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stk-webcam.c
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1 /*
2  * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
3  *
4  * Copyright (C) 2006 Nicolas VIVIEN
5  * Copyright 2007-2008 Jaime Velasco Juan <[email protected]>
6  *
7  * Some parts are inspired from cafe_ccic.c
8  * Copyright 2006-2007 Jonathan Corbet
9  *
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
13  * any later version.
14  *
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.
19  *
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
23  */
24 
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>
30 
31 #include <linux/usb.h>
32 #include <linux/mm.h>
33 #include <linux/vmalloc.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-ioctl.h>
37 
38 #include "stk-webcam.h"
39 
40 
41 static bool hflip;
42 module_param(hflip, bool, 0444);
43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
44 
45 static bool vflip;
46 module_param(vflip, bool, 0444);
47 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
48 
49 static int debug;
50 module_param(debug, int, 0444);
51 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
52 
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Jaime Velasco Juan <[email protected]> and Nicolas VIVIEN");
55 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
56 
57 
58 /* bool for webcam LED management */
59 int first_init = 1;
60 
61 /* Some cameras have audio interfaces, we aren't interested in those */
62 static struct usb_device_id stkwebcam_table[] = {
63  { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
64  { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
65  { }
66 };
67 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
68 
69 /*
70  * Basic stuff
71  */
73 {
74  struct usb_device *udev = dev->udev;
75  int ret;
76 
77  ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
78  0x01,
80  value,
81  index,
82  NULL,
83  0,
84  500);
85  if (ret < 0)
86  return ret;
87  else
88  return 0;
89 }
90 
92 {
93  struct usb_device *udev = dev->udev;
94  int ret;
95 
96  ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
97  0x00,
99  0x00,
100  index,
101  (u8 *) value,
102  sizeof(u8),
103  500);
104  if (ret < 0)
105  return ret;
106  else
107  return 0;
108 }
109 
110 static int stk_start_stream(struct stk_camera *dev)
111 {
112  int value;
113  int i, ret;
114  int value_116, value_117;
115 
116  if (!is_present(dev))
117  return -ENODEV;
118  if (!is_memallocd(dev) || !is_initialised(dev)) {
119  STK_ERROR("FIXME: Buffers are not allocated\n");
120  return -EFAULT;
121  }
122  ret = usb_set_interface(dev->udev, 0, 5);
123 
124  if (ret < 0)
125  STK_ERROR("usb_set_interface failed !\n");
126  if (stk_sensor_wakeup(dev))
127  STK_ERROR("error awaking the sensor\n");
128 
129  stk_camera_read_reg(dev, 0x0116, &value_116);
130  stk_camera_read_reg(dev, 0x0117, &value_117);
131 
132  stk_camera_write_reg(dev, 0x0116, 0x0000);
133  stk_camera_write_reg(dev, 0x0117, 0x0000);
134 
135  stk_camera_read_reg(dev, 0x0100, &value);
136  stk_camera_write_reg(dev, 0x0100, value | 0x80);
137 
138  stk_camera_write_reg(dev, 0x0116, value_116);
139  stk_camera_write_reg(dev, 0x0117, value_117);
140  for (i = 0; i < MAX_ISO_BUFS; i++) {
141  if (dev->isobufs[i].urb) {
142  ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
143  atomic_inc(&dev->urbs_used);
144  if (ret)
145  return ret;
146  }
147  }
148  set_streaming(dev);
149  return 0;
150 }
151 
152 static int stk_stop_stream(struct stk_camera *dev)
153 {
154  int value;
155  int i;
156  if (is_present(dev)) {
157  stk_camera_read_reg(dev, 0x0100, &value);
158  stk_camera_write_reg(dev, 0x0100, value & ~0x80);
159  if (dev->isobufs != NULL) {
160  for (i = 0; i < MAX_ISO_BUFS; i++) {
161  if (dev->isobufs[i].urb)
162  usb_kill_urb(dev->isobufs[i].urb);
163  }
164  }
165  unset_streaming(dev);
166 
167  if (usb_set_interface(dev->udev, 0, 0))
168  STK_ERROR("usb_set_interface failed !\n");
169  if (stk_sensor_sleep(dev))
170  STK_ERROR("error suspending the sensor\n");
171  }
172  return 0;
173 }
174 
175 /*
176  * This seems to be the shortest init sequence we
177  * must do in order to find the sensor
178  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
179  * is also reset. Maybe powers down it?
180  * Rest of values don't make a difference
181  */
182 
183 static struct regval stk1125_initvals[] = {
184  /*TODO: What means this sequence? */
185  {0x0000, 0x24},
186  {0x0100, 0x21},
187  {0x0002, 0x68},
188  {0x0003, 0x80},
189  {0x0005, 0x00},
190  {0x0007, 0x03},
191  {0x000d, 0x00},
192  {0x000f, 0x02},
193  {0x0300, 0x12},
194  {0x0350, 0x41},
195  {0x0351, 0x00},
196  {0x0352, 0x00},
197  {0x0353, 0x00},
198  {0x0018, 0x10},
199  {0x0019, 0x00},
200  {0x001b, 0x0e},
201  {0x001c, 0x46},
202  {0x0300, 0x80},
203  {0x001a, 0x04},
204  {0x0110, 0x00},
205  {0x0111, 0x00},
206  {0x0112, 0x00},
207  {0x0113, 0x00},
208 
209  {0xffff, 0xff},
210 };
211 
212 
213 static int stk_initialise(struct stk_camera *dev)
214 {
215  struct regval *rv;
216  int ret;
217  if (!is_present(dev))
218  return -ENODEV;
219  if (is_initialised(dev))
220  return 0;
221  rv = stk1125_initvals;
222  while (rv->reg != 0xffff) {
223  ret = stk_camera_write_reg(dev, rv->reg, rv->val);
224  if (ret)
225  return ret;
226  rv++;
227  }
228  if (stk_sensor_init(dev) == 0) {
229  set_initialised(dev);
230  return 0;
231  } else
232  return -1;
233 }
234 
235 /* *********************************************** */
236 /*
237  * This function is called as an URB transfert is complete (Isochronous pipe).
238  * So, the traitement is done in interrupt time, so it has be fast, not crash,
239  * and not stall. Neat.
240  */
241 static void stk_isoc_handler(struct urb *urb)
242 {
243  int i;
244  int ret;
245  int framelen;
246  unsigned long flags;
247 
248  unsigned char *fill = NULL;
249  unsigned char *iso_buf = NULL;
250 
251  struct stk_camera *dev;
252  struct stk_sio_buffer *fb;
253 
254  dev = (struct stk_camera *) urb->context;
255 
256  if (dev == NULL) {
257  STK_ERROR("isoc_handler called with NULL device !\n");
258  return;
259  }
260 
261  if (urb->status == -ENOENT || urb->status == -ECONNRESET
262  || urb->status == -ESHUTDOWN) {
263  atomic_dec(&dev->urbs_used);
264  return;
265  }
266 
267  spin_lock_irqsave(&dev->spinlock, flags);
268 
269  if (urb->status != -EINPROGRESS && urb->status != 0) {
270  STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
271  goto resubmit;
272  }
273 
274  if (list_empty(&dev->sio_avail)) {
275  /*FIXME Stop streaming after a while */
276  (void) (printk_ratelimit() &&
277  STK_ERROR("isoc_handler without available buffer!\n"));
278  goto resubmit;
279  }
280  fb = list_first_entry(&dev->sio_avail,
281  struct stk_sio_buffer, list);
282  fill = fb->buffer + fb->v4lbuf.bytesused;
283 
284  for (i = 0; i < urb->number_of_packets; i++) {
285  if (urb->iso_frame_desc[i].status != 0) {
286  if (urb->iso_frame_desc[i].status != -EXDEV)
287  STK_ERROR("Frame %d has error %d\n", i,
288  urb->iso_frame_desc[i].status);
289  continue;
290  }
291  framelen = urb->iso_frame_desc[i].actual_length;
292  iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
293 
294  if (framelen <= 4)
295  continue; /* no data */
296 
297  /*
298  * we found something informational from there
299  * the isoc frames have to type of headers
300  * type1: 00 xx 00 00 or 20 xx 00 00
301  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
302  * xx is a sequencer which has never been seen over 0x3f
303  * imho data written down looks like bayer, i see similarities
304  * after every 640 bytes
305  */
306  if (*iso_buf & 0x80) {
307  framelen -= 8;
308  iso_buf += 8;
309  /* This marks a new frame */
310  if (fb->v4lbuf.bytesused != 0
311  && fb->v4lbuf.bytesused != dev->frame_size) {
312  (void) (printk_ratelimit() &&
313  STK_ERROR("frame %d, "
314  "bytesused=%d, skipping\n",
315  i, fb->v4lbuf.bytesused));
316  fb->v4lbuf.bytesused = 0;
317  fill = fb->buffer;
318  } else if (fb->v4lbuf.bytesused == dev->frame_size) {
319  if (list_is_singular(&dev->sio_avail)) {
320  /* Always reuse the last buffer */
321  fb->v4lbuf.bytesused = 0;
322  fill = fb->buffer;
323  } else {
324  list_move_tail(dev->sio_avail.next,
325  &dev->sio_full);
326  wake_up(&dev->wait_frame);
327  fb = list_first_entry(&dev->sio_avail,
328  struct stk_sio_buffer, list);
329  fb->v4lbuf.bytesused = 0;
330  fill = fb->buffer;
331  }
332  }
333  } else {
334  framelen -= 4;
335  iso_buf += 4;
336  }
337 
338  /* Our buffer is full !!! */
339  if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
340  (void) (printk_ratelimit() &&
341  STK_ERROR("Frame buffer overflow, lost sync\n"));
342  /*FIXME Do something here? */
343  continue;
344  }
345  spin_unlock_irqrestore(&dev->spinlock, flags);
346  memcpy(fill, iso_buf, framelen);
347  spin_lock_irqsave(&dev->spinlock, flags);
348  fill += framelen;
349 
350  /* New size of our buffer */
351  fb->v4lbuf.bytesused += framelen;
352  }
353 
354 resubmit:
355  spin_unlock_irqrestore(&dev->spinlock, flags);
356  urb->dev = dev->udev;
357  ret = usb_submit_urb(urb, GFP_ATOMIC);
358  if (ret != 0) {
359  STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
360  ret);
361  }
362 }
363 
364 /* -------------------------------------------- */
365 
366 static int stk_prepare_iso(struct stk_camera *dev)
367 {
368  void *kbuf;
369  int i, j;
370  struct urb *urb;
371  struct usb_device *udev;
372 
373  if (dev == NULL)
374  return -ENXIO;
375  udev = dev->udev;
376 
377  if (dev->isobufs)
378  STK_ERROR("isobufs already allocated. Bad\n");
379  else
380  dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
381  GFP_KERNEL);
382  if (dev->isobufs == NULL) {
383  STK_ERROR("Unable to allocate iso buffers\n");
384  return -ENOMEM;
385  }
386  for (i = 0; i < MAX_ISO_BUFS; i++) {
387  if (dev->isobufs[i].data == NULL) {
388  kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
389  if (kbuf == NULL) {
390  STK_ERROR("Failed to allocate iso buffer %d\n",
391  i);
392  goto isobufs_out;
393  }
394  dev->isobufs[i].data = kbuf;
395  } else
396  STK_ERROR("isobuf data already allocated\n");
397  if (dev->isobufs[i].urb == NULL) {
399  if (urb == NULL) {
400  STK_ERROR("Failed to allocate URB %d\n", i);
401  goto isobufs_out;
402  }
403  dev->isobufs[i].urb = urb;
404  } else {
405  STK_ERROR("Killing URB\n");
406  usb_kill_urb(dev->isobufs[i].urb);
407  urb = dev->isobufs[i].urb;
408  }
409  urb->interval = 1;
410  urb->dev = udev;
411  urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
412  urb->transfer_flags = URB_ISO_ASAP;
413  urb->transfer_buffer = dev->isobufs[i].data;
414  urb->transfer_buffer_length = ISO_BUFFER_SIZE;
415  urb->complete = stk_isoc_handler;
416  urb->context = dev;
417  urb->start_frame = 0;
418  urb->number_of_packets = ISO_FRAMES_PER_DESC;
419 
420  for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
421  urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
422  urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
423  }
424  }
425  set_memallocd(dev);
426  return 0;
427 
428 isobufs_out:
429  for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
430  kfree(dev->isobufs[i].data);
431  for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
432  usb_free_urb(dev->isobufs[i].urb);
433  kfree(dev->isobufs);
434  dev->isobufs = NULL;
435  return -ENOMEM;
436 }
437 
438 static void stk_clean_iso(struct stk_camera *dev)
439 {
440  int i;
441 
442  if (dev == NULL || dev->isobufs == NULL)
443  return;
444 
445  for (i = 0; i < MAX_ISO_BUFS; i++) {
446  struct urb *urb;
447 
448  urb = dev->isobufs[i].urb;
449  if (urb) {
450  if (atomic_read(&dev->urbs_used) && is_present(dev))
451  usb_kill_urb(urb);
452  usb_free_urb(urb);
453  }
454  kfree(dev->isobufs[i].data);
455  }
456  kfree(dev->isobufs);
457  dev->isobufs = NULL;
458  unset_memallocd(dev);
459 }
460 
461 static int stk_setup_siobuf(struct stk_camera *dev, int index)
462 {
463  struct stk_sio_buffer *buf = dev->sio_bufs + index;
464  INIT_LIST_HEAD(&buf->list);
465  buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
466  buf->buffer = vmalloc_user(buf->v4lbuf.length);
467  if (buf->buffer == NULL)
468  return -ENOMEM;
469  buf->mapcount = 0;
470  buf->dev = dev;
471  buf->v4lbuf.index = index;
473  buf->v4lbuf.field = V4L2_FIELD_NONE;
474  buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
475  buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
476  return 0;
477 }
478 
479 static int stk_free_sio_buffers(struct stk_camera *dev)
480 {
481  int i;
482  int nbufs;
483  unsigned long flags;
484  if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
485  return 0;
486  /*
487  * If any buffers are mapped, we cannot free them at all.
488  */
489  for (i = 0; i < dev->n_sbufs; i++) {
490  if (dev->sio_bufs[i].mapcount > 0)
491  return -EBUSY;
492  }
493  /*
494  * OK, let's do it.
495  */
496  spin_lock_irqsave(&dev->spinlock, flags);
497  INIT_LIST_HEAD(&dev->sio_avail);
498  INIT_LIST_HEAD(&dev->sio_full);
499  nbufs = dev->n_sbufs;
500  dev->n_sbufs = 0;
501  spin_unlock_irqrestore(&dev->spinlock, flags);
502  for (i = 0; i < nbufs; i++) {
503  if (dev->sio_bufs[i].buffer != NULL)
504  vfree(dev->sio_bufs[i].buffer);
505  }
506  kfree(dev->sio_bufs);
507  dev->sio_bufs = NULL;
508  return 0;
509 }
510 
511 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
512 {
513  int i;
514  if (dev->sio_bufs != NULL)
515  STK_ERROR("sio_bufs already allocated\n");
516  else {
517  dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
518  GFP_KERNEL);
519  if (dev->sio_bufs == NULL)
520  return -ENOMEM;
521  for (i = 0; i < n_sbufs; i++) {
522  if (stk_setup_siobuf(dev, i))
523  return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
524  dev->n_sbufs = i+1;
525  }
526  }
527  return 0;
528 }
529 
530 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
531 {
532  int err;
533  err = stk_prepare_iso(dev);
534  if (err) {
535  stk_clean_iso(dev);
536  return err;
537  }
538  err = stk_prepare_sio_buffers(dev, n_sbufs);
539  if (err) {
540  stk_free_sio_buffers(dev);
541  return err;
542  }
543  return 0;
544 }
545 
546 static void stk_free_buffers(struct stk_camera *dev)
547 {
548  stk_clean_iso(dev);
549  stk_free_sio_buffers(dev);
550 }
551 /* -------------------------------------------- */
552 
553 /* v4l file operations */
554 
555 static int v4l_stk_open(struct file *fp)
556 {
557  struct stk_camera *dev;
558  struct video_device *vdev;
559 
560  vdev = video_devdata(fp);
561  dev = vdev_to_camera(vdev);
562 
563  if (dev == NULL || !is_present(dev))
564  return -ENXIO;
565 
566  if (!first_init)
567  stk_camera_write_reg(dev, 0x0, 0x24);
568  else
569  first_init = 0;
570 
571  fp->private_data = dev;
572  usb_autopm_get_interface(dev->interface);
573 
574  return 0;
575 }
576 
577 static int v4l_stk_release(struct file *fp)
578 {
579  struct stk_camera *dev = fp->private_data;
580 
581  if (dev->owner == fp) {
582  stk_stop_stream(dev);
583  stk_free_buffers(dev);
584  stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
585  unset_initialised(dev);
586  dev->owner = NULL;
587  }
588 
589  if (is_present(dev))
590  usb_autopm_put_interface(dev->interface);
591 
592  return 0;
593 }
594 
595 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
596  size_t count, loff_t *f_pos)
597 {
598  int i;
599  int ret;
600  unsigned long flags;
601  struct stk_sio_buffer *sbuf;
602  struct stk_camera *dev = fp->private_data;
603 
604  if (!is_present(dev))
605  return -EIO;
606  if (dev->owner && dev->owner != fp)
607  return -EBUSY;
608  dev->owner = fp;
609  if (!is_streaming(dev)) {
610  if (stk_initialise(dev)
611  || stk_allocate_buffers(dev, 3)
612  || stk_start_stream(dev))
613  return -ENOMEM;
614  spin_lock_irqsave(&dev->spinlock, flags);
615  for (i = 0; i < dev->n_sbufs; i++) {
616  list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
617  dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
618  }
619  spin_unlock_irqrestore(&dev->spinlock, flags);
620  }
621  if (*f_pos == 0) {
622  if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
623  return -EWOULDBLOCK;
625  !list_empty(&dev->sio_full) || !is_present(dev));
626  if (ret)
627  return ret;
628  if (!is_present(dev))
629  return -EIO;
630  }
631  if (count + *f_pos > dev->frame_size)
632  count = dev->frame_size - *f_pos;
633  spin_lock_irqsave(&dev->spinlock, flags);
634  if (list_empty(&dev->sio_full)) {
635  spin_unlock_irqrestore(&dev->spinlock, flags);
636  STK_ERROR("BUG: No siobufs ready\n");
637  return 0;
638  }
639  sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
640  spin_unlock_irqrestore(&dev->spinlock, flags);
641 
642  if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
643  return -EFAULT;
644 
645  *f_pos += count;
646 
647  if (*f_pos >= dev->frame_size) {
648  *f_pos = 0;
649  spin_lock_irqsave(&dev->spinlock, flags);
650  list_move_tail(&sbuf->list, &dev->sio_avail);
651  spin_unlock_irqrestore(&dev->spinlock, flags);
652  }
653  return count;
654 }
655 
656 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
657 {
658  struct stk_camera *dev = fp->private_data;
659 
660  poll_wait(fp, &dev->wait_frame, wait);
661 
662  if (!is_present(dev))
663  return POLLERR;
664 
665  if (!list_empty(&dev->sio_full))
666  return POLLIN | POLLRDNORM;
667 
668  return 0;
669 }
670 
671 
672 static void stk_v4l_vm_open(struct vm_area_struct *vma)
673 {
674  struct stk_sio_buffer *sbuf = vma->vm_private_data;
675  sbuf->mapcount++;
676 }
677 static void stk_v4l_vm_close(struct vm_area_struct *vma)
678 {
679  struct stk_sio_buffer *sbuf = vma->vm_private_data;
680  sbuf->mapcount--;
681  if (sbuf->mapcount == 0)
682  sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
683 }
684 static const struct vm_operations_struct stk_v4l_vm_ops = {
685  .open = stk_v4l_vm_open,
686  .close = stk_v4l_vm_close
687 };
688 
689 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
690 {
691  unsigned int i;
692  int ret;
693  unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
694  struct stk_camera *dev = fp->private_data;
695  struct stk_sio_buffer *sbuf = NULL;
696 
697  if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
698  return -EINVAL;
699 
700  for (i = 0; i < dev->n_sbufs; i++) {
701  if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
702  sbuf = dev->sio_bufs + i;
703  break;
704  }
705  }
706  if (sbuf == NULL)
707  return -EINVAL;
708  ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
709  if (ret)
710  return ret;
711  vma->vm_flags |= VM_DONTEXPAND;
712  vma->vm_private_data = sbuf;
713  vma->vm_ops = &stk_v4l_vm_ops;
714  sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
715  stk_v4l_vm_open(vma);
716  return 0;
717 }
718 
719 /* v4l ioctl handlers */
720 
721 static int stk_vidioc_querycap(struct file *filp,
722  void *priv, struct v4l2_capability *cap)
723 {
724  strcpy(cap->driver, "stk");
725  strcpy(cap->card, "stk");
727 
730  return 0;
731 }
732 
733 static int stk_vidioc_enum_input(struct file *filp,
734  void *priv, struct v4l2_input *input)
735 {
736  if (input->index != 0)
737  return -EINVAL;
738 
739  strcpy(input->name, "Syntek USB Camera");
740  input->type = V4L2_INPUT_TYPE_CAMERA;
741  return 0;
742 }
743 
744 
745 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
746 {
747  *i = 0;
748  return 0;
749 }
750 
751 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
752 {
753  if (i != 0)
754  return -EINVAL;
755  else
756  return 0;
757 }
758 
759 /* from vivi.c */
760 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
761 {
762  return 0;
763 }
764 
765 /* List of all V4Lv2 controls supported by the driver */
766 static struct v4l2_queryctrl stk_controls[] = {
767  {
768  .id = V4L2_CID_BRIGHTNESS,
769  .type = V4L2_CTRL_TYPE_INTEGER,
770  .name = "Brightness",
771  .minimum = 0,
772  .maximum = 0xffff,
773  .step = 0x0100,
774  .default_value = 0x6000,
775  },
776  {
777  .id = V4L2_CID_HFLIP,
778  .type = V4L2_CTRL_TYPE_BOOLEAN,
779  .name = "Horizontal Flip",
780  .minimum = 0,
781  .maximum = 1,
782  .step = 1,
783  .default_value = 1,
784  },
785  {
786  .id = V4L2_CID_VFLIP,
787  .type = V4L2_CTRL_TYPE_BOOLEAN,
788  .name = "Vertical Flip",
789  .minimum = 0,
790  .maximum = 1,
791  .step = 1,
792  .default_value = 1,
793  },
794 };
795 
796 static int stk_vidioc_queryctrl(struct file *filp,
797  void *priv, struct v4l2_queryctrl *c)
798 {
799  int i;
800  int nbr;
801  nbr = ARRAY_SIZE(stk_controls);
802 
803  for (i = 0; i < nbr; i++) {
804  if (stk_controls[i].id == c->id) {
805  memcpy(c, &stk_controls[i],
806  sizeof(struct v4l2_queryctrl));
807  return 0;
808  }
809  }
810  return -EINVAL;
811 }
812 
813 static int stk_vidioc_g_ctrl(struct file *filp,
814  void *priv, struct v4l2_control *c)
815 {
816  struct stk_camera *dev = priv;
817  switch (c->id) {
818  case V4L2_CID_BRIGHTNESS:
819  c->value = dev->vsettings.brightness;
820  break;
821  case V4L2_CID_HFLIP:
822  c->value = dev->vsettings.hflip;
823  break;
824  case V4L2_CID_VFLIP:
825  c->value = dev->vsettings.vflip;
826  break;
827  default:
828  return -EINVAL;
829  }
830  return 0;
831 }
832 
833 static int stk_vidioc_s_ctrl(struct file *filp,
834  void *priv, struct v4l2_control *c)
835 {
836  struct stk_camera *dev = priv;
837  switch (c->id) {
838  case V4L2_CID_BRIGHTNESS:
839  dev->vsettings.brightness = c->value;
840  return stk_sensor_set_brightness(dev, c->value >> 8);
841  case V4L2_CID_HFLIP:
842  dev->vsettings.hflip = c->value;
843  return 0;
844  case V4L2_CID_VFLIP:
845  dev->vsettings.vflip = c->value;
846  return 0;
847  default:
848  return -EINVAL;
849  }
850  return 0;
851 }
852 
853 
854 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
855  void *priv, struct v4l2_fmtdesc *fmtd)
856 {
857  switch (fmtd->index) {
858  case 0:
860  strcpy(fmtd->description, "r5g6b5");
861  break;
862  case 1:
864  strcpy(fmtd->description, "r5g6b5BE");
865  break;
866  case 2:
868  strcpy(fmtd->description, "yuv4:2:2");
869  break;
870  case 3:
872  strcpy(fmtd->description, "Raw bayer");
873  break;
874  case 4:
876  strcpy(fmtd->description, "yuv4:2:2");
877  break;
878  default:
879  return -EINVAL;
880  }
881  return 0;
882 }
883 
884 static struct stk_size {
885  unsigned w;
886  unsigned h;
887  enum stk_mode m;
888 } stk_sizes[] = {
889  { .w = 1280, .h = 1024, .m = MODE_SXGA, },
890  { .w = 640, .h = 480, .m = MODE_VGA, },
891  { .w = 352, .h = 288, .m = MODE_CIF, },
892  { .w = 320, .h = 240, .m = MODE_QVGA, },
893  { .w = 176, .h = 144, .m = MODE_QCIF, },
894 };
895 
896 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
897  void *priv, struct v4l2_format *f)
898 {
899  struct v4l2_pix_format *pix_format = &f->fmt.pix;
900  struct stk_camera *dev = priv;
901  int i;
902 
903  for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
904  stk_sizes[i].m != dev->vsettings.mode; i++)
905  ;
906  if (i == ARRAY_SIZE(stk_sizes)) {
907  STK_ERROR("ERROR: mode invalid\n");
908  return -EINVAL;
909  }
910  pix_format->width = stk_sizes[i].w;
911  pix_format->height = stk_sizes[i].h;
912  pix_format->field = V4L2_FIELD_NONE;
913  pix_format->colorspace = V4L2_COLORSPACE_SRGB;
914  pix_format->pixelformat = dev->vsettings.palette;
915  if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
916  pix_format->bytesperline = pix_format->width;
917  else
918  pix_format->bytesperline = 2 * pix_format->width;
919  pix_format->sizeimage = pix_format->bytesperline
920  * pix_format->height;
921  return 0;
922 }
923 
924 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
925  void *priv, struct v4l2_format *fmtd)
926 {
927  int i;
928  switch (fmtd->fmt.pix.pixelformat) {
929  case V4L2_PIX_FMT_RGB565:
931  case V4L2_PIX_FMT_UYVY:
932  case V4L2_PIX_FMT_YUYV:
933  case V4L2_PIX_FMT_SBGGR8:
934  break;
935  default:
936  return -EINVAL;
937  }
938  for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
939  if (fmtd->fmt.pix.width > stk_sizes[i].w)
940  break;
941  }
942  if (i == ARRAY_SIZE(stk_sizes)
943  || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
944  < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
945  fmtd->fmt.pix.height = stk_sizes[i-1].h;
946  fmtd->fmt.pix.width = stk_sizes[i-1].w;
947  fmtd->fmt.pix.priv = i - 1;
948  } else {
949  fmtd->fmt.pix.height = stk_sizes[i].h;
950  fmtd->fmt.pix.width = stk_sizes[i].w;
951  fmtd->fmt.pix.priv = i;
952  }
953 
954  fmtd->fmt.pix.field = V4L2_FIELD_NONE;
955  fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
956  if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
957  fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
958  else
959  fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
960  fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
961  * fmtd->fmt.pix.height;
962  return 0;
963 }
964 
965 static int stk_setup_format(struct stk_camera *dev)
966 {
967  int i = 0;
968  int depth;
969  if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
970  depth = 1;
971  else
972  depth = 2;
973  while (i < ARRAY_SIZE(stk_sizes) &&
974  stk_sizes[i].m != dev->vsettings.mode)
975  i++;
976  if (i == ARRAY_SIZE(stk_sizes)) {
977  STK_ERROR("Something is broken in %s\n", __func__);
978  return -EFAULT;
979  }
980  /* This registers controls some timings, not sure of what. */
981  stk_camera_write_reg(dev, 0x001b, 0x0e);
982  if (dev->vsettings.mode == MODE_SXGA)
983  stk_camera_write_reg(dev, 0x001c, 0x0e);
984  else
985  stk_camera_write_reg(dev, 0x001c, 0x46);
986  /*
987  * Registers 0x0115 0x0114 are the size of each line (bytes),
988  * regs 0x0117 0x0116 are the heigth of the image.
989  */
990  stk_camera_write_reg(dev, 0x0115,
991  ((stk_sizes[i].w * depth) >> 8) & 0xff);
992  stk_camera_write_reg(dev, 0x0114,
993  (stk_sizes[i].w * depth) & 0xff);
994  stk_camera_write_reg(dev, 0x0117,
995  (stk_sizes[i].h >> 8) & 0xff);
996  stk_camera_write_reg(dev, 0x0116,
997  stk_sizes[i].h & 0xff);
998  return stk_sensor_configure(dev);
999 }
1000 
1001 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1002  void *priv, struct v4l2_format *fmtd)
1003 {
1004  int ret;
1005  struct stk_camera *dev = priv;
1006 
1007  if (dev == NULL)
1008  return -ENODEV;
1009  if (!is_present(dev))
1010  return -ENODEV;
1011  if (is_streaming(dev))
1012  return -EBUSY;
1013  if (dev->owner && dev->owner != filp)
1014  return -EBUSY;
1015  ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1016  if (ret)
1017  return ret;
1018  dev->owner = filp;
1019 
1020  dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1021  stk_free_buffers(dev);
1022  dev->frame_size = fmtd->fmt.pix.sizeimage;
1023  dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1024 
1025  stk_initialise(dev);
1026  return stk_setup_format(dev);
1027 }
1028 
1029 static int stk_vidioc_reqbufs(struct file *filp,
1030  void *priv, struct v4l2_requestbuffers *rb)
1031 {
1032  struct stk_camera *dev = priv;
1033 
1034  if (dev == NULL)
1035  return -ENODEV;
1036  if (rb->memory != V4L2_MEMORY_MMAP)
1037  return -EINVAL;
1038  if (is_streaming(dev)
1039  || (dev->owner && dev->owner != filp))
1040  return -EBUSY;
1041  dev->owner = filp;
1042 
1043  /*FIXME If they ask for zero, we must stop streaming and free */
1044  if (rb->count < 3)
1045  rb->count = 3;
1046  /* Arbitrary limit */
1047  else if (rb->count > 5)
1048  rb->count = 5;
1049 
1050  stk_allocate_buffers(dev, rb->count);
1051  rb->count = dev->n_sbufs;
1052  return 0;
1053 }
1054 
1055 static int stk_vidioc_querybuf(struct file *filp,
1056  void *priv, struct v4l2_buffer *buf)
1057 {
1058  struct stk_camera *dev = priv;
1059  struct stk_sio_buffer *sbuf;
1060 
1061  if (buf->index >= dev->n_sbufs)
1062  return -EINVAL;
1063  sbuf = dev->sio_bufs + buf->index;
1064  *buf = sbuf->v4lbuf;
1065  return 0;
1066 }
1067 
1068 static int stk_vidioc_qbuf(struct file *filp,
1069  void *priv, struct v4l2_buffer *buf)
1070 {
1071  struct stk_camera *dev = priv;
1072  struct stk_sio_buffer *sbuf;
1073  unsigned long flags;
1074 
1075  if (buf->memory != V4L2_MEMORY_MMAP)
1076  return -EINVAL;
1077 
1078  if (buf->index >= dev->n_sbufs)
1079  return -EINVAL;
1080  sbuf = dev->sio_bufs + buf->index;
1081  if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1082  return 0;
1083  sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1084  sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1085  spin_lock_irqsave(&dev->spinlock, flags);
1086  list_add_tail(&sbuf->list, &dev->sio_avail);
1087  *buf = sbuf->v4lbuf;
1088  spin_unlock_irqrestore(&dev->spinlock, flags);
1089  return 0;
1090 }
1091 
1092 static int stk_vidioc_dqbuf(struct file *filp,
1093  void *priv, struct v4l2_buffer *buf)
1094 {
1095  struct stk_camera *dev = priv;
1096  struct stk_sio_buffer *sbuf;
1097  unsigned long flags;
1098  int ret;
1099 
1100  if (!is_streaming(dev))
1101  return -EINVAL;
1102 
1103  if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1104  return -EWOULDBLOCK;
1106  !list_empty(&dev->sio_full) || !is_present(dev));
1107  if (ret)
1108  return ret;
1109  if (!is_present(dev))
1110  return -EIO;
1111 
1112  spin_lock_irqsave(&dev->spinlock, flags);
1113  sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1114  list_del_init(&sbuf->list);
1115  spin_unlock_irqrestore(&dev->spinlock, flags);
1116  sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1117  sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1118  sbuf->v4lbuf.sequence = ++dev->sequence;
1119  do_gettimeofday(&sbuf->v4lbuf.timestamp);
1120 
1121  *buf = sbuf->v4lbuf;
1122  return 0;
1123 }
1124 
1125 static int stk_vidioc_streamon(struct file *filp,
1126  void *priv, enum v4l2_buf_type type)
1127 {
1128  struct stk_camera *dev = priv;
1129  if (is_streaming(dev))
1130  return 0;
1131  if (dev->sio_bufs == NULL)
1132  return -EINVAL;
1133  dev->sequence = 0;
1134  return stk_start_stream(dev);
1135 }
1136 
1137 static int stk_vidioc_streamoff(struct file *filp,
1138  void *priv, enum v4l2_buf_type type)
1139 {
1140  struct stk_camera *dev = priv;
1141  unsigned long flags;
1142  int i;
1143  stk_stop_stream(dev);
1144  spin_lock_irqsave(&dev->spinlock, flags);
1145  INIT_LIST_HEAD(&dev->sio_avail);
1146  INIT_LIST_HEAD(&dev->sio_full);
1147  for (i = 0; i < dev->n_sbufs; i++) {
1148  INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1149  dev->sio_bufs[i].v4lbuf.flags = 0;
1150  }
1151  spin_unlock_irqrestore(&dev->spinlock, flags);
1152  return 0;
1153 }
1154 
1155 
1156 static int stk_vidioc_g_parm(struct file *filp,
1157  void *priv, struct v4l2_streamparm *sp)
1158 {
1159  /*FIXME This is not correct */
1160  sp->parm.capture.timeperframe.numerator = 1;
1161  sp->parm.capture.timeperframe.denominator = 30;
1162  sp->parm.capture.readbuffers = 2;
1163  return 0;
1164 }
1165 
1166 static int stk_vidioc_enum_framesizes(struct file *filp,
1167  void *priv, struct v4l2_frmsizeenum *frms)
1168 {
1169  if (frms->index >= ARRAY_SIZE(stk_sizes))
1170  return -EINVAL;
1171  switch (frms->pixel_format) {
1172  case V4L2_PIX_FMT_RGB565:
1173  case V4L2_PIX_FMT_RGB565X:
1174  case V4L2_PIX_FMT_UYVY:
1175  case V4L2_PIX_FMT_YUYV:
1176  case V4L2_PIX_FMT_SBGGR8:
1178  frms->discrete.width = stk_sizes[frms->index].w;
1179  frms->discrete.height = stk_sizes[frms->index].h;
1180  return 0;
1181  default: return -EINVAL;
1182  }
1183 }
1184 
1185 static struct v4l2_file_operations v4l_stk_fops = {
1186  .owner = THIS_MODULE,
1187  .open = v4l_stk_open,
1188  .release = v4l_stk_release,
1189  .read = v4l_stk_read,
1190  .poll = v4l_stk_poll,
1191  .mmap = v4l_stk_mmap,
1192  .ioctl = video_ioctl2,
1193 };
1194 
1195 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1196  .vidioc_querycap = stk_vidioc_querycap,
1197  .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1198  .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1199  .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1200  .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1201  .vidioc_enum_input = stk_vidioc_enum_input,
1202  .vidioc_s_input = stk_vidioc_s_input,
1203  .vidioc_g_input = stk_vidioc_g_input,
1204  .vidioc_s_std = stk_vidioc_s_std,
1205  .vidioc_reqbufs = stk_vidioc_reqbufs,
1206  .vidioc_querybuf = stk_vidioc_querybuf,
1207  .vidioc_qbuf = stk_vidioc_qbuf,
1208  .vidioc_dqbuf = stk_vidioc_dqbuf,
1209  .vidioc_streamon = stk_vidioc_streamon,
1210  .vidioc_streamoff = stk_vidioc_streamoff,
1211  .vidioc_queryctrl = stk_vidioc_queryctrl,
1212  .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1213  .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1214  .vidioc_g_parm = stk_vidioc_g_parm,
1215  .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1216 };
1217 
1218 static void stk_v4l_dev_release(struct video_device *vd)
1219 {
1220  struct stk_camera *dev = vdev_to_camera(vd);
1221 
1222  if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1223  STK_ERROR("We are leaking memory\n");
1224  usb_put_intf(dev->interface);
1225  kfree(dev);
1226 }
1227 
1228 static struct video_device stk_v4l_data = {
1229  .name = "stkwebcam",
1230  .tvnorms = V4L2_STD_UNKNOWN,
1231  .current_norm = V4L2_STD_UNKNOWN,
1232  .fops = &v4l_stk_fops,
1233  .ioctl_ops = &v4l_stk_ioctl_ops,
1234  .release = stk_v4l_dev_release,
1235 };
1236 
1237 
1238 static int stk_register_video_device(struct stk_camera *dev)
1239 {
1240  int err;
1241 
1242  dev->vdev = stk_v4l_data;
1243  dev->vdev.debug = debug;
1244  dev->vdev.parent = &dev->interface->dev;
1245  err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1246  if (err)
1247  STK_ERROR("v4l registration failed\n");
1248  else
1249  STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1250  video_device_node_name(&dev->vdev));
1251  return err;
1252 }
1253 
1254 
1255 /* USB Stuff */
1256 
1257 static int stk_camera_probe(struct usb_interface *interface,
1258  const struct usb_device_id *id)
1259 {
1260  int i;
1261  int err = 0;
1262 
1263  struct stk_camera *dev = NULL;
1264  struct usb_device *udev = interface_to_usbdev(interface);
1265  struct usb_host_interface *iface_desc;
1267 
1268  dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1269  if (dev == NULL) {
1270  STK_ERROR("Out of memory !\n");
1271  return -ENOMEM;
1272  }
1273 
1274  spin_lock_init(&dev->spinlock);
1276 
1277  dev->udev = udev;
1278  dev->interface = interface;
1279  usb_get_intf(interface);
1280 
1281  dev->vsettings.vflip = vflip;
1282  dev->vsettings.hflip = hflip;
1283  dev->n_sbufs = 0;
1284  set_present(dev);
1285 
1286  /* Set up the endpoint information
1287  * use only the first isoc-in endpoint
1288  * for the current alternate setting */
1289  iface_desc = interface->cur_altsetting;
1290 
1291  for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1292  endpoint = &iface_desc->endpoint[i].desc;
1293 
1294  if (!dev->isoc_ep
1295  && usb_endpoint_is_isoc_in(endpoint)) {
1296  /* we found an isoc in endpoint */
1297  dev->isoc_ep = usb_endpoint_num(endpoint);
1298  break;
1299  }
1300  }
1301  if (!dev->isoc_ep) {
1302  STK_ERROR("Could not find isoc-in endpoint");
1303  err = -ENODEV;
1304  goto error;
1305  }
1306  dev->vsettings.brightness = 0x7fff;
1307  dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1308  dev->vsettings.mode = MODE_VGA;
1309  dev->frame_size = 640 * 480 * 2;
1310 
1311  INIT_LIST_HEAD(&dev->sio_avail);
1312  INIT_LIST_HEAD(&dev->sio_full);
1313 
1314  usb_set_intfdata(interface, dev);
1315 
1316  err = stk_register_video_device(dev);
1317  if (err)
1318  goto error;
1319 
1320  return 0;
1321 
1322 error:
1323  kfree(dev);
1324  return err;
1325 }
1326 
1327 static void stk_camera_disconnect(struct usb_interface *interface)
1328 {
1329  struct stk_camera *dev = usb_get_intfdata(interface);
1330 
1331  usb_set_intfdata(interface, NULL);
1332  unset_present(dev);
1333 
1335 
1336  STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1337  video_device_node_name(&dev->vdev));
1338 
1340 }
1341 
1342 #ifdef CONFIG_PM
1343 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1344 {
1345  struct stk_camera *dev = usb_get_intfdata(intf);
1346  if (is_streaming(dev)) {
1347  stk_stop_stream(dev);
1348  /* yes, this is ugly */
1349  set_streaming(dev);
1350  }
1351  return 0;
1352 }
1353 
1354 static int stk_camera_resume(struct usb_interface *intf)
1355 {
1356  struct stk_camera *dev = usb_get_intfdata(intf);
1357  if (!is_initialised(dev))
1358  return 0;
1359  unset_initialised(dev);
1360  stk_initialise(dev);
1361  stk_camera_write_reg(dev, 0x0, 0x49);
1362  stk_setup_format(dev);
1363  if (is_streaming(dev))
1364  stk_start_stream(dev);
1365  return 0;
1366 }
1367 #endif
1368 
1369 static struct usb_driver stk_camera_driver = {
1370  .name = "stkwebcam",
1371  .probe = stk_camera_probe,
1372  .disconnect = stk_camera_disconnect,
1373  .id_table = stkwebcam_table,
1374 #ifdef CONFIG_PM
1375  .suspend = stk_camera_suspend,
1376  .resume = stk_camera_resume,
1377 #endif
1378 };
1379 
1380 module_usb_driver(stk_camera_driver);