V4L/DVB (12135): Add a driver for mt9v011 sensor
[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 #ifdef CONFIG_VIDEO_V4L1_COMPAT
234
235 /* sysfs functions */
236 /*FIXME cleanup this */
237
238 static ssize_t show_brightness(struct device *class,
239                         struct device_attribute *attr, char *buf)
240 {
241         struct video_device *vdev = to_video_device(class);
242         struct stk_camera *dev = vdev_to_camera(vdev);
243
244         return sprintf(buf, "%X\n", dev->vsettings.brightness);
245 }
246
247 static ssize_t store_brightness(struct device *class,
248                 struct device_attribute *attr, const char *buf, size_t count)
249 {
250         char *endp;
251         unsigned long value;
252         int ret;
253
254         struct video_device *vdev = to_video_device(class);
255         struct stk_camera *dev = vdev_to_camera(vdev);
256
257         value = simple_strtoul(buf, &endp, 16);
258
259         dev->vsettings.brightness = (int) value;
260
261         ret = stk_sensor_set_brightness(dev, value >> 8);
262         if (ret)
263                 return ret;
264         else
265                 return count;
266 }
267
268 static ssize_t show_hflip(struct device *class,
269                 struct device_attribute *attr, char *buf)
270 {
271         struct video_device *vdev = to_video_device(class);
272         struct stk_camera *dev = vdev_to_camera(vdev);
273
274         return sprintf(buf, "%d\n", dev->vsettings.hflip);
275 }
276
277 static ssize_t store_hflip(struct device *class,
278                 struct device_attribute *attr, const char *buf, size_t count)
279 {
280         struct video_device *vdev = to_video_device(class);
281         struct stk_camera *dev = vdev_to_camera(vdev);
282
283         if (strncmp(buf, "1", 1) == 0)
284                 dev->vsettings.hflip = 1;
285         else if (strncmp(buf, "0", 1) == 0)
286                 dev->vsettings.hflip = 0;
287         else
288                 return -EINVAL;
289
290         return strlen(buf);
291 }
292
293 static ssize_t show_vflip(struct device *class,
294                 struct device_attribute *attr, char *buf)
295 {
296         struct video_device *vdev = to_video_device(class);
297         struct stk_camera *dev = vdev_to_camera(vdev);
298
299         return sprintf(buf, "%d\n", dev->vsettings.vflip);
300 }
301
302 static ssize_t store_vflip(struct device *class,
303                 struct device_attribute *attr, const char *buf, size_t count)
304 {
305         struct video_device *vdev = to_video_device(class);
306         struct stk_camera *dev = vdev_to_camera(vdev);
307
308         if (strncmp(buf, "1", 1) == 0)
309                 dev->vsettings.vflip = 1;
310         else if (strncmp(buf, "0", 1) == 0)
311                 dev->vsettings.vflip = 0;
312         else
313                 return -EINVAL;
314
315         return strlen(buf);
316 }
317
318 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
319                         show_brightness, store_brightness);
320 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
321 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
322
323 static int stk_create_sysfs_files(struct video_device *vdev)
324 {
325         int ret;
326
327         ret = device_create_file(&vdev->dev, &dev_attr_brightness);
328         ret += device_create_file(&vdev->dev, &dev_attr_hflip);
329         ret += device_create_file(&vdev->dev, &dev_attr_vflip);
330         if (ret)
331                 STK_WARNING("Could not create sysfs files\n");
332         return ret;
333 }
334
335 static void stk_remove_sysfs_files(struct video_device *vdev)
336 {
337         device_remove_file(&vdev->dev, &dev_attr_brightness);
338         device_remove_file(&vdev->dev, &dev_attr_hflip);
339         device_remove_file(&vdev->dev, &dev_attr_vflip);
340 }
341
342 #else
343 #define stk_create_sysfs_files(a)
344 #define stk_remove_sysfs_files(a)
345 #endif
346
347 /* *********************************************** */
348 /*
349  * This function is called as an URB transfert is complete (Isochronous pipe).
350  * So, the traitement is done in interrupt time, so it has be fast, not crash,
351  * and not stall. Neat.
352  */
353 static void stk_isoc_handler(struct urb *urb)
354 {
355         int i;
356         int ret;
357         int framelen;
358         unsigned long flags;
359
360         unsigned char *fill = NULL;
361         unsigned char *iso_buf = NULL;
362
363         struct stk_camera *dev;
364         struct stk_sio_buffer *fb;
365
366         dev = (struct stk_camera *) urb->context;
367
368         if (dev == NULL) {
369                 STK_ERROR("isoc_handler called with NULL device !\n");
370                 return;
371         }
372
373         if (urb->status == -ENOENT || urb->status == -ECONNRESET
374                 || urb->status == -ESHUTDOWN) {
375                 atomic_dec(&dev->urbs_used);
376                 return;
377         }
378
379         spin_lock_irqsave(&dev->spinlock, flags);
380
381         if (urb->status != -EINPROGRESS && urb->status != 0) {
382                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
383                 goto resubmit;
384         }
385
386         if (list_empty(&dev->sio_avail)) {
387                 /*FIXME Stop streaming after a while */
388                 (void) (printk_ratelimit() &&
389                 STK_ERROR("isoc_handler without available buffer!\n"));
390                 goto resubmit;
391         }
392         fb = list_first_entry(&dev->sio_avail,
393                         struct stk_sio_buffer, list);
394         fill = fb->buffer + fb->v4lbuf.bytesused;
395
396         for (i = 0; i < urb->number_of_packets; i++) {
397                 if (urb->iso_frame_desc[i].status != 0) {
398                         if (urb->iso_frame_desc[i].status != -EXDEV)
399                                 STK_ERROR("Frame %d has error %d\n", i,
400                                         urb->iso_frame_desc[i].status);
401                         continue;
402                 }
403                 framelen = urb->iso_frame_desc[i].actual_length;
404                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
405
406                 if (framelen <= 4)
407                         continue; /* no data */
408
409                 /*
410                  * we found something informational from there
411                  * the isoc frames have to type of headers
412                  * type1: 00 xx 00 00 or 20 xx 00 00
413                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
414                  * xx is a sequencer which has never been seen over 0x3f
415                  * imho data written down looks like bayer, i see similarities
416                  * after every 640 bytes
417                  */
418                 if (*iso_buf & 0x80) {
419                         framelen -= 8;
420                         iso_buf += 8;
421                         /* This marks a new frame */
422                         if (fb->v4lbuf.bytesused != 0
423                                 && fb->v4lbuf.bytesused != dev->frame_size) {
424                                 (void) (printk_ratelimit() &&
425                                 STK_ERROR("frame %d, "
426                                         "bytesused=%d, skipping\n",
427                                         i, fb->v4lbuf.bytesused));
428                                 fb->v4lbuf.bytesused = 0;
429                                 fill = fb->buffer;
430                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
431                                 if (list_is_singular(&dev->sio_avail)) {
432                                         /* Always reuse the last buffer */
433                                         fb->v4lbuf.bytesused = 0;
434                                         fill = fb->buffer;
435                                 } else {
436                                         list_move_tail(dev->sio_avail.next,
437                                                 &dev->sio_full);
438                                         wake_up(&dev->wait_frame);
439                                         fb = list_first_entry(&dev->sio_avail,
440                                                 struct stk_sio_buffer, list);
441                                         fb->v4lbuf.bytesused = 0;
442                                         fill = fb->buffer;
443                                 }
444                         }
445                 } else {
446                         framelen -= 4;
447                         iso_buf += 4;
448                 }
449
450                 /* Our buffer is full !!! */
451                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
452                         (void) (printk_ratelimit() &&
453                         STK_ERROR("Frame buffer overflow, lost sync\n"));
454                         /*FIXME Do something here? */
455                         continue;
456                 }
457                 spin_unlock_irqrestore(&dev->spinlock, flags);
458                 memcpy(fill, iso_buf, framelen);
459                 spin_lock_irqsave(&dev->spinlock, flags);
460                 fill += framelen;
461
462                 /* New size of our buffer */
463                 fb->v4lbuf.bytesused += framelen;
464         }
465
466 resubmit:
467         spin_unlock_irqrestore(&dev->spinlock, flags);
468         urb->dev = dev->udev;
469         ret = usb_submit_urb(urb, GFP_ATOMIC);
470         if (ret != 0) {
471                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
472                         ret);
473         }
474 }
475
476 /* -------------------------------------------- */
477
478 static int stk_prepare_iso(struct stk_camera *dev)
479 {
480         void *kbuf;
481         int i, j;
482         struct urb *urb;
483         struct usb_device *udev;
484
485         if (dev == NULL)
486                 return -ENXIO;
487         udev = dev->udev;
488
489         if (dev->isobufs)
490                 STK_ERROR("isobufs already allocated. Bad\n");
491         else
492                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
493                                         GFP_KERNEL);
494         if (dev->isobufs == NULL) {
495                 STK_ERROR("Unable to allocate iso buffers\n");
496                 return -ENOMEM;
497         }
498         for (i = 0; i < MAX_ISO_BUFS; i++) {
499                 if (dev->isobufs[i].data == NULL) {
500                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
501                         if (kbuf == NULL) {
502                                 STK_ERROR("Failed to allocate iso buffer %d\n",
503                                         i);
504                                 goto isobufs_out;
505                         }
506                         dev->isobufs[i].data = kbuf;
507                 } else
508                         STK_ERROR("isobuf data already allocated\n");
509                 if (dev->isobufs[i].urb == NULL) {
510                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
511                         if (urb == NULL) {
512                                 STK_ERROR("Failed to allocate URB %d\n", i);
513                                 goto isobufs_out;
514                         }
515                         dev->isobufs[i].urb = urb;
516                 } else {
517                         STK_ERROR("Killing URB\n");
518                         usb_kill_urb(dev->isobufs[i].urb);
519                         urb = dev->isobufs[i].urb;
520                 }
521                 urb->interval = 1;
522                 urb->dev = udev;
523                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
524                 urb->transfer_flags = URB_ISO_ASAP;
525                 urb->transfer_buffer = dev->isobufs[i].data;
526                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
527                 urb->complete = stk_isoc_handler;
528                 urb->context = dev;
529                 urb->start_frame = 0;
530                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
531
532                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
533                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
534                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
535                 }
536         }
537         set_memallocd(dev);
538         return 0;
539
540 isobufs_out:
541         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
542                 kfree(dev->isobufs[i].data);
543         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
544                 usb_free_urb(dev->isobufs[i].urb);
545         kfree(dev->isobufs);
546         dev->isobufs = NULL;
547         return -ENOMEM;
548 }
549
550 static void stk_clean_iso(struct stk_camera *dev)
551 {
552         int i;
553
554         if (dev == NULL || dev->isobufs == NULL)
555                 return;
556
557         for (i = 0; i < MAX_ISO_BUFS; i++) {
558                 struct urb *urb;
559
560                 urb = dev->isobufs[i].urb;
561                 if (urb) {
562                         if (atomic_read(&dev->urbs_used) && is_present(dev))
563                                 usb_kill_urb(urb);
564                         usb_free_urb(urb);
565                 }
566                 kfree(dev->isobufs[i].data);
567         }
568         kfree(dev->isobufs);
569         dev->isobufs = NULL;
570         unset_memallocd(dev);
571 }
572
573 static int stk_setup_siobuf(struct stk_camera *dev, int index)
574 {
575         struct stk_sio_buffer *buf = dev->sio_bufs + index;
576         INIT_LIST_HEAD(&buf->list);
577         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
578         buf->buffer = vmalloc_user(buf->v4lbuf.length);
579         if (buf->buffer == NULL)
580                 return -ENOMEM;
581         buf->mapcount = 0;
582         buf->dev = dev;
583         buf->v4lbuf.index = index;
584         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
585         buf->v4lbuf.field = V4L2_FIELD_NONE;
586         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
587         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
588         return 0;
589 }
590
591 static int stk_free_sio_buffers(struct stk_camera *dev)
592 {
593         int i;
594         int nbufs;
595         unsigned long flags;
596         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
597                 return 0;
598         /*
599         * If any buffers are mapped, we cannot free them at all.
600         */
601         for (i = 0; i < dev->n_sbufs; i++) {
602                 if (dev->sio_bufs[i].mapcount > 0)
603                         return -EBUSY;
604         }
605         /*
606         * OK, let's do it.
607         */
608         spin_lock_irqsave(&dev->spinlock, flags);
609         INIT_LIST_HEAD(&dev->sio_avail);
610         INIT_LIST_HEAD(&dev->sio_full);
611         nbufs = dev->n_sbufs;
612         dev->n_sbufs = 0;
613         spin_unlock_irqrestore(&dev->spinlock, flags);
614         for (i = 0; i < nbufs; i++) {
615                 if (dev->sio_bufs[i].buffer != NULL)
616                         vfree(dev->sio_bufs[i].buffer);
617         }
618         kfree(dev->sio_bufs);
619         dev->sio_bufs = NULL;
620         return 0;
621 }
622
623 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
624 {
625         int i;
626         if (dev->sio_bufs != NULL)
627                 STK_ERROR("sio_bufs already allocated\n");
628         else {
629                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
630                                 GFP_KERNEL);
631                 if (dev->sio_bufs == NULL)
632                         return -ENOMEM;
633                 for (i = 0; i < n_sbufs; i++) {
634                         if (stk_setup_siobuf(dev, i))
635                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
636                         dev->n_sbufs = i+1;
637                 }
638         }
639         return 0;
640 }
641
642 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
643 {
644         int err;
645         err = stk_prepare_iso(dev);
646         if (err) {
647                 stk_clean_iso(dev);
648                 return err;
649         }
650         err = stk_prepare_sio_buffers(dev, n_sbufs);
651         if (err) {
652                 stk_free_sio_buffers(dev);
653                 return err;
654         }
655         return 0;
656 }
657
658 static void stk_free_buffers(struct stk_camera *dev)
659 {
660         stk_clean_iso(dev);
661         stk_free_sio_buffers(dev);
662 }
663 /* -------------------------------------------- */
664
665 /* v4l file operations */
666
667 static int v4l_stk_open(struct file *fp)
668 {
669         struct stk_camera *dev;
670         struct video_device *vdev;
671
672         vdev = video_devdata(fp);
673         dev = vdev_to_camera(vdev);
674
675         lock_kernel();
676         if (dev == NULL || !is_present(dev)) {
677                 unlock_kernel();
678                 return -ENXIO;
679         }
680         fp->private_data = dev;
681         usb_autopm_get_interface(dev->interface);
682         unlock_kernel();
683
684         return 0;
685 }
686
687 static int v4l_stk_release(struct file *fp)
688 {
689         struct stk_camera *dev = fp->private_data;
690
691         if (dev->owner == fp) {
692                 stk_stop_stream(dev);
693                 stk_free_buffers(dev);
694                 dev->owner = NULL;
695         }
696
697         if(is_present(dev))
698                 usb_autopm_put_interface(dev->interface);
699
700         return 0;
701 }
702
703 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
704                 size_t count, loff_t *f_pos)
705 {
706         int i;
707         int ret;
708         unsigned long flags;
709         struct stk_sio_buffer *sbuf;
710         struct stk_camera *dev = fp->private_data;
711
712         if (!is_present(dev))
713                 return -EIO;
714         if (dev->owner && dev->owner != fp)
715                 return -EBUSY;
716         dev->owner = fp;
717         if (!is_streaming(dev)) {
718                 if (stk_initialise(dev)
719                         || stk_allocate_buffers(dev, 3)
720                         || stk_start_stream(dev))
721                         return -ENOMEM;
722                 spin_lock_irqsave(&dev->spinlock, flags);
723                 for (i = 0; i < dev->n_sbufs; i++) {
724                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
725                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
726                 }
727                 spin_unlock_irqrestore(&dev->spinlock, flags);
728         }
729         if (*f_pos == 0) {
730                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
731                         return -EWOULDBLOCK;
732                 ret = wait_event_interruptible(dev->wait_frame,
733                         !list_empty(&dev->sio_full) || !is_present(dev));
734                 if (ret)
735                         return ret;
736                 if (!is_present(dev))
737                         return -EIO;
738         }
739         if (count + *f_pos > dev->frame_size)
740                 count = dev->frame_size - *f_pos;
741         spin_lock_irqsave(&dev->spinlock, flags);
742         if (list_empty(&dev->sio_full)) {
743                 spin_unlock_irqrestore(&dev->spinlock, flags);
744                 STK_ERROR("BUG: No siobufs ready\n");
745                 return 0;
746         }
747         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
748         spin_unlock_irqrestore(&dev->spinlock, flags);
749
750         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
751                 return -EFAULT;
752
753         *f_pos += count;
754
755         if (*f_pos >= dev->frame_size) {
756                 *f_pos = 0;
757                 spin_lock_irqsave(&dev->spinlock, flags);
758                 list_move_tail(&sbuf->list, &dev->sio_avail);
759                 spin_unlock_irqrestore(&dev->spinlock, flags);
760         }
761         return count;
762 }
763
764 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
765 {
766         struct stk_camera *dev = fp->private_data;
767
768         poll_wait(fp, &dev->wait_frame, wait);
769
770         if (!is_present(dev))
771                 return POLLERR;
772
773         if (!list_empty(&dev->sio_full))
774                 return (POLLIN | POLLRDNORM);
775
776         return 0;
777 }
778
779
780 static void stk_v4l_vm_open(struct vm_area_struct *vma)
781 {
782         struct stk_sio_buffer *sbuf = vma->vm_private_data;
783         sbuf->mapcount++;
784 }
785 static void stk_v4l_vm_close(struct vm_area_struct *vma)
786 {
787         struct stk_sio_buffer *sbuf = vma->vm_private_data;
788         sbuf->mapcount--;
789         if (sbuf->mapcount == 0)
790                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
791 }
792 static struct vm_operations_struct stk_v4l_vm_ops = {
793         .open = stk_v4l_vm_open,
794         .close = stk_v4l_vm_close
795 };
796
797 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
798 {
799         unsigned int i;
800         int ret;
801         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
802         struct stk_camera *dev = fp->private_data;
803         struct stk_sio_buffer *sbuf = NULL;
804
805         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
806                 return -EINVAL;
807
808         for (i = 0; i < dev->n_sbufs; i++) {
809                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
810                         sbuf = dev->sio_bufs + i;
811                         break;
812                 }
813         }
814         if (sbuf == NULL)
815                 return -EINVAL;
816         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
817         if (ret)
818                 return ret;
819         vma->vm_flags |= VM_DONTEXPAND;
820         vma->vm_private_data = sbuf;
821         vma->vm_ops = &stk_v4l_vm_ops;
822         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
823         stk_v4l_vm_open(vma);
824         return 0;
825 }
826
827 /* v4l ioctl handlers */
828
829 static int stk_vidioc_querycap(struct file *filp,
830                 void *priv, struct v4l2_capability *cap)
831 {
832         strcpy(cap->driver, "stk");
833         strcpy(cap->card, "stk");
834         cap->version = DRIVER_VERSION_NUM;
835
836         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
837                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
838         return 0;
839 }
840
841 static int stk_vidioc_enum_input(struct file *filp,
842                 void *priv, struct v4l2_input *input)
843 {
844         if (input->index != 0)
845                 return -EINVAL;
846
847         strcpy(input->name, "Syntek USB Camera");
848         input->type = V4L2_INPUT_TYPE_CAMERA;
849         return 0;
850 }
851
852
853 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
854 {
855         *i = 0;
856         return 0;
857 }
858
859 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
860 {
861         if (i != 0)
862                 return -EINVAL;
863         else
864                 return 0;
865 }
866
867 /* from vivi.c */
868 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
869 {
870         return 0;
871 }
872
873 /* List of all V4Lv2 controls supported by the driver */
874 static struct v4l2_queryctrl stk_controls[] = {
875         {
876                 .id      = V4L2_CID_BRIGHTNESS,
877                 .type    = V4L2_CTRL_TYPE_INTEGER,
878                 .name    = "Brightness",
879                 .minimum = 0,
880                 .maximum = 0xffff,
881                 .step    = 0x0100,
882                 .default_value = 0x6000,
883         },
884         /*TODO: get more controls to work */
885 };
886
887 static int stk_vidioc_queryctrl(struct file *filp,
888                 void *priv, struct v4l2_queryctrl *c)
889 {
890         int i;
891         int nbr;
892         nbr = ARRAY_SIZE(stk_controls);
893
894         for (i = 0; i < nbr; i++) {
895                 if (stk_controls[i].id == c->id) {
896                         memcpy(c, &stk_controls[i],
897                                 sizeof(struct v4l2_queryctrl));
898                         return 0;
899                 }
900         }
901         return -EINVAL;
902 }
903
904 static int stk_vidioc_g_ctrl(struct file *filp,
905                 void *priv, struct v4l2_control *c)
906 {
907         struct stk_camera *dev = priv;
908         switch (c->id) {
909         case V4L2_CID_BRIGHTNESS:
910                 c->value = dev->vsettings.brightness;
911                 break;
912         default:
913                 return -EINVAL;
914         }
915         return 0;
916 }
917
918 static int stk_vidioc_s_ctrl(struct file *filp,
919                 void *priv, struct v4l2_control *c)
920 {
921         struct stk_camera *dev = priv;
922         switch (c->id) {
923         case V4L2_CID_BRIGHTNESS:
924                 dev->vsettings.brightness = c->value;
925                 return stk_sensor_set_brightness(dev, c->value >> 8);
926         default:
927                 return -EINVAL;
928         }
929         return 0;
930 }
931
932
933 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
934                 void *priv, struct v4l2_fmtdesc *fmtd)
935 {
936         switch (fmtd->index) {
937         case 0:
938                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
939                 strcpy(fmtd->description, "r5g6b5");
940                 break;
941         case 1:
942                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
943                 strcpy(fmtd->description, "r5g6b5BE");
944                 break;
945         case 2:
946                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
947                 strcpy(fmtd->description, "yuv4:2:2");
948                 break;
949         case 3:
950                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
951                 strcpy(fmtd->description, "Raw bayer");
952                 break;
953         case 4:
954                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
955                 strcpy(fmtd->description, "yuv4:2:2");
956                 break;
957         default:
958                 return -EINVAL;
959         }
960         return 0;
961 }
962
963 static struct stk_size {
964         unsigned w;
965         unsigned h;
966         enum stk_mode m;
967 } stk_sizes[] = {
968         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
969         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
970         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
971         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
972         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
973 };
974
975 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
976                 void *priv, struct v4l2_format *f)
977 {
978         struct v4l2_pix_format *pix_format = &f->fmt.pix;
979         struct stk_camera *dev = priv;
980         int i;
981
982         for (i = 0; i < ARRAY_SIZE(stk_sizes)
983                         && stk_sizes[i].m != dev->vsettings.mode;
984                 i++);
985         if (i == ARRAY_SIZE(stk_sizes)) {
986                 STK_ERROR("ERROR: mode invalid\n");
987                 return -EINVAL;
988         }
989         pix_format->width = stk_sizes[i].w;
990         pix_format->height = stk_sizes[i].h;
991         pix_format->field = V4L2_FIELD_NONE;
992         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
993         pix_format->pixelformat = dev->vsettings.palette;
994         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
995                 pix_format->bytesperline = pix_format->width;
996         else
997                 pix_format->bytesperline = 2 * pix_format->width;
998         pix_format->sizeimage = pix_format->bytesperline
999                                 * pix_format->height;
1000         return 0;
1001 }
1002
1003 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1004                 void *priv, struct v4l2_format *fmtd)
1005 {
1006         int i;
1007         switch (fmtd->fmt.pix.pixelformat) {
1008         case V4L2_PIX_FMT_RGB565:
1009         case V4L2_PIX_FMT_RGB565X:
1010         case V4L2_PIX_FMT_UYVY:
1011         case V4L2_PIX_FMT_YUYV:
1012         case V4L2_PIX_FMT_SBGGR8:
1013                 break;
1014         default:
1015                 return -EINVAL;
1016         }
1017         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1018                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1019                         break;
1020         }
1021         if (i == ARRAY_SIZE(stk_sizes)
1022                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1023                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1024                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1025                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1026                 fmtd->fmt.pix.priv = i - 1;
1027         } else {
1028                 fmtd->fmt.pix.height = stk_sizes[i].h;
1029                 fmtd->fmt.pix.width = stk_sizes[i].w;
1030                 fmtd->fmt.pix.priv = i;
1031         }
1032
1033         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1034         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1035         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1036                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1037         else
1038                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1039         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1040                 * fmtd->fmt.pix.height;
1041         return 0;
1042 }
1043
1044 static int stk_setup_format(struct stk_camera *dev)
1045 {
1046         int i = 0;
1047         int depth;
1048         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1049                 depth = 1;
1050         else
1051                 depth = 2;
1052         while (stk_sizes[i].m != dev->vsettings.mode
1053                         && i < ARRAY_SIZE(stk_sizes))
1054                 i++;
1055         if (i == ARRAY_SIZE(stk_sizes)) {
1056                 STK_ERROR("Something is broken in %s\n", __func__);
1057                 return -EFAULT;
1058         }
1059         /* This registers controls some timings, not sure of what. */
1060         stk_camera_write_reg(dev, 0x001b, 0x0e);
1061         if (dev->vsettings.mode == MODE_SXGA)
1062                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1063         else
1064                 stk_camera_write_reg(dev, 0x001c, 0x46);
1065         /*
1066          * Registers 0x0115 0x0114 are the size of each line (bytes),
1067          * regs 0x0117 0x0116 are the heigth of the image.
1068          */
1069         stk_camera_write_reg(dev, 0x0115,
1070                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1071         stk_camera_write_reg(dev, 0x0114,
1072                 (stk_sizes[i].w * depth) & 0xff);
1073         stk_camera_write_reg(dev, 0x0117,
1074                 (stk_sizes[i].h >> 8) & 0xff);
1075         stk_camera_write_reg(dev, 0x0116,
1076                 stk_sizes[i].h & 0xff);
1077         return stk_sensor_configure(dev);
1078 }
1079
1080 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1081                 void *priv, struct v4l2_format *fmtd)
1082 {
1083         int ret;
1084         struct stk_camera *dev = priv;
1085
1086         if (dev == NULL)
1087                 return -ENODEV;
1088         if (!is_present(dev))
1089                 return -ENODEV;
1090         if (is_streaming(dev))
1091                 return -EBUSY;
1092         if (dev->owner && dev->owner != filp)
1093                 return -EBUSY;
1094         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1095         if (ret)
1096                 return ret;
1097         dev->owner = filp;
1098
1099         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1100         stk_free_buffers(dev);
1101         dev->frame_size = fmtd->fmt.pix.sizeimage;
1102         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1103
1104         stk_initialise(dev);
1105         return stk_setup_format(dev);
1106 }
1107
1108 static int stk_vidioc_reqbufs(struct file *filp,
1109                 void *priv, struct v4l2_requestbuffers *rb)
1110 {
1111         struct stk_camera *dev = priv;
1112
1113         if (dev == NULL)
1114                 return -ENODEV;
1115         if (rb->memory != V4L2_MEMORY_MMAP)
1116                 return -EINVAL;
1117         if (is_streaming(dev)
1118                 || (dev->owner && dev->owner != filp))
1119                 return -EBUSY;
1120         dev->owner = filp;
1121
1122         /*FIXME If they ask for zero, we must stop streaming and free */
1123         if (rb->count < 3)
1124                 rb->count = 3;
1125         /* Arbitrary limit */
1126         else if (rb->count > 5)
1127                 rb->count = 5;
1128
1129         stk_allocate_buffers(dev, rb->count);
1130         rb->count = dev->n_sbufs;
1131         return 0;
1132 }
1133
1134 static int stk_vidioc_querybuf(struct file *filp,
1135                 void *priv, struct v4l2_buffer *buf)
1136 {
1137         struct stk_camera *dev = priv;
1138         struct stk_sio_buffer *sbuf;
1139
1140         if (buf->index >= dev->n_sbufs)
1141                 return -EINVAL;
1142         sbuf = dev->sio_bufs + buf->index;
1143         *buf = sbuf->v4lbuf;
1144         return 0;
1145 }
1146
1147 static int stk_vidioc_qbuf(struct file *filp,
1148                 void *priv, struct v4l2_buffer *buf)
1149 {
1150         struct stk_camera *dev = priv;
1151         struct stk_sio_buffer *sbuf;
1152         unsigned long flags;
1153
1154         if (buf->memory != V4L2_MEMORY_MMAP)
1155                 return -EINVAL;
1156
1157         if (buf->index >= dev->n_sbufs)
1158                 return -EINVAL;
1159         sbuf = dev->sio_bufs + buf->index;
1160         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1161                 return 0;
1162         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1163         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1164         spin_lock_irqsave(&dev->spinlock, flags);
1165         list_add_tail(&sbuf->list, &dev->sio_avail);
1166         *buf = sbuf->v4lbuf;
1167         spin_unlock_irqrestore(&dev->spinlock, flags);
1168         return 0;
1169 }
1170
1171 static int stk_vidioc_dqbuf(struct file *filp,
1172                 void *priv, struct v4l2_buffer *buf)
1173 {
1174         struct stk_camera *dev = priv;
1175         struct stk_sio_buffer *sbuf;
1176         unsigned long flags;
1177         int ret;
1178
1179         if (!is_streaming(dev))
1180                 return -EINVAL;
1181
1182         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1183                 return -EWOULDBLOCK;
1184         ret = wait_event_interruptible(dev->wait_frame,
1185                 !list_empty(&dev->sio_full) || !is_present(dev));
1186         if (ret)
1187                 return ret;
1188         if (!is_present(dev))
1189                 return -EIO;
1190
1191         spin_lock_irqsave(&dev->spinlock, flags);
1192         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1193         list_del_init(&sbuf->list);
1194         spin_unlock_irqrestore(&dev->spinlock, flags);
1195         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1196         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1197         sbuf->v4lbuf.sequence = ++dev->sequence;
1198         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1199
1200         *buf = sbuf->v4lbuf;
1201         return 0;
1202 }
1203
1204 static int stk_vidioc_streamon(struct file *filp,
1205                 void *priv, enum v4l2_buf_type type)
1206 {
1207         struct stk_camera *dev = priv;
1208         if (is_streaming(dev))
1209                 return 0;
1210         if (dev->sio_bufs == NULL)
1211                 return -EINVAL;
1212         dev->sequence = 0;
1213         return stk_start_stream(dev);
1214 }
1215
1216 static int stk_vidioc_streamoff(struct file *filp,
1217                 void *priv, enum v4l2_buf_type type)
1218 {
1219         struct stk_camera *dev = priv;
1220         unsigned long flags;
1221         int i;
1222         stk_stop_stream(dev);
1223         spin_lock_irqsave(&dev->spinlock, flags);
1224         INIT_LIST_HEAD(&dev->sio_avail);
1225         INIT_LIST_HEAD(&dev->sio_full);
1226         for (i = 0; i < dev->n_sbufs; i++) {
1227                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1228                 dev->sio_bufs[i].v4lbuf.flags = 0;
1229         }
1230         spin_unlock_irqrestore(&dev->spinlock, flags);
1231         return 0;
1232 }
1233
1234
1235 static int stk_vidioc_g_parm(struct file *filp,
1236                 void *priv, struct v4l2_streamparm *sp)
1237 {
1238         /*FIXME This is not correct */
1239         sp->parm.capture.timeperframe.numerator = 1;
1240         sp->parm.capture.timeperframe.denominator = 30;
1241         sp->parm.capture.readbuffers = 2;
1242         return 0;
1243 }
1244
1245 static int stk_vidioc_enum_framesizes(struct file *filp,
1246                 void *priv, struct v4l2_frmsizeenum *frms)
1247 {
1248         if (frms->index >= ARRAY_SIZE(stk_sizes))
1249                 return -EINVAL;
1250         switch (frms->pixel_format) {
1251         case V4L2_PIX_FMT_RGB565:
1252         case V4L2_PIX_FMT_RGB565X:
1253         case V4L2_PIX_FMT_UYVY:
1254         case V4L2_PIX_FMT_YUYV:
1255         case V4L2_PIX_FMT_SBGGR8:
1256                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1257                 frms->discrete.width = stk_sizes[frms->index].w;
1258                 frms->discrete.height = stk_sizes[frms->index].h;
1259                 return 0;
1260         default: return -EINVAL;
1261         }
1262 }
1263
1264 static struct v4l2_file_operations v4l_stk_fops = {
1265         .owner = THIS_MODULE,
1266         .open = v4l_stk_open,
1267         .release = v4l_stk_release,
1268         .read = v4l_stk_read,
1269         .poll = v4l_stk_poll,
1270         .mmap = v4l_stk_mmap,
1271         .ioctl = video_ioctl2,
1272 };
1273
1274 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1275         .vidioc_querycap = stk_vidioc_querycap,
1276         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1277         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1278         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1279         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1280         .vidioc_enum_input = stk_vidioc_enum_input,
1281         .vidioc_s_input = stk_vidioc_s_input,
1282         .vidioc_g_input = stk_vidioc_g_input,
1283         .vidioc_s_std = stk_vidioc_s_std,
1284         .vidioc_reqbufs = stk_vidioc_reqbufs,
1285         .vidioc_querybuf = stk_vidioc_querybuf,
1286         .vidioc_qbuf = stk_vidioc_qbuf,
1287         .vidioc_dqbuf = stk_vidioc_dqbuf,
1288         .vidioc_streamon = stk_vidioc_streamon,
1289         .vidioc_streamoff = stk_vidioc_streamoff,
1290         .vidioc_queryctrl = stk_vidioc_queryctrl,
1291         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1292         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1293         .vidioc_g_parm = stk_vidioc_g_parm,
1294         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1295 };
1296
1297 static void stk_v4l_dev_release(struct video_device *vd)
1298 {
1299         struct stk_camera *dev = vdev_to_camera(vd);
1300
1301         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1302                 STK_ERROR("We are leaking memory\n");
1303         usb_put_intf(dev->interface);
1304         kfree(dev);
1305 }
1306
1307 static struct video_device stk_v4l_data = {
1308         .name = "stkwebcam",
1309         .minor = -1,
1310         .tvnorms = V4L2_STD_UNKNOWN,
1311         .current_norm = V4L2_STD_UNKNOWN,
1312         .fops = &v4l_stk_fops,
1313         .ioctl_ops = &v4l_stk_ioctl_ops,
1314         .release = stk_v4l_dev_release,
1315 };
1316
1317
1318 static int stk_register_video_device(struct stk_camera *dev)
1319 {
1320         int err;
1321
1322         dev->vdev = stk_v4l_data;
1323         dev->vdev.debug = debug;
1324         dev->vdev.parent = &dev->interface->dev;
1325         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1326         if (err)
1327                 STK_ERROR("v4l registration failed\n");
1328         else
1329                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1330                         " /dev/video%d\n", dev->vdev.num);
1331         return err;
1332 }
1333
1334
1335 /* USB Stuff */
1336
1337 static int stk_camera_probe(struct usb_interface *interface,
1338                 const struct usb_device_id *id)
1339 {
1340         int i;
1341         int err = 0;
1342
1343         struct stk_camera *dev = NULL;
1344         struct usb_device *udev = interface_to_usbdev(interface);
1345         struct usb_host_interface *iface_desc;
1346         struct usb_endpoint_descriptor *endpoint;
1347
1348         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1349         if (dev == NULL) {
1350                 STK_ERROR("Out of memory !\n");
1351                 return -ENOMEM;
1352         }
1353
1354         spin_lock_init(&dev->spinlock);
1355         init_waitqueue_head(&dev->wait_frame);
1356
1357         dev->udev = udev;
1358         dev->interface = interface;
1359         usb_get_intf(interface);
1360
1361         dev->vsettings.vflip = vflip;
1362         dev->vsettings.hflip = hflip;
1363         dev->n_sbufs = 0;
1364         set_present(dev);
1365
1366         /* Set up the endpoint information
1367          * use only the first isoc-in endpoint
1368          * for the current alternate setting */
1369         iface_desc = interface->cur_altsetting;
1370
1371         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1372                 endpoint = &iface_desc->endpoint[i].desc;
1373
1374                 if (!dev->isoc_ep
1375                         && usb_endpoint_is_isoc_in(endpoint)) {
1376                         /* we found an isoc in endpoint */
1377                         dev->isoc_ep = usb_endpoint_num(endpoint);
1378                         break;
1379                 }
1380         }
1381         if (!dev->isoc_ep) {
1382                 STK_ERROR("Could not find isoc-in endpoint");
1383                 err = -ENODEV;
1384                 goto error;
1385         }
1386         dev->vsettings.brightness = 0x7fff;
1387         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1388         dev->vsettings.mode = MODE_VGA;
1389         dev->frame_size = 640 * 480 * 2;
1390
1391         INIT_LIST_HEAD(&dev->sio_avail);
1392         INIT_LIST_HEAD(&dev->sio_full);
1393
1394         usb_set_intfdata(interface, dev);
1395
1396         err = stk_register_video_device(dev);
1397         if (err) {
1398                 goto error;
1399         }
1400
1401         stk_create_sysfs_files(&dev->vdev);
1402         usb_autopm_enable(dev->interface);
1403
1404         return 0;
1405
1406 error:
1407         kfree(dev);
1408         return err;
1409 }
1410
1411 static void stk_camera_disconnect(struct usb_interface *interface)
1412 {
1413         struct stk_camera *dev = usb_get_intfdata(interface);
1414
1415         usb_set_intfdata(interface, NULL);
1416         unset_present(dev);
1417
1418         wake_up_interruptible(&dev->wait_frame);
1419         stk_remove_sysfs_files(&dev->vdev);
1420
1421         STK_INFO("Syntek USB2.0 Camera release resources "
1422                 "video device /dev/video%d\n", dev->vdev.num);
1423
1424         video_unregister_device(&dev->vdev);
1425 }
1426
1427 #ifdef CONFIG_PM
1428 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1429 {
1430         struct stk_camera *dev = usb_get_intfdata(intf);
1431         if (is_streaming(dev)) {
1432                 stk_stop_stream(dev);
1433                 /* yes, this is ugly */
1434                 set_streaming(dev);
1435         }
1436         return 0;
1437 }
1438
1439 static int stk_camera_resume(struct usb_interface *intf)
1440 {
1441         struct stk_camera *dev = usb_get_intfdata(intf);
1442         if (!is_initialised(dev))
1443                 return 0;
1444         unset_initialised(dev);
1445         stk_initialise(dev);
1446         stk_setup_format(dev);
1447         if (is_streaming(dev))
1448                 stk_start_stream(dev);
1449         return 0;
1450 }
1451 #endif
1452
1453 static struct usb_driver stk_camera_driver = {
1454         .name = "stkwebcam",
1455         .probe = stk_camera_probe,
1456         .disconnect = stk_camera_disconnect,
1457         .id_table = stkwebcam_table,
1458 #ifdef CONFIG_PM
1459         .suspend = stk_camera_suspend,
1460         .resume = stk_camera_resume,
1461 #endif
1462 };
1463
1464
1465 static int __init stk_camera_init(void)
1466 {
1467         int result;
1468
1469         result = usb_register(&stk_camera_driver);
1470         if (result)
1471                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1472
1473
1474         return result;
1475 }
1476
1477 static void __exit stk_camera_exit(void)
1478 {
1479         usb_deregister(&stk_camera_driver);
1480 }
1481
1482 module_init(stk_camera_init);
1483 module_exit(stk_camera_exit);
1484
1485