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Commit | Line | Data |
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cdda479f LP |
1 | /* |
2 | * uvc_gadget.c -- USB Video Class Gadget driver | |
3 | * | |
4 | * Copyright (C) 2009-2010 | |
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
cdda479f LP |
11 | */ |
12 | ||
13 | #include <linux/kernel.h> | |
6d11ed76 | 14 | #include <linux/module.h> |
cdda479f LP |
15 | #include <linux/device.h> |
16 | #include <linux/errno.h> | |
17 | #include <linux/fs.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/mutex.h> | |
4d2079c1 | 20 | #include <linux/string.h> |
cdda479f LP |
21 | #include <linux/usb/ch9.h> |
22 | #include <linux/usb/gadget.h> | |
23 | #include <linux/usb/video.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/wait.h> | |
26 | ||
27 | #include <media/v4l2-dev.h> | |
28 | #include <media/v4l2-event.h> | |
29 | ||
46919a23 | 30 | #include "u_uvc.h" |
cdda479f | 31 | #include "uvc.h" |
46919a23 | 32 | #include "uvc_configfs.h" |
3a83c16e AP |
33 | #include "uvc_v4l2.h" |
34 | #include "uvc_video.h" | |
cdda479f | 35 | |
5d9955f8 | 36 | unsigned int uvc_gadget_trace_param; |
fbcaba0e | 37 | |
cdda479f LP |
38 | /* -------------------------------------------------------------------------- |
39 | * Function descriptors | |
40 | */ | |
41 | ||
42 | /* string IDs are assigned dynamically */ | |
43 | ||
43ff05e2 BS |
44 | #define UVC_STRING_CONTROL_IDX 0 |
45 | #define UVC_STRING_STREAMING_IDX 1 | |
cdda479f LP |
46 | |
47 | static struct usb_string uvc_en_us_strings[] = { | |
43ff05e2 | 48 | [UVC_STRING_CONTROL_IDX].s = "UVC Camera", |
cdda479f LP |
49 | [UVC_STRING_STREAMING_IDX].s = "Video Streaming", |
50 | { } | |
51 | }; | |
52 | ||
53 | static struct usb_gadget_strings uvc_stringtab = { | |
54 | .language = 0x0409, /* en-us */ | |
55 | .strings = uvc_en_us_strings, | |
56 | }; | |
57 | ||
58 | static struct usb_gadget_strings *uvc_function_strings[] = { | |
59 | &uvc_stringtab, | |
60 | NULL, | |
61 | }; | |
62 | ||
63 | #define UVC_INTF_VIDEO_CONTROL 0 | |
64 | #define UVC_INTF_VIDEO_STREAMING 1 | |
65 | ||
912ca429 | 66 | #define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */ |
57976636 | 67 | |
6d11ed76 | 68 | static struct usb_interface_assoc_descriptor uvc_iad = { |
bbafc0cb | 69 | .bLength = sizeof(uvc_iad), |
cdda479f LP |
70 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, |
71 | .bFirstInterface = 0, | |
72 | .bInterfaceCount = 2, | |
73 | .bFunctionClass = USB_CLASS_VIDEO, | |
bbafc0cb | 74 | .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION, |
cdda479f LP |
75 | .bFunctionProtocol = 0x00, |
76 | .iFunction = 0, | |
77 | }; | |
78 | ||
6d11ed76 | 79 | static struct usb_interface_descriptor uvc_control_intf = { |
cdda479f LP |
80 | .bLength = USB_DT_INTERFACE_SIZE, |
81 | .bDescriptorType = USB_DT_INTERFACE, | |
82 | .bInterfaceNumber = UVC_INTF_VIDEO_CONTROL, | |
83 | .bAlternateSetting = 0, | |
84 | .bNumEndpoints = 1, | |
85 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 86 | .bInterfaceSubClass = UVC_SC_VIDEOCONTROL, |
cdda479f LP |
87 | .bInterfaceProtocol = 0x00, |
88 | .iInterface = 0, | |
89 | }; | |
90 | ||
6d11ed76 | 91 | static struct usb_endpoint_descriptor uvc_control_ep = { |
cdda479f LP |
92 | .bLength = USB_DT_ENDPOINT_SIZE, |
93 | .bDescriptorType = USB_DT_ENDPOINT, | |
94 | .bEndpointAddress = USB_DIR_IN, | |
95 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
912ca429 | 96 | .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), |
cdda479f LP |
97 | .bInterval = 8, |
98 | }; | |
99 | ||
6d11ed76 | 100 | static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = { |
48eee0b4 LP |
101 | .bLength = sizeof(uvc_ss_control_comp), |
102 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
103 | /* The following 3 values can be tweaked if necessary. */ | |
104 | .bMaxBurst = 0, | |
105 | .bmAttributes = 0, | |
106 | .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), | |
107 | }; | |
108 | ||
6d11ed76 | 109 | static struct uvc_control_endpoint_descriptor uvc_control_cs_ep = { |
cdda479f LP |
110 | .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE, |
111 | .bDescriptorType = USB_DT_CS_ENDPOINT, | |
112 | .bDescriptorSubType = UVC_EP_INTERRUPT, | |
912ca429 | 113 | .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), |
cdda479f LP |
114 | }; |
115 | ||
6d11ed76 | 116 | static struct usb_interface_descriptor uvc_streaming_intf_alt0 = { |
cdda479f LP |
117 | .bLength = USB_DT_INTERFACE_SIZE, |
118 | .bDescriptorType = USB_DT_INTERFACE, | |
119 | .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, | |
120 | .bAlternateSetting = 0, | |
121 | .bNumEndpoints = 0, | |
122 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 123 | .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, |
cdda479f LP |
124 | .bInterfaceProtocol = 0x00, |
125 | .iInterface = 0, | |
126 | }; | |
127 | ||
6d11ed76 | 128 | static struct usb_interface_descriptor uvc_streaming_intf_alt1 = { |
cdda479f LP |
129 | .bLength = USB_DT_INTERFACE_SIZE, |
130 | .bDescriptorType = USB_DT_INTERFACE, | |
131 | .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, | |
132 | .bAlternateSetting = 1, | |
133 | .bNumEndpoints = 1, | |
134 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 135 | .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, |
cdda479f LP |
136 | .bInterfaceProtocol = 0x00, |
137 | .iInterface = 0, | |
138 | }; | |
139 | ||
6d11ed76 | 140 | static struct usb_endpoint_descriptor uvc_fs_streaming_ep = { |
cdda479f LP |
141 | .bLength = USB_DT_ENDPOINT_SIZE, |
142 | .bDescriptorType = USB_DT_ENDPOINT, | |
143 | .bEndpointAddress = USB_DIR_IN, | |
609a0532 BS |
144 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
145 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
146 | /* The wMaxPacketSize and bInterval values will be initialized from |
147 | * module parameters. | |
148 | */ | |
cdda479f LP |
149 | }; |
150 | ||
6d11ed76 | 151 | static struct usb_endpoint_descriptor uvc_hs_streaming_ep = { |
fbcaba0e BS |
152 | .bLength = USB_DT_ENDPOINT_SIZE, |
153 | .bDescriptorType = USB_DT_ENDPOINT, | |
154 | .bEndpointAddress = USB_DIR_IN, | |
609a0532 BS |
155 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
156 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
157 | /* The wMaxPacketSize and bInterval values will be initialized from |
158 | * module parameters. | |
159 | */ | |
fbcaba0e BS |
160 | }; |
161 | ||
6d11ed76 | 162 | static struct usb_endpoint_descriptor uvc_ss_streaming_ep = { |
ee6a4d87 LP |
163 | .bLength = USB_DT_ENDPOINT_SIZE, |
164 | .bDescriptorType = USB_DT_ENDPOINT, | |
fbcaba0e | 165 | |
ee6a4d87 | 166 | .bEndpointAddress = USB_DIR_IN, |
609a0532 BS |
167 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
168 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
169 | /* The wMaxPacketSize and bInterval values will be initialized from |
170 | * module parameters. | |
171 | */ | |
fbcaba0e BS |
172 | }; |
173 | ||
6d11ed76 | 174 | static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = { |
ee6a4d87 LP |
175 | .bLength = sizeof(uvc_ss_streaming_comp), |
176 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
dbbafe66 LP |
177 | /* The bMaxBurst, bmAttributes and wBytesPerInterval values will be |
178 | * initialized from module parameters. | |
179 | */ | |
fbcaba0e BS |
180 | }; |
181 | ||
cdda479f LP |
182 | static const struct usb_descriptor_header * const uvc_fs_streaming[] = { |
183 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
fbcaba0e | 184 | (struct usb_descriptor_header *) &uvc_fs_streaming_ep, |
cdda479f LP |
185 | NULL, |
186 | }; | |
187 | ||
188 | static const struct usb_descriptor_header * const uvc_hs_streaming[] = { | |
189 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
fbcaba0e BS |
190 | (struct usb_descriptor_header *) &uvc_hs_streaming_ep, |
191 | NULL, | |
192 | }; | |
193 | ||
194 | static const struct usb_descriptor_header * const uvc_ss_streaming[] = { | |
195 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
196 | (struct usb_descriptor_header *) &uvc_ss_streaming_ep, | |
197 | (struct usb_descriptor_header *) &uvc_ss_streaming_comp, | |
cdda479f LP |
198 | NULL, |
199 | }; | |
200 | ||
6d11ed76 AP |
201 | void uvc_set_trace_param(unsigned int trace) |
202 | { | |
203 | uvc_gadget_trace_param = trace; | |
204 | } | |
205 | EXPORT_SYMBOL(uvc_set_trace_param); | |
206 | ||
cdda479f LP |
207 | /* -------------------------------------------------------------------------- |
208 | * Control requests | |
209 | */ | |
210 | ||
211 | static void | |
212 | uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req) | |
213 | { | |
214 | struct uvc_device *uvc = req->context; | |
215 | struct v4l2_event v4l2_event; | |
216 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
217 | ||
218 | if (uvc->event_setup_out) { | |
219 | uvc->event_setup_out = 0; | |
220 | ||
221 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
222 | v4l2_event.type = UVC_EVENT_DATA; | |
223 | uvc_event->data.length = req->actual; | |
224 | memcpy(&uvc_event->data.data, req->buf, req->actual); | |
dbe98b30 | 225 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
226 | } |
227 | } | |
228 | ||
229 | static int | |
230 | uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) | |
231 | { | |
232 | struct uvc_device *uvc = to_uvc(f); | |
233 | struct v4l2_event v4l2_event; | |
234 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
235 | ||
236 | /* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n", | |
237 | * ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue), | |
238 | * le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength)); | |
239 | */ | |
240 | ||
241 | if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) { | |
242 | INFO(f->config->cdev, "invalid request type\n"); | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /* Stall too big requests. */ | |
247 | if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE) | |
248 | return -EINVAL; | |
249 | ||
26a029f2 LP |
250 | /* Tell the complete callback to generate an event for the next request |
251 | * that will be enqueued by UVCIOC_SEND_RESPONSE. | |
252 | */ | |
253 | uvc->event_setup_out = !(ctrl->bRequestType & USB_DIR_IN); | |
254 | uvc->event_length = le16_to_cpu(ctrl->wLength); | |
255 | ||
cdda479f LP |
256 | memset(&v4l2_event, 0, sizeof(v4l2_event)); |
257 | v4l2_event.type = UVC_EVENT_SETUP; | |
258 | memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req)); | |
dbe98b30 | 259 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
41837c35 BS |
264 | void uvc_function_setup_continue(struct uvc_device *uvc) |
265 | { | |
266 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
267 | ||
268 | usb_composite_setup_continue(cdev); | |
269 | } | |
270 | ||
cdda479f LP |
271 | static int |
272 | uvc_function_get_alt(struct usb_function *f, unsigned interface) | |
273 | { | |
274 | struct uvc_device *uvc = to_uvc(f); | |
275 | ||
276 | INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface); | |
277 | ||
278 | if (interface == uvc->control_intf) | |
279 | return 0; | |
280 | else if (interface != uvc->streaming_intf) | |
281 | return -EINVAL; | |
282 | else | |
d62bf8c1 | 283 | return uvc->video.ep->enabled ? 1 : 0; |
cdda479f LP |
284 | } |
285 | ||
286 | static int | |
287 | uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt) | |
288 | { | |
289 | struct uvc_device *uvc = to_uvc(f); | |
c92bae75 | 290 | struct usb_composite_dev *cdev = f->config->cdev; |
cdda479f LP |
291 | struct v4l2_event v4l2_event; |
292 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
fbcaba0e | 293 | int ret; |
cdda479f | 294 | |
c92bae75 | 295 | INFO(cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt); |
cdda479f LP |
296 | |
297 | if (interface == uvc->control_intf) { | |
298 | if (alt) | |
299 | return -EINVAL; | |
300 | ||
d62bf8c1 RB |
301 | INFO(cdev, "reset UVC Control\n"); |
302 | usb_ep_disable(uvc->control_ep); | |
62e37078 FB |
303 | |
304 | if (!uvc->control_ep->desc) | |
305 | if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep)) | |
306 | return -EINVAL; | |
307 | ||
308 | usb_ep_enable(uvc->control_ep); | |
62e37078 | 309 | |
cdda479f LP |
310 | if (uvc->state == UVC_STATE_DISCONNECTED) { |
311 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
312 | v4l2_event.type = UVC_EVENT_CONNECT; | |
c92bae75 | 313 | uvc_event->speed = cdev->gadget->speed; |
dbe98b30 | 314 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
315 | |
316 | uvc->state = UVC_STATE_CONNECTED; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | if (interface != uvc->streaming_intf) | |
323 | return -EINVAL; | |
324 | ||
325 | /* TODO | |
326 | if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep)) | |
327 | return alt ? -EINVAL : 0; | |
328 | */ | |
329 | ||
330 | switch (alt) { | |
331 | case 0: | |
332 | if (uvc->state != UVC_STATE_STREAMING) | |
333 | return 0; | |
334 | ||
d62bf8c1 | 335 | if (uvc->video.ep) |
cdda479f LP |
336 | usb_ep_disable(uvc->video.ep); |
337 | ||
338 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
339 | v4l2_event.type = UVC_EVENT_STREAMOFF; | |
dbe98b30 | 340 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
341 | |
342 | uvc->state = UVC_STATE_CONNECTED; | |
41837c35 | 343 | return 0; |
cdda479f LP |
344 | |
345 | case 1: | |
346 | if (uvc->state != UVC_STATE_CONNECTED) | |
347 | return 0; | |
348 | ||
c92bae75 FB |
349 | if (!uvc->video.ep) |
350 | return -EINVAL; | |
351 | ||
d62bf8c1 RB |
352 | INFO(cdev, "reset UVC\n"); |
353 | usb_ep_disable(uvc->video.ep); | |
cdda479f | 354 | |
c92bae75 FB |
355 | ret = config_ep_by_speed(f->config->cdev->gadget, |
356 | &(uvc->func), uvc->video.ep); | |
357 | if (ret) | |
358 | return ret; | |
359 | usb_ep_enable(uvc->video.ep); | |
c92bae75 | 360 | |
cdda479f LP |
361 | memset(&v4l2_event, 0, sizeof(v4l2_event)); |
362 | v4l2_event.type = UVC_EVENT_STREAMON; | |
dbe98b30 | 363 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
41837c35 | 364 | return USB_GADGET_DELAYED_STATUS; |
cdda479f LP |
365 | |
366 | default: | |
367 | return -EINVAL; | |
368 | } | |
cdda479f LP |
369 | } |
370 | ||
371 | static void | |
372 | uvc_function_disable(struct usb_function *f) | |
373 | { | |
374 | struct uvc_device *uvc = to_uvc(f); | |
375 | struct v4l2_event v4l2_event; | |
376 | ||
377 | INFO(f->config->cdev, "uvc_function_disable\n"); | |
378 | ||
379 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
380 | v4l2_event.type = UVC_EVENT_DISCONNECT; | |
dbe98b30 | 381 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
382 | |
383 | uvc->state = UVC_STATE_DISCONNECTED; | |
e3122f5f | 384 | |
d62bf8c1 RB |
385 | usb_ep_disable(uvc->video.ep); |
386 | usb_ep_disable(uvc->control_ep); | |
cdda479f LP |
387 | } |
388 | ||
389 | /* -------------------------------------------------------------------------- | |
390 | * Connection / disconnection | |
391 | */ | |
392 | ||
393 | void | |
394 | uvc_function_connect(struct uvc_device *uvc) | |
395 | { | |
396 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
397 | int ret; | |
398 | ||
399 | if ((ret = usb_function_activate(&uvc->func)) < 0) | |
400 | INFO(cdev, "UVC connect failed with %d\n", ret); | |
401 | } | |
402 | ||
403 | void | |
404 | uvc_function_disconnect(struct uvc_device *uvc) | |
405 | { | |
406 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
407 | int ret; | |
408 | ||
409 | if ((ret = usb_function_deactivate(&uvc->func)) < 0) | |
410 | INFO(cdev, "UVC disconnect failed with %d\n", ret); | |
411 | } | |
412 | ||
413 | /* -------------------------------------------------------------------------- | |
414 | * USB probe and disconnect | |
415 | */ | |
416 | ||
417 | static int | |
418 | uvc_register_video(struct uvc_device *uvc) | |
419 | { | |
420 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
cdda479f LP |
421 | |
422 | /* TODO reference counting. */ | |
dbe98b30 HV |
423 | uvc->vdev.v4l2_dev = &uvc->v4l2_dev; |
424 | uvc->vdev.fops = &uvc_v4l2_fops; | |
425 | uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops; | |
426 | uvc->vdev.release = video_device_release_empty; | |
427 | uvc->vdev.vfl_dir = VFL_DIR_TX; | |
428 | uvc->vdev.lock = &uvc->video.mutex; | |
429 | strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name)); | |
430 | ||
431 | video_set_drvdata(&uvc->vdev, uvc); | |
432 | ||
433 | return video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); | |
cdda479f LP |
434 | } |
435 | ||
436 | #define UVC_COPY_DESCRIPTOR(mem, dst, desc) \ | |
437 | do { \ | |
438 | memcpy(mem, desc, (desc)->bLength); \ | |
439 | *(dst)++ = mem; \ | |
440 | mem += (desc)->bLength; \ | |
441 | } while (0); | |
442 | ||
443 | #define UVC_COPY_DESCRIPTORS(mem, dst, src) \ | |
444 | do { \ | |
445 | const struct usb_descriptor_header * const *__src; \ | |
446 | for (__src = src; *__src; ++__src) { \ | |
447 | memcpy(mem, *__src, (*__src)->bLength); \ | |
448 | *dst++ = mem; \ | |
449 | mem += (*__src)->bLength; \ | |
450 | } \ | |
451 | } while (0) | |
452 | ||
6d11ed76 | 453 | static struct usb_descriptor_header ** |
cdda479f LP |
454 | uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed) |
455 | { | |
456 | struct uvc_input_header_descriptor *uvc_streaming_header; | |
457 | struct uvc_header_descriptor *uvc_control_header; | |
fbcaba0e | 458 | const struct uvc_descriptor_header * const *uvc_control_desc; |
cdda479f LP |
459 | const struct uvc_descriptor_header * const *uvc_streaming_cls; |
460 | const struct usb_descriptor_header * const *uvc_streaming_std; | |
461 | const struct usb_descriptor_header * const *src; | |
462 | struct usb_descriptor_header **dst; | |
463 | struct usb_descriptor_header **hdr; | |
464 | unsigned int control_size; | |
465 | unsigned int streaming_size; | |
466 | unsigned int n_desc; | |
467 | unsigned int bytes; | |
468 | void *mem; | |
469 | ||
fbcaba0e BS |
470 | switch (speed) { |
471 | case USB_SPEED_SUPER: | |
472 | uvc_control_desc = uvc->desc.ss_control; | |
473 | uvc_streaming_cls = uvc->desc.ss_streaming; | |
474 | uvc_streaming_std = uvc_ss_streaming; | |
fbcaba0e BS |
475 | break; |
476 | ||
477 | case USB_SPEED_HIGH: | |
478 | uvc_control_desc = uvc->desc.fs_control; | |
479 | uvc_streaming_cls = uvc->desc.hs_streaming; | |
480 | uvc_streaming_std = uvc_hs_streaming; | |
fbcaba0e BS |
481 | break; |
482 | ||
483 | case USB_SPEED_FULL: | |
484 | default: | |
485 | uvc_control_desc = uvc->desc.fs_control; | |
486 | uvc_streaming_cls = uvc->desc.fs_streaming; | |
487 | uvc_streaming_std = uvc_fs_streaming; | |
fbcaba0e BS |
488 | break; |
489 | } | |
cdda479f | 490 | |
6c25955e AP |
491 | if (!uvc_control_desc || !uvc_streaming_cls) |
492 | return ERR_PTR(-ENODEV); | |
493 | ||
cdda479f LP |
494 | /* Descriptors layout |
495 | * | |
496 | * uvc_iad | |
497 | * uvc_control_intf | |
498 | * Class-specific UVC control descriptors | |
499 | * uvc_control_ep | |
500 | * uvc_control_cs_ep | |
48eee0b4 | 501 | * uvc_ss_control_comp (for SS only) |
cdda479f LP |
502 | * uvc_streaming_intf_alt0 |
503 | * Class-specific UVC streaming descriptors | |
504 | * uvc_{fs|hs}_streaming | |
505 | */ | |
506 | ||
507 | /* Count descriptors and compute their size. */ | |
508 | control_size = 0; | |
509 | streaming_size = 0; | |
510 | bytes = uvc_iad.bLength + uvc_control_intf.bLength | |
48eee0b4 | 511 | + uvc_control_ep.bLength + uvc_control_cs_ep.bLength |
cdda479f | 512 | + uvc_streaming_intf_alt0.bLength; |
cdda479f | 513 | |
fbcaba0e BS |
514 | if (speed == USB_SPEED_SUPER) { |
515 | bytes += uvc_ss_control_comp.bLength; | |
516 | n_desc = 6; | |
517 | } else { | |
518 | n_desc = 5; | |
519 | } | |
520 | ||
521 | for (src = (const struct usb_descriptor_header **)uvc_control_desc; | |
ee6a4d87 | 522 | *src; ++src) { |
cdda479f LP |
523 | control_size += (*src)->bLength; |
524 | bytes += (*src)->bLength; | |
525 | n_desc++; | |
526 | } | |
fbcaba0e | 527 | for (src = (const struct usb_descriptor_header **)uvc_streaming_cls; |
ee6a4d87 | 528 | *src; ++src) { |
cdda479f LP |
529 | streaming_size += (*src)->bLength; |
530 | bytes += (*src)->bLength; | |
531 | n_desc++; | |
532 | } | |
533 | for (src = uvc_streaming_std; *src; ++src) { | |
534 | bytes += (*src)->bLength; | |
535 | n_desc++; | |
536 | } | |
537 | ||
538 | mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL); | |
539 | if (mem == NULL) | |
540 | return NULL; | |
541 | ||
542 | hdr = mem; | |
543 | dst = mem; | |
544 | mem += (n_desc + 1) * sizeof(*src); | |
545 | ||
546 | /* Copy the descriptors. */ | |
547 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad); | |
548 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf); | |
549 | ||
550 | uvc_control_header = mem; | |
551 | UVC_COPY_DESCRIPTORS(mem, dst, | |
fbcaba0e | 552 | (const struct usb_descriptor_header **)uvc_control_desc); |
cdda479f LP |
553 | uvc_control_header->wTotalLength = cpu_to_le16(control_size); |
554 | uvc_control_header->bInCollection = 1; | |
555 | uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf; | |
556 | ||
48eee0b4 | 557 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep); |
fbcaba0e BS |
558 | if (speed == USB_SPEED_SUPER) |
559 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp); | |
560 | ||
cdda479f LP |
561 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep); |
562 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0); | |
563 | ||
564 | uvc_streaming_header = mem; | |
565 | UVC_COPY_DESCRIPTORS(mem, dst, | |
566 | (const struct usb_descriptor_header**)uvc_streaming_cls); | |
567 | uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size); | |
0485ec0d | 568 | uvc_streaming_header->bEndpointAddress = uvc->video.ep->address; |
cdda479f LP |
569 | |
570 | UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std); | |
571 | ||
572 | *dst = NULL; | |
573 | return hdr; | |
574 | } | |
575 | ||
6d11ed76 | 576 | static int |
cdda479f LP |
577 | uvc_function_bind(struct usb_configuration *c, struct usb_function *f) |
578 | { | |
579 | struct usb_composite_dev *cdev = c->cdev; | |
580 | struct uvc_device *uvc = to_uvc(f); | |
13443799 | 581 | struct usb_string *us; |
20777dde LP |
582 | unsigned int max_packet_mult; |
583 | unsigned int max_packet_size; | |
cdda479f | 584 | struct usb_ep *ep; |
6d11ed76 | 585 | struct f_uvc_opts *opts; |
cdda479f LP |
586 | int ret = -EINVAL; |
587 | ||
588 | INFO(cdev, "uvc_function_bind\n"); | |
589 | ||
bbea6de1 | 590 | opts = fi_to_f_uvc_opts(f->fi); |
6d11ed76 AP |
591 | /* Sanity check the streaming endpoint module parameters. |
592 | */ | |
593 | opts->streaming_interval = clamp(opts->streaming_interval, 1U, 16U); | |
594 | opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, 1U, 3072U); | |
595 | opts->streaming_maxburst = min(opts->streaming_maxburst, 15U); | |
596 | ||
16bb05d9 RQ |
597 | /* For SS, wMaxPacketSize has to be 1024 if bMaxBurst is not 0 */ |
598 | if (opts->streaming_maxburst && | |
599 | (opts->streaming_maxpacket % 1024) != 0) { | |
600 | opts->streaming_maxpacket = roundup(opts->streaming_maxpacket, 1024); | |
601 | INFO(cdev, "overriding streaming_maxpacket to %d\n", | |
602 | opts->streaming_maxpacket); | |
603 | } | |
604 | ||
6d11ed76 AP |
605 | /* Fill in the FS/HS/SS Video Streaming specific descriptors from the |
606 | * module parameters. | |
607 | * | |
608 | * NOTE: We assume that the user knows what they are doing and won't | |
609 | * give parameters that their UDC doesn't support. | |
610 | */ | |
611 | if (opts->streaming_maxpacket <= 1024) { | |
612 | max_packet_mult = 1; | |
613 | max_packet_size = opts->streaming_maxpacket; | |
614 | } else if (opts->streaming_maxpacket <= 2048) { | |
615 | max_packet_mult = 2; | |
616 | max_packet_size = opts->streaming_maxpacket / 2; | |
617 | } else { | |
618 | max_packet_mult = 3; | |
619 | max_packet_size = opts->streaming_maxpacket / 3; | |
620 | } | |
621 | ||
622 | uvc_fs_streaming_ep.wMaxPacketSize = | |
e102609f | 623 | cpu_to_le16(min(opts->streaming_maxpacket, 1023U)); |
6d11ed76 AP |
624 | uvc_fs_streaming_ep.bInterval = opts->streaming_interval; |
625 | ||
e102609f LP |
626 | uvc_hs_streaming_ep.wMaxPacketSize = |
627 | cpu_to_le16(max_packet_size | ((max_packet_mult - 1) << 11)); | |
6d11ed76 AP |
628 | uvc_hs_streaming_ep.bInterval = opts->streaming_interval; |
629 | ||
e102609f | 630 | uvc_ss_streaming_ep.wMaxPacketSize = cpu_to_le16(max_packet_size); |
6d11ed76 AP |
631 | uvc_ss_streaming_ep.bInterval = opts->streaming_interval; |
632 | uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1; | |
633 | uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst; | |
634 | uvc_ss_streaming_comp.wBytesPerInterval = | |
e102609f | 635 | cpu_to_le16(max_packet_size * max_packet_mult * |
09424c50 | 636 | (opts->streaming_maxburst + 1)); |
20777dde | 637 | |
cdda479f | 638 | /* Allocate endpoints. */ |
48eee0b4 | 639 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); |
cdda479f LP |
640 | if (!ep) { |
641 | INFO(cdev, "Unable to allocate control EP\n"); | |
642 | goto error; | |
643 | } | |
644 | uvc->control_ep = ep; | |
cdda479f | 645 | |
0485ec0d LP |
646 | if (gadget_is_superspeed(c->cdev->gadget)) |
647 | ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep, | |
648 | &uvc_ss_streaming_comp); | |
649 | else if (gadget_is_dualspeed(cdev->gadget)) | |
650 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep); | |
651 | else | |
652 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep); | |
653 | ||
cdda479f LP |
654 | if (!ep) { |
655 | INFO(cdev, "Unable to allocate streaming EP\n"); | |
656 | goto error; | |
657 | } | |
658 | uvc->video.ep = ep; | |
cdda479f | 659 | |
0485ec0d LP |
660 | uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address; |
661 | uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address; | |
662 | uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address; | |
20777dde | 663 | |
13443799 AP |
664 | us = usb_gstrings_attach(cdev, uvc_function_strings, |
665 | ARRAY_SIZE(uvc_en_us_strings)); | |
666 | if (IS_ERR(us)) { | |
667 | ret = PTR_ERR(us); | |
668 | goto error; | |
6d11ed76 | 669 | } |
13443799 AP |
670 | uvc_iad.iFunction = us[UVC_STRING_CONTROL_IDX].id; |
671 | uvc_control_intf.iInterface = us[UVC_STRING_CONTROL_IDX].id; | |
672 | ret = us[UVC_STRING_STREAMING_IDX].id; | |
673 | uvc_streaming_intf_alt0.iInterface = ret; | |
674 | uvc_streaming_intf_alt1.iInterface = ret; | |
6d11ed76 | 675 | |
cdda479f LP |
676 | /* Allocate interface IDs. */ |
677 | if ((ret = usb_interface_id(c, f)) < 0) | |
678 | goto error; | |
679 | uvc_iad.bFirstInterface = ret; | |
680 | uvc_control_intf.bInterfaceNumber = ret; | |
681 | uvc->control_intf = ret; | |
682 | ||
683 | if ((ret = usb_interface_id(c, f)) < 0) | |
684 | goto error; | |
685 | uvc_streaming_intf_alt0.bInterfaceNumber = ret; | |
686 | uvc_streaming_intf_alt1.bInterfaceNumber = ret; | |
687 | uvc->streaming_intf = ret; | |
688 | ||
10287bae SAS |
689 | /* Copy descriptors */ |
690 | f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL); | |
6c25955e AP |
691 | if (IS_ERR(f->fs_descriptors)) { |
692 | ret = PTR_ERR(f->fs_descriptors); | |
693 | f->fs_descriptors = NULL; | |
694 | goto error; | |
695 | } | |
696 | if (gadget_is_dualspeed(cdev->gadget)) { | |
10287bae | 697 | f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH); |
6c25955e AP |
698 | if (IS_ERR(f->hs_descriptors)) { |
699 | ret = PTR_ERR(f->hs_descriptors); | |
700 | f->hs_descriptors = NULL; | |
701 | goto error; | |
702 | } | |
703 | } | |
704 | if (gadget_is_superspeed(c->cdev->gadget)) { | |
fbcaba0e | 705 | f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER); |
6c25955e AP |
706 | if (IS_ERR(f->ss_descriptors)) { |
707 | ret = PTR_ERR(f->ss_descriptors); | |
708 | f->ss_descriptors = NULL; | |
709 | goto error; | |
710 | } | |
711 | } | |
cdda479f LP |
712 | |
713 | /* Preallocate control endpoint request. */ | |
714 | uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL); | |
715 | uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL); | |
716 | if (uvc->control_req == NULL || uvc->control_buf == NULL) { | |
717 | ret = -ENOMEM; | |
718 | goto error; | |
719 | } | |
720 | ||
721 | uvc->control_req->buf = uvc->control_buf; | |
722 | uvc->control_req->complete = uvc_function_ep0_complete; | |
723 | uvc->control_req->context = uvc; | |
724 | ||
b60f9aa1 HV |
725 | if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) { |
726 | printk(KERN_INFO "v4l2_device_register failed\n"); | |
727 | goto error; | |
728 | } | |
729 | ||
cdda479f | 730 | /* Initialise video. */ |
7ea95b11 | 731 | ret = uvcg_video_init(&uvc->video); |
cdda479f LP |
732 | if (ret < 0) |
733 | goto error; | |
734 | ||
735 | /* Register a V4L2 device. */ | |
736 | ret = uvc_register_video(uvc); | |
737 | if (ret < 0) { | |
738 | printk(KERN_INFO "Unable to register video device\n"); | |
739 | goto error; | |
740 | } | |
741 | ||
742 | return 0; | |
743 | ||
744 | error: | |
b60f9aa1 | 745 | v4l2_device_unregister(&uvc->v4l2_dev); |
0f9df939 | 746 | |
e7379857 | 747 | if (uvc->control_req) |
0f9df939 | 748 | usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); |
e7379857 | 749 | kfree(uvc->control_buf); |
0f9df939 | 750 | |
10287bae | 751 | usb_free_all_descriptors(f); |
cdda479f LP |
752 | return ret; |
753 | } | |
754 | ||
755 | /* -------------------------------------------------------------------------- | |
756 | * USB gadget function | |
757 | */ | |
758 | ||
6d11ed76 AP |
759 | static void uvc_free_inst(struct usb_function_instance *f) |
760 | { | |
bbea6de1 | 761 | struct f_uvc_opts *opts = fi_to_f_uvc_opts(f); |
6d11ed76 | 762 | |
46919a23 | 763 | mutex_destroy(&opts->lock); |
6d11ed76 AP |
764 | kfree(opts); |
765 | } | |
766 | ||
767 | static struct usb_function_instance *uvc_alloc_inst(void) | |
768 | { | |
769 | struct f_uvc_opts *opts; | |
46919a23 AP |
770 | struct uvc_camera_terminal_descriptor *cd; |
771 | struct uvc_processing_unit_descriptor *pd; | |
772 | struct uvc_output_terminal_descriptor *od; | |
773 | struct uvc_color_matching_descriptor *md; | |
774 | struct uvc_descriptor_header **ctl_cls; | |
6d11ed76 AP |
775 | |
776 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
777 | if (!opts) | |
778 | return ERR_PTR(-ENOMEM); | |
779 | opts->func_inst.free_func_inst = uvc_free_inst; | |
46919a23 AP |
780 | mutex_init(&opts->lock); |
781 | ||
782 | cd = &opts->uvc_camera_terminal; | |
783 | cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3); | |
784 | cd->bDescriptorType = USB_DT_CS_INTERFACE; | |
785 | cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL; | |
786 | cd->bTerminalID = 1; | |
787 | cd->wTerminalType = cpu_to_le16(0x0201); | |
788 | cd->bAssocTerminal = 0; | |
789 | cd->iTerminal = 0; | |
790 | cd->wObjectiveFocalLengthMin = cpu_to_le16(0); | |
791 | cd->wObjectiveFocalLengthMax = cpu_to_le16(0); | |
792 | cd->wOcularFocalLength = cpu_to_le16(0); | |
793 | cd->bControlSize = 3; | |
794 | cd->bmControls[0] = 2; | |
795 | cd->bmControls[1] = 0; | |
796 | cd->bmControls[2] = 0; | |
797 | ||
798 | pd = &opts->uvc_processing; | |
799 | pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2); | |
800 | pd->bDescriptorType = USB_DT_CS_INTERFACE; | |
801 | pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT; | |
802 | pd->bUnitID = 2; | |
803 | pd->bSourceID = 1; | |
804 | pd->wMaxMultiplier = cpu_to_le16(16*1024); | |
805 | pd->bControlSize = 2; | |
806 | pd->bmControls[0] = 1; | |
807 | pd->bmControls[1] = 0; | |
808 | pd->iProcessing = 0; | |
809 | ||
810 | od = &opts->uvc_output_terminal; | |
811 | od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE; | |
812 | od->bDescriptorType = USB_DT_CS_INTERFACE; | |
813 | od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL; | |
814 | od->bTerminalID = 3; | |
815 | od->wTerminalType = cpu_to_le16(0x0101); | |
816 | od->bAssocTerminal = 0; | |
817 | od->bSourceID = 2; | |
818 | od->iTerminal = 0; | |
819 | ||
820 | md = &opts->uvc_color_matching; | |
821 | md->bLength = UVC_DT_COLOR_MATCHING_SIZE; | |
822 | md->bDescriptorType = USB_DT_CS_INTERFACE; | |
823 | md->bDescriptorSubType = UVC_VS_COLORFORMAT; | |
824 | md->bColorPrimaries = 1; | |
825 | md->bTransferCharacteristics = 1; | |
826 | md->bMatrixCoefficients = 4; | |
827 | ||
828 | /* Prepare fs control class descriptors for configfs-based gadgets */ | |
829 | ctl_cls = opts->uvc_fs_control_cls; | |
830 | ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ | |
831 | ctl_cls[1] = (struct uvc_descriptor_header *)cd; | |
832 | ctl_cls[2] = (struct uvc_descriptor_header *)pd; | |
833 | ctl_cls[3] = (struct uvc_descriptor_header *)od; | |
834 | ctl_cls[4] = NULL; /* NULL-terminate */ | |
835 | opts->fs_control = | |
836 | (const struct uvc_descriptor_header * const *)ctl_cls; | |
837 | ||
838 | /* Prepare hs control class descriptors for configfs-based gadgets */ | |
839 | ctl_cls = opts->uvc_ss_control_cls; | |
840 | ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ | |
841 | ctl_cls[1] = (struct uvc_descriptor_header *)cd; | |
842 | ctl_cls[2] = (struct uvc_descriptor_header *)pd; | |
843 | ctl_cls[3] = (struct uvc_descriptor_header *)od; | |
844 | ctl_cls[4] = NULL; /* NULL-terminate */ | |
845 | opts->ss_control = | |
846 | (const struct uvc_descriptor_header * const *)ctl_cls; | |
847 | ||
848 | opts->streaming_interval = 1; | |
849 | opts->streaming_maxpacket = 1024; | |
850 | ||
851 | uvcg_attach_configfs(opts); | |
6d11ed76 AP |
852 | return &opts->func_inst; |
853 | } | |
854 | ||
855 | static void uvc_free(struct usb_function *f) | |
856 | { | |
857 | struct uvc_device *uvc = to_uvc(f); | |
46919a23 AP |
858 | struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts, |
859 | func_inst); | |
860 | --opts->refcnt; | |
6d11ed76 AP |
861 | kfree(uvc); |
862 | } | |
863 | ||
864 | static void uvc_unbind(struct usb_configuration *c, struct usb_function *f) | |
865 | { | |
866 | struct usb_composite_dev *cdev = c->cdev; | |
867 | struct uvc_device *uvc = to_uvc(f); | |
868 | ||
869 | INFO(cdev, "%s\n", __func__); | |
870 | ||
dbe98b30 | 871 | video_unregister_device(&uvc->vdev); |
6d11ed76 | 872 | v4l2_device_unregister(&uvc->v4l2_dev); |
6d11ed76 | 873 | |
6d11ed76 AP |
874 | usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); |
875 | kfree(uvc->control_buf); | |
876 | ||
877 | usb_free_all_descriptors(f); | |
878 | } | |
879 | ||
4a6698b8 | 880 | static struct usb_function *uvc_alloc(struct usb_function_instance *fi) |
6d11ed76 AP |
881 | { |
882 | struct uvc_device *uvc; | |
883 | struct f_uvc_opts *opts; | |
46919a23 | 884 | struct uvc_descriptor_header **strm_cls; |
6d11ed76 AP |
885 | |
886 | uvc = kzalloc(sizeof(*uvc), GFP_KERNEL); | |
887 | if (uvc == NULL) | |
888 | return ERR_PTR(-ENOMEM); | |
889 | ||
d8e96c4b | 890 | mutex_init(&uvc->video.mutex); |
6d11ed76 | 891 | uvc->state = UVC_STATE_DISCONNECTED; |
bbea6de1 | 892 | opts = fi_to_f_uvc_opts(fi); |
6d11ed76 | 893 | |
46919a23 AP |
894 | mutex_lock(&opts->lock); |
895 | if (opts->uvc_fs_streaming_cls) { | |
896 | strm_cls = opts->uvc_fs_streaming_cls; | |
897 | opts->fs_streaming = | |
898 | (const struct uvc_descriptor_header * const *)strm_cls; | |
899 | } | |
900 | if (opts->uvc_hs_streaming_cls) { | |
901 | strm_cls = opts->uvc_hs_streaming_cls; | |
902 | opts->hs_streaming = | |
903 | (const struct uvc_descriptor_header * const *)strm_cls; | |
904 | } | |
905 | if (opts->uvc_ss_streaming_cls) { | |
906 | strm_cls = opts->uvc_ss_streaming_cls; | |
907 | opts->ss_streaming = | |
908 | (const struct uvc_descriptor_header * const *)strm_cls; | |
909 | } | |
910 | ||
6d11ed76 AP |
911 | uvc->desc.fs_control = opts->fs_control; |
912 | uvc->desc.ss_control = opts->ss_control; | |
913 | uvc->desc.fs_streaming = opts->fs_streaming; | |
914 | uvc->desc.hs_streaming = opts->hs_streaming; | |
915 | uvc->desc.ss_streaming = opts->ss_streaming; | |
46919a23 AP |
916 | ++opts->refcnt; |
917 | mutex_unlock(&opts->lock); | |
6d11ed76 AP |
918 | |
919 | /* Register the function. */ | |
920 | uvc->func.name = "uvc"; | |
6d11ed76 AP |
921 | uvc->func.bind = uvc_function_bind; |
922 | uvc->func.unbind = uvc_unbind; | |
923 | uvc->func.get_alt = uvc_function_get_alt; | |
924 | uvc->func.set_alt = uvc_function_set_alt; | |
925 | uvc->func.disable = uvc_function_disable; | |
926 | uvc->func.setup = uvc_function_setup; | |
927 | uvc->func.free_func = uvc_free; | |
f277bf27 | 928 | uvc->func.bind_deactivated = true; |
6d11ed76 AP |
929 | |
930 | return &uvc->func; | |
931 | } | |
932 | ||
933 | DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc); | |
934 | MODULE_LICENSE("GPL"); | |
935 | MODULE_AUTHOR("Laurent Pinchart"); |