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 */
stk_camera_write_reg(struct stk_camera * dev,u16 index,u8 value)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
stk_camera_read_reg(struct stk_camera * dev,u16 index,int * value)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
stk_start_stream(struct stk_camera * dev)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
stk_stop_stream(struct stk_camera * dev)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
stk_initialise(struct stk_camera * dev)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 */
stk_isoc_handler(struct urb * urb)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
stk_prepare_iso(struct stk_camera * dev)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
stk_clean_iso(struct stk_camera * dev)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
stk_setup_siobuf(struct stk_camera * dev,int index)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
stk_free_sio_buffers(struct stk_camera * dev)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 vfree(dev->sio_bufs[i].buffer);
561 kfree(dev->sio_bufs);
562 dev->sio_bufs = NULL;
563 return 0;
564 }
565
stk_prepare_sio_buffers(struct stk_camera * dev,unsigned n_sbufs)566 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
567 {
568 int i;
569 if (dev->sio_bufs != NULL)
570 STK_ERROR("sio_bufs already allocated\n");
571 else {
572 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
573 GFP_KERNEL);
574 if (dev->sio_bufs == NULL)
575 return -ENOMEM;
576 for (i = 0; i < n_sbufs; i++) {
577 if (stk_setup_siobuf(dev, i))
578 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
579 dev->n_sbufs = i+1;
580 }
581 }
582 return 0;
583 }
584
stk_allocate_buffers(struct stk_camera * dev,unsigned n_sbufs)585 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
586 {
587 int err;
588 err = stk_prepare_iso(dev);
589 if (err) {
590 stk_clean_iso(dev);
591 return err;
592 }
593 err = stk_prepare_sio_buffers(dev, n_sbufs);
594 if (err) {
595 stk_free_sio_buffers(dev);
596 return err;
597 }
598 return 0;
599 }
600
stk_free_buffers(struct stk_camera * dev)601 static void stk_free_buffers(struct stk_camera *dev)
602 {
603 stk_clean_iso(dev);
604 stk_free_sio_buffers(dev);
605 }
606 /* -------------------------------------------- */
607
608 /* v4l file operations */
609
v4l_stk_open(struct file * fp)610 static int v4l_stk_open(struct file *fp)
611 {
612 struct stk_camera *dev = video_drvdata(fp);
613 int err;
614
615 if (dev == NULL || !is_present(dev))
616 return -ENXIO;
617
618 if (mutex_lock_interruptible(&dev->lock))
619 return -ERESTARTSYS;
620 if (!dev->first_init)
621 stk_camera_write_reg(dev, 0x0, 0x24);
622 else
623 dev->first_init = 0;
624
625 err = v4l2_fh_open(fp);
626 if (!err)
627 usb_autopm_get_interface(dev->interface);
628 mutex_unlock(&dev->lock);
629 return err;
630 }
631
v4l_stk_release(struct file * fp)632 static int v4l_stk_release(struct file *fp)
633 {
634 struct stk_camera *dev = video_drvdata(fp);
635
636 mutex_lock(&dev->lock);
637 if (dev->owner == fp) {
638 stk_stop_stream(dev);
639 stk_free_buffers(dev);
640 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
641 unset_initialised(dev);
642 dev->owner = NULL;
643 }
644
645 if (is_present(dev))
646 usb_autopm_put_interface(dev->interface);
647 mutex_unlock(&dev->lock);
648 return v4l2_fh_release(fp);
649 }
650
stk_read(struct file * fp,char __user * buf,size_t count,loff_t * f_pos)651 static ssize_t stk_read(struct file *fp, char __user *buf,
652 size_t count, loff_t *f_pos)
653 {
654 int i;
655 int ret;
656 unsigned long flags;
657 struct stk_sio_buffer *sbuf;
658 struct stk_camera *dev = video_drvdata(fp);
659
660 if (!is_present(dev))
661 return -EIO;
662 if (dev->owner && (!dev->reading || dev->owner != fp))
663 return -EBUSY;
664 dev->owner = fp;
665 if (!is_streaming(dev)) {
666 if (stk_initialise(dev)
667 || stk_allocate_buffers(dev, 3)
668 || stk_start_stream(dev))
669 return -ENOMEM;
670 dev->reading = 1;
671 spin_lock_irqsave(&dev->spinlock, flags);
672 for (i = 0; i < dev->n_sbufs; i++) {
673 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
674 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
675 }
676 spin_unlock_irqrestore(&dev->spinlock, flags);
677 }
678 if (*f_pos == 0) {
679 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
680 return -EWOULDBLOCK;
681 ret = wait_event_interruptible(dev->wait_frame,
682 !list_empty(&dev->sio_full) || !is_present(dev));
683 if (ret)
684 return ret;
685 if (!is_present(dev))
686 return -EIO;
687 }
688 if (count + *f_pos > dev->frame_size)
689 count = dev->frame_size - *f_pos;
690 spin_lock_irqsave(&dev->spinlock, flags);
691 if (list_empty(&dev->sio_full)) {
692 spin_unlock_irqrestore(&dev->spinlock, flags);
693 STK_ERROR("BUG: No siobufs ready\n");
694 return 0;
695 }
696 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
697 spin_unlock_irqrestore(&dev->spinlock, flags);
698
699 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
700 return -EFAULT;
701
702 *f_pos += count;
703
704 if (*f_pos >= dev->frame_size) {
705 *f_pos = 0;
706 spin_lock_irqsave(&dev->spinlock, flags);
707 list_move_tail(&sbuf->list, &dev->sio_avail);
708 spin_unlock_irqrestore(&dev->spinlock, flags);
709 }
710 return count;
711 }
712
v4l_stk_read(struct file * fp,char __user * buf,size_t count,loff_t * f_pos)713 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
714 size_t count, loff_t *f_pos)
715 {
716 struct stk_camera *dev = video_drvdata(fp);
717 int ret;
718
719 if (mutex_lock_interruptible(&dev->lock))
720 return -ERESTARTSYS;
721 ret = stk_read(fp, buf, count, f_pos);
722 mutex_unlock(&dev->lock);
723 return ret;
724 }
725
v4l_stk_poll(struct file * fp,poll_table * wait)726 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
727 {
728 struct stk_camera *dev = video_drvdata(fp);
729 unsigned res = v4l2_ctrl_poll(fp, wait);
730
731 poll_wait(fp, &dev->wait_frame, wait);
732
733 if (!is_present(dev))
734 return POLLERR;
735
736 if (!list_empty(&dev->sio_full))
737 return res | POLLIN | POLLRDNORM;
738
739 return res;
740 }
741
742
stk_v4l_vm_open(struct vm_area_struct * vma)743 static void stk_v4l_vm_open(struct vm_area_struct *vma)
744 {
745 struct stk_sio_buffer *sbuf = vma->vm_private_data;
746 sbuf->mapcount++;
747 }
stk_v4l_vm_close(struct vm_area_struct * vma)748 static void stk_v4l_vm_close(struct vm_area_struct *vma)
749 {
750 struct stk_sio_buffer *sbuf = vma->vm_private_data;
751 sbuf->mapcount--;
752 if (sbuf->mapcount == 0)
753 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
754 }
755 static const struct vm_operations_struct stk_v4l_vm_ops = {
756 .open = stk_v4l_vm_open,
757 .close = stk_v4l_vm_close
758 };
759
v4l_stk_mmap(struct file * fp,struct vm_area_struct * vma)760 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
761 {
762 unsigned int i;
763 int ret;
764 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
765 struct stk_camera *dev = video_drvdata(fp);
766 struct stk_sio_buffer *sbuf = NULL;
767
768 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
769 return -EINVAL;
770
771 for (i = 0; i < dev->n_sbufs; i++) {
772 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
773 sbuf = dev->sio_bufs + i;
774 break;
775 }
776 }
777 if (sbuf == NULL)
778 return -EINVAL;
779 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
780 if (ret)
781 return ret;
782 vma->vm_flags |= VM_DONTEXPAND;
783 vma->vm_private_data = sbuf;
784 vma->vm_ops = &stk_v4l_vm_ops;
785 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
786 stk_v4l_vm_open(vma);
787 return 0;
788 }
789
790 /* v4l ioctl handlers */
791
stk_vidioc_querycap(struct file * filp,void * priv,struct v4l2_capability * cap)792 static int stk_vidioc_querycap(struct file *filp,
793 void *priv, struct v4l2_capability *cap)
794 {
795 struct stk_camera *dev = video_drvdata(filp);
796
797 strcpy(cap->driver, "stk");
798 strcpy(cap->card, "stk");
799 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
800
801 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
802 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
803 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
804 return 0;
805 }
806
stk_vidioc_enum_input(struct file * filp,void * priv,struct v4l2_input * input)807 static int stk_vidioc_enum_input(struct file *filp,
808 void *priv, struct v4l2_input *input)
809 {
810 if (input->index != 0)
811 return -EINVAL;
812
813 strcpy(input->name, "Syntek USB Camera");
814 input->type = V4L2_INPUT_TYPE_CAMERA;
815 return 0;
816 }
817
818
stk_vidioc_g_input(struct file * filp,void * priv,unsigned int * i)819 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
820 {
821 *i = 0;
822 return 0;
823 }
824
stk_vidioc_s_input(struct file * filp,void * priv,unsigned int i)825 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
826 {
827 return i ? -EINVAL : 0;
828 }
829
stk_s_ctrl(struct v4l2_ctrl * ctrl)830 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
831 {
832 struct stk_camera *dev =
833 container_of(ctrl->handler, struct stk_camera, hdl);
834
835 switch (ctrl->id) {
836 case V4L2_CID_BRIGHTNESS:
837 return stk_sensor_set_brightness(dev, ctrl->val);
838 case V4L2_CID_HFLIP:
839 if (dmi_check_system(stk_upside_down_dmi_table))
840 dev->vsettings.hflip = !ctrl->val;
841 else
842 dev->vsettings.hflip = ctrl->val;
843 return 0;
844 case V4L2_CID_VFLIP:
845 if (dmi_check_system(stk_upside_down_dmi_table))
846 dev->vsettings.vflip = !ctrl->val;
847 else
848 dev->vsettings.vflip = ctrl->val;
849 return 0;
850 default:
851 return -EINVAL;
852 }
853 return 0;
854 }
855
856
stk_vidioc_enum_fmt_vid_cap(struct file * filp,void * priv,struct v4l2_fmtdesc * fmtd)857 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
858 void *priv, struct v4l2_fmtdesc *fmtd)
859 {
860 switch (fmtd->index) {
861 case 0:
862 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
863 strcpy(fmtd->description, "r5g6b5");
864 break;
865 case 1:
866 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
867 strcpy(fmtd->description, "r5g6b5BE");
868 break;
869 case 2:
870 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
871 strcpy(fmtd->description, "yuv4:2:2");
872 break;
873 case 3:
874 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
875 strcpy(fmtd->description, "Raw bayer");
876 break;
877 case 4:
878 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
879 strcpy(fmtd->description, "yuv4:2:2");
880 break;
881 default:
882 return -EINVAL;
883 }
884 return 0;
885 }
886
887 static struct stk_size {
888 unsigned w;
889 unsigned h;
890 enum stk_mode m;
891 } stk_sizes[] = {
892 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
893 { .w = 640, .h = 480, .m = MODE_VGA, },
894 { .w = 352, .h = 288, .m = MODE_CIF, },
895 { .w = 320, .h = 240, .m = MODE_QVGA, },
896 { .w = 176, .h = 144, .m = MODE_QCIF, },
897 };
898
stk_vidioc_g_fmt_vid_cap(struct file * filp,void * priv,struct v4l2_format * f)899 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
900 void *priv, struct v4l2_format *f)
901 {
902 struct v4l2_pix_format *pix_format = &f->fmt.pix;
903 struct stk_camera *dev = video_drvdata(filp);
904 int i;
905
906 for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
907 stk_sizes[i].m != dev->vsettings.mode; i++)
908 ;
909 if (i == ARRAY_SIZE(stk_sizes)) {
910 STK_ERROR("ERROR: mode invalid\n");
911 return -EINVAL;
912 }
913 pix_format->width = stk_sizes[i].w;
914 pix_format->height = stk_sizes[i].h;
915 pix_format->field = V4L2_FIELD_NONE;
916 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
917 pix_format->pixelformat = dev->vsettings.palette;
918 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
919 pix_format->bytesperline = pix_format->width;
920 else
921 pix_format->bytesperline = 2 * pix_format->width;
922 pix_format->sizeimage = pix_format->bytesperline
923 * pix_format->height;
924 return 0;
925 }
926
stk_try_fmt_vid_cap(struct file * filp,struct v4l2_format * fmtd,int * idx)927 static int stk_try_fmt_vid_cap(struct file *filp,
928 struct v4l2_format *fmtd, int *idx)
929 {
930 int i;
931 switch (fmtd->fmt.pix.pixelformat) {
932 case V4L2_PIX_FMT_RGB565:
933 case V4L2_PIX_FMT_RGB565X:
934 case V4L2_PIX_FMT_UYVY:
935 case V4L2_PIX_FMT_YUYV:
936 case V4L2_PIX_FMT_SBGGR8:
937 break;
938 default:
939 return -EINVAL;
940 }
941 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
942 if (fmtd->fmt.pix.width > stk_sizes[i].w)
943 break;
944 }
945 if (i == ARRAY_SIZE(stk_sizes)
946 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
947 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
948 fmtd->fmt.pix.height = stk_sizes[i-1].h;
949 fmtd->fmt.pix.width = stk_sizes[i-1].w;
950 if (idx)
951 *idx = i - 1;
952 } else {
953 fmtd->fmt.pix.height = stk_sizes[i].h;
954 fmtd->fmt.pix.width = stk_sizes[i].w;
955 if (idx)
956 *idx = i;
957 }
958
959 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
960 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
961 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
962 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
963 else
964 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
965 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
966 * fmtd->fmt.pix.height;
967 return 0;
968 }
969
stk_vidioc_try_fmt_vid_cap(struct file * filp,void * priv,struct v4l2_format * fmtd)970 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
971 void *priv, struct v4l2_format *fmtd)
972 {
973 return stk_try_fmt_vid_cap(filp, fmtd, NULL);
974 }
975
stk_setup_format(struct stk_camera * dev)976 static int stk_setup_format(struct stk_camera *dev)
977 {
978 int i = 0;
979 int depth;
980 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
981 depth = 1;
982 else
983 depth = 2;
984 while (i < ARRAY_SIZE(stk_sizes) &&
985 stk_sizes[i].m != dev->vsettings.mode)
986 i++;
987 if (i == ARRAY_SIZE(stk_sizes)) {
988 STK_ERROR("Something is broken in %s\n", __func__);
989 return -EFAULT;
990 }
991 /* This registers controls some timings, not sure of what. */
992 stk_camera_write_reg(dev, 0x001b, 0x0e);
993 if (dev->vsettings.mode == MODE_SXGA)
994 stk_camera_write_reg(dev, 0x001c, 0x0e);
995 else
996 stk_camera_write_reg(dev, 0x001c, 0x46);
997 /*
998 * Registers 0x0115 0x0114 are the size of each line (bytes),
999 * regs 0x0117 0x0116 are the heigth of the image.
1000 */
1001 stk_camera_write_reg(dev, 0x0115,
1002 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1003 stk_camera_write_reg(dev, 0x0114,
1004 (stk_sizes[i].w * depth) & 0xff);
1005 stk_camera_write_reg(dev, 0x0117,
1006 (stk_sizes[i].h >> 8) & 0xff);
1007 stk_camera_write_reg(dev, 0x0116,
1008 stk_sizes[i].h & 0xff);
1009 return stk_sensor_configure(dev);
1010 }
1011
stk_vidioc_s_fmt_vid_cap(struct file * filp,void * priv,struct v4l2_format * fmtd)1012 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1013 void *priv, struct v4l2_format *fmtd)
1014 {
1015 int ret;
1016 int idx;
1017 struct stk_camera *dev = video_drvdata(filp);
1018
1019 if (dev == NULL)
1020 return -ENODEV;
1021 if (!is_present(dev))
1022 return -ENODEV;
1023 if (is_streaming(dev))
1024 return -EBUSY;
1025 if (dev->owner)
1026 return -EBUSY;
1027 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1028 if (ret)
1029 return ret;
1030
1031 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1032 stk_free_buffers(dev);
1033 dev->frame_size = fmtd->fmt.pix.sizeimage;
1034 dev->vsettings.mode = stk_sizes[idx].m;
1035
1036 stk_initialise(dev);
1037 return stk_setup_format(dev);
1038 }
1039
stk_vidioc_reqbufs(struct file * filp,void * priv,struct v4l2_requestbuffers * rb)1040 static int stk_vidioc_reqbufs(struct file *filp,
1041 void *priv, struct v4l2_requestbuffers *rb)
1042 {
1043 struct stk_camera *dev = video_drvdata(filp);
1044
1045 if (dev == NULL)
1046 return -ENODEV;
1047 if (rb->memory != V4L2_MEMORY_MMAP)
1048 return -EINVAL;
1049 if (is_streaming(dev)
1050 || (dev->owner && dev->owner != filp))
1051 return -EBUSY;
1052 stk_free_buffers(dev);
1053 if (rb->count == 0) {
1054 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1055 unset_initialised(dev);
1056 dev->owner = NULL;
1057 return 0;
1058 }
1059 dev->owner = filp;
1060
1061 /*FIXME If they ask for zero, we must stop streaming and free */
1062 if (rb->count < 3)
1063 rb->count = 3;
1064 /* Arbitrary limit */
1065 else if (rb->count > 5)
1066 rb->count = 5;
1067
1068 stk_allocate_buffers(dev, rb->count);
1069 rb->count = dev->n_sbufs;
1070 return 0;
1071 }
1072
stk_vidioc_querybuf(struct file * filp,void * priv,struct v4l2_buffer * buf)1073 static int stk_vidioc_querybuf(struct file *filp,
1074 void *priv, struct v4l2_buffer *buf)
1075 {
1076 struct stk_camera *dev = video_drvdata(filp);
1077 struct stk_sio_buffer *sbuf;
1078
1079 if (buf->index >= dev->n_sbufs)
1080 return -EINVAL;
1081 sbuf = dev->sio_bufs + buf->index;
1082 *buf = sbuf->v4lbuf;
1083 return 0;
1084 }
1085
stk_vidioc_qbuf(struct file * filp,void * priv,struct v4l2_buffer * buf)1086 static int stk_vidioc_qbuf(struct file *filp,
1087 void *priv, struct v4l2_buffer *buf)
1088 {
1089 struct stk_camera *dev = video_drvdata(filp);
1090 struct stk_sio_buffer *sbuf;
1091 unsigned long flags;
1092
1093 if (buf->memory != V4L2_MEMORY_MMAP)
1094 return -EINVAL;
1095
1096 if (buf->index >= dev->n_sbufs)
1097 return -EINVAL;
1098 sbuf = dev->sio_bufs + buf->index;
1099 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1100 return 0;
1101 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1102 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1103 spin_lock_irqsave(&dev->spinlock, flags);
1104 list_add_tail(&sbuf->list, &dev->sio_avail);
1105 *buf = sbuf->v4lbuf;
1106 spin_unlock_irqrestore(&dev->spinlock, flags);
1107 return 0;
1108 }
1109
stk_vidioc_dqbuf(struct file * filp,void * priv,struct v4l2_buffer * buf)1110 static int stk_vidioc_dqbuf(struct file *filp,
1111 void *priv, struct v4l2_buffer *buf)
1112 {
1113 struct stk_camera *dev = video_drvdata(filp);
1114 struct stk_sio_buffer *sbuf;
1115 unsigned long flags;
1116 int ret;
1117
1118 if (!is_streaming(dev))
1119 return -EINVAL;
1120
1121 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1122 return -EWOULDBLOCK;
1123 ret = wait_event_interruptible(dev->wait_frame,
1124 !list_empty(&dev->sio_full) || !is_present(dev));
1125 if (ret)
1126 return ret;
1127 if (!is_present(dev))
1128 return -EIO;
1129
1130 spin_lock_irqsave(&dev->spinlock, flags);
1131 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1132 list_del_init(&sbuf->list);
1133 spin_unlock_irqrestore(&dev->spinlock, flags);
1134 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1135 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1136 sbuf->v4lbuf.sequence = ++dev->sequence;
1137 v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1138
1139 *buf = sbuf->v4lbuf;
1140 return 0;
1141 }
1142
stk_vidioc_streamon(struct file * filp,void * priv,enum v4l2_buf_type type)1143 static int stk_vidioc_streamon(struct file *filp,
1144 void *priv, enum v4l2_buf_type type)
1145 {
1146 struct stk_camera *dev = video_drvdata(filp);
1147 if (is_streaming(dev))
1148 return 0;
1149 if (dev->sio_bufs == NULL)
1150 return -EINVAL;
1151 dev->sequence = 0;
1152 return stk_start_stream(dev);
1153 }
1154
stk_vidioc_streamoff(struct file * filp,void * priv,enum v4l2_buf_type type)1155 static int stk_vidioc_streamoff(struct file *filp,
1156 void *priv, enum v4l2_buf_type type)
1157 {
1158 struct stk_camera *dev = video_drvdata(filp);
1159 unsigned long flags;
1160 int i;
1161 stk_stop_stream(dev);
1162 spin_lock_irqsave(&dev->spinlock, flags);
1163 INIT_LIST_HEAD(&dev->sio_avail);
1164 INIT_LIST_HEAD(&dev->sio_full);
1165 for (i = 0; i < dev->n_sbufs; i++) {
1166 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1167 dev->sio_bufs[i].v4lbuf.flags = 0;
1168 }
1169 spin_unlock_irqrestore(&dev->spinlock, flags);
1170 return 0;
1171 }
1172
1173
stk_vidioc_g_parm(struct file * filp,void * priv,struct v4l2_streamparm * sp)1174 static int stk_vidioc_g_parm(struct file *filp,
1175 void *priv, struct v4l2_streamparm *sp)
1176 {
1177 /*FIXME This is not correct */
1178 sp->parm.capture.timeperframe.numerator = 1;
1179 sp->parm.capture.timeperframe.denominator = 30;
1180 sp->parm.capture.readbuffers = 2;
1181 return 0;
1182 }
1183
stk_vidioc_enum_framesizes(struct file * filp,void * priv,struct v4l2_frmsizeenum * frms)1184 static int stk_vidioc_enum_framesizes(struct file *filp,
1185 void *priv, struct v4l2_frmsizeenum *frms)
1186 {
1187 if (frms->index >= ARRAY_SIZE(stk_sizes))
1188 return -EINVAL;
1189 switch (frms->pixel_format) {
1190 case V4L2_PIX_FMT_RGB565:
1191 case V4L2_PIX_FMT_RGB565X:
1192 case V4L2_PIX_FMT_UYVY:
1193 case V4L2_PIX_FMT_YUYV:
1194 case V4L2_PIX_FMT_SBGGR8:
1195 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1196 frms->discrete.width = stk_sizes[frms->index].w;
1197 frms->discrete.height = stk_sizes[frms->index].h;
1198 return 0;
1199 default: return -EINVAL;
1200 }
1201 }
1202
1203 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1204 .s_ctrl = stk_s_ctrl,
1205 };
1206
1207 static struct v4l2_file_operations v4l_stk_fops = {
1208 .owner = THIS_MODULE,
1209 .open = v4l_stk_open,
1210 .release = v4l_stk_release,
1211 .read = v4l_stk_read,
1212 .poll = v4l_stk_poll,
1213 .mmap = v4l_stk_mmap,
1214 .unlocked_ioctl = video_ioctl2,
1215 };
1216
1217 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1218 .vidioc_querycap = stk_vidioc_querycap,
1219 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1220 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1221 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1222 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1223 .vidioc_enum_input = stk_vidioc_enum_input,
1224 .vidioc_s_input = stk_vidioc_s_input,
1225 .vidioc_g_input = stk_vidioc_g_input,
1226 .vidioc_reqbufs = stk_vidioc_reqbufs,
1227 .vidioc_querybuf = stk_vidioc_querybuf,
1228 .vidioc_qbuf = stk_vidioc_qbuf,
1229 .vidioc_dqbuf = stk_vidioc_dqbuf,
1230 .vidioc_streamon = stk_vidioc_streamon,
1231 .vidioc_streamoff = stk_vidioc_streamoff,
1232 .vidioc_g_parm = stk_vidioc_g_parm,
1233 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1234 .vidioc_log_status = v4l2_ctrl_log_status,
1235 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1236 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1237 };
1238
stk_v4l_dev_release(struct video_device * vd)1239 static void stk_v4l_dev_release(struct video_device *vd)
1240 {
1241 struct stk_camera *dev = vdev_to_camera(vd);
1242
1243 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1244 STK_ERROR("We are leaking memory\n");
1245 usb_put_intf(dev->interface);
1246 kfree(dev);
1247 }
1248
1249 static struct video_device stk_v4l_data = {
1250 .name = "stkwebcam",
1251 .fops = &v4l_stk_fops,
1252 .ioctl_ops = &v4l_stk_ioctl_ops,
1253 .release = stk_v4l_dev_release,
1254 };
1255
1256
stk_register_video_device(struct stk_camera * dev)1257 static int stk_register_video_device(struct stk_camera *dev)
1258 {
1259 int err;
1260
1261 dev->vdev = stk_v4l_data;
1262 dev->vdev.lock = &dev->lock;
1263 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1264 video_set_drvdata(&dev->vdev, dev);
1265 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1266 if (err)
1267 STK_ERROR("v4l registration failed\n");
1268 else
1269 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1270 video_device_node_name(&dev->vdev));
1271 return err;
1272 }
1273
1274
1275 /* USB Stuff */
1276
stk_camera_probe(struct usb_interface * interface,const struct usb_device_id * id)1277 static int stk_camera_probe(struct usb_interface *interface,
1278 const struct usb_device_id *id)
1279 {
1280 struct v4l2_ctrl_handler *hdl;
1281 int err = 0;
1282 int i;
1283
1284 struct stk_camera *dev = NULL;
1285 struct usb_device *udev = interface_to_usbdev(interface);
1286 struct usb_host_interface *iface_desc;
1287 struct usb_endpoint_descriptor *endpoint;
1288
1289 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1290 if (dev == NULL) {
1291 STK_ERROR("Out of memory !\n");
1292 return -ENOMEM;
1293 }
1294 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1295 if (err < 0) {
1296 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1297 kfree(dev);
1298 return err;
1299 }
1300 hdl = &dev->hdl;
1301 v4l2_ctrl_handler_init(hdl, 3);
1302 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1303 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1304 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1305 V4L2_CID_HFLIP, 0, 1, 1, 1);
1306 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1307 V4L2_CID_VFLIP, 0, 1, 1, 1);
1308 if (hdl->error) {
1309 err = hdl->error;
1310 dev_err(&udev->dev, "couldn't register control\n");
1311 goto error;
1312 }
1313 dev->v4l2_dev.ctrl_handler = hdl;
1314
1315 spin_lock_init(&dev->spinlock);
1316 mutex_init(&dev->lock);
1317 init_waitqueue_head(&dev->wait_frame);
1318 dev->first_init = 1; /* webcam LED management */
1319
1320 dev->udev = udev;
1321 dev->interface = interface;
1322 usb_get_intf(interface);
1323
1324 if (hflip != -1)
1325 dev->vsettings.hflip = hflip;
1326 else if (dmi_check_system(stk_upside_down_dmi_table))
1327 dev->vsettings.hflip = 1;
1328 else
1329 dev->vsettings.hflip = 0;
1330 if (vflip != -1)
1331 dev->vsettings.vflip = vflip;
1332 else if (dmi_check_system(stk_upside_down_dmi_table))
1333 dev->vsettings.vflip = 1;
1334 else
1335 dev->vsettings.vflip = 0;
1336 dev->n_sbufs = 0;
1337 set_present(dev);
1338
1339 /* Set up the endpoint information
1340 * use only the first isoc-in endpoint
1341 * for the current alternate setting */
1342 iface_desc = interface->cur_altsetting;
1343
1344 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1345 endpoint = &iface_desc->endpoint[i].desc;
1346
1347 if (!dev->isoc_ep
1348 && usb_endpoint_is_isoc_in(endpoint)) {
1349 /* we found an isoc in endpoint */
1350 dev->isoc_ep = usb_endpoint_num(endpoint);
1351 break;
1352 }
1353 }
1354 if (!dev->isoc_ep) {
1355 STK_ERROR("Could not find isoc-in endpoint");
1356 err = -ENODEV;
1357 goto error;
1358 }
1359 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1360 dev->vsettings.mode = MODE_VGA;
1361 dev->frame_size = 640 * 480 * 2;
1362
1363 INIT_LIST_HEAD(&dev->sio_avail);
1364 INIT_LIST_HEAD(&dev->sio_full);
1365
1366 usb_set_intfdata(interface, dev);
1367
1368 err = stk_register_video_device(dev);
1369 if (err)
1370 goto error;
1371
1372 return 0;
1373
1374 error:
1375 v4l2_ctrl_handler_free(hdl);
1376 v4l2_device_unregister(&dev->v4l2_dev);
1377 kfree(dev);
1378 return err;
1379 }
1380
stk_camera_disconnect(struct usb_interface * interface)1381 static void stk_camera_disconnect(struct usb_interface *interface)
1382 {
1383 struct stk_camera *dev = usb_get_intfdata(interface);
1384
1385 usb_set_intfdata(interface, NULL);
1386 unset_present(dev);
1387
1388 wake_up_interruptible(&dev->wait_frame);
1389
1390 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1391 video_device_node_name(&dev->vdev));
1392
1393 video_unregister_device(&dev->vdev);
1394 v4l2_ctrl_handler_free(&dev->hdl);
1395 v4l2_device_unregister(&dev->v4l2_dev);
1396 }
1397
1398 #ifdef CONFIG_PM
stk_camera_suspend(struct usb_interface * intf,pm_message_t message)1399 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1400 {
1401 struct stk_camera *dev = usb_get_intfdata(intf);
1402 if (is_streaming(dev)) {
1403 stk_stop_stream(dev);
1404 /* yes, this is ugly */
1405 set_streaming(dev);
1406 }
1407 return 0;
1408 }
1409
stk_camera_resume(struct usb_interface * intf)1410 static int stk_camera_resume(struct usb_interface *intf)
1411 {
1412 struct stk_camera *dev = usb_get_intfdata(intf);
1413 if (!is_initialised(dev))
1414 return 0;
1415 unset_initialised(dev);
1416 stk_initialise(dev);
1417 stk_camera_write_reg(dev, 0x0, 0x49);
1418 stk_setup_format(dev);
1419 if (is_streaming(dev))
1420 stk_start_stream(dev);
1421 return 0;
1422 }
1423 #endif
1424
1425 static struct usb_driver stk_camera_driver = {
1426 .name = "stkwebcam",
1427 .probe = stk_camera_probe,
1428 .disconnect = stk_camera_disconnect,
1429 .id_table = stkwebcam_table,
1430 #ifdef CONFIG_PM
1431 .suspend = stk_camera_suspend,
1432 .resume = stk_camera_resume,
1433 #endif
1434 };
1435
1436 module_usb_driver(stk_camera_driver);
1437