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13#include <linux/kernel.h>
14#include <linux/module.h>
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>
20#include <linux/string.h>
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
30#include "u_uvc.h"
31#include "uvc.h"
32#include "uvc_configfs.h"
33#include "uvc_v4l2.h"
34#include "uvc_video.h"
35
36unsigned int uvc_gadget_trace_param;
37
38
39
40
41
42
43
44#define UVC_STRING_CONTROL_IDX 0
45#define UVC_STRING_STREAMING_IDX 1
46
47static struct usb_string uvc_en_us_strings[] = {
48 [UVC_STRING_CONTROL_IDX].s = "UVC Camera",
49 [UVC_STRING_STREAMING_IDX].s = "Video Streaming",
50 { }
51};
52
53static struct usb_gadget_strings uvc_stringtab = {
54 .language = 0x0409,
55 .strings = uvc_en_us_strings,
56};
57
58static 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
66#define UVC_STATUS_MAX_PACKET_SIZE 16
67
68static struct usb_interface_assoc_descriptor uvc_iad = {
69 .bLength = sizeof(uvc_iad),
70 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
71 .bFirstInterface = 0,
72 .bInterfaceCount = 2,
73 .bFunctionClass = USB_CLASS_VIDEO,
74 .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION,
75 .bFunctionProtocol = 0x00,
76 .iFunction = 0,
77};
78
79static struct usb_interface_descriptor uvc_control_intf = {
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,
86 .bInterfaceSubClass = UVC_SC_VIDEOCONTROL,
87 .bInterfaceProtocol = 0x00,
88 .iInterface = 0,
89};
90
91static struct usb_endpoint_descriptor uvc_control_ep = {
92 .bLength = USB_DT_ENDPOINT_SIZE,
93 .bDescriptorType = USB_DT_ENDPOINT,
94 .bEndpointAddress = USB_DIR_IN,
95 .bmAttributes = USB_ENDPOINT_XFER_INT,
96 .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
97 .bInterval = 8,
98};
99
100static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = {
101 .bLength = sizeof(uvc_ss_control_comp),
102 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
103
104 .bMaxBurst = 0,
105 .bmAttributes = 0,
106 .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
107};
108
109static struct uvc_control_endpoint_descriptor uvc_control_cs_ep = {
110 .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
111 .bDescriptorType = USB_DT_CS_ENDPOINT,
112 .bDescriptorSubType = UVC_EP_INTERRUPT,
113 .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
114};
115
116static struct usb_interface_descriptor uvc_streaming_intf_alt0 = {
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,
123 .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
124 .bInterfaceProtocol = 0x00,
125 .iInterface = 0,
126};
127
128static struct usb_interface_descriptor uvc_streaming_intf_alt1 = {
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,
135 .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
136 .bInterfaceProtocol = 0x00,
137 .iInterface = 0,
138};
139
140static struct usb_endpoint_descriptor uvc_fs_streaming_ep = {
141 .bLength = USB_DT_ENDPOINT_SIZE,
142 .bDescriptorType = USB_DT_ENDPOINT,
143 .bEndpointAddress = USB_DIR_IN,
144 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
145 | USB_ENDPOINT_XFER_ISOC,
146
147
148
149};
150
151static struct usb_endpoint_descriptor uvc_hs_streaming_ep = {
152 .bLength = USB_DT_ENDPOINT_SIZE,
153 .bDescriptorType = USB_DT_ENDPOINT,
154 .bEndpointAddress = USB_DIR_IN,
155 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
156 | USB_ENDPOINT_XFER_ISOC,
157
158
159
160};
161
162static struct usb_endpoint_descriptor uvc_ss_streaming_ep = {
163 .bLength = USB_DT_ENDPOINT_SIZE,
164 .bDescriptorType = USB_DT_ENDPOINT,
165
166 .bEndpointAddress = USB_DIR_IN,
167 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
168 | USB_ENDPOINT_XFER_ISOC,
169
170
171
172};
173
174static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = {
175 .bLength = sizeof(uvc_ss_streaming_comp),
176 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
177
178
179
180};
181
182static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
183 (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
184 (struct usb_descriptor_header *) &uvc_fs_streaming_ep,
185 NULL,
186};
187
188static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
189 (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
190 (struct usb_descriptor_header *) &uvc_hs_streaming_ep,
191 NULL,
192};
193
194static 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,
198 NULL,
199};
200
201void uvc_set_trace_param(unsigned int trace)
202{
203 uvc_gadget_trace_param = trace;
204}
205EXPORT_SYMBOL(uvc_set_trace_param);
206
207
208
209
210
211static void
212uvc_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);
225 v4l2_event_queue(uvc->vdev, &v4l2_event);
226 }
227}
228
229static int
230uvc_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
237
238
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
247 if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
248 return -EINVAL;
249
250
251
252
253 uvc->event_setup_out = !(ctrl->bRequestType & USB_DIR_IN);
254 uvc->event_length = le16_to_cpu(ctrl->wLength);
255
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));
259 v4l2_event_queue(uvc->vdev, &v4l2_event);
260
261 return 0;
262}
263
264void 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
271static int
272uvc_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
283 return uvc->video.ep->driver_data ? 1 : 0;
284}
285
286static int
287uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
288{
289 struct uvc_device *uvc = to_uvc(f);
290 struct usb_composite_dev *cdev = f->config->cdev;
291 struct v4l2_event v4l2_event;
292 struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
293 int ret;
294
295 INFO(cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
296
297 if (interface == uvc->control_intf) {
298 if (alt)
299 return -EINVAL;
300
301 if (uvc->control_ep->driver_data) {
302 INFO(cdev, "reset UVC Control\n");
303 usb_ep_disable(uvc->control_ep);
304 uvc->control_ep->driver_data = NULL;
305 }
306
307 if (!uvc->control_ep->desc)
308 if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep))
309 return -EINVAL;
310
311 usb_ep_enable(uvc->control_ep);
312 uvc->control_ep->driver_data = uvc;
313
314 if (uvc->state == UVC_STATE_DISCONNECTED) {
315 memset(&v4l2_event, 0, sizeof(v4l2_event));
316 v4l2_event.type = UVC_EVENT_CONNECT;
317 uvc_event->speed = cdev->gadget->speed;
318 v4l2_event_queue(uvc->vdev, &v4l2_event);
319
320 uvc->state = UVC_STATE_CONNECTED;
321 }
322
323 return 0;
324 }
325
326 if (interface != uvc->streaming_intf)
327 return -EINVAL;
328
329
330
331
332
333
334 switch (alt) {
335 case 0:
336 if (uvc->state != UVC_STATE_STREAMING)
337 return 0;
338
339 if (uvc->video.ep) {
340 usb_ep_disable(uvc->video.ep);
341 uvc->video.ep->driver_data = NULL;
342 }
343
344 memset(&v4l2_event, 0, sizeof(v4l2_event));
345 v4l2_event.type = UVC_EVENT_STREAMOFF;
346 v4l2_event_queue(uvc->vdev, &v4l2_event);
347
348 uvc->state = UVC_STATE_CONNECTED;
349 return 0;
350
351 case 1:
352 if (uvc->state != UVC_STATE_CONNECTED)
353 return 0;
354
355 if (!uvc->video.ep)
356 return -EINVAL;
357
358 if (uvc->video.ep->driver_data) {
359 INFO(cdev, "reset UVC\n");
360 usb_ep_disable(uvc->video.ep);
361 uvc->video.ep->driver_data = NULL;
362 }
363
364 ret = config_ep_by_speed(f->config->cdev->gadget,
365 &(uvc->func), uvc->video.ep);
366 if (ret)
367 return ret;
368 usb_ep_enable(uvc->video.ep);
369 uvc->video.ep->driver_data = uvc;
370
371 memset(&v4l2_event, 0, sizeof(v4l2_event));
372 v4l2_event.type = UVC_EVENT_STREAMON;
373 v4l2_event_queue(uvc->vdev, &v4l2_event);
374 return USB_GADGET_DELAYED_STATUS;
375
376 default:
377 return -EINVAL;
378 }
379}
380
381static void
382uvc_function_disable(struct usb_function *f)
383{
384 struct uvc_device *uvc = to_uvc(f);
385 struct v4l2_event v4l2_event;
386
387 INFO(f->config->cdev, "uvc_function_disable\n");
388
389 memset(&v4l2_event, 0, sizeof(v4l2_event));
390 v4l2_event.type = UVC_EVENT_DISCONNECT;
391 v4l2_event_queue(uvc->vdev, &v4l2_event);
392
393 uvc->state = UVC_STATE_DISCONNECTED;
394
395 if (uvc->video.ep->driver_data) {
396 usb_ep_disable(uvc->video.ep);
397 uvc->video.ep->driver_data = NULL;
398 }
399
400 if (uvc->control_ep->driver_data) {
401 usb_ep_disable(uvc->control_ep);
402 uvc->control_ep->driver_data = NULL;
403 }
404}
405
406
407
408
409
410void
411uvc_function_connect(struct uvc_device *uvc)
412{
413 struct usb_composite_dev *cdev = uvc->func.config->cdev;
414 int ret;
415
416 if ((ret = usb_function_activate(&uvc->func)) < 0)
417 INFO(cdev, "UVC connect failed with %d\n", ret);
418}
419
420void
421uvc_function_disconnect(struct uvc_device *uvc)
422{
423 struct usb_composite_dev *cdev = uvc->func.config->cdev;
424 int ret;
425
426 if ((ret = usb_function_deactivate(&uvc->func)) < 0)
427 INFO(cdev, "UVC disconnect failed with %d\n", ret);
428}
429
430
431
432
433
434static int
435uvc_register_video(struct uvc_device *uvc)
436{
437 struct usb_composite_dev *cdev = uvc->func.config->cdev;
438 struct video_device *video;
439
440
441 video = video_device_alloc();
442 if (video == NULL)
443 return -ENOMEM;
444
445 video->v4l2_dev = &uvc->v4l2_dev;
446 video->fops = &uvc_v4l2_fops;
447 video->ioctl_ops = &uvc_v4l2_ioctl_ops;
448 video->release = video_device_release;
449 video->vfl_dir = VFL_DIR_TX;
450 strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
451
452 uvc->vdev = video;
453 video_set_drvdata(video, uvc);
454
455 return video_register_device(video, VFL_TYPE_GRABBER, -1);
456}
457
458#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
459 do { \
460 memcpy(mem, desc, (desc)->bLength); \
461 *(dst)++ = mem; \
462 mem += (desc)->bLength; \
463 } while (0);
464
465#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
466 do { \
467 const struct usb_descriptor_header * const *__src; \
468 for (__src = src; *__src; ++__src) { \
469 memcpy(mem, *__src, (*__src)->bLength); \
470 *dst++ = mem; \
471 mem += (*__src)->bLength; \
472 } \
473 } while (0)
474
475static struct usb_descriptor_header **
476uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
477{
478 struct uvc_input_header_descriptor *uvc_streaming_header;
479 struct uvc_header_descriptor *uvc_control_header;
480 const struct uvc_descriptor_header * const *uvc_control_desc;
481 const struct uvc_descriptor_header * const *uvc_streaming_cls;
482 const struct usb_descriptor_header * const *uvc_streaming_std;
483 const struct usb_descriptor_header * const *src;
484 struct usb_descriptor_header **dst;
485 struct usb_descriptor_header **hdr;
486 unsigned int control_size;
487 unsigned int streaming_size;
488 unsigned int n_desc;
489 unsigned int bytes;
490 void *mem;
491
492 switch (speed) {
493 case USB_SPEED_SUPER:
494 uvc_control_desc = uvc->desc.ss_control;
495 uvc_streaming_cls = uvc->desc.ss_streaming;
496 uvc_streaming_std = uvc_ss_streaming;
497 break;
498
499 case USB_SPEED_HIGH:
500 uvc_control_desc = uvc->desc.fs_control;
501 uvc_streaming_cls = uvc->desc.hs_streaming;
502 uvc_streaming_std = uvc_hs_streaming;
503 break;
504
505 case USB_SPEED_FULL:
506 default:
507 uvc_control_desc = uvc->desc.fs_control;
508 uvc_streaming_cls = uvc->desc.fs_streaming;
509 uvc_streaming_std = uvc_fs_streaming;
510 break;
511 }
512
513 if (!uvc_control_desc || !uvc_streaming_cls)
514 return ERR_PTR(-ENODEV);
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530 control_size = 0;
531 streaming_size = 0;
532 bytes = uvc_iad.bLength + uvc_control_intf.bLength
533 + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
534 + uvc_streaming_intf_alt0.bLength;
535
536 if (speed == USB_SPEED_SUPER) {
537 bytes += uvc_ss_control_comp.bLength;
538 n_desc = 6;
539 } else {
540 n_desc = 5;
541 }
542
543 for (src = (const struct usb_descriptor_header **)uvc_control_desc;
544 *src; ++src) {
545 control_size += (*src)->bLength;
546 bytes += (*src)->bLength;
547 n_desc++;
548 }
549 for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
550 *src; ++src) {
551 streaming_size += (*src)->bLength;
552 bytes += (*src)->bLength;
553 n_desc++;
554 }
555 for (src = uvc_streaming_std; *src; ++src) {
556 bytes += (*src)->bLength;
557 n_desc++;
558 }
559
560 mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
561 if (mem == NULL)
562 return NULL;
563
564 hdr = mem;
565 dst = mem;
566 mem += (n_desc + 1) * sizeof(*src);
567
568
569 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
570 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
571
572 uvc_control_header = mem;
573 UVC_COPY_DESCRIPTORS(mem, dst,
574 (const struct usb_descriptor_header **)uvc_control_desc);
575 uvc_control_header->wTotalLength = cpu_to_le16(control_size);
576 uvc_control_header->bInCollection = 1;
577 uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
578
579 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
580 if (speed == USB_SPEED_SUPER)
581 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
582
583 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
584 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
585
586 uvc_streaming_header = mem;
587 UVC_COPY_DESCRIPTORS(mem, dst,
588 (const struct usb_descriptor_header**)uvc_streaming_cls);
589 uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
590 uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
591
592 UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
593
594 *dst = NULL;
595 return hdr;
596}
597
598static int
599uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
600{
601 struct usb_composite_dev *cdev = c->cdev;
602 struct uvc_device *uvc = to_uvc(f);
603 struct usb_string *us;
604 unsigned int max_packet_mult;
605 unsigned int max_packet_size;
606 struct usb_ep *ep;
607 struct f_uvc_opts *opts;
608 int ret = -EINVAL;
609
610 INFO(cdev, "uvc_function_bind\n");
611
612 opts = fi_to_f_uvc_opts(f->fi);
613
614
615 opts->streaming_interval = clamp(opts->streaming_interval, 1U, 16U);
616 opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, 1U, 3072U);
617 opts->streaming_maxburst = min(opts->streaming_maxburst, 15U);
618
619
620
621
622
623
624
625 if (opts->streaming_maxpacket <= 1024) {
626 max_packet_mult = 1;
627 max_packet_size = opts->streaming_maxpacket;
628 } else if (opts->streaming_maxpacket <= 2048) {
629 max_packet_mult = 2;
630 max_packet_size = opts->streaming_maxpacket / 2;
631 } else {
632 max_packet_mult = 3;
633 max_packet_size = opts->streaming_maxpacket / 3;
634 }
635
636 uvc_fs_streaming_ep.wMaxPacketSize =
637 cpu_to_le16(min(opts->streaming_maxpacket, 1023U));
638 uvc_fs_streaming_ep.bInterval = opts->streaming_interval;
639
640 uvc_hs_streaming_ep.wMaxPacketSize =
641 cpu_to_le16(max_packet_size | ((max_packet_mult - 1) << 11));
642 uvc_hs_streaming_ep.bInterval = opts->streaming_interval;
643
644 uvc_ss_streaming_ep.wMaxPacketSize = cpu_to_le16(max_packet_size);
645 uvc_ss_streaming_ep.bInterval = opts->streaming_interval;
646 uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
647 uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst;
648 uvc_ss_streaming_comp.wBytesPerInterval =
649 cpu_to_le16(max_packet_size * max_packet_mult *
650 opts->streaming_maxburst);
651
652
653 ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
654 if (!ep) {
655 INFO(cdev, "Unable to allocate control EP\n");
656 goto error;
657 }
658 uvc->control_ep = ep;
659 ep->driver_data = uvc;
660
661 if (gadget_is_superspeed(c->cdev->gadget))
662 ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
663 &uvc_ss_streaming_comp);
664 else if (gadget_is_dualspeed(cdev->gadget))
665 ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
666 else
667 ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
668
669 if (!ep) {
670 INFO(cdev, "Unable to allocate streaming EP\n");
671 goto error;
672 }
673 uvc->video.ep = ep;
674 ep->driver_data = uvc;
675
676 uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
677 uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
678 uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
679
680 us = usb_gstrings_attach(cdev, uvc_function_strings,
681 ARRAY_SIZE(uvc_en_us_strings));
682 if (IS_ERR(us)) {
683 ret = PTR_ERR(us);
684 goto error;
685 }
686 uvc_iad.iFunction = us[UVC_STRING_CONTROL_IDX].id;
687 uvc_control_intf.iInterface = us[UVC_STRING_CONTROL_IDX].id;
688 ret = us[UVC_STRING_STREAMING_IDX].id;
689 uvc_streaming_intf_alt0.iInterface = ret;
690 uvc_streaming_intf_alt1.iInterface = ret;
691
692
693 if ((ret = usb_interface_id(c, f)) < 0)
694 goto error;
695 uvc_iad.bFirstInterface = ret;
696 uvc_control_intf.bInterfaceNumber = ret;
697 uvc->control_intf = ret;
698
699 if ((ret = usb_interface_id(c, f)) < 0)
700 goto error;
701 uvc_streaming_intf_alt0.bInterfaceNumber = ret;
702 uvc_streaming_intf_alt1.bInterfaceNumber = ret;
703 uvc->streaming_intf = ret;
704
705
706 f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
707 if (IS_ERR(f->fs_descriptors)) {
708 ret = PTR_ERR(f->fs_descriptors);
709 f->fs_descriptors = NULL;
710 goto error;
711 }
712 if (gadget_is_dualspeed(cdev->gadget)) {
713 f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
714 if (IS_ERR(f->hs_descriptors)) {
715 ret = PTR_ERR(f->hs_descriptors);
716 f->hs_descriptors = NULL;
717 goto error;
718 }
719 }
720 if (gadget_is_superspeed(c->cdev->gadget)) {
721 f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
722 if (IS_ERR(f->ss_descriptors)) {
723 ret = PTR_ERR(f->ss_descriptors);
724 f->ss_descriptors = NULL;
725 goto error;
726 }
727 }
728
729
730 uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
731 uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
732 if (uvc->control_req == NULL || uvc->control_buf == NULL) {
733 ret = -ENOMEM;
734 goto error;
735 }
736
737 uvc->control_req->buf = uvc->control_buf;
738 uvc->control_req->complete = uvc_function_ep0_complete;
739 uvc->control_req->context = uvc;
740
741
742
743
744 if ((ret = usb_function_deactivate(f)) < 0)
745 goto error;
746
747 if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
748 printk(KERN_INFO "v4l2_device_register failed\n");
749 goto error;
750 }
751
752
753 ret = uvcg_video_init(&uvc->video);
754 if (ret < 0)
755 goto error;
756
757
758 ret = uvc_register_video(uvc);
759 if (ret < 0) {
760 printk(KERN_INFO "Unable to register video device\n");
761 goto error;
762 }
763
764 return 0;
765
766error:
767 v4l2_device_unregister(&uvc->v4l2_dev);
768 if (uvc->vdev)
769 video_device_release(uvc->vdev);
770
771 if (uvc->control_ep)
772 uvc->control_ep->driver_data = NULL;
773 if (uvc->video.ep)
774 uvc->video.ep->driver_data = NULL;
775
776 if (uvc->control_req)
777 usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
778 kfree(uvc->control_buf);
779
780 usb_free_all_descriptors(f);
781 return ret;
782}
783
784
785
786
787
788static void uvc_free_inst(struct usb_function_instance *f)
789{
790 struct f_uvc_opts *opts = fi_to_f_uvc_opts(f);
791
792 mutex_destroy(&opts->lock);
793 kfree(opts);
794}
795
796static struct usb_function_instance *uvc_alloc_inst(void)
797{
798 struct f_uvc_opts *opts;
799 struct uvc_camera_terminal_descriptor *cd;
800 struct uvc_processing_unit_descriptor *pd;
801 struct uvc_output_terminal_descriptor *od;
802 struct uvc_color_matching_descriptor *md;
803 struct uvc_descriptor_header **ctl_cls;
804
805 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
806 if (!opts)
807 return ERR_PTR(-ENOMEM);
808 opts->func_inst.free_func_inst = uvc_free_inst;
809 mutex_init(&opts->lock);
810
811 cd = &opts->uvc_camera_terminal;
812 cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3);
813 cd->bDescriptorType = USB_DT_CS_INTERFACE;
814 cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL;
815 cd->bTerminalID = 1;
816 cd->wTerminalType = cpu_to_le16(0x0201);
817 cd->bAssocTerminal = 0;
818 cd->iTerminal = 0;
819 cd->wObjectiveFocalLengthMin = cpu_to_le16(0);
820 cd->wObjectiveFocalLengthMax = cpu_to_le16(0);
821 cd->wOcularFocalLength = cpu_to_le16(0);
822 cd->bControlSize = 3;
823 cd->bmControls[0] = 2;
824 cd->bmControls[1] = 0;
825 cd->bmControls[2] = 0;
826
827 pd = &opts->uvc_processing;
828 pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2);
829 pd->bDescriptorType = USB_DT_CS_INTERFACE;
830 pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT;
831 pd->bUnitID = 2;
832 pd->bSourceID = 1;
833 pd->wMaxMultiplier = cpu_to_le16(16*1024);
834 pd->bControlSize = 2;
835 pd->bmControls[0] = 1;
836 pd->bmControls[1] = 0;
837 pd->iProcessing = 0;
838
839 od = &opts->uvc_output_terminal;
840 od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE;
841 od->bDescriptorType = USB_DT_CS_INTERFACE;
842 od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL;
843 od->bTerminalID = 3;
844 od->wTerminalType = cpu_to_le16(0x0101);
845 od->bAssocTerminal = 0;
846 od->bSourceID = 2;
847 od->iTerminal = 0;
848
849 md = &opts->uvc_color_matching;
850 md->bLength = UVC_DT_COLOR_MATCHING_SIZE;
851 md->bDescriptorType = USB_DT_CS_INTERFACE;
852 md->bDescriptorSubType = UVC_VS_COLORFORMAT;
853 md->bColorPrimaries = 1;
854 md->bTransferCharacteristics = 1;
855 md->bMatrixCoefficients = 4;
856
857
858 ctl_cls = opts->uvc_fs_control_cls;
859 ctl_cls[0] = NULL;
860 ctl_cls[1] = (struct uvc_descriptor_header *)cd;
861 ctl_cls[2] = (struct uvc_descriptor_header *)pd;
862 ctl_cls[3] = (struct uvc_descriptor_header *)od;
863 ctl_cls[4] = NULL;
864 opts->fs_control =
865 (const struct uvc_descriptor_header * const *)ctl_cls;
866
867
868 ctl_cls = opts->uvc_ss_control_cls;
869 ctl_cls[0] = NULL;
870 ctl_cls[1] = (struct uvc_descriptor_header *)cd;
871 ctl_cls[2] = (struct uvc_descriptor_header *)pd;
872 ctl_cls[3] = (struct uvc_descriptor_header *)od;
873 ctl_cls[4] = NULL;
874 opts->ss_control =
875 (const struct uvc_descriptor_header * const *)ctl_cls;
876
877 opts->streaming_interval = 1;
878 opts->streaming_maxpacket = 1024;
879
880 uvcg_attach_configfs(opts);
881 return &opts->func_inst;
882}
883
884static void uvc_free(struct usb_function *f)
885{
886 struct uvc_device *uvc = to_uvc(f);
887 struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts,
888 func_inst);
889 --opts->refcnt;
890 kfree(uvc);
891}
892
893static void uvc_unbind(struct usb_configuration *c, struct usb_function *f)
894{
895 struct usb_composite_dev *cdev = c->cdev;
896 struct uvc_device *uvc = to_uvc(f);
897
898 INFO(cdev, "%s\n", __func__);
899
900 video_unregister_device(uvc->vdev);
901 v4l2_device_unregister(&uvc->v4l2_dev);
902 uvc->control_ep->driver_data = NULL;
903 uvc->video.ep->driver_data = NULL;
904
905 usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
906 kfree(uvc->control_buf);
907
908 usb_free_all_descriptors(f);
909}
910
911static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
912{
913 struct uvc_device *uvc;
914 struct f_uvc_opts *opts;
915 struct uvc_descriptor_header **strm_cls;
916
917 uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
918 if (uvc == NULL)
919 return ERR_PTR(-ENOMEM);
920
921 uvc->state = UVC_STATE_DISCONNECTED;
922 opts = fi_to_f_uvc_opts(fi);
923
924 mutex_lock(&opts->lock);
925 if (opts->uvc_fs_streaming_cls) {
926 strm_cls = opts->uvc_fs_streaming_cls;
927 opts->fs_streaming =
928 (const struct uvc_descriptor_header * const *)strm_cls;
929 }
930 if (opts->uvc_hs_streaming_cls) {
931 strm_cls = opts->uvc_hs_streaming_cls;
932 opts->hs_streaming =
933 (const struct uvc_descriptor_header * const *)strm_cls;
934 }
935 if (opts->uvc_ss_streaming_cls) {
936 strm_cls = opts->uvc_ss_streaming_cls;
937 opts->ss_streaming =
938 (const struct uvc_descriptor_header * const *)strm_cls;
939 }
940
941 uvc->desc.fs_control = opts->fs_control;
942 uvc->desc.ss_control = opts->ss_control;
943 uvc->desc.fs_streaming = opts->fs_streaming;
944 uvc->desc.hs_streaming = opts->hs_streaming;
945 uvc->desc.ss_streaming = opts->ss_streaming;
946 ++opts->refcnt;
947 mutex_unlock(&opts->lock);
948
949
950 uvc->func.name = "uvc";
951 uvc->func.bind = uvc_function_bind;
952 uvc->func.unbind = uvc_unbind;
953 uvc->func.get_alt = uvc_function_get_alt;
954 uvc->func.set_alt = uvc_function_set_alt;
955 uvc->func.disable = uvc_function_disable;
956 uvc->func.setup = uvc_function_setup;
957 uvc->func.free_func = uvc_free;
958
959 return &uvc->func;
960}
961
962DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc);
963MODULE_LICENSE("GPL");
964MODULE_AUTHOR("Laurent Pinchart");
965
