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 pr_err("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 /* resubmit the URB */
318 st = usb_submit_urb(urb, GFP_ATOMIC);
320 pr_err("usb_submit_urb() ret %d\n", st);
324 * ISOC message interrupt from the USB device
326 * Analyse each packet and call the subdriver for copy to the frame buffer.
328 static void isoc_irq(struct urb *urb)
330 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
332 gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
333 if (!vb2_start_streaming_called(&gspca_dev->queue))
335 fill_frame(gspca_dev, urb);
339 * bulk message interrupt from the USB device
341 static void bulk_irq(struct urb *urb)
343 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
346 gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
347 if (!vb2_start_streaming_called(&gspca_dev->queue))
349 switch (urb->status) {
353 return; /* disconnection */
356 if (gspca_dev->frozen)
359 gspca_err(gspca_dev, "urb status: %d\n", urb->status);
364 gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length);
365 gspca_dev->sd_desc->pkt_scan(gspca_dev,
366 urb->transfer_buffer,
370 /* resubmit the URB */
371 if (gspca_dev->cam.bulk_nurbs != 0) {
372 st = usb_submit_urb(urb, GFP_ATOMIC);
374 pr_err("usb_submit_urb() ret %d\n", st);
379 * add data to the current frame
381 * This function is called by the subdrivers at interrupt level.
383 * To build a frame, these ones must add
385 * - 0 or many INTER_PACKETs
387 * DISCARD_PACKET invalidates the whole frame.
389 void gspca_frame_add(struct gspca_dev *gspca_dev,
390 enum gspca_packet_type packet_type,
394 struct gspca_buffer *buf;
397 gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len);
399 spin_lock_irqsave(&gspca_dev->qlock, flags);
400 buf = list_first_entry_or_null(&gspca_dev->buf_list,
402 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
404 if (packet_type == FIRST_PACKET) {
405 /* if there is no queued buffer, discard the whole frame */
407 gspca_dev->last_packet_type = DISCARD_PACKET;
408 gspca_dev->sequence++;
411 gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
412 gspca_dev->image_len = 0;
414 switch (gspca_dev->last_packet_type) {
416 if (packet_type == LAST_PACKET) {
417 gspca_dev->last_packet_type = packet_type;
418 gspca_dev->image = NULL;
419 gspca_dev->image_len = 0;
427 /* append the packet to the frame buffer */
429 if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) {
430 gspca_err(gspca_dev, "frame overflow %d > %d\n",
431 gspca_dev->image_len + len,
432 PAGE_ALIGN(gspca_dev->pixfmt.sizeimage));
433 packet_type = DISCARD_PACKET;
435 /* !! image is NULL only when last pkt is LAST or DISCARD
436 if (gspca_dev->image == NULL) {
437 pr_err("gspca_frame_add() image == NULL\n");
441 memcpy(gspca_dev->image + gspca_dev->image_len,
443 gspca_dev->image_len += len;
446 gspca_dev->last_packet_type = packet_type;
448 /* if last packet, invalidate packet concatenation until
449 * next first packet, wake up the application and advance
451 if (packet_type == LAST_PACKET) {
452 spin_lock_irqsave(&gspca_dev->qlock, flags);
453 list_del(&buf->list);
454 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
455 buf->vb.vb2_buf.timestamp = ktime_get_ns();
456 vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
457 gspca_dev->image_len);
458 buf->vb.sequence = gspca_dev->sequence++;
459 buf->vb.field = V4L2_FIELD_NONE;
460 gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n",
461 gspca_dev->image_len);
462 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
463 gspca_dev->image = NULL;
464 gspca_dev->image_len = 0;
467 EXPORT_SYMBOL(gspca_frame_add);
469 static void destroy_urbs(struct gspca_dev *gspca_dev)
474 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
476 /* Killing all URBs guarantee that no URB completion
477 * handler is running. Therefore, there shouldn't
478 * be anyone trying to access gspca_dev->urb[i]
480 for (i = 0; i < MAX_NURBS; i++)
481 usb_kill_urb(gspca_dev->urb[i]);
483 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
484 for (i = 0; i < MAX_NURBS; i++) {
485 urb = gspca_dev->urb[i];
488 gspca_dev->urb[i] = NULL;
489 usb_free_coherent(gspca_dev->dev,
490 urb->transfer_buffer_length,
491 urb->transfer_buffer,
497 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
501 if (gspca_dev->alt == 0)
503 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
505 pr_err("set alt 0 err %d\n", ret);
510 * look for an input transfer endpoint in an alternate setting.
512 * If xfer_ep is invalid, return the first valid ep found, otherwise
513 * look for exactly the ep with address equal to xfer_ep.
515 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
516 int xfer, int xfer_ep)
518 struct usb_host_endpoint *ep;
521 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
522 ep = &alt->endpoint[i];
523 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
525 && ep->desc.wMaxPacketSize != 0
526 && usb_endpoint_dir_in(&ep->desc)
527 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
533 /* compute the minimum bandwidth for the current transfer */
534 static u32 which_bandwidth(struct gspca_dev *gspca_dev)
538 /* get the (max) image size */
539 bandwidth = gspca_dev->pixfmt.sizeimage;
541 /* if the image is compressed, estimate its mean size */
542 if (!gspca_dev->cam.needs_full_bandwidth &&
543 bandwidth < gspca_dev->pixfmt.width *
544 gspca_dev->pixfmt.height)
545 bandwidth = bandwidth * 3 / 8; /* 0.375 */
547 /* estimate the frame rate */
548 if (gspca_dev->sd_desc->get_streamparm) {
549 struct v4l2_streamparm parm;
551 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
552 bandwidth *= parm.parm.capture.timeperframe.denominator;
553 bandwidth /= parm.parm.capture.timeperframe.numerator;
556 /* don't hope more than 15 fps with USB 1.1 and
557 * image resolution >= 640x480 */
558 if (gspca_dev->pixfmt.width >= 640
559 && gspca_dev->dev->speed == USB_SPEED_FULL)
560 bandwidth *= 15; /* 15 fps */
562 bandwidth *= 30; /* 30 fps */
565 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
577 * build the table of the endpoints
578 * and compute the minimum bandwidth for the image transfer
580 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
581 struct usb_interface *intf,
582 struct ep_tb_s *ep_tb)
584 struct usb_host_endpoint *ep;
585 int i, j, nbalt, psize, found;
586 u32 bandwidth, last_bw;
588 nbalt = intf->num_altsetting;
590 nbalt = MAX_ALT; /* fixme: should warn */
592 /* build the endpoint table */
596 ep_tb->bandwidth = 2000 * 2000 * 120;
598 for (j = 0; j < nbalt; j++) {
599 ep = alt_xfer(&intf->altsetting[j],
600 USB_ENDPOINT_XFER_ISOC,
604 if (ep->desc.bInterval == 0) {
605 pr_err("alt %d iso endp with 0 interval\n", j);
608 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
609 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
610 bandwidth = psize * 1000;
611 if (gspca_dev->dev->speed == USB_SPEED_HIGH
612 || gspca_dev->dev->speed >= USB_SPEED_SUPER)
614 bandwidth /= 1 << (ep->desc.bInterval - 1);
615 if (bandwidth <= last_bw)
617 if (bandwidth < ep_tb->bandwidth) {
618 ep_tb->bandwidth = bandwidth;
625 gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n",
626 ep_tb->alt, ep_tb->bandwidth);
627 last_bw = ep_tb->bandwidth;
634 * has a usb audio class interface (a built in usb mic); and
635 * is a usb 1 full speed device; and
636 * uses the max full speed iso bandwidth; and
637 * and has more than 1 alt setting
638 * then skip the highest alt setting to spare bandwidth for the mic
640 if (gspca_dev->audio &&
641 gspca_dev->dev->speed == USB_SPEED_FULL &&
642 last_bw >= 1000000 &&
644 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
649 /* get the requested bandwidth and start at the highest atlsetting */
650 bandwidth = which_bandwidth(gspca_dev);
654 if (ep_tb->bandwidth < bandwidth)
662 * create the URBs for image transfer
664 static int create_urbs(struct gspca_dev *gspca_dev,
665 struct usb_host_endpoint *ep)
668 int n, nurbs, i, psize, npkt, bsize;
670 /* calculate the packet size and the number of packets */
671 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
673 if (!gspca_dev->cam.bulk) { /* isoc */
675 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
676 if (gspca_dev->pkt_size == 0)
677 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
679 psize = gspca_dev->pkt_size;
680 npkt = gspca_dev->cam.npkt;
682 npkt = 32; /* default value */
683 bsize = psize * npkt;
684 gspca_dbg(gspca_dev, D_STREAM,
685 "isoc %d pkts size %d = bsize:%d\n",
690 bsize = gspca_dev->cam.bulk_size;
693 gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize);
694 if (gspca_dev->cam.bulk_nurbs != 0)
695 nurbs = gspca_dev->cam.bulk_nurbs;
700 for (n = 0; n < nurbs; n++) {
701 urb = usb_alloc_urb(npkt, GFP_KERNEL);
704 gspca_dev->urb[n] = urb;
705 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
710 if (urb->transfer_buffer == NULL) {
711 pr_err("usb_alloc_coherent failed\n");
714 urb->dev = gspca_dev->dev;
715 urb->context = gspca_dev;
716 urb->transfer_buffer_length = bsize;
717 if (npkt != 0) { /* ISOC */
718 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
719 ep->desc.bEndpointAddress);
720 urb->transfer_flags = URB_ISO_ASAP
721 | URB_NO_TRANSFER_DMA_MAP;
722 urb->interval = 1 << (ep->desc.bInterval - 1);
723 urb->complete = isoc_irq;
724 urb->number_of_packets = npkt;
725 for (i = 0; i < npkt; i++) {
726 urb->iso_frame_desc[i].length = psize;
727 urb->iso_frame_desc[i].offset = psize * i;
730 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
731 ep->desc.bEndpointAddress);
732 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
733 urb->complete = bulk_irq;
739 /* Note: both the queue and the usb locks should be held when calling this */
740 static void gspca_stream_off(struct gspca_dev *gspca_dev)
742 gspca_dev->streaming = false;
743 gspca_dev->usb_err = 0;
744 if (gspca_dev->sd_desc->stopN)
745 gspca_dev->sd_desc->stopN(gspca_dev);
746 destroy_urbs(gspca_dev);
747 gspca_input_destroy_urb(gspca_dev);
748 gspca_set_alt0(gspca_dev);
749 if (gspca_dev->present)
750 gspca_input_create_urb(gspca_dev);
751 if (gspca_dev->sd_desc->stop0)
752 gspca_dev->sd_desc->stop0(gspca_dev);
753 gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n");
757 * start the USB transfer
759 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
761 struct usb_interface *intf;
762 struct usb_host_endpoint *ep;
764 struct ep_tb_s ep_tb[MAX_ALT];
765 int n, ret, xfer, alt, alt_idx;
767 /* reset the streaming variables */
768 gspca_dev->image = NULL;
769 gspca_dev->image_len = 0;
770 gspca_dev->last_packet_type = DISCARD_PACKET;
772 gspca_dev->usb_err = 0;
774 /* do the specific subdriver stuff before endpoint selection */
775 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
776 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
777 if (gspca_dev->sd_desc->isoc_init) {
778 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
782 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
783 : USB_ENDPOINT_XFER_ISOC;
785 /* if bulk or the subdriver forced an altsetting, get the endpoint */
786 if (gspca_dev->alt != 0) {
787 gspca_dev->alt--; /* (previous version compatibility) */
788 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
791 pr_err("bad altsetting %d\n", gspca_dev->alt);
794 ep_tb[0].alt = gspca_dev->alt;
797 /* else, compute the minimum bandwidth
798 * and build the endpoint table */
799 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
801 pr_err("no transfer endpoint found\n");
806 /* set the highest alternate setting and
807 * loop until urb submit succeeds */
808 gspca_input_destroy_urb(gspca_dev);
810 gspca_dev->alt = ep_tb[--alt_idx].alt;
813 if (alt != gspca_dev->alt) {
814 alt = gspca_dev->alt;
815 if (intf->num_altsetting > 1) {
816 ret = usb_set_interface(gspca_dev->dev,
821 goto retry; /*fixme: ugly*/
822 pr_err("set alt %d err %d\n", alt, ret);
827 if (!gspca_dev->cam.no_urb_create) {
828 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
830 ret = create_urbs(gspca_dev,
831 alt_xfer(&intf->altsetting[alt], xfer,
832 gspca_dev->xfer_ep));
834 destroy_urbs(gspca_dev);
839 /* clear the bulk endpoint */
840 if (gspca_dev->cam.bulk)
841 usb_clear_halt(gspca_dev->dev,
842 gspca_dev->urb[0]->pipe);
845 ret = gspca_dev->sd_desc->start(gspca_dev);
847 destroy_urbs(gspca_dev);
850 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
851 gspca_dev->streaming = true;
853 /* some bulk transfers are started by the subdriver */
854 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
857 /* submit the URBs */
858 for (n = 0; n < MAX_NURBS; n++) {
859 urb = gspca_dev->urb[n];
862 ret = usb_submit_urb(urb, GFP_KERNEL);
867 break; /* transfer is started */
869 /* something when wrong
870 * stop the webcam and free the transfer resources */
871 gspca_stream_off(gspca_dev);
872 if (ret != -ENOSPC) {
873 pr_err("usb_submit_urb alt %d err %d\n",
874 gspca_dev->alt, ret);
878 /* the bandwidth is not wide enough
879 * negotiate or try a lower alternate setting */
881 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
883 msleep(20); /* wait for kill complete */
884 if (gspca_dev->sd_desc->isoc_nego) {
885 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
890 pr_err("no transfer endpoint found\n");
894 gspca_dev->alt = ep_tb[--alt_idx].alt;
898 gspca_input_create_urb(gspca_dev);
902 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
906 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
907 gspca_dev->curr_mode = i;
908 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
910 /* does nothing if ctrl_handler == NULL */
911 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
914 static int wxh_to_mode(struct gspca_dev *gspca_dev,
915 int width, int height, u32 pixelformat)
919 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
920 if (width == gspca_dev->cam.cam_mode[i].width
921 && height == gspca_dev->cam.cam_mode[i].height
922 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
928 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
929 int width, int height, u32 pixelformat)
933 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
934 if (width >= gspca_dev->cam.cam_mode[i].width
935 && height >= gspca_dev->cam.cam_mode[i].height
936 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
939 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
940 if (width >= gspca_dev->cam.cam_mode[i].width
941 && height >= gspca_dev->cam.cam_mode[i].height)
948 * search a mode with the right pixel format
950 static int gspca_get_mode(struct gspca_dev *gspca_dev,
956 modeU = modeD = mode;
957 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
959 if (gspca_dev->cam.cam_mode[modeD].pixelformat
963 if (++modeU < gspca_dev->cam.nmodes) {
964 if (gspca_dev->cam.cam_mode[modeU].pixelformat
972 #ifdef CONFIG_VIDEO_ADV_DEBUG
973 static int vidioc_g_chip_info(struct file *file, void *priv,
974 struct v4l2_dbg_chip_info *chip)
976 struct gspca_dev *gspca_dev = video_drvdata(file);
978 gspca_dev->usb_err = 0;
979 if (gspca_dev->sd_desc->get_chip_info)
980 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
981 return chip->match.addr ? -EINVAL : 0;
984 static int vidioc_g_register(struct file *file, void *priv,
985 struct v4l2_dbg_register *reg)
987 struct gspca_dev *gspca_dev = video_drvdata(file);
989 gspca_dev->usb_err = 0;
990 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
993 static int vidioc_s_register(struct file *file, void *priv,
994 const struct v4l2_dbg_register *reg)
996 struct gspca_dev *gspca_dev = video_drvdata(file);
998 gspca_dev->usb_err = 0;
999 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
1003 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1004 struct v4l2_fmtdesc *fmtdesc)
1006 struct gspca_dev *gspca_dev = video_drvdata(file);
1010 /* give an index to each format */
1012 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1013 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1016 if (fmt_tb[j] == fmt_tb[index])
1021 if (fmtdesc->index == index)
1022 break; /* new format */
1024 if (index >= ARRAY_SIZE(fmt_tb))
1029 return -EINVAL; /* no more format */
1031 fmtdesc->pixelformat = fmt_tb[index];
1032 if (gspca_dev->cam.cam_mode[i].sizeimage <
1033 gspca_dev->cam.cam_mode[i].width *
1034 gspca_dev->cam.cam_mode[i].height)
1035 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1036 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1037 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1038 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1039 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1040 fmtdesc->description[4] = '\0';
1044 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1045 struct v4l2_format *fmt)
1047 struct gspca_dev *gspca_dev = video_drvdata(file);
1049 fmt->fmt.pix = gspca_dev->pixfmt;
1050 /* some drivers use priv internally, zero it before giving it back to
1052 fmt->fmt.pix.priv = 0;
1056 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1057 struct v4l2_format *fmt)
1059 int w, h, mode, mode2;
1061 w = fmt->fmt.pix.width;
1062 h = fmt->fmt.pix.height;
1064 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1065 fmt->fmt.pix.pixelformat, w, h);
1067 /* search the nearest mode for width and height */
1068 mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat);
1070 /* OK if right palette */
1071 if (gspca_dev->cam.cam_mode[mode].pixelformat
1072 != fmt->fmt.pix.pixelformat) {
1074 /* else, search the closest mode with the same pixel format */
1075 mode2 = gspca_get_mode(gspca_dev, mode,
1076 fmt->fmt.pix.pixelformat);
1080 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
1081 if (gspca_dev->sd_desc->try_fmt) {
1082 /* pass original resolution to subdriver try_fmt */
1083 fmt->fmt.pix.width = w;
1084 fmt->fmt.pix.height = h;
1085 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1087 /* some drivers use priv internally, zero it before giving it back to
1089 fmt->fmt.pix.priv = 0;
1090 return mode; /* used when s_fmt */
1093 static int vidioc_try_fmt_vid_cap(struct file *file,
1095 struct v4l2_format *fmt)
1097 struct gspca_dev *gspca_dev = video_drvdata(file);
1099 if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
1104 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1105 struct v4l2_format *fmt)
1107 struct gspca_dev *gspca_dev = video_drvdata(file);
1110 if (vb2_is_busy(&gspca_dev->queue))
1113 mode = try_fmt_vid_cap(gspca_dev, fmt);
1117 gspca_dev->curr_mode = mode;
1118 if (gspca_dev->sd_desc->try_fmt)
1119 /* subdriver try_fmt can modify format parameters */
1120 gspca_dev->pixfmt = fmt->fmt.pix;
1122 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1126 static int vidioc_enum_framesizes(struct file *file, void *priv,
1127 struct v4l2_frmsizeenum *fsize)
1129 struct gspca_dev *gspca_dev = video_drvdata(file);
1133 if (gspca_dev->sd_desc->enum_framesizes)
1134 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1136 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1137 if (fsize->pixel_format !=
1138 gspca_dev->cam.cam_mode[i].pixelformat)
1141 if (fsize->index == index) {
1142 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1143 fsize->discrete.width =
1144 gspca_dev->cam.cam_mode[i].width;
1145 fsize->discrete.height =
1146 gspca_dev->cam.cam_mode[i].height;
1155 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1156 struct v4l2_frmivalenum *fival)
1158 struct gspca_dev *gspca_dev = video_drvdata(filp);
1162 mode = wxh_to_mode(gspca_dev, fival->width, fival->height,
1163 fival->pixel_format);
1167 if (gspca_dev->cam.mode_framerates == NULL ||
1168 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1171 if (fival->pixel_format !=
1172 gspca_dev->cam.cam_mode[mode].pixelformat)
1175 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1176 if (fival->index == i) {
1177 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1178 fival->discrete.numerator = 1;
1179 fival->discrete.denominator =
1180 gspca_dev->cam.mode_framerates[mode].rates[i];
1188 static void gspca_release(struct v4l2_device *v4l2_device)
1190 struct gspca_dev *gspca_dev =
1191 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1193 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1194 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1195 kfree(gspca_dev->usb_buf);
1199 static int vidioc_querycap(struct file *file, void *priv,
1200 struct v4l2_capability *cap)
1202 struct gspca_dev *gspca_dev = video_drvdata(file);
1204 strscpy((char *)cap->driver, gspca_dev->sd_desc->name,
1205 sizeof(cap->driver));
1206 if (gspca_dev->dev->product != NULL) {
1207 strscpy((char *)cap->card, gspca_dev->dev->product,
1210 snprintf((char *) cap->card, sizeof cap->card,
1211 "USB Camera (%04x:%04x)",
1212 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1213 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1215 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1216 sizeof(cap->bus_info));
1217 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1218 | V4L2_CAP_STREAMING
1219 | V4L2_CAP_READWRITE;
1220 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1224 static int vidioc_enum_input(struct file *file, void *priv,
1225 struct v4l2_input *input)
1227 struct gspca_dev *gspca_dev = video_drvdata(file);
1229 if (input->index != 0)
1231 input->type = V4L2_INPUT_TYPE_CAMERA;
1232 input->status = gspca_dev->cam.input_flags;
1233 strscpy(input->name, gspca_dev->sd_desc->name,
1234 sizeof input->name);
1238 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1244 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1251 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1252 struct v4l2_jpegcompression *jpegcomp)
1254 struct gspca_dev *gspca_dev = video_drvdata(file);
1256 gspca_dev->usb_err = 0;
1257 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1260 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1261 const struct v4l2_jpegcompression *jpegcomp)
1263 struct gspca_dev *gspca_dev = video_drvdata(file);
1265 gspca_dev->usb_err = 0;
1266 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1269 static int vidioc_g_parm(struct file *filp, void *priv,
1270 struct v4l2_streamparm *parm)
1272 struct gspca_dev *gspca_dev = video_drvdata(filp);
1274 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1276 if (!gspca_dev->sd_desc->get_streamparm)
1279 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1280 gspca_dev->usb_err = 0;
1281 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1282 return gspca_dev->usb_err;
1285 static int vidioc_s_parm(struct file *filp, void *priv,
1286 struct v4l2_streamparm *parm)
1288 struct gspca_dev *gspca_dev = video_drvdata(filp);
1290 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
1292 if (!gspca_dev->sd_desc->set_streamparm) {
1293 parm->parm.capture.capability = 0;
1297 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1298 gspca_dev->usb_err = 0;
1299 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1300 return gspca_dev->usb_err;
1303 static int gspca_queue_setup(struct vb2_queue *vq,
1304 unsigned int *nbuffers, unsigned int *nplanes,
1305 unsigned int sizes[], struct device *alloc_devs[])
1307 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1308 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1311 return sizes[0] < size ? -EINVAL : 0;
1317 static int gspca_buffer_prepare(struct vb2_buffer *vb)
1319 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1320 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
1322 if (vb2_plane_size(vb, 0) < size) {
1323 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
1324 vb2_plane_size(vb, 0), size);
1330 static void gspca_buffer_finish(struct vb2_buffer *vb)
1332 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1334 if (!gspca_dev->sd_desc->dq_callback)
1337 gspca_dev->usb_err = 0;
1338 if (gspca_dev->present)
1339 gspca_dev->sd_desc->dq_callback(gspca_dev);
1342 static void gspca_buffer_queue(struct vb2_buffer *vb)
1344 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
1345 struct gspca_buffer *buf = to_gspca_buffer(vb);
1346 unsigned long flags;
1348 spin_lock_irqsave(&gspca_dev->qlock, flags);
1349 list_add_tail(&buf->list, &gspca_dev->buf_list);
1350 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1353 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
1354 enum vb2_buffer_state state)
1356 struct gspca_buffer *buf, *node;
1357 unsigned long flags;
1359 spin_lock_irqsave(&gspca_dev->qlock, flags);
1360 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
1361 vb2_buffer_done(&buf->vb.vb2_buf, state);
1362 list_del(&buf->list);
1364 spin_unlock_irqrestore(&gspca_dev->qlock, flags);
1367 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
1369 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1372 gspca_dev->sequence = 0;
1374 ret = gspca_init_transfer(gspca_dev);
1376 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
1380 static void gspca_stop_streaming(struct vb2_queue *vq)
1382 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
1384 gspca_stream_off(gspca_dev);
1386 /* Release all active buffers */
1387 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
1390 static const struct vb2_ops gspca_qops = {
1391 .queue_setup = gspca_queue_setup,
1392 .buf_prepare = gspca_buffer_prepare,
1393 .buf_finish = gspca_buffer_finish,
1394 .buf_queue = gspca_buffer_queue,
1395 .start_streaming = gspca_start_streaming,
1396 .stop_streaming = gspca_stop_streaming,
1397 .wait_prepare = vb2_ops_wait_prepare,
1398 .wait_finish = vb2_ops_wait_finish,
1401 static const struct v4l2_file_operations dev_fops = {
1402 .owner = THIS_MODULE,
1403 .open = v4l2_fh_open,
1404 .release = vb2_fop_release,
1405 .unlocked_ioctl = video_ioctl2,
1406 .read = vb2_fop_read,
1407 .mmap = vb2_fop_mmap,
1408 .poll = vb2_fop_poll,
1411 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
1412 .vidioc_querycap = vidioc_querycap,
1413 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1414 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1415 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1416 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1417 .vidioc_enum_input = vidioc_enum_input,
1418 .vidioc_g_input = vidioc_g_input,
1419 .vidioc_s_input = vidioc_s_input,
1420 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1421 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1422 .vidioc_g_parm = vidioc_g_parm,
1423 .vidioc_s_parm = vidioc_s_parm,
1424 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1425 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1427 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1428 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1429 .vidioc_querybuf = vb2_ioctl_querybuf,
1430 .vidioc_qbuf = vb2_ioctl_qbuf,
1431 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1432 .vidioc_expbuf = vb2_ioctl_expbuf,
1433 .vidioc_streamon = vb2_ioctl_streamon,
1434 .vidioc_streamoff = vb2_ioctl_streamoff,
1436 #ifdef CONFIG_VIDEO_ADV_DEBUG
1437 .vidioc_g_chip_info = vidioc_g_chip_info,
1438 .vidioc_g_register = vidioc_g_register,
1439 .vidioc_s_register = vidioc_s_register,
1441 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1442 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1445 static const struct video_device gspca_template = {
1446 .name = "gspca main driver",
1448 .ioctl_ops = &dev_ioctl_ops,
1449 .release = video_device_release_empty, /* We use v4l2_dev.release */
1453 * probe and create a new gspca device
1455 * This function must be called by the sub-driver when it is
1456 * called for probing a new device.
1458 int gspca_dev_probe2(struct usb_interface *intf,
1459 const struct usb_device_id *id,
1460 const struct sd_desc *sd_desc,
1462 struct module *module)
1464 struct gspca_dev *gspca_dev;
1465 struct usb_device *dev = interface_to_usbdev(intf);
1466 struct vb2_queue *q;
1469 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
1470 sd_desc->name, id->idVendor, id->idProduct);
1472 /* create the device */
1473 if (dev_size < sizeof *gspca_dev)
1474 dev_size = sizeof *gspca_dev;
1475 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
1477 pr_err("couldn't kzalloc gspca struct\n");
1480 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
1481 if (!gspca_dev->usb_buf) {
1482 pr_err("out of memory\n");
1486 gspca_dev->dev = dev;
1487 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
1488 gspca_dev->xfer_ep = -1;
1490 /* check if any audio device */
1491 if (dev->actconfig->desc.bNumInterfaces != 1) {
1493 struct usb_interface *intf2;
1495 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
1496 intf2 = dev->actconfig->interface[i];
1498 && intf2->altsetting != NULL
1499 && intf2->altsetting->desc.bInterfaceClass ==
1501 gspca_dev->audio = 1;
1507 gspca_dev->v4l2_dev.release = gspca_release;
1508 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
1511 gspca_dev->present = true;
1512 gspca_dev->sd_desc = sd_desc;
1513 gspca_dev->empty_packet = -1; /* don't check the empty packets */
1514 gspca_dev->vdev = gspca_template;
1515 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1516 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
1517 gspca_dev->module = module;
1519 mutex_init(&gspca_dev->usb_lock);
1520 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
1521 init_waitqueue_head(&gspca_dev->wq);
1523 /* Initialize the vb2 queue */
1524 q = &gspca_dev->queue;
1525 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1526 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1527 q->drv_priv = gspca_dev;
1528 q->buf_struct_size = sizeof(struct gspca_buffer);
1529 q->ops = &gspca_qops;
1530 q->mem_ops = &vb2_vmalloc_memops;
1531 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1532 q->min_buffers_needed = 2;
1533 q->lock = &gspca_dev->usb_lock;
1534 ret = vb2_queue_init(q);
1537 gspca_dev->vdev.queue = q;
1539 INIT_LIST_HEAD(&gspca_dev->buf_list);
1540 spin_lock_init(&gspca_dev->qlock);
1542 /* configure the subdriver and initialize the USB device */
1543 ret = sd_desc->config(gspca_dev, id);
1546 ret = sd_desc->init(gspca_dev);
1549 if (sd_desc->init_controls)
1550 ret = sd_desc->init_controls(gspca_dev);
1553 gspca_set_default_mode(gspca_dev);
1555 ret = gspca_input_connect(gspca_dev);
1559 #ifdef CONFIG_VIDEO_ADV_DEBUG
1560 if (!gspca_dev->sd_desc->get_register)
1561 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
1562 if (!gspca_dev->sd_desc->set_register)
1563 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
1565 if (!gspca_dev->sd_desc->get_jcomp)
1566 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
1567 if (!gspca_dev->sd_desc->set_jcomp)
1568 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
1570 /* init video stuff */
1571 ret = video_register_device(&gspca_dev->vdev,
1575 pr_err("video_register_device err %d\n", ret);
1579 usb_set_intfdata(intf, gspca_dev);
1580 gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
1581 video_device_node_name(&gspca_dev->vdev));
1583 gspca_input_create_urb(gspca_dev);
1587 #if IS_ENABLED(CONFIG_INPUT)
1588 if (gspca_dev->input_dev)
1589 input_unregister_device(gspca_dev->input_dev);
1591 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1592 kfree(gspca_dev->usb_buf);
1596 EXPORT_SYMBOL(gspca_dev_probe2);
1598 /* same function as the previous one, but check the interface */
1599 int gspca_dev_probe(struct usb_interface *intf,
1600 const struct usb_device_id *id,
1601 const struct sd_desc *sd_desc,
1603 struct module *module)
1605 struct usb_device *dev = interface_to_usbdev(intf);
1607 /* we don't handle multi-config cameras */
1608 if (dev->descriptor.bNumConfigurations != 1) {
1609 pr_err("%04x:%04x too many config\n",
1610 id->idVendor, id->idProduct);
1614 /* the USB video interface must be the first one */
1615 if (dev->actconfig->desc.bNumInterfaces != 1
1616 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
1619 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
1621 EXPORT_SYMBOL(gspca_dev_probe);
1626 * This function must be called by the sub-driver
1627 * when the device disconnects, after the specific resources are freed.
1629 void gspca_disconnect(struct usb_interface *intf)
1631 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1632 #if IS_ENABLED(CONFIG_INPUT)
1633 struct input_dev *input_dev;
1636 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
1637 video_device_node_name(&gspca_dev->vdev));
1639 mutex_lock(&gspca_dev->usb_lock);
1640 gspca_dev->present = false;
1642 vb2_queue_error(&gspca_dev->queue);
1644 #if IS_ENABLED(CONFIG_INPUT)
1645 input_dev = gspca_dev->input_dev;
1647 gspca_dev->input_dev = NULL;
1648 input_unregister_device(input_dev);
1652 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
1653 video_unregister_device(&gspca_dev->vdev);
1655 mutex_unlock(&gspca_dev->usb_lock);
1657 /* (this will call gspca_release() immediately or on last close) */
1658 v4l2_device_put(&gspca_dev->v4l2_dev);
1660 EXPORT_SYMBOL(gspca_disconnect);
1663 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1665 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1667 gspca_input_destroy_urb(gspca_dev);
1669 if (!vb2_start_streaming_called(&gspca_dev->queue))
1672 mutex_lock(&gspca_dev->usb_lock);
1673 gspca_dev->frozen = 1; /* avoid urb error messages */
1674 gspca_dev->usb_err = 0;
1675 if (gspca_dev->sd_desc->stopN)
1676 gspca_dev->sd_desc->stopN(gspca_dev);
1677 destroy_urbs(gspca_dev);
1678 gspca_set_alt0(gspca_dev);
1679 if (gspca_dev->sd_desc->stop0)
1680 gspca_dev->sd_desc->stop0(gspca_dev);
1681 mutex_unlock(&gspca_dev->usb_lock);
1685 EXPORT_SYMBOL(gspca_suspend);
1687 int gspca_resume(struct usb_interface *intf)
1689 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1690 int streaming, ret = 0;
1692 mutex_lock(&gspca_dev->usb_lock);
1693 gspca_dev->frozen = 0;
1694 gspca_dev->usb_err = 0;
1695 gspca_dev->sd_desc->init(gspca_dev);
1697 * Most subdrivers send all ctrl values on sd_start and thus
1698 * only write to the device registers on s_ctrl when streaming ->
1699 * Clear streaming to avoid setting all ctrls twice.
1701 streaming = vb2_start_streaming_called(&gspca_dev->queue);
1703 ret = gspca_init_transfer(gspca_dev);
1705 gspca_input_create_urb(gspca_dev);
1706 mutex_unlock(&gspca_dev->usb_lock);
1710 EXPORT_SYMBOL(gspca_resume);
1713 /* -- module insert / remove -- */
1714 static int __init gspca_init(void)
1716 pr_info("v" GSPCA_VERSION " registered\n");
1719 static void __exit gspca_exit(void)
1723 module_init(gspca_init);
1724 module_exit(gspca_exit);
1726 module_param_named(debug, gspca_debug, int, 0644);
1727 MODULE_PARM_DESC(debug,
1728 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");