loaded) { | |
8e113595 LP |
1018 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, |
1019 | chain->dev->intfnum, ctrl->info->selector, | |
c0efd232 LP |
1020 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
1021 | ctrl->info->size); | |
1022 | if (ret < 0) | |
1023 | return ret; | |
1024 | ||
b1accfa1 | 1025 | ctrl->loaded = 1; |
c0efd232 LP |
1026 | } |
1027 | ||
b482d923 | 1028 | xctrl->value = mapping->get(mapping, UVC_GET_CUR, |
9768352a | 1029 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); |
c0efd232 LP |
1030 | |
1031 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { | |
1032 | menu = mapping->menu_info; | |
1033 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
1034 | if (menu->value == xctrl->value) { | |
1035 | xctrl->value = i; | |
1036 | break; | |
1037 | } | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
8e113595 | 1044 | int uvc_ctrl_set(struct uvc_video_chain *chain, |
c0efd232 LP |
1045 | struct v4l2_ext_control *xctrl) |
1046 | { | |
1047 | struct uvc_control *ctrl; | |
1048 | struct uvc_control_mapping *mapping; | |
e54532e5 LP |
1049 | s32 value; |
1050 | u32 step; | |
1051 | s32 min; | |
1052 | s32 max; | |
c0efd232 LP |
1053 | int ret; |
1054 | ||
8e113595 | 1055 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
c0efd232 LP |
1056 | if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0) |
1057 | return -EINVAL; | |
1058 | ||
e54532e5 LP |
1059 | /* Clamp out of range values. */ |
1060 | switch (mapping->v4l2_type) { | |
1061 | case V4L2_CTRL_TYPE_INTEGER: | |
1062 | if (!ctrl->cached) { | |
1063 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1064 | if (ret < 0) | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | min = mapping->get(mapping, UVC_GET_MIN, | |
1069 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
1070 | max = mapping->get(mapping, UVC_GET_MAX, | |
1071 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1072 | step = mapping->get(mapping, UVC_GET_RES, | |
1073 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
cf7a50ee LP |
1074 | if (step == 0) |
1075 | step = 1; | |
e54532e5 LP |
1076 | |
1077 | xctrl->value = min + (xctrl->value - min + step/2) / step * step; | |
1078 | xctrl->value = clamp(xctrl->value, min, max); | |
1079 | value = xctrl->value; | |
1080 | break; | |
1081 | ||
1082 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1083 | xctrl->value = clamp(xctrl->value, 0, 1); | |
1084 | value = xctrl->value; | |
1085 | break; | |
1086 | ||
1087 | case V4L2_CTRL_TYPE_MENU: | |
1088 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | |
8a4e76c1 | 1089 | return -ERANGE; |
e54532e5 LP |
1090 | value = mapping->menu_info[xctrl->value].value; |
1091 | break; | |
1092 | ||
1093 | default: | |
1094 | value = xctrl->value; | |
1095 | break; | |
c0efd232 LP |
1096 | } |
1097 | ||
e54532e5 LP |
1098 | /* If the mapping doesn't span the whole UVC control, the current value |
1099 | * needs to be loaded from the device to perform the read-modify-write | |
1100 | * operation. | |
1101 | */ | |
c0efd232 LP |
1102 | if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) { |
1103 | if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) { | |
1104 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1105 | 0, ctrl->info->size); | |
1106 | } else { | |
8e113595 LP |
1107 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
1108 | ctrl->entity->id, chain->dev->intfnum, | |
c0efd232 LP |
1109 | ctrl->info->selector, |
1110 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1111 | ctrl->info->size); | |
1112 | if (ret < 0) | |
1113 | return ret; | |
1114 | } | |
1115 | ||
b1accfa1 | 1116 | ctrl->loaded = 1; |
c0efd232 LP |
1117 | } |
1118 | ||
e54532e5 | 1119 | /* Backup the current value in case we need to rollback later. */ |
c0efd232 LP |
1120 | if (!ctrl->dirty) { |
1121 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1122 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1123 | ctrl->info->size); | |
1124 | } | |
1125 | ||
9768352a LP |
1126 | mapping->set(mapping, value, |
1127 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
c0efd232 LP |
1128 | |
1129 | ctrl->dirty = 1; | |
1130 | ctrl->modified = 1; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | /* -------------------------------------------------------------------------- | |
1135 | * Dynamic controls | |
1136 | */ | |
1137 | ||
8e113595 | 1138 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, |
c0efd232 LP |
1139 | struct uvc_xu_control *xctrl, int set) |
1140 | { | |
1141 | struct uvc_entity *entity; | |
1142 | struct uvc_control *ctrl = NULL; | |
1143 | unsigned int i, found = 0; | |
1144 | __u8 *data; | |
1145 | int ret; | |
1146 | ||
1147 | /* Find the extension unit. */ | |
6241d8ca LP |
1148 | list_for_each_entry(entity, &chain->entities, chain) { |
1149 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | |
1150 | entity->id == xctrl->unit) | |
c0efd232 LP |
1151 | break; |
1152 | } | |
1153 | ||
1154 | if (entity->id != xctrl->unit) { | |
1155 | uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", | |
1156 | xctrl->unit); | |
1157 | return -EINVAL; | |
1158 | } | |
1159 | ||
1160 | /* Find the control. */ | |
1161 | for (i = 0; i < entity->ncontrols; ++i) { | |
1162 | ctrl = &entity->controls[i]; | |
1163 | if (ctrl->info == NULL) | |
1164 | continue; | |
1165 | ||
1166 | if (ctrl->info->selector == xctrl->selector) { | |
1167 | found = 1; | |
1168 | break; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | if (!found) { | |
36bd883e LP |
1173 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", |
1174 | entity->extension.guidExtensionCode, xctrl->selector); | |
c0efd232 LP |
1175 | return -EINVAL; |
1176 | } | |
1177 | ||
1178 | /* Validate control data size. */ | |
1179 | if (ctrl->info->size != xctrl->size) | |
1180 | return -EINVAL; | |
1181 | ||
1182 | if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) || | |
1183 | (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR))) | |
1184 | return -EINVAL; | |
1185 | ||
8e113595 | 1186 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
c0efd232 LP |
1187 | return -ERESTARTSYS; |
1188 | ||
1189 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1190 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1191 | xctrl->size); | |
1192 | data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); | |
1193 | ||
1194 | if (set && copy_from_user(data, xctrl->data, xctrl->size)) { | |
1195 | ret = -EFAULT; | |
1196 | goto out; | |
1197 | } | |
1198 | ||
8e113595 LP |
1199 | ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR, |
1200 | xctrl->unit, chain->dev->intfnum, xctrl->selector, | |
b482d923 | 1201 | data, xctrl->size); |
c0efd232 LP |
1202 | if (ret < 0) |
1203 | goto out; | |
1204 | ||
1205 | if (!set && copy_to_user(xctrl->data, data, xctrl->size)) { | |
1206 | ret = -EFAULT; | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | out: | |
1211 | if (ret) | |
1212 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1213 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1214 | xctrl->size); | |
1215 | ||
8e113595 | 1216 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1217 | return ret; |
1218 | } | |
1219 | ||
1220 | /* -------------------------------------------------------------------------- | |
1221 | * Suspend/resume | |
1222 | */ | |
1223 | ||
1224 | /* | |
1225 | * Restore control values after resume, skipping controls that haven't been | |
1226 | * changed. | |
1227 | * | |
1228 | * TODO | |
1229 | * - Don't restore modified controls that are back to their default value. | |
1230 | * - Handle restore order (Auto-Exposure Mode should be restored before | |
1231 | * Exposure Time). | |
1232 | */ | |
1233 | int uvc_ctrl_resume_device(struct uvc_device *dev) | |
1234 | { | |
1235 | struct uvc_control *ctrl; | |
1236 | struct uvc_entity *entity; | |
1237 | unsigned int i; | |
1238 | int ret; | |
1239 | ||
1240 | /* Walk the entities list and restore controls when possible. */ | |
1241 | list_for_each_entry(entity, &dev->entities, list) { | |
1242 | ||
1243 | for (i = 0; i < entity->ncontrols; ++i) { | |
1244 | ctrl = &entity->controls[i]; | |
1245 | ||
1246 | if (ctrl->info == NULL || !ctrl->modified || | |
1247 | (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0) | |
1248 | continue; | |
1249 | ||
36bd883e LP |
1250 | printk(KERN_INFO "restoring control %pUl/%u/%u\n", |
1251 | ctrl->info->entity, ctrl->info->index, | |
1252 | ctrl->info->selector); | |
c0efd232 LP |
1253 | ctrl->dirty = 1; |
1254 | } | |
1255 | ||
1256 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | |
1257 | if (ret < 0) | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | /* -------------------------------------------------------------------------- | |
1265 | * Control and mapping handling | |
1266 | */ | |
1267 | ||
1268 | static void uvc_ctrl_add_ctrl(struct uvc_device *dev, | |
1269 | struct uvc_control_info *info) | |
1270 | { | |
1271 | struct uvc_entity *entity; | |
1272 | struct uvc_control *ctrl = NULL; | |
1273 | int ret, found = 0; | |
1274 | unsigned int i; | |
1275 | ||
1276 | list_for_each_entry(entity, &dev->entities, list) { | |
1277 | if (!uvc_entity_match_guid(entity, info->entity)) | |
1278 | continue; | |
1279 | ||
1280 | for (i = 0; i < entity->ncontrols; ++i) { | |
1281 | ctrl = &entity->controls[i]; | |
1282 | if (ctrl->index == info->index) { | |
1283 | found = 1; | |
1284 | break; | |
1285 | } | |
1286 | } | |
1287 | ||
1288 | if (found) | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | if (!found) | |
1293 | return; | |
1294 | ||
b482d923 | 1295 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
1296 | /* Check if the device control information and length match |
1297 | * the user supplied information. | |
1298 | */ | |
1299 | __u32 flags; | |
1300 | __le16 size; | |
1301 | __u8 inf; | |
1302 | ||
b482d923 LP |
1303 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, |
1304 | dev->intfnum, info->selector, (__u8 *)&size, 2); | |
1305 | if (ret < 0) { | |
36bd883e LP |
1306 | uvc_trace(UVC_TRACE_CONTROL, |
1307 | "GET_LEN failed on control %pUl/%u (%d).\n", | |
1308 | info->entity, info->selector, ret); | |
c0efd232 LP |
1309 | return; |
1310 | } | |
1311 | ||
1312 | if (info->size != le16_to_cpu(size)) { | |
36bd883e LP |
1313 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u size " |
1314 | "doesn't match user supplied value.\n", | |
1315 | info->entity, info->selector); | |
c0efd232 LP |
1316 | return; |
1317 | } | |
1318 | ||
b482d923 LP |
1319 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, |
1320 | dev->intfnum, info->selector, &inf, 1); | |
1321 | if (ret < 0) { | |
36bd883e LP |
1322 | uvc_trace(UVC_TRACE_CONTROL, |
1323 | "GET_INFO failed on control %pUl/%u (%d).\n", | |
1324 | info->entity, info->selector, ret); | |
c0efd232 LP |
1325 | return; |
1326 | } | |
1327 | ||
1328 | flags = info->flags; | |
1329 | if (((flags & UVC_CONTROL_GET_CUR) && !(inf & (1 << 0))) || | |
1330 | ((flags & UVC_CONTROL_SET_CUR) && !(inf & (1 << 1)))) { | |
36bd883e LP |
1331 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u flags " |
1332 | "don't match supported operations.\n", | |
1333 | info->entity, info->selector); | |
c0efd232 LP |
1334 | return; |
1335 | } | |
1336 | } | |
1337 | ||
1338 | ctrl->info = info; | |
59529081 | 1339 | ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_DATA_LAST, GFP_KERNEL); |
36bd883e LP |
1340 | uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " |
1341 | "entity %u\n", ctrl->info->entity, ctrl->info->selector, | |
1342 | dev->udev->devpath, entity->id); | |
c0efd232 LP |
1343 | } |
1344 | ||
1345 | /* | |
1346 | * Add an item to the UVC control information list, and instantiate a control | |
1347 | * structure for each device that supports the control. | |
1348 | */ | |
1349 | int uvc_ctrl_add_info(struct uvc_control_info *info) | |
1350 | { | |
1351 | struct uvc_control_info *ctrl; | |
1352 | struct uvc_device *dev; | |
1353 | int ret = 0; | |
1354 | ||
1355 | /* Find matching controls by walking the devices, entities and | |
1356 | * controls list. | |
1357 | */ | |
1358 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1359 | ||
1360 | /* First check if the list contains a control matching the new one. | |
1361 | * Bail out if it does. | |
1362 | */ | |
1363 | list_for_each_entry(ctrl, &uvc_driver.controls, list) { | |
1364 | if (memcmp(ctrl->entity, info->entity, 16)) | |
1365 | continue; | |
1366 | ||
1367 | if (ctrl->selector == info->selector) { | |
36bd883e LP |
1368 | uvc_trace(UVC_TRACE_CONTROL, |
1369 | "Control %pUl/%u is already defined.\n", | |
1370 | info->entity, info->selector); | |
c0efd232 LP |
1371 | ret = -EEXIST; |
1372 | goto end; | |
1373 | } | |
1374 | if (ctrl->index == info->index) { | |
36bd883e LP |
1375 | uvc_trace(UVC_TRACE_CONTROL, |
1376 | "Control %pUl/%u would overwrite index %d.\n", | |
1377 | info->entity, info->selector, info->index); | |
c0efd232 LP |
1378 | ret = -EEXIST; |
1379 | goto end; | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | list_for_each_entry(dev, &uvc_driver.devices, list) | |
1384 | uvc_ctrl_add_ctrl(dev, info); | |
1385 | ||
1386 | INIT_LIST_HEAD(&info->mappings); | |
1387 | list_add_tail(&info->list, &uvc_driver.controls); | |
1388 | end: | |
1389 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1390 | return ret; | |
1391 | } | |
1392 | ||
1393 | int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping) | |
1394 | { | |
1395 | struct uvc_control_info *info; | |
1396 | struct uvc_control_mapping *map; | |
1397 | int ret = -EINVAL; | |
1398 | ||
9768352a LP |
1399 | if (mapping->get == NULL) |
1400 | mapping->get = uvc_get_le_value; | |
1401 | if (mapping->set == NULL) | |
1402 | mapping->set = uvc_set_le_value; | |
1403 | ||
c0efd232 LP |
1404 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
1405 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with " | |
1406 | "invalid control id 0x%08x\n", mapping->name, | |
1407 | mapping->id); | |
1408 | return -EINVAL; | |
1409 | } | |
1410 | ||
1411 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1412 | list_for_each_entry(info, &uvc_driver.controls, list) { | |
1413 | if (memcmp(info->entity, mapping->entity, 16) || | |
1414 | info->selector != mapping->selector) | |
1415 | continue; | |
1416 | ||
1417 | if (info->size * 8 < mapping->size + mapping->offset) { | |
36bd883e LP |
1418 | uvc_trace(UVC_TRACE_CONTROL, |
1419 | "Mapping '%s' would overflow control %pUl/%u\n", | |
1420 | mapping->name, info->entity, info->selector); | |
c0efd232 LP |
1421 | ret = -EOVERFLOW; |
1422 | goto end; | |
1423 | } | |
1424 | ||
1425 | /* Check if the list contains a mapping matching the new one. | |
1426 | * Bail out if it does. | |
1427 | */ | |
1428 | list_for_each_entry(map, &info->mappings, list) { | |
1429 | if (map->id == mapping->id) { | |
1430 | uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is " | |
1431 | "already defined.\n", mapping->name); | |
1432 | ret = -EEXIST; | |
1433 | goto end; | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | mapping->ctrl = info; | |
1438 | list_add_tail(&mapping->list, &info->mappings); | |
36bd883e LP |
1439 | uvc_trace(UVC_TRACE_CONTROL, |
1440 | "Adding mapping %s to control %pUl/%u.\n", | |
1441 | mapping->name, info->entity, info->selector); | |
c0efd232 LP |
1442 | |
1443 | ret = 0; | |
1444 | break; | |
1445 | } | |
1446 | end: | |
1447 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1448 | return ret; | |
1449 | } | |
1450 | ||
2bdd29cf | 1451 | /* |
d732c44c LP |
1452 | * Prune an entity of its bogus controls using a blacklist. Bogus controls |
1453 | * are currently the ones that crash the camera or unconditionally return an | |
1454 | * error when queried. | |
2bdd29cf LP |
1455 | */ |
1456 | static void | |
d732c44c | 1457 | uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity) |
2bdd29cf LP |
1458 | { |
1459 | static const struct { | |
d732c44c LP |
1460 | struct usb_device_id id; |
1461 | u8 index; | |
2bdd29cf | 1462 | } blacklist[] = { |
9405e3cb | 1463 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ |
d732c44c LP |
1464 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ |
1465 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | |
2bdd29cf LP |
1466 | }; |
1467 | ||
1468 | u8 *controls; | |
1469 | unsigned int size; | |
1470 | unsigned int i; | |
1471 | ||
b482d923 | 1472 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_PROCESSING_UNIT) |
2bdd29cf LP |
1473 | return; |
1474 | ||
1475 | controls = entity->processing.bmControls; | |
1476 | size = entity->processing.bControlSize; | |
1477 | ||
1478 | for (i = 0; i < ARRAY_SIZE(blacklist); ++i) { | |
385097e0 | 1479 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) |
2bdd29cf LP |
1480 | continue; |
1481 | ||
d732c44c LP |
1482 | if (blacklist[i].index >= 8 * size || |
1483 | !uvc_test_bit(controls, blacklist[i].index)) | |
2bdd29cf LP |
1484 | continue; |
1485 | ||
d732c44c LP |
1486 | uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, " |
1487 | "removing it.\n", entity->id, blacklist[i].index); | |
2bdd29cf | 1488 | |
d732c44c | 1489 | uvc_clear_bit(controls, blacklist[i].index); |
2bdd29cf LP |
1490 | } |
1491 | } | |
1492 | ||
c0efd232 LP |
1493 | /* |
1494 | * Initialize device controls. | |
1495 | */ | |
1496 | int uvc_ctrl_init_device(struct uvc_device *dev) | |
1497 | { | |
1498 | struct uvc_control_info *info; | |
1499 | struct uvc_control *ctrl; | |
1500 | struct uvc_entity *entity; | |
1501 | unsigned int i; | |
1502 | ||
1503 | /* Walk the entities list and instantiate controls */ | |
1504 | list_for_each_entry(entity, &dev->entities, list) { | |
1505 | unsigned int bControlSize = 0, ncontrols = 0; | |
1506 | __u8 *bmControls = NULL; | |
1507 | ||
b482d923 | 1508 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
1509 | bmControls = entity->extension.bmControls; |
1510 | bControlSize = entity->extension.bControlSize; | |
b482d923 | 1511 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { |
c0efd232 LP |
1512 | bmControls = entity->processing.bmControls; |
1513 | bControlSize = entity->processing.bControlSize; | |
b482d923 | 1514 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { |
c0efd232 LP |
1515 | bmControls = entity->camera.bmControls; |
1516 | bControlSize = entity->camera.bControlSize; | |
1517 | } | |
1518 | ||
d732c44c | 1519 | uvc_ctrl_prune_entity(dev, entity); |
2bdd29cf | 1520 | |
c0efd232 LP |
1521 | for (i = 0; i < bControlSize; ++i) |
1522 | ncontrols += hweight8(bmControls[i]); | |
1523 | ||
1524 | if (ncontrols == 0) | |
1525 | continue; | |
1526 | ||
1527 | entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL); | |
1528 | if (entity->controls == NULL) | |
1529 | return -ENOMEM; | |
1530 | ||
1531 | entity->ncontrols = ncontrols; | |
1532 | ||
1533 | ctrl = entity->controls; | |
1534 | for (i = 0; i < bControlSize * 8; ++i) { | |
2bdd29cf | 1535 | if (uvc_test_bit(bmControls, i) == 0) |
c0efd232 LP |
1536 | continue; |
1537 | ||
1538 | ctrl->entity = entity; | |
1539 | ctrl->index = i; | |
1540 | ctrl++; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | /* Walk the controls info list and associate them with the device | |
1545 | * controls, then add the device to the global device list. This has | |
1546 | * to be done while holding the controls lock, to make sure | |
1547 | * uvc_ctrl_add_info() will not get called in-between. | |
1548 | */ | |
1549 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1550 | list_for_each_entry(info, &uvc_driver.controls, list) | |
1551 | uvc_ctrl_add_ctrl(dev, info); | |
1552 | ||
1553 | list_add_tail(&dev->list, &uvc_driver.devices); | |
1554 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | /* | |
1560 | * Cleanup device controls. | |
1561 | */ | |
1562 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) | |
1563 | { | |
1564 | struct uvc_entity *entity; | |
1565 | unsigned int i; | |
1566 | ||
1567 | /* Remove the device from the global devices list */ | |
1568 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1569 | if (dev->list.next != NULL) | |
1570 | list_del(&dev->list); | |
1571 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1572 | ||
1573 | list_for_each_entry(entity, &dev->entities, list) { | |
1574 | for (i = 0; i < entity->ncontrols; ++i) | |
1575 | kfree(entity->controls[i].data); | |
1576 | ||
1577 | kfree(entity->controls); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | void uvc_ctrl_init(void) | |
1582 | { | |
1583 | struct uvc_control_info *ctrl = uvc_ctrls; | |
1584 | struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls); | |
1585 | struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | |
1586 | struct uvc_control_mapping *mend = | |
1587 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | |
1588 | ||
1589 | for (; ctrl < cend; ++ctrl) | |
1590 | uvc_ctrl_add_info(ctrl); | |
1591 | ||
1592 | for (; mapping < mend; ++mapping) | |
1593 | uvc_ctrl_add_mapping(mapping); | |
1594 | } | |
f87086e3 | 1595 |