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10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#define GSPCA_VERSION "2.14.0"
14
15#include <linux/init.h>
16#include <linux/fs.h>
17#include <linux/vmalloc.h>
18#include <linux/sched.h>
19#include <linux/slab.h>
20#include <linux/mm.h>
21#include <linux/string.h>
22#include <linux/pagemap.h>
23#include <linux/io.h>
24#include <asm/page.h>
25#include <linux/uaccess.h>
26#include <linux/ktime.h>
27#include <media/v4l2-ioctl.h>
28#include <media/v4l2-ctrls.h>
29#include <media/v4l2-fh.h>
30#include <media/v4l2-event.h>
31
32#include "gspca.h"
33
34#if IS_ENABLED(CONFIG_INPUT)
35#include <linux/input.h>
36#include <linux/usb/input.h>
37#endif
38
39
40#define DEF_NURBS 3
41#if DEF_NURBS > MAX_NURBS
42#error "DEF_NURBS too big"
43#endif
44
45MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
46MODULE_DESCRIPTION("GSPCA USB Camera Driver");
47MODULE_LICENSE("GPL");
48MODULE_VERSION(GSPCA_VERSION);
49
50int gspca_debug;
51EXPORT_SYMBOL(gspca_debug);
52
53static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
54 __u32 pixfmt, int w, int h)
55{
56 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
57 gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n",
58 txt,
59 pixfmt & 0xff,
60 (pixfmt >> 8) & 0xff,
61 (pixfmt >> 16) & 0xff,
62 pixfmt >> 24,
63 w, h);
64 } else {
65 gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n",
66 txt,
67 pixfmt,
68 w, h);
69 }
70}
71
72
73#define GSPCA_MEMORY_NO 0
74#define GSPCA_MEMORY_READ 7
75
76
77
78
79#if IS_ENABLED(CONFIG_INPUT)
80static void int_irq(struct urb *urb)
81{
82 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
83 int ret;
84
85 ret = urb->status;
86 switch (ret) {
87 case 0:
88 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
89 urb->transfer_buffer, urb->actual_length) < 0) {
90 gspca_err(gspca_dev, "Unknown packet received\n");
91 }
92 break;
93
94 case -ENOENT:
95 case -ECONNRESET:
96 case -ENODEV:
97 case -ESHUTDOWN:
98
99
100
101 break;
102
103 default:
104 gspca_err(gspca_dev, "URB error %i, resubmitting\n",
105 urb->status);
106 urb->status = 0;
107 ret = 0;
108 }
109
110 if (ret == 0) {
111 ret = usb_submit_urb(urb, GFP_ATOMIC);
112 if (ret < 0)
113 pr_err("Resubmit URB failed with error %i\n", ret);
114 }
115}
116
117static int gspca_input_connect(struct gspca_dev *dev)
118{
119 struct input_dev *input_dev;
120 int err = 0;
121
122 dev->input_dev = NULL;
123 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
124 input_dev = input_allocate_device();
125 if (!input_dev)
126 return -ENOMEM;
127
128 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
129 strlcat(dev->phys, "/input0", sizeof(dev->phys));
130
131 input_dev->name = dev->sd_desc->name;
132 input_dev->phys = dev->phys;
133
134 usb_to_input_id(dev->dev, &input_dev->id);
135
136 input_dev->evbit[0] = BIT_MASK(EV_KEY);
137 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
138 input_dev->dev.parent = &dev->dev->dev;
139
140 err = input_register_device(input_dev);
141 if (err) {
142 pr_err("Input device registration failed with error %i\n",
143 err);
144 input_dev->dev.parent = NULL;
145 input_free_device(input_dev);
146 } else {
147 dev->input_dev = input_dev;
148 }
149 }
150
151 return err;
152}
153
154static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
155 struct usb_endpoint_descriptor *ep)
156{
157 unsigned int buffer_len;
158 int interval;
159 struct urb *urb;
160 struct usb_device *dev;
161 void *buffer = NULL;
162 int ret = -EINVAL;
163
164 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
165 interval = ep->bInterval;
166 gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n",
167 ep->bEndpointAddress, buffer_len, interval);
168
169 dev = gspca_dev->dev;
170
171 urb = usb_alloc_urb(0, GFP_KERNEL);
172 if (!urb) {
173 ret = -ENOMEM;
174 goto error;
175 }
176
177 buffer = usb_alloc_coherent(dev, buffer_len,
178 GFP_KERNEL, &urb->transfer_dma);
179 if (!buffer) {
180 ret = -ENOMEM;
181 goto error_buffer;
182 }
183 usb_fill_int_urb(urb, dev,
184 usb_rcvintpipe(dev, ep->bEndpointAddress),
185 buffer, buffer_len,
186 int_irq, (void *)gspca_dev, interval);
187 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
188 ret = usb_submit_urb(urb, GFP_KERNEL);
189 if (ret < 0) {
190 gspca_err(gspca_dev, "submit int URB failed with error %i\n",
191 ret);
192 goto error_submit;
193 }
194 gspca_dev->int_urb = urb;
195 return ret;
196
197error_submit:
198 usb_free_coherent(dev,
199 urb->transfer_buffer_length,
200 urb->transfer_buffer,
201 urb->transfer_dma);
202error_buffer:
203 usb_free_urb(urb);
204error:
205 return ret;
206}
207
208static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
209{
210 struct usb_interface *intf;
211 struct usb_host_interface *intf_desc;
212 struct usb_endpoint_descriptor *ep;
213 int i;
214
215 if (gspca_dev->sd_desc->int_pkt_scan) {
216 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
217 intf_desc = intf->cur_altsetting;
218 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
219 ep = &intf_desc->endpoint[i].desc;
220 if (usb_endpoint_dir_in(ep) &&
221 usb_endpoint_xfer_int(ep)) {
222
223 alloc_and_submit_int_urb(gspca_dev, ep);
224 break;
225 }
226 }
227 }
228}
229
230static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
231{
232 struct urb *urb;
233
234 urb = gspca_dev->int_urb;
235 if (urb) {
236 gspca_dev->int_urb = NULL;
237 usb_kill_urb(urb);
238 usb_free_coherent(gspca_dev->dev,
239 urb->transfer_buffer_length,
240 urb->transfer_buffer,
241 urb->transfer_dma);
242 usb_free_urb(urb);
243 }
244}
245#else
246static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
247{
248}
249
250static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
251{
252}
253
254static inline int gspca_input_connect(struct gspca_dev *dev)
255{
256 return 0;
257}
258#endif
259
260
261
262
263static void fill_frame(struct gspca_dev *gspca_dev,
264 struct urb *urb)
265{
266 u8 *data;
267 int i, len, st;
268 cam_pkt_op pkt_scan;
269
270 if (urb->status != 0) {
271 if (urb->status == -ESHUTDOWN)
272 return;
273#ifdef CONFIG_PM
274 if (gspca_dev->frozen)
275 return;
276#endif
277 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
278 urb->status = 0;
279 goto resubmit;
280 }
281 pkt_scan = gspca_dev->sd_desc->pkt_scan;
282 for (i = 0; i < urb->number_of_packets; i++) {
283 len = urb->iso_frame_desc[i].actual_length;
284
285
286 st = urb->iso_frame_desc[i].status;
287 if (st) {
288 gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n",
289 i, len, st);
290 gspca_dev->last_packet_type = DISCARD_PACKET;
291 continue;
292 }
293 if (len == 0) {
294 if (gspca_dev->empty_packet == 0)
295 gspca_dev->empty_packet = 1;
296 continue;
297 }
298
299
300 gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n",
301 i, urb->iso_frame_desc[i].offset, len);
302 data = (u8 *) urb->transfer_buffer
303 + urb->iso_frame_desc[i].offset;
304 pkt_scan(gspca_dev, data, len);
305 }
306
307resubmit:
308 if (!gspca_dev->streaming)
309 return;
310
311 st = usb_submit_urb(urb, GFP_ATOMIC);
312 if (st < 0)
313 pr_err("usb_submit_urb() ret %d\n", st);
314}
315
316
317
318
319
320
321static void isoc_irq(struct urb *urb)
322{
323 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
324
325 gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
326 if (!gspca_dev->streaming)
327 return;
328 fill_frame(gspca_dev, urb);
329}
330
331
332
333
334static void bulk_irq(struct urb *urb)
335{
336 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
337 int st;
338
339 gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
340 if (!gspca_dev->streaming)
341 return;
342 switch (urb->status) {
343 case 0:
344 break;
345 case -ESHUTDOWN:
346 return;
347 default:
348#ifdef CONFIG_PM
349 if (gspca_dev->frozen)
350 return;
351#endif
352 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
353 urb->status = 0;
354 goto resubmit;
355 }
356
357 gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length);
358 gspca_dev->sd_desc->pkt_scan(gspca_dev,
359 urb->transfer_buffer,
360 urb->actual_length);
361
362resubmit:
363 if (!gspca_dev->streaming)
364 return;
365
366 if (gspca_dev->cam.bulk_nurbs != 0) {
367 st = usb_submit_urb(urb, GFP_ATOMIC);
368 if (st < 0)
369 pr_err("usb_submit_urb() ret %d\n", st);
370 }
371}
372
373
374
375
376
377
378
379
380
381
382
383
384void gspca_frame_add(struct gspca_dev *gspca_dev,
385 enum gspca_packet_type packet_type,
386 const u8 *data,
387 int len)
388{
389 struct gspca_buffer *buf;
390 unsigned long flags;
391
392 gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len);
393
394 spin_lock_irqsave(&gspca_dev->qlock, flags);
395 buf = list_first_entry_or_null(&gspca_dev->buf_list,
396 typeof(*buf), list);
397 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
398
399 if (packet_type == FIRST_PACKET) {
400
401 if (!buf) {
402 gspca_dev->last_packet_type = DISCARD_PACKET;
403 gspca_dev->sequence++;
404 return;
405 }
406 gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
407 gspca_dev->image_len = 0;
408 } else {
409 switch (gspca_dev->last_packet_type) {
410 case DISCARD_PACKET:
411 if (packet_type == LAST_PACKET) {
412 gspca_dev->last_packet_type = packet_type;
413 gspca_dev->image = NULL;
414 gspca_dev->image_len = 0;
415 }
416 return;
417 case LAST_PACKET:
418 return;
419 }
420 }
421
422
423 if (len > 0) {
424 if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) {
425 gspca_err(gspca_dev, "frame overflow %d > %d\n",
426 gspca_dev->image_len + len,
427 PAGE_ALIGN(gspca_dev->pixfmt.sizeimage));
428 packet_type = DISCARD_PACKET;
429 } else {
430
431
432
433
434
435
436 memcpy(gspca_dev->image + gspca_dev->image_len,
437 data, len);
438 gspca_dev->image_len += len;
439 }
440 }
441 gspca_dev->last_packet_type = packet_type;
442
443
444
445
446 if (packet_type == LAST_PACKET) {
447 spin_lock_irqsave(&gspca_dev->qlock, flags);
448 list_del(&buf->list);
449 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
450 buf->vb.vb2_buf.timestamp = ktime_get_ns();
451 vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
452 gspca_dev->image_len);
453 buf->vb.sequence = gspca_dev->sequence++;
454 buf->vb.field = V4L2_FIELD_NONE;
455 gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n",
456 gspca_dev->image_len);
457 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
458 gspca_dev->image = NULL;
459 gspca_dev->image_len = 0;
460 }
461}
462EXPORT_SYMBOL(gspca_frame_add);
463
464static void destroy_urbs(struct gspca_dev *gspca_dev)
465{
466 struct urb *urb;
467 unsigned int i;
468
469 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
470
471
472
473
474
475 for (i = 0; i < MAX_NURBS; i++)
476 usb_kill_urb(gspca_dev->urb[i]);
477
478 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
479 for (i = 0; i < MAX_NURBS; i++) {
480 urb = gspca_dev->urb[i];
481 if (!urb)
482 continue;
483 gspca_dev->urb[i] = NULL;
484 usb_free_coherent(gspca_dev->dev,
485 urb->transfer_buffer_length,
486 urb->transfer_buffer,
487 urb->transfer_dma);
488 usb_free_urb(urb);
489 }
490}
491
492static int gspca_set_alt0(struct gspca_dev *gspca_dev)
493{
494 int ret;
495
496 if (gspca_dev->alt == 0)
497 return 0;
498 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
499 if (ret < 0)
500 pr_err("set alt 0 err %d\n", ret);
501 return ret;
502}
503
504
505
506
507
508
509
510static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
511 int xfer, int xfer_ep)
512{
513 struct usb_host_endpoint *ep;
514 int i, attr;
515
516 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
517 ep = &alt->endpoint[i];
518 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
519 if (attr == xfer
520 && ep->desc.wMaxPacketSize != 0
521 && usb_endpoint_dir_in(&ep->desc)
522 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
523 return ep;
524 }
525 return NULL;
526}
527
528
529static u32 which_bandwidth(struct gspca_dev *gspca_dev)
530{
531 u32 bandwidth;
532
533
534 bandwidth = gspca_dev->pixfmt.sizeimage;
535
536
537 if (!gspca_dev->cam.needs_full_bandwidth &&
538 bandwidth < gspca_dev->pixfmt.width *
539 gspca_dev->pixfmt.height)
540 bandwidth = bandwidth * 3 / 8;
541
542
543 if (gspca_dev->sd_desc->get_streamparm) {
544 struct v4l2_streamparm parm;
545
546 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
547 bandwidth *= parm.parm.capture.timeperframe.denominator;
548 bandwidth /= parm.parm.capture.timeperframe.numerator;
549 } else {
550
551
552
553 if (gspca_dev->pixfmt.width >= 640
554 && gspca_dev->dev->speed == USB_SPEED_FULL)
555 bandwidth *= 15;
556 else
557 bandwidth *= 30;
558 }
559
560 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
561 return bandwidth;
562}
563
564
565#define MAX_ALT 16
566struct ep_tb_s {
567 u32 alt;
568 u32 bandwidth;
569};
570
571
572
573
574
575static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
576 struct usb_interface *intf,
577 struct ep_tb_s *ep_tb)
578{
579 struct usb_host_endpoint *ep;
580 int i, j, nbalt, psize, found;
581 u32 bandwidth, last_bw;
582
583 nbalt = intf->num_altsetting;
584 if (nbalt > MAX_ALT)
585 nbalt = MAX_ALT;
586
587
588 i = 0;
589 last_bw = 0;
590 for (;;) {
591 ep_tb->bandwidth = 2000 * 2000 * 120;
592 found = 0;
593 for (j = 0; j < nbalt; j++) {
594 ep = alt_xfer(&intf->altsetting[j],
595 USB_ENDPOINT_XFER_ISOC,
596 gspca_dev->xfer_ep);
597 if (ep == NULL)
598 continue;
599 if (ep->desc.bInterval == 0) {
600 pr_err("alt %d iso endp with 0 interval\n", j);
601 continue;
602 }
603 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
604 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
605 bandwidth = psize * 1000;
606 if (gspca_dev->dev->speed == USB_SPEED_HIGH
607 || gspca_dev->dev->speed >= USB_SPEED_SUPER)
608 bandwidth *= 8;
609 bandwidth /= 1 << (ep->desc.bInterval - 1);
610 if (bandwidth <= last_bw)
611 continue;
612 if (bandwidth < ep_tb->bandwidth) {
613 ep_tb->bandwidth = bandwidth;
614 ep_tb->alt = j;
615 found = 1;
616 }
617 }
618 if (!found)
619 break;
620 gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n",
621 ep_tb->alt, ep_tb->bandwidth);
622 last_bw = ep_tb->bandwidth;
623 i++;
624 ep_tb++;
625 }
626
627
628
629
630
631
632
633
634
635 if (gspca_dev->audio &&
636 gspca_dev->dev->speed == USB_SPEED_FULL &&
637 last_bw >= 1000000 &&
638 i > 1) {
639 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
640 i--;
641 ep_tb--;
642 }
643
644
645 bandwidth = which_bandwidth(gspca_dev);
646 ep_tb--;
647 while (i > 1) {
648 ep_tb--;
649 if (ep_tb->bandwidth < bandwidth)
650 break;
651 i--;
652 }
653 return i;
654}
655
656
657
658
659static int create_urbs(struct gspca_dev *gspca_dev,
660 struct usb_host_endpoint *ep)
661{
662 struct urb *urb;
663 int n, nurbs, i, psize, npkt, bsize;
664
665
666 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
667
668 if (!gspca_dev->cam.bulk) {
669
670
671 if (gspca_dev->pkt_size == 0)
672 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
673 else
674 psize = gspca_dev->pkt_size;
675 npkt = gspca_dev->cam.npkt;
676 if (npkt == 0)
677 npkt = 32;
678 bsize = psize * npkt;
679 gspca_dbg(gspca_dev, D_STREAM,
680 "isoc %d pkts size %d = bsize:%d\n",
681 npkt, psize, bsize);
682 nurbs = DEF_NURBS;
683 } else {
684 npkt = 0;
685 bsize = gspca_dev->cam.bulk_size;
686 if (bsize == 0)
687 bsize = psize;
688 gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize);
689 if (gspca_dev->cam.bulk_nurbs != 0)
690 nurbs = gspca_dev->cam.bulk_nurbs;
691 else
692 nurbs = 1;
693 }
694
695 for (n = 0; n < nurbs; n++) {
696 urb = usb_alloc_urb(npkt, GFP_KERNEL);
697 if (!urb)
698 return -ENOMEM;
699 gspca_dev->urb[n] = urb;
700 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
701 bsize,
702 GFP_KERNEL,
703 &urb->transfer_dma);
704
705 if (urb->transfer_buffer == NULL) {
706 pr_err("usb_alloc_coherent failed\n");
707 return -ENOMEM;
708 }
709 urb->dev = gspca_dev->dev;
710 urb->context = gspca_dev;
711 urb->transfer_buffer_length = bsize;
712 if (npkt != 0) {
713 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
714 ep->desc.bEndpointAddress);
715 urb->transfer_flags = URB_ISO_ASAP
716 | URB_NO_TRANSFER_DMA_MAP;
717 urb->interval = 1 << (ep->desc.bInterval - 1);
718 urb->complete = isoc_irq;
719 urb->number_of_packets = npkt;
720 for (i = 0; i < npkt; i++) {
721 urb->iso_frame_desc[i].length = psize;
722 urb->iso_frame_desc[i].offset = psize * i;
723 }
724 } else {
725 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
726 ep->desc.bEndpointAddress);
727 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
728 urb->complete = bulk_irq;
729 }
730 }
731 return 0;
732}
733
734
735static void gspca_stream_off(struct gspca_dev *gspca_dev)
736{
737 gspca_dev->streaming = false;
738 gspca_dev->usb_err = 0;
739 if (gspca_dev->sd_desc->stopN)
740 gspca_dev->sd_desc->stopN(gspca_dev);
741 destroy_urbs(gspca_dev);
742 gspca_input_destroy_urb(gspca_dev);
743 gspca_set_alt0(gspca_dev);
744 if (gspca_dev->present)
745 gspca_input_create_urb(gspca_dev);
746 if (gspca_dev->sd_desc->stop0)
747 gspca_dev->sd_desc->stop0(gspca_dev);
748 gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n");
749}
750
751
752
753
754static int gspca_init_transfer(struct gspca_dev *gspca_dev)
755{
756 struct usb_interface *intf;
757 struct usb_host_endpoint *ep;
758 struct urb *urb;
759 struct ep_tb_s ep_tb[MAX_ALT];
760 int n, ret, xfer, alt, alt_idx;
761
762
763 gspca_dev->image = NULL;
764 gspca_dev->image_len = 0;
765 gspca_dev->last_packet_type = DISCARD_PACKET;
766
767 gspca_dev->usb_err = 0;
768
769
770 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
771 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
772 if (gspca_dev->sd_desc->isoc_init) {
773 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
774 if (ret < 0)
775 return ret;
776 }
777 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
778 : USB_ENDPOINT_XFER_ISOC;
779
780
781 if (gspca_dev->alt != 0) {
782 gspca_dev->alt--;
783 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
784 gspca_dev->xfer_ep);
785 if (ep == NULL) {
786 pr_err("bad altsetting %d\n", gspca_dev->alt);
787 return -EIO;
788 }
789 ep_tb[0].alt = gspca_dev->alt;
790 alt_idx = 1;
791 } else {
792
793
794 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
795 if (alt_idx <= 0) {
796 pr_err("no transfer endpoint found\n");
797 return -EIO;
798 }
799 }
800
801
802
803 gspca_input_destroy_urb(gspca_dev);
804
805 gspca_dev->alt = ep_tb[--alt_idx].alt;
806 alt = -1;
807 for (;;) {
808 if (alt != gspca_dev->alt) {
809 alt = gspca_dev->alt;
810 if (intf->num_altsetting > 1) {
811 ret = usb_set_interface(gspca_dev->dev,
812 gspca_dev->iface,
813 alt);
814 if (ret < 0) {
815 if (ret == -ENOSPC)
816 goto retry;
817 pr_err("set alt %d err %d\n", alt, ret);
818 goto out;
819 }
820 }
821 }
822 if (!gspca_dev->cam.no_urb_create) {
823 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
824 alt);
825 ret = create_urbs(gspca_dev,
826 alt_xfer(&intf->altsetting[alt], xfer,
827 gspca_dev->xfer_ep));
828 if (ret < 0) {
829 destroy_urbs(gspca_dev);
830 goto out;
831 }
832 }
833
834
835 if (gspca_dev->cam.bulk)
836 usb_clear_halt(gspca_dev->dev,
837 gspca_dev->urb[0]->pipe);
838
839
840 ret = gspca_dev->sd_desc->start(gspca_dev);
841 if (ret < 0) {
842 destroy_urbs(gspca_dev);
843 goto out;
844 }
845 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
846 gspca_dev->streaming = true;
847
848
849 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
850 break;
851
852
853 for (n = 0; n < MAX_NURBS; n++) {
854 urb = gspca_dev->urb[n];
855 if (urb == NULL)
856 break;
857 ret = usb_submit_urb(urb, GFP_KERNEL);
858 if (ret < 0)
859 break;
860 }
861 if (ret >= 0)
862 break;
863
864
865
866 gspca_stream_off(gspca_dev);
867 if (ret != -ENOSPC) {
868 pr_err("usb_submit_urb alt %d err %d\n",
869 gspca_dev->alt, ret);
870 goto out;
871 }
872
873
874
875retry:
876 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
877 alt);
878 msleep(20);
879 if (gspca_dev->sd_desc->isoc_nego) {
880 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
881 if (ret < 0)
882 goto out;
883 } else {
884 if (alt_idx <= 0) {
885 pr_err("no transfer endpoint found\n");
886 ret = -EIO;
887 goto out;
888 }
889 gspca_dev->alt = ep_tb[--alt_idx].alt;
890 }
891 }
892out:
893 gspca_input_create_urb(gspca_dev);
894 return ret;
895}
896
897static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
898{
899 int i;
900
901 i = gspca_dev->cam.nmodes - 1;
902 gspca_dev->curr_mode = i;
903 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
904
905
906 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
907}
908
909static int wxh_to_mode(struct gspca_dev *gspca_dev,
910 int width, int height, u32 pixelformat)
911{
912 int i;
913
914 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
915 if (width == gspca_dev->cam.cam_mode[i].width
916 && height == gspca_dev->cam.cam_mode[i].height
917 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
918 return i;
919 }
920 return -EINVAL;
921}
922
923static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
924 int width, int height, u32 pixelformat)
925{
926 int i;
927
928 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
929 if (width >= gspca_dev->cam.cam_mode[i].width
930 && height >= gspca_dev->cam.cam_mode[i].height
931 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
932 return i;
933 }
934 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
935 if (width >= gspca_dev->cam.cam_mode[i].width
936 && height >= gspca_dev->cam.cam_mode[i].height)
937 break;
938 }
939 return i;
940}
941
942
943
944
945static int gspca_get_mode(struct gspca_dev *gspca_dev,
946 int mode,
947 int pixfmt)
948{
949 int modeU, modeD;
950
951 modeU = modeD = mode;
952 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
953 if (--modeD >= 0) {
954 if (gspca_dev->cam.cam_mode[modeD].pixelformat
955 == pixfmt)
956 return modeD;
957 }
958 if (++modeU < gspca_dev->cam.nmodes) {
959 if (gspca_dev->cam.cam_mode[modeU].pixelformat
960 == pixfmt)
961 return modeU;
962 }
963 }
964 return -EINVAL;
965}
966
967#ifdef CONFIG_VIDEO_ADV_DEBUG
968static int vidioc_g_chip_info(struct file *file, void *priv,
969 struct v4l2_dbg_chip_info *chip)
970{
971 struct gspca_dev *gspca_dev = video_drvdata(file);
972
973 gspca_dev->usb_err = 0;
974 if (gspca_dev->sd_desc->get_chip_info)
975 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
976 return chip->match.addr ? -EINVAL : 0;
977}
978
979static int vidioc_g_register(struct file *file, void *priv,
980 struct v4l2_dbg_register *reg)
981{
982 struct gspca_dev *gspca_dev = video_drvdata(file);
983
984 gspca_dev->usb_err = 0;
985 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
986}
987
988static int vidioc_s_register(struct file *file, void *priv,
989 const struct v4l2_dbg_register *reg)
990{
991 struct gspca_dev *gspca_dev = video_drvdata(file);
992
993 gspca_dev->usb_err = 0;
994 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
995}
996#endif
997
998static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
999 struct v4l2_fmtdesc *fmtdesc)
1000{
1001 struct gspca_dev *gspca_dev = video_drvdata(file);
1002 int i, j, index;
1003 __u32 fmt_tb[8];
1004
1005
1006 index = 0;
1007 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1008 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1009 j = 0;
1010 for (;;) {
1011 if (fmt_tb[j] == fmt_tb[index])
1012 break;
1013 j++;
1014 }
1015 if (j == index) {
1016 if (fmtdesc->index == index)
1017 break;
1018 index++;
1019 if (index >= ARRAY_SIZE(fmt_tb))
1020 return -EINVAL;
1021 }
1022 }
1023 if (i < 0)
1024 return -EINVAL;
1025
1026 fmtdesc->pixelformat = fmt_tb[index];
1027 if (gspca_dev->cam.cam_mode[i].sizeimage <
1028 gspca_dev->cam.cam_mode[i].width *
1029 gspca_dev->cam.cam_mode[i].height)
1030 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1031 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1032 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1033 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1034 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1035 fmtdesc->description[4] = '\0';
1036 return 0;
1037}
1038
1039static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1040 struct v4l2_format *fmt)
1041{
1042 struct gspca_dev *gspca_dev = video_drvdata(file);
1043
1044 fmt->fmt.pix = gspca_dev->pixfmt;
1045
1046
1047 fmt->fmt.pix.priv = 0;
1048 return 0;
1049}
1050
1051static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1052 struct v4l2_format *fmt)
1053{
1054 int w, h, mode, mode2;
1055
1056 w = fmt->fmt.pix.width;
1057 h = fmt->fmt.pix.height;
1058
1059 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1060 fmt->fmt.pix.pixelformat, w, h);
1061
1062
1063 mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat);
1064
1065
1066 if (gspca_dev->cam.cam_mode[mode].pixelformat
1067 != fmt->fmt.pix.pixelformat) {
1068
1069
1070 mode2 = gspca_get_mode(gspca_dev, mode,
1071 fmt->fmt.pix.pixelformat);
1072 if (mode2 >= 0)
1073 mode = mode2;
1074 }
1075 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1076 if (gspca_dev->sd_desc->try_fmt) {
1077
1078 fmt->fmt.pix.width = w;
1079 fmt->fmt.pix.height = h;
1080 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1081 }
1082
1083
1084 fmt->fmt.pix.priv = 0;
1085 return mode;
1086}
1087
1088static int vidioc_try_fmt_vid_cap(struct file *file,
1089 void *priv,
1090 struct v4l2_format *fmt)
1091{
1092 struct gspca_dev *gspca_dev = video_drvdata(file);
1093
1094 if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
1095 return -EINVAL;
1096 return 0;
1097}
1098
1099static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1100 struct v4l2_format *fmt)
1101{
1102 struct gspca_dev *gspca_dev = video_drvdata(file);
1103 int mode;
1104
1105 if (vb2_is_busy(&gspca_dev->queue))
1106 return -EBUSY;
1107
1108 mode = try_fmt_vid_cap(gspca_dev, fmt);
1109 if (mode < 0)
1110 return -EINVAL;
1111
1112 gspca_dev->curr_mode = mode;
1113 if (gspca_dev->sd_desc->try_fmt)
1114
1115 gspca_dev->pixfmt = fmt->fmt.pix;
1116 else
1117 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1118 return 0;
1119}
1120
1121static int vidioc_enum_framesizes(struct file *file, void *priv,
1122 struct v4l2_frmsizeenum *fsize)
1123{
1124 struct gspca_dev *gspca_dev = video_drvdata(file);
1125 int i;
1126 __u32 index = 0;
1127
1128 if (gspca_dev->sd_desc->enum_framesizes)
1129 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1130
1131 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1132 if (fsize->pixel_format !=
1133 gspca_dev->cam.cam_mode[i].pixelformat)
1134 continue;
1135
1136 if (fsize->index == index) {
1137 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1138 fsize->discrete.width =
1139 gspca_dev->cam.cam_mode[i].width;
1140 fsize->discrete.height =
1141 gspca_dev->cam.cam_mode[i].height;
1142 return 0;
1143 }
1144 index++;
1145 }
1146
1147 return -EINVAL;
1148}
1149
1150static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1151 struct v4l2_frmivalenum *fival)
1152{
1153 struct gspca_dev *gspca_dev = video_drvdata(filp);
1154 int mode;
1155 __u32 i;
1156
1157 mode = wxh_to_mode(gspca_dev, fival->width, fival->height,
1158 fival->pixel_format);
1159 if (mode < 0)
1160 return -EINVAL;
1161
1162 if (gspca_dev->cam.mode_framerates == NULL ||
1163 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1164 return -EINVAL;
1165
1166 if (fival->pixel_format !=
1167 gspca_dev->cam.cam_mode[mode].pixelformat)
1168 return -EINVAL;
1169
1170 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1171 if (fival->index == i) {
1172 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1173 fival->discrete.numerator = 1;
1174 fival->discrete.denominator =
1175 gspca_dev->cam.mode_framerates[mode].rates[i];
1176 return 0;
1177 }
1178 }
1179
1180 return -EINVAL;
1181}
1182
1183static void gspca_release(struct v4l2_device *v4l2_device)
1184{
1185 struct gspca_dev *gspca_dev =
1186 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1187
1188 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1189 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1190 kfree(gspca_dev->usb_buf);
1191 kfree(gspca_dev);
1192}
1193
1194static int vidioc_querycap(struct file *file, void *priv,
1195 struct v4l2_capability *cap)
1196{
1197 struct gspca_dev *gspca_dev = video_drvdata(file);
1198
1199 strscpy((char *)cap->driver, gspca_dev->sd_desc->name,
1200 sizeof(cap->driver));
1201 if (gspca_dev->dev->product != NULL) {
1202 strscpy((char *)cap->card, gspca_dev->dev->product,
1203 sizeof(cap->card));
1204 } else {
1205 snprintf((char *) cap->card, sizeof cap->card,
1206 "USB Camera (%04x:%04x)",
1207 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1208 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1209 }
1210 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1211 sizeof(cap->bus_info));
1212 return 0;
1213}
1214
1215static int vidioc_enum_input(struct file *file, void *priv,
1216 struct v4l2_input *input)
1217{
1218 struct gspca_dev *gspca_dev = video_drvdata(file);
1219
1220 if (input->index != 0)
1221 return -EINVAL;
1222 input->type = V4L2_INPUT_TYPE_CAMERA;
1223 input->status = gspca_dev->cam.input_flags;
1224 strscpy(input->name, gspca_dev->sd_desc->name,
1225 sizeof input->name);
1226 return 0;
1227}
1228
1229static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1230{
1231 *i = 0;
1232 return 0;
1233}
1234
1235static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1236{
1237 if (i > 0)
1238 return -EINVAL;
1239 return 0;
1240}
1241
1242static int vidioc_g_jpegcomp(struct file *file, void *priv,
1243 struct v4l2_jpegcompression *jpegcomp)
1244{
1245 struct gspca_dev *gspca_dev = video_drvdata(file);
1246
1247 gspca_dev->usb_err = 0;
1248 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1249}
1250
1251static int vidioc_s_jpegcomp(struct file *file, void *priv,
1252 const struct v4l2_jpegcompression *jpegcomp)
1253{
1254 struct gspca_dev *gspca_dev = video_drvdata(file);
1255
1256 gspca_dev->usb_err = 0;
1257 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1258}
1259
1260static int vidioc_g_parm(struct file *filp, void *priv,
1261 struct v4l2_streamparm *parm)
1262{
1263 struct gspca_dev *gspca_dev = video_drvdata(filp);
1264
1265 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1266
1267 if (!gspca_dev->sd_desc->get_streamparm)
1268 return 0;
1269
1270 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1271 gspca_dev->usb_err = 0;
1272 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1273 return gspca_dev->usb_err;
1274}
1275
1276static int vidioc_s_parm(struct file *filp, void *priv,
1277 struct v4l2_streamparm *parm)
1278{
1279 struct gspca_dev *gspca_dev = video_drvdata(filp);
1280
1281 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1282
1283 if (!gspca_dev->sd_desc->set_streamparm) {
1284 parm->parm.capture.capability = 0;
1285 return 0;
1286 }
1287
1288 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1289 gspca_dev->usb_err = 0;
1290 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1291 return gspca_dev->usb_err;
1292}
1293
1294static int gspca_queue_setup(struct vb2_queue *vq,
1295 unsigned int *nbuffers, unsigned int *nplanes,
1296 unsigned int sizes[], struct device *alloc_devs[])
1297{
1298 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1299 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1300
1301 if (*nplanes)
1302 return sizes[0] < size ? -EINVAL : 0;
1303 *nplanes = 1;
1304 sizes[0] = size;
1305 return 0;
1306}
1307
1308static int gspca_buffer_prepare(struct vb2_buffer *vb)
1309{
1310 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1311 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1312
1313 if (vb2_plane_size(vb, 0) < size) {
1314 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
1315 vb2_plane_size(vb, 0), size);
1316 return -EINVAL;
1317 }
1318 return 0;
1319}
1320
1321static void gspca_buffer_finish(struct vb2_buffer *vb)
1322{
1323 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1324
1325 if (!gspca_dev->sd_desc->dq_callback)
1326 return;
1327
1328 gspca_dev->usb_err = 0;
1329 if (gspca_dev->present)
1330 gspca_dev->sd_desc->dq_callback(gspca_dev);
1331}
1332
1333static void gspca_buffer_queue(struct vb2_buffer *vb)
1334{
1335 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1336 struct gspca_buffer *buf = to_gspca_buffer(vb);
1337 unsigned long flags;
1338
1339 spin_lock_irqsave(&gspca_dev->qlock, flags);
1340 list_add_tail(&buf->list, &gspca_dev->buf_list);
1341 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1342}
1343
1344static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
1345 enum vb2_buffer_state state)
1346{
1347 struct gspca_buffer *buf, *node;
1348 unsigned long flags;
1349
1350 spin_lock_irqsave(&gspca_dev->qlock, flags);
1351 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
1352 vb2_buffer_done(&buf->vb.vb2_buf, state);
1353 list_del(&buf->list);
1354 }
1355 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1356}
1357
1358static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
1359{
1360 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1361 int ret;
1362
1363 gspca_dev->sequence = 0;
1364
1365 ret = gspca_init_transfer(gspca_dev);
1366 if (ret)
1367 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
1368 return ret;
1369}
1370
1371static void gspca_stop_streaming(struct vb2_queue *vq)
1372{
1373 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1374
1375 gspca_stream_off(gspca_dev);
1376
1377
1378 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
1379}
1380
1381static const struct vb2_ops gspca_qops = {
1382 .queue_setup = gspca_queue_setup,
1383 .buf_prepare = gspca_buffer_prepare,
1384 .buf_finish = gspca_buffer_finish,
1385 .buf_queue = gspca_buffer_queue,
1386 .start_streaming = gspca_start_streaming,
1387 .stop_streaming = gspca_stop_streaming,
1388 .wait_prepare = vb2_ops_wait_prepare,
1389 .wait_finish = vb2_ops_wait_finish,
1390};
1391
1392static const struct v4l2_file_operations dev_fops = {
1393 .owner = THIS_MODULE,
1394 .open = v4l2_fh_open,
1395 .release = vb2_fop_release,
1396 .unlocked_ioctl = video_ioctl2,
1397 .read = vb2_fop_read,
1398 .mmap = vb2_fop_mmap,
1399 .poll = vb2_fop_poll,
1400};
1401
1402static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1403 .vidioc_querycap = vidioc_querycap,
1404 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1405 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1406 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1407 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1408 .vidioc_enum_input = vidioc_enum_input,
1409 .vidioc_g_input = vidioc_g_input,
1410 .vidioc_s_input = vidioc_s_input,
1411 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1412 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1413 .vidioc_g_parm = vidioc_g_parm,
1414 .vidioc_s_parm = vidioc_s_parm,
1415 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1416 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1417
1418 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1419 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1420 .vidioc_querybuf = vb2_ioctl_querybuf,
1421 .vidioc_qbuf = vb2_ioctl_qbuf,
1422 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1423 .vidioc_expbuf = vb2_ioctl_expbuf,
1424 .vidioc_streamon = vb2_ioctl_streamon,
1425 .vidioc_streamoff = vb2_ioctl_streamoff,
1426
1427#ifdef CONFIG_VIDEO_ADV_DEBUG
1428 .vidioc_g_chip_info = vidioc_g_chip_info,
1429 .vidioc_g_register = vidioc_g_register,
1430 .vidioc_s_register = vidioc_s_register,
1431#endif
1432 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1433 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1434};
1435
1436static const struct video_device gspca_template = {
1437 .name = "gspca main driver",
1438 .fops = &dev_fops,
1439 .ioctl_ops = &dev_ioctl_ops,
1440 .release = video_device_release_empty,
1441};
1442
1443
1444
1445
1446
1447
1448
1449int gspca_dev_probe2(struct usb_interface *intf,
1450 const struct usb_device_id *id,
1451 const struct sd_desc *sd_desc,
1452 int dev_size,
1453 struct module *module)
1454{
1455 struct gspca_dev *gspca_dev;
1456 struct usb_device *dev = interface_to_usbdev(intf);
1457 struct vb2_queue *q;
1458 int ret;
1459
1460 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
1461 sd_desc->name, id->idVendor, id->idProduct);
1462
1463
1464 if (dev_size < sizeof *gspca_dev)
1465 dev_size = sizeof *gspca_dev;
1466 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
1467 if (!gspca_dev) {
1468 pr_err("couldn't kzalloc gspca struct\n");
1469 return -ENOMEM;
1470 }
1471 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
1472 if (!gspca_dev->usb_buf) {
1473 pr_err("out of memory\n");
1474 ret = -ENOMEM;
1475 goto out;
1476 }
1477 gspca_dev->dev = dev;
1478 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
1479 gspca_dev->xfer_ep = -1;
1480
1481
1482 if (dev->actconfig->desc.bNumInterfaces != 1) {
1483 int i;
1484 struct usb_interface *intf2;
1485
1486 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
1487 intf2 = dev->actconfig->interface[i];
1488 if (intf2 != NULL
1489 && intf2->altsetting != NULL
1490 && intf2->altsetting->desc.bInterfaceClass ==
1491 USB_CLASS_AUDIO) {
1492 gspca_dev->audio = 1;
1493 break;
1494 }
1495 }
1496 }
1497
1498 gspca_dev->v4l2_dev.release = gspca_release;
1499 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
1500 if (ret)
1501 goto out;
1502 gspca_dev->present = true;
1503 gspca_dev->sd_desc = sd_desc;
1504 gspca_dev->empty_packet = -1;
1505 gspca_dev->vdev = gspca_template;
1506 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1507 gspca_dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1508 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
1509 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
1510 gspca_dev->module = module;
1511
1512 mutex_init(&gspca_dev->usb_lock);
1513 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
1514 init_waitqueue_head(&gspca_dev->wq);
1515
1516
1517 q = &gspca_dev->queue;
1518 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1519 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1520 q->drv_priv = gspca_dev;
1521 q->buf_struct_size = sizeof(struct gspca_buffer);
1522 q->ops = &gspca_qops;
1523 q->mem_ops = &vb2_vmalloc_memops;
1524 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1525 q->min_buffers_needed = 2;
1526 q->lock = &gspca_dev->usb_lock;
1527 ret = vb2_queue_init(q);
1528 if (ret)
1529 goto out;
1530 gspca_dev->vdev.queue = q;
1531
1532 INIT_LIST_HEAD(&gspca_dev->buf_list);
1533 spin_lock_init(&gspca_dev->qlock);
1534
1535
1536 ret = sd_desc->config(gspca_dev, id);
1537 if (ret < 0)
1538 goto out;
1539 ret = sd_desc->init(gspca_dev);
1540 if (ret < 0)
1541 goto out;
1542 if (sd_desc->init_controls)
1543 ret = sd_desc->init_controls(gspca_dev);
1544 if (ret < 0)
1545 goto out;
1546 gspca_set_default_mode(gspca_dev);
1547
1548 ret = gspca_input_connect(gspca_dev);
1549 if (ret)
1550 goto out;
1551
1552#ifdef CONFIG_VIDEO_ADV_DEBUG
1553 if (!gspca_dev->sd_desc->get_register)
1554 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
1555 if (!gspca_dev->sd_desc->set_register)
1556 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
1557#endif
1558 if (!gspca_dev->sd_desc->get_jcomp)
1559 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
1560 if (!gspca_dev->sd_desc->set_jcomp)
1561 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
1562
1563
1564 ret = video_register_device(&gspca_dev->vdev,
1565 VFL_TYPE_GRABBER,
1566 -1);
1567 if (ret < 0) {
1568 pr_err("video_register_device err %d\n", ret);
1569 goto out;
1570 }
1571
1572 usb_set_intfdata(intf, gspca_dev);
1573 gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
1574 video_device_node_name(&gspca_dev->vdev));
1575
1576 gspca_input_create_urb(gspca_dev);
1577
1578 return 0;
1579out:
1580#if IS_ENABLED(CONFIG_INPUT)
1581 if (gspca_dev->input_dev)
1582 input_unregister_device(gspca_dev->input_dev);
1583#endif
1584 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1585 kfree(gspca_dev->usb_buf);
1586 kfree(gspca_dev);
1587 return ret;
1588}
1589EXPORT_SYMBOL(gspca_dev_probe2);
1590
1591
1592int gspca_dev_probe(struct usb_interface *intf,
1593 const struct usb_device_id *id,
1594 const struct sd_desc *sd_desc,
1595 int dev_size,
1596 struct module *module)
1597{
1598 struct usb_device *dev = interface_to_usbdev(intf);
1599
1600
1601 if (dev->descriptor.bNumConfigurations != 1) {
1602 pr_err("%04x:%04x too many config\n",
1603 id->idVendor, id->idProduct);
1604 return -ENODEV;
1605 }
1606
1607
1608 if (dev->actconfig->desc.bNumInterfaces != 1
1609 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
1610 return -ENODEV;
1611
1612 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
1613}
1614EXPORT_SYMBOL(gspca_dev_probe);
1615
1616
1617
1618
1619
1620
1621
1622void gspca_disconnect(struct usb_interface *intf)
1623{
1624 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1625#if IS_ENABLED(CONFIG_INPUT)
1626 struct input_dev *input_dev;
1627#endif
1628
1629 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
1630 video_device_node_name(&gspca_dev->vdev));
1631
1632 mutex_lock(&gspca_dev->usb_lock);
1633 gspca_dev->present = false;
1634 destroy_urbs(gspca_dev);
1635 gspca_input_destroy_urb(gspca_dev);
1636
1637 vb2_queue_error(&gspca_dev->queue);
1638
1639#if IS_ENABLED(CONFIG_INPUT)
1640 input_dev = gspca_dev->input_dev;
1641 if (input_dev) {
1642 gspca_dev->input_dev = NULL;
1643 input_unregister_device(input_dev);
1644 }
1645#endif
1646
1647 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
1648 video_unregister_device(&gspca_dev->vdev);
1649
1650 mutex_unlock(&gspca_dev->usb_lock);
1651
1652
1653 v4l2_device_put(&gspca_dev->v4l2_dev);
1654}
1655EXPORT_SYMBOL(gspca_disconnect);
1656
1657#ifdef CONFIG_PM
1658int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1659{
1660 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1661
1662 gspca_input_destroy_urb(gspca_dev);
1663
1664 if (!vb2_start_streaming_called(&gspca_dev->queue))
1665 return 0;
1666
1667 mutex_lock(&gspca_dev->usb_lock);
1668 gspca_dev->frozen = 1;
1669 gspca_dev->usb_err = 0;
1670 if (gspca_dev->sd_desc->stopN)
1671 gspca_dev->sd_desc->stopN(gspca_dev);
1672 destroy_urbs(gspca_dev);
1673 gspca_set_alt0(gspca_dev);
1674 if (gspca_dev->sd_desc->stop0)
1675 gspca_dev->sd_desc->stop0(gspca_dev);
1676 mutex_unlock(&gspca_dev->usb_lock);
1677
1678 return 0;
1679}
1680EXPORT_SYMBOL(gspca_suspend);
1681
1682int gspca_resume(struct usb_interface *intf)
1683{
1684 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1685 int streaming, ret = 0;
1686
1687 mutex_lock(&gspca_dev->usb_lock);
1688 gspca_dev->frozen = 0;
1689 gspca_dev->usb_err = 0;
1690 gspca_dev->sd_desc->init(gspca_dev);
1691
1692
1693
1694
1695
1696 streaming = vb2_start_streaming_called(&gspca_dev->queue);
1697 if (streaming)
1698 ret = gspca_init_transfer(gspca_dev);
1699 else
1700 gspca_input_create_urb(gspca_dev);
1701 mutex_unlock(&gspca_dev->usb_lock);
1702
1703 return ret;
1704}
1705EXPORT_SYMBOL(gspca_resume);
1706#endif
1707
1708
1709static int __init gspca_init(void)
1710{
1711 pr_info("v" GSPCA_VERSION " registered\n");
1712 return 0;
1713}
1714static void __exit gspca_exit(void)
1715{
1716}
1717
1718module_init(gspca_init);
1719module_exit(gspca_exit);
1720
1721module_param_named(debug, gspca_debug, int, 0644);
1722MODULE_PARM_DESC(debug,
1723 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
1724
