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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
32static int hflip = -1;
33module_param(hflip, int, 0444);
34MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
35
36static int vflip = -1;
37module_param(vflip, int, 0444);
38MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
39
40static int debug;
41module_param(debug, int, 0444);
42MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
43
44MODULE_LICENSE("GPL");
45MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
46MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
47
48
49static 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};
54MODULE_DEVICE_TABLE(usb, stkwebcam_table);
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89static 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
124int 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
143int 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
172static 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
215static 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
239
240
241
242
243
244
245
246static 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
276static 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
298
299
300
301
302
303
304static 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;
358
359
360
361
362
363
364
365
366
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
413resubmit:
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
425static 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
484isobufs_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
494static 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
517static 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
536static 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
566static 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
586static 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
602static 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
611static 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
633static 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 if (is_present(dev))
647 usb_autopm_put_interface(dev->interface);
648 mutex_unlock(&dev->lock);
649 return v4l2_fh_release(fp);
650}
651
652static ssize_t stk_read(struct file *fp, char __user *buf,
653 size_t count, loff_t *f_pos)
654{
655 int i;
656 int ret;
657 unsigned long flags;
658 struct stk_sio_buffer *sbuf;
659 struct stk_camera *dev = video_drvdata(fp);
660
661 if (!is_present(dev))
662 return -EIO;
663 if (dev->owner && (!dev->reading || dev->owner != fp))
664 return -EBUSY;
665 dev->owner = fp;
666 if (!is_streaming(dev)) {
667 if (stk_initialise(dev)
668 || stk_allocate_buffers(dev, 3)
669 || stk_start_stream(dev))
670 return -ENOMEM;
671 dev->reading = 1;
672 spin_lock_irqsave(&dev->spinlock, flags);
673 for (i = 0; i < dev->n_sbufs; i++) {
674 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
675 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
676 }
677 spin_unlock_irqrestore(&dev->spinlock, flags);
678 }
679 if (*f_pos == 0) {
680 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
681 return -EWOULDBLOCK;
682 ret = wait_event_interruptible(dev->wait_frame,
683 !list_empty(&dev->sio_full) || !is_present(dev));
684 if (ret)
685 return ret;
686 if (!is_present(dev))
687 return -EIO;
688 }
689 if (count + *f_pos > dev->frame_size)
690 count = dev->frame_size - *f_pos;
691 spin_lock_irqsave(&dev->spinlock, flags);
692 if (list_empty(&dev->sio_full)) {
693 spin_unlock_irqrestore(&dev->spinlock, flags);
694 pr_err("BUG: No siobufs ready\n");
695 return 0;
696 }
697 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
698 spin_unlock_irqrestore(&dev->spinlock, flags);
699
700 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
701 return -EFAULT;
702
703 *f_pos += count;
704
705 if (*f_pos >= dev->frame_size) {
706 *f_pos = 0;
707 spin_lock_irqsave(&dev->spinlock, flags);
708 list_move_tail(&sbuf->list, &dev->sio_avail);
709 spin_unlock_irqrestore(&dev->spinlock, flags);
710 }
711 return count;
712}
713
714static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
715 size_t count, loff_t *f_pos)
716{
717 struct stk_camera *dev = video_drvdata(fp);
718 int ret;
719
720 if (mutex_lock_interruptible(&dev->lock))
721 return -ERESTARTSYS;
722 ret = stk_read(fp, buf, count, f_pos);
723 mutex_unlock(&dev->lock);
724 return ret;
725}
726
727static __poll_t v4l_stk_poll(struct file *fp, poll_table *wait)
728{
729 struct stk_camera *dev = video_drvdata(fp);
730 __poll_t res = v4l2_ctrl_poll(fp, wait);
731
732 poll_wait(fp, &dev->wait_frame, wait);
733
734 if (!is_present(dev))
735 return EPOLLERR;
736
737 if (!list_empty(&dev->sio_full))
738 return res | EPOLLIN | EPOLLRDNORM;
739
740 return res;
741}
742
743
744static void stk_v4l_vm_open(struct vm_area_struct *vma)
745{
746 struct stk_sio_buffer *sbuf = vma->vm_private_data;
747 sbuf->mapcount++;
748}
749static void stk_v4l_vm_close(struct vm_area_struct *vma)
750{
751 struct stk_sio_buffer *sbuf = vma->vm_private_data;
752 sbuf->mapcount--;
753 if (sbuf->mapcount == 0)
754 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
755}
756static const struct vm_operations_struct stk_v4l_vm_ops = {
757 .open = stk_v4l_vm_open,
758 .close = stk_v4l_vm_close
759};
760
761static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
762{
763 unsigned int i;
764 int ret;
765 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
766 struct stk_camera *dev = video_drvdata(fp);
767 struct stk_sio_buffer *sbuf = NULL;
768
769 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
770 return -EINVAL;
771
772 for (i = 0; i < dev->n_sbufs; i++) {
773 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
774 sbuf = dev->sio_bufs + i;
775 break;
776 }
777 }
778 if (sbuf == NULL)
779 return -EINVAL;
780 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
781 if (ret)
782 return ret;
783 vma->vm_flags |= VM_DONTEXPAND;
784 vma->vm_private_data = sbuf;
785 vma->vm_ops = &stk_v4l_vm_ops;
786 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
787 stk_v4l_vm_open(vma);
788 return 0;
789}
790
791
792
793static int stk_vidioc_querycap(struct file *filp,
794 void *priv, struct v4l2_capability *cap)
795{
796 struct stk_camera *dev = video_drvdata(filp);
797
798 strscpy(cap->driver, "stk", sizeof(cap->driver));
799 strscpy(cap->card, "stk", sizeof(cap->card));
800 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
801 return 0;
802}
803
804static int stk_vidioc_enum_input(struct file *filp,
805 void *priv, struct v4l2_input *input)
806{
807 if (input->index != 0)
808 return -EINVAL;
809
810 strscpy(input->name, "Syntek USB Camera", sizeof(input->name));
811 input->type = V4L2_INPUT_TYPE_CAMERA;
812 return 0;
813}
814
815
816static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
817{
818 *i = 0;
819 return 0;
820}
821
822static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
823{
824 return i ? -EINVAL : 0;
825}
826
827static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
828{
829 struct stk_camera *dev =
830 container_of(ctrl->handler, struct stk_camera, hdl);
831
832 switch (ctrl->id) {
833 case V4L2_CID_BRIGHTNESS:
834 return stk_sensor_set_brightness(dev, ctrl->val);
835 case V4L2_CID_HFLIP:
836 if (dmi_check_system(stk_upside_down_dmi_table))
837 dev->vsettings.hflip = !ctrl->val;
838 else
839 dev->vsettings.hflip = ctrl->val;
840 return 0;
841 case V4L2_CID_VFLIP:
842 if (dmi_check_system(stk_upside_down_dmi_table))
843 dev->vsettings.vflip = !ctrl->val;
844 else
845 dev->vsettings.vflip = ctrl->val;
846 return 0;
847 default:
848 return -EINVAL;
849 }
850 return 0;
851}
852
853
854static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
855 void *priv, struct v4l2_fmtdesc *fmtd)
856{
857 switch (fmtd->index) {
858 case 0:
859 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
860 strscpy(fmtd->description, "r5g6b5", sizeof(fmtd->description));
861 break;
862 case 1:
863 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
864 strscpy(fmtd->description, "r5g6b5BE", sizeof(fmtd->description));
865 break;
866 case 2:
867 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
868 strscpy(fmtd->description, "yuv4:2:2", sizeof(fmtd->description));
869 break;
870 case 3:
871 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
872 strscpy(fmtd->description, "Raw bayer", sizeof(fmtd->description));
873 break;
874 case 4:
875 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
876 strscpy(fmtd->description, "yuv4:2:2", sizeof(fmtd->description));
877 break;
878 default:
879 return -EINVAL;
880 }
881 return 0;
882}
883
884static struct stk_size {
885 unsigned w;
886 unsigned h;
887 enum stk_mode m;
888} stk_sizes[] = {
889 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
890 { .w = 640, .h = 480, .m = MODE_VGA, },
891 { .w = 352, .h = 288, .m = MODE_CIF, },
892 { .w = 320, .h = 240, .m = MODE_QVGA, },
893 { .w = 176, .h = 144, .m = MODE_QCIF, },
894};
895
896static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
897 void *priv, struct v4l2_format *f)
898{
899 struct v4l2_pix_format *pix_format = &f->fmt.pix;
900 struct stk_camera *dev = video_drvdata(filp);
901 int i;
902
903 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
904 stk_sizes[i].m != dev->vsettings.mode; i++)
905 ;
906 if (i == ARRAY_SIZE(stk_sizes)) {
907 pr_err("ERROR: mode invalid\n");
908 return -EINVAL;
909 }
910 pix_format->width = stk_sizes[i].w;
911 pix_format->height = stk_sizes[i].h;
912 pix_format->field = V4L2_FIELD_NONE;
913 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
914 pix_format->pixelformat = dev->vsettings.palette;
915 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
916 pix_format->bytesperline = pix_format->width;
917 else
918 pix_format->bytesperline = 2 * pix_format->width;
919 pix_format->sizeimage = pix_format->bytesperline
920 * pix_format->height;
921 return 0;
922}
923
924static int stk_try_fmt_vid_cap(struct file *filp,
925 struct v4l2_format *fmtd, int *idx)
926{
927 int i;
928 switch (fmtd->fmt.pix.pixelformat) {
929 case V4L2_PIX_FMT_RGB565:
930 case V4L2_PIX_FMT_RGB565X:
931 case V4L2_PIX_FMT_UYVY:
932 case V4L2_PIX_FMT_YUYV:
933 case V4L2_PIX_FMT_SBGGR8:
934 break;
935 default:
936 return -EINVAL;
937 }
938 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
939 if (fmtd->fmt.pix.width > stk_sizes[i].w)
940 break;
941 }
942 if (i == ARRAY_SIZE(stk_sizes)
943 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
944 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
945 fmtd->fmt.pix.height = stk_sizes[i-1].h;
946 fmtd->fmt.pix.width = stk_sizes[i-1].w;
947 if (idx)
948 *idx = i - 1;
949 } else {
950 fmtd->fmt.pix.height = stk_sizes[i].h;
951 fmtd->fmt.pix.width = stk_sizes[i].w;
952 if (idx)
953 *idx = i;
954 }
955
956 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
957 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
958 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
959 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
960 else
961 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
962 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
963 * fmtd->fmt.pix.height;
964 return 0;
965}
966
967static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
968 void *priv, struct v4l2_format *fmtd)
969{
970 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
971}
972
973static int stk_setup_format(struct stk_camera *dev)
974{
975 int i = 0;
976 int depth;
977 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
978 depth = 1;
979 else
980 depth = 2;
981 while (i < ARRAY_SIZE(stk_sizes) &&
982 stk_sizes[i].m != dev->vsettings.mode)
983 i++;
984 if (i == ARRAY_SIZE(stk_sizes)) {
985 pr_err("Something is broken in %s\n", __func__);
986 return -EFAULT;
987 }
988
989 stk_camera_write_reg(dev, 0x001b, 0x0e);
990 if (dev->vsettings.mode == MODE_SXGA)
991 stk_camera_write_reg(dev, 0x001c, 0x0e);
992 else
993 stk_camera_write_reg(dev, 0x001c, 0x46);
994
995
996
997
998 stk_camera_write_reg(dev, 0x0115,
999 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1000 stk_camera_write_reg(dev, 0x0114,
1001 (stk_sizes[i].w * depth) & 0xff);
1002 stk_camera_write_reg(dev, 0x0117,
1003 (stk_sizes[i].h >> 8) & 0xff);
1004 stk_camera_write_reg(dev, 0x0116,
1005 stk_sizes[i].h & 0xff);
1006 return stk_sensor_configure(dev);
1007}
1008
1009static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1010 void *priv, struct v4l2_format *fmtd)
1011{
1012 int ret;
1013 int idx;
1014 struct stk_camera *dev = video_drvdata(filp);
1015
1016 if (dev == NULL)
1017 return -ENODEV;
1018 if (!is_present(dev))
1019 return -ENODEV;
1020 if (is_streaming(dev))
1021 return -EBUSY;
1022 if (dev->owner)
1023 return -EBUSY;
1024 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1025 if (ret)
1026 return ret;
1027
1028 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1029 stk_free_buffers(dev);
1030 dev->frame_size = fmtd->fmt.pix.sizeimage;
1031 dev->vsettings.mode = stk_sizes[idx].m;
1032
1033 stk_initialise(dev);
1034 return stk_setup_format(dev);
1035}
1036
1037static int stk_vidioc_reqbufs(struct file *filp,
1038 void *priv, struct v4l2_requestbuffers *rb)
1039{
1040 struct stk_camera *dev = video_drvdata(filp);
1041
1042 if (dev == NULL)
1043 return -ENODEV;
1044 if (rb->memory != V4L2_MEMORY_MMAP)
1045 return -EINVAL;
1046 if (is_streaming(dev)
1047 || (dev->owner && dev->owner != filp))
1048 return -EBUSY;
1049 stk_free_buffers(dev);
1050 if (rb->count == 0) {
1051 stk_camera_write_reg(dev, 0x0, 0x49);
1052 unset_initialised(dev);
1053 dev->owner = NULL;
1054 return 0;
1055 }
1056 dev->owner = filp;
1057
1058
1059 if (rb->count < 3)
1060 rb->count = 3;
1061
1062 else if (rb->count > 5)
1063 rb->count = 5;
1064
1065 stk_allocate_buffers(dev, rb->count);
1066 rb->count = dev->n_sbufs;
1067 return 0;
1068}
1069
1070static int stk_vidioc_querybuf(struct file *filp,
1071 void *priv, struct v4l2_buffer *buf)
1072{
1073 struct stk_camera *dev = video_drvdata(filp);
1074 struct stk_sio_buffer *sbuf;
1075
1076 if (buf->index >= dev->n_sbufs)
1077 return -EINVAL;
1078 sbuf = dev->sio_bufs + buf->index;
1079 *buf = sbuf->v4lbuf;
1080 return 0;
1081}
1082
1083static int stk_vidioc_qbuf(struct file *filp,
1084 void *priv, struct v4l2_buffer *buf)
1085{
1086 struct stk_camera *dev = video_drvdata(filp);
1087 struct stk_sio_buffer *sbuf;
1088 unsigned long flags;
1089
1090 if (buf->memory != V4L2_MEMORY_MMAP)
1091 return -EINVAL;
1092
1093 if (buf->index >= dev->n_sbufs)
1094 return -EINVAL;
1095 sbuf = dev->sio_bufs + buf->index;
1096 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1097 return 0;
1098 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1099 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1100 spin_lock_irqsave(&dev->spinlock, flags);
1101 list_add_tail(&sbuf->list, &dev->sio_avail);
1102 *buf = sbuf->v4lbuf;
1103 spin_unlock_irqrestore(&dev->spinlock, flags);
1104 return 0;
1105}
1106
1107static int stk_vidioc_dqbuf(struct file *filp,
1108 void *priv, struct v4l2_buffer *buf)
1109{
1110 struct stk_camera *dev = video_drvdata(filp);
1111 struct stk_sio_buffer *sbuf;
1112 unsigned long flags;
1113 int ret;
1114
1115 if (!is_streaming(dev))
1116 return -EINVAL;
1117
1118 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1119 return -EWOULDBLOCK;
1120 ret = wait_event_interruptible(dev->wait_frame,
1121 !list_empty(&dev->sio_full) || !is_present(dev));
1122 if (ret)
1123 return ret;
1124 if (!is_present(dev))
1125 return -EIO;
1126
1127 spin_lock_irqsave(&dev->spinlock, flags);
1128 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1129 list_del_init(&sbuf->list);
1130 spin_unlock_irqrestore(&dev->spinlock, flags);
1131 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1132 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1133 sbuf->v4lbuf.sequence = ++dev->sequence;
1134 sbuf->v4lbuf.timestamp = ns_to_timeval(ktime_get_ns());
1135
1136 *buf = sbuf->v4lbuf;
1137 return 0;
1138}
1139
1140static int stk_vidioc_streamon(struct file *filp,
1141 void *priv, enum v4l2_buf_type type)
1142{
1143 struct stk_camera *dev = video_drvdata(filp);
1144 if (is_streaming(dev))
1145 return 0;
1146 if (dev->sio_bufs == NULL)
1147 return -EINVAL;
1148 dev->sequence = 0;
1149 return stk_start_stream(dev);
1150}
1151
1152static int stk_vidioc_streamoff(struct file *filp,
1153 void *priv, enum v4l2_buf_type type)
1154{
1155 struct stk_camera *dev = video_drvdata(filp);
1156 unsigned long flags;
1157 int i;
1158 stk_stop_stream(dev);
1159 spin_lock_irqsave(&dev->spinlock, flags);
1160 INIT_LIST_HEAD(&dev->sio_avail);
1161 INIT_LIST_HEAD(&dev->sio_full);
1162 for (i = 0; i < dev->n_sbufs; i++) {
1163 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1164 dev->sio_bufs[i].v4lbuf.flags = 0;
1165 }
1166 spin_unlock_irqrestore(&dev->spinlock, flags);
1167 return 0;
1168}
1169
1170
1171static int stk_vidioc_g_parm(struct file *filp,
1172 void *priv, struct v4l2_streamparm *sp)
1173{
1174
1175 sp->parm.capture.timeperframe.numerator = 1;
1176 sp->parm.capture.timeperframe.denominator = 30;
1177 sp->parm.capture.readbuffers = 2;
1178 return 0;
1179}
1180
1181static int stk_vidioc_enum_framesizes(struct file *filp,
1182 void *priv, struct v4l2_frmsizeenum *frms)
1183{
1184 if (frms->index >= ARRAY_SIZE(stk_sizes))
1185 return -EINVAL;
1186 switch (frms->pixel_format) {
1187 case V4L2_PIX_FMT_RGB565:
1188 case V4L2_PIX_FMT_RGB565X:
1189 case V4L2_PIX_FMT_UYVY:
1190 case V4L2_PIX_FMT_YUYV:
1191 case V4L2_PIX_FMT_SBGGR8:
1192 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1193 frms->discrete.width = stk_sizes[frms->index].w;
1194 frms->discrete.height = stk_sizes[frms->index].h;
1195 return 0;
1196 default: return -EINVAL;
1197 }
1198}
1199
1200static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1201 .s_ctrl = stk_s_ctrl,
1202};
1203
1204static const struct v4l2_file_operations v4l_stk_fops = {
1205 .owner = THIS_MODULE,
1206 .open = v4l_stk_open,
1207 .release = v4l_stk_release,
1208 .read = v4l_stk_read,
1209 .poll = v4l_stk_poll,
1210 .mmap = v4l_stk_mmap,
1211 .unlocked_ioctl = video_ioctl2,
1212};
1213
1214static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1215 .vidioc_querycap = stk_vidioc_querycap,
1216 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1217 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1218 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1219 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1220 .vidioc_enum_input = stk_vidioc_enum_input,
1221 .vidioc_s_input = stk_vidioc_s_input,
1222 .vidioc_g_input = stk_vidioc_g_input,
1223 .vidioc_reqbufs = stk_vidioc_reqbufs,
1224 .vidioc_querybuf = stk_vidioc_querybuf,
1225 .vidioc_qbuf = stk_vidioc_qbuf,
1226 .vidioc_dqbuf = stk_vidioc_dqbuf,
1227 .vidioc_streamon = stk_vidioc_streamon,
1228 .vidioc_streamoff = stk_vidioc_streamoff,
1229 .vidioc_g_parm = stk_vidioc_g_parm,
1230 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1231 .vidioc_log_status = v4l2_ctrl_log_status,
1232 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1233 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1234};
1235
1236static void stk_v4l_dev_release(struct video_device *vd)
1237{
1238 struct stk_camera *dev = vdev_to_camera(vd);
1239
1240 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1241 pr_err("We are leaking memory\n");
1242 usb_put_intf(dev->interface);
1243}
1244
1245static const struct video_device stk_v4l_data = {
1246 .name = "stkwebcam",
1247 .fops = &v4l_stk_fops,
1248 .ioctl_ops = &v4l_stk_ioctl_ops,
1249 .release = stk_v4l_dev_release,
1250};
1251
1252
1253static int stk_register_video_device(struct stk_camera *dev)
1254{
1255 int err;
1256
1257 dev->vdev = stk_v4l_data;
1258 dev->vdev.lock = &dev->lock;
1259 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1260 dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1261 V4L2_CAP_STREAMING;
1262 video_set_drvdata(&dev->vdev, dev);
1263 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1264 if (err)
1265 pr_err("v4l registration failed\n");
1266 else
1267 pr_info("Syntek USB2.0 Camera is now controlling device %s\n",
1268 video_device_node_name(&dev->vdev));
1269 return err;
1270}
1271
1272
1273
1274
1275static int stk_camera_probe(struct usb_interface *interface,
1276 const struct usb_device_id *id)
1277{
1278 struct v4l2_ctrl_handler *hdl;
1279 int err = 0;
1280 int i;
1281
1282 struct stk_camera *dev = NULL;
1283 struct usb_device *udev = interface_to_usbdev(interface);
1284 struct usb_host_interface *iface_desc;
1285 struct usb_endpoint_descriptor *endpoint;
1286
1287 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1288 if (dev == NULL) {
1289 pr_err("Out of memory !\n");
1290 return -ENOMEM;
1291 }
1292 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1293 if (err < 0) {
1294 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1295 kfree(dev);
1296 return err;
1297 }
1298 hdl = &dev->hdl;
1299 v4l2_ctrl_handler_init(hdl, 3);
1300 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1301 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1302 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1303 V4L2_CID_HFLIP, 0, 1, 1, 1);
1304 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1305 V4L2_CID_VFLIP, 0, 1, 1, 1);
1306 if (hdl->error) {
1307 err = hdl->error;
1308 dev_err(&udev->dev, "couldn't register control\n");
1309 goto error;
1310 }
1311 dev->v4l2_dev.ctrl_handler = hdl;
1312
1313 spin_lock_init(&dev->spinlock);
1314 mutex_init(&dev->lock);
1315 init_waitqueue_head(&dev->wait_frame);
1316 dev->first_init = 1;
1317
1318 dev->udev = udev;
1319 dev->interface = interface;
1320 usb_get_intf(interface);
1321
1322 if (hflip != -1)
1323 dev->vsettings.hflip = hflip;
1324 else if (dmi_check_system(stk_upside_down_dmi_table))
1325 dev->vsettings.hflip = 1;
1326 else
1327 dev->vsettings.hflip = 0;
1328 if (vflip != -1)
1329 dev->vsettings.vflip = vflip;
1330 else if (dmi_check_system(stk_upside_down_dmi_table))
1331 dev->vsettings.vflip = 1;
1332 else
1333 dev->vsettings.vflip = 0;
1334 dev->n_sbufs = 0;
1335 set_present(dev);
1336
1337
1338
1339
1340 iface_desc = interface->cur_altsetting;
1341
1342 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1343 endpoint = &iface_desc->endpoint[i].desc;
1344
1345 if (!dev->isoc_ep
1346 && usb_endpoint_is_isoc_in(endpoint)) {
1347
1348 dev->isoc_ep = usb_endpoint_num(endpoint);
1349 break;
1350 }
1351 }
1352 if (!dev->isoc_ep) {
1353 pr_err("Could not find isoc-in endpoint\n");
1354 err = -ENODEV;
1355 goto error;
1356 }
1357 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1358 dev->vsettings.mode = MODE_VGA;
1359 dev->frame_size = 640 * 480 * 2;
1360
1361 INIT_LIST_HEAD(&dev->sio_avail);
1362 INIT_LIST_HEAD(&dev->sio_full);
1363
1364 usb_set_intfdata(interface, dev);
1365
1366 err = stk_register_video_device(dev);
1367 if (err)
1368 goto error;
1369
1370 return 0;
1371
1372error:
1373 v4l2_ctrl_handler_free(hdl);
1374 v4l2_device_unregister(&dev->v4l2_dev);
1375 kfree(dev);
1376 return err;
1377}
1378
1379static void stk_camera_disconnect(struct usb_interface *interface)
1380{
1381 struct stk_camera *dev = usb_get_intfdata(interface);
1382
1383 usb_set_intfdata(interface, NULL);
1384 unset_present(dev);
1385
1386 wake_up_interruptible(&dev->wait_frame);
1387
1388 pr_info("Syntek USB2.0 Camera release resources device %s\n",
1389 video_device_node_name(&dev->vdev));
1390
1391 video_unregister_device(&dev->vdev);
1392 v4l2_ctrl_handler_free(&dev->hdl);
1393 v4l2_device_unregister(&dev->v4l2_dev);
1394 kfree(dev);
1395}
1396
1397#ifdef CONFIG_PM
1398static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1399{
1400 struct stk_camera *dev = usb_get_intfdata(intf);
1401 if (is_streaming(dev)) {
1402 stk_stop_stream(dev);
1403
1404 set_streaming(dev);
1405 }
1406 return 0;
1407}
1408
1409static int stk_camera_resume(struct usb_interface *intf)
1410{
1411 struct stk_camera *dev = usb_get_intfdata(intf);
1412 if (!is_initialised(dev))
1413 return 0;
1414 unset_initialised(dev);
1415 stk_initialise(dev);
1416 stk_camera_write_reg(dev, 0x0, 0x49);
1417 stk_setup_format(dev);
1418 if (is_streaming(dev))
1419 stk_start_stream(dev);
1420 return 0;
1421}
1422#endif
1423
1424static struct usb_driver stk_camera_driver = {
1425 .name = "stkwebcam",
1426 .probe = stk_camera_probe,
1427 .disconnect = stk_camera_disconnect,
1428 .id_table = stkwebcam_table,
1429#ifdef CONFIG_PM
1430 .suspend = stk_camera_suspend,
1431 .resume = stk_camera_resume,
1432#endif
1433};
1434
1435module_usb_driver(stk_camera_driver);
1436
