?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlwifi: introduce host commands callbacks
[linux/fpc-iii.git] / drivers / media / video / stk-webcam.c
blobceba45ad02942622edd1c67f8aecb9d65306c1e7
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 #include <linux/kref.h>
31
32 #include <linux/usb.h>
33 #include <linux/vmalloc.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-common.h>
36
37 #include "stk-webcam.h"
38
39
40 static int hflip = 1;
41 module_param(hflip, bool, 0444);
42 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
43
44 static int vflip = 1;
45 module_param(vflip, bool, 0444);
46 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
47
48 static int debug;
49 module_param(debug, int, 0444);
50 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
51
52 MODULE_LICENSE("GPL");
53 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
54 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
55
56
57
58 /* Some cameras have audio interfaces, we aren't interested in those */
59 static struct usb_device_id stkwebcam_table[] = {
60 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
61 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
62 { }
63 };
64 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
65
66 static void stk_camera_cleanup(struct kref *kref)
67 {
68 struct stk_camera *dev = to_stk_camera(kref);
69
70 STK_INFO("Syntek USB2.0 Camera release resources"
71 " video device /dev/video%d\n", dev->vdev.minor);
72 video_unregister_device(&dev->vdev);
73 dev->vdev.priv = NULL;
74
75 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
76 STK_ERROR("We are leaking memory\n");
77 usb_put_intf(dev->interface);
78 kfree(dev);
79 }
80
81
82 /*
83 * Basic stuff
84 */
85 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
86 {
87 struct usb_device *udev = dev->udev;
88 int ret;
89
90 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
91 0x01,
92 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
93 value,
94 index,
95 NULL,
96 0,
97 500);
98 if (ret < 0)
99 return ret;
100 else
101 return 0;
102 }
103
104 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
105 {
106 struct usb_device *udev = dev->udev;
107 int ret;
108
109 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
110 0x00,
111 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
112 0x00,
113 index,
114 (u8 *) value,
115 sizeof(u8),
116 500);
117 if (ret < 0)
118 return ret;
119 else
120 return 0;
121 }
122
123 static int stk_start_stream(struct stk_camera *dev)
124 {
125 int value;
126 int i, ret;
127 int value_116, value_117;
128
129 if (!is_present(dev))
130 return -ENODEV;
131 if (!is_memallocd(dev) || !is_initialised(dev)) {
132 STK_ERROR("FIXME: Buffers are not allocated\n");
133 return -EFAULT;
134 }
135 ret = usb_set_interface(dev->udev, 0, 5);
136
137 if (ret < 0)
138 STK_ERROR("usb_set_interface failed !\n");
139 if (stk_sensor_wakeup(dev))
140 STK_ERROR("error awaking the sensor\n");
141
142 stk_camera_read_reg(dev, 0x0116, &value_116);
143 stk_camera_read_reg(dev, 0x0117, &value_117);
144
145 stk_camera_write_reg(dev, 0x0116, 0x0000);
146 stk_camera_write_reg(dev, 0x0117, 0x0000);
147
148 stk_camera_read_reg(dev, 0x0100, &value);
149 stk_camera_write_reg(dev, 0x0100, value | 0x80);
150
151 stk_camera_write_reg(dev, 0x0116, value_116);
152 stk_camera_write_reg(dev, 0x0117, value_117);
153 for (i = 0; i < MAX_ISO_BUFS; i++) {
154 if (dev->isobufs[i].urb) {
155 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
156 atomic_inc(&dev->urbs_used);
157 if (ret)
158 return ret;
159 }
160 }
161 set_streaming(dev);
162 return 0;
163 }
164
165 static int stk_stop_stream(struct stk_camera *dev)
166 {
167 int value;
168 int i;
169 if (is_present(dev)) {
170 stk_camera_read_reg(dev, 0x0100, &value);
171 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
172 if (dev->isobufs != NULL) {
173 for (i = 0; i < MAX_ISO_BUFS; i++) {
174 if (dev->isobufs[i].urb)
175 usb_kill_urb(dev->isobufs[i].urb);
176 }
177 }
178 unset_streaming(dev);
179
180 if (usb_set_interface(dev->udev, 0, 0))
181 STK_ERROR("usb_set_interface failed !\n");
182 if (stk_sensor_sleep(dev))
183 STK_ERROR("error suspending the sensor\n");
184 }
185 return 0;
186 }
187
188 /*
189 * This seems to be the shortest init sequence we
190 * must do in order to find the sensor
191 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
192 * is also reset. Maybe powers down it?
193 * Rest of values don't make a difference
194 */
195
196 static struct regval stk1125_initvals[] = {
197 /*TODO: What means this sequence? */
198 {0x0000, 0x24},
199 {0x0100, 0x21},
200 {0x0002, 0x68},
201 {0x0003, 0x80},
202 {0x0005, 0x00},
203 {0x0007, 0x03},
204 {0x000d, 0x00},
205 {0x000f, 0x02},
206 {0x0300, 0x12},
207 {0x0350, 0x41},
208 {0x0351, 0x00},
209 {0x0352, 0x00},
210 {0x0353, 0x00},
211 {0x0018, 0x10},
212 {0x0019, 0x00},
213 {0x001b, 0x0e},
214 {0x001c, 0x46},
215 {0x0300, 0x80},
216 {0x001a, 0x04},
217 {0x0110, 0x00},
218 {0x0111, 0x00},
219 {0x0112, 0x00},
220 {0x0113, 0x00},
221
222 {0xffff, 0xff},
223 };
224
225
226 static int stk_initialise(struct stk_camera *dev)
227 {
228 struct regval *rv;
229 int ret;
230 if (!is_present(dev))
231 return -ENODEV;
232 if (is_initialised(dev))
233 return 0;
234 rv = stk1125_initvals;
235 while (rv->reg != 0xffff) {
236 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
237 if (ret)
238 return ret;
239 rv++;
240 }
241 if (stk_sensor_init(dev) == 0) {
242 set_initialised(dev);
243 return 0;
244 } else
245 return -1;
246 }
247
248 /* sysfs functions */
249 /*FIXME cleanup this */
250
251 static ssize_t show_brightness(struct device *class,
252 struct device_attribute *attr, char *buf)
253 {
254 struct video_device *vdev = to_video_device(class);
255 struct stk_camera *dev = vdev_to_camera(vdev);
256
257 return sprintf(buf, "%X\n", dev->vsettings.brightness);
258 }
259
260 static ssize_t store_brightness(struct device *class,
261 struct device_attribute *attr, const char *buf, size_t count)
262 {
263 char *endp;
264 unsigned long value;
265 int ret;
266
267 struct video_device *vdev = to_video_device(class);
268 struct stk_camera *dev = vdev_to_camera(vdev);
269
270 value = simple_strtoul(buf, &endp, 16);
271
272 dev->vsettings.brightness = (int) value;
273
274 ret = stk_sensor_set_brightness(dev, value >> 8);
275 if (ret)
276 return ret;
277 else
278 return count;
279 }
280
281 static ssize_t show_hflip(struct device *class,
282 struct device_attribute *attr, char *buf)
283 {
284 struct video_device *vdev = to_video_device(class);
285 struct stk_camera *dev = vdev_to_camera(vdev);
286
287 return sprintf(buf, "%d\n", dev->vsettings.hflip);
288 }
289
290 static ssize_t store_hflip(struct device *class,
291 struct device_attribute *attr, const char *buf, size_t count)
292 {
293 struct video_device *vdev = to_video_device(class);
294 struct stk_camera *dev = vdev_to_camera(vdev);
295
296 if (strncmp(buf, "1", 1) == 0)
297 dev->vsettings.hflip = 1;
298 else if (strncmp(buf, "0", 1) == 0)
299 dev->vsettings.hflip = 0;
300 else
301 return -EINVAL;
302
303 return strlen(buf);
304 }
305
306 static ssize_t show_vflip(struct device *class,
307 struct device_attribute *attr, char *buf)
308 {
309 struct video_device *vdev = to_video_device(class);
310 struct stk_camera *dev = vdev_to_camera(vdev);
311
312 return sprintf(buf, "%d\n", dev->vsettings.vflip);
313 }
314
315 static ssize_t store_vflip(struct device *class,
316 struct device_attribute *attr, const char *buf, size_t count)
317 {
318 struct video_device *vdev = to_video_device(class);
319 struct stk_camera *dev = vdev_to_camera(vdev);
320
321 if (strncmp(buf, "1", 1) == 0)
322 dev->vsettings.vflip = 1;
323 else if (strncmp(buf, "0", 1) == 0)
324 dev->vsettings.vflip = 0;
325 else
326 return -EINVAL;
327
328 return strlen(buf);
329 }
330
331 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
332 show_brightness, store_brightness);
333 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
334 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
335
336 static int stk_create_sysfs_files(struct video_device *vdev)
337 {
338 int ret;
339
340 ret = video_device_create_file(vdev, &dev_attr_brightness);
341 ret += video_device_create_file(vdev, &dev_attr_hflip);
342 ret += video_device_create_file(vdev, &dev_attr_vflip);
343 return ret;
344 }
345
346 static void stk_remove_sysfs_files(struct video_device *vdev)
347 {
348 video_device_remove_file(vdev, &dev_attr_brightness);
349 video_device_remove_file(vdev, &dev_attr_hflip);
350 video_device_remove_file(vdev, &dev_attr_vflip);
351 }
352
353
354 /* *********************************************** */
355 /*
356 * This function is called as an URB transfert is complete (Isochronous pipe).
357 * So, the traitement is done in interrupt time, so it has be fast, not crash,
358 * and not stall. Neat.
359 */
360 static void stk_isoc_handler(struct urb *urb)
361 {
362 int i;
363 int ret;
364 int framelen;
365 unsigned long flags;
366
367 unsigned char *fill = NULL;
368 unsigned char *iso_buf = NULL;
369
370 struct stk_camera *dev;
371 struct stk_sio_buffer *fb;
372
373 dev = (struct stk_camera *) urb->context;
374
375 if (dev == NULL) {
376 STK_ERROR("isoc_handler called with NULL device !\n");
377 return;
378 }
379
380 if (urb->status == -ENOENT || urb->status == -ECONNRESET
381 || urb->status == -ESHUTDOWN) {
382 atomic_dec(&dev->urbs_used);
383 return;
384 }
385
386 spin_lock_irqsave(&dev->spinlock, flags);
387
388 if (urb->status != -EINPROGRESS && urb->status != 0) {
389 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
390 goto resubmit;
391 }
392
393 if (list_empty(&dev->sio_avail)) {
394 /*FIXME Stop streaming after a while */
395 (void) (printk_ratelimit() &&
396 STK_ERROR("isoc_handler without available buffer!\n"));
397 goto resubmit;
398 }
399 fb = list_first_entry(&dev->sio_avail,
400 struct stk_sio_buffer, list);
401 fill = fb->buffer + fb->v4lbuf.bytesused;
402
403 for (i = 0; i < urb->number_of_packets; i++) {
404 if (urb->iso_frame_desc[i].status != 0) {
405 if (urb->iso_frame_desc[i].status != -EXDEV)
406 STK_ERROR("Frame %d has error %d\n", i,
407 urb->iso_frame_desc[i].status);
408 continue;
409 }
410 framelen = urb->iso_frame_desc[i].actual_length;
411 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
412
413 if (framelen <= 4)
414 continue; /* no data */
415
416 /*
417 * we found something informational from there
418 * the isoc frames have to type of headers
419 * type1: 00 xx 00 00 or 20 xx 00 00
420 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
421 * xx is a sequencer which has never been seen over 0x3f
422 * imho data written down looks like bayer, i see similarities
423 * after every 640 bytes
424 */
425 if (*iso_buf & 0x80) {
426 framelen -= 8;
427 iso_buf += 8;
428 /* This marks a new frame */
429 if (fb->v4lbuf.bytesused != 0
430 && fb->v4lbuf.bytesused != dev->frame_size) {
431 (void) (printk_ratelimit() &&
432 STK_ERROR("frame %d, "
433 "bytesused=%d, skipping\n",
434 i, fb->v4lbuf.bytesused));
435 fb->v4lbuf.bytesused = 0;
436 fill = fb->buffer;
437 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
438 list_move_tail(dev->sio_avail.next,
439 &dev->sio_full);
440 wake_up(&dev->wait_frame);
441 if (list_empty(&dev->sio_avail)) {
442 (void) (printk_ratelimit() &&
443 STK_ERROR("No buffer available\n"));
444 goto resubmit;
445 }
446 fb = list_first_entry(&dev->sio_avail,
447 struct stk_sio_buffer, list);
448 fb->v4lbuf.bytesused = 0;
449 fill = fb->buffer;
450 }
451 } else {
452 framelen -= 4;
453 iso_buf += 4;
454 }
455
456 /* Our buffer is full !!! */
457 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
458 (void) (printk_ratelimit() &&
459 STK_ERROR("Frame buffer overflow, lost sync\n"));
460 /*FIXME Do something here? */
461 continue;
462 }
463 spin_unlock_irqrestore(&dev->spinlock, flags);
464 memcpy(fill, iso_buf, framelen);
465 spin_lock_irqsave(&dev->spinlock, flags);
466 fill += framelen;
467
468 /* New size of our buffer */
469 fb->v4lbuf.bytesused += framelen;
470 }
471
472 resubmit:
473 spin_unlock_irqrestore(&dev->spinlock, flags);
474 urb->dev = dev->udev;
475 ret = usb_submit_urb(urb, GFP_ATOMIC);
476 if (ret != 0) {
477 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
478 ret);
479 }
480 }
481
482 /* -------------------------------------------- */
483
484 static int stk_prepare_iso(struct stk_camera *dev)
485 {
486 void *kbuf;
487 int i, j;
488 struct urb *urb;
489 struct usb_device *udev;
490
491 if (dev == NULL)
492 return -ENXIO;
493 udev = dev->udev;
494
495 if (dev->isobufs)
496 STK_ERROR("isobufs already allocated. Bad\n");
497 else
498 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
499 GFP_KERNEL);
500 if (dev->isobufs == NULL) {
501 STK_ERROR("Unable to allocate iso buffers\n");
502 return -ENOMEM;
503 }
504 for (i = 0; i < MAX_ISO_BUFS; i++) {
505 if (dev->isobufs[i].data == NULL) {
506 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
507 if (kbuf == NULL) {
508 STK_ERROR("Failed to allocate iso buffer %d\n",
509 i);
510 goto isobufs_out;
511 }
512 dev->isobufs[i].data = kbuf;
513 } else
514 STK_ERROR("isobuf data already allocated\n");
515 if (dev->isobufs[i].urb == NULL) {
516 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
517 if (urb == NULL) {
518 STK_ERROR("Failed to allocate URB %d\n", i);
519 goto isobufs_out;
520 }
521 dev->isobufs[i].urb = urb;
522 } else {
523 STK_ERROR("Killing URB\n");
524 usb_kill_urb(dev->isobufs[i].urb);
525 urb = dev->isobufs[i].urb;
526 }
527 urb->interval = 1;
528 urb->dev = udev;
529 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
530 urb->transfer_flags = URB_ISO_ASAP;
531 urb->transfer_buffer = dev->isobufs[i].data;
532 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
533 urb->complete = stk_isoc_handler;
534 urb->context = dev;
535 urb->start_frame = 0;
536 urb->number_of_packets = ISO_FRAMES_PER_DESC;
537
538 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
539 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
540 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
541 }
542 }
543 set_memallocd(dev);
544 return 0;
545
546 isobufs_out:
547 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
548 kfree(dev->isobufs[i].data);
549 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
550 usb_free_urb(dev->isobufs[i].urb);
551 kfree(dev->isobufs);
552 dev->isobufs = NULL;
553 return -ENOMEM;
554 }
555
556 static void stk_clean_iso(struct stk_camera *dev)
557 {
558 int i;
559
560 if (dev == NULL || dev->isobufs == NULL)
561 return;
562
563 for (i = 0; i < MAX_ISO_BUFS; i++) {
564 struct urb *urb;
565
566 urb = dev->isobufs[i].urb;
567 if (urb) {
568 if (atomic_read(&dev->urbs_used))
569 usb_kill_urb(urb);
570 usb_free_urb(urb);
571 }
572 kfree(dev->isobufs[i].data);
573 }
574 kfree(dev->isobufs);
575 dev->isobufs = NULL;
576 unset_memallocd(dev);
577 }
578
579 static int stk_setup_siobuf(struct stk_camera *dev, int index)
580 {
581 struct stk_sio_buffer *buf = dev->sio_bufs + index;
582 INIT_LIST_HEAD(&buf->list);
583 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
584 buf->buffer = vmalloc_user(buf->v4lbuf.length);
585 if (buf->buffer == NULL)
586 return -ENOMEM;
587 buf->mapcount = 0;
588 buf->dev = dev;
589 buf->v4lbuf.index = index;
590 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
591 buf->v4lbuf.field = V4L2_FIELD_NONE;
592 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
593 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
594 return 0;
595 }
596
597 static int stk_free_sio_buffers(struct stk_camera *dev)
598 {
599 int i;
600 int nbufs;
601 unsigned long flags;
602 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
603 return 0;
604 /*
605 * If any buffers are mapped, we cannot free them at all.
606 */
607 for (i = 0; i < dev->n_sbufs; i++) {
608 if (dev->sio_bufs[i].mapcount > 0)
609 return -EBUSY;
610 }
611 /*
612 * OK, let's do it.
613 */
614 spin_lock_irqsave(&dev->spinlock, flags);
615 INIT_LIST_HEAD(&dev->sio_avail);
616 INIT_LIST_HEAD(&dev->sio_full);
617 nbufs = dev->n_sbufs;
618 dev->n_sbufs = 0;
619 spin_unlock_irqrestore(&dev->spinlock, flags);
620 for (i = 0; i < nbufs; i++) {
621 if (dev->sio_bufs[i].buffer != NULL)
622 vfree(dev->sio_bufs[i].buffer);
623 }
624 kfree(dev->sio_bufs);
625 dev->sio_bufs = NULL;
626 return 0;
627 }
628
629 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
630 {
631 int i;
632 if (dev->sio_bufs != NULL)
633 STK_ERROR("sio_bufs already allocated\n");
634 else {
635 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
636 GFP_KERNEL);
637 if (dev->sio_bufs == NULL)
638 return -ENOMEM;
639 for (i = 0; i < n_sbufs; i++) {
640 if (stk_setup_siobuf(dev, i))
641 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
642 dev->n_sbufs = i+1;
643 }
644 }
645 return 0;
646 }
647
648 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
649 {
650 int err;
651 err = stk_prepare_iso(dev);
652 if (err) {
653 stk_clean_iso(dev);
654 return err;
655 }
656 err = stk_prepare_sio_buffers(dev, n_sbufs);
657 if (err) {
658 stk_free_sio_buffers(dev);
659 return err;
660 }
661 return 0;
662 }
663
664 static void stk_free_buffers(struct stk_camera *dev)
665 {
666 stk_clean_iso(dev);
667 stk_free_sio_buffers(dev);
668 }
669 /* -------------------------------------------- */
670
671 /* v4l file operations */
672
673 static int v4l_stk_open(struct inode *inode, struct file *fp)
674 {
675 struct stk_camera *dev;
676 struct video_device *vdev;
677
678 vdev = video_devdata(fp);
679 dev = vdev_to_camera(vdev);
680
681 if (dev == NULL || !is_present(dev))
682 return -ENXIO;
683 fp->private_data = vdev;
684 kref_get(&dev->kref);
685 usb_autopm_get_interface(dev->interface);
686
687 return 0;
688 }
689
690 static int v4l_stk_release(struct inode *inode, struct file *fp)
691 {
692 struct stk_camera *dev;
693 struct video_device *vdev;
694
695 vdev = video_devdata(fp);
696 if (vdev == NULL) {
697 STK_ERROR("v4l_release called w/o video devdata\n");
698 return -EFAULT;
699 }
700 dev = vdev_to_camera(vdev);
701 if (dev == NULL) {
702 STK_ERROR("v4l_release called on removed device\n");
703 return -ENODEV;
704 }
705
706 if (dev->owner != fp) {
707 usb_autopm_put_interface(dev->interface);
708 kref_put(&dev->kref, stk_camera_cleanup);
709 return 0;
710 }
711
712 stk_stop_stream(dev);
713
714 stk_free_buffers(dev);
715
716 dev->owner = NULL;
717
718 usb_autopm_put_interface(dev->interface);
719 kref_put(&dev->kref, stk_camera_cleanup);
720
721 return 0;
722 }
723
724 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
725 size_t count, loff_t *f_pos)
726 {
727 int i;
728 int ret;
729 unsigned long flags;
730 struct stk_camera *dev;
731 struct video_device *vdev;
732 struct stk_sio_buffer *sbuf;
733
734 vdev = video_devdata(fp);
735 if (vdev == NULL)
736 return -EFAULT;
737 dev = vdev_to_camera(vdev);
738
739 if (dev == NULL)
740 return -EIO;
741
742 if (!is_present(dev))
743 return -EIO;
744 if (dev->owner && dev->owner != fp)
745 return -EBUSY;
746 dev->owner = fp;
747 if (!is_streaming(dev)) {
748 if (stk_initialise(dev)
749 || stk_allocate_buffers(dev, 3)
750 || stk_start_stream(dev))
751 return -ENOMEM;
752 spin_lock_irqsave(&dev->spinlock, flags);
753 for (i = 0; i < dev->n_sbufs; i++) {
754 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
755 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
756 }
757 spin_unlock_irqrestore(&dev->spinlock, flags);
758 }
759 if (*f_pos == 0) {
760 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
761 return -EWOULDBLOCK;
762 ret = wait_event_interruptible(dev->wait_frame,
763 !list_empty(&dev->sio_full) || !is_present(dev));
764 if (ret)
765 return ret;
766 if (!is_present(dev))
767 return -EIO;
768 }
769 if (count + *f_pos > dev->frame_size)
770 count = dev->frame_size - *f_pos;
771 spin_lock_irqsave(&dev->spinlock, flags);
772 if (list_empty(&dev->sio_full)) {
773 spin_unlock_irqrestore(&dev->spinlock, flags);
774 STK_ERROR("BUG: No siobufs ready\n");
775 return 0;
776 }
777 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
778 spin_unlock_irqrestore(&dev->spinlock, flags);
779
780 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
781 return -EFAULT;
782
783 *f_pos += count;
784
785 if (*f_pos >= dev->frame_size) {
786 *f_pos = 0;
787 spin_lock_irqsave(&dev->spinlock, flags);
788 list_move_tail(&sbuf->list, &dev->sio_avail);
789 spin_unlock_irqrestore(&dev->spinlock, flags);
790 }
791 return count;
792 }
793
794 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
795 {
796 struct stk_camera *dev;
797 struct video_device *vdev;
798
799 vdev = video_devdata(fp);
800
801 if (vdev == NULL)
802 return -EFAULT;
803
804 dev = vdev_to_camera(vdev);
805 if (dev == NULL)
806 return -ENODEV;
807
808 poll_wait(fp, &dev->wait_frame, wait);
809
810 if (!is_present(dev))
811 return POLLERR;
812
813 if (!list_empty(&dev->sio_full))
814 return (POLLIN | POLLRDNORM);
815
816 return 0;
817 }
818
819
820 static void stk_v4l_vm_open(struct vm_area_struct *vma)
821 {
822 struct stk_sio_buffer *sbuf = vma->vm_private_data;
823 sbuf->mapcount++;
824 }
825 static void stk_v4l_vm_close(struct vm_area_struct *vma)
826 {
827 struct stk_sio_buffer *sbuf = vma->vm_private_data;
828 sbuf->mapcount--;
829 if (sbuf->mapcount == 0)
830 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
831 }
832 static struct vm_operations_struct stk_v4l_vm_ops = {
833 .open = stk_v4l_vm_open,
834 .close = stk_v4l_vm_close
835 };
836
837 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
838 {
839 unsigned int i;
840 int ret;
841 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
842 struct stk_camera *dev;
843 struct video_device *vdev;
844 struct stk_sio_buffer *sbuf = NULL;
845
846 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
847 return -EINVAL;
848
849 vdev = video_devdata(fp);
850 dev = vdev_to_camera(vdev);
851
852 for (i = 0; i < dev->n_sbufs; i++) {
853 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
854 sbuf = dev->sio_bufs + i;
855 break;
856 }
857 }
858 if (sbuf == NULL)
859 return -EINVAL;
860 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
861 if (ret)
862 return ret;
863 vma->vm_flags |= VM_DONTEXPAND;
864 vma->vm_private_data = sbuf;
865 vma->vm_ops = &stk_v4l_vm_ops;
866 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
867 stk_v4l_vm_open(vma);
868 return 0;
869 }
870
871 /* v4l ioctl handlers */
872
873 static int stk_vidioc_querycap(struct file *filp,
874 void *priv, struct v4l2_capability *cap)
875 {
876 strcpy(cap->driver, "stk");
877 strcpy(cap->card, "stk");
878 cap->version = DRIVER_VERSION_NUM;
879
880 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
881 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
882 return 0;
883 }
884
885 static int stk_vidioc_enum_input(struct file *filp,
886 void *priv, struct v4l2_input *input)
887 {
888 if (input->index != 0)
889 return -EINVAL;
890
891 strcpy(input->name, "Syntek USB Camera");
892 input->type = V4L2_INPUT_TYPE_CAMERA;
893 return 0;
894 }
895
896
897 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
898 {
899 *i = 0;
900 return 0;
901 }
902
903 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
904 {
905 if (i != 0)
906 return -EINVAL;
907 else
908 return 0;
909 }
910
911 /* from vivi.c */
912 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
913 {
914 return 0;
915 }
916
917 /* List of all V4Lv2 controls supported by the driver */
918 static struct v4l2_queryctrl stk_controls[] = {
919 {
920 .id = V4L2_CID_BRIGHTNESS,
921 .type = V4L2_CTRL_TYPE_INTEGER,
922 .name = "Brightness",
923 .minimum = 0,
924 .maximum = 0xffff,
925 .step = 0x0100,
926 .default_value = 0x6000,
927 },
928 /*TODO: get more controls to work */
929 };
930
931 static int stk_vidioc_queryctrl(struct file *filp,
932 void *priv, struct v4l2_queryctrl *c)
933 {
934 int i;
935 int nbr;
936 nbr = ARRAY_SIZE(stk_controls);
937
938 for (i = 0; i < nbr; i++) {
939 if (stk_controls[i].id == c->id) {
940 memcpy(c, &stk_controls[i],
941 sizeof(struct v4l2_queryctrl));
942 return 0;
943 }
944 }
945 return -EINVAL;
946 }
947
948 static int stk_vidioc_g_ctrl(struct file *filp,
949 void *priv, struct v4l2_control *c)
950 {
951 struct stk_camera *dev = priv;
952 switch (c->id) {
953 case V4L2_CID_BRIGHTNESS:
954 c->value = dev->vsettings.brightness;
955 break;
956 default:
957 return -EINVAL;
958 }
959 return 0;
960 }
961
962 static int stk_vidioc_s_ctrl(struct file *filp,
963 void *priv, struct v4l2_control *c)
964 {
965 struct stk_camera *dev = priv;
966 switch (c->id) {
967 case V4L2_CID_BRIGHTNESS:
968 dev->vsettings.brightness = c->value;
969 return stk_sensor_set_brightness(dev, c->value >> 8);
970 default:
971 return -EINVAL;
972 }
973 return 0;
974 }
975
976
977 static int stk_vidioc_enum_fmt_cap(struct file *filp,
978 void *priv, struct v4l2_fmtdesc *fmtd)
979 {
980 fmtd->flags = 0;
981
982 switch (fmtd->index) {
983 case 0:
984 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
985 strcpy(fmtd->description, "r5g6b5");
986 break;
987 case 1:
988 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
989 strcpy(fmtd->description, "r5g6b5BE");
990 break;
991 case 2:
992 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
993 strcpy(fmtd->description, "yuv4:2:2");
994 break;
995 case 3:
996 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
997 strcpy(fmtd->description, "Raw bayer");
998 break;
999 case 4:
1000 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1001 strcpy(fmtd->description, "yuv4:2:2");
1002 break;
1003 default:
1004 return -EINVAL;
1005 }
1006 return 0;
1007 }
1008
1009 static struct stk_size {
1010 unsigned w;
1011 unsigned h;
1012 enum stk_mode m;
1013 } stk_sizes[] = {
1014 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
1015 { .w = 640, .h = 480, .m = MODE_VGA, },
1016 { .w = 352, .h = 288, .m = MODE_CIF, },
1017 { .w = 320, .h = 240, .m = MODE_QVGA, },
1018 { .w = 176, .h = 144, .m = MODE_QCIF, },
1019 };
1020
1021 static int stk_vidioc_g_fmt_cap(struct file *filp,
1022 void *priv, struct v4l2_format *f)
1023 {
1024 struct v4l2_pix_format *pix_format = &f->fmt.pix;
1025 struct stk_camera *dev = priv;
1026 int i;
1027
1028 for (i = 0; i < ARRAY_SIZE(stk_sizes)
1029 && stk_sizes[i].m != dev->vsettings.mode;
1030 i++);
1031 if (i == ARRAY_SIZE(stk_sizes)) {
1032 STK_ERROR("ERROR: mode invalid\n");
1033 return -EINVAL;
1034 }
1035 pix_format->width = stk_sizes[i].w;
1036 pix_format->height = stk_sizes[i].h;
1037 pix_format->field = V4L2_FIELD_NONE;
1038 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
1039 pix_format->priv = 0;
1040 pix_format->pixelformat = dev->vsettings.palette;
1041 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1042 pix_format->bytesperline = pix_format->width;
1043 else
1044 pix_format->bytesperline = 2 * pix_format->width;
1045 pix_format->sizeimage = pix_format->bytesperline
1046 * pix_format->height;
1047 return 0;
1048 }
1049
1050 static int stk_vidioc_try_fmt_cap(struct file *filp,
1051 void *priv, struct v4l2_format *fmtd)
1052 {
1053 int i;
1054 switch (fmtd->fmt.pix.pixelformat) {
1055 case V4L2_PIX_FMT_RGB565:
1056 case V4L2_PIX_FMT_RGB565X:
1057 case V4L2_PIX_FMT_UYVY:
1058 case V4L2_PIX_FMT_YUYV:
1059 case V4L2_PIX_FMT_SBGGR8:
1060 break;
1061 default:
1062 return -EINVAL;
1063 }
1064 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1065 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1066 break;
1067 }
1068 if (i == ARRAY_SIZE(stk_sizes)
1069 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1070 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1071 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1072 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1073 fmtd->fmt.pix.priv = i - 1;
1074 } else {
1075 fmtd->fmt.pix.height = stk_sizes[i].h;
1076 fmtd->fmt.pix.width = stk_sizes[i].w;
1077 fmtd->fmt.pix.priv = i;
1078 }
1079
1080 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1081 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1082 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1083 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1084 else
1085 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1086 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1087 * fmtd->fmt.pix.height;
1088 return 0;
1089 }
1090
1091 static int stk_setup_format(struct stk_camera *dev)
1092 {
1093 int i = 0;
1094 int depth;
1095 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1096 depth = 1;
1097 else
1098 depth = 2;
1099 while (stk_sizes[i].m != dev->vsettings.mode
1100 && i < ARRAY_SIZE(stk_sizes))
1101 i++;
1102 if (i == ARRAY_SIZE(stk_sizes)) {
1103 STK_ERROR("Something is broken in %s\n", __FUNCTION__);
1104 return -EFAULT;
1105 }
1106 /* This registers controls some timings, not sure of what. */
1107 stk_camera_write_reg(dev, 0x001b, 0x0e);
1108 if (dev->vsettings.mode == MODE_SXGA)
1109 stk_camera_write_reg(dev, 0x001c, 0x0e);
1110 else
1111 stk_camera_write_reg(dev, 0x001c, 0x46);
1112 /*
1113 * Registers 0x0115 0x0114 are the size of each line (bytes),
1114 * regs 0x0117 0x0116 are the heigth of the image.
1115 */
1116 stk_camera_write_reg(dev, 0x0115,
1117 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1118 stk_camera_write_reg(dev, 0x0114,
1119 (stk_sizes[i].w * depth) & 0xff);
1120 stk_camera_write_reg(dev, 0x0117,
1121 (stk_sizes[i].h >> 8) & 0xff);
1122 stk_camera_write_reg(dev, 0x0116,
1123 stk_sizes[i].h & 0xff);
1124 return stk_sensor_configure(dev);
1125 }
1126
1127 static int stk_vidioc_s_fmt_cap(struct file *filp,
1128 void *priv, struct v4l2_format *fmtd)
1129 {
1130 int ret;
1131 struct stk_camera *dev = priv;
1132
1133 if (dev == NULL)
1134 return -ENODEV;
1135 if (!is_present(dev))
1136 return -ENODEV;
1137 if (is_streaming(dev))
1138 return -EBUSY;
1139 if (dev->owner && dev->owner != filp)
1140 return -EBUSY;
1141 ret = stk_vidioc_try_fmt_cap(filp, priv, fmtd);
1142 if (ret)
1143 return ret;
1144 dev->owner = filp;
1145
1146 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1147 stk_free_buffers(dev);
1148 dev->frame_size = fmtd->fmt.pix.sizeimage;
1149 dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1150
1151 stk_initialise(dev);
1152 return stk_setup_format(dev);
1153 }
1154
1155 static int stk_vidioc_reqbufs(struct file *filp,
1156 void *priv, struct v4l2_requestbuffers *rb)
1157 {
1158 struct stk_camera *dev = priv;
1159
1160 if (dev == NULL)
1161 return -ENODEV;
1162 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1163 return -EINVAL;
1164 if (rb->memory != V4L2_MEMORY_MMAP)
1165 return -EINVAL;
1166 if (is_streaming(dev)
1167 || (dev->owner && dev->owner != filp))
1168 return -EBUSY;
1169 dev->owner = filp;
1170
1171 /*FIXME If they ask for zero, we must stop streaming and free */
1172 if (rb->count < 3)
1173 rb->count = 3;
1174 /* Arbitrary limit */
1175 else if (rb->count > 5)
1176 rb->count = 5;
1177
1178 stk_allocate_buffers(dev, rb->count);
1179 rb->count = dev->n_sbufs;
1180 return 0;
1181 }
1182
1183 static int stk_vidioc_querybuf(struct file *filp,
1184 void *priv, struct v4l2_buffer *buf)
1185 {
1186 int index;
1187 struct stk_camera *dev = priv;
1188 struct stk_sio_buffer *sbuf;
1189
1190 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1191 return -EINVAL;
1192
1193 index = buf->index;
1194
1195 if (index < 0 || index >= dev->n_sbufs)
1196 return -EINVAL;
1197 sbuf = dev->sio_bufs + buf->index;
1198 *buf = sbuf->v4lbuf;
1199 return 0;
1200 }
1201
1202 static int stk_vidioc_qbuf(struct file *filp,
1203 void *priv, struct v4l2_buffer *buf)
1204 {
1205 struct stk_camera *dev = priv;
1206 struct stk_sio_buffer *sbuf;
1207 unsigned long flags;
1208 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1209 return -EINVAL;
1210
1211 if (buf->memory != V4L2_MEMORY_MMAP)
1212 return -EINVAL;
1213
1214 if (buf->index < 0 || buf->index >= dev->n_sbufs)
1215 return -EINVAL;
1216 sbuf = dev->sio_bufs + buf->index;
1217 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1218 return 0;
1219 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1220 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1221 spin_lock_irqsave(&dev->spinlock, flags);
1222 list_add_tail(&sbuf->list, &dev->sio_avail);
1223 *buf = sbuf->v4lbuf;
1224 spin_unlock_irqrestore(&dev->spinlock, flags);
1225 return 0;
1226 }
1227
1228 static int stk_vidioc_dqbuf(struct file *filp,
1229 void *priv, struct v4l2_buffer *buf)
1230 {
1231 struct stk_camera *dev = priv;
1232 struct stk_sio_buffer *sbuf;
1233 unsigned long flags;
1234 int ret;
1235
1236 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1237 || !is_streaming(dev))
1238 return -EINVAL;
1239
1240 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1241 return -EWOULDBLOCK;
1242 ret = wait_event_interruptible(dev->wait_frame,
1243 !list_empty(&dev->sio_full) || !is_present(dev));
1244 if (ret)
1245 return ret;
1246 if (!is_present(dev))
1247 return -EIO;
1248
1249 spin_lock_irqsave(&dev->spinlock, flags);
1250 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1251 list_del_init(&sbuf->list);
1252 spin_unlock_irqrestore(&dev->spinlock, flags);
1253 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1254 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1255 sbuf->v4lbuf.sequence = ++dev->sequence;
1256 do_gettimeofday(&sbuf->v4lbuf.timestamp);
1257
1258 *buf = sbuf->v4lbuf;
1259 return 0;
1260 }
1261
1262 static int stk_vidioc_streamon(struct file *filp,
1263 void *priv, enum v4l2_buf_type type)
1264 {
1265 struct stk_camera *dev = priv;
1266 if (is_streaming(dev))
1267 return 0;
1268 if (dev->sio_bufs == NULL)
1269 return -EINVAL;
1270 dev->sequence = 0;
1271 return stk_start_stream(dev);
1272 }
1273
1274 static int stk_vidioc_streamoff(struct file *filp,
1275 void *priv, enum v4l2_buf_type type)
1276 {
1277 struct stk_camera *dev = priv;
1278 unsigned long flags;
1279 int i;
1280 stk_stop_stream(dev);
1281 spin_lock_irqsave(&dev->spinlock, flags);
1282 INIT_LIST_HEAD(&dev->sio_avail);
1283 INIT_LIST_HEAD(&dev->sio_full);
1284 for (i = 0; i < dev->n_sbufs; i++) {
1285 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1286 dev->sio_bufs[i].v4lbuf.flags = 0;
1287 }
1288 spin_unlock_irqrestore(&dev->spinlock, flags);
1289 return 0;
1290 }
1291
1292
1293 static int stk_vidioc_g_parm(struct file *filp,
1294 void *priv, struct v4l2_streamparm *sp)
1295 {
1296 if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1297 return -EINVAL;
1298
1299 sp->parm.capture.capability = 0;
1300 sp->parm.capture.capturemode = 0;
1301 /*FIXME This is not correct */
1302 sp->parm.capture.timeperframe.numerator = 1;
1303 sp->parm.capture.timeperframe.denominator = 30;
1304 sp->parm.capture.readbuffers = 2;
1305 sp->parm.capture.extendedmode = 0;
1306 return 0;
1307 }
1308
1309 static struct file_operations v4l_stk_fops = {
1310 .owner = THIS_MODULE,
1311 .open = v4l_stk_open,
1312 .release = v4l_stk_release,
1313 .read = v4l_stk_read,
1314 .poll = v4l_stk_poll,
1315 .mmap = v4l_stk_mmap,
1316 .ioctl = video_ioctl2,
1317 #ifdef CONFIG_COMPAT
1318 .compat_ioctl = v4l_compat_ioctl32,
1319 #endif
1320 .llseek = no_llseek
1321 };
1322
1323 static void stk_v4l_dev_release(struct video_device *vd)
1324 {
1325 }
1326
1327 static struct video_device stk_v4l_data = {
1328 .name = "stkwebcam",
1329 .type = VFL_TYPE_GRABBER,
1330 .type2 = VID_TYPE_CAPTURE,
1331 .minor = -1,
1332 .tvnorms = V4L2_STD_UNKNOWN,
1333 .current_norm = V4L2_STD_UNKNOWN,
1334 .fops = &v4l_stk_fops,
1335 .release = stk_v4l_dev_release,
1336
1337 .vidioc_querycap = stk_vidioc_querycap,
1338 .vidioc_enum_fmt_cap = stk_vidioc_enum_fmt_cap,
1339 .vidioc_try_fmt_cap = stk_vidioc_try_fmt_cap,
1340 .vidioc_s_fmt_cap = stk_vidioc_s_fmt_cap,
1341 .vidioc_g_fmt_cap = stk_vidioc_g_fmt_cap,
1342 .vidioc_enum_input = stk_vidioc_enum_input,
1343 .vidioc_s_input = stk_vidioc_s_input,
1344 .vidioc_g_input = stk_vidioc_g_input,
1345 .vidioc_s_std = stk_vidioc_s_std,
1346 .vidioc_reqbufs = stk_vidioc_reqbufs,
1347 .vidioc_querybuf = stk_vidioc_querybuf,
1348 .vidioc_qbuf = stk_vidioc_qbuf,
1349 .vidioc_dqbuf = stk_vidioc_dqbuf,
1350 .vidioc_streamon = stk_vidioc_streamon,
1351 .vidioc_streamoff = stk_vidioc_streamoff,
1352 .vidioc_queryctrl = stk_vidioc_queryctrl,
1353 .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1354 .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1355 .vidioc_g_parm = stk_vidioc_g_parm,
1356 };
1357
1358
1359 static int stk_register_video_device(struct stk_camera *dev)
1360 {
1361 int err;
1362
1363 dev->vdev = stk_v4l_data;
1364 dev->vdev.debug = debug;
1365 dev->vdev.dev = &dev->interface->dev;
1366 dev->vdev.priv = dev;
1367 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1368 if (err)
1369 STK_ERROR("v4l registration failed\n");
1370 else
1371 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1372 " /dev/video%d\n", dev->vdev.minor);
1373 return err;
1374 }
1375
1376
1377 /* USB Stuff */
1378
1379 static int stk_camera_probe(struct usb_interface *interface,
1380 const struct usb_device_id *id)
1381 {
1382 int i;
1383 int err;
1384
1385 struct stk_camera *dev = NULL;
1386 struct usb_device *udev = interface_to_usbdev(interface);
1387 struct usb_host_interface *iface_desc;
1388 struct usb_endpoint_descriptor *endpoint;
1389
1390 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1391 if (dev == NULL) {
1392 STK_ERROR("Out of memory !\n");
1393 return -ENOMEM;
1394 }
1395
1396 kref_init(&dev->kref);
1397 spin_lock_init(&dev->spinlock);
1398 init_waitqueue_head(&dev->wait_frame);
1399
1400 dev->udev = udev;
1401 dev->interface = interface;
1402 usb_get_intf(interface);
1403
1404 dev->vsettings.vflip = vflip;
1405 dev->vsettings.hflip = hflip;
1406 dev->n_sbufs = 0;
1407 set_present(dev);
1408
1409 /* Set up the endpoint information
1410 * use only the first isoc-in endpoint
1411 * for the current alternate setting */
1412 iface_desc = interface->cur_altsetting;
1413
1414 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1415 endpoint = &iface_desc->endpoint[i].desc;
1416
1417 if (!dev->isoc_ep
1418 && ((endpoint->bEndpointAddress
1419 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1420 && ((endpoint->bmAttributes
1421 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1422 /* we found an isoc in endpoint */
1423 dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1424 break;
1425 }
1426 }
1427 if (!dev->isoc_ep) {
1428 STK_ERROR("Could not find isoc-in endpoint");
1429 kref_put(&dev->kref, stk_camera_cleanup);
1430 return -ENODEV;
1431 }
1432 dev->vsettings.brightness = 0x7fff;
1433 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1434 dev->vsettings.mode = MODE_VGA;
1435 dev->frame_size = 640 * 480 * 2;
1436
1437 INIT_LIST_HEAD(&dev->sio_avail);
1438 INIT_LIST_HEAD(&dev->sio_full);
1439
1440 usb_set_intfdata(interface, dev);
1441
1442 err = stk_register_video_device(dev);
1443 if (err) {
1444 kref_put(&dev->kref, stk_camera_cleanup);
1445 return err;
1446 }
1447
1448 stk_create_sysfs_files(&dev->vdev);
1449 usb_autopm_enable(dev->interface);
1450
1451 return 0;
1452 }
1453
1454 static void stk_camera_disconnect(struct usb_interface *interface)
1455 {
1456 struct stk_camera *dev = usb_get_intfdata(interface);
1457
1458 usb_set_intfdata(interface, NULL);
1459 unset_present(dev);
1460
1461 wake_up_interruptible(&dev->wait_frame);
1462 stk_remove_sysfs_files(&dev->vdev);
1463
1464 kref_put(&dev->kref, stk_camera_cleanup);
1465 }
1466
1467 #ifdef CONFIG_PM
1468 int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1469 {
1470 struct stk_camera *dev = usb_get_intfdata(intf);
1471 if (is_streaming(dev)) {
1472 stk_stop_stream(dev);
1473 /* yes, this is ugly */
1474 set_streaming(dev);
1475 }
1476 return 0;
1477 }
1478
1479 int stk_camera_resume(struct usb_interface *intf)
1480 {
1481 struct stk_camera *dev = usb_get_intfdata(intf);
1482 if (!is_initialised(dev))
1483 return 0;
1484 unset_initialised(dev);
1485 stk_initialise(dev);
1486 stk_setup_format(dev);
1487 if (is_streaming(dev))
1488 stk_start_stream(dev);
1489 return 0;
1490 }
1491 #endif
1492
1493 static struct usb_driver stk_camera_driver = {
1494 .name = "stkwebcam",
1495 .probe = stk_camera_probe,
1496 .disconnect = stk_camera_disconnect,
1497 .id_table = stkwebcam_table,
1498 #ifdef CONFIG_PM
1499 .suspend = stk_camera_suspend,
1500 .resume = stk_camera_resume,
1501 #endif
1502 };
1503
1504
1505 static int __init stk_camera_init(void)
1506 {
1507 int result;
1508
1509 result = usb_register(&stk_camera_driver);
1510 if (result)
1511 STK_ERROR("usb_register failed ! Error number %d\n", result);
1512
1513
1514 return result;
1515 }
1516
1517 static void __exit stk_camera_exit(void)
1518 {
1519 usb_deregister(&stk_camera_driver);
1520 }
1521
1522 module_init(stk_camera_init);
1523 module_exit(stk_camera_exit);
1524
1525
Linux with added FPC-III support