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
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26 #define GSPCA_VERSION "2.14.0"
28 #include <linux/init.h>
30 #include <linux/vmalloc.h>
31 #include <linux/sched.h>
32 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/pagemap.h>
38 #include <linux/uaccess.h>
39 #include <linux/ktime.h>
40 #include <media/v4l2-ioctl.h>
41 #include <media/v4l2-ctrls.h>
42 #include <media/v4l2-fh.h>
43 #include <media/v4l2-event.h>
47 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
48 #include <linux/input.h>
49 #include <linux/usb/input.h>
53 #define DEF_NURBS 3 /* default number of URBs */
54 #if DEF_NURBS > MAX_NURBS
55 #error "DEF_NURBS too big"
58 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
59 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
60 MODULE_LICENSE("GPL");
61 MODULE_VERSION(GSPCA_VERSION);
64 int gspca_debug = D_ERR | D_PROBE;
65 EXPORT_SYMBOL(gspca_debug);
67 static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
69 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
70 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
74 (pixfmt >> 16) & 0xff,
78 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
85 #define PDEBUG_MODE(txt, pixfmt, w, h)
88 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
89 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
90 #define GSPCA_MEMORY_READ 7
92 #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
97 static void gspca_vm_open(struct vm_area_struct *vma)
99 struct gspca_frame *frame = vma->vm_private_data;
101 frame->vma_use_count++;
102 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
105 static void gspca_vm_close(struct vm_area_struct *vma)
107 struct gspca_frame *frame = vma->vm_private_data;
109 if (--frame->vma_use_count <= 0)
110 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
113 static const struct vm_operations_struct gspca_vm_ops = {
114 .open = gspca_vm_open,
115 .close = gspca_vm_close,
119 * Input and interrupt endpoint handling functions
121 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
122 static void int_irq(struct urb *urb)
124 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
130 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
131 urb->transfer_buffer, urb->actual_length) < 0) {
132 PDEBUG(D_ERR, "Unknown packet received");
140 /* Stop is requested either by software or hardware is gone,
141 * keep the ret value non-zero and don't resubmit later.
146 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
152 ret = usb_submit_urb(urb, GFP_ATOMIC);
154 pr_err("Resubmit URB failed with error %i\n", ret);
158 static int gspca_input_connect(struct gspca_dev *dev)
160 struct input_dev *input_dev;
163 dev->input_dev = NULL;
164 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
165 input_dev = input_allocate_device();
169 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
170 strlcat(dev->phys, "/input0", sizeof(dev->phys));
172 input_dev->name = dev->sd_desc->name;
173 input_dev->phys = dev->phys;
175 usb_to_input_id(dev->dev, &input_dev->id);
177 input_dev->evbit[0] = BIT_MASK(EV_KEY);
178 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
179 input_dev->dev.parent = &dev->dev->dev;
181 err = input_register_device(input_dev);
183 pr_err("Input device registration failed with error %i\n",
185 input_dev->dev.parent = NULL;
186 input_free_device(input_dev);
188 dev->input_dev = input_dev;
195 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
196 struct usb_endpoint_descriptor *ep)
198 unsigned int buffer_len;
201 struct usb_device *dev;
205 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
206 interval = ep->bInterval;
207 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
208 "buffer_len=%u, interval=%u",
209 ep->bEndpointAddress, buffer_len, interval);
211 dev = gspca_dev->dev;
213 urb = usb_alloc_urb(0, GFP_KERNEL);
219 buffer = usb_alloc_coherent(dev, buffer_len,
220 GFP_KERNEL, &urb->transfer_dma);
225 usb_fill_int_urb(urb, dev,
226 usb_rcvintpipe(dev, ep->bEndpointAddress),
228 int_irq, (void *)gspca_dev, interval);
229 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
230 ret = usb_submit_urb(urb, GFP_KERNEL);
232 PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
235 gspca_dev->int_urb = urb;
239 usb_free_coherent(dev,
240 urb->transfer_buffer_length,
241 urb->transfer_buffer,
249 static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
251 struct usb_interface *intf;
252 struct usb_host_interface *intf_desc;
253 struct usb_endpoint_descriptor *ep;
256 if (gspca_dev->sd_desc->int_pkt_scan) {
257 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
258 intf_desc = intf->cur_altsetting;
259 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
260 ep = &intf_desc->endpoint[i].desc;
261 if (usb_endpoint_dir_in(ep) &&
262 usb_endpoint_xfer_int(ep)) {
264 alloc_and_submit_int_urb(gspca_dev, ep);
271 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
275 urb = gspca_dev->int_urb;
277 gspca_dev->int_urb = NULL;
279 usb_free_coherent(gspca_dev->dev,
280 urb->transfer_buffer_length,
281 urb->transfer_buffer,
287 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
291 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
295 static inline int gspca_input_connect(struct gspca_dev *dev)
302 * fill a video frame from an URB and resubmit
304 static void fill_frame(struct gspca_dev *gspca_dev,
307 u8 *data; /* address of data in the iso message */
311 if (urb->status != 0) {
312 if (urb->status == -ESHUTDOWN)
313 return; /* disconnection */
315 if (gspca_dev->frozen)
318 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
322 pkt_scan = gspca_dev->sd_desc->pkt_scan;
323 for (i = 0; i < urb->number_of_packets; i++) {
324 len = urb->iso_frame_desc[i].actual_length;
326 /* check the packet status and length */
327 st = urb->iso_frame_desc[i].status;
329 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
331 gspca_dev->last_packet_type = DISCARD_PACKET;
335 if (gspca_dev->empty_packet == 0)
336 gspca_dev->empty_packet = 1;
340 /* let the packet be analyzed by the subdriver */
341 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
342 i, urb->iso_frame_desc[i].offset, len);
343 data = (u8 *) urb->transfer_buffer
344 + urb->iso_frame_desc[i].offset;
345 pkt_scan(gspca_dev, data, len);
349 /* resubmit the URB */
350 st = usb_submit_urb(urb, GFP_ATOMIC);
352 pr_err("usb_submit_urb() ret %d\n", st);
356 * ISOC message interrupt from the USB device
358 * Analyse each packet and call the subdriver for copy to the frame buffer.
360 static void isoc_irq(struct urb *urb)
362 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
364 PDEBUG(D_PACK, "isoc irq");
365 if (!gspca_dev->streaming)
367 fill_frame(gspca_dev, urb);
371 * bulk message interrupt from the USB device
373 static void bulk_irq(struct urb *urb)
375 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
378 PDEBUG(D_PACK, "bulk irq");
379 if (!gspca_dev->streaming)
381 switch (urb->status) {
385 return; /* disconnection */
388 if (gspca_dev->frozen)
391 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
396 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
397 gspca_dev->sd_desc->pkt_scan(gspca_dev,
398 urb->transfer_buffer,
402 /* resubmit the URB */
403 if (gspca_dev->cam.bulk_nurbs != 0) {
404 st = usb_submit_urb(urb, GFP_ATOMIC);
406 pr_err("usb_submit_urb() ret %d\n", st);
411 * add data to the current frame
413 * This function is called by the subdrivers at interrupt level.
415 * To build a frame, these ones must add
417 * - 0 or many INTER_PACKETs
419 * DISCARD_PACKET invalidates the whole frame.
421 void gspca_frame_add(struct gspca_dev *gspca_dev,
422 enum gspca_packet_type packet_type,
426 struct gspca_frame *frame;
429 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
431 if (packet_type == FIRST_PACKET) {
432 i = atomic_read(&gspca_dev->fr_i);
434 /* if there are no queued buffer, discard the whole frame */
435 if (i == atomic_read(&gspca_dev->fr_q)) {
436 gspca_dev->last_packet_type = DISCARD_PACKET;
437 gspca_dev->sequence++;
440 j = gspca_dev->fr_queue[i];
441 frame = &gspca_dev->frame[j];
442 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
443 frame->v4l2_buf.sequence = gspca_dev->sequence++;
444 gspca_dev->image = frame->data;
445 gspca_dev->image_len = 0;
447 switch (gspca_dev->last_packet_type) {
449 if (packet_type == LAST_PACKET) {
450 gspca_dev->last_packet_type = packet_type;
451 gspca_dev->image = NULL;
452 gspca_dev->image_len = 0;
460 /* append the packet to the frame buffer */
462 if (gspca_dev->image_len + len > gspca_dev->frsz) {
463 PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
464 gspca_dev->image_len + len,
466 packet_type = DISCARD_PACKET;
468 /* !! image is NULL only when last pkt is LAST or DISCARD
469 if (gspca_dev->image == NULL) {
470 pr_err("gspca_frame_add() image == NULL\n");
474 memcpy(gspca_dev->image + gspca_dev->image_len,
476 gspca_dev->image_len += len;
479 gspca_dev->last_packet_type = packet_type;
481 /* if last packet, invalidate packet concatenation until
482 * next first packet, wake up the application and advance
484 if (packet_type == LAST_PACKET) {
485 i = atomic_read(&gspca_dev->fr_i);
486 j = gspca_dev->fr_queue[i];
487 frame = &gspca_dev->frame[j];
488 frame->v4l2_buf.bytesused = gspca_dev->image_len;
489 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
490 | V4L2_BUF_FLAG_DONE)
491 & ~V4L2_BUF_FLAG_QUEUED;
492 i = (i + 1) % GSPCA_MAX_FRAMES;
493 atomic_set(&gspca_dev->fr_i, i);
494 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
495 PDEBUG(D_FRAM, "frame complete len:%d",
496 frame->v4l2_buf.bytesused);
497 gspca_dev->image = NULL;
498 gspca_dev->image_len = 0;
501 EXPORT_SYMBOL(gspca_frame_add);
503 static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
504 enum v4l2_memory memory, unsigned int count)
506 struct gspca_frame *frame;
510 i = gspca_dev->curr_mode;
511 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
512 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
513 frsz = PAGE_ALIGN(frsz);
514 if (count >= GSPCA_MAX_FRAMES)
515 count = GSPCA_MAX_FRAMES - 1;
516 gspca_dev->frbuf = vmalloc_32(frsz * count);
517 if (!gspca_dev->frbuf) {
518 pr_err("frame alloc failed\n");
521 gspca_dev->capt_file = file;
522 gspca_dev->memory = memory;
523 gspca_dev->frsz = frsz;
524 gspca_dev->nframes = count;
525 for (i = 0; i < count; i++) {
526 frame = &gspca_dev->frame[i];
527 frame->v4l2_buf.index = i;
528 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
529 frame->v4l2_buf.flags = 0;
530 frame->v4l2_buf.field = V4L2_FIELD_NONE;
531 frame->v4l2_buf.length = frsz;
532 frame->v4l2_buf.memory = memory;
533 frame->v4l2_buf.sequence = 0;
534 frame->data = gspca_dev->frbuf + i * frsz;
535 frame->v4l2_buf.m.offset = i * frsz;
537 atomic_set(&gspca_dev->fr_q, 0);
538 atomic_set(&gspca_dev->fr_i, 0);
543 static void frame_free(struct gspca_dev *gspca_dev)
547 PDEBUG(D_STREAM, "frame free");
548 if (gspca_dev->frbuf != NULL) {
549 vfree(gspca_dev->frbuf);
550 gspca_dev->frbuf = NULL;
551 for (i = 0; i < gspca_dev->nframes; i++)
552 gspca_dev->frame[i].data = NULL;
554 gspca_dev->nframes = 0;
556 gspca_dev->capt_file = NULL;
557 gspca_dev->memory = GSPCA_MEMORY_NO;
560 static void destroy_urbs(struct gspca_dev *gspca_dev)
565 PDEBUG(D_STREAM, "kill transfer");
566 for (i = 0; i < MAX_NURBS; i++) {
567 urb = gspca_dev->urb[i];
571 gspca_dev->urb[i] = NULL;
573 if (urb->transfer_buffer != NULL)
574 usb_free_coherent(gspca_dev->dev,
575 urb->transfer_buffer_length,
576 urb->transfer_buffer,
582 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
586 if (gspca_dev->alt == 0)
588 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
590 pr_err("set alt 0 err %d\n", ret);
594 /* Note: both the queue and the usb locks should be held when calling this */
595 static void gspca_stream_off(struct gspca_dev *gspca_dev)
597 gspca_dev->streaming = 0;
598 gspca_dev->usb_err = 0;
599 if (gspca_dev->sd_desc->stopN)
600 gspca_dev->sd_desc->stopN(gspca_dev);
601 destroy_urbs(gspca_dev);
602 gspca_input_destroy_urb(gspca_dev);
603 gspca_set_alt0(gspca_dev);
604 gspca_input_create_urb(gspca_dev);
605 if (gspca_dev->sd_desc->stop0)
606 gspca_dev->sd_desc->stop0(gspca_dev);
607 PDEBUG(D_STREAM, "stream off OK");
611 * look for an input transfer endpoint in an alternate setting
613 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
616 struct usb_host_endpoint *ep;
619 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
620 ep = &alt->endpoint[i];
621 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
623 && ep->desc.wMaxPacketSize != 0
624 && usb_endpoint_dir_in(&ep->desc))
630 /* compute the minimum bandwidth for the current transfer */
631 static u32 which_bandwidth(struct gspca_dev *gspca_dev)
636 /* get the (max) image size */
637 i = gspca_dev->curr_mode;
638 bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
640 /* if the image is compressed, estimate its mean size */
641 if (!gspca_dev->cam.needs_full_bandwidth &&
642 bandwidth < gspca_dev->cam.cam_mode[i].width *
643 gspca_dev->cam.cam_mode[i].height)
644 bandwidth = bandwidth * 3 / 8; /* 0.375 */
646 /* estimate the frame rate */
647 if (gspca_dev->sd_desc->get_streamparm) {
648 struct v4l2_streamparm parm;
650 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
651 bandwidth *= parm.parm.capture.timeperframe.denominator;
652 bandwidth /= parm.parm.capture.timeperframe.numerator;
655 /* don't hope more than 15 fps with USB 1.1 and
656 * image resolution >= 640x480 */
657 if (gspca_dev->width >= 640
658 && gspca_dev->dev->speed == USB_SPEED_FULL)
659 bandwidth *= 15; /* 15 fps */
661 bandwidth *= 30; /* 30 fps */
664 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
676 * build the table of the endpoints
677 * and compute the minimum bandwidth for the image transfer
679 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
680 struct usb_interface *intf,
681 struct ep_tb_s *ep_tb)
683 struct usb_host_endpoint *ep;
684 int i, j, nbalt, psize, found;
685 u32 bandwidth, last_bw;
687 nbalt = intf->num_altsetting;
689 nbalt = MAX_ALT; /* fixme: should warn */
691 /* build the endpoint table */
695 ep_tb->bandwidth = 2000 * 2000 * 120;
697 for (j = 0; j < nbalt; j++) {
698 ep = alt_xfer(&intf->altsetting[j],
699 USB_ENDPOINT_XFER_ISOC);
702 if (ep->desc.bInterval == 0) {
703 pr_err("alt %d iso endp with 0 interval\n", j);
706 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
707 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
708 bandwidth = psize * 1000;
709 if (gspca_dev->dev->speed == USB_SPEED_HIGH
710 || gspca_dev->dev->speed == USB_SPEED_SUPER)
712 bandwidth /= 1 << (ep->desc.bInterval - 1);
713 if (bandwidth <= last_bw)
715 if (bandwidth < ep_tb->bandwidth) {
716 ep_tb->bandwidth = bandwidth;
723 PDEBUG(D_STREAM, "alt %d bandwidth %d",
724 ep_tb->alt, ep_tb->bandwidth);
725 last_bw = ep_tb->bandwidth;
732 * has a usb audio class interface (a built in usb mic); and
733 * is a usb 1 full speed device; and
734 * uses the max full speed iso bandwidth; and
735 * and has more than 1 alt setting
736 * then skip the highest alt setting to spare bandwidth for the mic
738 if (gspca_dev->audio &&
739 gspca_dev->dev->speed == USB_SPEED_FULL &&
740 last_bw >= 1000000 &&
742 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
747 /* get the requested bandwidth and start at the highest atlsetting */
748 bandwidth = which_bandwidth(gspca_dev);
752 if (ep_tb->bandwidth < bandwidth)
760 * create the URBs for image transfer
762 static int create_urbs(struct gspca_dev *gspca_dev,
763 struct usb_host_endpoint *ep)
766 int n, nurbs, i, psize, npkt, bsize;
768 /* calculate the packet size and the number of packets */
769 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
771 if (!gspca_dev->cam.bulk) { /* isoc */
773 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
774 if (gspca_dev->pkt_size == 0)
775 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
777 psize = gspca_dev->pkt_size;
778 npkt = gspca_dev->cam.npkt;
780 npkt = 32; /* default value */
781 bsize = psize * npkt;
783 "isoc %d pkts size %d = bsize:%d",
788 bsize = gspca_dev->cam.bulk_size;
791 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
792 if (gspca_dev->cam.bulk_nurbs != 0)
793 nurbs = gspca_dev->cam.bulk_nurbs;
798 for (n = 0; n < nurbs; n++) {
799 urb = usb_alloc_urb(npkt, GFP_KERNEL);
801 pr_err("usb_alloc_urb failed\n");
804 gspca_dev->urb[n] = urb;
805 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
810 if (urb->transfer_buffer == NULL) {
811 pr_err("usb_alloc_coherent failed\n");
814 urb->dev = gspca_dev->dev;
815 urb->context = gspca_dev;
816 urb->transfer_buffer_length = bsize;
817 if (npkt != 0) { /* ISOC */
818 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
819 ep->desc.bEndpointAddress);
820 urb->transfer_flags = URB_ISO_ASAP
821 | URB_NO_TRANSFER_DMA_MAP;
822 urb->interval = 1 << (ep->desc.bInterval - 1);
823 urb->complete = isoc_irq;
824 urb->number_of_packets = npkt;
825 for (i = 0; i < npkt; i++) {
826 urb->iso_frame_desc[i].length = psize;
827 urb->iso_frame_desc[i].offset = psize * i;
830 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
831 ep->desc.bEndpointAddress);
832 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
833 urb->complete = bulk_irq;
840 * start the USB transfer
842 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
844 struct usb_interface *intf;
845 struct usb_host_endpoint *ep;
847 struct ep_tb_s ep_tb[MAX_ALT];
848 int n, ret, xfer, alt, alt_idx;
850 /* reset the streaming variables */
851 gspca_dev->image = NULL;
852 gspca_dev->image_len = 0;
853 gspca_dev->last_packet_type = DISCARD_PACKET;
854 gspca_dev->sequence = 0;
856 gspca_dev->usb_err = 0;
858 /* do the specific subdriver stuff before endpoint selection */
859 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
860 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
861 if (gspca_dev->sd_desc->isoc_init) {
862 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
866 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
867 : USB_ENDPOINT_XFER_ISOC;
869 /* if bulk or the subdriver forced an altsetting, get the endpoint */
870 if (gspca_dev->alt != 0) {
871 gspca_dev->alt--; /* (previous version compatibility) */
872 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
874 pr_err("bad altsetting %d\n", gspca_dev->alt);
877 ep_tb[0].alt = gspca_dev->alt;
881 /* else, compute the minimum bandwidth
882 * and build the endpoint table */
883 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
885 pr_err("no transfer endpoint found\n");
890 /* set the highest alternate setting and
891 * loop until urb submit succeeds */
892 gspca_input_destroy_urb(gspca_dev);
894 gspca_dev->alt = ep_tb[--alt_idx].alt;
897 if (alt != gspca_dev->alt) {
898 alt = gspca_dev->alt;
899 if (intf->num_altsetting > 1) {
900 ret = usb_set_interface(gspca_dev->dev,
905 goto retry; /*fixme: ugly*/
906 pr_err("set alt %d err %d\n", alt, ret);
911 if (!gspca_dev->cam.no_urb_create) {
912 PDEBUG(D_STREAM, "init transfer alt %d", alt);
913 ret = create_urbs(gspca_dev,
914 alt_xfer(&intf->altsetting[alt], xfer));
916 destroy_urbs(gspca_dev);
921 /* clear the bulk endpoint */
922 if (gspca_dev->cam.bulk)
923 usb_clear_halt(gspca_dev->dev,
924 gspca_dev->urb[0]->pipe);
927 ret = gspca_dev->sd_desc->start(gspca_dev);
929 destroy_urbs(gspca_dev);
932 gspca_dev->streaming = 1;
934 /* some bulk transfers are started by the subdriver */
935 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
938 /* submit the URBs */
939 for (n = 0; n < MAX_NURBS; n++) {
940 urb = gspca_dev->urb[n];
943 ret = usb_submit_urb(urb, GFP_KERNEL);
948 break; /* transfer is started */
950 /* something when wrong
951 * stop the webcam and free the transfer resources */
952 gspca_stream_off(gspca_dev);
953 if (ret != -ENOSPC) {
954 pr_err("usb_submit_urb alt %d err %d\n",
955 gspca_dev->alt, ret);
959 /* the bandwidth is not wide enough
960 * negotiate or try a lower alternate setting */
962 PDEBUG(D_ERR|D_STREAM,
963 "alt %d - bandwidth not wide enough - trying again",
965 msleep(20); /* wait for kill complete */
966 if (gspca_dev->sd_desc->isoc_nego) {
967 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
972 pr_err("no transfer endpoint found\n");
976 gspca_dev->alt = ep_tb[--alt_idx].alt;
980 gspca_input_create_urb(gspca_dev);
984 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
986 struct gspca_ctrl *ctrl;
989 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
990 gspca_dev->curr_mode = i;
991 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
992 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
993 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
995 /* set the current control values to their default values
996 * which may have changed in sd_init() */
997 /* does nothing if ctrl_handler == NULL */
998 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
999 ctrl = gspca_dev->cam.ctrls;
1002 i < gspca_dev->sd_desc->nctrls;
1004 ctrl->val = ctrl->def;
1008 static int wxh_to_mode(struct gspca_dev *gspca_dev,
1009 int width, int height)
1013 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
1014 if (width >= gspca_dev->cam.cam_mode[i].width
1015 && height >= gspca_dev->cam.cam_mode[i].height)
1022 * search a mode with the right pixel format
1024 static int gspca_get_mode(struct gspca_dev *gspca_dev,
1030 modeU = modeD = mode;
1031 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1033 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1037 if (++modeU < gspca_dev->cam.nmodes) {
1038 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1046 #ifdef CONFIG_VIDEO_ADV_DEBUG
1047 static int vidioc_g_register(struct file *file, void *priv,
1048 struct v4l2_dbg_register *reg)
1050 struct gspca_dev *gspca_dev = video_drvdata(file);
1052 if (!gspca_dev->sd_desc->get_chip_ident)
1055 if (!gspca_dev->sd_desc->get_register)
1058 gspca_dev->usb_err = 0;
1059 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
1062 static int vidioc_s_register(struct file *file, void *priv,
1063 struct v4l2_dbg_register *reg)
1065 struct gspca_dev *gspca_dev = video_drvdata(file);
1067 if (!gspca_dev->sd_desc->get_chip_ident)
1070 if (!gspca_dev->sd_desc->set_register)
1073 gspca_dev->usb_err = 0;
1074 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
1078 static int vidioc_g_chip_ident(struct file *file, void *priv,
1079 struct v4l2_dbg_chip_ident *chip)
1081 struct gspca_dev *gspca_dev = video_drvdata(file);
1083 if (!gspca_dev->sd_desc->get_chip_ident)
1086 gspca_dev->usb_err = 0;
1087 return gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1090 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1091 struct v4l2_fmtdesc *fmtdesc)
1093 struct gspca_dev *gspca_dev = video_drvdata(file);
1097 /* give an index to each format */
1100 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1101 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1104 if (fmt_tb[j] == fmt_tb[index])
1109 if (fmtdesc->index == index)
1110 break; /* new format */
1112 if (index >= ARRAY_SIZE(fmt_tb))
1117 return -EINVAL; /* no more format */
1119 fmtdesc->pixelformat = fmt_tb[index];
1120 if (gspca_dev->cam.cam_mode[i].sizeimage <
1121 gspca_dev->cam.cam_mode[i].width *
1122 gspca_dev->cam.cam_mode[i].height)
1123 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1124 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1125 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1126 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1127 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1128 fmtdesc->description[4] = '\0';
1132 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1133 struct v4l2_format *fmt)
1135 struct gspca_dev *gspca_dev = video_drvdata(file);
1138 mode = gspca_dev->curr_mode;
1139 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1140 sizeof fmt->fmt.pix);
1144 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1145 struct v4l2_format *fmt)
1147 int w, h, mode, mode2;
1149 w = fmt->fmt.pix.width;
1150 h = fmt->fmt.pix.height;
1153 if (gspca_debug & D_CONF)
1154 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1156 /* search the closest mode for width and height */
1157 mode = wxh_to_mode(gspca_dev, w, h);
1159 /* OK if right palette */
1160 if (gspca_dev->cam.cam_mode[mode].pixelformat
1161 != fmt->fmt.pix.pixelformat) {
1163 /* else, search the closest mode with the same pixel format */
1164 mode2 = gspca_get_mode(gspca_dev, mode,
1165 fmt->fmt.pix.pixelformat);
1169 ; * no chance, return this mode */
1171 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1172 sizeof fmt->fmt.pix);
1173 return mode; /* used when s_fmt */
1176 static int vidioc_try_fmt_vid_cap(struct file *file,
1178 struct v4l2_format *fmt)
1180 struct gspca_dev *gspca_dev = video_drvdata(file);
1183 ret = try_fmt_vid_cap(gspca_dev, fmt);
1189 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1190 struct v4l2_format *fmt)
1192 struct gspca_dev *gspca_dev = video_drvdata(file);
1195 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1196 return -ERESTARTSYS;
1198 ret = try_fmt_vid_cap(gspca_dev, fmt);
1202 if (gspca_dev->nframes != 0
1203 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1208 if (ret == gspca_dev->curr_mode) {
1210 goto out; /* same mode */
1213 if (gspca_dev->streaming) {
1217 gspca_dev->width = fmt->fmt.pix.width;
1218 gspca_dev->height = fmt->fmt.pix.height;
1219 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1220 gspca_dev->curr_mode = ret;
1224 mutex_unlock(&gspca_dev->queue_lock);
1228 static int vidioc_enum_framesizes(struct file *file, void *priv,
1229 struct v4l2_frmsizeenum *fsize)
1231 struct gspca_dev *gspca_dev = video_drvdata(file);
1235 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1236 if (fsize->pixel_format !=
1237 gspca_dev->cam.cam_mode[i].pixelformat)
1240 if (fsize->index == index) {
1241 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1242 fsize->discrete.width =
1243 gspca_dev->cam.cam_mode[i].width;
1244 fsize->discrete.height =
1245 gspca_dev->cam.cam_mode[i].height;
1254 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1255 struct v4l2_frmivalenum *fival)
1257 struct gspca_dev *gspca_dev = video_drvdata(filp);
1258 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1261 if (gspca_dev->cam.mode_framerates == NULL ||
1262 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1265 if (fival->pixel_format !=
1266 gspca_dev->cam.cam_mode[mode].pixelformat)
1269 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1270 if (fival->index == i) {
1271 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1272 fival->discrete.numerator = 1;
1273 fival->discrete.denominator =
1274 gspca_dev->cam.mode_framerates[mode].rates[i];
1282 static void gspca_release(struct v4l2_device *v4l2_device)
1284 struct gspca_dev *gspca_dev =
1285 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
1287 PDEBUG(D_PROBE, "%s released",
1288 video_device_node_name(&gspca_dev->vdev));
1290 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
1291 v4l2_device_unregister(&gspca_dev->v4l2_dev);
1292 kfree(gspca_dev->usb_buf);
1296 static int dev_open(struct file *file)
1298 struct gspca_dev *gspca_dev = video_drvdata(file);
1300 PDEBUG(D_STREAM, "[%s] open", current->comm);
1302 /* protect the subdriver against rmmod */
1303 if (!try_module_get(gspca_dev->module))
1307 /* activate the v4l2 debug */
1308 if (gspca_debug & D_V4L2)
1309 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
1310 | V4L2_DEBUG_IOCTL_ARG;
1312 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
1313 | V4L2_DEBUG_IOCTL_ARG);
1315 return v4l2_fh_open(file);
1318 static int dev_close(struct file *file)
1320 struct gspca_dev *gspca_dev = video_drvdata(file);
1322 PDEBUG(D_STREAM, "[%s] close", current->comm);
1324 /* Needed for gspca_stream_off, always lock before queue_lock! */
1325 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1326 return -ERESTARTSYS;
1328 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
1329 mutex_unlock(&gspca_dev->usb_lock);
1330 return -ERESTARTSYS;
1333 /* if the file did the capture, free the streaming resources */
1334 if (gspca_dev->capt_file == file) {
1335 if (gspca_dev->streaming)
1336 gspca_stream_off(gspca_dev);
1337 frame_free(gspca_dev);
1339 module_put(gspca_dev->module);
1340 mutex_unlock(&gspca_dev->queue_lock);
1341 mutex_unlock(&gspca_dev->usb_lock);
1343 PDEBUG(D_STREAM, "close done");
1345 return v4l2_fh_release(file);
1348 static int vidioc_querycap(struct file *file, void *priv,
1349 struct v4l2_capability *cap)
1351 struct gspca_dev *gspca_dev = video_drvdata(file);
1353 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
1354 sizeof cap->driver);
1355 if (gspca_dev->dev->product != NULL) {
1356 strlcpy((char *) cap->card, gspca_dev->dev->product,
1359 snprintf((char *) cap->card, sizeof cap->card,
1360 "USB Camera (%04x:%04x)",
1361 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1362 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1364 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1365 sizeof(cap->bus_info));
1366 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1367 | V4L2_CAP_STREAMING
1368 | V4L2_CAP_READWRITE;
1369 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1373 static int get_ctrl(struct gspca_dev *gspca_dev,
1376 const struct ctrl *ctrls;
1379 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1380 i < gspca_dev->sd_desc->nctrls;
1382 if (gspca_dev->ctrl_dis & (1 << i))
1384 if (id == ctrls->qctrl.id)
1390 static int vidioc_queryctrl(struct file *file, void *priv,
1391 struct v4l2_queryctrl *q_ctrl)
1393 struct gspca_dev *gspca_dev = video_drvdata(file);
1394 const struct ctrl *ctrls;
1395 struct gspca_ctrl *gspca_ctrl;
1400 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1401 id &= V4L2_CTRL_ID_MASK;
1404 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
1405 if (gspca_dev->ctrl_dis & (1 << i))
1407 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
1410 && gspca_dev->sd_desc->ctrls[i].qctrl.id
1411 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
1416 idx = get_ctrl(gspca_dev, id);
1420 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1421 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1422 if (gspca_dev->cam.ctrls != NULL) {
1423 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1424 q_ctrl->default_value = gspca_ctrl->def;
1425 q_ctrl->minimum = gspca_ctrl->min;
1426 q_ctrl->maximum = gspca_ctrl->max;
1428 if (gspca_dev->ctrl_inac & (1 << idx))
1429 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
1433 static int vidioc_s_ctrl(struct file *file, void *priv,
1434 struct v4l2_control *ctrl)
1436 struct gspca_dev *gspca_dev = video_drvdata(file);
1437 const struct ctrl *ctrls;
1438 struct gspca_ctrl *gspca_ctrl;
1441 idx = get_ctrl(gspca_dev, ctrl->id);
1444 if (gspca_dev->ctrl_inac & (1 << idx))
1446 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1447 if (gspca_dev->cam.ctrls != NULL) {
1448 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1449 if (ctrl->value < gspca_ctrl->min
1450 || ctrl->value > gspca_ctrl->max)
1454 if (ctrl->value < ctrls->qctrl.minimum
1455 || ctrl->value > ctrls->qctrl.maximum)
1458 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1459 gspca_dev->usb_err = 0;
1460 if (ctrls->set != NULL)
1461 return ctrls->set(gspca_dev, ctrl->value);
1462 if (gspca_ctrl != NULL) {
1463 gspca_ctrl->val = ctrl->value;
1464 if (ctrls->set_control != NULL
1465 && gspca_dev->streaming)
1466 ctrls->set_control(gspca_dev);
1468 return gspca_dev->usb_err;
1471 static int vidioc_g_ctrl(struct file *file, void *priv,
1472 struct v4l2_control *ctrl)
1474 struct gspca_dev *gspca_dev = video_drvdata(file);
1475 const struct ctrl *ctrls;
1478 idx = get_ctrl(gspca_dev, ctrl->id);
1481 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1483 gspca_dev->usb_err = 0;
1484 if (ctrls->get != NULL)
1485 return ctrls->get(gspca_dev, &ctrl->value);
1486 if (gspca_dev->cam.ctrls != NULL)
1487 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1491 static int vidioc_querymenu(struct file *file, void *priv,
1492 struct v4l2_querymenu *qmenu)
1494 struct gspca_dev *gspca_dev = video_drvdata(file);
1496 if (!gspca_dev->sd_desc->querymenu)
1498 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1501 static int vidioc_enum_input(struct file *file, void *priv,
1502 struct v4l2_input *input)
1504 struct gspca_dev *gspca_dev = video_drvdata(file);
1506 if (input->index != 0)
1508 input->type = V4L2_INPUT_TYPE_CAMERA;
1509 input->status = gspca_dev->cam.input_flags;
1510 strlcpy(input->name, gspca_dev->sd_desc->name,
1511 sizeof input->name);
1515 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1521 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1528 static int vidioc_reqbufs(struct file *file, void *priv,
1529 struct v4l2_requestbuffers *rb)
1531 struct gspca_dev *gspca_dev = video_drvdata(file);
1532 int i, ret = 0, streaming;
1534 i = rb->memory; /* (avoid compilation warning) */
1536 case GSPCA_MEMORY_READ: /* (internal call) */
1537 case V4L2_MEMORY_MMAP:
1538 case V4L2_MEMORY_USERPTR:
1543 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1544 return -ERESTARTSYS;
1546 if (gspca_dev->memory != GSPCA_MEMORY_NO
1547 && gspca_dev->memory != GSPCA_MEMORY_READ
1548 && gspca_dev->memory != rb->memory) {
1553 /* only one file may do the capture */
1554 if (gspca_dev->capt_file != NULL
1555 && gspca_dev->capt_file != file) {
1560 /* if allocated, the buffers must not be mapped */
1561 for (i = 0; i < gspca_dev->nframes; i++) {
1562 if (gspca_dev->frame[i].vma_use_count) {
1568 /* stop streaming */
1569 streaming = gspca_dev->streaming;
1571 gspca_stream_off(gspca_dev);
1573 /* Don't restart the stream when switching from read
1575 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1579 /* free the previous allocated buffers, if any */
1580 if (gspca_dev->nframes != 0)
1581 frame_free(gspca_dev);
1582 if (rb->count == 0) /* unrequest */
1584 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
1586 rb->count = gspca_dev->nframes;
1588 ret = gspca_init_transfer(gspca_dev);
1591 mutex_unlock(&gspca_dev->queue_lock);
1592 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1596 static int vidioc_querybuf(struct file *file, void *priv,
1597 struct v4l2_buffer *v4l2_buf)
1599 struct gspca_dev *gspca_dev = video_drvdata(file);
1600 struct gspca_frame *frame;
1602 if (v4l2_buf->index < 0
1603 || v4l2_buf->index >= gspca_dev->nframes)
1606 frame = &gspca_dev->frame[v4l2_buf->index];
1607 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1611 static int vidioc_streamon(struct file *file, void *priv,
1612 enum v4l2_buf_type buf_type)
1614 struct gspca_dev *gspca_dev = video_drvdata(file);
1617 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1619 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1620 return -ERESTARTSYS;
1622 /* check the capture file */
1623 if (gspca_dev->capt_file != file) {
1628 if (gspca_dev->nframes == 0
1629 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
1633 if (!gspca_dev->streaming) {
1634 ret = gspca_init_transfer(gspca_dev);
1639 if (gspca_debug & D_STREAM) {
1640 PDEBUG_MODE("stream on OK",
1648 mutex_unlock(&gspca_dev->queue_lock);
1652 static int vidioc_streamoff(struct file *file, void *priv,
1653 enum v4l2_buf_type buf_type)
1655 struct gspca_dev *gspca_dev = video_drvdata(file);
1658 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1661 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1662 return -ERESTARTSYS;
1664 if (!gspca_dev->streaming) {
1669 /* check the capture file */
1670 if (gspca_dev->capt_file != file) {
1675 /* stop streaming */
1676 gspca_stream_off(gspca_dev);
1677 /* In case another thread is waiting in dqbuf */
1678 wake_up_interruptible(&gspca_dev->wq);
1680 /* empty the transfer queues */
1681 atomic_set(&gspca_dev->fr_q, 0);
1682 atomic_set(&gspca_dev->fr_i, 0);
1683 gspca_dev->fr_o = 0;
1686 mutex_unlock(&gspca_dev->queue_lock);
1690 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1691 struct v4l2_jpegcompression *jpegcomp)
1693 struct gspca_dev *gspca_dev = video_drvdata(file);
1695 if (!gspca_dev->sd_desc->get_jcomp)
1697 gspca_dev->usb_err = 0;
1698 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1701 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1702 struct v4l2_jpegcompression *jpegcomp)
1704 struct gspca_dev *gspca_dev = video_drvdata(file);
1706 if (!gspca_dev->sd_desc->set_jcomp)
1708 gspca_dev->usb_err = 0;
1709 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1712 static int vidioc_g_parm(struct file *filp, void *priv,
1713 struct v4l2_streamparm *parm)
1715 struct gspca_dev *gspca_dev = video_drvdata(filp);
1717 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1719 if (gspca_dev->sd_desc->get_streamparm) {
1720 gspca_dev->usb_err = 0;
1721 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1722 return gspca_dev->usb_err;
1727 static int vidioc_s_parm(struct file *filp, void *priv,
1728 struct v4l2_streamparm *parm)
1730 struct gspca_dev *gspca_dev = video_drvdata(filp);
1733 n = parm->parm.capture.readbuffers;
1734 if (n == 0 || n >= GSPCA_MAX_FRAMES)
1735 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1737 gspca_dev->nbufread = n;
1739 if (gspca_dev->sd_desc->set_streamparm) {
1740 gspca_dev->usb_err = 0;
1741 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1742 return gspca_dev->usb_err;
1748 static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1750 struct gspca_dev *gspca_dev = video_drvdata(file);
1751 struct gspca_frame *frame;
1753 unsigned long addr, start, size;
1756 start = vma->vm_start;
1757 size = vma->vm_end - vma->vm_start;
1758 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1760 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1761 return -ERESTARTSYS;
1762 if (gspca_dev->capt_file != file) {
1768 for (i = 0; i < gspca_dev->nframes; ++i) {
1769 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1770 PDEBUG(D_STREAM, "mmap bad memory type");
1773 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1775 frame = &gspca_dev->frame[i];
1779 if (frame == NULL) {
1780 PDEBUG(D_STREAM, "mmap no frame buffer found");
1784 if (size != frame->v4l2_buf.length) {
1785 PDEBUG(D_STREAM, "mmap bad size");
1791 * - VM_IO marks the area as being a mmaped region for I/O to a
1792 * device. It also prevents the region from being core dumped.
1794 vma->vm_flags |= VM_IO;
1796 addr = (unsigned long) frame->data;
1798 page = vmalloc_to_page((void *) addr);
1799 ret = vm_insert_page(vma, start, page);
1807 vma->vm_ops = &gspca_vm_ops;
1808 vma->vm_private_data = frame;
1812 mutex_unlock(&gspca_dev->queue_lock);
1816 static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1817 enum v4l2_memory memory)
1819 if (!gspca_dev->present)
1821 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1822 !gspca_dev->streaming)
1825 /* check if a frame is ready */
1826 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1829 static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1830 enum v4l2_memory memory)
1834 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1835 return -ERESTARTSYS;
1836 ret = frame_ready_nolock(gspca_dev, file, memory);
1837 mutex_unlock(&gspca_dev->queue_lock);
1842 * dequeue a video buffer
1844 * If nonblock_ing is false, block until a buffer is available.
1846 static int vidioc_dqbuf(struct file *file, void *priv,
1847 struct v4l2_buffer *v4l2_buf)
1849 struct gspca_dev *gspca_dev = video_drvdata(file);
1850 struct gspca_frame *frame;
1853 PDEBUG(D_FRAM, "dqbuf");
1855 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1856 return -ERESTARTSYS;
1859 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1865 mutex_unlock(&gspca_dev->queue_lock);
1867 if (file->f_flags & O_NONBLOCK)
1870 /* wait till a frame is ready */
1871 ret = wait_event_interruptible_timeout(gspca_dev->wq,
1872 frame_ready(gspca_dev, file, v4l2_buf->memory),
1873 msecs_to_jiffies(3000));
1879 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1880 return -ERESTARTSYS;
1883 i = gspca_dev->fr_o;
1884 j = gspca_dev->fr_queue[i];
1885 frame = &gspca_dev->frame[j];
1887 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
1889 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1890 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1891 PDEBUG(D_FRAM, "dqbuf %d", j);
1894 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
1895 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
1897 frame->v4l2_buf.bytesused)) {
1898 PDEBUG(D_ERR|D_STREAM,
1899 "dqbuf cp to user failed");
1904 mutex_unlock(&gspca_dev->queue_lock);
1906 if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
1907 mutex_lock(&gspca_dev->usb_lock);
1908 gspca_dev->usb_err = 0;
1909 if (gspca_dev->present)
1910 gspca_dev->sd_desc->dq_callback(gspca_dev);
1911 mutex_unlock(&gspca_dev->usb_lock);
1918 * queue a video buffer
1920 * Attempting to queue a buffer that has already been
1921 * queued will return -EINVAL.
1923 static int vidioc_qbuf(struct file *file, void *priv,
1924 struct v4l2_buffer *v4l2_buf)
1926 struct gspca_dev *gspca_dev = video_drvdata(file);
1927 struct gspca_frame *frame;
1930 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
1932 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1933 return -ERESTARTSYS;
1935 index = v4l2_buf->index;
1936 if ((unsigned) index >= gspca_dev->nframes) {
1938 "qbuf idx %d >= %d", index, gspca_dev->nframes);
1942 if (v4l2_buf->memory != gspca_dev->memory) {
1943 PDEBUG(D_FRAM, "qbuf bad memory type");
1948 frame = &gspca_dev->frame[index];
1949 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1950 PDEBUG(D_FRAM, "qbuf bad state");
1955 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
1957 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
1958 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1959 frame->v4l2_buf.length = v4l2_buf->length;
1962 /* put the buffer in the 'queued' queue */
1963 i = atomic_read(&gspca_dev->fr_q);
1964 gspca_dev->fr_queue[i] = index;
1965 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
1967 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1968 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1971 mutex_unlock(&gspca_dev->queue_lock);
1976 * allocate the resources for read()
1978 static int read_alloc(struct gspca_dev *gspca_dev,
1981 struct v4l2_buffer v4l2_buf;
1984 PDEBUG(D_STREAM, "read alloc");
1986 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1987 return -ERESTARTSYS;
1989 if (gspca_dev->nframes == 0) {
1990 struct v4l2_requestbuffers rb;
1992 memset(&rb, 0, sizeof rb);
1993 rb.count = gspca_dev->nbufread;
1994 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1995 rb.memory = GSPCA_MEMORY_READ;
1996 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1998 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
2001 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2002 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2003 v4l2_buf.memory = GSPCA_MEMORY_READ;
2004 for (i = 0; i < gspca_dev->nbufread; i++) {
2006 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2008 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2014 /* start streaming */
2015 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2017 PDEBUG(D_STREAM, "read streamon err %d", ret);
2019 mutex_unlock(&gspca_dev->usb_lock);
2023 static unsigned int dev_poll(struct file *file, poll_table *wait)
2025 struct gspca_dev *gspca_dev = video_drvdata(file);
2026 unsigned long req_events = poll_requested_events(wait);
2029 PDEBUG(D_FRAM, "poll");
2031 if (req_events & POLLPRI)
2032 ret |= v4l2_ctrl_poll(file, wait);
2034 if (req_events & (POLLIN | POLLRDNORM)) {
2035 /* if reqbufs is not done, the user would use read() */
2036 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
2037 if (read_alloc(gspca_dev, file) != 0) {
2043 poll_wait(file, &gspca_dev->wq, wait);
2045 /* check if an image has been received */
2046 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
2050 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2051 ret |= POLLIN | POLLRDNORM;
2052 mutex_unlock(&gspca_dev->queue_lock);
2056 if (!gspca_dev->present)
2062 static ssize_t dev_read(struct file *file, char __user *data,
2063 size_t count, loff_t *ppos)
2065 struct gspca_dev *gspca_dev = video_drvdata(file);
2066 struct gspca_frame *frame;
2067 struct v4l2_buffer v4l2_buf;
2068 struct timeval timestamp;
2071 PDEBUG(D_FRAM, "read (%zd)", count);
2072 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
2073 ret = read_alloc(gspca_dev, file);
2079 timestamp = ktime_to_timeval(ktime_get());
2083 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2084 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2085 v4l2_buf.memory = GSPCA_MEMORY_READ;
2086 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2088 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2092 /* if the process slept for more than 1 second,
2093 * get a newer frame */
2094 frame = &gspca_dev->frame[v4l2_buf.index];
2096 break; /* avoid infinite loop */
2097 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2099 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2101 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2106 /* copy the frame */
2107 if (count > frame->v4l2_buf.bytesused)
2108 count = frame->v4l2_buf.bytesused;
2109 ret = copy_to_user(data, frame->data, count);
2111 PDEBUG(D_ERR|D_STREAM,
2112 "read cp to user lack %d / %zd", ret, count);
2118 /* in each case, requeue the buffer */
2119 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2125 static struct v4l2_file_operations dev_fops = {
2126 .owner = THIS_MODULE,
2128 .release = dev_close,
2131 .unlocked_ioctl = video_ioctl2,
2135 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
2136 .vidioc_querycap = vidioc_querycap,
2137 .vidioc_dqbuf = vidioc_dqbuf,
2138 .vidioc_qbuf = vidioc_qbuf,
2139 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2140 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2141 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2142 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2143 .vidioc_streamon = vidioc_streamon,
2144 .vidioc_queryctrl = vidioc_queryctrl,
2145 .vidioc_g_ctrl = vidioc_g_ctrl,
2146 .vidioc_s_ctrl = vidioc_s_ctrl,
2147 .vidioc_querymenu = vidioc_querymenu,
2148 .vidioc_enum_input = vidioc_enum_input,
2149 .vidioc_g_input = vidioc_g_input,
2150 .vidioc_s_input = vidioc_s_input,
2151 .vidioc_reqbufs = vidioc_reqbufs,
2152 .vidioc_querybuf = vidioc_querybuf,
2153 .vidioc_streamoff = vidioc_streamoff,
2154 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2155 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2156 .vidioc_g_parm = vidioc_g_parm,
2157 .vidioc_s_parm = vidioc_s_parm,
2158 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2159 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
2160 #ifdef CONFIG_VIDEO_ADV_DEBUG
2161 .vidioc_g_register = vidioc_g_register,
2162 .vidioc_s_register = vidioc_s_register,
2164 .vidioc_g_chip_ident = vidioc_g_chip_ident,
2165 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2166 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2169 static const struct video_device gspca_template = {
2170 .name = "gspca main driver",
2172 .ioctl_ops = &dev_ioctl_ops,
2173 .release = video_device_release_empty, /* We use v4l2_dev.release */
2176 /* initialize the controls */
2177 static void ctrls_init(struct gspca_dev *gspca_dev)
2179 struct gspca_ctrl *ctrl;
2182 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2183 i < gspca_dev->sd_desc->nctrls;
2185 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2186 ctrl->val = ctrl->def;
2187 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2188 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2193 * probe and create a new gspca device
2195 * This function must be called by the sub-driver when it is
2196 * called for probing a new device.
2198 int gspca_dev_probe2(struct usb_interface *intf,
2199 const struct usb_device_id *id,
2200 const struct sd_desc *sd_desc,
2202 struct module *module)
2204 struct gspca_dev *gspca_dev;
2205 struct usb_device *dev = interface_to_usbdev(intf);
2208 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2209 sd_desc->name, id->idVendor, id->idProduct);
2211 /* create the device */
2212 if (dev_size < sizeof *gspca_dev)
2213 dev_size = sizeof *gspca_dev;
2214 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
2216 pr_err("couldn't kzalloc gspca struct\n");
2219 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2220 if (!gspca_dev->usb_buf) {
2221 pr_err("out of memory\n");
2225 gspca_dev->dev = dev;
2226 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
2228 /* check if any audio device */
2229 if (dev->actconfig->desc.bNumInterfaces != 1) {
2231 struct usb_interface *intf2;
2233 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2234 intf2 = dev->actconfig->interface[i];
2236 && intf2->altsetting != NULL
2237 && intf2->altsetting->desc.bInterfaceClass ==
2239 gspca_dev->audio = 1;
2245 gspca_dev->v4l2_dev.release = gspca_release;
2246 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2249 gspca_dev->sd_desc = sd_desc;
2250 gspca_dev->nbufread = 2;
2251 gspca_dev->empty_packet = -1; /* don't check the empty packets */
2252 gspca_dev->vdev = gspca_template;
2253 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
2254 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
2255 set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
2256 gspca_dev->module = module;
2257 gspca_dev->present = 1;
2259 mutex_init(&gspca_dev->usb_lock);
2260 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
2261 mutex_init(&gspca_dev->queue_lock);
2262 init_waitqueue_head(&gspca_dev->wq);
2264 /* configure the subdriver and initialize the USB device */
2265 ret = sd_desc->config(gspca_dev, id);
2268 if (gspca_dev->cam.ctrls != NULL)
2269 ctrls_init(gspca_dev);
2270 ret = sd_desc->init(gspca_dev);
2273 if (sd_desc->init_controls)
2274 ret = sd_desc->init_controls(gspca_dev);
2277 gspca_set_default_mode(gspca_dev);
2279 ret = gspca_input_connect(gspca_dev);
2284 * Don't take usb_lock for these ioctls. This improves latency if
2285 * usb_lock is taken for a long time, e.g. when changing a control
2286 * value, and a new frame is ready to be dequeued.
2288 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
2289 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
2290 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
2292 /* init video stuff */
2293 ret = video_register_device(&gspca_dev->vdev,
2297 pr_err("video_register_device err %d\n", ret);
2301 usb_set_intfdata(intf, gspca_dev);
2302 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
2304 gspca_input_create_urb(gspca_dev);
2308 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2309 if (gspca_dev->input_dev)
2310 input_unregister_device(gspca_dev->input_dev);
2312 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2313 kfree(gspca_dev->usb_buf);
2317 EXPORT_SYMBOL(gspca_dev_probe2);
2319 /* same function as the previous one, but check the interface */
2320 int gspca_dev_probe(struct usb_interface *intf,
2321 const struct usb_device_id *id,
2322 const struct sd_desc *sd_desc,
2324 struct module *module)
2326 struct usb_device *dev = interface_to_usbdev(intf);
2328 /* we don't handle multi-config cameras */
2329 if (dev->descriptor.bNumConfigurations != 1) {
2330 pr_err("%04x:%04x too many config\n",
2331 id->idVendor, id->idProduct);
2335 /* the USB video interface must be the first one */
2336 if (dev->actconfig->desc.bNumInterfaces != 1
2337 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
2340 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2342 EXPORT_SYMBOL(gspca_dev_probe);
2347 * This function must be called by the sub-driver
2348 * when the device disconnects, after the specific resources are freed.
2350 void gspca_disconnect(struct usb_interface *intf)
2352 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2353 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2354 struct input_dev *input_dev;
2357 PDEBUG(D_PROBE, "%s disconnect",
2358 video_device_node_name(&gspca_dev->vdev));
2360 mutex_lock(&gspca_dev->usb_lock);
2362 usb_set_intfdata(intf, NULL);
2363 gspca_dev->dev = NULL;
2364 gspca_dev->present = 0;
2365 destroy_urbs(gspca_dev);
2367 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2368 gspca_input_destroy_urb(gspca_dev);
2369 input_dev = gspca_dev->input_dev;
2371 gspca_dev->input_dev = NULL;
2372 input_unregister_device(input_dev);
2375 /* Free subdriver's streaming resources / stop sd workqueue(s) */
2376 if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
2377 gspca_dev->sd_desc->stop0(gspca_dev);
2378 gspca_dev->streaming = 0;
2379 wake_up_interruptible(&gspca_dev->wq);
2381 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
2382 video_unregister_device(&gspca_dev->vdev);
2384 mutex_unlock(&gspca_dev->usb_lock);
2386 /* (this will call gspca_release() immediately or on last close) */
2387 v4l2_device_put(&gspca_dev->v4l2_dev);
2389 EXPORT_SYMBOL(gspca_disconnect);
2392 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2394 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2396 if (!gspca_dev->streaming)
2398 mutex_lock(&gspca_dev->usb_lock);
2399 gspca_dev->frozen = 1; /* avoid urb error messages */
2400 gspca_dev->usb_err = 0;
2401 if (gspca_dev->sd_desc->stopN)
2402 gspca_dev->sd_desc->stopN(gspca_dev);
2403 destroy_urbs(gspca_dev);
2404 gspca_input_destroy_urb(gspca_dev);
2405 gspca_set_alt0(gspca_dev);
2406 if (gspca_dev->sd_desc->stop0)
2407 gspca_dev->sd_desc->stop0(gspca_dev);
2408 mutex_unlock(&gspca_dev->usb_lock);
2411 EXPORT_SYMBOL(gspca_suspend);
2413 int gspca_resume(struct usb_interface *intf)
2415 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2416 int streaming, ret = 0;
2418 mutex_lock(&gspca_dev->usb_lock);
2419 gspca_dev->frozen = 0;
2420 gspca_dev->usb_err = 0;
2421 gspca_dev->sd_desc->init(gspca_dev);
2422 gspca_input_create_urb(gspca_dev);
2424 * Most subdrivers send all ctrl values on sd_start and thus
2425 * only write to the device registers on s_ctrl when streaming ->
2426 * Clear streaming to avoid setting all ctrls twice.
2428 streaming = gspca_dev->streaming;
2429 gspca_dev->streaming = 0;
2430 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
2432 ret = gspca_init_transfer(gspca_dev);
2433 mutex_unlock(&gspca_dev->usb_lock);
2436 EXPORT_SYMBOL(gspca_resume);
2439 /* -- module insert / remove -- */
2440 static int __init gspca_init(void)
2442 pr_info("v" GSPCA_VERSION " registered\n");
2445 static void __exit gspca_exit(void)
2449 module_init(gspca_init);
2450 module_exit(gspca_exit);
2453 module_param_named(debug, gspca_debug, int, 0644);
2454 MODULE_PARM_DESC(debug,
2455 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
2456 " 0x08:stream 0x10:frame 0x20:packet"