]> git.ipfire.org Git - thirdparty/kernel/stable.git/blob - drivers/media/usb/gspca/gspca.c
projects / thirdparty / kernel / stable.git / blob
? search:


25edd21896540291a48a857abb35b2137bdd7604
[thirdparty/kernel/stable.git] / drivers / media / usb / gspca / gspca.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Main USB camera driver
4 *
5 * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
6 *
7 * Camera button input handling by Márton Németh
8 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
9 */
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 /* global values */
40 #define DEF_NURBS 3 /* default number of URBs */
41 #if DEF_NURBS > MAX_NURBS
42 #error "DEF_NURBS too big"
43 #endif
44
45 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
46 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
47 MODULE_LICENSE("GPL");
48 MODULE_VERSION(GSPCA_VERSION);
49
50 int gspca_debug;
51 EXPORT_SYMBOL(gspca_debug);
52
53 static 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 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
73 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
74 #define GSPCA_MEMORY_READ 7
75
76 /*
77 * Input and interrupt endpoint handling functions
78 */
79 #if IS_ENABLED(CONFIG_INPUT)
80 static 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 /* Stop is requested either by software or hardware is gone,
99 * keep the ret value non-zero and don't resubmit later.
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
117 static 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
154 static 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
197 error_submit:
198 usb_free_coherent(dev,
199 urb->transfer_buffer_length,
200 urb->transfer_buffer,
201 urb->transfer_dma);
202 error_buffer:
203 usb_free_urb(urb);
204 error:
205 return ret;
206 }
207
208 static 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
230 static 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
246 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
247 {
248 }
249
250 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
251 {
252 }
253
254 static inline int gspca_input_connect(struct gspca_dev *dev)
255 {
256 return 0;
257 }
258 #endif
259
260 /*
261 * fill a video frame from an URB and resubmit
262 */
263 static void fill_frame(struct gspca_dev *gspca_dev,
264 struct urb *urb)
265 {
266 u8 *data; /* address of data in the iso message */
267 int i, len, st;
268 cam_pkt_op pkt_scan;
269
270 if (urb->status != 0) {
271 if (urb->status == -ESHUTDOWN)
272 return; /* disconnection */
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 /* check the packet status and length */
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 /* let the packet be analyzed by the subdriver */
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
307 resubmit:
308 if (!gspca_dev->streaming)
309 return;
310 /* resubmit the URB */
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 * ISOC message interrupt from the USB device
318 *
319 * Analyse each packet and call the subdriver for copy to the frame buffer.
320 */
321 static 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 * bulk message interrupt from the USB device
333 */
334 static 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; /* disconnection */
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
362 resubmit:
363 if (!gspca_dev->streaming)
364 return;
365 /* resubmit the URB */
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 * add data to the current frame
375 *
376 * This function is called by the subdrivers at interrupt level.
377 *
378 * To build a frame, these ones must add
379 * - one FIRST_PACKET
380 * - 0 or many INTER_PACKETs
381 * - one LAST_PACKET
382 * DISCARD_PACKET invalidates the whole frame.
383 */
384 void 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 /* if there is no queued buffer, discard the whole frame */
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 /* append the packet to the frame buffer */
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 /* !! image is NULL only when last pkt is LAST or DISCARD
431 if (gspca_dev->image == NULL) {
432 pr_err("gspca_frame_add() image == NULL\n");
433 return;
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 /* if last packet, invalidate packet concatenation until
444 * next first packet, wake up the application and advance
445 * in the queue */
446 if (packet_type == LAST_PACKET) {
447 if (gspca_dev->image_len > gspca_dev->pixfmt.sizeimage)
448 gspca_dev->image_len = gspca_dev->pixfmt.sizeimage;
449 spin_lock_irqsave(&gspca_dev->qlock, flags);
450 list_del(&buf->list);
451 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
452 buf->vb.vb2_buf.timestamp = ktime_get_ns();
453 vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
454 gspca_dev->image_len);
455 buf->vb.sequence = gspca_dev->sequence++;
456 buf->vb.field = V4L2_FIELD_NONE;
457 gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n",
458 gspca_dev->image_len);
459 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
460 gspca_dev->image = NULL;
461 gspca_dev->image_len = 0;
462 }
463 }
464 EXPORT_SYMBOL(gspca_frame_add);
465
466 static void destroy_urbs(struct gspca_dev *gspca_dev)
467 {
468 struct urb *urb;
469 unsigned int i;
470
471 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
472
473 /* Killing all URBs guarantee that no URB completion
474 * handler is running. Therefore, there shouldn't
475 * be anyone trying to access gspca_dev->urb[i]
476 */
477 for (i = 0; i < MAX_NURBS; i++)
478 usb_kill_urb(gspca_dev->urb[i]);
479
480 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
481 for (i = 0; i < MAX_NURBS; i++) {
482 urb = gspca_dev->urb[i];
483 if (!urb)
484 continue;
485 gspca_dev->urb[i] = NULL;
486 usb_free_coherent(gspca_dev->dev,
487 urb->transfer_buffer_length,
488 urb->transfer_buffer,
489 urb->transfer_dma);
490 usb_free_urb(urb);
491 }
492 }
493
494 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
495 {
496 int ret;
497
498 if (gspca_dev->alt == 0)
499 return 0;
500 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
501 if (ret < 0)
502 pr_err("set alt 0 err %d\n", ret);
503 return ret;
504 }
505
506 /*
507 * look for an input transfer endpoint in an alternate setting.
508 *
509 * If xfer_ep is invalid, return the first valid ep found, otherwise
510 * look for exactly the ep with address equal to xfer_ep.
511 */
512 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
513 int xfer, int xfer_ep)
514 {
515 struct usb_host_endpoint *ep;
516 int i, attr;
517
518 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
519 ep = &alt->endpoint[i];
520 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
521 if (attr == xfer
522 && ep->desc.wMaxPacketSize != 0
523 && usb_endpoint_dir_in(&ep->desc)
524 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
525 return ep;
526 }
527 return NULL;
528 }
529
530 /* compute the minimum bandwidth for the current transfer */
531 static u32 which_bandwidth(struct gspca_dev *gspca_dev)
532 {
533 u32 bandwidth;
534
535 /* get the (max) image size */
536 bandwidth = gspca_dev->pixfmt.sizeimage;
537
538 /* if the image is compressed, estimate its mean size */
539 if (!gspca_dev->cam.needs_full_bandwidth &&
540 bandwidth < gspca_dev->pixfmt.width *
541 gspca_dev->pixfmt.height)
542 bandwidth = bandwidth * 3 / 8; /* 0.375 */
543
544 /* estimate the frame rate */
545 if (gspca_dev->sd_desc->get_streamparm) {
546 struct v4l2_streamparm parm;
547
548 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
549 bandwidth *= parm.parm.capture.timeperframe.denominator;
550 bandwidth /= parm.parm.capture.timeperframe.numerator;
551 } else {
552
553 /* don't hope more than 15 fps with USB 1.1 and
554 * image resolution >= 640x480 */
555 if (gspca_dev->pixfmt.width >= 640
556 && gspca_dev->dev->speed == USB_SPEED_FULL)
557 bandwidth *= 15; /* 15 fps */
558 else
559 bandwidth *= 30; /* 30 fps */
560 }
561
562 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
563 return bandwidth;
564 }
565
566 /* endpoint table */
567 #define MAX_ALT 16
568 struct ep_tb_s {
569 u32 alt;
570 u32 bandwidth;
571 };
572
573 /*
574 * build the table of the endpoints
575 * and compute the minimum bandwidth for the image transfer
576 */
577 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
578 struct usb_interface *intf,
579 struct ep_tb_s *ep_tb)
580 {
581 struct usb_host_endpoint *ep;
582 int i, j, nbalt, psize, found;
583 u32 bandwidth, last_bw;
584
585 nbalt = intf->num_altsetting;
586 if (nbalt > MAX_ALT)
587 nbalt = MAX_ALT; /* fixme: should warn */
588
589 /* build the endpoint table */
590 i = 0;
591 last_bw = 0;
592 for (;;) {
593 ep_tb->bandwidth = 2000 * 2000 * 120;
594 found = 0;
595 for (j = 0; j < nbalt; j++) {
596 ep = alt_xfer(&intf->altsetting[j],
597 USB_ENDPOINT_XFER_ISOC,
598 gspca_dev->xfer_ep);
599 if (ep == NULL)
600 continue;
601 if (ep->desc.bInterval == 0) {
602 pr_err("alt %d iso endp with 0 interval\n", j);
603 continue;
604 }
605 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
606 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
607 bandwidth = psize * 1000;
608 if (gspca_dev->dev->speed == USB_SPEED_HIGH
609 || gspca_dev->dev->speed >= USB_SPEED_SUPER)
610 bandwidth *= 8;
611 bandwidth /= 1 << (ep->desc.bInterval - 1);
612 if (bandwidth <= last_bw)
613 continue;
614 if (bandwidth < ep_tb->bandwidth) {
615 ep_tb->bandwidth = bandwidth;
616 ep_tb->alt = j;
617 found = 1;
618 }
619 }
620 if (!found)
621 break;
622 gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n",
623 ep_tb->alt, ep_tb->bandwidth);
624 last_bw = ep_tb->bandwidth;
625 i++;
626 ep_tb++;
627 }
628
629 /*
630 * If the camera:
631 * has a usb audio class interface (a built in usb mic); and
632 * is a usb 1 full speed device; and
633 * uses the max full speed iso bandwidth; and
634 * and has more than 1 alt setting
635 * then skip the highest alt setting to spare bandwidth for the mic
636 */
637 if (gspca_dev->audio &&
638 gspca_dev->dev->speed == USB_SPEED_FULL &&
639 last_bw >= 1000000 &&
640 i > 1) {
641 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
642 i--;
643 ep_tb--;
644 }
645
646 /* get the requested bandwidth and start at the highest atlsetting */
647 bandwidth = which_bandwidth(gspca_dev);
648 ep_tb--;
649 while (i > 1) {
650 ep_tb--;
651 if (ep_tb->bandwidth < bandwidth)
652 break;
653 i--;
654 }
655 return i;
656 }
657
658 /*
659 * create the URBs for image transfer
660 */
661 static int create_urbs(struct gspca_dev *gspca_dev,
662 struct usb_host_endpoint *ep)
663 {
664 struct urb *urb;
665 int n, nurbs, i, psize, npkt, bsize;
666
667 /* calculate the packet size and the number of packets */
668 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
669
670 if (!gspca_dev->cam.bulk) { /* isoc */
671
672 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
673 if (gspca_dev->pkt_size == 0)
674 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
675 else
676 psize = gspca_dev->pkt_size;
677 npkt = gspca_dev->cam.npkt;
678 if (npkt == 0)
679 npkt = 32; /* default value */
680 bsize = psize * npkt;
681 gspca_dbg(gspca_dev, D_STREAM,
682 "isoc %d pkts size %d = bsize:%d\n",
683 npkt, psize, bsize);
684 nurbs = DEF_NURBS;
685 } else { /* bulk */
686 npkt = 0;
687 bsize = gspca_dev->cam.bulk_size;
688 if (bsize == 0)
689 bsize = psize;
690 gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize);
691 if (gspca_dev->cam.bulk_nurbs != 0)
692 nurbs = gspca_dev->cam.bulk_nurbs;
693 else
694 nurbs = 1;
695 }
696
697 for (n = 0; n < nurbs; n++) {
698 urb = usb_alloc_urb(npkt, GFP_KERNEL);
699 if (!urb)
700 return -ENOMEM;
701 gspca_dev->urb[n] = urb;
702 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
703 bsize,
704 GFP_KERNEL,
705 &urb->transfer_dma);
706
707 if (urb->transfer_buffer == NULL) {
708 pr_err("usb_alloc_coherent failed\n");
709 return -ENOMEM;
710 }
711 urb->dev = gspca_dev->dev;
712 urb->context = gspca_dev;
713 urb->transfer_buffer_length = bsize;
714 if (npkt != 0) { /* ISOC */
715 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
716 ep->desc.bEndpointAddress);
717 urb->transfer_flags = URB_ISO_ASAP
718 | URB_NO_TRANSFER_DMA_MAP;
719 urb->interval = 1 << (ep->desc.bInterval - 1);
720 urb->complete = isoc_irq;
721 urb->number_of_packets = npkt;
722 for (i = 0; i < npkt; i++) {
723 urb->iso_frame_desc[i].length = psize;
724 urb->iso_frame_desc[i].offset = psize * i;
725 }
726 } else { /* bulk */
727 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
728 ep->desc.bEndpointAddress);
729 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
730 urb->complete = bulk_irq;
731 }
732 }
733 return 0;
734 }
735
736 /* Note: both the queue and the usb locks should be held when calling this */
737 static void gspca_stream_off(struct gspca_dev *gspca_dev)
738 {
739 gspca_dev->streaming = false;
740 gspca_dev->usb_err = 0;
741 if (gspca_dev->sd_desc->stopN)
742 gspca_dev->sd_desc->stopN(gspca_dev);
743 destroy_urbs(gspca_dev);
744 gspca_input_destroy_urb(gspca_dev);
745 gspca_set_alt0(gspca_dev);
746 if (gspca_dev->present)
747 gspca_input_create_urb(gspca_dev);
748 if (gspca_dev->sd_desc->stop0)
749 gspca_dev->sd_desc->stop0(gspca_dev);
750 gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n");
751 }
752
753 /*
754 * start the USB transfer
755 */
756 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
757 {
758 struct usb_interface *intf;
759 struct usb_host_endpoint *ep;
760 struct urb *urb;
761 struct ep_tb_s ep_tb[MAX_ALT];
762 int n, ret, xfer, alt, alt_idx;
763
764 /* reset the streaming variables */
765 gspca_dev->image = NULL;
766 gspca_dev->image_len = 0;
767 gspca_dev->last_packet_type = DISCARD_PACKET;
768
769 gspca_dev->usb_err = 0;
770
771 /* do the specific subdriver stuff before endpoint selection */
772 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
773 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
774 if (gspca_dev->sd_desc->isoc_init) {
775 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
776 if (ret < 0)
777 return ret;
778 }
779 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
780 : USB_ENDPOINT_XFER_ISOC;
781
782 /* if bulk or the subdriver forced an altsetting, get the endpoint */
783 if (gspca_dev->alt != 0) {
784 gspca_dev->alt--; /* (previous version compatibility) */
785 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
786 gspca_dev->xfer_ep);
787 if (ep == NULL) {
788 pr_err("bad altsetting %d\n", gspca_dev->alt);
789 return -EIO;
790 }
791 ep_tb[0].alt = gspca_dev->alt;
792 alt_idx = 1;
793 } else {
794 /* else, compute the minimum bandwidth
795 * and build the endpoint table */
796 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
797 if (alt_idx <= 0) {
798 pr_err("no transfer endpoint found\n");
799 return -EIO;
800 }
801 }
802
803 /* set the highest alternate setting and
804 * loop until urb submit succeeds */
805 gspca_input_destroy_urb(gspca_dev);
806
807 gspca_dev->alt = ep_tb[--alt_idx].alt;
808 alt = -1;
809 for (;;) {
810 if (alt != gspca_dev->alt) {
811 alt = gspca_dev->alt;
812 if (intf->num_altsetting > 1) {
813 ret = usb_set_interface(gspca_dev->dev,
814 gspca_dev->iface,
815 alt);
816 if (ret < 0) {
817 if (ret == -ENOSPC)
818 goto retry; /*fixme: ugly*/
819 pr_err("set alt %d err %d\n", alt, ret);
820 goto out;
821 }
822 }
823 }
824 if (!gspca_dev->cam.no_urb_create) {
825 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
826 alt);
827 ret = create_urbs(gspca_dev,
828 alt_xfer(&intf->altsetting[alt], xfer,
829 gspca_dev->xfer_ep));
830 if (ret < 0) {
831 destroy_urbs(gspca_dev);
832 goto out;
833 }
834 }
835
836 /* clear the bulk endpoint */
837 if (gspca_dev->cam.bulk)
838 usb_clear_halt(gspca_dev->dev,
839 gspca_dev->urb[0]->pipe);
840
841 /* start the cam */
842 ret = gspca_dev->sd_desc->start(gspca_dev);
843 if (ret < 0) {
844 destroy_urbs(gspca_dev);
845 goto out;
846 }
847 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
848 gspca_dev->streaming = true;
849
850 /* some bulk transfers are started by the subdriver */
851 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
852 break;
853
854 /* submit the URBs */
855 for (n = 0; n < MAX_NURBS; n++) {
856 urb = gspca_dev->urb[n];
857 if (urb == NULL)
858 break;
859 ret = usb_submit_urb(urb, GFP_KERNEL);
860 if (ret < 0)
861 break;
862 }
863 if (ret >= 0)
864 break; /* transfer is started */
865
866 /* something when wrong
867 * stop the webcam and free the transfer resources */
868 gspca_stream_off(gspca_dev);
869 if (ret != -ENOSPC) {
870 pr_err("usb_submit_urb alt %d err %d\n",
871 gspca_dev->alt, ret);
872 goto out;
873 }
874
875 /* the bandwidth is not wide enough
876 * negotiate or try a lower alternate setting */
877 retry:
878 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
879 alt);
880 msleep(20); /* wait for kill complete */
881 if (gspca_dev->sd_desc->isoc_nego) {
882 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
883 if (ret < 0)
884 goto out;
885 } else {
886 if (alt_idx <= 0) {
887 pr_err("no transfer endpoint found\n");
888 ret = -EIO;
889 goto out;
890 }
891 gspca_dev->alt = ep_tb[--alt_idx].alt;
892 }
893 }
894 out:
895 gspca_input_create_urb(gspca_dev);
896 return ret;
897 }
898
899 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
900 {
901 int i;
902
903 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
904 gspca_dev->curr_mode = i;
905 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
906
907 /* does nothing if ctrl_handler == NULL */
908 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
909 }
910
911 static int wxh_to_mode(struct gspca_dev *gspca_dev,
912 int width, int height, u32 pixelformat)
913 {
914 int i;
915
916 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
917 if (width == gspca_dev->cam.cam_mode[i].width
918 && height == gspca_dev->cam.cam_mode[i].height
919 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
920 return i;
921 }
922 return -EINVAL;
923 }
924
925 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
926 int width, int height, u32 pixelformat)
927 {
928 int i;
929
930 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
931 if (width >= gspca_dev->cam.cam_mode[i].width
932 && height >= gspca_dev->cam.cam_mode[i].height
933 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
934 return i;
935 }
936 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
937 if (width >= gspca_dev->cam.cam_mode[i].width
938 && height >= gspca_dev->cam.cam_mode[i].height)
939 break;
940 }
941 return i;
942 }
943
944 /*
945 * search a mode with the right pixel format
946 */
947 static int gspca_get_mode(struct gspca_dev *gspca_dev,
948 int mode,
949 int pixfmt)
950 {
951 int modeU, modeD;
952
953 modeU = modeD = mode;
954 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
955 if (--modeD >= 0) {
956 if (gspca_dev->cam.cam_mode[modeD].pixelformat
957 == pixfmt)
958 return modeD;
959 }
960 if (++modeU < gspca_dev->cam.nmodes) {
961 if (gspca_dev->cam.cam_mode[modeU].pixelformat
962 == pixfmt)
963 return modeU;
964 }
965 }
966 return -EINVAL;
967 }
968
969 #ifdef CONFIG_VIDEO_ADV_DEBUG
970 static int vidioc_g_chip_info(struct file *file, void *priv,
971 struct v4l2_dbg_chip_info *chip)
972 {
973 struct gspca_dev *gspca_dev = video_drvdata(file);
974
975 gspca_dev->usb_err = 0;
976 if (gspca_dev->sd_desc->get_chip_info)
977 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
978 return chip->match.addr ? -EINVAL : 0;
979 }
980
981 static int vidioc_g_register(struct file *file, void *priv,
982 struct v4l2_dbg_register *reg)
983 {
984 struct gspca_dev *gspca_dev = video_drvdata(file);
985
986 gspca_dev->usb_err = 0;
987 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
988 }
989
990 static int vidioc_s_register(struct file *file, void *priv,
991 const struct v4l2_dbg_register *reg)
992 {
993 struct gspca_dev *gspca_dev = video_drvdata(file);
994
995 gspca_dev->usb_err = 0;
996 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
997 }
998 #endif
999
1000 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1001 struct v4l2_fmtdesc *fmtdesc)
1002 {
1003 struct gspca_dev *gspca_dev = video_drvdata(file);
1004 int i, j, index;
1005 __u32 fmt_tb[8];
1006
1007 /* give an index to each format */
1008 index = 0;
1009 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1010 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1011 j = 0;
1012 for (;;) {
1013 if (fmt_tb[j] == fmt_tb[index])
1014 break;
1015 j++;
1016 }
1017 if (j == index) {
1018 if (fmtdesc->index == index)
1019 break; /* new format */
1020 index++;
1021 if (index >= ARRAY_SIZE(fmt_tb))
1022 return -EINVAL;
1023 }
1024 }
1025 if (i < 0)
1026 return -EINVAL; /* no more format */
1027
1028 fmtdesc->pixelformat = fmt_tb[index];
1029 return 0;
1030 }
1031
1032 static int vidioc_g_fmt_vid_cap(struct file *file, void *_priv,
1033 struct v4l2_format *fmt)
1034 {
1035 struct gspca_dev *gspca_dev = video_drvdata(file);
1036 u32 priv = fmt->fmt.pix.priv;
1037
1038 fmt->fmt.pix = gspca_dev->pixfmt;
1039 /* some drivers use priv internally, so keep the original value */
1040 fmt->fmt.pix.priv = priv;
1041 return 0;
1042 }
1043
1044 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1045 struct v4l2_format *fmt)
1046 {
1047 int w, h, mode, mode2;
1048
1049 w = fmt->fmt.pix.width;
1050 h = fmt->fmt.pix.height;
1051
1052 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1053 fmt->fmt.pix.pixelformat, w, h);
1054
1055 /* search the nearest mode for width and height */
1056 mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat);
1057
1058 /* OK if right palette */
1059 if (gspca_dev->cam.cam_mode[mode].pixelformat
1060 != fmt->fmt.pix.pixelformat) {
1061
1062 /* else, search the closest mode with the same pixel format */
1063 mode2 = gspca_get_mode(gspca_dev, mode,
1064 fmt->fmt.pix.pixelformat);
1065 if (mode2 >= 0)
1066 mode = mode2;
1067 }
1068 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1069 if (gspca_dev->sd_desc->try_fmt) {
1070 /* pass original resolution to subdriver try_fmt */
1071 fmt->fmt.pix.width = w;
1072 fmt->fmt.pix.height = h;
1073 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1074 }
1075 return mode; /* used when s_fmt */
1076 }
1077
1078 static int vidioc_try_fmt_vid_cap(struct file *file, void *_priv,
1079 struct v4l2_format *fmt)
1080 {
1081 struct gspca_dev *gspca_dev = video_drvdata(file);
1082 u32 priv = fmt->fmt.pix.priv;
1083
1084 if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
1085 return -EINVAL;
1086 /* some drivers use priv internally, so keep the original value */
1087 fmt->fmt.pix.priv = priv;
1088 return 0;
1089 }
1090
1091 static int vidioc_s_fmt_vid_cap(struct file *file, void *_priv,
1092 struct v4l2_format *fmt)
1093 {
1094 struct gspca_dev *gspca_dev = video_drvdata(file);
1095 u32 priv = fmt->fmt.pix.priv;
1096 int mode;
1097
1098 if (vb2_is_busy(&gspca_dev->queue))
1099 return -EBUSY;
1100
1101 mode = try_fmt_vid_cap(gspca_dev, fmt);
1102 if (mode < 0)
1103 return -EINVAL;
1104
1105 gspca_dev->curr_mode = mode;
1106 if (gspca_dev->sd_desc->try_fmt)
1107 /* subdriver try_fmt can modify format parameters */
1108 gspca_dev->pixfmt = fmt->fmt.pix;
1109 else
1110 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1111 /* some drivers use priv internally, so keep the original value */
1112 fmt->fmt.pix.priv = priv;
1113 return 0;
1114 }
1115
1116 static int vidioc_enum_framesizes(struct file *file, void *priv,
1117 struct v4l2_frmsizeenum *fsize)
1118 {
1119 struct gspca_dev *gspca_dev = video_drvdata(file);
1120 int i;
1121 __u32 index = 0;
1122
1123 if (gspca_dev->sd_desc->enum_framesizes)
1124 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1125
1126 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1127 if (fsize->pixel_format !=
1128 gspca_dev->cam.cam_mode[i].pixelformat)
1129 continue;
1130
1131 if (fsize->index == index) {
1132 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1133 fsize->discrete.width =
1134 gspca_dev->cam.cam_mode[i].width;
1135 fsize->discrete.height =
1136 gspca_dev->cam.cam_mode[i].height;
1137 return 0;
1138 }
1139 index++;
1140 }
1141
1142 return -EINVAL;
1143 }
1144
1145 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1146 struct v4l2_frmivalenum *fival)
1147 {
1148 struct gspca_dev *gspca_dev = video_drvdata(filp);
1149 int mode;
1150 __u32 i;
1151
1152 mode = wxh_to_mode(gspca_dev, fival->width, fival->height,
1153 fival->pixel_format);
1154 if (mode < 0)
1155 return -EINVAL;
1156
1157 if (gspca_dev->cam.mode_framerates == NULL ||
1158 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1159 return -EINVAL;
1160
1161 if (fival->pixel_format !=
1162 gspca_dev->cam.cam_mode[mode].pixelformat)
1163 return -EINVAL;
1164
1165 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1166 if (fival->index == i) {
1167 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1168 fival->discrete.numerator = 1;
1169 fival->discrete.denominator =
1170 gspca_dev->cam.mode_framerates[mode].rates[i];
1171 return 0;
1172 }
1173 }
1174
1175 return -EINVAL;
1176 }
1177
1178 static void gspca_release(struct v4l2_device *v4l2_device)
1179 {
1180 struct gspca_dev *gspca_dev =
1181 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1182
1183 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1184 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1185 kfree(gspca_dev->usb_buf);
1186 kfree(gspca_dev);
1187 }
1188
1189 static int vidioc_querycap(struct file *file, void *priv,
1190 struct v4l2_capability *cap)
1191 {
1192 struct gspca_dev *gspca_dev = video_drvdata(file);
1193
1194 strscpy((char *)cap->driver, gspca_dev->sd_desc->name,
1195 sizeof(cap->driver));
1196 if (gspca_dev->dev->product != NULL) {
1197 strscpy((char *)cap->card, gspca_dev->dev->product,
1198 sizeof(cap->card));
1199 } else {
1200 snprintf((char *) cap->card, sizeof cap->card,
1201 "USB Camera (%04x:%04x)",
1202 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1203 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1204 }
1205 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1206 sizeof(cap->bus_info));
1207 return 0;
1208 }
1209
1210 static int vidioc_enum_input(struct file *file, void *priv,
1211 struct v4l2_input *input)
1212 {
1213 struct gspca_dev *gspca_dev = video_drvdata(file);
1214
1215 if (input->index != 0)
1216 return -EINVAL;
1217 input->type = V4L2_INPUT_TYPE_CAMERA;
1218 input->status = gspca_dev->cam.input_flags;
1219 strscpy(input->name, gspca_dev->sd_desc->name,
1220 sizeof input->name);
1221 return 0;
1222 }
1223
1224 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1225 {
1226 *i = 0;
1227 return 0;
1228 }
1229
1230 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1231 {
1232 if (i > 0)
1233 return -EINVAL;
1234 return 0;
1235 }
1236
1237 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1238 struct v4l2_jpegcompression *jpegcomp)
1239 {
1240 struct gspca_dev *gspca_dev = video_drvdata(file);
1241
1242 gspca_dev->usb_err = 0;
1243 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1244 }
1245
1246 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1247 const struct v4l2_jpegcompression *jpegcomp)
1248 {
1249 struct gspca_dev *gspca_dev = video_drvdata(file);
1250
1251 gspca_dev->usb_err = 0;
1252 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1253 }
1254
1255 static int vidioc_g_parm(struct file *filp, void *priv,
1256 struct v4l2_streamparm *parm)
1257 {
1258 struct gspca_dev *gspca_dev = video_drvdata(filp);
1259
1260 parm->parm.capture.readbuffers = gspca_dev->queue.min_queued_buffers;
1261
1262 if (!gspca_dev->sd_desc->get_streamparm)
1263 return 0;
1264
1265 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1266 gspca_dev->usb_err = 0;
1267 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1268 return gspca_dev->usb_err;
1269 }
1270
1271 static int vidioc_s_parm(struct file *filp, void *priv,
1272 struct v4l2_streamparm *parm)
1273 {
1274 struct gspca_dev *gspca_dev = video_drvdata(filp);
1275
1276 parm->parm.capture.readbuffers = gspca_dev->queue.min_queued_buffers;
1277
1278 if (!gspca_dev->sd_desc->set_streamparm) {
1279 parm->parm.capture.capability = 0;
1280 return 0;
1281 }
1282
1283 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1284 gspca_dev->usb_err = 0;
1285 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1286 return gspca_dev->usb_err;
1287 }
1288
1289 static int gspca_queue_setup(struct vb2_queue *vq,
1290 unsigned int *nbuffers, unsigned int *nplanes,
1291 unsigned int sizes[], struct device *alloc_devs[])
1292 {
1293 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1294 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1295
1296 if (*nplanes)
1297 return sizes[0] < size ? -EINVAL : 0;
1298 *nplanes = 1;
1299 sizes[0] = size;
1300 return 0;
1301 }
1302
1303 static int gspca_buffer_prepare(struct vb2_buffer *vb)
1304 {
1305 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1306 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1307
1308 if (vb2_plane_size(vb, 0) < size) {
1309 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
1310 vb2_plane_size(vb, 0), size);
1311 return -EINVAL;
1312 }
1313 return 0;
1314 }
1315
1316 static void gspca_buffer_finish(struct vb2_buffer *vb)
1317 {
1318 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1319
1320 if (!gspca_dev->sd_desc->dq_callback)
1321 return;
1322
1323 gspca_dev->usb_err = 0;
1324 if (gspca_dev->present)
1325 gspca_dev->sd_desc->dq_callback(gspca_dev);
1326 }
1327
1328 static void gspca_buffer_queue(struct vb2_buffer *vb)
1329 {
1330 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1331 struct gspca_buffer *buf = to_gspca_buffer(vb);
1332 unsigned long flags;
1333
1334 spin_lock_irqsave(&gspca_dev->qlock, flags);
1335 list_add_tail(&buf->list, &gspca_dev->buf_list);
1336 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1337 }
1338
1339 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
1340 enum vb2_buffer_state state)
1341 {
1342 struct gspca_buffer *buf, *node;
1343 unsigned long flags;
1344
1345 spin_lock_irqsave(&gspca_dev->qlock, flags);
1346 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
1347 vb2_buffer_done(&buf->vb.vb2_buf, state);
1348 list_del(&buf->list);
1349 }
1350 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1351 }
1352
1353 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
1354 {
1355 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1356 int ret;
1357
1358 gspca_dev->sequence = 0;
1359
1360 ret = gspca_init_transfer(gspca_dev);
1361 if (ret)
1362 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
1363 return ret;
1364 }
1365
1366 static void gspca_stop_streaming(struct vb2_queue *vq)
1367 {
1368 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1369
1370 gspca_stream_off(gspca_dev);
1371
1372 /* Release all active buffers */
1373 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
1374 }
1375
1376 static const struct vb2_ops gspca_qops = {
1377 .queue_setup = gspca_queue_setup,
1378 .buf_prepare = gspca_buffer_prepare,
1379 .buf_finish = gspca_buffer_finish,
1380 .buf_queue = gspca_buffer_queue,
1381 .start_streaming = gspca_start_streaming,
1382 .stop_streaming = gspca_stop_streaming,
1383 };
1384
1385 static const struct v4l2_file_operations dev_fops = {
1386 .owner = THIS_MODULE,
1387 .open = v4l2_fh_open,
1388 .release = vb2_fop_release,
1389 .unlocked_ioctl = video_ioctl2,
1390 .read = vb2_fop_read,
1391 .mmap = vb2_fop_mmap,
1392 .poll = vb2_fop_poll,
1393 };
1394
1395 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1396 .vidioc_querycap = vidioc_querycap,
1397 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1398 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1399 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1400 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1401 .vidioc_enum_input = vidioc_enum_input,
1402 .vidioc_g_input = vidioc_g_input,
1403 .vidioc_s_input = vidioc_s_input,
1404 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1405 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1406 .vidioc_g_parm = vidioc_g_parm,
1407 .vidioc_s_parm = vidioc_s_parm,
1408 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1409 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1410
1411 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1412 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1413 .vidioc_querybuf = vb2_ioctl_querybuf,
1414 .vidioc_qbuf = vb2_ioctl_qbuf,
1415 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1416 .vidioc_expbuf = vb2_ioctl_expbuf,
1417 .vidioc_streamon = vb2_ioctl_streamon,
1418 .vidioc_streamoff = vb2_ioctl_streamoff,
1419
1420 #ifdef CONFIG_VIDEO_ADV_DEBUG
1421 .vidioc_g_chip_info = vidioc_g_chip_info,
1422 .vidioc_g_register = vidioc_g_register,
1423 .vidioc_s_register = vidioc_s_register,
1424 #endif
1425 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1426 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1427 };
1428
1429 static const struct video_device gspca_template = {
1430 .name = "gspca main driver",
1431 .fops = &dev_fops,
1432 .ioctl_ops = &dev_ioctl_ops,
1433 .release = video_device_release_empty, /* We use v4l2_dev.release */
1434 };
1435
1436 /*
1437 * probe and create a new gspca device
1438 *
1439 * This function must be called by the sub-driver when it is
1440 * called for probing a new device.
1441 */
1442 int gspca_dev_probe2(struct usb_interface *intf,
1443 const struct usb_device_id *id,
1444 const struct sd_desc *sd_desc,
1445 int dev_size,
1446 struct module *module)
1447 {
1448 struct gspca_dev *gspca_dev;
1449 struct usb_device *dev = interface_to_usbdev(intf);
1450 struct vb2_queue *q;
1451 int ret;
1452
1453 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
1454 sd_desc->name, id->idVendor, id->idProduct);
1455
1456 /* create the device */
1457 if (dev_size < sizeof *gspca_dev)
1458 dev_size = sizeof *gspca_dev;
1459 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
1460 if (!gspca_dev) {
1461 pr_err("couldn't kzalloc gspca struct\n");
1462 return -ENOMEM;
1463 }
1464 gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL);
1465 if (!gspca_dev->usb_buf) {
1466 pr_err("out of memory\n");
1467 ret = -ENOMEM;
1468 goto out;
1469 }
1470 gspca_dev->dev = dev;
1471 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
1472 gspca_dev->xfer_ep = -1;
1473
1474 /* check if any audio device */
1475 if (dev->actconfig->desc.bNumInterfaces != 1) {
1476 int i;
1477 struct usb_interface *intf2;
1478
1479 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
1480 intf2 = dev->actconfig->interface[i];
1481 if (intf2 != NULL
1482 && intf2->altsetting != NULL
1483 && intf2->altsetting->desc.bInterfaceClass ==
1484 USB_CLASS_AUDIO) {
1485 gspca_dev->audio = 1;
1486 break;
1487 }
1488 }
1489 }
1490
1491 gspca_dev->v4l2_dev.release = gspca_release;
1492 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
1493 if (ret)
1494 goto out;
1495 gspca_dev->present = true;
1496 gspca_dev->sd_desc = sd_desc;
1497 gspca_dev->empty_packet = -1; /* don't check the empty packets */
1498 gspca_dev->vdev = gspca_template;
1499 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1500 gspca_dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1501 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
1502 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
1503 gspca_dev->module = module;
1504
1505 mutex_init(&gspca_dev->usb_lock);
1506 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
1507 init_waitqueue_head(&gspca_dev->wq);
1508
1509 /* Initialize the vb2 queue */
1510 q = &gspca_dev->queue;
1511 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1512 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1513 q->drv_priv = gspca_dev;
1514 q->buf_struct_size = sizeof(struct gspca_buffer);
1515 q->ops = &gspca_qops;
1516 q->mem_ops = &vb2_vmalloc_memops;
1517 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1518 q->min_queued_buffers = 2;
1519 q->lock = &gspca_dev->usb_lock;
1520 ret = vb2_queue_init(q);
1521 if (ret)
1522 goto out;
1523 gspca_dev->vdev.queue = q;
1524
1525 INIT_LIST_HEAD(&gspca_dev->buf_list);
1526 spin_lock_init(&gspca_dev->qlock);
1527
1528 /* configure the subdriver and initialize the USB device */
1529 ret = sd_desc->config(gspca_dev, id);
1530 if (ret < 0)
1531 goto out;
1532 ret = sd_desc->init(gspca_dev);
1533 if (ret < 0)
1534 goto out;
1535 if (sd_desc->init_controls)
1536 ret = sd_desc->init_controls(gspca_dev);
1537 if (ret < 0)
1538 goto out;
1539 gspca_set_default_mode(gspca_dev);
1540
1541 ret = gspca_input_connect(gspca_dev);
1542 if (ret)
1543 goto out;
1544
1545 #ifdef CONFIG_VIDEO_ADV_DEBUG
1546 if (!gspca_dev->sd_desc->get_register)
1547 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
1548 if (!gspca_dev->sd_desc->set_register)
1549 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
1550 #endif
1551 if (!gspca_dev->sd_desc->get_jcomp)
1552 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
1553 if (!gspca_dev->sd_desc->set_jcomp)
1554 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
1555
1556 /* init video stuff */
1557 ret = video_register_device(&gspca_dev->vdev,
1558 VFL_TYPE_VIDEO,
1559 -1);
1560 if (ret < 0) {
1561 pr_err("video_register_device err %d\n", ret);
1562 goto out;
1563 }
1564
1565 usb_set_intfdata(intf, gspca_dev);
1566 gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
1567 video_device_node_name(&gspca_dev->vdev));
1568
1569 gspca_input_create_urb(gspca_dev);
1570
1571 return 0;
1572 out:
1573 #if IS_ENABLED(CONFIG_INPUT)
1574 if (gspca_dev->input_dev)
1575 input_unregister_device(gspca_dev->input_dev);
1576 #endif
1577 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1578 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1579 if (sd_desc->probe_error)
1580 sd_desc->probe_error(gspca_dev);
1581 kfree(gspca_dev->usb_buf);
1582 kfree(gspca_dev);
1583 return ret;
1584 }
1585 EXPORT_SYMBOL(gspca_dev_probe2);
1586
1587 /* same function as the previous one, but check the interface */
1588 int gspca_dev_probe(struct usb_interface *intf,
1589 const struct usb_device_id *id,
1590 const struct sd_desc *sd_desc,
1591 int dev_size,
1592 struct module *module)
1593 {
1594 struct usb_device *dev = interface_to_usbdev(intf);
1595
1596 /* we don't handle multi-config cameras */
1597 if (dev->descriptor.bNumConfigurations != 1) {
1598 pr_err("%04x:%04x too many config\n",
1599 id->idVendor, id->idProduct);
1600 return -ENODEV;
1601 }
1602
1603 /* the USB video interface must be the first one */
1604 if (dev->actconfig->desc.bNumInterfaces != 1
1605 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
1606 return -ENODEV;
1607
1608 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
1609 }
1610 EXPORT_SYMBOL(gspca_dev_probe);
1611
1612 /*
1613 * USB disconnection
1614 *
1615 * This function must be called by the sub-driver
1616 * when the device disconnects, after the specific resources are freed.
1617 */
1618 void gspca_disconnect(struct usb_interface *intf)
1619 {
1620 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1621 #if IS_ENABLED(CONFIG_INPUT)
1622 struct input_dev *input_dev;
1623 #endif
1624
1625 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
1626 video_device_node_name(&gspca_dev->vdev));
1627
1628 mutex_lock(&gspca_dev->usb_lock);
1629 gspca_dev->present = false;
1630 destroy_urbs(gspca_dev);
1631 gspca_input_destroy_urb(gspca_dev);
1632
1633 vb2_queue_error(&gspca_dev->queue);
1634
1635 #if IS_ENABLED(CONFIG_INPUT)
1636 input_dev = gspca_dev->input_dev;
1637 if (input_dev) {
1638 gspca_dev->input_dev = NULL;
1639 input_unregister_device(input_dev);
1640 }
1641 #endif
1642
1643 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
1644 video_unregister_device(&gspca_dev->vdev);
1645
1646 mutex_unlock(&gspca_dev->usb_lock);
1647
1648 /* (this will call gspca_release() immediately or on last close) */
1649 v4l2_device_put(&gspca_dev->v4l2_dev);
1650 }
1651 EXPORT_SYMBOL(gspca_disconnect);
1652
1653 #ifdef CONFIG_PM
1654 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1655 {
1656 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1657
1658 gspca_input_destroy_urb(gspca_dev);
1659
1660 if (!vb2_start_streaming_called(&gspca_dev->queue))
1661 return 0;
1662
1663 mutex_lock(&gspca_dev->usb_lock);
1664 gspca_dev->frozen = 1; /* avoid urb error messages */
1665 gspca_dev->usb_err = 0;
1666 if (gspca_dev->sd_desc->stopN)
1667 gspca_dev->sd_desc->stopN(gspca_dev);
1668 destroy_urbs(gspca_dev);
1669 gspca_set_alt0(gspca_dev);
1670 if (gspca_dev->sd_desc->stop0)
1671 gspca_dev->sd_desc->stop0(gspca_dev);
1672 mutex_unlock(&gspca_dev->usb_lock);
1673
1674 return 0;
1675 }
1676 EXPORT_SYMBOL(gspca_suspend);
1677
1678 int gspca_resume(struct usb_interface *intf)
1679 {
1680 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1681 int streaming, ret = 0;
1682
1683 mutex_lock(&gspca_dev->usb_lock);
1684 gspca_dev->frozen = 0;
1685 gspca_dev->usb_err = 0;
1686 gspca_dev->sd_desc->init(gspca_dev);
1687 /*
1688 * Most subdrivers send all ctrl values on sd_start and thus
1689 * only write to the device registers on s_ctrl when streaming ->
1690 * Clear streaming to avoid setting all ctrls twice.
1691 */
1692 streaming = vb2_start_streaming_called(&gspca_dev->queue);
1693 if (streaming)
1694 ret = gspca_init_transfer(gspca_dev);
1695 else
1696 gspca_input_create_urb(gspca_dev);
1697 mutex_unlock(&gspca_dev->usb_lock);
1698
1699 return ret;
1700 }
1701 EXPORT_SYMBOL(gspca_resume);
1702 #endif
1703
1704 /* -- module insert / remove -- */
1705 static int __init gspca_init(void)
1706 {
1707 pr_info("v" GSPCA_VERSION " registered\n");
1708 return 0;
1709 }
1710 static void __exit gspca_exit(void)
1711 {
1712 }
1713
1714 module_init(gspca_init);
1715 module_exit(gspca_exit);
1716
1717 module_param_named(debug, gspca_debug, int, 0644);
1718 MODULE_PARM_DESC(debug,
1719 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git