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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, | |
9c3b10b5 LP |
125 | .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
126 | | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, | |
c0efd232 LP |
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 | }, | |
e56be916 MR |
608 | { |
609 | .id = V4L2_CID_PAN_ABSOLUTE, | |
610 | .name = "Pan (Absolute)", | |
611 | .entity = UVC_GUID_UVC_CAMERA, | |
612 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
613 | .size = 32, | |
614 | .offset = 0, | |
615 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
616 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
617 | }, | |
618 | { | |
619 | .id = V4L2_CID_TILT_ABSOLUTE, | |
620 | .name = "Tilt (Absolute)", | |
621 | .entity = UVC_GUID_UVC_CAMERA, | |
622 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
623 | .size = 32, | |
624 | .offset = 32, | |
625 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
626 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
627 | }, | |
6df126f8 LP |
628 | { |
629 | .id = V4L2_CID_PRIVACY, | |
630 | .name = "Privacy", | |
631 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 632 | .selector = UVC_CT_PRIVACY_CONTROL, |
6df126f8 LP |
633 | .size = 1, |
634 | .offset = 0, | |
635 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
636 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
637 | }, | |
c0efd232 LP |
638 | }; |
639 | ||
640 | /* ------------------------------------------------------------------------ | |
641 | * Utility functions | |
642 | */ | |
643 | ||
644 | static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) | |
645 | { | |
b30ece53 | 646 | return ctrl->uvc_data + id * ctrl->info->size; |
c0efd232 LP |
647 | } |
648 | ||
2bdd29cf | 649 | static inline int uvc_test_bit(const __u8 *data, int bit) |
c0efd232 LP |
650 | { |
651 | return (data[bit >> 3] >> (bit & 7)) & 1; | |
652 | } | |
653 | ||
2bdd29cf LP |
654 | static inline void uvc_clear_bit(__u8 *data, int bit) |
655 | { | |
656 | data[bit >> 3] &= ~(1 << (bit & 7)); | |
657 | } | |
658 | ||
c0efd232 LP |
659 | /* Extract the bit string specified by mapping->offset and mapping->size |
660 | * from the little-endian data stored at 'data' and return the result as | |
661 | * a signed 32bit integer. Sign extension will be performed if the mapping | |
662 | * references a signed data type. | |
663 | */ | |
9768352a LP |
664 | static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping, |
665 | __u8 query, const __u8 *data) | |
c0efd232 LP |
666 | { |
667 | int bits = mapping->size; | |
668 | int offset = mapping->offset; | |
669 | __s32 value = 0; | |
670 | __u8 mask; | |
671 | ||
672 | data += offset / 8; | |
673 | offset &= 7; | |
674 | mask = ((1LL << bits) - 1) << offset; | |
675 | ||
676 | for (; bits > 0; data++) { | |
677 | __u8 byte = *data & mask; | |
678 | value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); | |
679 | bits -= 8 - (offset > 0 ? offset : 0); | |
680 | offset -= 8; | |
681 | mask = (1 << bits) - 1; | |
682 | } | |
683 | ||
2c2d264b | 684 | /* Sign-extend the value if needed. */ |
c0efd232 LP |
685 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
686 | value |= -(value & (1 << (mapping->size - 1))); | |
687 | ||
688 | return value; | |
689 | } | |
690 | ||
691 | /* Set the bit string specified by mapping->offset and mapping->size | |
692 | * in the little-endian data stored at 'data' to the value 'value'. | |
693 | */ | |
9768352a LP |
694 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, |
695 | __s32 value, __u8 *data) | |
c0efd232 LP |
696 | { |
697 | int bits = mapping->size; | |
698 | int offset = mapping->offset; | |
699 | __u8 mask; | |
700 | ||
3653639e HG |
701 | /* According to the v4l2 spec, writing any value to a button control |
702 | * should result in the action belonging to the button control being | |
703 | * triggered. UVC devices however want to see a 1 written -> override | |
704 | * value. | |
705 | */ | |
706 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) | |
707 | value = -1; | |
708 | ||
c0efd232 LP |
709 | data += offset / 8; |
710 | offset &= 7; | |
711 | ||
712 | for (; bits > 0; data++) { | |
713 | mask = ((1LL << bits) - 1) << offset; | |
714 | *data = (*data & ~mask) | ((value << offset) & mask); | |
715 | value >>= offset ? offset : 8; | |
716 | bits -= 8 - offset; | |
717 | offset = 0; | |
718 | } | |
719 | } | |
720 | ||
721 | /* ------------------------------------------------------------------------ | |
722 | * Terminal and unit management | |
723 | */ | |
724 | ||
725 | static const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; | |
726 | static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; | |
727 | static const __u8 uvc_media_transport_input_guid[16] = | |
728 | UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; | |
729 | ||
730 | static int uvc_entity_match_guid(struct uvc_entity *entity, __u8 guid[16]) | |
731 | { | |
732 | switch (UVC_ENTITY_TYPE(entity)) { | |
b482d923 | 733 | case UVC_ITT_CAMERA: |
c0efd232 LP |
734 | return memcmp(uvc_camera_guid, guid, 16) == 0; |
735 | ||
b482d923 | 736 | case UVC_ITT_MEDIA_TRANSPORT_INPUT: |
c0efd232 LP |
737 | return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
738 | ||
b482d923 | 739 | case UVC_VC_PROCESSING_UNIT: |
c0efd232 LP |
740 | return memcmp(uvc_processing_guid, guid, 16) == 0; |
741 | ||
b482d923 | 742 | case UVC_VC_EXTENSION_UNIT: |
c0efd232 LP |
743 | return memcmp(entity->extension.guidExtensionCode, |
744 | guid, 16) == 0; | |
745 | ||
746 | default: | |
747 | return 0; | |
748 | } | |
749 | } | |
750 | ||
751 | /* ------------------------------------------------------------------------ | |
752 | * UVC Controls | |
753 | */ | |
754 | ||
755 | static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, | |
756 | struct uvc_control_mapping **mapping, struct uvc_control **control, | |
757 | int next) | |
758 | { | |
759 | struct uvc_control *ctrl; | |
760 | struct uvc_control_mapping *map; | |
761 | unsigned int i; | |
762 | ||
763 | if (entity == NULL) | |
764 | return; | |
765 | ||
766 | for (i = 0; i < entity->ncontrols; ++i) { | |
767 | ctrl = &entity->controls[i]; | |
768 | if (ctrl->info == NULL) | |
769 | continue; | |
770 | ||
771 | list_for_each_entry(map, &ctrl->info->mappings, list) { | |
772 | if ((map->id == v4l2_id) && !next) { | |
773 | *control = ctrl; | |
774 | *mapping = map; | |
775 | return; | |
776 | } | |
777 | ||
778 | if ((*mapping == NULL || (*mapping)->id > map->id) && | |
779 | (map->id > v4l2_id) && next) { | |
780 | *control = ctrl; | |
781 | *mapping = map; | |
782 | } | |
783 | } | |
784 | } | |
785 | } | |
786 | ||
8e113595 | 787 | struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, |
c0efd232 LP |
788 | __u32 v4l2_id, struct uvc_control_mapping **mapping) |
789 | { | |
790 | struct uvc_control *ctrl = NULL; | |
791 | struct uvc_entity *entity; | |
792 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | |
793 | ||
794 | *mapping = NULL; | |
795 | ||
796 | /* Mask the query flags. */ | |
797 | v4l2_id &= V4L2_CTRL_ID_MASK; | |
798 | ||
799 | /* Find the control. */ | |
6241d8ca | 800 | list_for_each_entry(entity, &chain->entities, chain) { |
c0efd232 LP |
801 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
802 | if (ctrl && !next) | |
803 | return ctrl; | |
804 | } | |
805 | ||
806 | if (ctrl == NULL && !next) | |
807 | uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", | |
808 | v4l2_id); | |
809 | ||
810 | return ctrl; | |
811 | } | |
812 | ||
59529081 LP |
813 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, |
814 | struct uvc_control *ctrl) | |
815 | { | |
816 | int ret; | |
817 | ||
818 | if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { | |
819 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, | |
820 | chain->dev->intfnum, ctrl->info->selector, | |
821 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), | |
822 | ctrl->info->size); | |
823 | if (ret < 0) | |
824 | return ret; | |
825 | } | |
826 | ||
827 | if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { | |
828 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, | |
829 | chain->dev->intfnum, ctrl->info->selector, | |
830 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), | |
831 | ctrl->info->size); | |
832 | if (ret < 0) | |
833 | return ret; | |
834 | } | |
835 | if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { | |
836 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, | |
837 | chain->dev->intfnum, ctrl->info->selector, | |
838 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), | |
839 | ctrl->info->size); | |
840 | if (ret < 0) | |
841 | return ret; | |
842 | } | |
843 | if (ctrl->info->flags & UVC_CONTROL_GET_RES) { | |
844 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, | |
845 | chain->dev->intfnum, ctrl->info->selector, | |
846 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), | |
847 | ctrl->info->size); | |
848 | if (ret < 0) | |
849 | return ret; | |
850 | } | |
851 | ||
852 | ctrl->cached = 1; | |
853 | return 0; | |
854 | } | |
855 | ||
8e113595 | 856 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, |
c0efd232 LP |
857 | struct v4l2_queryctrl *v4l2_ctrl) |
858 | { | |
859 | struct uvc_control *ctrl; | |
860 | struct uvc_control_mapping *mapping; | |
861 | struct uvc_menu_info *menu; | |
862 | unsigned int i; | |
c0efd232 LP |
863 | int ret; |
864 | ||
8e113595 | 865 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); |
c0efd232 LP |
866 | if (ctrl == NULL) |
867 | return -EINVAL; | |
868 | ||
54812c77 | 869 | memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); |
c0efd232 LP |
870 | v4l2_ctrl->id = mapping->id; |
871 | v4l2_ctrl->type = mapping->v4l2_type; | |
d0ebf307 | 872 | strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); |
c0efd232 LP |
873 | v4l2_ctrl->flags = 0; |
874 | ||
a90ef69c LP |
875 | if (!(ctrl->info->flags & UVC_CONTROL_GET_CUR)) |
876 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
c0efd232 LP |
877 | if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR)) |
878 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
879 | ||
59529081 LP |
880 | if (!ctrl->cached) { |
881 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
b482d923 | 882 | if (ret < 0) |
59529081 LP |
883 | return ret; |
884 | } | |
885 | ||
886 | if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { | |
887 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, | |
888 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | |
c0efd232 LP |
889 | } |
890 | ||
54812c77 LP |
891 | switch (mapping->v4l2_type) { |
892 | case V4L2_CTRL_TYPE_MENU: | |
c0efd232 LP |
893 | v4l2_ctrl->minimum = 0; |
894 | v4l2_ctrl->maximum = mapping->menu_count - 1; | |
895 | v4l2_ctrl->step = 1; | |
896 | ||
897 | menu = mapping->menu_info; | |
898 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
899 | if (menu->value == v4l2_ctrl->default_value) { | |
900 | v4l2_ctrl->default_value = i; | |
901 | break; | |
902 | } | |
903 | } | |
904 | ||
59529081 | 905 | return 0; |
54812c77 LP |
906 | |
907 | case V4L2_CTRL_TYPE_BOOLEAN: | |
908 | v4l2_ctrl->minimum = 0; | |
909 | v4l2_ctrl->maximum = 1; | |
910 | v4l2_ctrl->step = 1; | |
59529081 | 911 | return 0; |
54812c77 | 912 | |
f4eabafe LP |
913 | case V4L2_CTRL_TYPE_BUTTON: |
914 | v4l2_ctrl->minimum = 0; | |
915 | v4l2_ctrl->maximum = 0; | |
916 | v4l2_ctrl->step = 0; | |
59529081 | 917 | return 0; |
f4eabafe | 918 | |
54812c77 LP |
919 | default: |
920 | break; | |
c0efd232 LP |
921 | } |
922 | ||
59529081 LP |
923 | if (ctrl->info->flags & UVC_CONTROL_GET_MIN) |
924 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, | |
925 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
c0efd232 | 926 | |
59529081 LP |
927 | if (ctrl->info->flags & UVC_CONTROL_GET_MAX) |
928 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, | |
929 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
930 | ||
931 | if (ctrl->info->flags & UVC_CONTROL_GET_RES) | |
932 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, | |
933 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
934 | ||
935 | return 0; | |
c0efd232 LP |
936 | } |
937 | ||
938 | ||
939 | /* -------------------------------------------------------------------------- | |
940 | * Control transactions | |
941 | * | |
942 | * To make extended set operations as atomic as the hardware allows, controls | |
943 | * are handled using begin/commit/rollback operations. | |
944 | * | |
945 | * At the beginning of a set request, uvc_ctrl_begin should be called to | |
946 | * initialize the request. This function acquires the control lock. | |
947 | * | |
948 | * When setting a control, the new value is stored in the control data field | |
949 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | |
950 | * later processing. If the UVC and V4L2 control sizes differ, the current | |
951 | * value is loaded from the hardware before storing the new value in the data | |
952 | * field. | |
953 | * | |
954 | * After processing all controls in the transaction, uvc_ctrl_commit or | |
955 | * uvc_ctrl_rollback must be called to apply the pending changes to the | |
956 | * hardware or revert them. When applying changes, all controls marked as | |
957 | * dirty will be modified in the UVC device, and the dirty flag will be | |
958 | * cleared. When reverting controls, the control data field | |
959 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | |
960 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | |
961 | * control lock. | |
962 | */ | |
8e113595 | 963 | int uvc_ctrl_begin(struct uvc_video_chain *chain) |
c0efd232 | 964 | { |
8e113595 | 965 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; |
c0efd232 LP |
966 | } |
967 | ||
968 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | |
969 | struct uvc_entity *entity, int rollback) | |
970 | { | |
971 | struct uvc_control *ctrl; | |
972 | unsigned int i; | |
973 | int ret; | |
974 | ||
975 | if (entity == NULL) | |
976 | return 0; | |
977 | ||
978 | for (i = 0; i < entity->ncontrols; ++i) { | |
979 | ctrl = &entity->controls[i]; | |
b1accfa1 LP |
980 | if (ctrl->info == NULL) |
981 | continue; | |
982 | ||
983 | /* Reset the loaded flag for auto-update controls that were | |
984 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | |
985 | * uvc_ctrl_get from using the cached value. | |
986 | */ | |
987 | if (ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) | |
988 | ctrl->loaded = 0; | |
989 | ||
990 | if (!ctrl->dirty) | |
c0efd232 LP |
991 | continue; |
992 | ||
993 | if (!rollback) | |
b482d923 | 994 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, |
c0efd232 LP |
995 | dev->intfnum, ctrl->info->selector, |
996 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
997 | ctrl->info->size); | |
998 | else | |
999 | ret = 0; | |
1000 | ||
1001 | if (rollback || ret < 0) | |
1002 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1003 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1004 | ctrl->info->size); | |
1005 | ||
c0efd232 LP |
1006 | ctrl->dirty = 0; |
1007 | ||
1008 | if (ret < 0) | |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | return 0; | |
1013 | } | |
1014 | ||
8e113595 | 1015 | int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) |
c0efd232 LP |
1016 | { |
1017 | struct uvc_entity *entity; | |
1018 | int ret = 0; | |
1019 | ||
1020 | /* Find the control. */ | |
6241d8ca | 1021 | list_for_each_entry(entity, &chain->entities, chain) { |
8e113595 | 1022 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); |
c0efd232 LP |
1023 | if (ret < 0) |
1024 | goto done; | |
1025 | } | |
1026 | ||
1027 | done: | |
8e113595 | 1028 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1029 | return ret; |
1030 | } | |
1031 | ||
8e113595 | 1032 | int uvc_ctrl_get(struct uvc_video_chain *chain, |
c0efd232 LP |
1033 | struct v4l2_ext_control *xctrl) |
1034 | { | |
1035 | struct uvc_control *ctrl; | |
1036 | struct uvc_control_mapping *mapping; | |
1037 | struct uvc_menu_info *menu; | |
1038 | unsigned int i; | |
1039 | int ret; | |
1040 | ||
8e113595 | 1041 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
c0efd232 LP |
1042 | if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) |
1043 | return -EINVAL; | |
1044 | ||
1045 | if (!ctrl->loaded) { | |
8e113595 LP |
1046 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, |
1047 | chain->dev->intfnum, ctrl->info->selector, | |
c0efd232 LP |
1048 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
1049 | ctrl->info->size); | |
1050 | if (ret < 0) | |
1051 | return ret; | |
1052 | ||
b1accfa1 | 1053 | ctrl->loaded = 1; |
c0efd232 LP |
1054 | } |
1055 | ||
b482d923 | 1056 | xctrl->value = mapping->get(mapping, UVC_GET_CUR, |
9768352a | 1057 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); |
c0efd232 LP |
1058 | |
1059 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { | |
1060 | menu = mapping->menu_info; | |
1061 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
1062 | if (menu->value == xctrl->value) { | |
1063 | xctrl->value = i; | |
1064 | break; | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
8e113595 | 1072 | int uvc_ctrl_set(struct uvc_video_chain *chain, |
c0efd232 LP |
1073 | struct v4l2_ext_control *xctrl) |
1074 | { | |
1075 | struct uvc_control *ctrl; | |
1076 | struct uvc_control_mapping *mapping; | |
e54532e5 LP |
1077 | s32 value; |
1078 | u32 step; | |
1079 | s32 min; | |
1080 | s32 max; | |
c0efd232 LP |
1081 | int ret; |
1082 | ||
8e113595 | 1083 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
c0efd232 LP |
1084 | if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0) |
1085 | return -EINVAL; | |
1086 | ||
e54532e5 LP |
1087 | /* Clamp out of range values. */ |
1088 | switch (mapping->v4l2_type) { | |
1089 | case V4L2_CTRL_TYPE_INTEGER: | |
1090 | if (!ctrl->cached) { | |
1091 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1092 | if (ret < 0) | |
1093 | return ret; | |
1094 | } | |
1095 | ||
1096 | min = mapping->get(mapping, UVC_GET_MIN, | |
1097 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
1098 | max = mapping->get(mapping, UVC_GET_MAX, | |
1099 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1100 | step = mapping->get(mapping, UVC_GET_RES, | |
1101 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
cf7a50ee LP |
1102 | if (step == 0) |
1103 | step = 1; | |
e54532e5 LP |
1104 | |
1105 | xctrl->value = min + (xctrl->value - min + step/2) / step * step; | |
1106 | xctrl->value = clamp(xctrl->value, min, max); | |
1107 | value = xctrl->value; | |
1108 | break; | |
1109 | ||
1110 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1111 | xctrl->value = clamp(xctrl->value, 0, 1); | |
1112 | value = xctrl->value; | |
1113 | break; | |
1114 | ||
1115 | case V4L2_CTRL_TYPE_MENU: | |
1116 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | |
8a4e76c1 | 1117 | return -ERANGE; |
e54532e5 LP |
1118 | value = mapping->menu_info[xctrl->value].value; |
1119 | break; | |
1120 | ||
1121 | default: | |
1122 | value = xctrl->value; | |
1123 | break; | |
c0efd232 LP |
1124 | } |
1125 | ||
e54532e5 LP |
1126 | /* If the mapping doesn't span the whole UVC control, the current value |
1127 | * needs to be loaded from the device to perform the read-modify-write | |
1128 | * operation. | |
1129 | */ | |
c0efd232 LP |
1130 | if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) { |
1131 | if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) { | |
1132 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1133 | 0, ctrl->info->size); | |
1134 | } else { | |
8e113595 LP |
1135 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
1136 | ctrl->entity->id, chain->dev->intfnum, | |
c0efd232 LP |
1137 | ctrl->info->selector, |
1138 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1139 | ctrl->info->size); | |
1140 | if (ret < 0) | |
1141 | return ret; | |
1142 | } | |
1143 | ||
b1accfa1 | 1144 | ctrl->loaded = 1; |
c0efd232 LP |
1145 | } |
1146 | ||
e54532e5 | 1147 | /* Backup the current value in case we need to rollback later. */ |
c0efd232 LP |
1148 | if (!ctrl->dirty) { |
1149 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1150 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1151 | ctrl->info->size); | |
1152 | } | |
1153 | ||
9768352a LP |
1154 | mapping->set(mapping, value, |
1155 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
c0efd232 LP |
1156 | |
1157 | ctrl->dirty = 1; | |
1158 | ctrl->modified = 1; | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | /* -------------------------------------------------------------------------- | |
1163 | * Dynamic controls | |
1164 | */ | |
1165 | ||
8e113595 | 1166 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, |
c0efd232 LP |
1167 | struct uvc_xu_control *xctrl, int set) |
1168 | { | |
1169 | struct uvc_entity *entity; | |
1170 | struct uvc_control *ctrl = NULL; | |
1171 | unsigned int i, found = 0; | |
1172 | __u8 *data; | |
1173 | int ret; | |
1174 | ||
1175 | /* Find the extension unit. */ | |
6241d8ca LP |
1176 | list_for_each_entry(entity, &chain->entities, chain) { |
1177 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | |
1178 | entity->id == xctrl->unit) | |
c0efd232 LP |
1179 | break; |
1180 | } | |
1181 | ||
1182 | if (entity->id != xctrl->unit) { | |
1183 | uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", | |
1184 | xctrl->unit); | |
1185 | return -EINVAL; | |
1186 | } | |
1187 | ||
1188 | /* Find the control. */ | |
1189 | for (i = 0; i < entity->ncontrols; ++i) { | |
1190 | ctrl = &entity->controls[i]; | |
1191 | if (ctrl->info == NULL) | |
1192 | continue; | |
1193 | ||
1194 | if (ctrl->info->selector == xctrl->selector) { | |
1195 | found = 1; | |
1196 | break; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | if (!found) { | |
36bd883e LP |
1201 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", |
1202 | entity->extension.guidExtensionCode, xctrl->selector); | |
c0efd232 LP |
1203 | return -EINVAL; |
1204 | } | |
1205 | ||
1206 | /* Validate control data size. */ | |
1207 | if (ctrl->info->size != xctrl->size) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) || | |
1211 | (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR))) | |
1212 | return -EINVAL; | |
1213 | ||
8e113595 | 1214 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
c0efd232 LP |
1215 | return -ERESTARTSYS; |
1216 | ||
1217 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1218 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1219 | xctrl->size); | |
1220 | data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); | |
1221 | ||
1222 | if (set && copy_from_user(data, xctrl->data, xctrl->size)) { | |
1223 | ret = -EFAULT; | |
1224 | goto out; | |
1225 | } | |
1226 | ||
8e113595 LP |
1227 | ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR, |
1228 | xctrl->unit, chain->dev->intfnum, xctrl->selector, | |
b482d923 | 1229 | data, xctrl->size); |
c0efd232 LP |
1230 | if (ret < 0) |
1231 | goto out; | |
1232 | ||
1233 | if (!set && copy_to_user(xctrl->data, data, xctrl->size)) { | |
1234 | ret = -EFAULT; | |
1235 | goto out; | |
1236 | } | |
1237 | ||
1238 | out: | |
1239 | if (ret) | |
1240 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1241 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1242 | xctrl->size); | |
1243 | ||
8e113595 | 1244 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1245 | return ret; |
1246 | } | |
1247 | ||
1248 | /* -------------------------------------------------------------------------- | |
1249 | * Suspend/resume | |
1250 | */ | |
1251 | ||
1252 | /* | |
1253 | * Restore control values after resume, skipping controls that haven't been | |
1254 | * changed. | |
1255 | * | |
1256 | * TODO | |
1257 | * - Don't restore modified controls that are back to their default value. | |
1258 | * - Handle restore order (Auto-Exposure Mode should be restored before | |
1259 | * Exposure Time). | |
1260 | */ | |
1261 | int uvc_ctrl_resume_device(struct uvc_device *dev) | |
1262 | { | |
1263 | struct uvc_control *ctrl; | |
1264 | struct uvc_entity *entity; | |
1265 | unsigned int i; | |
1266 | int ret; | |
1267 | ||
1268 | /* Walk the entities list and restore controls when possible. */ | |
1269 | list_for_each_entry(entity, &dev->entities, list) { | |
1270 | ||
1271 | for (i = 0; i < entity->ncontrols; ++i) { | |
1272 | ctrl = &entity->controls[i]; | |
1273 | ||
1274 | if (ctrl->info == NULL || !ctrl->modified || | |
1275 | (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0) | |
1276 | continue; | |
1277 | ||
36bd883e LP |
1278 | printk(KERN_INFO "restoring control %pUl/%u/%u\n", |
1279 | ctrl->info->entity, ctrl->info->index, | |
1280 | ctrl->info->selector); | |
c0efd232 LP |
1281 | ctrl->dirty = 1; |
1282 | } | |
1283 | ||
1284 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | |
1285 | if (ret < 0) | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | /* -------------------------------------------------------------------------- | |
1293 | * Control and mapping handling | |
1294 | */ | |
1295 | ||
b30ece53 | 1296 | static int uvc_ctrl_add_ctrl(struct uvc_device *dev, |
c0efd232 LP |
1297 | struct uvc_control_info *info) |
1298 | { | |
1299 | struct uvc_entity *entity; | |
1300 | struct uvc_control *ctrl = NULL; | |
b30ece53 | 1301 | int ret = 0, found = 0; |
c0efd232 | 1302 | unsigned int i; |
b30ece53 LP |
1303 | u8 *uvc_info; |
1304 | u8 *uvc_data; | |
c0efd232 LP |
1305 | |
1306 | list_for_each_entry(entity, &dev->entities, list) { | |
1307 | if (!uvc_entity_match_guid(entity, info->entity)) | |
1308 | continue; | |
1309 | ||
1310 | for (i = 0; i < entity->ncontrols; ++i) { | |
1311 | ctrl = &entity->controls[i]; | |
1312 | if (ctrl->index == info->index) { | |
1313 | found = 1; | |
1314 | break; | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | if (found) | |
1319 | break; | |
1320 | } | |
1321 | ||
1322 | if (!found) | |
b30ece53 LP |
1323 | return 0; |
1324 | ||
1325 | uvc_data = kmalloc(info->size * UVC_CTRL_DATA_LAST + 1, GFP_KERNEL); | |
1326 | if (uvc_data == NULL) | |
1327 | return -ENOMEM; | |
1328 | ||
1329 | uvc_info = uvc_data + info->size * UVC_CTRL_DATA_LAST; | |
c0efd232 | 1330 | |
b482d923 | 1331 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
1332 | /* Check if the device control information and length match |
1333 | * the user supplied information. | |
1334 | */ | |
b482d923 | 1335 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, |
b30ece53 | 1336 | dev->intfnum, info->selector, uvc_data, 2); |
b482d923 | 1337 | if (ret < 0) { |
36bd883e LP |
1338 | uvc_trace(UVC_TRACE_CONTROL, |
1339 | "GET_LEN failed on control %pUl/%u (%d).\n", | |
1340 | info->entity, info->selector, ret); | |
b30ece53 | 1341 | goto done; |
c0efd232 LP |
1342 | } |
1343 | ||
b30ece53 | 1344 | if (info->size != le16_to_cpu(*(__le16 *)uvc_data)) { |
36bd883e LP |
1345 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u size " |
1346 | "doesn't match user supplied value.\n", | |
1347 | info->entity, info->selector); | |
b30ece53 LP |
1348 | ret = -EINVAL; |
1349 | goto done; | |
c0efd232 LP |
1350 | } |
1351 | ||
b482d923 | 1352 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, |
b30ece53 | 1353 | dev->intfnum, info->selector, uvc_info, 1); |
b482d923 | 1354 | if (ret < 0) { |
36bd883e LP |
1355 | uvc_trace(UVC_TRACE_CONTROL, |
1356 | "GET_INFO failed on control %pUl/%u (%d).\n", | |
1357 | info->entity, info->selector, ret); | |
b30ece53 | 1358 | goto done; |
c0efd232 LP |
1359 | } |
1360 | ||
1b4e21c4 | 1361 | if (((info->flags & UVC_CONTROL_GET_CUR) && |
b30ece53 | 1362 | !(*uvc_info & UVC_CONTROL_CAP_GET)) || |
1b4e21c4 | 1363 | ((info->flags & UVC_CONTROL_SET_CUR) && |
b30ece53 | 1364 | !(*uvc_info & UVC_CONTROL_CAP_SET))) { |
36bd883e LP |
1365 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u flags " |
1366 | "don't match supported operations.\n", | |
1367 | info->entity, info->selector); | |
b30ece53 LP |
1368 | ret = -EINVAL; |
1369 | goto done; | |
c0efd232 LP |
1370 | } |
1371 | } | |
1372 | ||
1373 | ctrl->info = info; | |
b30ece53 LP |
1374 | ctrl->uvc_data = uvc_data; |
1375 | ctrl->uvc_info = uvc_info; | |
1376 | ||
36bd883e LP |
1377 | uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " |
1378 | "entity %u\n", ctrl->info->entity, ctrl->info->selector, | |
1379 | dev->udev->devpath, entity->id); | |
b30ece53 LP |
1380 | |
1381 | done: | |
1382 | if (ret < 0) | |
1383 | kfree(uvc_data); | |
1384 | ||
1385 | return ret; | |
c0efd232 LP |
1386 | } |
1387 | ||
1388 | /* | |
1389 | * Add an item to the UVC control information list, and instantiate a control | |
1390 | * structure for each device that supports the control. | |
1391 | */ | |
1392 | int uvc_ctrl_add_info(struct uvc_control_info *info) | |
1393 | { | |
1394 | struct uvc_control_info *ctrl; | |
1395 | struct uvc_device *dev; | |
1396 | int ret = 0; | |
1397 | ||
1398 | /* Find matching controls by walking the devices, entities and | |
1399 | * controls list. | |
1400 | */ | |
1401 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1402 | ||
1403 | /* First check if the list contains a control matching the new one. | |
1404 | * Bail out if it does. | |
1405 | */ | |
1406 | list_for_each_entry(ctrl, &uvc_driver.controls, list) { | |
1407 | if (memcmp(ctrl->entity, info->entity, 16)) | |
1408 | continue; | |
1409 | ||
1410 | if (ctrl->selector == info->selector) { | |
36bd883e LP |
1411 | uvc_trace(UVC_TRACE_CONTROL, |
1412 | "Control %pUl/%u is already defined.\n", | |
1413 | info->entity, info->selector); | |
c0efd232 LP |
1414 | ret = -EEXIST; |
1415 | goto end; | |
1416 | } | |
1417 | if (ctrl->index == info->index) { | |
36bd883e LP |
1418 | uvc_trace(UVC_TRACE_CONTROL, |
1419 | "Control %pUl/%u would overwrite index %d.\n", | |
1420 | info->entity, info->selector, info->index); | |
c0efd232 LP |
1421 | ret = -EEXIST; |
1422 | goto end; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | list_for_each_entry(dev, &uvc_driver.devices, list) | |
1427 | uvc_ctrl_add_ctrl(dev, info); | |
1428 | ||
1429 | INIT_LIST_HEAD(&info->mappings); | |
1430 | list_add_tail(&info->list, &uvc_driver.controls); | |
1431 | end: | |
1432 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1433 | return ret; | |
1434 | } | |
1435 | ||
1436 | int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping) | |
1437 | { | |
1438 | struct uvc_control_info *info; | |
1439 | struct uvc_control_mapping *map; | |
1440 | int ret = -EINVAL; | |
1441 | ||
9768352a LP |
1442 | if (mapping->get == NULL) |
1443 | mapping->get = uvc_get_le_value; | |
1444 | if (mapping->set == NULL) | |
1445 | mapping->set = uvc_set_le_value; | |
1446 | ||
c0efd232 LP |
1447 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
1448 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with " | |
1449 | "invalid control id 0x%08x\n", mapping->name, | |
1450 | mapping->id); | |
1451 | return -EINVAL; | |
1452 | } | |
1453 | ||
1454 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1455 | list_for_each_entry(info, &uvc_driver.controls, list) { | |
1456 | if (memcmp(info->entity, mapping->entity, 16) || | |
1457 | info->selector != mapping->selector) | |
1458 | continue; | |
1459 | ||
1460 | if (info->size * 8 < mapping->size + mapping->offset) { | |
36bd883e LP |
1461 | uvc_trace(UVC_TRACE_CONTROL, |
1462 | "Mapping '%s' would overflow control %pUl/%u\n", | |
1463 | mapping->name, info->entity, info->selector); | |
c0efd232 LP |
1464 | ret = -EOVERFLOW; |
1465 | goto end; | |
1466 | } | |
1467 | ||
1468 | /* Check if the list contains a mapping matching the new one. | |
1469 | * Bail out if it does. | |
1470 | */ | |
1471 | list_for_each_entry(map, &info->mappings, list) { | |
1472 | if (map->id == mapping->id) { | |
1473 | uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is " | |
1474 | "already defined.\n", mapping->name); | |
1475 | ret = -EEXIST; | |
1476 | goto end; | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | mapping->ctrl = info; | |
1481 | list_add_tail(&mapping->list, &info->mappings); | |
36bd883e LP |
1482 | uvc_trace(UVC_TRACE_CONTROL, |
1483 | "Adding mapping %s to control %pUl/%u.\n", | |
1484 | mapping->name, info->entity, info->selector); | |
c0efd232 LP |
1485 | |
1486 | ret = 0; | |
1487 | break; | |
1488 | } | |
1489 | end: | |
1490 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1491 | return ret; | |
1492 | } | |
1493 | ||
2bdd29cf | 1494 | /* |
d732c44c LP |
1495 | * Prune an entity of its bogus controls using a blacklist. Bogus controls |
1496 | * are currently the ones that crash the camera or unconditionally return an | |
1497 | * error when queried. | |
2bdd29cf LP |
1498 | */ |
1499 | static void | |
d732c44c | 1500 | uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity) |
2bdd29cf LP |
1501 | { |
1502 | static const struct { | |
d732c44c LP |
1503 | struct usb_device_id id; |
1504 | u8 index; | |
2bdd29cf | 1505 | } blacklist[] = { |
9405e3cb | 1506 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ |
d732c44c LP |
1507 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ |
1508 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | |
2bdd29cf LP |
1509 | }; |
1510 | ||
1511 | u8 *controls; | |
1512 | unsigned int size; | |
1513 | unsigned int i; | |
1514 | ||
b482d923 | 1515 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_PROCESSING_UNIT) |
2bdd29cf LP |
1516 | return; |
1517 | ||
1518 | controls = entity->processing.bmControls; | |
1519 | size = entity->processing.bControlSize; | |
1520 | ||
1521 | for (i = 0; i < ARRAY_SIZE(blacklist); ++i) { | |
385097e0 | 1522 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) |
2bdd29cf LP |
1523 | continue; |
1524 | ||
d732c44c LP |
1525 | if (blacklist[i].index >= 8 * size || |
1526 | !uvc_test_bit(controls, blacklist[i].index)) | |
2bdd29cf LP |
1527 | continue; |
1528 | ||
d732c44c LP |
1529 | uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, " |
1530 | "removing it.\n", entity->id, blacklist[i].index); | |
2bdd29cf | 1531 | |
d732c44c | 1532 | uvc_clear_bit(controls, blacklist[i].index); |
2bdd29cf LP |
1533 | } |
1534 | } | |
1535 | ||
c0efd232 LP |
1536 | /* |
1537 | * Initialize device controls. | |
1538 | */ | |
1539 | int uvc_ctrl_init_device(struct uvc_device *dev) | |
1540 | { | |
1541 | struct uvc_control_info *info; | |
1542 | struct uvc_control *ctrl; | |
1543 | struct uvc_entity *entity; | |
1544 | unsigned int i; | |
1545 | ||
1546 | /* Walk the entities list and instantiate controls */ | |
1547 | list_for_each_entry(entity, &dev->entities, list) { | |
1548 | unsigned int bControlSize = 0, ncontrols = 0; | |
1549 | __u8 *bmControls = NULL; | |
1550 | ||
b482d923 | 1551 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
1552 | bmControls = entity->extension.bmControls; |
1553 | bControlSize = entity->extension.bControlSize; | |
b482d923 | 1554 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { |
c0efd232 LP |
1555 | bmControls = entity->processing.bmControls; |
1556 | bControlSize = entity->processing.bControlSize; | |
b482d923 | 1557 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { |
c0efd232 LP |
1558 | bmControls = entity->camera.bmControls; |
1559 | bControlSize = entity->camera.bControlSize; | |
1560 | } | |
1561 | ||
d732c44c | 1562 | uvc_ctrl_prune_entity(dev, entity); |
2bdd29cf | 1563 | |
c0efd232 LP |
1564 | for (i = 0; i < bControlSize; ++i) |
1565 | ncontrols += hweight8(bmControls[i]); | |
1566 | ||
1567 | if (ncontrols == 0) | |
1568 | continue; | |
1569 | ||
1570 | entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL); | |
1571 | if (entity->controls == NULL) | |
1572 | return -ENOMEM; | |
1573 | ||
1574 | entity->ncontrols = ncontrols; | |
1575 | ||
1576 | ctrl = entity->controls; | |
1577 | for (i = 0; i < bControlSize * 8; ++i) { | |
2bdd29cf | 1578 | if (uvc_test_bit(bmControls, i) == 0) |
c0efd232 LP |
1579 | continue; |
1580 | ||
1581 | ctrl->entity = entity; | |
1582 | ctrl->index = i; | |
1583 | ctrl++; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | /* Walk the controls info list and associate them with the device | |
1588 | * controls, then add the device to the global device list. This has | |
1589 | * to be done while holding the controls lock, to make sure | |
1590 | * uvc_ctrl_add_info() will not get called in-between. | |
1591 | */ | |
1592 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1593 | list_for_each_entry(info, &uvc_driver.controls, list) | |
1594 | uvc_ctrl_add_ctrl(dev, info); | |
1595 | ||
1596 | list_add_tail(&dev->list, &uvc_driver.devices); | |
1597 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Cleanup device controls. | |
1604 | */ | |
1605 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) | |
1606 | { | |
1607 | struct uvc_entity *entity; | |
1608 | unsigned int i; | |
1609 | ||
1610 | /* Remove the device from the global devices list */ | |
1611 | mutex_lock(&uvc_driver.ctrl_mutex); | |
1612 | if (dev->list.next != NULL) | |
1613 | list_del(&dev->list); | |
1614 | mutex_unlock(&uvc_driver.ctrl_mutex); | |
1615 | ||
1616 | list_for_each_entry(entity, &dev->entities, list) { | |
1617 | for (i = 0; i < entity->ncontrols; ++i) | |
b30ece53 | 1618 | kfree(entity->controls[i].uvc_data); |
c0efd232 LP |
1619 | |
1620 | kfree(entity->controls); | |
1621 | } | |
1622 | } | |
1623 | ||
561474c2 LP |
1624 | void uvc_ctrl_cleanup(void) |
1625 | { | |
1626 | struct uvc_control_info *info; | |
1627 | struct uvc_control_info *ni; | |
1628 | struct uvc_control_mapping *mapping; | |
1629 | struct uvc_control_mapping *nm; | |
1630 | ||
1631 | list_for_each_entry_safe(info, ni, &uvc_driver.controls, list) { | |
1632 | if (!(info->flags & UVC_CONTROL_EXTENSION)) | |
1633 | continue; | |
1634 | ||
1635 | list_for_each_entry_safe(mapping, nm, &info->mappings, list) { | |
1636 | list_del(&mapping->list); | |
1637 | kfree(mapping->menu_info); | |
1638 | kfree(mapping); | |
1639 | } | |
1640 | ||
1641 | list_del(&info->list); | |
1642 | kfree(info); | |
1643 | } | |
1644 | } | |
1645 | ||
c0efd232 LP |
1646 | void uvc_ctrl_init(void) |
1647 | { | |
1648 | struct uvc_control_info *ctrl = uvc_ctrls; | |
1649 | struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls); | |
1650 | struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | |
1651 | struct uvc_control_mapping *mend = | |
1652 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | |
1653 | ||
1654 | for (; ctrl < cend; ++ctrl) | |
1655 | uvc_ctrl_add_info(ctrl); | |
1656 | ||
1657 | for (; mapping < mend; ++mapping) | |
1658 | uvc_ctrl_add_mapping(mapping); | |
1659 | } | |
f87086e3 | 1660 |