2 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
4 * Copyright (C) 2006 Nicolas VIVIEN
5 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
7 * Some parts are inspired from cafe_ccic.c
8 * Copyright 2006-2007 Jonathan Corbet
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
31 #include <linux/usb.h>
33 #include <linux/vmalloc.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-ioctl.h>
38 #include "stk-webcam.h"
42 module_param(hflip
, bool, 0444);
43 MODULE_PARM_DESC(hflip
, "Horizontal image flip (mirror). Defaults to 1");
46 module_param(vflip
, bool, 0444);
47 MODULE_PARM_DESC(vflip
, "Vertical image flip. Defaults to 1");
50 module_param(debug
, int, 0444);
51 MODULE_PARM_DESC(debug
, "Debug v4l ioctls. Defaults to 0");
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
55 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
59 /* Some cameras have audio interfaces, we aren't interested in those */
60 static struct usb_device_id stkwebcam_table
[] = {
61 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
62 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
65 MODULE_DEVICE_TABLE(usb
, stkwebcam_table
);
70 int stk_camera_write_reg(struct stk_camera
*dev
, u16 index
, u8 value
)
72 struct usb_device
*udev
= dev
->udev
;
75 ret
= usb_control_msg(udev
, usb_sndctrlpipe(udev
, 0),
77 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
89 int stk_camera_read_reg(struct stk_camera
*dev
, u16 index
, int *value
)
91 struct usb_device
*udev
= dev
->udev
;
94 ret
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
96 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
108 static int stk_start_stream(struct stk_camera
*dev
)
112 int value_116
, value_117
;
114 if (!is_present(dev
))
116 if (!is_memallocd(dev
) || !is_initialised(dev
)) {
117 STK_ERROR("FIXME: Buffers are not allocated\n");
120 ret
= usb_set_interface(dev
->udev
, 0, 5);
123 STK_ERROR("usb_set_interface failed !\n");
124 if (stk_sensor_wakeup(dev
))
125 STK_ERROR("error awaking the sensor\n");
127 stk_camera_read_reg(dev
, 0x0116, &value_116
);
128 stk_camera_read_reg(dev
, 0x0117, &value_117
);
130 stk_camera_write_reg(dev
, 0x0116, 0x0000);
131 stk_camera_write_reg(dev
, 0x0117, 0x0000);
133 stk_camera_read_reg(dev
, 0x0100, &value
);
134 stk_camera_write_reg(dev
, 0x0100, value
| 0x80);
136 stk_camera_write_reg(dev
, 0x0116, value_116
);
137 stk_camera_write_reg(dev
, 0x0117, value_117
);
138 for (i
= 0; i
< MAX_ISO_BUFS
; i
++) {
139 if (dev
->isobufs
[i
].urb
) {
140 ret
= usb_submit_urb(dev
->isobufs
[i
].urb
, GFP_KERNEL
);
141 atomic_inc(&dev
->urbs_used
);
150 static int stk_stop_stream(struct stk_camera
*dev
)
154 if (is_present(dev
)) {
155 stk_camera_read_reg(dev
, 0x0100, &value
);
156 stk_camera_write_reg(dev
, 0x0100, value
& ~0x80);
157 if (dev
->isobufs
!= NULL
) {
158 for (i
= 0; i
< MAX_ISO_BUFS
; i
++) {
159 if (dev
->isobufs
[i
].urb
)
160 usb_kill_urb(dev
->isobufs
[i
].urb
);
163 unset_streaming(dev
);
165 if (usb_set_interface(dev
->udev
, 0, 0))
166 STK_ERROR("usb_set_interface failed !\n");
167 if (stk_sensor_sleep(dev
))
168 STK_ERROR("error suspending the sensor\n");
174 * This seems to be the shortest init sequence we
175 * must do in order to find the sensor
176 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
177 * is also reset. Maybe powers down it?
178 * Rest of values don't make a difference
181 static struct regval stk1125_initvals
[] = {
182 /*TODO: What means this sequence? */
211 static int stk_initialise(struct stk_camera
*dev
)
215 if (!is_present(dev
))
217 if (is_initialised(dev
))
219 rv
= stk1125_initvals
;
220 while (rv
->reg
!= 0xffff) {
221 ret
= stk_camera_write_reg(dev
, rv
->reg
, rv
->val
);
226 if (stk_sensor_init(dev
) == 0) {
227 set_initialised(dev
);
233 #ifdef CONFIG_VIDEO_V4L1_COMPAT
235 /* sysfs functions */
236 /*FIXME cleanup this */
238 static ssize_t
show_brightness(struct device
*class,
239 struct device_attribute
*attr
, char *buf
)
241 struct video_device
*vdev
= to_video_device(class);
242 struct stk_camera
*dev
= vdev_to_camera(vdev
);
244 return sprintf(buf
, "%X\n", dev
->vsettings
.brightness
);
247 static ssize_t
store_brightness(struct device
*class,
248 struct device_attribute
*attr
, const char *buf
, size_t count
)
254 struct video_device
*vdev
= to_video_device(class);
255 struct stk_camera
*dev
= vdev_to_camera(vdev
);
257 value
= simple_strtoul(buf
, &endp
, 16);
259 dev
->vsettings
.brightness
= (int) value
;
261 ret
= stk_sensor_set_brightness(dev
, value
>> 8);
268 static ssize_t
show_hflip(struct device
*class,
269 struct device_attribute
*attr
, char *buf
)
271 struct video_device
*vdev
= to_video_device(class);
272 struct stk_camera
*dev
= vdev_to_camera(vdev
);
274 return sprintf(buf
, "%d\n", dev
->vsettings
.hflip
);
277 static ssize_t
store_hflip(struct device
*class,
278 struct device_attribute
*attr
, const char *buf
, size_t count
)
280 struct video_device
*vdev
= to_video_device(class);
281 struct stk_camera
*dev
= vdev_to_camera(vdev
);
283 if (strncmp(buf
, "1", 1) == 0)
284 dev
->vsettings
.hflip
= 1;
285 else if (strncmp(buf
, "0", 1) == 0)
286 dev
->vsettings
.hflip
= 0;
293 static ssize_t
show_vflip(struct device
*class,
294 struct device_attribute
*attr
, char *buf
)
296 struct video_device
*vdev
= to_video_device(class);
297 struct stk_camera
*dev
= vdev_to_camera(vdev
);
299 return sprintf(buf
, "%d\n", dev
->vsettings
.vflip
);
302 static ssize_t
store_vflip(struct device
*class,
303 struct device_attribute
*attr
, const char *buf
, size_t count
)
305 struct video_device
*vdev
= to_video_device(class);
306 struct stk_camera
*dev
= vdev_to_camera(vdev
);
308 if (strncmp(buf
, "1", 1) == 0)
309 dev
->vsettings
.vflip
= 1;
310 else if (strncmp(buf
, "0", 1) == 0)
311 dev
->vsettings
.vflip
= 0;
318 static DEVICE_ATTR(brightness
, S_IRUGO
| S_IWUGO
,
319 show_brightness
, store_brightness
);
320 static DEVICE_ATTR(hflip
, S_IRUGO
| S_IWUGO
, show_hflip
, store_hflip
);
321 static DEVICE_ATTR(vflip
, S_IRUGO
| S_IWUGO
, show_vflip
, store_vflip
);
323 static int stk_create_sysfs_files(struct video_device
*vdev
)
327 ret
= device_create_file(&vdev
->dev
, &dev_attr_brightness
);
328 ret
+= device_create_file(&vdev
->dev
, &dev_attr_hflip
);
329 ret
+= device_create_file(&vdev
->dev
, &dev_attr_vflip
);
331 STK_WARNING("Could not create sysfs files\n");
335 static void stk_remove_sysfs_files(struct video_device
*vdev
)
337 device_remove_file(&vdev
->dev
, &dev_attr_brightness
);
338 device_remove_file(&vdev
->dev
, &dev_attr_hflip
);
339 device_remove_file(&vdev
->dev
, &dev_attr_vflip
);
343 #define stk_create_sysfs_files(a)
344 #define stk_remove_sysfs_files(a)
347 /* *********************************************** */
349 * This function is called as an URB transfert is complete (Isochronous pipe).
350 * So, the traitement is done in interrupt time, so it has be fast, not crash,
351 * and not stall. Neat.
353 static void stk_isoc_handler(struct urb
*urb
)
360 unsigned char *fill
= NULL
;
361 unsigned char *iso_buf
= NULL
;
363 struct stk_camera
*dev
;
364 struct stk_sio_buffer
*fb
;
366 dev
= (struct stk_camera
*) urb
->context
;
369 STK_ERROR("isoc_handler called with NULL device !\n");
373 if (urb
->status
== -ENOENT
|| urb
->status
== -ECONNRESET
374 || urb
->status
== -ESHUTDOWN
) {
375 atomic_dec(&dev
->urbs_used
);
379 spin_lock_irqsave(&dev
->spinlock
, flags
);
381 if (urb
->status
!= -EINPROGRESS
&& urb
->status
!= 0) {
382 STK_ERROR("isoc_handler: urb->status == %d\n", urb
->status
);
386 if (list_empty(&dev
->sio_avail
)) {
387 /*FIXME Stop streaming after a while */
388 (void) (printk_ratelimit() &&
389 STK_ERROR("isoc_handler without available buffer!\n"));
392 fb
= list_first_entry(&dev
->sio_avail
,
393 struct stk_sio_buffer
, list
);
394 fill
= fb
->buffer
+ fb
->v4lbuf
.bytesused
;
396 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
397 if (urb
->iso_frame_desc
[i
].status
!= 0) {
398 if (urb
->iso_frame_desc
[i
].status
!= -EXDEV
)
399 STK_ERROR("Frame %d has error %d\n", i
,
400 urb
->iso_frame_desc
[i
].status
);
403 framelen
= urb
->iso_frame_desc
[i
].actual_length
;
404 iso_buf
= urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
407 continue; /* no data */
410 * we found something informational from there
411 * the isoc frames have to type of headers
412 * type1: 00 xx 00 00 or 20 xx 00 00
413 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
414 * xx is a sequencer which has never been seen over 0x3f
415 * imho data written down looks like bayer, i see similarities
416 * after every 640 bytes
418 if (*iso_buf
& 0x80) {
421 /* This marks a new frame */
422 if (fb
->v4lbuf
.bytesused
!= 0
423 && fb
->v4lbuf
.bytesused
!= dev
->frame_size
) {
424 (void) (printk_ratelimit() &&
425 STK_ERROR("frame %d, "
426 "bytesused=%d, skipping\n",
427 i
, fb
->v4lbuf
.bytesused
));
428 fb
->v4lbuf
.bytesused
= 0;
430 } else if (fb
->v4lbuf
.bytesused
== dev
->frame_size
) {
431 if (list_is_singular(&dev
->sio_avail
)) {
432 /* Always reuse the last buffer */
433 fb
->v4lbuf
.bytesused
= 0;
436 list_move_tail(dev
->sio_avail
.next
,
438 wake_up(&dev
->wait_frame
);
439 fb
= list_first_entry(&dev
->sio_avail
,
440 struct stk_sio_buffer
, list
);
441 fb
->v4lbuf
.bytesused
= 0;
450 /* Our buffer is full !!! */
451 if (framelen
+ fb
->v4lbuf
.bytesused
> dev
->frame_size
) {
452 (void) (printk_ratelimit() &&
453 STK_ERROR("Frame buffer overflow, lost sync\n"));
454 /*FIXME Do something here? */
457 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
458 memcpy(fill
, iso_buf
, framelen
);
459 spin_lock_irqsave(&dev
->spinlock
, flags
);
462 /* New size of our buffer */
463 fb
->v4lbuf
.bytesused
+= framelen
;
467 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
468 urb
->dev
= dev
->udev
;
469 ret
= usb_submit_urb(urb
, GFP_ATOMIC
);
471 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
476 /* -------------------------------------------- */
478 static int stk_prepare_iso(struct stk_camera
*dev
)
483 struct usb_device
*udev
;
490 STK_ERROR("isobufs already allocated. Bad\n");
492 dev
->isobufs
= kzalloc(MAX_ISO_BUFS
* sizeof(*dev
->isobufs
),
494 if (dev
->isobufs
== NULL
) {
495 STK_ERROR("Unable to allocate iso buffers\n");
498 for (i
= 0; i
< MAX_ISO_BUFS
; i
++) {
499 if (dev
->isobufs
[i
].data
== NULL
) {
500 kbuf
= kzalloc(ISO_BUFFER_SIZE
, GFP_KERNEL
);
502 STK_ERROR("Failed to allocate iso buffer %d\n",
506 dev
->isobufs
[i
].data
= kbuf
;
508 STK_ERROR("isobuf data already allocated\n");
509 if (dev
->isobufs
[i
].urb
== NULL
) {
510 urb
= usb_alloc_urb(ISO_FRAMES_PER_DESC
, GFP_KERNEL
);
512 STK_ERROR("Failed to allocate URB %d\n", i
);
515 dev
->isobufs
[i
].urb
= urb
;
517 STK_ERROR("Killing URB\n");
518 usb_kill_urb(dev
->isobufs
[i
].urb
);
519 urb
= dev
->isobufs
[i
].urb
;
523 urb
->pipe
= usb_rcvisocpipe(udev
, dev
->isoc_ep
);
524 urb
->transfer_flags
= URB_ISO_ASAP
;
525 urb
->transfer_buffer
= dev
->isobufs
[i
].data
;
526 urb
->transfer_buffer_length
= ISO_BUFFER_SIZE
;
527 urb
->complete
= stk_isoc_handler
;
529 urb
->start_frame
= 0;
530 urb
->number_of_packets
= ISO_FRAMES_PER_DESC
;
532 for (j
= 0; j
< ISO_FRAMES_PER_DESC
; j
++) {
533 urb
->iso_frame_desc
[j
].offset
= j
* ISO_MAX_FRAME_SIZE
;
534 urb
->iso_frame_desc
[j
].length
= ISO_MAX_FRAME_SIZE
;
541 for (i
= 0; i
< MAX_ISO_BUFS
&& dev
->isobufs
[i
].data
; i
++)
542 kfree(dev
->isobufs
[i
].data
);
543 for (i
= 0; i
< MAX_ISO_BUFS
&& dev
->isobufs
[i
].urb
; i
++)
544 usb_free_urb(dev
->isobufs
[i
].urb
);
550 static void stk_clean_iso(struct stk_camera
*dev
)
554 if (dev
== NULL
|| dev
->isobufs
== NULL
)
557 for (i
= 0; i
< MAX_ISO_BUFS
; i
++) {
560 urb
= dev
->isobufs
[i
].urb
;
562 if (atomic_read(&dev
->urbs_used
) && is_present(dev
))
566 kfree(dev
->isobufs
[i
].data
);
570 unset_memallocd(dev
);
573 static int stk_setup_siobuf(struct stk_camera
*dev
, int index
)
575 struct stk_sio_buffer
*buf
= dev
->sio_bufs
+ index
;
576 INIT_LIST_HEAD(&buf
->list
);
577 buf
->v4lbuf
.length
= PAGE_ALIGN(dev
->frame_size
);
578 buf
->buffer
= vmalloc_user(buf
->v4lbuf
.length
);
579 if (buf
->buffer
== NULL
)
583 buf
->v4lbuf
.index
= index
;
584 buf
->v4lbuf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
585 buf
->v4lbuf
.field
= V4L2_FIELD_NONE
;
586 buf
->v4lbuf
.memory
= V4L2_MEMORY_MMAP
;
587 buf
->v4lbuf
.m
.offset
= 2*index
*buf
->v4lbuf
.length
;
591 static int stk_free_sio_buffers(struct stk_camera
*dev
)
596 if (dev
->n_sbufs
== 0 || dev
->sio_bufs
== NULL
)
599 * If any buffers are mapped, we cannot free them at all.
601 for (i
= 0; i
< dev
->n_sbufs
; i
++) {
602 if (dev
->sio_bufs
[i
].mapcount
> 0)
608 spin_lock_irqsave(&dev
->spinlock
, flags
);
609 INIT_LIST_HEAD(&dev
->sio_avail
);
610 INIT_LIST_HEAD(&dev
->sio_full
);
611 nbufs
= dev
->n_sbufs
;
613 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
614 for (i
= 0; i
< nbufs
; i
++) {
615 if (dev
->sio_bufs
[i
].buffer
!= NULL
)
616 vfree(dev
->sio_bufs
[i
].buffer
);
618 kfree(dev
->sio_bufs
);
619 dev
->sio_bufs
= NULL
;
623 static int stk_prepare_sio_buffers(struct stk_camera
*dev
, unsigned n_sbufs
)
626 if (dev
->sio_bufs
!= NULL
)
627 STK_ERROR("sio_bufs already allocated\n");
629 dev
->sio_bufs
= kzalloc(n_sbufs
* sizeof(struct stk_sio_buffer
),
631 if (dev
->sio_bufs
== NULL
)
633 for (i
= 0; i
< n_sbufs
; i
++) {
634 if (stk_setup_siobuf(dev
, i
))
635 return (dev
->n_sbufs
> 1)? 0 : -ENOMEM
;
642 static int stk_allocate_buffers(struct stk_camera
*dev
, unsigned n_sbufs
)
645 err
= stk_prepare_iso(dev
);
650 err
= stk_prepare_sio_buffers(dev
, n_sbufs
);
652 stk_free_sio_buffers(dev
);
658 static void stk_free_buffers(struct stk_camera
*dev
)
661 stk_free_sio_buffers(dev
);
663 /* -------------------------------------------- */
665 /* v4l file operations */
667 static int v4l_stk_open(struct file
*fp
)
669 struct stk_camera
*dev
;
670 struct video_device
*vdev
;
672 vdev
= video_devdata(fp
);
673 dev
= vdev_to_camera(vdev
);
675 if (dev
== NULL
|| !is_present(dev
)) {
678 fp
->private_data
= dev
;
679 usb_autopm_get_interface(dev
->interface
);
684 static int v4l_stk_release(struct file
*fp
)
686 struct stk_camera
*dev
= fp
->private_data
;
688 if (dev
->owner
== fp
) {
689 stk_stop_stream(dev
);
690 stk_free_buffers(dev
);
695 usb_autopm_put_interface(dev
->interface
);
700 static ssize_t
v4l_stk_read(struct file
*fp
, char __user
*buf
,
701 size_t count
, loff_t
*f_pos
)
706 struct stk_sio_buffer
*sbuf
;
707 struct stk_camera
*dev
= fp
->private_data
;
709 if (!is_present(dev
))
711 if (dev
->owner
&& dev
->owner
!= fp
)
714 if (!is_streaming(dev
)) {
715 if (stk_initialise(dev
)
716 || stk_allocate_buffers(dev
, 3)
717 || stk_start_stream(dev
))
719 spin_lock_irqsave(&dev
->spinlock
, flags
);
720 for (i
= 0; i
< dev
->n_sbufs
; i
++) {
721 list_add_tail(&dev
->sio_bufs
[i
].list
, &dev
->sio_avail
);
722 dev
->sio_bufs
[i
].v4lbuf
.flags
= V4L2_BUF_FLAG_QUEUED
;
724 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
727 if (fp
->f_flags
& O_NONBLOCK
&& list_empty(&dev
->sio_full
))
729 ret
= wait_event_interruptible(dev
->wait_frame
,
730 !list_empty(&dev
->sio_full
) || !is_present(dev
));
733 if (!is_present(dev
))
736 if (count
+ *f_pos
> dev
->frame_size
)
737 count
= dev
->frame_size
- *f_pos
;
738 spin_lock_irqsave(&dev
->spinlock
, flags
);
739 if (list_empty(&dev
->sio_full
)) {
740 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
741 STK_ERROR("BUG: No siobufs ready\n");
744 sbuf
= list_first_entry(&dev
->sio_full
, struct stk_sio_buffer
, list
);
745 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
747 if (copy_to_user(buf
, sbuf
->buffer
+ *f_pos
, count
))
752 if (*f_pos
>= dev
->frame_size
) {
754 spin_lock_irqsave(&dev
->spinlock
, flags
);
755 list_move_tail(&sbuf
->list
, &dev
->sio_avail
);
756 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
761 static unsigned int v4l_stk_poll(struct file
*fp
, poll_table
*wait
)
763 struct stk_camera
*dev
= fp
->private_data
;
765 poll_wait(fp
, &dev
->wait_frame
, wait
);
767 if (!is_present(dev
))
770 if (!list_empty(&dev
->sio_full
))
771 return (POLLIN
| POLLRDNORM
);
777 static void stk_v4l_vm_open(struct vm_area_struct
*vma
)
779 struct stk_sio_buffer
*sbuf
= vma
->vm_private_data
;
782 static void stk_v4l_vm_close(struct vm_area_struct
*vma
)
784 struct stk_sio_buffer
*sbuf
= vma
->vm_private_data
;
786 if (sbuf
->mapcount
== 0)
787 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_MAPPED
;
789 static const struct vm_operations_struct stk_v4l_vm_ops
= {
790 .open
= stk_v4l_vm_open
,
791 .close
= stk_v4l_vm_close
794 static int v4l_stk_mmap(struct file
*fp
, struct vm_area_struct
*vma
)
798 unsigned long offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
799 struct stk_camera
*dev
= fp
->private_data
;
800 struct stk_sio_buffer
*sbuf
= NULL
;
802 if (!(vma
->vm_flags
& VM_WRITE
) || !(vma
->vm_flags
& VM_SHARED
))
805 for (i
= 0; i
< dev
->n_sbufs
; i
++) {
806 if (dev
->sio_bufs
[i
].v4lbuf
.m
.offset
== offset
) {
807 sbuf
= dev
->sio_bufs
+ i
;
813 ret
= remap_vmalloc_range(vma
, sbuf
->buffer
, 0);
816 vma
->vm_flags
|= VM_DONTEXPAND
;
817 vma
->vm_private_data
= sbuf
;
818 vma
->vm_ops
= &stk_v4l_vm_ops
;
819 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_MAPPED
;
820 stk_v4l_vm_open(vma
);
824 /* v4l ioctl handlers */
826 static int stk_vidioc_querycap(struct file
*filp
,
827 void *priv
, struct v4l2_capability
*cap
)
829 strcpy(cap
->driver
, "stk");
830 strcpy(cap
->card
, "stk");
831 cap
->version
= DRIVER_VERSION_NUM
;
833 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
834 | V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
838 static int stk_vidioc_enum_input(struct file
*filp
,
839 void *priv
, struct v4l2_input
*input
)
841 if (input
->index
!= 0)
844 strcpy(input
->name
, "Syntek USB Camera");
845 input
->type
= V4L2_INPUT_TYPE_CAMERA
;
850 static int stk_vidioc_g_input(struct file
*filp
, void *priv
, unsigned int *i
)
856 static int stk_vidioc_s_input(struct file
*filp
, void *priv
, unsigned int i
)
865 static int stk_vidioc_s_std(struct file
*filp
, void *priv
, v4l2_std_id
*a
)
870 /* List of all V4Lv2 controls supported by the driver */
871 static struct v4l2_queryctrl stk_controls
[] = {
873 .id
= V4L2_CID_BRIGHTNESS
,
874 .type
= V4L2_CTRL_TYPE_INTEGER
,
875 .name
= "Brightness",
879 .default_value
= 0x6000,
881 /*TODO: get more controls to work */
884 static int stk_vidioc_queryctrl(struct file
*filp
,
885 void *priv
, struct v4l2_queryctrl
*c
)
889 nbr
= ARRAY_SIZE(stk_controls
);
891 for (i
= 0; i
< nbr
; i
++) {
892 if (stk_controls
[i
].id
== c
->id
) {
893 memcpy(c
, &stk_controls
[i
],
894 sizeof(struct v4l2_queryctrl
));
901 static int stk_vidioc_g_ctrl(struct file
*filp
,
902 void *priv
, struct v4l2_control
*c
)
904 struct stk_camera
*dev
= priv
;
906 case V4L2_CID_BRIGHTNESS
:
907 c
->value
= dev
->vsettings
.brightness
;
915 static int stk_vidioc_s_ctrl(struct file
*filp
,
916 void *priv
, struct v4l2_control
*c
)
918 struct stk_camera
*dev
= priv
;
920 case V4L2_CID_BRIGHTNESS
:
921 dev
->vsettings
.brightness
= c
->value
;
922 return stk_sensor_set_brightness(dev
, c
->value
>> 8);
930 static int stk_vidioc_enum_fmt_vid_cap(struct file
*filp
,
931 void *priv
, struct v4l2_fmtdesc
*fmtd
)
933 switch (fmtd
->index
) {
935 fmtd
->pixelformat
= V4L2_PIX_FMT_RGB565
;
936 strcpy(fmtd
->description
, "r5g6b5");
939 fmtd
->pixelformat
= V4L2_PIX_FMT_RGB565X
;
940 strcpy(fmtd
->description
, "r5g6b5BE");
943 fmtd
->pixelformat
= V4L2_PIX_FMT_UYVY
;
944 strcpy(fmtd
->description
, "yuv4:2:2");
947 fmtd
->pixelformat
= V4L2_PIX_FMT_SBGGR8
;
948 strcpy(fmtd
->description
, "Raw bayer");
951 fmtd
->pixelformat
= V4L2_PIX_FMT_YUYV
;
952 strcpy(fmtd
->description
, "yuv4:2:2");
960 static struct stk_size
{
965 { .w
= 1280, .h
= 1024, .m
= MODE_SXGA
, },
966 { .w
= 640, .h
= 480, .m
= MODE_VGA
, },
967 { .w
= 352, .h
= 288, .m
= MODE_CIF
, },
968 { .w
= 320, .h
= 240, .m
= MODE_QVGA
, },
969 { .w
= 176, .h
= 144, .m
= MODE_QCIF
, },
972 static int stk_vidioc_g_fmt_vid_cap(struct file
*filp
,
973 void *priv
, struct v4l2_format
*f
)
975 struct v4l2_pix_format
*pix_format
= &f
->fmt
.pix
;
976 struct stk_camera
*dev
= priv
;
979 for (i
= 0; i
< ARRAY_SIZE(stk_sizes
)
980 && stk_sizes
[i
].m
!= dev
->vsettings
.mode
;
982 if (i
== ARRAY_SIZE(stk_sizes
)) {
983 STK_ERROR("ERROR: mode invalid\n");
986 pix_format
->width
= stk_sizes
[i
].w
;
987 pix_format
->height
= stk_sizes
[i
].h
;
988 pix_format
->field
= V4L2_FIELD_NONE
;
989 pix_format
->colorspace
= V4L2_COLORSPACE_SRGB
;
990 pix_format
->pixelformat
= dev
->vsettings
.palette
;
991 if (dev
->vsettings
.palette
== V4L2_PIX_FMT_SBGGR8
)
992 pix_format
->bytesperline
= pix_format
->width
;
994 pix_format
->bytesperline
= 2 * pix_format
->width
;
995 pix_format
->sizeimage
= pix_format
->bytesperline
996 * pix_format
->height
;
1000 static int stk_vidioc_try_fmt_vid_cap(struct file
*filp
,
1001 void *priv
, struct v4l2_format
*fmtd
)
1004 switch (fmtd
->fmt
.pix
.pixelformat
) {
1005 case V4L2_PIX_FMT_RGB565
:
1006 case V4L2_PIX_FMT_RGB565X
:
1007 case V4L2_PIX_FMT_UYVY
:
1008 case V4L2_PIX_FMT_YUYV
:
1009 case V4L2_PIX_FMT_SBGGR8
:
1014 for (i
= 1; i
< ARRAY_SIZE(stk_sizes
); i
++) {
1015 if (fmtd
->fmt
.pix
.width
> stk_sizes
[i
].w
)
1018 if (i
== ARRAY_SIZE(stk_sizes
)
1019 || (abs(fmtd
->fmt
.pix
.width
- stk_sizes
[i
-1].w
)
1020 < abs(fmtd
->fmt
.pix
.width
- stk_sizes
[i
].w
))) {
1021 fmtd
->fmt
.pix
.height
= stk_sizes
[i
-1].h
;
1022 fmtd
->fmt
.pix
.width
= stk_sizes
[i
-1].w
;
1023 fmtd
->fmt
.pix
.priv
= i
- 1;
1025 fmtd
->fmt
.pix
.height
= stk_sizes
[i
].h
;
1026 fmtd
->fmt
.pix
.width
= stk_sizes
[i
].w
;
1027 fmtd
->fmt
.pix
.priv
= i
;
1030 fmtd
->fmt
.pix
.field
= V4L2_FIELD_NONE
;
1031 fmtd
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SRGB
;
1032 if (fmtd
->fmt
.pix
.pixelformat
== V4L2_PIX_FMT_SBGGR8
)
1033 fmtd
->fmt
.pix
.bytesperline
= fmtd
->fmt
.pix
.width
;
1035 fmtd
->fmt
.pix
.bytesperline
= 2 * fmtd
->fmt
.pix
.width
;
1036 fmtd
->fmt
.pix
.sizeimage
= fmtd
->fmt
.pix
.bytesperline
1037 * fmtd
->fmt
.pix
.height
;
1041 static int stk_setup_format(struct stk_camera
*dev
)
1045 if (dev
->vsettings
.palette
== V4L2_PIX_FMT_SBGGR8
)
1049 while (i
< ARRAY_SIZE(stk_sizes
) &&
1050 stk_sizes
[i
].m
!= dev
->vsettings
.mode
)
1052 if (i
== ARRAY_SIZE(stk_sizes
)) {
1053 STK_ERROR("Something is broken in %s\n", __func__
);
1056 /* This registers controls some timings, not sure of what. */
1057 stk_camera_write_reg(dev
, 0x001b, 0x0e);
1058 if (dev
->vsettings
.mode
== MODE_SXGA
)
1059 stk_camera_write_reg(dev
, 0x001c, 0x0e);
1061 stk_camera_write_reg(dev
, 0x001c, 0x46);
1063 * Registers 0x0115 0x0114 are the size of each line (bytes),
1064 * regs 0x0117 0x0116 are the heigth of the image.
1066 stk_camera_write_reg(dev
, 0x0115,
1067 ((stk_sizes
[i
].w
* depth
) >> 8) & 0xff);
1068 stk_camera_write_reg(dev
, 0x0114,
1069 (stk_sizes
[i
].w
* depth
) & 0xff);
1070 stk_camera_write_reg(dev
, 0x0117,
1071 (stk_sizes
[i
].h
>> 8) & 0xff);
1072 stk_camera_write_reg(dev
, 0x0116,
1073 stk_sizes
[i
].h
& 0xff);
1074 return stk_sensor_configure(dev
);
1077 static int stk_vidioc_s_fmt_vid_cap(struct file
*filp
,
1078 void *priv
, struct v4l2_format
*fmtd
)
1081 struct stk_camera
*dev
= priv
;
1085 if (!is_present(dev
))
1087 if (is_streaming(dev
))
1089 if (dev
->owner
&& dev
->owner
!= filp
)
1091 ret
= stk_vidioc_try_fmt_vid_cap(filp
, priv
, fmtd
);
1096 dev
->vsettings
.palette
= fmtd
->fmt
.pix
.pixelformat
;
1097 stk_free_buffers(dev
);
1098 dev
->frame_size
= fmtd
->fmt
.pix
.sizeimage
;
1099 dev
->vsettings
.mode
= stk_sizes
[fmtd
->fmt
.pix
.priv
].m
;
1101 stk_initialise(dev
);
1102 return stk_setup_format(dev
);
1105 static int stk_vidioc_reqbufs(struct file
*filp
,
1106 void *priv
, struct v4l2_requestbuffers
*rb
)
1108 struct stk_camera
*dev
= priv
;
1112 if (rb
->memory
!= V4L2_MEMORY_MMAP
)
1114 if (is_streaming(dev
)
1115 || (dev
->owner
&& dev
->owner
!= filp
))
1119 /*FIXME If they ask for zero, we must stop streaming and free */
1122 /* Arbitrary limit */
1123 else if (rb
->count
> 5)
1126 stk_allocate_buffers(dev
, rb
->count
);
1127 rb
->count
= dev
->n_sbufs
;
1131 static int stk_vidioc_querybuf(struct file
*filp
,
1132 void *priv
, struct v4l2_buffer
*buf
)
1134 struct stk_camera
*dev
= priv
;
1135 struct stk_sio_buffer
*sbuf
;
1137 if (buf
->index
>= dev
->n_sbufs
)
1139 sbuf
= dev
->sio_bufs
+ buf
->index
;
1140 *buf
= sbuf
->v4lbuf
;
1144 static int stk_vidioc_qbuf(struct file
*filp
,
1145 void *priv
, struct v4l2_buffer
*buf
)
1147 struct stk_camera
*dev
= priv
;
1148 struct stk_sio_buffer
*sbuf
;
1149 unsigned long flags
;
1151 if (buf
->memory
!= V4L2_MEMORY_MMAP
)
1154 if (buf
->index
>= dev
->n_sbufs
)
1156 sbuf
= dev
->sio_bufs
+ buf
->index
;
1157 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_QUEUED
)
1159 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_QUEUED
;
1160 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_DONE
;
1161 spin_lock_irqsave(&dev
->spinlock
, flags
);
1162 list_add_tail(&sbuf
->list
, &dev
->sio_avail
);
1163 *buf
= sbuf
->v4lbuf
;
1164 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
1168 static int stk_vidioc_dqbuf(struct file
*filp
,
1169 void *priv
, struct v4l2_buffer
*buf
)
1171 struct stk_camera
*dev
= priv
;
1172 struct stk_sio_buffer
*sbuf
;
1173 unsigned long flags
;
1176 if (!is_streaming(dev
))
1179 if (filp
->f_flags
& O_NONBLOCK
&& list_empty(&dev
->sio_full
))
1180 return -EWOULDBLOCK
;
1181 ret
= wait_event_interruptible(dev
->wait_frame
,
1182 !list_empty(&dev
->sio_full
) || !is_present(dev
));
1185 if (!is_present(dev
))
1188 spin_lock_irqsave(&dev
->spinlock
, flags
);
1189 sbuf
= list_first_entry(&dev
->sio_full
, struct stk_sio_buffer
, list
);
1190 list_del_init(&sbuf
->list
);
1191 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
1192 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_QUEUED
;
1193 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_DONE
;
1194 sbuf
->v4lbuf
.sequence
= ++dev
->sequence
;
1195 do_gettimeofday(&sbuf
->v4lbuf
.timestamp
);
1197 *buf
= sbuf
->v4lbuf
;
1201 static int stk_vidioc_streamon(struct file
*filp
,
1202 void *priv
, enum v4l2_buf_type type
)
1204 struct stk_camera
*dev
= priv
;
1205 if (is_streaming(dev
))
1207 if (dev
->sio_bufs
== NULL
)
1210 return stk_start_stream(dev
);
1213 static int stk_vidioc_streamoff(struct file
*filp
,
1214 void *priv
, enum v4l2_buf_type type
)
1216 struct stk_camera
*dev
= priv
;
1217 unsigned long flags
;
1219 stk_stop_stream(dev
);
1220 spin_lock_irqsave(&dev
->spinlock
, flags
);
1221 INIT_LIST_HEAD(&dev
->sio_avail
);
1222 INIT_LIST_HEAD(&dev
->sio_full
);
1223 for (i
= 0; i
< dev
->n_sbufs
; i
++) {
1224 INIT_LIST_HEAD(&dev
->sio_bufs
[i
].list
);
1225 dev
->sio_bufs
[i
].v4lbuf
.flags
= 0;
1227 spin_unlock_irqrestore(&dev
->spinlock
, flags
);
1232 static int stk_vidioc_g_parm(struct file
*filp
,
1233 void *priv
, struct v4l2_streamparm
*sp
)
1235 /*FIXME This is not correct */
1236 sp
->parm
.capture
.timeperframe
.numerator
= 1;
1237 sp
->parm
.capture
.timeperframe
.denominator
= 30;
1238 sp
->parm
.capture
.readbuffers
= 2;
1242 static int stk_vidioc_enum_framesizes(struct file
*filp
,
1243 void *priv
, struct v4l2_frmsizeenum
*frms
)
1245 if (frms
->index
>= ARRAY_SIZE(stk_sizes
))
1247 switch (frms
->pixel_format
) {
1248 case V4L2_PIX_FMT_RGB565
:
1249 case V4L2_PIX_FMT_RGB565X
:
1250 case V4L2_PIX_FMT_UYVY
:
1251 case V4L2_PIX_FMT_YUYV
:
1252 case V4L2_PIX_FMT_SBGGR8
:
1253 frms
->type
= V4L2_FRMSIZE_TYPE_DISCRETE
;
1254 frms
->discrete
.width
= stk_sizes
[frms
->index
].w
;
1255 frms
->discrete
.height
= stk_sizes
[frms
->index
].h
;
1257 default: return -EINVAL
;
1261 static struct v4l2_file_operations v4l_stk_fops
= {
1262 .owner
= THIS_MODULE
,
1263 .open
= v4l_stk_open
,
1264 .release
= v4l_stk_release
,
1265 .read
= v4l_stk_read
,
1266 .poll
= v4l_stk_poll
,
1267 .mmap
= v4l_stk_mmap
,
1268 .ioctl
= video_ioctl2
,
1271 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops
= {
1272 .vidioc_querycap
= stk_vidioc_querycap
,
1273 .vidioc_enum_fmt_vid_cap
= stk_vidioc_enum_fmt_vid_cap
,
1274 .vidioc_try_fmt_vid_cap
= stk_vidioc_try_fmt_vid_cap
,
1275 .vidioc_s_fmt_vid_cap
= stk_vidioc_s_fmt_vid_cap
,
1276 .vidioc_g_fmt_vid_cap
= stk_vidioc_g_fmt_vid_cap
,
1277 .vidioc_enum_input
= stk_vidioc_enum_input
,
1278 .vidioc_s_input
= stk_vidioc_s_input
,
1279 .vidioc_g_input
= stk_vidioc_g_input
,
1280 .vidioc_s_std
= stk_vidioc_s_std
,
1281 .vidioc_reqbufs
= stk_vidioc_reqbufs
,
1282 .vidioc_querybuf
= stk_vidioc_querybuf
,
1283 .vidioc_qbuf
= stk_vidioc_qbuf
,
1284 .vidioc_dqbuf
= stk_vidioc_dqbuf
,
1285 .vidioc_streamon
= stk_vidioc_streamon
,
1286 .vidioc_streamoff
= stk_vidioc_streamoff
,
1287 .vidioc_queryctrl
= stk_vidioc_queryctrl
,
1288 .vidioc_g_ctrl
= stk_vidioc_g_ctrl
,
1289 .vidioc_s_ctrl
= stk_vidioc_s_ctrl
,
1290 .vidioc_g_parm
= stk_vidioc_g_parm
,
1291 .vidioc_enum_framesizes
= stk_vidioc_enum_framesizes
,
1294 static void stk_v4l_dev_release(struct video_device
*vd
)
1296 struct stk_camera
*dev
= vdev_to_camera(vd
);
1298 if (dev
->sio_bufs
!= NULL
|| dev
->isobufs
!= NULL
)
1299 STK_ERROR("We are leaking memory\n");
1300 usb_put_intf(dev
->interface
);
1304 static struct video_device stk_v4l_data
= {
1305 .name
= "stkwebcam",
1306 .tvnorms
= V4L2_STD_UNKNOWN
,
1307 .current_norm
= V4L2_STD_UNKNOWN
,
1308 .fops
= &v4l_stk_fops
,
1309 .ioctl_ops
= &v4l_stk_ioctl_ops
,
1310 .release
= stk_v4l_dev_release
,
1314 static int stk_register_video_device(struct stk_camera
*dev
)
1318 dev
->vdev
= stk_v4l_data
;
1319 dev
->vdev
.debug
= debug
;
1320 dev
->vdev
.parent
= &dev
->interface
->dev
;
1321 err
= video_register_device(&dev
->vdev
, VFL_TYPE_GRABBER
, -1);
1323 STK_ERROR("v4l registration failed\n");
1325 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1326 video_device_node_name(&dev
->vdev
));
1333 static int stk_camera_probe(struct usb_interface
*interface
,
1334 const struct usb_device_id
*id
)
1339 struct stk_camera
*dev
= NULL
;
1340 struct usb_device
*udev
= interface_to_usbdev(interface
);
1341 struct usb_host_interface
*iface_desc
;
1342 struct usb_endpoint_descriptor
*endpoint
;
1344 dev
= kzalloc(sizeof(struct stk_camera
), GFP_KERNEL
);
1346 STK_ERROR("Out of memory !\n");
1350 spin_lock_init(&dev
->spinlock
);
1351 init_waitqueue_head(&dev
->wait_frame
);
1354 dev
->interface
= interface
;
1355 usb_get_intf(interface
);
1357 dev
->vsettings
.vflip
= vflip
;
1358 dev
->vsettings
.hflip
= hflip
;
1362 /* Set up the endpoint information
1363 * use only the first isoc-in endpoint
1364 * for the current alternate setting */
1365 iface_desc
= interface
->cur_altsetting
;
1367 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
) {
1368 endpoint
= &iface_desc
->endpoint
[i
].desc
;
1371 && usb_endpoint_is_isoc_in(endpoint
)) {
1372 /* we found an isoc in endpoint */
1373 dev
->isoc_ep
= usb_endpoint_num(endpoint
);
1377 if (!dev
->isoc_ep
) {
1378 STK_ERROR("Could not find isoc-in endpoint");
1382 dev
->vsettings
.brightness
= 0x7fff;
1383 dev
->vsettings
.palette
= V4L2_PIX_FMT_RGB565
;
1384 dev
->vsettings
.mode
= MODE_VGA
;
1385 dev
->frame_size
= 640 * 480 * 2;
1387 INIT_LIST_HEAD(&dev
->sio_avail
);
1388 INIT_LIST_HEAD(&dev
->sio_full
);
1390 usb_set_intfdata(interface
, dev
);
1392 err
= stk_register_video_device(dev
);
1397 stk_create_sysfs_files(&dev
->vdev
);
1406 static void stk_camera_disconnect(struct usb_interface
*interface
)
1408 struct stk_camera
*dev
= usb_get_intfdata(interface
);
1410 usb_set_intfdata(interface
, NULL
);
1413 wake_up_interruptible(&dev
->wait_frame
);
1414 stk_remove_sysfs_files(&dev
->vdev
);
1416 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1417 video_device_node_name(&dev
->vdev
));
1419 video_unregister_device(&dev
->vdev
);
1423 static int stk_camera_suspend(struct usb_interface
*intf
, pm_message_t message
)
1425 struct stk_camera
*dev
= usb_get_intfdata(intf
);
1426 if (is_streaming(dev
)) {
1427 stk_stop_stream(dev
);
1428 /* yes, this is ugly */
1434 static int stk_camera_resume(struct usb_interface
*intf
)
1436 struct stk_camera
*dev
= usb_get_intfdata(intf
);
1437 if (!is_initialised(dev
))
1439 unset_initialised(dev
);
1440 stk_initialise(dev
);
1441 stk_setup_format(dev
);
1442 if (is_streaming(dev
))
1443 stk_start_stream(dev
);
1448 static struct usb_driver stk_camera_driver
= {
1449 .name
= "stkwebcam",
1450 .probe
= stk_camera_probe
,
1451 .disconnect
= stk_camera_disconnect
,
1452 .id_table
= stkwebcam_table
,
1454 .suspend
= stk_camera_suspend
,
1455 .resume
= stk_camera_resume
,
1460 static int __init
stk_camera_init(void)
1464 result
= usb_register(&stk_camera_driver
);
1466 STK_ERROR("usb_register failed ! Error number %d\n", result
);
1472 static void __exit
stk_camera_exit(void)
1474 usb_deregister(&stk_camera_driver
);
1477 module_init(stk_camera_init
);
1478 module_exit(stk_camera_exit
);