Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6.git] / drivers / media / video / stk-webcam.c
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 <jsagarribay@gmail.com>
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 = 1;
42 module_param(hflip, bool, 0444);
43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
44
45 static bool vflip = 1;
46 module_param(vflip, bool, 0444);
47 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
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 <jsagarribay@gmail.com> 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  */
72 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
73 {
74         struct usb_device *udev = dev->udev;
75         int ret;
76
77         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
78                         0x01,
79                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
80                         value,
81                         index,
82                         NULL,
83                         0,
84                         500);
85         if (ret < 0)
86                 return ret;
87         else
88                 return 0;
89 }
90
91 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
92 {
93         struct usb_device *udev = dev->udev;
94         int ret;
95
96         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
97                         0x00,
98                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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) {
398                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
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;
472         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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;
624                 ret = wait_event_interruptible(dev->wait_frame,
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");
726         cap->version = DRIVER_VERSION_NUM;
727
728         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
729                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
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:
859                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
860                 strcpy(fmtd->description, "r5g6b5");
861                 break;
862         case 1:
863                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
864                 strcpy(fmtd->description, "r5g6b5BE");
865                 break;
866         case 2:
867                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
868                 strcpy(fmtd->description, "yuv4:2:2");
869                 break;
870         case 3:
871                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
872                 strcpy(fmtd->description, "Raw bayer");
873                 break;
874         case 4:
875                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
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:
930         case V4L2_PIX_FMT_RGB565X:
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;
1105         ret = wait_event_interruptible(dev->wait_frame,
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:
1177                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
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;
1266         struct usb_endpoint_descriptor *endpoint;
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);
1275         init_waitqueue_head(&dev->wait_frame);
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
1334         wake_up_interruptible(&dev->wait_frame);
1335
1336         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1337                  video_device_node_name(&dev->vdev));
1338
1339         video_unregister_device(&dev->vdev);
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);