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>
44 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
45 #include <linux/input.h>
46 #include <linux/usb/input.h>
50 #define DEF_NURBS 3 /* default number of URBs */
51 #if DEF_NURBS > MAX_NURBS
52 #error "DEF_NURBS too big"
55 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
56 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(GSPCA_VERSION
);
61 int gspca_debug
= D_ERR
| D_PROBE
;
62 EXPORT_SYMBOL(gspca_debug
);
64 static void PDEBUG_MODE(char *txt
, __u32 pixfmt
, int w
, int h
)
66 if ((pixfmt
>> 24) >= '0' && (pixfmt
>> 24) <= 'z') {
67 PDEBUG(D_CONF
|D_STREAM
, "%s %c%c%c%c %dx%d",
71 (pixfmt
>> 16) & 0xff,
75 PDEBUG(D_CONF
|D_STREAM
, "%s 0x%08x %dx%d",
82 #define PDEBUG_MODE(txt, pixfmt, w, h)
85 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
86 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
87 #define GSPCA_MEMORY_READ 7
89 #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
94 static void gspca_vm_open(struct vm_area_struct
*vma
)
96 struct gspca_frame
*frame
= vma
->vm_private_data
;
98 frame
->vma_use_count
++;
99 frame
->v4l2_buf
.flags
|= V4L2_BUF_FLAG_MAPPED
;
102 static void gspca_vm_close(struct vm_area_struct
*vma
)
104 struct gspca_frame
*frame
= vma
->vm_private_data
;
106 if (--frame
->vma_use_count
<= 0)
107 frame
->v4l2_buf
.flags
&= ~V4L2_BUF_FLAG_MAPPED
;
110 static const struct vm_operations_struct gspca_vm_ops
= {
111 .open
= gspca_vm_open
,
112 .close
= gspca_vm_close
,
116 * Input and interrupt endpoint handling functions
118 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
119 static void int_irq(struct urb
*urb
)
121 struct gspca_dev
*gspca_dev
= (struct gspca_dev
*) urb
->context
;
127 if (gspca_dev
->sd_desc
->int_pkt_scan(gspca_dev
,
128 urb
->transfer_buffer
, urb
->actual_length
) < 0) {
129 PDEBUG(D_ERR
, "Unknown packet received");
137 /* Stop is requested either by software or hardware is gone,
138 * keep the ret value non-zero and don't resubmit later.
143 PDEBUG(D_ERR
, "URB error %i, resubmitting", urb
->status
);
149 ret
= usb_submit_urb(urb
, GFP_ATOMIC
);
151 pr_err("Resubmit URB failed with error %i\n", ret
);
155 static int gspca_input_connect(struct gspca_dev
*dev
)
157 struct input_dev
*input_dev
;
160 dev
->input_dev
= NULL
;
161 if (dev
->sd_desc
->int_pkt_scan
|| dev
->sd_desc
->other_input
) {
162 input_dev
= input_allocate_device();
166 usb_make_path(dev
->dev
, dev
->phys
, sizeof(dev
->phys
));
167 strlcat(dev
->phys
, "/input0", sizeof(dev
->phys
));
169 input_dev
->name
= dev
->sd_desc
->name
;
170 input_dev
->phys
= dev
->phys
;
172 usb_to_input_id(dev
->dev
, &input_dev
->id
);
174 input_dev
->evbit
[0] = BIT_MASK(EV_KEY
);
175 input_dev
->keybit
[BIT_WORD(KEY_CAMERA
)] = BIT_MASK(KEY_CAMERA
);
176 input_dev
->dev
.parent
= &dev
->dev
->dev
;
178 err
= input_register_device(input_dev
);
180 pr_err("Input device registration failed with error %i\n",
182 input_dev
->dev
.parent
= NULL
;
183 input_free_device(input_dev
);
185 dev
->input_dev
= input_dev
;
192 static int alloc_and_submit_int_urb(struct gspca_dev
*gspca_dev
,
193 struct usb_endpoint_descriptor
*ep
)
195 unsigned int buffer_len
;
198 struct usb_device
*dev
;
202 buffer_len
= le16_to_cpu(ep
->wMaxPacketSize
);
203 interval
= ep
->bInterval
;
204 PDEBUG(D_CONF
, "found int in endpoint: 0x%x, "
205 "buffer_len=%u, interval=%u",
206 ep
->bEndpointAddress
, buffer_len
, interval
);
208 dev
= gspca_dev
->dev
;
210 urb
= usb_alloc_urb(0, GFP_KERNEL
);
216 buffer
= usb_alloc_coherent(dev
, buffer_len
,
217 GFP_KERNEL
, &urb
->transfer_dma
);
222 usb_fill_int_urb(urb
, dev
,
223 usb_rcvintpipe(dev
, ep
->bEndpointAddress
),
225 int_irq
, (void *)gspca_dev
, interval
);
226 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
227 ret
= usb_submit_urb(urb
, GFP_KERNEL
);
229 PDEBUG(D_ERR
, "submit int URB failed with error %i", ret
);
232 gspca_dev
->int_urb
= urb
;
236 usb_free_coherent(dev
,
237 urb
->transfer_buffer_length
,
238 urb
->transfer_buffer
,
246 static void gspca_input_create_urb(struct gspca_dev
*gspca_dev
)
248 struct usb_interface
*intf
;
249 struct usb_host_interface
*intf_desc
;
250 struct usb_endpoint_descriptor
*ep
;
253 if (gspca_dev
->sd_desc
->int_pkt_scan
) {
254 intf
= usb_ifnum_to_if(gspca_dev
->dev
, gspca_dev
->iface
);
255 intf_desc
= intf
->cur_altsetting
;
256 for (i
= 0; i
< intf_desc
->desc
.bNumEndpoints
; i
++) {
257 ep
= &intf_desc
->endpoint
[i
].desc
;
258 if (usb_endpoint_dir_in(ep
) &&
259 usb_endpoint_xfer_int(ep
)) {
261 alloc_and_submit_int_urb(gspca_dev
, ep
);
268 static void gspca_input_destroy_urb(struct gspca_dev
*gspca_dev
)
272 urb
= gspca_dev
->int_urb
;
274 gspca_dev
->int_urb
= NULL
;
276 usb_free_coherent(gspca_dev
->dev
,
277 urb
->transfer_buffer_length
,
278 urb
->transfer_buffer
,
284 static inline void gspca_input_destroy_urb(struct gspca_dev
*gspca_dev
)
288 static inline void gspca_input_create_urb(struct gspca_dev
*gspca_dev
)
292 static inline int gspca_input_connect(struct gspca_dev
*dev
)
299 * fill a video frame from an URB and resubmit
301 static void fill_frame(struct gspca_dev
*gspca_dev
,
304 u8
*data
; /* address of data in the iso message */
308 if (urb
->status
!= 0) {
309 if (urb
->status
== -ESHUTDOWN
)
310 return; /* disconnection */
312 if (gspca_dev
->frozen
)
315 PDEBUG(D_ERR
|D_PACK
, "urb status: %d", urb
->status
);
319 pkt_scan
= gspca_dev
->sd_desc
->pkt_scan
;
320 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
321 len
= urb
->iso_frame_desc
[i
].actual_length
;
323 /* check the packet status and length */
324 st
= urb
->iso_frame_desc
[i
].status
;
326 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
328 gspca_dev
->last_packet_type
= DISCARD_PACKET
;
332 if (gspca_dev
->empty_packet
== 0)
333 gspca_dev
->empty_packet
= 1;
337 /* let the packet be analyzed by the subdriver */
338 PDEBUG(D_PACK
, "packet [%d] o:%d l:%d",
339 i
, urb
->iso_frame_desc
[i
].offset
, len
);
340 data
= (u8
*) urb
->transfer_buffer
341 + urb
->iso_frame_desc
[i
].offset
;
342 pkt_scan(gspca_dev
, data
, len
);
346 /* resubmit the URB */
347 st
= usb_submit_urb(urb
, GFP_ATOMIC
);
349 pr_err("usb_submit_urb() ret %d\n", st
);
353 * ISOC message interrupt from the USB device
355 * Analyse each packet and call the subdriver for copy to the frame buffer.
357 static void isoc_irq(struct urb
*urb
)
359 struct gspca_dev
*gspca_dev
= (struct gspca_dev
*) urb
->context
;
361 PDEBUG(D_PACK
, "isoc irq");
362 if (!gspca_dev
->streaming
)
364 fill_frame(gspca_dev
, urb
);
368 * bulk message interrupt from the USB device
370 static void bulk_irq(struct urb
*urb
)
372 struct gspca_dev
*gspca_dev
= (struct gspca_dev
*) urb
->context
;
375 PDEBUG(D_PACK
, "bulk irq");
376 if (!gspca_dev
->streaming
)
378 switch (urb
->status
) {
382 return; /* disconnection */
385 if (gspca_dev
->frozen
)
388 PDEBUG(D_ERR
|D_PACK
, "urb status: %d", urb
->status
);
393 PDEBUG(D_PACK
, "packet l:%d", urb
->actual_length
);
394 gspca_dev
->sd_desc
->pkt_scan(gspca_dev
,
395 urb
->transfer_buffer
,
399 /* resubmit the URB */
400 if (gspca_dev
->cam
.bulk_nurbs
!= 0) {
401 st
= usb_submit_urb(urb
, GFP_ATOMIC
);
403 pr_err("usb_submit_urb() ret %d\n", st
);
408 * add data to the current frame
410 * This function is called by the subdrivers at interrupt level.
412 * To build a frame, these ones must add
414 * - 0 or many INTER_PACKETs
416 * DISCARD_PACKET invalidates the whole frame.
418 void gspca_frame_add(struct gspca_dev
*gspca_dev
,
419 enum gspca_packet_type packet_type
,
423 struct gspca_frame
*frame
;
426 PDEBUG(D_PACK
, "add t:%d l:%d", packet_type
, len
);
428 if (packet_type
== FIRST_PACKET
) {
429 i
= atomic_read(&gspca_dev
->fr_i
);
431 /* if there are no queued buffer, discard the whole frame */
432 if (i
== atomic_read(&gspca_dev
->fr_q
)) {
433 gspca_dev
->last_packet_type
= DISCARD_PACKET
;
434 gspca_dev
->sequence
++;
437 j
= gspca_dev
->fr_queue
[i
];
438 frame
= &gspca_dev
->frame
[j
];
439 frame
->v4l2_buf
.timestamp
= ktime_to_timeval(ktime_get());
440 frame
->v4l2_buf
.sequence
= gspca_dev
->sequence
++;
441 gspca_dev
->image
= frame
->data
;
442 gspca_dev
->image_len
= 0;
444 switch (gspca_dev
->last_packet_type
) {
446 if (packet_type
== LAST_PACKET
) {
447 gspca_dev
->last_packet_type
= packet_type
;
448 gspca_dev
->image
= NULL
;
449 gspca_dev
->image_len
= 0;
457 /* append the packet to the frame buffer */
459 if (gspca_dev
->image_len
+ len
> gspca_dev
->frsz
) {
460 PDEBUG(D_ERR
|D_PACK
, "frame overflow %d > %d",
461 gspca_dev
->image_len
+ len
,
463 packet_type
= DISCARD_PACKET
;
465 /* !! image is NULL only when last pkt is LAST or DISCARD
466 if (gspca_dev->image == NULL) {
467 pr_err("gspca_frame_add() image == NULL\n");
471 memcpy(gspca_dev
->image
+ gspca_dev
->image_len
,
473 gspca_dev
->image_len
+= len
;
476 gspca_dev
->last_packet_type
= packet_type
;
478 /* if last packet, invalidate packet concatenation until
479 * next first packet, wake up the application and advance
481 if (packet_type
== LAST_PACKET
) {
482 i
= atomic_read(&gspca_dev
->fr_i
);
483 j
= gspca_dev
->fr_queue
[i
];
484 frame
= &gspca_dev
->frame
[j
];
485 frame
->v4l2_buf
.bytesused
= gspca_dev
->image_len
;
486 frame
->v4l2_buf
.flags
= (frame
->v4l2_buf
.flags
487 | V4L2_BUF_FLAG_DONE
)
488 & ~V4L2_BUF_FLAG_QUEUED
;
489 i
= (i
+ 1) % GSPCA_MAX_FRAMES
;
490 atomic_set(&gspca_dev
->fr_i
, i
);
491 wake_up_interruptible(&gspca_dev
->wq
); /* event = new frame */
492 PDEBUG(D_FRAM
, "frame complete len:%d",
493 frame
->v4l2_buf
.bytesused
);
494 gspca_dev
->image
= NULL
;
495 gspca_dev
->image_len
= 0;
498 EXPORT_SYMBOL(gspca_frame_add
);
500 static int frame_alloc(struct gspca_dev
*gspca_dev
, struct file
*file
,
501 enum v4l2_memory memory
, unsigned int count
)
503 struct gspca_frame
*frame
;
507 i
= gspca_dev
->curr_mode
;
508 frsz
= gspca_dev
->cam
.cam_mode
[i
].sizeimage
;
509 PDEBUG(D_STREAM
, "frame alloc frsz: %d", frsz
);
510 frsz
= PAGE_ALIGN(frsz
);
511 if (count
>= GSPCA_MAX_FRAMES
)
512 count
= GSPCA_MAX_FRAMES
- 1;
513 gspca_dev
->frbuf
= vmalloc_32(frsz
* count
);
514 if (!gspca_dev
->frbuf
) {
515 pr_err("frame alloc failed\n");
518 gspca_dev
->capt_file
= file
;
519 gspca_dev
->memory
= memory
;
520 gspca_dev
->frsz
= frsz
;
521 gspca_dev
->nframes
= count
;
522 for (i
= 0; i
< count
; i
++) {
523 frame
= &gspca_dev
->frame
[i
];
524 frame
->v4l2_buf
.index
= i
;
525 frame
->v4l2_buf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
526 frame
->v4l2_buf
.flags
= 0;
527 frame
->v4l2_buf
.field
= V4L2_FIELD_NONE
;
528 frame
->v4l2_buf
.length
= frsz
;
529 frame
->v4l2_buf
.memory
= memory
;
530 frame
->v4l2_buf
.sequence
= 0;
531 frame
->data
= gspca_dev
->frbuf
+ i
* frsz
;
532 frame
->v4l2_buf
.m
.offset
= i
* frsz
;
534 atomic_set(&gspca_dev
->fr_q
, 0);
535 atomic_set(&gspca_dev
->fr_i
, 0);
540 static void frame_free(struct gspca_dev
*gspca_dev
)
544 PDEBUG(D_STREAM
, "frame free");
545 if (gspca_dev
->frbuf
!= NULL
) {
546 vfree(gspca_dev
->frbuf
);
547 gspca_dev
->frbuf
= NULL
;
548 for (i
= 0; i
< gspca_dev
->nframes
; i
++)
549 gspca_dev
->frame
[i
].data
= NULL
;
551 gspca_dev
->nframes
= 0;
553 gspca_dev
->capt_file
= NULL
;
554 gspca_dev
->memory
= GSPCA_MEMORY_NO
;
557 static void destroy_urbs(struct gspca_dev
*gspca_dev
)
562 PDEBUG(D_STREAM
, "kill transfer");
563 for (i
= 0; i
< MAX_NURBS
; i
++) {
564 urb
= gspca_dev
->urb
[i
];
568 gspca_dev
->urb
[i
] = NULL
;
570 if (urb
->transfer_buffer
!= NULL
)
571 usb_free_coherent(gspca_dev
->dev
,
572 urb
->transfer_buffer_length
,
573 urb
->transfer_buffer
,
579 static int gspca_set_alt0(struct gspca_dev
*gspca_dev
)
583 if (gspca_dev
->alt
== 0)
585 ret
= usb_set_interface(gspca_dev
->dev
, gspca_dev
->iface
, 0);
587 pr_err("set alt 0 err %d\n", ret
);
591 /* Note: both the queue and the usb locks should be held when calling this */
592 static void gspca_stream_off(struct gspca_dev
*gspca_dev
)
594 gspca_dev
->streaming
= 0;
595 if (gspca_dev
->present
) {
596 if (gspca_dev
->sd_desc
->stopN
)
597 gspca_dev
->sd_desc
->stopN(gspca_dev
);
598 destroy_urbs(gspca_dev
);
599 gspca_input_destroy_urb(gspca_dev
);
600 gspca_set_alt0(gspca_dev
);
601 gspca_input_create_urb(gspca_dev
);
604 /* always call stop0 to free the subdriver's resources */
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 i
= gspca_dev
->curr_mode
;
637 bandwidth
= gspca_dev
->cam
.cam_mode
[i
].sizeimage
;
639 /* if the image is compressed, estimate the mean image size */
640 if (bandwidth
< gspca_dev
->cam
.cam_mode
[i
].width
*
641 gspca_dev
->cam
.cam_mode
[i
].height
)
644 /* estimate the frame rate */
645 if (gspca_dev
->sd_desc
->get_streamparm
) {
646 struct v4l2_streamparm parm
;
648 parm
.parm
.capture
.timeperframe
.denominator
= 15;
649 gspca_dev
->sd_desc
->get_streamparm(gspca_dev
, &parm
);
650 bandwidth
*= parm
.parm
.capture
.timeperframe
.denominator
;
652 bandwidth
*= 15; /* 15 fps */
655 PDEBUG(D_STREAM
, "min bandwidth: %d", bandwidth
);
667 * build the table of the endpoints
668 * and compute the minimum bandwidth for the image transfer
670 static int build_ep_tb(struct gspca_dev
*gspca_dev
,
671 struct usb_interface
*intf
,
673 struct ep_tb_s
*ep_tb
)
675 struct usb_host_endpoint
*ep
;
676 int i
, j
, nbalt
, psize
, found
;
677 u32 bandwidth
, last_bw
;
679 nbalt
= intf
->num_altsetting
;
681 nbalt
= MAX_ALT
; /* fixme: should warn */
683 /* build the endpoint table */
687 ep_tb
->bandwidth
= 2000 * 2000 * 120;
689 for (j
= 0; j
< nbalt
; j
++) {
690 ep
= alt_xfer(&intf
->altsetting
[j
], xfer
);
693 psize
= le16_to_cpu(ep
->desc
.wMaxPacketSize
);
694 if (!gspca_dev
->cam
.bulk
) /* isoc */
695 psize
= (psize
& 0x07ff) *
696 (1 + ((psize
>> 11) & 3));
697 bandwidth
= psize
* ep
->desc
.bInterval
* 1000;
698 if (gspca_dev
->dev
->speed
== USB_SPEED_HIGH
699 || gspca_dev
->dev
->speed
== USB_SPEED_SUPER
)
701 if (bandwidth
<= last_bw
)
703 if (bandwidth
< ep_tb
->bandwidth
) {
704 ep_tb
->bandwidth
= bandwidth
;
711 PDEBUG(D_STREAM
, "alt %d bandwidth %d",
712 ep_tb
->alt
, ep_tb
->bandwidth
);
713 last_bw
= ep_tb
->bandwidth
;
718 /* get the requested bandwidth and start at the highest atlsetting */
719 bandwidth
= which_bandwidth(gspca_dev
);
723 if (ep_tb
->bandwidth
< bandwidth
)
731 * create the URBs for image transfer
733 static int create_urbs(struct gspca_dev
*gspca_dev
,
734 struct usb_host_endpoint
*ep
)
737 int n
, nurbs
, i
, psize
, npkt
, bsize
;
739 /* calculate the packet size and the number of packets */
740 psize
= le16_to_cpu(ep
->desc
.wMaxPacketSize
);
742 if (!gspca_dev
->cam
.bulk
) { /* isoc */
744 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
745 if (gspca_dev
->pkt_size
== 0)
746 psize
= (psize
& 0x07ff) * (1 + ((psize
>> 11) & 3));
748 psize
= gspca_dev
->pkt_size
;
749 npkt
= gspca_dev
->cam
.npkt
;
751 npkt
= 32; /* default value */
752 bsize
= psize
* npkt
;
754 "isoc %d pkts size %d = bsize:%d",
759 bsize
= gspca_dev
->cam
.bulk_size
;
762 PDEBUG(D_STREAM
, "bulk bsize:%d", bsize
);
763 if (gspca_dev
->cam
.bulk_nurbs
!= 0)
764 nurbs
= gspca_dev
->cam
.bulk_nurbs
;
769 for (n
= 0; n
< nurbs
; n
++) {
770 urb
= usb_alloc_urb(npkt
, GFP_KERNEL
);
772 pr_err("usb_alloc_urb failed\n");
775 gspca_dev
->urb
[n
] = urb
;
776 urb
->transfer_buffer
= usb_alloc_coherent(gspca_dev
->dev
,
781 if (urb
->transfer_buffer
== NULL
) {
782 pr_err("usb_alloc_coherent failed\n");
785 urb
->dev
= gspca_dev
->dev
;
786 urb
->context
= gspca_dev
;
787 urb
->transfer_buffer_length
= bsize
;
788 if (npkt
!= 0) { /* ISOC */
789 urb
->pipe
= usb_rcvisocpipe(gspca_dev
->dev
,
790 ep
->desc
.bEndpointAddress
);
791 urb
->transfer_flags
= URB_ISO_ASAP
792 | URB_NO_TRANSFER_DMA_MAP
;
793 if (gspca_dev
->dev
->speed
== USB_SPEED_LOW
)
794 urb
->interval
= ep
->desc
.bInterval
;
796 urb
->interval
= 1 << (ep
->desc
.bInterval
- 1);
797 urb
->complete
= isoc_irq
;
798 urb
->number_of_packets
= npkt
;
799 for (i
= 0; i
< npkt
; i
++) {
800 urb
->iso_frame_desc
[i
].length
= psize
;
801 urb
->iso_frame_desc
[i
].offset
= psize
* i
;
804 urb
->pipe
= usb_rcvbulkpipe(gspca_dev
->dev
,
805 ep
->desc
.bEndpointAddress
);
806 urb
->transfer_flags
= URB_NO_TRANSFER_DMA_MAP
;
807 urb
->complete
= bulk_irq
;
814 * start the USB transfer
816 static int gspca_init_transfer(struct gspca_dev
*gspca_dev
)
818 struct usb_interface
*intf
;
819 struct usb_host_endpoint
*ep
;
821 struct ep_tb_s ep_tb
[MAX_ALT
];
822 int n
, ret
, xfer
, alt
, alt_idx
;
824 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
827 if (!gspca_dev
->present
) {
832 /* reset the streaming variables */
833 gspca_dev
->image
= NULL
;
834 gspca_dev
->image_len
= 0;
835 gspca_dev
->last_packet_type
= DISCARD_PACKET
;
836 gspca_dev
->sequence
= 0;
838 gspca_dev
->usb_err
= 0;
840 /* do the specific subdriver stuff before endpoint selection */
841 intf
= usb_ifnum_to_if(gspca_dev
->dev
, gspca_dev
->iface
);
842 gspca_dev
->alt
= gspca_dev
->cam
.bulk
? intf
->num_altsetting
: 0;
843 if (gspca_dev
->sd_desc
->isoc_init
) {
844 ret
= gspca_dev
->sd_desc
->isoc_init(gspca_dev
);
848 xfer
= gspca_dev
->cam
.bulk
? USB_ENDPOINT_XFER_BULK
849 : USB_ENDPOINT_XFER_ISOC
;
851 /* if the subdriver forced an altsetting, get the endpoint */
852 if (gspca_dev
->alt
!= 0) {
853 gspca_dev
->alt
--; /* (previous version compatibility) */
854 ep
= alt_xfer(&intf
->altsetting
[gspca_dev
->alt
], xfer
);
856 pr_err("bad altsetting %d\n", gspca_dev
->alt
);
860 ep_tb
[0].alt
= gspca_dev
->alt
;
864 /* else, compute the minimum bandwidth
865 * and build the endpoint table */
866 alt_idx
= build_ep_tb(gspca_dev
, intf
, xfer
, ep_tb
);
868 pr_err("no transfer endpoint found\n");
874 /* set the highest alternate setting and
875 * loop until urb submit succeeds */
876 gspca_input_destroy_urb(gspca_dev
);
878 gspca_dev
->alt
= ep_tb
[--alt_idx
].alt
;
881 if (alt
!= gspca_dev
->alt
) {
882 alt
= gspca_dev
->alt
;
883 if (gspca_dev
->nbalt
> 1) {
884 ret
= usb_set_interface(gspca_dev
->dev
,
889 goto retry
; /*fixme: ugly*/
890 pr_err("set alt %d err %d\n", alt
, ret
);
895 if (!gspca_dev
->cam
.no_urb_create
) {
896 PDEBUG(D_STREAM
, "init transfer alt %d", alt
);
897 ret
= create_urbs(gspca_dev
,
898 alt_xfer(&intf
->altsetting
[alt
], xfer
));
900 destroy_urbs(gspca_dev
);
905 /* clear the bulk endpoint */
906 if (gspca_dev
->cam
.bulk
)
907 usb_clear_halt(gspca_dev
->dev
,
908 gspca_dev
->urb
[0]->pipe
);
911 ret
= gspca_dev
->sd_desc
->start(gspca_dev
);
913 destroy_urbs(gspca_dev
);
916 gspca_dev
->streaming
= 1;
918 /* some bulk transfers are started by the subdriver */
919 if (gspca_dev
->cam
.bulk
&& gspca_dev
->cam
.bulk_nurbs
== 0)
922 /* submit the URBs */
923 for (n
= 0; n
< MAX_NURBS
; n
++) {
924 urb
= gspca_dev
->urb
[n
];
927 ret
= usb_submit_urb(urb
, GFP_KERNEL
);
932 break; /* transfer is started */
934 /* something when wrong
935 * stop the webcam and free the transfer resources */
936 gspca_stream_off(gspca_dev
);
937 if (ret
!= -ENOSPC
) {
938 pr_err("usb_submit_urb alt %d err %d\n",
939 gspca_dev
->alt
, ret
);
943 /* the bandwidth is not wide enough
944 * negotiate or try a lower alternate setting */
946 PDEBUG(D_ERR
|D_STREAM
,
947 "alt %d - bandwidth not wide enough - trying again",
949 msleep(20); /* wait for kill complete */
950 if (gspca_dev
->sd_desc
->isoc_nego
) {
951 ret
= gspca_dev
->sd_desc
->isoc_nego(gspca_dev
);
956 pr_err("no transfer endpoint found\n");
960 gspca_dev
->alt
= ep_tb
[--alt_idx
].alt
;
964 gspca_input_create_urb(gspca_dev
);
966 mutex_unlock(&gspca_dev
->usb_lock
);
970 static void gspca_set_default_mode(struct gspca_dev
*gspca_dev
)
972 struct gspca_ctrl
*ctrl
;
975 i
= gspca_dev
->cam
.nmodes
- 1; /* take the highest mode */
976 gspca_dev
->curr_mode
= i
;
977 gspca_dev
->width
= gspca_dev
->cam
.cam_mode
[i
].width
;
978 gspca_dev
->height
= gspca_dev
->cam
.cam_mode
[i
].height
;
979 gspca_dev
->pixfmt
= gspca_dev
->cam
.cam_mode
[i
].pixelformat
;
981 /* set the current control values to their default values
982 * which may have changed in sd_init() */
983 ctrl
= gspca_dev
->cam
.ctrls
;
986 i
< gspca_dev
->sd_desc
->nctrls
;
988 ctrl
->val
= ctrl
->def
;
992 static int wxh_to_mode(struct gspca_dev
*gspca_dev
,
993 int width
, int height
)
997 for (i
= gspca_dev
->cam
.nmodes
; --i
> 0; ) {
998 if (width
>= gspca_dev
->cam
.cam_mode
[i
].width
999 && height
>= gspca_dev
->cam
.cam_mode
[i
].height
)
1006 * search a mode with the right pixel format
1008 static int gspca_get_mode(struct gspca_dev
*gspca_dev
,
1014 modeU
= modeD
= mode
;
1015 while ((modeU
< gspca_dev
->cam
.nmodes
) || modeD
>= 0) {
1017 if (gspca_dev
->cam
.cam_mode
[modeD
].pixelformat
1021 if (++modeU
< gspca_dev
->cam
.nmodes
) {
1022 if (gspca_dev
->cam
.cam_mode
[modeU
].pixelformat
1030 #ifdef CONFIG_VIDEO_ADV_DEBUG
1031 static int vidioc_g_register(struct file
*file
, void *priv
,
1032 struct v4l2_dbg_register
*reg
)
1035 struct gspca_dev
*gspca_dev
= priv
;
1037 if (!gspca_dev
->sd_desc
->get_chip_ident
)
1040 if (!gspca_dev
->sd_desc
->get_register
)
1043 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1044 return -ERESTARTSYS
;
1045 gspca_dev
->usb_err
= 0;
1046 if (gspca_dev
->present
)
1047 ret
= gspca_dev
->sd_desc
->get_register(gspca_dev
, reg
);
1050 mutex_unlock(&gspca_dev
->usb_lock
);
1055 static int vidioc_s_register(struct file
*file
, void *priv
,
1056 struct v4l2_dbg_register
*reg
)
1059 struct gspca_dev
*gspca_dev
= priv
;
1061 if (!gspca_dev
->sd_desc
->get_chip_ident
)
1064 if (!gspca_dev
->sd_desc
->set_register
)
1067 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1068 return -ERESTARTSYS
;
1069 gspca_dev
->usb_err
= 0;
1070 if (gspca_dev
->present
)
1071 ret
= gspca_dev
->sd_desc
->set_register(gspca_dev
, reg
);
1074 mutex_unlock(&gspca_dev
->usb_lock
);
1080 static int vidioc_g_chip_ident(struct file
*file
, void *priv
,
1081 struct v4l2_dbg_chip_ident
*chip
)
1084 struct gspca_dev
*gspca_dev
= priv
;
1086 if (!gspca_dev
->sd_desc
->get_chip_ident
)
1089 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1090 return -ERESTARTSYS
;
1091 gspca_dev
->usb_err
= 0;
1092 if (gspca_dev
->present
)
1093 ret
= gspca_dev
->sd_desc
->get_chip_ident(gspca_dev
, chip
);
1096 mutex_unlock(&gspca_dev
->usb_lock
);
1101 static int vidioc_enum_fmt_vid_cap(struct file
*file
, void *priv
,
1102 struct v4l2_fmtdesc
*fmtdesc
)
1104 struct gspca_dev
*gspca_dev
= priv
;
1108 /* give an index to each format */
1111 for (i
= gspca_dev
->cam
.nmodes
; --i
>= 0; ) {
1112 fmt_tb
[index
] = gspca_dev
->cam
.cam_mode
[i
].pixelformat
;
1115 if (fmt_tb
[j
] == fmt_tb
[index
])
1120 if (fmtdesc
->index
== index
)
1121 break; /* new format */
1123 if (index
>= ARRAY_SIZE(fmt_tb
))
1128 return -EINVAL
; /* no more format */
1130 fmtdesc
->pixelformat
= fmt_tb
[index
];
1131 if (gspca_dev
->cam
.cam_mode
[i
].sizeimage
<
1132 gspca_dev
->cam
.cam_mode
[i
].width
*
1133 gspca_dev
->cam
.cam_mode
[i
].height
)
1134 fmtdesc
->flags
= V4L2_FMT_FLAG_COMPRESSED
;
1135 fmtdesc
->description
[0] = fmtdesc
->pixelformat
& 0xff;
1136 fmtdesc
->description
[1] = (fmtdesc
->pixelformat
>> 8) & 0xff;
1137 fmtdesc
->description
[2] = (fmtdesc
->pixelformat
>> 16) & 0xff;
1138 fmtdesc
->description
[3] = fmtdesc
->pixelformat
>> 24;
1139 fmtdesc
->description
[4] = '\0';
1143 static int vidioc_g_fmt_vid_cap(struct file
*file
, void *priv
,
1144 struct v4l2_format
*fmt
)
1146 struct gspca_dev
*gspca_dev
= priv
;
1149 mode
= gspca_dev
->curr_mode
;
1150 memcpy(&fmt
->fmt
.pix
, &gspca_dev
->cam
.cam_mode
[mode
],
1151 sizeof fmt
->fmt
.pix
);
1155 static int try_fmt_vid_cap(struct gspca_dev
*gspca_dev
,
1156 struct v4l2_format
*fmt
)
1158 int w
, h
, mode
, mode2
;
1160 w
= fmt
->fmt
.pix
.width
;
1161 h
= fmt
->fmt
.pix
.height
;
1164 if (gspca_debug
& D_CONF
)
1165 PDEBUG_MODE("try fmt cap", fmt
->fmt
.pix
.pixelformat
, w
, h
);
1167 /* search the closest mode for width and height */
1168 mode
= wxh_to_mode(gspca_dev
, w
, h
);
1170 /* OK if right palette */
1171 if (gspca_dev
->cam
.cam_mode
[mode
].pixelformat
1172 != fmt
->fmt
.pix
.pixelformat
) {
1174 /* else, search the closest mode with the same pixel format */
1175 mode2
= gspca_get_mode(gspca_dev
, mode
,
1176 fmt
->fmt
.pix
.pixelformat
);
1180 ; * no chance, return this mode */
1182 memcpy(&fmt
->fmt
.pix
, &gspca_dev
->cam
.cam_mode
[mode
],
1183 sizeof fmt
->fmt
.pix
);
1184 return mode
; /* used when s_fmt */
1187 static int vidioc_try_fmt_vid_cap(struct file
*file
,
1189 struct v4l2_format
*fmt
)
1191 struct gspca_dev
*gspca_dev
= priv
;
1194 ret
= try_fmt_vid_cap(gspca_dev
, fmt
);
1200 static int vidioc_s_fmt_vid_cap(struct file
*file
, void *priv
,
1201 struct v4l2_format
*fmt
)
1203 struct gspca_dev
*gspca_dev
= priv
;
1206 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1207 return -ERESTARTSYS
;
1209 ret
= try_fmt_vid_cap(gspca_dev
, fmt
);
1213 if (gspca_dev
->nframes
!= 0
1214 && fmt
->fmt
.pix
.sizeimage
> gspca_dev
->frsz
) {
1219 if (ret
== gspca_dev
->curr_mode
) {
1221 goto out
; /* same mode */
1224 if (gspca_dev
->streaming
) {
1228 gspca_dev
->width
= fmt
->fmt
.pix
.width
;
1229 gspca_dev
->height
= fmt
->fmt
.pix
.height
;
1230 gspca_dev
->pixfmt
= fmt
->fmt
.pix
.pixelformat
;
1231 gspca_dev
->curr_mode
= ret
;
1235 mutex_unlock(&gspca_dev
->queue_lock
);
1239 static int vidioc_enum_framesizes(struct file
*file
, void *priv
,
1240 struct v4l2_frmsizeenum
*fsize
)
1242 struct gspca_dev
*gspca_dev
= priv
;
1246 for (i
= 0; i
< gspca_dev
->cam
.nmodes
; i
++) {
1247 if (fsize
->pixel_format
!=
1248 gspca_dev
->cam
.cam_mode
[i
].pixelformat
)
1251 if (fsize
->index
== index
) {
1252 fsize
->type
= V4L2_FRMSIZE_TYPE_DISCRETE
;
1253 fsize
->discrete
.width
=
1254 gspca_dev
->cam
.cam_mode
[i
].width
;
1255 fsize
->discrete
.height
=
1256 gspca_dev
->cam
.cam_mode
[i
].height
;
1265 static int vidioc_enum_frameintervals(struct file
*filp
, void *priv
,
1266 struct v4l2_frmivalenum
*fival
)
1268 struct gspca_dev
*gspca_dev
= priv
;
1269 int mode
= wxh_to_mode(gspca_dev
, fival
->width
, fival
->height
);
1272 if (gspca_dev
->cam
.mode_framerates
== NULL
||
1273 gspca_dev
->cam
.mode_framerates
[mode
].nrates
== 0)
1276 if (fival
->pixel_format
!=
1277 gspca_dev
->cam
.cam_mode
[mode
].pixelformat
)
1280 for (i
= 0; i
< gspca_dev
->cam
.mode_framerates
[mode
].nrates
; i
++) {
1281 if (fival
->index
== i
) {
1282 fival
->type
= V4L2_FRMSIZE_TYPE_DISCRETE
;
1283 fival
->discrete
.numerator
= 1;
1284 fival
->discrete
.denominator
=
1285 gspca_dev
->cam
.mode_framerates
[mode
].rates
[i
];
1293 static void gspca_release(struct video_device
*vfd
)
1295 struct gspca_dev
*gspca_dev
= container_of(vfd
, struct gspca_dev
, vdev
);
1297 PDEBUG(D_PROBE
, "%s released",
1298 video_device_node_name(&gspca_dev
->vdev
));
1300 kfree(gspca_dev
->usb_buf
);
1304 static int dev_open(struct file
*file
)
1306 struct gspca_dev
*gspca_dev
;
1308 PDEBUG(D_STREAM
, "[%s] open", current
->comm
);
1309 gspca_dev
= (struct gspca_dev
*) video_devdata(file
);
1310 if (!gspca_dev
->present
)
1313 /* protect the subdriver against rmmod */
1314 if (!try_module_get(gspca_dev
->module
))
1317 file
->private_data
= gspca_dev
;
1319 /* activate the v4l2 debug */
1320 if (gspca_debug
& D_V4L2
)
1321 gspca_dev
->vdev
.debug
|= V4L2_DEBUG_IOCTL
1322 | V4L2_DEBUG_IOCTL_ARG
;
1324 gspca_dev
->vdev
.debug
&= ~(V4L2_DEBUG_IOCTL
1325 | V4L2_DEBUG_IOCTL_ARG
);
1330 static int dev_close(struct file
*file
)
1332 struct gspca_dev
*gspca_dev
= file
->private_data
;
1334 PDEBUG(D_STREAM
, "[%s] close", current
->comm
);
1335 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1336 return -ERESTARTSYS
;
1338 /* if the file did the capture, free the streaming resources */
1339 if (gspca_dev
->capt_file
== file
) {
1340 if (gspca_dev
->streaming
) {
1341 mutex_lock(&gspca_dev
->usb_lock
);
1342 gspca_dev
->usb_err
= 0;
1343 gspca_stream_off(gspca_dev
);
1344 mutex_unlock(&gspca_dev
->usb_lock
);
1346 frame_free(gspca_dev
);
1348 file
->private_data
= NULL
;
1349 module_put(gspca_dev
->module
);
1350 mutex_unlock(&gspca_dev
->queue_lock
);
1352 PDEBUG(D_STREAM
, "close done");
1357 static int vidioc_querycap(struct file
*file
, void *priv
,
1358 struct v4l2_capability
*cap
)
1360 struct gspca_dev
*gspca_dev
= priv
;
1363 /* protect the access to the usb device */
1364 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1365 return -ERESTARTSYS
;
1366 if (!gspca_dev
->present
) {
1370 strlcpy((char *) cap
->driver
, gspca_dev
->sd_desc
->name
,
1371 sizeof cap
->driver
);
1372 if (gspca_dev
->dev
->product
!= NULL
) {
1373 strlcpy((char *) cap
->card
, gspca_dev
->dev
->product
,
1376 snprintf((char *) cap
->card
, sizeof cap
->card
,
1377 "USB Camera (%04x:%04x)",
1378 le16_to_cpu(gspca_dev
->dev
->descriptor
.idVendor
),
1379 le16_to_cpu(gspca_dev
->dev
->descriptor
.idProduct
));
1381 usb_make_path(gspca_dev
->dev
, (char *) cap
->bus_info
,
1382 sizeof(cap
->bus_info
));
1383 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
1384 | V4L2_CAP_STREAMING
1385 | V4L2_CAP_READWRITE
;
1388 mutex_unlock(&gspca_dev
->usb_lock
);
1392 static int get_ctrl(struct gspca_dev
*gspca_dev
,
1395 const struct ctrl
*ctrls
;
1398 for (i
= 0, ctrls
= gspca_dev
->sd_desc
->ctrls
;
1399 i
< gspca_dev
->sd_desc
->nctrls
;
1401 if (gspca_dev
->ctrl_dis
& (1 << i
))
1403 if (id
== ctrls
->qctrl
.id
)
1409 static int vidioc_queryctrl(struct file
*file
, void *priv
,
1410 struct v4l2_queryctrl
*q_ctrl
)
1412 struct gspca_dev
*gspca_dev
= priv
;
1413 const struct ctrl
*ctrls
;
1414 struct gspca_ctrl
*gspca_ctrl
;
1419 if (id
& V4L2_CTRL_FLAG_NEXT_CTRL
) {
1420 id
&= V4L2_CTRL_ID_MASK
;
1423 for (i
= 0; i
< gspca_dev
->sd_desc
->nctrls
; i
++) {
1424 if (gspca_dev
->ctrl_dis
& (1 << i
))
1426 if (gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.id
< id
)
1429 && gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.id
1430 > gspca_dev
->sd_desc
->ctrls
[idx
].qctrl
.id
)
1435 idx
= get_ctrl(gspca_dev
, id
);
1439 ctrls
= &gspca_dev
->sd_desc
->ctrls
[idx
];
1440 memcpy(q_ctrl
, &ctrls
->qctrl
, sizeof *q_ctrl
);
1441 if (gspca_dev
->cam
.ctrls
!= NULL
) {
1442 gspca_ctrl
= &gspca_dev
->cam
.ctrls
[idx
];
1443 q_ctrl
->default_value
= gspca_ctrl
->def
;
1444 q_ctrl
->minimum
= gspca_ctrl
->min
;
1445 q_ctrl
->maximum
= gspca_ctrl
->max
;
1447 if (gspca_dev
->ctrl_inac
& (1 << idx
))
1448 q_ctrl
->flags
|= V4L2_CTRL_FLAG_INACTIVE
;
1452 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
1453 struct v4l2_control
*ctrl
)
1455 struct gspca_dev
*gspca_dev
= priv
;
1456 const struct ctrl
*ctrls
;
1457 struct gspca_ctrl
*gspca_ctrl
;
1460 idx
= get_ctrl(gspca_dev
, ctrl
->id
);
1463 if (gspca_dev
->ctrl_inac
& (1 << idx
))
1465 ctrls
= &gspca_dev
->sd_desc
->ctrls
[idx
];
1466 if (gspca_dev
->cam
.ctrls
!= NULL
) {
1467 gspca_ctrl
= &gspca_dev
->cam
.ctrls
[idx
];
1468 if (ctrl
->value
< gspca_ctrl
->min
1469 || ctrl
->value
> gspca_ctrl
->max
)
1473 if (ctrl
->value
< ctrls
->qctrl
.minimum
1474 || ctrl
->value
> ctrls
->qctrl
.maximum
)
1477 PDEBUG(D_CONF
, "set ctrl [%08x] = %d", ctrl
->id
, ctrl
->value
);
1478 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1479 return -ERESTARTSYS
;
1480 if (!gspca_dev
->present
) {
1484 gspca_dev
->usb_err
= 0;
1485 if (ctrls
->set
!= NULL
) {
1486 ret
= ctrls
->set(gspca_dev
, ctrl
->value
);
1489 if (gspca_ctrl
!= NULL
) {
1490 gspca_ctrl
->val
= ctrl
->value
;
1491 if (ctrls
->set_control
!= NULL
1492 && gspca_dev
->streaming
)
1493 ctrls
->set_control(gspca_dev
);
1495 ret
= gspca_dev
->usb_err
;
1497 mutex_unlock(&gspca_dev
->usb_lock
);
1501 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
1502 struct v4l2_control
*ctrl
)
1504 struct gspca_dev
*gspca_dev
= priv
;
1505 const struct ctrl
*ctrls
;
1508 idx
= get_ctrl(gspca_dev
, ctrl
->id
);
1511 ctrls
= &gspca_dev
->sd_desc
->ctrls
[idx
];
1513 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1514 return -ERESTARTSYS
;
1515 if (!gspca_dev
->present
) {
1519 gspca_dev
->usb_err
= 0;
1520 if (ctrls
->get
!= NULL
) {
1521 ret
= ctrls
->get(gspca_dev
, &ctrl
->value
);
1524 if (gspca_dev
->cam
.ctrls
!= NULL
)
1525 ctrl
->value
= gspca_dev
->cam
.ctrls
[idx
].val
;
1528 mutex_unlock(&gspca_dev
->usb_lock
);
1532 static int vidioc_querymenu(struct file
*file
, void *priv
,
1533 struct v4l2_querymenu
*qmenu
)
1535 struct gspca_dev
*gspca_dev
= priv
;
1537 if (!gspca_dev
->sd_desc
->querymenu
)
1539 return gspca_dev
->sd_desc
->querymenu(gspca_dev
, qmenu
);
1542 static int vidioc_enum_input(struct file
*file
, void *priv
,
1543 struct v4l2_input
*input
)
1545 struct gspca_dev
*gspca_dev
= priv
;
1547 if (input
->index
!= 0)
1549 input
->type
= V4L2_INPUT_TYPE_CAMERA
;
1550 input
->status
= gspca_dev
->cam
.input_flags
;
1551 strlcpy(input
->name
, gspca_dev
->sd_desc
->name
,
1552 sizeof input
->name
);
1556 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
1562 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
1569 static int vidioc_reqbufs(struct file
*file
, void *priv
,
1570 struct v4l2_requestbuffers
*rb
)
1572 struct gspca_dev
*gspca_dev
= priv
;
1573 int i
, ret
= 0, streaming
;
1575 i
= rb
->memory
; /* (avoid compilation warning) */
1577 case GSPCA_MEMORY_READ
: /* (internal call) */
1578 case V4L2_MEMORY_MMAP
:
1579 case V4L2_MEMORY_USERPTR
:
1584 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1585 return -ERESTARTSYS
;
1587 if (gspca_dev
->memory
!= GSPCA_MEMORY_NO
1588 && gspca_dev
->memory
!= GSPCA_MEMORY_READ
1589 && gspca_dev
->memory
!= rb
->memory
) {
1594 /* only one file may do the capture */
1595 if (gspca_dev
->capt_file
!= NULL
1596 && gspca_dev
->capt_file
!= file
) {
1601 /* if allocated, the buffers must not be mapped */
1602 for (i
= 0; i
< gspca_dev
->nframes
; i
++) {
1603 if (gspca_dev
->frame
[i
].vma_use_count
) {
1609 /* stop streaming */
1610 streaming
= gspca_dev
->streaming
;
1612 mutex_lock(&gspca_dev
->usb_lock
);
1613 gspca_dev
->usb_err
= 0;
1614 gspca_stream_off(gspca_dev
);
1615 mutex_unlock(&gspca_dev
->usb_lock
);
1617 /* Don't restart the stream when switching from read
1619 if (gspca_dev
->memory
== GSPCA_MEMORY_READ
)
1623 /* free the previous allocated buffers, if any */
1624 if (gspca_dev
->nframes
!= 0)
1625 frame_free(gspca_dev
);
1626 if (rb
->count
== 0) /* unrequest */
1628 ret
= frame_alloc(gspca_dev
, file
, rb
->memory
, rb
->count
);
1630 rb
->count
= gspca_dev
->nframes
;
1632 ret
= gspca_init_transfer(gspca_dev
);
1635 mutex_unlock(&gspca_dev
->queue_lock
);
1636 PDEBUG(D_STREAM
, "reqbufs st:%d c:%d", ret
, rb
->count
);
1640 static int vidioc_querybuf(struct file
*file
, void *priv
,
1641 struct v4l2_buffer
*v4l2_buf
)
1643 struct gspca_dev
*gspca_dev
= priv
;
1644 struct gspca_frame
*frame
;
1646 if (v4l2_buf
->index
< 0
1647 || v4l2_buf
->index
>= gspca_dev
->nframes
)
1650 frame
= &gspca_dev
->frame
[v4l2_buf
->index
];
1651 memcpy(v4l2_buf
, &frame
->v4l2_buf
, sizeof *v4l2_buf
);
1655 static int vidioc_streamon(struct file
*file
, void *priv
,
1656 enum v4l2_buf_type buf_type
)
1658 struct gspca_dev
*gspca_dev
= priv
;
1661 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1663 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1664 return -ERESTARTSYS
;
1666 /* check the capture file */
1667 if (gspca_dev
->capt_file
!= file
) {
1672 if (gspca_dev
->nframes
== 0
1673 || !(gspca_dev
->frame
[0].v4l2_buf
.flags
& V4L2_BUF_FLAG_QUEUED
)) {
1677 if (!gspca_dev
->streaming
) {
1678 ret
= gspca_init_transfer(gspca_dev
);
1683 if (gspca_debug
& D_STREAM
) {
1684 PDEBUG_MODE("stream on OK",
1692 mutex_unlock(&gspca_dev
->queue_lock
);
1696 static int vidioc_streamoff(struct file
*file
, void *priv
,
1697 enum v4l2_buf_type buf_type
)
1699 struct gspca_dev
*gspca_dev
= priv
;
1702 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1705 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1706 return -ERESTARTSYS
;
1708 if (!gspca_dev
->streaming
) {
1713 /* check the capture file */
1714 if (gspca_dev
->capt_file
!= file
) {
1719 /* stop streaming */
1720 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
)) {
1724 gspca_dev
->usb_err
= 0;
1725 gspca_stream_off(gspca_dev
);
1726 mutex_unlock(&gspca_dev
->usb_lock
);
1727 /* In case another thread is waiting in dqbuf */
1728 wake_up_interruptible(&gspca_dev
->wq
);
1730 /* empty the transfer queues */
1731 atomic_set(&gspca_dev
->fr_q
, 0);
1732 atomic_set(&gspca_dev
->fr_i
, 0);
1733 gspca_dev
->fr_o
= 0;
1736 mutex_unlock(&gspca_dev
->queue_lock
);
1740 static int vidioc_g_jpegcomp(struct file
*file
, void *priv
,
1741 struct v4l2_jpegcompression
*jpegcomp
)
1743 struct gspca_dev
*gspca_dev
= priv
;
1746 if (!gspca_dev
->sd_desc
->get_jcomp
)
1748 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1749 return -ERESTARTSYS
;
1750 gspca_dev
->usb_err
= 0;
1751 if (gspca_dev
->present
)
1752 ret
= gspca_dev
->sd_desc
->get_jcomp(gspca_dev
, jpegcomp
);
1755 mutex_unlock(&gspca_dev
->usb_lock
);
1759 static int vidioc_s_jpegcomp(struct file
*file
, void *priv
,
1760 struct v4l2_jpegcompression
*jpegcomp
)
1762 struct gspca_dev
*gspca_dev
= priv
;
1765 if (!gspca_dev
->sd_desc
->set_jcomp
)
1767 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1768 return -ERESTARTSYS
;
1769 gspca_dev
->usb_err
= 0;
1770 if (gspca_dev
->present
)
1771 ret
= gspca_dev
->sd_desc
->set_jcomp(gspca_dev
, jpegcomp
);
1774 mutex_unlock(&gspca_dev
->usb_lock
);
1778 static int vidioc_g_parm(struct file
*filp
, void *priv
,
1779 struct v4l2_streamparm
*parm
)
1781 struct gspca_dev
*gspca_dev
= priv
;
1783 parm
->parm
.capture
.readbuffers
= gspca_dev
->nbufread
;
1785 if (gspca_dev
->sd_desc
->get_streamparm
) {
1788 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1789 return -ERESTARTSYS
;
1790 if (gspca_dev
->present
) {
1791 gspca_dev
->usb_err
= 0;
1792 gspca_dev
->sd_desc
->get_streamparm(gspca_dev
, parm
);
1793 ret
= gspca_dev
->usb_err
;
1797 mutex_unlock(&gspca_dev
->usb_lock
);
1804 static int vidioc_s_parm(struct file
*filp
, void *priv
,
1805 struct v4l2_streamparm
*parm
)
1807 struct gspca_dev
*gspca_dev
= priv
;
1810 n
= parm
->parm
.capture
.readbuffers
;
1811 if (n
== 0 || n
>= GSPCA_MAX_FRAMES
)
1812 parm
->parm
.capture
.readbuffers
= gspca_dev
->nbufread
;
1814 gspca_dev
->nbufread
= n
;
1816 if (gspca_dev
->sd_desc
->set_streamparm
) {
1819 if (mutex_lock_interruptible(&gspca_dev
->usb_lock
))
1820 return -ERESTARTSYS
;
1821 if (gspca_dev
->present
) {
1822 gspca_dev
->usb_err
= 0;
1823 gspca_dev
->sd_desc
->set_streamparm(gspca_dev
, parm
);
1824 ret
= gspca_dev
->usb_err
;
1828 mutex_unlock(&gspca_dev
->usb_lock
);
1835 static int dev_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1837 struct gspca_dev
*gspca_dev
= file
->private_data
;
1838 struct gspca_frame
*frame
;
1840 unsigned long addr
, start
, size
;
1843 start
= vma
->vm_start
;
1844 size
= vma
->vm_end
- vma
->vm_start
;
1845 PDEBUG(D_STREAM
, "mmap start:%08x size:%d", (int) start
, (int) size
);
1847 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1848 return -ERESTARTSYS
;
1849 if (!gspca_dev
->present
) {
1853 if (gspca_dev
->capt_file
!= file
) {
1859 for (i
= 0; i
< gspca_dev
->nframes
; ++i
) {
1860 if (gspca_dev
->frame
[i
].v4l2_buf
.memory
!= V4L2_MEMORY_MMAP
) {
1861 PDEBUG(D_STREAM
, "mmap bad memory type");
1864 if ((gspca_dev
->frame
[i
].v4l2_buf
.m
.offset
>> PAGE_SHIFT
)
1866 frame
= &gspca_dev
->frame
[i
];
1870 if (frame
== NULL
) {
1871 PDEBUG(D_STREAM
, "mmap no frame buffer found");
1875 if (size
!= frame
->v4l2_buf
.length
) {
1876 PDEBUG(D_STREAM
, "mmap bad size");
1882 * - VM_IO marks the area as being a mmaped region for I/O to a
1883 * device. It also prevents the region from being core dumped.
1885 vma
->vm_flags
|= VM_IO
;
1887 addr
= (unsigned long) frame
->data
;
1889 page
= vmalloc_to_page((void *) addr
);
1890 ret
= vm_insert_page(vma
, start
, page
);
1898 vma
->vm_ops
= &gspca_vm_ops
;
1899 vma
->vm_private_data
= frame
;
1903 mutex_unlock(&gspca_dev
->queue_lock
);
1907 static int frame_ready_nolock(struct gspca_dev
*gspca_dev
, struct file
*file
,
1908 enum v4l2_memory memory
)
1910 if (!gspca_dev
->present
)
1912 if (gspca_dev
->capt_file
!= file
|| gspca_dev
->memory
!= memory
||
1913 !gspca_dev
->streaming
)
1916 /* check if a frame is ready */
1917 return gspca_dev
->fr_o
!= atomic_read(&gspca_dev
->fr_i
);
1920 static int frame_ready(struct gspca_dev
*gspca_dev
, struct file
*file
,
1921 enum v4l2_memory memory
)
1925 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1926 return -ERESTARTSYS
;
1927 ret
= frame_ready_nolock(gspca_dev
, file
, memory
);
1928 mutex_unlock(&gspca_dev
->queue_lock
);
1933 * dequeue a video buffer
1935 * If nonblock_ing is false, block until a buffer is available.
1937 static int vidioc_dqbuf(struct file
*file
, void *priv
,
1938 struct v4l2_buffer
*v4l2_buf
)
1940 struct gspca_dev
*gspca_dev
= priv
;
1941 struct gspca_frame
*frame
;
1944 PDEBUG(D_FRAM
, "dqbuf");
1946 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1947 return -ERESTARTSYS
;
1950 ret
= frame_ready_nolock(gspca_dev
, file
, v4l2_buf
->memory
);
1956 mutex_unlock(&gspca_dev
->queue_lock
);
1958 if (file
->f_flags
& O_NONBLOCK
)
1961 /* wait till a frame is ready */
1962 ret
= wait_event_interruptible_timeout(gspca_dev
->wq
,
1963 frame_ready(gspca_dev
, file
, v4l2_buf
->memory
),
1964 msecs_to_jiffies(3000));
1970 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
1971 return -ERESTARTSYS
;
1974 i
= gspca_dev
->fr_o
;
1975 j
= gspca_dev
->fr_queue
[i
];
1976 frame
= &gspca_dev
->frame
[j
];
1978 gspca_dev
->fr_o
= (i
+ 1) % GSPCA_MAX_FRAMES
;
1980 if (gspca_dev
->sd_desc
->dq_callback
) {
1981 mutex_lock(&gspca_dev
->usb_lock
);
1982 gspca_dev
->usb_err
= 0;
1983 if (gspca_dev
->present
)
1984 gspca_dev
->sd_desc
->dq_callback(gspca_dev
);
1985 mutex_unlock(&gspca_dev
->usb_lock
);
1988 frame
->v4l2_buf
.flags
&= ~V4L2_BUF_FLAG_DONE
;
1989 memcpy(v4l2_buf
, &frame
->v4l2_buf
, sizeof *v4l2_buf
);
1990 PDEBUG(D_FRAM
, "dqbuf %d", j
);
1993 if (gspca_dev
->memory
== V4L2_MEMORY_USERPTR
) {
1994 if (copy_to_user((__u8 __user
*) frame
->v4l2_buf
.m
.userptr
,
1996 frame
->v4l2_buf
.bytesused
)) {
1997 PDEBUG(D_ERR
|D_STREAM
,
1998 "dqbuf cp to user failed");
2003 mutex_unlock(&gspca_dev
->queue_lock
);
2008 * queue a video buffer
2010 * Attempting to queue a buffer that has already been
2011 * queued will return -EINVAL.
2013 static int vidioc_qbuf(struct file
*file
, void *priv
,
2014 struct v4l2_buffer
*v4l2_buf
)
2016 struct gspca_dev
*gspca_dev
= priv
;
2017 struct gspca_frame
*frame
;
2020 PDEBUG(D_FRAM
, "qbuf %d", v4l2_buf
->index
);
2022 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
))
2023 return -ERESTARTSYS
;
2025 index
= v4l2_buf
->index
;
2026 if ((unsigned) index
>= gspca_dev
->nframes
) {
2028 "qbuf idx %d >= %d", index
, gspca_dev
->nframes
);
2032 if (v4l2_buf
->memory
!= gspca_dev
->memory
) {
2033 PDEBUG(D_FRAM
, "qbuf bad memory type");
2038 frame
= &gspca_dev
->frame
[index
];
2039 if (frame
->v4l2_buf
.flags
& BUF_ALL_FLAGS
) {
2040 PDEBUG(D_FRAM
, "qbuf bad state");
2045 frame
->v4l2_buf
.flags
|= V4L2_BUF_FLAG_QUEUED
;
2047 if (frame
->v4l2_buf
.memory
== V4L2_MEMORY_USERPTR
) {
2048 frame
->v4l2_buf
.m
.userptr
= v4l2_buf
->m
.userptr
;
2049 frame
->v4l2_buf
.length
= v4l2_buf
->length
;
2052 /* put the buffer in the 'queued' queue */
2053 i
= atomic_read(&gspca_dev
->fr_q
);
2054 gspca_dev
->fr_queue
[i
] = index
;
2055 atomic_set(&gspca_dev
->fr_q
, (i
+ 1) % GSPCA_MAX_FRAMES
);
2057 v4l2_buf
->flags
|= V4L2_BUF_FLAG_QUEUED
;
2058 v4l2_buf
->flags
&= ~V4L2_BUF_FLAG_DONE
;
2061 mutex_unlock(&gspca_dev
->queue_lock
);
2066 * allocate the resources for read()
2068 static int read_alloc(struct gspca_dev
*gspca_dev
,
2071 struct v4l2_buffer v4l2_buf
;
2074 PDEBUG(D_STREAM
, "read alloc");
2075 if (gspca_dev
->nframes
== 0) {
2076 struct v4l2_requestbuffers rb
;
2078 memset(&rb
, 0, sizeof rb
);
2079 rb
.count
= gspca_dev
->nbufread
;
2080 rb
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
2081 rb
.memory
= GSPCA_MEMORY_READ
;
2082 ret
= vidioc_reqbufs(file
, gspca_dev
, &rb
);
2084 PDEBUG(D_STREAM
, "read reqbuf err %d", ret
);
2087 memset(&v4l2_buf
, 0, sizeof v4l2_buf
);
2088 v4l2_buf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
2089 v4l2_buf
.memory
= GSPCA_MEMORY_READ
;
2090 for (i
= 0; i
< gspca_dev
->nbufread
; i
++) {
2092 ret
= vidioc_qbuf(file
, gspca_dev
, &v4l2_buf
);
2094 PDEBUG(D_STREAM
, "read qbuf err: %d", ret
);
2098 gspca_dev
->memory
= GSPCA_MEMORY_READ
;
2101 /* start streaming */
2102 ret
= vidioc_streamon(file
, gspca_dev
, V4L2_BUF_TYPE_VIDEO_CAPTURE
);
2104 PDEBUG(D_STREAM
, "read streamon err %d", ret
);
2108 static unsigned int dev_poll(struct file
*file
, poll_table
*wait
)
2110 struct gspca_dev
*gspca_dev
= file
->private_data
;
2113 PDEBUG(D_FRAM
, "poll");
2115 poll_wait(file
, &gspca_dev
->wq
, wait
);
2117 /* if reqbufs is not done, the user would use read() */
2118 if (gspca_dev
->memory
== GSPCA_MEMORY_NO
) {
2119 ret
= read_alloc(gspca_dev
, file
);
2124 if (mutex_lock_interruptible(&gspca_dev
->queue_lock
) != 0)
2127 /* check if an image has been received */
2128 if (gspca_dev
->fr_o
!= atomic_read(&gspca_dev
->fr_i
))
2129 ret
= POLLIN
| POLLRDNORM
; /* yes */
2132 mutex_unlock(&gspca_dev
->queue_lock
);
2133 if (!gspca_dev
->present
)
2138 static ssize_t
dev_read(struct file
*file
, char __user
*data
,
2139 size_t count
, loff_t
*ppos
)
2141 struct gspca_dev
*gspca_dev
= file
->private_data
;
2142 struct gspca_frame
*frame
;
2143 struct v4l2_buffer v4l2_buf
;
2144 struct timeval timestamp
;
2147 PDEBUG(D_FRAM
, "read (%zd)", count
);
2148 if (!gspca_dev
->present
)
2150 if (gspca_dev
->memory
== GSPCA_MEMORY_NO
) { /* first time ? */
2151 ret
= read_alloc(gspca_dev
, file
);
2157 timestamp
= ktime_to_timeval(ktime_get());
2161 memset(&v4l2_buf
, 0, sizeof v4l2_buf
);
2162 v4l2_buf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
2163 v4l2_buf
.memory
= GSPCA_MEMORY_READ
;
2164 ret
= vidioc_dqbuf(file
, gspca_dev
, &v4l2_buf
);
2166 PDEBUG(D_STREAM
, "read dqbuf err %d", ret
);
2170 /* if the process slept for more than 1 second,
2171 * get a newer frame */
2172 frame
= &gspca_dev
->frame
[v4l2_buf
.index
];
2174 break; /* avoid infinite loop */
2175 if (frame
->v4l2_buf
.timestamp
.tv_sec
>= timestamp
.tv_sec
)
2177 ret
= vidioc_qbuf(file
, gspca_dev
, &v4l2_buf
);
2179 PDEBUG(D_STREAM
, "read qbuf err %d", ret
);
2184 /* copy the frame */
2185 if (count
> frame
->v4l2_buf
.bytesused
)
2186 count
= frame
->v4l2_buf
.bytesused
;
2187 ret
= copy_to_user(data
, frame
->data
, count
);
2189 PDEBUG(D_ERR
|D_STREAM
,
2190 "read cp to user lack %d / %zd", ret
, count
);
2196 /* in each case, requeue the buffer */
2197 ret2
= vidioc_qbuf(file
, gspca_dev
, &v4l2_buf
);
2203 static struct v4l2_file_operations dev_fops
= {
2204 .owner
= THIS_MODULE
,
2206 .release
= dev_close
,
2209 .unlocked_ioctl
= video_ioctl2
,
2213 static const struct v4l2_ioctl_ops dev_ioctl_ops
= {
2214 .vidioc_querycap
= vidioc_querycap
,
2215 .vidioc_dqbuf
= vidioc_dqbuf
,
2216 .vidioc_qbuf
= vidioc_qbuf
,
2217 .vidioc_enum_fmt_vid_cap
= vidioc_enum_fmt_vid_cap
,
2218 .vidioc_try_fmt_vid_cap
= vidioc_try_fmt_vid_cap
,
2219 .vidioc_g_fmt_vid_cap
= vidioc_g_fmt_vid_cap
,
2220 .vidioc_s_fmt_vid_cap
= vidioc_s_fmt_vid_cap
,
2221 .vidioc_streamon
= vidioc_streamon
,
2222 .vidioc_queryctrl
= vidioc_queryctrl
,
2223 .vidioc_g_ctrl
= vidioc_g_ctrl
,
2224 .vidioc_s_ctrl
= vidioc_s_ctrl
,
2225 .vidioc_querymenu
= vidioc_querymenu
,
2226 .vidioc_enum_input
= vidioc_enum_input
,
2227 .vidioc_g_input
= vidioc_g_input
,
2228 .vidioc_s_input
= vidioc_s_input
,
2229 .vidioc_reqbufs
= vidioc_reqbufs
,
2230 .vidioc_querybuf
= vidioc_querybuf
,
2231 .vidioc_streamoff
= vidioc_streamoff
,
2232 .vidioc_g_jpegcomp
= vidioc_g_jpegcomp
,
2233 .vidioc_s_jpegcomp
= vidioc_s_jpegcomp
,
2234 .vidioc_g_parm
= vidioc_g_parm
,
2235 .vidioc_s_parm
= vidioc_s_parm
,
2236 .vidioc_enum_framesizes
= vidioc_enum_framesizes
,
2237 .vidioc_enum_frameintervals
= vidioc_enum_frameintervals
,
2238 #ifdef CONFIG_VIDEO_ADV_DEBUG
2239 .vidioc_g_register
= vidioc_g_register
,
2240 .vidioc_s_register
= vidioc_s_register
,
2242 .vidioc_g_chip_ident
= vidioc_g_chip_ident
,
2245 static const struct video_device gspca_template
= {
2246 .name
= "gspca main driver",
2248 .ioctl_ops
= &dev_ioctl_ops
,
2249 .release
= gspca_release
,
2252 /* initialize the controls */
2253 static void ctrls_init(struct gspca_dev
*gspca_dev
)
2255 struct gspca_ctrl
*ctrl
;
2258 for (i
= 0, ctrl
= gspca_dev
->cam
.ctrls
;
2259 i
< gspca_dev
->sd_desc
->nctrls
;
2261 ctrl
->def
= gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.default_value
;
2262 ctrl
->val
= ctrl
->def
;
2263 ctrl
->min
= gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.minimum
;
2264 ctrl
->max
= gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.maximum
;
2269 * probe and create a new gspca device
2271 * This function must be called by the sub-driver when it is
2272 * called for probing a new device.
2274 int gspca_dev_probe2(struct usb_interface
*intf
,
2275 const struct usb_device_id
*id
,
2276 const struct sd_desc
*sd_desc
,
2278 struct module
*module
)
2280 struct gspca_dev
*gspca_dev
;
2281 struct usb_device
*dev
= interface_to_usbdev(intf
);
2284 pr_info("%s-" GSPCA_VERSION
" probing %04x:%04x\n",
2285 sd_desc
->name
, id
->idVendor
, id
->idProduct
);
2287 /* create the device */
2288 if (dev_size
< sizeof *gspca_dev
)
2289 dev_size
= sizeof *gspca_dev
;
2290 gspca_dev
= kzalloc(dev_size
, GFP_KERNEL
);
2292 pr_err("couldn't kzalloc gspca struct\n");
2295 gspca_dev
->usb_buf
= kmalloc(USB_BUF_SZ
, GFP_KERNEL
);
2296 if (!gspca_dev
->usb_buf
) {
2297 pr_err("out of memory\n");
2301 gspca_dev
->dev
= dev
;
2302 gspca_dev
->iface
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
2303 gspca_dev
->nbalt
= intf
->num_altsetting
;
2305 /* check if any audio device */
2306 if (dev
->config
->desc
.bNumInterfaces
!= 1) {
2308 struct usb_interface
*intf2
;
2310 for (i
= 0; i
< dev
->config
->desc
.bNumInterfaces
; i
++) {
2311 intf2
= dev
->config
->interface
[i
];
2313 && intf2
->altsetting
!= NULL
2314 && intf2
->altsetting
->desc
.bInterfaceClass
==
2316 gspca_dev
->audio
= 1;
2322 gspca_dev
->sd_desc
= sd_desc
;
2323 gspca_dev
->nbufread
= 2;
2324 gspca_dev
->empty_packet
= -1; /* don't check the empty packets */
2326 /* configure the subdriver and initialize the USB device */
2327 ret
= sd_desc
->config(gspca_dev
, id
);
2330 if (gspca_dev
->cam
.ctrls
!= NULL
)
2331 ctrls_init(gspca_dev
);
2332 ret
= sd_desc
->init(gspca_dev
);
2335 gspca_set_default_mode(gspca_dev
);
2337 ret
= gspca_input_connect(gspca_dev
);
2341 mutex_init(&gspca_dev
->usb_lock
);
2342 mutex_init(&gspca_dev
->queue_lock
);
2343 init_waitqueue_head(&gspca_dev
->wq
);
2345 /* init video stuff */
2346 memcpy(&gspca_dev
->vdev
, &gspca_template
, sizeof gspca_template
);
2347 gspca_dev
->vdev
.parent
= &intf
->dev
;
2348 gspca_dev
->module
= module
;
2349 gspca_dev
->present
= 1;
2350 ret
= video_register_device(&gspca_dev
->vdev
,
2354 pr_err("video_register_device err %d\n", ret
);
2358 usb_set_intfdata(intf
, gspca_dev
);
2359 PDEBUG(D_PROBE
, "%s created", video_device_node_name(&gspca_dev
->vdev
));
2361 gspca_input_create_urb(gspca_dev
);
2365 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2366 if (gspca_dev
->input_dev
)
2367 input_unregister_device(gspca_dev
->input_dev
);
2369 kfree(gspca_dev
->usb_buf
);
2373 EXPORT_SYMBOL(gspca_dev_probe2
);
2375 /* same function as the previous one, but check the interface */
2376 int gspca_dev_probe(struct usb_interface
*intf
,
2377 const struct usb_device_id
*id
,
2378 const struct sd_desc
*sd_desc
,
2380 struct module
*module
)
2382 struct usb_device
*dev
= interface_to_usbdev(intf
);
2384 /* we don't handle multi-config cameras */
2385 if (dev
->descriptor
.bNumConfigurations
!= 1) {
2386 pr_err("%04x:%04x too many config\n",
2387 id
->idVendor
, id
->idProduct
);
2391 /* the USB video interface must be the first one */
2392 if (dev
->config
->desc
.bNumInterfaces
!= 1
2393 && intf
->cur_altsetting
->desc
.bInterfaceNumber
!= 0)
2396 return gspca_dev_probe2(intf
, id
, sd_desc
, dev_size
, module
);
2398 EXPORT_SYMBOL(gspca_dev_probe
);
2403 * This function must be called by the sub-driver
2404 * when the device disconnects, after the specific resources are freed.
2406 void gspca_disconnect(struct usb_interface
*intf
)
2408 struct gspca_dev
*gspca_dev
= usb_get_intfdata(intf
);
2409 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2410 struct input_dev
*input_dev
;
2413 PDEBUG(D_PROBE
, "%s disconnect",
2414 video_device_node_name(&gspca_dev
->vdev
));
2415 mutex_lock(&gspca_dev
->usb_lock
);
2417 gspca_dev
->present
= 0;
2418 wake_up_interruptible(&gspca_dev
->wq
);
2420 destroy_urbs(gspca_dev
);
2422 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2423 gspca_input_destroy_urb(gspca_dev
);
2424 input_dev
= gspca_dev
->input_dev
;
2426 gspca_dev
->input_dev
= NULL
;
2427 input_unregister_device(input_dev
);
2431 /* the device is freed at exit of this function */
2432 gspca_dev
->dev
= NULL
;
2433 mutex_unlock(&gspca_dev
->usb_lock
);
2435 usb_set_intfdata(intf
, NULL
);
2437 /* release the device */
2438 /* (this will call gspca_release() immediately or on last close) */
2439 video_unregister_device(&gspca_dev
->vdev
);
2441 /* PDEBUG(D_PROBE, "disconnect complete"); */
2443 EXPORT_SYMBOL(gspca_disconnect
);
2446 int gspca_suspend(struct usb_interface
*intf
, pm_message_t message
)
2448 struct gspca_dev
*gspca_dev
= usb_get_intfdata(intf
);
2450 if (!gspca_dev
->streaming
)
2452 gspca_dev
->frozen
= 1; /* avoid urb error messages */
2453 if (gspca_dev
->sd_desc
->stopN
)
2454 gspca_dev
->sd_desc
->stopN(gspca_dev
);
2455 destroy_urbs(gspca_dev
);
2456 gspca_input_destroy_urb(gspca_dev
);
2457 gspca_set_alt0(gspca_dev
);
2458 if (gspca_dev
->sd_desc
->stop0
)
2459 gspca_dev
->sd_desc
->stop0(gspca_dev
);
2462 EXPORT_SYMBOL(gspca_suspend
);
2464 int gspca_resume(struct usb_interface
*intf
)
2466 struct gspca_dev
*gspca_dev
= usb_get_intfdata(intf
);
2468 gspca_dev
->frozen
= 0;
2469 gspca_dev
->sd_desc
->init(gspca_dev
);
2470 gspca_input_create_urb(gspca_dev
);
2471 if (gspca_dev
->streaming
)
2472 return gspca_init_transfer(gspca_dev
);
2475 EXPORT_SYMBOL(gspca_resume
);
2477 /* -- cam driver utility functions -- */
2479 /* auto gain and exposure algorithm based on the knee algorithm described here:
2480 http://ytse.tricolour.net/docs/LowLightOptimization.html
2482 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2484 int gspca_auto_gain_n_exposure(struct gspca_dev
*gspca_dev
, int avg_lum
,
2485 int desired_avg_lum
, int deadzone
, int gain_knee
, int exposure_knee
)
2487 int i
, steps
, gain
, orig_gain
, exposure
, orig_exposure
, autogain
;
2488 const struct ctrl
*gain_ctrl
= NULL
;
2489 const struct ctrl
*exposure_ctrl
= NULL
;
2490 const struct ctrl
*autogain_ctrl
= NULL
;
2493 for (i
= 0; i
< gspca_dev
->sd_desc
->nctrls
; i
++) {
2494 if (gspca_dev
->ctrl_dis
& (1 << i
))
2496 if (gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.id
== V4L2_CID_GAIN
)
2497 gain_ctrl
= &gspca_dev
->sd_desc
->ctrls
[i
];
2498 if (gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.id
== V4L2_CID_EXPOSURE
)
2499 exposure_ctrl
= &gspca_dev
->sd_desc
->ctrls
[i
];
2500 if (gspca_dev
->sd_desc
->ctrls
[i
].qctrl
.id
== V4L2_CID_AUTOGAIN
)
2501 autogain_ctrl
= &gspca_dev
->sd_desc
->ctrls
[i
];
2503 if (!gain_ctrl
|| !exposure_ctrl
|| !autogain_ctrl
) {
2504 PDEBUG(D_ERR
, "Error: gspca_auto_gain_n_exposure called "
2505 "on cam without (auto)gain/exposure");
2509 if (gain_ctrl
->get(gspca_dev
, &gain
) ||
2510 exposure_ctrl
->get(gspca_dev
, &exposure
) ||
2511 autogain_ctrl
->get(gspca_dev
, &autogain
) || !autogain
)
2515 orig_exposure
= exposure
;
2517 /* If we are of a multiple of deadzone, do multiple steps to reach the
2518 desired lumination fast (with the risc of a slight overshoot) */
2519 steps
= abs(desired_avg_lum
- avg_lum
) / deadzone
;
2521 PDEBUG(D_FRAM
, "autogain: lum: %d, desired: %d, steps: %d",
2522 avg_lum
, desired_avg_lum
, steps
);
2524 for (i
= 0; i
< steps
; i
++) {
2525 if (avg_lum
> desired_avg_lum
) {
2526 if (gain
> gain_knee
)
2528 else if (exposure
> exposure_knee
)
2530 else if (gain
> gain_ctrl
->qctrl
.default_value
)
2532 else if (exposure
> exposure_ctrl
->qctrl
.minimum
)
2534 else if (gain
> gain_ctrl
->qctrl
.minimum
)
2539 if (gain
< gain_ctrl
->qctrl
.default_value
)
2541 else if (exposure
< exposure_knee
)
2543 else if (gain
< gain_knee
)
2545 else if (exposure
< exposure_ctrl
->qctrl
.maximum
)
2547 else if (gain
< gain_ctrl
->qctrl
.maximum
)
2554 if (gain
!= orig_gain
) {
2555 gain_ctrl
->set(gspca_dev
, gain
);
2558 if (exposure
!= orig_exposure
) {
2559 exposure_ctrl
->set(gspca_dev
, exposure
);
2565 EXPORT_SYMBOL(gspca_auto_gain_n_exposure
);
2567 /* -- module insert / remove -- */
2568 static int __init
gspca_init(void)
2570 pr_info("v" GSPCA_VERSION
" registered\n");
2573 static void __exit
gspca_exit(void)
2577 module_init(gspca_init
);
2578 module_exit(gspca_exit
);
2581 module_param_named(debug
, gspca_debug
, int, 0644);
2582 MODULE_PARM_DESC(debug
,
2583 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
2584 " 0x08:stream 0x10:frame 0x20:packet"