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Merge remote-tracking branch 'regulator/topic/tps65910' into regulator-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 };
116
117
118 /*
119 * Basic stuff
120 */
121 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
122 {
123 struct usb_device *udev = dev->udev;
124 int ret;
125
126 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
127 0x01,
128 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
129 value,
130 index,
131 NULL,
132 0,
133 500);
134 if (ret < 0)
135 return ret;
136 else
137 return 0;
138 }
139
140 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
141 {
142 struct usb_device *udev = dev->udev;
143 int ret;
144
145 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
146 0x00,
147 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
148 0x00,
149 index,
150 (u8 *) value,
151 sizeof(u8),
152 500);
153 if (ret < 0)
154 return ret;
155 else
156 return 0;
157 }
158
159 static int stk_start_stream(struct stk_camera *dev)
160 {
161 int value;
162 int i, ret;
163 int value_116, value_117;
164
165 if (!is_present(dev))
166 return -ENODEV;
167 if (!is_memallocd(dev) || !is_initialised(dev)) {
168 STK_ERROR("FIXME: Buffers are not allocated\n");
169 return -EFAULT;
170 }
171 ret = usb_set_interface(dev->udev, 0, 5);
172
173 if (ret < 0)
174 STK_ERROR("usb_set_interface failed !\n");
175 if (stk_sensor_wakeup(dev))
176 STK_ERROR("error awaking the sensor\n");
177
178 stk_camera_read_reg(dev, 0x0116, &value_116);
179 stk_camera_read_reg(dev, 0x0117, &value_117);
180
181 stk_camera_write_reg(dev, 0x0116, 0x0000);
182 stk_camera_write_reg(dev, 0x0117, 0x0000);
183
184 stk_camera_read_reg(dev, 0x0100, &value);
185 stk_camera_write_reg(dev, 0x0100, value | 0x80);
186
187 stk_camera_write_reg(dev, 0x0116, value_116);
188 stk_camera_write_reg(dev, 0x0117, value_117);
189 for (i = 0; i < MAX_ISO_BUFS; i++) {
190 if (dev->isobufs[i].urb) {
191 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
192 atomic_inc(&dev->urbs_used);
193 if (ret)
194 return ret;
195 }
196 }
197 set_streaming(dev);
198 return 0;
199 }
200
201 static int stk_stop_stream(struct stk_camera *dev)
202 {
203 int value;
204 int i;
205 if (is_present(dev)) {
206 stk_camera_read_reg(dev, 0x0100, &value);
207 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
208 if (dev->isobufs != NULL) {
209 for (i = 0; i < MAX_ISO_BUFS; i++) {
210 if (dev->isobufs[i].urb)
211 usb_kill_urb(dev->isobufs[i].urb);
212 }
213 }
214 unset_streaming(dev);
215
216 if (usb_set_interface(dev->udev, 0, 0))
217 STK_ERROR("usb_set_interface failed !\n");
218 if (stk_sensor_sleep(dev))
219 STK_ERROR("error suspending the sensor\n");
220 }
221 return 0;
222 }
223
224 /*
225 * This seems to be the shortest init sequence we
226 * must do in order to find the sensor
227 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
228 * is also reset. Maybe powers down it?
229 * Rest of values don't make a difference
230 */
231
232 static struct regval stk1125_initvals[] = {
233 /*TODO: What means this sequence? */
234 {0x0000, 0x24},
235 {0x0100, 0x21},
236 {0x0002, 0x68},
237 {0x0003, 0x80},
238 {0x0005, 0x00},
239 {0x0007, 0x03},
240 {0x000d, 0x00},
241 {0x000f, 0x02},
242 {0x0300, 0x12},
243 {0x0350, 0x41},
244 {0x0351, 0x00},
245 {0x0352, 0x00},
246 {0x0353, 0x00},
247 {0x0018, 0x10},
248 {0x0019, 0x00},
249 {0x001b, 0x0e},
250 {0x001c, 0x46},
251 {0x0300, 0x80},
252 {0x001a, 0x04},
253 {0x0110, 0x00},
254 {0x0111, 0x00},
255 {0x0112, 0x00},
256 {0x0113, 0x00},
257
258 {0xffff, 0xff},
259 };
260
261
262 static int stk_initialise(struct stk_camera *dev)
263 {
264 struct regval *rv;
265 int ret;
266 if (!is_present(dev))
267 return -ENODEV;
268 if (is_initialised(dev))
269 return 0;
270 rv = stk1125_initvals;
271 while (rv->reg != 0xffff) {
272 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
273 if (ret)
274 return ret;
275 rv++;
276 }
277 if (stk_sensor_init(dev) == 0) {
278 set_initialised(dev);
279 return 0;
280 } else
281 return -1;
282 }
283
284 /* *********************************************** */
285 /*
286 * This function is called as an URB transfert is complete (Isochronous pipe).
287 * So, the traitement is done in interrupt time, so it has be fast, not crash,
288 * and not stall. Neat.
289 */
290 static void stk_isoc_handler(struct urb *urb)
291 {
292 int i;
293 int ret;
294 int framelen;
295 unsigned long flags;
296
297 unsigned char *fill = NULL;
298 unsigned char *iso_buf = NULL;
299
300 struct stk_camera *dev;
301 struct stk_sio_buffer *fb;
302
303 dev = (struct stk_camera *) urb->context;
304
305 if (dev == NULL) {
306 STK_ERROR("isoc_handler called with NULL device !\n");
307 return;
308 }
309
310 if (urb->status == -ENOENT || urb->status == -ECONNRESET
311 || urb->status == -ESHUTDOWN) {
312 atomic_dec(&dev->urbs_used);
313 return;
314 }
315
316 spin_lock_irqsave(&dev->spinlock, flags);
317
318 if (urb->status != -EINPROGRESS && urb->status != 0) {
319 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
320 goto resubmit;
321 }
322
323 if (list_empty(&dev->sio_avail)) {
324 /*FIXME Stop streaming after a while */
325 (void) (printk_ratelimit() &&
326 STK_ERROR("isoc_handler without available buffer!\n"));
327 goto resubmit;
328 }
329 fb = list_first_entry(&dev->sio_avail,
330 struct stk_sio_buffer, list);
331 fill = fb->buffer + fb->v4lbuf.bytesused;
332
333 for (i = 0; i < urb->number_of_packets; i++) {
334 if (urb->iso_frame_desc[i].status != 0) {
335 if (urb->iso_frame_desc[i].status != -EXDEV)
336 STK_ERROR("Frame %d has error %d\n", i,
337 urb->iso_frame_desc[i].status);
338 continue;
339 }
340 framelen = urb->iso_frame_desc[i].actual_length;
341 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
342
343 if (framelen <= 4)
344 continue; /* no data */
345
346 /*
347 * we found something informational from there
348 * the isoc frames have to type of headers
349 * type1: 00 xx 00 00 or 20 xx 00 00
350 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
351 * xx is a sequencer which has never been seen over 0x3f
352 * imho data written down looks like bayer, i see similarities
353 * after every 640 bytes
354 */
355 if (*iso_buf & 0x80) {
356 framelen -= 8;
357 iso_buf += 8;
358 /* This marks a new frame */
359 if (fb->v4lbuf.bytesused != 0
360 && fb->v4lbuf.bytesused != dev->frame_size) {
361 (void) (printk_ratelimit() &&
362 STK_ERROR("frame %d, "
363 "bytesused=%d, skipping\n",
364 i, fb->v4lbuf.bytesused));
365 fb->v4lbuf.bytesused = 0;
366 fill = fb->buffer;
367 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
368 if (list_is_singular(&dev->sio_avail)) {
369 /* Always reuse the last buffer */
370 fb->v4lbuf.bytesused = 0;
371 fill = fb->buffer;
372 } else {
373 list_move_tail(dev->sio_avail.next,
374 &dev->sio_full);
375 wake_up(&dev->wait_frame);
376 fb = list_first_entry(&dev->sio_avail,
377 struct stk_sio_buffer, list);
378 fb->v4lbuf.bytesused = 0;
379 fill = fb->buffer;
380 }
381 }
382 } else {
383 framelen -= 4;
384 iso_buf += 4;
385 }
386
387 /* Our buffer is full !!! */
388 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
389 (void) (printk_ratelimit() &&
390 STK_ERROR("Frame buffer overflow, lost sync\n"));
391 /*FIXME Do something here? */
392 continue;
393 }
394 spin_unlock_irqrestore(&dev->spinlock, flags);
395 memcpy(fill, iso_buf, framelen);
396 spin_lock_irqsave(&dev->spinlock, flags);
397 fill += framelen;
398
399 /* New size of our buffer */
400 fb->v4lbuf.bytesused += framelen;
401 }
402
403 resubmit:
404 spin_unlock_irqrestore(&dev->spinlock, flags);
405 urb->dev = dev->udev;
406 ret = usb_submit_urb(urb, GFP_ATOMIC);
407 if (ret != 0) {
408 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
409 ret);
410 }
411 }
412
413 /* -------------------------------------------- */
414
415 static int stk_prepare_iso(struct stk_camera *dev)
416 {
417 void *kbuf;
418 int i, j;
419 struct urb *urb;
420 struct usb_device *udev;
421
422 if (dev == NULL)
423 return -ENXIO;
424 udev = dev->udev;
425
426 if (dev->isobufs)
427 STK_ERROR("isobufs already allocated. Bad\n");
428 else
429 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
430 GFP_KERNEL);
431 if (dev->isobufs == NULL) {
432 STK_ERROR("Unable to allocate iso buffers\n");
433 return -ENOMEM;
434 }
435 for (i = 0; i < MAX_ISO_BUFS; i++) {
436 if (dev->isobufs[i].data == NULL) {
437 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
438 if (kbuf == NULL) {
439 STK_ERROR("Failed to allocate iso buffer %d\n",
440 i);
441 goto isobufs_out;
442 }
443 dev->isobufs[i].data = kbuf;
444 } else
445 STK_ERROR("isobuf data already allocated\n");
446 if (dev->isobufs[i].urb == NULL) {
447 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
448 if (urb == NULL) {
449 STK_ERROR("Failed to allocate URB %d\n", i);
450 goto isobufs_out;
451 }
452 dev->isobufs[i].urb = urb;
453 } else {
454 STK_ERROR("Killing URB\n");
455 usb_kill_urb(dev->isobufs[i].urb);
456 urb = dev->isobufs[i].urb;
457 }
458 urb->interval = 1;
459 urb->dev = udev;
460 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
461 urb->transfer_flags = URB_ISO_ASAP;
462 urb->transfer_buffer = dev->isobufs[i].data;
463 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
464 urb->complete = stk_isoc_handler;
465 urb->context = dev;
466 urb->start_frame = 0;
467 urb->number_of_packets = ISO_FRAMES_PER_DESC;
468
469 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
470 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
471 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
472 }
473 }
474 set_memallocd(dev);
475 return 0;
476
477 isobufs_out:
478 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
479 kfree(dev->isobufs[i].data);
480 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
481 usb_free_urb(dev->isobufs[i].urb);
482 kfree(dev->isobufs);
483 dev->isobufs = NULL;
484 return -ENOMEM;
485 }
486
487 static void stk_clean_iso(struct stk_camera *dev)
488 {
489 int i;
490
491 if (dev == NULL || dev->isobufs == NULL)
492 return;
493
494 for (i = 0; i < MAX_ISO_BUFS; i++) {
495 struct urb *urb;
496
497 urb = dev->isobufs[i].urb;
498 if (urb) {
499 if (atomic_read(&dev->urbs_used) && is_present(dev))
500 usb_kill_urb(urb);
501 usb_free_urb(urb);
502 }
503 kfree(dev->isobufs[i].data);
504 }
505 kfree(dev->isobufs);
506 dev->isobufs = NULL;
507 unset_memallocd(dev);
508 }
509
510 static int stk_setup_siobuf(struct stk_camera *dev, int index)
511 {
512 struct stk_sio_buffer *buf = dev->sio_bufs + index;
513 INIT_LIST_HEAD(&buf->list);
514 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
515 buf->buffer = vmalloc_user(buf->v4lbuf.length);
516 if (buf->buffer == NULL)
517 return -ENOMEM;
518 buf->mapcount = 0;
519 buf->dev = dev;
520 buf->v4lbuf.index = index;
521 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
522 buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
523 buf->v4lbuf.field = V4L2_FIELD_NONE;
524 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
525 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
526 return 0;
527 }
528
529 static int stk_free_sio_buffers(struct stk_camera *dev)
530 {
531 int i;
532 int nbufs;
533 unsigned long flags;
534 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
535 return 0;
536 /*
537 * If any buffers are mapped, we cannot free them at all.
538 */
539 for (i = 0; i < dev->n_sbufs; i++) {
540 if (dev->sio_bufs[i].mapcount > 0)
541 return -EBUSY;
542 }
543 /*
544 * OK, let's do it.
545 */
546 spin_lock_irqsave(&dev->spinlock, flags);
547 INIT_LIST_HEAD(&dev->sio_avail);
548 INIT_LIST_HEAD(&dev->sio_full);
549 nbufs = dev->n_sbufs;
550 dev->n_sbufs = 0;
551 spin_unlock_irqrestore(&dev->spinlock, flags);
552 for (i = 0; i < nbufs; i++) {
553 if (dev->sio_bufs[i].buffer != NULL)
554 vfree(dev->sio_bufs[i].buffer);
555 }
556 kfree(dev->sio_bufs);
557 dev->sio_bufs = NULL;
558 return 0;
559 }
560
561 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
562 {
563 int i;
564 if (dev->sio_bufs != NULL)
565 STK_ERROR("sio_bufs already allocated\n");
566 else {
567 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
568 GFP_KERNEL);
569 if (dev->sio_bufs == NULL)
570 return -ENOMEM;
571 for (i = 0; i < n_sbufs; i++) {
572 if (stk_setup_siobuf(dev, i))
573 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
574 dev->n_sbufs = i+1;
575 }
576 }
577 return 0;
578 }
579
580 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
581 {
582 int err;
583 err = stk_prepare_iso(dev);
584 if (err) {
585 stk_clean_iso(dev);
586 return err;
587 }
588 err = stk_prepare_sio_buffers(dev, n_sbufs);
589 if (err) {
590 stk_free_sio_buffers(dev);
591 return err;
592 }
593 return 0;
594 }
595
596 static void stk_free_buffers(struct stk_camera *dev)
597 {
598 stk_clean_iso(dev);
599 stk_free_sio_buffers(dev);
600 }
601 /* -------------------------------------------- */
602
603 /* v4l file operations */
604
605 static int v4l_stk_open(struct file *fp)
606 {
607 struct stk_camera *dev = video_drvdata(fp);
608 int err;
609
610 if (dev == NULL || !is_present(dev))
611 return -ENXIO;
612
613 if (mutex_lock_interruptible(&dev->lock))
614 return -ERESTARTSYS;
615 if (!dev->first_init)
616 stk_camera_write_reg(dev, 0x0, 0x24);
617 else
618 dev->first_init = 0;
619
620 err = v4l2_fh_open(fp);
621 if (!err)
622 usb_autopm_get_interface(dev->interface);
623 mutex_unlock(&dev->lock);
624 return err;
625 }
626
627 static int v4l_stk_release(struct file *fp)
628 {
629 struct stk_camera *dev = video_drvdata(fp);
630
631 mutex_lock(&dev->lock);
632 if (dev->owner == fp) {
633 stk_stop_stream(dev);
634 stk_free_buffers(dev);
635 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
636 unset_initialised(dev);
637 dev->owner = NULL;
638 }
639
640 if (is_present(dev))
641 usb_autopm_put_interface(dev->interface);
642 mutex_unlock(&dev->lock);
643 return v4l2_fh_release(fp);
644 }
645
646 static ssize_t stk_read(struct file *fp, char __user *buf,
647 size_t count, loff_t *f_pos)
648 {
649 int i;
650 int ret;
651 unsigned long flags;
652 struct stk_sio_buffer *sbuf;
653 struct stk_camera *dev = video_drvdata(fp);
654
655 if (!is_present(dev))
656 return -EIO;
657 if (dev->owner && (!dev->reading || dev->owner != fp))
658 return -EBUSY;
659 dev->owner = fp;
660 if (!is_streaming(dev)) {
661 if (stk_initialise(dev)
662 || stk_allocate_buffers(dev, 3)
663 || stk_start_stream(dev))
664 return -ENOMEM;
665 dev->reading = 1;
666 spin_lock_irqsave(&dev->spinlock, flags);
667 for (i = 0; i < dev->n_sbufs; i++) {
668 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
669 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
670 }
671 spin_unlock_irqrestore(&dev->spinlock, flags);
672 }
673 if (*f_pos == 0) {
674 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
675 return -EWOULDBLOCK;
676 ret = wait_event_interruptible(dev->wait_frame,
677 !list_empty(&dev->sio_full) || !is_present(dev));
678 if (ret)
679 return ret;
680 if (!is_present(dev))
681 return -EIO;
682 }
683 if (count + *f_pos > dev->frame_size)
684 count = dev->frame_size - *f_pos;
685 spin_lock_irqsave(&dev->spinlock, flags);
686 if (list_empty(&dev->sio_full)) {
687 spin_unlock_irqrestore(&dev->spinlock, flags);
688 STK_ERROR("BUG: No siobufs ready\n");
689 return 0;
690 }
691 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
692 spin_unlock_irqrestore(&dev->spinlock, flags);
693
694 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
695 return -EFAULT;
696
697 *f_pos += count;
698
699 if (*f_pos >= dev->frame_size) {
700 *f_pos = 0;
701 spin_lock_irqsave(&dev->spinlock, flags);
702 list_move_tail(&sbuf->list, &dev->sio_avail);
703 spin_unlock_irqrestore(&dev->spinlock, flags);
704 }
705 return count;
706 }
707
708 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
709 size_t count, loff_t *f_pos)
710 {
711 struct stk_camera *dev = video_drvdata(fp);
712 int ret;
713
714 if (mutex_lock_interruptible(&dev->lock))
715 return -ERESTARTSYS;
716 ret = stk_read(fp, buf, count, f_pos);
717 mutex_unlock(&dev->lock);
718 return ret;
719 }
720
721 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
722 {
723 struct stk_camera *dev = video_drvdata(fp);
724 unsigned res = v4l2_ctrl_poll(fp, wait);
725
726 poll_wait(fp, &dev->wait_frame, wait);
727
728 if (!is_present(dev))
729 return POLLERR;
730
731 if (!list_empty(&dev->sio_full))
732 return res | POLLIN | POLLRDNORM;
733
734 return res;
735 }
736
737
738 static void stk_v4l_vm_open(struct vm_area_struct *vma)
739 {
740 struct stk_sio_buffer *sbuf = vma->vm_private_data;
741 sbuf->mapcount++;
742 }
743 static void stk_v4l_vm_close(struct vm_area_struct *vma)
744 {
745 struct stk_sio_buffer *sbuf = vma->vm_private_data;
746 sbuf->mapcount--;
747 if (sbuf->mapcount == 0)
748 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
749 }
750 static const struct vm_operations_struct stk_v4l_vm_ops = {
751 .open = stk_v4l_vm_open,
752 .close = stk_v4l_vm_close
753 };
754
755 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
756 {
757 unsigned int i;
758 int ret;
759 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
760 struct stk_camera *dev = video_drvdata(fp);
761 struct stk_sio_buffer *sbuf = NULL;
762
763 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
764 return -EINVAL;
765
766 for (i = 0; i < dev->n_sbufs; i++) {
767 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
768 sbuf = dev->sio_bufs + i;
769 break;
770 }
771 }
772 if (sbuf == NULL)
773 return -EINVAL;
774 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
775 if (ret)
776 return ret;
777 vma->vm_flags |= VM_DONTEXPAND;
778 vma->vm_private_data = sbuf;
779 vma->vm_ops = &stk_v4l_vm_ops;
780 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
781 stk_v4l_vm_open(vma);
782 return 0;
783 }
784
785 /* v4l ioctl handlers */
786
787 static int stk_vidioc_querycap(struct file *filp,
788 void *priv, struct v4l2_capability *cap)
789 {
790 struct stk_camera *dev = video_drvdata(filp);
791
792 strcpy(cap->driver, "stk");
793 strcpy(cap->card, "stk");
794 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
795
796 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
797 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
798 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
799 return 0;
800 }
801
802 static int stk_vidioc_enum_input(struct file *filp,
803 void *priv, struct v4l2_input *input)
804 {
805 if (input->index != 0)
806 return -EINVAL;
807
808 strcpy(input->name, "Syntek USB Camera");
809 input->type = V4L2_INPUT_TYPE_CAMERA;
810 return 0;
811 }
812
813
814 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
815 {
816 *i = 0;
817 return 0;
818 }
819
820 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
821 {
822 return i ? -EINVAL : 0;
823 }
824
825 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
826 {
827 struct stk_camera *dev =
828 container_of(ctrl->handler, struct stk_camera, hdl);
829
830 switch (ctrl->id) {
831 case V4L2_CID_BRIGHTNESS:
832 return stk_sensor_set_brightness(dev, ctrl->val);
833 case V4L2_CID_HFLIP:
834 if (dmi_check_system(stk_upside_down_dmi_table))
835 dev->vsettings.hflip = !ctrl->val;
836 else
837 dev->vsettings.hflip = ctrl->val;
838 return 0;
839 case V4L2_CID_VFLIP:
840 if (dmi_check_system(stk_upside_down_dmi_table))
841 dev->vsettings.vflip = !ctrl->val;
842 else
843 dev->vsettings.vflip = ctrl->val;
844 return 0;
845 default:
846 return -EINVAL;
847 }
848 return 0;
849 }
850
851
852 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
853 void *priv, struct v4l2_fmtdesc *fmtd)
854 {
855 switch (fmtd->index) {
856 case 0:
857 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
858 strcpy(fmtd->description, "r5g6b5");
859 break;
860 case 1:
861 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
862 strcpy(fmtd->description, "r5g6b5BE");
863 break;
864 case 2:
865 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
866 strcpy(fmtd->description, "yuv4:2:2");
867 break;
868 case 3:
869 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
870 strcpy(fmtd->description, "Raw bayer");
871 break;
872 case 4:
873 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
874 strcpy(fmtd->description, "yuv4:2:2");
875 break;
876 default:
877 return -EINVAL;
878 }
879 return 0;
880 }
881
882 static struct stk_size {
883 unsigned w;
884 unsigned h;
885 enum stk_mode m;
886 } stk_sizes[] = {
887 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
888 { .w = 640, .h = 480, .m = MODE_VGA, },
889 { .w = 352, .h = 288, .m = MODE_CIF, },
890 { .w = 320, .h = 240, .m = MODE_QVGA, },
891 { .w = 176, .h = 144, .m = MODE_QCIF, },
892 };
893
894 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
895 void *priv, struct v4l2_format *f)
896 {
897 struct v4l2_pix_format *pix_format = &f->fmt.pix;
898 struct stk_camera *dev = video_drvdata(filp);
899 int i;
900
901 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
902 stk_sizes[i].m != dev->vsettings.mode; i++)
903 ;
904 if (i == ARRAY_SIZE(stk_sizes)) {
905 STK_ERROR("ERROR: mode invalid\n");
906 return -EINVAL;
907 }
908 pix_format->width = stk_sizes[i].w;
909 pix_format->height = stk_sizes[i].h;
910 pix_format->field = V4L2_FIELD_NONE;
911 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
912 pix_format->pixelformat = dev->vsettings.palette;
913 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
914 pix_format->bytesperline = pix_format->width;
915 else
916 pix_format->bytesperline = 2 * pix_format->width;
917 pix_format->sizeimage = pix_format->bytesperline
918 * pix_format->height;
919 pix_format->priv = 0;
920 return 0;
921 }
922
923 static int stk_try_fmt_vid_cap(struct file *filp,
924 struct v4l2_format *fmtd, int *idx)
925 {
926 int i;
927 switch (fmtd->fmt.pix.pixelformat) {
928 case V4L2_PIX_FMT_RGB565:
929 case V4L2_PIX_FMT_RGB565X:
930 case V4L2_PIX_FMT_UYVY:
931 case V4L2_PIX_FMT_YUYV:
932 case V4L2_PIX_FMT_SBGGR8:
933 break;
934 default:
935 return -EINVAL;
936 }
937 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
938 if (fmtd->fmt.pix.width > stk_sizes[i].w)
939 break;
940 }
941 if (i == ARRAY_SIZE(stk_sizes)
942 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
943 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
944 fmtd->fmt.pix.height = stk_sizes[i-1].h;
945 fmtd->fmt.pix.width = stk_sizes[i-1].w;
946 if (idx)
947 *idx = i - 1;
948 } else {
949 fmtd->fmt.pix.height = stk_sizes[i].h;
950 fmtd->fmt.pix.width = stk_sizes[i].w;
951 if (idx)
952 *idx = i;
953 }
954
955 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
956 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
957 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
958 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
959 else
960 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
961 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
962 * fmtd->fmt.pix.height;
963 fmtd->fmt.pix.priv = 0;
964 return 0;
965 }
966
967 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
968 void *priv, struct v4l2_format *fmtd)
969 {
970 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
971 }
972
973 static int stk_setup_format(struct stk_camera *dev)
974 {
975 int i = 0;
976 int depth;
977 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
978 depth = 1;
979 else
980 depth = 2;
981 while (i < ARRAY_SIZE(stk_sizes) &&
982 stk_sizes[i].m != dev->vsettings.mode)
983 i++;
984 if (i == ARRAY_SIZE(stk_sizes)) {
985 STK_ERROR("Something is broken in %s\n", __func__);
986 return -EFAULT;
987 }
988 /* This registers controls some timings, not sure of what. */
989 stk_camera_write_reg(dev, 0x001b, 0x0e);
990 if (dev->vsettings.mode == MODE_SXGA)
991 stk_camera_write_reg(dev, 0x001c, 0x0e);
992 else
993 stk_camera_write_reg(dev, 0x001c, 0x46);
994 /*
995 * Registers 0x0115 0x0114 are the size of each line (bytes),
996 * regs 0x0117 0x0116 are the heigth of the image.
997 */
998 stk_camera_write_reg(dev, 0x0115,
999 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1000 stk_camera_write_reg(dev, 0x0114,
1001 (stk_sizes[i].w * depth) & 0xff);
1002 stk_camera_write_reg(dev, 0x0117,
1003 (stk_sizes[i].h >> 8) & 0xff);
1004 stk_camera_write_reg(dev, 0x0116,
1005 stk_sizes[i].h & 0xff);
1006 return stk_sensor_configure(dev);
1007 }
1008
1009 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1010 void *priv, struct v4l2_format *fmtd)
1011 {
1012 int ret;
1013 int idx;
1014 struct stk_camera *dev = video_drvdata(filp);
1015
1016 if (dev == NULL)
1017 return -ENODEV;
1018 if (!is_present(dev))
1019 return -ENODEV;
1020 if (is_streaming(dev))
1021 return -EBUSY;
1022 if (dev->owner)
1023 return -EBUSY;
1024 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1025 if (ret)
1026 return ret;
1027
1028 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1029 stk_free_buffers(dev);
1030 dev->frame_size = fmtd->fmt.pix.sizeimage;
1031 dev->vsettings.mode = stk_sizes[idx].m;
1032
1033 stk_initialise(dev);
1034 return stk_setup_format(dev);
1035 }
1036
1037 static int stk_vidioc_reqbufs(struct file *filp,
1038 void *priv, struct v4l2_requestbuffers *rb)
1039 {
1040 struct stk_camera *dev = video_drvdata(filp);
1041
1042 if (dev == NULL)
1043 return -ENODEV;
1044 if (rb->memory != V4L2_MEMORY_MMAP)
1045 return -EINVAL;
1046 if (is_streaming(dev)
1047 || (dev->owner && dev->owner != filp))
1048 return -EBUSY;
1049 stk_free_buffers(dev);
1050 if (rb->count == 0) {
1051 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1052 unset_initialised(dev);
1053 dev->owner = NULL;
1054 return 0;
1055 }
1056 dev->owner = filp;
1057
1058 /*FIXME If they ask for zero, we must stop streaming and free */
1059 if (rb->count < 3)
1060 rb->count = 3;
1061 /* Arbitrary limit */
1062 else if (rb->count > 5)
1063 rb->count = 5;
1064
1065 stk_allocate_buffers(dev, rb->count);
1066 rb->count = dev->n_sbufs;
1067 return 0;
1068 }
1069
1070 static int stk_vidioc_querybuf(struct file *filp,
1071 void *priv, struct v4l2_buffer *buf)
1072 {
1073 struct stk_camera *dev = video_drvdata(filp);
1074 struct stk_sio_buffer *sbuf;
1075
1076 if (buf->index >= dev->n_sbufs)
1077 return -EINVAL;
1078 sbuf = dev->sio_bufs + buf->index;
1079 *buf = sbuf->v4lbuf;
1080 return 0;
1081 }
1082
1083 static int stk_vidioc_qbuf(struct file *filp,
1084 void *priv, struct v4l2_buffer *buf)
1085 {
1086 struct stk_camera *dev = video_drvdata(filp);
1087 struct stk_sio_buffer *sbuf;
1088 unsigned long flags;
1089
1090 if (buf->memory != V4L2_MEMORY_MMAP)
1091 return -EINVAL;
1092
1093 if (buf->index >= dev->n_sbufs)
1094 return -EINVAL;
1095 sbuf = dev->sio_bufs + buf->index;
1096 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1097 return 0;
1098 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1099 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1100 spin_lock_irqsave(&dev->spinlock, flags);
1101 list_add_tail(&sbuf->list, &dev->sio_avail);
1102 *buf = sbuf->v4lbuf;
1103 spin_unlock_irqrestore(&dev->spinlock, flags);
1104 return 0;
1105 }
1106
1107 static int stk_vidioc_dqbuf(struct file *filp,
1108 void *priv, struct v4l2_buffer *buf)
1109 {
1110 struct stk_camera *dev = video_drvdata(filp);
1111 struct stk_sio_buffer *sbuf;
1112 unsigned long flags;
1113 int ret;
1114
1115 if (!is_streaming(dev))
1116 return -EINVAL;
1117
1118 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1119 return -EWOULDBLOCK;
1120 ret = wait_event_interruptible(dev->wait_frame,
1121 !list_empty(&dev->sio_full) || !is_present(dev));
1122 if (ret)
1123 return ret;
1124 if (!is_present(dev))
1125 return -EIO;
1126
1127 spin_lock_irqsave(&dev->spinlock, flags);
1128 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1129 list_del_init(&sbuf->list);
1130 spin_unlock_irqrestore(&dev->spinlock, flags);
1131 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1132 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1133 sbuf->v4lbuf.sequence = ++dev->sequence;
1134 v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1135
1136 *buf = sbuf->v4lbuf;
1137 return 0;
1138 }
1139
1140 static int stk_vidioc_streamon(struct file *filp,
1141 void *priv, enum v4l2_buf_type type)
1142 {
1143 struct stk_camera *dev = video_drvdata(filp);
1144 if (is_streaming(dev))
1145 return 0;
1146 if (dev->sio_bufs == NULL)
1147 return -EINVAL;
1148 dev->sequence = 0;
1149 return stk_start_stream(dev);
1150 }
1151
1152 static int stk_vidioc_streamoff(struct file *filp,
1153 void *priv, enum v4l2_buf_type type)
1154 {
1155 struct stk_camera *dev = video_drvdata(filp);
1156 unsigned long flags;
1157 int i;
1158 stk_stop_stream(dev);
1159 spin_lock_irqsave(&dev->spinlock, flags);
1160 INIT_LIST_HEAD(&dev->sio_avail);
1161 INIT_LIST_HEAD(&dev->sio_full);
1162 for (i = 0; i < dev->n_sbufs; i++) {
1163 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1164 dev->sio_bufs[i].v4lbuf.flags = 0;
1165 }
1166 spin_unlock_irqrestore(&dev->spinlock, flags);
1167 return 0;
1168 }
1169
1170
1171 static int stk_vidioc_g_parm(struct file *filp,
1172 void *priv, struct v4l2_streamparm *sp)
1173 {
1174 /*FIXME This is not correct */
1175 sp->parm.capture.timeperframe.numerator = 1;
1176 sp->parm.capture.timeperframe.denominator = 30;
1177 sp->parm.capture.readbuffers = 2;
1178 return 0;
1179 }
1180
1181 static int stk_vidioc_enum_framesizes(struct file *filp,
1182 void *priv, struct v4l2_frmsizeenum *frms)
1183 {
1184 if (frms->index >= ARRAY_SIZE(stk_sizes))
1185 return -EINVAL;
1186 switch (frms->pixel_format) {
1187 case V4L2_PIX_FMT_RGB565:
1188 case V4L2_PIX_FMT_RGB565X:
1189 case V4L2_PIX_FMT_UYVY:
1190 case V4L2_PIX_FMT_YUYV:
1191 case V4L2_PIX_FMT_SBGGR8:
1192 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1193 frms->discrete.width = stk_sizes[frms->index].w;
1194 frms->discrete.height = stk_sizes[frms->index].h;
1195 return 0;
1196 default: return -EINVAL;
1197 }
1198 }
1199
1200 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1201 .s_ctrl = stk_s_ctrl,
1202 };
1203
1204 static struct v4l2_file_operations v4l_stk_fops = {
1205 .owner = THIS_MODULE,
1206 .open = v4l_stk_open,
1207 .release = v4l_stk_release,
1208 .read = v4l_stk_read,
1209 .poll = v4l_stk_poll,
1210 .mmap = v4l_stk_mmap,
1211 .unlocked_ioctl = video_ioctl2,
1212 };
1213
1214 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1215 .vidioc_querycap = stk_vidioc_querycap,
1216 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1217 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1218 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1219 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1220 .vidioc_enum_input = stk_vidioc_enum_input,
1221 .vidioc_s_input = stk_vidioc_s_input,
1222 .vidioc_g_input = stk_vidioc_g_input,
1223 .vidioc_reqbufs = stk_vidioc_reqbufs,
1224 .vidioc_querybuf = stk_vidioc_querybuf,
1225 .vidioc_qbuf = stk_vidioc_qbuf,
1226 .vidioc_dqbuf = stk_vidioc_dqbuf,
1227 .vidioc_streamon = stk_vidioc_streamon,
1228 .vidioc_streamoff = stk_vidioc_streamoff,
1229 .vidioc_g_parm = stk_vidioc_g_parm,
1230 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1231 .vidioc_log_status = v4l2_ctrl_log_status,
1232 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1233 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1234 };
1235
1236 static void stk_v4l_dev_release(struct video_device *vd)
1237 {
1238 struct stk_camera *dev = vdev_to_camera(vd);
1239
1240 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1241 STK_ERROR("We are leaking memory\n");
1242 usb_put_intf(dev->interface);
1243 kfree(dev);
1244 }
1245
1246 static struct video_device stk_v4l_data = {
1247 .name = "stkwebcam",
1248 .fops = &v4l_stk_fops,
1249 .ioctl_ops = &v4l_stk_ioctl_ops,
1250 .release = stk_v4l_dev_release,
1251 };
1252
1253
1254 static int stk_register_video_device(struct stk_camera *dev)
1255 {
1256 int err;
1257
1258 dev->vdev = stk_v4l_data;
1259 dev->vdev.lock = &dev->lock;
1260 dev->vdev.debug = debug;
1261 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1262 set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
1263 video_set_drvdata(&dev->vdev, dev);
1264 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1265 if (err)
1266 STK_ERROR("v4l registration failed\n");
1267 else
1268 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1269 video_device_node_name(&dev->vdev));
1270 return err;
1271 }
1272
1273
1274 /* USB Stuff */
1275
1276 static int stk_camera_probe(struct usb_interface *interface,
1277 const struct usb_device_id *id)
1278 {
1279 struct v4l2_ctrl_handler *hdl;
1280 int err = 0;
1281 int i;
1282
1283 struct stk_camera *dev = NULL;
1284 struct usb_device *udev = interface_to_usbdev(interface);
1285 struct usb_host_interface *iface_desc;
1286 struct usb_endpoint_descriptor *endpoint;
1287
1288 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1289 if (dev == NULL) {
1290 STK_ERROR("Out of memory !\n");
1291 return -ENOMEM;
1292 }
1293 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1294 if (err < 0) {
1295 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1296 kfree(dev);
1297 return err;
1298 }
1299 hdl = &dev->hdl;
1300 v4l2_ctrl_handler_init(hdl, 3);
1301 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1302 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1303 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1304 V4L2_CID_HFLIP, 0, 1, 1, 1);
1305 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1306 V4L2_CID_VFLIP, 0, 1, 1, 1);
1307 if (hdl->error) {
1308 err = hdl->error;
1309 dev_err(&udev->dev, "couldn't register control\n");
1310 goto error;
1311 }
1312 dev->v4l2_dev.ctrl_handler = hdl;
1313
1314 spin_lock_init(&dev->spinlock);
1315 mutex_init(&dev->lock);
1316 init_waitqueue_head(&dev->wait_frame);
1317 dev->first_init = 1; /* webcam LED management */
1318
1319 dev->udev = udev;
1320 dev->interface = interface;
1321 usb_get_intf(interface);
1322
1323 if (hflip != -1)
1324 dev->vsettings.hflip = hflip;
1325 else if (dmi_check_system(stk_upside_down_dmi_table))
1326 dev->vsettings.hflip = 1;
1327 else
1328 dev->vsettings.hflip = 0;
1329 if (vflip != -1)
1330 dev->vsettings.vflip = vflip;
1331 else if (dmi_check_system(stk_upside_down_dmi_table))
1332 dev->vsettings.vflip = 1;
1333 else
1334 dev->vsettings.vflip = 0;
1335 dev->n_sbufs = 0;
1336 set_present(dev);
1337
1338 /* Set up the endpoint information
1339 * use only the first isoc-in endpoint
1340 * for the current alternate setting */
1341 iface_desc = interface->cur_altsetting;
1342
1343 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1344 endpoint = &iface_desc->endpoint[i].desc;
1345
1346 if (!dev->isoc_ep
1347 && usb_endpoint_is_isoc_in(endpoint)) {
1348 /* we found an isoc in endpoint */
1349 dev->isoc_ep = usb_endpoint_num(endpoint);
1350 break;
1351 }
1352 }
1353 if (!dev->isoc_ep) {
1354 STK_ERROR("Could not find isoc-in endpoint");
1355 err = -ENODEV;
1356 goto error;
1357 }
1358 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1359 dev->vsettings.mode = MODE_VGA;
1360 dev->frame_size = 640 * 480 * 2;
1361
1362 INIT_LIST_HEAD(&dev->sio_avail);
1363 INIT_LIST_HEAD(&dev->sio_full);
1364
1365 usb_set_intfdata(interface, dev);
1366
1367 err = stk_register_video_device(dev);
1368 if (err)
1369 goto error;
1370
1371 return 0;
1372
1373 error:
1374 v4l2_ctrl_handler_free(hdl);
1375 v4l2_device_unregister(&dev->v4l2_dev);
1376 kfree(dev);
1377 return err;
1378 }
1379
1380 static void stk_camera_disconnect(struct usb_interface *interface)
1381 {
1382 struct stk_camera *dev = usb_get_intfdata(interface);
1383
1384 usb_set_intfdata(interface, NULL);
1385 unset_present(dev);
1386
1387 wake_up_interruptible(&dev->wait_frame);
1388
1389 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1390 video_device_node_name(&dev->vdev));
1391
1392 video_unregister_device(&dev->vdev);
1393 v4l2_ctrl_handler_free(&dev->hdl);
1394 v4l2_device_unregister(&dev->v4l2_dev);
1395 }
1396
1397 #ifdef CONFIG_PM
1398 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1399 {
1400 struct stk_camera *dev = usb_get_intfdata(intf);
1401 if (is_streaming(dev)) {
1402 stk_stop_stream(dev);
1403 /* yes, this is ugly */
1404 set_streaming(dev);
1405 }
1406 return 0;
1407 }
1408
1409 static int stk_camera_resume(struct usb_interface *intf)
1410 {
1411 struct stk_camera *dev = usb_get_intfdata(intf);
1412 if (!is_initialised(dev))
1413 return 0;
1414 unset_initialised(dev);
1415 stk_initialise(dev);
1416 stk_camera_write_reg(dev, 0x0, 0x49);
1417 stk_setup_format(dev);
1418 if (is_streaming(dev))
1419 stk_start_stream(dev);
1420 return 0;
1421 }
1422 #endif
1423
1424 static struct usb_driver stk_camera_driver = {
1425 .name = "stkwebcam",
1426 .probe = stk_camera_probe,
1427 .disconnect = stk_camera_disconnect,
1428 .id_table = stkwebcam_table,
1429 #ifdef CONFIG_PM
1430 .suspend = stk_camera_suspend,
1431 .resume = stk_camera_resume,
1432 #endif
1433 };
1434
1435 module_usb_driver(stk_camera_driver);
Linux kernel - Deliverables
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