2 * Main USB camera driver
4 * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
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.
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
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22 #define GSPCA_VERSION "2.14.0"
24 #include <linux/init.h>
26 #include <linux/vmalloc.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
30 #include <linux/string.h>
31 #include <linux/pagemap.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>
43 #if IS_ENABLED(CONFIG_INPUT)
44 #include <linux/input.h>
45 #include <linux/usb/input.h>
49 #define DEF_NURBS 3 /* default number of URBs */
50 #if DEF_NURBS > MAX_NURBS
51 #error "DEF_NURBS too big"
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);
60 EXPORT_SYMBOL(gspca_debug);
62 static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
63 __u32 pixfmt, int w, int h)
65 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
66 gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n",
70 (pixfmt >> 16) & 0xff,
74 gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n",
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
86 * Input and interrupt endpoint handling functions
88 #if IS_ENABLED(CONFIG_INPUT)
89 static void int_irq(struct urb *urb)
91 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
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");
107 /* Stop is requested either by software or hardware is gone,
108 * keep the ret value non-zero and don't resubmit later.
113 gspca_err(gspca_dev, "URB error %i, resubmitting\n",
120 ret = usb_submit_urb(urb, GFP_ATOMIC);
122 pr_err("Resubmit URB failed with error %i\n", ret);
126 static int gspca_input_connect(struct gspca_dev *dev)
128 struct input_dev *input_dev;
131 dev->input_dev = NULL;
132 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
133 input_dev = input_allocate_device();
137 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
138 strlcat(dev->phys, "/input0", sizeof(dev->phys));
140 input_dev->name = dev->sd_desc->name;
141 input_dev->phys = dev->phys;
143 usb_to_input_id(dev->dev, &input_dev->id);
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;
149 err = input_register_device(input_dev);
151 pr_err("Input device registration failed with error %i\n",
153 input_dev->dev.parent = NULL;
154 input_free_device(input_dev);
156 dev->input_dev = input_dev;
163 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
164 struct usb_endpoint_descriptor *ep)
166 unsigned int buffer_len;
169 struct usb_device *dev;
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);
178 dev = gspca_dev->dev;
180 urb = usb_alloc_urb(0, GFP_KERNEL);
186 buffer = usb_alloc_coherent(dev, buffer_len,
187 GFP_KERNEL, &urb->transfer_dma);
192 usb_fill_int_urb(urb, dev,
193 usb_rcvintpipe(dev, ep->bEndpointAddress),
195 int_irq, (void *)gspca_dev, interval);
196 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
197 ret = usb_submit_urb(urb, GFP_KERNEL);
199 gspca_err(gspca_dev, "submit int URB failed with error %i\n",
203 gspca_dev->int_urb = urb;
207 usb_free_coherent(dev,
208 urb->transfer_buffer_length,
209 urb->transfer_buffer,
217 static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
219 struct usb_interface *intf;
220 struct usb_host_interface *intf_desc;
221 struct usb_endpoint_descriptor *ep;
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)) {
232 alloc_and_submit_int_urb(gspca_dev, ep);
239 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
243 urb = gspca_dev->int_urb;
245 gspca_dev->int_urb = NULL;
247 usb_free_coherent(gspca_dev->dev,
248 urb->transfer_buffer_length,
249 urb->transfer_buffer,
255 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
259 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
263 static inline int gspca_input_connect(struct gspca_dev *dev)
270 * fill a video frame from an URB and resubmit
272 static void fill_frame(struct gspca_dev *gspca_dev,
275 u8 *data; /* address of data in the iso message */
279 if (urb->status != 0) {
280 if (urb->status == -ESHUTDOWN)
281 return; /* disconnection */
283 if (gspca_dev->frozen)
286 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
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;
294 /* check the packet status and length */
295 st = urb->iso_frame_desc[i].status;
297 gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n",
299 gspca_dev->last_packet_type = DISCARD_PACKET;
303 if (gspca_dev->empty_packet == 0)
304 gspca_dev->empty_packet = 1;
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);
317 if (!gspca_dev->streaming)
319 /* resubmit the URB */
320 st = usb_submit_urb(urb, GFP_ATOMIC);
322 pr_err("usb_submit_urb() ret %d\n", st);
326 * ISOC message interrupt from the USB device
328 * Analyse each packet and call the subdriver for copy to the frame buffer.
330 static void isoc_irq(struct urb *urb)
332 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
334 gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
335 if (!gspca_dev->streaming)
337 fill_frame(gspca_dev, urb);
341 * bulk message interrupt from the USB device
343 static void bulk_irq(struct urb *urb)
345 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
348 gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
349 if (!gspca_dev->streaming)
351 switch (urb->status) {
355 return; /* disconnection */
358 if (gspca_dev->frozen)
361 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
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,
372 if (!gspca_dev->streaming)
374 /* resubmit the URB */
375 if (gspca_dev->cam.bulk_nurbs != 0) {
376 st = usb_submit_urb(urb, GFP_ATOMIC);
378 pr_err("usb_submit_urb() ret %d\n", st);
383 * add data to the current frame
385 * This function is called by the subdrivers at interrupt level.
387 * To build a frame, these ones must add
389 * - 0 or many INTER_PACKETs
391 * DISCARD_PACKET invalidates the whole frame.
393 void gspca_frame_add(struct gspca_dev *gspca_dev,
394 enum gspca_packet_type packet_type,
398 struct gspca_buffer *buf;
401 gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len);
403 spin_lock_irqsave(&gspca_dev->qlock, flags);
404 buf = list_first_entry_or_null(&gspca_dev->buf_list,
406 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
408 if (packet_type == FIRST_PACKET) {
409 /* if there is no queued buffer, discard the whole frame */
411 gspca_dev->last_packet_type = DISCARD_PACKET;
412 gspca_dev->sequence++;
415 gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
416 gspca_dev->image_len = 0;
418 switch (gspca_dev->last_packet_type) {
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;
431 /* append the packet to the frame buffer */
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;
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");
445 memcpy(gspca_dev->image + gspca_dev->image_len,
447 gspca_dev->image_len += len;
450 gspca_dev->last_packet_type = packet_type;
452 /* if last packet, invalidate packet concatenation until
453 * next first packet, wake up the application and advance
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;
471 EXPORT_SYMBOL(gspca_frame_add);
473 static void destroy_urbs(struct gspca_dev *gspca_dev)
478 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
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]
484 for (i = 0; i < MAX_NURBS; i++)
485 usb_kill_urb(gspca_dev->urb[i]);
487 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
488 for (i = 0; i < MAX_NURBS; i++) {
489 urb = gspca_dev->urb[i];
492 gspca_dev->urb[i] = NULL;
493 usb_free_coherent(gspca_dev->dev,
494 urb->transfer_buffer_length,
495 urb->transfer_buffer,
501 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
505 if (gspca_dev->alt == 0)
507 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
509 pr_err("set alt 0 err %d\n", ret);
514 * look for an input transfer endpoint in an alternate setting.
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.
519 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
520 int xfer, int xfer_ep)
522 struct usb_host_endpoint *ep;
525 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
526 ep = &alt->endpoint[i];
527 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
529 && ep->desc.wMaxPacketSize != 0
530 && usb_endpoint_dir_in(&ep->desc)
531 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
537 /* compute the minimum bandwidth for the current transfer */
538 static u32 which_bandwidth(struct gspca_dev *gspca_dev)
542 /* get the (max) image size */
543 bandwidth = gspca_dev->pixfmt.sizeimage;
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 */
551 /* estimate the frame rate */
552 if (gspca_dev->sd_desc->get_streamparm) {
553 struct v4l2_streamparm parm;
555 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
556 bandwidth *= parm.parm.capture.timeperframe.denominator;
557 bandwidth /= parm.parm.capture.timeperframe.numerator;
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 */
566 bandwidth *= 30; /* 30 fps */
569 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
581 * build the table of the endpoints
582 * and compute the minimum bandwidth for the image transfer
584 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
585 struct usb_interface *intf,
586 struct ep_tb_s *ep_tb)
588 struct usb_host_endpoint *ep;
589 int i, j, nbalt, psize, found;
590 u32 bandwidth, last_bw;
592 nbalt = intf->num_altsetting;
594 nbalt = MAX_ALT; /* fixme: should warn */
596 /* build the endpoint table */
600 ep_tb->bandwidth = 2000 * 2000 * 120;
602 for (j = 0; j < nbalt; j++) {
603 ep = alt_xfer(&intf->altsetting[j],
604 USB_ENDPOINT_XFER_ISOC,
608 if (ep->desc.bInterval == 0) {
609 pr_err("alt %d iso endp with 0 interval\n", j);
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)
618 bandwidth /= 1 << (ep->desc.bInterval - 1);
619 if (bandwidth <= last_bw)
621 if (bandwidth < ep_tb->bandwidth) {
622 ep_tb->bandwidth = bandwidth;
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;
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
644 if (gspca_dev->audio &&
645 gspca_dev->dev->speed == USB_SPEED_FULL &&
646 last_bw >= 1000000 &&
648 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
653 /* get the requested bandwidth and start at the highest atlsetting */
654 bandwidth = which_bandwidth(gspca_dev);
658 if (ep_tb->bandwidth < bandwidth)
666 * create the URBs for image transfer
668 static int create_urbs(struct gspca_dev *gspca_dev,
669 struct usb_host_endpoint *ep)
672 int n, nurbs, i, psize, npkt, bsize;
674 /* calculate the packet size and the number of packets */
675 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
677 if (!gspca_dev->cam.bulk) { /* isoc */
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));
683 psize = gspca_dev->pkt_size;
684 npkt = gspca_dev->cam.npkt;
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",
694 bsize = gspca_dev->cam.bulk_size;
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;
704 for (n = 0; n < nurbs; n++) {
705 urb = usb_alloc_urb(npkt, GFP_KERNEL);
708 gspca_dev->urb[n] = urb;
709 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
714 if (urb->transfer_buffer == NULL) {
715 pr_err("usb_alloc_coherent failed\n");
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;
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;
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)
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");
761 * start the USB transfer
763 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
765 struct usb_interface *intf;
766 struct usb_host_endpoint *ep;
768 struct ep_tb_s ep_tb[MAX_ALT];
769 int n, ret, xfer, alt, alt_idx;
771 /* reset the streaming variables */
772 gspca_dev->image = NULL;
773 gspca_dev->image_len = 0;
774 gspca_dev->last_packet_type = DISCARD_PACKET;
776 gspca_dev->usb_err = 0;
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);
786 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
787 : USB_ENDPOINT_XFER_ISOC;
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,
795 pr_err("bad altsetting %d\n", gspca_dev->alt);
798 ep_tb[0].alt = gspca_dev->alt;
801 /* else, compute the minimum bandwidth
802 * and build the endpoint table */
803 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
805 pr_err("no transfer endpoint found\n");
810 /* set the highest alternate setting and
811 * loop until urb submit succeeds */
812 gspca_input_destroy_urb(gspca_dev);
814 gspca_dev->alt = ep_tb[--alt_idx].alt;
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,
825 goto retry; /*fixme: ugly*/
826 pr_err("set alt %d err %d\n", alt, ret);
831 if (!gspca_dev->cam.no_urb_create) {
832 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
834 ret = create_urbs(gspca_dev,
835 alt_xfer(&intf->altsetting[alt], xfer,
836 gspca_dev->xfer_ep));
838 destroy_urbs(gspca_dev);
843 /* clear the bulk endpoint */
844 if (gspca_dev->cam.bulk)
845 usb_clear_halt(gspca_dev->dev,
846 gspca_dev->urb[0]->pipe);
849 ret = gspca_dev->sd_desc->start(gspca_dev);
851 destroy_urbs(gspca_dev);
854 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
855 gspca_dev->streaming = true;
857 /* some bulk transfers are started by the subdriver */
858 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
861 /* submit the URBs */
862 for (n = 0; n < MAX_NURBS; n++) {
863 urb = gspca_dev->urb[n];
866 ret = usb_submit_urb(urb, GFP_KERNEL);
871 break; /* transfer is started */
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);
882 /* the bandwidth is not wide enough
883 * negotiate or try a lower alternate setting */
885 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
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);
894 pr_err("no transfer endpoint found\n");
898 gspca_dev->alt = ep_tb[--alt_idx].alt;
902 gspca_input_create_urb(gspca_dev);
906 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
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];
914 /* does nothing if ctrl_handler == NULL */
915 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
918 static int wxh_to_mode(struct gspca_dev *gspca_dev,
919 int width, int height, u32 pixelformat)
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 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
932 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
933 int width, int height, u32 pixelformat)
937 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
938 if (width >= gspca_dev->cam.cam_mode[i].width
939 && height >= gspca_dev->cam.cam_mode[i].height
940 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
943 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
944 if (width >= gspca_dev->cam.cam_mode[i].width
945 && height >= gspca_dev->cam.cam_mode[i].height)
952 * search a mode with the right pixel format
954 static int gspca_get_mode(struct gspca_dev *gspca_dev,
960 modeU = modeD = mode;
961 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
963 if (gspca_dev->cam.cam_mode[modeD].pixelformat
967 if (++modeU < gspca_dev->cam.nmodes) {
968 if (gspca_dev->cam.cam_mode[modeU].pixelformat
976 #ifdef CONFIG_VIDEO_ADV_DEBUG
977 static int vidioc_g_chip_info(struct file *file, void *priv,
978 struct v4l2_dbg_chip_info *chip)
980 struct gspca_dev *gspca_dev = video_drvdata(file);
982 gspca_dev->usb_err = 0;
983 if (gspca_dev->sd_desc->get_chip_info)
984 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
985 return chip->match.addr ? -EINVAL : 0;
988 static int vidioc_g_register(struct file *file, void *priv,
989 struct v4l2_dbg_register *reg)
991 struct gspca_dev *gspca_dev = video_drvdata(file);
993 gspca_dev->usb_err = 0;
994 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
997 static int vidioc_s_register(struct file *file, void *priv,
998 const struct v4l2_dbg_register *reg)
1000 struct gspca_dev *gspca_dev = video_drvdata(file);
1002 gspca_dev->usb_err = 0;
1003 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
1007 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1008 struct v4l2_fmtdesc *fmtdesc)
1010 struct gspca_dev *gspca_dev = video_drvdata(file);
1014 /* give an index to each format */
1016 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1017 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1020 if (fmt_tb[j] == fmt_tb[index])
1025 if (fmtdesc->index == index)
1026 break; /* new format */
1028 if (index >= ARRAY_SIZE(fmt_tb))
1033 return -EINVAL; /* no more format */
1035 fmtdesc->pixelformat = fmt_tb[index];
1036 if (gspca_dev->cam.cam_mode[i].sizeimage <
1037 gspca_dev->cam.cam_mode[i].width *
1038 gspca_dev->cam.cam_mode[i].height)
1039 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1040 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1041 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1042 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1043 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1044 fmtdesc->description[4] = '\0';
1048 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1049 struct v4l2_format *fmt)
1051 struct gspca_dev *gspca_dev = video_drvdata(file);
1053 fmt->fmt.pix = gspca_dev->pixfmt;
1054 /* some drivers use priv internally, zero it before giving it back to
1056 fmt->fmt.pix.priv = 0;
1060 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1061 struct v4l2_format *fmt)
1063 int w, h, mode, mode2;
1065 w = fmt->fmt.pix.width;
1066 h = fmt->fmt.pix.height;
1068 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1069 fmt->fmt.pix.pixelformat, w, h);
1071 /* search the nearest mode for width and height */
1072 mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat);
1074 /* OK if right palette */
1075 if (gspca_dev->cam.cam_mode[mode].pixelformat
1076 != fmt->fmt.pix.pixelformat) {
1078 /* else, search the closest mode with the same pixel format */
1079 mode2 = gspca_get_mode(gspca_dev, mode,
1080 fmt->fmt.pix.pixelformat);
1084 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1085 if (gspca_dev->sd_desc->try_fmt) {
1086 /* pass original resolution to subdriver try_fmt */
1087 fmt->fmt.pix.width = w;
1088 fmt->fmt.pix.height = h;
1089 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1091 /* some drivers use priv internally, zero it before giving it back to
1093 fmt->fmt.pix.priv = 0;
1094 return mode; /* used when s_fmt */
1097 static int vidioc_try_fmt_vid_cap(struct file *file,
1099 struct v4l2_format *fmt)
1101 struct gspca_dev *gspca_dev = video_drvdata(file);
1103 if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
1108 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1109 struct v4l2_format *fmt)
1111 struct gspca_dev *gspca_dev = video_drvdata(file);
1114 if (vb2_is_busy(&gspca_dev->queue))
1117 mode = try_fmt_vid_cap(gspca_dev, fmt);
1121 gspca_dev->curr_mode = mode;
1122 if (gspca_dev->sd_desc->try_fmt)
1123 /* subdriver try_fmt can modify format parameters */
1124 gspca_dev->pixfmt = fmt->fmt.pix;
1126 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1130 static int vidioc_enum_framesizes(struct file *file, void *priv,
1131 struct v4l2_frmsizeenum *fsize)
1133 struct gspca_dev *gspca_dev = video_drvdata(file);
1137 if (gspca_dev->sd_desc->enum_framesizes)
1138 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1140 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1141 if (fsize->pixel_format !=
1142 gspca_dev->cam.cam_mode[i].pixelformat)
1145 if (fsize->index == index) {
1146 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1147 fsize->discrete.width =
1148 gspca_dev->cam.cam_mode[i].width;
1149 fsize->discrete.height =
1150 gspca_dev->cam.cam_mode[i].height;
1159 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1160 struct v4l2_frmivalenum *fival)
1162 struct gspca_dev *gspca_dev = video_drvdata(filp);
1166 mode = wxh_to_mode(gspca_dev, fival->width, fival->height,
1167 fival->pixel_format);
1171 if (gspca_dev->cam.mode_framerates == NULL ||
1172 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1175 if (fival->pixel_format !=
1176 gspca_dev->cam.cam_mode[mode].pixelformat)
1179 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1180 if (fival->index == i) {
1181 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1182 fival->discrete.numerator = 1;
1183 fival->discrete.denominator =
1184 gspca_dev->cam.mode_framerates[mode].rates[i];
1192 static void gspca_release(struct v4l2_device *v4l2_device)
1194 struct gspca_dev *gspca_dev =
1195 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1197 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1198 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1199 kfree(gspca_dev->usb_buf);
1203 static int vidioc_querycap(struct file *file, void *priv,
1204 struct v4l2_capability *cap)
1206 struct gspca_dev *gspca_dev = video_drvdata(file);
1208 strscpy((char *)cap->driver, gspca_dev->sd_desc->name,
1209 sizeof(cap->driver));
1210 if (gspca_dev->dev->product != NULL) {
1211 strscpy((char *)cap->card, gspca_dev->dev->product,
1214 snprintf((char *) cap->card, sizeof cap->card,
1215 "USB Camera (%04x:%04x)",
1216 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1217 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1219 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1220 sizeof(cap->bus_info));
1221 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1222 | V4L2_CAP_STREAMING
1223 | V4L2_CAP_READWRITE;
1224 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1228 static int vidioc_enum_input(struct file *file, void *priv,
1229 struct v4l2_input *input)
1231 struct gspca_dev *gspca_dev = video_drvdata(file);
1233 if (input->index != 0)
1235 input->type = V4L2_INPUT_TYPE_CAMERA;
1236 input->status = gspca_dev->cam.input_flags;
1237 strscpy(input->name, gspca_dev->sd_desc->name,
1238 sizeof input->name);
1242 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1248 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1255 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1256 struct v4l2_jpegcompression *jpegcomp)
1258 struct gspca_dev *gspca_dev = video_drvdata(file);
1260 gspca_dev->usb_err = 0;
1261 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1264 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1265 const struct v4l2_jpegcompression *jpegcomp)
1267 struct gspca_dev *gspca_dev = video_drvdata(file);
1269 gspca_dev->usb_err = 0;
1270 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1273 static int vidioc_g_parm(struct file *filp, void *priv,
1274 struct v4l2_streamparm *parm)
1276 struct gspca_dev *gspca_dev = video_drvdata(filp);
1278 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1280 if (!gspca_dev->sd_desc->get_streamparm)
1283 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1284 gspca_dev->usb_err = 0;
1285 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1286 return gspca_dev->usb_err;
1289 static int vidioc_s_parm(struct file *filp, void *priv,
1290 struct v4l2_streamparm *parm)
1292 struct gspca_dev *gspca_dev = video_drvdata(filp);
1294 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1296 if (!gspca_dev->sd_desc->set_streamparm) {
1297 parm->parm.capture.capability = 0;
1301 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1302 gspca_dev->usb_err = 0;
1303 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1304 return gspca_dev->usb_err;
1307 static int gspca_queue_setup(struct vb2_queue *vq,
1308 unsigned int *nbuffers, unsigned int *nplanes,
1309 unsigned int sizes[], struct device *alloc_devs[])
1311 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1312 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1315 return sizes[0] < size ? -EINVAL : 0;
1321 static int gspca_buffer_prepare(struct vb2_buffer *vb)
1323 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1324 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1326 if (vb2_plane_size(vb, 0) < size) {
1327 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
1328 vb2_plane_size(vb, 0), size);
1334 static void gspca_buffer_finish(struct vb2_buffer *vb)
1336 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1338 if (!gspca_dev->sd_desc->dq_callback)
1341 gspca_dev->usb_err = 0;
1342 if (gspca_dev->present)
1343 gspca_dev->sd_desc->dq_callback(gspca_dev);
1346 static void gspca_buffer_queue(struct vb2_buffer *vb)
1348 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1349 struct gspca_buffer *buf = to_gspca_buffer(vb);
1350 unsigned long flags;
1352 spin_lock_irqsave(&gspca_dev->qlock, flags);
1353 list_add_tail(&buf->list, &gspca_dev->buf_list);
1354 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1357 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
1358 enum vb2_buffer_state state)
1360 struct gspca_buffer *buf, *node;
1361 unsigned long flags;
1363 spin_lock_irqsave(&gspca_dev->qlock, flags);
1364 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
1365 vb2_buffer_done(&buf->vb.vb2_buf, state);
1366 list_del(&buf->list);
1368 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1371 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
1373 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1376 gspca_dev->sequence = 0;
1378 ret = gspca_init_transfer(gspca_dev);
1380 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
1384 static void gspca_stop_streaming(struct vb2_queue *vq)
1386 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1388 gspca_stream_off(gspca_dev);
1390 /* Release all active buffers */
1391 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
1394 static const struct vb2_ops gspca_qops = {
1395 .queue_setup = gspca_queue_setup,
1396 .buf_prepare = gspca_buffer_prepare,
1397 .buf_finish = gspca_buffer_finish,
1398 .buf_queue = gspca_buffer_queue,
1399 .start_streaming = gspca_start_streaming,
1400 .stop_streaming = gspca_stop_streaming,
1401 .wait_prepare = vb2_ops_wait_prepare,
1402 .wait_finish = vb2_ops_wait_finish,
1405 static const struct v4l2_file_operations dev_fops = {
1406 .owner = THIS_MODULE,
1407 .open = v4l2_fh_open,
1408 .release = vb2_fop_release,
1409 .unlocked_ioctl = video_ioctl2,
1410 .read = vb2_fop_read,
1411 .mmap = vb2_fop_mmap,
1412 .poll = vb2_fop_poll,
1415 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1416 .vidioc_querycap = vidioc_querycap,
1417 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1418 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1419 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1420 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1421 .vidioc_enum_input = vidioc_enum_input,
1422 .vidioc_g_input = vidioc_g_input,
1423 .vidioc_s_input = vidioc_s_input,
1424 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1425 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1426 .vidioc_g_parm = vidioc_g_parm,
1427 .vidioc_s_parm = vidioc_s_parm,
1428 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1429 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1431 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1432 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1433 .vidioc_querybuf = vb2_ioctl_querybuf,
1434 .vidioc_qbuf = vb2_ioctl_qbuf,
1435 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1436 .vidioc_expbuf = vb2_ioctl_expbuf,
1437 .vidioc_streamon = vb2_ioctl_streamon,
1438 .vidioc_streamoff = vb2_ioctl_streamoff,
1440 #ifdef CONFIG_VIDEO_ADV_DEBUG
1441 .vidioc_g_chip_info = vidioc_g_chip_info,
1442 .vidioc_g_register = vidioc_g_register,
1443 .vidioc_s_register = vidioc_s_register,
1445 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1446 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1449 static const struct video_device gspca_template = {
1450 .name = "gspca main driver",
1452 .ioctl_ops = &dev_ioctl_ops,
1453 .release = video_device_release_empty, /* We use v4l2_dev.release */
1457 * probe and create a new gspca device
1459 * This function must be called by the sub-driver when it is
1460 * called for probing a new device.
1462 int gspca_dev_probe2(struct usb_interface *intf,
1463 const struct usb_device_id *id,
1464 const struct sd_desc *sd_desc,
1466 struct module *module)
1468 struct gspca_dev *gspca_dev;
1469 struct usb_device *dev = interface_to_usbdev(intf);
1470 struct vb2_queue *q;
1473 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
1474 sd_desc->name, id->idVendor, id->idProduct);
1476 /* create the device */
1477 if (dev_size < sizeof *gspca_dev)
1478 dev_size = sizeof *gspca_dev;
1479 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
1481 pr_err("couldn't kzalloc gspca struct\n");
1484 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
1485 if (!gspca_dev->usb_buf) {
1486 pr_err("out of memory\n");
1490 gspca_dev->dev = dev;
1491 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
1492 gspca_dev->xfer_ep = -1;
1494 /* check if any audio device */
1495 if (dev->actconfig->desc.bNumInterfaces != 1) {
1497 struct usb_interface *intf2;
1499 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
1500 intf2 = dev->actconfig->interface[i];
1502 && intf2->altsetting != NULL
1503 && intf2->altsetting->desc.bInterfaceClass ==
1505 gspca_dev->audio = 1;
1511 gspca_dev->v4l2_dev.release = gspca_release;
1512 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
1515 gspca_dev->present = true;
1516 gspca_dev->sd_desc = sd_desc;
1517 gspca_dev->empty_packet = -1; /* don't check the empty packets */
1518 gspca_dev->vdev = gspca_template;
1519 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1520 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
1521 gspca_dev->module = module;
1523 mutex_init(&gspca_dev->usb_lock);
1524 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
1525 init_waitqueue_head(&gspca_dev->wq);
1527 /* Initialize the vb2 queue */
1528 q = &gspca_dev->queue;
1529 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1530 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1531 q->drv_priv = gspca_dev;
1532 q->buf_struct_size = sizeof(struct gspca_buffer);
1533 q->ops = &gspca_qops;
1534 q->mem_ops = &vb2_vmalloc_memops;
1535 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1536 q->min_buffers_needed = 2;
1537 q->lock = &gspca_dev->usb_lock;
1538 ret = vb2_queue_init(q);
1541 gspca_dev->vdev.queue = q;
1543 INIT_LIST_HEAD(&gspca_dev->buf_list);
1544 spin_lock_init(&gspca_dev->qlock);
1546 /* configure the subdriver and initialize the USB device */
1547 ret = sd_desc->config(gspca_dev, id);
1550 ret = sd_desc->init(gspca_dev);
1553 if (sd_desc->init_controls)
1554 ret = sd_desc->init_controls(gspca_dev);
1557 gspca_set_default_mode(gspca_dev);
1559 ret = gspca_input_connect(gspca_dev);
1563 #ifdef CONFIG_VIDEO_ADV_DEBUG
1564 if (!gspca_dev->sd_desc->get_register)
1565 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
1566 if (!gspca_dev->sd_desc->set_register)
1567 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
1569 if (!gspca_dev->sd_desc->get_jcomp)
1570 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
1571 if (!gspca_dev->sd_desc->set_jcomp)
1572 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
1574 /* init video stuff */
1575 ret = video_register_device(&gspca_dev->vdev,
1579 pr_err("video_register_device err %d\n", ret);
1583 usb_set_intfdata(intf, gspca_dev);
1584 gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
1585 video_device_node_name(&gspca_dev->vdev));
1587 gspca_input_create_urb(gspca_dev);
1591 #if IS_ENABLED(CONFIG_INPUT)
1592 if (gspca_dev->input_dev)
1593 input_unregister_device(gspca_dev->input_dev);
1595 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1596 kfree(gspca_dev->usb_buf);
1600 EXPORT_SYMBOL(gspca_dev_probe2);
1602 /* same function as the previous one, but check the interface */
1603 int gspca_dev_probe(struct usb_interface *intf,
1604 const struct usb_device_id *id,
1605 const struct sd_desc *sd_desc,
1607 struct module *module)
1609 struct usb_device *dev = interface_to_usbdev(intf);
1611 /* we don't handle multi-config cameras */
1612 if (dev->descriptor.bNumConfigurations != 1) {
1613 pr_err("%04x:%04x too many config\n",
1614 id->idVendor, id->idProduct);
1618 /* the USB video interface must be the first one */
1619 if (dev->actconfig->desc.bNumInterfaces != 1
1620 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
1623 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
1625 EXPORT_SYMBOL(gspca_dev_probe);
1630 * This function must be called by the sub-driver
1631 * when the device disconnects, after the specific resources are freed.
1633 void gspca_disconnect(struct usb_interface *intf)
1635 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1636 #if IS_ENABLED(CONFIG_INPUT)
1637 struct input_dev *input_dev;
1640 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
1641 video_device_node_name(&gspca_dev->vdev));
1643 mutex_lock(&gspca_dev->usb_lock);
1644 gspca_dev->present = false;
1645 destroy_urbs(gspca_dev);
1646 gspca_input_destroy_urb(gspca_dev);
1648 vb2_queue_error(&gspca_dev->queue);
1650 #if IS_ENABLED(CONFIG_INPUT)
1651 input_dev = gspca_dev->input_dev;
1653 gspca_dev->input_dev = NULL;
1654 input_unregister_device(input_dev);
1658 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
1659 video_unregister_device(&gspca_dev->vdev);
1661 mutex_unlock(&gspca_dev->usb_lock);
1663 /* (this will call gspca_release() immediately or on last close) */
1664 v4l2_device_put(&gspca_dev->v4l2_dev);
1666 EXPORT_SYMBOL(gspca_disconnect);
1669 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1671 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1673 gspca_input_destroy_urb(gspca_dev);
1675 if (!vb2_start_streaming_called(&gspca_dev->queue))
1678 mutex_lock(&gspca_dev->usb_lock);
1679 gspca_dev->frozen = 1; /* avoid urb error messages */
1680 gspca_dev->usb_err = 0;
1681 if (gspca_dev->sd_desc->stopN)
1682 gspca_dev->sd_desc->stopN(gspca_dev);
1683 destroy_urbs(gspca_dev);
1684 gspca_set_alt0(gspca_dev);
1685 if (gspca_dev->sd_desc->stop0)
1686 gspca_dev->sd_desc->stop0(gspca_dev);
1687 mutex_unlock(&gspca_dev->usb_lock);
1691 EXPORT_SYMBOL(gspca_suspend);
1693 int gspca_resume(struct usb_interface *intf)
1695 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1696 int streaming, ret = 0;
1698 mutex_lock(&gspca_dev->usb_lock);
1699 gspca_dev->frozen = 0;
1700 gspca_dev->usb_err = 0;
1701 gspca_dev->sd_desc->init(gspca_dev);
1703 * Most subdrivers send all ctrl values on sd_start and thus
1704 * only write to the device registers on s_ctrl when streaming ->
1705 * Clear streaming to avoid setting all ctrls twice.
1707 streaming = vb2_start_streaming_called(&gspca_dev->queue);
1709 ret = gspca_init_transfer(gspca_dev);
1711 gspca_input_create_urb(gspca_dev);
1712 mutex_unlock(&gspca_dev->usb_lock);
1716 EXPORT_SYMBOL(gspca_resume);
1719 /* -- module insert / remove -- */
1720 static int __init gspca_init(void)
1722 pr_info("v" GSPCA_VERSION " registered\n");
1725 static void __exit gspca_exit(void)
1729 module_init(gspca_init);
1730 module_exit(gspca_exit);
1732 module_param_named(debug, gspca_debug, int, 0644);
1733 MODULE_PARM_DESC(debug,
1734 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");