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[mirror_ubuntu-jammy-kernel.git] / drivers / media / video / stk-webcam.c
1 /*
2 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
3 *
4 * Copyright (C) 2006 Nicolas VIVIEN
5 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
6 *
7 * Some parts are inspired from cafe_ccic.c
8 * Copyright 2006-2007 Jonathan Corbet
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
30
31 #include <linux/usb.h>
32 #include <linux/mm.h>
33 #include <linux/vmalloc.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-ioctl.h>
37
38 #include "stk-webcam.h"
39
40
41 static int hflip = 1;
42 module_param(hflip, bool, 0444);
43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
44
45 static int vflip = 1;
46 module_param(vflip, bool, 0444);
47 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
48
49 static int debug;
50 module_param(debug, int, 0444);
51 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
52
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
55 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
56
57
58
59 /* Some cameras have audio interfaces, we aren't interested in those */
60 static struct usb_device_id stkwebcam_table[] = {
61 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
62 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
63 { }
64 };
65 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
66
67 /*
68 * Basic stuff
69 */
70 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
71 {
72 struct usb_device *udev = dev->udev;
73 int ret;
74
75 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
76 0x01,
77 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
78 value,
79 index,
80 NULL,
81 0,
82 500);
83 if (ret < 0)
84 return ret;
85 else
86 return 0;
87 }
88
89 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
90 {
91 struct usb_device *udev = dev->udev;
92 int ret;
93
94 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
95 0x00,
96 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97 0x00,
98 index,
99 (u8 *) value,
100 sizeof(u8),
101 500);
102 if (ret < 0)
103 return ret;
104 else
105 return 0;
106 }
107
108 static int stk_start_stream(struct stk_camera *dev)
109 {
110 int value;
111 int i, ret;
112 int value_116, value_117;
113
114 if (!is_present(dev))
115 return -ENODEV;
116 if (!is_memallocd(dev) || !is_initialised(dev)) {
117 STK_ERROR("FIXME: Buffers are not allocated\n");
118 return -EFAULT;
119 }
120 ret = usb_set_interface(dev->udev, 0, 5);
121
122 if (ret < 0)
123 STK_ERROR("usb_set_interface failed !\n");
124 if (stk_sensor_wakeup(dev))
125 STK_ERROR("error awaking the sensor\n");
126
127 stk_camera_read_reg(dev, 0x0116, &value_116);
128 stk_camera_read_reg(dev, 0x0117, &value_117);
129
130 stk_camera_write_reg(dev, 0x0116, 0x0000);
131 stk_camera_write_reg(dev, 0x0117, 0x0000);
132
133 stk_camera_read_reg(dev, 0x0100, &value);
134 stk_camera_write_reg(dev, 0x0100, value | 0x80);
135
136 stk_camera_write_reg(dev, 0x0116, value_116);
137 stk_camera_write_reg(dev, 0x0117, value_117);
138 for (i = 0; i < MAX_ISO_BUFS; i++) {
139 if (dev->isobufs[i].urb) {
140 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
141 atomic_inc(&dev->urbs_used);
142 if (ret)
143 return ret;
144 }
145 }
146 set_streaming(dev);
147 return 0;
148 }
149
150 static int stk_stop_stream(struct stk_camera *dev)
151 {
152 int value;
153 int i;
154 if (is_present(dev)) {
155 stk_camera_read_reg(dev, 0x0100, &value);
156 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
157 if (dev->isobufs != NULL) {
158 for (i = 0; i < MAX_ISO_BUFS; i++) {
159 if (dev->isobufs[i].urb)
160 usb_kill_urb(dev->isobufs[i].urb);
161 }
162 }
163 unset_streaming(dev);
164
165 if (usb_set_interface(dev->udev, 0, 0))
166 STK_ERROR("usb_set_interface failed !\n");
167 if (stk_sensor_sleep(dev))
168 STK_ERROR("error suspending the sensor\n");
169 }
170 return 0;
171 }
172
173 /*
174 * This seems to be the shortest init sequence we
175 * must do in order to find the sensor
176 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
177 * is also reset. Maybe powers down it?
178 * Rest of values don't make a difference
179 */
180
181 static struct regval stk1125_initvals[] = {
182 /*TODO: What means this sequence? */
183 {0x0000, 0x24},
184 {0x0100, 0x21},
185 {0x0002, 0x68},
186 {0x0003, 0x80},
187 {0x0005, 0x00},
188 {0x0007, 0x03},
189 {0x000d, 0x00},
190 {0x000f, 0x02},
191 {0x0300, 0x12},
192 {0x0350, 0x41},
193 {0x0351, 0x00},
194 {0x0352, 0x00},
195 {0x0353, 0x00},
196 {0x0018, 0x10},
197 {0x0019, 0x00},
198 {0x001b, 0x0e},
199 {0x001c, 0x46},
200 {0x0300, 0x80},
201 {0x001a, 0x04},
202 {0x0110, 0x00},
203 {0x0111, 0x00},
204 {0x0112, 0x00},
205 {0x0113, 0x00},
206
207 {0xffff, 0xff},
208 };
209
210
211 static int stk_initialise(struct stk_camera *dev)
212 {
213 struct regval *rv;
214 int ret;
215 if (!is_present(dev))
216 return -ENODEV;
217 if (is_initialised(dev))
218 return 0;
219 rv = stk1125_initvals;
220 while (rv->reg != 0xffff) {
221 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
222 if (ret)
223 return ret;
224 rv++;
225 }
226 if (stk_sensor_init(dev) == 0) {
227 set_initialised(dev);
228 return 0;
229 } else
230 return -1;
231 }
232
233 #ifdef CONFIG_VIDEO_V4L1_COMPAT
234
235 /* sysfs functions */
236 /*FIXME cleanup this */
237
238 static ssize_t show_brightness(struct device *class,
239 struct device_attribute *attr, char *buf)
240 {
241 struct video_device *vdev = to_video_device(class);
242 struct stk_camera *dev = vdev_to_camera(vdev);
243
244 return sprintf(buf, "%X\n", dev->vsettings.brightness);
245 }
246
247 static ssize_t store_brightness(struct device *class,
248 struct device_attribute *attr, const char *buf, size_t count)
249 {
250 char *endp;
251 unsigned long value;
252 int ret;
253
254 struct video_device *vdev = to_video_device(class);
255 struct stk_camera *dev = vdev_to_camera(vdev);
256
257 value = simple_strtoul(buf, &endp, 16);
258
259 dev->vsettings.brightness = (int) value;
260
261 ret = stk_sensor_set_brightness(dev, value >> 8);
262 if (ret)
263 return ret;
264 else
265 return count;
266 }
267
268 static ssize_t show_hflip(struct device *class,
269 struct device_attribute *attr, char *buf)
270 {
271 struct video_device *vdev = to_video_device(class);
272 struct stk_camera *dev = vdev_to_camera(vdev);
273
274 return sprintf(buf, "%d\n", dev->vsettings.hflip);
275 }
276
277 static ssize_t store_hflip(struct device *class,
278 struct device_attribute *attr, const char *buf, size_t count)
279 {
280 struct video_device *vdev = to_video_device(class);
281 struct stk_camera *dev = vdev_to_camera(vdev);
282
283 if (strncmp(buf, "1", 1) == 0)
284 dev->vsettings.hflip = 1;
285 else if (strncmp(buf, "0", 1) == 0)
286 dev->vsettings.hflip = 0;
287 else
288 return -EINVAL;
289
290 return strlen(buf);
291 }
292
293 static ssize_t show_vflip(struct device *class,
294 struct device_attribute *attr, char *buf)
295 {
296 struct video_device *vdev = to_video_device(class);
297 struct stk_camera *dev = vdev_to_camera(vdev);
298
299 return sprintf(buf, "%d\n", dev->vsettings.vflip);
300 }
301
302 static ssize_t store_vflip(struct device *class,
303 struct device_attribute *attr, const char *buf, size_t count)
304 {
305 struct video_device *vdev = to_video_device(class);
306 struct stk_camera *dev = vdev_to_camera(vdev);
307
308 if (strncmp(buf, "1", 1) == 0)
309 dev->vsettings.vflip = 1;
310 else if (strncmp(buf, "0", 1) == 0)
311 dev->vsettings.vflip = 0;
312 else
313 return -EINVAL;
314
315 return strlen(buf);
316 }
317
318 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
319 show_brightness, store_brightness);
320 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
321 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
322
323 static int stk_create_sysfs_files(struct video_device *vdev)
324 {
325 int ret;
326
327 ret = device_create_file(&vdev->dev, &dev_attr_brightness);
328 ret += device_create_file(&vdev->dev, &dev_attr_hflip);
329 ret += device_create_file(&vdev->dev, &dev_attr_vflip);
330 if (ret)
331 STK_WARNING("Could not create sysfs files\n");
332 return ret;
333 }
334
335 static void stk_remove_sysfs_files(struct video_device *vdev)
336 {
337 device_remove_file(&vdev->dev, &dev_attr_brightness);
338 device_remove_file(&vdev->dev, &dev_attr_hflip);
339 device_remove_file(&vdev->dev, &dev_attr_vflip);
340 }
341
342 #else
343 #define stk_create_sysfs_files(a)
344 #define stk_remove_sysfs_files(a)
345 #endif
346
347 /* *********************************************** */
348 /*
349 * This function is called as an URB transfert is complete (Isochronous pipe).
350 * So, the traitement is done in interrupt time, so it has be fast, not crash,
351 * and not stall. Neat.
352 */
353 static void stk_isoc_handler(struct urb *urb)
354 {
355 int i;
356 int ret;
357 int framelen;
358 unsigned long flags;
359
360 unsigned char *fill = NULL;
361 unsigned char *iso_buf = NULL;
362
363 struct stk_camera *dev;
364 struct stk_sio_buffer *fb;
365
366 dev = (struct stk_camera *) urb->context;
367
368 if (dev == NULL) {
369 STK_ERROR("isoc_handler called with NULL device !\n");
370 return;
371 }
372
373 if (urb->status == -ENOENT || urb->status == -ECONNRESET
374 || urb->status == -ESHUTDOWN) {
375 atomic_dec(&dev->urbs_used);
376 return;
377 }
378
379 spin_lock_irqsave(&dev->spinlock, flags);
380
381 if (urb->status != -EINPROGRESS && urb->status != 0) {
382 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
383 goto resubmit;
384 }
385
386 if (list_empty(&dev->sio_avail)) {
387 /*FIXME Stop streaming after a while */
388 (void) (printk_ratelimit() &&
389 STK_ERROR("isoc_handler without available buffer!\n"));
390 goto resubmit;
391 }
392 fb = list_first_entry(&dev->sio_avail,
393 struct stk_sio_buffer, list);
394 fill = fb->buffer + fb->v4lbuf.bytesused;
395
396 for (i = 0; i < urb->number_of_packets; i++) {
397 if (urb->iso_frame_desc[i].status != 0) {
398 if (urb->iso_frame_desc[i].status != -EXDEV)
399 STK_ERROR("Frame %d has error %d\n", i,
400 urb->iso_frame_desc[i].status);
401 continue;
402 }
403 framelen = urb->iso_frame_desc[i].actual_length;
404 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
405
406 if (framelen <= 4)
407 continue; /* no data */
408
409 /*
410 * we found something informational from there
411 * the isoc frames have to type of headers
412 * type1: 00 xx 00 00 or 20 xx 00 00
413 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
414 * xx is a sequencer which has never been seen over 0x3f
415 * imho data written down looks like bayer, i see similarities
416 * after every 640 bytes
417 */
418 if (*iso_buf & 0x80) {
419 framelen -= 8;
420 iso_buf += 8;
421 /* This marks a new frame */
422 if (fb->v4lbuf.bytesused != 0
423 && fb->v4lbuf.bytesused != dev->frame_size) {
424 (void) (printk_ratelimit() &&
425 STK_ERROR("frame %d, "
426 "bytesused=%d, skipping\n",
427 i, fb->v4lbuf.bytesused));
428 fb->v4lbuf.bytesused = 0;
429 fill = fb->buffer;
430 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
431 if (list_is_singular(&dev->sio_avail)) {
432 /* Always reuse the last buffer */
433 fb->v4lbuf.bytesused = 0;
434 fill = fb->buffer;
435 } else {
436 list_move_tail(dev->sio_avail.next,
437 &dev->sio_full);
438 wake_up(&dev->wait_frame);
439 fb = list_first_entry(&dev->sio_avail,
440 struct stk_sio_buffer, list);
441 fb->v4lbuf.bytesused = 0;
442 fill = fb->buffer;
443 }
444 }
445 } else {
446 framelen -= 4;
447 iso_buf += 4;
448 }
449
450 /* Our buffer is full !!! */
451 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
452 (void) (printk_ratelimit() &&
453 STK_ERROR("Frame buffer overflow, lost sync\n"));
454 /*FIXME Do something here? */
455 continue;
456 }
457 spin_unlock_irqrestore(&dev->spinlock, flags);
458 memcpy(fill, iso_buf, framelen);
459 spin_lock_irqsave(&dev->spinlock, flags);
460 fill += framelen;
461
462 /* New size of our buffer */
463 fb->v4lbuf.bytesused += framelen;
464 }
465
466 resubmit:
467 spin_unlock_irqrestore(&dev->spinlock, flags);
468 urb->dev = dev->udev;
469 ret = usb_submit_urb(urb, GFP_ATOMIC);
470 if (ret != 0) {
471 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
472 ret);
473 }
474 }
475
476 /* -------------------------------------------- */
477
478 static int stk_prepare_iso(struct stk_camera *dev)
479 {
480 void *kbuf;
481 int i, j;
482 struct urb *urb;
483 struct usb_device *udev;
484
485 if (dev == NULL)
486 return -ENXIO;
487 udev = dev->udev;
488
489 if (dev->isobufs)
490 STK_ERROR("isobufs already allocated. Bad\n");
491 else
492 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
493 GFP_KERNEL);
494 if (dev->isobufs == NULL) {
495 STK_ERROR("Unable to allocate iso buffers\n");
496 return -ENOMEM;
497 }
498 for (i = 0; i < MAX_ISO_BUFS; i++) {
499 if (dev->isobufs[i].data == NULL) {
500 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
501 if (kbuf == NULL) {
502 STK_ERROR("Failed to allocate iso buffer %d\n",
503 i);
504 goto isobufs_out;
505 }
506 dev->isobufs[i].data = kbuf;
507 } else
508 STK_ERROR("isobuf data already allocated\n");
509 if (dev->isobufs[i].urb == NULL) {
510 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
511 if (urb == NULL) {
512 STK_ERROR("Failed to allocate URB %d\n", i);
513 goto isobufs_out;
514 }
515 dev->isobufs[i].urb = urb;
516 } else {
517 STK_ERROR("Killing URB\n");
518 usb_kill_urb(dev->isobufs[i].urb);
519 urb = dev->isobufs[i].urb;
520 }
521 urb->interval = 1;
522 urb->dev = udev;
523 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
524 urb->transfer_flags = URB_ISO_ASAP;
525 urb->transfer_buffer = dev->isobufs[i].data;
526 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
527 urb->complete = stk_isoc_handler;
528 urb->context = dev;
529 urb->start_frame = 0;
530 urb->number_of_packets = ISO_FRAMES_PER_DESC;
531
532 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
533 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
534 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
535 }
536 }
537 set_memallocd(dev);
538 return 0;
539
540 isobufs_out:
541 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
542 kfree(dev->isobufs[i].data);
543 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
544 usb_free_urb(dev->isobufs[i].urb);
545 kfree(dev->isobufs);
546 dev->isobufs = NULL;
547 return -ENOMEM;
548 }
549
550 static void stk_clean_iso(struct stk_camera *dev)
551 {
552 int i;
553
554 if (dev == NULL || dev->isobufs == NULL)
555 return;
556
557 for (i = 0; i < MAX_ISO_BUFS; i++) {
558 struct urb *urb;
559
560 urb = dev->isobufs[i].urb;
561 if (urb) {
562 if (atomic_read(&dev->urbs_used) && is_present(dev))
563 usb_kill_urb(urb);
564 usb_free_urb(urb);
565 }
566 kfree(dev->isobufs[i].data);
567 }
568 kfree(dev->isobufs);
569 dev->isobufs = NULL;
570 unset_memallocd(dev);
571 }
572
573 static int stk_setup_siobuf(struct stk_camera *dev, int index)
574 {
575 struct stk_sio_buffer *buf = dev->sio_bufs + index;
576 INIT_LIST_HEAD(&buf->list);
577 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
578 buf->buffer = vmalloc_user(buf->v4lbuf.length);
579 if (buf->buffer == NULL)
580 return -ENOMEM;
581 buf->mapcount = 0;
582 buf->dev = dev;
583 buf->v4lbuf.index = index;
584 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
585 buf->v4lbuf.field = V4L2_FIELD_NONE;
586 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
587 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
588 return 0;
589 }
590
591 static int stk_free_sio_buffers(struct stk_camera *dev)
592 {
593 int i;
594 int nbufs;
595 unsigned long flags;
596 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
597 return 0;
598 /*
599 * If any buffers are mapped, we cannot free them at all.
600 */
601 for (i = 0; i < dev->n_sbufs; i++) {
602 if (dev->sio_bufs[i].mapcount > 0)
603 return -EBUSY;
604 }
605 /*
606 * OK, let's do it.
607 */
608 spin_lock_irqsave(&dev->spinlock, flags);
609 INIT_LIST_HEAD(&dev->sio_avail);
610 INIT_LIST_HEAD(&dev->sio_full);
611 nbufs = dev->n_sbufs;
612 dev->n_sbufs = 0;
613 spin_unlock_irqrestore(&dev->spinlock, flags);
614 for (i = 0; i < nbufs; i++) {
615 if (dev->sio_bufs[i].buffer != NULL)
616 vfree(dev->sio_bufs[i].buffer);
617 }
618 kfree(dev->sio_bufs);
619 dev->sio_bufs = NULL;
620 return 0;
621 }
622
623 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
624 {
625 int i;
626 if (dev->sio_bufs != NULL)
627 STK_ERROR("sio_bufs already allocated\n");
628 else {
629 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
630 GFP_KERNEL);
631 if (dev->sio_bufs == NULL)
632 return -ENOMEM;
633 for (i = 0; i < n_sbufs; i++) {
634 if (stk_setup_siobuf(dev, i))
635 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
636 dev->n_sbufs = i+1;
637 }
638 }
639 return 0;
640 }
641
642 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
643 {
644 int err;
645 err = stk_prepare_iso(dev);
646 if (err) {
647 stk_clean_iso(dev);
648 return err;
649 }
650 err = stk_prepare_sio_buffers(dev, n_sbufs);
651 if (err) {
652 stk_free_sio_buffers(dev);
653 return err;
654 }
655 return 0;
656 }
657
658 static void stk_free_buffers(struct stk_camera *dev)
659 {
660 stk_clean_iso(dev);
661 stk_free_sio_buffers(dev);
662 }
663 /* -------------------------------------------- */
664
665 /* v4l file operations */
666
667 static int v4l_stk_open(struct file *fp)
668 {
669 struct stk_camera *dev;
670 struct video_device *vdev;
671
672 vdev = video_devdata(fp);
673 dev = vdev_to_camera(vdev);
674
675 lock_kernel();
676 if (dev == NULL || !is_present(dev)) {
677 unlock_kernel();
678 return -ENXIO;
679 }
680 fp->private_data = dev;
681 usb_autopm_get_interface(dev->interface);
682 unlock_kernel();
683
684 return 0;
685 }
686
687 static int v4l_stk_release(struct file *fp)
688 {
689 struct stk_camera *dev = fp->private_data;
690
691 if (dev->owner == fp) {
692 stk_stop_stream(dev);
693 stk_free_buffers(dev);
694 dev->owner = NULL;
695 }
696
697 if(is_present(dev))
698 usb_autopm_put_interface(dev->interface);
699
700 return 0;
701 }
702
703 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
704 size_t count, loff_t *f_pos)
705 {
706 int i;
707 int ret;
708 unsigned long flags;
709 struct stk_sio_buffer *sbuf;
710 struct stk_camera *dev = fp->private_data;
711
712 if (!is_present(dev))
713 return -EIO;
714 if (dev->owner && dev->owner != fp)
715 return -EBUSY;
716 dev->owner = fp;
717 if (!is_streaming(dev)) {
718 if (stk_initialise(dev)
719 || stk_allocate_buffers(dev, 3)
720 || stk_start_stream(dev))
721 return -ENOMEM;
722 spin_lock_irqsave(&dev->spinlock, flags);
723 for (i = 0; i < dev->n_sbufs; i++) {
724 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
725 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
726 }
727 spin_unlock_irqrestore(&dev->spinlock, flags);
728 }
729 if (*f_pos == 0) {
730 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
731 return -EWOULDBLOCK;
732 ret = wait_event_interruptible(dev->wait_frame,
733 !list_empty(&dev->sio_full) || !is_present(dev));
734 if (ret)
735 return ret;
736 if (!is_present(dev))
737 return -EIO;
738 }
739 if (count + *f_pos > dev->frame_size)
740 count = dev->frame_size - *f_pos;
741 spin_lock_irqsave(&dev->spinlock, flags);
742 if (list_empty(&dev->sio_full)) {
743 spin_unlock_irqrestore(&dev->spinlock, flags);
744 STK_ERROR("BUG: No siobufs ready\n");
745 return 0;
746 }
747 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
748 spin_unlock_irqrestore(&dev->spinlock, flags);
749
750 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
751 return -EFAULT;
752
753 *f_pos += count;
754
755 if (*f_pos >= dev->frame_size) {
756 *f_pos = 0;
757 spin_lock_irqsave(&dev->spinlock, flags);
758 list_move_tail(&sbuf->list, &dev->sio_avail);
759 spin_unlock_irqrestore(&dev->spinlock, flags);
760 }
761 return count;
762 }
763
764 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
765 {
766 struct stk_camera *dev = fp->private_data;
767
768 poll_wait(fp, &dev->wait_frame, wait);
769
770 if (!is_present(dev))
771 return POLLERR;
772
773 if (!list_empty(&dev->sio_full))
774 return (POLLIN | POLLRDNORM);
775
776 return 0;
777 }
778
779
780 static void stk_v4l_vm_open(struct vm_area_struct *vma)
781 {
782 struct stk_sio_buffer *sbuf = vma->vm_private_data;
783 sbuf->mapcount++;
784 }
785 static void stk_v4l_vm_close(struct vm_area_struct *vma)
786 {
787 struct stk_sio_buffer *sbuf = vma->vm_private_data;
788 sbuf->mapcount--;
789 if (sbuf->mapcount == 0)
790 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
791 }
792 static struct vm_operations_struct stk_v4l_vm_ops = {
793 .open = stk_v4l_vm_open,
794 .close = stk_v4l_vm_close
795 };
796
797 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
798 {
799 unsigned int i;
800 int ret;
801 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
802 struct stk_camera *dev = fp->private_data;
803 struct stk_sio_buffer *sbuf = NULL;
804
805 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
806 return -EINVAL;
807
808 for (i = 0; i < dev->n_sbufs; i++) {
809 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
810 sbuf = dev->sio_bufs + i;
811 break;
812 }
813 }
814 if (sbuf == NULL)
815 return -EINVAL;
816 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
817 if (ret)
818 return ret;
819 vma->vm_flags |= VM_DONTEXPAND;
820 vma->vm_private_data = sbuf;
821 vma->vm_ops = &stk_v4l_vm_ops;
822 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
823 stk_v4l_vm_open(vma);
824 return 0;
825 }
826
827 /* v4l ioctl handlers */
828
829 static int stk_vidioc_querycap(struct file *filp,
830 void *priv, struct v4l2_capability *cap)
831 {
832 strcpy(cap->driver, "stk");
833 strcpy(cap->card, "stk");
834 cap->version = DRIVER_VERSION_NUM;
835
836 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
837 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
838 return 0;
839 }
840
841 static int stk_vidioc_enum_input(struct file *filp,
842 void *priv, struct v4l2_input *input)
843 {
844 if (input->index != 0)
845 return -EINVAL;
846
847 strcpy(input->name, "Syntek USB Camera");
848 input->type = V4L2_INPUT_TYPE_CAMERA;
849 return 0;
850 }
851
852
853 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
854 {
855 *i = 0;
856 return 0;
857 }
858
859 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
860 {
861 if (i != 0)
862 return -EINVAL;
863 else
864 return 0;
865 }
866
867 /* from vivi.c */
868 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
869 {
870 return 0;
871 }
872
873 /* List of all V4Lv2 controls supported by the driver */
874 static struct v4l2_queryctrl stk_controls[] = {
875 {
876 .id = V4L2_CID_BRIGHTNESS,
877 .type = V4L2_CTRL_TYPE_INTEGER,
878 .name = "Brightness",
879 .minimum = 0,
880 .maximum = 0xffff,
881 .step = 0x0100,
882 .default_value = 0x6000,
883 },
884 /*TODO: get more controls to work */
885 };
886
887 static int stk_vidioc_queryctrl(struct file *filp,
888 void *priv, struct v4l2_queryctrl *c)
889 {
890 int i;
891 int nbr;
892 nbr = ARRAY_SIZE(stk_controls);
893
894 for (i = 0; i < nbr; i++) {
895 if (stk_controls[i].id == c->id) {
896 memcpy(c, &stk_controls[i],
897 sizeof(struct v4l2_queryctrl));
898 return 0;
899 }
900 }
901 return -EINVAL;
902 }
903
904 static int stk_vidioc_g_ctrl(struct file *filp,
905 void *priv, struct v4l2_control *c)
906 {
907 struct stk_camera *dev = priv;
908 switch (c->id) {
909 case V4L2_CID_BRIGHTNESS:
910 c->value = dev->vsettings.brightness;
911 break;
912 default:
913 return -EINVAL;
914 }
915 return 0;
916 }
917
918 static int stk_vidioc_s_ctrl(struct file *filp,
919 void *priv, struct v4l2_control *c)
920 {
921 struct stk_camera *dev = priv;
922 switch (c->id) {
923 case V4L2_CID_BRIGHTNESS:
924 dev->vsettings.brightness = c->value;
925 return stk_sensor_set_brightness(dev, c->value >> 8);
926 default:
927 return -EINVAL;
928 }
929 return 0;
930 }
931
932
933 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
934 void *priv, struct v4l2_fmtdesc *fmtd)
935 {
936 switch (fmtd->index) {
937 case 0:
938 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
939 strcpy(fmtd->description, "r5g6b5");
940 break;
941 case 1:
942 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
943 strcpy(fmtd->description, "r5g6b5BE");
944 break;
945 case 2:
946 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
947 strcpy(fmtd->description, "yuv4:2:2");
948 break;
949 case 3:
950 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
951 strcpy(fmtd->description, "Raw bayer");
952 break;
953 case 4:
954 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
955 strcpy(fmtd->description, "yuv4:2:2");
956 break;
957 default:
958 return -EINVAL;
959 }
960 return 0;
961 }
962
963 static struct stk_size {
964 unsigned w;
965 unsigned h;
966 enum stk_mode m;
967 } stk_sizes[] = {
968 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
969 { .w = 640, .h = 480, .m = MODE_VGA, },
970 { .w = 352, .h = 288, .m = MODE_CIF, },
971 { .w = 320, .h = 240, .m = MODE_QVGA, },
972 { .w = 176, .h = 144, .m = MODE_QCIF, },
973 };
974
975 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
976 void *priv, struct v4l2_format *f)
977 {
978 struct v4l2_pix_format *pix_format = &f->fmt.pix;
979 struct stk_camera *dev = priv;
980 int i;
981
982 for (i = 0; i < ARRAY_SIZE(stk_sizes)
983 && stk_sizes[i].m != dev->vsettings.mode;
984 i++);
985 if (i == ARRAY_SIZE(stk_sizes)) {
986 STK_ERROR("ERROR: mode invalid\n");
987 return -EINVAL;
988 }
989 pix_format->width = stk_sizes[i].w;
990 pix_format->height = stk_sizes[i].h;
991 pix_format->field = V4L2_FIELD_NONE;
992 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
993 pix_format->pixelformat = dev->vsettings.palette;
994 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
995 pix_format->bytesperline = pix_format->width;
996 else
997 pix_format->bytesperline = 2 * pix_format->width;
998 pix_format->sizeimage = pix_format->bytesperline
999 * pix_format->height;
1000 return 0;
1001 }
1002
1003 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1004 void *priv, struct v4l2_format *fmtd)
1005 {
1006 int i;
1007 switch (fmtd->fmt.pix.pixelformat) {
1008 case V4L2_PIX_FMT_RGB565:
1009 case V4L2_PIX_FMT_RGB565X:
1010 case V4L2_PIX_FMT_UYVY:
1011 case V4L2_PIX_FMT_YUYV:
1012 case V4L2_PIX_FMT_SBGGR8:
1013 break;
1014 default:
1015 return -EINVAL;
1016 }
1017 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1018 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1019 break;
1020 }
1021 if (i == ARRAY_SIZE(stk_sizes)
1022 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1023 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1024 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1025 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1026 fmtd->fmt.pix.priv = i - 1;
1027 } else {
1028 fmtd->fmt.pix.height = stk_sizes[i].h;
1029 fmtd->fmt.pix.width = stk_sizes[i].w;
1030 fmtd->fmt.pix.priv = i;
1031 }
1032
1033 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1034 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1035 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1036 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1037 else
1038 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1039 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1040 * fmtd->fmt.pix.height;
1041 return 0;
1042 }
1043
1044 static int stk_setup_format(struct stk_camera *dev)
1045 {
1046 int i = 0;
1047 int depth;
1048 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1049 depth = 1;
1050 else
1051 depth = 2;
1052 while (stk_sizes[i].m != dev->vsettings.mode
1053 && i < ARRAY_SIZE(stk_sizes))
1054 i++;
1055 if (i == ARRAY_SIZE(stk_sizes)) {
1056 STK_ERROR("Something is broken in %s\n", __func__);
1057 return -EFAULT;
1058 }
1059 /* This registers controls some timings, not sure of what. */
1060 stk_camera_write_reg(dev, 0x001b, 0x0e);
1061 if (dev->vsettings.mode == MODE_SXGA)
1062 stk_camera_write_reg(dev, 0x001c, 0x0e);
1063 else
1064 stk_camera_write_reg(dev, 0x001c, 0x46);
1065 /*
1066 * Registers 0x0115 0x0114 are the size of each line (bytes),
1067 * regs 0x0117 0x0116 are the heigth of the image.
1068 */
1069 stk_camera_write_reg(dev, 0x0115,
1070 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1071 stk_camera_write_reg(dev, 0x0114,
1072 (stk_sizes[i].w * depth) & 0xff);
1073 stk_camera_write_reg(dev, 0x0117,
1074 (stk_sizes[i].h >> 8) & 0xff);
1075 stk_camera_write_reg(dev, 0x0116,
1076 stk_sizes[i].h & 0xff);
1077 return stk_sensor_configure(dev);
1078 }
1079
1080 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1081 void *priv, struct v4l2_format *fmtd)
1082 {
1083 int ret;
1084 struct stk_camera *dev = priv;
1085
1086 if (dev == NULL)
1087 return -ENODEV;
1088 if (!is_present(dev))
1089 return -ENODEV;
1090 if (is_streaming(dev))
1091 return -EBUSY;
1092 if (dev->owner && dev->owner != filp)
1093 return -EBUSY;
1094 ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1095 if (ret)
1096 return ret;
1097 dev->owner = filp;
1098
1099 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1100 stk_free_buffers(dev);
1101 dev->frame_size = fmtd->fmt.pix.sizeimage;
1102 dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1103
1104 stk_initialise(dev);
1105 return stk_setup_format(dev);
1106 }
1107
1108 static int stk_vidioc_reqbufs(struct file *filp,
1109 void *priv, struct v4l2_requestbuffers *rb)
1110 {
1111 struct stk_camera *dev = priv;
1112
1113 if (dev == NULL)
1114 return -ENODEV;
1115 if (rb->memory != V4L2_MEMORY_MMAP)
1116 return -EINVAL;
1117 if (is_streaming(dev)
1118 || (dev->owner && dev->owner != filp))
1119 return -EBUSY;
1120 dev->owner = filp;
1121
1122 /*FIXME If they ask for zero, we must stop streaming and free */
1123 if (rb->count < 3)
1124 rb->count = 3;
1125 /* Arbitrary limit */
1126 else if (rb->count > 5)
1127 rb->count = 5;
1128
1129 stk_allocate_buffers(dev, rb->count);
1130 rb->count = dev->n_sbufs;
1131 return 0;
1132 }
1133
1134 static int stk_vidioc_querybuf(struct file *filp,
1135 void *priv, struct v4l2_buffer *buf)
1136 {
1137 struct stk_camera *dev = priv;
1138 struct stk_sio_buffer *sbuf;
1139
1140 if (buf->index >= dev->n_sbufs)
1141 return -EINVAL;
1142 sbuf = dev->sio_bufs + buf->index;
1143 *buf = sbuf->v4lbuf;
1144 return 0;
1145 }
1146
1147 static int stk_vidioc_qbuf(struct file *filp,
1148 void *priv, struct v4l2_buffer *buf)
1149 {
1150 struct stk_camera *dev = priv;
1151 struct stk_sio_buffer *sbuf;
1152 unsigned long flags;
1153
1154 if (buf->memory != V4L2_MEMORY_MMAP)
1155 return -EINVAL;
1156
1157 if (buf->index >= dev->n_sbufs)
1158 return -EINVAL;
1159 sbuf = dev->sio_bufs + buf->index;
1160 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1161 return 0;
1162 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1163 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1164 spin_lock_irqsave(&dev->spinlock, flags);
1165 list_add_tail(&sbuf->list, &dev->sio_avail);
1166 *buf = sbuf->v4lbuf;
1167 spin_unlock_irqrestore(&dev->spinlock, flags);
1168 return 0;
1169 }
1170
1171 static int stk_vidioc_dqbuf(struct file *filp,
1172 void *priv, struct v4l2_buffer *buf)
1173 {
1174 struct stk_camera *dev = priv;
1175 struct stk_sio_buffer *sbuf;
1176 unsigned long flags;
1177 int ret;
1178
1179 if (!is_streaming(dev))
1180 return -EINVAL;
1181
1182 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1183 return -EWOULDBLOCK;
1184 ret = wait_event_interruptible(dev->wait_frame,
1185 !list_empty(&dev->sio_full) || !is_present(dev));
1186 if (ret)
1187 return ret;
1188 if (!is_present(dev))
1189 return -EIO;
1190
1191 spin_lock_irqsave(&dev->spinlock, flags);
1192 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1193 list_del_init(&sbuf->list);
1194 spin_unlock_irqrestore(&dev->spinlock, flags);
1195 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1196 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1197 sbuf->v4lbuf.sequence = ++dev->sequence;
1198 do_gettimeofday(&sbuf->v4lbuf.timestamp);
1199
1200 *buf = sbuf->v4lbuf;
1201 return 0;
1202 }
1203
1204 static int stk_vidioc_streamon(struct file *filp,
1205 void *priv, enum v4l2_buf_type type)
1206 {
1207 struct stk_camera *dev = priv;
1208 if (is_streaming(dev))
1209 return 0;
1210 if (dev->sio_bufs == NULL)
1211 return -EINVAL;
1212 dev->sequence = 0;
1213 return stk_start_stream(dev);
1214 }
1215
1216 static int stk_vidioc_streamoff(struct file *filp,
1217 void *priv, enum v4l2_buf_type type)
1218 {
1219 struct stk_camera *dev = priv;
1220 unsigned long flags;
1221 int i;
1222 stk_stop_stream(dev);
1223 spin_lock_irqsave(&dev->spinlock, flags);
1224 INIT_LIST_HEAD(&dev->sio_avail);
1225 INIT_LIST_HEAD(&dev->sio_full);
1226 for (i = 0; i < dev->n_sbufs; i++) {
1227 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1228 dev->sio_bufs[i].v4lbuf.flags = 0;
1229 }
1230 spin_unlock_irqrestore(&dev->spinlock, flags);
1231 return 0;
1232 }
1233
1234
1235 static int stk_vidioc_g_parm(struct file *filp,
1236 void *priv, struct v4l2_streamparm *sp)
1237 {
1238 /*FIXME This is not correct */
1239 sp->parm.capture.timeperframe.numerator = 1;
1240 sp->parm.capture.timeperframe.denominator = 30;
1241 sp->parm.capture.readbuffers = 2;
1242 return 0;
1243 }
1244
1245 static int stk_vidioc_enum_framesizes(struct file *filp,
1246 void *priv, struct v4l2_frmsizeenum *frms)
1247 {
1248 if (frms->index >= ARRAY_SIZE(stk_sizes))
1249 return -EINVAL;
1250 switch (frms->pixel_format) {
1251 case V4L2_PIX_FMT_RGB565:
1252 case V4L2_PIX_FMT_RGB565X:
1253 case V4L2_PIX_FMT_UYVY:
1254 case V4L2_PIX_FMT_YUYV:
1255 case V4L2_PIX_FMT_SBGGR8:
1256 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1257 frms->discrete.width = stk_sizes[frms->index].w;
1258 frms->discrete.height = stk_sizes[frms->index].h;
1259 return 0;
1260 default: return -EINVAL;
1261 }
1262 }
1263
1264 static struct v4l2_file_operations v4l_stk_fops = {
1265 .owner = THIS_MODULE,
1266 .open = v4l_stk_open,
1267 .release = v4l_stk_release,
1268 .read = v4l_stk_read,
1269 .poll = v4l_stk_poll,
1270 .mmap = v4l_stk_mmap,
1271 .ioctl = video_ioctl2,
1272 };
1273
1274 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1275 .vidioc_querycap = stk_vidioc_querycap,
1276 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1277 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1278 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1279 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1280 .vidioc_enum_input = stk_vidioc_enum_input,
1281 .vidioc_s_input = stk_vidioc_s_input,
1282 .vidioc_g_input = stk_vidioc_g_input,
1283 .vidioc_s_std = stk_vidioc_s_std,
1284 .vidioc_reqbufs = stk_vidioc_reqbufs,
1285 .vidioc_querybuf = stk_vidioc_querybuf,
1286 .vidioc_qbuf = stk_vidioc_qbuf,
1287 .vidioc_dqbuf = stk_vidioc_dqbuf,
1288 .vidioc_streamon = stk_vidioc_streamon,
1289 .vidioc_streamoff = stk_vidioc_streamoff,
1290 .vidioc_queryctrl = stk_vidioc_queryctrl,
1291 .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1292 .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1293 .vidioc_g_parm = stk_vidioc_g_parm,
1294 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1295 };
1296
1297 static void stk_v4l_dev_release(struct video_device *vd)
1298 {
1299 struct stk_camera *dev = vdev_to_camera(vd);
1300
1301 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1302 STK_ERROR("We are leaking memory\n");
1303 usb_put_intf(dev->interface);
1304 kfree(dev);
1305 }
1306
1307 static struct video_device stk_v4l_data = {
1308 .name = "stkwebcam",
1309 .minor = -1,
1310 .tvnorms = V4L2_STD_UNKNOWN,
1311 .current_norm = V4L2_STD_UNKNOWN,
1312 .fops = &v4l_stk_fops,
1313 .ioctl_ops = &v4l_stk_ioctl_ops,
1314 .release = stk_v4l_dev_release,
1315 };
1316
1317
1318 static int stk_register_video_device(struct stk_camera *dev)
1319 {
1320 int err;
1321
1322 dev->vdev = stk_v4l_data;
1323 dev->vdev.debug = debug;
1324 dev->vdev.parent = &dev->interface->dev;
1325 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1326 if (err)
1327 STK_ERROR("v4l registration failed\n");
1328 else
1329 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1330 " /dev/video%d\n", dev->vdev.num);
1331 return err;
1332 }
1333
1334
1335 /* USB Stuff */
1336
1337 static int stk_camera_probe(struct usb_interface *interface,
1338 const struct usb_device_id *id)
1339 {
1340 int i;
1341 int err = 0;
1342
1343 struct stk_camera *dev = NULL;
1344 struct usb_device *udev = interface_to_usbdev(interface);
1345 struct usb_host_interface *iface_desc;
1346 struct usb_endpoint_descriptor *endpoint;
1347
1348 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1349 if (dev == NULL) {
1350 STK_ERROR("Out of memory !\n");
1351 return -ENOMEM;
1352 }
1353
1354 spin_lock_init(&dev->spinlock);
1355 init_waitqueue_head(&dev->wait_frame);
1356
1357 dev->udev = udev;
1358 dev->interface = interface;
1359 usb_get_intf(interface);
1360
1361 dev->vsettings.vflip = vflip;
1362 dev->vsettings.hflip = hflip;
1363 dev->n_sbufs = 0;
1364 set_present(dev);
1365
1366 /* Set up the endpoint information
1367 * use only the first isoc-in endpoint
1368 * for the current alternate setting */
1369 iface_desc = interface->cur_altsetting;
1370
1371 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1372 endpoint = &iface_desc->endpoint[i].desc;
1373
1374 if (!dev->isoc_ep
1375 && usb_endpoint_is_isoc_in(endpoint)) {
1376 /* we found an isoc in endpoint */
1377 dev->isoc_ep = usb_endpoint_num(endpoint);
1378 break;
1379 }
1380 }
1381 if (!dev->isoc_ep) {
1382 STK_ERROR("Could not find isoc-in endpoint");
1383 err = -ENODEV;
1384 goto error;
1385 }
1386 dev->vsettings.brightness = 0x7fff;
1387 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1388 dev->vsettings.mode = MODE_VGA;
1389 dev->frame_size = 640 * 480 * 2;
1390
1391 INIT_LIST_HEAD(&dev->sio_avail);
1392 INIT_LIST_HEAD(&dev->sio_full);
1393
1394 usb_set_intfdata(interface, dev);
1395
1396 err = stk_register_video_device(dev);
1397 if (err) {
1398 goto error;
1399 }
1400
1401 stk_create_sysfs_files(&dev->vdev);
1402 usb_autopm_enable(dev->interface);
1403
1404 return 0;
1405
1406 error:
1407 kfree(dev);
1408 return err;
1409 }
1410
1411 static void stk_camera_disconnect(struct usb_interface *interface)
1412 {
1413 struct stk_camera *dev = usb_get_intfdata(interface);
1414
1415 usb_set_intfdata(interface, NULL);
1416 unset_present(dev);
1417
1418 wake_up_interruptible(&dev->wait_frame);
1419 stk_remove_sysfs_files(&dev->vdev);
1420
1421 STK_INFO("Syntek USB2.0 Camera release resources "
1422 "video device /dev/video%d\n", dev->vdev.num);
1423
1424 video_unregister_device(&dev->vdev);
1425 }
1426
1427 #ifdef CONFIG_PM
1428 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1429 {
1430 struct stk_camera *dev = usb_get_intfdata(intf);
1431 if (is_streaming(dev)) {
1432 stk_stop_stream(dev);
1433 /* yes, this is ugly */
1434 set_streaming(dev);
1435 }
1436 return 0;
1437 }
1438
1439 static int stk_camera_resume(struct usb_interface *intf)
1440 {
1441 struct stk_camera *dev = usb_get_intfdata(intf);
1442 if (!is_initialised(dev))
1443 return 0;
1444 unset_initialised(dev);
1445 stk_initialise(dev);
1446 stk_setup_format(dev);
1447 if (is_streaming(dev))
1448 stk_start_stream(dev);
1449 return 0;
1450 }
1451 #endif
1452
1453 static struct usb_driver stk_camera_driver = {
1454 .name = "stkwebcam",
1455 .probe = stk_camera_probe,
1456 .disconnect = stk_camera_disconnect,
1457 .id_table = stkwebcam_table,
1458 #ifdef CONFIG_PM
1459 .suspend = stk_camera_suspend,
1460 .resume = stk_camera_resume,
1461 #endif
1462 };
1463
1464
1465 static int __init stk_camera_init(void)
1466 {
1467 int result;
1468
1469 result = usb_register(&stk_camera_driver);
1470 if (result)
1471 STK_ERROR("usb_register failed ! Error number %d\n", result);
1472
1473
1474 return result;
1475 }
1476
1477 static void __exit stk_camera_exit(void)
1478 {
1479 usb_deregister(&stk_camera_driver);
1480 }
1481
1482 module_init(stk_camera_init);
1483 module_exit(stk_camera_exit);
1484
1485
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