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23
24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26#define GSPCA_VERSION "2.14.0"
27
28#include <linux/init.h>
29#include <linux/fs.h>
30#include <linux/vmalloc.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33#include <linux/mm.h>
34#include <linux/string.h>
35#include <linux/pagemap.h>
36#include <linux/io.h>
37#include <asm/page.h>
38#include <linux/uaccess.h>
39#include <linux/ktime.h>
40#include <media/v4l2-ioctl.h>
41#include <media/v4l2-ctrls.h>
42#include <media/v4l2-fh.h>
43#include <media/v4l2-event.h>
44
45#include "gspca.h"
46
47#if IS_ENABLED(CONFIG_INPUT)
48#include <linux/input.h>
49#include <linux/usb/input.h>
50#endif
51
52
53#define DEF_NURBS 3
54#if DEF_NURBS > MAX_NURBS
55#error "DEF_NURBS too big"
56#endif
57
58MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
59MODULE_DESCRIPTION("GSPCA USB Camera Driver");
60MODULE_LICENSE("GPL");
61MODULE_VERSION(GSPCA_VERSION);
62
63int gspca_debug;
64EXPORT_SYMBOL(gspca_debug);
65
66static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
67 __u32 pixfmt, int w, int h)
68{
69 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
70 PDEBUG(debug, "%s %c%c%c%c %dx%d",
71 txt,
72 pixfmt & 0xff,
73 (pixfmt >> 8) & 0xff,
74 (pixfmt >> 16) & 0xff,
75 pixfmt >> 24,
76 w, h);
77 } else {
78 PDEBUG(debug, "%s 0x%08x %dx%d",
79 txt,
80 pixfmt,
81 w, h);
82 }
83}
84
85
86#define GSPCA_MEMORY_NO 0
87#define GSPCA_MEMORY_READ 7
88
89#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
90
91
92
93
94static void gspca_vm_open(struct vm_area_struct *vma)
95{
96 struct gspca_frame *frame = vma->vm_private_data;
97
98 frame->vma_use_count++;
99 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
100}
101
102static void gspca_vm_close(struct vm_area_struct *vma)
103{
104 struct gspca_frame *frame = vma->vm_private_data;
105
106 if (--frame->vma_use_count <= 0)
107 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
108}
109
110static const struct vm_operations_struct gspca_vm_ops = {
111 .open = gspca_vm_open,
112 .close = gspca_vm_close,
113};
114
115
116
117
118#if IS_ENABLED(CONFIG_INPUT)
119static void int_irq(struct urb *urb)
120{
121 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
122 int ret;
123
124 ret = urb->status;
125 switch (ret) {
126 case 0:
127 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
128 urb->transfer_buffer, urb->actual_length) < 0) {
129 PERR("Unknown packet received");
130 }
131 break;
132
133 case -ENOENT:
134 case -ECONNRESET:
135 case -ENODEV:
136 case -ESHUTDOWN:
137
138
139
140 break;
141
142 default:
143 PERR("URB error %i, resubmitting", urb->status);
144 urb->status = 0;
145 ret = 0;
146 }
147
148 if (ret == 0) {
149 ret = usb_submit_urb(urb, GFP_ATOMIC);
150 if (ret < 0)
151 pr_err("Resubmit URB failed with error %i\n", ret);
152 }
153}
154
155static int gspca_input_connect(struct gspca_dev *dev)
156{
157 struct input_dev *input_dev;
158 int err = 0;
159
160 dev->input_dev = NULL;
161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
162 input_dev = input_allocate_device();
163 if (!input_dev)
164 return -ENOMEM;
165
166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
167 strlcat(dev->phys, "/input0", sizeof(dev->phys));
168
169 input_dev->name = dev->sd_desc->name;
170 input_dev->phys = dev->phys;
171
172 usb_to_input_id(dev->dev, &input_dev->id);
173
174 input_dev->evbit[0] = BIT_MASK(EV_KEY);
175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
176 input_dev->dev.parent = &dev->dev->dev;
177
178 err = input_register_device(input_dev);
179 if (err) {
180 pr_err("Input device registration failed with error %i\n",
181 err);
182 input_dev->dev.parent = NULL;
183 input_free_device(input_dev);
184 } else {
185 dev->input_dev = input_dev;
186 }
187 }
188
189 return err;
190}
191
192static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
193 struct usb_endpoint_descriptor *ep)
194{
195 unsigned int buffer_len;
196 int interval;
197 struct urb *urb;
198 struct usb_device *dev;
199 void *buffer = NULL;
200 int ret = -EINVAL;
201
202 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
203 interval = ep->bInterval;
204 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
205 "buffer_len=%u, interval=%u",
206 ep->bEndpointAddress, buffer_len, interval);
207
208 dev = gspca_dev->dev;
209
210 urb = usb_alloc_urb(0, GFP_KERNEL);
211 if (!urb) {
212 ret = -ENOMEM;
213 goto error;
214 }
215
216 buffer = usb_alloc_coherent(dev, buffer_len,
217 GFP_KERNEL, &urb->transfer_dma);
218 if (!buffer) {
219 ret = -ENOMEM;
220 goto error_buffer;
221 }
222 usb_fill_int_urb(urb, dev,
223 usb_rcvintpipe(dev, ep->bEndpointAddress),
224 buffer, buffer_len,
225 int_irq, (void *)gspca_dev, interval);
226 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
227 ret = usb_submit_urb(urb, GFP_KERNEL);
228 if (ret < 0) {
229 PERR("submit int URB failed with error %i", ret);
230 goto error_submit;
231 }
232 gspca_dev->int_urb = urb;
233 return ret;
234
235error_submit:
236 usb_free_coherent(dev,
237 urb->transfer_buffer_length,
238 urb->transfer_buffer,
239 urb->transfer_dma);
240error_buffer:
241 usb_free_urb(urb);
242error:
243 return ret;
244}
245
246static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
247{
248 struct usb_interface *intf;
249 struct usb_host_interface *intf_desc;
250 struct usb_endpoint_descriptor *ep;
251 int i;
252
253 if (gspca_dev->sd_desc->int_pkt_scan) {
254 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
255 intf_desc = intf->cur_altsetting;
256 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
257 ep = &intf_desc->endpoint[i].desc;
258 if (usb_endpoint_dir_in(ep) &&
259 usb_endpoint_xfer_int(ep)) {
260
261 alloc_and_submit_int_urb(gspca_dev, ep);
262 break;
263 }
264 }
265 }
266}
267
268static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
269{
270 struct urb *urb;
271
272 urb = gspca_dev->int_urb;
273 if (urb) {
274 gspca_dev->int_urb = NULL;
275 usb_kill_urb(urb);
276 usb_free_coherent(gspca_dev->dev,
277 urb->transfer_buffer_length,
278 urb->transfer_buffer,
279 urb->transfer_dma);
280 usb_free_urb(urb);
281 }
282}
283#else
284static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
285{
286}
287
288static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
289{
290}
291
292static inline int gspca_input_connect(struct gspca_dev *dev)
293{
294 return 0;
295}
296#endif
297
298
299
300
301static void fill_frame(struct gspca_dev *gspca_dev,
302 struct urb *urb)
303{
304 u8 *data;
305 int i, len, st;
306 cam_pkt_op pkt_scan;
307
308 if (urb->status != 0) {
309 if (urb->status == -ESHUTDOWN)
310 return;
311#ifdef CONFIG_PM
312 if (gspca_dev->frozen)
313 return;
314#endif
315 PERR("urb status: %d", urb->status);
316 urb->status = 0;
317 goto resubmit;
318 }
319 pkt_scan = gspca_dev->sd_desc->pkt_scan;
320 for (i = 0; i < urb->number_of_packets; i++) {
321 len = urb->iso_frame_desc[i].actual_length;
322
323
324 st = urb->iso_frame_desc[i].status;
325 if (st) {
326 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
327 i, len, st);
328 gspca_dev->last_packet_type = DISCARD_PACKET;
329 continue;
330 }
331 if (len == 0) {
332 if (gspca_dev->empty_packet == 0)
333 gspca_dev->empty_packet = 1;
334 continue;
335 }
336
337
338 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
339 i, urb->iso_frame_desc[i].offset, len);
340 data = (u8 *) urb->transfer_buffer
341 + urb->iso_frame_desc[i].offset;
342 pkt_scan(gspca_dev, data, len);
343 }
344
345resubmit:
346
347 st = usb_submit_urb(urb, GFP_ATOMIC);
348 if (st < 0)
349 pr_err("usb_submit_urb() ret %d\n", st);
350}
351
352
353
354
355
356
357static void isoc_irq(struct urb *urb)
358{
359 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
360
361 PDEBUG(D_PACK, "isoc irq");
362 if (!gspca_dev->streaming)
363 return;
364 fill_frame(gspca_dev, urb);
365}
366
367
368
369
370static void bulk_irq(struct urb *urb)
371{
372 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
373 int st;
374
375 PDEBUG(D_PACK, "bulk irq");
376 if (!gspca_dev->streaming)
377 return;
378 switch (urb->status) {
379 case 0:
380 break;
381 case -ESHUTDOWN:
382 return;
383 default:
384#ifdef CONFIG_PM
385 if (gspca_dev->frozen)
386 return;
387#endif
388 PERR("urb status: %d", urb->status);
389 urb->status = 0;
390 goto resubmit;
391 }
392
393 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
394 gspca_dev->sd_desc->pkt_scan(gspca_dev,
395 urb->transfer_buffer,
396 urb->actual_length);
397
398resubmit:
399
400 if (gspca_dev->cam.bulk_nurbs != 0) {
401 st = usb_submit_urb(urb, GFP_ATOMIC);
402 if (st < 0)
403 pr_err("usb_submit_urb() ret %d\n", st);
404 }
405}
406
407
408
409
410
411
412
413
414
415
416
417
418void gspca_frame_add(struct gspca_dev *gspca_dev,
419 enum gspca_packet_type packet_type,
420 const u8 *data,
421 int len)
422{
423 struct gspca_frame *frame;
424 int i, j;
425
426 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
427
428 if (packet_type == FIRST_PACKET) {
429 i = atomic_read(&gspca_dev->fr_i);
430
431
432 if (i == atomic_read(&gspca_dev->fr_q)) {
433 gspca_dev->last_packet_type = DISCARD_PACKET;
434 gspca_dev->sequence++;
435 return;
436 }
437 j = gspca_dev->fr_queue[i];
438 frame = &gspca_dev->frame[j];
439 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
440 frame->v4l2_buf.sequence = gspca_dev->sequence++;
441 gspca_dev->image = frame->data;
442 gspca_dev->image_len = 0;
443 } else {
444 switch (gspca_dev->last_packet_type) {
445 case DISCARD_PACKET:
446 if (packet_type == LAST_PACKET) {
447 gspca_dev->last_packet_type = packet_type;
448 gspca_dev->image = NULL;
449 gspca_dev->image_len = 0;
450 }
451 return;
452 case LAST_PACKET:
453 return;
454 }
455 }
456
457
458 if (len > 0) {
459 if (gspca_dev->image_len + len > gspca_dev->frsz) {
460 PERR("frame overflow %d > %d",
461 gspca_dev->image_len + len,
462 gspca_dev->frsz);
463 packet_type = DISCARD_PACKET;
464 } else {
465
466
467
468
469
470
471 memcpy(gspca_dev->image + gspca_dev->image_len,
472 data, len);
473 gspca_dev->image_len += len;
474 }
475 }
476 gspca_dev->last_packet_type = packet_type;
477
478
479
480
481 if (packet_type == LAST_PACKET) {
482 i = atomic_read(&gspca_dev->fr_i);
483 j = gspca_dev->fr_queue[i];
484 frame = &gspca_dev->frame[j];
485 frame->v4l2_buf.bytesused = gspca_dev->image_len;
486 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
487 | V4L2_BUF_FLAG_DONE)
488 & ~V4L2_BUF_FLAG_QUEUED;
489 i = (i + 1) % GSPCA_MAX_FRAMES;
490 atomic_set(&gspca_dev->fr_i, i);
491 wake_up_interruptible(&gspca_dev->wq);
492 PDEBUG(D_FRAM, "frame complete len:%d",
493 frame->v4l2_buf.bytesused);
494 gspca_dev->image = NULL;
495 gspca_dev->image_len = 0;
496 }
497}
498EXPORT_SYMBOL(gspca_frame_add);
499
500static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
501 enum v4l2_memory memory, unsigned int count)
502{
503 struct gspca_frame *frame;
504 unsigned int frsz;
505 int i;
506
507 i = gspca_dev->curr_mode;
508 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
509 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
510 frsz = PAGE_ALIGN(frsz);
511 if (count >= GSPCA_MAX_FRAMES)
512 count = GSPCA_MAX_FRAMES - 1;
513 gspca_dev->frbuf = vmalloc_32(frsz * count);
514 if (!gspca_dev->frbuf) {
515 pr_err("frame alloc failed\n");
516 return -ENOMEM;
517 }
518 gspca_dev->capt_file = file;
519 gspca_dev->memory = memory;
520 gspca_dev->frsz = frsz;
521 gspca_dev->nframes = count;
522 for (i = 0; i < count; i++) {
523 frame = &gspca_dev->frame[i];
524 frame->v4l2_buf.index = i;
525 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
526 frame->v4l2_buf.flags = 0;
527 frame->v4l2_buf.field = V4L2_FIELD_NONE;
528 frame->v4l2_buf.length = frsz;
529 frame->v4l2_buf.memory = memory;
530 frame->v4l2_buf.sequence = 0;
531 frame->data = gspca_dev->frbuf + i * frsz;
532 frame->v4l2_buf.m.offset = i * frsz;
533 }
534 atomic_set(&gspca_dev->fr_q, 0);
535 atomic_set(&gspca_dev->fr_i, 0);
536 gspca_dev->fr_o = 0;
537 return 0;
538}
539
540static void frame_free(struct gspca_dev *gspca_dev)
541{
542 int i;
543
544 PDEBUG(D_STREAM, "frame free");
545 if (gspca_dev->frbuf != NULL) {
546 vfree(gspca_dev->frbuf);
547 gspca_dev->frbuf = NULL;
548 for (i = 0; i < gspca_dev->nframes; i++)
549 gspca_dev->frame[i].data = NULL;
550 }
551 gspca_dev->nframes = 0;
552 gspca_dev->frsz = 0;
553 gspca_dev->capt_file = NULL;
554 gspca_dev->memory = GSPCA_MEMORY_NO;
555}
556
557static void destroy_urbs(struct gspca_dev *gspca_dev)
558{
559 struct urb *urb;
560 unsigned int i;
561
562 PDEBUG(D_STREAM, "kill transfer");
563 for (i = 0; i < MAX_NURBS; i++) {
564 urb = gspca_dev->urb[i];
565 if (urb == NULL)
566 break;
567
568 gspca_dev->urb[i] = NULL;
569 usb_kill_urb(urb);
570 usb_free_coherent(gspca_dev->dev,
571 urb->transfer_buffer_length,
572 urb->transfer_buffer,
573 urb->transfer_dma);
574 usb_free_urb(urb);
575 }
576}
577
578static int gspca_set_alt0(struct gspca_dev *gspca_dev)
579{
580 int ret;
581
582 if (gspca_dev->alt == 0)
583 return 0;
584 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
585 if (ret < 0)
586 pr_err("set alt 0 err %d\n", ret);
587 return ret;
588}
589
590
591static void gspca_stream_off(struct gspca_dev *gspca_dev)
592{
593 gspca_dev->streaming = 0;
594 gspca_dev->usb_err = 0;
595 if (gspca_dev->sd_desc->stopN)
596 gspca_dev->sd_desc->stopN(gspca_dev);
597 destroy_urbs(gspca_dev);
598 gspca_input_destroy_urb(gspca_dev);
599 gspca_set_alt0(gspca_dev);
600 gspca_input_create_urb(gspca_dev);
601 if (gspca_dev->sd_desc->stop0)
602 gspca_dev->sd_desc->stop0(gspca_dev);
603 PDEBUG(D_STREAM, "stream off OK");
604}
605
606
607
608
609static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
610 int xfer)
611{
612 struct usb_host_endpoint *ep;
613 int i, attr;
614
615 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
616 ep = &alt->endpoint[i];
617 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
618 if (attr == xfer
619 && ep->desc.wMaxPacketSize != 0
620 && usb_endpoint_dir_in(&ep->desc))
621 return ep;
622 }
623 return NULL;
624}
625
626
627static u32 which_bandwidth(struct gspca_dev *gspca_dev)
628{
629 u32 bandwidth;
630 int i;
631
632
633 i = gspca_dev->curr_mode;
634 bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
635
636
637 if (!gspca_dev->cam.needs_full_bandwidth &&
638 bandwidth < gspca_dev->cam.cam_mode[i].width *
639 gspca_dev->cam.cam_mode[i].height)
640 bandwidth = bandwidth * 3 / 8;
641
642
643 if (gspca_dev->sd_desc->get_streamparm) {
644 struct v4l2_streamparm parm;
645
646 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
647 bandwidth *= parm.parm.capture.timeperframe.denominator;
648 bandwidth /= parm.parm.capture.timeperframe.numerator;
649 } else {
650
651
652
653 if (gspca_dev->width >= 640
654 && gspca_dev->dev->speed == USB_SPEED_FULL)
655 bandwidth *= 15;
656 else
657 bandwidth *= 30;
658 }
659
660 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
661 return bandwidth;
662}
663
664
665#define MAX_ALT 16
666struct ep_tb_s {
667 u32 alt;
668 u32 bandwidth;
669};
670
671
672
673
674
675static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
676 struct usb_interface *intf,
677 struct ep_tb_s *ep_tb)
678{
679 struct usb_host_endpoint *ep;
680 int i, j, nbalt, psize, found;
681 u32 bandwidth, last_bw;
682
683 nbalt = intf->num_altsetting;
684 if (nbalt > MAX_ALT)
685 nbalt = MAX_ALT;
686
687
688 i = 0;
689 last_bw = 0;
690 for (;;) {
691 ep_tb->bandwidth = 2000 * 2000 * 120;
692 found = 0;
693 for (j = 0; j < nbalt; j++) {
694 ep = alt_xfer(&intf->altsetting[j],
695 USB_ENDPOINT_XFER_ISOC);
696 if (ep == NULL)
697 continue;
698 if (ep->desc.bInterval == 0) {
699 pr_err("alt %d iso endp with 0 interval\n", j);
700 continue;
701 }
702 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
703 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
704 bandwidth = psize * 1000;
705 if (gspca_dev->dev->speed == USB_SPEED_HIGH
706 || gspca_dev->dev->speed == USB_SPEED_SUPER)
707 bandwidth *= 8;
708 bandwidth /= 1 << (ep->desc.bInterval - 1);
709 if (bandwidth <= last_bw)
710 continue;
711 if (bandwidth < ep_tb->bandwidth) {
712 ep_tb->bandwidth = bandwidth;
713 ep_tb->alt = j;
714 found = 1;
715 }
716 }
717 if (!found)
718 break;
719 PDEBUG(D_STREAM, "alt %d bandwidth %d",
720 ep_tb->alt, ep_tb->bandwidth);
721 last_bw = ep_tb->bandwidth;
722 i++;
723 ep_tb++;
724 }
725
726
727
728
729
730
731
732
733
734 if (gspca_dev->audio &&
735 gspca_dev->dev->speed == USB_SPEED_FULL &&
736 last_bw >= 1000000 &&
737 i > 1) {
738 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
739 i--;
740 ep_tb--;
741 }
742
743
744 bandwidth = which_bandwidth(gspca_dev);
745 ep_tb--;
746 while (i > 1) {
747 ep_tb--;
748 if (ep_tb->bandwidth < bandwidth)
749 break;
750 i--;
751 }
752 return i;
753}
754
755
756
757
758static int create_urbs(struct gspca_dev *gspca_dev,
759 struct usb_host_endpoint *ep)
760{
761 struct urb *urb;
762 int n, nurbs, i, psize, npkt, bsize;
763
764
765 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
766
767 if (!gspca_dev->cam.bulk) {
768
769
770 if (gspca_dev->pkt_size == 0)
771 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
772 else
773 psize = gspca_dev->pkt_size;
774 npkt = gspca_dev->cam.npkt;
775 if (npkt == 0)
776 npkt = 32;
777 bsize = psize * npkt;
778 PDEBUG(D_STREAM,
779 "isoc %d pkts size %d = bsize:%d",
780 npkt, psize, bsize);
781 nurbs = DEF_NURBS;
782 } else {
783 npkt = 0;
784 bsize = gspca_dev->cam.bulk_size;
785 if (bsize == 0)
786 bsize = psize;
787 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
788 if (gspca_dev->cam.bulk_nurbs != 0)
789 nurbs = gspca_dev->cam.bulk_nurbs;
790 else
791 nurbs = 1;
792 }
793
794 for (n = 0; n < nurbs; n++) {
795 urb = usb_alloc_urb(npkt, GFP_KERNEL);
796 if (!urb) {
797 pr_err("usb_alloc_urb failed\n");
798 return -ENOMEM;
799 }
800 gspca_dev->urb[n] = urb;
801 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
802 bsize,
803 GFP_KERNEL,
804 &urb->transfer_dma);
805
806 if (urb->transfer_buffer == NULL) {
807 pr_err("usb_alloc_coherent failed\n");
808 return -ENOMEM;
809 }
810 urb->dev = gspca_dev->dev;
811 urb->context = gspca_dev;
812 urb->transfer_buffer_length = bsize;
813 if (npkt != 0) {
814 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
815 ep->desc.bEndpointAddress);
816 urb->transfer_flags = URB_ISO_ASAP
817 | URB_NO_TRANSFER_DMA_MAP;
818 urb->interval = 1 << (ep->desc.bInterval - 1);
819 urb->complete = isoc_irq;
820 urb->number_of_packets = npkt;
821 for (i = 0; i < npkt; i++) {
822 urb->iso_frame_desc[i].length = psize;
823 urb->iso_frame_desc[i].offset = psize * i;
824 }
825 } else {
826 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
827 ep->desc.bEndpointAddress);
828 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
829 urb->complete = bulk_irq;
830 }
831 }
832 return 0;
833}
834
835
836
837
838static int gspca_init_transfer(struct gspca_dev *gspca_dev)
839{
840 struct usb_interface *intf;
841 struct usb_host_endpoint *ep;
842 struct urb *urb;
843 struct ep_tb_s ep_tb[MAX_ALT];
844 int n, ret, xfer, alt, alt_idx;
845
846
847 gspca_dev->image = NULL;
848 gspca_dev->image_len = 0;
849 gspca_dev->last_packet_type = DISCARD_PACKET;
850 gspca_dev->sequence = 0;
851
852 gspca_dev->usb_err = 0;
853
854
855 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
856 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
857 if (gspca_dev->sd_desc->isoc_init) {
858 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
859 if (ret < 0)
860 return ret;
861 }
862 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
863 : USB_ENDPOINT_XFER_ISOC;
864
865
866 if (gspca_dev->alt != 0) {
867 gspca_dev->alt--;
868 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
869 if (ep == NULL) {
870 pr_err("bad altsetting %d\n", gspca_dev->alt);
871 return -EIO;
872 }
873 ep_tb[0].alt = gspca_dev->alt;
874 alt_idx = 1;
875 } else {
876
877
878
879 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
880 if (alt_idx <= 0) {
881 pr_err("no transfer endpoint found\n");
882 return -EIO;
883 }
884 }
885
886
887
888 gspca_input_destroy_urb(gspca_dev);
889
890 gspca_dev->alt = ep_tb[--alt_idx].alt;
891 alt = -1;
892 for (;;) {
893 if (alt != gspca_dev->alt) {
894 alt = gspca_dev->alt;
895 if (intf->num_altsetting > 1) {
896 ret = usb_set_interface(gspca_dev->dev,
897 gspca_dev->iface,
898 alt);
899 if (ret < 0) {
900 if (ret == -ENOSPC)
901 goto retry;
902 pr_err("set alt %d err %d\n", alt, ret);
903 goto out;
904 }
905 }
906 }
907 if (!gspca_dev->cam.no_urb_create) {
908 PDEBUG(D_STREAM, "init transfer alt %d", alt);
909 ret = create_urbs(gspca_dev,
910 alt_xfer(&intf->altsetting[alt], xfer));
911 if (ret < 0) {
912 destroy_urbs(gspca_dev);
913 goto out;
914 }
915 }
916
917
918 if (gspca_dev->cam.bulk)
919 usb_clear_halt(gspca_dev->dev,
920 gspca_dev->urb[0]->pipe);
921
922
923 ret = gspca_dev->sd_desc->start(gspca_dev);
924 if (ret < 0) {
925 destroy_urbs(gspca_dev);
926 goto out;
927 }
928 gspca_dev->streaming = 1;
929 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
930
931
932 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
933 break;
934
935
936 for (n = 0; n < MAX_NURBS; n++) {
937 urb = gspca_dev->urb[n];
938 if (urb == NULL)
939 break;
940 ret = usb_submit_urb(urb, GFP_KERNEL);
941 if (ret < 0)
942 break;
943 }
944 if (ret >= 0)
945 break;
946
947
948
949 gspca_stream_off(gspca_dev);
950 if (ret != -ENOSPC) {
951 pr_err("usb_submit_urb alt %d err %d\n",
952 gspca_dev->alt, ret);
953 goto out;
954 }
955
956
957
958retry:
959 PERR("alt %d - bandwidth not wide enough, trying again", alt);
960 msleep(20);
961 if (gspca_dev->sd_desc->isoc_nego) {
962 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
963 if (ret < 0)
964 goto out;
965 } else {
966 if (alt_idx <= 0) {
967 pr_err("no transfer endpoint found\n");
968 ret = -EIO;
969 goto out;
970 }
971 gspca_dev->alt = ep_tb[--alt_idx].alt;
972 }
973 }
974out:
975 gspca_input_create_urb(gspca_dev);
976 return ret;
977}
978
979static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
980{
981 int i;
982
983 i = gspca_dev->cam.nmodes - 1;
984 gspca_dev->curr_mode = i;
985 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
986 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
987 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
988
989
990 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
991}
992
993static int wxh_to_mode(struct gspca_dev *gspca_dev,
994 int width, int height)
995{
996 int i;
997
998 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
999 if (width >= gspca_dev->cam.cam_mode[i].width
1000 && height >= gspca_dev->cam.cam_mode[i].height)
1001 break;
1002 }
1003 return i;
1004}
1005
1006
1007
1008
1009static int gspca_get_mode(struct gspca_dev *gspca_dev,
1010 int mode,
1011 int pixfmt)
1012{
1013 int modeU, modeD;
1014
1015 modeU = modeD = mode;
1016 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1017 if (--modeD >= 0) {
1018 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1019 == pixfmt)
1020 return modeD;
1021 }
1022 if (++modeU < gspca_dev->cam.nmodes) {
1023 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1024 == pixfmt)
1025 return modeU;
1026 }
1027 }
1028 return -EINVAL;
1029}
1030
1031#ifdef CONFIG_VIDEO_ADV_DEBUG
1032static int vidioc_g_chip_info(struct file *file, void *priv,
1033 struct v4l2_dbg_chip_info *chip)
1034{
1035 struct gspca_dev *gspca_dev = video_drvdata(file);
1036
1037 gspca_dev->usb_err = 0;
1038 if (gspca_dev->sd_desc->get_chip_info)
1039 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
1040 return chip->match.addr ? -EINVAL : 0;
1041}
1042
1043static int vidioc_g_register(struct file *file, void *priv,
1044 struct v4l2_dbg_register *reg)
1045{
1046 struct gspca_dev *gspca_dev = video_drvdata(file);
1047
1048 gspca_dev->usb_err = 0;
1049 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
1050}
1051
1052static int vidioc_s_register(struct file *file, void *priv,
1053 const struct v4l2_dbg_register *reg)
1054{
1055 struct gspca_dev *gspca_dev = video_drvdata(file);
1056
1057 gspca_dev->usb_err = 0;
1058 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
1059}
1060#endif
1061
1062static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1063 struct v4l2_fmtdesc *fmtdesc)
1064{
1065 struct gspca_dev *gspca_dev = video_drvdata(file);
1066 int i, j, index;
1067 __u32 fmt_tb[8];
1068
1069
1070 index = 0;
1071 j = 0;
1072 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1073 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1074 j = 0;
1075 for (;;) {
1076 if (fmt_tb[j] == fmt_tb[index])
1077 break;
1078 j++;
1079 }
1080 if (j == index) {
1081 if (fmtdesc->index == index)
1082 break;
1083 index++;
1084 if (index >= ARRAY_SIZE(fmt_tb))
1085 return -EINVAL;
1086 }
1087 }
1088 if (i < 0)
1089 return -EINVAL;
1090
1091 fmtdesc->pixelformat = fmt_tb[index];
1092 if (gspca_dev->cam.cam_mode[i].sizeimage <
1093 gspca_dev->cam.cam_mode[i].width *
1094 gspca_dev->cam.cam_mode[i].height)
1095 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1096 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1097 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1098 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1099 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1100 fmtdesc->description[4] = '\0';
1101 return 0;
1102}
1103
1104static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1105 struct v4l2_format *fmt)
1106{
1107 struct gspca_dev *gspca_dev = video_drvdata(file);
1108 int mode;
1109
1110 mode = gspca_dev->curr_mode;
1111 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1112
1113
1114 fmt->fmt.pix.priv = 0;
1115 return 0;
1116}
1117
1118static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1119 struct v4l2_format *fmt)
1120{
1121 int w, h, mode, mode2;
1122
1123 w = fmt->fmt.pix.width;
1124 h = fmt->fmt.pix.height;
1125
1126 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1127 fmt->fmt.pix.pixelformat, w, h);
1128
1129
1130 mode = wxh_to_mode(gspca_dev, w, h);
1131
1132
1133 if (gspca_dev->cam.cam_mode[mode].pixelformat
1134 != fmt->fmt.pix.pixelformat) {
1135
1136
1137 mode2 = gspca_get_mode(gspca_dev, mode,
1138 fmt->fmt.pix.pixelformat);
1139 if (mode2 >= 0)
1140 mode = mode2;
1141 }
1142 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1143
1144
1145 fmt->fmt.pix.priv = 0;
1146 return mode;
1147}
1148
1149static int vidioc_try_fmt_vid_cap(struct file *file,
1150 void *priv,
1151 struct v4l2_format *fmt)
1152{
1153 struct gspca_dev *gspca_dev = video_drvdata(file);
1154 int ret;
1155
1156 ret = try_fmt_vid_cap(gspca_dev, fmt);
1157 if (ret < 0)
1158 return ret;
1159 return 0;
1160}
1161
1162static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1163 struct v4l2_format *fmt)
1164{
1165 struct gspca_dev *gspca_dev = video_drvdata(file);
1166 int ret;
1167
1168 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1169 return -ERESTARTSYS;
1170
1171 ret = try_fmt_vid_cap(gspca_dev, fmt);
1172 if (ret < 0)
1173 goto out;
1174
1175 if (gspca_dev->nframes != 0
1176 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1177 ret = -EINVAL;
1178 goto out;
1179 }
1180
1181 if (ret == gspca_dev->curr_mode) {
1182 ret = 0;
1183 goto out;
1184 }
1185
1186 if (gspca_dev->streaming) {
1187 ret = -EBUSY;
1188 goto out;
1189 }
1190 gspca_dev->width = fmt->fmt.pix.width;
1191 gspca_dev->height = fmt->fmt.pix.height;
1192 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1193 gspca_dev->curr_mode = ret;
1194
1195 ret = 0;
1196out:
1197 mutex_unlock(&gspca_dev->queue_lock);
1198 return ret;
1199}
1200
1201static int vidioc_enum_framesizes(struct file *file, void *priv,
1202 struct v4l2_frmsizeenum *fsize)
1203{
1204 struct gspca_dev *gspca_dev = video_drvdata(file);
1205 int i;
1206 __u32 index = 0;
1207
1208 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1209 if (fsize->pixel_format !=
1210 gspca_dev->cam.cam_mode[i].pixelformat)
1211 continue;
1212
1213 if (fsize->index == index) {
1214 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1215 fsize->discrete.width =
1216 gspca_dev->cam.cam_mode[i].width;
1217 fsize->discrete.height =
1218 gspca_dev->cam.cam_mode[i].height;
1219 return 0;
1220 }
1221 index++;
1222 }
1223
1224 return -EINVAL;
1225}
1226
1227static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1228 struct v4l2_frmivalenum *fival)
1229{
1230 struct gspca_dev *gspca_dev = video_drvdata(filp);
1231 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1232 __u32 i;
1233
1234 if (gspca_dev->cam.mode_framerates == NULL ||
1235 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1236 return -EINVAL;
1237
1238 if (fival->pixel_format !=
1239 gspca_dev->cam.cam_mode[mode].pixelformat)
1240 return -EINVAL;
1241
1242 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1243 if (fival->index == i) {
1244 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1245 fival->discrete.numerator = 1;
1246 fival->discrete.denominator =
1247 gspca_dev->cam.mode_framerates[mode].rates[i];
1248 return 0;
1249 }
1250 }
1251
1252 return -EINVAL;
1253}
1254
1255static void gspca_release(struct v4l2_device *v4l2_device)
1256{
1257 struct gspca_dev *gspca_dev =
1258 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1259
1260 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1261 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1262 kfree(gspca_dev->usb_buf);
1263 kfree(gspca_dev);
1264}
1265
1266static int dev_open(struct file *file)
1267{
1268 struct gspca_dev *gspca_dev = video_drvdata(file);
1269 int ret;
1270
1271 PDEBUG(D_STREAM, "[%s] open", current->comm);
1272
1273
1274 if (!try_module_get(gspca_dev->module))
1275 return -ENODEV;
1276
1277 ret = v4l2_fh_open(file);
1278 if (ret)
1279 module_put(gspca_dev->module);
1280 return ret;
1281}
1282
1283static int dev_close(struct file *file)
1284{
1285 struct gspca_dev *gspca_dev = video_drvdata(file);
1286
1287 PDEBUG(D_STREAM, "[%s] close", current->comm);
1288
1289
1290 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1291 return -ERESTARTSYS;
1292
1293 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
1294 mutex_unlock(&gspca_dev->usb_lock);
1295 return -ERESTARTSYS;
1296 }
1297
1298
1299 if (gspca_dev->capt_file == file) {
1300 if (gspca_dev->streaming)
1301 gspca_stream_off(gspca_dev);
1302 frame_free(gspca_dev);
1303 }
1304 module_put(gspca_dev->module);
1305 mutex_unlock(&gspca_dev->queue_lock);
1306 mutex_unlock(&gspca_dev->usb_lock);
1307
1308 PDEBUG(D_STREAM, "close done");
1309
1310 return v4l2_fh_release(file);
1311}
1312
1313static int vidioc_querycap(struct file *file, void *priv,
1314 struct v4l2_capability *cap)
1315{
1316 struct gspca_dev *gspca_dev = video_drvdata(file);
1317
1318 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
1319 sizeof cap->driver);
1320 if (gspca_dev->dev->product != NULL) {
1321 strlcpy((char *) cap->card, gspca_dev->dev->product,
1322 sizeof cap->card);
1323 } else {
1324 snprintf((char *) cap->card, sizeof cap->card,
1325 "USB Camera (%04x:%04x)",
1326 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1327 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1328 }
1329 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1330 sizeof(cap->bus_info));
1331 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1332 | V4L2_CAP_STREAMING
1333 | V4L2_CAP_READWRITE;
1334 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1335 return 0;
1336}
1337
1338static int vidioc_enum_input(struct file *file, void *priv,
1339 struct v4l2_input *input)
1340{
1341 struct gspca_dev *gspca_dev = video_drvdata(file);
1342
1343 if (input->index != 0)
1344 return -EINVAL;
1345 input->type = V4L2_INPUT_TYPE_CAMERA;
1346 input->status = gspca_dev->cam.input_flags;
1347 strlcpy(input->name, gspca_dev->sd_desc->name,
1348 sizeof input->name);
1349 return 0;
1350}
1351
1352static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1353{
1354 *i = 0;
1355 return 0;
1356}
1357
1358static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1359{
1360 if (i > 0)
1361 return -EINVAL;
1362 return (0);
1363}
1364
1365static int vidioc_reqbufs(struct file *file, void *priv,
1366 struct v4l2_requestbuffers *rb)
1367{
1368 struct gspca_dev *gspca_dev = video_drvdata(file);
1369 int i, ret = 0, streaming;
1370
1371 i = rb->memory;
1372 switch (i) {
1373 case GSPCA_MEMORY_READ:
1374 case V4L2_MEMORY_MMAP:
1375 case V4L2_MEMORY_USERPTR:
1376 break;
1377 default:
1378 return -EINVAL;
1379 }
1380 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1381 return -ERESTARTSYS;
1382
1383 if (gspca_dev->memory != GSPCA_MEMORY_NO
1384 && gspca_dev->memory != GSPCA_MEMORY_READ
1385 && gspca_dev->memory != rb->memory) {
1386 ret = -EBUSY;
1387 goto out;
1388 }
1389
1390
1391 if (gspca_dev->capt_file != NULL
1392 && gspca_dev->capt_file != file) {
1393 ret = -EBUSY;
1394 goto out;
1395 }
1396
1397
1398 for (i = 0; i < gspca_dev->nframes; i++) {
1399 if (gspca_dev->frame[i].vma_use_count) {
1400 ret = -EBUSY;
1401 goto out;
1402 }
1403 }
1404
1405
1406 streaming = gspca_dev->streaming;
1407 if (streaming) {
1408 gspca_stream_off(gspca_dev);
1409
1410
1411
1412 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1413 streaming = 0;
1414 }
1415
1416
1417 if (gspca_dev->nframes != 0)
1418 frame_free(gspca_dev);
1419 if (rb->count == 0)
1420 goto out;
1421 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
1422 if (ret == 0) {
1423 rb->count = gspca_dev->nframes;
1424 if (streaming)
1425 ret = gspca_init_transfer(gspca_dev);
1426 }
1427out:
1428 mutex_unlock(&gspca_dev->queue_lock);
1429 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1430 return ret;
1431}
1432
1433static int vidioc_querybuf(struct file *file, void *priv,
1434 struct v4l2_buffer *v4l2_buf)
1435{
1436 struct gspca_dev *gspca_dev = video_drvdata(file);
1437 struct gspca_frame *frame;
1438
1439 if (v4l2_buf->index >= gspca_dev->nframes)
1440 return -EINVAL;
1441
1442 frame = &gspca_dev->frame[v4l2_buf->index];
1443 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1444 return 0;
1445}
1446
1447static int vidioc_streamon(struct file *file, void *priv,
1448 enum v4l2_buf_type buf_type)
1449{
1450 struct gspca_dev *gspca_dev = video_drvdata(file);
1451 int ret;
1452
1453 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1454 return -EINVAL;
1455 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1456 return -ERESTARTSYS;
1457
1458
1459 if (gspca_dev->capt_file != file) {
1460 ret = -EBUSY;
1461 goto out;
1462 }
1463
1464 if (gspca_dev->nframes == 0
1465 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
1466 ret = -EINVAL;
1467 goto out;
1468 }
1469 if (!gspca_dev->streaming) {
1470 ret = gspca_init_transfer(gspca_dev);
1471 if (ret < 0)
1472 goto out;
1473 }
1474 PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK", gspca_dev->pixfmt,
1475 gspca_dev->width, gspca_dev->height);
1476 ret = 0;
1477out:
1478 mutex_unlock(&gspca_dev->queue_lock);
1479 return ret;
1480}
1481
1482static int vidioc_streamoff(struct file *file, void *priv,
1483 enum v4l2_buf_type buf_type)
1484{
1485 struct gspca_dev *gspca_dev = video_drvdata(file);
1486 int i, ret;
1487
1488 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1489 return -EINVAL;
1490
1491 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1492 return -ERESTARTSYS;
1493
1494 if (!gspca_dev->streaming) {
1495 ret = 0;
1496 goto out;
1497 }
1498
1499
1500 if (gspca_dev->capt_file != file) {
1501 ret = -EBUSY;
1502 goto out;
1503 }
1504
1505
1506 gspca_stream_off(gspca_dev);
1507
1508 wake_up_interruptible(&gspca_dev->wq);
1509
1510
1511 for (i = 0; i < gspca_dev->nframes; i++)
1512 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1513 atomic_set(&gspca_dev->fr_q, 0);
1514 atomic_set(&gspca_dev->fr_i, 0);
1515 gspca_dev->fr_o = 0;
1516 ret = 0;
1517out:
1518 mutex_unlock(&gspca_dev->queue_lock);
1519 return ret;
1520}
1521
1522static int vidioc_g_jpegcomp(struct file *file, void *priv,
1523 struct v4l2_jpegcompression *jpegcomp)
1524{
1525 struct gspca_dev *gspca_dev = video_drvdata(file);
1526
1527 gspca_dev->usb_err = 0;
1528 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1529}
1530
1531static int vidioc_s_jpegcomp(struct file *file, void *priv,
1532 const struct v4l2_jpegcompression *jpegcomp)
1533{
1534 struct gspca_dev *gspca_dev = video_drvdata(file);
1535
1536 gspca_dev->usb_err = 0;
1537 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1538}
1539
1540static int vidioc_g_parm(struct file *filp, void *priv,
1541 struct v4l2_streamparm *parm)
1542{
1543 struct gspca_dev *gspca_dev = video_drvdata(filp);
1544
1545 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1546
1547 if (gspca_dev->sd_desc->get_streamparm) {
1548 gspca_dev->usb_err = 0;
1549 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1550 return gspca_dev->usb_err;
1551 }
1552 return 0;
1553}
1554
1555static int vidioc_s_parm(struct file *filp, void *priv,
1556 struct v4l2_streamparm *parm)
1557{
1558 struct gspca_dev *gspca_dev = video_drvdata(filp);
1559 int n;
1560
1561 n = parm->parm.capture.readbuffers;
1562 if (n == 0 || n >= GSPCA_MAX_FRAMES)
1563 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1564 else
1565 gspca_dev->nbufread = n;
1566
1567 if (gspca_dev->sd_desc->set_streamparm) {
1568 gspca_dev->usb_err = 0;
1569 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1570 return gspca_dev->usb_err;
1571 }
1572
1573 return 0;
1574}
1575
1576static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1577{
1578 struct gspca_dev *gspca_dev = video_drvdata(file);
1579 struct gspca_frame *frame;
1580 struct page *page;
1581 unsigned long addr, start, size;
1582 int i, ret;
1583
1584 start = vma->vm_start;
1585 size = vma->vm_end - vma->vm_start;
1586 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1587
1588 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1589 return -ERESTARTSYS;
1590 if (gspca_dev->capt_file != file) {
1591 ret = -EINVAL;
1592 goto out;
1593 }
1594
1595 frame = NULL;
1596 for (i = 0; i < gspca_dev->nframes; ++i) {
1597 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1598 PDEBUG(D_STREAM, "mmap bad memory type");
1599 break;
1600 }
1601 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1602 == vma->vm_pgoff) {
1603 frame = &gspca_dev->frame[i];
1604 break;
1605 }
1606 }
1607 if (frame == NULL) {
1608 PDEBUG(D_STREAM, "mmap no frame buffer found");
1609 ret = -EINVAL;
1610 goto out;
1611 }
1612 if (size != frame->v4l2_buf.length) {
1613 PDEBUG(D_STREAM, "mmap bad size");
1614 ret = -EINVAL;
1615 goto out;
1616 }
1617
1618
1619
1620
1621
1622 vma->vm_flags |= VM_IO;
1623
1624 addr = (unsigned long) frame->data;
1625 while (size > 0) {
1626 page = vmalloc_to_page((void *) addr);
1627 ret = vm_insert_page(vma, start, page);
1628 if (ret < 0)
1629 goto out;
1630 start += PAGE_SIZE;
1631 addr += PAGE_SIZE;
1632 size -= PAGE_SIZE;
1633 }
1634
1635 vma->vm_ops = &gspca_vm_ops;
1636 vma->vm_private_data = frame;
1637 gspca_vm_open(vma);
1638 ret = 0;
1639out:
1640 mutex_unlock(&gspca_dev->queue_lock);
1641 return ret;
1642}
1643
1644static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1645 enum v4l2_memory memory)
1646{
1647 if (!gspca_dev->present)
1648 return -ENODEV;
1649 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1650 !gspca_dev->streaming)
1651 return -EINVAL;
1652
1653
1654 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1655}
1656
1657static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1658 enum v4l2_memory memory)
1659{
1660 int ret;
1661
1662 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1663 return -ERESTARTSYS;
1664 ret = frame_ready_nolock(gspca_dev, file, memory);
1665 mutex_unlock(&gspca_dev->queue_lock);
1666 return ret;
1667}
1668
1669
1670
1671
1672
1673
1674static int vidioc_dqbuf(struct file *file, void *priv,
1675 struct v4l2_buffer *v4l2_buf)
1676{
1677 struct gspca_dev *gspca_dev = video_drvdata(file);
1678 struct gspca_frame *frame;
1679 int i, j, ret;
1680
1681 PDEBUG(D_FRAM, "dqbuf");
1682
1683 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1684 return -ERESTARTSYS;
1685
1686 for (;;) {
1687 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1688 if (ret < 0)
1689 goto out;
1690 if (ret > 0)
1691 break;
1692
1693 mutex_unlock(&gspca_dev->queue_lock);
1694
1695 if (file->f_flags & O_NONBLOCK)
1696 return -EAGAIN;
1697
1698
1699 ret = wait_event_interruptible_timeout(gspca_dev->wq,
1700 frame_ready(gspca_dev, file, v4l2_buf->memory),
1701 msecs_to_jiffies(3000));
1702 if (ret < 0)
1703 return ret;
1704 if (ret == 0)
1705 return -EIO;
1706
1707 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1708 return -ERESTARTSYS;
1709 }
1710
1711 i = gspca_dev->fr_o;
1712 j = gspca_dev->fr_queue[i];
1713 frame = &gspca_dev->frame[j];
1714
1715 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
1716
1717 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1718 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1719 PDEBUG(D_FRAM, "dqbuf %d", j);
1720 ret = 0;
1721
1722 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
1723 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
1724 frame->data,
1725 frame->v4l2_buf.bytesused)) {
1726 PERR("dqbuf cp to user failed");
1727 ret = -EFAULT;
1728 }
1729 }
1730out:
1731 mutex_unlock(&gspca_dev->queue_lock);
1732
1733 if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
1734 mutex_lock(&gspca_dev->usb_lock);
1735 gspca_dev->usb_err = 0;
1736 if (gspca_dev->present)
1737 gspca_dev->sd_desc->dq_callback(gspca_dev);
1738 mutex_unlock(&gspca_dev->usb_lock);
1739 }
1740
1741 return ret;
1742}
1743
1744
1745
1746
1747
1748
1749
1750static int vidioc_qbuf(struct file *file, void *priv,
1751 struct v4l2_buffer *v4l2_buf)
1752{
1753 struct gspca_dev *gspca_dev = video_drvdata(file);
1754 struct gspca_frame *frame;
1755 int i, index, ret;
1756
1757 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
1758
1759 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1760 return -ERESTARTSYS;
1761
1762 index = v4l2_buf->index;
1763 if ((unsigned) index >= gspca_dev->nframes) {
1764 PDEBUG(D_FRAM,
1765 "qbuf idx %d >= %d", index, gspca_dev->nframes);
1766 ret = -EINVAL;
1767 goto out;
1768 }
1769 if (v4l2_buf->memory != gspca_dev->memory) {
1770 PDEBUG(D_FRAM, "qbuf bad memory type");
1771 ret = -EINVAL;
1772 goto out;
1773 }
1774
1775 frame = &gspca_dev->frame[index];
1776 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1777 PDEBUG(D_FRAM, "qbuf bad state");
1778 ret = -EINVAL;
1779 goto out;
1780 }
1781
1782 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
1783
1784 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
1785 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1786 frame->v4l2_buf.length = v4l2_buf->length;
1787 }
1788
1789
1790 i = atomic_read(&gspca_dev->fr_q);
1791 gspca_dev->fr_queue[i] = index;
1792 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
1793
1794 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1795 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1796 ret = 0;
1797out:
1798 mutex_unlock(&gspca_dev->queue_lock);
1799 return ret;
1800}
1801
1802
1803
1804
1805static int read_alloc(struct gspca_dev *gspca_dev,
1806 struct file *file)
1807{
1808 struct v4l2_buffer v4l2_buf;
1809 int i, ret;
1810
1811 PDEBUG(D_STREAM, "read alloc");
1812
1813 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1814 return -ERESTARTSYS;
1815
1816 if (gspca_dev->nframes == 0) {
1817 struct v4l2_requestbuffers rb;
1818
1819 memset(&rb, 0, sizeof rb);
1820 rb.count = gspca_dev->nbufread;
1821 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1822 rb.memory = GSPCA_MEMORY_READ;
1823 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1824 if (ret != 0) {
1825 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
1826 goto out;
1827 }
1828 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1829 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1830 v4l2_buf.memory = GSPCA_MEMORY_READ;
1831 for (i = 0; i < gspca_dev->nbufread; i++) {
1832 v4l2_buf.index = i;
1833 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1834 if (ret != 0) {
1835 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
1836 goto out;
1837 }
1838 }
1839 }
1840
1841
1842 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1843 if (ret != 0)
1844 PDEBUG(D_STREAM, "read streamon err %d", ret);
1845out:
1846 mutex_unlock(&gspca_dev->usb_lock);
1847 return ret;
1848}
1849
1850static unsigned int dev_poll(struct file *file, poll_table *wait)
1851{
1852 struct gspca_dev *gspca_dev = video_drvdata(file);
1853 unsigned long req_events = poll_requested_events(wait);
1854 int ret = 0;
1855
1856 PDEBUG(D_FRAM, "poll");
1857
1858 if (req_events & POLLPRI)
1859 ret |= v4l2_ctrl_poll(file, wait);
1860
1861 if (req_events & (POLLIN | POLLRDNORM)) {
1862
1863 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
1864 if (read_alloc(gspca_dev, file) != 0) {
1865 ret |= POLLERR;
1866 goto out;
1867 }
1868 }
1869
1870 poll_wait(file, &gspca_dev->wq, wait);
1871
1872
1873 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
1874 ret |= POLLERR;
1875 goto out;
1876 }
1877 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
1878 ret |= POLLIN | POLLRDNORM;
1879 mutex_unlock(&gspca_dev->queue_lock);
1880 }
1881
1882out:
1883 if (!gspca_dev->present)
1884 ret |= POLLHUP;
1885
1886 return ret;
1887}
1888
1889static ssize_t dev_read(struct file *file, char __user *data,
1890 size_t count, loff_t *ppos)
1891{
1892 struct gspca_dev *gspca_dev = video_drvdata(file);
1893 struct gspca_frame *frame;
1894 struct v4l2_buffer v4l2_buf;
1895 struct timeval timestamp;
1896 int n, ret, ret2;
1897
1898 PDEBUG(D_FRAM, "read (%zd)", count);
1899 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
1900 ret = read_alloc(gspca_dev, file);
1901 if (ret != 0)
1902 return ret;
1903 }
1904
1905
1906 timestamp = ktime_to_timeval(ktime_get());
1907 timestamp.tv_sec--;
1908 n = 2;
1909 for (;;) {
1910 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1911 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1912 v4l2_buf.memory = GSPCA_MEMORY_READ;
1913 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
1914 if (ret != 0) {
1915 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
1916 return ret;
1917 }
1918
1919
1920
1921 frame = &gspca_dev->frame[v4l2_buf.index];
1922 if (--n < 0)
1923 break;
1924 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
1925 break;
1926 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1927 if (ret != 0) {
1928 PDEBUG(D_STREAM, "read qbuf err %d", ret);
1929 return ret;
1930 }
1931 }
1932
1933
1934 if (count > frame->v4l2_buf.bytesused)
1935 count = frame->v4l2_buf.bytesused;
1936 ret = copy_to_user(data, frame->data, count);
1937 if (ret != 0) {
1938 PERR("read cp to user lack %d / %zd", ret, count);
1939 ret = -EFAULT;
1940 goto out;
1941 }
1942 ret = count;
1943out:
1944
1945 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1946 if (ret2 != 0)
1947 return ret2;
1948 return ret;
1949}
1950
1951static struct v4l2_file_operations dev_fops = {
1952 .owner = THIS_MODULE,
1953 .open = dev_open,
1954 .release = dev_close,
1955 .read = dev_read,
1956 .mmap = dev_mmap,
1957 .unlocked_ioctl = video_ioctl2,
1958 .poll = dev_poll,
1959};
1960
1961static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1962 .vidioc_querycap = vidioc_querycap,
1963 .vidioc_dqbuf = vidioc_dqbuf,
1964 .vidioc_qbuf = vidioc_qbuf,
1965 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1966 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1967 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1968 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1969 .vidioc_streamon = vidioc_streamon,
1970 .vidioc_enum_input = vidioc_enum_input,
1971 .vidioc_g_input = vidioc_g_input,
1972 .vidioc_s_input = vidioc_s_input,
1973 .vidioc_reqbufs = vidioc_reqbufs,
1974 .vidioc_querybuf = vidioc_querybuf,
1975 .vidioc_streamoff = vidioc_streamoff,
1976 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1977 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1978 .vidioc_g_parm = vidioc_g_parm,
1979 .vidioc_s_parm = vidioc_s_parm,
1980 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1981 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1982#ifdef CONFIG_VIDEO_ADV_DEBUG
1983 .vidioc_g_chip_info = vidioc_g_chip_info,
1984 .vidioc_g_register = vidioc_g_register,
1985 .vidioc_s_register = vidioc_s_register,
1986#endif
1987 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1988 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1989};
1990
1991static const struct video_device gspca_template = {
1992 .name = "gspca main driver",
1993 .fops = &dev_fops,
1994 .ioctl_ops = &dev_ioctl_ops,
1995 .release = video_device_release_empty,
1996};
1997
1998
1999
2000
2001
2002
2003
2004int gspca_dev_probe2(struct usb_interface *intf,
2005 const struct usb_device_id *id,
2006 const struct sd_desc *sd_desc,
2007 int dev_size,
2008 struct module *module)
2009{
2010 struct gspca_dev *gspca_dev;
2011 struct usb_device *dev = interface_to_usbdev(intf);
2012 int ret;
2013
2014 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2015 sd_desc->name, id->idVendor, id->idProduct);
2016
2017
2018 if (dev_size < sizeof *gspca_dev)
2019 dev_size = sizeof *gspca_dev;
2020 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
2021 if (!gspca_dev) {
2022 pr_err("couldn't kzalloc gspca struct\n");
2023 return -ENOMEM;
2024 }
2025 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2026 if (!gspca_dev->usb_buf) {
2027 pr_err("out of memory\n");
2028 ret = -ENOMEM;
2029 goto out;
2030 }
2031 gspca_dev->dev = dev;
2032 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
2033
2034
2035 if (dev->actconfig->desc.bNumInterfaces != 1) {
2036 int i;
2037 struct usb_interface *intf2;
2038
2039 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2040 intf2 = dev->actconfig->interface[i];
2041 if (intf2 != NULL
2042 && intf2->altsetting != NULL
2043 && intf2->altsetting->desc.bInterfaceClass ==
2044 USB_CLASS_AUDIO) {
2045 gspca_dev->audio = 1;
2046 break;
2047 }
2048 }
2049 }
2050
2051 gspca_dev->v4l2_dev.release = gspca_release;
2052 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2053 if (ret)
2054 goto out;
2055 gspca_dev->sd_desc = sd_desc;
2056 gspca_dev->nbufread = 2;
2057 gspca_dev->empty_packet = -1;
2058 gspca_dev->vdev = gspca_template;
2059 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
2060 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
2061 set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
2062 gspca_dev->module = module;
2063 gspca_dev->present = 1;
2064
2065 mutex_init(&gspca_dev->usb_lock);
2066 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
2067 mutex_init(&gspca_dev->queue_lock);
2068 init_waitqueue_head(&gspca_dev->wq);
2069
2070
2071 ret = sd_desc->config(gspca_dev, id);
2072 if (ret < 0)
2073 goto out;
2074 ret = sd_desc->init(gspca_dev);
2075 if (ret < 0)
2076 goto out;
2077 if (sd_desc->init_controls)
2078 ret = sd_desc->init_controls(gspca_dev);
2079 if (ret < 0)
2080 goto out;
2081 gspca_set_default_mode(gspca_dev);
2082
2083 ret = gspca_input_connect(gspca_dev);
2084 if (ret)
2085 goto out;
2086
2087
2088
2089
2090
2091
2092 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
2093 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
2094 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
2095#ifdef CONFIG_VIDEO_ADV_DEBUG
2096 if (!gspca_dev->sd_desc->get_register)
2097 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
2098 if (!gspca_dev->sd_desc->set_register)
2099 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
2100#endif
2101 if (!gspca_dev->sd_desc->get_jcomp)
2102 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
2103 if (!gspca_dev->sd_desc->set_jcomp)
2104 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
2105
2106
2107 ret = video_register_device(&gspca_dev->vdev,
2108 VFL_TYPE_GRABBER,
2109 -1);
2110 if (ret < 0) {
2111 pr_err("video_register_device err %d\n", ret);
2112 goto out;
2113 }
2114
2115 usb_set_intfdata(intf, gspca_dev);
2116 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
2117
2118 gspca_input_create_urb(gspca_dev);
2119
2120 return 0;
2121out:
2122#if IS_ENABLED(CONFIG_INPUT)
2123 if (gspca_dev->input_dev)
2124 input_unregister_device(gspca_dev->input_dev);
2125#endif
2126 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2127 kfree(gspca_dev->usb_buf);
2128 kfree(gspca_dev);
2129 return ret;
2130}
2131EXPORT_SYMBOL(gspca_dev_probe2);
2132
2133
2134int gspca_dev_probe(struct usb_interface *intf,
2135 const struct usb_device_id *id,
2136 const struct sd_desc *sd_desc,
2137 int dev_size,
2138 struct module *module)
2139{
2140 struct usb_device *dev = interface_to_usbdev(intf);
2141
2142
2143 if (dev->descriptor.bNumConfigurations != 1) {
2144 pr_err("%04x:%04x too many config\n",
2145 id->idVendor, id->idProduct);
2146 return -ENODEV;
2147 }
2148
2149
2150 if (dev->actconfig->desc.bNumInterfaces != 1
2151 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
2152 return -ENODEV;
2153
2154 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2155}
2156EXPORT_SYMBOL(gspca_dev_probe);
2157
2158
2159
2160
2161
2162
2163
2164void gspca_disconnect(struct usb_interface *intf)
2165{
2166 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2167#if IS_ENABLED(CONFIG_INPUT)
2168 struct input_dev *input_dev;
2169#endif
2170
2171 PDEBUG(D_PROBE, "%s disconnect",
2172 video_device_node_name(&gspca_dev->vdev));
2173
2174 mutex_lock(&gspca_dev->usb_lock);
2175
2176 gspca_dev->present = 0;
2177 destroy_urbs(gspca_dev);
2178
2179#if IS_ENABLED(CONFIG_INPUT)
2180 gspca_input_destroy_urb(gspca_dev);
2181 input_dev = gspca_dev->input_dev;
2182 if (input_dev) {
2183 gspca_dev->input_dev = NULL;
2184 input_unregister_device(input_dev);
2185 }
2186#endif
2187
2188 if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
2189 gspca_dev->sd_desc->stop0(gspca_dev);
2190 gspca_dev->streaming = 0;
2191 gspca_dev->dev = NULL;
2192 wake_up_interruptible(&gspca_dev->wq);
2193
2194 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
2195 video_unregister_device(&gspca_dev->vdev);
2196
2197 mutex_unlock(&gspca_dev->usb_lock);
2198
2199
2200 v4l2_device_put(&gspca_dev->v4l2_dev);
2201}
2202EXPORT_SYMBOL(gspca_disconnect);
2203
2204#ifdef CONFIG_PM
2205int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2206{
2207 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2208
2209 gspca_input_destroy_urb(gspca_dev);
2210
2211 if (!gspca_dev->streaming)
2212 return 0;
2213
2214 mutex_lock(&gspca_dev->usb_lock);
2215 gspca_dev->frozen = 1;
2216 gspca_dev->usb_err = 0;
2217 if (gspca_dev->sd_desc->stopN)
2218 gspca_dev->sd_desc->stopN(gspca_dev);
2219 destroy_urbs(gspca_dev);
2220 gspca_set_alt0(gspca_dev);
2221 if (gspca_dev->sd_desc->stop0)
2222 gspca_dev->sd_desc->stop0(gspca_dev);
2223 mutex_unlock(&gspca_dev->usb_lock);
2224
2225 return 0;
2226}
2227EXPORT_SYMBOL(gspca_suspend);
2228
2229int gspca_resume(struct usb_interface *intf)
2230{
2231 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2232 int streaming, ret = 0;
2233
2234 mutex_lock(&gspca_dev->usb_lock);
2235 gspca_dev->frozen = 0;
2236 gspca_dev->usb_err = 0;
2237 gspca_dev->sd_desc->init(gspca_dev);
2238
2239
2240
2241
2242
2243 streaming = gspca_dev->streaming;
2244 gspca_dev->streaming = 0;
2245 if (streaming)
2246 ret = gspca_init_transfer(gspca_dev);
2247 else
2248 gspca_input_create_urb(gspca_dev);
2249 mutex_unlock(&gspca_dev->usb_lock);
2250
2251 return ret;
2252}
2253EXPORT_SYMBOL(gspca_resume);
2254#endif
2255
2256
2257static int __init gspca_init(void)
2258{
2259 pr_info("v" GSPCA_VERSION " registered\n");
2260 return 0;
2261}
2262static void __exit gspca_exit(void)
2263{
2264}
2265
2266module_init(gspca_init);
2267module_exit(gspca_exit);
2268
2269module_param_named(debug, gspca_debug, int, 0644);
2270MODULE_PARM_DESC(debug,
2271 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
2272
