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IB: Fix information leak in marshalling code
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / stk-webcam.c
blobf07a0f6b71c455a253845df29705ed96c3b32083
1 /*
2 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
3 *
4 * Copyright (C) 2006 Nicolas VIVIEN
5 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
6 *
7 * Some parts are inspired from cafe_ccic.c
8 * Copyright 2006-2007 Jonathan Corbet
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/smp_lock.h>
31
32 #include <linux/usb.h>
33 #include <linux/mm.h>
34 #include <linux/vmalloc.h>
35 #include <linux/videodev2.h>
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-ioctl.h>
38
39 #include "stk-webcam.h"
40
41
42 static int hflip = 1;
43 module_param(hflip, bool, 0444);
44 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
45
46 static int vflip = 1;
47 module_param(vflip, bool, 0444);
48 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
49
50 static int debug;
51 module_param(debug, int, 0444);
52 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
53
54 MODULE_LICENSE("GPL");
55 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
56 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
57
58
59
60 /* Some cameras have audio interfaces, we aren't interested in those */
61 static struct usb_device_id stkwebcam_table[] = {
62 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
63 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
64 { }
65 };
66 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
67
68 /*
69 * Basic stuff
70 */
71 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
72 {
73 struct usb_device *udev = dev->udev;
74 int ret;
75
76 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
77 0x01,
78 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
79 value,
80 index,
81 NULL,
82 0,
83 500);
84 if (ret < 0)
85 return ret;
86 else
87 return 0;
88 }
89
90 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
91 {
92 struct usb_device *udev = dev->udev;
93 int ret;
94
95 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
96 0x00,
97 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
98 0x00,
99 index,
100 (u8 *) value,
101 sizeof(u8),
102 500);
103 if (ret < 0)
104 return ret;
105 else
106 return 0;
107 }
108
109 static int stk_start_stream(struct stk_camera *dev)
110 {
111 int value;
112 int i, ret;
113 int value_116, value_117;
114
115 if (!is_present(dev))
116 return -ENODEV;
117 if (!is_memallocd(dev) || !is_initialised(dev)) {
118 STK_ERROR("FIXME: Buffers are not allocated\n");
119 return -EFAULT;
120 }
121 ret = usb_set_interface(dev->udev, 0, 5);
122
123 if (ret < 0)
124 STK_ERROR("usb_set_interface failed !\n");
125 if (stk_sensor_wakeup(dev))
126 STK_ERROR("error awaking the sensor\n");
127
128 stk_camera_read_reg(dev, 0x0116, &value_116);
129 stk_camera_read_reg(dev, 0x0117, &value_117);
130
131 stk_camera_write_reg(dev, 0x0116, 0x0000);
132 stk_camera_write_reg(dev, 0x0117, 0x0000);
133
134 stk_camera_read_reg(dev, 0x0100, &value);
135 stk_camera_write_reg(dev, 0x0100, value | 0x80);
136
137 stk_camera_write_reg(dev, 0x0116, value_116);
138 stk_camera_write_reg(dev, 0x0117, value_117);
139 for (i = 0; i < MAX_ISO_BUFS; i++) {
140 if (dev->isobufs[i].urb) {
141 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
142 atomic_inc(&dev->urbs_used);
143 if (ret)
144 return ret;
145 }
146 }
147 set_streaming(dev);
148 return 0;
149 }
150
151 static int stk_stop_stream(struct stk_camera *dev)
152 {
153 int value;
154 int i;
155 if (is_present(dev)) {
156 stk_camera_read_reg(dev, 0x0100, &value);
157 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
158 if (dev->isobufs != NULL) {
159 for (i = 0; i < MAX_ISO_BUFS; i++) {
160 if (dev->isobufs[i].urb)
161 usb_kill_urb(dev->isobufs[i].urb);
162 }
163 }
164 unset_streaming(dev);
165
166 if (usb_set_interface(dev->udev, 0, 0))
167 STK_ERROR("usb_set_interface failed !\n");
168 if (stk_sensor_sleep(dev))
169 STK_ERROR("error suspending the sensor\n");
170 }
171 return 0;
172 }
173
174 /*
175 * This seems to be the shortest init sequence we
176 * must do in order to find the sensor
177 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
178 * is also reset. Maybe powers down it?
179 * Rest of values don't make a difference
180 */
181
182 static struct regval stk1125_initvals[] = {
183 /*TODO: What means this sequence? */
184 {0x0000, 0x24},
185 {0x0100, 0x21},
186 {0x0002, 0x68},
187 {0x0003, 0x80},
188 {0x0005, 0x00},
189 {0x0007, 0x03},
190 {0x000d, 0x00},
191 {0x000f, 0x02},
192 {0x0300, 0x12},
193 {0x0350, 0x41},
194 {0x0351, 0x00},
195 {0x0352, 0x00},
196 {0x0353, 0x00},
197 {0x0018, 0x10},
198 {0x0019, 0x00},
199 {0x001b, 0x0e},
200 {0x001c, 0x46},
201 {0x0300, 0x80},
202 {0x001a, 0x04},
203 {0x0110, 0x00},
204 {0x0111, 0x00},
205 {0x0112, 0x00},
206 {0x0113, 0x00},
207
208 {0xffff, 0xff},
209 };
210
211
212 static int stk_initialise(struct stk_camera *dev)
213 {
214 struct regval *rv;
215 int ret;
216 if (!is_present(dev))
217 return -ENODEV;
218 if (is_initialised(dev))
219 return 0;
220 rv = stk1125_initvals;
221 while (rv->reg != 0xffff) {
222 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
223 if (ret)
224 return ret;
225 rv++;
226 }
227 if (stk_sensor_init(dev) == 0) {
228 set_initialised(dev);
229 return 0;
230 } else
231 return -1;
232 }
233
234 #ifdef CONFIG_VIDEO_V4L1_COMPAT
235
236 /* sysfs functions */
237 /*FIXME cleanup this */
238
239 static ssize_t show_brightness(struct device *class,
240 struct device_attribute *attr, char *buf)
241 {
242 struct video_device *vdev = to_video_device(class);
243 struct stk_camera *dev = vdev_to_camera(vdev);
244
245 return sprintf(buf, "%X\n", dev->vsettings.brightness);
246 }
247
248 static ssize_t store_brightness(struct device *class,
249 struct device_attribute *attr, const char *buf, size_t count)
250 {
251 char *endp;
252 unsigned long value;
253 int ret;
254
255 struct video_device *vdev = to_video_device(class);
256 struct stk_camera *dev = vdev_to_camera(vdev);
257
258 value = simple_strtoul(buf, &endp, 16);
259
260 dev->vsettings.brightness = (int) value;
261
262 ret = stk_sensor_set_brightness(dev, value >> 8);
263 if (ret)
264 return ret;
265 else
266 return count;
267 }
268
269 static ssize_t show_hflip(struct device *class,
270 struct device_attribute *attr, char *buf)
271 {
272 struct video_device *vdev = to_video_device(class);
273 struct stk_camera *dev = vdev_to_camera(vdev);
274
275 return sprintf(buf, "%d\n", dev->vsettings.hflip);
276 }
277
278 static ssize_t store_hflip(struct device *class,
279 struct device_attribute *attr, const char *buf, size_t count)
280 {
281 struct video_device *vdev = to_video_device(class);
282 struct stk_camera *dev = vdev_to_camera(vdev);
283
284 if (strncmp(buf, "1", 1) == 0)
285 dev->vsettings.hflip = 1;
286 else if (strncmp(buf, "0", 1) == 0)
287 dev->vsettings.hflip = 0;
288 else
289 return -EINVAL;
290
291 return strlen(buf);
292 }
293
294 static ssize_t show_vflip(struct device *class,
295 struct device_attribute *attr, char *buf)
296 {
297 struct video_device *vdev = to_video_device(class);
298 struct stk_camera *dev = vdev_to_camera(vdev);
299
300 return sprintf(buf, "%d\n", dev->vsettings.vflip);
301 }
302
303 static ssize_t store_vflip(struct device *class,
304 struct device_attribute *attr, const char *buf, size_t count)
305 {
306 struct video_device *vdev = to_video_device(class);
307 struct stk_camera *dev = vdev_to_camera(vdev);
308
309 if (strncmp(buf, "1", 1) == 0)
310 dev->vsettings.vflip = 1;
311 else if (strncmp(buf, "0", 1) == 0)
312 dev->vsettings.vflip = 0;
313 else
314 return -EINVAL;
315
316 return strlen(buf);
317 }
318
319 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
320 show_brightness, store_brightness);
321 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
322 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
323
324 static int stk_create_sysfs_files(struct video_device *vdev)
325 {
326 int ret;
327
328 ret = device_create_file(&vdev->dev, &dev_attr_brightness);
329 ret += device_create_file(&vdev->dev, &dev_attr_hflip);
330 ret += device_create_file(&vdev->dev, &dev_attr_vflip);
331 if (ret)
332 STK_WARNING("Could not create sysfs files\n");
333 return ret;
334 }
335
336 static void stk_remove_sysfs_files(struct video_device *vdev)
337 {
338 device_remove_file(&vdev->dev, &dev_attr_brightness);
339 device_remove_file(&vdev->dev, &dev_attr_hflip);
340 device_remove_file(&vdev->dev, &dev_attr_vflip);
341 }
342
343 #else
344 #define stk_create_sysfs_files(a)
345 #define stk_remove_sysfs_files(a)
346 #endif
347
348 /* *********************************************** */
349 /*
350 * This function is called as an URB transfert is complete (Isochronous pipe).
351 * So, the traitement is done in interrupt time, so it has be fast, not crash,
352 * and not stall. Neat.
353 */
354 static void stk_isoc_handler(struct urb *urb)
355 {
356 int i;
357 int ret;
358 int framelen;
359 unsigned long flags;
360
361 unsigned char *fill = NULL;
362 unsigned char *iso_buf = NULL;
363
364 struct stk_camera *dev;
365 struct stk_sio_buffer *fb;
366
367 dev = (struct stk_camera *) urb->context;
368
369 if (dev == NULL) {
370 STK_ERROR("isoc_handler called with NULL device !\n");
371 return;
372 }
373
374 if (urb->status == -ENOENT || urb->status == -ECONNRESET
375 || urb->status == -ESHUTDOWN) {
376 atomic_dec(&dev->urbs_used);
377 return;
378 }
379
380 spin_lock_irqsave(&dev->spinlock, flags);
381
382 if (urb->status != -EINPROGRESS && urb->status != 0) {
383 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
384 goto resubmit;
385 }
386
387 if (list_empty(&dev->sio_avail)) {
388 /*FIXME Stop streaming after a while */
389 (void) (printk_ratelimit() &&
390 STK_ERROR("isoc_handler without available buffer!\n"));
391 goto resubmit;
392 }
393 fb = list_first_entry(&dev->sio_avail,
394 struct stk_sio_buffer, list);
395 fill = fb->buffer + fb->v4lbuf.bytesused;
396
397 for (i = 0; i < urb->number_of_packets; i++) {
398 if (urb->iso_frame_desc[i].status != 0) {
399 if (urb->iso_frame_desc[i].status != -EXDEV)
400 STK_ERROR("Frame %d has error %d\n", i,
401 urb->iso_frame_desc[i].status);
402 continue;
403 }
404 framelen = urb->iso_frame_desc[i].actual_length;
405 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
406
407 if (framelen <= 4)
408 continue; /* no data */
409
410 /*
411 * we found something informational from there
412 * the isoc frames have to type of headers
413 * type1: 00 xx 00 00 or 20 xx 00 00
414 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
415 * xx is a sequencer which has never been seen over 0x3f
416 * imho data written down looks like bayer, i see similarities
417 * after every 640 bytes
418 */
419 if (*iso_buf & 0x80) {
420 framelen -= 8;
421 iso_buf += 8;
422 /* This marks a new frame */
423 if (fb->v4lbuf.bytesused != 0
424 && fb->v4lbuf.bytesused != dev->frame_size) {
425 (void) (printk_ratelimit() &&
426 STK_ERROR("frame %d, "
427 "bytesused=%d, skipping\n",
428 i, fb->v4lbuf.bytesused));
429 fb->v4lbuf.bytesused = 0;
430 fill = fb->buffer;
431 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
432 if (list_is_singular(&dev->sio_avail)) {
433 /* Always reuse the last buffer */
434 fb->v4lbuf.bytesused = 0;
435 fill = fb->buffer;
436 } else {
437 list_move_tail(dev->sio_avail.next,
438 &dev->sio_full);
439 wake_up(&dev->wait_frame);
440 fb = list_first_entry(&dev->sio_avail,
441 struct stk_sio_buffer, list);
442 fb->v4lbuf.bytesused = 0;
443 fill = fb->buffer;
444 }
445 }
446 } else {
447 framelen -= 4;
448 iso_buf += 4;
449 }
450
451 /* Our buffer is full !!! */
452 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
453 (void) (printk_ratelimit() &&
454 STK_ERROR("Frame buffer overflow, lost sync\n"));
455 /*FIXME Do something here? */
456 continue;
457 }
458 spin_unlock_irqrestore(&dev->spinlock, flags);
459 memcpy(fill, iso_buf, framelen);
460 spin_lock_irqsave(&dev->spinlock, flags);
461 fill += framelen;
462
463 /* New size of our buffer */
464 fb->v4lbuf.bytesused += framelen;
465 }
466
467 resubmit:
468 spin_unlock_irqrestore(&dev->spinlock, flags);
469 urb->dev = dev->udev;
470 ret = usb_submit_urb(urb, GFP_ATOMIC);
471 if (ret != 0) {
472 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
473 ret);
474 }
475 }
476
477 /* -------------------------------------------- */
478
479 static int stk_prepare_iso(struct stk_camera *dev)
480 {
481 void *kbuf;
482 int i, j;
483 struct urb *urb;
484 struct usb_device *udev;
485
486 if (dev == NULL)
487 return -ENXIO;
488 udev = dev->udev;
489
490 if (dev->isobufs)
491 STK_ERROR("isobufs already allocated. Bad\n");
492 else
493 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
494 GFP_KERNEL);
495 if (dev->isobufs == NULL) {
496 STK_ERROR("Unable to allocate iso buffers\n");
497 return -ENOMEM;
498 }
499 for (i = 0; i < MAX_ISO_BUFS; i++) {
500 if (dev->isobufs[i].data == NULL) {
501 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
502 if (kbuf == NULL) {
503 STK_ERROR("Failed to allocate iso buffer %d\n",
504 i);
505 goto isobufs_out;
506 }
507 dev->isobufs[i].data = kbuf;
508 } else
509 STK_ERROR("isobuf data already allocated\n");
510 if (dev->isobufs[i].urb == NULL) {
511 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
512 if (urb == NULL) {
513 STK_ERROR("Failed to allocate URB %d\n", i);
514 goto isobufs_out;
515 }
516 dev->isobufs[i].urb = urb;
517 } else {
518 STK_ERROR("Killing URB\n");
519 usb_kill_urb(dev->isobufs[i].urb);
520 urb = dev->isobufs[i].urb;
521 }
522 urb->interval = 1;
523 urb->dev = udev;
524 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
525 urb->transfer_flags = URB_ISO_ASAP;
526 urb->transfer_buffer = dev->isobufs[i].data;
527 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
528 urb->complete = stk_isoc_handler;
529 urb->context = dev;
530 urb->start_frame = 0;
531 urb->number_of_packets = ISO_FRAMES_PER_DESC;
532
533 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
534 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
535 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
536 }
537 }
538 set_memallocd(dev);
539 return 0;
540
541 isobufs_out:
542 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
543 kfree(dev->isobufs[i].data);
544 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
545 usb_free_urb(dev->isobufs[i].urb);
546 kfree(dev->isobufs);
547 dev->isobufs = NULL;
548 return -ENOMEM;
549 }
550
551 static void stk_clean_iso(struct stk_camera *dev)
552 {
553 int i;
554
555 if (dev == NULL || dev->isobufs == NULL)
556 return;
557
558 for (i = 0; i < MAX_ISO_BUFS; i++) {
559 struct urb *urb;
560
561 urb = dev->isobufs[i].urb;
562 if (urb) {
563 if (atomic_read(&dev->urbs_used) && is_present(dev))
564 usb_kill_urb(urb);
565 usb_free_urb(urb);
566 }
567 kfree(dev->isobufs[i].data);
568 }
569 kfree(dev->isobufs);
570 dev->isobufs = NULL;
571 unset_memallocd(dev);
572 }
573
574 static int stk_setup_siobuf(struct stk_camera *dev, int index)
575 {
576 struct stk_sio_buffer *buf = dev->sio_bufs + index;
577 INIT_LIST_HEAD(&buf->list);
578 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
579 buf->buffer = vmalloc_user(buf->v4lbuf.length);
580 if (buf->buffer == NULL)
581 return -ENOMEM;
582 buf->mapcount = 0;
583 buf->dev = dev;
584 buf->v4lbuf.index = index;
585 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
586 buf->v4lbuf.field = V4L2_FIELD_NONE;
587 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
588 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
589 return 0;
590 }
591
592 static int stk_free_sio_buffers(struct stk_camera *dev)
593 {
594 int i;
595 int nbufs;
596 unsigned long flags;
597 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
598 return 0;
599 /*
600 * If any buffers are mapped, we cannot free them at all.
601 */
602 for (i = 0; i < dev->n_sbufs; i++) {
603 if (dev->sio_bufs[i].mapcount > 0)
604 return -EBUSY;
605 }
606 /*
607 * OK, let's do it.
608 */
609 spin_lock_irqsave(&dev->spinlock, flags);
610 INIT_LIST_HEAD(&dev->sio_avail);
611 INIT_LIST_HEAD(&dev->sio_full);
612 nbufs = dev->n_sbufs;
613 dev->n_sbufs = 0;
614 spin_unlock_irqrestore(&dev->spinlock, flags);
615 for (i = 0; i < nbufs; i++) {
616 if (dev->sio_bufs[i].buffer != NULL)
617 vfree(dev->sio_bufs[i].buffer);
618 }
619 kfree(dev->sio_bufs);
620 dev->sio_bufs = NULL;
621 return 0;
622 }
623
624 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
625 {
626 int i;
627 if (dev->sio_bufs != NULL)
628 STK_ERROR("sio_bufs already allocated\n");
629 else {
630 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
631 GFP_KERNEL);
632 if (dev->sio_bufs == NULL)
633 return -ENOMEM;
634 for (i = 0; i < n_sbufs; i++) {
635 if (stk_setup_siobuf(dev, i))
636 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
637 dev->n_sbufs = i+1;
638 }
639 }
640 return 0;
641 }
642
643 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
644 {
645 int err;
646 err = stk_prepare_iso(dev);
647 if (err) {
648 stk_clean_iso(dev);
649 return err;
650 }
651 err = stk_prepare_sio_buffers(dev, n_sbufs);
652 if (err) {
653 stk_free_sio_buffers(dev);
654 return err;
655 }
656 return 0;
657 }
658
659 static void stk_free_buffers(struct stk_camera *dev)
660 {
661 stk_clean_iso(dev);
662 stk_free_sio_buffers(dev);
663 }
664 /* -------------------------------------------- */
665
666 /* v4l file operations */
667
668 static int v4l_stk_open(struct file *fp)
669 {
670 struct stk_camera *dev;
671 struct video_device *vdev;
672
673 vdev = video_devdata(fp);
674 dev = vdev_to_camera(vdev);
675
676 lock_kernel();
677 if (dev == NULL || !is_present(dev)) {
678 unlock_kernel();
679 return -ENXIO;
680 }
681 fp->private_data = dev;
682 usb_autopm_get_interface(dev->interface);
683 unlock_kernel();
684
685 return 0;
686 }
687
688 static int v4l_stk_release(struct file *fp)
689 {
690 struct stk_camera *dev = fp->private_data;
691
692 if (dev->owner == fp) {
693 stk_stop_stream(dev);
694 stk_free_buffers(dev);
695 dev->owner = NULL;
696 }
697
698 if(is_present(dev))
699 usb_autopm_put_interface(dev->interface);
700
701 return 0;
702 }
703
704 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
705 size_t count, loff_t *f_pos)
706 {
707 int i;
708 int ret;
709 unsigned long flags;
710 struct stk_sio_buffer *sbuf;
711 struct stk_camera *dev = fp->private_data;
712
713 if (!is_present(dev))
714 return -EIO;
715 if (dev->owner && dev->owner != fp)
716 return -EBUSY;
717 dev->owner = fp;
718 if (!is_streaming(dev)) {
719 if (stk_initialise(dev)
720 || stk_allocate_buffers(dev, 3)
721 || stk_start_stream(dev))
722 return -ENOMEM;
723 spin_lock_irqsave(&dev->spinlock, flags);
724 for (i = 0; i < dev->n_sbufs; i++) {
725 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
726 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
727 }
728 spin_unlock_irqrestore(&dev->spinlock, flags);
729 }
730 if (*f_pos == 0) {
731 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
732 return -EWOULDBLOCK;
733 ret = wait_event_interruptible(dev->wait_frame,
734 !list_empty(&dev->sio_full) || !is_present(dev));
735 if (ret)
736 return ret;
737 if (!is_present(dev))
738 return -EIO;
739 }
740 if (count + *f_pos > dev->frame_size)
741 count = dev->frame_size - *f_pos;
742 spin_lock_irqsave(&dev->spinlock, flags);
743 if (list_empty(&dev->sio_full)) {
744 spin_unlock_irqrestore(&dev->spinlock, flags);
745 STK_ERROR("BUG: No siobufs ready\n");
746 return 0;
747 }
748 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
749 spin_unlock_irqrestore(&dev->spinlock, flags);
750
751 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
752 return -EFAULT;
753
754 *f_pos += count;
755
756 if (*f_pos >= dev->frame_size) {
757 *f_pos = 0;
758 spin_lock_irqsave(&dev->spinlock, flags);
759 list_move_tail(&sbuf->list, &dev->sio_avail);
760 spin_unlock_irqrestore(&dev->spinlock, flags);
761 }
762 return count;
763 }
764
765 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
766 {
767 struct stk_camera *dev = fp->private_data;
768
769 poll_wait(fp, &dev->wait_frame, wait);
770
771 if (!is_present(dev))
772 return POLLERR;
773
774 if (!list_empty(&dev->sio_full))
775 return (POLLIN | POLLRDNORM);
776
777 return 0;
778 }
779
780
781 static void stk_v4l_vm_open(struct vm_area_struct *vma)
782 {
783 struct stk_sio_buffer *sbuf = vma->vm_private_data;
784 sbuf->mapcount++;
785 }
786 static void stk_v4l_vm_close(struct vm_area_struct *vma)
787 {
788 struct stk_sio_buffer *sbuf = vma->vm_private_data;
789 sbuf->mapcount--;
790 if (sbuf->mapcount == 0)
791 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
792 }
793 static const struct vm_operations_struct stk_v4l_vm_ops = {
794 .open = stk_v4l_vm_open,
795 .close = stk_v4l_vm_close
796 };
797
798 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
799 {
800 unsigned int i;
801 int ret;
802 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
803 struct stk_camera *dev = fp->private_data;
804 struct stk_sio_buffer *sbuf = NULL;
805
806 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
807 return -EINVAL;
808
809 for (i = 0; i < dev->n_sbufs; i++) {
810 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
811 sbuf = dev->sio_bufs + i;
812 break;
813 }
814 }
815 if (sbuf == NULL)
816 return -EINVAL;
817 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
818 if (ret)
819 return ret;
820 vma->vm_flags |= VM_DONTEXPAND;
821 vma->vm_private_data = sbuf;
822 vma->vm_ops = &stk_v4l_vm_ops;
823 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
824 stk_v4l_vm_open(vma);
825 return 0;
826 }
827
828 /* v4l ioctl handlers */
829
830 static int stk_vidioc_querycap(struct file *filp,
831 void *priv, struct v4l2_capability *cap)
832 {
833 strcpy(cap->driver, "stk");
834 strcpy(cap->card, "stk");
835 cap->version = DRIVER_VERSION_NUM;
836
837 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
838 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
839 return 0;
840 }
841
842 static int stk_vidioc_enum_input(struct file *filp,
843 void *priv, struct v4l2_input *input)
844 {
845 if (input->index != 0)
846 return -EINVAL;
847
848 strcpy(input->name, "Syntek USB Camera");
849 input->type = V4L2_INPUT_TYPE_CAMERA;
850 return 0;
851 }
852
853
854 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
855 {
856 *i = 0;
857 return 0;
858 }
859
860 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
861 {
862 if (i != 0)
863 return -EINVAL;
864 else
865 return 0;
866 }
867
868 /* from vivi.c */
869 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
870 {
871 return 0;
872 }
873
874 /* List of all V4Lv2 controls supported by the driver */
875 static struct v4l2_queryctrl stk_controls[] = {
876 {
877 .id = V4L2_CID_BRIGHTNESS,
878 .type = V4L2_CTRL_TYPE_INTEGER,
879 .name = "Brightness",
880 .minimum = 0,
881 .maximum = 0xffff,
882 .step = 0x0100,
883 .default_value = 0x6000,
884 },
885 /*TODO: get more controls to work */
886 };
887
888 static int stk_vidioc_queryctrl(struct file *filp,
889 void *priv, struct v4l2_queryctrl *c)
890 {
891 int i;
892 int nbr;
893 nbr = ARRAY_SIZE(stk_controls);
894
895 for (i = 0; i < nbr; i++) {
896 if (stk_controls[i].id == c->id) {
897 memcpy(c, &stk_controls[i],
898 sizeof(struct v4l2_queryctrl));
899 return 0;
900 }
901 }
902 return -EINVAL;
903 }
904
905 static int stk_vidioc_g_ctrl(struct file *filp,
906 void *priv, struct v4l2_control *c)
907 {
908 struct stk_camera *dev = priv;
909 switch (c->id) {
910 case V4L2_CID_BRIGHTNESS:
911 c->value = dev->vsettings.brightness;
912 break;
913 default:
914 return -EINVAL;
915 }
916 return 0;
917 }
918
919 static int stk_vidioc_s_ctrl(struct file *filp,
920 void *priv, struct v4l2_control *c)
921 {
922 struct stk_camera *dev = priv;
923 switch (c->id) {
924 case V4L2_CID_BRIGHTNESS:
925 dev->vsettings.brightness = c->value;
926 return stk_sensor_set_brightness(dev, c->value >> 8);
927 default:
928 return -EINVAL;
929 }
930 return 0;
931 }
932
933
934 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
935 void *priv, struct v4l2_fmtdesc *fmtd)
936 {
937 switch (fmtd->index) {
938 case 0:
939 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
940 strcpy(fmtd->description, "r5g6b5");
941 break;
942 case 1:
943 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
944 strcpy(fmtd->description, "r5g6b5BE");
945 break;
946 case 2:
947 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
948 strcpy(fmtd->description, "yuv4:2:2");
949 break;
950 case 3:
951 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
952 strcpy(fmtd->description, "Raw bayer");
953 break;
954 case 4:
955 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
956 strcpy(fmtd->description, "yuv4:2:2");
957 break;
958 default:
959 return -EINVAL;
960 }
961 return 0;
962 }
963
964 static struct stk_size {
965 unsigned w;
966 unsigned h;
967 enum stk_mode m;
968 } stk_sizes[] = {
969 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
970 { .w = 640, .h = 480, .m = MODE_VGA, },
971 { .w = 352, .h = 288, .m = MODE_CIF, },
972 { .w = 320, .h = 240, .m = MODE_QVGA, },
973 { .w = 176, .h = 144, .m = MODE_QCIF, },
974 };
975
976 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
977 void *priv, struct v4l2_format *f)
978 {
979 struct v4l2_pix_format *pix_format = &f->fmt.pix;
980 struct stk_camera *dev = priv;
981 int i;
982
983 for (i = 0; i < ARRAY_SIZE(stk_sizes)
984 && stk_sizes[i].m != dev->vsettings.mode;
985 i++);
986 if (i == ARRAY_SIZE(stk_sizes)) {
987 STK_ERROR("ERROR: mode invalid\n");
988 return -EINVAL;
989 }
990 pix_format->width = stk_sizes[i].w;
991 pix_format->height = stk_sizes[i].h;
992 pix_format->field = V4L2_FIELD_NONE;
993 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
994 pix_format->pixelformat = dev->vsettings.palette;
995 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
996 pix_format->bytesperline = pix_format->width;
997 else
998 pix_format->bytesperline = 2 * pix_format->width;
999 pix_format->sizeimage = pix_format->bytesperline
1000 * pix_format->height;
1001 return 0;
1002 }
1003
1004 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1005 void *priv, struct v4l2_format *fmtd)
1006 {
1007 int i;
1008 switch (fmtd->fmt.pix.pixelformat) {
1009 case V4L2_PIX_FMT_RGB565:
1010 case V4L2_PIX_FMT_RGB565X:
1011 case V4L2_PIX_FMT_UYVY:
1012 case V4L2_PIX_FMT_YUYV:
1013 case V4L2_PIX_FMT_SBGGR8:
1014 break;
1015 default:
1016 return -EINVAL;
1017 }
1018 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1019 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1020 break;
1021 }
1022 if (i == ARRAY_SIZE(stk_sizes)
1023 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1024 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1025 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1026 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1027 fmtd->fmt.pix.priv = i - 1;
1028 } else {
1029 fmtd->fmt.pix.height = stk_sizes[i].h;
1030 fmtd->fmt.pix.width = stk_sizes[i].w;
1031 fmtd->fmt.pix.priv = i;
1032 }
1033
1034 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1035 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1036 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1037 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1038 else
1039 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1040 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1041 * fmtd->fmt.pix.height;
1042 return 0;
1043 }
1044
1045 static int stk_setup_format(struct stk_camera *dev)
1046 {
1047 int i = 0;
1048 int depth;
1049 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1050 depth = 1;
1051 else
1052 depth = 2;
1053 while (i < ARRAY_SIZE(stk_sizes) &&
1054 stk_sizes[i].m != dev->vsettings.mode)
1055 i++;
1056 if (i == ARRAY_SIZE(stk_sizes)) {
1057 STK_ERROR("Something is broken in %s\n", __func__);
1058 return -EFAULT;
1059 }
1060 /* This registers controls some timings, not sure of what. */
1061 stk_camera_write_reg(dev, 0x001b, 0x0e);
1062 if (dev->vsettings.mode == MODE_SXGA)
1063 stk_camera_write_reg(dev, 0x001c, 0x0e);
1064 else
1065 stk_camera_write_reg(dev, 0x001c, 0x46);
1066 /*
1067 * Registers 0x0115 0x0114 are the size of each line (bytes),
1068 * regs 0x0117 0x0116 are the heigth of the image.
1069 */
1070 stk_camera_write_reg(dev, 0x0115,
1071 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1072 stk_camera_write_reg(dev, 0x0114,
1073 (stk_sizes[i].w * depth) & 0xff);
1074 stk_camera_write_reg(dev, 0x0117,
1075 (stk_sizes[i].h >> 8) & 0xff);
1076 stk_camera_write_reg(dev, 0x0116,
1077 stk_sizes[i].h & 0xff);
1078 return stk_sensor_configure(dev);
1079 }
1080
1081 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1082 void *priv, struct v4l2_format *fmtd)
1083 {
1084 int ret;
1085 struct stk_camera *dev = priv;
1086
1087 if (dev == NULL)
1088 return -ENODEV;
1089 if (!is_present(dev))
1090 return -ENODEV;
1091 if (is_streaming(dev))
1092 return -EBUSY;
1093 if (dev->owner && dev->owner != filp)
1094 return -EBUSY;
1095 ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1096 if (ret)
1097 return ret;
1098 dev->owner = filp;
1099
1100 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1101 stk_free_buffers(dev);
1102 dev->frame_size = fmtd->fmt.pix.sizeimage;
1103 dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1104
1105 stk_initialise(dev);
1106 return stk_setup_format(dev);
1107 }
1108
1109 static int stk_vidioc_reqbufs(struct file *filp,
1110 void *priv, struct v4l2_requestbuffers *rb)
1111 {
1112 struct stk_camera *dev = priv;
1113
1114 if (dev == NULL)
1115 return -ENODEV;
1116 if (rb->memory != V4L2_MEMORY_MMAP)
1117 return -EINVAL;
1118 if (is_streaming(dev)
1119 || (dev->owner && dev->owner != filp))
1120 return -EBUSY;
1121 dev->owner = filp;
1122
1123 /*FIXME If they ask for zero, we must stop streaming and free */
1124 if (rb->count < 3)
1125 rb->count = 3;
1126 /* Arbitrary limit */
1127 else if (rb->count > 5)
1128 rb->count = 5;
1129
1130 stk_allocate_buffers(dev, rb->count);
1131 rb->count = dev->n_sbufs;
1132 return 0;
1133 }
1134
1135 static int stk_vidioc_querybuf(struct file *filp,
1136 void *priv, struct v4l2_buffer *buf)
1137 {
1138 struct stk_camera *dev = priv;
1139 struct stk_sio_buffer *sbuf;
1140
1141 if (buf->index >= dev->n_sbufs)
1142 return -EINVAL;
1143 sbuf = dev->sio_bufs + buf->index;
1144 *buf = sbuf->v4lbuf;
1145 return 0;
1146 }
1147
1148 static int stk_vidioc_qbuf(struct file *filp,
1149 void *priv, struct v4l2_buffer *buf)
1150 {
1151 struct stk_camera *dev = priv;
1152 struct stk_sio_buffer *sbuf;
1153 unsigned long flags;
1154
1155 if (buf->memory != V4L2_MEMORY_MMAP)
1156 return -EINVAL;
1157
1158 if (buf->index >= dev->n_sbufs)
1159 return -EINVAL;
1160 sbuf = dev->sio_bufs + buf->index;
1161 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1162 return 0;
1163 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1164 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1165 spin_lock_irqsave(&dev->spinlock, flags);
1166 list_add_tail(&sbuf->list, &dev->sio_avail);
1167 *buf = sbuf->v4lbuf;
1168 spin_unlock_irqrestore(&dev->spinlock, flags);
1169 return 0;
1170 }
1171
1172 static int stk_vidioc_dqbuf(struct file *filp,
1173 void *priv, struct v4l2_buffer *buf)
1174 {
1175 struct stk_camera *dev = priv;
1176 struct stk_sio_buffer *sbuf;
1177 unsigned long flags;
1178 int ret;
1179
1180 if (!is_streaming(dev))
1181 return -EINVAL;
1182
1183 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1184 return -EWOULDBLOCK;
1185 ret = wait_event_interruptible(dev->wait_frame,
1186 !list_empty(&dev->sio_full) || !is_present(dev));
1187 if (ret)
1188 return ret;
1189 if (!is_present(dev))
1190 return -EIO;
1191
1192 spin_lock_irqsave(&dev->spinlock, flags);
1193 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1194 list_del_init(&sbuf->list);
1195 spin_unlock_irqrestore(&dev->spinlock, flags);
1196 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1197 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1198 sbuf->v4lbuf.sequence = ++dev->sequence;
1199 do_gettimeofday(&sbuf->v4lbuf.timestamp);
1200
1201 *buf = sbuf->v4lbuf;
1202 return 0;
1203 }
1204
1205 static int stk_vidioc_streamon(struct file *filp,
1206 void *priv, enum v4l2_buf_type type)
1207 {
1208 struct stk_camera *dev = priv;
1209 if (is_streaming(dev))
1210 return 0;
1211 if (dev->sio_bufs == NULL)
1212 return -EINVAL;
1213 dev->sequence = 0;
1214 return stk_start_stream(dev);
1215 }
1216
1217 static int stk_vidioc_streamoff(struct file *filp,
1218 void *priv, enum v4l2_buf_type type)
1219 {
1220 struct stk_camera *dev = priv;
1221 unsigned long flags;
1222 int i;
1223 stk_stop_stream(dev);
1224 spin_lock_irqsave(&dev->spinlock, flags);
1225 INIT_LIST_HEAD(&dev->sio_avail);
1226 INIT_LIST_HEAD(&dev->sio_full);
1227 for (i = 0; i < dev->n_sbufs; i++) {
1228 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1229 dev->sio_bufs[i].v4lbuf.flags = 0;
1230 }
1231 spin_unlock_irqrestore(&dev->spinlock, flags);
1232 return 0;
1233 }
1234
1235
1236 static int stk_vidioc_g_parm(struct file *filp,
1237 void *priv, struct v4l2_streamparm *sp)
1238 {
1239 /*FIXME This is not correct */
1240 sp->parm.capture.timeperframe.numerator = 1;
1241 sp->parm.capture.timeperframe.denominator = 30;
1242 sp->parm.capture.readbuffers = 2;
1243 return 0;
1244 }
1245
1246 static int stk_vidioc_enum_framesizes(struct file *filp,
1247 void *priv, struct v4l2_frmsizeenum *frms)
1248 {
1249 if (frms->index >= ARRAY_SIZE(stk_sizes))
1250 return -EINVAL;
1251 switch (frms->pixel_format) {
1252 case V4L2_PIX_FMT_RGB565:
1253 case V4L2_PIX_FMT_RGB565X:
1254 case V4L2_PIX_FMT_UYVY:
1255 case V4L2_PIX_FMT_YUYV:
1256 case V4L2_PIX_FMT_SBGGR8:
1257 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1258 frms->discrete.width = stk_sizes[frms->index].w;
1259 frms->discrete.height = stk_sizes[frms->index].h;
1260 return 0;
1261 default: return -EINVAL;
1262 }
1263 }
1264
1265 static struct v4l2_file_operations v4l_stk_fops = {
1266 .owner = THIS_MODULE,
1267 .open = v4l_stk_open,
1268 .release = v4l_stk_release,
1269 .read = v4l_stk_read,
1270 .poll = v4l_stk_poll,
1271 .mmap = v4l_stk_mmap,
1272 .ioctl = video_ioctl2,
1273 };
1274
1275 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1276 .vidioc_querycap = stk_vidioc_querycap,
1277 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1278 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1279 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1280 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1281 .vidioc_enum_input = stk_vidioc_enum_input,
1282 .vidioc_s_input = stk_vidioc_s_input,
1283 .vidioc_g_input = stk_vidioc_g_input,
1284 .vidioc_s_std = stk_vidioc_s_std,
1285 .vidioc_reqbufs = stk_vidioc_reqbufs,
1286 .vidioc_querybuf = stk_vidioc_querybuf,
1287 .vidioc_qbuf = stk_vidioc_qbuf,
1288 .vidioc_dqbuf = stk_vidioc_dqbuf,
1289 .vidioc_streamon = stk_vidioc_streamon,
1290 .vidioc_streamoff = stk_vidioc_streamoff,
1291 .vidioc_queryctrl = stk_vidioc_queryctrl,
1292 .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1293 .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1294 .vidioc_g_parm = stk_vidioc_g_parm,
1295 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1296 };
1297
1298 static void stk_v4l_dev_release(struct video_device *vd)
1299 {
1300 struct stk_camera *dev = vdev_to_camera(vd);
1301
1302 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1303 STK_ERROR("We are leaking memory\n");
1304 usb_put_intf(dev->interface);
1305 kfree(dev);
1306 }
1307
1308 static struct video_device stk_v4l_data = {
1309 .name = "stkwebcam",
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 device %s\n",
1330 video_device_node_name(&dev->vdev));
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
1403 return 0;
1404
1405 error:
1406 kfree(dev);
1407 return err;
1408 }
1409
1410 static void stk_camera_disconnect(struct usb_interface *interface)
1411 {
1412 struct stk_camera *dev = usb_get_intfdata(interface);
1413
1414 usb_set_intfdata(interface, NULL);
1415 unset_present(dev);
1416
1417 wake_up_interruptible(&dev->wait_frame);
1418 stk_remove_sysfs_files(&dev->vdev);
1419
1420 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1421 video_device_node_name(&dev->vdev));
1422
1423 video_unregister_device(&dev->vdev);
1424 }
1425
1426 #ifdef CONFIG_PM
1427 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1428 {
1429 struct stk_camera *dev = usb_get_intfdata(intf);
1430 if (is_streaming(dev)) {
1431 stk_stop_stream(dev);
1432 /* yes, this is ugly */
1433 set_streaming(dev);
1434 }
1435 return 0;
1436 }
1437
1438 static int stk_camera_resume(struct usb_interface *intf)
1439 {
1440 struct stk_camera *dev = usb_get_intfdata(intf);
1441 if (!is_initialised(dev))
1442 return 0;
1443 unset_initialised(dev);
1444 stk_initialise(dev);
1445 stk_setup_format(dev);
1446 if (is_streaming(dev))
1447 stk_start_stream(dev);
1448 return 0;
1449 }
1450 #endif
1451
1452 static struct usb_driver stk_camera_driver = {
1453 .name = "stkwebcam",
1454 .probe = stk_camera_probe,
1455 .disconnect = stk_camera_disconnect,
1456 .id_table = stkwebcam_table,
1457 #ifdef CONFIG_PM
1458 .suspend = stk_camera_suspend,
1459 .resume = stk_camera_resume,
1460 #endif
1461 };
1462
1463
1464 static int __init stk_camera_init(void)
1465 {
1466 int result;
1467
1468 result = usb_register(&stk_camera_driver);
1469 if (result)
1470 STK_ERROR("usb_register failed ! Error number %d\n", result);
1471
1472
1473 return result;
1474 }
1475
1476 static void __exit stk_camera_exit(void)
1477 {
1478 usb_deregister(&stk_camera_driver);
1479 }
1480
1481 module_init(stk_camera_init);
1482 module_exit(stk_camera_exit);
1483
1484
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree