This source file includes following definitions.
- stk_camera_write_reg
- stk_camera_read_reg
- stk_start_stream
- stk_stop_stream
- stk_initialise
- stk_isoc_handler
- stk_prepare_iso
- stk_clean_iso
- stk_setup_siobuf
- stk_free_sio_buffers
- stk_prepare_sio_buffers
- stk_allocate_buffers
- stk_free_buffers
- v4l_stk_open
- v4l_stk_release
- stk_read
- v4l_stk_read
- v4l_stk_poll
- stk_v4l_vm_open
- stk_v4l_vm_close
- v4l_stk_mmap
- stk_vidioc_querycap
- stk_vidioc_enum_input
- stk_vidioc_g_input
- stk_vidioc_s_input
- stk_s_ctrl
- stk_vidioc_enum_fmt_vid_cap
- stk_vidioc_g_fmt_vid_cap
- stk_try_fmt_vid_cap
- stk_vidioc_try_fmt_vid_cap
- stk_setup_format
- stk_vidioc_s_fmt_vid_cap
- stk_vidioc_reqbufs
- stk_vidioc_querybuf
- stk_vidioc_qbuf
- stk_vidioc_dqbuf
- stk_vidioc_streamon
- stk_vidioc_streamoff
- stk_vidioc_g_parm
- stk_vidioc_enum_framesizes
- stk_v4l_dev_release
- stk_register_video_device
- stk_camera_probe
- stk_camera_disconnect
- stk_camera_suspend
- stk_camera_resume
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12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19
20 #include <linux/dmi.h>
21 #include <linux/usb.h>
22 #include <linux/mm.h>
23 #include <linux/vmalloc.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-ioctl.h>
27 #include <media/v4l2-event.h>
28
29 #include "stk-webcam.h"
30
31
32 static int hflip = -1;
33 module_param(hflip, int, 0444);
34 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
35
36 static int vflip = -1;
37 module_param(vflip, int, 0444);
38 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
39
40 static int debug;
41 module_param(debug, int, 0444);
42 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
43
44 MODULE_LICENSE("GPL");
45 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
46 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
47
48
49 static const struct usb_device_id stkwebcam_table[] = {
50 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
51 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
52 { }
53 };
54 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
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88
89 static const struct dmi_system_id stk_upside_down_dmi_table[] = {
90 {
91 .ident = "ASUS G1",
92 .matches = {
93 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
94 DMI_MATCH(DMI_PRODUCT_NAME, "G1")
95 }
96 }, {
97 .ident = "ASUS F3JC",
98 .matches = {
99 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
100 DMI_MATCH(DMI_PRODUCT_NAME, "F3JC")
101 }
102 },
103 {
104 .ident = "T12Rg-H",
105 .matches = {
106 DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"),
107 DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H")
108 }
109 },
110 {
111 .ident = "ASUS A6VM",
112 .matches = {
113 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
114 DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
115 }
116 },
117 {}
118 };
119
120
121
122
123
124 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
125 {
126 struct usb_device *udev = dev->udev;
127 int ret;
128
129 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
130 0x01,
131 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
132 value,
133 index,
134 NULL,
135 0,
136 500);
137 if (ret < 0)
138 return ret;
139 else
140 return 0;
141 }
142
143 int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value)
144 {
145 struct usb_device *udev = dev->udev;
146 unsigned char *buf;
147 int ret;
148
149 buf = kmalloc(sizeof(u8), GFP_KERNEL);
150 if (!buf)
151 return -ENOMEM;
152
153 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
154 0x00,
155 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
156 0x00,
157 index,
158 buf,
159 sizeof(u8),
160 500);
161 if (ret >= 0)
162 *value = *buf;
163
164 kfree(buf);
165
166 if (ret < 0)
167 return ret;
168 else
169 return 0;
170 }
171
172 static int stk_start_stream(struct stk_camera *dev)
173 {
174 u8 value;
175 int i, ret;
176 u8 value_116, value_117;
177
178
179 if (!is_present(dev))
180 return -ENODEV;
181 if (!is_memallocd(dev) || !is_initialised(dev)) {
182 pr_err("FIXME: Buffers are not allocated\n");
183 return -EFAULT;
184 }
185 ret = usb_set_interface(dev->udev, 0, 5);
186
187 if (ret < 0)
188 pr_err("usb_set_interface failed !\n");
189 if (stk_sensor_wakeup(dev))
190 pr_err("error awaking the sensor\n");
191
192 stk_camera_read_reg(dev, 0x0116, &value_116);
193 stk_camera_read_reg(dev, 0x0117, &value_117);
194
195 stk_camera_write_reg(dev, 0x0116, 0x0000);
196 stk_camera_write_reg(dev, 0x0117, 0x0000);
197
198 stk_camera_read_reg(dev, 0x0100, &value);
199 stk_camera_write_reg(dev, 0x0100, value | 0x80);
200
201 stk_camera_write_reg(dev, 0x0116, value_116);
202 stk_camera_write_reg(dev, 0x0117, value_117);
203 for (i = 0; i < MAX_ISO_BUFS; i++) {
204 if (dev->isobufs[i].urb) {
205 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
206 atomic_inc(&dev->urbs_used);
207 if (ret)
208 return ret;
209 }
210 }
211 set_streaming(dev);
212 return 0;
213 }
214
215 static int stk_stop_stream(struct stk_camera *dev)
216 {
217 u8 value;
218 int i;
219 if (is_present(dev)) {
220 stk_camera_read_reg(dev, 0x0100, &value);
221 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
222 if (dev->isobufs != NULL) {
223 for (i = 0; i < MAX_ISO_BUFS; i++) {
224 if (dev->isobufs[i].urb)
225 usb_kill_urb(dev->isobufs[i].urb);
226 }
227 }
228 unset_streaming(dev);
229
230 if (usb_set_interface(dev->udev, 0, 0))
231 pr_err("usb_set_interface failed !\n");
232 if (stk_sensor_sleep(dev))
233 pr_err("error suspending the sensor\n");
234 }
235 return 0;
236 }
237
238
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240
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243
244
245
246 static struct regval stk1125_initvals[] = {
247
248 {0x0000, 0x24},
249 {0x0100, 0x21},
250 {0x0002, 0x68},
251 {0x0003, 0x80},
252 {0x0005, 0x00},
253 {0x0007, 0x03},
254 {0x000d, 0x00},
255 {0x000f, 0x02},
256 {0x0300, 0x12},
257 {0x0350, 0x41},
258 {0x0351, 0x00},
259 {0x0352, 0x00},
260 {0x0353, 0x00},
261 {0x0018, 0x10},
262 {0x0019, 0x00},
263 {0x001b, 0x0e},
264 {0x001c, 0x46},
265 {0x0300, 0x80},
266 {0x001a, 0x04},
267 {0x0110, 0x00},
268 {0x0111, 0x00},
269 {0x0112, 0x00},
270 {0x0113, 0x00},
271
272 {0xffff, 0xff},
273 };
274
275
276 static int stk_initialise(struct stk_camera *dev)
277 {
278 struct regval *rv;
279 int ret;
280 if (!is_present(dev))
281 return -ENODEV;
282 if (is_initialised(dev))
283 return 0;
284 rv = stk1125_initvals;
285 while (rv->reg != 0xffff) {
286 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
287 if (ret)
288 return ret;
289 rv++;
290 }
291 if (stk_sensor_init(dev) == 0) {
292 set_initialised(dev);
293 return 0;
294 } else
295 return -1;
296 }
297
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302
303
304 static void stk_isoc_handler(struct urb *urb)
305 {
306 int i;
307 int ret;
308 int framelen;
309 unsigned long flags;
310
311 unsigned char *fill = NULL;
312 unsigned char *iso_buf = NULL;
313
314 struct stk_camera *dev;
315 struct stk_sio_buffer *fb;
316
317 dev = (struct stk_camera *) urb->context;
318
319 if (dev == NULL) {
320 pr_err("isoc_handler called with NULL device !\n");
321 return;
322 }
323
324 if (urb->status == -ENOENT || urb->status == -ECONNRESET
325 || urb->status == -ESHUTDOWN) {
326 atomic_dec(&dev->urbs_used);
327 return;
328 }
329
330 spin_lock_irqsave(&dev->spinlock, flags);
331
332 if (urb->status != -EINPROGRESS && urb->status != 0) {
333 pr_err("isoc_handler: urb->status == %d\n", urb->status);
334 goto resubmit;
335 }
336
337 if (list_empty(&dev->sio_avail)) {
338
339 pr_err_ratelimited("isoc_handler without available buffer!\n");
340 goto resubmit;
341 }
342 fb = list_first_entry(&dev->sio_avail,
343 struct stk_sio_buffer, list);
344 fill = fb->buffer + fb->v4lbuf.bytesused;
345
346 for (i = 0; i < urb->number_of_packets; i++) {
347 if (urb->iso_frame_desc[i].status != 0) {
348 if (urb->iso_frame_desc[i].status != -EXDEV)
349 pr_err("Frame %d has error %d\n",
350 i, urb->iso_frame_desc[i].status);
351 continue;
352 }
353 framelen = urb->iso_frame_desc[i].actual_length;
354 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
355
356 if (framelen <= 4)
357 continue;
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367
368 if (*iso_buf & 0x80) {
369 framelen -= 8;
370 iso_buf += 8;
371
372 if (fb->v4lbuf.bytesused != 0
373 && fb->v4lbuf.bytesused != dev->frame_size) {
374 pr_err_ratelimited("frame %d, bytesused=%d, skipping\n",
375 i, fb->v4lbuf.bytesused);
376 fb->v4lbuf.bytesused = 0;
377 fill = fb->buffer;
378 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
379 if (list_is_singular(&dev->sio_avail)) {
380
381 fb->v4lbuf.bytesused = 0;
382 fill = fb->buffer;
383 } else {
384 list_move_tail(dev->sio_avail.next,
385 &dev->sio_full);
386 wake_up(&dev->wait_frame);
387 fb = list_first_entry(&dev->sio_avail,
388 struct stk_sio_buffer, list);
389 fb->v4lbuf.bytesused = 0;
390 fill = fb->buffer;
391 }
392 }
393 } else {
394 framelen -= 4;
395 iso_buf += 4;
396 }
397
398
399 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
400 pr_err_ratelimited("Frame buffer overflow, lost sync\n");
401
402 continue;
403 }
404 spin_unlock_irqrestore(&dev->spinlock, flags);
405 memcpy(fill, iso_buf, framelen);
406 spin_lock_irqsave(&dev->spinlock, flags);
407 fill += framelen;
408
409
410 fb->v4lbuf.bytesused += framelen;
411 }
412
413 resubmit:
414 spin_unlock_irqrestore(&dev->spinlock, flags);
415 urb->dev = dev->udev;
416 ret = usb_submit_urb(urb, GFP_ATOMIC);
417 if (ret != 0) {
418 pr_err("Error (%d) re-submitting urb in stk_isoc_handler\n",
419 ret);
420 }
421 }
422
423
424
425 static int stk_prepare_iso(struct stk_camera *dev)
426 {
427 void *kbuf;
428 int i, j;
429 struct urb *urb;
430 struct usb_device *udev;
431
432 if (dev == NULL)
433 return -ENXIO;
434 udev = dev->udev;
435
436 if (dev->isobufs)
437 pr_err("isobufs already allocated. Bad\n");
438 else
439 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
440 GFP_KERNEL);
441 if (dev->isobufs == NULL) {
442 pr_err("Unable to allocate iso buffers\n");
443 return -ENOMEM;
444 }
445 for (i = 0; i < MAX_ISO_BUFS; i++) {
446 if (dev->isobufs[i].data == NULL) {
447 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
448 if (kbuf == NULL) {
449 pr_err("Failed to allocate iso buffer %d\n", i);
450 goto isobufs_out;
451 }
452 dev->isobufs[i].data = kbuf;
453 } else
454 pr_err("isobuf data already allocated\n");
455 if (dev->isobufs[i].urb == NULL) {
456 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
457 if (urb == NULL)
458 goto isobufs_out;
459 dev->isobufs[i].urb = urb;
460 } else {
461 pr_err("Killing URB\n");
462 usb_kill_urb(dev->isobufs[i].urb);
463 urb = dev->isobufs[i].urb;
464 }
465 urb->interval = 1;
466 urb->dev = udev;
467 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
468 urb->transfer_flags = URB_ISO_ASAP;
469 urb->transfer_buffer = dev->isobufs[i].data;
470 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
471 urb->complete = stk_isoc_handler;
472 urb->context = dev;
473 urb->start_frame = 0;
474 urb->number_of_packets = ISO_FRAMES_PER_DESC;
475
476 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
477 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
478 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
479 }
480 }
481 set_memallocd(dev);
482 return 0;
483
484 isobufs_out:
485 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
486 kfree(dev->isobufs[i].data);
487 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
488 usb_free_urb(dev->isobufs[i].urb);
489 kfree(dev->isobufs);
490 dev->isobufs = NULL;
491 return -ENOMEM;
492 }
493
494 static void stk_clean_iso(struct stk_camera *dev)
495 {
496 int i;
497
498 if (dev == NULL || dev->isobufs == NULL)
499 return;
500
501 for (i = 0; i < MAX_ISO_BUFS; i++) {
502 struct urb *urb;
503
504 urb = dev->isobufs[i].urb;
505 if (urb) {
506 if (atomic_read(&dev->urbs_used) && is_present(dev))
507 usb_kill_urb(urb);
508 usb_free_urb(urb);
509 }
510 kfree(dev->isobufs[i].data);
511 }
512 kfree(dev->isobufs);
513 dev->isobufs = NULL;
514 unset_memallocd(dev);
515 }
516
517 static int stk_setup_siobuf(struct stk_camera *dev, int index)
518 {
519 struct stk_sio_buffer *buf = dev->sio_bufs + index;
520 INIT_LIST_HEAD(&buf->list);
521 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
522 buf->buffer = vmalloc_user(buf->v4lbuf.length);
523 if (buf->buffer == NULL)
524 return -ENOMEM;
525 buf->mapcount = 0;
526 buf->dev = dev;
527 buf->v4lbuf.index = index;
528 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
529 buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
530 buf->v4lbuf.field = V4L2_FIELD_NONE;
531 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
532 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
533 return 0;
534 }
535
536 static int stk_free_sio_buffers(struct stk_camera *dev)
537 {
538 int i;
539 int nbufs;
540 unsigned long flags;
541 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
542 return 0;
543
544
545
546 for (i = 0; i < dev->n_sbufs; i++) {
547 if (dev->sio_bufs[i].mapcount > 0)
548 return -EBUSY;
549 }
550
551
552
553 spin_lock_irqsave(&dev->spinlock, flags);
554 INIT_LIST_HEAD(&dev->sio_avail);
555 INIT_LIST_HEAD(&dev->sio_full);
556 nbufs = dev->n_sbufs;
557 dev->n_sbufs = 0;
558 spin_unlock_irqrestore(&dev->spinlock, flags);
559 for (i = 0; i < nbufs; i++)
560 vfree(dev->sio_bufs[i].buffer);
561 kfree(dev->sio_bufs);
562 dev->sio_bufs = NULL;
563 return 0;
564 }
565
566 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
567 {
568 int i;
569 if (dev->sio_bufs != NULL)
570 pr_err("sio_bufs already allocated\n");
571 else {
572 dev->sio_bufs = kcalloc(n_sbufs,
573 sizeof(struct stk_sio_buffer),
574 GFP_KERNEL);
575 if (dev->sio_bufs == NULL)
576 return -ENOMEM;
577 for (i = 0; i < n_sbufs; i++) {
578 if (stk_setup_siobuf(dev, i))
579 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
580 dev->n_sbufs = i+1;
581 }
582 }
583 return 0;
584 }
585
586 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
587 {
588 int err;
589 err = stk_prepare_iso(dev);
590 if (err) {
591 stk_clean_iso(dev);
592 return err;
593 }
594 err = stk_prepare_sio_buffers(dev, n_sbufs);
595 if (err) {
596 stk_free_sio_buffers(dev);
597 return err;
598 }
599 return 0;
600 }
601
602 static void stk_free_buffers(struct stk_camera *dev)
603 {
604 stk_clean_iso(dev);
605 stk_free_sio_buffers(dev);
606 }
607
608
609
610
611 static int v4l_stk_open(struct file *fp)
612 {
613 struct stk_camera *dev = video_drvdata(fp);
614 int err;
615
616 if (dev == NULL || !is_present(dev))
617 return -ENXIO;
618
619 if (mutex_lock_interruptible(&dev->lock))
620 return -ERESTARTSYS;
621 if (!dev->first_init)
622 stk_camera_write_reg(dev, 0x0, 0x24);
623 else
624 dev->first_init = 0;
625
626 err = v4l2_fh_open(fp);
627 if (!err)
628 usb_autopm_get_interface(dev->interface);
629 mutex_unlock(&dev->lock);
630 return err;
631 }
632
633 static int v4l_stk_release(struct file *fp)
634 {
635 struct stk_camera *dev = video_drvdata(fp);
636
637 mutex_lock(&dev->lock);
638 if (dev->owner == fp) {
639 stk_stop_stream(dev);
640 stk_free_buffers(dev);
641 stk_camera_write_reg(dev, 0x0, 0x49);
642 unset_initialised(dev);
643 dev->owner = NULL;
644 }
645
646 usb_autopm_put_interface(dev->interface);
647 mutex_unlock(&dev->lock);
648 return v4l2_fh_release(fp);
649 }
650
651 static ssize_t stk_read(struct file *fp, char __user *buf,
652 size_t count, loff_t *f_pos)
653 {
654 int i;
655 int ret;
656 unsigned long flags;
657 struct stk_sio_buffer *sbuf;
658 struct stk_camera *dev = video_drvdata(fp);
659
660 if (!is_present(dev))
661 return -EIO;
662 if (dev->owner && (!dev->reading || dev->owner != fp))
663 return -EBUSY;
664 dev->owner = fp;
665 if (!is_streaming(dev)) {
666 if (stk_initialise(dev)
667 || stk_allocate_buffers(dev, 3)
668 || stk_start_stream(dev))
669 return -ENOMEM;
670 dev->reading = 1;
671 spin_lock_irqsave(&dev->spinlock, flags);
672 for (i = 0; i < dev->n_sbufs; i++) {
673 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
674 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
675 }
676 spin_unlock_irqrestore(&dev->spinlock, flags);
677 }
678 if (*f_pos == 0) {
679 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
680 return -EWOULDBLOCK;
681 ret = wait_event_interruptible(dev->wait_frame,
682 !list_empty(&dev->sio_full) || !is_present(dev));
683 if (ret)
684 return ret;
685 if (!is_present(dev))
686 return -EIO;
687 }
688 if (count + *f_pos > dev->frame_size)
689 count = dev->frame_size - *f_pos;
690 spin_lock_irqsave(&dev->spinlock, flags);
691 if (list_empty(&dev->sio_full)) {
692 spin_unlock_irqrestore(&dev->spinlock, flags);
693 pr_err("BUG: No siobufs ready\n");
694 return 0;
695 }
696 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
697 spin_unlock_irqrestore(&dev->spinlock, flags);
698
699 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
700 return -EFAULT;
701
702 *f_pos += count;
703
704 if (*f_pos >= dev->frame_size) {
705 *f_pos = 0;
706 spin_lock_irqsave(&dev->spinlock, flags);
707 list_move_tail(&sbuf->list, &dev->sio_avail);
708 spin_unlock_irqrestore(&dev->spinlock, flags);
709 }
710 return count;
711 }
712
713 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
714 size_t count, loff_t *f_pos)
715 {
716 struct stk_camera *dev = video_drvdata(fp);
717 int ret;
718
719 if (mutex_lock_interruptible(&dev->lock))
720 return -ERESTARTSYS;
721 ret = stk_read(fp, buf, count, f_pos);
722 mutex_unlock(&dev->lock);
723 return ret;
724 }
725
726 static __poll_t v4l_stk_poll(struct file *fp, poll_table *wait)
727 {
728 struct stk_camera *dev = video_drvdata(fp);
729 __poll_t res = v4l2_ctrl_poll(fp, wait);
730
731 poll_wait(fp, &dev->wait_frame, wait);
732
733 if (!is_present(dev))
734 return EPOLLERR;
735
736 if (!list_empty(&dev->sio_full))
737 return res | EPOLLIN | EPOLLRDNORM;
738
739 return res;
740 }
741
742
743 static void stk_v4l_vm_open(struct vm_area_struct *vma)
744 {
745 struct stk_sio_buffer *sbuf = vma->vm_private_data;
746 sbuf->mapcount++;
747 }
748 static void stk_v4l_vm_close(struct vm_area_struct *vma)
749 {
750 struct stk_sio_buffer *sbuf = vma->vm_private_data;
751 sbuf->mapcount--;
752 if (sbuf->mapcount == 0)
753 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
754 }
755 static const struct vm_operations_struct stk_v4l_vm_ops = {
756 .open = stk_v4l_vm_open,
757 .close = stk_v4l_vm_close
758 };
759
760 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
761 {
762 unsigned int i;
763 int ret;
764 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
765 struct stk_camera *dev = video_drvdata(fp);
766 struct stk_sio_buffer *sbuf = NULL;
767
768 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
769 return -EINVAL;
770
771 for (i = 0; i < dev->n_sbufs; i++) {
772 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
773 sbuf = dev->sio_bufs + i;
774 break;
775 }
776 }
777 if (sbuf == NULL)
778 return -EINVAL;
779 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
780 if (ret)
781 return ret;
782 vma->vm_flags |= VM_DONTEXPAND;
783 vma->vm_private_data = sbuf;
784 vma->vm_ops = &stk_v4l_vm_ops;
785 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
786 stk_v4l_vm_open(vma);
787 return 0;
788 }
789
790
791
792 static int stk_vidioc_querycap(struct file *filp,
793 void *priv, struct v4l2_capability *cap)
794 {
795 struct stk_camera *dev = video_drvdata(filp);
796
797 strscpy(cap->driver, "stk", sizeof(cap->driver));
798 strscpy(cap->card, "stk", sizeof(cap->card));
799 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
800 return 0;
801 }
802
803 static int stk_vidioc_enum_input(struct file *filp,
804 void *priv, struct v4l2_input *input)
805 {
806 if (input->index != 0)
807 return -EINVAL;
808
809 strscpy(input->name, "Syntek USB Camera", sizeof(input->name));
810 input->type = V4L2_INPUT_TYPE_CAMERA;
811 return 0;
812 }
813
814
815 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
816 {
817 *i = 0;
818 return 0;
819 }
820
821 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
822 {
823 return i ? -EINVAL : 0;
824 }
825
826 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
827 {
828 struct stk_camera *dev =
829 container_of(ctrl->handler, struct stk_camera, hdl);
830
831 switch (ctrl->id) {
832 case V4L2_CID_BRIGHTNESS:
833 return stk_sensor_set_brightness(dev, ctrl->val);
834 case V4L2_CID_HFLIP:
835 if (dmi_check_system(stk_upside_down_dmi_table))
836 dev->vsettings.hflip = !ctrl->val;
837 else
838 dev->vsettings.hflip = ctrl->val;
839 return 0;
840 case V4L2_CID_VFLIP:
841 if (dmi_check_system(stk_upside_down_dmi_table))
842 dev->vsettings.vflip = !ctrl->val;
843 else
844 dev->vsettings.vflip = ctrl->val;
845 return 0;
846 default:
847 return -EINVAL;
848 }
849 return 0;
850 }
851
852
853 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
854 void *priv, struct v4l2_fmtdesc *fmtd)
855 {
856 switch (fmtd->index) {
857 case 0:
858 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
859 break;
860 case 1:
861 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
862 break;
863 case 2:
864 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
865 break;
866 case 3:
867 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
868 break;
869 case 4:
870 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
871 break;
872 default:
873 return -EINVAL;
874 }
875 return 0;
876 }
877
878 static struct stk_size {
879 unsigned w;
880 unsigned h;
881 enum stk_mode m;
882 } stk_sizes[] = {
883 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
884 { .w = 640, .h = 480, .m = MODE_VGA, },
885 { .w = 352, .h = 288, .m = MODE_CIF, },
886 { .w = 320, .h = 240, .m = MODE_QVGA, },
887 { .w = 176, .h = 144, .m = MODE_QCIF, },
888 };
889
890 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
891 void *priv, struct v4l2_format *f)
892 {
893 struct v4l2_pix_format *pix_format = &f->fmt.pix;
894 struct stk_camera *dev = video_drvdata(filp);
895 int i;
896
897 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
898 stk_sizes[i].m != dev->vsettings.mode; i++)
899 ;
900 if (i == ARRAY_SIZE(stk_sizes)) {
901 pr_err("ERROR: mode invalid\n");
902 return -EINVAL;
903 }
904 pix_format->width = stk_sizes[i].w;
905 pix_format->height = stk_sizes[i].h;
906 pix_format->field = V4L2_FIELD_NONE;
907 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
908 pix_format->pixelformat = dev->vsettings.palette;
909 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
910 pix_format->bytesperline = pix_format->width;
911 else
912 pix_format->bytesperline = 2 * pix_format->width;
913 pix_format->sizeimage = pix_format->bytesperline
914 * pix_format->height;
915 return 0;
916 }
917
918 static int stk_try_fmt_vid_cap(struct file *filp,
919 struct v4l2_format *fmtd, int *idx)
920 {
921 int i;
922 switch (fmtd->fmt.pix.pixelformat) {
923 case V4L2_PIX_FMT_RGB565:
924 case V4L2_PIX_FMT_RGB565X:
925 case V4L2_PIX_FMT_UYVY:
926 case V4L2_PIX_FMT_YUYV:
927 case V4L2_PIX_FMT_SBGGR8:
928 break;
929 default:
930 return -EINVAL;
931 }
932 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
933 if (fmtd->fmt.pix.width > stk_sizes[i].w)
934 break;
935 }
936 if (i == ARRAY_SIZE(stk_sizes)
937 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
938 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
939 fmtd->fmt.pix.height = stk_sizes[i-1].h;
940 fmtd->fmt.pix.width = stk_sizes[i-1].w;
941 if (idx)
942 *idx = i - 1;
943 } else {
944 fmtd->fmt.pix.height = stk_sizes[i].h;
945 fmtd->fmt.pix.width = stk_sizes[i].w;
946 if (idx)
947 *idx = i;
948 }
949
950 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
951 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
952 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
953 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
954 else
955 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
956 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
957 * fmtd->fmt.pix.height;
958 return 0;
959 }
960
961 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
962 void *priv, struct v4l2_format *fmtd)
963 {
964 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
965 }
966
967 static int stk_setup_format(struct stk_camera *dev)
968 {
969 int i = 0;
970 int depth;
971 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
972 depth = 1;
973 else
974 depth = 2;
975 while (i < ARRAY_SIZE(stk_sizes) &&
976 stk_sizes[i].m != dev->vsettings.mode)
977 i++;
978 if (i == ARRAY_SIZE(stk_sizes)) {
979 pr_err("Something is broken in %s\n", __func__);
980 return -EFAULT;
981 }
982
983 stk_camera_write_reg(dev, 0x001b, 0x0e);
984 if (dev->vsettings.mode == MODE_SXGA)
985 stk_camera_write_reg(dev, 0x001c, 0x0e);
986 else
987 stk_camera_write_reg(dev, 0x001c, 0x46);
988
989
990
991
992 stk_camera_write_reg(dev, 0x0115,
993 ((stk_sizes[i].w * depth) >> 8) & 0xff);
994 stk_camera_write_reg(dev, 0x0114,
995 (stk_sizes[i].w * depth) & 0xff);
996 stk_camera_write_reg(dev, 0x0117,
997 (stk_sizes[i].h >> 8) & 0xff);
998 stk_camera_write_reg(dev, 0x0116,
999 stk_sizes[i].h & 0xff);
1000 return stk_sensor_configure(dev);
1001 }
1002
1003 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1004 void *priv, struct v4l2_format *fmtd)
1005 {
1006 int ret;
1007 int idx;
1008 struct stk_camera *dev = video_drvdata(filp);
1009
1010 if (dev == NULL)
1011 return -ENODEV;
1012 if (!is_present(dev))
1013 return -ENODEV;
1014 if (is_streaming(dev))
1015 return -EBUSY;
1016 if (dev->owner)
1017 return -EBUSY;
1018 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1019 if (ret)
1020 return ret;
1021
1022 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1023 stk_free_buffers(dev);
1024 dev->frame_size = fmtd->fmt.pix.sizeimage;
1025 dev->vsettings.mode = stk_sizes[idx].m;
1026
1027 stk_initialise(dev);
1028 return stk_setup_format(dev);
1029 }
1030
1031 static int stk_vidioc_reqbufs(struct file *filp,
1032 void *priv, struct v4l2_requestbuffers *rb)
1033 {
1034 struct stk_camera *dev = video_drvdata(filp);
1035
1036 if (dev == NULL)
1037 return -ENODEV;
1038 if (rb->memory != V4L2_MEMORY_MMAP)
1039 return -EINVAL;
1040 if (is_streaming(dev)
1041 || (dev->owner && dev->owner != filp))
1042 return -EBUSY;
1043 stk_free_buffers(dev);
1044 if (rb->count == 0) {
1045 stk_camera_write_reg(dev, 0x0, 0x49);
1046 unset_initialised(dev);
1047 dev->owner = NULL;
1048 return 0;
1049 }
1050 dev->owner = filp;
1051
1052
1053 if (rb->count < 3)
1054 rb->count = 3;
1055
1056 else if (rb->count > 5)
1057 rb->count = 5;
1058
1059 stk_allocate_buffers(dev, rb->count);
1060 rb->count = dev->n_sbufs;
1061 return 0;
1062 }
1063
1064 static int stk_vidioc_querybuf(struct file *filp,
1065 void *priv, struct v4l2_buffer *buf)
1066 {
1067 struct stk_camera *dev = video_drvdata(filp);
1068 struct stk_sio_buffer *sbuf;
1069
1070 if (buf->index >= dev->n_sbufs)
1071 return -EINVAL;
1072 sbuf = dev->sio_bufs + buf->index;
1073 *buf = sbuf->v4lbuf;
1074 return 0;
1075 }
1076
1077 static int stk_vidioc_qbuf(struct file *filp,
1078 void *priv, struct v4l2_buffer *buf)
1079 {
1080 struct stk_camera *dev = video_drvdata(filp);
1081 struct stk_sio_buffer *sbuf;
1082 unsigned long flags;
1083
1084 if (buf->memory != V4L2_MEMORY_MMAP)
1085 return -EINVAL;
1086
1087 if (buf->index >= dev->n_sbufs)
1088 return -EINVAL;
1089 sbuf = dev->sio_bufs + buf->index;
1090 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1091 return 0;
1092 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1093 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1094 spin_lock_irqsave(&dev->spinlock, flags);
1095 list_add_tail(&sbuf->list, &dev->sio_avail);
1096 *buf = sbuf->v4lbuf;
1097 spin_unlock_irqrestore(&dev->spinlock, flags);
1098 return 0;
1099 }
1100
1101 static int stk_vidioc_dqbuf(struct file *filp,
1102 void *priv, struct v4l2_buffer *buf)
1103 {
1104 struct stk_camera *dev = video_drvdata(filp);
1105 struct stk_sio_buffer *sbuf;
1106 unsigned long flags;
1107 int ret;
1108
1109 if (!is_streaming(dev))
1110 return -EINVAL;
1111
1112 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1113 return -EWOULDBLOCK;
1114 ret = wait_event_interruptible(dev->wait_frame,
1115 !list_empty(&dev->sio_full) || !is_present(dev));
1116 if (ret)
1117 return ret;
1118 if (!is_present(dev))
1119 return -EIO;
1120
1121 spin_lock_irqsave(&dev->spinlock, flags);
1122 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1123 list_del_init(&sbuf->list);
1124 spin_unlock_irqrestore(&dev->spinlock, flags);
1125 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1126 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1127 sbuf->v4lbuf.sequence = ++dev->sequence;
1128 sbuf->v4lbuf.timestamp = ns_to_timeval(ktime_get_ns());
1129
1130 *buf = sbuf->v4lbuf;
1131 return 0;
1132 }
1133
1134 static int stk_vidioc_streamon(struct file *filp,
1135 void *priv, enum v4l2_buf_type type)
1136 {
1137 struct stk_camera *dev = video_drvdata(filp);
1138 if (is_streaming(dev))
1139 return 0;
1140 if (dev->sio_bufs == NULL)
1141 return -EINVAL;
1142 dev->sequence = 0;
1143 return stk_start_stream(dev);
1144 }
1145
1146 static int stk_vidioc_streamoff(struct file *filp,
1147 void *priv, enum v4l2_buf_type type)
1148 {
1149 struct stk_camera *dev = video_drvdata(filp);
1150 unsigned long flags;
1151 int i;
1152 stk_stop_stream(dev);
1153 spin_lock_irqsave(&dev->spinlock, flags);
1154 INIT_LIST_HEAD(&dev->sio_avail);
1155 INIT_LIST_HEAD(&dev->sio_full);
1156 for (i = 0; i < dev->n_sbufs; i++) {
1157 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1158 dev->sio_bufs[i].v4lbuf.flags = 0;
1159 }
1160 spin_unlock_irqrestore(&dev->spinlock, flags);
1161 return 0;
1162 }
1163
1164
1165 static int stk_vidioc_g_parm(struct file *filp,
1166 void *priv, struct v4l2_streamparm *sp)
1167 {
1168
1169 sp->parm.capture.timeperframe.numerator = 1;
1170 sp->parm.capture.timeperframe.denominator = 30;
1171 sp->parm.capture.readbuffers = 2;
1172 return 0;
1173 }
1174
1175 static int stk_vidioc_enum_framesizes(struct file *filp,
1176 void *priv, struct v4l2_frmsizeenum *frms)
1177 {
1178 if (frms->index >= ARRAY_SIZE(stk_sizes))
1179 return -EINVAL;
1180 switch (frms->pixel_format) {
1181 case V4L2_PIX_FMT_RGB565:
1182 case V4L2_PIX_FMT_RGB565X:
1183 case V4L2_PIX_FMT_UYVY:
1184 case V4L2_PIX_FMT_YUYV:
1185 case V4L2_PIX_FMT_SBGGR8:
1186 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1187 frms->discrete.width = stk_sizes[frms->index].w;
1188 frms->discrete.height = stk_sizes[frms->index].h;
1189 return 0;
1190 default: return -EINVAL;
1191 }
1192 }
1193
1194 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1195 .s_ctrl = stk_s_ctrl,
1196 };
1197
1198 static const struct v4l2_file_operations v4l_stk_fops = {
1199 .owner = THIS_MODULE,
1200 .open = v4l_stk_open,
1201 .release = v4l_stk_release,
1202 .read = v4l_stk_read,
1203 .poll = v4l_stk_poll,
1204 .mmap = v4l_stk_mmap,
1205 .unlocked_ioctl = video_ioctl2,
1206 };
1207
1208 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1209 .vidioc_querycap = stk_vidioc_querycap,
1210 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1211 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1212 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1213 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1214 .vidioc_enum_input = stk_vidioc_enum_input,
1215 .vidioc_s_input = stk_vidioc_s_input,
1216 .vidioc_g_input = stk_vidioc_g_input,
1217 .vidioc_reqbufs = stk_vidioc_reqbufs,
1218 .vidioc_querybuf = stk_vidioc_querybuf,
1219 .vidioc_qbuf = stk_vidioc_qbuf,
1220 .vidioc_dqbuf = stk_vidioc_dqbuf,
1221 .vidioc_streamon = stk_vidioc_streamon,
1222 .vidioc_streamoff = stk_vidioc_streamoff,
1223 .vidioc_g_parm = stk_vidioc_g_parm,
1224 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1225 .vidioc_log_status = v4l2_ctrl_log_status,
1226 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1227 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1228 };
1229
1230 static void stk_v4l_dev_release(struct video_device *vd)
1231 {
1232 struct stk_camera *dev = vdev_to_camera(vd);
1233
1234 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1235 pr_err("We are leaking memory\n");
1236 usb_put_intf(dev->interface);
1237 }
1238
1239 static const struct video_device stk_v4l_data = {
1240 .name = "stkwebcam",
1241 .fops = &v4l_stk_fops,
1242 .ioctl_ops = &v4l_stk_ioctl_ops,
1243 .release = stk_v4l_dev_release,
1244 };
1245
1246
1247 static int stk_register_video_device(struct stk_camera *dev)
1248 {
1249 int err;
1250
1251 dev->vdev = stk_v4l_data;
1252 dev->vdev.lock = &dev->lock;
1253 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1254 dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1255 V4L2_CAP_STREAMING;
1256 video_set_drvdata(&dev->vdev, dev);
1257 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1258 if (err)
1259 pr_err("v4l registration failed\n");
1260 else
1261 pr_info("Syntek USB2.0 Camera is now controlling device %s\n",
1262 video_device_node_name(&dev->vdev));
1263 return err;
1264 }
1265
1266
1267
1268
1269 static int stk_camera_probe(struct usb_interface *interface,
1270 const struct usb_device_id *id)
1271 {
1272 struct v4l2_ctrl_handler *hdl;
1273 int err = 0;
1274 int i;
1275
1276 struct stk_camera *dev = NULL;
1277 struct usb_device *udev = interface_to_usbdev(interface);
1278 struct usb_host_interface *iface_desc;
1279 struct usb_endpoint_descriptor *endpoint;
1280
1281 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1282 if (dev == NULL) {
1283 pr_err("Out of memory !\n");
1284 return -ENOMEM;
1285 }
1286 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1287 if (err < 0) {
1288 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1289 kfree(dev);
1290 return err;
1291 }
1292 hdl = &dev->hdl;
1293 v4l2_ctrl_handler_init(hdl, 3);
1294 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1295 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1296 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1297 V4L2_CID_HFLIP, 0, 1, 1, 1);
1298 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1299 V4L2_CID_VFLIP, 0, 1, 1, 1);
1300 if (hdl->error) {
1301 err = hdl->error;
1302 dev_err(&udev->dev, "couldn't register control\n");
1303 goto error;
1304 }
1305 dev->v4l2_dev.ctrl_handler = hdl;
1306
1307 spin_lock_init(&dev->spinlock);
1308 mutex_init(&dev->lock);
1309 init_waitqueue_head(&dev->wait_frame);
1310 dev->first_init = 1;
1311
1312 dev->udev = udev;
1313 dev->interface = interface;
1314 usb_get_intf(interface);
1315
1316 if (hflip != -1)
1317 dev->vsettings.hflip = hflip;
1318 else if (dmi_check_system(stk_upside_down_dmi_table))
1319 dev->vsettings.hflip = 1;
1320 else
1321 dev->vsettings.hflip = 0;
1322 if (vflip != -1)
1323 dev->vsettings.vflip = vflip;
1324 else if (dmi_check_system(stk_upside_down_dmi_table))
1325 dev->vsettings.vflip = 1;
1326 else
1327 dev->vsettings.vflip = 0;
1328 dev->n_sbufs = 0;
1329 set_present(dev);
1330
1331
1332
1333
1334 iface_desc = interface->cur_altsetting;
1335
1336 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1337 endpoint = &iface_desc->endpoint[i].desc;
1338
1339 if (!dev->isoc_ep
1340 && usb_endpoint_is_isoc_in(endpoint)) {
1341
1342 dev->isoc_ep = usb_endpoint_num(endpoint);
1343 break;
1344 }
1345 }
1346 if (!dev->isoc_ep) {
1347 pr_err("Could not find isoc-in endpoint\n");
1348 err = -ENODEV;
1349 goto error;
1350 }
1351 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1352 dev->vsettings.mode = MODE_VGA;
1353 dev->frame_size = 640 * 480 * 2;
1354
1355 INIT_LIST_HEAD(&dev->sio_avail);
1356 INIT_LIST_HEAD(&dev->sio_full);
1357
1358 usb_set_intfdata(interface, dev);
1359
1360 err = stk_register_video_device(dev);
1361 if (err)
1362 goto error;
1363
1364 return 0;
1365
1366 error:
1367 v4l2_ctrl_handler_free(hdl);
1368 v4l2_device_unregister(&dev->v4l2_dev);
1369 kfree(dev);
1370 return err;
1371 }
1372
1373 static void stk_camera_disconnect(struct usb_interface *interface)
1374 {
1375 struct stk_camera *dev = usb_get_intfdata(interface);
1376
1377 usb_set_intfdata(interface, NULL);
1378 unset_present(dev);
1379
1380 wake_up_interruptible(&dev->wait_frame);
1381
1382 pr_info("Syntek USB2.0 Camera release resources device %s\n",
1383 video_device_node_name(&dev->vdev));
1384
1385 video_unregister_device(&dev->vdev);
1386 v4l2_ctrl_handler_free(&dev->hdl);
1387 v4l2_device_unregister(&dev->v4l2_dev);
1388 kfree(dev);
1389 }
1390
1391 #ifdef CONFIG_PM
1392 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1393 {
1394 struct stk_camera *dev = usb_get_intfdata(intf);
1395 if (is_streaming(dev)) {
1396 stk_stop_stream(dev);
1397
1398 set_streaming(dev);
1399 }
1400 return 0;
1401 }
1402
1403 static int stk_camera_resume(struct usb_interface *intf)
1404 {
1405 struct stk_camera *dev = usb_get_intfdata(intf);
1406 if (!is_initialised(dev))
1407 return 0;
1408 unset_initialised(dev);
1409 stk_initialise(dev);
1410 stk_camera_write_reg(dev, 0x0, 0x49);
1411 stk_setup_format(dev);
1412 if (is_streaming(dev))
1413 stk_start_stream(dev);
1414 return 0;
1415 }
1416 #endif
1417
1418 static struct usb_driver stk_camera_driver = {
1419 .name = "stkwebcam",
1420 .probe = stk_camera_probe,
1421 .disconnect = stk_camera_disconnect,
1422 .id_table = stkwebcam_table,
1423 #ifdef CONFIG_PM
1424 .suspend = stk_camera_suspend,
1425 .resume = stk_camera_resume,
1426 #endif
1427 };
1428
1429 module_usb_driver(stk_camera_driver);