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Linux 4.19.133
[linux/fpc-iii.git] / drivers / media / usb / gspca / gspca.c
blobc9a2b29a60a57bd2e629436f41b3a78d42ddc829
1 /*
2 * Main USB camera driver
3 *
4 * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
5 *
6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * for more details.
18 */
19
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #define GSPCA_VERSION "2.14.0"
23
24 #include <linux/init.h>
25 #include <linux/fs.h>
26 #include <linux/vmalloc.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/mm.h>
30 #include <linux/string.h>
31 #include <linux/pagemap.h>
32 #include <linux/io.h>
33 #include <asm/page.h>
34 #include <linux/uaccess.h>
35 #include <linux/ktime.h>
36 #include <media/v4l2-ioctl.h>
37 #include <media/v4l2-ctrls.h>
38 #include <media/v4l2-fh.h>
39 #include <media/v4l2-event.h>
40
41 #include "gspca.h"
42
43 #if IS_ENABLED(CONFIG_INPUT)
44 #include <linux/input.h>
45 #include <linux/usb/input.h>
46 #endif
47
48 /* global values */
49 #define DEF_NURBS 3 /* default number of URBs */
50 #if DEF_NURBS > MAX_NURBS
51 #error "DEF_NURBS too big"
52 #endif
53
54 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
55 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56 MODULE_LICENSE("GPL");
57 MODULE_VERSION(GSPCA_VERSION);
58
59 int gspca_debug;
60 EXPORT_SYMBOL(gspca_debug);
61
62 static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
63 __u32 pixfmt, int w, int h)
64 {
65 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
66 gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n",
67 txt,
68 pixfmt & 0xff,
69 (pixfmt >> 8) & 0xff,
70 (pixfmt >> 16) & 0xff,
71 pixfmt >> 24,
72 w, h);
73 } else {
74 gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n",
75 txt,
76 pixfmt,
77 w, h);
78 }
79 }
80
81 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
82 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
83 #define GSPCA_MEMORY_READ 7
84
85 /*
86 * Input and interrupt endpoint handling functions
87 */
88 #if IS_ENABLED(CONFIG_INPUT)
89 static void int_irq(struct urb *urb)
90 {
91 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
92 int ret;
93
94 ret = urb->status;
95 switch (ret) {
96 case 0:
97 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
98 urb->transfer_buffer, urb->actual_length) < 0) {
99 gspca_err(gspca_dev, "Unknown packet received\n");
100 }
101 break;
102
103 case -ENOENT:
104 case -ECONNRESET:
105 case -ENODEV:
106 case -ESHUTDOWN:
107 /* Stop is requested either by software or hardware is gone,
108 * keep the ret value non-zero and don't resubmit later.
109 */
110 break;
111
112 default:
113 gspca_err(gspca_dev, "URB error %i, resubmitting\n",
114 urb->status);
115 urb->status = 0;
116 ret = 0;
117 }
118
119 if (ret == 0) {
120 ret = usb_submit_urb(urb, GFP_ATOMIC);
121 if (ret < 0)
122 pr_err("Resubmit URB failed with error %i\n", ret);
123 }
124 }
125
126 static int gspca_input_connect(struct gspca_dev *dev)
127 {
128 struct input_dev *input_dev;
129 int err = 0;
130
131 dev->input_dev = NULL;
132 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
133 input_dev = input_allocate_device();
134 if (!input_dev)
135 return -ENOMEM;
136
137 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
138 strlcat(dev->phys, "/input0", sizeof(dev->phys));
139
140 input_dev->name = dev->sd_desc->name;
141 input_dev->phys = dev->phys;
142
143 usb_to_input_id(dev->dev, &input_dev->id);
144
145 input_dev->evbit[0] = BIT_MASK(EV_KEY);
146 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
147 input_dev->dev.parent = &dev->dev->dev;
148
149 err = input_register_device(input_dev);
150 if (err) {
151 pr_err("Input device registration failed with error %i\n",
152 err);
153 input_dev->dev.parent = NULL;
154 input_free_device(input_dev);
155 } else {
156 dev->input_dev = input_dev;
157 }
158 }
159
160 return err;
161 }
162
163 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
164 struct usb_endpoint_descriptor *ep)
165 {
166 unsigned int buffer_len;
167 int interval;
168 struct urb *urb;
169 struct usb_device *dev;
170 void *buffer = NULL;
171 int ret = -EINVAL;
172
173 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
174 interval = ep->bInterval;
175 gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n",
176 ep->bEndpointAddress, buffer_len, interval);
177
178 dev = gspca_dev->dev;
179
180 urb = usb_alloc_urb(0, GFP_KERNEL);
181 if (!urb) {
182 ret = -ENOMEM;
183 goto error;
184 }
185
186 buffer = usb_alloc_coherent(dev, buffer_len,
187 GFP_KERNEL, &urb->transfer_dma);
188 if (!buffer) {
189 ret = -ENOMEM;
190 goto error_buffer;
191 }
192 usb_fill_int_urb(urb, dev,
193 usb_rcvintpipe(dev, ep->bEndpointAddress),
194 buffer, buffer_len,
195 int_irq, (void *)gspca_dev, interval);
196 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
197 ret = usb_submit_urb(urb, GFP_KERNEL);
198 if (ret < 0) {
199 gspca_err(gspca_dev, "submit int URB failed with error %i\n",
200 ret);
201 goto error_submit;
202 }
203 gspca_dev->int_urb = urb;
204 return ret;
205
206 error_submit:
207 usb_free_coherent(dev,
208 urb->transfer_buffer_length,
209 urb->transfer_buffer,
210 urb->transfer_dma);
211 error_buffer:
212 usb_free_urb(urb);
213 error:
214 return ret;
215 }
216
217 static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
218 {
219 struct usb_interface *intf;
220 struct usb_host_interface *intf_desc;
221 struct usb_endpoint_descriptor *ep;
222 int i;
223
224 if (gspca_dev->sd_desc->int_pkt_scan) {
225 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
226 intf_desc = intf->cur_altsetting;
227 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
228 ep = &intf_desc->endpoint[i].desc;
229 if (usb_endpoint_dir_in(ep) &&
230 usb_endpoint_xfer_int(ep)) {
231
232 alloc_and_submit_int_urb(gspca_dev, ep);
233 break;
234 }
235 }
236 }
237 }
238
239 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
240 {
241 struct urb *urb;
242
243 urb = gspca_dev->int_urb;
244 if (urb) {
245 gspca_dev->int_urb = NULL;
246 usb_kill_urb(urb);
247 usb_free_coherent(gspca_dev->dev,
248 urb->transfer_buffer_length,
249 urb->transfer_buffer,
250 urb->transfer_dma);
251 usb_free_urb(urb);
252 }
253 }
254 #else
255 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
256 {
257 }
258
259 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
260 {
261 }
262
263 static inline int gspca_input_connect(struct gspca_dev *dev)
264 {
265 return 0;
266 }
267 #endif
268
269 /*
270 * fill a video frame from an URB and resubmit
271 */
272 static void fill_frame(struct gspca_dev *gspca_dev,
273 struct urb *urb)
274 {
275 u8 *data; /* address of data in the iso message */
276 int i, len, st;
277 cam_pkt_op pkt_scan;
278
279 if (urb->status != 0) {
280 if (urb->status == -ESHUTDOWN)
281 return; /* disconnection */
282 #ifdef CONFIG_PM
283 if (gspca_dev->frozen)
284 return;
285 #endif
286 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
287 urb->status = 0;
288 goto resubmit;
289 }
290 pkt_scan = gspca_dev->sd_desc->pkt_scan;
291 for (i = 0; i < urb->number_of_packets; i++) {
292 len = urb->iso_frame_desc[i].actual_length;
293
294 /* check the packet status and length */
295 st = urb->iso_frame_desc[i].status;
296 if (st) {
297 gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n",
298 i, len, st);
299 gspca_dev->last_packet_type = DISCARD_PACKET;
300 continue;
301 }
302 if (len == 0) {
303 if (gspca_dev->empty_packet == 0)
304 gspca_dev->empty_packet = 1;
305 continue;
306 }
307
308 /* let the packet be analyzed by the subdriver */
309 gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n",
310 i, urb->iso_frame_desc[i].offset, len);
311 data = (u8 *) urb->transfer_buffer
312 + urb->iso_frame_desc[i].offset;
313 pkt_scan(gspca_dev, data, len);
314 }
315
316 resubmit:
317 if (!gspca_dev->streaming)
318 return;
319 /* resubmit the URB */
320 st = usb_submit_urb(urb, GFP_ATOMIC);
321 if (st < 0)
322 pr_err("usb_submit_urb() ret %d\n", st);
323 }
324
325 /*
326 * ISOC message interrupt from the USB device
327 *
328 * Analyse each packet and call the subdriver for copy to the frame buffer.
329 */
330 static void isoc_irq(struct urb *urb)
331 {
332 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
333
334 gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
335 if (!gspca_dev->streaming)
336 return;
337 fill_frame(gspca_dev, urb);
338 }
339
340 /*
341 * bulk message interrupt from the USB device
342 */
343 static void bulk_irq(struct urb *urb)
344 {
345 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
346 int st;
347
348 gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
349 if (!gspca_dev->streaming)
350 return;
351 switch (urb->status) {
352 case 0:
353 break;
354 case -ESHUTDOWN:
355 return; /* disconnection */
356 default:
357 #ifdef CONFIG_PM
358 if (gspca_dev->frozen)
359 return;
360 #endif
361 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
362 urb->status = 0;
363 goto resubmit;
364 }
365
366 gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length);
367 gspca_dev->sd_desc->pkt_scan(gspca_dev,
368 urb->transfer_buffer,
369 urb->actual_length);
370
371 resubmit:
372 if (!gspca_dev->streaming)
373 return;
374 /* resubmit the URB */
375 if (gspca_dev->cam.bulk_nurbs != 0) {
376 st = usb_submit_urb(urb, GFP_ATOMIC);
377 if (st < 0)
378 pr_err("usb_submit_urb() ret %d\n", st);
379 }
380 }
381
382 /*
383 * add data to the current frame
384 *
385 * This function is called by the subdrivers at interrupt level.
386 *
387 * To build a frame, these ones must add
388 * - one FIRST_PACKET
389 * - 0 or many INTER_PACKETs
390 * - one LAST_PACKET
391 * DISCARD_PACKET invalidates the whole frame.
392 */
393 void gspca_frame_add(struct gspca_dev *gspca_dev,
394 enum gspca_packet_type packet_type,
395 const u8 *data,
396 int len)
397 {
398 struct gspca_buffer *buf;
399 unsigned long flags;
400
401 gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len);
402
403 spin_lock_irqsave(&gspca_dev->qlock, flags);
404 buf = list_first_entry_or_null(&gspca_dev->buf_list,
405 typeof(*buf), list);
406 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
407
408 if (packet_type == FIRST_PACKET) {
409 /* if there is no queued buffer, discard the whole frame */
410 if (!buf) {
411 gspca_dev->last_packet_type = DISCARD_PACKET;
412 gspca_dev->sequence++;
413 return;
414 }
415 gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
416 gspca_dev->image_len = 0;
417 } else {
418 switch (gspca_dev->last_packet_type) {
419 case DISCARD_PACKET:
420 if (packet_type == LAST_PACKET) {
421 gspca_dev->last_packet_type = packet_type;
422 gspca_dev->image = NULL;
423 gspca_dev->image_len = 0;
424 }
425 return;
426 case LAST_PACKET:
427 return;
428 }
429 }
430
431 /* append the packet to the frame buffer */
432 if (len > 0) {
433 if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) {
434 gspca_err(gspca_dev, "frame overflow %d > %d\n",
435 gspca_dev->image_len + len,
436 PAGE_ALIGN(gspca_dev->pixfmt.sizeimage));
437 packet_type = DISCARD_PACKET;
438 } else {
439 /* !! image is NULL only when last pkt is LAST or DISCARD
440 if (gspca_dev->image == NULL) {
441 pr_err("gspca_frame_add() image == NULL\n");
442 return;
443 }
444 */
445 memcpy(gspca_dev->image + gspca_dev->image_len,
446 data, len);
447 gspca_dev->image_len += len;
448 }
449 }
450 gspca_dev->last_packet_type = packet_type;
451
452 /* if last packet, invalidate packet concatenation until
453 * next first packet, wake up the application and advance
454 * in the queue */
455 if (packet_type == LAST_PACKET) {
456 spin_lock_irqsave(&gspca_dev->qlock, flags);
457 list_del(&buf->list);
458 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
459 buf->vb.vb2_buf.timestamp = ktime_get_ns();
460 vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
461 gspca_dev->image_len);
462 buf->vb.sequence = gspca_dev->sequence++;
463 buf->vb.field = V4L2_FIELD_NONE;
464 gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n",
465 gspca_dev->image_len);
466 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
467 gspca_dev->image = NULL;
468 gspca_dev->image_len = 0;
469 }
470 }
471 EXPORT_SYMBOL(gspca_frame_add);
472
473 static void destroy_urbs(struct gspca_dev *gspca_dev)
474 {
475 struct urb *urb;
476 unsigned int i;
477
478 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
479
480 /* Killing all URBs guarantee that no URB completion
481 * handler is running. Therefore, there shouldn't
482 * be anyone trying to access gspca_dev->urb[i]
483 */
484 for (i = 0; i < MAX_NURBS; i++)
485 usb_kill_urb(gspca_dev->urb[i]);
486
487 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
488 for (i = 0; i < MAX_NURBS; i++) {
489 urb = gspca_dev->urb[i];
490 if (!urb)
491 continue;
492 gspca_dev->urb[i] = NULL;
493 usb_free_coherent(gspca_dev->dev,
494 urb->transfer_buffer_length,
495 urb->transfer_buffer,
496 urb->transfer_dma);
497 usb_free_urb(urb);
498 }
499 }
500
501 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
502 {
503 int ret;
504
505 if (gspca_dev->alt == 0)
506 return 0;
507 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
508 if (ret < 0)
509 pr_err("set alt 0 err %d\n", ret);
510 return ret;
511 }
512
513 /*
514 * look for an input transfer endpoint in an alternate setting.
515 *
516 * If xfer_ep is invalid, return the first valid ep found, otherwise
517 * look for exactly the ep with address equal to xfer_ep.
518 */
519 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
520 int xfer, int xfer_ep)
521 {
522 struct usb_host_endpoint *ep;
523 int i, attr;
524
525 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
526 ep = &alt->endpoint[i];
527 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
528 if (attr == xfer
529 && ep->desc.wMaxPacketSize != 0
530 && usb_endpoint_dir_in(&ep->desc)
531 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
532 return ep;
533 }
534 return NULL;
535 }
536
537 /* compute the minimum bandwidth for the current transfer */
538 static u32 which_bandwidth(struct gspca_dev *gspca_dev)
539 {
540 u32 bandwidth;
541
542 /* get the (max) image size */
543 bandwidth = gspca_dev->pixfmt.sizeimage;
544
545 /* if the image is compressed, estimate its mean size */
546 if (!gspca_dev->cam.needs_full_bandwidth &&
547 bandwidth < gspca_dev->pixfmt.width *
548 gspca_dev->pixfmt.height)
549 bandwidth = bandwidth * 3 / 8; /* 0.375 */
550
551 /* estimate the frame rate */
552 if (gspca_dev->sd_desc->get_streamparm) {
553 struct v4l2_streamparm parm;
554
555 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
556 bandwidth *= parm.parm.capture.timeperframe.denominator;
557 bandwidth /= parm.parm.capture.timeperframe.numerator;
558 } else {
559
560 /* don't hope more than 15 fps with USB 1.1 and
561 * image resolution >= 640x480 */
562 if (gspca_dev->pixfmt.width >= 640
563 && gspca_dev->dev->speed == USB_SPEED_FULL)
564 bandwidth *= 15; /* 15 fps */
565 else
566 bandwidth *= 30; /* 30 fps */
567 }
568
569 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
570 return bandwidth;
571 }
572
573 /* endpoint table */
574 #define MAX_ALT 16
575 struct ep_tb_s {
576 u32 alt;
577 u32 bandwidth;
578 };
579
580 /*
581 * build the table of the endpoints
582 * and compute the minimum bandwidth for the image transfer
583 */
584 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
585 struct usb_interface *intf,
586 struct ep_tb_s *ep_tb)
587 {
588 struct usb_host_endpoint *ep;
589 int i, j, nbalt, psize, found;
590 u32 bandwidth, last_bw;
591
592 nbalt = intf->num_altsetting;
593 if (nbalt > MAX_ALT)
594 nbalt = MAX_ALT; /* fixme: should warn */
595
596 /* build the endpoint table */
597 i = 0;
598 last_bw = 0;
599 for (;;) {
600 ep_tb->bandwidth = 2000 * 2000 * 120;
601 found = 0;
602 for (j = 0; j < nbalt; j++) {
603 ep = alt_xfer(&intf->altsetting[j],
604 USB_ENDPOINT_XFER_ISOC,
605 gspca_dev->xfer_ep);
606 if (ep == NULL)
607 continue;
608 if (ep->desc.bInterval == 0) {
609 pr_err("alt %d iso endp with 0 interval\n", j);
610 continue;
611 }
612 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
613 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
614 bandwidth = psize * 1000;
615 if (gspca_dev->dev->speed == USB_SPEED_HIGH
616 || gspca_dev->dev->speed >= USB_SPEED_SUPER)
617 bandwidth *= 8;
618 bandwidth /= 1 << (ep->desc.bInterval - 1);
619 if (bandwidth <= last_bw)
620 continue;
621 if (bandwidth < ep_tb->bandwidth) {
622 ep_tb->bandwidth = bandwidth;
623 ep_tb->alt = j;
624 found = 1;
625 }
626 }
627 if (!found)
628 break;
629 gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n",
630 ep_tb->alt, ep_tb->bandwidth);
631 last_bw = ep_tb->bandwidth;
632 i++;
633 ep_tb++;
634 }
635
636 /*
637 * If the camera:
638 * has a usb audio class interface (a built in usb mic); and
639 * is a usb 1 full speed device; and
640 * uses the max full speed iso bandwidth; and
641 * and has more than 1 alt setting
642 * then skip the highest alt setting to spare bandwidth for the mic
643 */
644 if (gspca_dev->audio &&
645 gspca_dev->dev->speed == USB_SPEED_FULL &&
646 last_bw >= 1000000 &&
647 i > 1) {
648 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
649 i--;
650 ep_tb--;
651 }
652
653 /* get the requested bandwidth and start at the highest atlsetting */
654 bandwidth = which_bandwidth(gspca_dev);
655 ep_tb--;
656 while (i > 1) {
657 ep_tb--;
658 if (ep_tb->bandwidth < bandwidth)
659 break;
660 i--;
661 }
662 return i;
663 }
664
665 /*
666 * create the URBs for image transfer
667 */
668 static int create_urbs(struct gspca_dev *gspca_dev,
669 struct usb_host_endpoint *ep)
670 {
671 struct urb *urb;
672 int n, nurbs, i, psize, npkt, bsize;
673
674 /* calculate the packet size and the number of packets */
675 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
676
677 if (!gspca_dev->cam.bulk) { /* isoc */
678
679 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
680 if (gspca_dev->pkt_size == 0)
681 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
682 else
683 psize = gspca_dev->pkt_size;
684 npkt = gspca_dev->cam.npkt;
685 if (npkt == 0)
686 npkt = 32; /* default value */
687 bsize = psize * npkt;
688 gspca_dbg(gspca_dev, D_STREAM,
689 "isoc %d pkts size %d = bsize:%d\n",
690 npkt, psize, bsize);
691 nurbs = DEF_NURBS;
692 } else { /* bulk */
693 npkt = 0;
694 bsize = gspca_dev->cam.bulk_size;
695 if (bsize == 0)
696 bsize = psize;
697 gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize);
698 if (gspca_dev->cam.bulk_nurbs != 0)
699 nurbs = gspca_dev->cam.bulk_nurbs;
700 else
701 nurbs = 1;
702 }
703
704 for (n = 0; n < nurbs; n++) {
705 urb = usb_alloc_urb(npkt, GFP_KERNEL);
706 if (!urb)
707 return -ENOMEM;
708 gspca_dev->urb[n] = urb;
709 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
710 bsize,
711 GFP_KERNEL,
712 &urb->transfer_dma);
713
714 if (urb->transfer_buffer == NULL) {
715 pr_err("usb_alloc_coherent failed\n");
716 return -ENOMEM;
717 }
718 urb->dev = gspca_dev->dev;
719 urb->context = gspca_dev;
720 urb->transfer_buffer_length = bsize;
721 if (npkt != 0) { /* ISOC */
722 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
723 ep->desc.bEndpointAddress);
724 urb->transfer_flags = URB_ISO_ASAP
725 | URB_NO_TRANSFER_DMA_MAP;
726 urb->interval = 1 << (ep->desc.bInterval - 1);
727 urb->complete = isoc_irq;
728 urb->number_of_packets = npkt;
729 for (i = 0; i < npkt; i++) {
730 urb->iso_frame_desc[i].length = psize;
731 urb->iso_frame_desc[i].offset = psize * i;
732 }
733 } else { /* bulk */
734 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
735 ep->desc.bEndpointAddress);
736 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
737 urb->complete = bulk_irq;
738 }
739 }
740 return 0;
741 }
742
743 /* Note: both the queue and the usb locks should be held when calling this */
744 static void gspca_stream_off(struct gspca_dev *gspca_dev)
745 {
746 gspca_dev->streaming = false;
747 gspca_dev->usb_err = 0;
748 if (gspca_dev->sd_desc->stopN)
749 gspca_dev->sd_desc->stopN(gspca_dev);
750 destroy_urbs(gspca_dev);
751 gspca_input_destroy_urb(gspca_dev);
752 gspca_set_alt0(gspca_dev);
753 if (gspca_dev->present)
754 gspca_input_create_urb(gspca_dev);
755 if (gspca_dev->sd_desc->stop0)
756 gspca_dev->sd_desc->stop0(gspca_dev);
757 gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n");
758 }
759
760 /*
761 * start the USB transfer
762 */
763 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
764 {
765 struct usb_interface *intf;
766 struct usb_host_endpoint *ep;
767 struct urb *urb;
768 struct ep_tb_s ep_tb[MAX_ALT];
769 int n, ret, xfer, alt, alt_idx;
770
771 /* reset the streaming variables */
772 gspca_dev->image = NULL;
773 gspca_dev->image_len = 0;
774 gspca_dev->last_packet_type = DISCARD_PACKET;
775
776 gspca_dev->usb_err = 0;
777
778 /* do the specific subdriver stuff before endpoint selection */
779 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
780 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
781 if (gspca_dev->sd_desc->isoc_init) {
782 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
783 if (ret < 0)
784 return ret;
785 }
786 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
787 : USB_ENDPOINT_XFER_ISOC;
788
789 /* if bulk or the subdriver forced an altsetting, get the endpoint */
790 if (gspca_dev->alt != 0) {
791 gspca_dev->alt--; /* (previous version compatibility) */
792 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
793 gspca_dev->xfer_ep);
794 if (ep == NULL) {
795 pr_err("bad altsetting %d\n", gspca_dev->alt);
796 return -EIO;
797 }
798 ep_tb[0].alt = gspca_dev->alt;
799 alt_idx = 1;
800 } else {
801 /* else, compute the minimum bandwidth
802 * and build the endpoint table */
803 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
804 if (alt_idx <= 0) {
805 pr_err("no transfer endpoint found\n");
806 return -EIO;
807 }
808 }
809
810 /* set the highest alternate setting and
811 * loop until urb submit succeeds */
812 gspca_input_destroy_urb(gspca_dev);
813
814 gspca_dev->alt = ep_tb[--alt_idx].alt;
815 alt = -1;
816 for (;;) {
817 if (alt != gspca_dev->alt) {
818 alt = gspca_dev->alt;
819 if (intf->num_altsetting > 1) {
820 ret = usb_set_interface(gspca_dev->dev,
821 gspca_dev->iface,
822 alt);
823 if (ret < 0) {
824 if (ret == -ENOSPC)
825 goto retry; /*fixme: ugly*/
826 pr_err("set alt %d err %d\n", alt, ret);
827 goto out;
828 }
829 }
830 }
831 if (!gspca_dev->cam.no_urb_create) {
832 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
833 alt);
834 ret = create_urbs(gspca_dev,
835 alt_xfer(&intf->altsetting[alt], xfer,
836 gspca_dev->xfer_ep));
837 if (ret < 0) {
838 destroy_urbs(gspca_dev);
839 goto out;
840 }
841 }
842
843 /* clear the bulk endpoint */
844 if (gspca_dev->cam.bulk)
845 usb_clear_halt(gspca_dev->dev,
846 gspca_dev->urb[0]->pipe);
847
848 /* start the cam */
849 ret = gspca_dev->sd_desc->start(gspca_dev);
850 if (ret < 0) {
851 destroy_urbs(gspca_dev);
852 goto out;
853 }
854 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
855 gspca_dev->streaming = true;
856
857 /* some bulk transfers are started by the subdriver */
858 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
859 break;
860
861 /* submit the URBs */
862 for (n = 0; n < MAX_NURBS; n++) {
863 urb = gspca_dev->urb[n];
864 if (urb == NULL)
865 break;
866 ret = usb_submit_urb(urb, GFP_KERNEL);
867 if (ret < 0)
868 break;
869 }
870 if (ret >= 0)
871 break; /* transfer is started */
872
873 /* something when wrong
874 * stop the webcam and free the transfer resources */
875 gspca_stream_off(gspca_dev);
876 if (ret != -ENOSPC) {
877 pr_err("usb_submit_urb alt %d err %d\n",
878 gspca_dev->alt, ret);
879 goto out;
880 }
881
882 /* the bandwidth is not wide enough
883 * negotiate or try a lower alternate setting */
884 retry:
885 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
886 alt);
887 msleep(20); /* wait for kill complete */
888 if (gspca_dev->sd_desc->isoc_nego) {
889 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
890 if (ret < 0)
891 goto out;
892 } else {
893 if (alt_idx <= 0) {
894 pr_err("no transfer endpoint found\n");
895 ret = -EIO;
896 goto out;
897 }
898 gspca_dev->alt = ep_tb[--alt_idx].alt;
899 }
900 }
901 out:
902 gspca_input_create_urb(gspca_dev);
903 return ret;
904 }
905
906 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
907 {
908 int i;
909
910 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
911 gspca_dev->curr_mode = i;
912 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
913
914 /* does nothing if ctrl_handler == NULL */
915 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
916 }
917
918 static int wxh_to_mode(struct gspca_dev *gspca_dev,
919 int width, int height)
920 {
921 int i;
922
923 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
924 if (width == gspca_dev->cam.cam_mode[i].width
925 && height == gspca_dev->cam.cam_mode[i].height)
926 return i;
927 }
928 return -EINVAL;
929 }
930
931 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
932 int width, int height)
933 {
934 int 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 if (gspca_dev->cam.cam_mode[i].sizeimage <
1030 gspca_dev->cam.cam_mode[i].width *
1031 gspca_dev->cam.cam_mode[i].height)
1032 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1033 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1034 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1035 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1036 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1037 fmtdesc->description[4] = '\0';
1038 return 0;
1039 }
1040
1041 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1042 struct v4l2_format *fmt)
1043 {
1044 struct gspca_dev *gspca_dev = video_drvdata(file);
1045
1046 fmt->fmt.pix = gspca_dev->pixfmt;
1047 /* some drivers use priv internally, zero it before giving it back to
1048 the core */
1049 fmt->fmt.pix.priv = 0;
1050 return 0;
1051 }
1052
1053 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1054 struct v4l2_format *fmt)
1055 {
1056 int w, h, mode, mode2;
1057
1058 w = fmt->fmt.pix.width;
1059 h = fmt->fmt.pix.height;
1060
1061 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1062 fmt->fmt.pix.pixelformat, w, h);
1063
1064 /* search the nearest mode for width and height */
1065 mode = wxh_to_nearest_mode(gspca_dev, w, h);
1066
1067 /* OK if right palette */
1068 if (gspca_dev->cam.cam_mode[mode].pixelformat
1069 != fmt->fmt.pix.pixelformat) {
1070
1071 /* else, search the closest mode with the same pixel format */
1072 mode2 = gspca_get_mode(gspca_dev, mode,
1073 fmt->fmt.pix.pixelformat);
1074 if (mode2 >= 0)
1075 mode = mode2;
1076 }
1077 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1078 if (gspca_dev->sd_desc->try_fmt) {
1079 /* pass original resolution to subdriver try_fmt */
1080 fmt->fmt.pix.width = w;
1081 fmt->fmt.pix.height = h;
1082 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1083 }
1084 /* some drivers use priv internally, zero it before giving it back to
1085 the core */
1086 fmt->fmt.pix.priv = 0;
1087 return mode; /* used when s_fmt */
1088 }
1089
1090 static int vidioc_try_fmt_vid_cap(struct file *file,
1091 void *priv,
1092 struct v4l2_format *fmt)
1093 {
1094 struct gspca_dev *gspca_dev = video_drvdata(file);
1095
1096 if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
1097 return -EINVAL;
1098 return 0;
1099 }
1100
1101 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1102 struct v4l2_format *fmt)
1103 {
1104 struct gspca_dev *gspca_dev = video_drvdata(file);
1105 int mode;
1106
1107 if (vb2_is_busy(&gspca_dev->queue))
1108 return -EBUSY;
1109
1110 mode = try_fmt_vid_cap(gspca_dev, fmt);
1111 if (mode < 0)
1112 return -EINVAL;
1113
1114 gspca_dev->curr_mode = mode;
1115 if (gspca_dev->sd_desc->try_fmt)
1116 /* subdriver try_fmt can modify format parameters */
1117 gspca_dev->pixfmt = fmt->fmt.pix;
1118 else
1119 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1120 return 0;
1121 }
1122
1123 static int vidioc_enum_framesizes(struct file *file, void *priv,
1124 struct v4l2_frmsizeenum *fsize)
1125 {
1126 struct gspca_dev *gspca_dev = video_drvdata(file);
1127 int i;
1128 __u32 index = 0;
1129
1130 if (gspca_dev->sd_desc->enum_framesizes)
1131 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1132
1133 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1134 if (fsize->pixel_format !=
1135 gspca_dev->cam.cam_mode[i].pixelformat)
1136 continue;
1137
1138 if (fsize->index == index) {
1139 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1140 fsize->discrete.width =
1141 gspca_dev->cam.cam_mode[i].width;
1142 fsize->discrete.height =
1143 gspca_dev->cam.cam_mode[i].height;
1144 return 0;
1145 }
1146 index++;
1147 }
1148
1149 return -EINVAL;
1150 }
1151
1152 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1153 struct v4l2_frmivalenum *fival)
1154 {
1155 struct gspca_dev *gspca_dev = video_drvdata(filp);
1156 int mode;
1157 __u32 i;
1158
1159 mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1160 if (mode < 0)
1161 return -EINVAL;
1162
1163 if (gspca_dev->cam.mode_framerates == NULL ||
1164 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1165 return -EINVAL;
1166
1167 if (fival->pixel_format !=
1168 gspca_dev->cam.cam_mode[mode].pixelformat)
1169 return -EINVAL;
1170
1171 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1172 if (fival->index == i) {
1173 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1174 fival->discrete.numerator = 1;
1175 fival->discrete.denominator =
1176 gspca_dev->cam.mode_framerates[mode].rates[i];
1177 return 0;
1178 }
1179 }
1180
1181 return -EINVAL;
1182 }
1183
1184 static void gspca_release(struct v4l2_device *v4l2_device)
1185 {
1186 struct gspca_dev *gspca_dev =
1187 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1188
1189 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1190 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1191 kfree(gspca_dev->usb_buf);
1192 kfree(gspca_dev);
1193 }
1194
1195 static int vidioc_querycap(struct file *file, void *priv,
1196 struct v4l2_capability *cap)
1197 {
1198 struct gspca_dev *gspca_dev = video_drvdata(file);
1199
1200 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
1201 sizeof cap->driver);
1202 if (gspca_dev->dev->product != NULL) {
1203 strlcpy((char *) cap->card, gspca_dev->dev->product,
1204 sizeof cap->card);
1205 } else {
1206 snprintf((char *) cap->card, sizeof cap->card,
1207 "USB Camera (%04x:%04x)",
1208 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1209 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1210 }
1211 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1212 sizeof(cap->bus_info));
1213 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1214 | V4L2_CAP_STREAMING
1215 | V4L2_CAP_READWRITE;
1216 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1217 return 0;
1218 }
1219
1220 static int vidioc_enum_input(struct file *file, void *priv,
1221 struct v4l2_input *input)
1222 {
1223 struct gspca_dev *gspca_dev = video_drvdata(file);
1224
1225 if (input->index != 0)
1226 return -EINVAL;
1227 input->type = V4L2_INPUT_TYPE_CAMERA;
1228 input->status = gspca_dev->cam.input_flags;
1229 strlcpy(input->name, gspca_dev->sd_desc->name,
1230 sizeof input->name);
1231 return 0;
1232 }
1233
1234 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1235 {
1236 *i = 0;
1237 return 0;
1238 }
1239
1240 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1241 {
1242 if (i > 0)
1243 return -EINVAL;
1244 return 0;
1245 }
1246
1247 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1248 struct v4l2_jpegcompression *jpegcomp)
1249 {
1250 struct gspca_dev *gspca_dev = video_drvdata(file);
1251
1252 gspca_dev->usb_err = 0;
1253 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1254 }
1255
1256 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1257 const struct v4l2_jpegcompression *jpegcomp)
1258 {
1259 struct gspca_dev *gspca_dev = video_drvdata(file);
1260
1261 gspca_dev->usb_err = 0;
1262 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1263 }
1264
1265 static int vidioc_g_parm(struct file *filp, void *priv,
1266 struct v4l2_streamparm *parm)
1267 {
1268 struct gspca_dev *gspca_dev = video_drvdata(filp);
1269
1270 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1271
1272 if (!gspca_dev->sd_desc->get_streamparm)
1273 return 0;
1274
1275 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1276 gspca_dev->usb_err = 0;
1277 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1278 return gspca_dev->usb_err;
1279 }
1280
1281 static int vidioc_s_parm(struct file *filp, void *priv,
1282 struct v4l2_streamparm *parm)
1283 {
1284 struct gspca_dev *gspca_dev = video_drvdata(filp);
1285
1286 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1287
1288 if (!gspca_dev->sd_desc->set_streamparm) {
1289 parm->parm.capture.capability = 0;
1290 return 0;
1291 }
1292
1293 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1294 gspca_dev->usb_err = 0;
1295 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1296 return gspca_dev->usb_err;
1297 }
1298
1299 static int gspca_queue_setup(struct vb2_queue *vq,
1300 unsigned int *nbuffers, unsigned int *nplanes,
1301 unsigned int sizes[], struct device *alloc_devs[])
1302 {
1303 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1304 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1305
1306 if (*nplanes)
1307 return sizes[0] < size ? -EINVAL : 0;
1308 *nplanes = 1;
1309 sizes[0] = size;
1310 return 0;
1311 }
1312
1313 static int gspca_buffer_prepare(struct vb2_buffer *vb)
1314 {
1315 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1316 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1317
1318 if (vb2_plane_size(vb, 0) < size) {
1319 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
1320 vb2_plane_size(vb, 0), size);
1321 return -EINVAL;
1322 }
1323 return 0;
1324 }
1325
1326 static void gspca_buffer_finish(struct vb2_buffer *vb)
1327 {
1328 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1329
1330 if (!gspca_dev->sd_desc->dq_callback)
1331 return;
1332
1333 gspca_dev->usb_err = 0;
1334 if (gspca_dev->present)
1335 gspca_dev->sd_desc->dq_callback(gspca_dev);
1336 }
1337
1338 static void gspca_buffer_queue(struct vb2_buffer *vb)
1339 {
1340 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1341 struct gspca_buffer *buf = to_gspca_buffer(vb);
1342 unsigned long flags;
1343
1344 spin_lock_irqsave(&gspca_dev->qlock, flags);
1345 list_add_tail(&buf->list, &gspca_dev->buf_list);
1346 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1347 }
1348
1349 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
1350 enum vb2_buffer_state state)
1351 {
1352 struct gspca_buffer *buf, *node;
1353 unsigned long flags;
1354
1355 spin_lock_irqsave(&gspca_dev->qlock, flags);
1356 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
1357 vb2_buffer_done(&buf->vb.vb2_buf, state);
1358 list_del(&buf->list);
1359 }
1360 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1361 }
1362
1363 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
1364 {
1365 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1366 int ret;
1367
1368 gspca_dev->sequence = 0;
1369
1370 ret = gspca_init_transfer(gspca_dev);
1371 if (ret)
1372 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
1373 return ret;
1374 }
1375
1376 static void gspca_stop_streaming(struct vb2_queue *vq)
1377 {
1378 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1379
1380 gspca_stream_off(gspca_dev);
1381
1382 /* Release all active buffers */
1383 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
1384 }
1385
1386 static const struct vb2_ops gspca_qops = {
1387 .queue_setup = gspca_queue_setup,
1388 .buf_prepare = gspca_buffer_prepare,
1389 .buf_finish = gspca_buffer_finish,
1390 .buf_queue = gspca_buffer_queue,
1391 .start_streaming = gspca_start_streaming,
1392 .stop_streaming = gspca_stop_streaming,
1393 .wait_prepare = vb2_ops_wait_prepare,
1394 .wait_finish = vb2_ops_wait_finish,
1395 };
1396
1397 static const struct v4l2_file_operations dev_fops = {
1398 .owner = THIS_MODULE,
1399 .open = v4l2_fh_open,
1400 .release = vb2_fop_release,
1401 .unlocked_ioctl = video_ioctl2,
1402 .read = vb2_fop_read,
1403 .mmap = vb2_fop_mmap,
1404 .poll = vb2_fop_poll,
1405 };
1406
1407 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1408 .vidioc_querycap = vidioc_querycap,
1409 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1410 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1411 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1412 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1413 .vidioc_enum_input = vidioc_enum_input,
1414 .vidioc_g_input = vidioc_g_input,
1415 .vidioc_s_input = vidioc_s_input,
1416 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1417 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1418 .vidioc_g_parm = vidioc_g_parm,
1419 .vidioc_s_parm = vidioc_s_parm,
1420 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1421 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1422
1423 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1424 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1425 .vidioc_querybuf = vb2_ioctl_querybuf,
1426 .vidioc_qbuf = vb2_ioctl_qbuf,
1427 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1428 .vidioc_expbuf = vb2_ioctl_expbuf,
1429 .vidioc_streamon = vb2_ioctl_streamon,
1430 .vidioc_streamoff = vb2_ioctl_streamoff,
1431
1432 #ifdef CONFIG_VIDEO_ADV_DEBUG
1433 .vidioc_g_chip_info = vidioc_g_chip_info,
1434 .vidioc_g_register = vidioc_g_register,
1435 .vidioc_s_register = vidioc_s_register,
1436 #endif
1437 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1438 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1439 };
1440
1441 static const struct video_device gspca_template = {
1442 .name = "gspca main driver",
1443 .fops = &dev_fops,
1444 .ioctl_ops = &dev_ioctl_ops,
1445 .release = video_device_release_empty, /* We use v4l2_dev.release */
1446 };
1447
1448 /*
1449 * probe and create a new gspca device
1450 *
1451 * This function must be called by the sub-driver when it is
1452 * called for probing a new device.
1453 */
1454 int gspca_dev_probe2(struct usb_interface *intf,
1455 const struct usb_device_id *id,
1456 const struct sd_desc *sd_desc,
1457 int dev_size,
1458 struct module *module)
1459 {
1460 struct gspca_dev *gspca_dev;
1461 struct usb_device *dev = interface_to_usbdev(intf);
1462 struct vb2_queue *q;
1463 int ret;
1464
1465 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
1466 sd_desc->name, id->idVendor, id->idProduct);
1467
1468 /* create the device */
1469 if (dev_size < sizeof *gspca_dev)
1470 dev_size = sizeof *gspca_dev;
1471 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
1472 if (!gspca_dev) {
1473 pr_err("couldn't kzalloc gspca struct\n");
1474 return -ENOMEM;
1475 }
1476 gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL);
1477 if (!gspca_dev->usb_buf) {
1478 pr_err("out of memory\n");
1479 ret = -ENOMEM;
1480 goto out;
1481 }
1482 gspca_dev->dev = dev;
1483 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
1484 gspca_dev->xfer_ep = -1;
1485
1486 /* check if any audio device */
1487 if (dev->actconfig->desc.bNumInterfaces != 1) {
1488 int i;
1489 struct usb_interface *intf2;
1490
1491 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
1492 intf2 = dev->actconfig->interface[i];
1493 if (intf2 != NULL
1494 && intf2->altsetting != NULL
1495 && intf2->altsetting->desc.bInterfaceClass ==
1496 USB_CLASS_AUDIO) {
1497 gspca_dev->audio = 1;
1498 break;
1499 }
1500 }
1501 }
1502
1503 gspca_dev->v4l2_dev.release = gspca_release;
1504 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
1505 if (ret)
1506 goto out;
1507 gspca_dev->present = true;
1508 gspca_dev->sd_desc = sd_desc;
1509 gspca_dev->empty_packet = -1; /* don't check the empty packets */
1510 gspca_dev->vdev = gspca_template;
1511 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1512 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
1513 gspca_dev->module = module;
1514
1515 mutex_init(&gspca_dev->usb_lock);
1516 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
1517 init_waitqueue_head(&gspca_dev->wq);
1518
1519 /* Initialize the vb2 queue */
1520 q = &gspca_dev->queue;
1521 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1522 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1523 q->drv_priv = gspca_dev;
1524 q->buf_struct_size = sizeof(struct gspca_buffer);
1525 q->ops = &gspca_qops;
1526 q->mem_ops = &vb2_vmalloc_memops;
1527 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1528 q->min_buffers_needed = 2;
1529 q->lock = &gspca_dev->usb_lock;
1530 ret = vb2_queue_init(q);
1531 if (ret)
1532 goto out;
1533 gspca_dev->vdev.queue = q;
1534
1535 INIT_LIST_HEAD(&gspca_dev->buf_list);
1536 spin_lock_init(&gspca_dev->qlock);
1537
1538 /* configure the subdriver and initialize the USB device */
1539 ret = sd_desc->config(gspca_dev, id);
1540 if (ret < 0)
1541 goto out;
1542 ret = sd_desc->init(gspca_dev);
1543 if (ret < 0)
1544 goto out;
1545 if (sd_desc->init_controls)
1546 ret = sd_desc->init_controls(gspca_dev);
1547 if (ret < 0)
1548 goto out;
1549 gspca_set_default_mode(gspca_dev);
1550
1551 ret = gspca_input_connect(gspca_dev);
1552 if (ret)
1553 goto out;
1554
1555 #ifdef CONFIG_VIDEO_ADV_DEBUG
1556 if (!gspca_dev->sd_desc->get_register)
1557 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
1558 if (!gspca_dev->sd_desc->set_register)
1559 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
1560 #endif
1561 if (!gspca_dev->sd_desc->get_jcomp)
1562 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
1563 if (!gspca_dev->sd_desc->set_jcomp)
1564 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
1565
1566 /* init video stuff */
1567 ret = video_register_device(&gspca_dev->vdev,
1568 VFL_TYPE_GRABBER,
1569 -1);
1570 if (ret < 0) {
1571 pr_err("video_register_device err %d\n", ret);
1572 goto out;
1573 }
1574
1575 usb_set_intfdata(intf, gspca_dev);
1576 gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
1577 video_device_node_name(&gspca_dev->vdev));
1578
1579 gspca_input_create_urb(gspca_dev);
1580
1581 return 0;
1582 out:
1583 #if IS_ENABLED(CONFIG_INPUT)
1584 if (gspca_dev->input_dev)
1585 input_unregister_device(gspca_dev->input_dev);
1586 #endif
1587 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1588 kfree(gspca_dev->usb_buf);
1589 kfree(gspca_dev);
1590 return ret;
1591 }
1592 EXPORT_SYMBOL(gspca_dev_probe2);
1593
1594 /* same function as the previous one, but check the interface */
1595 int gspca_dev_probe(struct usb_interface *intf,
1596 const struct usb_device_id *id,
1597 const struct sd_desc *sd_desc,
1598 int dev_size,
1599 struct module *module)
1600 {
1601 struct usb_device *dev = interface_to_usbdev(intf);
1602
1603 /* we don't handle multi-config cameras */
1604 if (dev->descriptor.bNumConfigurations != 1) {
1605 pr_err("%04x:%04x too many config\n",
1606 id->idVendor, id->idProduct);
1607 return -ENODEV;
1608 }
1609
1610 /* the USB video interface must be the first one */
1611 if (dev->actconfig->desc.bNumInterfaces != 1
1612 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
1613 return -ENODEV;
1614
1615 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
1616 }
1617 EXPORT_SYMBOL(gspca_dev_probe);
1618
1619 /*
1620 * USB disconnection
1621 *
1622 * This function must be called by the sub-driver
1623 * when the device disconnects, after the specific resources are freed.
1624 */
1625 void gspca_disconnect(struct usb_interface *intf)
1626 {
1627 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1628 #if IS_ENABLED(CONFIG_INPUT)
1629 struct input_dev *input_dev;
1630 #endif
1631
1632 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
1633 video_device_node_name(&gspca_dev->vdev));
1634
1635 mutex_lock(&gspca_dev->usb_lock);
1636 gspca_dev->present = false;
1637 destroy_urbs(gspca_dev);
1638 gspca_input_destroy_urb(gspca_dev);
1639
1640 vb2_queue_error(&gspca_dev->queue);
1641
1642 #if IS_ENABLED(CONFIG_INPUT)
1643 input_dev = gspca_dev->input_dev;
1644 if (input_dev) {
1645 gspca_dev->input_dev = NULL;
1646 input_unregister_device(input_dev);
1647 }
1648 #endif
1649
1650 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
1651 video_unregister_device(&gspca_dev->vdev);
1652
1653 mutex_unlock(&gspca_dev->usb_lock);
1654
1655 /* (this will call gspca_release() immediately or on last close) */
1656 v4l2_device_put(&gspca_dev->v4l2_dev);
1657 }
1658 EXPORT_SYMBOL(gspca_disconnect);
1659
1660 #ifdef CONFIG_PM
1661 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1662 {
1663 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1664
1665 gspca_input_destroy_urb(gspca_dev);
1666
1667 if (!vb2_start_streaming_called(&gspca_dev->queue))
1668 return 0;
1669
1670 mutex_lock(&gspca_dev->usb_lock);
1671 gspca_dev->frozen = 1; /* avoid urb error messages */
1672 gspca_dev->usb_err = 0;
1673 if (gspca_dev->sd_desc->stopN)
1674 gspca_dev->sd_desc->stopN(gspca_dev);
1675 destroy_urbs(gspca_dev);
1676 gspca_set_alt0(gspca_dev);
1677 if (gspca_dev->sd_desc->stop0)
1678 gspca_dev->sd_desc->stop0(gspca_dev);
1679 mutex_unlock(&gspca_dev->usb_lock);
1680
1681 return 0;
1682 }
1683 EXPORT_SYMBOL(gspca_suspend);
1684
1685 int gspca_resume(struct usb_interface *intf)
1686 {
1687 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1688 int streaming, ret = 0;
1689
1690 mutex_lock(&gspca_dev->usb_lock);
1691 gspca_dev->frozen = 0;
1692 gspca_dev->usb_err = 0;
1693 gspca_dev->sd_desc->init(gspca_dev);
1694 /*
1695 * Most subdrivers send all ctrl values on sd_start and thus
1696 * only write to the device registers on s_ctrl when streaming ->
1697 * Clear streaming to avoid setting all ctrls twice.
1698 */
1699 streaming = vb2_start_streaming_called(&gspca_dev->queue);
1700 if (streaming)
1701 ret = gspca_init_transfer(gspca_dev);
1702 else
1703 gspca_input_create_urb(gspca_dev);
1704 mutex_unlock(&gspca_dev->usb_lock);
1705
1706 return ret;
1707 }
1708 EXPORT_SYMBOL(gspca_resume);
1709 #endif
1710
1711 /* -- module insert / remove -- */
1712 static int __init gspca_init(void)
1713 {
1714 pr_info("v" GSPCA_VERSION " registered\n");
1715 return 0;
1716 }
1717 static void __exit gspca_exit(void)
1718 {
1719 }
1720
1721 module_init(gspca_init);
1722 module_exit(gspca_exit);
1723
1724 module_param_named(debug, gspca_debug, int, 0644);
1725 MODULE_PARM_DESC(debug,
1726 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
Linux with added FPC-III support