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9#include <linux/device.h>
10#include <linux/errno.h>
11#include <linux/fs.h>
12#include <linux/kernel.h>
13#include <linux/list.h>
14#include <linux/module.h>
15#include <linux/mutex.h>
16#include <linux/string.h>
17#include <linux/usb/ch9.h>
18#include <linux/usb/gadget.h>
19#include <linux/usb/g_uvc.h>
20#include <linux/usb/video.h>
21#include <linux/vmalloc.h>
22#include <linux/wait.h>
23
24#include <media/v4l2-dev.h>
25#include <media/v4l2-event.h>
26
27#include "uvc.h"
28#include "uvc_configfs.h"
29#include "uvc_v4l2.h"
30#include "uvc_video.h"
31
32unsigned int uvc_gadget_trace_param;
33module_param_named(trace, uvc_gadget_trace_param, uint, 0644);
34MODULE_PARM_DESC(trace, "Trace level bitmask");
35
36
37
38
39
40
41
42#define UVC_STRING_CONTROL_IDX 0
43#define UVC_STRING_STREAMING_IDX 1
44
45static struct usb_string uvc_en_us_strings[] = {
46
47 [UVC_STRING_STREAMING_IDX].s = "Video Streaming",
48 { }
49};
50
51static struct usb_gadget_strings uvc_stringtab = {
52 .language = 0x0409,
53 .strings = uvc_en_us_strings,
54};
55
56static struct usb_gadget_strings *uvc_function_strings[] = {
57 &uvc_stringtab,
58 NULL,
59};
60
61#define UVC_INTF_VIDEO_CONTROL 0
62#define UVC_INTF_VIDEO_STREAMING 1
63
64#define UVC_STATUS_MAX_PACKET_SIZE 16
65
66static struct usb_interface_assoc_descriptor uvc_iad = {
67 .bLength = sizeof(uvc_iad),
68 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
69 .bFirstInterface = 0,
70 .bInterfaceCount = 2,
71 .bFunctionClass = USB_CLASS_VIDEO,
72 .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION,
73 .bFunctionProtocol = 0x00,
74 .iFunction = 0,
75};
76
77static struct usb_interface_descriptor uvc_control_intf = {
78 .bLength = USB_DT_INTERFACE_SIZE,
79 .bDescriptorType = USB_DT_INTERFACE,
80 .bInterfaceNumber = UVC_INTF_VIDEO_CONTROL,
81 .bAlternateSetting = 0,
82 .bNumEndpoints = 1,
83 .bInterfaceClass = USB_CLASS_VIDEO,
84 .bInterfaceSubClass = UVC_SC_VIDEOCONTROL,
85 .bInterfaceProtocol = 0x00,
86 .iInterface = 0,
87};
88
89static struct usb_endpoint_descriptor uvc_control_ep = {
90 .bLength = USB_DT_ENDPOINT_SIZE,
91 .bDescriptorType = USB_DT_ENDPOINT,
92 .bEndpointAddress = USB_DIR_IN,
93 .bmAttributes = USB_ENDPOINT_XFER_INT,
94 .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
95 .bInterval = 8,
96};
97
98static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = {
99 .bLength = sizeof(uvc_ss_control_comp),
100 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
101
102 .bMaxBurst = 0,
103 .bmAttributes = 0,
104 .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
105};
106
107static struct uvc_control_endpoint_descriptor uvc_control_cs_ep = {
108 .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
109 .bDescriptorType = USB_DT_CS_ENDPOINT,
110 .bDescriptorSubType = UVC_EP_INTERRUPT,
111 .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
112};
113
114static struct usb_interface_descriptor uvc_streaming_intf_alt0 = {
115 .bLength = USB_DT_INTERFACE_SIZE,
116 .bDescriptorType = USB_DT_INTERFACE,
117 .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
118 .bAlternateSetting = 0,
119 .bNumEndpoints = 0,
120 .bInterfaceClass = USB_CLASS_VIDEO,
121 .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
122 .bInterfaceProtocol = 0x00,
123 .iInterface = 0,
124};
125
126static struct usb_interface_descriptor uvc_streaming_intf_alt1 = {
127 .bLength = USB_DT_INTERFACE_SIZE,
128 .bDescriptorType = USB_DT_INTERFACE,
129 .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
130 .bAlternateSetting = 1,
131 .bNumEndpoints = 1,
132 .bInterfaceClass = USB_CLASS_VIDEO,
133 .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
134 .bInterfaceProtocol = 0x00,
135 .iInterface = 0,
136};
137
138static struct usb_endpoint_descriptor uvc_fs_streaming_ep = {
139 .bLength = USB_DT_ENDPOINT_SIZE,
140 .bDescriptorType = USB_DT_ENDPOINT,
141 .bEndpointAddress = USB_DIR_IN,
142 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
143 | USB_ENDPOINT_XFER_ISOC,
144
145
146
147};
148
149static struct usb_endpoint_descriptor uvc_hs_streaming_ep = {
150 .bLength = USB_DT_ENDPOINT_SIZE,
151 .bDescriptorType = USB_DT_ENDPOINT,
152 .bEndpointAddress = USB_DIR_IN,
153 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
154 | USB_ENDPOINT_XFER_ISOC,
155
156
157
158};
159
160static struct usb_endpoint_descriptor uvc_ss_streaming_ep = {
161 .bLength = USB_DT_ENDPOINT_SIZE,
162 .bDescriptorType = USB_DT_ENDPOINT,
163
164 .bEndpointAddress = USB_DIR_IN,
165 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
166 | USB_ENDPOINT_XFER_ISOC,
167
168
169
170};
171
172static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = {
173 .bLength = sizeof(uvc_ss_streaming_comp),
174 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
175
176
177
178};
179
180static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
181 (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
182 (struct usb_descriptor_header *) &uvc_fs_streaming_ep,
183 NULL,
184};
185
186static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
187 (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
188 (struct usb_descriptor_header *) &uvc_hs_streaming_ep,
189 NULL,
190};
191
192static const struct usb_descriptor_header * const uvc_ss_streaming[] = {
193 (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
194 (struct usb_descriptor_header *) &uvc_ss_streaming_ep,
195 (struct usb_descriptor_header *) &uvc_ss_streaming_comp,
196 NULL,
197};
198
199
200
201
202
203static void
204uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req)
205{
206 struct uvc_device *uvc = req->context;
207 struct v4l2_event v4l2_event;
208 struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
209
210 if (uvc->event_setup_out) {
211 uvc->event_setup_out = 0;
212
213 memset(&v4l2_event, 0, sizeof(v4l2_event));
214 v4l2_event.type = UVC_EVENT_DATA;
215 uvc_event->data.length = req->actual;
216 memcpy(&uvc_event->data.data, req->buf, req->actual);
217 v4l2_event_queue(&uvc->vdev, &v4l2_event);
218 }
219}
220
221static int
222uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
223{
224 struct uvc_device *uvc = to_uvc(f);
225 struct v4l2_event v4l2_event;
226 struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
227
228 if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
229 uvcg_info(f, "invalid request type\n");
230 return -EINVAL;
231 }
232
233
234 if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
235 return -EINVAL;
236
237
238
239
240 uvc->event_setup_out = !(ctrl->bRequestType & USB_DIR_IN);
241 uvc->event_length = le16_to_cpu(ctrl->wLength);
242
243 memset(&v4l2_event, 0, sizeof(v4l2_event));
244 v4l2_event.type = UVC_EVENT_SETUP;
245 memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
246 v4l2_event_queue(&uvc->vdev, &v4l2_event);
247
248 return 0;
249}
250
251void uvc_function_setup_continue(struct uvc_device *uvc)
252{
253 struct usb_composite_dev *cdev = uvc->func.config->cdev;
254
255 usb_composite_setup_continue(cdev);
256}
257
258static int
259uvc_function_get_alt(struct usb_function *f, unsigned interface)
260{
261 struct uvc_device *uvc = to_uvc(f);
262
263 uvcg_info(f, "%s(%u)\n", __func__, interface);
264
265 if (interface == uvc->control_intf)
266 return 0;
267 else if (interface != uvc->streaming_intf)
268 return -EINVAL;
269 else
270 return uvc->video.ep->enabled ? 1 : 0;
271}
272
273static int
274uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
275{
276 struct uvc_device *uvc = to_uvc(f);
277 struct usb_composite_dev *cdev = f->config->cdev;
278 struct v4l2_event v4l2_event;
279 struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
280 int ret;
281
282 uvcg_info(f, "%s(%u, %u)\n", __func__, interface, alt);
283
284 if (interface == uvc->control_intf) {
285 if (alt)
286 return -EINVAL;
287
288 uvcg_info(f, "reset UVC Control\n");
289 usb_ep_disable(uvc->control_ep);
290
291 if (!uvc->control_ep->desc)
292 if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep))
293 return -EINVAL;
294
295 usb_ep_enable(uvc->control_ep);
296
297 if (uvc->state == UVC_STATE_DISCONNECTED) {
298 memset(&v4l2_event, 0, sizeof(v4l2_event));
299 v4l2_event.type = UVC_EVENT_CONNECT;
300 uvc_event->speed = cdev->gadget->speed;
301 v4l2_event_queue(&uvc->vdev, &v4l2_event);
302
303 uvc->state = UVC_STATE_CONNECTED;
304 }
305
306 return 0;
307 }
308
309 if (interface != uvc->streaming_intf)
310 return -EINVAL;
311
312
313
314
315
316
317 switch (alt) {
318 case 0:
319 if (uvc->state != UVC_STATE_STREAMING)
320 return 0;
321
322 if (uvc->video.ep)
323 usb_ep_disable(uvc->video.ep);
324
325 memset(&v4l2_event, 0, sizeof(v4l2_event));
326 v4l2_event.type = UVC_EVENT_STREAMOFF;
327 v4l2_event_queue(&uvc->vdev, &v4l2_event);
328
329 uvc->state = UVC_STATE_CONNECTED;
330 return 0;
331
332 case 1:
333 if (uvc->state != UVC_STATE_CONNECTED)
334 return 0;
335
336 if (!uvc->video.ep)
337 return -EINVAL;
338
339 uvcg_info(f, "reset UVC\n");
340 usb_ep_disable(uvc->video.ep);
341
342 ret = config_ep_by_speed(f->config->cdev->gadget,
343 &(uvc->func), uvc->video.ep);
344 if (ret)
345 return ret;
346 usb_ep_enable(uvc->video.ep);
347
348 memset(&v4l2_event, 0, sizeof(v4l2_event));
349 v4l2_event.type = UVC_EVENT_STREAMON;
350 v4l2_event_queue(&uvc->vdev, &v4l2_event);
351 return USB_GADGET_DELAYED_STATUS;
352
353 default:
354 return -EINVAL;
355 }
356}
357
358static void
359uvc_function_disable(struct usb_function *f)
360{
361 struct uvc_device *uvc = to_uvc(f);
362 struct v4l2_event v4l2_event;
363
364 uvcg_info(f, "%s()\n", __func__);
365
366 memset(&v4l2_event, 0, sizeof(v4l2_event));
367 v4l2_event.type = UVC_EVENT_DISCONNECT;
368 v4l2_event_queue(&uvc->vdev, &v4l2_event);
369
370 uvc->state = UVC_STATE_DISCONNECTED;
371
372 usb_ep_disable(uvc->video.ep);
373 usb_ep_disable(uvc->control_ep);
374}
375
376
377
378
379
380void
381uvc_function_connect(struct uvc_device *uvc)
382{
383 int ret;
384
385 if ((ret = usb_function_activate(&uvc->func)) < 0)
386 uvcg_info(&uvc->func, "UVC connect failed with %d\n", ret);
387}
388
389void
390uvc_function_disconnect(struct uvc_device *uvc)
391{
392 int ret;
393
394 if ((ret = usb_function_deactivate(&uvc->func)) < 0)
395 uvcg_info(&uvc->func, "UVC disconnect failed with %d\n", ret);
396}
397
398
399
400
401
402static ssize_t function_name_show(struct device *dev,
403 struct device_attribute *attr, char *buf)
404{
405 struct uvc_device *uvc = dev_get_drvdata(dev);
406
407 return sprintf(buf, "%s\n", uvc->func.fi->group.cg_item.ci_name);
408}
409
410static DEVICE_ATTR_RO(function_name);
411
412static int
413uvc_register_video(struct uvc_device *uvc)
414{
415 struct usb_composite_dev *cdev = uvc->func.config->cdev;
416 int ret;
417
418
419 memset(&uvc->vdev, 0, sizeof(uvc->video));
420 uvc->vdev.v4l2_dev = &uvc->v4l2_dev;
421 uvc->vdev.v4l2_dev->dev = &cdev->gadget->dev;
422 uvc->vdev.fops = &uvc_v4l2_fops;
423 uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops;
424 uvc->vdev.release = video_device_release_empty;
425 uvc->vdev.vfl_dir = VFL_DIR_TX;
426 uvc->vdev.lock = &uvc->video.mutex;
427 uvc->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
428 strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name));
429
430 video_set_drvdata(&uvc->vdev, uvc);
431
432 ret = video_register_device(&uvc->vdev, VFL_TYPE_VIDEO, -1);
433 if (ret < 0)
434 return ret;
435
436 ret = device_create_file(&uvc->vdev.dev, &dev_attr_function_name);
437 if (ret < 0) {
438 video_unregister_device(&uvc->vdev);
439 return ret;
440 }
441
442 return 0;
443}
444
445#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
446 do { \
447 memcpy(mem, desc, (desc)->bLength); \
448 *(dst)++ = mem; \
449 mem += (desc)->bLength; \
450 } while (0);
451
452#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
453 do { \
454 const struct usb_descriptor_header * const *__src; \
455 for (__src = src; *__src; ++__src) { \
456 memcpy(mem, *__src, (*__src)->bLength); \
457 *dst++ = mem; \
458 mem += (*__src)->bLength; \
459 } \
460 } while (0)
461
462static struct usb_descriptor_header **
463uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
464{
465 struct uvc_input_header_descriptor *uvc_streaming_header;
466 struct uvc_header_descriptor *uvc_control_header;
467 const struct uvc_descriptor_header * const *uvc_control_desc;
468 const struct uvc_descriptor_header * const *uvc_streaming_cls;
469 const struct usb_descriptor_header * const *uvc_streaming_std;
470 const struct usb_descriptor_header * const *src;
471 struct usb_descriptor_header **dst;
472 struct usb_descriptor_header **hdr;
473 unsigned int control_size;
474 unsigned int streaming_size;
475 unsigned int n_desc;
476 unsigned int bytes;
477 void *mem;
478
479 switch (speed) {
480 case USB_SPEED_SUPER:
481 uvc_control_desc = uvc->desc.ss_control;
482 uvc_streaming_cls = uvc->desc.ss_streaming;
483 uvc_streaming_std = uvc_ss_streaming;
484 break;
485
486 case USB_SPEED_HIGH:
487 uvc_control_desc = uvc->desc.fs_control;
488 uvc_streaming_cls = uvc->desc.hs_streaming;
489 uvc_streaming_std = uvc_hs_streaming;
490 break;
491
492 case USB_SPEED_FULL:
493 default:
494 uvc_control_desc = uvc->desc.fs_control;
495 uvc_streaming_cls = uvc->desc.fs_streaming;
496 uvc_streaming_std = uvc_fs_streaming;
497 break;
498 }
499
500 if (!uvc_control_desc || !uvc_streaming_cls)
501 return ERR_PTR(-ENODEV);
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517 control_size = 0;
518 streaming_size = 0;
519 bytes = uvc_iad.bLength + uvc_control_intf.bLength
520 + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
521 + uvc_streaming_intf_alt0.bLength;
522
523 if (speed == USB_SPEED_SUPER) {
524 bytes += uvc_ss_control_comp.bLength;
525 n_desc = 6;
526 } else {
527 n_desc = 5;
528 }
529
530 for (src = (const struct usb_descriptor_header **)uvc_control_desc;
531 *src; ++src) {
532 control_size += (*src)->bLength;
533 bytes += (*src)->bLength;
534 n_desc++;
535 }
536 for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
537 *src; ++src) {
538 streaming_size += (*src)->bLength;
539 bytes += (*src)->bLength;
540 n_desc++;
541 }
542 for (src = uvc_streaming_std; *src; ++src) {
543 bytes += (*src)->bLength;
544 n_desc++;
545 }
546
547 mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
548 if (mem == NULL)
549 return NULL;
550
551 hdr = mem;
552 dst = mem;
553 mem += (n_desc + 1) * sizeof(*src);
554
555
556 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
557 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
558
559 uvc_control_header = mem;
560 UVC_COPY_DESCRIPTORS(mem, dst,
561 (const struct usb_descriptor_header **)uvc_control_desc);
562 uvc_control_header->wTotalLength = cpu_to_le16(control_size);
563 uvc_control_header->bInCollection = 1;
564 uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
565
566 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
567 if (speed == USB_SPEED_SUPER)
568 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
569
570 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
571 UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
572
573 uvc_streaming_header = mem;
574 UVC_COPY_DESCRIPTORS(mem, dst,
575 (const struct usb_descriptor_header**)uvc_streaming_cls);
576 uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
577 uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
578
579 UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
580
581 *dst = NULL;
582 return hdr;
583}
584
585static int
586uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
587{
588 struct usb_composite_dev *cdev = c->cdev;
589 struct uvc_device *uvc = to_uvc(f);
590 struct usb_string *us;
591 unsigned int max_packet_mult;
592 unsigned int max_packet_size;
593 struct usb_ep *ep;
594 struct f_uvc_opts *opts;
595 int ret = -EINVAL;
596
597 uvcg_info(f, "%s()\n", __func__);
598
599 opts = fi_to_f_uvc_opts(f->fi);
600
601
602 opts->streaming_interval = clamp(opts->streaming_interval, 1U, 16U);
603 opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, 1U, 3072U);
604 opts->streaming_maxburst = min(opts->streaming_maxburst, 15U);
605
606
607 if (opts->streaming_maxburst &&
608 (opts->streaming_maxpacket % 1024) != 0) {
609 opts->streaming_maxpacket = roundup(opts->streaming_maxpacket, 1024);
610 uvcg_info(f, "overriding streaming_maxpacket to %d\n",
611 opts->streaming_maxpacket);
612 }
613
614
615
616
617
618
619
620 if (opts->streaming_maxpacket <= 1024) {
621 max_packet_mult = 1;
622 max_packet_size = opts->streaming_maxpacket;
623 } else if (opts->streaming_maxpacket <= 2048) {
624 max_packet_mult = 2;
625 max_packet_size = opts->streaming_maxpacket / 2;
626 } else {
627 max_packet_mult = 3;
628 max_packet_size = opts->streaming_maxpacket / 3;
629 }
630
631 uvc_fs_streaming_ep.wMaxPacketSize =
632 cpu_to_le16(min(opts->streaming_maxpacket, 1023U));
633 uvc_fs_streaming_ep.bInterval = opts->streaming_interval;
634
635 uvc_hs_streaming_ep.wMaxPacketSize =
636 cpu_to_le16(max_packet_size | ((max_packet_mult - 1) << 11));
637
638
639 if (max_packet_mult > 1)
640 uvc_hs_streaming_ep.bInterval = 1;
641 else
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 + 1));
651
652
653 ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
654 if (!ep) {
655 uvcg_info(f, "Unable to allocate control EP\n");
656 goto error;
657 }
658 uvc->control_ep = ep;
659
660 if (gadget_is_superspeed(c->cdev->gadget))
661 ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
662 &uvc_ss_streaming_comp);
663 else if (gadget_is_dualspeed(cdev->gadget))
664 ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
665 else
666 ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
667
668 if (!ep) {
669 uvcg_info(f, "Unable to allocate streaming EP\n");
670 goto error;
671 }
672 uvc->video.ep = ep;
673
674 uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
675 uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
676 uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
677
678 uvc_en_us_strings[UVC_STRING_CONTROL_IDX].s = opts->function_name;
679 us = usb_gstrings_attach(cdev, uvc_function_strings,
680 ARRAY_SIZE(uvc_en_us_strings));
681 if (IS_ERR(us)) {
682 ret = PTR_ERR(us);
683 goto error;
684 }
685 uvc_iad.iFunction = us[UVC_STRING_CONTROL_IDX].id;
686 uvc_control_intf.iInterface = us[UVC_STRING_CONTROL_IDX].id;
687 ret = us[UVC_STRING_STREAMING_IDX].id;
688 uvc_streaming_intf_alt0.iInterface = ret;
689 uvc_streaming_intf_alt1.iInterface = ret;
690
691
692 if ((ret = usb_interface_id(c, f)) < 0)
693 goto error;
694 uvc_iad.bFirstInterface = ret;
695 uvc_control_intf.bInterfaceNumber = ret;
696 uvc->control_intf = ret;
697 opts->control_interface = 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 opts->streaming_interface = ret;
705
706
707 f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
708 if (IS_ERR(f->fs_descriptors)) {
709 ret = PTR_ERR(f->fs_descriptors);
710 f->fs_descriptors = NULL;
711 goto error;
712 }
713 if (gadget_is_dualspeed(cdev->gadget)) {
714 f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
715 if (IS_ERR(f->hs_descriptors)) {
716 ret = PTR_ERR(f->hs_descriptors);
717 f->hs_descriptors = NULL;
718 goto error;
719 }
720 }
721 if (gadget_is_superspeed(c->cdev->gadget)) {
722 f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
723 if (IS_ERR(f->ss_descriptors)) {
724 ret = PTR_ERR(f->ss_descriptors);
725 f->ss_descriptors = NULL;
726 goto error;
727 }
728 }
729
730
731 uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
732 uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
733 if (uvc->control_req == NULL || uvc->control_buf == NULL) {
734 ret = -ENOMEM;
735 goto error;
736 }
737
738 uvc->control_req->buf = uvc->control_buf;
739 uvc->control_req->complete = uvc_function_ep0_complete;
740 uvc->control_req->context = uvc;
741
742 if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
743 uvcg_err(f, "failed to register V4L2 device\n");
744 goto error;
745 }
746
747
748 ret = uvcg_video_init(&uvc->video, uvc);
749 if (ret < 0)
750 goto v4l2_error;
751
752
753 ret = uvc_register_video(uvc);
754 if (ret < 0) {
755 uvcg_err(f, "failed to register video device\n");
756 goto v4l2_error;
757 }
758
759 return 0;
760
761v4l2_error:
762 v4l2_device_unregister(&uvc->v4l2_dev);
763error:
764 if (uvc->control_req)
765 usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
766 kfree(uvc->control_buf);
767
768 usb_free_all_descriptors(f);
769 return ret;
770}
771
772
773
774
775
776static void uvc_free_inst(struct usb_function_instance *f)
777{
778 struct f_uvc_opts *opts = fi_to_f_uvc_opts(f);
779
780 mutex_destroy(&opts->lock);
781 kfree(opts);
782}
783
784static struct usb_function_instance *uvc_alloc_inst(void)
785{
786 struct f_uvc_opts *opts;
787 struct uvc_camera_terminal_descriptor *cd;
788 struct uvc_processing_unit_descriptor *pd;
789 struct uvc_output_terminal_descriptor *od;
790 struct uvc_color_matching_descriptor *md;
791 struct uvc_descriptor_header **ctl_cls;
792 int ret;
793
794 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
795 if (!opts)
796 return ERR_PTR(-ENOMEM);
797 opts->func_inst.free_func_inst = uvc_free_inst;
798 mutex_init(&opts->lock);
799
800 cd = &opts->uvc_camera_terminal;
801 cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3);
802 cd->bDescriptorType = USB_DT_CS_INTERFACE;
803 cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL;
804 cd->bTerminalID = 1;
805 cd->wTerminalType = cpu_to_le16(0x0201);
806 cd->bAssocTerminal = 0;
807 cd->iTerminal = 0;
808 cd->wObjectiveFocalLengthMin = cpu_to_le16(0);
809 cd->wObjectiveFocalLengthMax = cpu_to_le16(0);
810 cd->wOcularFocalLength = cpu_to_le16(0);
811 cd->bControlSize = 3;
812 cd->bmControls[0] = 2;
813 cd->bmControls[1] = 0;
814 cd->bmControls[2] = 0;
815
816 pd = &opts->uvc_processing;
817 pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2);
818 pd->bDescriptorType = USB_DT_CS_INTERFACE;
819 pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT;
820 pd->bUnitID = 2;
821 pd->bSourceID = 1;
822 pd->wMaxMultiplier = cpu_to_le16(16*1024);
823 pd->bControlSize = 2;
824 pd->bmControls[0] = 1;
825 pd->bmControls[1] = 0;
826 pd->iProcessing = 0;
827 pd->bmVideoStandards = 0;
828
829 od = &opts->uvc_output_terminal;
830 od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE;
831 od->bDescriptorType = USB_DT_CS_INTERFACE;
832 od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL;
833 od->bTerminalID = 3;
834 od->wTerminalType = cpu_to_le16(0x0101);
835 od->bAssocTerminal = 0;
836 od->bSourceID = 2;
837 od->iTerminal = 0;
838
839 md = &opts->uvc_color_matching;
840 md->bLength = UVC_DT_COLOR_MATCHING_SIZE;
841 md->bDescriptorType = USB_DT_CS_INTERFACE;
842 md->bDescriptorSubType = UVC_VS_COLORFORMAT;
843 md->bColorPrimaries = 1;
844 md->bTransferCharacteristics = 1;
845 md->bMatrixCoefficients = 4;
846
847
848 ctl_cls = opts->uvc_fs_control_cls;
849 ctl_cls[0] = NULL;
850 ctl_cls[1] = (struct uvc_descriptor_header *)cd;
851 ctl_cls[2] = (struct uvc_descriptor_header *)pd;
852 ctl_cls[3] = (struct uvc_descriptor_header *)od;
853 ctl_cls[4] = NULL;
854 opts->fs_control =
855 (const struct uvc_descriptor_header * const *)ctl_cls;
856
857
858 ctl_cls = opts->uvc_ss_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->ss_control =
865 (const struct uvc_descriptor_header * const *)ctl_cls;
866
867 opts->streaming_interval = 1;
868 opts->streaming_maxpacket = 1024;
869 snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera");
870
871 ret = uvcg_attach_configfs(opts);
872 if (ret < 0) {
873 kfree(opts);
874 return ERR_PTR(ret);
875 }
876
877 return &opts->func_inst;
878}
879
880static void uvc_free(struct usb_function *f)
881{
882 struct uvc_device *uvc = to_uvc(f);
883 struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts,
884 func_inst);
885 --opts->refcnt;
886 kfree(uvc);
887}
888
889static void uvc_function_unbind(struct usb_configuration *c,
890 struct usb_function *f)
891{
892 struct usb_composite_dev *cdev = c->cdev;
893 struct uvc_device *uvc = to_uvc(f);
894 long wait_ret = 1;
895
896 uvcg_info(f, "%s()\n", __func__);
897
898
899
900
901
902
903 if (uvc->func_connected) {
904 uvcg_dbg(f, "waiting for clean disconnect\n");
905 wait_ret = wait_event_interruptible_timeout(uvc->func_connected_queue,
906 uvc->func_connected == false, msecs_to_jiffies(500));
907 uvcg_dbg(f, "done waiting with ret: %ld\n", wait_ret);
908 }
909
910 device_remove_file(&uvc->vdev.dev, &dev_attr_function_name);
911 video_unregister_device(&uvc->vdev);
912 v4l2_device_unregister(&uvc->v4l2_dev);
913
914 if (uvc->func_connected) {
915
916
917
918
919 uvcg_warn(f, "%s no clean disconnect, wait for release\n", __func__);
920 wait_ret = wait_event_interruptible_timeout(uvc->func_connected_queue,
921 uvc->func_connected == false, msecs_to_jiffies(1000));
922 uvcg_dbg(f, "done waiting for release with ret: %ld\n", wait_ret);
923 }
924
925 usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
926 kfree(uvc->control_buf);
927
928 usb_free_all_descriptors(f);
929}
930
931static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
932{
933 struct uvc_device *uvc;
934 struct f_uvc_opts *opts;
935 struct uvc_descriptor_header **strm_cls;
936
937 uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
938 if (uvc == NULL)
939 return ERR_PTR(-ENOMEM);
940
941 mutex_init(&uvc->video.mutex);
942 uvc->state = UVC_STATE_DISCONNECTED;
943 init_waitqueue_head(&uvc->func_connected_queue);
944 opts = fi_to_f_uvc_opts(fi);
945
946 mutex_lock(&opts->lock);
947 if (opts->uvc_fs_streaming_cls) {
948 strm_cls = opts->uvc_fs_streaming_cls;
949 opts->fs_streaming =
950 (const struct uvc_descriptor_header * const *)strm_cls;
951 }
952 if (opts->uvc_hs_streaming_cls) {
953 strm_cls = opts->uvc_hs_streaming_cls;
954 opts->hs_streaming =
955 (const struct uvc_descriptor_header * const *)strm_cls;
956 }
957 if (opts->uvc_ss_streaming_cls) {
958 strm_cls = opts->uvc_ss_streaming_cls;
959 opts->ss_streaming =
960 (const struct uvc_descriptor_header * const *)strm_cls;
961 }
962
963 uvc->desc.fs_control = opts->fs_control;
964 uvc->desc.ss_control = opts->ss_control;
965 uvc->desc.fs_streaming = opts->fs_streaming;
966 uvc->desc.hs_streaming = opts->hs_streaming;
967 uvc->desc.ss_streaming = opts->ss_streaming;
968 ++opts->refcnt;
969 mutex_unlock(&opts->lock);
970
971
972 uvc->func.name = "uvc";
973 uvc->func.bind = uvc_function_bind;
974 uvc->func.unbind = uvc_function_unbind;
975 uvc->func.get_alt = uvc_function_get_alt;
976 uvc->func.set_alt = uvc_function_set_alt;
977 uvc->func.disable = uvc_function_disable;
978 uvc->func.setup = uvc_function_setup;
979 uvc->func.free_func = uvc_free;
980 uvc->func.bind_deactivated = true;
981
982 return &uvc->func;
983}
984
985DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc);
986MODULE_LICENSE("GPL");
987MODULE_AUTHOR("Laurent Pinchart");
988
