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-rw-r--r--drivers/media/video/stk-webcam.c1465
1 files changed, 1465 insertions, 0 deletions
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
new file mode 100644
index 000000000000..d37e5e2594b4
--- /dev/null
+++ b/drivers/media/video/stk-webcam.c
@@ -0,0 +1,1465 @@
1/*
2 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
3 *
4 * Copyright (C) 2006 Nicolas VIVIEN
5 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
6 *
7 * Some parts are inspired from cafe_ccic.c
8 * Copyright 2006-2007 Jonathan Corbet
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/errno.h>
29#include <linux/slab.h>
30#include <linux/kref.h>
31
32#include <linux/usb.h>
33#include <linux/vmalloc.h>
34#include <linux/videodev2.h>
35#include <media/v4l2-common.h>
36
37#include "stk-webcam.h"
38
39
40static int hflip = 1;
41module_param(hflip, bool, 0444);
42MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
43
44static int vflip = 1;
45module_param(vflip, bool, 0444);
46MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
47
48static int debug;
49module_param(debug, int, 0444);
50MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
51
52MODULE_LICENSE("GPL");
53MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
54MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
55
56
57
58/* Some cameras have audio interfaces, we aren't interested in those */
59static struct usb_device_id stkwebcam_table[] = {
60 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
61 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
62 { }
63};
64MODULE_DEVICE_TABLE(usb, stkwebcam_table);
65
66void stk_camera_cleanup(struct kref *kref)
67{
68 struct stk_camera *dev = to_stk_camera(kref);
69
70 STK_INFO("Syntek USB2.0 Camera release resources"
71 " video device /dev/video%d\n", dev->vdev.minor);
72 video_unregister_device(&dev->vdev);
73 dev->vdev.priv = NULL;
74
75 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
76 STK_ERROR("We are leaking memory\n");
77 usb_put_intf(dev->interface);
78 kfree(dev);
79}
80
81
82/*
83 * Basic stuff
84 */
85int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
86{
87 struct usb_device *udev = dev->udev;
88 int ret;
89
90 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
91 0x01,
92 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
93 value,
94 index,
95 NULL,
96 0,
97 500);
98 if (ret < 0)
99 return ret;
100 else
101 return 0;
102}
103
104int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
105{
106 struct usb_device *udev = dev->udev;
107 int ret;
108
109 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
110 0x00,
111 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
112 0x00,
113 index,
114 (u8 *) value,
115 sizeof(u8),
116 500);
117 if (ret < 0)
118 return ret;
119 else
120 return 0;
121}
122
123static int stk_start_stream(struct stk_camera *dev)
124{
125 int value;
126 int i, ret;
127 int value_116, value_117;
128
129 if (!is_present(dev))
130 return -ENODEV;
131 if (!is_memallocd(dev) || !is_initialised(dev)) {
132 STK_ERROR("FIXME: Buffers are not allocated\n");
133 return -EFAULT;
134 }
135 ret = usb_set_interface(dev->udev, 0, 5);
136
137 if (ret < 0)
138 STK_ERROR("usb_set_interface failed !\n");
139 if (stk_sensor_wakeup(dev))
140 STK_ERROR("error awaking the sensor\n");
141
142 stk_camera_read_reg(dev, 0x0116, &value_116);
143 stk_camera_read_reg(dev, 0x0117, &value_117);
144
145 stk_camera_write_reg(dev, 0x0116, 0x0000);
146 stk_camera_write_reg(dev, 0x0117, 0x0000);
147
148 stk_camera_read_reg(dev, 0x0100, &value);
149 stk_camera_write_reg(dev, 0x0100, value | 0x80);
150
151 stk_camera_write_reg(dev, 0x0116, value_116);
152 stk_camera_write_reg(dev, 0x0117, value_117);
153 for (i = 0; i < MAX_ISO_BUFS; i++) {
154 if (dev->isobufs[i].urb) {
155 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
156 atomic_inc(&dev->urbs_used);
157 if (ret)
158 return ret;
159 }
160 }
161 set_streaming(dev);
162 return 0;
163}
164
165static int stk_stop_stream(struct stk_camera *dev)
166{
167 int value;
168 int i;
169 if (is_present(dev)) {
170 stk_camera_read_reg(dev, 0x0100, &value);
171 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
172 if (dev->isobufs != NULL) {
173 for (i = 0; i < MAX_ISO_BUFS; i++) {
174 if (dev->isobufs[i].urb)
175 usb_kill_urb(dev->isobufs[i].urb);
176 }
177 }
178 unset_streaming(dev);
179
180 if (usb_set_interface(dev->udev, 0, 0))
181 STK_ERROR("usb_set_interface failed !\n");
182 if (stk_sensor_sleep(dev))
183 STK_ERROR("error suspending the sensor\n");
184 }
185 return 0;
186}
187
188/*
189 * This seems to be the shortest init sequence we
190 * must do in order to find the sensor
191 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
192 * is also reset. Maybe powers down it?
193 * Rest of values don't make a difference
194 */
195
196static struct regval stk1125_initvals[] = {
197 /*TODO: What means this sequence? */
198 {0x0000, 0x24},
199 {0x0100, 0x21},
200 {0x0002, 0x68},
201 {0x0003, 0x80},
202 {0x0005, 0x00},
203 {0x0007, 0x03},
204 {0x000d, 0x00},
205 {0x000f, 0x02},
206 {0x0300, 0x12},
207 {0x0350, 0x41},
208 {0x0351, 0x00},
209 {0x0352, 0x00},
210 {0x0353, 0x00},
211 {0x0018, 0x10},
212 {0x0019, 0x00},
213 {0x001b, 0x0e},
214 {0x001c, 0x46},
215 {0x0300, 0x80},
216 {0x001a, 0x04},
217 {0x0110, 0x00},
218 {0x0111, 0x00},
219 {0x0112, 0x00},
220 {0x0113, 0x00},
221
222 {0xffff, 0xff},
223};
224
225
226static int stk_initialise(struct stk_camera *dev)
227{
228 struct regval *rv;
229 int ret;
230 if (!is_present(dev))
231 return -ENODEV;
232 if (is_initialised(dev))
233 return 0;
234 rv = stk1125_initvals;
235 while (rv->reg != 0xffff) {
236 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
237 if (ret)
238 return ret;
239 rv++;
240 }
241 if (stk_sensor_init(dev) == 0) {
242 set_initialised(dev);
243 return 0;
244 } else
245 return -1;
246}
247
248/* sysfs functions */
249/*FIXME cleanup this */
250
251static ssize_t show_brightness(struct device *class,
252 struct device_attribute *attr, char *buf)
253{
254 struct video_device *vdev = to_video_device(class);
255 struct stk_camera *dev = vdev_to_camera(vdev);
256
257 return sprintf(buf, "%X\n", dev->vsettings.brightness);
258}
259
260static ssize_t store_brightness(struct device *class,
261 struct device_attribute *attr, const char *buf, size_t count)
262{
263 char *endp;
264 unsigned long value;
265 int ret;
266
267 struct video_device *vdev = to_video_device(class);
268 struct stk_camera *dev = vdev_to_camera(vdev);
269
270 value = simple_strtoul(buf, &endp, 16);
271
272 dev->vsettings.brightness = (int) value;
273
274 ret = stk_sensor_set_brightness(dev, value >> 8);
275 if (ret)
276 return ret;
277 else
278 return count;
279}
280
281static ssize_t show_hflip(struct device *class,
282 struct device_attribute *attr, char *buf)
283{
284 struct video_device *vdev = to_video_device(class);
285 struct stk_camera *dev = vdev_to_camera(vdev);
286
287 return sprintf(buf, "%d\n", dev->vsettings.hflip);
288}
289
290static ssize_t store_hflip(struct device *class,
291 struct device_attribute *attr, const char *buf, size_t count)
292{
293 struct video_device *vdev = to_video_device(class);
294 struct stk_camera *dev = vdev_to_camera(vdev);
295
296 if (strncmp(buf, "1", 1) == 0)
297 dev->vsettings.hflip = 1;
298 else if (strncmp(buf, "0", 1) == 0)
299 dev->vsettings.hflip = 0;
300 else
301 return -EINVAL;
302
303 return strlen(buf);
304}
305
306static ssize_t show_vflip(struct device *class,
307 struct device_attribute *attr, char *buf)
308{
309 struct video_device *vdev = to_video_device(class);
310 struct stk_camera *dev = vdev_to_camera(vdev);
311
312 return sprintf(buf, "%d\n", dev->vsettings.vflip);
313}
314
315static ssize_t store_vflip(struct device *class,
316 struct device_attribute *attr, const char *buf, size_t count)
317{
318 struct video_device *vdev = to_video_device(class);
319 struct stk_camera *dev = vdev_to_camera(vdev);
320
321 if (strncmp(buf, "1", 1) == 0)
322 dev->vsettings.vflip = 1;
323 else if (strncmp(buf, "0", 1) == 0)
324 dev->vsettings.vflip = 0;
325 else
326 return -EINVAL;
327
328 return strlen(buf);
329}
330
331static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
332 show_brightness, store_brightness);
333static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
334static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
335
336static int stk_create_sysfs_files(struct video_device *vdev)
337{
338 int ret;
339
340 ret = video_device_create_file(vdev, &dev_attr_brightness);
341 ret += video_device_create_file(vdev, &dev_attr_hflip);
342 ret += video_device_create_file(vdev, &dev_attr_vflip);
343 return ret;
344}
345
346static void stk_remove_sysfs_files(struct video_device *vdev)
347{
348 video_device_remove_file(vdev, &dev_attr_brightness);
349 video_device_remove_file(vdev, &dev_attr_hflip);
350 video_device_remove_file(vdev, &dev_attr_vflip);
351}
352
353
354/* *********************************************** */
355/*
356 * This function is called as an URB transfert is complete (Isochronous pipe).
357 * So, the traitement is done in interrupt time, so it has be fast, not crash,
358 * and not stall. Neat.
359 */
360static void stk_isoc_handler(struct urb *urb)
361{
362 int i;
363 int ret;
364 int framelen;
365 unsigned long flags;
366
367 unsigned char *fill = NULL;
368 unsigned char *iso_buf = NULL;
369
370 struct stk_camera *dev;
371 struct stk_sio_buffer *fb;
372
373 dev = (struct stk_camera *) urb->context;
374
375 if (dev == NULL) {
376 STK_ERROR("isoc_handler called with NULL device !\n");
377 return;
378 }
379
380 if (urb->status == -ENOENT || urb->status == -ECONNRESET
381 || urb->status == -ESHUTDOWN) {
382 atomic_dec(&dev->urbs_used);
383 return;
384 }
385
386 spin_lock_irqsave(&dev->spinlock, flags);
387
388 if (urb->status != -EINPROGRESS && urb->status != 0) {
389 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
390 goto resubmit;
391 }
392
393 if (list_empty(&dev->sio_avail)) {
394 /*FIXME Stop streaming after a while */
395 (void) (printk_ratelimit() &&
396 STK_ERROR("isoc_handler without available buffer!\n"));
397 goto resubmit;
398 }
399 fb = list_first_entry(&dev->sio_avail,
400 struct stk_sio_buffer, list);
401 fill = fb->buffer + fb->v4lbuf.bytesused;
402
403 for (i = 0; i < urb->number_of_packets; i++) {
404 if (urb->iso_frame_desc[i].status != 0) {
405 if (urb->iso_frame_desc[i].status != -EXDEV)
406 STK_ERROR("Frame %d has error %d\n", i,
407 urb->iso_frame_desc[i].status);
408 continue;
409 }
410 framelen = urb->iso_frame_desc[i].actual_length;
411 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
412
413 if (framelen <= 4)
414 continue; /* no data */
415
416 /*
417 * we found something informational from there
418 * the isoc frames have to type of headers
419 * type1: 00 xx 00 00 or 20 xx 00 00
420 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
421 * xx is a sequencer which has never been seen over 0x3f
422 * imho data written down looks like bayer, i see similarities
423 * after every 640 bytes
424 */
425 if (*iso_buf & 0x80) {
426 framelen -= 8;
427 iso_buf += 8;
428 /* This marks a new frame */
429 if (fb->v4lbuf.bytesused != 0
430 && fb->v4lbuf.bytesused != dev->frame_size) {
431 (void) (printk_ratelimit() &&
432 STK_ERROR("frame %d, "
433 "bytesused=%d, skipping\n",
434 i, fb->v4lbuf.bytesused));
435 fb->v4lbuf.bytesused = 0;
436 fill = fb->buffer;
437 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
438 list_move_tail(dev->sio_avail.next,
439 &dev->sio_full);
440 wake_up(&dev->wait_frame);
441 if (list_empty(&dev->sio_avail)) {
442 (void) (printk_ratelimit() &&
443 STK_ERROR("No buffer available\n"));
444 goto resubmit;
445 }
446 fb = list_first_entry(&dev->sio_avail,
447 struct stk_sio_buffer, list);
448 fb->v4lbuf.bytesused = 0;
449 fill = fb->buffer;
450 }
451 } else {
452 framelen -= 4;
453 iso_buf += 4;
454 }
455
456 /* Our buffer is full !!! */
457 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
458 (void) (printk_ratelimit() &&
459 STK_ERROR("Frame buffer overflow, lost sync\n"));
460 /*FIXME Do something here? */
461 continue;
462 }
463 spin_unlock_irqrestore(&dev->spinlock, flags);
464 memcpy(fill, iso_buf, framelen);
465 spin_lock_irqsave(&dev->spinlock, flags);
466 fill += framelen;
467
468 /* New size of our buffer */
469 fb->v4lbuf.bytesused += framelen;
470 }
471
472resubmit:
473 spin_unlock_irqrestore(&dev->spinlock, flags);
474 urb->dev = dev->udev;
475 ret = usb_submit_urb(urb, GFP_ATOMIC);
476 if (ret != 0) {
477 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
478 ret);
479 }
480}
481
482/* -------------------------------------------- */
483
484static int stk_prepare_iso(struct stk_camera *dev)
485{
486 void *kbuf;
487 int i, j;
488 struct urb *urb;
489 struct usb_device *udev;
490
491 if (dev == NULL)
492 return -ENXIO;
493 udev = dev->udev;
494
495 if (dev->isobufs)
496 STK_ERROR("isobufs already allocated. Bad\n");
497 else
498 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
499 GFP_KERNEL);
500 if (dev->isobufs == NULL) {
501 STK_ERROR("Unable to allocate iso buffers\n");
502 return -ENOMEM;
503 }
504 for (i = 0; i < MAX_ISO_BUFS; i++) {
505 if (dev->isobufs[i].data == NULL) {
506 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
507 if (kbuf == NULL) {
508 STK_ERROR("Failed to allocate iso buffer %d\n",
509 i);
510 goto isobufs_out;
511 }
512 dev->isobufs[i].data = kbuf;
513 } else
514 STK_ERROR("isobuf data already allocated\n");
515 if (dev->isobufs[i].urb == NULL) {
516 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
517 if (urb == NULL) {
518 STK_ERROR("Failed to allocate URB %d\n", i);
519 goto isobufs_out;
520 }
521 dev->isobufs[i].urb = urb;
522 } else {
523 STK_ERROR("Killing URB\n");
524 usb_kill_urb(dev->isobufs[i].urb);
525 urb = dev->isobufs[i].urb;
526 }
527 urb->interval = 1;
528 urb->dev = udev;
529 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
530 urb->transfer_flags = URB_ISO_ASAP;
531 urb->transfer_buffer = dev->isobufs[i].data;
532 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
533 urb->complete = stk_isoc_handler;
534 urb->context = dev;
535 urb->start_frame = 0;
536 urb->number_of_packets = ISO_FRAMES_PER_DESC;
537
538 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
539 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
540 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
541 }
542 }
543 set_memallocd(dev);
544 return 0;
545
546isobufs_out:
547 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
548 kfree(dev->isobufs[i].data);
549 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
550 usb_free_urb(dev->isobufs[i].urb);
551 kfree(dev->isobufs);
552 dev->isobufs = NULL;
553 return -ENOMEM;
554}
555
556static void stk_clean_iso(struct stk_camera *dev)
557{
558 int i;
559
560 if (dev == NULL || dev->isobufs == NULL)
561 return;
562
563 for (i = 0; i < MAX_ISO_BUFS; i++) {
564 struct urb *urb;
565
566 urb = dev->isobufs[i].urb;
567 if (urb) {
568 if (atomic_read(&dev->urbs_used))
569 usb_kill_urb(urb);
570 usb_free_urb(urb);
571 }
572 kfree(dev->isobufs[i].data);
573 }
574 kfree(dev->isobufs);
575 dev->isobufs = NULL;
576 unset_memallocd(dev);
577}
578
579static int stk_setup_siobuf(struct stk_camera *dev, int index)
580{
581 struct stk_sio_buffer *buf = dev->sio_bufs + index;
582 INIT_LIST_HEAD(&buf->list);
583 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
584 buf->buffer = vmalloc_user(buf->v4lbuf.length);
585 if (buf->buffer == NULL)
586 return -ENOMEM;
587 buf->mapcount = 0;
588 buf->dev = dev;
589 buf->v4lbuf.index = index;
590 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
591 buf->v4lbuf.field = V4L2_FIELD_NONE;
592 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
593 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
594 return 0;
595}
596
597static int stk_free_sio_buffers(struct stk_camera *dev)
598{
599 int i;
600 int nbufs;
601 unsigned long flags;
602 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
603 return 0;
604 /*
605 * If any buffers are mapped, we cannot free them at all.
606 */
607 for (i = 0; i < dev->n_sbufs; i++) {
608 if (dev->sio_bufs[i].mapcount > 0)
609 return -EBUSY;
610 }
611 /*
612 * OK, let's do it.
613 */
614 spin_lock_irqsave(&dev->spinlock, flags);
615 INIT_LIST_HEAD(&dev->sio_avail);
616 INIT_LIST_HEAD(&dev->sio_full);
617 nbufs = dev->n_sbufs;
618 dev->n_sbufs = 0;
619 spin_unlock_irqrestore(&dev->spinlock, flags);
620 for (i = 0; i < nbufs; i++) {
621 if (dev->sio_bufs[i].buffer != NULL)
622 vfree(dev->sio_bufs[i].buffer);
623 }
624 kfree(dev->sio_bufs);
625 dev->sio_bufs = NULL;
626 return 0;
627}
628
629static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
630{
631 int i;
632 if (dev->sio_bufs != NULL)
633 STK_ERROR("sio_bufs already allocated\n");
634 else {
635 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
636 GFP_KERNEL);
637 if (dev->sio_bufs == NULL)
638 return -ENOMEM;
639 for (i = 0; i < n_sbufs; i++) {
640 if (stk_setup_siobuf(dev, i))
641 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
642 dev->n_sbufs = i+1;
643 }
644 }
645 return 0;
646}
647
648static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
649{
650 int err;
651 err = stk_prepare_iso(dev);
652 if (err) {
653 stk_clean_iso(dev);
654 return err;
655 }
656 err = stk_prepare_sio_buffers(dev, n_sbufs);
657 if (err) {
658 stk_free_sio_buffers(dev);
659 return err;
660 }
661 return 0;
662}
663
664static void stk_free_buffers(struct stk_camera *dev)
665{
666 stk_clean_iso(dev);
667 stk_free_sio_buffers(dev);
668}
669/* -------------------------------------------- */
670
671/* v4l file operations */
672
673static int v4l_stk_open(struct inode *inode, struct file *fp)
674{
675 struct stk_camera *dev;
676 struct video_device *vdev;
677
678 vdev = video_devdata(fp);
679 dev = vdev_to_camera(vdev);
680
681 if (dev == NULL || !is_present(dev))
682 return -ENXIO;
683 fp->private_data = vdev;
684 kref_get(&dev->kref);
685
686 return 0;
687}
688
689static int v4l_stk_release(struct inode *inode, struct file *fp)
690{
691 struct stk_camera *dev;
692 struct video_device *vdev;
693
694 vdev = video_devdata(fp);
695 if (vdev == NULL) {
696 STK_ERROR("v4l_release called w/o video devdata\n");
697 return -EFAULT;
698 }
699 dev = vdev_to_camera(vdev);
700 if (dev == NULL) {
701 STK_ERROR("v4l_release called on removed device\n");
702 return -ENODEV;
703 }
704
705 if (dev->owner != fp) {
706 kref_put(&dev->kref, stk_camera_cleanup);
707 return 0;
708 }
709
710 stk_stop_stream(dev);
711
712 stk_free_buffers(dev);
713
714 dev->owner = NULL;
715
716 kref_put(&dev->kref, stk_camera_cleanup);
717
718 return 0;
719}
720
721static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
722 size_t count, loff_t *f_pos)
723{
724 int i;
725 int ret;
726 unsigned long flags;
727 struct stk_camera *dev;
728 struct video_device *vdev;
729 struct stk_sio_buffer *sbuf;
730
731 vdev = video_devdata(fp);
732 if (vdev == NULL)
733 return -EFAULT;
734 dev = vdev_to_camera(vdev);
735
736 if (dev == NULL)
737 return -EIO;
738
739 if (!is_present(dev))
740 return -EIO;
741 if (dev->owner && dev->owner != fp)
742 return -EBUSY;
743 dev->owner = fp;
744 if (!is_streaming(dev)) {
745 if (stk_initialise(dev)
746 || stk_allocate_buffers(dev, 3)
747 || stk_start_stream(dev))
748 return -ENOMEM;
749 spin_lock_irqsave(&dev->spinlock, flags);
750 for (i = 0; i < dev->n_sbufs; i++) {
751 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
752 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
753 }
754 spin_unlock_irqrestore(&dev->spinlock, flags);
755 }
756 if (*f_pos == 0) {
757 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
758 return -EWOULDBLOCK;
759 ret = wait_event_interruptible(dev->wait_frame,
760 !list_empty(&dev->sio_full) || !is_present(dev));
761 if (ret)
762 return ret;
763 if (!is_present(dev))
764 return -EIO;
765 }
766 if (count + *f_pos > dev->frame_size)
767 count = dev->frame_size - *f_pos;
768 spin_lock_irqsave(&dev->spinlock, flags);
769 if (list_empty(&dev->sio_full)) {
770 spin_unlock_irqrestore(&dev->spinlock, flags);
771 STK_ERROR("BUG: No siobufs ready\n");
772 return 0;
773 }
774 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
775 spin_unlock_irqrestore(&dev->spinlock, flags);
776
777 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
778 return -EFAULT;
779
780 *f_pos += count;
781
782 if (*f_pos >= dev->frame_size) {
783 *f_pos = 0;
784 spin_lock_irqsave(&dev->spinlock, flags);
785 list_move_tail(&sbuf->list, &dev->sio_avail);
786 spin_unlock_irqrestore(&dev->spinlock, flags);
787 }
788 return count;
789}
790
791static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
792{
793 struct stk_camera *dev;
794 struct video_device *vdev;
795
796 vdev = video_devdata(fp);
797
798 if (vdev == NULL)
799 return -EFAULT;
800
801 dev = vdev_to_camera(vdev);
802 if (dev == NULL)
803 return -ENODEV;
804
805 poll_wait(fp, &dev->wait_frame, wait);
806
807 if (!is_present(dev))
808 return POLLERR;
809
810 if (!list_empty(&dev->sio_full))
811 return (POLLIN | POLLRDNORM);
812
813 return 0;
814}
815
816
817static void stk_v4l_vm_open(struct vm_area_struct *vma)
818{
819 struct stk_sio_buffer *sbuf = vma->vm_private_data;
820 sbuf->mapcount++;
821}
822static void stk_v4l_vm_close(struct vm_area_struct *vma)
823{
824 struct stk_sio_buffer *sbuf = vma->vm_private_data;
825 sbuf->mapcount--;
826 if (sbuf->mapcount == 0)
827 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
828}
829static struct vm_operations_struct stk_v4l_vm_ops = {
830 .open = stk_v4l_vm_open,
831 .close = stk_v4l_vm_close
832};
833
834static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
835{
836 unsigned int i;
837 int ret;
838 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
839 struct stk_camera *dev;
840 struct video_device *vdev;
841 struct stk_sio_buffer *sbuf = NULL;
842
843 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
844 return -EINVAL;
845
846 vdev = video_devdata(fp);
847 dev = vdev_to_camera(vdev);
848
849 for (i = 0; i < dev->n_sbufs; i++) {
850 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
851 sbuf = dev->sio_bufs + i;
852 break;
853 }
854 }
855 if (sbuf == NULL)
856 return -EINVAL;
857 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
858 if (ret)
859 return ret;
860 vma->vm_flags |= VM_DONTEXPAND;
861 vma->vm_private_data = sbuf;
862 vma->vm_ops = &stk_v4l_vm_ops;
863 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
864 stk_v4l_vm_open(vma);
865 return 0;
866}
867
868/* v4l ioctl handlers */
869
870static int stk_vidioc_querycap(struct file *filp,
871 void *priv, struct v4l2_capability *cap)
872{
873 strcpy(cap->driver, "stk");
874 strcpy(cap->card, "stk");
875 cap->version = DRIVER_VERSION_NUM;
876
877 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
878 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
879 return 0;
880}
881
882static int stk_vidioc_enum_input(struct file *filp,
883 void *priv, struct v4l2_input *input)
884{
885 if (input->index != 0)
886 return -EINVAL;
887
888 strcpy(input->name, "Syntek USB Camera");
889 input->type = V4L2_INPUT_TYPE_CAMERA;
890 return 0;
891}
892
893
894static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
895{
896 *i = 0;
897 return 0;
898}
899
900static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
901{
902 if (i != 0)
903 return -EINVAL;
904 else
905 return 0;
906}
907
908/* from vivi.c */
909static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
910{
911 return 0;
912}
913
914/* List of all V4Lv2 controls supported by the driver */
915static struct v4l2_queryctrl stk_controls[] = {
916 {
917 .id = V4L2_CID_BRIGHTNESS,
918 .type = V4L2_CTRL_TYPE_INTEGER,
919 .name = "Brightness",
920 .minimum = 0,
921 .maximum = 0xffff,
922 .step = 0x0100,
923 .default_value = 0x6000,
924 },
925 /*TODO: get more controls to work */
926};
927
928static int stk_vidioc_queryctrl(struct file *filp,
929 void *priv, struct v4l2_queryctrl *c)
930{
931 int i;
932 int nbr;
933 nbr = ARRAY_SIZE(stk_controls);
934
935 for (i = 0; i < nbr; i++) {
936 if (stk_controls[i].id == c->id) {
937 memcpy(c, &stk_controls[i],
938 sizeof(struct v4l2_queryctrl));
939 return 0;
940 }
941 }
942 return -EINVAL;
943}
944
945static int stk_vidioc_g_ctrl(struct file *filp,
946 void *priv, struct v4l2_control *c)
947{
948 struct stk_camera *dev = priv;
949 switch (c->id) {
950 case V4L2_CID_BRIGHTNESS:
951 c->value = dev->vsettings.brightness;
952 break;
953 default:
954 return -EINVAL;
955 }
956 return 0;
957}
958
959static int stk_vidioc_s_ctrl(struct file *filp,
960 void *priv, struct v4l2_control *c)
961{
962 struct stk_camera *dev = priv;
963 switch (c->id) {
964 case V4L2_CID_BRIGHTNESS:
965 dev->vsettings.brightness = c->value;
966 return stk_sensor_set_brightness(dev, c->value >> 8);
967 default:
968 return -EINVAL;
969 }
970 return 0;
971}
972
973
974static int stk_vidioc_enum_fmt_cap(struct file *filp,
975 void *priv, struct v4l2_fmtdesc *fmtd)
976{
977 fmtd->flags = 0;
978
979 switch (fmtd->index) {
980 case 0:
981 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
982 strcpy(fmtd->description, "r5g6b5");
983 break;
984 case 1:
985 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
986 strcpy(fmtd->description, "r5g6b5BE");
987 break;
988 case 2:
989 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
990 strcpy(fmtd->description, "yuv4:2:2");
991 break;
992 case 3:
993 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
994 strcpy(fmtd->description, "Raw bayer");
995 break;
996 default:
997 return -EINVAL;
998 }
999 return 0;
1000}
1001
1002static struct stk_size {
1003 unsigned w;
1004 unsigned h;
1005 enum stk_mode m;
1006} stk_sizes[] = {
1007 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
1008 { .w = 640, .h = 480, .m = MODE_VGA, },
1009 { .w = 352, .h = 288, .m = MODE_CIF, },
1010 { .w = 320, .h = 240, .m = MODE_QVGA, },
1011 { .w = 176, .h = 144, .m = MODE_QCIF, },
1012};
1013
1014static int stk_vidioc_g_fmt_cap(struct file *filp,
1015 void *priv, struct v4l2_format *f)
1016{
1017 struct v4l2_pix_format *pix_format = &f->fmt.pix;
1018 struct stk_camera *dev = priv;
1019 int i;
1020
1021 for (i = 0; i < ARRAY_SIZE(stk_sizes)
1022 && stk_sizes[i].m != dev->vsettings.mode;
1023 i++);
1024 if (i == ARRAY_SIZE(stk_sizes)) {
1025 STK_ERROR("ERROR: mode invalid\n");
1026 return -EINVAL;
1027 }
1028 pix_format->width = stk_sizes[i].w;
1029 pix_format->height = stk_sizes[i].h;
1030 pix_format->field = V4L2_FIELD_NONE;
1031 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
1032 pix_format->priv = 0;
1033 pix_format->pixelformat = dev->vsettings.palette;
1034 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1035 pix_format->bytesperline = pix_format->width;
1036 else
1037 pix_format->bytesperline = 2 * pix_format->width;
1038 pix_format->sizeimage = pix_format->bytesperline
1039 * pix_format->height;
1040 return 0;
1041}
1042
1043static int stk_vidioc_try_fmt_cap(struct file *filp,
1044 void *priv, struct v4l2_format *fmtd)
1045{
1046 int i;
1047 switch (fmtd->fmt.pix.pixelformat) {
1048 case V4L2_PIX_FMT_RGB565:
1049 case V4L2_PIX_FMT_RGB565X:
1050 case V4L2_PIX_FMT_UYVY:
1051 case V4L2_PIX_FMT_SBGGR8:
1052 break;
1053 default:
1054 return -EINVAL;
1055 }
1056 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1057 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1058 break;
1059 }
1060 if (i == ARRAY_SIZE(stk_sizes)
1061 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1062 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1063 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1064 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1065 fmtd->fmt.pix.priv = i - 1;
1066 } else {
1067 fmtd->fmt.pix.height = stk_sizes[i].h;
1068 fmtd->fmt.pix.width = stk_sizes[i].w;
1069 fmtd->fmt.pix.priv = i;
1070 }
1071
1072 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1073 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1074 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1075 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1076 else
1077 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1078 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1079 * fmtd->fmt.pix.height;
1080 return 0;
1081}
1082
1083static int stk_vidioc_s_fmt_cap(struct file *filp,
1084 void *priv, struct v4l2_format *fmtd)
1085{
1086 int ret;
1087 struct stk_camera *dev = priv;
1088
1089 if (dev == NULL)
1090 return -ENODEV;
1091 if (!is_present(dev))
1092 return -ENODEV;
1093 if (is_streaming(dev))
1094 return -EBUSY;
1095 if (dev->owner && dev->owner != filp)
1096 return -EBUSY;
1097 dev->owner = filp;
1098 ret = stk_vidioc_try_fmt_cap(filp, priv, fmtd);
1099 if (ret)
1100 return ret;
1101
1102 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1103 stk_free_buffers(dev);
1104 dev->frame_size = fmtd->fmt.pix.sizeimage;
1105 dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1106
1107 stk_initialise(dev);
1108 /* This registers controls some timings, not sure of what. */
1109 stk_camera_write_reg(dev, 0x001b, 0x0e);
1110 if (dev->vsettings.mode == MODE_SXGA)
1111 stk_camera_write_reg(dev, 0x001c, 0x0e);
1112 else
1113 stk_camera_write_reg(dev, 0x001c, 0x46);
1114 /*
1115 * Registers 0x0115 0x0114 are the size of each line (bytes),
1116 * regs 0x0117 0x0116 are the heigth of the image.
1117 */
1118 stk_camera_write_reg(dev, 0x0115,
1119 (fmtd->fmt.pix.bytesperline >> 8) & 0xff);
1120 stk_camera_write_reg(dev, 0x0114,
1121 fmtd->fmt.pix.bytesperline & 0xff);
1122 stk_camera_write_reg(dev, 0x0117,
1123 (fmtd->fmt.pix.height >> 8) & 0xff);
1124 stk_camera_write_reg(dev, 0x0116,
1125 fmtd->fmt.pix.height & 0xff);
1126 return stk_sensor_configure(dev);
1127}
1128
1129static int stk_vidioc_reqbufs(struct file *filp,
1130 void *priv, struct v4l2_requestbuffers *rb)
1131{
1132 struct stk_camera *dev = priv;
1133
1134 if (dev == NULL)
1135 return -ENODEV;
1136 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1137 return -EINVAL;
1138 if (rb->memory != V4L2_MEMORY_MMAP)
1139 return -EINVAL;
1140 if (is_streaming(dev)
1141 || (dev->owner && dev->owner != filp))
1142 return -EBUSY;
1143 dev->owner = filp;
1144
1145 /*FIXME If they ask for zero, we must stop streaming and free */
1146 if (rb->count < 3)
1147 rb->count = 3;
1148 /* Arbitrary limit */
1149 else if (rb->count > 5)
1150 rb->count = 5;
1151
1152 stk_allocate_buffers(dev, rb->count);
1153 rb->count = dev->n_sbufs;
1154 return 0;
1155}
1156
1157static int stk_vidioc_querybuf(struct file *filp,
1158 void *priv, struct v4l2_buffer *buf)
1159{
1160 int index;
1161 struct stk_camera *dev = priv;
1162 struct stk_sio_buffer *sbuf;
1163
1164 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1165 return -EINVAL;
1166
1167 index = buf->index;
1168
1169 if (index < 0 || index >= dev->n_sbufs)
1170 return -EINVAL;
1171 sbuf = dev->sio_bufs + buf->index;
1172 *buf = sbuf->v4lbuf;
1173 return 0;
1174}
1175
1176static int stk_vidioc_qbuf(struct file *filp,
1177 void *priv, struct v4l2_buffer *buf)
1178{
1179 struct stk_camera *dev = priv;
1180 struct stk_sio_buffer *sbuf;
1181 unsigned long flags;
1182 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1183 return -EINVAL;
1184
1185 if (buf->memory != V4L2_MEMORY_MMAP)
1186 return -EINVAL;
1187
1188 if (buf->index < 0 || buf->index >= dev->n_sbufs)
1189 return -EINVAL;
1190 sbuf = dev->sio_bufs + buf->index;
1191 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1192 return 0;
1193 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1194 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1195 spin_lock_irqsave(&dev->spinlock, flags);
1196 list_add_tail(&sbuf->list, &dev->sio_avail);
1197 *buf = sbuf->v4lbuf;
1198 spin_unlock_irqrestore(&dev->spinlock, flags);
1199 return 0;
1200}
1201
1202static int stk_vidioc_dqbuf(struct file *filp,
1203 void *priv, struct v4l2_buffer *buf)
1204{
1205 struct stk_camera *dev = priv;
1206 struct stk_sio_buffer *sbuf;
1207 unsigned long flags;
1208 int ret;
1209
1210 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1211 || !is_streaming(dev))
1212 return -EINVAL;
1213
1214 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1215 return -EWOULDBLOCK;
1216 ret = wait_event_interruptible(dev->wait_frame,
1217 !list_empty(&dev->sio_full) || !is_present(dev));
1218 if (ret)
1219 return ret;
1220 if (!is_present(dev))
1221 return -EIO;
1222
1223 spin_lock_irqsave(&dev->spinlock, flags);
1224 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1225 list_del_init(&sbuf->list);
1226 spin_unlock_irqrestore(&dev->spinlock, flags);
1227 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1228 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1229 sbuf->v4lbuf.sequence = ++dev->sequence;
1230 do_gettimeofday(&sbuf->v4lbuf.timestamp);
1231
1232 *buf = sbuf->v4lbuf;
1233 return 0;
1234}
1235
1236static int stk_vidioc_streamon(struct file *filp,
1237 void *priv, enum v4l2_buf_type type)
1238{
1239 struct stk_camera *dev = priv;
1240 if (is_streaming(dev))
1241 return 0;
1242 if (dev->sio_bufs == NULL)
1243 return -EINVAL;
1244 dev->sequence = 0;
1245 return stk_start_stream(dev);
1246}
1247
1248static int stk_vidioc_streamoff(struct file *filp,
1249 void *priv, enum v4l2_buf_type type)
1250{
1251 struct stk_camera *dev = priv;
1252 unsigned long flags;
1253 int i;
1254 stk_stop_stream(dev);
1255 spin_lock_irqsave(&dev->spinlock, flags);
1256 INIT_LIST_HEAD(&dev->sio_avail);
1257 INIT_LIST_HEAD(&dev->sio_full);
1258 for (i = 0; i < dev->n_sbufs; i++) {
1259 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1260 dev->sio_bufs[i].v4lbuf.flags = 0;
1261 }
1262 spin_unlock_irqrestore(&dev->spinlock, flags);
1263 return 0;
1264}
1265
1266
1267static int stk_vidioc_g_parm(struct file *filp,
1268 void *priv, struct v4l2_streamparm *sp)
1269{
1270 if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1271 return -EINVAL;
1272
1273 sp->parm.capture.capability = 0;
1274 sp->parm.capture.capturemode = 0;
1275 /*FIXME This is not correct */
1276 sp->parm.capture.timeperframe.numerator = 1;
1277 sp->parm.capture.timeperframe.denominator = 30;
1278 sp->parm.capture.readbuffers = 2;
1279 sp->parm.capture.extendedmode = 0;
1280 return 0;
1281}
1282
1283static struct file_operations v4l_stk_fops = {
1284 .owner = THIS_MODULE,
1285 .open = v4l_stk_open,
1286 .release = v4l_stk_release,
1287 .read = v4l_stk_read,
1288 .poll = v4l_stk_poll,
1289 .mmap = v4l_stk_mmap,
1290 .ioctl = video_ioctl2,
1291 .llseek = no_llseek
1292};
1293
1294static void stk_v4l_dev_release(struct video_device *vd)
1295{
1296}
1297
1298static struct video_device stk_v4l_data = {
1299 .name = "stkwebcam",
1300 .type = VFL_TYPE_GRABBER,
1301 .type2 = VID_TYPE_CAPTURE,
1302 .minor = -1,
1303 .tvnorms = V4L2_STD_UNKNOWN,
1304 .current_norm = V4L2_STD_UNKNOWN,
1305 .fops = &v4l_stk_fops,
1306 .release = stk_v4l_dev_release,
1307
1308 .vidioc_querycap = stk_vidioc_querycap,
1309 .vidioc_enum_fmt_cap = stk_vidioc_enum_fmt_cap,
1310 .vidioc_try_fmt_cap = stk_vidioc_try_fmt_cap,
1311 .vidioc_s_fmt_cap = stk_vidioc_s_fmt_cap,
1312 .vidioc_g_fmt_cap = stk_vidioc_g_fmt_cap,
1313 .vidioc_enum_input = stk_vidioc_enum_input,
1314 .vidioc_s_input = stk_vidioc_s_input,
1315 .vidioc_g_input = stk_vidioc_g_input,
1316 .vidioc_s_std = stk_vidioc_s_std,
1317 .vidioc_reqbufs = stk_vidioc_reqbufs,
1318 .vidioc_querybuf = stk_vidioc_querybuf,
1319 .vidioc_qbuf = stk_vidioc_qbuf,
1320 .vidioc_dqbuf = stk_vidioc_dqbuf,
1321 .vidioc_streamon = stk_vidioc_streamon,
1322 .vidioc_streamoff = stk_vidioc_streamoff,
1323 .vidioc_queryctrl = stk_vidioc_queryctrl,
1324 .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1325 .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1326 .vidioc_g_parm = stk_vidioc_g_parm,
1327};
1328
1329
1330static int stk_register_video_device(struct stk_camera *dev)
1331{
1332 int err;
1333
1334 dev->vdev = stk_v4l_data;
1335 dev->vdev.debug = debug;
1336 dev->vdev.dev = &dev->interface->dev;
1337 dev->vdev.priv = dev;
1338 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1339 if (err)
1340 STK_ERROR("v4l registration failed\n");
1341 else
1342 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1343 " /dev/video%d\n", dev->vdev.minor);
1344 return err;
1345}
1346
1347
1348/* USB Stuff */
1349
1350static int stk_camera_probe(struct usb_interface *interface,
1351 const struct usb_device_id *id)
1352{
1353 int i;
1354 int err;
1355
1356 struct stk_camera *dev = NULL;
1357 struct usb_device *udev = interface_to_usbdev(interface);
1358 struct usb_host_interface *iface_desc;
1359 struct usb_endpoint_descriptor *endpoint;
1360
1361 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1362 if (dev == NULL) {
1363 STK_ERROR("Out of memory !\n");
1364 return -ENOMEM;
1365 }
1366
1367 kref_init(&dev->kref);
1368 spin_lock_init(&dev->spinlock);
1369 init_waitqueue_head(&dev->wait_frame);
1370
1371 dev->udev = udev;
1372 dev->interface = interface;
1373 usb_get_intf(interface);
1374
1375 dev->vsettings.vflip = vflip;
1376 dev->vsettings.hflip = hflip;
1377 dev->n_sbufs = 0;
1378 set_present(dev);
1379
1380 /* Set up the endpoint information
1381 * use only the first isoc-in endpoint
1382 * for the current alternate setting */
1383 iface_desc = interface->cur_altsetting;
1384
1385 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1386 endpoint = &iface_desc->endpoint[i].desc;
1387
1388 if (!dev->isoc_ep
1389 && ((endpoint->bEndpointAddress
1390 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1391 && ((endpoint->bmAttributes
1392 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1393 /* we found an isoc in endpoint */
1394 dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1395 break;
1396 }
1397 }
1398 if (!dev->isoc_ep) {
1399 STK_ERROR("Could not find isoc-in endpoint");
1400 kref_put(&dev->kref, stk_camera_cleanup);
1401 return -ENODEV;
1402 }
1403 dev->vsettings.brightness = 0x7fff;
1404 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1405 dev->vsettings.mode = MODE_VGA;
1406 dev->frame_size = 640*480*2;
1407
1408 INIT_LIST_HEAD(&dev->sio_avail);
1409 INIT_LIST_HEAD(&dev->sio_full);
1410
1411 usb_set_intfdata(interface, dev);
1412
1413 err = stk_register_video_device(dev);
1414 if (err) {
1415 kref_put(&dev->kref, stk_camera_cleanup);
1416 return err;
1417 }
1418
1419 stk_create_sysfs_files(&dev->vdev);
1420
1421 return 0;
1422}
1423
1424static void stk_camera_disconnect(struct usb_interface *interface)
1425{
1426 struct stk_camera *dev = usb_get_intfdata(interface);
1427
1428 usb_set_intfdata(interface, NULL);
1429 unset_present(dev);
1430
1431 wake_up_interruptible(&dev->wait_frame);
1432 stk_remove_sysfs_files(&dev->vdev);
1433
1434 kref_put(&dev->kref, stk_camera_cleanup);
1435}
1436
1437static struct usb_driver stk_camera_driver = {
1438 .name = "stkwebcam",
1439 .probe = stk_camera_probe,
1440 .disconnect = stk_camera_disconnect,
1441 .id_table = stkwebcam_table,
1442};
1443
1444
1445static int __init stk_camera_init(void)
1446{
1447 int result;
1448
1449 result = usb_register(&stk_camera_driver);
1450 if (result)
1451 STK_ERROR("usb_register failed ! Error number %d\n", result);
1452
1453
1454 return result;
1455}
1456
1457static void __exit stk_camera_exit(void)
1458{
1459 usb_deregister(&stk_camera_driver);
1460}
1461
1462module_init(stk_camera_init);
1463module_exit(stk_camera_exit);
1464
1465
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 10:52:26 -0500