]>
Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c0efd232 LP |
2 | /* |
3 | * uvc_ctrl.c -- USB Video Class driver - Controls | |
4 | * | |
11fc5baf LP |
5 | * Copyright (C) 2005-2010 |
6 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
c0efd232 LP |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
c0efd232 LP |
10 | #include <linux/list.h> |
11 | #include <linux/module.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
c0efd232 LP |
13 | #include <linux/uaccess.h> |
14 | #include <linux/usb.h> | |
15 | #include <linux/videodev2.h> | |
16 | #include <linux/vmalloc.h> | |
17 | #include <linux/wait.h> | |
e5225c82 | 18 | #include <linux/workqueue.h> |
60063497 | 19 | #include <linux/atomic.h> |
b4012002 | 20 | #include <media/v4l2-ctrls.h> |
c0efd232 LP |
21 | |
22 | #include "uvcvideo.h" | |
23 | ||
c0efd232 LP |
24 | #define UVC_CTRL_DATA_CURRENT 0 |
25 | #define UVC_CTRL_DATA_BACKUP 1 | |
59529081 LP |
26 | #define UVC_CTRL_DATA_MIN 2 |
27 | #define UVC_CTRL_DATA_MAX 3 | |
28 | #define UVC_CTRL_DATA_RES 4 | |
29 | #define UVC_CTRL_DATA_DEF 5 | |
30 | #define UVC_CTRL_DATA_LAST 6 | |
c0efd232 LP |
31 | |
32 | /* ------------------------------------------------------------------------ | |
2c2d264b | 33 | * Controls |
c0efd232 LP |
34 | */ |
35 | ||
8643d237 | 36 | static const struct uvc_control_info uvc_ctrls[] = { |
c0efd232 LP |
37 | { |
38 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 39 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
40 | .index = 0, |
41 | .size = 2, | |
9eb30d2f LP |
42 | .flags = UVC_CTRL_FLAG_SET_CUR |
43 | | UVC_CTRL_FLAG_GET_RANGE | |
44 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
45 | }, |
46 | { | |
47 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 48 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
49 | .index = 1, |
50 | .size = 2, | |
9eb30d2f LP |
51 | .flags = UVC_CTRL_FLAG_SET_CUR |
52 | | UVC_CTRL_FLAG_GET_RANGE | |
53 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
54 | }, |
55 | { | |
56 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 57 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
58 | .index = 2, |
59 | .size = 2, | |
9eb30d2f LP |
60 | .flags = UVC_CTRL_FLAG_SET_CUR |
61 | | UVC_CTRL_FLAG_GET_RANGE | |
62 | | UVC_CTRL_FLAG_RESTORE | |
63 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
64 | }, |
65 | { | |
66 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 67 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
68 | .index = 3, |
69 | .size = 2, | |
9eb30d2f LP |
70 | .flags = UVC_CTRL_FLAG_SET_CUR |
71 | | UVC_CTRL_FLAG_GET_RANGE | |
72 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
73 | }, |
74 | { | |
75 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 76 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
77 | .index = 4, |
78 | .size = 2, | |
9eb30d2f LP |
79 | .flags = UVC_CTRL_FLAG_SET_CUR |
80 | | UVC_CTRL_FLAG_GET_RANGE | |
81 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
82 | }, |
83 | { | |
84 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 85 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
86 | .index = 5, |
87 | .size = 2, | |
9eb30d2f LP |
88 | .flags = UVC_CTRL_FLAG_SET_CUR |
89 | | UVC_CTRL_FLAG_GET_RANGE | |
90 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 | 91 | }, |
5e26d50f LP |
92 | { |
93 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 94 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
5e26d50f LP |
95 | .index = 6, |
96 | .size = 2, | |
9eb30d2f LP |
97 | .flags = UVC_CTRL_FLAG_SET_CUR |
98 | | UVC_CTRL_FLAG_GET_RANGE | |
99 | | UVC_CTRL_FLAG_RESTORE | |
100 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
101 | }, |
102 | { | |
103 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 104 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
5e26d50f LP |
105 | .index = 7, |
106 | .size = 4, | |
9eb30d2f LP |
107 | .flags = UVC_CTRL_FLAG_SET_CUR |
108 | | UVC_CTRL_FLAG_GET_RANGE | |
109 | | UVC_CTRL_FLAG_RESTORE | |
110 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f | 111 | }, |
c0efd232 LP |
112 | { |
113 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 114 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
115 | .index = 8, |
116 | .size = 2, | |
9eb30d2f LP |
117 | .flags = UVC_CTRL_FLAG_SET_CUR |
118 | | UVC_CTRL_FLAG_GET_RANGE | |
119 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
120 | }, |
121 | { | |
122 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 123 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
124 | .index = 9, |
125 | .size = 2, | |
9eb30d2f LP |
126 | .flags = UVC_CTRL_FLAG_SET_CUR |
127 | | UVC_CTRL_FLAG_GET_RANGE | |
128 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
129 | }, |
130 | { | |
131 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 132 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
133 | .index = 10, |
134 | .size = 1, | |
9eb30d2f LP |
135 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
136 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
137 | }, |
138 | { | |
139 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 140 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
141 | .index = 11, |
142 | .size = 1, | |
9eb30d2f LP |
143 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
144 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 | 145 | }, |
5e26d50f LP |
146 | { |
147 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 148 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
5e26d50f LP |
149 | .index = 12, |
150 | .size = 1, | |
9eb30d2f LP |
151 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
152 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
153 | }, |
154 | { | |
155 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 156 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
5e26d50f LP |
157 | .index = 13, |
158 | .size = 1, | |
9eb30d2f LP |
159 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
160 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
161 | }, |
162 | { | |
163 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 164 | .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL, |
5e26d50f LP |
165 | .index = 14, |
166 | .size = 2, | |
9eb30d2f LP |
167 | .flags = UVC_CTRL_FLAG_SET_CUR |
168 | | UVC_CTRL_FLAG_GET_RANGE | |
169 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
170 | }, |
171 | { | |
172 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 173 | .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL, |
5e26d50f LP |
174 | .index = 15, |
175 | .size = 2, | |
9eb30d2f LP |
176 | .flags = UVC_CTRL_FLAG_SET_CUR |
177 | | UVC_CTRL_FLAG_GET_RANGE | |
178 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f LP |
179 | }, |
180 | { | |
181 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 182 | .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL, |
5e26d50f LP |
183 | .index = 16, |
184 | .size = 1, | |
9eb30d2f | 185 | .flags = UVC_CTRL_FLAG_GET_CUR, |
5e26d50f LP |
186 | }, |
187 | { | |
188 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 189 | .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL, |
5e26d50f LP |
190 | .index = 17, |
191 | .size = 1, | |
9eb30d2f | 192 | .flags = UVC_CTRL_FLAG_GET_CUR, |
5e26d50f LP |
193 | }, |
194 | { | |
195 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 196 | .selector = UVC_CT_SCANNING_MODE_CONTROL, |
5e26d50f LP |
197 | .index = 0, |
198 | .size = 1, | |
9eb30d2f LP |
199 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
200 | | UVC_CTRL_FLAG_RESTORE, | |
5e26d50f | 201 | }, |
c0efd232 LP |
202 | { |
203 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 204 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
205 | .index = 1, |
206 | .size = 1, | |
9eb30d2f LP |
207 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
208 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_GET_RES | |
209 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
210 | }, |
211 | { | |
212 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 213 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
214 | .index = 2, |
215 | .size = 1, | |
9eb30d2f LP |
216 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
217 | | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
218 | }, |
219 | { | |
220 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 221 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
222 | .index = 3, |
223 | .size = 4, | |
9eb30d2f LP |
224 | .flags = UVC_CTRL_FLAG_SET_CUR |
225 | | UVC_CTRL_FLAG_GET_RANGE | |
1ab8c3fc AS |
226 | | UVC_CTRL_FLAG_RESTORE |
227 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 | 228 | }, |
5e26d50f LP |
229 | { |
230 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 231 | .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL, |
5e26d50f LP |
232 | .index = 4, |
233 | .size = 1, | |
9eb30d2f | 234 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE, |
5e26d50f | 235 | }, |
c0efd232 LP |
236 | { |
237 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 238 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
239 | .index = 5, |
240 | .size = 2, | |
9eb30d2f LP |
241 | .flags = UVC_CTRL_FLAG_SET_CUR |
242 | | UVC_CTRL_FLAG_GET_RANGE | |
243 | | UVC_CTRL_FLAG_RESTORE | |
244 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
245 | }, |
246 | { | |
247 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 248 | .selector = UVC_CT_FOCUS_RELATIVE_CONTROL, |
5e26d50f LP |
249 | .index = 6, |
250 | .size = 2, | |
9eb30d2f LP |
251 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN |
252 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | |
253 | | UVC_CTRL_FLAG_GET_DEF | |
254 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
255 | }, |
256 | { | |
5e26d50f | 257 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 258 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, |
5e26d50f LP |
259 | .index = 7, |
260 | .size = 2, | |
9eb30d2f LP |
261 | .flags = UVC_CTRL_FLAG_SET_CUR |
262 | | UVC_CTRL_FLAG_GET_RANGE | |
263 | | UVC_CTRL_FLAG_RESTORE | |
264 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
265 | }, |
266 | { | |
267 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 268 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, |
5e26d50f | 269 | .index = 8, |
c0efd232 | 270 | .size = 1, |
9eb30d2f LP |
271 | .flags = UVC_CTRL_FLAG_SET_CUR |
272 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
273 | }, |
274 | { | |
5e26d50f | 275 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 276 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
5e26d50f | 277 | .index = 9, |
c0efd232 | 278 | .size = 2, |
9eb30d2f LP |
279 | .flags = UVC_CTRL_FLAG_SET_CUR |
280 | | UVC_CTRL_FLAG_GET_RANGE | |
281 | | UVC_CTRL_FLAG_RESTORE | |
282 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
283 | }, |
284 | { | |
5e26d50f | 285 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 286 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
5e26d50f LP |
287 | .index = 10, |
288 | .size = 3, | |
9eb30d2f LP |
289 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN |
290 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | |
291 | | UVC_CTRL_FLAG_GET_DEF | |
292 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
293 | }, |
294 | { | |
295 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 296 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, |
5e26d50f LP |
297 | .index = 11, |
298 | .size = 8, | |
9eb30d2f LP |
299 | .flags = UVC_CTRL_FLAG_SET_CUR |
300 | | UVC_CTRL_FLAG_GET_RANGE | |
301 | | UVC_CTRL_FLAG_RESTORE | |
302 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
303 | }, |
304 | { | |
305 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 306 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, |
5e26d50f LP |
307 | .index = 12, |
308 | .size = 4, | |
3ea37523 VP |
309 | .flags = UVC_CTRL_FLAG_SET_CUR |
310 | | UVC_CTRL_FLAG_GET_RANGE | |
9eb30d2f | 311 | | UVC_CTRL_FLAG_AUTO_UPDATE, |
5e26d50f LP |
312 | }, |
313 | { | |
314 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 315 | .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL, |
c0efd232 | 316 | .index = 13, |
5e26d50f | 317 | .size = 2, |
9eb30d2f LP |
318 | .flags = UVC_CTRL_FLAG_SET_CUR |
319 | | UVC_CTRL_FLAG_GET_RANGE | |
320 | | UVC_CTRL_FLAG_RESTORE | |
321 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
322 | }, |
323 | { | |
324 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 325 | .selector = UVC_CT_ROLL_RELATIVE_CONTROL, |
5e26d50f LP |
326 | .index = 14, |
327 | .size = 2, | |
9eb30d2f LP |
328 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN |
329 | | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | |
330 | | UVC_CTRL_FLAG_GET_DEF | |
331 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
5e26d50f LP |
332 | }, |
333 | { | |
334 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 335 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
5e26d50f | 336 | .index = 17, |
c0efd232 | 337 | .size = 1, |
9eb30d2f LP |
338 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
339 | | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, | |
c0efd232 LP |
340 | }, |
341 | { | |
5e26d50f | 342 | .entity = UVC_GUID_UVC_CAMERA, |
b482d923 | 343 | .selector = UVC_CT_PRIVACY_CONTROL, |
5e26d50f LP |
344 | .index = 18, |
345 | .size = 1, | |
9eb30d2f LP |
346 | .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR |
347 | | UVC_CTRL_FLAG_RESTORE | |
348 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
c0efd232 LP |
349 | }, |
350 | }; | |
351 | ||
52a4eb31 | 352 | static const struct uvc_menu_info power_line_frequency_controls[] = { |
c0efd232 LP |
353 | { 0, "Disabled" }, |
354 | { 1, "50 Hz" }, | |
355 | { 2, "60 Hz" }, | |
356 | }; | |
357 | ||
52a4eb31 | 358 | static const struct uvc_menu_info exposure_auto_controls[] = { |
c0efd232 | 359 | { 2, "Auto Mode" }, |
90ac5ea3 | 360 | { 1, "Manual Mode" }, |
c0efd232 LP |
361 | { 4, "Shutter Priority Mode" }, |
362 | { 8, "Aperture Priority Mode" }, | |
363 | }; | |
364 | ||
2c6b222c LP |
365 | static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, |
366 | u8 query, const u8 *data) | |
9768352a | 367 | { |
2c6b222c | 368 | s8 zoom = (s8)data[0]; |
9768352a LP |
369 | |
370 | switch (query) { | |
b482d923 | 371 | case UVC_GET_CUR: |
9768352a LP |
372 | return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); |
373 | ||
b482d923 LP |
374 | case UVC_GET_MIN: |
375 | case UVC_GET_MAX: | |
376 | case UVC_GET_RES: | |
377 | case UVC_GET_DEF: | |
9768352a LP |
378 | default: |
379 | return data[2]; | |
380 | } | |
381 | } | |
382 | ||
383 | static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, | |
2c6b222c | 384 | s32 value, u8 *data) |
9768352a LP |
385 | { |
386 | data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
2e896133 | 387 | data[2] = min((int)abs(value), 0xff); |
9768352a LP |
388 | } |
389 | ||
2c6b222c LP |
390 | static s32 uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping, |
391 | u8 query, const u8 *data) | |
3ea37523 VP |
392 | { |
393 | unsigned int first = mapping->offset / 8; | |
2c6b222c | 394 | s8 rel = (s8)data[first]; |
3ea37523 VP |
395 | |
396 | switch (query) { | |
397 | case UVC_GET_CUR: | |
398 | return (rel == 0) ? 0 : (rel > 0 ? data[first+1] | |
399 | : -data[first+1]); | |
400 | case UVC_GET_MIN: | |
401 | return -data[first+1]; | |
402 | case UVC_GET_MAX: | |
403 | case UVC_GET_RES: | |
404 | case UVC_GET_DEF: | |
405 | default: | |
406 | return data[first+1]; | |
407 | } | |
408 | } | |
409 | ||
410 | static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping, | |
2c6b222c | 411 | s32 value, u8 *data) |
3ea37523 VP |
412 | { |
413 | unsigned int first = mapping->offset / 8; | |
414 | ||
415 | data[first] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
416 | data[first+1] = min_t(int, abs(value), 0xff); | |
417 | } | |
418 | ||
8643d237 | 419 | static const struct uvc_control_mapping uvc_ctrl_mappings[] = { |
c0efd232 LP |
420 | { |
421 | .id = V4L2_CID_BRIGHTNESS, | |
422 | .name = "Brightness", | |
423 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 424 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
425 | .size = 16, |
426 | .offset = 0, | |
427 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
428 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
429 | }, | |
430 | { | |
431 | .id = V4L2_CID_CONTRAST, | |
432 | .name = "Contrast", | |
433 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 434 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
435 | .size = 16, |
436 | .offset = 0, | |
437 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
438 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
439 | }, | |
440 | { | |
441 | .id = V4L2_CID_HUE, | |
442 | .name = "Hue", | |
443 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 444 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
445 | .size = 16, |
446 | .offset = 0, | |
447 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
448 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
449 | .master_id = V4L2_CID_HUE_AUTO, |
450 | .master_manual = 0, | |
c0efd232 LP |
451 | }, |
452 | { | |
453 | .id = V4L2_CID_SATURATION, | |
454 | .name = "Saturation", | |
455 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 456 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
457 | .size = 16, |
458 | .offset = 0, | |
459 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
460 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
461 | }, | |
462 | { | |
463 | .id = V4L2_CID_SHARPNESS, | |
464 | .name = "Sharpness", | |
465 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 466 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
467 | .size = 16, |
468 | .offset = 0, | |
469 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
470 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
471 | }, | |
472 | { | |
473 | .id = V4L2_CID_GAMMA, | |
474 | .name = "Gamma", | |
475 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 476 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
477 | .size = 16, |
478 | .offset = 0, | |
479 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
480 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
481 | }, | |
482 | { | |
483 | .id = V4L2_CID_BACKLIGHT_COMPENSATION, | |
484 | .name = "Backlight Compensation", | |
485 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 486 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
487 | .size = 16, |
488 | .offset = 0, | |
489 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
490 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
491 | }, | |
492 | { | |
493 | .id = V4L2_CID_GAIN, | |
494 | .name = "Gain", | |
495 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 496 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
497 | .size = 16, |
498 | .offset = 0, | |
499 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
500 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
501 | }, | |
502 | { | |
503 | .id = V4L2_CID_POWER_LINE_FREQUENCY, | |
504 | .name = "Power Line Frequency", | |
505 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 506 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
507 | .size = 2, |
508 | .offset = 0, | |
509 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
510 | .data_type = UVC_CTRL_DATA_TYPE_ENUM, | |
511 | .menu_info = power_line_frequency_controls, | |
512 | .menu_count = ARRAY_SIZE(power_line_frequency_controls), | |
513 | }, | |
514 | { | |
515 | .id = V4L2_CID_HUE_AUTO, | |
516 | .name = "Hue, Auto", | |
517 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 518 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
519 | .size = 1, |
520 | .offset = 0, | |
521 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
522 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 523 | .slave_ids = { V4L2_CID_HUE, }, |
c0efd232 LP |
524 | }, |
525 | { | |
526 | .id = V4L2_CID_EXPOSURE_AUTO, | |
527 | .name = "Exposure, Auto", | |
528 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 529 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
530 | .size = 4, |
531 | .offset = 0, | |
532 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
533 | .data_type = UVC_CTRL_DATA_TYPE_BITMASK, | |
534 | .menu_info = exposure_auto_controls, | |
535 | .menu_count = ARRAY_SIZE(exposure_auto_controls), | |
55afeb8a | 536 | .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, |
c0efd232 LP |
537 | }, |
538 | { | |
539 | .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, | |
540 | .name = "Exposure, Auto Priority", | |
541 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 542 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
543 | .size = 1, |
544 | .offset = 0, | |
545 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
546 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
547 | }, | |
548 | { | |
549 | .id = V4L2_CID_EXPOSURE_ABSOLUTE, | |
550 | .name = "Exposure (Absolute)", | |
551 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 552 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
553 | .size = 32, |
554 | .offset = 0, | |
555 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
556 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
557 | .master_id = V4L2_CID_EXPOSURE_AUTO, |
558 | .master_manual = V4L2_EXPOSURE_MANUAL, | |
c0efd232 LP |
559 | }, |
560 | { | |
561 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
562 | .name = "White Balance Temperature, Auto", | |
563 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 564 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
c0efd232 LP |
565 | .size = 1, |
566 | .offset = 0, | |
567 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
568 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 569 | .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, |
c0efd232 LP |
570 | }, |
571 | { | |
572 | .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, | |
573 | .name = "White Balance Temperature", | |
574 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 575 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
c0efd232 LP |
576 | .size = 16, |
577 | .offset = 0, | |
578 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
579 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
580 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
581 | .master_manual = 0, | |
c0efd232 LP |
582 | }, |
583 | { | |
584 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
585 | .name = "White Balance Component, Auto", | |
586 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 587 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
c0efd232 LP |
588 | .size = 1, |
589 | .offset = 0, | |
590 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
591 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a HG |
592 | .slave_ids = { V4L2_CID_BLUE_BALANCE, |
593 | V4L2_CID_RED_BALANCE }, | |
c0efd232 LP |
594 | }, |
595 | { | |
596 | .id = V4L2_CID_BLUE_BALANCE, | |
597 | .name = "White Balance Blue Component", | |
598 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 599 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
600 | .size = 16, |
601 | .offset = 0, | |
602 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
603 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
604 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
605 | .master_manual = 0, | |
c0efd232 LP |
606 | }, |
607 | { | |
608 | .id = V4L2_CID_RED_BALANCE, | |
609 | .name = "White Balance Red Component", | |
610 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 611 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
612 | .size = 16, |
613 | .offset = 16, | |
614 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
615 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
616 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
617 | .master_manual = 0, | |
c0efd232 LP |
618 | }, |
619 | { | |
620 | .id = V4L2_CID_FOCUS_ABSOLUTE, | |
621 | .name = "Focus (absolute)", | |
622 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 623 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
624 | .size = 16, |
625 | .offset = 0, | |
626 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
627 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
628 | .master_id = V4L2_CID_FOCUS_AUTO, |
629 | .master_manual = 0, | |
c0efd232 LP |
630 | }, |
631 | { | |
632 | .id = V4L2_CID_FOCUS_AUTO, | |
633 | .name = "Focus, Auto", | |
634 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 635 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
c0efd232 LP |
636 | .size = 1, |
637 | .offset = 0, | |
638 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
639 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 640 | .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, |
c0efd232 | 641 | }, |
35a00c41 LP |
642 | { |
643 | .id = V4L2_CID_IRIS_ABSOLUTE, | |
644 | .name = "Iris, Absolute", | |
645 | .entity = UVC_GUID_UVC_CAMERA, | |
646 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | |
647 | .size = 16, | |
648 | .offset = 0, | |
649 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
650 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
651 | }, | |
652 | { | |
653 | .id = V4L2_CID_IRIS_RELATIVE, | |
654 | .name = "Iris, Relative", | |
655 | .entity = UVC_GUID_UVC_CAMERA, | |
656 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | |
657 | .size = 8, | |
658 | .offset = 0, | |
659 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
660 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
661 | }, | |
9768352a LP |
662 | { |
663 | .id = V4L2_CID_ZOOM_ABSOLUTE, | |
664 | .name = "Zoom, Absolute", | |
665 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 666 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
9768352a LP |
667 | .size = 16, |
668 | .offset = 0, | |
669 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
670 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
671 | }, | |
672 | { | |
673 | .id = V4L2_CID_ZOOM_CONTINUOUS, | |
674 | .name = "Zoom, Continuous", | |
675 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 676 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
9768352a LP |
677 | .size = 0, |
678 | .offset = 0, | |
679 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
680 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
681 | .get = uvc_ctrl_get_zoom, | |
682 | .set = uvc_ctrl_set_zoom, | |
683 | }, | |
e56be916 MR |
684 | { |
685 | .id = V4L2_CID_PAN_ABSOLUTE, | |
686 | .name = "Pan (Absolute)", | |
687 | .entity = UVC_GUID_UVC_CAMERA, | |
688 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
689 | .size = 32, | |
690 | .offset = 0, | |
691 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
8ca5d2d8 | 692 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
e56be916 MR |
693 | }, |
694 | { | |
695 | .id = V4L2_CID_TILT_ABSOLUTE, | |
696 | .name = "Tilt (Absolute)", | |
697 | .entity = UVC_GUID_UVC_CAMERA, | |
698 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
699 | .size = 32, | |
700 | .offset = 32, | |
701 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
8ca5d2d8 | 702 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
e56be916 | 703 | }, |
3ea37523 VP |
704 | { |
705 | .id = V4L2_CID_PAN_SPEED, | |
706 | .name = "Pan (Speed)", | |
707 | .entity = UVC_GUID_UVC_CAMERA, | |
708 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, | |
709 | .size = 16, | |
710 | .offset = 0, | |
711 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
712 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
713 | .get = uvc_ctrl_get_rel_speed, | |
714 | .set = uvc_ctrl_set_rel_speed, | |
715 | }, | |
716 | { | |
717 | .id = V4L2_CID_TILT_SPEED, | |
718 | .name = "Tilt (Speed)", | |
719 | .entity = UVC_GUID_UVC_CAMERA, | |
720 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, | |
721 | .size = 16, | |
722 | .offset = 16, | |
723 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
724 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
725 | .get = uvc_ctrl_get_rel_speed, | |
726 | .set = uvc_ctrl_set_rel_speed, | |
727 | }, | |
6df126f8 LP |
728 | { |
729 | .id = V4L2_CID_PRIVACY, | |
730 | .name = "Privacy", | |
731 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 732 | .selector = UVC_CT_PRIVACY_CONTROL, |
6df126f8 LP |
733 | .size = 1, |
734 | .offset = 0, | |
735 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
736 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
737 | }, | |
c0efd232 LP |
738 | }; |
739 | ||
740 | /* ------------------------------------------------------------------------ | |
741 | * Utility functions | |
742 | */ | |
743 | ||
2c6b222c | 744 | static inline u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) |
c0efd232 | 745 | { |
071c8bb8 | 746 | return ctrl->uvc_data + id * ctrl->info.size; |
c0efd232 LP |
747 | } |
748 | ||
2c6b222c | 749 | static inline int uvc_test_bit(const u8 *data, int bit) |
c0efd232 LP |
750 | { |
751 | return (data[bit >> 3] >> (bit & 7)) & 1; | |
752 | } | |
753 | ||
2c6b222c | 754 | static inline void uvc_clear_bit(u8 *data, int bit) |
2bdd29cf LP |
755 | { |
756 | data[bit >> 3] &= ~(1 << (bit & 7)); | |
757 | } | |
758 | ||
c0efd232 LP |
759 | /* Extract the bit string specified by mapping->offset and mapping->size |
760 | * from the little-endian data stored at 'data' and return the result as | |
761 | * a signed 32bit integer. Sign extension will be performed if the mapping | |
762 | * references a signed data type. | |
763 | */ | |
2c6b222c LP |
764 | static s32 uvc_get_le_value(struct uvc_control_mapping *mapping, |
765 | u8 query, const u8 *data) | |
c0efd232 LP |
766 | { |
767 | int bits = mapping->size; | |
768 | int offset = mapping->offset; | |
2c6b222c LP |
769 | s32 value = 0; |
770 | u8 mask; | |
c0efd232 LP |
771 | |
772 | data += offset / 8; | |
773 | offset &= 7; | |
774 | mask = ((1LL << bits) - 1) << offset; | |
775 | ||
776 | for (; bits > 0; data++) { | |
2c6b222c | 777 | u8 byte = *data & mask; |
c0efd232 LP |
778 | value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); |
779 | bits -= 8 - (offset > 0 ? offset : 0); | |
780 | offset -= 8; | |
781 | mask = (1 << bits) - 1; | |
782 | } | |
783 | ||
2c2d264b | 784 | /* Sign-extend the value if needed. */ |
c0efd232 LP |
785 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
786 | value |= -(value & (1 << (mapping->size - 1))); | |
787 | ||
788 | return value; | |
789 | } | |
790 | ||
791 | /* Set the bit string specified by mapping->offset and mapping->size | |
792 | * in the little-endian data stored at 'data' to the value 'value'. | |
793 | */ | |
9768352a | 794 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, |
2c6b222c | 795 | s32 value, u8 *data) |
c0efd232 LP |
796 | { |
797 | int bits = mapping->size; | |
798 | int offset = mapping->offset; | |
2c6b222c | 799 | u8 mask; |
c0efd232 | 800 | |
3653639e HG |
801 | /* According to the v4l2 spec, writing any value to a button control |
802 | * should result in the action belonging to the button control being | |
803 | * triggered. UVC devices however want to see a 1 written -> override | |
804 | * value. | |
805 | */ | |
806 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) | |
807 | value = -1; | |
808 | ||
c0efd232 LP |
809 | data += offset / 8; |
810 | offset &= 7; | |
811 | ||
812 | for (; bits > 0; data++) { | |
813 | mask = ((1LL << bits) - 1) << offset; | |
814 | *data = (*data & ~mask) | ((value << offset) & mask); | |
815 | value >>= offset ? offset : 8; | |
816 | bits -= 8 - offset; | |
817 | offset = 0; | |
818 | } | |
819 | } | |
820 | ||
821 | /* ------------------------------------------------------------------------ | |
822 | * Terminal and unit management | |
823 | */ | |
824 | ||
2c6b222c LP |
825 | static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; |
826 | static const u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; | |
827 | static const u8 uvc_media_transport_input_guid[16] = | |
c0efd232 LP |
828 | UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; |
829 | ||
f9d81df9 | 830 | static int uvc_entity_match_guid(const struct uvc_entity *entity, |
2c6b222c | 831 | const u8 guid[16]) |
c0efd232 LP |
832 | { |
833 | switch (UVC_ENTITY_TYPE(entity)) { | |
b482d923 | 834 | case UVC_ITT_CAMERA: |
c0efd232 LP |
835 | return memcmp(uvc_camera_guid, guid, 16) == 0; |
836 | ||
b482d923 | 837 | case UVC_ITT_MEDIA_TRANSPORT_INPUT: |
c0efd232 LP |
838 | return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
839 | ||
b482d923 | 840 | case UVC_VC_PROCESSING_UNIT: |
c0efd232 LP |
841 | return memcmp(uvc_processing_guid, guid, 16) == 0; |
842 | ||
b482d923 | 843 | case UVC_VC_EXTENSION_UNIT: |
c0efd232 LP |
844 | return memcmp(entity->extension.guidExtensionCode, |
845 | guid, 16) == 0; | |
846 | ||
847 | default: | |
848 | return 0; | |
849 | } | |
850 | } | |
851 | ||
852 | /* ------------------------------------------------------------------------ | |
853 | * UVC Controls | |
854 | */ | |
855 | ||
2c6b222c | 856 | static void __uvc_find_control(struct uvc_entity *entity, u32 v4l2_id, |
c0efd232 LP |
857 | struct uvc_control_mapping **mapping, struct uvc_control **control, |
858 | int next) | |
859 | { | |
860 | struct uvc_control *ctrl; | |
861 | struct uvc_control_mapping *map; | |
862 | unsigned int i; | |
863 | ||
864 | if (entity == NULL) | |
865 | return; | |
866 | ||
867 | for (i = 0; i < entity->ncontrols; ++i) { | |
868 | ctrl = &entity->controls[i]; | |
071c8bb8 | 869 | if (!ctrl->initialized) |
c0efd232 LP |
870 | continue; |
871 | ||
071c8bb8 | 872 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
c0efd232 LP |
873 | if ((map->id == v4l2_id) && !next) { |
874 | *control = ctrl; | |
875 | *mapping = map; | |
876 | return; | |
877 | } | |
878 | ||
879 | if ((*mapping == NULL || (*mapping)->id > map->id) && | |
880 | (map->id > v4l2_id) && next) { | |
881 | *control = ctrl; | |
882 | *mapping = map; | |
883 | } | |
884 | } | |
885 | } | |
886 | } | |
887 | ||
23d9f3ef | 888 | static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, |
2c6b222c | 889 | u32 v4l2_id, struct uvc_control_mapping **mapping) |
c0efd232 LP |
890 | { |
891 | struct uvc_control *ctrl = NULL; | |
892 | struct uvc_entity *entity; | |
893 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | |
894 | ||
895 | *mapping = NULL; | |
896 | ||
897 | /* Mask the query flags. */ | |
898 | v4l2_id &= V4L2_CTRL_ID_MASK; | |
899 | ||
900 | /* Find the control. */ | |
6241d8ca | 901 | list_for_each_entry(entity, &chain->entities, chain) { |
c0efd232 LP |
902 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
903 | if (ctrl && !next) | |
904 | return ctrl; | |
905 | } | |
906 | ||
907 | if (ctrl == NULL && !next) | |
908 | uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", | |
909 | v4l2_id); | |
910 | ||
911 | return ctrl; | |
912 | } | |
913 | ||
59529081 LP |
914 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, |
915 | struct uvc_control *ctrl) | |
916 | { | |
917 | int ret; | |
918 | ||
9eb30d2f | 919 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 | 920 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, |
071c8bb8 | 921 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 922 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), |
071c8bb8 | 923 | ctrl->info.size); |
59529081 LP |
924 | if (ret < 0) |
925 | return ret; | |
926 | } | |
927 | ||
9eb30d2f | 928 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { |
59529081 | 929 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, |
071c8bb8 | 930 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 931 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), |
071c8bb8 | 932 | ctrl->info.size); |
59529081 LP |
933 | if (ret < 0) |
934 | return ret; | |
935 | } | |
9eb30d2f | 936 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { |
59529081 | 937 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, |
071c8bb8 | 938 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 939 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), |
071c8bb8 | 940 | ctrl->info.size); |
59529081 LP |
941 | if (ret < 0) |
942 | return ret; | |
943 | } | |
9eb30d2f | 944 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { |
59529081 | 945 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, |
071c8bb8 | 946 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 947 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), |
071c8bb8 | 948 | ctrl->info.size); |
c4d99f89 LP |
949 | if (ret < 0) { |
950 | if (UVC_ENTITY_TYPE(ctrl->entity) != | |
951 | UVC_VC_EXTENSION_UNIT) | |
952 | return ret; | |
953 | ||
954 | /* GET_RES is mandatory for XU controls, but some | |
955 | * cameras still choke on it. Ignore errors and set the | |
956 | * resolution value to zero. | |
957 | */ | |
958 | uvc_warn_once(chain->dev, UVC_WARN_XU_GET_RES, | |
959 | "UVC non compliance - GET_RES failed on " | |
960 | "an XU control. Enabling workaround.\n"); | |
961 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), 0, | |
962 | ctrl->info.size); | |
963 | } | |
59529081 LP |
964 | } |
965 | ||
966 | ctrl->cached = 1; | |
967 | return 0; | |
968 | } | |
969 | ||
e5225c82 GL |
970 | static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, |
971 | const u8 *data) | |
972 | { | |
973 | s32 value = mapping->get(mapping, UVC_GET_CUR, data); | |
974 | ||
975 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { | |
52a4eb31 | 976 | const struct uvc_menu_info *menu = mapping->menu_info; |
e5225c82 GL |
977 | unsigned int i; |
978 | ||
979 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
980 | if (menu->value == value) { | |
981 | value = i; | |
982 | break; | |
983 | } | |
984 | } | |
985 | } | |
986 | ||
987 | return value; | |
988 | } | |
989 | ||
cb74d482 HG |
990 | static int __uvc_ctrl_get(struct uvc_video_chain *chain, |
991 | struct uvc_control *ctrl, struct uvc_control_mapping *mapping, | |
992 | s32 *value) | |
993 | { | |
cb74d482 HG |
994 | int ret; |
995 | ||
996 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) | |
30ecb936 | 997 | return -EACCES; |
cb74d482 HG |
998 | |
999 | if (!ctrl->loaded) { | |
1000 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, | |
1001 | chain->dev->intfnum, ctrl->info.selector, | |
1002 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1003 | ctrl->info.size); | |
1004 | if (ret < 0) | |
1005 | return ret; | |
1006 | ||
1007 | ctrl->loaded = 1; | |
1008 | } | |
1009 | ||
e5225c82 GL |
1010 | *value = __uvc_ctrl_get_value(mapping, |
1011 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
cb74d482 HG |
1012 | |
1013 | return 0; | |
1014 | } | |
1015 | ||
35f16741 HG |
1016 | static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, |
1017 | struct uvc_control *ctrl, | |
1018 | struct uvc_control_mapping *mapping, | |
c0efd232 LP |
1019 | struct v4l2_queryctrl *v4l2_ctrl) |
1020 | { | |
55afeb8a HG |
1021 | struct uvc_control_mapping *master_map = NULL; |
1022 | struct uvc_control *master_ctrl = NULL; | |
52a4eb31 | 1023 | const struct uvc_menu_info *menu; |
c0efd232 | 1024 | unsigned int i; |
c0efd232 | 1025 | |
f14d4988 | 1026 | memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); |
c0efd232 LP |
1027 | v4l2_ctrl->id = mapping->id; |
1028 | v4l2_ctrl->type = mapping->v4l2_type; | |
c0decac1 | 1029 | strscpy(v4l2_ctrl->name, mapping->name, sizeof(v4l2_ctrl->name)); |
c0efd232 LP |
1030 | v4l2_ctrl->flags = 0; |
1031 | ||
9eb30d2f | 1032 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) |
a90ef69c | 1033 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; |
9eb30d2f | 1034 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) |
c0efd232 LP |
1035 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
1036 | ||
55afeb8a HG |
1037 | if (mapping->master_id) |
1038 | __uvc_find_control(ctrl->entity, mapping->master_id, | |
1039 | &master_map, &master_ctrl, 0); | |
1040 | if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { | |
1041 | s32 val; | |
1042 | int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); | |
1043 | if (ret < 0) | |
1044 | return ret; | |
1045 | ||
1046 | if (val != mapping->master_manual) | |
1047 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
1048 | } | |
1049 | ||
59529081 | 1050 | if (!ctrl->cached) { |
35f16741 | 1051 | int ret = uvc_ctrl_populate_cache(chain, ctrl); |
b482d923 | 1052 | if (ret < 0) |
35f16741 | 1053 | return ret; |
59529081 LP |
1054 | } |
1055 | ||
9eb30d2f | 1056 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 LP |
1057 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, |
1058 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | |
c0efd232 LP |
1059 | } |
1060 | ||
54812c77 LP |
1061 | switch (mapping->v4l2_type) { |
1062 | case V4L2_CTRL_TYPE_MENU: | |
c0efd232 LP |
1063 | v4l2_ctrl->minimum = 0; |
1064 | v4l2_ctrl->maximum = mapping->menu_count - 1; | |
1065 | v4l2_ctrl->step = 1; | |
1066 | ||
1067 | menu = mapping->menu_info; | |
1068 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
1069 | if (menu->value == v4l2_ctrl->default_value) { | |
1070 | v4l2_ctrl->default_value = i; | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
35f16741 | 1075 | return 0; |
54812c77 LP |
1076 | |
1077 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1078 | v4l2_ctrl->minimum = 0; | |
1079 | v4l2_ctrl->maximum = 1; | |
1080 | v4l2_ctrl->step = 1; | |
35f16741 | 1081 | return 0; |
54812c77 | 1082 | |
f4eabafe LP |
1083 | case V4L2_CTRL_TYPE_BUTTON: |
1084 | v4l2_ctrl->minimum = 0; | |
1085 | v4l2_ctrl->maximum = 0; | |
1086 | v4l2_ctrl->step = 0; | |
35f16741 | 1087 | return 0; |
f4eabafe | 1088 | |
54812c77 LP |
1089 | default: |
1090 | break; | |
c0efd232 LP |
1091 | } |
1092 | ||
9eb30d2f | 1093 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) |
59529081 LP |
1094 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, |
1095 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
c0efd232 | 1096 | |
9eb30d2f | 1097 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) |
59529081 LP |
1098 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, |
1099 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1100 | ||
9eb30d2f | 1101 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) |
59529081 LP |
1102 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, |
1103 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1104 | ||
35f16741 HG |
1105 | return 0; |
1106 | } | |
1107 | ||
1108 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, | |
1109 | struct v4l2_queryctrl *v4l2_ctrl) | |
1110 | { | |
1111 | struct uvc_control *ctrl; | |
1112 | struct uvc_control_mapping *mapping; | |
1113 | int ret; | |
1114 | ||
1115 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1116 | if (ret < 0) | |
1117 | return -ERESTARTSYS; | |
1118 | ||
1119 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); | |
1120 | if (ctrl == NULL) { | |
9c016d61 | 1121 | ret = -EINVAL; |
35f16741 HG |
1122 | goto done; |
1123 | } | |
1124 | ||
1125 | ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); | |
27a61c13 LP |
1126 | done: |
1127 | mutex_unlock(&chain->ctrl_mutex); | |
1128 | return ret; | |
c0efd232 LP |
1129 | } |
1130 | ||
23d9f3ef | 1131 | /* |
ec55cdba | 1132 | * Mapping V4L2 controls to UVC controls can be straightforward if done well. |
23d9f3ef LP |
1133 | * Most of the UVC controls exist in V4L2, and can be mapped directly. Some |
1134 | * must be grouped (for instance the Red Balance, Blue Balance and Do White | |
1135 | * Balance V4L2 controls use the White Balance Component UVC control) or | |
1136 | * otherwise translated. The approach we take here is to use a translation | |
1137 | * table for the controls that can be mapped directly, and handle the others | |
1138 | * manually. | |
1139 | */ | |
1140 | int uvc_query_v4l2_menu(struct uvc_video_chain *chain, | |
1141 | struct v4l2_querymenu *query_menu) | |
1142 | { | |
52a4eb31 | 1143 | const struct uvc_menu_info *menu_info; |
23d9f3ef LP |
1144 | struct uvc_control_mapping *mapping; |
1145 | struct uvc_control *ctrl; | |
1146 | u32 index = query_menu->index; | |
1147 | u32 id = query_menu->id; | |
1148 | int ret; | |
1149 | ||
1150 | memset(query_menu, 0, sizeof(*query_menu)); | |
1151 | query_menu->id = id; | |
1152 | query_menu->index = index; | |
1153 | ||
1154 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1155 | if (ret < 0) | |
1156 | return -ERESTARTSYS; | |
1157 | ||
1158 | ctrl = uvc_find_control(chain, query_menu->id, &mapping); | |
9c016d61 RW |
1159 | if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { |
1160 | ret = -EINVAL; | |
23d9f3ef LP |
1161 | goto done; |
1162 | } | |
1163 | ||
9c016d61 | 1164 | if (query_menu->index >= mapping->menu_count) { |
23d9f3ef LP |
1165 | ret = -EINVAL; |
1166 | goto done; | |
1167 | } | |
1168 | ||
1169 | menu_info = &mapping->menu_info[query_menu->index]; | |
fc2d573f | 1170 | |
241fa6e4 HG |
1171 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1172 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
fc2d573f LP |
1173 | s32 bitmap; |
1174 | ||
1175 | if (!ctrl->cached) { | |
1176 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1177 | if (ret < 0) | |
1178 | goto done; | |
1179 | } | |
1180 | ||
1181 | bitmap = mapping->get(mapping, UVC_GET_RES, | |
1182 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1183 | if (!(bitmap & menu_info->value)) { | |
1184 | ret = -EINVAL; | |
1185 | goto done; | |
1186 | } | |
1187 | } | |
1188 | ||
c0decac1 | 1189 | strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name)); |
23d9f3ef LP |
1190 | |
1191 | done: | |
1192 | mutex_unlock(&chain->ctrl_mutex); | |
1193 | return ret; | |
1194 | } | |
1195 | ||
b4012002 HG |
1196 | /* -------------------------------------------------------------------------- |
1197 | * Ctrl event handling | |
1198 | */ | |
1199 | ||
1200 | static void uvc_ctrl_fill_event(struct uvc_video_chain *chain, | |
1201 | struct v4l2_event *ev, | |
1202 | struct uvc_control *ctrl, | |
1203 | struct uvc_control_mapping *mapping, | |
1204 | s32 value, u32 changes) | |
1205 | { | |
1206 | struct v4l2_queryctrl v4l2_ctrl; | |
1207 | ||
1208 | __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl); | |
1209 | ||
f45f3f75 | 1210 | memset(ev, 0, sizeof(*ev)); |
b4012002 HG |
1211 | ev->type = V4L2_EVENT_CTRL; |
1212 | ev->id = v4l2_ctrl.id; | |
1213 | ev->u.ctrl.value = value; | |
1214 | ev->u.ctrl.changes = changes; | |
1215 | ev->u.ctrl.type = v4l2_ctrl.type; | |
1216 | ev->u.ctrl.flags = v4l2_ctrl.flags; | |
1217 | ev->u.ctrl.minimum = v4l2_ctrl.minimum; | |
1218 | ev->u.ctrl.maximum = v4l2_ctrl.maximum; | |
1219 | ev->u.ctrl.step = v4l2_ctrl.step; | |
1220 | ev->u.ctrl.default_value = v4l2_ctrl.default_value; | |
1221 | } | |
1222 | ||
e5225c82 GL |
1223 | /* |
1224 | * Send control change events to all subscribers for the @ctrl control. By | |
1225 | * default the subscriber that generated the event, as identified by @handle, | |
1226 | * is not notified unless it has set the V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK flag. | |
1227 | * @handle can be NULL for asynchronous events related to auto-update controls, | |
1228 | * in which case all subscribers are notified. | |
1229 | */ | |
1230 | static void uvc_ctrl_send_event(struct uvc_video_chain *chain, | |
1231 | struct uvc_fh *handle, struct uvc_control *ctrl, | |
1232 | struct uvc_control_mapping *mapping, s32 value, u32 changes) | |
b4012002 | 1233 | { |
e5225c82 | 1234 | struct v4l2_fh *originator = handle ? &handle->vfh : NULL; |
b4012002 HG |
1235 | struct v4l2_subscribed_event *sev; |
1236 | struct v4l2_event ev; | |
1237 | ||
1238 | if (list_empty(&mapping->ev_subs)) | |
1239 | return; | |
1240 | ||
e5225c82 | 1241 | uvc_ctrl_fill_event(chain, &ev, ctrl, mapping, value, changes); |
b4012002 HG |
1242 | |
1243 | list_for_each_entry(sev, &mapping->ev_subs, node) { | |
e5225c82 | 1244 | if (sev->fh != originator || |
805e9b4a | 1245 | (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || |
222964ea | 1246 | (changes & V4L2_EVENT_CTRL_CH_FLAGS)) |
b4012002 HG |
1247 | v4l2_event_queue_fh(sev->fh, &ev); |
1248 | } | |
1249 | } | |
1250 | ||
e5225c82 GL |
1251 | /* |
1252 | * Send control change events for the slave of the @master control identified | |
1253 | * by the V4L2 ID @slave_id. The @handle identifies the event subscriber that | |
1254 | * generated the event and may be NULL for auto-update events. | |
1255 | */ | |
1256 | static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, | |
1257 | struct uvc_fh *handle, struct uvc_control *master, u32 slave_id) | |
805e9b4a HG |
1258 | { |
1259 | struct uvc_control_mapping *mapping = NULL; | |
1260 | struct uvc_control *ctrl = NULL; | |
1261 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
805e9b4a HG |
1262 | s32 val = 0; |
1263 | ||
805e9b4a HG |
1264 | __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); |
1265 | if (ctrl == NULL) | |
1266 | return; | |
1267 | ||
e5225c82 | 1268 | if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0) |
805e9b4a HG |
1269 | changes |= V4L2_EVENT_CTRL_CH_VALUE; |
1270 | ||
e5225c82 GL |
1271 | uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); |
1272 | } | |
1273 | ||
1274 | static void uvc_ctrl_status_event_work(struct work_struct *work) | |
1275 | { | |
1276 | struct uvc_device *dev = container_of(work, struct uvc_device, | |
1277 | async_ctrl.work); | |
1278 | struct uvc_ctrl_work *w = &dev->async_ctrl; | |
1279 | struct uvc_video_chain *chain = w->chain; | |
1280 | struct uvc_control_mapping *mapping; | |
1281 | struct uvc_control *ctrl = w->ctrl; | |
1282 | struct uvc_fh *handle; | |
1283 | unsigned int i; | |
1284 | int ret; | |
1285 | ||
1286 | mutex_lock(&chain->ctrl_mutex); | |
1287 | ||
1288 | handle = ctrl->handle; | |
1289 | ctrl->handle = NULL; | |
1290 | ||
1291 | list_for_each_entry(mapping, &ctrl->info.mappings, list) { | |
1292 | s32 value = __uvc_ctrl_get_value(mapping, w->data); | |
1293 | ||
1294 | /* | |
1295 | * handle may be NULL here if the device sends auto-update | |
1296 | * events without a prior related control set from userspace. | |
1297 | */ | |
1298 | for (i = 0; i < ARRAY_SIZE(mapping->slave_ids); ++i) { | |
1299 | if (!mapping->slave_ids[i]) | |
1300 | break; | |
1301 | ||
1302 | uvc_ctrl_send_slave_event(chain, handle, ctrl, | |
1303 | mapping->slave_ids[i]); | |
1304 | } | |
1305 | ||
1306 | uvc_ctrl_send_event(chain, handle, ctrl, mapping, value, | |
1307 | V4L2_EVENT_CTRL_CH_VALUE); | |
1308 | } | |
1309 | ||
1310 | mutex_unlock(&chain->ctrl_mutex); | |
1311 | ||
1312 | /* Resubmit the URB. */ | |
1313 | w->urb->interval = dev->int_ep->desc.bInterval; | |
1314 | ret = usb_submit_urb(w->urb, GFP_KERNEL); | |
1315 | if (ret < 0) | |
1316 | uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n", | |
1317 | ret); | |
1318 | } | |
1319 | ||
1320 | bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain, | |
1321 | struct uvc_control *ctrl, const u8 *data) | |
1322 | { | |
1323 | struct uvc_device *dev = chain->dev; | |
1324 | struct uvc_ctrl_work *w = &dev->async_ctrl; | |
1325 | ||
1326 | if (list_empty(&ctrl->info.mappings)) { | |
1327 | ctrl->handle = NULL; | |
1328 | return false; | |
1329 | } | |
1330 | ||
1331 | w->data = data; | |
1332 | w->urb = urb; | |
1333 | w->chain = chain; | |
1334 | w->ctrl = ctrl; | |
1335 | ||
1336 | schedule_work(&w->work); | |
1337 | ||
1338 | return true; | |
1339 | } | |
1340 | ||
1341 | static bool uvc_ctrl_xctrls_has_control(const struct v4l2_ext_control *xctrls, | |
1342 | unsigned int xctrls_count, u32 id) | |
1343 | { | |
1344 | unsigned int i; | |
1345 | ||
1346 | for (i = 0; i < xctrls_count; ++i) { | |
1347 | if (xctrls[i].id == id) | |
1348 | return true; | |
1349 | } | |
1350 | ||
1351 | return false; | |
805e9b4a HG |
1352 | } |
1353 | ||
b4012002 HG |
1354 | static void uvc_ctrl_send_events(struct uvc_fh *handle, |
1355 | const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) | |
1356 | { | |
1357 | struct uvc_control_mapping *mapping; | |
1358 | struct uvc_control *ctrl; | |
805e9b4a | 1359 | u32 changes = V4L2_EVENT_CTRL_CH_VALUE; |
b4012002 | 1360 | unsigned int i; |
805e9b4a | 1361 | unsigned int j; |
b4012002 HG |
1362 | |
1363 | for (i = 0; i < xctrls_count; ++i) { | |
1364 | ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping); | |
805e9b4a | 1365 | |
e5225c82 GL |
1366 | if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) |
1367 | /* Notification will be sent from an Interrupt event. */ | |
1368 | continue; | |
1369 | ||
805e9b4a | 1370 | for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { |
e5225c82 GL |
1371 | u32 slave_id = mapping->slave_ids[j]; |
1372 | ||
1373 | if (!slave_id) | |
805e9b4a | 1374 | break; |
e5225c82 GL |
1375 | |
1376 | /* | |
1377 | * We can skip sending an event for the slave if the | |
1378 | * slave is being modified in the same transaction. | |
1379 | */ | |
1380 | if (uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, | |
1381 | slave_id)) | |
1382 | continue; | |
1383 | ||
1384 | uvc_ctrl_send_slave_event(handle->chain, handle, ctrl, | |
1385 | slave_id); | |
805e9b4a HG |
1386 | } |
1387 | ||
1388 | /* | |
1389 | * If the master is being modified in the same transaction | |
1390 | * flags may change too. | |
1391 | */ | |
e5225c82 GL |
1392 | if (mapping->master_id && |
1393 | uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, | |
1394 | mapping->master_id)) | |
1395 | changes |= V4L2_EVENT_CTRL_CH_FLAGS; | |
805e9b4a | 1396 | |
e5225c82 GL |
1397 | uvc_ctrl_send_event(handle->chain, handle, ctrl, mapping, |
1398 | xctrls[i].value, changes); | |
b4012002 HG |
1399 | } |
1400 | } | |
1401 | ||
6e6d76cd | 1402 | static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) |
b4012002 HG |
1403 | { |
1404 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1405 | struct uvc_control_mapping *mapping; | |
1406 | struct uvc_control *ctrl; | |
1407 | int ret; | |
1408 | ||
1409 | ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex); | |
1410 | if (ret < 0) | |
1411 | return -ERESTARTSYS; | |
1412 | ||
1413 | ctrl = uvc_find_control(handle->chain, sev->id, &mapping); | |
1414 | if (ctrl == NULL) { | |
9c016d61 | 1415 | ret = -EINVAL; |
b4012002 HG |
1416 | goto done; |
1417 | } | |
1418 | ||
1419 | list_add_tail(&sev->node, &mapping->ev_subs); | |
1420 | if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) { | |
1421 | struct v4l2_event ev; | |
1422 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
1423 | s32 val = 0; | |
1424 | ||
1425 | if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) | |
1426 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
1427 | ||
1428 | uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, | |
1429 | changes); | |
6e6d76cd HV |
1430 | /* Mark the queue as active, allowing this initial |
1431 | event to be accepted. */ | |
1432 | sev->elems = elems; | |
b4012002 HG |
1433 | v4l2_event_queue_fh(sev->fh, &ev); |
1434 | } | |
1435 | ||
1436 | done: | |
1437 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev) | |
1442 | { | |
1443 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1444 | ||
1445 | mutex_lock(&handle->chain->ctrl_mutex); | |
1446 | list_del(&sev->node); | |
1447 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1448 | } | |
1449 | ||
1450 | const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = { | |
1451 | .add = uvc_ctrl_add_event, | |
1452 | .del = uvc_ctrl_del_event, | |
1453 | .replace = v4l2_ctrl_replace, | |
1454 | .merge = v4l2_ctrl_merge, | |
1455 | }; | |
c0efd232 LP |
1456 | |
1457 | /* -------------------------------------------------------------------------- | |
1458 | * Control transactions | |
1459 | * | |
1460 | * To make extended set operations as atomic as the hardware allows, controls | |
1461 | * are handled using begin/commit/rollback operations. | |
1462 | * | |
1463 | * At the beginning of a set request, uvc_ctrl_begin should be called to | |
1464 | * initialize the request. This function acquires the control lock. | |
1465 | * | |
1466 | * When setting a control, the new value is stored in the control data field | |
1467 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | |
1468 | * later processing. If the UVC and V4L2 control sizes differ, the current | |
1469 | * value is loaded from the hardware before storing the new value in the data | |
1470 | * field. | |
1471 | * | |
1472 | * After processing all controls in the transaction, uvc_ctrl_commit or | |
1473 | * uvc_ctrl_rollback must be called to apply the pending changes to the | |
1474 | * hardware or revert them. When applying changes, all controls marked as | |
1475 | * dirty will be modified in the UVC device, and the dirty flag will be | |
1476 | * cleared. When reverting controls, the control data field | |
1477 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | |
1478 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | |
1479 | * control lock. | |
1480 | */ | |
8e113595 | 1481 | int uvc_ctrl_begin(struct uvc_video_chain *chain) |
c0efd232 | 1482 | { |
8e113595 | 1483 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; |
c0efd232 LP |
1484 | } |
1485 | ||
1486 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | |
1487 | struct uvc_entity *entity, int rollback) | |
1488 | { | |
1489 | struct uvc_control *ctrl; | |
1490 | unsigned int i; | |
1491 | int ret; | |
1492 | ||
1493 | if (entity == NULL) | |
1494 | return 0; | |
1495 | ||
1496 | for (i = 0; i < entity->ncontrols; ++i) { | |
1497 | ctrl = &entity->controls[i]; | |
071c8bb8 | 1498 | if (!ctrl->initialized) |
b1accfa1 LP |
1499 | continue; |
1500 | ||
1501 | /* Reset the loaded flag for auto-update controls that were | |
1502 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | |
6b363f9f LP |
1503 | * uvc_ctrl_get from using the cached value, and for write-only |
1504 | * controls to prevent uvc_ctrl_set from setting bits not | |
1505 | * explicitly set by the user. | |
b1accfa1 | 1506 | */ |
6b363f9f LP |
1507 | if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE || |
1508 | !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) | |
b1accfa1 LP |
1509 | ctrl->loaded = 0; |
1510 | ||
1511 | if (!ctrl->dirty) | |
c0efd232 LP |
1512 | continue; |
1513 | ||
1514 | if (!rollback) | |
b482d923 | 1515 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, |
071c8bb8 | 1516 | dev->intfnum, ctrl->info.selector, |
c0efd232 | 1517 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1518 | ctrl->info.size); |
c0efd232 LP |
1519 | else |
1520 | ret = 0; | |
1521 | ||
1522 | if (rollback || ret < 0) | |
1523 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1524 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
071c8bb8 | 1525 | ctrl->info.size); |
c0efd232 | 1526 | |
c0efd232 LP |
1527 | ctrl->dirty = 0; |
1528 | ||
1529 | if (ret < 0) | |
1530 | return ret; | |
1531 | } | |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
b4012002 HG |
1536 | int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, |
1537 | const struct v4l2_ext_control *xctrls, | |
1538 | unsigned int xctrls_count) | |
c0efd232 | 1539 | { |
b4012002 | 1540 | struct uvc_video_chain *chain = handle->chain; |
c0efd232 LP |
1541 | struct uvc_entity *entity; |
1542 | int ret = 0; | |
1543 | ||
1544 | /* Find the control. */ | |
6241d8ca | 1545 | list_for_each_entry(entity, &chain->entities, chain) { |
8e113595 | 1546 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); |
c0efd232 LP |
1547 | if (ret < 0) |
1548 | goto done; | |
1549 | } | |
1550 | ||
b4012002 HG |
1551 | if (!rollback) |
1552 | uvc_ctrl_send_events(handle, xctrls, xctrls_count); | |
c0efd232 | 1553 | done: |
8e113595 | 1554 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1555 | return ret; |
1556 | } | |
1557 | ||
35f16741 HG |
1558 | int uvc_ctrl_get(struct uvc_video_chain *chain, |
1559 | struct v4l2_ext_control *xctrl) | |
1560 | { | |
1561 | struct uvc_control *ctrl; | |
1562 | struct uvc_control_mapping *mapping; | |
1563 | ||
1564 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); | |
1565 | if (ctrl == NULL) | |
9c016d61 | 1566 | return -EINVAL; |
35f16741 HG |
1567 | |
1568 | return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); | |
1569 | } | |
1570 | ||
e5225c82 | 1571 | int uvc_ctrl_set(struct uvc_fh *handle, |
c0efd232 LP |
1572 | struct v4l2_ext_control *xctrl) |
1573 | { | |
e5225c82 | 1574 | struct uvc_video_chain *chain = handle->chain; |
c0efd232 LP |
1575 | struct uvc_control *ctrl; |
1576 | struct uvc_control_mapping *mapping; | |
e54532e5 LP |
1577 | s32 value; |
1578 | u32 step; | |
1579 | s32 min; | |
1580 | s32 max; | |
c0efd232 LP |
1581 | int ret; |
1582 | ||
8e113595 | 1583 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
9bf42300 | 1584 | if (ctrl == NULL) |
9c016d61 | 1585 | return -EINVAL; |
9bf42300 LP |
1586 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) |
1587 | return -EACCES; | |
c0efd232 | 1588 | |
e54532e5 LP |
1589 | /* Clamp out of range values. */ |
1590 | switch (mapping->v4l2_type) { | |
1591 | case V4L2_CTRL_TYPE_INTEGER: | |
1592 | if (!ctrl->cached) { | |
1593 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1594 | if (ret < 0) | |
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | min = mapping->get(mapping, UVC_GET_MIN, | |
1599 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
1600 | max = mapping->get(mapping, UVC_GET_MAX, | |
1601 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1602 | step = mapping->get(mapping, UVC_GET_RES, | |
1603 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
cf7a50ee LP |
1604 | if (step == 0) |
1605 | step = 1; | |
e54532e5 | 1606 | |
64ae9958 LP |
1607 | xctrl->value = min + ((u32)(xctrl->value - min) + step / 2) |
1608 | / step * step; | |
1609 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) | |
1610 | xctrl->value = clamp(xctrl->value, min, max); | |
1611 | else | |
1612 | xctrl->value = clamp_t(u32, xctrl->value, min, max); | |
e54532e5 LP |
1613 | value = xctrl->value; |
1614 | break; | |
1615 | ||
1616 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1617 | xctrl->value = clamp(xctrl->value, 0, 1); | |
1618 | value = xctrl->value; | |
1619 | break; | |
1620 | ||
1621 | case V4L2_CTRL_TYPE_MENU: | |
1622 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | |
8a4e76c1 | 1623 | return -ERANGE; |
e54532e5 | 1624 | value = mapping->menu_info[xctrl->value].value; |
f411f103 LP |
1625 | |
1626 | /* Valid menu indices are reported by the GET_RES request for | |
1627 | * UVC controls that support it. | |
1628 | */ | |
241fa6e4 HG |
1629 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1630 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
f411f103 LP |
1631 | if (!ctrl->cached) { |
1632 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1633 | if (ret < 0) | |
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | step = mapping->get(mapping, UVC_GET_RES, | |
1638 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1639 | if (!(step & value)) | |
b4186971 | 1640 | return -EINVAL; |
f411f103 LP |
1641 | } |
1642 | ||
e54532e5 LP |
1643 | break; |
1644 | ||
1645 | default: | |
1646 | value = xctrl->value; | |
1647 | break; | |
c0efd232 LP |
1648 | } |
1649 | ||
e54532e5 LP |
1650 | /* If the mapping doesn't span the whole UVC control, the current value |
1651 | * needs to be loaded from the device to perform the read-modify-write | |
1652 | * operation. | |
1653 | */ | |
071c8bb8 | 1654 | if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) { |
9eb30d2f | 1655 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { |
c0efd232 | 1656 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1657 | 0, ctrl->info.size); |
c0efd232 | 1658 | } else { |
8e113595 LP |
1659 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
1660 | ctrl->entity->id, chain->dev->intfnum, | |
071c8bb8 | 1661 | ctrl->info.selector, |
c0efd232 | 1662 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1663 | ctrl->info.size); |
c0efd232 LP |
1664 | if (ret < 0) |
1665 | return ret; | |
1666 | } | |
1667 | ||
b1accfa1 | 1668 | ctrl->loaded = 1; |
c0efd232 LP |
1669 | } |
1670 | ||
e54532e5 | 1671 | /* Backup the current value in case we need to rollback later. */ |
c0efd232 LP |
1672 | if (!ctrl->dirty) { |
1673 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1674 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
071c8bb8 | 1675 | ctrl->info.size); |
c0efd232 LP |
1676 | } |
1677 | ||
9768352a LP |
1678 | mapping->set(mapping, value, |
1679 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
c0efd232 | 1680 | |
e5225c82 GL |
1681 | if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) |
1682 | ctrl->handle = handle; | |
1683 | ||
c0efd232 LP |
1684 | ctrl->dirty = 1; |
1685 | ctrl->modified = 1; | |
1686 | return 0; | |
1687 | } | |
1688 | ||
1689 | /* -------------------------------------------------------------------------- | |
1690 | * Dynamic controls | |
1691 | */ | |
1692 | ||
859086ae ET |
1693 | /* |
1694 | * Retrieve flags for a given control | |
1695 | */ | |
1696 | static int uvc_ctrl_get_flags(struct uvc_device *dev, | |
1697 | const struct uvc_control *ctrl, | |
1698 | struct uvc_control_info *info) | |
1699 | { | |
1700 | u8 *data; | |
1701 | int ret; | |
1702 | ||
1703 | data = kmalloc(1, GFP_KERNEL); | |
1704 | if (data == NULL) | |
1705 | return -ENOMEM; | |
1706 | ||
1707 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, | |
1708 | info->selector, data, 1); | |
1709 | if (!ret) | |
0dc68cab KB |
1710 | info->flags |= (data[0] & UVC_CONTROL_CAP_GET ? |
1711 | UVC_CTRL_FLAG_GET_CUR : 0) | |
1712 | | (data[0] & UVC_CONTROL_CAP_SET ? | |
1713 | UVC_CTRL_FLAG_SET_CUR : 0) | |
1714 | | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ? | |
e5225c82 GL |
1715 | UVC_CTRL_FLAG_AUTO_UPDATE : 0) |
1716 | | (data[0] & UVC_CONTROL_CAP_ASYNCHRONOUS ? | |
1717 | UVC_CTRL_FLAG_ASYNCHRONOUS : 0); | |
859086ae ET |
1718 | |
1719 | kfree(data); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
b5977a58 LP |
1723 | static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev, |
1724 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1725 | { | |
1726 | struct uvc_ctrl_fixup { | |
1727 | struct usb_device_id id; | |
1728 | u8 entity; | |
1729 | u8 selector; | |
1730 | u8 flags; | |
1731 | }; | |
1732 | ||
1733 | static const struct uvc_ctrl_fixup fixups[] = { | |
1734 | { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1, | |
9eb30d2f LP |
1735 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1736 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1737 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1738 | { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1, |
9eb30d2f LP |
1739 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1740 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1741 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1742 | { { USB_DEVICE(0x046d, 0x0994) }, 9, 1, |
9eb30d2f LP |
1743 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1744 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1745 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 LP |
1746 | }; |
1747 | ||
1748 | unsigned int i; | |
1749 | ||
1750 | for (i = 0; i < ARRAY_SIZE(fixups); ++i) { | |
1751 | if (!usb_match_one_id(dev->intf, &fixups[i].id)) | |
1752 | continue; | |
1753 | ||
1754 | if (fixups[i].entity == ctrl->entity->id && | |
1755 | fixups[i].selector == info->selector) { | |
1756 | info->flags = fixups[i].flags; | |
1757 | return; | |
1758 | } | |
1759 | } | |
1760 | } | |
1761 | ||
52c58ad6 LP |
1762 | /* |
1763 | * Query control information (size and flags) for XU controls. | |
1764 | */ | |
1765 | static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, | |
1766 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1767 | { | |
1768 | u8 *data; | |
1769 | int ret; | |
1770 | ||
1771 | data = kmalloc(2, GFP_KERNEL); | |
1772 | if (data == NULL) | |
1773 | return -ENOMEM; | |
1774 | ||
1775 | memcpy(info->entity, ctrl->entity->extension.guidExtensionCode, | |
1776 | sizeof(info->entity)); | |
1777 | info->index = ctrl->index; | |
1778 | info->selector = ctrl->index + 1; | |
1779 | ||
1780 | /* Query and verify the control length (GET_LEN) */ | |
1781 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, | |
1782 | info->selector, data, 2); | |
1783 | if (ret < 0) { | |
1784 | uvc_trace(UVC_TRACE_CONTROL, | |
1785 | "GET_LEN failed on control %pUl/%u (%d).\n", | |
1786 | info->entity, info->selector, ret); | |
1787 | goto done; | |
1788 | } | |
1789 | ||
1790 | info->size = le16_to_cpup((__le16 *)data); | |
1791 | ||
0dc68cab KB |
1792 | info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1793 | | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF; | |
1794 | ||
859086ae | 1795 | ret = uvc_ctrl_get_flags(dev, ctrl, info); |
52c58ad6 LP |
1796 | if (ret < 0) { |
1797 | uvc_trace(UVC_TRACE_CONTROL, | |
859086ae | 1798 | "Failed to get flags for control %pUl/%u (%d).\n", |
52c58ad6 LP |
1799 | info->entity, info->selector, ret); |
1800 | goto done; | |
1801 | } | |
1802 | ||
b5977a58 LP |
1803 | uvc_ctrl_fixup_xu_info(dev, ctrl, info); |
1804 | ||
52c58ad6 LP |
1805 | uvc_trace(UVC_TRACE_CONTROL, "XU control %pUl/%u queried: len %u, " |
1806 | "flags { get %u set %u auto %u }.\n", | |
1807 | info->entity, info->selector, info->size, | |
9eb30d2f LP |
1808 | (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0, |
1809 | (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0, | |
1810 | (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0); | |
52c58ad6 LP |
1811 | |
1812 | done: | |
1813 | kfree(data); | |
1814 | return ret; | |
1815 | } | |
1816 | ||
1817 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
1818 | const struct uvc_control_info *info); | |
1819 | ||
1820 | static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev, | |
1821 | struct uvc_control *ctrl) | |
1822 | { | |
1823 | struct uvc_control_info info; | |
1824 | int ret; | |
1825 | ||
1826 | if (ctrl->initialized) | |
1827 | return 0; | |
1828 | ||
1829 | ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info); | |
1830 | if (ret < 0) | |
1831 | return ret; | |
1832 | ||
1833 | ret = uvc_ctrl_add_info(dev, ctrl, &info); | |
1834 | if (ret < 0) | |
1835 | uvc_trace(UVC_TRACE_CONTROL, "Failed to initialize control " | |
1836 | "%pUl/%u on device %s entity %u\n", info.entity, | |
1837 | info.selector, dev->udev->devpath, ctrl->entity->id); | |
1838 | ||
1839 | return ret; | |
1840 | } | |
1841 | ||
8e113595 | 1842 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, |
fe78d187 | 1843 | struct uvc_xu_control_query *xqry) |
c0efd232 LP |
1844 | { |
1845 | struct uvc_entity *entity; | |
fe78d187 | 1846 | struct uvc_control *ctrl; |
c0efd232 | 1847 | unsigned int i, found = 0; |
2c6b222c LP |
1848 | u32 reqflags; |
1849 | u16 size; | |
1850 | u8 *data = NULL; | |
c0efd232 LP |
1851 | int ret; |
1852 | ||
1853 | /* Find the extension unit. */ | |
6241d8ca LP |
1854 | list_for_each_entry(entity, &chain->entities, chain) { |
1855 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | |
fe78d187 | 1856 | entity->id == xqry->unit) |
c0efd232 LP |
1857 | break; |
1858 | } | |
1859 | ||
fe78d187 | 1860 | if (entity->id != xqry->unit) { |
c0efd232 | 1861 | uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", |
fe78d187 MR |
1862 | xqry->unit); |
1863 | return -ENOENT; | |
c0efd232 LP |
1864 | } |
1865 | ||
52c58ad6 | 1866 | /* Find the control and perform delayed initialization if needed. */ |
c0efd232 LP |
1867 | for (i = 0; i < entity->ncontrols; ++i) { |
1868 | ctrl = &entity->controls[i]; | |
fe78d187 | 1869 | if (ctrl->index == xqry->selector - 1) { |
c0efd232 LP |
1870 | found = 1; |
1871 | break; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | if (!found) { | |
36bd883e | 1876 | uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", |
fe78d187 MR |
1877 | entity->extension.guidExtensionCode, xqry->selector); |
1878 | return -ENOENT; | |
c0efd232 LP |
1879 | } |
1880 | ||
27a61c13 LP |
1881 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
1882 | return -ERESTARTSYS; | |
1883 | ||
52c58ad6 | 1884 | ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl); |
27a61c13 LP |
1885 | if (ret < 0) { |
1886 | ret = -ENOENT; | |
1887 | goto done; | |
1888 | } | |
52c58ad6 | 1889 | |
fe78d187 MR |
1890 | /* Validate the required buffer size and flags for the request */ |
1891 | reqflags = 0; | |
1892 | size = ctrl->info.size; | |
1893 | ||
1894 | switch (xqry->query) { | |
1895 | case UVC_GET_CUR: | |
9eb30d2f | 1896 | reqflags = UVC_CTRL_FLAG_GET_CUR; |
fe78d187 MR |
1897 | break; |
1898 | case UVC_GET_MIN: | |
9eb30d2f | 1899 | reqflags = UVC_CTRL_FLAG_GET_MIN; |
fe78d187 MR |
1900 | break; |
1901 | case UVC_GET_MAX: | |
9eb30d2f | 1902 | reqflags = UVC_CTRL_FLAG_GET_MAX; |
fe78d187 MR |
1903 | break; |
1904 | case UVC_GET_DEF: | |
9eb30d2f | 1905 | reqflags = UVC_CTRL_FLAG_GET_DEF; |
fe78d187 MR |
1906 | break; |
1907 | case UVC_GET_RES: | |
9eb30d2f | 1908 | reqflags = UVC_CTRL_FLAG_GET_RES; |
fe78d187 MR |
1909 | break; |
1910 | case UVC_SET_CUR: | |
9eb30d2f | 1911 | reqflags = UVC_CTRL_FLAG_SET_CUR; |
fe78d187 MR |
1912 | break; |
1913 | case UVC_GET_LEN: | |
1914 | size = 2; | |
1915 | break; | |
1916 | case UVC_GET_INFO: | |
1917 | size = 1; | |
1918 | break; | |
1919 | default: | |
27a61c13 LP |
1920 | ret = -EINVAL; |
1921 | goto done; | |
1922 | } | |
c0efd232 | 1923 | |
fe78d187 MR |
1924 | if (size != xqry->size) { |
1925 | ret = -ENOBUFS; | |
27a61c13 LP |
1926 | goto done; |
1927 | } | |
c0efd232 | 1928 | |
fe78d187 MR |
1929 | if (reqflags && !(ctrl->info.flags & reqflags)) { |
1930 | ret = -EBADRQC; | |
1931 | goto done; | |
1932 | } | |
1933 | ||
1934 | data = kmalloc(size, GFP_KERNEL); | |
1935 | if (data == NULL) { | |
1936 | ret = -ENOMEM; | |
1937 | goto done; | |
1938 | } | |
c0efd232 | 1939 | |
fe78d187 MR |
1940 | if (xqry->query == UVC_SET_CUR && |
1941 | copy_from_user(data, xqry->data, size)) { | |
c0efd232 | 1942 | ret = -EFAULT; |
27a61c13 | 1943 | goto done; |
c0efd232 LP |
1944 | } |
1945 | ||
fe78d187 MR |
1946 | ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit, |
1947 | chain->dev->intfnum, xqry->selector, data, size); | |
c0efd232 | 1948 | if (ret < 0) |
27a61c13 | 1949 | goto done; |
c0efd232 | 1950 | |
fe78d187 MR |
1951 | if (xqry->query != UVC_SET_CUR && |
1952 | copy_to_user(xqry->data, data, size)) | |
c0efd232 | 1953 | ret = -EFAULT; |
27a61c13 | 1954 | done: |
fe78d187 | 1955 | kfree(data); |
8e113595 | 1956 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1957 | return ret; |
1958 | } | |
1959 | ||
1960 | /* -------------------------------------------------------------------------- | |
1961 | * Suspend/resume | |
1962 | */ | |
1963 | ||
1964 | /* | |
1965 | * Restore control values after resume, skipping controls that haven't been | |
1966 | * changed. | |
1967 | * | |
1968 | * TODO | |
1969 | * - Don't restore modified controls that are back to their default value. | |
1970 | * - Handle restore order (Auto-Exposure Mode should be restored before | |
1971 | * Exposure Time). | |
1972 | */ | |
17e1319f | 1973 | int uvc_ctrl_restore_values(struct uvc_device *dev) |
c0efd232 LP |
1974 | { |
1975 | struct uvc_control *ctrl; | |
1976 | struct uvc_entity *entity; | |
1977 | unsigned int i; | |
1978 | int ret; | |
1979 | ||
1980 | /* Walk the entities list and restore controls when possible. */ | |
1981 | list_for_each_entry(entity, &dev->entities, list) { | |
1982 | ||
1983 | for (i = 0; i < entity->ncontrols; ++i) { | |
1984 | ctrl = &entity->controls[i]; | |
1985 | ||
071c8bb8 | 1986 | if (!ctrl->initialized || !ctrl->modified || |
9eb30d2f | 1987 | (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) |
c0efd232 LP |
1988 | continue; |
1989 | ||
36bd883e | 1990 | printk(KERN_INFO "restoring control %pUl/%u/%u\n", |
071c8bb8 LP |
1991 | ctrl->info.entity, ctrl->info.index, |
1992 | ctrl->info.selector); | |
c0efd232 LP |
1993 | ctrl->dirty = 1; |
1994 | } | |
1995 | ||
1996 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | |
1997 | if (ret < 0) | |
1998 | return ret; | |
1999 | } | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | /* -------------------------------------------------------------------------- | |
2005 | * Control and mapping handling | |
2006 | */ | |
2007 | ||
ba2fa996 LP |
2008 | /* |
2009 | * Add control information to a given control. | |
2010 | */ | |
2011 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
2012 | const struct uvc_control_info *info) | |
2013 | { | |
2014 | int ret = 0; | |
c0efd232 | 2015 | |
8c0d44e2 | 2016 | ctrl->info = *info; |
071c8bb8 | 2017 | INIT_LIST_HEAD(&ctrl->info.mappings); |
ba2fa996 LP |
2018 | |
2019 | /* Allocate an array to save control values (cur, def, max, etc.) */ | |
071c8bb8 | 2020 | ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1, |
ba2fa996 LP |
2021 | GFP_KERNEL); |
2022 | if (ctrl->uvc_data == NULL) { | |
2023 | ret = -ENOMEM; | |
2024 | goto done; | |
c0efd232 | 2025 | } |
b30ece53 | 2026 | |
859086ae ET |
2027 | /* |
2028 | * Retrieve control flags from the device. Ignore errors and work with | |
2029 | * default flag values from the uvc_ctrl array when the device doesn't | |
2030 | * properly implement GET_INFO on standard controls. | |
2031 | */ | |
2032 | uvc_ctrl_get_flags(dev, ctrl, &ctrl->info); | |
2033 | ||
071c8bb8 LP |
2034 | ctrl->initialized = 1; |
2035 | ||
36bd883e | 2036 | uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " |
071c8bb8 | 2037 | "entity %u\n", ctrl->info.entity, ctrl->info.selector, |
ba2fa996 | 2038 | dev->udev->devpath, ctrl->entity->id); |
b30ece53 LP |
2039 | |
2040 | done: | |
071c8bb8 | 2041 | if (ret < 0) |
ba2fa996 | 2042 | kfree(ctrl->uvc_data); |
b30ece53 | 2043 | return ret; |
c0efd232 LP |
2044 | } |
2045 | ||
2046 | /* | |
ba2fa996 | 2047 | * Add a control mapping to a given control. |
c0efd232 | 2048 | */ |
ba2fa996 LP |
2049 | static int __uvc_ctrl_add_mapping(struct uvc_device *dev, |
2050 | struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) | |
c0efd232 | 2051 | { |
ba2fa996 LP |
2052 | struct uvc_control_mapping *map; |
2053 | unsigned int size; | |
c0efd232 | 2054 | |
ba2fa996 LP |
2055 | /* Most mappings come from static kernel data and need to be duplicated. |
2056 | * Mappings that come from userspace will be unnecessarily duplicated, | |
2057 | * this could be optimized. | |
c0efd232 | 2058 | */ |
ba2fa996 LP |
2059 | map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL); |
2060 | if (map == NULL) | |
2061 | return -ENOMEM; | |
c0efd232 | 2062 | |
b4012002 HG |
2063 | INIT_LIST_HEAD(&map->ev_subs); |
2064 | ||
ba2fa996 LP |
2065 | size = sizeof(*mapping->menu_info) * mapping->menu_count; |
2066 | map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); | |
2067 | if (map->menu_info == NULL) { | |
2068 | kfree(map); | |
2069 | return -ENOMEM; | |
c0efd232 LP |
2070 | } |
2071 | ||
ba2fa996 LP |
2072 | if (map->get == NULL) |
2073 | map->get = uvc_get_le_value; | |
2074 | if (map->set == NULL) | |
2075 | map->set = uvc_set_le_value; | |
c0efd232 | 2076 | |
071c8bb8 | 2077 | list_add_tail(&map->list, &ctrl->info.mappings); |
ba2fa996 LP |
2078 | uvc_trace(UVC_TRACE_CONTROL, |
2079 | "Adding mapping '%s' to control %pUl/%u.\n", | |
071c8bb8 | 2080 | map->name, ctrl->info.entity, ctrl->info.selector); |
ba2fa996 LP |
2081 | |
2082 | return 0; | |
c0efd232 LP |
2083 | } |
2084 | ||
ba2fa996 LP |
2085 | int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, |
2086 | const struct uvc_control_mapping *mapping) | |
c0efd232 | 2087 | { |
ba2fa996 | 2088 | struct uvc_device *dev = chain->dev; |
c0efd232 | 2089 | struct uvc_control_mapping *map; |
ba2fa996 LP |
2090 | struct uvc_entity *entity; |
2091 | struct uvc_control *ctrl; | |
2092 | int found = 0; | |
8fb91b33 | 2093 | int ret; |
9768352a | 2094 | |
c0efd232 | 2095 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
ba2fa996 | 2096 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control " |
52c58ad6 | 2097 | "id 0x%08x is invalid.\n", mapping->name, |
c0efd232 LP |
2098 | mapping->id); |
2099 | return -EINVAL; | |
2100 | } | |
2101 | ||
c0c5e71e SL |
2102 | /* Search for the matching (GUID/CS) control on the current chain */ |
2103 | list_for_each_entry(entity, &chain->entities, chain) { | |
ba2fa996 | 2104 | unsigned int i; |
c0efd232 | 2105 | |
52c58ad6 LP |
2106 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT || |
2107 | !uvc_entity_match_guid(entity, mapping->entity)) | |
ba2fa996 | 2108 | continue; |
c0efd232 | 2109 | |
ba2fa996 LP |
2110 | for (i = 0; i < entity->ncontrols; ++i) { |
2111 | ctrl = &entity->controls[i]; | |
52c58ad6 | 2112 | if (ctrl->index == mapping->selector - 1) { |
ba2fa996 LP |
2113 | found = 1; |
2114 | break; | |
c0efd232 LP |
2115 | } |
2116 | } | |
2117 | ||
ba2fa996 LP |
2118 | if (found) |
2119 | break; | |
2120 | } | |
2121 | if (!found) | |
2122 | return -ENOENT; | |
c0efd232 | 2123 | |
ba2fa996 LP |
2124 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
2125 | return -ERESTARTSYS; | |
2126 | ||
52c58ad6 LP |
2127 | /* Perform delayed initialization of XU controls */ |
2128 | ret = uvc_ctrl_init_xu_ctrl(dev, ctrl); | |
2129 | if (ret < 0) { | |
2130 | ret = -ENOENT; | |
2131 | goto done; | |
2132 | } | |
2133 | ||
7e09f7d5 GR |
2134 | /* Validate the user-provided bit-size and offset */ |
2135 | if (mapping->size > 32 || | |
2136 | mapping->offset + mapping->size > ctrl->info.size * 8) { | |
2137 | ret = -EINVAL; | |
2138 | goto done; | |
2139 | } | |
2140 | ||
071c8bb8 | 2141 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
ba2fa996 LP |
2142 | if (mapping->id == map->id) { |
2143 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', " | |
2144 | "control id 0x%08x already exists.\n", | |
2145 | mapping->name, mapping->id); | |
2146 | ret = -EEXIST; | |
2147 | goto done; | |
2148 | } | |
c0efd232 | 2149 | } |
ba2fa996 | 2150 | |
8fb91b33 MR |
2151 | /* Prevent excess memory consumption */ |
2152 | if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) { | |
2153 | atomic_dec(&dev->nmappings); | |
2154 | uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum " | |
2155 | "mappings count (%u) exceeded.\n", mapping->name, | |
2156 | UVC_MAX_CONTROL_MAPPINGS); | |
2157 | ret = -ENOMEM; | |
2158 | goto done; | |
2159 | } | |
2160 | ||
ba2fa996 | 2161 | ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
8fb91b33 MR |
2162 | if (ret < 0) |
2163 | atomic_dec(&dev->nmappings); | |
2164 | ||
ba2fa996 LP |
2165 | done: |
2166 | mutex_unlock(&chain->ctrl_mutex); | |
c0efd232 LP |
2167 | return ret; |
2168 | } | |
2169 | ||
2bdd29cf | 2170 | /* |
d732c44c LP |
2171 | * Prune an entity of its bogus controls using a blacklist. Bogus controls |
2172 | * are currently the ones that crash the camera or unconditionally return an | |
2173 | * error when queried. | |
2bdd29cf | 2174 | */ |
ba2fa996 LP |
2175 | static void uvc_ctrl_prune_entity(struct uvc_device *dev, |
2176 | struct uvc_entity *entity) | |
2bdd29cf | 2177 | { |
fa34168b | 2178 | struct uvc_ctrl_blacklist { |
d732c44c LP |
2179 | struct usb_device_id id; |
2180 | u8 index; | |
fa34168b LP |
2181 | }; |
2182 | ||
2183 | static const struct uvc_ctrl_blacklist processing_blacklist[] = { | |
9405e3cb | 2184 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ |
d732c44c LP |
2185 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ |
2186 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | |
2bdd29cf | 2187 | }; |
fa34168b LP |
2188 | static const struct uvc_ctrl_blacklist camera_blacklist[] = { |
2189 | { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */ | |
2190 | }; | |
2bdd29cf | 2191 | |
fa34168b | 2192 | const struct uvc_ctrl_blacklist *blacklist; |
2bdd29cf | 2193 | unsigned int size; |
fa34168b | 2194 | unsigned int count; |
2bdd29cf | 2195 | unsigned int i; |
fa34168b | 2196 | u8 *controls; |
2bdd29cf | 2197 | |
fa34168b LP |
2198 | switch (UVC_ENTITY_TYPE(entity)) { |
2199 | case UVC_VC_PROCESSING_UNIT: | |
2200 | blacklist = processing_blacklist; | |
2201 | count = ARRAY_SIZE(processing_blacklist); | |
2202 | controls = entity->processing.bmControls; | |
2203 | size = entity->processing.bControlSize; | |
2204 | break; | |
2205 | ||
2206 | case UVC_ITT_CAMERA: | |
2207 | blacklist = camera_blacklist; | |
2208 | count = ARRAY_SIZE(camera_blacklist); | |
2209 | controls = entity->camera.bmControls; | |
2210 | size = entity->camera.bControlSize; | |
2211 | break; | |
2bdd29cf | 2212 | |
fa34168b LP |
2213 | default: |
2214 | return; | |
2215 | } | |
2bdd29cf | 2216 | |
fa34168b | 2217 | for (i = 0; i < count; ++i) { |
385097e0 | 2218 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) |
2bdd29cf LP |
2219 | continue; |
2220 | ||
d732c44c LP |
2221 | if (blacklist[i].index >= 8 * size || |
2222 | !uvc_test_bit(controls, blacklist[i].index)) | |
2bdd29cf LP |
2223 | continue; |
2224 | ||
d732c44c LP |
2225 | uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, " |
2226 | "removing it.\n", entity->id, blacklist[i].index); | |
2bdd29cf | 2227 | |
d732c44c | 2228 | uvc_clear_bit(controls, blacklist[i].index); |
2bdd29cf LP |
2229 | } |
2230 | } | |
2231 | ||
ba2fa996 LP |
2232 | /* |
2233 | * Add control information and hardcoded stock control mappings to the given | |
2234 | * device. | |
2235 | */ | |
2236 | static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) | |
2237 | { | |
2238 | const struct uvc_control_info *info = uvc_ctrls; | |
2239 | const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls); | |
2240 | const struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | |
2241 | const struct uvc_control_mapping *mend = | |
2242 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | |
2243 | ||
52c58ad6 LP |
2244 | /* XU controls initialization requires querying the device for control |
2245 | * information. As some buggy UVC devices will crash when queried | |
2246 | * repeatedly in a tight loop, delay XU controls initialization until | |
2247 | * first use. | |
2248 | */ | |
2249 | if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT) | |
ba2fa996 | 2250 | return; |
ba2fa996 LP |
2251 | |
2252 | for (; info < iend; ++info) { | |
2253 | if (uvc_entity_match_guid(ctrl->entity, info->entity) && | |
2254 | ctrl->index == info->index) { | |
2255 | uvc_ctrl_add_info(dev, ctrl, info); | |
2256 | break; | |
2257 | } | |
2258 | } | |
2259 | ||
071c8bb8 | 2260 | if (!ctrl->initialized) |
ba2fa996 LP |
2261 | return; |
2262 | ||
2263 | for (; mapping < mend; ++mapping) { | |
2264 | if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && | |
071c8bb8 | 2265 | ctrl->info.selector == mapping->selector) |
ba2fa996 LP |
2266 | __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
2267 | } | |
2268 | } | |
2269 | ||
c0efd232 LP |
2270 | /* |
2271 | * Initialize device controls. | |
2272 | */ | |
2273 | int uvc_ctrl_init_device(struct uvc_device *dev) | |
2274 | { | |
c0efd232 LP |
2275 | struct uvc_entity *entity; |
2276 | unsigned int i; | |
2277 | ||
e5225c82 GL |
2278 | INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work); |
2279 | ||
c0efd232 LP |
2280 | /* Walk the entities list and instantiate controls */ |
2281 | list_for_each_entry(entity, &dev->entities, list) { | |
ba2fa996 | 2282 | struct uvc_control *ctrl; |
9a601396 | 2283 | unsigned int bControlSize = 0, ncontrols; |
2c6b222c | 2284 | u8 *bmControls = NULL; |
c0efd232 | 2285 | |
b482d923 | 2286 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
2287 | bmControls = entity->extension.bmControls; |
2288 | bControlSize = entity->extension.bControlSize; | |
b482d923 | 2289 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { |
c0efd232 LP |
2290 | bmControls = entity->processing.bmControls; |
2291 | bControlSize = entity->processing.bControlSize; | |
b482d923 | 2292 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { |
c0efd232 LP |
2293 | bmControls = entity->camera.bmControls; |
2294 | bControlSize = entity->camera.bControlSize; | |
2295 | } | |
2296 | ||
ba2fa996 | 2297 | /* Remove bogus/blacklisted controls */ |
d732c44c | 2298 | uvc_ctrl_prune_entity(dev, entity); |
2bdd29cf | 2299 | |
ba2fa996 | 2300 | /* Count supported controls and allocate the controls array */ |
9a601396 | 2301 | ncontrols = memweight(bmControls, bControlSize); |
c0efd232 LP |
2302 | if (ncontrols == 0) |
2303 | continue; | |
2304 | ||
d0d97488 | 2305 | entity->controls = kcalloc(ncontrols, sizeof(*ctrl), |
ba2fa996 | 2306 | GFP_KERNEL); |
c0efd232 LP |
2307 | if (entity->controls == NULL) |
2308 | return -ENOMEM; | |
c0efd232 LP |
2309 | entity->ncontrols = ncontrols; |
2310 | ||
ba2fa996 | 2311 | /* Initialize all supported controls */ |
c0efd232 LP |
2312 | ctrl = entity->controls; |
2313 | for (i = 0; i < bControlSize * 8; ++i) { | |
2bdd29cf | 2314 | if (uvc_test_bit(bmControls, i) == 0) |
c0efd232 LP |
2315 | continue; |
2316 | ||
2317 | ctrl->entity = entity; | |
2318 | ctrl->index = i; | |
ba2fa996 LP |
2319 | |
2320 | uvc_ctrl_init_ctrl(dev, ctrl); | |
c0efd232 LP |
2321 | ctrl++; |
2322 | } | |
2323 | } | |
2324 | ||
c0efd232 LP |
2325 | return 0; |
2326 | } | |
2327 | ||
2328 | /* | |
2329 | * Cleanup device controls. | |
2330 | */ | |
ba2fa996 LP |
2331 | static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, |
2332 | struct uvc_control *ctrl) | |
c0efd232 | 2333 | { |
ba2fa996 | 2334 | struct uvc_control_mapping *mapping, *nm; |
c0efd232 | 2335 | |
071c8bb8 | 2336 | list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { |
ba2fa996 LP |
2337 | list_del(&mapping->list); |
2338 | kfree(mapping->menu_info); | |
2339 | kfree(mapping); | |
c0efd232 LP |
2340 | } |
2341 | } | |
2342 | ||
ba2fa996 | 2343 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) |
561474c2 | 2344 | { |
ba2fa996 LP |
2345 | struct uvc_entity *entity; |
2346 | unsigned int i; | |
561474c2 | 2347 | |
e5225c82 GL |
2348 | cancel_work_sync(&dev->async_ctrl.work); |
2349 | ||
ba2fa996 LP |
2350 | /* Free controls and control mappings for all entities. */ |
2351 | list_for_each_entry(entity, &dev->entities, list) { | |
2352 | for (i = 0; i < entity->ncontrols; ++i) { | |
2353 | struct uvc_control *ctrl = &entity->controls[i]; | |
2354 | ||
071c8bb8 | 2355 | if (!ctrl->initialized) |
ba2fa996 | 2356 | continue; |
561474c2 | 2357 | |
ba2fa996 LP |
2358 | uvc_ctrl_cleanup_mappings(dev, ctrl); |
2359 | kfree(ctrl->uvc_data); | |
561474c2 LP |
2360 | } |
2361 | ||
ba2fa996 | 2362 | kfree(entity->controls); |
561474c2 LP |
2363 | } |
2364 | } |