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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 frsz = gspca_dev->pixfmt.sizeimage;
508 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
509 frsz = PAGE_ALIGN(frsz);
510 if (count >= GSPCA_MAX_FRAMES)
511 count = GSPCA_MAX_FRAMES - 1;
512 gspca_dev->frbuf = vmalloc_32(frsz * count);
513 if (!gspca_dev->frbuf) {
514 pr_err("frame alloc failed\n");
515 return -ENOMEM;
516 }
517 gspca_dev->capt_file = file;
518 gspca_dev->memory = memory;
519 gspca_dev->frsz = frsz;
520 gspca_dev->nframes = count;
521 for (i = 0; i < count; i++) {
522 frame = &gspca_dev->frame[i];
523 frame->v4l2_buf.index = i;
524 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
525 frame->v4l2_buf.flags = 0;
526 frame->v4l2_buf.field = V4L2_FIELD_NONE;
527 frame->v4l2_buf.length = frsz;
528 frame->v4l2_buf.memory = memory;
529 frame->v4l2_buf.sequence = 0;
530 frame->data = gspca_dev->frbuf + i * frsz;
531 frame->v4l2_buf.m.offset = i * frsz;
532 }
533 atomic_set(&gspca_dev->fr_q, 0);
534 atomic_set(&gspca_dev->fr_i, 0);
535 gspca_dev->fr_o = 0;
536 return 0;
537}
538
539static void frame_free(struct gspca_dev *gspca_dev)
540{
541 int i;
542
543 PDEBUG(D_STREAM, "frame free");
544 if (gspca_dev->frbuf != NULL) {
545 vfree(gspca_dev->frbuf);
546 gspca_dev->frbuf = NULL;
547 for (i = 0; i < gspca_dev->nframes; i++)
548 gspca_dev->frame[i].data = NULL;
549 }
550 gspca_dev->nframes = 0;
551 gspca_dev->frsz = 0;
552 gspca_dev->capt_file = NULL;
553 gspca_dev->memory = GSPCA_MEMORY_NO;
554}
555
556static void destroy_urbs(struct gspca_dev *gspca_dev)
557{
558 struct urb *urb;
559 unsigned int i;
560
561 PDEBUG(D_STREAM, "kill transfer");
562 for (i = 0; i < MAX_NURBS; i++) {
563 urb = gspca_dev->urb[i];
564 if (urb == NULL)
565 break;
566
567 gspca_dev->urb[i] = NULL;
568 usb_kill_urb(urb);
569 usb_free_coherent(gspca_dev->dev,
570 urb->transfer_buffer_length,
571 urb->transfer_buffer,
572 urb->transfer_dma);
573 usb_free_urb(urb);
574 }
575}
576
577static int gspca_set_alt0(struct gspca_dev *gspca_dev)
578{
579 int ret;
580
581 if (gspca_dev->alt == 0)
582 return 0;
583 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
584 if (ret < 0)
585 pr_err("set alt 0 err %d\n", ret);
586 return ret;
587}
588
589
590static void gspca_stream_off(struct gspca_dev *gspca_dev)
591{
592 gspca_dev->streaming = 0;
593 gspca_dev->usb_err = 0;
594 if (gspca_dev->sd_desc->stopN)
595 gspca_dev->sd_desc->stopN(gspca_dev);
596 destroy_urbs(gspca_dev);
597 gspca_input_destroy_urb(gspca_dev);
598 gspca_set_alt0(gspca_dev);
599 gspca_input_create_urb(gspca_dev);
600 if (gspca_dev->sd_desc->stop0)
601 gspca_dev->sd_desc->stop0(gspca_dev);
602 PDEBUG(D_STREAM, "stream off OK");
603}
604
605
606
607
608
609
610
611static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
612 int xfer, int xfer_ep)
613{
614 struct usb_host_endpoint *ep;
615 int i, attr;
616
617 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
618 ep = &alt->endpoint[i];
619 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
620 if (attr == xfer
621 && ep->desc.wMaxPacketSize != 0
622 && usb_endpoint_dir_in(&ep->desc)
623 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
624 return ep;
625 }
626 return NULL;
627}
628
629
630static u32 which_bandwidth(struct gspca_dev *gspca_dev)
631{
632 u32 bandwidth;
633
634
635 bandwidth = gspca_dev->pixfmt.sizeimage;
636
637
638 if (!gspca_dev->cam.needs_full_bandwidth &&
639 bandwidth < gspca_dev->pixfmt.width *
640 gspca_dev->pixfmt.height)
641 bandwidth = bandwidth * 3 / 8;
642
643
644 if (gspca_dev->sd_desc->get_streamparm) {
645 struct v4l2_streamparm parm;
646
647 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
648 bandwidth *= parm.parm.capture.timeperframe.denominator;
649 bandwidth /= parm.parm.capture.timeperframe.numerator;
650 } else {
651
652
653
654 if (gspca_dev->pixfmt.width >= 640
655 && gspca_dev->dev->speed == USB_SPEED_FULL)
656 bandwidth *= 15;
657 else
658 bandwidth *= 30;
659 }
660
661 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
662 return bandwidth;
663}
664
665
666#define MAX_ALT 16
667struct ep_tb_s {
668 u32 alt;
669 u32 bandwidth;
670};
671
672
673
674
675
676static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
677 struct usb_interface *intf,
678 struct ep_tb_s *ep_tb)
679{
680 struct usb_host_endpoint *ep;
681 int i, j, nbalt, psize, found;
682 u32 bandwidth, last_bw;
683
684 nbalt = intf->num_altsetting;
685 if (nbalt > MAX_ALT)
686 nbalt = MAX_ALT;
687
688
689 i = 0;
690 last_bw = 0;
691 for (;;) {
692 ep_tb->bandwidth = 2000 * 2000 * 120;
693 found = 0;
694 for (j = 0; j < nbalt; j++) {
695 ep = alt_xfer(&intf->altsetting[j],
696 USB_ENDPOINT_XFER_ISOC,
697 gspca_dev->xfer_ep);
698 if (ep == NULL)
699 continue;
700 if (ep->desc.bInterval == 0) {
701 pr_err("alt %d iso endp with 0 interval\n", j);
702 continue;
703 }
704 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
705 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
706 bandwidth = psize * 1000;
707 if (gspca_dev->dev->speed == USB_SPEED_HIGH
708 || gspca_dev->dev->speed == USB_SPEED_SUPER)
709 bandwidth *= 8;
710 bandwidth /= 1 << (ep->desc.bInterval - 1);
711 if (bandwidth <= last_bw)
712 continue;
713 if (bandwidth < ep_tb->bandwidth) {
714 ep_tb->bandwidth = bandwidth;
715 ep_tb->alt = j;
716 found = 1;
717 }
718 }
719 if (!found)
720 break;
721 PDEBUG(D_STREAM, "alt %d bandwidth %d",
722 ep_tb->alt, ep_tb->bandwidth);
723 last_bw = ep_tb->bandwidth;
724 i++;
725 ep_tb++;
726 }
727
728
729
730
731
732
733
734
735
736 if (gspca_dev->audio &&
737 gspca_dev->dev->speed == USB_SPEED_FULL &&
738 last_bw >= 1000000 &&
739 i > 1) {
740 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
741 i--;
742 ep_tb--;
743 }
744
745
746 bandwidth = which_bandwidth(gspca_dev);
747 ep_tb--;
748 while (i > 1) {
749 ep_tb--;
750 if (ep_tb->bandwidth < bandwidth)
751 break;
752 i--;
753 }
754 return i;
755}
756
757
758
759
760static int create_urbs(struct gspca_dev *gspca_dev,
761 struct usb_host_endpoint *ep)
762{
763 struct urb *urb;
764 int n, nurbs, i, psize, npkt, bsize;
765
766
767 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
768
769 if (!gspca_dev->cam.bulk) {
770
771
772 if (gspca_dev->pkt_size == 0)
773 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
774 else
775 psize = gspca_dev->pkt_size;
776 npkt = gspca_dev->cam.npkt;
777 if (npkt == 0)
778 npkt = 32;
779 bsize = psize * npkt;
780 PDEBUG(D_STREAM,
781 "isoc %d pkts size %d = bsize:%d",
782 npkt, psize, bsize);
783 nurbs = DEF_NURBS;
784 } else {
785 npkt = 0;
786 bsize = gspca_dev->cam.bulk_size;
787 if (bsize == 0)
788 bsize = psize;
789 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
790 if (gspca_dev->cam.bulk_nurbs != 0)
791 nurbs = gspca_dev->cam.bulk_nurbs;
792 else
793 nurbs = 1;
794 }
795
796 for (n = 0; n < nurbs; n++) {
797 urb = usb_alloc_urb(npkt, GFP_KERNEL);
798 if (!urb) {
799 pr_err("usb_alloc_urb failed\n");
800 return -ENOMEM;
801 }
802 gspca_dev->urb[n] = urb;
803 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
804 bsize,
805 GFP_KERNEL,
806 &urb->transfer_dma);
807
808 if (urb->transfer_buffer == NULL) {
809 pr_err("usb_alloc_coherent failed\n");
810 return -ENOMEM;
811 }
812 urb->dev = gspca_dev->dev;
813 urb->context = gspca_dev;
814 urb->transfer_buffer_length = bsize;
815 if (npkt != 0) {
816 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
817 ep->desc.bEndpointAddress);
818 urb->transfer_flags = URB_ISO_ASAP
819 | URB_NO_TRANSFER_DMA_MAP;
820 urb->interval = 1 << (ep->desc.bInterval - 1);
821 urb->complete = isoc_irq;
822 urb->number_of_packets = npkt;
823 for (i = 0; i < npkt; i++) {
824 urb->iso_frame_desc[i].length = psize;
825 urb->iso_frame_desc[i].offset = psize * i;
826 }
827 } else {
828 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
829 ep->desc.bEndpointAddress);
830 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
831 urb->complete = bulk_irq;
832 }
833 }
834 return 0;
835}
836
837
838
839
840static int gspca_init_transfer(struct gspca_dev *gspca_dev)
841{
842 struct usb_interface *intf;
843 struct usb_host_endpoint *ep;
844 struct urb *urb;
845 struct ep_tb_s ep_tb[MAX_ALT];
846 int n, ret, xfer, alt, alt_idx;
847
848
849 gspca_dev->image = NULL;
850 gspca_dev->image_len = 0;
851 gspca_dev->last_packet_type = DISCARD_PACKET;
852 gspca_dev->sequence = 0;
853
854 gspca_dev->usb_err = 0;
855
856
857 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
858 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
859 if (gspca_dev->sd_desc->isoc_init) {
860 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
861 if (ret < 0)
862 return ret;
863 }
864 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
865 : USB_ENDPOINT_XFER_ISOC;
866
867
868 if (gspca_dev->alt != 0) {
869 gspca_dev->alt--;
870 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
871 gspca_dev->xfer_ep);
872 if (ep == NULL) {
873 pr_err("bad altsetting %d\n", gspca_dev->alt);
874 return -EIO;
875 }
876 ep_tb[0].alt = gspca_dev->alt;
877 alt_idx = 1;
878 } else {
879
880
881
882 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
883 if (alt_idx <= 0) {
884 pr_err("no transfer endpoint found\n");
885 return -EIO;
886 }
887 }
888
889
890
891 gspca_input_destroy_urb(gspca_dev);
892
893 gspca_dev->alt = ep_tb[--alt_idx].alt;
894 alt = -1;
895 for (;;) {
896 if (alt != gspca_dev->alt) {
897 alt = gspca_dev->alt;
898 if (intf->num_altsetting > 1) {
899 ret = usb_set_interface(gspca_dev->dev,
900 gspca_dev->iface,
901 alt);
902 if (ret < 0) {
903 if (ret == -ENOSPC)
904 goto retry;
905 pr_err("set alt %d err %d\n", alt, ret);
906 goto out;
907 }
908 }
909 }
910 if (!gspca_dev->cam.no_urb_create) {
911 PDEBUG(D_STREAM, "init transfer alt %d", alt);
912 ret = create_urbs(gspca_dev,
913 alt_xfer(&intf->altsetting[alt], xfer,
914 gspca_dev->xfer_ep));
915 if (ret < 0) {
916 destroy_urbs(gspca_dev);
917 goto out;
918 }
919 }
920
921
922 if (gspca_dev->cam.bulk)
923 usb_clear_halt(gspca_dev->dev,
924 gspca_dev->urb[0]->pipe);
925
926
927 ret = gspca_dev->sd_desc->start(gspca_dev);
928 if (ret < 0) {
929 destroy_urbs(gspca_dev);
930 goto out;
931 }
932 gspca_dev->streaming = 1;
933 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
934
935
936 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
937 break;
938
939
940 for (n = 0; n < MAX_NURBS; n++) {
941 urb = gspca_dev->urb[n];
942 if (urb == NULL)
943 break;
944 ret = usb_submit_urb(urb, GFP_KERNEL);
945 if (ret < 0)
946 break;
947 }
948 if (ret >= 0)
949 break;
950
951
952
953 gspca_stream_off(gspca_dev);
954 if (ret != -ENOSPC) {
955 pr_err("usb_submit_urb alt %d err %d\n",
956 gspca_dev->alt, ret);
957 goto out;
958 }
959
960
961
962retry:
963 PERR("alt %d - bandwidth not wide enough, trying again", alt);
964 msleep(20);
965 if (gspca_dev->sd_desc->isoc_nego) {
966 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
967 if (ret < 0)
968 goto out;
969 } else {
970 if (alt_idx <= 0) {
971 pr_err("no transfer endpoint found\n");
972 ret = -EIO;
973 goto out;
974 }
975 gspca_dev->alt = ep_tb[--alt_idx].alt;
976 }
977 }
978out:
979 gspca_input_create_urb(gspca_dev);
980 return ret;
981}
982
983static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
984{
985 int i;
986
987 i = gspca_dev->cam.nmodes - 1;
988 gspca_dev->curr_mode = i;
989 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
990
991
992 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
993}
994
995static int wxh_to_mode(struct gspca_dev *gspca_dev,
996 int width, int height)
997{
998 int i;
999
1000 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
1001 if (width >= gspca_dev->cam.cam_mode[i].width
1002 && height >= gspca_dev->cam.cam_mode[i].height)
1003 break;
1004 }
1005 return i;
1006}
1007
1008
1009
1010
1011static int gspca_get_mode(struct gspca_dev *gspca_dev,
1012 int mode,
1013 int pixfmt)
1014{
1015 int modeU, modeD;
1016
1017 modeU = modeD = mode;
1018 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1019 if (--modeD >= 0) {
1020 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1021 == pixfmt)
1022 return modeD;
1023 }
1024 if (++modeU < gspca_dev->cam.nmodes) {
1025 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1026 == pixfmt)
1027 return modeU;
1028 }
1029 }
1030 return -EINVAL;
1031}
1032
1033#ifdef CONFIG_VIDEO_ADV_DEBUG
1034static int vidioc_g_chip_info(struct file *file, void *priv,
1035 struct v4l2_dbg_chip_info *chip)
1036{
1037 struct gspca_dev *gspca_dev = video_drvdata(file);
1038
1039 gspca_dev->usb_err = 0;
1040 if (gspca_dev->sd_desc->get_chip_info)
1041 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
1042 return chip->match.addr ? -EINVAL : 0;
1043}
1044
1045static int vidioc_g_register(struct file *file, void *priv,
1046 struct v4l2_dbg_register *reg)
1047{
1048 struct gspca_dev *gspca_dev = video_drvdata(file);
1049
1050 gspca_dev->usb_err = 0;
1051 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
1052}
1053
1054static int vidioc_s_register(struct file *file, void *priv,
1055 const struct v4l2_dbg_register *reg)
1056{
1057 struct gspca_dev *gspca_dev = video_drvdata(file);
1058
1059 gspca_dev->usb_err = 0;
1060 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
1061}
1062#endif
1063
1064static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1065 struct v4l2_fmtdesc *fmtdesc)
1066{
1067 struct gspca_dev *gspca_dev = video_drvdata(file);
1068 int i, j, index;
1069 __u32 fmt_tb[8];
1070
1071
1072 index = 0;
1073 j = 0;
1074 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1075 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1076 j = 0;
1077 for (;;) {
1078 if (fmt_tb[j] == fmt_tb[index])
1079 break;
1080 j++;
1081 }
1082 if (j == index) {
1083 if (fmtdesc->index == index)
1084 break;
1085 index++;
1086 if (index >= ARRAY_SIZE(fmt_tb))
1087 return -EINVAL;
1088 }
1089 }
1090 if (i < 0)
1091 return -EINVAL;
1092
1093 fmtdesc->pixelformat = fmt_tb[index];
1094 if (gspca_dev->cam.cam_mode[i].sizeimage <
1095 gspca_dev->cam.cam_mode[i].width *
1096 gspca_dev->cam.cam_mode[i].height)
1097 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1098 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1099 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1100 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1101 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1102 fmtdesc->description[4] = '\0';
1103 return 0;
1104}
1105
1106static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1107 struct v4l2_format *fmt)
1108{
1109 struct gspca_dev *gspca_dev = video_drvdata(file);
1110
1111 fmt->fmt.pix = gspca_dev->pixfmt;
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 if (gspca_dev->sd_desc->try_fmt) {
1144
1145 fmt->fmt.pix.width = w;
1146 fmt->fmt.pix.height = h;
1147 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1148 }
1149
1150
1151 fmt->fmt.pix.priv = 0;
1152 return mode;
1153}
1154
1155static int vidioc_try_fmt_vid_cap(struct file *file,
1156 void *priv,
1157 struct v4l2_format *fmt)
1158{
1159 struct gspca_dev *gspca_dev = video_drvdata(file);
1160 int ret;
1161
1162 ret = try_fmt_vid_cap(gspca_dev, fmt);
1163 if (ret < 0)
1164 return ret;
1165 return 0;
1166}
1167
1168static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1169 struct v4l2_format *fmt)
1170{
1171 struct gspca_dev *gspca_dev = video_drvdata(file);
1172 int ret;
1173
1174 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1175 return -ERESTARTSYS;
1176
1177 ret = try_fmt_vid_cap(gspca_dev, fmt);
1178 if (ret < 0)
1179 goto out;
1180
1181 if (gspca_dev->nframes != 0
1182 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1183 ret = -EINVAL;
1184 goto out;
1185 }
1186
1187 if (gspca_dev->streaming) {
1188 ret = -EBUSY;
1189 goto out;
1190 }
1191 gspca_dev->curr_mode = ret;
1192 if (gspca_dev->sd_desc->try_fmt)
1193
1194 gspca_dev->pixfmt = fmt->fmt.pix;
1195 else
1196 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
1197
1198 ret = 0;
1199out:
1200 mutex_unlock(&gspca_dev->queue_lock);
1201 return ret;
1202}
1203
1204static int vidioc_enum_framesizes(struct file *file, void *priv,
1205 struct v4l2_frmsizeenum *fsize)
1206{
1207 struct gspca_dev *gspca_dev = video_drvdata(file);
1208 int i;
1209 __u32 index = 0;
1210
1211 if (gspca_dev->sd_desc->enum_framesizes)
1212 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1213
1214 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1215 if (fsize->pixel_format !=
1216 gspca_dev->cam.cam_mode[i].pixelformat)
1217 continue;
1218
1219 if (fsize->index == index) {
1220 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1221 fsize->discrete.width =
1222 gspca_dev->cam.cam_mode[i].width;
1223 fsize->discrete.height =
1224 gspca_dev->cam.cam_mode[i].height;
1225 return 0;
1226 }
1227 index++;
1228 }
1229
1230 return -EINVAL;
1231}
1232
1233static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1234 struct v4l2_frmivalenum *fival)
1235{
1236 struct gspca_dev *gspca_dev = video_drvdata(filp);
1237 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1238 __u32 i;
1239
1240 if (gspca_dev->cam.mode_framerates == NULL ||
1241 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1242 return -EINVAL;
1243
1244 if (fival->pixel_format !=
1245 gspca_dev->cam.cam_mode[mode].pixelformat)
1246 return -EINVAL;
1247
1248 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1249 if (fival->index == i) {
1250 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1251 fival->discrete.numerator = 1;
1252 fival->discrete.denominator =
1253 gspca_dev->cam.mode_framerates[mode].rates[i];
1254 return 0;
1255 }
1256 }
1257
1258 return -EINVAL;
1259}
1260
1261static void gspca_release(struct v4l2_device *v4l2_device)
1262{
1263 struct gspca_dev *gspca_dev =
1264 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1265
1266 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1267 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1268 kfree(gspca_dev->usb_buf);
1269 kfree(gspca_dev);
1270}
1271
1272static int dev_open(struct file *file)
1273{
1274 struct gspca_dev *gspca_dev = video_drvdata(file);
1275 int ret;
1276
1277 PDEBUG(D_STREAM, "[%s] open", current->comm);
1278
1279
1280 if (!try_module_get(gspca_dev->module))
1281 return -ENODEV;
1282
1283 ret = v4l2_fh_open(file);
1284 if (ret)
1285 module_put(gspca_dev->module);
1286 return ret;
1287}
1288
1289static int dev_close(struct file *file)
1290{
1291 struct gspca_dev *gspca_dev = video_drvdata(file);
1292
1293 PDEBUG(D_STREAM, "[%s] close", current->comm);
1294
1295
1296 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1297 return -ERESTARTSYS;
1298
1299 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
1300 mutex_unlock(&gspca_dev->usb_lock);
1301 return -ERESTARTSYS;
1302 }
1303
1304
1305 if (gspca_dev->capt_file == file) {
1306 if (gspca_dev->streaming)
1307 gspca_stream_off(gspca_dev);
1308 frame_free(gspca_dev);
1309 }
1310 module_put(gspca_dev->module);
1311 mutex_unlock(&gspca_dev->queue_lock);
1312 mutex_unlock(&gspca_dev->usb_lock);
1313
1314 PDEBUG(D_STREAM, "close done");
1315
1316 return v4l2_fh_release(file);
1317}
1318
1319static int vidioc_querycap(struct file *file, void *priv,
1320 struct v4l2_capability *cap)
1321{
1322 struct gspca_dev *gspca_dev = video_drvdata(file);
1323
1324 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
1325 sizeof cap->driver);
1326 if (gspca_dev->dev->product != NULL) {
1327 strlcpy((char *) cap->card, gspca_dev->dev->product,
1328 sizeof cap->card);
1329 } else {
1330 snprintf((char *) cap->card, sizeof cap->card,
1331 "USB Camera (%04x:%04x)",
1332 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1333 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1334 }
1335 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1336 sizeof(cap->bus_info));
1337 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1338 | V4L2_CAP_STREAMING
1339 | V4L2_CAP_READWRITE;
1340 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1341 return 0;
1342}
1343
1344static int vidioc_enum_input(struct file *file, void *priv,
1345 struct v4l2_input *input)
1346{
1347 struct gspca_dev *gspca_dev = video_drvdata(file);
1348
1349 if (input->index != 0)
1350 return -EINVAL;
1351 input->type = V4L2_INPUT_TYPE_CAMERA;
1352 input->status = gspca_dev->cam.input_flags;
1353 strlcpy(input->name, gspca_dev->sd_desc->name,
1354 sizeof input->name);
1355 return 0;
1356}
1357
1358static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1359{
1360 *i = 0;
1361 return 0;
1362}
1363
1364static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1365{
1366 if (i > 0)
1367 return -EINVAL;
1368 return (0);
1369}
1370
1371static int vidioc_reqbufs(struct file *file, void *priv,
1372 struct v4l2_requestbuffers *rb)
1373{
1374 struct gspca_dev *gspca_dev = video_drvdata(file);
1375 int i, ret = 0, streaming;
1376
1377 i = rb->memory;
1378 switch (i) {
1379 case GSPCA_MEMORY_READ:
1380 case V4L2_MEMORY_MMAP:
1381 case V4L2_MEMORY_USERPTR:
1382 break;
1383 default:
1384 return -EINVAL;
1385 }
1386 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1387 return -ERESTARTSYS;
1388
1389 if (gspca_dev->memory != GSPCA_MEMORY_NO
1390 && gspca_dev->memory != GSPCA_MEMORY_READ
1391 && gspca_dev->memory != rb->memory) {
1392 ret = -EBUSY;
1393 goto out;
1394 }
1395
1396
1397 if (gspca_dev->capt_file != NULL
1398 && gspca_dev->capt_file != file) {
1399 ret = -EBUSY;
1400 goto out;
1401 }
1402
1403
1404 for (i = 0; i < gspca_dev->nframes; i++) {
1405 if (gspca_dev->frame[i].vma_use_count) {
1406 ret = -EBUSY;
1407 goto out;
1408 }
1409 }
1410
1411
1412 streaming = gspca_dev->streaming;
1413 if (streaming) {
1414 gspca_stream_off(gspca_dev);
1415
1416
1417
1418 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1419 streaming = 0;
1420 }
1421
1422
1423 if (gspca_dev->nframes != 0)
1424 frame_free(gspca_dev);
1425 if (rb->count == 0)
1426 goto out;
1427 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
1428 if (ret == 0) {
1429 rb->count = gspca_dev->nframes;
1430 if (streaming)
1431 ret = gspca_init_transfer(gspca_dev);
1432 }
1433out:
1434 mutex_unlock(&gspca_dev->queue_lock);
1435 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1436 return ret;
1437}
1438
1439static int vidioc_querybuf(struct file *file, void *priv,
1440 struct v4l2_buffer *v4l2_buf)
1441{
1442 struct gspca_dev *gspca_dev = video_drvdata(file);
1443 struct gspca_frame *frame;
1444
1445 if (v4l2_buf->index >= gspca_dev->nframes)
1446 return -EINVAL;
1447
1448 frame = &gspca_dev->frame[v4l2_buf->index];
1449 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1450 return 0;
1451}
1452
1453static int vidioc_streamon(struct file *file, void *priv,
1454 enum v4l2_buf_type buf_type)
1455{
1456 struct gspca_dev *gspca_dev = video_drvdata(file);
1457 int ret;
1458
1459 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1460 return -EINVAL;
1461 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1462 return -ERESTARTSYS;
1463
1464
1465 if (gspca_dev->capt_file != file) {
1466 ret = -EBUSY;
1467 goto out;
1468 }
1469
1470 if (gspca_dev->nframes == 0
1471 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
1472 ret = -EINVAL;
1473 goto out;
1474 }
1475 if (!gspca_dev->streaming) {
1476 ret = gspca_init_transfer(gspca_dev);
1477 if (ret < 0)
1478 goto out;
1479 }
1480 PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK",
1481 gspca_dev->pixfmt.pixelformat,
1482 gspca_dev->pixfmt.width, gspca_dev->pixfmt.height);
1483 ret = 0;
1484out:
1485 mutex_unlock(&gspca_dev->queue_lock);
1486 return ret;
1487}
1488
1489static int vidioc_streamoff(struct file *file, void *priv,
1490 enum v4l2_buf_type buf_type)
1491{
1492 struct gspca_dev *gspca_dev = video_drvdata(file);
1493 int i, ret;
1494
1495 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1496 return -EINVAL;
1497
1498 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1499 return -ERESTARTSYS;
1500
1501 if (!gspca_dev->streaming) {
1502 ret = 0;
1503 goto out;
1504 }
1505
1506
1507 if (gspca_dev->capt_file != file) {
1508 ret = -EBUSY;
1509 goto out;
1510 }
1511
1512
1513 gspca_stream_off(gspca_dev);
1514
1515 wake_up_interruptible(&gspca_dev->wq);
1516
1517
1518 for (i = 0; i < gspca_dev->nframes; i++)
1519 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1520 atomic_set(&gspca_dev->fr_q, 0);
1521 atomic_set(&gspca_dev->fr_i, 0);
1522 gspca_dev->fr_o = 0;
1523 ret = 0;
1524out:
1525 mutex_unlock(&gspca_dev->queue_lock);
1526 return ret;
1527}
1528
1529static int vidioc_g_jpegcomp(struct file *file, void *priv,
1530 struct v4l2_jpegcompression *jpegcomp)
1531{
1532 struct gspca_dev *gspca_dev = video_drvdata(file);
1533
1534 gspca_dev->usb_err = 0;
1535 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1536}
1537
1538static int vidioc_s_jpegcomp(struct file *file, void *priv,
1539 const struct v4l2_jpegcompression *jpegcomp)
1540{
1541 struct gspca_dev *gspca_dev = video_drvdata(file);
1542
1543 gspca_dev->usb_err = 0;
1544 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1545}
1546
1547static int vidioc_g_parm(struct file *filp, void *priv,
1548 struct v4l2_streamparm *parm)
1549{
1550 struct gspca_dev *gspca_dev = video_drvdata(filp);
1551
1552 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1553
1554 if (gspca_dev->sd_desc->get_streamparm) {
1555 gspca_dev->usb_err = 0;
1556 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1557 return gspca_dev->usb_err;
1558 }
1559 return 0;
1560}
1561
1562static int vidioc_s_parm(struct file *filp, void *priv,
1563 struct v4l2_streamparm *parm)
1564{
1565 struct gspca_dev *gspca_dev = video_drvdata(filp);
1566 int n;
1567
1568 n = parm->parm.capture.readbuffers;
1569 if (n == 0 || n >= GSPCA_MAX_FRAMES)
1570 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1571 else
1572 gspca_dev->nbufread = n;
1573
1574 if (gspca_dev->sd_desc->set_streamparm) {
1575 gspca_dev->usb_err = 0;
1576 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1577 return gspca_dev->usb_err;
1578 }
1579
1580 return 0;
1581}
1582
1583static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1584{
1585 struct gspca_dev *gspca_dev = video_drvdata(file);
1586 struct gspca_frame *frame;
1587 struct page *page;
1588 unsigned long addr, start, size;
1589 int i, ret;
1590
1591 start = vma->vm_start;
1592 size = vma->vm_end - vma->vm_start;
1593 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1594
1595 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1596 return -ERESTARTSYS;
1597 if (gspca_dev->capt_file != file) {
1598 ret = -EINVAL;
1599 goto out;
1600 }
1601
1602 frame = NULL;
1603 for (i = 0; i < gspca_dev->nframes; ++i) {
1604 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1605 PDEBUG(D_STREAM, "mmap bad memory type");
1606 break;
1607 }
1608 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1609 == vma->vm_pgoff) {
1610 frame = &gspca_dev->frame[i];
1611 break;
1612 }
1613 }
1614 if (frame == NULL) {
1615 PDEBUG(D_STREAM, "mmap no frame buffer found");
1616 ret = -EINVAL;
1617 goto out;
1618 }
1619 if (size != frame->v4l2_buf.length) {
1620 PDEBUG(D_STREAM, "mmap bad size");
1621 ret = -EINVAL;
1622 goto out;
1623 }
1624
1625
1626
1627
1628
1629 vma->vm_flags |= VM_IO;
1630
1631 addr = (unsigned long) frame->data;
1632 while (size > 0) {
1633 page = vmalloc_to_page((void *) addr);
1634 ret = vm_insert_page(vma, start, page);
1635 if (ret < 0)
1636 goto out;
1637 start += PAGE_SIZE;
1638 addr += PAGE_SIZE;
1639 size -= PAGE_SIZE;
1640 }
1641
1642 vma->vm_ops = &gspca_vm_ops;
1643 vma->vm_private_data = frame;
1644 gspca_vm_open(vma);
1645 ret = 0;
1646out:
1647 mutex_unlock(&gspca_dev->queue_lock);
1648 return ret;
1649}
1650
1651static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1652 enum v4l2_memory memory)
1653{
1654 if (!gspca_dev->present)
1655 return -ENODEV;
1656 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1657 !gspca_dev->streaming)
1658 return -EINVAL;
1659
1660
1661 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1662}
1663
1664static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1665 enum v4l2_memory memory)
1666{
1667 int ret;
1668
1669 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1670 return -ERESTARTSYS;
1671 ret = frame_ready_nolock(gspca_dev, file, memory);
1672 mutex_unlock(&gspca_dev->queue_lock);
1673 return ret;
1674}
1675
1676
1677
1678
1679
1680
1681static int vidioc_dqbuf(struct file *file, void *priv,
1682 struct v4l2_buffer *v4l2_buf)
1683{
1684 struct gspca_dev *gspca_dev = video_drvdata(file);
1685 struct gspca_frame *frame;
1686 int i, j, ret;
1687
1688 PDEBUG(D_FRAM, "dqbuf");
1689
1690 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1691 return -ERESTARTSYS;
1692
1693 for (;;) {
1694 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1695 if (ret < 0)
1696 goto out;
1697 if (ret > 0)
1698 break;
1699
1700 mutex_unlock(&gspca_dev->queue_lock);
1701
1702 if (file->f_flags & O_NONBLOCK)
1703 return -EAGAIN;
1704
1705
1706 ret = wait_event_interruptible_timeout(gspca_dev->wq,
1707 frame_ready(gspca_dev, file, v4l2_buf->memory),
1708 msecs_to_jiffies(3000));
1709 if (ret < 0)
1710 return ret;
1711 if (ret == 0)
1712 return -EIO;
1713
1714 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1715 return -ERESTARTSYS;
1716 }
1717
1718 i = gspca_dev->fr_o;
1719 j = gspca_dev->fr_queue[i];
1720 frame = &gspca_dev->frame[j];
1721
1722 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
1723
1724 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1725 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1726 PDEBUG(D_FRAM, "dqbuf %d", j);
1727 ret = 0;
1728
1729 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
1730 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
1731 frame->data,
1732 frame->v4l2_buf.bytesused)) {
1733 PERR("dqbuf cp to user failed");
1734 ret = -EFAULT;
1735 }
1736 }
1737out:
1738 mutex_unlock(&gspca_dev->queue_lock);
1739
1740 if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
1741 mutex_lock(&gspca_dev->usb_lock);
1742 gspca_dev->usb_err = 0;
1743 if (gspca_dev->present)
1744 gspca_dev->sd_desc->dq_callback(gspca_dev);
1745 mutex_unlock(&gspca_dev->usb_lock);
1746 }
1747
1748 return ret;
1749}
1750
1751
1752
1753
1754
1755
1756
1757static int vidioc_qbuf(struct file *file, void *priv,
1758 struct v4l2_buffer *v4l2_buf)
1759{
1760 struct gspca_dev *gspca_dev = video_drvdata(file);
1761 struct gspca_frame *frame;
1762 int i, index, ret;
1763
1764 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
1765
1766 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1767 return -ERESTARTSYS;
1768
1769 index = v4l2_buf->index;
1770 if ((unsigned) index >= gspca_dev->nframes) {
1771 PDEBUG(D_FRAM,
1772 "qbuf idx %d >= %d", index, gspca_dev->nframes);
1773 ret = -EINVAL;
1774 goto out;
1775 }
1776 if (v4l2_buf->memory != gspca_dev->memory) {
1777 PDEBUG(D_FRAM, "qbuf bad memory type");
1778 ret = -EINVAL;
1779 goto out;
1780 }
1781
1782 frame = &gspca_dev->frame[index];
1783 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1784 PDEBUG(D_FRAM, "qbuf bad state");
1785 ret = -EINVAL;
1786 goto out;
1787 }
1788
1789 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
1790
1791 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
1792 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1793 frame->v4l2_buf.length = v4l2_buf->length;
1794 }
1795
1796
1797 i = atomic_read(&gspca_dev->fr_q);
1798 gspca_dev->fr_queue[i] = index;
1799 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
1800
1801 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1802 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1803 ret = 0;
1804out:
1805 mutex_unlock(&gspca_dev->queue_lock);
1806 return ret;
1807}
1808
1809
1810
1811
1812static int read_alloc(struct gspca_dev *gspca_dev,
1813 struct file *file)
1814{
1815 struct v4l2_buffer v4l2_buf;
1816 int i, ret;
1817
1818 PDEBUG(D_STREAM, "read alloc");
1819
1820 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1821 return -ERESTARTSYS;
1822
1823 if (gspca_dev->nframes == 0) {
1824 struct v4l2_requestbuffers rb;
1825
1826 memset(&rb, 0, sizeof rb);
1827 rb.count = gspca_dev->nbufread;
1828 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1829 rb.memory = GSPCA_MEMORY_READ;
1830 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1831 if (ret != 0) {
1832 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
1833 goto out;
1834 }
1835 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1836 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1837 v4l2_buf.memory = GSPCA_MEMORY_READ;
1838 for (i = 0; i < gspca_dev->nbufread; i++) {
1839 v4l2_buf.index = i;
1840 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1841 if (ret != 0) {
1842 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
1843 goto out;
1844 }
1845 }
1846 }
1847
1848
1849 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1850 if (ret != 0)
1851 PDEBUG(D_STREAM, "read streamon err %d", ret);
1852out:
1853 mutex_unlock(&gspca_dev->usb_lock);
1854 return ret;
1855}
1856
1857static unsigned int dev_poll(struct file *file, poll_table *wait)
1858{
1859 struct gspca_dev *gspca_dev = video_drvdata(file);
1860 unsigned long req_events = poll_requested_events(wait);
1861 int ret = 0;
1862
1863 PDEBUG(D_FRAM, "poll");
1864
1865 if (req_events & POLLPRI)
1866 ret |= v4l2_ctrl_poll(file, wait);
1867
1868 if (req_events & (POLLIN | POLLRDNORM)) {
1869
1870 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
1871 if (read_alloc(gspca_dev, file) != 0) {
1872 ret |= POLLERR;
1873 goto out;
1874 }
1875 }
1876
1877 poll_wait(file, &gspca_dev->wq, wait);
1878
1879
1880 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
1881 ret |= POLLERR;
1882 goto out;
1883 }
1884 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
1885 ret |= POLLIN | POLLRDNORM;
1886 mutex_unlock(&gspca_dev->queue_lock);
1887 }
1888
1889out:
1890 if (!gspca_dev->present)
1891 ret |= POLLHUP;
1892
1893 return ret;
1894}
1895
1896static ssize_t dev_read(struct file *file, char __user *data,
1897 size_t count, loff_t *ppos)
1898{
1899 struct gspca_dev *gspca_dev = video_drvdata(file);
1900 struct gspca_frame *frame;
1901 struct v4l2_buffer v4l2_buf;
1902 struct timeval timestamp;
1903 int n, ret, ret2;
1904
1905 PDEBUG(D_FRAM, "read (%zd)", count);
1906 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
1907 ret = read_alloc(gspca_dev, file);
1908 if (ret != 0)
1909 return ret;
1910 }
1911
1912
1913 timestamp = ktime_to_timeval(ktime_get());
1914 timestamp.tv_sec--;
1915 n = 2;
1916 for (;;) {
1917 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1918 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1919 v4l2_buf.memory = GSPCA_MEMORY_READ;
1920 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
1921 if (ret != 0) {
1922 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
1923 return ret;
1924 }
1925
1926
1927
1928 frame = &gspca_dev->frame[v4l2_buf.index];
1929 if (--n < 0)
1930 break;
1931 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
1932 break;
1933 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1934 if (ret != 0) {
1935 PDEBUG(D_STREAM, "read qbuf err %d", ret);
1936 return ret;
1937 }
1938 }
1939
1940
1941 if (count > frame->v4l2_buf.bytesused)
1942 count = frame->v4l2_buf.bytesused;
1943 ret = copy_to_user(data, frame->data, count);
1944 if (ret != 0) {
1945 PERR("read cp to user lack %d / %zd", ret, count);
1946 ret = -EFAULT;
1947 goto out;
1948 }
1949 ret = count;
1950out:
1951
1952 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1953 if (ret2 != 0)
1954 return ret2;
1955 return ret;
1956}
1957
1958static struct v4l2_file_operations dev_fops = {
1959 .owner = THIS_MODULE,
1960 .open = dev_open,
1961 .release = dev_close,
1962 .read = dev_read,
1963 .mmap = dev_mmap,
1964 .unlocked_ioctl = video_ioctl2,
1965 .poll = dev_poll,
1966};
1967
1968static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1969 .vidioc_querycap = vidioc_querycap,
1970 .vidioc_dqbuf = vidioc_dqbuf,
1971 .vidioc_qbuf = vidioc_qbuf,
1972 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1973 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1974 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1975 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1976 .vidioc_streamon = vidioc_streamon,
1977 .vidioc_enum_input = vidioc_enum_input,
1978 .vidioc_g_input = vidioc_g_input,
1979 .vidioc_s_input = vidioc_s_input,
1980 .vidioc_reqbufs = vidioc_reqbufs,
1981 .vidioc_querybuf = vidioc_querybuf,
1982 .vidioc_streamoff = vidioc_streamoff,
1983 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1984 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1985 .vidioc_g_parm = vidioc_g_parm,
1986 .vidioc_s_parm = vidioc_s_parm,
1987 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1988 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1989#ifdef CONFIG_VIDEO_ADV_DEBUG
1990 .vidioc_g_chip_info = vidioc_g_chip_info,
1991 .vidioc_g_register = vidioc_g_register,
1992 .vidioc_s_register = vidioc_s_register,
1993#endif
1994 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1995 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1996};
1997
1998static const struct video_device gspca_template = {
1999 .name = "gspca main driver",
2000 .fops = &dev_fops,
2001 .ioctl_ops = &dev_ioctl_ops,
2002 .release = video_device_release_empty,
2003};
2004
2005
2006
2007
2008
2009
2010
2011int gspca_dev_probe2(struct usb_interface *intf,
2012 const struct usb_device_id *id,
2013 const struct sd_desc *sd_desc,
2014 int dev_size,
2015 struct module *module)
2016{
2017 struct gspca_dev *gspca_dev;
2018 struct usb_device *dev = interface_to_usbdev(intf);
2019 int ret;
2020
2021 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2022 sd_desc->name, id->idVendor, id->idProduct);
2023
2024
2025 if (dev_size < sizeof *gspca_dev)
2026 dev_size = sizeof *gspca_dev;
2027 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
2028 if (!gspca_dev) {
2029 pr_err("couldn't kzalloc gspca struct\n");
2030 return -ENOMEM;
2031 }
2032 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2033 if (!gspca_dev->usb_buf) {
2034 pr_err("out of memory\n");
2035 ret = -ENOMEM;
2036 goto out;
2037 }
2038 gspca_dev->dev = dev;
2039 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
2040 gspca_dev->xfer_ep = -1;
2041
2042
2043 if (dev->actconfig->desc.bNumInterfaces != 1) {
2044 int i;
2045 struct usb_interface *intf2;
2046
2047 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2048 intf2 = dev->actconfig->interface[i];
2049 if (intf2 != NULL
2050 && intf2->altsetting != NULL
2051 && intf2->altsetting->desc.bInterfaceClass ==
2052 USB_CLASS_AUDIO) {
2053 gspca_dev->audio = 1;
2054 break;
2055 }
2056 }
2057 }
2058
2059 gspca_dev->v4l2_dev.release = gspca_release;
2060 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2061 if (ret)
2062 goto out;
2063 gspca_dev->sd_desc = sd_desc;
2064 gspca_dev->nbufread = 2;
2065 gspca_dev->empty_packet = -1;
2066 gspca_dev->vdev = gspca_template;
2067 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
2068 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
2069 gspca_dev->module = module;
2070 gspca_dev->present = 1;
2071
2072 mutex_init(&gspca_dev->usb_lock);
2073 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
2074 mutex_init(&gspca_dev->queue_lock);
2075 init_waitqueue_head(&gspca_dev->wq);
2076
2077
2078 ret = sd_desc->config(gspca_dev, id);
2079 if (ret < 0)
2080 goto out;
2081 ret = sd_desc->init(gspca_dev);
2082 if (ret < 0)
2083 goto out;
2084 if (sd_desc->init_controls)
2085 ret = sd_desc->init_controls(gspca_dev);
2086 if (ret < 0)
2087 goto out;
2088 gspca_set_default_mode(gspca_dev);
2089
2090 ret = gspca_input_connect(gspca_dev);
2091 if (ret)
2092 goto out;
2093
2094
2095
2096
2097
2098
2099 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
2100 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
2101 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
2102#ifdef CONFIG_VIDEO_ADV_DEBUG
2103 if (!gspca_dev->sd_desc->get_register)
2104 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
2105 if (!gspca_dev->sd_desc->set_register)
2106 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
2107#endif
2108 if (!gspca_dev->sd_desc->get_jcomp)
2109 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
2110 if (!gspca_dev->sd_desc->set_jcomp)
2111 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
2112
2113
2114 ret = video_register_device(&gspca_dev->vdev,
2115 VFL_TYPE_GRABBER,
2116 -1);
2117 if (ret < 0) {
2118 pr_err("video_register_device err %d\n", ret);
2119 goto out;
2120 }
2121
2122 usb_set_intfdata(intf, gspca_dev);
2123 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
2124
2125 gspca_input_create_urb(gspca_dev);
2126
2127 return 0;
2128out:
2129#if IS_ENABLED(CONFIG_INPUT)
2130 if (gspca_dev->input_dev)
2131 input_unregister_device(gspca_dev->input_dev);
2132#endif
2133 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2134 kfree(gspca_dev->usb_buf);
2135 kfree(gspca_dev);
2136 return ret;
2137}
2138EXPORT_SYMBOL(gspca_dev_probe2);
2139
2140
2141int gspca_dev_probe(struct usb_interface *intf,
2142 const struct usb_device_id *id,
2143 const struct sd_desc *sd_desc,
2144 int dev_size,
2145 struct module *module)
2146{
2147 struct usb_device *dev = interface_to_usbdev(intf);
2148
2149
2150 if (dev->descriptor.bNumConfigurations != 1) {
2151 pr_err("%04x:%04x too many config\n",
2152 id->idVendor, id->idProduct);
2153 return -ENODEV;
2154 }
2155
2156
2157 if (dev->actconfig->desc.bNumInterfaces != 1
2158 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
2159 return -ENODEV;
2160
2161 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2162}
2163EXPORT_SYMBOL(gspca_dev_probe);
2164
2165
2166
2167
2168
2169
2170
2171void gspca_disconnect(struct usb_interface *intf)
2172{
2173 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2174#if IS_ENABLED(CONFIG_INPUT)
2175 struct input_dev *input_dev;
2176#endif
2177
2178 PDEBUG(D_PROBE, "%s disconnect",
2179 video_device_node_name(&gspca_dev->vdev));
2180
2181 mutex_lock(&gspca_dev->usb_lock);
2182
2183 gspca_dev->present = 0;
2184 destroy_urbs(gspca_dev);
2185
2186#if IS_ENABLED(CONFIG_INPUT)
2187 gspca_input_destroy_urb(gspca_dev);
2188 input_dev = gspca_dev->input_dev;
2189 if (input_dev) {
2190 gspca_dev->input_dev = NULL;
2191 input_unregister_device(input_dev);
2192 }
2193#endif
2194
2195 if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
2196 gspca_dev->sd_desc->stop0(gspca_dev);
2197 gspca_dev->streaming = 0;
2198 gspca_dev->dev = NULL;
2199 wake_up_interruptible(&gspca_dev->wq);
2200
2201 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
2202 video_unregister_device(&gspca_dev->vdev);
2203
2204 mutex_unlock(&gspca_dev->usb_lock);
2205
2206
2207 v4l2_device_put(&gspca_dev->v4l2_dev);
2208}
2209EXPORT_SYMBOL(gspca_disconnect);
2210
2211#ifdef CONFIG_PM
2212int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2213{
2214 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2215
2216 gspca_input_destroy_urb(gspca_dev);
2217
2218 if (!gspca_dev->streaming)
2219 return 0;
2220
2221 mutex_lock(&gspca_dev->usb_lock);
2222 gspca_dev->frozen = 1;
2223 gspca_dev->usb_err = 0;
2224 if (gspca_dev->sd_desc->stopN)
2225 gspca_dev->sd_desc->stopN(gspca_dev);
2226 destroy_urbs(gspca_dev);
2227 gspca_set_alt0(gspca_dev);
2228 if (gspca_dev->sd_desc->stop0)
2229 gspca_dev->sd_desc->stop0(gspca_dev);
2230 mutex_unlock(&gspca_dev->usb_lock);
2231
2232 return 0;
2233}
2234EXPORT_SYMBOL(gspca_suspend);
2235
2236int gspca_resume(struct usb_interface *intf)
2237{
2238 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2239 int streaming, ret = 0;
2240
2241 mutex_lock(&gspca_dev->usb_lock);
2242 gspca_dev->frozen = 0;
2243 gspca_dev->usb_err = 0;
2244 gspca_dev->sd_desc->init(gspca_dev);
2245
2246
2247
2248
2249
2250 streaming = gspca_dev->streaming;
2251 gspca_dev->streaming = 0;
2252 if (streaming)
2253 ret = gspca_init_transfer(gspca_dev);
2254 else
2255 gspca_input_create_urb(gspca_dev);
2256 mutex_unlock(&gspca_dev->usb_lock);
2257
2258 return ret;
2259}
2260EXPORT_SYMBOL(gspca_resume);
2261#endif
2262
2263
2264static int __init gspca_init(void)
2265{
2266 pr_info("v" GSPCA_VERSION " registered\n");
2267 return 0;
2268}
2269static void __exit gspca_exit(void)
2270{
2271}
2272
2273module_init(gspca_init);
2274module_exit(gspca_exit);
2275
2276module_param_named(debug, gspca_debug, int, 0644);
2277MODULE_PARM_DESC(debug,
2278 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
2279
