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Merge remote-tracking branch 'keys/keys-next'
[deliverable/linux.git] / drivers / media / usb / stkwebcam / 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/dmi.h>
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 #include <media/v4l2-event.h>
39
40 #include "stk-webcam.h"
41
42
43 static int hflip = -1;
44 module_param(hflip, int, 0444);
45 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
46
47 static int vflip = -1;
48 module_param(vflip, int, 0444);
49 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
50
51 static int debug;
52 module_param(debug, int, 0444);
53 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
54
55 MODULE_LICENSE("GPL");
56 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
57 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
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 * The stk webcam laptop module is mounted upside down in some laptops :(
69 *
70 * Some background information (thanks to Hans de Goede for providing this):
71 *
72 * 1) Once upon a time the stkwebcam driver was written
73 *
74 * 2) The webcam in question was used mostly in Asus laptop models, including
75 * the laptop of the original author of the driver, and in these models, in
76 * typical Asus fashion (see the long long list for uvc cams inside v4l-utils),
77 * they mounted the webcam-module the wrong way up. So the hflip and vflip
78 * module options were given a default value of 1 (the correct value for
79 * upside down mounted models)
80 *
81 * 3) Years later I got a bug report from a user with a laptop with stkwebcam,
82 * where the module was actually mounted the right way up, and thus showed
83 * upside down under Linux. So now I was facing the choice of 2 options:
84 *
85 * a) Add a not-upside-down list to stkwebcam, which overrules the default.
86 *
87 * b) Do it like all the other drivers do, and make the default right for
88 * cams mounted the proper way and add an upside-down model list, with
89 * models where we need to flip-by-default.
90 *
91 * Despite knowing that going b) would cause a period of pain where we were
92 * building the table I opted to go for option b), since a) is just too ugly,
93 * and worse different from how every other driver does it leading to
94 * confusion in the long run. This change was made in kernel 3.6.
95 *
96 * So for any user report about upside-down images since kernel 3.6 ask them
97 * to provide the output of 'sudo dmidecode' so the laptop can be added in
98 * the table below.
99 */
100 static const struct dmi_system_id stk_upside_down_dmi_table[] = {
101 {
102 .ident = "ASUS G1",
103 .matches = {
104 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
105 DMI_MATCH(DMI_PRODUCT_NAME, "G1")
106 }
107 }, {
108 .ident = "ASUS F3JC",
109 .matches = {
110 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
111 DMI_MATCH(DMI_PRODUCT_NAME, "F3JC")
112 }
113 },
114 {
115 .ident = "T12Rg-H",
116 .matches = {
117 DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"),
118 DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H")
119 }
120 },
121 {}
122 };
123
124
125 /*
126 * Basic stuff
127 */
128 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
129 {
130 struct usb_device *udev = dev->udev;
131 int ret;
132
133 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
134 0x01,
135 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
136 value,
137 index,
138 NULL,
139 0,
140 500);
141 if (ret < 0)
142 return ret;
143 else
144 return 0;
145 }
146
147 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
148 {
149 struct usb_device *udev = dev->udev;
150 int ret;
151
152 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
153 0x00,
154 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
155 0x00,
156 index,
157 (u8 *) value,
158 sizeof(u8),
159 500);
160 if (ret < 0)
161 return ret;
162 else
163 return 0;
164 }
165
166 static int stk_start_stream(struct stk_camera *dev)
167 {
168 int value;
169 int i, ret;
170 int value_116, value_117;
171
172 if (!is_present(dev))
173 return -ENODEV;
174 if (!is_memallocd(dev) || !is_initialised(dev)) {
175 STK_ERROR("FIXME: Buffers are not allocated\n");
176 return -EFAULT;
177 }
178 ret = usb_set_interface(dev->udev, 0, 5);
179
180 if (ret < 0)
181 STK_ERROR("usb_set_interface failed !\n");
182 if (stk_sensor_wakeup(dev))
183 STK_ERROR("error awaking the sensor\n");
184
185 stk_camera_read_reg(dev, 0x0116, &value_116);
186 stk_camera_read_reg(dev, 0x0117, &value_117);
187
188 stk_camera_write_reg(dev, 0x0116, 0x0000);
189 stk_camera_write_reg(dev, 0x0117, 0x0000);
190
191 stk_camera_read_reg(dev, 0x0100, &value);
192 stk_camera_write_reg(dev, 0x0100, value | 0x80);
193
194 stk_camera_write_reg(dev, 0x0116, value_116);
195 stk_camera_write_reg(dev, 0x0117, value_117);
196 for (i = 0; i < MAX_ISO_BUFS; i++) {
197 if (dev->isobufs[i].urb) {
198 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
199 atomic_inc(&dev->urbs_used);
200 if (ret)
201 return ret;
202 }
203 }
204 set_streaming(dev);
205 return 0;
206 }
207
208 static int stk_stop_stream(struct stk_camera *dev)
209 {
210 int value;
211 int i;
212 if (is_present(dev)) {
213 stk_camera_read_reg(dev, 0x0100, &value);
214 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
215 if (dev->isobufs != NULL) {
216 for (i = 0; i < MAX_ISO_BUFS; i++) {
217 if (dev->isobufs[i].urb)
218 usb_kill_urb(dev->isobufs[i].urb);
219 }
220 }
221 unset_streaming(dev);
222
223 if (usb_set_interface(dev->udev, 0, 0))
224 STK_ERROR("usb_set_interface failed !\n");
225 if (stk_sensor_sleep(dev))
226 STK_ERROR("error suspending the sensor\n");
227 }
228 return 0;
229 }
230
231 /*
232 * This seems to be the shortest init sequence we
233 * must do in order to find the sensor
234 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
235 * is also reset. Maybe powers down it?
236 * Rest of values don't make a difference
237 */
238
239 static struct regval stk1125_initvals[] = {
240 /*TODO: What means this sequence? */
241 {0x0000, 0x24},
242 {0x0100, 0x21},
243 {0x0002, 0x68},
244 {0x0003, 0x80},
245 {0x0005, 0x00},
246 {0x0007, 0x03},
247 {0x000d, 0x00},
248 {0x000f, 0x02},
249 {0x0300, 0x12},
250 {0x0350, 0x41},
251 {0x0351, 0x00},
252 {0x0352, 0x00},
253 {0x0353, 0x00},
254 {0x0018, 0x10},
255 {0x0019, 0x00},
256 {0x001b, 0x0e},
257 {0x001c, 0x46},
258 {0x0300, 0x80},
259 {0x001a, 0x04},
260 {0x0110, 0x00},
261 {0x0111, 0x00},
262 {0x0112, 0x00},
263 {0x0113, 0x00},
264
265 {0xffff, 0xff},
266 };
267
268
269 static int stk_initialise(struct stk_camera *dev)
270 {
271 struct regval *rv;
272 int ret;
273 if (!is_present(dev))
274 return -ENODEV;
275 if (is_initialised(dev))
276 return 0;
277 rv = stk1125_initvals;
278 while (rv->reg != 0xffff) {
279 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
280 if (ret)
281 return ret;
282 rv++;
283 }
284 if (stk_sensor_init(dev) == 0) {
285 set_initialised(dev);
286 return 0;
287 } else
288 return -1;
289 }
290
291 /* *********************************************** */
292 /*
293 * This function is called as an URB transfert is complete (Isochronous pipe).
294 * So, the traitement is done in interrupt time, so it has be fast, not crash,
295 * and not stall. Neat.
296 */
297 static void stk_isoc_handler(struct urb *urb)
298 {
299 int i;
300 int ret;
301 int framelen;
302 unsigned long flags;
303
304 unsigned char *fill = NULL;
305 unsigned char *iso_buf = NULL;
306
307 struct stk_camera *dev;
308 struct stk_sio_buffer *fb;
309
310 dev = (struct stk_camera *) urb->context;
311
312 if (dev == NULL) {
313 STK_ERROR("isoc_handler called with NULL device !\n");
314 return;
315 }
316
317 if (urb->status == -ENOENT || urb->status == -ECONNRESET
318 || urb->status == -ESHUTDOWN) {
319 atomic_dec(&dev->urbs_used);
320 return;
321 }
322
323 spin_lock_irqsave(&dev->spinlock, flags);
324
325 if (urb->status != -EINPROGRESS && urb->status != 0) {
326 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
327 goto resubmit;
328 }
329
330 if (list_empty(&dev->sio_avail)) {
331 /*FIXME Stop streaming after a while */
332 (void) (printk_ratelimit() &&
333 STK_ERROR("isoc_handler without available buffer!\n"));
334 goto resubmit;
335 }
336 fb = list_first_entry(&dev->sio_avail,
337 struct stk_sio_buffer, list);
338 fill = fb->buffer + fb->v4lbuf.bytesused;
339
340 for (i = 0; i < urb->number_of_packets; i++) {
341 if (urb->iso_frame_desc[i].status != 0) {
342 if (urb->iso_frame_desc[i].status != -EXDEV)
343 STK_ERROR("Frame %d has error %d\n", i,
344 urb->iso_frame_desc[i].status);
345 continue;
346 }
347 framelen = urb->iso_frame_desc[i].actual_length;
348 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
349
350 if (framelen <= 4)
351 continue; /* no data */
352
353 /*
354 * we found something informational from there
355 * the isoc frames have to type of headers
356 * type1: 00 xx 00 00 or 20 xx 00 00
357 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
358 * xx is a sequencer which has never been seen over 0x3f
359 * imho data written down looks like bayer, i see similarities
360 * after every 640 bytes
361 */
362 if (*iso_buf & 0x80) {
363 framelen -= 8;
364 iso_buf += 8;
365 /* This marks a new frame */
366 if (fb->v4lbuf.bytesused != 0
367 && fb->v4lbuf.bytesused != dev->frame_size) {
368 (void) (printk_ratelimit() &&
369 STK_ERROR("frame %d, "
370 "bytesused=%d, skipping\n",
371 i, fb->v4lbuf.bytesused));
372 fb->v4lbuf.bytesused = 0;
373 fill = fb->buffer;
374 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
375 if (list_is_singular(&dev->sio_avail)) {
376 /* Always reuse the last buffer */
377 fb->v4lbuf.bytesused = 0;
378 fill = fb->buffer;
379 } else {
380 list_move_tail(dev->sio_avail.next,
381 &dev->sio_full);
382 wake_up(&dev->wait_frame);
383 fb = list_first_entry(&dev->sio_avail,
384 struct stk_sio_buffer, list);
385 fb->v4lbuf.bytesused = 0;
386 fill = fb->buffer;
387 }
388 }
389 } else {
390 framelen -= 4;
391 iso_buf += 4;
392 }
393
394 /* Our buffer is full !!! */
395 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
396 (void) (printk_ratelimit() &&
397 STK_ERROR("Frame buffer overflow, lost sync\n"));
398 /*FIXME Do something here? */
399 continue;
400 }
401 spin_unlock_irqrestore(&dev->spinlock, flags);
402 memcpy(fill, iso_buf, framelen);
403 spin_lock_irqsave(&dev->spinlock, flags);
404 fill += framelen;
405
406 /* New size of our buffer */
407 fb->v4lbuf.bytesused += framelen;
408 }
409
410 resubmit:
411 spin_unlock_irqrestore(&dev->spinlock, flags);
412 urb->dev = dev->udev;
413 ret = usb_submit_urb(urb, GFP_ATOMIC);
414 if (ret != 0) {
415 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
416 ret);
417 }
418 }
419
420 /* -------------------------------------------- */
421
422 static int stk_prepare_iso(struct stk_camera *dev)
423 {
424 void *kbuf;
425 int i, j;
426 struct urb *urb;
427 struct usb_device *udev;
428
429 if (dev == NULL)
430 return -ENXIO;
431 udev = dev->udev;
432
433 if (dev->isobufs)
434 STK_ERROR("isobufs already allocated. Bad\n");
435 else
436 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
437 GFP_KERNEL);
438 if (dev->isobufs == NULL) {
439 STK_ERROR("Unable to allocate iso buffers\n");
440 return -ENOMEM;
441 }
442 for (i = 0; i < MAX_ISO_BUFS; i++) {
443 if (dev->isobufs[i].data == NULL) {
444 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
445 if (kbuf == NULL) {
446 STK_ERROR("Failed to allocate iso buffer %d\n",
447 i);
448 goto isobufs_out;
449 }
450 dev->isobufs[i].data = kbuf;
451 } else
452 STK_ERROR("isobuf data already allocated\n");
453 if (dev->isobufs[i].urb == NULL) {
454 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
455 if (urb == NULL)
456 goto isobufs_out;
457 dev->isobufs[i].urb = urb;
458 } else {
459 STK_ERROR("Killing URB\n");
460 usb_kill_urb(dev->isobufs[i].urb);
461 urb = dev->isobufs[i].urb;
462 }
463 urb->interval = 1;
464 urb->dev = udev;
465 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
466 urb->transfer_flags = URB_ISO_ASAP;
467 urb->transfer_buffer = dev->isobufs[i].data;
468 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
469 urb->complete = stk_isoc_handler;
470 urb->context = dev;
471 urb->start_frame = 0;
472 urb->number_of_packets = ISO_FRAMES_PER_DESC;
473
474 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
475 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
476 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
477 }
478 }
479 set_memallocd(dev);
480 return 0;
481
482 isobufs_out:
483 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
484 kfree(dev->isobufs[i].data);
485 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
486 usb_free_urb(dev->isobufs[i].urb);
487 kfree(dev->isobufs);
488 dev->isobufs = NULL;
489 return -ENOMEM;
490 }
491
492 static void stk_clean_iso(struct stk_camera *dev)
493 {
494 int i;
495
496 if (dev == NULL || dev->isobufs == NULL)
497 return;
498
499 for (i = 0; i < MAX_ISO_BUFS; i++) {
500 struct urb *urb;
501
502 urb = dev->isobufs[i].urb;
503 if (urb) {
504 if (atomic_read(&dev->urbs_used) && is_present(dev))
505 usb_kill_urb(urb);
506 usb_free_urb(urb);
507 }
508 kfree(dev->isobufs[i].data);
509 }
510 kfree(dev->isobufs);
511 dev->isobufs = NULL;
512 unset_memallocd(dev);
513 }
514
515 static int stk_setup_siobuf(struct stk_camera *dev, int index)
516 {
517 struct stk_sio_buffer *buf = dev->sio_bufs + index;
518 INIT_LIST_HEAD(&buf->list);
519 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
520 buf->buffer = vmalloc_user(buf->v4lbuf.length);
521 if (buf->buffer == NULL)
522 return -ENOMEM;
523 buf->mapcount = 0;
524 buf->dev = dev;
525 buf->v4lbuf.index = index;
526 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
527 buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
528 buf->v4lbuf.field = V4L2_FIELD_NONE;
529 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
530 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
531 return 0;
532 }
533
534 static int stk_free_sio_buffers(struct stk_camera *dev)
535 {
536 int i;
537 int nbufs;
538 unsigned long flags;
539 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
540 return 0;
541 /*
542 * If any buffers are mapped, we cannot free them at all.
543 */
544 for (i = 0; i < dev->n_sbufs; i++) {
545 if (dev->sio_bufs[i].mapcount > 0)
546 return -EBUSY;
547 }
548 /*
549 * OK, let's do it.
550 */
551 spin_lock_irqsave(&dev->spinlock, flags);
552 INIT_LIST_HEAD(&dev->sio_avail);
553 INIT_LIST_HEAD(&dev->sio_full);
554 nbufs = dev->n_sbufs;
555 dev->n_sbufs = 0;
556 spin_unlock_irqrestore(&dev->spinlock, flags);
557 for (i = 0; i < nbufs; i++)
558 vfree(dev->sio_bufs[i].buffer);
559 kfree(dev->sio_bufs);
560 dev->sio_bufs = NULL;
561 return 0;
562 }
563
564 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
565 {
566 int i;
567 if (dev->sio_bufs != NULL)
568 STK_ERROR("sio_bufs already allocated\n");
569 else {
570 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
571 GFP_KERNEL);
572 if (dev->sio_bufs == NULL)
573 return -ENOMEM;
574 for (i = 0; i < n_sbufs; i++) {
575 if (stk_setup_siobuf(dev, i))
576 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
577 dev->n_sbufs = i+1;
578 }
579 }
580 return 0;
581 }
582
583 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
584 {
585 int err;
586 err = stk_prepare_iso(dev);
587 if (err) {
588 stk_clean_iso(dev);
589 return err;
590 }
591 err = stk_prepare_sio_buffers(dev, n_sbufs);
592 if (err) {
593 stk_free_sio_buffers(dev);
594 return err;
595 }
596 return 0;
597 }
598
599 static void stk_free_buffers(struct stk_camera *dev)
600 {
601 stk_clean_iso(dev);
602 stk_free_sio_buffers(dev);
603 }
604 /* -------------------------------------------- */
605
606 /* v4l file operations */
607
608 static int v4l_stk_open(struct file *fp)
609 {
610 struct stk_camera *dev = video_drvdata(fp);
611 int err;
612
613 if (dev == NULL || !is_present(dev))
614 return -ENXIO;
615
616 if (mutex_lock_interruptible(&dev->lock))
617 return -ERESTARTSYS;
618 if (!dev->first_init)
619 stk_camera_write_reg(dev, 0x0, 0x24);
620 else
621 dev->first_init = 0;
622
623 err = v4l2_fh_open(fp);
624 if (!err)
625 usb_autopm_get_interface(dev->interface);
626 mutex_unlock(&dev->lock);
627 return err;
628 }
629
630 static int v4l_stk_release(struct file *fp)
631 {
632 struct stk_camera *dev = video_drvdata(fp);
633
634 mutex_lock(&dev->lock);
635 if (dev->owner == fp) {
636 stk_stop_stream(dev);
637 stk_free_buffers(dev);
638 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
639 unset_initialised(dev);
640 dev->owner = NULL;
641 }
642
643 if (is_present(dev))
644 usb_autopm_put_interface(dev->interface);
645 mutex_unlock(&dev->lock);
646 return v4l2_fh_release(fp);
647 }
648
649 static ssize_t stk_read(struct file *fp, char __user *buf,
650 size_t count, loff_t *f_pos)
651 {
652 int i;
653 int ret;
654 unsigned long flags;
655 struct stk_sio_buffer *sbuf;
656 struct stk_camera *dev = video_drvdata(fp);
657
658 if (!is_present(dev))
659 return -EIO;
660 if (dev->owner && (!dev->reading || dev->owner != fp))
661 return -EBUSY;
662 dev->owner = fp;
663 if (!is_streaming(dev)) {
664 if (stk_initialise(dev)
665 || stk_allocate_buffers(dev, 3)
666 || stk_start_stream(dev))
667 return -ENOMEM;
668 dev->reading = 1;
669 spin_lock_irqsave(&dev->spinlock, flags);
670 for (i = 0; i < dev->n_sbufs; i++) {
671 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
672 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
673 }
674 spin_unlock_irqrestore(&dev->spinlock, flags);
675 }
676 if (*f_pos == 0) {
677 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
678 return -EWOULDBLOCK;
679 ret = wait_event_interruptible(dev->wait_frame,
680 !list_empty(&dev->sio_full) || !is_present(dev));
681 if (ret)
682 return ret;
683 if (!is_present(dev))
684 return -EIO;
685 }
686 if (count + *f_pos > dev->frame_size)
687 count = dev->frame_size - *f_pos;
688 spin_lock_irqsave(&dev->spinlock, flags);
689 if (list_empty(&dev->sio_full)) {
690 spin_unlock_irqrestore(&dev->spinlock, flags);
691 STK_ERROR("BUG: No siobufs ready\n");
692 return 0;
693 }
694 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
695 spin_unlock_irqrestore(&dev->spinlock, flags);
696
697 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
698 return -EFAULT;
699
700 *f_pos += count;
701
702 if (*f_pos >= dev->frame_size) {
703 *f_pos = 0;
704 spin_lock_irqsave(&dev->spinlock, flags);
705 list_move_tail(&sbuf->list, &dev->sio_avail);
706 spin_unlock_irqrestore(&dev->spinlock, flags);
707 }
708 return count;
709 }
710
711 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
712 size_t count, loff_t *f_pos)
713 {
714 struct stk_camera *dev = video_drvdata(fp);
715 int ret;
716
717 if (mutex_lock_interruptible(&dev->lock))
718 return -ERESTARTSYS;
719 ret = stk_read(fp, buf, count, f_pos);
720 mutex_unlock(&dev->lock);
721 return ret;
722 }
723
724 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
725 {
726 struct stk_camera *dev = video_drvdata(fp);
727 unsigned res = v4l2_ctrl_poll(fp, wait);
728
729 poll_wait(fp, &dev->wait_frame, wait);
730
731 if (!is_present(dev))
732 return POLLERR;
733
734 if (!list_empty(&dev->sio_full))
735 return res | POLLIN | POLLRDNORM;
736
737 return res;
738 }
739
740
741 static void stk_v4l_vm_open(struct vm_area_struct *vma)
742 {
743 struct stk_sio_buffer *sbuf = vma->vm_private_data;
744 sbuf->mapcount++;
745 }
746 static void stk_v4l_vm_close(struct vm_area_struct *vma)
747 {
748 struct stk_sio_buffer *sbuf = vma->vm_private_data;
749 sbuf->mapcount--;
750 if (sbuf->mapcount == 0)
751 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
752 }
753 static const struct vm_operations_struct stk_v4l_vm_ops = {
754 .open = stk_v4l_vm_open,
755 .close = stk_v4l_vm_close
756 };
757
758 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
759 {
760 unsigned int i;
761 int ret;
762 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
763 struct stk_camera *dev = video_drvdata(fp);
764 struct stk_sio_buffer *sbuf = NULL;
765
766 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
767 return -EINVAL;
768
769 for (i = 0; i < dev->n_sbufs; i++) {
770 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
771 sbuf = dev->sio_bufs + i;
772 break;
773 }
774 }
775 if (sbuf == NULL)
776 return -EINVAL;
777 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
778 if (ret)
779 return ret;
780 vma->vm_flags |= VM_DONTEXPAND;
781 vma->vm_private_data = sbuf;
782 vma->vm_ops = &stk_v4l_vm_ops;
783 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
784 stk_v4l_vm_open(vma);
785 return 0;
786 }
787
788 /* v4l ioctl handlers */
789
790 static int stk_vidioc_querycap(struct file *filp,
791 void *priv, struct v4l2_capability *cap)
792 {
793 struct stk_camera *dev = video_drvdata(filp);
794
795 strcpy(cap->driver, "stk");
796 strcpy(cap->card, "stk");
797 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
798
799 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
800 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
801 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
802 return 0;
803 }
804
805 static int stk_vidioc_enum_input(struct file *filp,
806 void *priv, struct v4l2_input *input)
807 {
808 if (input->index != 0)
809 return -EINVAL;
810
811 strcpy(input->name, "Syntek USB Camera");
812 input->type = V4L2_INPUT_TYPE_CAMERA;
813 return 0;
814 }
815
816
817 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
818 {
819 *i = 0;
820 return 0;
821 }
822
823 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
824 {
825 return i ? -EINVAL : 0;
826 }
827
828 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
829 {
830 struct stk_camera *dev =
831 container_of(ctrl->handler, struct stk_camera, hdl);
832
833 switch (ctrl->id) {
834 case V4L2_CID_BRIGHTNESS:
835 return stk_sensor_set_brightness(dev, ctrl->val);
836 case V4L2_CID_HFLIP:
837 if (dmi_check_system(stk_upside_down_dmi_table))
838 dev->vsettings.hflip = !ctrl->val;
839 else
840 dev->vsettings.hflip = ctrl->val;
841 return 0;
842 case V4L2_CID_VFLIP:
843 if (dmi_check_system(stk_upside_down_dmi_table))
844 dev->vsettings.vflip = !ctrl->val;
845 else
846 dev->vsettings.vflip = ctrl->val;
847 return 0;
848 default:
849 return -EINVAL;
850 }
851 return 0;
852 }
853
854
855 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
856 void *priv, struct v4l2_fmtdesc *fmtd)
857 {
858 switch (fmtd->index) {
859 case 0:
860 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
861 strcpy(fmtd->description, "r5g6b5");
862 break;
863 case 1:
864 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
865 strcpy(fmtd->description, "r5g6b5BE");
866 break;
867 case 2:
868 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
869 strcpy(fmtd->description, "yuv4:2:2");
870 break;
871 case 3:
872 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
873 strcpy(fmtd->description, "Raw bayer");
874 break;
875 case 4:
876 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
877 strcpy(fmtd->description, "yuv4:2:2");
878 break;
879 default:
880 return -EINVAL;
881 }
882 return 0;
883 }
884
885 static struct stk_size {
886 unsigned w;
887 unsigned h;
888 enum stk_mode m;
889 } stk_sizes[] = {
890 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
891 { .w = 640, .h = 480, .m = MODE_VGA, },
892 { .w = 352, .h = 288, .m = MODE_CIF, },
893 { .w = 320, .h = 240, .m = MODE_QVGA, },
894 { .w = 176, .h = 144, .m = MODE_QCIF, },
895 };
896
897 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
898 void *priv, struct v4l2_format *f)
899 {
900 struct v4l2_pix_format *pix_format = &f->fmt.pix;
901 struct stk_camera *dev = video_drvdata(filp);
902 int i;
903
904 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
905 stk_sizes[i].m != dev->vsettings.mode; i++)
906 ;
907 if (i == ARRAY_SIZE(stk_sizes)) {
908 STK_ERROR("ERROR: mode invalid\n");
909 return -EINVAL;
910 }
911 pix_format->width = stk_sizes[i].w;
912 pix_format->height = stk_sizes[i].h;
913 pix_format->field = V4L2_FIELD_NONE;
914 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
915 pix_format->pixelformat = dev->vsettings.palette;
916 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
917 pix_format->bytesperline = pix_format->width;
918 else
919 pix_format->bytesperline = 2 * pix_format->width;
920 pix_format->sizeimage = pix_format->bytesperline
921 * pix_format->height;
922 return 0;
923 }
924
925 static int stk_try_fmt_vid_cap(struct file *filp,
926 struct v4l2_format *fmtd, int *idx)
927 {
928 int i;
929 switch (fmtd->fmt.pix.pixelformat) {
930 case V4L2_PIX_FMT_RGB565:
931 case V4L2_PIX_FMT_RGB565X:
932 case V4L2_PIX_FMT_UYVY:
933 case V4L2_PIX_FMT_YUYV:
934 case V4L2_PIX_FMT_SBGGR8:
935 break;
936 default:
937 return -EINVAL;
938 }
939 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
940 if (fmtd->fmt.pix.width > stk_sizes[i].w)
941 break;
942 }
943 if (i == ARRAY_SIZE(stk_sizes)
944 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
945 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
946 fmtd->fmt.pix.height = stk_sizes[i-1].h;
947 fmtd->fmt.pix.width = stk_sizes[i-1].w;
948 if (idx)
949 *idx = i - 1;
950 } else {
951 fmtd->fmt.pix.height = stk_sizes[i].h;
952 fmtd->fmt.pix.width = stk_sizes[i].w;
953 if (idx)
954 *idx = i;
955 }
956
957 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
958 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
959 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
960 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
961 else
962 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
963 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
964 * fmtd->fmt.pix.height;
965 return 0;
966 }
967
968 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
969 void *priv, struct v4l2_format *fmtd)
970 {
971 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
972 }
973
974 static int stk_setup_format(struct stk_camera *dev)
975 {
976 int i = 0;
977 int depth;
978 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
979 depth = 1;
980 else
981 depth = 2;
982 while (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("Something is broken in %s\n", __func__);
987 return -EFAULT;
988 }
989 /* This registers controls some timings, not sure of what. */
990 stk_camera_write_reg(dev, 0x001b, 0x0e);
991 if (dev->vsettings.mode == MODE_SXGA)
992 stk_camera_write_reg(dev, 0x001c, 0x0e);
993 else
994 stk_camera_write_reg(dev, 0x001c, 0x46);
995 /*
996 * Registers 0x0115 0x0114 are the size of each line (bytes),
997 * regs 0x0117 0x0116 are the heigth of the image.
998 */
999 stk_camera_write_reg(dev, 0x0115,
1000 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1001 stk_camera_write_reg(dev, 0x0114,
1002 (stk_sizes[i].w * depth) & 0xff);
1003 stk_camera_write_reg(dev, 0x0117,
1004 (stk_sizes[i].h >> 8) & 0xff);
1005 stk_camera_write_reg(dev, 0x0116,
1006 stk_sizes[i].h & 0xff);
1007 return stk_sensor_configure(dev);
1008 }
1009
1010 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1011 void *priv, struct v4l2_format *fmtd)
1012 {
1013 int ret;
1014 int idx;
1015 struct stk_camera *dev = video_drvdata(filp);
1016
1017 if (dev == NULL)
1018 return -ENODEV;
1019 if (!is_present(dev))
1020 return -ENODEV;
1021 if (is_streaming(dev))
1022 return -EBUSY;
1023 if (dev->owner)
1024 return -EBUSY;
1025 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1026 if (ret)
1027 return ret;
1028
1029 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1030 stk_free_buffers(dev);
1031 dev->frame_size = fmtd->fmt.pix.sizeimage;
1032 dev->vsettings.mode = stk_sizes[idx].m;
1033
1034 stk_initialise(dev);
1035 return stk_setup_format(dev);
1036 }
1037
1038 static int stk_vidioc_reqbufs(struct file *filp,
1039 void *priv, struct v4l2_requestbuffers *rb)
1040 {
1041 struct stk_camera *dev = video_drvdata(filp);
1042
1043 if (dev == NULL)
1044 return -ENODEV;
1045 if (rb->memory != V4L2_MEMORY_MMAP)
1046 return -EINVAL;
1047 if (is_streaming(dev)
1048 || (dev->owner && dev->owner != filp))
1049 return -EBUSY;
1050 stk_free_buffers(dev);
1051 if (rb->count == 0) {
1052 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1053 unset_initialised(dev);
1054 dev->owner = NULL;
1055 return 0;
1056 }
1057 dev->owner = filp;
1058
1059 /*FIXME If they ask for zero, we must stop streaming and free */
1060 if (rb->count < 3)
1061 rb->count = 3;
1062 /* Arbitrary limit */
1063 else if (rb->count > 5)
1064 rb->count = 5;
1065
1066 stk_allocate_buffers(dev, rb->count);
1067 rb->count = dev->n_sbufs;
1068 return 0;
1069 }
1070
1071 static int stk_vidioc_querybuf(struct file *filp,
1072 void *priv, struct v4l2_buffer *buf)
1073 {
1074 struct stk_camera *dev = video_drvdata(filp);
1075 struct stk_sio_buffer *sbuf;
1076
1077 if (buf->index >= dev->n_sbufs)
1078 return -EINVAL;
1079 sbuf = dev->sio_bufs + buf->index;
1080 *buf = sbuf->v4lbuf;
1081 return 0;
1082 }
1083
1084 static int stk_vidioc_qbuf(struct file *filp,
1085 void *priv, struct v4l2_buffer *buf)
1086 {
1087 struct stk_camera *dev = video_drvdata(filp);
1088 struct stk_sio_buffer *sbuf;
1089 unsigned long flags;
1090
1091 if (buf->memory != V4L2_MEMORY_MMAP)
1092 return -EINVAL;
1093
1094 if (buf->index >= dev->n_sbufs)
1095 return -EINVAL;
1096 sbuf = dev->sio_bufs + buf->index;
1097 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1098 return 0;
1099 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1100 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1101 spin_lock_irqsave(&dev->spinlock, flags);
1102 list_add_tail(&sbuf->list, &dev->sio_avail);
1103 *buf = sbuf->v4lbuf;
1104 spin_unlock_irqrestore(&dev->spinlock, flags);
1105 return 0;
1106 }
1107
1108 static int stk_vidioc_dqbuf(struct file *filp,
1109 void *priv, struct v4l2_buffer *buf)
1110 {
1111 struct stk_camera *dev = video_drvdata(filp);
1112 struct stk_sio_buffer *sbuf;
1113 unsigned long flags;
1114 int ret;
1115
1116 if (!is_streaming(dev))
1117 return -EINVAL;
1118
1119 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1120 return -EWOULDBLOCK;
1121 ret = wait_event_interruptible(dev->wait_frame,
1122 !list_empty(&dev->sio_full) || !is_present(dev));
1123 if (ret)
1124 return ret;
1125 if (!is_present(dev))
1126 return -EIO;
1127
1128 spin_lock_irqsave(&dev->spinlock, flags);
1129 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1130 list_del_init(&sbuf->list);
1131 spin_unlock_irqrestore(&dev->spinlock, flags);
1132 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1133 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1134 sbuf->v4lbuf.sequence = ++dev->sequence;
1135 v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1136
1137 *buf = sbuf->v4lbuf;
1138 return 0;
1139 }
1140
1141 static int stk_vidioc_streamon(struct file *filp,
1142 void *priv, enum v4l2_buf_type type)
1143 {
1144 struct stk_camera *dev = video_drvdata(filp);
1145 if (is_streaming(dev))
1146 return 0;
1147 if (dev->sio_bufs == NULL)
1148 return -EINVAL;
1149 dev->sequence = 0;
1150 return stk_start_stream(dev);
1151 }
1152
1153 static int stk_vidioc_streamoff(struct file *filp,
1154 void *priv, enum v4l2_buf_type type)
1155 {
1156 struct stk_camera *dev = video_drvdata(filp);
1157 unsigned long flags;
1158 int i;
1159 stk_stop_stream(dev);
1160 spin_lock_irqsave(&dev->spinlock, flags);
1161 INIT_LIST_HEAD(&dev->sio_avail);
1162 INIT_LIST_HEAD(&dev->sio_full);
1163 for (i = 0; i < dev->n_sbufs; i++) {
1164 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1165 dev->sio_bufs[i].v4lbuf.flags = 0;
1166 }
1167 spin_unlock_irqrestore(&dev->spinlock, flags);
1168 return 0;
1169 }
1170
1171
1172 static int stk_vidioc_g_parm(struct file *filp,
1173 void *priv, struct v4l2_streamparm *sp)
1174 {
1175 /*FIXME This is not correct */
1176 sp->parm.capture.timeperframe.numerator = 1;
1177 sp->parm.capture.timeperframe.denominator = 30;
1178 sp->parm.capture.readbuffers = 2;
1179 return 0;
1180 }
1181
1182 static int stk_vidioc_enum_framesizes(struct file *filp,
1183 void *priv, struct v4l2_frmsizeenum *frms)
1184 {
1185 if (frms->index >= ARRAY_SIZE(stk_sizes))
1186 return -EINVAL;
1187 switch (frms->pixel_format) {
1188 case V4L2_PIX_FMT_RGB565:
1189 case V4L2_PIX_FMT_RGB565X:
1190 case V4L2_PIX_FMT_UYVY:
1191 case V4L2_PIX_FMT_YUYV:
1192 case V4L2_PIX_FMT_SBGGR8:
1193 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1194 frms->discrete.width = stk_sizes[frms->index].w;
1195 frms->discrete.height = stk_sizes[frms->index].h;
1196 return 0;
1197 default: return -EINVAL;
1198 }
1199 }
1200
1201 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1202 .s_ctrl = stk_s_ctrl,
1203 };
1204
1205 static struct v4l2_file_operations v4l_stk_fops = {
1206 .owner = THIS_MODULE,
1207 .open = v4l_stk_open,
1208 .release = v4l_stk_release,
1209 .read = v4l_stk_read,
1210 .poll = v4l_stk_poll,
1211 .mmap = v4l_stk_mmap,
1212 .unlocked_ioctl = video_ioctl2,
1213 };
1214
1215 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1216 .vidioc_querycap = stk_vidioc_querycap,
1217 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1218 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1219 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1220 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1221 .vidioc_enum_input = stk_vidioc_enum_input,
1222 .vidioc_s_input = stk_vidioc_s_input,
1223 .vidioc_g_input = stk_vidioc_g_input,
1224 .vidioc_reqbufs = stk_vidioc_reqbufs,
1225 .vidioc_querybuf = stk_vidioc_querybuf,
1226 .vidioc_qbuf = stk_vidioc_qbuf,
1227 .vidioc_dqbuf = stk_vidioc_dqbuf,
1228 .vidioc_streamon = stk_vidioc_streamon,
1229 .vidioc_streamoff = stk_vidioc_streamoff,
1230 .vidioc_g_parm = stk_vidioc_g_parm,
1231 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1232 .vidioc_log_status = v4l2_ctrl_log_status,
1233 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1234 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1235 };
1236
1237 static void stk_v4l_dev_release(struct video_device *vd)
1238 {
1239 struct stk_camera *dev = vdev_to_camera(vd);
1240
1241 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1242 STK_ERROR("We are leaking memory\n");
1243 usb_put_intf(dev->interface);
1244 kfree(dev);
1245 }
1246
1247 static struct video_device stk_v4l_data = {
1248 .name = "stkwebcam",
1249 .fops = &v4l_stk_fops,
1250 .ioctl_ops = &v4l_stk_ioctl_ops,
1251 .release = stk_v4l_dev_release,
1252 };
1253
1254
1255 static int stk_register_video_device(struct stk_camera *dev)
1256 {
1257 int err;
1258
1259 dev->vdev = stk_v4l_data;
1260 dev->vdev.lock = &dev->lock;
1261 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1262 video_set_drvdata(&dev->vdev, dev);
1263 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1264 if (err)
1265 STK_ERROR("v4l registration failed\n");
1266 else
1267 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1268 video_device_node_name(&dev->vdev));
1269 return err;
1270 }
1271
1272
1273 /* USB Stuff */
1274
1275 static int stk_camera_probe(struct usb_interface *interface,
1276 const struct usb_device_id *id)
1277 {
1278 struct v4l2_ctrl_handler *hdl;
1279 int err = 0;
1280 int i;
1281
1282 struct stk_camera *dev = NULL;
1283 struct usb_device *udev = interface_to_usbdev(interface);
1284 struct usb_host_interface *iface_desc;
1285 struct usb_endpoint_descriptor *endpoint;
1286
1287 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1288 if (dev == NULL) {
1289 STK_ERROR("Out of memory !\n");
1290 return -ENOMEM;
1291 }
1292 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1293 if (err < 0) {
1294 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1295 kfree(dev);
1296 return err;
1297 }
1298 hdl = &dev->hdl;
1299 v4l2_ctrl_handler_init(hdl, 3);
1300 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1301 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1302 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1303 V4L2_CID_HFLIP, 0, 1, 1, 1);
1304 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1305 V4L2_CID_VFLIP, 0, 1, 1, 1);
1306 if (hdl->error) {
1307 err = hdl->error;
1308 dev_err(&udev->dev, "couldn't register control\n");
1309 goto error;
1310 }
1311 dev->v4l2_dev.ctrl_handler = hdl;
1312
1313 spin_lock_init(&dev->spinlock);
1314 mutex_init(&dev->lock);
1315 init_waitqueue_head(&dev->wait_frame);
1316 dev->first_init = 1; /* webcam LED management */
1317
1318 dev->udev = udev;
1319 dev->interface = interface;
1320 usb_get_intf(interface);
1321
1322 if (hflip != -1)
1323 dev->vsettings.hflip = hflip;
1324 else if (dmi_check_system(stk_upside_down_dmi_table))
1325 dev->vsettings.hflip = 1;
1326 else
1327 dev->vsettings.hflip = 0;
1328 if (vflip != -1)
1329 dev->vsettings.vflip = vflip;
1330 else if (dmi_check_system(stk_upside_down_dmi_table))
1331 dev->vsettings.vflip = 1;
1332 else
1333 dev->vsettings.vflip = 0;
1334 dev->n_sbufs = 0;
1335 set_present(dev);
1336
1337 /* Set up the endpoint information
1338 * use only the first isoc-in endpoint
1339 * for the current alternate setting */
1340 iface_desc = interface->cur_altsetting;
1341
1342 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1343 endpoint = &iface_desc->endpoint[i].desc;
1344
1345 if (!dev->isoc_ep
1346 && usb_endpoint_is_isoc_in(endpoint)) {
1347 /* we found an isoc in endpoint */
1348 dev->isoc_ep = usb_endpoint_num(endpoint);
1349 break;
1350 }
1351 }
1352 if (!dev->isoc_ep) {
1353 STK_ERROR("Could not find isoc-in endpoint");
1354 err = -ENODEV;
1355 goto error;
1356 }
1357 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1358 dev->vsettings.mode = MODE_VGA;
1359 dev->frame_size = 640 * 480 * 2;
1360
1361 INIT_LIST_HEAD(&dev->sio_avail);
1362 INIT_LIST_HEAD(&dev->sio_full);
1363
1364 usb_set_intfdata(interface, dev);
1365
1366 err = stk_register_video_device(dev);
1367 if (err)
1368 goto error;
1369
1370 return 0;
1371
1372 error:
1373 v4l2_ctrl_handler_free(hdl);
1374 v4l2_device_unregister(&dev->v4l2_dev);
1375 kfree(dev);
1376 return err;
1377 }
1378
1379 static void stk_camera_disconnect(struct usb_interface *interface)
1380 {
1381 struct stk_camera *dev = usb_get_intfdata(interface);
1382
1383 usb_set_intfdata(interface, NULL);
1384 unset_present(dev);
1385
1386 wake_up_interruptible(&dev->wait_frame);
1387
1388 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1389 video_device_node_name(&dev->vdev));
1390
1391 video_unregister_device(&dev->vdev);
1392 v4l2_ctrl_handler_free(&dev->hdl);
1393 v4l2_device_unregister(&dev->v4l2_dev);
1394 }
1395
1396 #ifdef CONFIG_PM
1397 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1398 {
1399 struct stk_camera *dev = usb_get_intfdata(intf);
1400 if (is_streaming(dev)) {
1401 stk_stop_stream(dev);
1402 /* yes, this is ugly */
1403 set_streaming(dev);
1404 }
1405 return 0;
1406 }
1407
1408 static int stk_camera_resume(struct usb_interface *intf)
1409 {
1410 struct stk_camera *dev = usb_get_intfdata(intf);
1411 if (!is_initialised(dev))
1412 return 0;
1413 unset_initialised(dev);
1414 stk_initialise(dev);
1415 stk_camera_write_reg(dev, 0x0, 0x49);
1416 stk_setup_format(dev);
1417 if (is_streaming(dev))
1418 stk_start_stream(dev);
1419 return 0;
1420 }
1421 #endif
1422
1423 static struct usb_driver stk_camera_driver = {
1424 .name = "stkwebcam",
1425 .probe = stk_camera_probe,
1426 .disconnect = stk_camera_disconnect,
1427 .id_table = stkwebcam_table,
1428 #ifdef CONFIG_PM
1429 .suspend = stk_camera_suspend,
1430 .resume = stk_camera_resume,
1431 #endif
1432 };
1433
1434 module_usb_driver(stk_camera_driver);
Linux kernel - Deliverables
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