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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 | 349 | }, |
6f6a87eb RR |
350 | { |
351 | .entity = UVC_GUID_EXT_GPIO_CONTROLLER, | |
352 | .selector = UVC_CT_PRIVACY_CONTROL, | |
353 | .index = 0, | |
354 | .size = 1, | |
355 | .flags = UVC_CTRL_FLAG_GET_CUR | |
356 | | UVC_CTRL_FLAG_AUTO_UPDATE, | |
357 | }, | |
c0efd232 LP |
358 | }; |
359 | ||
52a4eb31 | 360 | static const struct uvc_menu_info power_line_frequency_controls[] = { |
c0efd232 LP |
361 | { 0, "Disabled" }, |
362 | { 1, "50 Hz" }, | |
363 | { 2, "60 Hz" }, | |
364 | }; | |
365 | ||
52a4eb31 | 366 | static const struct uvc_menu_info exposure_auto_controls[] = { |
c0efd232 | 367 | { 2, "Auto Mode" }, |
90ac5ea3 | 368 | { 1, "Manual Mode" }, |
c0efd232 LP |
369 | { 4, "Shutter Priority Mode" }, |
370 | { 8, "Aperture Priority Mode" }, | |
371 | }; | |
372 | ||
2c6b222c LP |
373 | static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, |
374 | u8 query, const u8 *data) | |
9768352a | 375 | { |
2c6b222c | 376 | s8 zoom = (s8)data[0]; |
9768352a LP |
377 | |
378 | switch (query) { | |
b482d923 | 379 | case UVC_GET_CUR: |
9768352a LP |
380 | return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); |
381 | ||
b482d923 LP |
382 | case UVC_GET_MIN: |
383 | case UVC_GET_MAX: | |
384 | case UVC_GET_RES: | |
385 | case UVC_GET_DEF: | |
9768352a LP |
386 | default: |
387 | return data[2]; | |
388 | } | |
389 | } | |
390 | ||
391 | static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, | |
2c6b222c | 392 | s32 value, u8 *data) |
9768352a LP |
393 | { |
394 | data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
2e896133 | 395 | data[2] = min((int)abs(value), 0xff); |
9768352a LP |
396 | } |
397 | ||
2c6b222c LP |
398 | static s32 uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping, |
399 | u8 query, const u8 *data) | |
3ea37523 VP |
400 | { |
401 | unsigned int first = mapping->offset / 8; | |
2c6b222c | 402 | s8 rel = (s8)data[first]; |
3ea37523 VP |
403 | |
404 | switch (query) { | |
405 | case UVC_GET_CUR: | |
406 | return (rel == 0) ? 0 : (rel > 0 ? data[first+1] | |
407 | : -data[first+1]); | |
408 | case UVC_GET_MIN: | |
409 | return -data[first+1]; | |
410 | case UVC_GET_MAX: | |
411 | case UVC_GET_RES: | |
412 | case UVC_GET_DEF: | |
413 | default: | |
414 | return data[first+1]; | |
415 | } | |
416 | } | |
417 | ||
418 | static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping, | |
2c6b222c | 419 | s32 value, u8 *data) |
3ea37523 VP |
420 | { |
421 | unsigned int first = mapping->offset / 8; | |
422 | ||
423 | data[first] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; | |
424 | data[first+1] = min_t(int, abs(value), 0xff); | |
425 | } | |
426 | ||
8643d237 | 427 | static const struct uvc_control_mapping uvc_ctrl_mappings[] = { |
c0efd232 LP |
428 | { |
429 | .id = V4L2_CID_BRIGHTNESS, | |
430 | .name = "Brightness", | |
431 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 432 | .selector = UVC_PU_BRIGHTNESS_CONTROL, |
c0efd232 LP |
433 | .size = 16, |
434 | .offset = 0, | |
435 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
436 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
437 | }, | |
438 | { | |
439 | .id = V4L2_CID_CONTRAST, | |
440 | .name = "Contrast", | |
441 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 442 | .selector = UVC_PU_CONTRAST_CONTROL, |
c0efd232 LP |
443 | .size = 16, |
444 | .offset = 0, | |
445 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
446 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
447 | }, | |
448 | { | |
449 | .id = V4L2_CID_HUE, | |
450 | .name = "Hue", | |
451 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 452 | .selector = UVC_PU_HUE_CONTROL, |
c0efd232 LP |
453 | .size = 16, |
454 | .offset = 0, | |
455 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
456 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
457 | .master_id = V4L2_CID_HUE_AUTO, |
458 | .master_manual = 0, | |
c0efd232 LP |
459 | }, |
460 | { | |
461 | .id = V4L2_CID_SATURATION, | |
462 | .name = "Saturation", | |
463 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 464 | .selector = UVC_PU_SATURATION_CONTROL, |
c0efd232 LP |
465 | .size = 16, |
466 | .offset = 0, | |
467 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
468 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
469 | }, | |
470 | { | |
471 | .id = V4L2_CID_SHARPNESS, | |
472 | .name = "Sharpness", | |
473 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 474 | .selector = UVC_PU_SHARPNESS_CONTROL, |
c0efd232 LP |
475 | .size = 16, |
476 | .offset = 0, | |
477 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
478 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
479 | }, | |
480 | { | |
481 | .id = V4L2_CID_GAMMA, | |
482 | .name = "Gamma", | |
483 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 484 | .selector = UVC_PU_GAMMA_CONTROL, |
c0efd232 LP |
485 | .size = 16, |
486 | .offset = 0, | |
487 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
488 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
489 | }, | |
490 | { | |
491 | .id = V4L2_CID_BACKLIGHT_COMPENSATION, | |
492 | .name = "Backlight Compensation", | |
493 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 494 | .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, |
c0efd232 LP |
495 | .size = 16, |
496 | .offset = 0, | |
497 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
498 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
499 | }, | |
500 | { | |
501 | .id = V4L2_CID_GAIN, | |
502 | .name = "Gain", | |
503 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 504 | .selector = UVC_PU_GAIN_CONTROL, |
c0efd232 LP |
505 | .size = 16, |
506 | .offset = 0, | |
507 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
508 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
509 | }, | |
510 | { | |
511 | .id = V4L2_CID_POWER_LINE_FREQUENCY, | |
512 | .name = "Power Line Frequency", | |
513 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 514 | .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, |
c0efd232 LP |
515 | .size = 2, |
516 | .offset = 0, | |
517 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
518 | .data_type = UVC_CTRL_DATA_TYPE_ENUM, | |
519 | .menu_info = power_line_frequency_controls, | |
520 | .menu_count = ARRAY_SIZE(power_line_frequency_controls), | |
521 | }, | |
522 | { | |
523 | .id = V4L2_CID_HUE_AUTO, | |
524 | .name = "Hue, Auto", | |
525 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 526 | .selector = UVC_PU_HUE_AUTO_CONTROL, |
c0efd232 LP |
527 | .size = 1, |
528 | .offset = 0, | |
529 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
530 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 531 | .slave_ids = { V4L2_CID_HUE, }, |
c0efd232 LP |
532 | }, |
533 | { | |
534 | .id = V4L2_CID_EXPOSURE_AUTO, | |
535 | .name = "Exposure, Auto", | |
536 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 537 | .selector = UVC_CT_AE_MODE_CONTROL, |
c0efd232 LP |
538 | .size = 4, |
539 | .offset = 0, | |
540 | .v4l2_type = V4L2_CTRL_TYPE_MENU, | |
541 | .data_type = UVC_CTRL_DATA_TYPE_BITMASK, | |
542 | .menu_info = exposure_auto_controls, | |
543 | .menu_count = ARRAY_SIZE(exposure_auto_controls), | |
55afeb8a | 544 | .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, |
c0efd232 LP |
545 | }, |
546 | { | |
547 | .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, | |
548 | .name = "Exposure, Auto Priority", | |
549 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 550 | .selector = UVC_CT_AE_PRIORITY_CONTROL, |
c0efd232 LP |
551 | .size = 1, |
552 | .offset = 0, | |
553 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
554 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
555 | }, | |
556 | { | |
557 | .id = V4L2_CID_EXPOSURE_ABSOLUTE, | |
558 | .name = "Exposure (Absolute)", | |
559 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 560 | .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
c0efd232 LP |
561 | .size = 32, |
562 | .offset = 0, | |
563 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
564 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
565 | .master_id = V4L2_CID_EXPOSURE_AUTO, |
566 | .master_manual = V4L2_EXPOSURE_MANUAL, | |
c0efd232 LP |
567 | }, |
568 | { | |
569 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
570 | .name = "White Balance Temperature, Auto", | |
571 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 572 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
c0efd232 LP |
573 | .size = 1, |
574 | .offset = 0, | |
575 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
576 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 577 | .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, |
c0efd232 LP |
578 | }, |
579 | { | |
580 | .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, | |
581 | .name = "White Balance Temperature", | |
582 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 583 | .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
c0efd232 LP |
584 | .size = 16, |
585 | .offset = 0, | |
586 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
587 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
588 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
589 | .master_manual = 0, | |
c0efd232 LP |
590 | }, |
591 | { | |
592 | .id = V4L2_CID_AUTO_WHITE_BALANCE, | |
593 | .name = "White Balance Component, Auto", | |
594 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 595 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
c0efd232 LP |
596 | .size = 1, |
597 | .offset = 0, | |
598 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
599 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a HG |
600 | .slave_ids = { V4L2_CID_BLUE_BALANCE, |
601 | V4L2_CID_RED_BALANCE }, | |
c0efd232 LP |
602 | }, |
603 | { | |
604 | .id = V4L2_CID_BLUE_BALANCE, | |
605 | .name = "White Balance Blue Component", | |
606 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 607 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
608 | .size = 16, |
609 | .offset = 0, | |
610 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
611 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
612 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
613 | .master_manual = 0, | |
c0efd232 LP |
614 | }, |
615 | { | |
616 | .id = V4L2_CID_RED_BALANCE, | |
617 | .name = "White Balance Red Component", | |
618 | .entity = UVC_GUID_UVC_PROCESSING, | |
b482d923 | 619 | .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, |
c0efd232 LP |
620 | .size = 16, |
621 | .offset = 16, | |
622 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
623 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
55afeb8a HG |
624 | .master_id = V4L2_CID_AUTO_WHITE_BALANCE, |
625 | .master_manual = 0, | |
c0efd232 LP |
626 | }, |
627 | { | |
628 | .id = V4L2_CID_FOCUS_ABSOLUTE, | |
629 | .name = "Focus (absolute)", | |
630 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 631 | .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, |
c0efd232 LP |
632 | .size = 16, |
633 | .offset = 0, | |
634 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
635 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
55afeb8a HG |
636 | .master_id = V4L2_CID_FOCUS_AUTO, |
637 | .master_manual = 0, | |
c0efd232 LP |
638 | }, |
639 | { | |
640 | .id = V4L2_CID_FOCUS_AUTO, | |
641 | .name = "Focus, Auto", | |
642 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 643 | .selector = UVC_CT_FOCUS_AUTO_CONTROL, |
c0efd232 LP |
644 | .size = 1, |
645 | .offset = 0, | |
646 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
647 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
55afeb8a | 648 | .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, |
c0efd232 | 649 | }, |
35a00c41 LP |
650 | { |
651 | .id = V4L2_CID_IRIS_ABSOLUTE, | |
652 | .name = "Iris, Absolute", | |
653 | .entity = UVC_GUID_UVC_CAMERA, | |
654 | .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, | |
655 | .size = 16, | |
656 | .offset = 0, | |
657 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
658 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
659 | }, | |
660 | { | |
661 | .id = V4L2_CID_IRIS_RELATIVE, | |
662 | .name = "Iris, Relative", | |
663 | .entity = UVC_GUID_UVC_CAMERA, | |
664 | .selector = UVC_CT_IRIS_RELATIVE_CONTROL, | |
665 | .size = 8, | |
666 | .offset = 0, | |
667 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
668 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
669 | }, | |
9768352a LP |
670 | { |
671 | .id = V4L2_CID_ZOOM_ABSOLUTE, | |
672 | .name = "Zoom, Absolute", | |
673 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 674 | .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, |
9768352a LP |
675 | .size = 16, |
676 | .offset = 0, | |
677 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
678 | .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, | |
679 | }, | |
680 | { | |
681 | .id = V4L2_CID_ZOOM_CONTINUOUS, | |
682 | .name = "Zoom, Continuous", | |
683 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 684 | .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, |
9768352a LP |
685 | .size = 0, |
686 | .offset = 0, | |
687 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
688 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
689 | .get = uvc_ctrl_get_zoom, | |
690 | .set = uvc_ctrl_set_zoom, | |
691 | }, | |
e56be916 MR |
692 | { |
693 | .id = V4L2_CID_PAN_ABSOLUTE, | |
694 | .name = "Pan (Absolute)", | |
695 | .entity = UVC_GUID_UVC_CAMERA, | |
696 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
697 | .size = 32, | |
698 | .offset = 0, | |
699 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
8ca5d2d8 | 700 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
e56be916 MR |
701 | }, |
702 | { | |
703 | .id = V4L2_CID_TILT_ABSOLUTE, | |
704 | .name = "Tilt (Absolute)", | |
705 | .entity = UVC_GUID_UVC_CAMERA, | |
706 | .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, | |
707 | .size = 32, | |
708 | .offset = 32, | |
709 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
8ca5d2d8 | 710 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
e56be916 | 711 | }, |
3ea37523 VP |
712 | { |
713 | .id = V4L2_CID_PAN_SPEED, | |
714 | .name = "Pan (Speed)", | |
715 | .entity = UVC_GUID_UVC_CAMERA, | |
716 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, | |
717 | .size = 16, | |
718 | .offset = 0, | |
719 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
720 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
721 | .get = uvc_ctrl_get_rel_speed, | |
722 | .set = uvc_ctrl_set_rel_speed, | |
723 | }, | |
724 | { | |
725 | .id = V4L2_CID_TILT_SPEED, | |
726 | .name = "Tilt (Speed)", | |
727 | .entity = UVC_GUID_UVC_CAMERA, | |
728 | .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, | |
729 | .size = 16, | |
730 | .offset = 16, | |
731 | .v4l2_type = V4L2_CTRL_TYPE_INTEGER, | |
732 | .data_type = UVC_CTRL_DATA_TYPE_SIGNED, | |
733 | .get = uvc_ctrl_get_rel_speed, | |
734 | .set = uvc_ctrl_set_rel_speed, | |
735 | }, | |
6df126f8 LP |
736 | { |
737 | .id = V4L2_CID_PRIVACY, | |
738 | .name = "Privacy", | |
739 | .entity = UVC_GUID_UVC_CAMERA, | |
b482d923 | 740 | .selector = UVC_CT_PRIVACY_CONTROL, |
6df126f8 LP |
741 | .size = 1, |
742 | .offset = 0, | |
743 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
744 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
745 | }, | |
6f6a87eb RR |
746 | { |
747 | .id = V4L2_CID_PRIVACY, | |
748 | .name = "Privacy", | |
749 | .entity = UVC_GUID_EXT_GPIO_CONTROLLER, | |
750 | .selector = UVC_CT_PRIVACY_CONTROL, | |
751 | .size = 1, | |
752 | .offset = 0, | |
753 | .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, | |
754 | .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, | |
755 | }, | |
c0efd232 LP |
756 | }; |
757 | ||
758 | /* ------------------------------------------------------------------------ | |
759 | * Utility functions | |
760 | */ | |
761 | ||
2c6b222c | 762 | static inline u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) |
c0efd232 | 763 | { |
071c8bb8 | 764 | return ctrl->uvc_data + id * ctrl->info.size; |
c0efd232 LP |
765 | } |
766 | ||
2c6b222c | 767 | static inline int uvc_test_bit(const u8 *data, int bit) |
c0efd232 LP |
768 | { |
769 | return (data[bit >> 3] >> (bit & 7)) & 1; | |
770 | } | |
771 | ||
2c6b222c | 772 | static inline void uvc_clear_bit(u8 *data, int bit) |
2bdd29cf LP |
773 | { |
774 | data[bit >> 3] &= ~(1 << (bit & 7)); | |
775 | } | |
776 | ||
c0efd232 LP |
777 | /* Extract the bit string specified by mapping->offset and mapping->size |
778 | * from the little-endian data stored at 'data' and return the result as | |
779 | * a signed 32bit integer. Sign extension will be performed if the mapping | |
780 | * references a signed data type. | |
781 | */ | |
2c6b222c LP |
782 | static s32 uvc_get_le_value(struct uvc_control_mapping *mapping, |
783 | u8 query, const u8 *data) | |
c0efd232 LP |
784 | { |
785 | int bits = mapping->size; | |
786 | int offset = mapping->offset; | |
2c6b222c LP |
787 | s32 value = 0; |
788 | u8 mask; | |
c0efd232 LP |
789 | |
790 | data += offset / 8; | |
791 | offset &= 7; | |
792 | mask = ((1LL << bits) - 1) << offset; | |
793 | ||
171994e4 | 794 | while (1) { |
2c6b222c | 795 | u8 byte = *data & mask; |
c0efd232 LP |
796 | value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); |
797 | bits -= 8 - (offset > 0 ? offset : 0); | |
171994e4 LP |
798 | if (bits <= 0) |
799 | break; | |
800 | ||
c0efd232 LP |
801 | offset -= 8; |
802 | mask = (1 << bits) - 1; | |
171994e4 | 803 | data++; |
c0efd232 LP |
804 | } |
805 | ||
2c2d264b | 806 | /* Sign-extend the value if needed. */ |
c0efd232 LP |
807 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
808 | value |= -(value & (1 << (mapping->size - 1))); | |
809 | ||
810 | return value; | |
811 | } | |
812 | ||
813 | /* Set the bit string specified by mapping->offset and mapping->size | |
814 | * in the little-endian data stored at 'data' to the value 'value'. | |
815 | */ | |
9768352a | 816 | static void uvc_set_le_value(struct uvc_control_mapping *mapping, |
2c6b222c | 817 | s32 value, u8 *data) |
c0efd232 LP |
818 | { |
819 | int bits = mapping->size; | |
820 | int offset = mapping->offset; | |
2c6b222c | 821 | u8 mask; |
c0efd232 | 822 | |
3653639e HG |
823 | /* According to the v4l2 spec, writing any value to a button control |
824 | * should result in the action belonging to the button control being | |
825 | * triggered. UVC devices however want to see a 1 written -> override | |
826 | * value. | |
827 | */ | |
828 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) | |
829 | value = -1; | |
830 | ||
c0efd232 LP |
831 | data += offset / 8; |
832 | offset &= 7; | |
833 | ||
834 | for (; bits > 0; data++) { | |
835 | mask = ((1LL << bits) - 1) << offset; | |
836 | *data = (*data & ~mask) | ((value << offset) & mask); | |
837 | value >>= offset ? offset : 8; | |
838 | bits -= 8 - offset; | |
839 | offset = 0; | |
840 | } | |
841 | } | |
842 | ||
843 | /* ------------------------------------------------------------------------ | |
844 | * Terminal and unit management | |
845 | */ | |
846 | ||
f9d81df9 | 847 | static int uvc_entity_match_guid(const struct uvc_entity *entity, |
351509c6 | 848 | const u8 guid[16]) |
c0efd232 | 849 | { |
351509c6 | 850 | return memcmp(entity->guid, guid, sizeof(entity->guid)) == 0; |
c0efd232 LP |
851 | } |
852 | ||
853 | /* ------------------------------------------------------------------------ | |
854 | * UVC Controls | |
855 | */ | |
856 | ||
2c6b222c | 857 | static void __uvc_find_control(struct uvc_entity *entity, u32 v4l2_id, |
c0efd232 LP |
858 | struct uvc_control_mapping **mapping, struct uvc_control **control, |
859 | int next) | |
860 | { | |
861 | struct uvc_control *ctrl; | |
862 | struct uvc_control_mapping *map; | |
863 | unsigned int i; | |
864 | ||
865 | if (entity == NULL) | |
866 | return; | |
867 | ||
868 | for (i = 0; i < entity->ncontrols; ++i) { | |
869 | ctrl = &entity->controls[i]; | |
071c8bb8 | 870 | if (!ctrl->initialized) |
c0efd232 LP |
871 | continue; |
872 | ||
071c8bb8 | 873 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
c0efd232 LP |
874 | if ((map->id == v4l2_id) && !next) { |
875 | *control = ctrl; | |
876 | *mapping = map; | |
877 | return; | |
878 | } | |
879 | ||
880 | if ((*mapping == NULL || (*mapping)->id > map->id) && | |
881 | (map->id > v4l2_id) && next) { | |
882 | *control = ctrl; | |
883 | *mapping = map; | |
884 | } | |
885 | } | |
886 | } | |
887 | } | |
888 | ||
23d9f3ef | 889 | static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, |
2c6b222c | 890 | u32 v4l2_id, struct uvc_control_mapping **mapping) |
c0efd232 LP |
891 | { |
892 | struct uvc_control *ctrl = NULL; | |
893 | struct uvc_entity *entity; | |
894 | int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; | |
895 | ||
896 | *mapping = NULL; | |
897 | ||
898 | /* Mask the query flags. */ | |
899 | v4l2_id &= V4L2_CTRL_ID_MASK; | |
900 | ||
901 | /* Find the control. */ | |
6241d8ca | 902 | list_for_each_entry(entity, &chain->entities, chain) { |
c0efd232 LP |
903 | __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
904 | if (ctrl && !next) | |
905 | return ctrl; | |
906 | } | |
907 | ||
908 | if (ctrl == NULL && !next) | |
9e56380a JP |
909 | uvc_dbg(chain->dev, CONTROL, "Control 0x%08x not found\n", |
910 | v4l2_id); | |
c0efd232 LP |
911 | |
912 | return ctrl; | |
913 | } | |
914 | ||
59529081 LP |
915 | static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, |
916 | struct uvc_control *ctrl) | |
917 | { | |
918 | int ret; | |
919 | ||
9eb30d2f | 920 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 | 921 | ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, |
071c8bb8 | 922 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 923 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), |
071c8bb8 | 924 | ctrl->info.size); |
59529081 LP |
925 | if (ret < 0) |
926 | return ret; | |
927 | } | |
928 | ||
9eb30d2f | 929 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { |
59529081 | 930 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, |
071c8bb8 | 931 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 932 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), |
071c8bb8 | 933 | ctrl->info.size); |
59529081 LP |
934 | if (ret < 0) |
935 | return ret; | |
936 | } | |
9eb30d2f | 937 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { |
59529081 | 938 | ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, |
071c8bb8 | 939 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 940 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), |
071c8bb8 | 941 | ctrl->info.size); |
59529081 LP |
942 | if (ret < 0) |
943 | return ret; | |
944 | } | |
9eb30d2f | 945 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { |
59529081 | 946 | ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, |
071c8bb8 | 947 | chain->dev->intfnum, ctrl->info.selector, |
59529081 | 948 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), |
071c8bb8 | 949 | ctrl->info.size); |
c4d99f89 LP |
950 | if (ret < 0) { |
951 | if (UVC_ENTITY_TYPE(ctrl->entity) != | |
952 | UVC_VC_EXTENSION_UNIT) | |
953 | return ret; | |
954 | ||
955 | /* GET_RES is mandatory for XU controls, but some | |
956 | * cameras still choke on it. Ignore errors and set the | |
957 | * resolution value to zero. | |
958 | */ | |
959 | uvc_warn_once(chain->dev, UVC_WARN_XU_GET_RES, | |
960 | "UVC non compliance - GET_RES failed on " | |
961 | "an XU control. Enabling workaround.\n"); | |
962 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), 0, | |
963 | ctrl->info.size); | |
964 | } | |
59529081 LP |
965 | } |
966 | ||
967 | ctrl->cached = 1; | |
968 | return 0; | |
969 | } | |
970 | ||
e5225c82 GL |
971 | static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, |
972 | const u8 *data) | |
973 | { | |
974 | s32 value = mapping->get(mapping, UVC_GET_CUR, data); | |
975 | ||
976 | if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { | |
52a4eb31 | 977 | const struct uvc_menu_info *menu = mapping->menu_info; |
e5225c82 GL |
978 | unsigned int i; |
979 | ||
980 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
981 | if (menu->value == value) { | |
982 | value = i; | |
983 | break; | |
984 | } | |
985 | } | |
986 | } | |
987 | ||
988 | return value; | |
989 | } | |
990 | ||
cb74d482 HG |
991 | static int __uvc_ctrl_get(struct uvc_video_chain *chain, |
992 | struct uvc_control *ctrl, struct uvc_control_mapping *mapping, | |
993 | s32 *value) | |
994 | { | |
cb74d482 HG |
995 | int ret; |
996 | ||
997 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) | |
30ecb936 | 998 | return -EACCES; |
cb74d482 HG |
999 | |
1000 | if (!ctrl->loaded) { | |
65900c58 RR |
1001 | if (ctrl->entity->get_cur) { |
1002 | ret = ctrl->entity->get_cur(chain->dev, | |
1003 | ctrl->entity, | |
1004 | ctrl->info.selector, | |
cb74d482 HG |
1005 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
1006 | ctrl->info.size); | |
65900c58 RR |
1007 | } else { |
1008 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, | |
1009 | ctrl->entity->id, | |
1010 | chain->dev->intfnum, | |
1011 | ctrl->info.selector, | |
1012 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1013 | ctrl->info.size); | |
1014 | } | |
cb74d482 HG |
1015 | if (ret < 0) |
1016 | return ret; | |
1017 | ||
1018 | ctrl->loaded = 1; | |
1019 | } | |
1020 | ||
e5225c82 GL |
1021 | *value = __uvc_ctrl_get_value(mapping, |
1022 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
cb74d482 HG |
1023 | |
1024 | return 0; | |
1025 | } | |
1026 | ||
35f16741 HG |
1027 | static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, |
1028 | struct uvc_control *ctrl, | |
1029 | struct uvc_control_mapping *mapping, | |
c0efd232 LP |
1030 | struct v4l2_queryctrl *v4l2_ctrl) |
1031 | { | |
55afeb8a HG |
1032 | struct uvc_control_mapping *master_map = NULL; |
1033 | struct uvc_control *master_ctrl = NULL; | |
52a4eb31 | 1034 | const struct uvc_menu_info *menu; |
c0efd232 | 1035 | unsigned int i; |
c0efd232 | 1036 | |
f14d4988 | 1037 | memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); |
c0efd232 LP |
1038 | v4l2_ctrl->id = mapping->id; |
1039 | v4l2_ctrl->type = mapping->v4l2_type; | |
c0decac1 | 1040 | strscpy(v4l2_ctrl->name, mapping->name, sizeof(v4l2_ctrl->name)); |
c0efd232 LP |
1041 | v4l2_ctrl->flags = 0; |
1042 | ||
9eb30d2f | 1043 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) |
a90ef69c | 1044 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; |
9eb30d2f | 1045 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) |
c0efd232 LP |
1046 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
1047 | ||
55afeb8a HG |
1048 | if (mapping->master_id) |
1049 | __uvc_find_control(ctrl->entity, mapping->master_id, | |
1050 | &master_map, &master_ctrl, 0); | |
1051 | if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { | |
1052 | s32 val; | |
1053 | int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); | |
1054 | if (ret < 0) | |
1055 | return ret; | |
1056 | ||
1057 | if (val != mapping->master_manual) | |
1058 | v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
1059 | } | |
1060 | ||
59529081 | 1061 | if (!ctrl->cached) { |
35f16741 | 1062 | int ret = uvc_ctrl_populate_cache(chain, ctrl); |
b482d923 | 1063 | if (ret < 0) |
35f16741 | 1064 | return ret; |
59529081 LP |
1065 | } |
1066 | ||
9eb30d2f | 1067 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { |
59529081 LP |
1068 | v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, |
1069 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); | |
c0efd232 LP |
1070 | } |
1071 | ||
54812c77 LP |
1072 | switch (mapping->v4l2_type) { |
1073 | case V4L2_CTRL_TYPE_MENU: | |
c0efd232 LP |
1074 | v4l2_ctrl->minimum = 0; |
1075 | v4l2_ctrl->maximum = mapping->menu_count - 1; | |
1076 | v4l2_ctrl->step = 1; | |
1077 | ||
1078 | menu = mapping->menu_info; | |
1079 | for (i = 0; i < mapping->menu_count; ++i, ++menu) { | |
1080 | if (menu->value == v4l2_ctrl->default_value) { | |
1081 | v4l2_ctrl->default_value = i; | |
1082 | break; | |
1083 | } | |
1084 | } | |
1085 | ||
35f16741 | 1086 | return 0; |
54812c77 LP |
1087 | |
1088 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1089 | v4l2_ctrl->minimum = 0; | |
1090 | v4l2_ctrl->maximum = 1; | |
1091 | v4l2_ctrl->step = 1; | |
35f16741 | 1092 | return 0; |
54812c77 | 1093 | |
f4eabafe LP |
1094 | case V4L2_CTRL_TYPE_BUTTON: |
1095 | v4l2_ctrl->minimum = 0; | |
1096 | v4l2_ctrl->maximum = 0; | |
1097 | v4l2_ctrl->step = 0; | |
35f16741 | 1098 | return 0; |
f4eabafe | 1099 | |
54812c77 LP |
1100 | default: |
1101 | break; | |
c0efd232 LP |
1102 | } |
1103 | ||
9eb30d2f | 1104 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) |
59529081 LP |
1105 | v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, |
1106 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
c0efd232 | 1107 | |
9eb30d2f | 1108 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) |
59529081 LP |
1109 | v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, |
1110 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1111 | ||
9eb30d2f | 1112 | if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) |
59529081 LP |
1113 | v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, |
1114 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1115 | ||
35f16741 HG |
1116 | return 0; |
1117 | } | |
1118 | ||
1119 | int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, | |
1120 | struct v4l2_queryctrl *v4l2_ctrl) | |
1121 | { | |
1122 | struct uvc_control *ctrl; | |
1123 | struct uvc_control_mapping *mapping; | |
1124 | int ret; | |
1125 | ||
1126 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1127 | if (ret < 0) | |
1128 | return -ERESTARTSYS; | |
1129 | ||
1130 | ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); | |
1131 | if (ctrl == NULL) { | |
9c016d61 | 1132 | ret = -EINVAL; |
35f16741 HG |
1133 | goto done; |
1134 | } | |
1135 | ||
1136 | ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); | |
27a61c13 LP |
1137 | done: |
1138 | mutex_unlock(&chain->ctrl_mutex); | |
1139 | return ret; | |
c0efd232 LP |
1140 | } |
1141 | ||
23d9f3ef | 1142 | /* |
ec55cdba | 1143 | * Mapping V4L2 controls to UVC controls can be straightforward if done well. |
23d9f3ef LP |
1144 | * Most of the UVC controls exist in V4L2, and can be mapped directly. Some |
1145 | * must be grouped (for instance the Red Balance, Blue Balance and Do White | |
1146 | * Balance V4L2 controls use the White Balance Component UVC control) or | |
1147 | * otherwise translated. The approach we take here is to use a translation | |
1148 | * table for the controls that can be mapped directly, and handle the others | |
1149 | * manually. | |
1150 | */ | |
1151 | int uvc_query_v4l2_menu(struct uvc_video_chain *chain, | |
1152 | struct v4l2_querymenu *query_menu) | |
1153 | { | |
52a4eb31 | 1154 | const struct uvc_menu_info *menu_info; |
23d9f3ef LP |
1155 | struct uvc_control_mapping *mapping; |
1156 | struct uvc_control *ctrl; | |
1157 | u32 index = query_menu->index; | |
1158 | u32 id = query_menu->id; | |
1159 | int ret; | |
1160 | ||
1161 | memset(query_menu, 0, sizeof(*query_menu)); | |
1162 | query_menu->id = id; | |
1163 | query_menu->index = index; | |
1164 | ||
1165 | ret = mutex_lock_interruptible(&chain->ctrl_mutex); | |
1166 | if (ret < 0) | |
1167 | return -ERESTARTSYS; | |
1168 | ||
1169 | ctrl = uvc_find_control(chain, query_menu->id, &mapping); | |
9c016d61 RW |
1170 | if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { |
1171 | ret = -EINVAL; | |
23d9f3ef LP |
1172 | goto done; |
1173 | } | |
1174 | ||
9c016d61 | 1175 | if (query_menu->index >= mapping->menu_count) { |
23d9f3ef LP |
1176 | ret = -EINVAL; |
1177 | goto done; | |
1178 | } | |
1179 | ||
1180 | menu_info = &mapping->menu_info[query_menu->index]; | |
fc2d573f | 1181 | |
241fa6e4 HG |
1182 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1183 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
fc2d573f LP |
1184 | s32 bitmap; |
1185 | ||
1186 | if (!ctrl->cached) { | |
1187 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1188 | if (ret < 0) | |
1189 | goto done; | |
1190 | } | |
1191 | ||
1192 | bitmap = mapping->get(mapping, UVC_GET_RES, | |
1193 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1194 | if (!(bitmap & menu_info->value)) { | |
1195 | ret = -EINVAL; | |
1196 | goto done; | |
1197 | } | |
1198 | } | |
1199 | ||
c0decac1 | 1200 | strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name)); |
23d9f3ef LP |
1201 | |
1202 | done: | |
1203 | mutex_unlock(&chain->ctrl_mutex); | |
1204 | return ret; | |
1205 | } | |
1206 | ||
b4012002 HG |
1207 | /* -------------------------------------------------------------------------- |
1208 | * Ctrl event handling | |
1209 | */ | |
1210 | ||
1211 | static void uvc_ctrl_fill_event(struct uvc_video_chain *chain, | |
1212 | struct v4l2_event *ev, | |
1213 | struct uvc_control *ctrl, | |
1214 | struct uvc_control_mapping *mapping, | |
1215 | s32 value, u32 changes) | |
1216 | { | |
1217 | struct v4l2_queryctrl v4l2_ctrl; | |
1218 | ||
1219 | __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl); | |
1220 | ||
f45f3f75 | 1221 | memset(ev, 0, sizeof(*ev)); |
b4012002 HG |
1222 | ev->type = V4L2_EVENT_CTRL; |
1223 | ev->id = v4l2_ctrl.id; | |
1224 | ev->u.ctrl.value = value; | |
1225 | ev->u.ctrl.changes = changes; | |
1226 | ev->u.ctrl.type = v4l2_ctrl.type; | |
1227 | ev->u.ctrl.flags = v4l2_ctrl.flags; | |
1228 | ev->u.ctrl.minimum = v4l2_ctrl.minimum; | |
1229 | ev->u.ctrl.maximum = v4l2_ctrl.maximum; | |
1230 | ev->u.ctrl.step = v4l2_ctrl.step; | |
1231 | ev->u.ctrl.default_value = v4l2_ctrl.default_value; | |
1232 | } | |
1233 | ||
e5225c82 GL |
1234 | /* |
1235 | * Send control change events to all subscribers for the @ctrl control. By | |
1236 | * default the subscriber that generated the event, as identified by @handle, | |
1237 | * is not notified unless it has set the V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK flag. | |
1238 | * @handle can be NULL for asynchronous events related to auto-update controls, | |
1239 | * in which case all subscribers are notified. | |
1240 | */ | |
1241 | static void uvc_ctrl_send_event(struct uvc_video_chain *chain, | |
1242 | struct uvc_fh *handle, struct uvc_control *ctrl, | |
1243 | struct uvc_control_mapping *mapping, s32 value, u32 changes) | |
b4012002 | 1244 | { |
e5225c82 | 1245 | struct v4l2_fh *originator = handle ? &handle->vfh : NULL; |
b4012002 HG |
1246 | struct v4l2_subscribed_event *sev; |
1247 | struct v4l2_event ev; | |
1248 | ||
1249 | if (list_empty(&mapping->ev_subs)) | |
1250 | return; | |
1251 | ||
e5225c82 | 1252 | uvc_ctrl_fill_event(chain, &ev, ctrl, mapping, value, changes); |
b4012002 HG |
1253 | |
1254 | list_for_each_entry(sev, &mapping->ev_subs, node) { | |
e5225c82 | 1255 | if (sev->fh != originator || |
805e9b4a | 1256 | (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || |
222964ea | 1257 | (changes & V4L2_EVENT_CTRL_CH_FLAGS)) |
b4012002 HG |
1258 | v4l2_event_queue_fh(sev->fh, &ev); |
1259 | } | |
1260 | } | |
1261 | ||
e5225c82 GL |
1262 | /* |
1263 | * Send control change events for the slave of the @master control identified | |
1264 | * by the V4L2 ID @slave_id. The @handle identifies the event subscriber that | |
1265 | * generated the event and may be NULL for auto-update events. | |
1266 | */ | |
1267 | static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, | |
1268 | struct uvc_fh *handle, struct uvc_control *master, u32 slave_id) | |
805e9b4a HG |
1269 | { |
1270 | struct uvc_control_mapping *mapping = NULL; | |
1271 | struct uvc_control *ctrl = NULL; | |
1272 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
805e9b4a HG |
1273 | s32 val = 0; |
1274 | ||
805e9b4a HG |
1275 | __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); |
1276 | if (ctrl == NULL) | |
1277 | return; | |
1278 | ||
e5225c82 | 1279 | if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0) |
805e9b4a HG |
1280 | changes |= V4L2_EVENT_CTRL_CH_VALUE; |
1281 | ||
e5225c82 GL |
1282 | uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); |
1283 | } | |
1284 | ||
d9c8763e RR |
1285 | void uvc_ctrl_status_event(struct uvc_video_chain *chain, |
1286 | struct uvc_control *ctrl, const u8 *data) | |
e5225c82 | 1287 | { |
e5225c82 | 1288 | struct uvc_control_mapping *mapping; |
e5225c82 GL |
1289 | struct uvc_fh *handle; |
1290 | unsigned int i; | |
e5225c82 GL |
1291 | |
1292 | mutex_lock(&chain->ctrl_mutex); | |
1293 | ||
1294 | handle = ctrl->handle; | |
1295 | ctrl->handle = NULL; | |
1296 | ||
1297 | list_for_each_entry(mapping, &ctrl->info.mappings, list) { | |
d9c8763e | 1298 | s32 value = __uvc_ctrl_get_value(mapping, data); |
e5225c82 GL |
1299 | |
1300 | /* | |
1301 | * handle may be NULL here if the device sends auto-update | |
1302 | * events without a prior related control set from userspace. | |
1303 | */ | |
1304 | for (i = 0; i < ARRAY_SIZE(mapping->slave_ids); ++i) { | |
1305 | if (!mapping->slave_ids[i]) | |
1306 | break; | |
1307 | ||
1308 | uvc_ctrl_send_slave_event(chain, handle, ctrl, | |
1309 | mapping->slave_ids[i]); | |
1310 | } | |
1311 | ||
1312 | uvc_ctrl_send_event(chain, handle, ctrl, mapping, value, | |
1313 | V4L2_EVENT_CTRL_CH_VALUE); | |
1314 | } | |
1315 | ||
1316 | mutex_unlock(&chain->ctrl_mutex); | |
d9c8763e RR |
1317 | } |
1318 | ||
1319 | static void uvc_ctrl_status_event_work(struct work_struct *work) | |
1320 | { | |
1321 | struct uvc_device *dev = container_of(work, struct uvc_device, | |
1322 | async_ctrl.work); | |
1323 | struct uvc_ctrl_work *w = &dev->async_ctrl; | |
1324 | int ret; | |
1325 | ||
1326 | uvc_ctrl_status_event(w->chain, w->ctrl, w->data); | |
e5225c82 GL |
1327 | |
1328 | /* Resubmit the URB. */ | |
1329 | w->urb->interval = dev->int_ep->desc.bInterval; | |
1330 | ret = usb_submit_urb(w->urb, GFP_KERNEL); | |
1331 | if (ret < 0) | |
69df0954 RR |
1332 | dev_err(&dev->udev->dev, |
1333 | "Failed to resubmit status URB (%d).\n", ret); | |
e5225c82 GL |
1334 | } |
1335 | ||
d9c8763e RR |
1336 | bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain, |
1337 | struct uvc_control *ctrl, const u8 *data) | |
e5225c82 GL |
1338 | { |
1339 | struct uvc_device *dev = chain->dev; | |
1340 | struct uvc_ctrl_work *w = &dev->async_ctrl; | |
1341 | ||
1342 | if (list_empty(&ctrl->info.mappings)) { | |
1343 | ctrl->handle = NULL; | |
1344 | return false; | |
1345 | } | |
1346 | ||
1347 | w->data = data; | |
1348 | w->urb = urb; | |
1349 | w->chain = chain; | |
1350 | w->ctrl = ctrl; | |
1351 | ||
1352 | schedule_work(&w->work); | |
1353 | ||
1354 | return true; | |
1355 | } | |
1356 | ||
1357 | static bool uvc_ctrl_xctrls_has_control(const struct v4l2_ext_control *xctrls, | |
1358 | unsigned int xctrls_count, u32 id) | |
1359 | { | |
1360 | unsigned int i; | |
1361 | ||
1362 | for (i = 0; i < xctrls_count; ++i) { | |
1363 | if (xctrls[i].id == id) | |
1364 | return true; | |
1365 | } | |
1366 | ||
1367 | return false; | |
805e9b4a HG |
1368 | } |
1369 | ||
b4012002 HG |
1370 | static void uvc_ctrl_send_events(struct uvc_fh *handle, |
1371 | const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) | |
1372 | { | |
1373 | struct uvc_control_mapping *mapping; | |
1374 | struct uvc_control *ctrl; | |
805e9b4a | 1375 | u32 changes = V4L2_EVENT_CTRL_CH_VALUE; |
b4012002 | 1376 | unsigned int i; |
805e9b4a | 1377 | unsigned int j; |
b4012002 HG |
1378 | |
1379 | for (i = 0; i < xctrls_count; ++i) { | |
1380 | ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping); | |
805e9b4a | 1381 | |
e5225c82 GL |
1382 | if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) |
1383 | /* Notification will be sent from an Interrupt event. */ | |
1384 | continue; | |
1385 | ||
805e9b4a | 1386 | for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { |
e5225c82 GL |
1387 | u32 slave_id = mapping->slave_ids[j]; |
1388 | ||
1389 | if (!slave_id) | |
805e9b4a | 1390 | break; |
e5225c82 GL |
1391 | |
1392 | /* | |
1393 | * We can skip sending an event for the slave if the | |
1394 | * slave is being modified in the same transaction. | |
1395 | */ | |
1396 | if (uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, | |
1397 | slave_id)) | |
1398 | continue; | |
1399 | ||
1400 | uvc_ctrl_send_slave_event(handle->chain, handle, ctrl, | |
1401 | slave_id); | |
805e9b4a HG |
1402 | } |
1403 | ||
1404 | /* | |
1405 | * If the master is being modified in the same transaction | |
1406 | * flags may change too. | |
1407 | */ | |
e5225c82 GL |
1408 | if (mapping->master_id && |
1409 | uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, | |
1410 | mapping->master_id)) | |
1411 | changes |= V4L2_EVENT_CTRL_CH_FLAGS; | |
805e9b4a | 1412 | |
e5225c82 GL |
1413 | uvc_ctrl_send_event(handle->chain, handle, ctrl, mapping, |
1414 | xctrls[i].value, changes); | |
b4012002 HG |
1415 | } |
1416 | } | |
1417 | ||
6e6d76cd | 1418 | static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) |
b4012002 HG |
1419 | { |
1420 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1421 | struct uvc_control_mapping *mapping; | |
1422 | struct uvc_control *ctrl; | |
1423 | int ret; | |
1424 | ||
1425 | ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex); | |
1426 | if (ret < 0) | |
1427 | return -ERESTARTSYS; | |
1428 | ||
1429 | ctrl = uvc_find_control(handle->chain, sev->id, &mapping); | |
1430 | if (ctrl == NULL) { | |
9c016d61 | 1431 | ret = -EINVAL; |
b4012002 HG |
1432 | goto done; |
1433 | } | |
1434 | ||
1435 | list_add_tail(&sev->node, &mapping->ev_subs); | |
1436 | if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) { | |
1437 | struct v4l2_event ev; | |
1438 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; | |
1439 | s32 val = 0; | |
1440 | ||
1441 | if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) | |
1442 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
1443 | ||
1444 | uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, | |
1445 | changes); | |
6e6d76cd HV |
1446 | /* Mark the queue as active, allowing this initial |
1447 | event to be accepted. */ | |
1448 | sev->elems = elems; | |
b4012002 HG |
1449 | v4l2_event_queue_fh(sev->fh, &ev); |
1450 | } | |
1451 | ||
1452 | done: | |
1453 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1454 | return ret; | |
1455 | } | |
1456 | ||
1457 | static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev) | |
1458 | { | |
1459 | struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); | |
1460 | ||
1461 | mutex_lock(&handle->chain->ctrl_mutex); | |
1462 | list_del(&sev->node); | |
1463 | mutex_unlock(&handle->chain->ctrl_mutex); | |
1464 | } | |
1465 | ||
1466 | const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = { | |
1467 | .add = uvc_ctrl_add_event, | |
1468 | .del = uvc_ctrl_del_event, | |
1469 | .replace = v4l2_ctrl_replace, | |
1470 | .merge = v4l2_ctrl_merge, | |
1471 | }; | |
c0efd232 LP |
1472 | |
1473 | /* -------------------------------------------------------------------------- | |
1474 | * Control transactions | |
1475 | * | |
1476 | * To make extended set operations as atomic as the hardware allows, controls | |
1477 | * are handled using begin/commit/rollback operations. | |
1478 | * | |
1479 | * At the beginning of a set request, uvc_ctrl_begin should be called to | |
1480 | * initialize the request. This function acquires the control lock. | |
1481 | * | |
1482 | * When setting a control, the new value is stored in the control data field | |
1483 | * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for | |
1484 | * later processing. If the UVC and V4L2 control sizes differ, the current | |
1485 | * value is loaded from the hardware before storing the new value in the data | |
1486 | * field. | |
1487 | * | |
1488 | * After processing all controls in the transaction, uvc_ctrl_commit or | |
1489 | * uvc_ctrl_rollback must be called to apply the pending changes to the | |
1490 | * hardware or revert them. When applying changes, all controls marked as | |
1491 | * dirty will be modified in the UVC device, and the dirty flag will be | |
1492 | * cleared. When reverting controls, the control data field | |
1493 | * UVC_CTRL_DATA_CURRENT is reverted to its previous value | |
1494 | * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the | |
1495 | * control lock. | |
1496 | */ | |
8e113595 | 1497 | int uvc_ctrl_begin(struct uvc_video_chain *chain) |
c0efd232 | 1498 | { |
8e113595 | 1499 | return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; |
c0efd232 LP |
1500 | } |
1501 | ||
1502 | static int uvc_ctrl_commit_entity(struct uvc_device *dev, | |
1503 | struct uvc_entity *entity, int rollback) | |
1504 | { | |
1505 | struct uvc_control *ctrl; | |
1506 | unsigned int i; | |
1507 | int ret; | |
1508 | ||
1509 | if (entity == NULL) | |
1510 | return 0; | |
1511 | ||
1512 | for (i = 0; i < entity->ncontrols; ++i) { | |
1513 | ctrl = &entity->controls[i]; | |
071c8bb8 | 1514 | if (!ctrl->initialized) |
b1accfa1 LP |
1515 | continue; |
1516 | ||
1517 | /* Reset the loaded flag for auto-update controls that were | |
1518 | * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent | |
6b363f9f LP |
1519 | * uvc_ctrl_get from using the cached value, and for write-only |
1520 | * controls to prevent uvc_ctrl_set from setting bits not | |
1521 | * explicitly set by the user. | |
b1accfa1 | 1522 | */ |
6b363f9f LP |
1523 | if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE || |
1524 | !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) | |
b1accfa1 LP |
1525 | ctrl->loaded = 0; |
1526 | ||
1527 | if (!ctrl->dirty) | |
c0efd232 LP |
1528 | continue; |
1529 | ||
1530 | if (!rollback) | |
b482d923 | 1531 | ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, |
071c8bb8 | 1532 | dev->intfnum, ctrl->info.selector, |
c0efd232 | 1533 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1534 | ctrl->info.size); |
c0efd232 LP |
1535 | else |
1536 | ret = 0; | |
1537 | ||
1538 | if (rollback || ret < 0) | |
1539 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
1540 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
071c8bb8 | 1541 | ctrl->info.size); |
c0efd232 | 1542 | |
c0efd232 LP |
1543 | ctrl->dirty = 0; |
1544 | ||
1545 | if (ret < 0) | |
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | return 0; | |
1550 | } | |
1551 | ||
b4012002 HG |
1552 | int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, |
1553 | const struct v4l2_ext_control *xctrls, | |
1554 | unsigned int xctrls_count) | |
c0efd232 | 1555 | { |
b4012002 | 1556 | struct uvc_video_chain *chain = handle->chain; |
c0efd232 LP |
1557 | struct uvc_entity *entity; |
1558 | int ret = 0; | |
1559 | ||
1560 | /* Find the control. */ | |
6241d8ca | 1561 | list_for_each_entry(entity, &chain->entities, chain) { |
8e113595 | 1562 | ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); |
c0efd232 LP |
1563 | if (ret < 0) |
1564 | goto done; | |
1565 | } | |
1566 | ||
b4012002 HG |
1567 | if (!rollback) |
1568 | uvc_ctrl_send_events(handle, xctrls, xctrls_count); | |
c0efd232 | 1569 | done: |
8e113595 | 1570 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1571 | return ret; |
1572 | } | |
1573 | ||
35f16741 HG |
1574 | int uvc_ctrl_get(struct uvc_video_chain *chain, |
1575 | struct v4l2_ext_control *xctrl) | |
1576 | { | |
1577 | struct uvc_control *ctrl; | |
1578 | struct uvc_control_mapping *mapping; | |
1579 | ||
1580 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); | |
1581 | if (ctrl == NULL) | |
9c016d61 | 1582 | return -EINVAL; |
35f16741 HG |
1583 | |
1584 | return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); | |
1585 | } | |
1586 | ||
e5225c82 | 1587 | int uvc_ctrl_set(struct uvc_fh *handle, |
c0efd232 LP |
1588 | struct v4l2_ext_control *xctrl) |
1589 | { | |
e5225c82 | 1590 | struct uvc_video_chain *chain = handle->chain; |
c0efd232 LP |
1591 | struct uvc_control *ctrl; |
1592 | struct uvc_control_mapping *mapping; | |
e54532e5 LP |
1593 | s32 value; |
1594 | u32 step; | |
1595 | s32 min; | |
1596 | s32 max; | |
c0efd232 LP |
1597 | int ret; |
1598 | ||
8e113595 | 1599 | ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
9bf42300 | 1600 | if (ctrl == NULL) |
9c016d61 | 1601 | return -EINVAL; |
9bf42300 LP |
1602 | if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) |
1603 | return -EACCES; | |
c0efd232 | 1604 | |
e54532e5 LP |
1605 | /* Clamp out of range values. */ |
1606 | switch (mapping->v4l2_type) { | |
1607 | case V4L2_CTRL_TYPE_INTEGER: | |
1608 | if (!ctrl->cached) { | |
1609 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1610 | if (ret < 0) | |
1611 | return ret; | |
1612 | } | |
1613 | ||
1614 | min = mapping->get(mapping, UVC_GET_MIN, | |
1615 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); | |
1616 | max = mapping->get(mapping, UVC_GET_MAX, | |
1617 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); | |
1618 | step = mapping->get(mapping, UVC_GET_RES, | |
1619 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
cf7a50ee LP |
1620 | if (step == 0) |
1621 | step = 1; | |
e54532e5 | 1622 | |
7ae53081 | 1623 | xctrl->value = min + DIV_ROUND_CLOSEST((u32)(xctrl->value - min), |
1624 | step) * step; | |
64ae9958 LP |
1625 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) |
1626 | xctrl->value = clamp(xctrl->value, min, max); | |
1627 | else | |
1628 | xctrl->value = clamp_t(u32, xctrl->value, min, max); | |
e54532e5 LP |
1629 | value = xctrl->value; |
1630 | break; | |
1631 | ||
1632 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1633 | xctrl->value = clamp(xctrl->value, 0, 1); | |
1634 | value = xctrl->value; | |
1635 | break; | |
1636 | ||
1637 | case V4L2_CTRL_TYPE_MENU: | |
1638 | if (xctrl->value < 0 || xctrl->value >= mapping->menu_count) | |
8a4e76c1 | 1639 | return -ERANGE; |
e54532e5 | 1640 | value = mapping->menu_info[xctrl->value].value; |
f411f103 LP |
1641 | |
1642 | /* Valid menu indices are reported by the GET_RES request for | |
1643 | * UVC controls that support it. | |
1644 | */ | |
241fa6e4 HG |
1645 | if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
1646 | (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { | |
f411f103 LP |
1647 | if (!ctrl->cached) { |
1648 | ret = uvc_ctrl_populate_cache(chain, ctrl); | |
1649 | if (ret < 0) | |
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | step = mapping->get(mapping, UVC_GET_RES, | |
1654 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); | |
1655 | if (!(step & value)) | |
b4186971 | 1656 | return -EINVAL; |
f411f103 LP |
1657 | } |
1658 | ||
e54532e5 LP |
1659 | break; |
1660 | ||
1661 | default: | |
1662 | value = xctrl->value; | |
1663 | break; | |
c0efd232 LP |
1664 | } |
1665 | ||
e54532e5 LP |
1666 | /* If the mapping doesn't span the whole UVC control, the current value |
1667 | * needs to be loaded from the device to perform the read-modify-write | |
1668 | * operation. | |
1669 | */ | |
071c8bb8 | 1670 | if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) { |
9eb30d2f | 1671 | if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { |
c0efd232 | 1672 | memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1673 | 0, ctrl->info.size); |
c0efd232 | 1674 | } else { |
8e113595 LP |
1675 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
1676 | ctrl->entity->id, chain->dev->intfnum, | |
071c8bb8 | 1677 | ctrl->info.selector, |
c0efd232 | 1678 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
071c8bb8 | 1679 | ctrl->info.size); |
c0efd232 LP |
1680 | if (ret < 0) |
1681 | return ret; | |
1682 | } | |
1683 | ||
b1accfa1 | 1684 | ctrl->loaded = 1; |
c0efd232 LP |
1685 | } |
1686 | ||
e54532e5 | 1687 | /* Backup the current value in case we need to rollback later. */ |
c0efd232 LP |
1688 | if (!ctrl->dirty) { |
1689 | memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), | |
1690 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), | |
071c8bb8 | 1691 | ctrl->info.size); |
c0efd232 LP |
1692 | } |
1693 | ||
9768352a LP |
1694 | mapping->set(mapping, value, |
1695 | uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); | |
c0efd232 | 1696 | |
e5225c82 GL |
1697 | if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) |
1698 | ctrl->handle = handle; | |
1699 | ||
c0efd232 LP |
1700 | ctrl->dirty = 1; |
1701 | ctrl->modified = 1; | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | /* -------------------------------------------------------------------------- | |
1706 | * Dynamic controls | |
1707 | */ | |
1708 | ||
859086ae ET |
1709 | /* |
1710 | * Retrieve flags for a given control | |
1711 | */ | |
1712 | static int uvc_ctrl_get_flags(struct uvc_device *dev, | |
1713 | const struct uvc_control *ctrl, | |
1714 | struct uvc_control_info *info) | |
1715 | { | |
1716 | u8 *data; | |
1717 | int ret; | |
1718 | ||
1719 | data = kmalloc(1, GFP_KERNEL); | |
1720 | if (data == NULL) | |
1721 | return -ENOMEM; | |
1722 | ||
65900c58 RR |
1723 | if (ctrl->entity->get_info) |
1724 | ret = ctrl->entity->get_info(dev, ctrl->entity, | |
1725 | ctrl->info.selector, data); | |
1726 | else | |
1727 | ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, | |
1728 | dev->intfnum, info->selector, data, 1); | |
859086ae | 1729 | if (!ret) |
0dc68cab KB |
1730 | info->flags |= (data[0] & UVC_CONTROL_CAP_GET ? |
1731 | UVC_CTRL_FLAG_GET_CUR : 0) | |
1732 | | (data[0] & UVC_CONTROL_CAP_SET ? | |
1733 | UVC_CTRL_FLAG_SET_CUR : 0) | |
1734 | | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ? | |
e5225c82 GL |
1735 | UVC_CTRL_FLAG_AUTO_UPDATE : 0) |
1736 | | (data[0] & UVC_CONTROL_CAP_ASYNCHRONOUS ? | |
1737 | UVC_CTRL_FLAG_ASYNCHRONOUS : 0); | |
859086ae ET |
1738 | |
1739 | kfree(data); | |
1740 | return ret; | |
1741 | } | |
1742 | ||
b5977a58 LP |
1743 | static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev, |
1744 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1745 | { | |
1746 | struct uvc_ctrl_fixup { | |
1747 | struct usb_device_id id; | |
1748 | u8 entity; | |
1749 | u8 selector; | |
1750 | u8 flags; | |
1751 | }; | |
1752 | ||
1753 | static const struct uvc_ctrl_fixup fixups[] = { | |
1754 | { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1, | |
9eb30d2f LP |
1755 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1756 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1757 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1758 | { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1, |
9eb30d2f LP |
1759 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1760 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1761 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 | 1762 | { { USB_DEVICE(0x046d, 0x0994) }, 9, 1, |
9eb30d2f LP |
1763 | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | |
1764 | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | | |
1765 | UVC_CTRL_FLAG_AUTO_UPDATE }, | |
b5977a58 LP |
1766 | }; |
1767 | ||
1768 | unsigned int i; | |
1769 | ||
1770 | for (i = 0; i < ARRAY_SIZE(fixups); ++i) { | |
1771 | if (!usb_match_one_id(dev->intf, &fixups[i].id)) | |
1772 | continue; | |
1773 | ||
1774 | if (fixups[i].entity == ctrl->entity->id && | |
1775 | fixups[i].selector == info->selector) { | |
1776 | info->flags = fixups[i].flags; | |
1777 | return; | |
1778 | } | |
1779 | } | |
1780 | } | |
1781 | ||
52c58ad6 LP |
1782 | /* |
1783 | * Query control information (size and flags) for XU controls. | |
1784 | */ | |
1785 | static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, | |
1786 | const struct uvc_control *ctrl, struct uvc_control_info *info) | |
1787 | { | |
1788 | u8 *data; | |
1789 | int ret; | |
1790 | ||
1791 | data = kmalloc(2, GFP_KERNEL); | |
1792 | if (data == NULL) | |
1793 | return -ENOMEM; | |
1794 | ||
351509c6 | 1795 | memcpy(info->entity, ctrl->entity->guid, sizeof(info->entity)); |
52c58ad6 LP |
1796 | info->index = ctrl->index; |
1797 | info->selector = ctrl->index + 1; | |
1798 | ||
1799 | /* Query and verify the control length (GET_LEN) */ | |
1800 | ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, | |
1801 | info->selector, data, 2); | |
1802 | if (ret < 0) { | |
9e56380a JP |
1803 | uvc_dbg(dev, CONTROL, |
1804 | "GET_LEN failed on control %pUl/%u (%d)\n", | |
1805 | info->entity, info->selector, ret); | |
52c58ad6 LP |
1806 | goto done; |
1807 | } | |
1808 | ||
1809 | info->size = le16_to_cpup((__le16 *)data); | |
1810 | ||
0dc68cab KB |
1811 | info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
1812 | | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF; | |
1813 | ||
859086ae | 1814 | ret = uvc_ctrl_get_flags(dev, ctrl, info); |
52c58ad6 | 1815 | if (ret < 0) { |
9e56380a JP |
1816 | uvc_dbg(dev, CONTROL, |
1817 | "Failed to get flags for control %pUl/%u (%d)\n", | |
1818 | info->entity, info->selector, ret); | |
52c58ad6 LP |
1819 | goto done; |
1820 | } | |
1821 | ||
b5977a58 LP |
1822 | uvc_ctrl_fixup_xu_info(dev, ctrl, info); |
1823 | ||
9e56380a JP |
1824 | uvc_dbg(dev, CONTROL, |
1825 | "XU control %pUl/%u queried: len %u, flags { get %u set %u auto %u }\n", | |
1826 | info->entity, info->selector, info->size, | |
1827 | (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0, | |
1828 | (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0, | |
1829 | (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0); | |
52c58ad6 LP |
1830 | |
1831 | done: | |
1832 | kfree(data); | |
1833 | return ret; | |
1834 | } | |
1835 | ||
1836 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
1837 | const struct uvc_control_info *info); | |
1838 | ||
1839 | static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev, | |
1840 | struct uvc_control *ctrl) | |
1841 | { | |
1842 | struct uvc_control_info info; | |
1843 | int ret; | |
1844 | ||
1845 | if (ctrl->initialized) | |
1846 | return 0; | |
1847 | ||
1848 | ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info); | |
1849 | if (ret < 0) | |
1850 | return ret; | |
1851 | ||
1852 | ret = uvc_ctrl_add_info(dev, ctrl, &info); | |
1853 | if (ret < 0) | |
9e56380a JP |
1854 | uvc_dbg(dev, CONTROL, |
1855 | "Failed to initialize control %pUl/%u on device %s entity %u\n", | |
1856 | info.entity, info.selector, dev->udev->devpath, | |
1857 | ctrl->entity->id); | |
52c58ad6 LP |
1858 | |
1859 | return ret; | |
1860 | } | |
1861 | ||
8e113595 | 1862 | int uvc_xu_ctrl_query(struct uvc_video_chain *chain, |
fe78d187 | 1863 | struct uvc_xu_control_query *xqry) |
c0efd232 LP |
1864 | { |
1865 | struct uvc_entity *entity; | |
fe78d187 | 1866 | struct uvc_control *ctrl; |
f875bcc3 DA |
1867 | unsigned int i; |
1868 | bool found; | |
2c6b222c LP |
1869 | u32 reqflags; |
1870 | u16 size; | |
1871 | u8 *data = NULL; | |
c0efd232 LP |
1872 | int ret; |
1873 | ||
1874 | /* Find the extension unit. */ | |
f875bcc3 | 1875 | found = false; |
6241d8ca LP |
1876 | list_for_each_entry(entity, &chain->entities, chain) { |
1877 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && | |
f875bcc3 DA |
1878 | entity->id == xqry->unit) { |
1879 | found = true; | |
c0efd232 | 1880 | break; |
f875bcc3 | 1881 | } |
c0efd232 LP |
1882 | } |
1883 | ||
f875bcc3 | 1884 | if (!found) { |
9e56380a JP |
1885 | uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n", |
1886 | xqry->unit); | |
fe78d187 | 1887 | return -ENOENT; |
c0efd232 LP |
1888 | } |
1889 | ||
52c58ad6 | 1890 | /* Find the control and perform delayed initialization if needed. */ |
f875bcc3 | 1891 | found = false; |
c0efd232 LP |
1892 | for (i = 0; i < entity->ncontrols; ++i) { |
1893 | ctrl = &entity->controls[i]; | |
fe78d187 | 1894 | if (ctrl->index == xqry->selector - 1) { |
f875bcc3 | 1895 | found = true; |
c0efd232 LP |
1896 | break; |
1897 | } | |
1898 | } | |
1899 | ||
1900 | if (!found) { | |
9e56380a JP |
1901 | uvc_dbg(chain->dev, CONTROL, "Control %pUl/%u not found\n", |
1902 | entity->guid, xqry->selector); | |
fe78d187 | 1903 | return -ENOENT; |
c0efd232 LP |
1904 | } |
1905 | ||
27a61c13 LP |
1906 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
1907 | return -ERESTARTSYS; | |
1908 | ||
52c58ad6 | 1909 | ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl); |
27a61c13 LP |
1910 | if (ret < 0) { |
1911 | ret = -ENOENT; | |
1912 | goto done; | |
1913 | } | |
52c58ad6 | 1914 | |
fe78d187 MR |
1915 | /* Validate the required buffer size and flags for the request */ |
1916 | reqflags = 0; | |
1917 | size = ctrl->info.size; | |
1918 | ||
1919 | switch (xqry->query) { | |
1920 | case UVC_GET_CUR: | |
9eb30d2f | 1921 | reqflags = UVC_CTRL_FLAG_GET_CUR; |
fe78d187 MR |
1922 | break; |
1923 | case UVC_GET_MIN: | |
9eb30d2f | 1924 | reqflags = UVC_CTRL_FLAG_GET_MIN; |
fe78d187 MR |
1925 | break; |
1926 | case UVC_GET_MAX: | |
9eb30d2f | 1927 | reqflags = UVC_CTRL_FLAG_GET_MAX; |
fe78d187 MR |
1928 | break; |
1929 | case UVC_GET_DEF: | |
9eb30d2f | 1930 | reqflags = UVC_CTRL_FLAG_GET_DEF; |
fe78d187 MR |
1931 | break; |
1932 | case UVC_GET_RES: | |
9eb30d2f | 1933 | reqflags = UVC_CTRL_FLAG_GET_RES; |
fe78d187 MR |
1934 | break; |
1935 | case UVC_SET_CUR: | |
9eb30d2f | 1936 | reqflags = UVC_CTRL_FLAG_SET_CUR; |
fe78d187 MR |
1937 | break; |
1938 | case UVC_GET_LEN: | |
1939 | size = 2; | |
1940 | break; | |
1941 | case UVC_GET_INFO: | |
1942 | size = 1; | |
1943 | break; | |
1944 | default: | |
27a61c13 LP |
1945 | ret = -EINVAL; |
1946 | goto done; | |
1947 | } | |
c0efd232 | 1948 | |
fe78d187 MR |
1949 | if (size != xqry->size) { |
1950 | ret = -ENOBUFS; | |
27a61c13 LP |
1951 | goto done; |
1952 | } | |
c0efd232 | 1953 | |
fe78d187 MR |
1954 | if (reqflags && !(ctrl->info.flags & reqflags)) { |
1955 | ret = -EBADRQC; | |
1956 | goto done; | |
1957 | } | |
1958 | ||
1959 | data = kmalloc(size, GFP_KERNEL); | |
1960 | if (data == NULL) { | |
1961 | ret = -ENOMEM; | |
1962 | goto done; | |
1963 | } | |
c0efd232 | 1964 | |
fe78d187 MR |
1965 | if (xqry->query == UVC_SET_CUR && |
1966 | copy_from_user(data, xqry->data, size)) { | |
c0efd232 | 1967 | ret = -EFAULT; |
27a61c13 | 1968 | goto done; |
c0efd232 LP |
1969 | } |
1970 | ||
fe78d187 MR |
1971 | ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit, |
1972 | chain->dev->intfnum, xqry->selector, data, size); | |
c0efd232 | 1973 | if (ret < 0) |
27a61c13 | 1974 | goto done; |
c0efd232 | 1975 | |
fe78d187 MR |
1976 | if (xqry->query != UVC_SET_CUR && |
1977 | copy_to_user(xqry->data, data, size)) | |
c0efd232 | 1978 | ret = -EFAULT; |
27a61c13 | 1979 | done: |
fe78d187 | 1980 | kfree(data); |
8e113595 | 1981 | mutex_unlock(&chain->ctrl_mutex); |
c0efd232 LP |
1982 | return ret; |
1983 | } | |
1984 | ||
1985 | /* -------------------------------------------------------------------------- | |
1986 | * Suspend/resume | |
1987 | */ | |
1988 | ||
1989 | /* | |
1990 | * Restore control values after resume, skipping controls that haven't been | |
1991 | * changed. | |
1992 | * | |
1993 | * TODO | |
1994 | * - Don't restore modified controls that are back to their default value. | |
1995 | * - Handle restore order (Auto-Exposure Mode should be restored before | |
1996 | * Exposure Time). | |
1997 | */ | |
17e1319f | 1998 | int uvc_ctrl_restore_values(struct uvc_device *dev) |
c0efd232 LP |
1999 | { |
2000 | struct uvc_control *ctrl; | |
2001 | struct uvc_entity *entity; | |
2002 | unsigned int i; | |
2003 | int ret; | |
2004 | ||
2005 | /* Walk the entities list and restore controls when possible. */ | |
2006 | list_for_each_entry(entity, &dev->entities, list) { | |
2007 | ||
2008 | for (i = 0; i < entity->ncontrols; ++i) { | |
2009 | ctrl = &entity->controls[i]; | |
2010 | ||
071c8bb8 | 2011 | if (!ctrl->initialized || !ctrl->modified || |
9eb30d2f | 2012 | (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) |
c0efd232 | 2013 | continue; |
69df0954 RR |
2014 | dev_info(&dev->udev->dev, |
2015 | "restoring control %pUl/%u/%u\n", | |
2016 | ctrl->info.entity, ctrl->info.index, | |
2017 | ctrl->info.selector); | |
c0efd232 LP |
2018 | ctrl->dirty = 1; |
2019 | } | |
2020 | ||
2021 | ret = uvc_ctrl_commit_entity(dev, entity, 0); | |
2022 | if (ret < 0) | |
2023 | return ret; | |
2024 | } | |
2025 | ||
2026 | return 0; | |
2027 | } | |
2028 | ||
2029 | /* -------------------------------------------------------------------------- | |
2030 | * Control and mapping handling | |
2031 | */ | |
2032 | ||
ba2fa996 LP |
2033 | /* |
2034 | * Add control information to a given control. | |
2035 | */ | |
2036 | static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, | |
2037 | const struct uvc_control_info *info) | |
2038 | { | |
8c0d44e2 | 2039 | ctrl->info = *info; |
071c8bb8 | 2040 | INIT_LIST_HEAD(&ctrl->info.mappings); |
ba2fa996 LP |
2041 | |
2042 | /* Allocate an array to save control values (cur, def, max, etc.) */ | |
071c8bb8 | 2043 | ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1, |
ba2fa996 | 2044 | GFP_KERNEL); |
bed888de HG |
2045 | if (!ctrl->uvc_data) |
2046 | return -ENOMEM; | |
b30ece53 | 2047 | |
071c8bb8 LP |
2048 | ctrl->initialized = 1; |
2049 | ||
9e56380a JP |
2050 | uvc_dbg(dev, CONTROL, "Added control %pUl/%u to device %s entity %u\n", |
2051 | ctrl->info.entity, ctrl->info.selector, dev->udev->devpath, | |
2052 | ctrl->entity->id); | |
b30ece53 | 2053 | |
bed888de | 2054 | return 0; |
c0efd232 LP |
2055 | } |
2056 | ||
2057 | /* | |
ba2fa996 | 2058 | * Add a control mapping to a given control. |
c0efd232 | 2059 | */ |
ba2fa996 LP |
2060 | static int __uvc_ctrl_add_mapping(struct uvc_device *dev, |
2061 | struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) | |
c0efd232 | 2062 | { |
ba2fa996 LP |
2063 | struct uvc_control_mapping *map; |
2064 | unsigned int size; | |
c0efd232 | 2065 | |
ba2fa996 LP |
2066 | /* Most mappings come from static kernel data and need to be duplicated. |
2067 | * Mappings that come from userspace will be unnecessarily duplicated, | |
2068 | * this could be optimized. | |
c0efd232 | 2069 | */ |
ba2fa996 LP |
2070 | map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL); |
2071 | if (map == NULL) | |
2072 | return -ENOMEM; | |
c0efd232 | 2073 | |
b4012002 HG |
2074 | INIT_LIST_HEAD(&map->ev_subs); |
2075 | ||
ba2fa996 LP |
2076 | size = sizeof(*mapping->menu_info) * mapping->menu_count; |
2077 | map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); | |
2078 | if (map->menu_info == NULL) { | |
2079 | kfree(map); | |
2080 | return -ENOMEM; | |
c0efd232 LP |
2081 | } |
2082 | ||
ba2fa996 LP |
2083 | if (map->get == NULL) |
2084 | map->get = uvc_get_le_value; | |
2085 | if (map->set == NULL) | |
2086 | map->set = uvc_set_le_value; | |
c0efd232 | 2087 | |
071c8bb8 | 2088 | list_add_tail(&map->list, &ctrl->info.mappings); |
9e56380a JP |
2089 | uvc_dbg(dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n", |
2090 | map->name, ctrl->info.entity, ctrl->info.selector); | |
ba2fa996 LP |
2091 | |
2092 | return 0; | |
c0efd232 LP |
2093 | } |
2094 | ||
ba2fa996 LP |
2095 | int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, |
2096 | const struct uvc_control_mapping *mapping) | |
c0efd232 | 2097 | { |
ba2fa996 | 2098 | struct uvc_device *dev = chain->dev; |
c0efd232 | 2099 | struct uvc_control_mapping *map; |
ba2fa996 LP |
2100 | struct uvc_entity *entity; |
2101 | struct uvc_control *ctrl; | |
2102 | int found = 0; | |
8fb91b33 | 2103 | int ret; |
9768352a | 2104 | |
c0efd232 | 2105 | if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
9e56380a JP |
2106 | uvc_dbg(dev, CONTROL, |
2107 | "Can't add mapping '%s', control id 0x%08x is invalid\n", | |
2108 | mapping->name, mapping->id); | |
c0efd232 LP |
2109 | return -EINVAL; |
2110 | } | |
2111 | ||
c0c5e71e SL |
2112 | /* Search for the matching (GUID/CS) control on the current chain */ |
2113 | list_for_each_entry(entity, &chain->entities, chain) { | |
ba2fa996 | 2114 | unsigned int i; |
c0efd232 | 2115 | |
52c58ad6 LP |
2116 | if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT || |
2117 | !uvc_entity_match_guid(entity, mapping->entity)) | |
ba2fa996 | 2118 | continue; |
c0efd232 | 2119 | |
ba2fa996 LP |
2120 | for (i = 0; i < entity->ncontrols; ++i) { |
2121 | ctrl = &entity->controls[i]; | |
52c58ad6 | 2122 | if (ctrl->index == mapping->selector - 1) { |
ba2fa996 LP |
2123 | found = 1; |
2124 | break; | |
c0efd232 LP |
2125 | } |
2126 | } | |
2127 | ||
ba2fa996 LP |
2128 | if (found) |
2129 | break; | |
2130 | } | |
2131 | if (!found) | |
2132 | return -ENOENT; | |
c0efd232 | 2133 | |
ba2fa996 LP |
2134 | if (mutex_lock_interruptible(&chain->ctrl_mutex)) |
2135 | return -ERESTARTSYS; | |
2136 | ||
52c58ad6 LP |
2137 | /* Perform delayed initialization of XU controls */ |
2138 | ret = uvc_ctrl_init_xu_ctrl(dev, ctrl); | |
2139 | if (ret < 0) { | |
2140 | ret = -ENOENT; | |
2141 | goto done; | |
2142 | } | |
2143 | ||
7e09f7d5 GR |
2144 | /* Validate the user-provided bit-size and offset */ |
2145 | if (mapping->size > 32 || | |
2146 | mapping->offset + mapping->size > ctrl->info.size * 8) { | |
2147 | ret = -EINVAL; | |
2148 | goto done; | |
2149 | } | |
2150 | ||
071c8bb8 | 2151 | list_for_each_entry(map, &ctrl->info.mappings, list) { |
ba2fa996 | 2152 | if (mapping->id == map->id) { |
9e56380a JP |
2153 | uvc_dbg(dev, CONTROL, |
2154 | "Can't add mapping '%s', control id 0x%08x already exists\n", | |
2155 | mapping->name, mapping->id); | |
ba2fa996 LP |
2156 | ret = -EEXIST; |
2157 | goto done; | |
2158 | } | |
c0efd232 | 2159 | } |
ba2fa996 | 2160 | |
8fb91b33 MR |
2161 | /* Prevent excess memory consumption */ |
2162 | if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) { | |
2163 | atomic_dec(&dev->nmappings); | |
9e56380a JP |
2164 | uvc_dbg(dev, CONTROL, |
2165 | "Can't add mapping '%s', maximum mappings count (%u) exceeded\n", | |
2166 | mapping->name, UVC_MAX_CONTROL_MAPPINGS); | |
8fb91b33 MR |
2167 | ret = -ENOMEM; |
2168 | goto done; | |
2169 | } | |
2170 | ||
ba2fa996 | 2171 | ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
8fb91b33 MR |
2172 | if (ret < 0) |
2173 | atomic_dec(&dev->nmappings); | |
2174 | ||
ba2fa996 LP |
2175 | done: |
2176 | mutex_unlock(&chain->ctrl_mutex); | |
c0efd232 LP |
2177 | return ret; |
2178 | } | |
2179 | ||
2bdd29cf | 2180 | /* |
d732c44c LP |
2181 | * Prune an entity of its bogus controls using a blacklist. Bogus controls |
2182 | * are currently the ones that crash the camera or unconditionally return an | |
2183 | * error when queried. | |
2bdd29cf | 2184 | */ |
ba2fa996 LP |
2185 | static void uvc_ctrl_prune_entity(struct uvc_device *dev, |
2186 | struct uvc_entity *entity) | |
2bdd29cf | 2187 | { |
fa34168b | 2188 | struct uvc_ctrl_blacklist { |
d732c44c LP |
2189 | struct usb_device_id id; |
2190 | u8 index; | |
fa34168b LP |
2191 | }; |
2192 | ||
2193 | static const struct uvc_ctrl_blacklist processing_blacklist[] = { | |
9405e3cb | 2194 | { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ |
d732c44c LP |
2195 | { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ |
2196 | { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ | |
2bdd29cf | 2197 | }; |
fa34168b LP |
2198 | static const struct uvc_ctrl_blacklist camera_blacklist[] = { |
2199 | { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */ | |
2200 | }; | |
2bdd29cf | 2201 | |
fa34168b | 2202 | const struct uvc_ctrl_blacklist *blacklist; |
2bdd29cf | 2203 | unsigned int size; |
fa34168b | 2204 | unsigned int count; |
2bdd29cf | 2205 | unsigned int i; |
fa34168b | 2206 | u8 *controls; |
2bdd29cf | 2207 | |
fa34168b LP |
2208 | switch (UVC_ENTITY_TYPE(entity)) { |
2209 | case UVC_VC_PROCESSING_UNIT: | |
2210 | blacklist = processing_blacklist; | |
2211 | count = ARRAY_SIZE(processing_blacklist); | |
2212 | controls = entity->processing.bmControls; | |
2213 | size = entity->processing.bControlSize; | |
2214 | break; | |
2215 | ||
2216 | case UVC_ITT_CAMERA: | |
2217 | blacklist = camera_blacklist; | |
2218 | count = ARRAY_SIZE(camera_blacklist); | |
2219 | controls = entity->camera.bmControls; | |
2220 | size = entity->camera.bControlSize; | |
2221 | break; | |
2bdd29cf | 2222 | |
fa34168b LP |
2223 | default: |
2224 | return; | |
2225 | } | |
2bdd29cf | 2226 | |
fa34168b | 2227 | for (i = 0; i < count; ++i) { |
385097e0 | 2228 | if (!usb_match_one_id(dev->intf, &blacklist[i].id)) |
2bdd29cf LP |
2229 | continue; |
2230 | ||
d732c44c LP |
2231 | if (blacklist[i].index >= 8 * size || |
2232 | !uvc_test_bit(controls, blacklist[i].index)) | |
2bdd29cf LP |
2233 | continue; |
2234 | ||
9e56380a JP |
2235 | uvc_dbg(dev, CONTROL, |
2236 | "%u/%u control is black listed, removing it\n", | |
2237 | entity->id, blacklist[i].index); | |
2bdd29cf | 2238 | |
d732c44c | 2239 | uvc_clear_bit(controls, blacklist[i].index); |
2bdd29cf LP |
2240 | } |
2241 | } | |
2242 | ||
ba2fa996 LP |
2243 | /* |
2244 | * Add control information and hardcoded stock control mappings to the given | |
2245 | * device. | |
2246 | */ | |
2247 | static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) | |
2248 | { | |
2249 | const struct uvc_control_info *info = uvc_ctrls; | |
2250 | const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls); | |
2251 | const struct uvc_control_mapping *mapping = uvc_ctrl_mappings; | |
2252 | const struct uvc_control_mapping *mend = | |
2253 | mapping + ARRAY_SIZE(uvc_ctrl_mappings); | |
2254 | ||
52c58ad6 LP |
2255 | /* XU controls initialization requires querying the device for control |
2256 | * information. As some buggy UVC devices will crash when queried | |
2257 | * repeatedly in a tight loop, delay XU controls initialization until | |
2258 | * first use. | |
2259 | */ | |
2260 | if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT) | |
ba2fa996 | 2261 | return; |
ba2fa996 LP |
2262 | |
2263 | for (; info < iend; ++info) { | |
2264 | if (uvc_entity_match_guid(ctrl->entity, info->entity) && | |
2265 | ctrl->index == info->index) { | |
2266 | uvc_ctrl_add_info(dev, ctrl, info); | |
93df48d3 HG |
2267 | /* |
2268 | * Retrieve control flags from the device. Ignore errors | |
2269 | * and work with default flag values from the uvc_ctrl | |
2270 | * array when the device doesn't properly implement | |
2271 | * GET_INFO on standard controls. | |
2272 | */ | |
2273 | uvc_ctrl_get_flags(dev, ctrl, &ctrl->info); | |
ba2fa996 LP |
2274 | break; |
2275 | } | |
2276 | } | |
2277 | ||
071c8bb8 | 2278 | if (!ctrl->initialized) |
ba2fa996 LP |
2279 | return; |
2280 | ||
2281 | for (; mapping < mend; ++mapping) { | |
2282 | if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && | |
071c8bb8 | 2283 | ctrl->info.selector == mapping->selector) |
ba2fa996 LP |
2284 | __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
2285 | } | |
2286 | } | |
2287 | ||
c0efd232 LP |
2288 | /* |
2289 | * Initialize device controls. | |
2290 | */ | |
2291 | int uvc_ctrl_init_device(struct uvc_device *dev) | |
2292 | { | |
c0efd232 LP |
2293 | struct uvc_entity *entity; |
2294 | unsigned int i; | |
2295 | ||
e5225c82 GL |
2296 | INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work); |
2297 | ||
c0efd232 LP |
2298 | /* Walk the entities list and instantiate controls */ |
2299 | list_for_each_entry(entity, &dev->entities, list) { | |
ba2fa996 | 2300 | struct uvc_control *ctrl; |
9a601396 | 2301 | unsigned int bControlSize = 0, ncontrols; |
2c6b222c | 2302 | u8 *bmControls = NULL; |
c0efd232 | 2303 | |
b482d923 | 2304 | if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { |
c0efd232 LP |
2305 | bmControls = entity->extension.bmControls; |
2306 | bControlSize = entity->extension.bControlSize; | |
b482d923 | 2307 | } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { |
c0efd232 LP |
2308 | bmControls = entity->processing.bmControls; |
2309 | bControlSize = entity->processing.bControlSize; | |
b482d923 | 2310 | } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { |
c0efd232 LP |
2311 | bmControls = entity->camera.bmControls; |
2312 | bControlSize = entity->camera.bControlSize; | |
2886477f RR |
2313 | } else if (UVC_ENTITY_TYPE(entity) == UVC_EXT_GPIO_UNIT) { |
2314 | bmControls = entity->gpio.bmControls; | |
2315 | bControlSize = entity->gpio.bControlSize; | |
c0efd232 LP |
2316 | } |
2317 | ||
ba2fa996 | 2318 | /* Remove bogus/blacklisted controls */ |
d732c44c | 2319 | uvc_ctrl_prune_entity(dev, entity); |
2bdd29cf | 2320 | |
ba2fa996 | 2321 | /* Count supported controls and allocate the controls array */ |
9a601396 | 2322 | ncontrols = memweight(bmControls, bControlSize); |
c0efd232 LP |
2323 | if (ncontrols == 0) |
2324 | continue; | |
2325 | ||
d0d97488 | 2326 | entity->controls = kcalloc(ncontrols, sizeof(*ctrl), |
ba2fa996 | 2327 | GFP_KERNEL); |
c0efd232 LP |
2328 | if (entity->controls == NULL) |
2329 | return -ENOMEM; | |
c0efd232 LP |
2330 | entity->ncontrols = ncontrols; |
2331 | ||
ba2fa996 | 2332 | /* Initialize all supported controls */ |
c0efd232 LP |
2333 | ctrl = entity->controls; |
2334 | for (i = 0; i < bControlSize * 8; ++i) { | |
2bdd29cf | 2335 | if (uvc_test_bit(bmControls, i) == 0) |
c0efd232 LP |
2336 | continue; |
2337 | ||
2338 | ctrl->entity = entity; | |
2339 | ctrl->index = i; | |
ba2fa996 LP |
2340 | |
2341 | uvc_ctrl_init_ctrl(dev, ctrl); | |
c0efd232 LP |
2342 | ctrl++; |
2343 | } | |
2344 | } | |
2345 | ||
c0efd232 LP |
2346 | return 0; |
2347 | } | |
2348 | ||
2349 | /* | |
2350 | * Cleanup device controls. | |
2351 | */ | |
ba2fa996 LP |
2352 | static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, |
2353 | struct uvc_control *ctrl) | |
c0efd232 | 2354 | { |
ba2fa996 | 2355 | struct uvc_control_mapping *mapping, *nm; |
c0efd232 | 2356 | |
071c8bb8 | 2357 | list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { |
ba2fa996 LP |
2358 | list_del(&mapping->list); |
2359 | kfree(mapping->menu_info); | |
2360 | kfree(mapping); | |
c0efd232 LP |
2361 | } |
2362 | } | |
2363 | ||
ba2fa996 | 2364 | void uvc_ctrl_cleanup_device(struct uvc_device *dev) |
561474c2 | 2365 | { |
ba2fa996 LP |
2366 | struct uvc_entity *entity; |
2367 | unsigned int i; | |
561474c2 | 2368 | |
11a087f4 ON |
2369 | /* Can be uninitialized if we are aborting on probe error. */ |
2370 | if (dev->async_ctrl.work.func) | |
2371 | cancel_work_sync(&dev->async_ctrl.work); | |
e5225c82 | 2372 | |
ba2fa996 LP |
2373 | /* Free controls and control mappings for all entities. */ |
2374 | list_for_each_entry(entity, &dev->entities, list) { | |
2375 | for (i = 0; i < entity->ncontrols; ++i) { | |
2376 | struct uvc_control *ctrl = &entity->controls[i]; | |
2377 | ||
071c8bb8 | 2378 | if (!ctrl->initialized) |
ba2fa996 | 2379 | continue; |
561474c2 | 2380 | |
ba2fa996 LP |
2381 | uvc_ctrl_cleanup_mappings(dev, ctrl); |
2382 | kfree(ctrl->uvc_data); | |
561474c2 LP |
2383 | } |
2384 | ||
ba2fa996 | 2385 | kfree(entity->controls); |
561474c2 LP |
2386 | } |
2387 | } |