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net: qmi_wwan: add Olivetti Olicard 500
[linux/fpc-iii.git] / drivers / media / usb / stkwebcam / stk-webcam.c
blobbe77482c30704a5b81615199f563770c0147ec0f
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 STK_ERROR("Failed to allocate URB %d\n", i);
457 goto isobufs_out;
458 }
459 dev->isobufs[i].urb = urb;
460 } else {
461 STK_ERROR("Killing URB\n");
462 usb_kill_urb(dev->isobufs[i].urb);
463 urb = dev->isobufs[i].urb;
464 }
465 urb->interval = 1;
466 urb->dev = udev;
467 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
468 urb->transfer_flags = URB_ISO_ASAP;
469 urb->transfer_buffer = dev->isobufs[i].data;
470 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
471 urb->complete = stk_isoc_handler;
472 urb->context = dev;
473 urb->start_frame = 0;
474 urb->number_of_packets = ISO_FRAMES_PER_DESC;
475
476 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
477 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
478 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
479 }
480 }
481 set_memallocd(dev);
482 return 0;
483
484 isobufs_out:
485 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
486 kfree(dev->isobufs[i].data);
487 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
488 usb_free_urb(dev->isobufs[i].urb);
489 kfree(dev->isobufs);
490 dev->isobufs = NULL;
491 return -ENOMEM;
492 }
493
494 static void stk_clean_iso(struct stk_camera *dev)
495 {
496 int i;
497
498 if (dev == NULL || dev->isobufs == NULL)
499 return;
500
501 for (i = 0; i < MAX_ISO_BUFS; i++) {
502 struct urb *urb;
503
504 urb = dev->isobufs[i].urb;
505 if (urb) {
506 if (atomic_read(&dev->urbs_used) && is_present(dev))
507 usb_kill_urb(urb);
508 usb_free_urb(urb);
509 }
510 kfree(dev->isobufs[i].data);
511 }
512 kfree(dev->isobufs);
513 dev->isobufs = NULL;
514 unset_memallocd(dev);
515 }
516
517 static int stk_setup_siobuf(struct stk_camera *dev, int index)
518 {
519 struct stk_sio_buffer *buf = dev->sio_bufs + index;
520 INIT_LIST_HEAD(&buf->list);
521 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
522 buf->buffer = vmalloc_user(buf->v4lbuf.length);
523 if (buf->buffer == NULL)
524 return -ENOMEM;
525 buf->mapcount = 0;
526 buf->dev = dev;
527 buf->v4lbuf.index = index;
528 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
529 buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
530 buf->v4lbuf.field = V4L2_FIELD_NONE;
531 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
532 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
533 return 0;
534 }
535
536 static int stk_free_sio_buffers(struct stk_camera *dev)
537 {
538 int i;
539 int nbufs;
540 unsigned long flags;
541 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
542 return 0;
543 /*
544 * If any buffers are mapped, we cannot free them at all.
545 */
546 for (i = 0; i < dev->n_sbufs; i++) {
547 if (dev->sio_bufs[i].mapcount > 0)
548 return -EBUSY;
549 }
550 /*
551 * OK, let's do it.
552 */
553 spin_lock_irqsave(&dev->spinlock, flags);
554 INIT_LIST_HEAD(&dev->sio_avail);
555 INIT_LIST_HEAD(&dev->sio_full);
556 nbufs = dev->n_sbufs;
557 dev->n_sbufs = 0;
558 spin_unlock_irqrestore(&dev->spinlock, flags);
559 for (i = 0; i < nbufs; i++) {
560 if (dev->sio_bufs[i].buffer != NULL)
561 vfree(dev->sio_bufs[i].buffer);
562 }
563 kfree(dev->sio_bufs);
564 dev->sio_bufs = NULL;
565 return 0;
566 }
567
568 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
569 {
570 int i;
571 if (dev->sio_bufs != NULL)
572 STK_ERROR("sio_bufs already allocated\n");
573 else {
574 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
575 GFP_KERNEL);
576 if (dev->sio_bufs == NULL)
577 return -ENOMEM;
578 for (i = 0; i < n_sbufs; i++) {
579 if (stk_setup_siobuf(dev, i))
580 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
581 dev->n_sbufs = i+1;
582 }
583 }
584 return 0;
585 }
586
587 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
588 {
589 int err;
590 err = stk_prepare_iso(dev);
591 if (err) {
592 stk_clean_iso(dev);
593 return err;
594 }
595 err = stk_prepare_sio_buffers(dev, n_sbufs);
596 if (err) {
597 stk_free_sio_buffers(dev);
598 return err;
599 }
600 return 0;
601 }
602
603 static void stk_free_buffers(struct stk_camera *dev)
604 {
605 stk_clean_iso(dev);
606 stk_free_sio_buffers(dev);
607 }
608 /* -------------------------------------------- */
609
610 /* v4l file operations */
611
612 static int v4l_stk_open(struct file *fp)
613 {
614 struct stk_camera *dev = video_drvdata(fp);
615 int err;
616
617 if (dev == NULL || !is_present(dev))
618 return -ENXIO;
619
620 if (mutex_lock_interruptible(&dev->lock))
621 return -ERESTARTSYS;
622 if (!dev->first_init)
623 stk_camera_write_reg(dev, 0x0, 0x24);
624 else
625 dev->first_init = 0;
626
627 err = v4l2_fh_open(fp);
628 if (!err)
629 usb_autopm_get_interface(dev->interface);
630 mutex_unlock(&dev->lock);
631 return err;
632 }
633
634 static int v4l_stk_release(struct file *fp)
635 {
636 struct stk_camera *dev = video_drvdata(fp);
637
638 mutex_lock(&dev->lock);
639 if (dev->owner == fp) {
640 stk_stop_stream(dev);
641 stk_free_buffers(dev);
642 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
643 unset_initialised(dev);
644 dev->owner = NULL;
645 }
646
647 if (is_present(dev))
648 usb_autopm_put_interface(dev->interface);
649 mutex_unlock(&dev->lock);
650 return v4l2_fh_release(fp);
651 }
652
653 static ssize_t stk_read(struct file *fp, char __user *buf,
654 size_t count, loff_t *f_pos)
655 {
656 int i;
657 int ret;
658 unsigned long flags;
659 struct stk_sio_buffer *sbuf;
660 struct stk_camera *dev = video_drvdata(fp);
661
662 if (!is_present(dev))
663 return -EIO;
664 if (dev->owner && (!dev->reading || dev->owner != fp))
665 return -EBUSY;
666 dev->owner = fp;
667 if (!is_streaming(dev)) {
668 if (stk_initialise(dev)
669 || stk_allocate_buffers(dev, 3)
670 || stk_start_stream(dev))
671 return -ENOMEM;
672 dev->reading = 1;
673 spin_lock_irqsave(&dev->spinlock, flags);
674 for (i = 0; i < dev->n_sbufs; i++) {
675 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
676 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
677 }
678 spin_unlock_irqrestore(&dev->spinlock, flags);
679 }
680 if (*f_pos == 0) {
681 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
682 return -EWOULDBLOCK;
683 ret = wait_event_interruptible(dev->wait_frame,
684 !list_empty(&dev->sio_full) || !is_present(dev));
685 if (ret)
686 return ret;
687 if (!is_present(dev))
688 return -EIO;
689 }
690 if (count + *f_pos > dev->frame_size)
691 count = dev->frame_size - *f_pos;
692 spin_lock_irqsave(&dev->spinlock, flags);
693 if (list_empty(&dev->sio_full)) {
694 spin_unlock_irqrestore(&dev->spinlock, flags);
695 STK_ERROR("BUG: No siobufs ready\n");
696 return 0;
697 }
698 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
699 spin_unlock_irqrestore(&dev->spinlock, flags);
700
701 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
702 return -EFAULT;
703
704 *f_pos += count;
705
706 if (*f_pos >= dev->frame_size) {
707 *f_pos = 0;
708 spin_lock_irqsave(&dev->spinlock, flags);
709 list_move_tail(&sbuf->list, &dev->sio_avail);
710 spin_unlock_irqrestore(&dev->spinlock, flags);
711 }
712 return count;
713 }
714
715 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
716 size_t count, loff_t *f_pos)
717 {
718 struct stk_camera *dev = video_drvdata(fp);
719 int ret;
720
721 if (mutex_lock_interruptible(&dev->lock))
722 return -ERESTARTSYS;
723 ret = stk_read(fp, buf, count, f_pos);
724 mutex_unlock(&dev->lock);
725 return ret;
726 }
727
728 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
729 {
730 struct stk_camera *dev = video_drvdata(fp);
731 unsigned res = v4l2_ctrl_poll(fp, wait);
732
733 poll_wait(fp, &dev->wait_frame, wait);
734
735 if (!is_present(dev))
736 return POLLERR;
737
738 if (!list_empty(&dev->sio_full))
739 return res | POLLIN | POLLRDNORM;
740
741 return res;
742 }
743
744
745 static void stk_v4l_vm_open(struct vm_area_struct *vma)
746 {
747 struct stk_sio_buffer *sbuf = vma->vm_private_data;
748 sbuf->mapcount++;
749 }
750 static void stk_v4l_vm_close(struct vm_area_struct *vma)
751 {
752 struct stk_sio_buffer *sbuf = vma->vm_private_data;
753 sbuf->mapcount--;
754 if (sbuf->mapcount == 0)
755 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
756 }
757 static const struct vm_operations_struct stk_v4l_vm_ops = {
758 .open = stk_v4l_vm_open,
759 .close = stk_v4l_vm_close
760 };
761
762 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
763 {
764 unsigned int i;
765 int ret;
766 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
767 struct stk_camera *dev = video_drvdata(fp);
768 struct stk_sio_buffer *sbuf = NULL;
769
770 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
771 return -EINVAL;
772
773 for (i = 0; i < dev->n_sbufs; i++) {
774 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
775 sbuf = dev->sio_bufs + i;
776 break;
777 }
778 }
779 if (sbuf == NULL)
780 return -EINVAL;
781 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
782 if (ret)
783 return ret;
784 vma->vm_flags |= VM_DONTEXPAND;
785 vma->vm_private_data = sbuf;
786 vma->vm_ops = &stk_v4l_vm_ops;
787 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
788 stk_v4l_vm_open(vma);
789 return 0;
790 }
791
792 /* v4l ioctl handlers */
793
794 static int stk_vidioc_querycap(struct file *filp,
795 void *priv, struct v4l2_capability *cap)
796 {
797 struct stk_camera *dev = video_drvdata(filp);
798
799 strcpy(cap->driver, "stk");
800 strcpy(cap->card, "stk");
801 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
802
803 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
804 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
805 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
806 return 0;
807 }
808
809 static int stk_vidioc_enum_input(struct file *filp,
810 void *priv, struct v4l2_input *input)
811 {
812 if (input->index != 0)
813 return -EINVAL;
814
815 strcpy(input->name, "Syntek USB Camera");
816 input->type = V4L2_INPUT_TYPE_CAMERA;
817 return 0;
818 }
819
820
821 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
822 {
823 *i = 0;
824 return 0;
825 }
826
827 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
828 {
829 return i ? -EINVAL : 0;
830 }
831
832 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
833 {
834 struct stk_camera *dev =
835 container_of(ctrl->handler, struct stk_camera, hdl);
836
837 switch (ctrl->id) {
838 case V4L2_CID_BRIGHTNESS:
839 return stk_sensor_set_brightness(dev, ctrl->val);
840 case V4L2_CID_HFLIP:
841 if (dmi_check_system(stk_upside_down_dmi_table))
842 dev->vsettings.hflip = !ctrl->val;
843 else
844 dev->vsettings.hflip = ctrl->val;
845 return 0;
846 case V4L2_CID_VFLIP:
847 if (dmi_check_system(stk_upside_down_dmi_table))
848 dev->vsettings.vflip = !ctrl->val;
849 else
850 dev->vsettings.vflip = ctrl->val;
851 return 0;
852 default:
853 return -EINVAL;
854 }
855 return 0;
856 }
857
858
859 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
860 void *priv, struct v4l2_fmtdesc *fmtd)
861 {
862 switch (fmtd->index) {
863 case 0:
864 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
865 strcpy(fmtd->description, "r5g6b5");
866 break;
867 case 1:
868 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
869 strcpy(fmtd->description, "r5g6b5BE");
870 break;
871 case 2:
872 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
873 strcpy(fmtd->description, "yuv4:2:2");
874 break;
875 case 3:
876 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
877 strcpy(fmtd->description, "Raw bayer");
878 break;
879 case 4:
880 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
881 strcpy(fmtd->description, "yuv4:2:2");
882 break;
883 default:
884 return -EINVAL;
885 }
886 return 0;
887 }
888
889 static struct stk_size {
890 unsigned w;
891 unsigned h;
892 enum stk_mode m;
893 } stk_sizes[] = {
894 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
895 { .w = 640, .h = 480, .m = MODE_VGA, },
896 { .w = 352, .h = 288, .m = MODE_CIF, },
897 { .w = 320, .h = 240, .m = MODE_QVGA, },
898 { .w = 176, .h = 144, .m = MODE_QCIF, },
899 };
900
901 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
902 void *priv, struct v4l2_format *f)
903 {
904 struct v4l2_pix_format *pix_format = &f->fmt.pix;
905 struct stk_camera *dev = video_drvdata(filp);
906 int i;
907
908 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
909 stk_sizes[i].m != dev->vsettings.mode; i++)
910 ;
911 if (i == ARRAY_SIZE(stk_sizes)) {
912 STK_ERROR("ERROR: mode invalid\n");
913 return -EINVAL;
914 }
915 pix_format->width = stk_sizes[i].w;
916 pix_format->height = stk_sizes[i].h;
917 pix_format->field = V4L2_FIELD_NONE;
918 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
919 pix_format->pixelformat = dev->vsettings.palette;
920 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
921 pix_format->bytesperline = pix_format->width;
922 else
923 pix_format->bytesperline = 2 * pix_format->width;
924 pix_format->sizeimage = pix_format->bytesperline
925 * pix_format->height;
926 pix_format->priv = 0;
927 return 0;
928 }
929
930 static int stk_try_fmt_vid_cap(struct file *filp,
931 struct v4l2_format *fmtd, int *idx)
932 {
933 int i;
934 switch (fmtd->fmt.pix.pixelformat) {
935 case V4L2_PIX_FMT_RGB565:
936 case V4L2_PIX_FMT_RGB565X:
937 case V4L2_PIX_FMT_UYVY:
938 case V4L2_PIX_FMT_YUYV:
939 case V4L2_PIX_FMT_SBGGR8:
940 break;
941 default:
942 return -EINVAL;
943 }
944 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
945 if (fmtd->fmt.pix.width > stk_sizes[i].w)
946 break;
947 }
948 if (i == ARRAY_SIZE(stk_sizes)
949 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
950 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
951 fmtd->fmt.pix.height = stk_sizes[i-1].h;
952 fmtd->fmt.pix.width = stk_sizes[i-1].w;
953 if (idx)
954 *idx = i - 1;
955 } else {
956 fmtd->fmt.pix.height = stk_sizes[i].h;
957 fmtd->fmt.pix.width = stk_sizes[i].w;
958 if (idx)
959 *idx = i;
960 }
961
962 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
963 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
964 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
965 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
966 else
967 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
968 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
969 * fmtd->fmt.pix.height;
970 fmtd->fmt.pix.priv = 0;
971 return 0;
972 }
973
974 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
975 void *priv, struct v4l2_format *fmtd)
976 {
977 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
978 }
979
980 static int stk_setup_format(struct stk_camera *dev)
981 {
982 int i = 0;
983 int depth;
984 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
985 depth = 1;
986 else
987 depth = 2;
988 while (i < ARRAY_SIZE(stk_sizes) &&
989 stk_sizes[i].m != dev->vsettings.mode)
990 i++;
991 if (i == ARRAY_SIZE(stk_sizes)) {
992 STK_ERROR("Something is broken in %s\n", __func__);
993 return -EFAULT;
994 }
995 /* This registers controls some timings, not sure of what. */
996 stk_camera_write_reg(dev, 0x001b, 0x0e);
997 if (dev->vsettings.mode == MODE_SXGA)
998 stk_camera_write_reg(dev, 0x001c, 0x0e);
999 else
1000 stk_camera_write_reg(dev, 0x001c, 0x46);
1001 /*
1002 * Registers 0x0115 0x0114 are the size of each line (bytes),
1003 * regs 0x0117 0x0116 are the heigth of the image.
1004 */
1005 stk_camera_write_reg(dev, 0x0115,
1006 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1007 stk_camera_write_reg(dev, 0x0114,
1008 (stk_sizes[i].w * depth) & 0xff);
1009 stk_camera_write_reg(dev, 0x0117,
1010 (stk_sizes[i].h >> 8) & 0xff);
1011 stk_camera_write_reg(dev, 0x0116,
1012 stk_sizes[i].h & 0xff);
1013 return stk_sensor_configure(dev);
1014 }
1015
1016 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1017 void *priv, struct v4l2_format *fmtd)
1018 {
1019 int ret;
1020 int idx;
1021 struct stk_camera *dev = video_drvdata(filp);
1022
1023 if (dev == NULL)
1024 return -ENODEV;
1025 if (!is_present(dev))
1026 return -ENODEV;
1027 if (is_streaming(dev))
1028 return -EBUSY;
1029 if (dev->owner)
1030 return -EBUSY;
1031 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1032 if (ret)
1033 return ret;
1034
1035 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1036 stk_free_buffers(dev);
1037 dev->frame_size = fmtd->fmt.pix.sizeimage;
1038 dev->vsettings.mode = stk_sizes[idx].m;
1039
1040 stk_initialise(dev);
1041 return stk_setup_format(dev);
1042 }
1043
1044 static int stk_vidioc_reqbufs(struct file *filp,
1045 void *priv, struct v4l2_requestbuffers *rb)
1046 {
1047 struct stk_camera *dev = video_drvdata(filp);
1048
1049 if (dev == NULL)
1050 return -ENODEV;
1051 if (rb->memory != V4L2_MEMORY_MMAP)
1052 return -EINVAL;
1053 if (is_streaming(dev)
1054 || (dev->owner && dev->owner != filp))
1055 return -EBUSY;
1056 stk_free_buffers(dev);
1057 if (rb->count == 0) {
1058 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1059 unset_initialised(dev);
1060 dev->owner = NULL;
1061 return 0;
1062 }
1063 dev->owner = filp;
1064
1065 /*FIXME If they ask for zero, we must stop streaming and free */
1066 if (rb->count < 3)
1067 rb->count = 3;
1068 /* Arbitrary limit */
1069 else if (rb->count > 5)
1070 rb->count = 5;
1071
1072 stk_allocate_buffers(dev, rb->count);
1073 rb->count = dev->n_sbufs;
1074 return 0;
1075 }
1076
1077 static int stk_vidioc_querybuf(struct file *filp,
1078 void *priv, struct v4l2_buffer *buf)
1079 {
1080 struct stk_camera *dev = video_drvdata(filp);
1081 struct stk_sio_buffer *sbuf;
1082
1083 if (buf->index >= dev->n_sbufs)
1084 return -EINVAL;
1085 sbuf = dev->sio_bufs + buf->index;
1086 *buf = sbuf->v4lbuf;
1087 return 0;
1088 }
1089
1090 static int stk_vidioc_qbuf(struct file *filp,
1091 void *priv, struct v4l2_buffer *buf)
1092 {
1093 struct stk_camera *dev = video_drvdata(filp);
1094 struct stk_sio_buffer *sbuf;
1095 unsigned long flags;
1096
1097 if (buf->memory != V4L2_MEMORY_MMAP)
1098 return -EINVAL;
1099
1100 if (buf->index >= dev->n_sbufs)
1101 return -EINVAL;
1102 sbuf = dev->sio_bufs + buf->index;
1103 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1104 return 0;
1105 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1106 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1107 spin_lock_irqsave(&dev->spinlock, flags);
1108 list_add_tail(&sbuf->list, &dev->sio_avail);
1109 *buf = sbuf->v4lbuf;
1110 spin_unlock_irqrestore(&dev->spinlock, flags);
1111 return 0;
1112 }
1113
1114 static int stk_vidioc_dqbuf(struct file *filp,
1115 void *priv, struct v4l2_buffer *buf)
1116 {
1117 struct stk_camera *dev = video_drvdata(filp);
1118 struct stk_sio_buffer *sbuf;
1119 unsigned long flags;
1120 int ret;
1121
1122 if (!is_streaming(dev))
1123 return -EINVAL;
1124
1125 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1126 return -EWOULDBLOCK;
1127 ret = wait_event_interruptible(dev->wait_frame,
1128 !list_empty(&dev->sio_full) || !is_present(dev));
1129 if (ret)
1130 return ret;
1131 if (!is_present(dev))
1132 return -EIO;
1133
1134 spin_lock_irqsave(&dev->spinlock, flags);
1135 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1136 list_del_init(&sbuf->list);
1137 spin_unlock_irqrestore(&dev->spinlock, flags);
1138 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1139 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1140 sbuf->v4lbuf.sequence = ++dev->sequence;
1141 v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1142
1143 *buf = sbuf->v4lbuf;
1144 return 0;
1145 }
1146
1147 static int stk_vidioc_streamon(struct file *filp,
1148 void *priv, enum v4l2_buf_type type)
1149 {
1150 struct stk_camera *dev = video_drvdata(filp);
1151 if (is_streaming(dev))
1152 return 0;
1153 if (dev->sio_bufs == NULL)
1154 return -EINVAL;
1155 dev->sequence = 0;
1156 return stk_start_stream(dev);
1157 }
1158
1159 static int stk_vidioc_streamoff(struct file *filp,
1160 void *priv, enum v4l2_buf_type type)
1161 {
1162 struct stk_camera *dev = video_drvdata(filp);
1163 unsigned long flags;
1164 int i;
1165 stk_stop_stream(dev);
1166 spin_lock_irqsave(&dev->spinlock, flags);
1167 INIT_LIST_HEAD(&dev->sio_avail);
1168 INIT_LIST_HEAD(&dev->sio_full);
1169 for (i = 0; i < dev->n_sbufs; i++) {
1170 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1171 dev->sio_bufs[i].v4lbuf.flags = 0;
1172 }
1173 spin_unlock_irqrestore(&dev->spinlock, flags);
1174 return 0;
1175 }
1176
1177
1178 static int stk_vidioc_g_parm(struct file *filp,
1179 void *priv, struct v4l2_streamparm *sp)
1180 {
1181 /*FIXME This is not correct */
1182 sp->parm.capture.timeperframe.numerator = 1;
1183 sp->parm.capture.timeperframe.denominator = 30;
1184 sp->parm.capture.readbuffers = 2;
1185 return 0;
1186 }
1187
1188 static int stk_vidioc_enum_framesizes(struct file *filp,
1189 void *priv, struct v4l2_frmsizeenum *frms)
1190 {
1191 if (frms->index >= ARRAY_SIZE(stk_sizes))
1192 return -EINVAL;
1193 switch (frms->pixel_format) {
1194 case V4L2_PIX_FMT_RGB565:
1195 case V4L2_PIX_FMT_RGB565X:
1196 case V4L2_PIX_FMT_UYVY:
1197 case V4L2_PIX_FMT_YUYV:
1198 case V4L2_PIX_FMT_SBGGR8:
1199 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1200 frms->discrete.width = stk_sizes[frms->index].w;
1201 frms->discrete.height = stk_sizes[frms->index].h;
1202 return 0;
1203 default: return -EINVAL;
1204 }
1205 }
1206
1207 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1208 .s_ctrl = stk_s_ctrl,
1209 };
1210
1211 static struct v4l2_file_operations v4l_stk_fops = {
1212 .owner = THIS_MODULE,
1213 .open = v4l_stk_open,
1214 .release = v4l_stk_release,
1215 .read = v4l_stk_read,
1216 .poll = v4l_stk_poll,
1217 .mmap = v4l_stk_mmap,
1218 .unlocked_ioctl = video_ioctl2,
1219 };
1220
1221 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1222 .vidioc_querycap = stk_vidioc_querycap,
1223 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1224 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1225 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1226 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1227 .vidioc_enum_input = stk_vidioc_enum_input,
1228 .vidioc_s_input = stk_vidioc_s_input,
1229 .vidioc_g_input = stk_vidioc_g_input,
1230 .vidioc_reqbufs = stk_vidioc_reqbufs,
1231 .vidioc_querybuf = stk_vidioc_querybuf,
1232 .vidioc_qbuf = stk_vidioc_qbuf,
1233 .vidioc_dqbuf = stk_vidioc_dqbuf,
1234 .vidioc_streamon = stk_vidioc_streamon,
1235 .vidioc_streamoff = stk_vidioc_streamoff,
1236 .vidioc_g_parm = stk_vidioc_g_parm,
1237 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1238 .vidioc_log_status = v4l2_ctrl_log_status,
1239 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1240 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1241 };
1242
1243 static void stk_v4l_dev_release(struct video_device *vd)
1244 {
1245 struct stk_camera *dev = vdev_to_camera(vd);
1246
1247 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1248 STK_ERROR("We are leaking memory\n");
1249 usb_put_intf(dev->interface);
1250 kfree(dev);
1251 }
1252
1253 static struct video_device stk_v4l_data = {
1254 .name = "stkwebcam",
1255 .fops = &v4l_stk_fops,
1256 .ioctl_ops = &v4l_stk_ioctl_ops,
1257 .release = stk_v4l_dev_release,
1258 };
1259
1260
1261 static int stk_register_video_device(struct stk_camera *dev)
1262 {
1263 int err;
1264
1265 dev->vdev = stk_v4l_data;
1266 dev->vdev.lock = &dev->lock;
1267 dev->vdev.debug = debug;
1268 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1269 set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
1270 video_set_drvdata(&dev->vdev, dev);
1271 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1272 if (err)
1273 STK_ERROR("v4l registration failed\n");
1274 else
1275 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1276 video_device_node_name(&dev->vdev));
1277 return err;
1278 }
1279
1280
1281 /* USB Stuff */
1282
1283 static int stk_camera_probe(struct usb_interface *interface,
1284 const struct usb_device_id *id)
1285 {
1286 struct v4l2_ctrl_handler *hdl;
1287 int err = 0;
1288 int i;
1289
1290 struct stk_camera *dev = NULL;
1291 struct usb_device *udev = interface_to_usbdev(interface);
1292 struct usb_host_interface *iface_desc;
1293 struct usb_endpoint_descriptor *endpoint;
1294
1295 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1296 if (dev == NULL) {
1297 STK_ERROR("Out of memory !\n");
1298 return -ENOMEM;
1299 }
1300 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1301 if (err < 0) {
1302 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1303 kfree(dev);
1304 return err;
1305 }
1306 hdl = &dev->hdl;
1307 v4l2_ctrl_handler_init(hdl, 3);
1308 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1309 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1310 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1311 V4L2_CID_HFLIP, 0, 1, 1, 1);
1312 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1313 V4L2_CID_VFLIP, 0, 1, 1, 1);
1314 if (hdl->error) {
1315 err = hdl->error;
1316 dev_err(&udev->dev, "couldn't register control\n");
1317 goto error;
1318 }
1319 dev->v4l2_dev.ctrl_handler = hdl;
1320
1321 spin_lock_init(&dev->spinlock);
1322 mutex_init(&dev->lock);
1323 init_waitqueue_head(&dev->wait_frame);
1324 dev->first_init = 1; /* webcam LED management */
1325
1326 dev->udev = udev;
1327 dev->interface = interface;
1328 usb_get_intf(interface);
1329
1330 if (hflip != -1)
1331 dev->vsettings.hflip = hflip;
1332 else if (dmi_check_system(stk_upside_down_dmi_table))
1333 dev->vsettings.hflip = 1;
1334 else
1335 dev->vsettings.hflip = 0;
1336 if (vflip != -1)
1337 dev->vsettings.vflip = vflip;
1338 else if (dmi_check_system(stk_upside_down_dmi_table))
1339 dev->vsettings.vflip = 1;
1340 else
1341 dev->vsettings.vflip = 0;
1342 dev->n_sbufs = 0;
1343 set_present(dev);
1344
1345 /* Set up the endpoint information
1346 * use only the first isoc-in endpoint
1347 * for the current alternate setting */
1348 iface_desc = interface->cur_altsetting;
1349
1350 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1351 endpoint = &iface_desc->endpoint[i].desc;
1352
1353 if (!dev->isoc_ep
1354 && usb_endpoint_is_isoc_in(endpoint)) {
1355 /* we found an isoc in endpoint */
1356 dev->isoc_ep = usb_endpoint_num(endpoint);
1357 break;
1358 }
1359 }
1360 if (!dev->isoc_ep) {
1361 STK_ERROR("Could not find isoc-in endpoint");
1362 err = -ENODEV;
1363 goto error;
1364 }
1365 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1366 dev->vsettings.mode = MODE_VGA;
1367 dev->frame_size = 640 * 480 * 2;
1368
1369 INIT_LIST_HEAD(&dev->sio_avail);
1370 INIT_LIST_HEAD(&dev->sio_full);
1371
1372 usb_set_intfdata(interface, dev);
1373
1374 err = stk_register_video_device(dev);
1375 if (err)
1376 goto error;
1377
1378 return 0;
1379
1380 error:
1381 v4l2_ctrl_handler_free(hdl);
1382 v4l2_device_unregister(&dev->v4l2_dev);
1383 kfree(dev);
1384 return err;
1385 }
1386
1387 static void stk_camera_disconnect(struct usb_interface *interface)
1388 {
1389 struct stk_camera *dev = usb_get_intfdata(interface);
1390
1391 usb_set_intfdata(interface, NULL);
1392 unset_present(dev);
1393
1394 wake_up_interruptible(&dev->wait_frame);
1395
1396 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1397 video_device_node_name(&dev->vdev));
1398
1399 video_unregister_device(&dev->vdev);
1400 v4l2_ctrl_handler_free(&dev->hdl);
1401 v4l2_device_unregister(&dev->v4l2_dev);
1402 }
1403
1404 #ifdef CONFIG_PM
1405 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1406 {
1407 struct stk_camera *dev = usb_get_intfdata(intf);
1408 if (is_streaming(dev)) {
1409 stk_stop_stream(dev);
1410 /* yes, this is ugly */
1411 set_streaming(dev);
1412 }
1413 return 0;
1414 }
1415
1416 static int stk_camera_resume(struct usb_interface *intf)
1417 {
1418 struct stk_camera *dev = usb_get_intfdata(intf);
1419 if (!is_initialised(dev))
1420 return 0;
1421 unset_initialised(dev);
1422 stk_initialise(dev);
1423 stk_camera_write_reg(dev, 0x0, 0x49);
1424 stk_setup_format(dev);
1425 if (is_streaming(dev))
1426 stk_start_stream(dev);
1427 return 0;
1428 }
1429 #endif
1430
1431 static struct usb_driver stk_camera_driver = {
1432 .name = "stkwebcam",
1433 .probe = stk_camera_probe,
1434 .disconnect = stk_camera_disconnect,
1435 .id_table = stkwebcam_table,
1436 #ifdef CONFIG_PM
1437 .suspend = stk_camera_suspend,
1438 .resume = stk_camera_resume,
1439 #endif
1440 };
1441
1442 module_usb_driver(stk_camera_driver);
Linux with added FPC-III support