media: tegra: Tegra V4L2 camera
[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 int hflip = 1;
42 module_param(hflip, bool, 0444);
43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
44
45 static int 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
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) },
63         { }
64 };
65 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
66
67 /*
68  * Basic stuff
69  */
70 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
71 {
72         struct usb_device *udev = dev->udev;
73         int ret;
74
75         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
76                         0x01,
77                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
78                         value,
79                         index,
80                         NULL,
81                         0,
82                         500);
83         if (ret < 0)
84                 return ret;
85         else
86                 return 0;
87 }
88
89 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
90 {
91         struct usb_device *udev = dev->udev;
92         int ret;
93
94         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
95                         0x00,
96                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97                         0x00,
98                         index,
99                         (u8 *) value,
100                         sizeof(u8),
101                         500);
102         if (ret < 0)
103                 return ret;
104         else
105                 return 0;
106 }
107
108 static int stk_start_stream(struct stk_camera *dev)
109 {
110         int value;
111         int i, ret;
112         int value_116, value_117;
113
114         if (!is_present(dev))
115                 return -ENODEV;
116         if (!is_memallocd(dev) || !is_initialised(dev)) {
117                 STK_ERROR("FIXME: Buffers are not allocated\n");
118                 return -EFAULT;
119         }
120         ret = usb_set_interface(dev->udev, 0, 5);
121
122         if (ret < 0)
123                 STK_ERROR("usb_set_interface failed !\n");
124         if (stk_sensor_wakeup(dev))
125                 STK_ERROR("error awaking the sensor\n");
126
127         stk_camera_read_reg(dev, 0x0116, &value_116);
128         stk_camera_read_reg(dev, 0x0117, &value_117);
129
130         stk_camera_write_reg(dev, 0x0116, 0x0000);
131         stk_camera_write_reg(dev, 0x0117, 0x0000);
132
133         stk_camera_read_reg(dev, 0x0100, &value);
134         stk_camera_write_reg(dev, 0x0100, value | 0x80);
135
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);
142                         if (ret)
143                                 return ret;
144                 }
145         }
146         set_streaming(dev);
147         return 0;
148 }
149
150 static int stk_stop_stream(struct stk_camera *dev)
151 {
152         int value;
153         int i;
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);
161                         }
162                 }
163                 unset_streaming(dev);
164
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");
169         }
170         return 0;
171 }
172
173 /*
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
179  */
180
181 static struct regval stk1125_initvals[] = {
182         /*TODO: What means this sequence? */
183         {0x0000, 0x24},
184         {0x0100, 0x21},
185         {0x0002, 0x68},
186         {0x0003, 0x80},
187         {0x0005, 0x00},
188         {0x0007, 0x03},
189         {0x000d, 0x00},
190         {0x000f, 0x02},
191         {0x0300, 0x12},
192         {0x0350, 0x41},
193         {0x0351, 0x00},
194         {0x0352, 0x00},
195         {0x0353, 0x00},
196         {0x0018, 0x10},
197         {0x0019, 0x00},
198         {0x001b, 0x0e},
199         {0x001c, 0x46},
200         {0x0300, 0x80},
201         {0x001a, 0x04},
202         {0x0110, 0x00},
203         {0x0111, 0x00},
204         {0x0112, 0x00},
205         {0x0113, 0x00},
206
207         {0xffff, 0xff},
208 };
209
210
211 static int stk_initialise(struct stk_camera *dev)
212 {
213         struct regval *rv;
214         int ret;
215         if (!is_present(dev))
216                 return -ENODEV;
217         if (is_initialised(dev))
218                 return 0;
219         rv = stk1125_initvals;
220         while (rv->reg != 0xffff) {
221                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
222                 if (ret)
223                         return ret;
224                 rv++;
225         }
226         if (stk_sensor_init(dev) == 0) {
227                 set_initialised(dev);
228                 return 0;
229         } else
230                 return -1;
231 }
232
233 /* *********************************************** */
234 /*
235  * This function is called as an URB transfert is complete (Isochronous pipe).
236  * So, the traitement is done in interrupt time, so it has be fast, not crash,
237  * and not stall. Neat.
238  */
239 static void stk_isoc_handler(struct urb *urb)
240 {
241         int i;
242         int ret;
243         int framelen;
244         unsigned long flags;
245
246         unsigned char *fill = NULL;
247         unsigned char *iso_buf = NULL;
248
249         struct stk_camera *dev;
250         struct stk_sio_buffer *fb;
251
252         dev = (struct stk_camera *) urb->context;
253
254         if (dev == NULL) {
255                 STK_ERROR("isoc_handler called with NULL device !\n");
256                 return;
257         }
258
259         if (urb->status == -ENOENT || urb->status == -ECONNRESET
260                 || urb->status == -ESHUTDOWN) {
261                 atomic_dec(&dev->urbs_used);
262                 return;
263         }
264
265         spin_lock_irqsave(&dev->spinlock, flags);
266
267         if (urb->status != -EINPROGRESS && urb->status != 0) {
268                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
269                 goto resubmit;
270         }
271
272         if (list_empty(&dev->sio_avail)) {
273                 /*FIXME Stop streaming after a while */
274                 (void) (printk_ratelimit() &&
275                 STK_ERROR("isoc_handler without available buffer!\n"));
276                 goto resubmit;
277         }
278         fb = list_first_entry(&dev->sio_avail,
279                         struct stk_sio_buffer, list);
280         fill = fb->buffer + fb->v4lbuf.bytesused;
281
282         for (i = 0; i < urb->number_of_packets; i++) {
283                 if (urb->iso_frame_desc[i].status != 0) {
284                         if (urb->iso_frame_desc[i].status != -EXDEV)
285                                 STK_ERROR("Frame %d has error %d\n", i,
286                                         urb->iso_frame_desc[i].status);
287                         continue;
288                 }
289                 framelen = urb->iso_frame_desc[i].actual_length;
290                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
291
292                 if (framelen <= 4)
293                         continue; /* no data */
294
295                 /*
296                  * we found something informational from there
297                  * the isoc frames have to type of headers
298                  * type1: 00 xx 00 00 or 20 xx 00 00
299                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
300                  * xx is a sequencer which has never been seen over 0x3f
301                  * imho data written down looks like bayer, i see similarities
302                  * after every 640 bytes
303                  */
304                 if (*iso_buf & 0x80) {
305                         framelen -= 8;
306                         iso_buf += 8;
307                         /* This marks a new frame */
308                         if (fb->v4lbuf.bytesused != 0
309                                 && fb->v4lbuf.bytesused != dev->frame_size) {
310                                 (void) (printk_ratelimit() &&
311                                 STK_ERROR("frame %d, "
312                                         "bytesused=%d, skipping\n",
313                                         i, fb->v4lbuf.bytesused));
314                                 fb->v4lbuf.bytesused = 0;
315                                 fill = fb->buffer;
316                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
317                                 if (list_is_singular(&dev->sio_avail)) {
318                                         /* Always reuse the last buffer */
319                                         fb->v4lbuf.bytesused = 0;
320                                         fill = fb->buffer;
321                                 } else {
322                                         list_move_tail(dev->sio_avail.next,
323                                                 &dev->sio_full);
324                                         wake_up(&dev->wait_frame);
325                                         fb = list_first_entry(&dev->sio_avail,
326                                                 struct stk_sio_buffer, list);
327                                         fb->v4lbuf.bytesused = 0;
328                                         fill = fb->buffer;
329                                 }
330                         }
331                 } else {
332                         framelen -= 4;
333                         iso_buf += 4;
334                 }
335
336                 /* Our buffer is full !!! */
337                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
338                         (void) (printk_ratelimit() &&
339                         STK_ERROR("Frame buffer overflow, lost sync\n"));
340                         /*FIXME Do something here? */
341                         continue;
342                 }
343                 spin_unlock_irqrestore(&dev->spinlock, flags);
344                 memcpy(fill, iso_buf, framelen);
345                 spin_lock_irqsave(&dev->spinlock, flags);
346                 fill += framelen;
347
348                 /* New size of our buffer */
349                 fb->v4lbuf.bytesused += framelen;
350         }
351
352 resubmit:
353         spin_unlock_irqrestore(&dev->spinlock, flags);
354         urb->dev = dev->udev;
355         ret = usb_submit_urb(urb, GFP_ATOMIC);
356         if (ret != 0) {
357                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
358                         ret);
359         }
360 }
361
362 /* -------------------------------------------- */
363
364 static int stk_prepare_iso(struct stk_camera *dev)
365 {
366         void *kbuf;
367         int i, j;
368         struct urb *urb;
369         struct usb_device *udev;
370
371         if (dev == NULL)
372                 return -ENXIO;
373         udev = dev->udev;
374
375         if (dev->isobufs)
376                 STK_ERROR("isobufs already allocated. Bad\n");
377         else
378                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
379                                         GFP_KERNEL);
380         if (dev->isobufs == NULL) {
381                 STK_ERROR("Unable to allocate iso buffers\n");
382                 return -ENOMEM;
383         }
384         for (i = 0; i < MAX_ISO_BUFS; i++) {
385                 if (dev->isobufs[i].data == NULL) {
386                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
387                         if (kbuf == NULL) {
388                                 STK_ERROR("Failed to allocate iso buffer %d\n",
389                                         i);
390                                 goto isobufs_out;
391                         }
392                         dev->isobufs[i].data = kbuf;
393                 } else
394                         STK_ERROR("isobuf data already allocated\n");
395                 if (dev->isobufs[i].urb == NULL) {
396                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
397                         if (urb == NULL) {
398                                 STK_ERROR("Failed to allocate URB %d\n", i);
399                                 goto isobufs_out;
400                         }
401                         dev->isobufs[i].urb = urb;
402                 } else {
403                         STK_ERROR("Killing URB\n");
404                         usb_kill_urb(dev->isobufs[i].urb);
405                         urb = dev->isobufs[i].urb;
406                 }
407                 urb->interval = 1;
408                 urb->dev = udev;
409                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
410                 urb->transfer_flags = URB_ISO_ASAP;
411                 urb->transfer_buffer = dev->isobufs[i].data;
412                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
413                 urb->complete = stk_isoc_handler;
414                 urb->context = dev;
415                 urb->start_frame = 0;
416                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
417
418                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
419                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
420                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
421                 }
422         }
423         set_memallocd(dev);
424         return 0;
425
426 isobufs_out:
427         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
428                 kfree(dev->isobufs[i].data);
429         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
430                 usb_free_urb(dev->isobufs[i].urb);
431         kfree(dev->isobufs);
432         dev->isobufs = NULL;
433         return -ENOMEM;
434 }
435
436 static void stk_clean_iso(struct stk_camera *dev)
437 {
438         int i;
439
440         if (dev == NULL || dev->isobufs == NULL)
441                 return;
442
443         for (i = 0; i < MAX_ISO_BUFS; i++) {
444                 struct urb *urb;
445
446                 urb = dev->isobufs[i].urb;
447                 if (urb) {
448                         if (atomic_read(&dev->urbs_used) && is_present(dev))
449                                 usb_kill_urb(urb);
450                         usb_free_urb(urb);
451                 }
452                 kfree(dev->isobufs[i].data);
453         }
454         kfree(dev->isobufs);
455         dev->isobufs = NULL;
456         unset_memallocd(dev);
457 }
458
459 static int stk_setup_siobuf(struct stk_camera *dev, int index)
460 {
461         struct stk_sio_buffer *buf = dev->sio_bufs + index;
462         INIT_LIST_HEAD(&buf->list);
463         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
464         buf->buffer = vmalloc_user(buf->v4lbuf.length);
465         if (buf->buffer == NULL)
466                 return -ENOMEM;
467         buf->mapcount = 0;
468         buf->dev = dev;
469         buf->v4lbuf.index = index;
470         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
471         buf->v4lbuf.field = V4L2_FIELD_NONE;
472         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
473         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
474         return 0;
475 }
476
477 static int stk_free_sio_buffers(struct stk_camera *dev)
478 {
479         int i;
480         int nbufs;
481         unsigned long flags;
482         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
483                 return 0;
484         /*
485         * If any buffers are mapped, we cannot free them at all.
486         */
487         for (i = 0; i < dev->n_sbufs; i++) {
488                 if (dev->sio_bufs[i].mapcount > 0)
489                         return -EBUSY;
490         }
491         /*
492         * OK, let's do it.
493         */
494         spin_lock_irqsave(&dev->spinlock, flags);
495         INIT_LIST_HEAD(&dev->sio_avail);
496         INIT_LIST_HEAD(&dev->sio_full);
497         nbufs = dev->n_sbufs;
498         dev->n_sbufs = 0;
499         spin_unlock_irqrestore(&dev->spinlock, flags);
500         for (i = 0; i < nbufs; i++) {
501                 if (dev->sio_bufs[i].buffer != NULL)
502                         vfree(dev->sio_bufs[i].buffer);
503         }
504         kfree(dev->sio_bufs);
505         dev->sio_bufs = NULL;
506         return 0;
507 }
508
509 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
510 {
511         int i;
512         if (dev->sio_bufs != NULL)
513                 STK_ERROR("sio_bufs already allocated\n");
514         else {
515                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
516                                 GFP_KERNEL);
517                 if (dev->sio_bufs == NULL)
518                         return -ENOMEM;
519                 for (i = 0; i < n_sbufs; i++) {
520                         if (stk_setup_siobuf(dev, i))
521                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
522                         dev->n_sbufs = i+1;
523                 }
524         }
525         return 0;
526 }
527
528 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
529 {
530         int err;
531         err = stk_prepare_iso(dev);
532         if (err) {
533                 stk_clean_iso(dev);
534                 return err;
535         }
536         err = stk_prepare_sio_buffers(dev, n_sbufs);
537         if (err) {
538                 stk_free_sio_buffers(dev);
539                 return err;
540         }
541         return 0;
542 }
543
544 static void stk_free_buffers(struct stk_camera *dev)
545 {
546         stk_clean_iso(dev);
547         stk_free_sio_buffers(dev);
548 }
549 /* -------------------------------------------- */
550
551 /* v4l file operations */
552
553 static int v4l_stk_open(struct file *fp)
554 {
555         struct stk_camera *dev;
556         struct video_device *vdev;
557
558         vdev = video_devdata(fp);
559         dev = vdev_to_camera(vdev);
560
561         if (dev == NULL || !is_present(dev)) {
562                 return -ENXIO;
563         }
564         fp->private_data = dev;
565         usb_autopm_get_interface(dev->interface);
566
567         return 0;
568 }
569
570 static int v4l_stk_release(struct file *fp)
571 {
572         struct stk_camera *dev = fp->private_data;
573
574         if (dev->owner == fp) {
575                 stk_stop_stream(dev);
576                 stk_free_buffers(dev);
577                 dev->owner = NULL;
578         }
579
580         if(is_present(dev))
581                 usb_autopm_put_interface(dev->interface);
582
583         return 0;
584 }
585
586 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
587                 size_t count, loff_t *f_pos)
588 {
589         int i;
590         int ret;
591         unsigned long flags;
592         struct stk_sio_buffer *sbuf;
593         struct stk_camera *dev = fp->private_data;
594
595         if (!is_present(dev))
596                 return -EIO;
597         if (dev->owner && dev->owner != fp)
598                 return -EBUSY;
599         dev->owner = fp;
600         if (!is_streaming(dev)) {
601                 if (stk_initialise(dev)
602                         || stk_allocate_buffers(dev, 3)
603                         || stk_start_stream(dev))
604                         return -ENOMEM;
605                 spin_lock_irqsave(&dev->spinlock, flags);
606                 for (i = 0; i < dev->n_sbufs; i++) {
607                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
608                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
609                 }
610                 spin_unlock_irqrestore(&dev->spinlock, flags);
611         }
612         if (*f_pos == 0) {
613                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
614                         return -EWOULDBLOCK;
615                 ret = wait_event_interruptible(dev->wait_frame,
616                         !list_empty(&dev->sio_full) || !is_present(dev));
617                 if (ret)
618                         return ret;
619                 if (!is_present(dev))
620                         return -EIO;
621         }
622         if (count + *f_pos > dev->frame_size)
623                 count = dev->frame_size - *f_pos;
624         spin_lock_irqsave(&dev->spinlock, flags);
625         if (list_empty(&dev->sio_full)) {
626                 spin_unlock_irqrestore(&dev->spinlock, flags);
627                 STK_ERROR("BUG: No siobufs ready\n");
628                 return 0;
629         }
630         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
631         spin_unlock_irqrestore(&dev->spinlock, flags);
632
633         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
634                 return -EFAULT;
635
636         *f_pos += count;
637
638         if (*f_pos >= dev->frame_size) {
639                 *f_pos = 0;
640                 spin_lock_irqsave(&dev->spinlock, flags);
641                 list_move_tail(&sbuf->list, &dev->sio_avail);
642                 spin_unlock_irqrestore(&dev->spinlock, flags);
643         }
644         return count;
645 }
646
647 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
648 {
649         struct stk_camera *dev = fp->private_data;
650
651         poll_wait(fp, &dev->wait_frame, wait);
652
653         if (!is_present(dev))
654                 return POLLERR;
655
656         if (!list_empty(&dev->sio_full))
657                 return (POLLIN | POLLRDNORM);
658
659         return 0;
660 }
661
662
663 static void stk_v4l_vm_open(struct vm_area_struct *vma)
664 {
665         struct stk_sio_buffer *sbuf = vma->vm_private_data;
666         sbuf->mapcount++;
667 }
668 static void stk_v4l_vm_close(struct vm_area_struct *vma)
669 {
670         struct stk_sio_buffer *sbuf = vma->vm_private_data;
671         sbuf->mapcount--;
672         if (sbuf->mapcount == 0)
673                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
674 }
675 static const struct vm_operations_struct stk_v4l_vm_ops = {
676         .open = stk_v4l_vm_open,
677         .close = stk_v4l_vm_close
678 };
679
680 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
681 {
682         unsigned int i;
683         int ret;
684         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
685         struct stk_camera *dev = fp->private_data;
686         struct stk_sio_buffer *sbuf = NULL;
687
688         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
689                 return -EINVAL;
690
691         for (i = 0; i < dev->n_sbufs; i++) {
692                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
693                         sbuf = dev->sio_bufs + i;
694                         break;
695                 }
696         }
697         if (sbuf == NULL)
698                 return -EINVAL;
699         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
700         if (ret)
701                 return ret;
702         vma->vm_flags |= VM_DONTEXPAND;
703         vma->vm_private_data = sbuf;
704         vma->vm_ops = &stk_v4l_vm_ops;
705         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
706         stk_v4l_vm_open(vma);
707         return 0;
708 }
709
710 /* v4l ioctl handlers */
711
712 static int stk_vidioc_querycap(struct file *filp,
713                 void *priv, struct v4l2_capability *cap)
714 {
715         strcpy(cap->driver, "stk");
716         strcpy(cap->card, "stk");
717         cap->version = DRIVER_VERSION_NUM;
718
719         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
720                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
721         return 0;
722 }
723
724 static int stk_vidioc_enum_input(struct file *filp,
725                 void *priv, struct v4l2_input *input)
726 {
727         if (input->index != 0)
728                 return -EINVAL;
729
730         strcpy(input->name, "Syntek USB Camera");
731         input->type = V4L2_INPUT_TYPE_CAMERA;
732         return 0;
733 }
734
735
736 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
737 {
738         *i = 0;
739         return 0;
740 }
741
742 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
743 {
744         if (i != 0)
745                 return -EINVAL;
746         else
747                 return 0;
748 }
749
750 /* from vivi.c */
751 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
752 {
753         return 0;
754 }
755
756 /* List of all V4Lv2 controls supported by the driver */
757 static struct v4l2_queryctrl stk_controls[] = {
758         {
759                 .id      = V4L2_CID_BRIGHTNESS,
760                 .type    = V4L2_CTRL_TYPE_INTEGER,
761                 .name    = "Brightness",
762                 .minimum = 0,
763                 .maximum = 0xffff,
764                 .step    = 0x0100,
765                 .default_value = 0x6000,
766         },
767         {
768                 .id      = V4L2_CID_HFLIP,
769                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
770                 .name    = "Horizontal Flip",
771                 .minimum = 0,
772                 .maximum = 1,
773                 .step    = 1,
774                 .default_value = 1,
775         },
776         {
777                 .id      = V4L2_CID_VFLIP,
778                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
779                 .name    = "Vertical Flip",
780                 .minimum = 0,
781                 .maximum = 1,
782                 .step    = 1,
783                 .default_value = 1,
784         },
785 };
786
787 static int stk_vidioc_queryctrl(struct file *filp,
788                 void *priv, struct v4l2_queryctrl *c)
789 {
790         int i;
791         int nbr;
792         nbr = ARRAY_SIZE(stk_controls);
793
794         for (i = 0; i < nbr; i++) {
795                 if (stk_controls[i].id == c->id) {
796                         memcpy(c, &stk_controls[i],
797                                 sizeof(struct v4l2_queryctrl));
798                         return 0;
799                 }
800         }
801         return -EINVAL;
802 }
803
804 static int stk_vidioc_g_ctrl(struct file *filp,
805                 void *priv, struct v4l2_control *c)
806 {
807         struct stk_camera *dev = priv;
808         switch (c->id) {
809         case V4L2_CID_BRIGHTNESS:
810                 c->value = dev->vsettings.brightness;
811                 break;
812         case V4L2_CID_HFLIP:
813                 c->value = dev->vsettings.hflip;
814                 break;
815         case V4L2_CID_VFLIP:
816                 c->value = dev->vsettings.vflip;
817                 break;
818         default:
819                 return -EINVAL;
820         }
821         return 0;
822 }
823
824 static int stk_vidioc_s_ctrl(struct file *filp,
825                 void *priv, struct v4l2_control *c)
826 {
827         struct stk_camera *dev = priv;
828         switch (c->id) {
829         case V4L2_CID_BRIGHTNESS:
830                 dev->vsettings.brightness = c->value;
831                 return stk_sensor_set_brightness(dev, c->value >> 8);
832         case V4L2_CID_HFLIP:
833                 dev->vsettings.hflip = c->value;
834                 return 0;
835         case V4L2_CID_VFLIP:
836                 dev->vsettings.vflip = c->value;
837                 return 0;
838         default:
839                 return -EINVAL;
840         }
841         return 0;
842 }
843
844
845 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
846                 void *priv, struct v4l2_fmtdesc *fmtd)
847 {
848         switch (fmtd->index) {
849         case 0:
850                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
851                 strcpy(fmtd->description, "r5g6b5");
852                 break;
853         case 1:
854                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
855                 strcpy(fmtd->description, "r5g6b5BE");
856                 break;
857         case 2:
858                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
859                 strcpy(fmtd->description, "yuv4:2:2");
860                 break;
861         case 3:
862                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
863                 strcpy(fmtd->description, "Raw bayer");
864                 break;
865         case 4:
866                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
867                 strcpy(fmtd->description, "yuv4:2:2");
868                 break;
869         default:
870                 return -EINVAL;
871         }
872         return 0;
873 }
874
875 static struct stk_size {
876         unsigned w;
877         unsigned h;
878         enum stk_mode m;
879 } stk_sizes[] = {
880         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
881         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
882         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
883         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
884         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
885 };
886
887 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
888                 void *priv, struct v4l2_format *f)
889 {
890         struct v4l2_pix_format *pix_format = &f->fmt.pix;
891         struct stk_camera *dev = priv;
892         int i;
893
894         for (i = 0; i < ARRAY_SIZE(stk_sizes)
895                         && stk_sizes[i].m != dev->vsettings.mode;
896                 i++);
897         if (i == ARRAY_SIZE(stk_sizes)) {
898                 STK_ERROR("ERROR: mode invalid\n");
899                 return -EINVAL;
900         }
901         pix_format->width = stk_sizes[i].w;
902         pix_format->height = stk_sizes[i].h;
903         pix_format->field = V4L2_FIELD_NONE;
904         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
905         pix_format->pixelformat = dev->vsettings.palette;
906         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
907                 pix_format->bytesperline = pix_format->width;
908         else
909                 pix_format->bytesperline = 2 * pix_format->width;
910         pix_format->sizeimage = pix_format->bytesperline
911                                 * pix_format->height;
912         return 0;
913 }
914
915 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
916                 void *priv, struct v4l2_format *fmtd)
917 {
918         int i;
919         switch (fmtd->fmt.pix.pixelformat) {
920         case V4L2_PIX_FMT_RGB565:
921         case V4L2_PIX_FMT_RGB565X:
922         case V4L2_PIX_FMT_UYVY:
923         case V4L2_PIX_FMT_YUYV:
924         case V4L2_PIX_FMT_SBGGR8:
925                 break;
926         default:
927                 return -EINVAL;
928         }
929         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
930                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
931                         break;
932         }
933         if (i == ARRAY_SIZE(stk_sizes)
934                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
935                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
936                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
937                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
938                 fmtd->fmt.pix.priv = i - 1;
939         } else {
940                 fmtd->fmt.pix.height = stk_sizes[i].h;
941                 fmtd->fmt.pix.width = stk_sizes[i].w;
942                 fmtd->fmt.pix.priv = i;
943         }
944
945         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
946         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
947         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
948                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
949         else
950                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
951         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
952                 * fmtd->fmt.pix.height;
953         return 0;
954 }
955
956 static int stk_setup_format(struct stk_camera *dev)
957 {
958         int i = 0;
959         int depth;
960         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
961                 depth = 1;
962         else
963                 depth = 2;
964         while (i < ARRAY_SIZE(stk_sizes) &&
965                         stk_sizes[i].m != dev->vsettings.mode)
966                 i++;
967         if (i == ARRAY_SIZE(stk_sizes)) {
968                 STK_ERROR("Something is broken in %s\n", __func__);
969                 return -EFAULT;
970         }
971         /* This registers controls some timings, not sure of what. */
972         stk_camera_write_reg(dev, 0x001b, 0x0e);
973         if (dev->vsettings.mode == MODE_SXGA)
974                 stk_camera_write_reg(dev, 0x001c, 0x0e);
975         else
976                 stk_camera_write_reg(dev, 0x001c, 0x46);
977         /*
978          * Registers 0x0115 0x0114 are the size of each line (bytes),
979          * regs 0x0117 0x0116 are the heigth of the image.
980          */
981         stk_camera_write_reg(dev, 0x0115,
982                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
983         stk_camera_write_reg(dev, 0x0114,
984                 (stk_sizes[i].w * depth) & 0xff);
985         stk_camera_write_reg(dev, 0x0117,
986                 (stk_sizes[i].h >> 8) & 0xff);
987         stk_camera_write_reg(dev, 0x0116,
988                 stk_sizes[i].h & 0xff);
989         return stk_sensor_configure(dev);
990 }
991
992 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
993                 void *priv, struct v4l2_format *fmtd)
994 {
995         int ret;
996         struct stk_camera *dev = priv;
997
998         if (dev == NULL)
999                 return -ENODEV;
1000         if (!is_present(dev))
1001                 return -ENODEV;
1002         if (is_streaming(dev))
1003                 return -EBUSY;
1004         if (dev->owner && dev->owner != filp)
1005                 return -EBUSY;
1006         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1007         if (ret)
1008                 return ret;
1009         dev->owner = filp;
1010
1011         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1012         stk_free_buffers(dev);
1013         dev->frame_size = fmtd->fmt.pix.sizeimage;
1014         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1015
1016         stk_initialise(dev);
1017         return stk_setup_format(dev);
1018 }
1019
1020 static int stk_vidioc_reqbufs(struct file *filp,
1021                 void *priv, struct v4l2_requestbuffers *rb)
1022 {
1023         struct stk_camera *dev = priv;
1024
1025         if (dev == NULL)
1026                 return -ENODEV;
1027         if (rb->memory != V4L2_MEMORY_MMAP)
1028                 return -EINVAL;
1029         if (is_streaming(dev)
1030                 || (dev->owner && dev->owner != filp))
1031                 return -EBUSY;
1032         dev->owner = filp;
1033
1034         /*FIXME If they ask for zero, we must stop streaming and free */
1035         if (rb->count < 3)
1036                 rb->count = 3;
1037         /* Arbitrary limit */
1038         else if (rb->count > 5)
1039                 rb->count = 5;
1040
1041         stk_allocate_buffers(dev, rb->count);
1042         rb->count = dev->n_sbufs;
1043         return 0;
1044 }
1045
1046 static int stk_vidioc_querybuf(struct file *filp,
1047                 void *priv, struct v4l2_buffer *buf)
1048 {
1049         struct stk_camera *dev = priv;
1050         struct stk_sio_buffer *sbuf;
1051
1052         if (buf->index >= dev->n_sbufs)
1053                 return -EINVAL;
1054         sbuf = dev->sio_bufs + buf->index;
1055         *buf = sbuf->v4lbuf;
1056         return 0;
1057 }
1058
1059 static int stk_vidioc_qbuf(struct file *filp,
1060                 void *priv, struct v4l2_buffer *buf)
1061 {
1062         struct stk_camera *dev = priv;
1063         struct stk_sio_buffer *sbuf;
1064         unsigned long flags;
1065
1066         if (buf->memory != V4L2_MEMORY_MMAP)
1067                 return -EINVAL;
1068
1069         if (buf->index >= dev->n_sbufs)
1070                 return -EINVAL;
1071         sbuf = dev->sio_bufs + buf->index;
1072         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1073                 return 0;
1074         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1075         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1076         spin_lock_irqsave(&dev->spinlock, flags);
1077         list_add_tail(&sbuf->list, &dev->sio_avail);
1078         *buf = sbuf->v4lbuf;
1079         spin_unlock_irqrestore(&dev->spinlock, flags);
1080         return 0;
1081 }
1082
1083 static int stk_vidioc_dqbuf(struct file *filp,
1084                 void *priv, struct v4l2_buffer *buf)
1085 {
1086         struct stk_camera *dev = priv;
1087         struct stk_sio_buffer *sbuf;
1088         unsigned long flags;
1089         int ret;
1090
1091         if (!is_streaming(dev))
1092                 return -EINVAL;
1093
1094         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1095                 return -EWOULDBLOCK;
1096         ret = wait_event_interruptible(dev->wait_frame,
1097                 !list_empty(&dev->sio_full) || !is_present(dev));
1098         if (ret)
1099                 return ret;
1100         if (!is_present(dev))
1101                 return -EIO;
1102
1103         spin_lock_irqsave(&dev->spinlock, flags);
1104         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1105         list_del_init(&sbuf->list);
1106         spin_unlock_irqrestore(&dev->spinlock, flags);
1107         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1108         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1109         sbuf->v4lbuf.sequence = ++dev->sequence;
1110         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1111
1112         *buf = sbuf->v4lbuf;
1113         return 0;
1114 }
1115
1116 static int stk_vidioc_streamon(struct file *filp,
1117                 void *priv, enum v4l2_buf_type type)
1118 {
1119         struct stk_camera *dev = priv;
1120         if (is_streaming(dev))
1121                 return 0;
1122         if (dev->sio_bufs == NULL)
1123                 return -EINVAL;
1124         dev->sequence = 0;
1125         return stk_start_stream(dev);
1126 }
1127
1128 static int stk_vidioc_streamoff(struct file *filp,
1129                 void *priv, enum v4l2_buf_type type)
1130 {
1131         struct stk_camera *dev = priv;
1132         unsigned long flags;
1133         int i;
1134         stk_stop_stream(dev);
1135         spin_lock_irqsave(&dev->spinlock, flags);
1136         INIT_LIST_HEAD(&dev->sio_avail);
1137         INIT_LIST_HEAD(&dev->sio_full);
1138         for (i = 0; i < dev->n_sbufs; i++) {
1139                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1140                 dev->sio_bufs[i].v4lbuf.flags = 0;
1141         }
1142         spin_unlock_irqrestore(&dev->spinlock, flags);
1143         return 0;
1144 }
1145
1146
1147 static int stk_vidioc_g_parm(struct file *filp,
1148                 void *priv, struct v4l2_streamparm *sp)
1149 {
1150         /*FIXME This is not correct */
1151         sp->parm.capture.timeperframe.numerator = 1;
1152         sp->parm.capture.timeperframe.denominator = 30;
1153         sp->parm.capture.readbuffers = 2;
1154         return 0;
1155 }
1156
1157 static int stk_vidioc_enum_framesizes(struct file *filp,
1158                 void *priv, struct v4l2_frmsizeenum *frms)
1159 {
1160         if (frms->index >= ARRAY_SIZE(stk_sizes))
1161                 return -EINVAL;
1162         switch (frms->pixel_format) {
1163         case V4L2_PIX_FMT_RGB565:
1164         case V4L2_PIX_FMT_RGB565X:
1165         case V4L2_PIX_FMT_UYVY:
1166         case V4L2_PIX_FMT_YUYV:
1167         case V4L2_PIX_FMT_SBGGR8:
1168                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1169                 frms->discrete.width = stk_sizes[frms->index].w;
1170                 frms->discrete.height = stk_sizes[frms->index].h;
1171                 return 0;
1172         default: return -EINVAL;
1173         }
1174 }
1175
1176 static struct v4l2_file_operations v4l_stk_fops = {
1177         .owner = THIS_MODULE,
1178         .open = v4l_stk_open,
1179         .release = v4l_stk_release,
1180         .read = v4l_stk_read,
1181         .poll = v4l_stk_poll,
1182         .mmap = v4l_stk_mmap,
1183         .ioctl = video_ioctl2,
1184 };
1185
1186 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1187         .vidioc_querycap = stk_vidioc_querycap,
1188         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1189         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1190         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1191         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1192         .vidioc_enum_input = stk_vidioc_enum_input,
1193         .vidioc_s_input = stk_vidioc_s_input,
1194         .vidioc_g_input = stk_vidioc_g_input,
1195         .vidioc_s_std = stk_vidioc_s_std,
1196         .vidioc_reqbufs = stk_vidioc_reqbufs,
1197         .vidioc_querybuf = stk_vidioc_querybuf,
1198         .vidioc_qbuf = stk_vidioc_qbuf,
1199         .vidioc_dqbuf = stk_vidioc_dqbuf,
1200         .vidioc_streamon = stk_vidioc_streamon,
1201         .vidioc_streamoff = stk_vidioc_streamoff,
1202         .vidioc_queryctrl = stk_vidioc_queryctrl,
1203         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1204         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1205         .vidioc_g_parm = stk_vidioc_g_parm,
1206         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1207 };
1208
1209 static void stk_v4l_dev_release(struct video_device *vd)
1210 {
1211         struct stk_camera *dev = vdev_to_camera(vd);
1212
1213         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1214                 STK_ERROR("We are leaking memory\n");
1215         usb_put_intf(dev->interface);
1216         kfree(dev);
1217 }
1218
1219 static struct video_device stk_v4l_data = {
1220         .name = "stkwebcam",
1221         .tvnorms = V4L2_STD_UNKNOWN,
1222         .current_norm = V4L2_STD_UNKNOWN,
1223         .fops = &v4l_stk_fops,
1224         .ioctl_ops = &v4l_stk_ioctl_ops,
1225         .release = stk_v4l_dev_release,
1226 };
1227
1228
1229 static int stk_register_video_device(struct stk_camera *dev)
1230 {
1231         int err;
1232
1233         dev->vdev = stk_v4l_data;
1234         dev->vdev.debug = debug;
1235         dev->vdev.parent = &dev->interface->dev;
1236         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1237         if (err)
1238                 STK_ERROR("v4l registration failed\n");
1239         else
1240                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1241                          video_device_node_name(&dev->vdev));
1242         return err;
1243 }
1244
1245
1246 /* USB Stuff */
1247
1248 static int stk_camera_probe(struct usb_interface *interface,
1249                 const struct usb_device_id *id)
1250 {
1251         int i;
1252         int err = 0;
1253
1254         struct stk_camera *dev = NULL;
1255         struct usb_device *udev = interface_to_usbdev(interface);
1256         struct usb_host_interface *iface_desc;
1257         struct usb_endpoint_descriptor *endpoint;
1258
1259         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1260         if (dev == NULL) {
1261                 STK_ERROR("Out of memory !\n");
1262                 return -ENOMEM;
1263         }
1264
1265         spin_lock_init(&dev->spinlock);
1266         init_waitqueue_head(&dev->wait_frame);
1267
1268         dev->udev = udev;
1269         dev->interface = interface;
1270         usb_get_intf(interface);
1271
1272         dev->vsettings.vflip = vflip;
1273         dev->vsettings.hflip = hflip;
1274         dev->n_sbufs = 0;
1275         set_present(dev);
1276
1277         /* Set up the endpoint information
1278          * use only the first isoc-in endpoint
1279          * for the current alternate setting */
1280         iface_desc = interface->cur_altsetting;
1281
1282         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1283                 endpoint = &iface_desc->endpoint[i].desc;
1284
1285                 if (!dev->isoc_ep
1286                         && usb_endpoint_is_isoc_in(endpoint)) {
1287                         /* we found an isoc in endpoint */
1288                         dev->isoc_ep = usb_endpoint_num(endpoint);
1289                         break;
1290                 }
1291         }
1292         if (!dev->isoc_ep) {
1293                 STK_ERROR("Could not find isoc-in endpoint");
1294                 err = -ENODEV;
1295                 goto error;
1296         }
1297         dev->vsettings.brightness = 0x7fff;
1298         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1299         dev->vsettings.mode = MODE_VGA;
1300         dev->frame_size = 640 * 480 * 2;
1301
1302         INIT_LIST_HEAD(&dev->sio_avail);
1303         INIT_LIST_HEAD(&dev->sio_full);
1304
1305         usb_set_intfdata(interface, dev);
1306
1307         err = stk_register_video_device(dev);
1308         if (err) {
1309                 goto error;
1310         }
1311
1312         return 0;
1313
1314 error:
1315         kfree(dev);
1316         return err;
1317 }
1318
1319 static void stk_camera_disconnect(struct usb_interface *interface)
1320 {
1321         struct stk_camera *dev = usb_get_intfdata(interface);
1322
1323         usb_set_intfdata(interface, NULL);
1324         unset_present(dev);
1325
1326         wake_up_interruptible(&dev->wait_frame);
1327
1328         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1329                  video_device_node_name(&dev->vdev));
1330
1331         video_unregister_device(&dev->vdev);
1332 }
1333
1334 #ifdef CONFIG_PM
1335 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1336 {
1337         struct stk_camera *dev = usb_get_intfdata(intf);
1338         if (is_streaming(dev)) {
1339                 stk_stop_stream(dev);
1340                 /* yes, this is ugly */
1341                 set_streaming(dev);
1342         }
1343         return 0;
1344 }
1345
1346 static int stk_camera_resume(struct usb_interface *intf)
1347 {
1348         struct stk_camera *dev = usb_get_intfdata(intf);
1349         if (!is_initialised(dev))
1350                 return 0;
1351         unset_initialised(dev);
1352         stk_initialise(dev);
1353         stk_setup_format(dev);
1354         if (is_streaming(dev))
1355                 stk_start_stream(dev);
1356         return 0;
1357 }
1358 #endif
1359
1360 static struct usb_driver stk_camera_driver = {
1361         .name = "stkwebcam",
1362         .probe = stk_camera_probe,
1363         .disconnect = stk_camera_disconnect,
1364         .id_table = stkwebcam_table,
1365 #ifdef CONFIG_PM
1366         .suspend = stk_camera_suspend,
1367         .resume = stk_camera_resume,
1368 #endif
1369 };
1370
1371
1372 static int __init stk_camera_init(void)
1373 {
1374         int result;
1375
1376         result = usb_register(&stk_camera_driver);
1377         if (result)
1378                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1379
1380
1381         return result;
1382 }
1383
1384 static void __exit stk_camera_exit(void)
1385 {
1386         usb_deregister(&stk_camera_driver);
1387 }
1388
1389 module_init(stk_camera_init);
1390 module_exit(stk_camera_exit);
1391
1392