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V4L/DVB (3099): Fixed device controls for em28xx on WinTV USB2 devices
[linux-2.6/suspend2-2.6.18.git] / drivers / media / video / em28xx / em28xx-video.c
blob446ba3b2ac3654d8a19c6f5a45dbe0096d83d804
1 /*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@brturbo.com.br>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include <linux/init.h>
25 #include <linux/list.h>
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/usb.h>
29 #include <linux/i2c.h>
30 #include <linux/version.h>
31 #include <linux/video_decoder.h>
32
33 #include "em28xx.h"
34 #include <media/tuner.h>
35 #include <media/v4l2-common.h>
36
37 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
38 "Markus Rechberger <mrechberger@gmail.com>, " \
39 "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
40 "Sascha Sommer <saschasommer@freenet.de>"
41
42 #define DRIVER_NAME "em28xx"
43 #define DRIVER_DESC "Empia em28xx based USB video device driver"
44 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1)
45
46 #define em28xx_videodbg(fmt, arg...) do {\
47 if (video_debug) \
48 printk(KERN_INFO "%s %s :"fmt, \
49 dev->name, __FUNCTION__ , ##arg); } while (0)
50
51 MODULE_AUTHOR(DRIVER_AUTHOR);
52 MODULE_DESCRIPTION(DRIVER_DESC);
53 MODULE_LICENSE("GPL");
54
55 static LIST_HEAD(em28xx_devlist);
56
57 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
58 module_param_array(card, int, NULL, 0444);
59 MODULE_PARM_DESC(card,"card type");
60
61 static int tuner = -1;
62 module_param(tuner, int, 0444);
63 MODULE_PARM_DESC(tuner, "tuner type");
64
65 static unsigned int video_debug = 0;
66 module_param(video_debug,int,0644);
67 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
68
69 /* supported tv norms */
70 static struct em28xx_tvnorm tvnorms[] = {
71 {
72 .name = "PAL",
73 .id = V4L2_STD_PAL,
74 .mode = VIDEO_MODE_PAL,
75 }, {
76 .name = "NTSC",
77 .id = V4L2_STD_NTSC,
78 .mode = VIDEO_MODE_NTSC,
79 }, {
80 .name = "SECAM",
81 .id = V4L2_STD_SECAM,
82 .mode = VIDEO_MODE_SECAM,
83 }, {
84 .name = "PAL-M",
85 .id = V4L2_STD_PAL_M,
86 .mode = VIDEO_MODE_PAL,
87 }
88 };
89
90 static const unsigned char saa7114_i2c_init[] = {
91 0x00,0x00,0x01,0x08,0x02,0xc4,0x03,0x30,0x04,0x90,0x05,0x90,0x06,0xeb,0x07,0xe0,
92 0x08,0x88,0x09,0x40,0x0a,0x80,0x0b,0x44,0x0c,0x40,0x0d,0x00,0x0e,0x81,0x0f,0x2a,
93 0x10,0x06,0x11,0x00,0x12,0xc8,0x13,0x80,0x14,0x00,0x15,0x11,0x16,0x01,0x17,0x42,
94 0x18,0x40,0x19,0x80,0x40,0x00,0x41,0xff,0x42,0xff,0x43,0xff,0x44,0xff,0x45,0xff,
95 0x46,0xff,0x47,0xff,0x48,0xff,0x49,0xff,0x4a,0xff,0x4b,0xff,0x4c,0xff,0x4d,0xff,
96 0x4e,0xff,0x4f,0xff,0x50,0xff,0x51,0xff,0x52,0xff,0x53,0xff,0x54,0x5f,0x55,0xff,
97 0x56,0xff,0x57,0xff,0x58,0x00,0x59,0x47,0x5a,0x03,0x5b,0x03,0x5d,0x3e,0x5e,0x00,
98 0x80,0x1c,0x83,0x01,0x84,0xa5,0x85,0x10,0x86,0x45,0x87,0x41,0x88,0xf0,0x88,0x00,
99 0x88,0xf0,0x90,0x00,0x91,0x08,0x92,0x00,0x93,0x80,0x94,0x08,0x95,0x00,0x96,0xc0,
100 0x97,0x02,0x98,0x13,0x99,0x00,0x9a,0x38,0x9b,0x01,0x9c,0x80,0x9d,0x02,0x9e,0x06,
101 0x9f,0x01,0xa0,0x01,0xa1,0x00,0xa2,0x00,0xa4,0x80,0xa5,0x36,0xa6,0x36,0xa8,0x67,
102 0xa9,0x04,0xaa,0x00,0xac,0x33,0xad,0x02,0xae,0x00,0xb0,0xcd,0xb1,0x04,0xb2,0xcd,
103 0xb3,0x04,0xb4,0x01,0xb8,0x00,0xb9,0x00,0xba,0x00,0xbb,0x00,0xbc,0x00,0xbd,0x00,
104 0xbe,0x00,0xbf,0x00
105 };
106
107 #define TVNORMS ARRAY_SIZE(tvnorms)
108
109 /* supported controls */
110 /* Common to all boards */
111 static struct v4l2_queryctrl em28xx_qctrl[] = {
112 {
113 .id = V4L2_CID_AUDIO_VOLUME,
114 .type = V4L2_CTRL_TYPE_INTEGER,
115 .name = "Volume",
116 .minimum = 0x0,
117 .maximum = 0x1f,
118 .step = 0x1,
119 .default_value = 0x1f,
120 .flags = 0,
121 },{
122 .id = V4L2_CID_AUDIO_MUTE,
123 .type = V4L2_CTRL_TYPE_BOOLEAN,
124 .name = "Mute",
125 .minimum = 0,
126 .maximum = 1,
127 .step = 1,
128 .default_value = 1,
129 .flags = 0,
130 }
131 };
132
133 /* FIXME: These are specific to saa711x - should be moved to its code */
134 static struct v4l2_queryctrl saa711x_qctrl[] = {
135 {
136 .id = V4L2_CID_BRIGHTNESS,
137 .type = V4L2_CTRL_TYPE_INTEGER,
138 .name = "Brightness",
139 .minimum = -128,
140 .maximum = 127,
141 .step = 1,
142 .default_value = 0,
143 .flags = 0,
144 },{
145 .id = V4L2_CID_CONTRAST,
146 .type = V4L2_CTRL_TYPE_INTEGER,
147 .name = "Contrast",
148 .minimum = 0x0,
149 .maximum = 0x1f,
150 .step = 0x1,
151 .default_value = 0x10,
152 .flags = 0,
153 },{
154 .id = V4L2_CID_SATURATION,
155 .type = V4L2_CTRL_TYPE_INTEGER,
156 .name = "Saturation",
157 .minimum = 0x0,
158 .maximum = 0x1f,
159 .step = 0x1,
160 .default_value = 0x10,
161 .flags = 0,
162 },{
163 .id = V4L2_CID_RED_BALANCE,
164 .type = V4L2_CTRL_TYPE_INTEGER,
165 .name = "Red chroma balance",
166 .minimum = -128,
167 .maximum = 127,
168 .step = 1,
169 .default_value = 0,
170 .flags = 0,
171 },{
172 .id = V4L2_CID_BLUE_BALANCE,
173 .type = V4L2_CTRL_TYPE_INTEGER,
174 .name = "Blue chroma balance",
175 .minimum = -128,
176 .maximum = 127,
177 .step = 1,
178 .default_value = 0,
179 .flags = 0,
180 },{
181 .id = V4L2_CID_GAMMA,
182 .type = V4L2_CTRL_TYPE_INTEGER,
183 .name = "Gamma",
184 .minimum = 0x0,
185 .maximum = 0x3f,
186 .step = 0x1,
187 .default_value = 0x20,
188 .flags = 0,
189 }
190 };
191
192 static struct usb_driver em28xx_usb_driver;
193
194 static DECLARE_MUTEX(em28xx_sysfs_lock);
195 static DECLARE_RWSEM(em28xx_disconnect);
196
197 /********************* v4l2 interface ******************************************/
198
199 /*
200 * em28xx_config()
201 * inits registers with sane defaults
202 */
203 static int em28xx_config(struct em28xx *dev)
204 {
205
206 /* Sets I2C speed to 100 KHz */
207 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
208
209 /* enable vbi capturing */
210 em28xx_audio_usb_mute(dev, 1);
211 dev->mute = 1; /* maybe not the right place... */
212 dev->volume = 0x1f;
213 em28xx_audio_analog_set(dev);
214 em28xx_audio_analog_setup(dev);
215 em28xx_outfmt_set_yuv422(dev);
216 em28xx_colorlevels_set_default(dev);
217 em28xx_compression_disable(dev);
218
219 return 0;
220 }
221
222 /*
223 * em28xx_config_i2c()
224 * configure i2c attached devices
225 */
226 static void em28xx_config_i2c(struct em28xx *dev)
227 {
228 struct v4l2_frequency f;
229 struct video_decoder_init em28xx_vdi = {.data = NULL };
230
231
232 /* configure decoder */
233 if(dev->model == EM2820_BOARD_MSI_VOX_USB_2){
234 em28xx_vdi.data=saa7114_i2c_init;
235 em28xx_vdi.len=sizeof(saa7114_i2c_init);
236 }
237
238
239 em28xx_i2c_call_clients(dev, DECODER_INIT, &em28xx_vdi);
240 em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
241 /* em28xx_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
242 /* em28xx_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
243 /* em28xx_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
244 /* em28xx_i2c_call_clients(dev,DECODER_DUMP, NULL); */
245
246 /* configure tuner */
247 f.tuner = 0;
248 f.type = V4L2_TUNER_ANALOG_TV;
249 f.frequency = 9076; /* FIXME:remove magic number */
250 dev->ctl_freq = f.frequency;
251 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
252
253 /* configure tda9887 */
254
255
256 /* em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
257 }
258
259 /*
260 * em28xx_empty_framequeues()
261 * prepare queues for incoming and outgoing frames
262 */
263 static void em28xx_empty_framequeues(struct em28xx *dev)
264 {
265 u32 i;
266
267 INIT_LIST_HEAD(&dev->inqueue);
268 INIT_LIST_HEAD(&dev->outqueue);
269
270 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
271 dev->frame[i].state = F_UNUSED;
272 dev->frame[i].buf.bytesused = 0;
273 }
274 }
275
276 static void video_mux(struct em28xx *dev, int index)
277 {
278 int input, ainput;
279
280 input = INPUT(index)->vmux;
281 dev->ctl_input = index;
282 dev->ctl_ainput = INPUT(index)->amux;
283
284 em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
285
286
287 em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
288
289 if (dev->has_msp34xx) {
290 em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
291 ainput = EM28XX_AUDIO_SRC_TUNER;
292 em28xx_audio_source(dev, ainput);
293 } else {
294 switch (dev->ctl_ainput) {
295 case 0:
296 ainput = EM28XX_AUDIO_SRC_TUNER;
297 break;
298 default:
299 ainput = EM28XX_AUDIO_SRC_LINE;
300 }
301 em28xx_audio_source(dev, ainput);
302 }
303 }
304
305 /*
306 * em28xx_v4l2_open()
307 * inits the device and starts isoc transfer
308 */
309 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
310 {
311 int minor = iminor(inode);
312 int errCode = 0;
313 struct em28xx *h,*dev = NULL;
314 struct list_head *list;
315
316 list_for_each(list,&em28xx_devlist) {
317 h = list_entry(list, struct em28xx, devlist);
318 if (h->vdev->minor == minor) {
319 dev = h;
320 }
321 }
322
323 filp->private_data=dev;
324
325
326 em28xx_videodbg("users=%d\n", dev->users);
327
328 if (!down_read_trylock(&em28xx_disconnect))
329 return -ERESTARTSYS;
330
331 if (dev->users) {
332 em28xx_warn("this driver can be opened only once\n");
333 up_read(&em28xx_disconnect);
334 return -EBUSY;
335 }
336
337 /* if(dev->vbi_dev->minor == minor){
338 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
339 }*/
340 if (dev->vdev->minor == minor) {
341 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
342 }
343
344 init_MUTEX(&dev->fileop_lock); /* to 1 == available */
345 spin_lock_init(&dev->queue_lock);
346 init_waitqueue_head(&dev->wait_frame);
347 init_waitqueue_head(&dev->wait_stream);
348
349 down(&dev->lock);
350
351 em28xx_set_alternate(dev);
352
353 dev->width = norm_maxw(dev);
354 dev->height = norm_maxh(dev);
355 dev->frame_size = dev->width * dev->height * 2;
356 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
357 dev->bytesperline = dev->width * 2;
358 dev->hscale = 0;
359 dev->vscale = 0;
360
361 em28xx_capture_start(dev, 1);
362 em28xx_resolution_set(dev);
363
364 /* start the transfer */
365 errCode = em28xx_init_isoc(dev);
366 if (errCode)
367 goto err;
368
369 dev->users++;
370 filp->private_data = dev;
371 dev->io = IO_NONE;
372 dev->stream = STREAM_OFF;
373 dev->num_frames = 0;
374
375 /* prepare queues */
376 em28xx_empty_framequeues(dev);
377
378 dev->state |= DEV_INITIALIZED;
379
380 video_mux(dev, 0);
381
382 err:
383 up(&dev->lock);
384 up_read(&em28xx_disconnect);
385 return errCode;
386 }
387
388 /*
389 * em28xx_realease_resources()
390 * unregisters the v4l2,i2c and usb devices
391 * called when the device gets disconected or at module unload
392 */
393 static void em28xx_release_resources(struct em28xx *dev)
394 {
395 down(&em28xx_sysfs_lock);
396
397 em28xx_info("V4L2 device /dev/video%d deregistered\n",
398 dev->vdev->minor);
399 list_del(&dev->devlist);
400 video_unregister_device(dev->vdev);
401 /* video_unregister_device(dev->vbi_dev); */
402 em28xx_i2c_unregister(dev);
403 usb_put_dev(dev->udev);
404 up(&em28xx_sysfs_lock);
405 }
406
407 /*
408 * em28xx_v4l2_close()
409 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
410 */
411 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
412 {
413 int errCode;
414 struct em28xx *dev=filp->private_data;
415
416 em28xx_videodbg("users=%d\n", dev->users);
417
418 down(&dev->lock);
419
420 em28xx_uninit_isoc(dev);
421
422 em28xx_release_buffers(dev);
423
424 /* the device is already disconnect, free the remaining resources */
425 if (dev->state & DEV_DISCONNECTED) {
426 em28xx_release_resources(dev);
427 up(&dev->lock);
428 kfree(dev);
429 return 0;
430 }
431
432 /* set alternate 0 */
433 dev->alt = 0;
434 em28xx_videodbg("setting alternate 0\n");
435 errCode = usb_set_interface(dev->udev, 0, 0);
436 if (errCode < 0) {
437 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
438 errCode);
439 }
440
441 dev->users--;
442 wake_up_interruptible_nr(&dev->open, 1);
443 up(&dev->lock);
444 return 0;
445 }
446
447 /*
448 * em28xx_v4l2_read()
449 * will allocate buffers when called for the first time
450 */
451 static ssize_t
452 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
453 loff_t * f_pos)
454 {
455 struct em28xx_frame_t *f, *i;
456 unsigned long lock_flags;
457 int ret = 0;
458 struct em28xx *dev = filp->private_data;
459
460 if (down_interruptible(&dev->fileop_lock))
461 return -ERESTARTSYS;
462
463 if (dev->state & DEV_DISCONNECTED) {
464 em28xx_videodbg("device not present\n");
465 up(&dev->fileop_lock);
466 return -ENODEV;
467 }
468
469 if (dev->state & DEV_MISCONFIGURED) {
470 em28xx_videodbg("device misconfigured; close and open it again\n");
471 up(&dev->fileop_lock);
472 return -EIO;
473 }
474
475 if (dev->io == IO_MMAP) {
476 em28xx_videodbg ("IO method is set to mmap; close and open"
477 " the device again to choose the read method\n");
478 up(&dev->fileop_lock);
479 return -EINVAL;
480 }
481
482 if (dev->io == IO_NONE) {
483 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
484 em28xx_errdev("read failed, not enough memory\n");
485 up(&dev->fileop_lock);
486 return -ENOMEM;
487 }
488 dev->io = IO_READ;
489 dev->stream = STREAM_ON;
490 em28xx_queue_unusedframes(dev);
491 }
492
493 if (!count) {
494 up(&dev->fileop_lock);
495 return 0;
496 }
497
498 if (list_empty(&dev->outqueue)) {
499 if (filp->f_flags & O_NONBLOCK) {
500 up(&dev->fileop_lock);
501 return -EAGAIN;
502 }
503 ret = wait_event_interruptible
504 (dev->wait_frame,
505 (!list_empty(&dev->outqueue)) ||
506 (dev->state & DEV_DISCONNECTED));
507 if (ret) {
508 up(&dev->fileop_lock);
509 return ret;
510 }
511 if (dev->state & DEV_DISCONNECTED) {
512 up(&dev->fileop_lock);
513 return -ENODEV;
514 }
515 }
516
517 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
518
519 spin_lock_irqsave(&dev->queue_lock, lock_flags);
520 list_for_each_entry(i, &dev->outqueue, frame)
521 i->state = F_UNUSED;
522 INIT_LIST_HEAD(&dev->outqueue);
523 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
524
525 em28xx_queue_unusedframes(dev);
526
527 if (count > f->buf.length)
528 count = f->buf.length;
529
530 if (copy_to_user(buf, f->bufmem, count)) {
531 up(&dev->fileop_lock);
532 return -EFAULT;
533 }
534 *f_pos += count;
535
536 up(&dev->fileop_lock);
537
538 return count;
539 }
540
541 /*
542 * em28xx_v4l2_poll()
543 * will allocate buffers when called for the first time
544 */
545 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
546 {
547 unsigned int mask = 0;
548 struct em28xx *dev = filp->private_data;
549
550 if (down_interruptible(&dev->fileop_lock))
551 return POLLERR;
552
553 if (dev->state & DEV_DISCONNECTED) {
554 em28xx_videodbg("device not present\n");
555 } else if (dev->state & DEV_MISCONFIGURED) {
556 em28xx_videodbg("device is misconfigured; close and open it again\n");
557 } else {
558 if (dev->io == IO_NONE) {
559 if (!em28xx_request_buffers
560 (dev, EM28XX_NUM_READ_FRAMES)) {
561 em28xx_warn
562 ("poll() failed, not enough memory\n");
563 } else {
564 dev->io = IO_READ;
565 dev->stream = STREAM_ON;
566 }
567 }
568
569 if (dev->io == IO_READ) {
570 em28xx_queue_unusedframes(dev);
571 poll_wait(filp, &dev->wait_frame, wait);
572
573 if (!list_empty(&dev->outqueue))
574 mask |= POLLIN | POLLRDNORM;
575
576 up(&dev->fileop_lock);
577
578 return mask;
579 }
580 }
581
582 up(&dev->fileop_lock);
583 return POLLERR;
584 }
585
586 /*
587 * em28xx_vm_open()
588 */
589 static void em28xx_vm_open(struct vm_area_struct *vma)
590 {
591 struct em28xx_frame_t *f = vma->vm_private_data;
592 f->vma_use_count++;
593 }
594
595 /*
596 * em28xx_vm_close()
597 */
598 static void em28xx_vm_close(struct vm_area_struct *vma)
599 {
600 /* NOTE: buffers are not freed here */
601 struct em28xx_frame_t *f = vma->vm_private_data;
602 f->vma_use_count--;
603 }
604
605 static struct vm_operations_struct em28xx_vm_ops = {
606 .open = em28xx_vm_open,
607 .close = em28xx_vm_close,
608 };
609
610 /*
611 * em28xx_v4l2_mmap()
612 */
613 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
614 {
615 unsigned long size = vma->vm_end - vma->vm_start,
616 start = vma->vm_start;
617 void *pos;
618 u32 i;
619
620 struct em28xx *dev = filp->private_data;
621
622 if (down_interruptible(&dev->fileop_lock))
623 return -ERESTARTSYS;
624
625 if (dev->state & DEV_DISCONNECTED) {
626 em28xx_videodbg("mmap: device not present\n");
627 up(&dev->fileop_lock);
628 return -ENODEV;
629 }
630
631 if (dev->state & DEV_MISCONFIGURED) {
632 em28xx_videodbg ("mmap: Device is misconfigured; close and "
633 "open it again\n");
634 up(&dev->fileop_lock);
635 return -EIO;
636 }
637
638 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
639 size != PAGE_ALIGN(dev->frame[0].buf.length)) {
640 up(&dev->fileop_lock);
641 return -EINVAL;
642 }
643
644 for (i = 0; i < dev->num_frames; i++) {
645 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
646 break;
647 }
648 if (i == dev->num_frames) {
649 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
650 up(&dev->fileop_lock);
651 return -EINVAL;
652 }
653
654 /* VM_IO is eventually going to replace PageReserved altogether */
655 vma->vm_flags |= VM_IO;
656 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
657
658 pos = dev->frame[i].bufmem;
659 while (size > 0) { /* size is page-aligned */
660 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
661 em28xx_videodbg("mmap: vm_insert_page failed\n");
662 up(&dev->fileop_lock);
663 return -EAGAIN;
664 }
665 start += PAGE_SIZE;
666 pos += PAGE_SIZE;
667 size -= PAGE_SIZE;
668 }
669
670 vma->vm_ops = &em28xx_vm_ops;
671 vma->vm_private_data = &dev->frame[i];
672
673 em28xx_vm_open(vma);
674 up(&dev->fileop_lock);
675 return 0;
676 }
677
678 /*
679 * em28xx_get_ctrl()
680 * return the current saturation, brightness or contrast, mute state
681 */
682 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
683 {
684 switch (ctrl->id) {
685 case V4L2_CID_AUDIO_MUTE:
686 ctrl->value = dev->mute;
687 return 0;
688 case V4L2_CID_AUDIO_VOLUME:
689 ctrl->value = dev->volume;
690 return 0;
691 default:
692 return -EINVAL;
693 }
694 }
695
696 /*FIXME: should be moved to saa711x */
697 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
698 {
699 s32 tmp;
700 switch (ctrl->id) {
701 case V4L2_CID_BRIGHTNESS:
702 if ((tmp = em28xx_brightness_get(dev)) < 0)
703 return -EIO;
704 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
705 return 0;
706 case V4L2_CID_CONTRAST:
707 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
708 return -EIO;
709 return 0;
710 case V4L2_CID_SATURATION:
711 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
712 return -EIO;
713 return 0;
714 case V4L2_CID_RED_BALANCE:
715 if ((tmp = em28xx_v_balance_get(dev)) < 0)
716 return -EIO;
717 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
718 return 0;
719 case V4L2_CID_BLUE_BALANCE:
720 if ((tmp = em28xx_u_balance_get(dev)) < 0)
721 return -EIO;
722 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
723 return 0;
724 case V4L2_CID_GAMMA:
725 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
726 return -EIO;
727 return 0;
728 default:
729 return -EINVAL;
730 }
731 }
732
733 /*
734 * em28xx_set_ctrl()
735 * mute or set new saturation, brightness or contrast
736 */
737 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
738 {
739 switch (ctrl->id) {
740 case V4L2_CID_AUDIO_MUTE:
741 if (ctrl->value != dev->mute) {
742 dev->mute = ctrl->value;
743 em28xx_audio_usb_mute(dev, ctrl->value);
744 return em28xx_audio_analog_set(dev);
745 }
746 return 0;
747 case V4L2_CID_AUDIO_VOLUME:
748 dev->volume = ctrl->value;
749 return em28xx_audio_analog_set(dev);
750 default:
751 return -EINVAL;
752 }
753 }
754
755 /*FIXME: should be moved to saa711x */
756 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
757 {
758 switch (ctrl->id) {
759 case V4L2_CID_BRIGHTNESS:
760 return em28xx_brightness_set(dev, ctrl->value);
761 case V4L2_CID_CONTRAST:
762 return em28xx_contrast_set(dev, ctrl->value);
763 case V4L2_CID_SATURATION:
764 return em28xx_saturation_set(dev, ctrl->value);
765 case V4L2_CID_RED_BALANCE:
766 return em28xx_v_balance_set(dev, ctrl->value);
767 case V4L2_CID_BLUE_BALANCE:
768 return em28xx_u_balance_set(dev, ctrl->value);
769 case V4L2_CID_GAMMA:
770 return em28xx_gamma_set(dev, ctrl->value);
771 default:
772 return -EINVAL;
773 }
774 }
775
776 /*
777 * em28xx_stream_interrupt()
778 * stops streaming
779 */
780 static int em28xx_stream_interrupt(struct em28xx *dev)
781 {
782 int ret = 0;
783
784 /* stop reading from the device */
785
786 dev->stream = STREAM_INTERRUPT;
787 ret = wait_event_timeout(dev->wait_stream,
788 (dev->stream == STREAM_OFF) ||
789 (dev->state & DEV_DISCONNECTED),
790 EM28XX_URB_TIMEOUT);
791 if (dev->state & DEV_DISCONNECTED)
792 return -ENODEV;
793 else if (ret) {
794 dev->state |= DEV_MISCONFIGURED;
795 em28xx_videodbg("device is misconfigured; close and "
796 "open /dev/video%d again\n", dev->vdev->minor);
797 return ret;
798 }
799
800 return 0;
801 }
802
803 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
804 {
805 unsigned int hscale, vscale;
806 unsigned int maxh, maxw;
807
808 maxw = norm_maxw(dev);
809 maxh = norm_maxh(dev);
810
811 /* width must even because of the YUYV format */
812 /* height must be even because of interlacing */
813 height &= 0xfffe;
814 width &= 0xfffe;
815
816 if (height < 32)
817 height = 32;
818 if (height > maxh)
819 height = maxh;
820 if (width < 48)
821 width = 48;
822 if (width > maxw)
823 width = maxw;
824
825 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
826 hscale = 0x3fff;
827 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
828
829 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
830 vscale = 0x3fff;
831 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
832
833 /* set new image size */
834 dev->width = width;
835 dev->height = height;
836 dev->frame_size = dev->width * dev->height * 2;
837 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
838 dev->bytesperline = dev->width * 2;
839 dev->hscale = hscale;
840 dev->vscale = vscale;
841
842 em28xx_resolution_set(dev);
843
844 return 0;
845 }
846
847 /*
848 * em28xx_v4l2_do_ioctl()
849 * This function is _not_ called directly, but from
850 * em28xx_v4l2_ioctl. Userspace
851 * copying is done already, arg is a kernel pointer.
852 */
853 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
854 struct em28xx *dev, unsigned int cmd, void *arg,
855 v4l2_kioctl driver_ioctl)
856 {
857 int ret;
858
859 switch (cmd) {
860 /* ---------- tv norms ---------- */
861 case VIDIOC_ENUMSTD:
862 {
863 struct v4l2_standard *e = arg;
864 unsigned int i;
865
866 i = e->index;
867 if (i >= TVNORMS)
868 return -EINVAL;
869 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
870 tvnorms[e->index].name);
871 e->index = i;
872 if (ret < 0)
873 return ret;
874 return 0;
875 }
876 case VIDIOC_G_STD:
877 {
878 v4l2_std_id *id = arg;
879
880 *id = dev->tvnorm->id;
881 return 0;
882 }
883 case VIDIOC_S_STD:
884 {
885 v4l2_std_id *id = arg;
886 unsigned int i;
887
888 for (i = 0; i < TVNORMS; i++)
889 if (*id == tvnorms[i].id)
890 break;
891 if (i == TVNORMS)
892 for (i = 0; i < TVNORMS; i++)
893 if (*id & tvnorms[i].id)
894 break;
895 if (i == TVNORMS)
896 return -EINVAL;
897
898 down(&dev->lock);
899 dev->tvnorm = &tvnorms[i];
900
901 em28xx_set_norm(dev, dev->width, dev->height);
902
903 /*
904 dev->width=norm_maxw(dev);
905 dev->height=norm_maxh(dev);
906 dev->frame_size=dev->width*dev->height*2;
907 dev->field_size=dev->frame_size>>1;
908 dev->bytesperline=dev->width*2;
909 dev->hscale=0;
910 dev->vscale=0;
911
912 em28xx_resolution_set(dev);
913 */
914 /*
915 em28xx_uninit_isoc(dev);
916 em28xx_set_alternate(dev);
917 em28xx_capture_start(dev, 1);
918 em28xx_resolution_set(dev);
919 em28xx_init_isoc(dev);
920 */
921 em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
922 &tvnorms[i].mode);
923 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
924 &dev->tvnorm->id);
925
926 up(&dev->lock);
927
928 return 0;
929 }
930
931 /* ------ input switching ---------- */
932 case VIDIOC_ENUMINPUT:
933 {
934 struct v4l2_input *i = arg;
935 unsigned int n;
936 static const char *iname[] = {
937 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
938 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
939 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
940 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
941 [EM28XX_VMUX_SVIDEO] = "S-Video",
942 [EM28XX_VMUX_TELEVISION] = "Television",
943 [EM28XX_VMUX_CABLE] = "Cable TV",
944 [EM28XX_VMUX_DVB] = "DVB",
945 [EM28XX_VMUX_DEBUG] = "for debug only",
946 };
947
948 n = i->index;
949 if (n >= MAX_EM28XX_INPUT)
950 return -EINVAL;
951 if (0 == INPUT(n)->type)
952 return -EINVAL;
953 memset(i, 0, sizeof(*i));
954 i->index = n;
955 i->type = V4L2_INPUT_TYPE_CAMERA;
956 strcpy(i->name, iname[INPUT(n)->type]);
957 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
958 (EM28XX_VMUX_CABLE == INPUT(n)->type))
959 i->type = V4L2_INPUT_TYPE_TUNER;
960 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
961 i->std |= tvnorms[n].id;
962 return 0;
963 }
964
965 case VIDIOC_G_INPUT:
966 {
967 int *i = arg;
968 *i = dev->ctl_input;
969
970 return 0;
971 }
972
973 case VIDIOC_S_INPUT:
974 {
975 int *index = arg;
976
977 if (*index >= MAX_EM28XX_INPUT)
978 return -EINVAL;
979 if (0 == INPUT(*index)->type)
980 return -EINVAL;
981
982 down(&dev->lock);
983 video_mux(dev, *index);
984 up(&dev->lock);
985
986 return 0;
987 }
988
989 case VIDIOC_G_AUDIO:
990 {
991 struct v4l2_audio *a = arg;
992 unsigned int index = a->index;
993
994 if (a->index > 1)
995 return -EINVAL;
996 memset(a, 0, sizeof(*a));
997 index = dev->ctl_ainput;
998
999 if (index == 0) {
1000 strcpy(a->name, "Television");
1001 } else {
1002 strcpy(a->name, "Line In");
1003 }
1004 a->capability = V4L2_AUDCAP_STEREO;
1005 a->index = index;
1006 return 0;
1007 }
1008
1009 case VIDIOC_S_AUDIO:
1010 {
1011 struct v4l2_audio *a = arg;
1012 if (a->index != dev->ctl_ainput)
1013 return -EINVAL;
1014
1015 return 0;
1016 }
1017
1018 /* --- controls ---------------------------------------------- */
1019 case VIDIOC_QUERYCTRL:
1020 {
1021 struct v4l2_queryctrl *qc = arg;
1022 int i, id=qc->id;
1023
1024 memset(qc,0,sizeof(*qc));
1025 qc->id=id;
1026
1027 if (!dev->has_msp34xx) {
1028 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1029 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1030 memcpy(qc, &(em28xx_qctrl[i]),
1031 sizeof(*qc));
1032 return 0;
1033 }
1034 }
1035 }
1036 if (dev->decoder == EM28XX_TVP5150) {
1037 em28xx_i2c_call_clients(dev,cmd,qc);
1038 if (qc->type)
1039 return 0;
1040 else
1041 return -EINVAL;
1042 }
1043 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1044 if (qc->id && qc->id == saa711x_qctrl[i].id) {
1045 memcpy(qc, &(saa711x_qctrl[i]),
1046 sizeof(*qc));
1047 return 0;
1048 }
1049 }
1050
1051 return -EINVAL;
1052 }
1053
1054 case VIDIOC_G_CTRL:
1055 {
1056 struct v4l2_control *ctrl = arg;
1057 int retval=-EINVAL;
1058
1059 if (!dev->has_msp34xx)
1060 retval=em28xx_get_ctrl(dev, ctrl);
1061 if (retval==-EINVAL) {
1062 if (dev->decoder == EM28XX_TVP5150) {
1063 em28xx_i2c_call_clients(dev,cmd,arg);
1064 return 0;
1065 }
1066
1067 return saa711x_get_ctrl(dev, ctrl);
1068 } else return retval;
1069 }
1070
1071 case VIDIOC_S_CTRL:
1072 {
1073 struct v4l2_control *ctrl = arg;
1074 u8 i;
1075
1076 if (!dev->has_msp34xx){
1077 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1078 if (ctrl->id == em28xx_qctrl[i].id) {
1079 if (ctrl->value <
1080 em28xx_qctrl[i].minimum
1081 || ctrl->value >
1082 em28xx_qctrl[i].maximum)
1083 return -ERANGE;
1084 return em28xx_set_ctrl(dev, ctrl);
1085 }
1086 }
1087 }
1088
1089 if (dev->decoder == EM28XX_TVP5150) {
1090 em28xx_i2c_call_clients(dev,cmd,arg);
1091 return 0;
1092 } else {
1093
1094 if (!dev->has_msp34xx){
1095 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1096 if (ctrl->id == em28xx_qctrl[i].id) {
1097 if (ctrl->value <
1098 em28xx_qctrl[i].minimum
1099 || ctrl->value >
1100 em28xx_qctrl[i].maximum)
1101 return -ERANGE;
1102 return em28xx_set_ctrl(dev, ctrl);
1103 }
1104 }
1105 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1106 if (ctrl->id == saa711x_qctrl[i].id) {
1107 if (ctrl->value <
1108 saa711x_qctrl[i].minimum
1109 || ctrl->value >
1110 saa711x_qctrl[i].maximum)
1111 return -ERANGE;
1112 return saa711x_set_ctrl(dev, ctrl);
1113 }
1114 }
1115 }
1116
1117 return -EINVAL;
1118 }
1119
1120 /* --- tuner ioctls ------------------------------------------ */
1121 case VIDIOC_G_TUNER:
1122 {
1123 struct v4l2_tuner *t = arg;
1124 int status = 0;
1125
1126 if (0 != t->index)
1127 return -EINVAL;
1128
1129 memset(t, 0, sizeof(*t));
1130 strcpy(t->name, "Tuner");
1131 t->type = V4L2_TUNER_ANALOG_TV;
1132 t->capability = V4L2_TUNER_CAP_NORM;
1133 t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
1134 /* t->signal = 0xffff;*/
1135 /* em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1136 /* No way to get signal strength? */
1137 down(&dev->lock);
1138 em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1139 &status);
1140 up(&dev->lock);
1141 t->signal =
1142 (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1143
1144 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1145 t->afc);
1146 return 0;
1147 }
1148 case VIDIOC_S_TUNER:
1149 {
1150 struct v4l2_tuner *t = arg;
1151 int status = 0;
1152
1153 if (0 != t->index)
1154 return -EINVAL;
1155 memset(t, 0, sizeof(*t));
1156 strcpy(t->name, "Tuner");
1157 t->type = V4L2_TUNER_ANALOG_TV;
1158 t->capability = V4L2_TUNER_CAP_NORM;
1159 t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
1160 /* t->signal = 0xffff; */
1161 /* No way to get signal strength? */
1162 down(&dev->lock);
1163 em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1164 &status);
1165 up(&dev->lock);
1166 t->signal =
1167 (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1168
1169 em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1170 t->signal, t->afc);
1171 return 0;
1172 }
1173 case VIDIOC_G_FREQUENCY:
1174 {
1175 struct v4l2_frequency *f = arg;
1176
1177 memset(f, 0, sizeof(*f));
1178 f->type = V4L2_TUNER_ANALOG_TV;
1179 f->frequency = dev->ctl_freq;
1180
1181 return 0;
1182 }
1183 case VIDIOC_S_FREQUENCY:
1184 {
1185 struct v4l2_frequency *f = arg;
1186
1187 if (0 != f->tuner)
1188 return -EINVAL;
1189
1190 if (V4L2_TUNER_ANALOG_TV != f->type)
1191 return -EINVAL;
1192
1193 down(&dev->lock);
1194 dev->ctl_freq = f->frequency;
1195 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1196 up(&dev->lock);
1197 return 0;
1198 }
1199
1200 case VIDIOC_CROPCAP:
1201 {
1202 struct v4l2_cropcap *cc = arg;
1203
1204 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1205 return -EINVAL;
1206 cc->bounds.left = 0;
1207 cc->bounds.top = 0;
1208 cc->bounds.width = dev->width;
1209 cc->bounds.height = dev->height;
1210 cc->defrect = cc->bounds;
1211 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1212 cc->pixelaspect.denominator = 59;
1213 return 0;
1214 }
1215 case VIDIOC_STREAMON:
1216 {
1217 int *type = arg;
1218
1219 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1220 || dev->io != IO_MMAP)
1221 return -EINVAL;
1222
1223 if (list_empty(&dev->inqueue))
1224 return -EINVAL;
1225
1226 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
1227
1228 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1229
1230 return 0;
1231 }
1232 case VIDIOC_STREAMOFF:
1233 {
1234 int *type = arg;
1235 int ret;
1236
1237 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1238 || dev->io != IO_MMAP)
1239 return -EINVAL;
1240
1241 if (dev->stream == STREAM_ON) {
1242 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1243 if ((ret = em28xx_stream_interrupt(dev)))
1244 return ret;
1245 }
1246 em28xx_empty_framequeues(dev);
1247
1248 return 0;
1249 }
1250 default:
1251 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1252 driver_ioctl);
1253 }
1254 return 0;
1255 }
1256
1257 /*
1258 * em28xx_v4l2_do_ioctl()
1259 * This function is _not_ called directly, but from
1260 * em28xx_v4l2_ioctl. Userspace
1261 * copying is done already, arg is a kernel pointer.
1262 */
1263 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1264 unsigned int cmd, void *arg)
1265 {
1266 struct em28xx *dev = filp->private_data;
1267
1268 if (!dev)
1269 return -ENODEV;
1270
1271 if (video_debug > 1)
1272 em28xx_print_ioctl(dev->name,cmd);
1273
1274 switch (cmd) {
1275
1276 /* --- capabilities ------------------------------------------ */
1277 case VIDIOC_QUERYCAP:
1278 {
1279 struct v4l2_capability *cap = arg;
1280
1281 memset(cap, 0, sizeof(*cap));
1282 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1283 strlcpy(cap->card, em28xx_boards[dev->model].name,
1284 sizeof(cap->card));
1285 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1286 sizeof(cap->bus_info));
1287 cap->version = EM28XX_VERSION_CODE;
1288 cap->capabilities =
1289 V4L2_CAP_VIDEO_CAPTURE |
1290 V4L2_CAP_AUDIO |
1291 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1292 if (dev->has_tuner)
1293 cap->capabilities |= V4L2_CAP_TUNER;
1294 return 0;
1295 }
1296
1297 /* --- capture ioctls ---------------------------------------- */
1298 case VIDIOC_ENUM_FMT:
1299 {
1300 struct v4l2_fmtdesc *fmtd = arg;
1301
1302 if (fmtd->index != 0)
1303 return -EINVAL;
1304 memset(fmtd, 0, sizeof(*fmtd));
1305 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1306 strcpy(fmtd->description, "Packed YUY2");
1307 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1308 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1309 return 0;
1310 }
1311
1312 case VIDIOC_G_FMT:
1313 {
1314 struct v4l2_format *format = arg;
1315
1316 em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
1317 format->type ==
1318 V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1319 "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1320 V4L2_BUF_TYPE_VBI_CAPTURE ?
1321 "V4L2_BUF_TYPE_VBI_CAPTURE " :
1322 "not supported");
1323
1324 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1325 return -EINVAL;
1326
1327 format->fmt.pix.width = dev->width;
1328 format->fmt.pix.height = dev->height;
1329 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1330 format->fmt.pix.bytesperline = dev->bytesperline;
1331 format->fmt.pix.sizeimage = dev->frame_size;
1332 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1333 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1334
1335 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
1336 dev->height);
1337 return 0;
1338 }
1339
1340 case VIDIOC_TRY_FMT:
1341 case VIDIOC_S_FMT:
1342 {
1343 struct v4l2_format *format = arg;
1344 u32 i;
1345 int ret = 0;
1346 int width = format->fmt.pix.width;
1347 int height = format->fmt.pix.height;
1348 unsigned int hscale, vscale;
1349 unsigned int maxh, maxw;
1350
1351 maxw = norm_maxw(dev);
1352 maxh = norm_maxh(dev);
1353
1354 /* int both_fields; */
1355
1356 em28xx_videodbg("%s: type=%s\n",
1357 cmd ==
1358 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1359 "VIDIOC_S_FMT",
1360 format->type ==
1361 V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1362 "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1363 V4L2_BUF_TYPE_VBI_CAPTURE ?
1364 "V4L2_BUF_TYPE_VBI_CAPTURE " :
1365 "not supported");
1366
1367 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1368 return -EINVAL;
1369
1370 em28xx_videodbg("%s: requested %dx%d\n",
1371 cmd ==
1372 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1373 "VIDIOC_S_FMT", format->fmt.pix.width,
1374 format->fmt.pix.height);
1375
1376 /* FIXME: Move some code away from here */
1377 /* width must even because of the YUYV format */
1378 /* height must be even because of interlacing */
1379 height &= 0xfffe;
1380 width &= 0xfffe;
1381
1382 if (height < 32)
1383 height = 32;
1384 if (height > maxh)
1385 height = maxh;
1386 if (width < 48)
1387 width = 48;
1388 if (width > maxw)
1389 width = maxw;
1390
1391 if(dev->is_em2800){
1392 /* the em2800 can only scale down to 50% */
1393 if(height % (maxh / 2))
1394 height=maxh;
1395 if(width % (maxw / 2))
1396 width=maxw;
1397 /* according to empiatech support */
1398 /* the MaxPacketSize is to small to support */
1399 /* framesizes larger than 640x480 @ 30 fps */
1400 /* or 640x576 @ 25 fps. As this would cut */
1401 /* of a part of the image we prefer */
1402 /* 360x576 or 360x480 for now */
1403 if(width == maxw && height == maxh)
1404 width /= 2;
1405 }
1406
1407 if ((hscale =
1408 (((unsigned long)maxw) << 12) / width - 4096L) >=
1409 0x4000)
1410 hscale = 0x3fff;
1411 width =
1412 (((unsigned long)maxw) << 12) / (hscale + 4096L);
1413
1414 if ((vscale =
1415 (((unsigned long)maxh) << 12) / height - 4096L) >=
1416 0x4000)
1417 vscale = 0x3fff;
1418 height =
1419 (((unsigned long)maxh) << 12) / (vscale + 4096L);
1420
1421 format->fmt.pix.width = width;
1422 format->fmt.pix.height = height;
1423 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1424 format->fmt.pix.bytesperline = width * 2;
1425 format->fmt.pix.sizeimage = width * 2 * height;
1426 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1427 format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1428
1429 em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1430 cmd ==
1431 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1432 "VIDIOC_S_FMT", format->fmt.pix.width,
1433 format->fmt.pix.height, hscale, vscale);
1434
1435 if (cmd == VIDIOC_TRY_FMT)
1436 return 0;
1437
1438 for (i = 0; i < dev->num_frames; i++)
1439 if (dev->frame[i].vma_use_count) {
1440 em28xx_videodbg("VIDIOC_S_FMT failed. "
1441 "Unmap the buffers first.\n");
1442 return -EINVAL;
1443 }
1444
1445 /* stop io in case it is already in progress */
1446 if (dev->stream == STREAM_ON) {
1447 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1448 if ((ret = em28xx_stream_interrupt(dev)))
1449 return ret;
1450 }
1451
1452 em28xx_release_buffers(dev);
1453 dev->io = IO_NONE;
1454
1455 /* set new image size */
1456 dev->width = width;
1457 dev->height = height;
1458 dev->frame_size = dev->width * dev->height * 2;
1459 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1460 dev->bytesperline = dev->width * 2;
1461 dev->hscale = hscale;
1462 dev->vscale = vscale;
1463 /* dev->both_fileds = both_fileds; */
1464 em28xx_uninit_isoc(dev);
1465 em28xx_set_alternate(dev);
1466 em28xx_capture_start(dev, 1);
1467 em28xx_resolution_set(dev);
1468 em28xx_init_isoc(dev);
1469
1470 return 0;
1471 }
1472
1473 /* --- streaming capture ------------------------------------- */
1474 case VIDIOC_REQBUFS:
1475 {
1476 struct v4l2_requestbuffers *rb = arg;
1477 u32 i;
1478 int ret;
1479
1480 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1481 rb->memory != V4L2_MEMORY_MMAP)
1482 return -EINVAL;
1483
1484 if (dev->io == IO_READ) {
1485 em28xx_videodbg ("method is set to read;"
1486 " close and open the device again to"
1487 " choose the mmap I/O method\n");
1488 return -EINVAL;
1489 }
1490
1491 for (i = 0; i < dev->num_frames; i++)
1492 if (dev->frame[i].vma_use_count) {
1493 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1494 return -EINVAL;
1495 }
1496
1497 if (dev->stream == STREAM_ON) {
1498 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1499 if ((ret = em28xx_stream_interrupt(dev)))
1500 return ret;
1501 }
1502
1503 em28xx_empty_framequeues(dev);
1504
1505 em28xx_release_buffers(dev);
1506 if (rb->count)
1507 rb->count =
1508 em28xx_request_buffers(dev, rb->count);
1509
1510 dev->frame_current = NULL;
1511
1512 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1513 rb->count);
1514 dev->io = rb->count ? IO_MMAP : IO_NONE;
1515 return 0;
1516 }
1517
1518 case VIDIOC_QUERYBUF:
1519 {
1520 struct v4l2_buffer *b = arg;
1521
1522 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1523 b->index >= dev->num_frames || dev->io != IO_MMAP)
1524 return -EINVAL;
1525
1526 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1527
1528 if (dev->frame[b->index].vma_use_count) {
1529 b->flags |= V4L2_BUF_FLAG_MAPPED;
1530 }
1531 if (dev->frame[b->index].state == F_DONE)
1532 b->flags |= V4L2_BUF_FLAG_DONE;
1533 else if (dev->frame[b->index].state != F_UNUSED)
1534 b->flags |= V4L2_BUF_FLAG_QUEUED;
1535 return 0;
1536 }
1537 case VIDIOC_QBUF:
1538 {
1539 struct v4l2_buffer *b = arg;
1540 unsigned long lock_flags;
1541
1542 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1543 b->index >= dev->num_frames || dev->io != IO_MMAP) {
1544 return -EINVAL;
1545 }
1546
1547 if (dev->frame[b->index].state != F_UNUSED) {
1548 return -EAGAIN;
1549 }
1550 dev->frame[b->index].state = F_QUEUED;
1551
1552 /* add frame to fifo */
1553 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1554 list_add_tail(&dev->frame[b->index].frame,
1555 &dev->inqueue);
1556 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1557
1558 return 0;
1559 }
1560 case VIDIOC_DQBUF:
1561 {
1562 struct v4l2_buffer *b = arg;
1563 struct em28xx_frame_t *f;
1564 unsigned long lock_flags;
1565 int ret = 0;
1566
1567 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1568 || dev->io != IO_MMAP)
1569 return -EINVAL;
1570
1571 if (list_empty(&dev->outqueue)) {
1572 if (dev->stream == STREAM_OFF)
1573 return -EINVAL;
1574 if (filp->f_flags & O_NONBLOCK)
1575 return -EAGAIN;
1576 ret = wait_event_interruptible
1577 (dev->wait_frame,
1578 (!list_empty(&dev->outqueue)) ||
1579 (dev->state & DEV_DISCONNECTED));
1580 if (ret)
1581 return ret;
1582 if (dev->state & DEV_DISCONNECTED)
1583 return -ENODEV;
1584 }
1585
1586 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1587 f = list_entry(dev->outqueue.next,
1588 struct em28xx_frame_t, frame);
1589 list_del(dev->outqueue.next);
1590 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1591
1592 f->state = F_UNUSED;
1593 memcpy(b, &f->buf, sizeof(*b));
1594
1595 if (f->vma_use_count)
1596 b->flags |= V4L2_BUF_FLAG_MAPPED;
1597
1598 return 0;
1599 }
1600 default:
1601 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1602 em28xx_video_do_ioctl);
1603 }
1604 return 0;
1605 }
1606
1607 /*
1608 * em28xx_v4l2_ioctl()
1609 * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1610 */
1611 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1612 unsigned int cmd, unsigned long arg)
1613 {
1614 int ret = 0;
1615 struct em28xx *dev = filp->private_data;
1616
1617 if (down_interruptible(&dev->fileop_lock))
1618 return -ERESTARTSYS;
1619
1620 if (dev->state & DEV_DISCONNECTED) {
1621 em28xx_errdev("v4l2 ioctl: device not present\n");
1622 up(&dev->fileop_lock);
1623 return -ENODEV;
1624 }
1625
1626 if (dev->state & DEV_MISCONFIGURED) {
1627 em28xx_errdev
1628 ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1629 up(&dev->fileop_lock);
1630 return -EIO;
1631 }
1632
1633 ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1634
1635 up(&dev->fileop_lock);
1636
1637 return ret;
1638 }
1639
1640 static struct file_operations em28xx_v4l_fops = {
1641 .owner = THIS_MODULE,
1642 .open = em28xx_v4l2_open,
1643 .release = em28xx_v4l2_close,
1644 .ioctl = em28xx_v4l2_ioctl,
1645 .read = em28xx_v4l2_read,
1646 .poll = em28xx_v4l2_poll,
1647 .mmap = em28xx_v4l2_mmap,
1648 .llseek = no_llseek,
1649 .compat_ioctl = v4l_compat_ioctl32,
1650
1651 };
1652
1653 /******************************** usb interface *****************************************/
1654
1655 /*
1656 * em28xx_init_dev()
1657 * allocates and inits the device structs, registers i2c bus and v4l device
1658 */
1659 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1660 int minor, int model)
1661 {
1662 struct em28xx *dev = *devhandle;
1663 int retval = -ENOMEM;
1664 int errCode, i;
1665 unsigned int maxh, maxw;
1666
1667 dev->udev = udev;
1668 dev->model = model;
1669 init_MUTEX(&dev->lock);
1670 init_waitqueue_head(&dev->open);
1671
1672 dev->em28xx_write_regs = em28xx_write_regs;
1673 dev->em28xx_read_reg = em28xx_read_reg;
1674 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1675 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1676 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1677 dev->is_em2800 = em28xx_boards[model].is_em2800;
1678 dev->has_tuner = em28xx_boards[model].has_tuner;
1679 dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1680 dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1681 dev->decoder = em28xx_boards[model].decoder;
1682
1683 if (tuner >= 0)
1684 dev->tuner_type = tuner;
1685 else
1686 dev->tuner_type = em28xx_boards[model].tuner_type;
1687
1688 dev->video_inputs = em28xx_boards[model].vchannels;
1689
1690 for (i = 0; i < TVNORMS; i++)
1691 if (em28xx_boards[model].norm == tvnorms[i].mode)
1692 break;
1693 if (i == TVNORMS)
1694 i = 0;
1695
1696 dev->tvnorm = &tvnorms[i]; /* set default norm */
1697
1698 em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1699
1700 maxw = norm_maxw(dev);
1701 maxh = norm_maxh(dev);
1702
1703 /* set default image size */
1704 dev->width = maxw;
1705 dev->height = maxh;
1706 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1707 dev->field_size = dev->width * dev->height;
1708 dev->frame_size =
1709 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1710 dev->bytesperline = dev->width * 2;
1711 dev->hscale = 0;
1712 dev->vscale = 0;
1713 dev->ctl_input = 2;
1714
1715 /* setup video picture settings for saa7113h */
1716 memset(&dev->vpic, 0, sizeof(dev->vpic));
1717 dev->vpic.colour = 128 << 8;
1718 dev->vpic.hue = 128 << 8;
1719 dev->vpic.brightness = 128 << 8;
1720 dev->vpic.contrast = 192 << 8;
1721 dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1722 dev->vpic.depth = 16;
1723 dev->vpic.palette = VIDEO_PALETTE_YUV422;
1724
1725 #ifdef CONFIG_MODULES
1726 /* request some modules */
1727 if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1728 request_module("saa711x");
1729 if (dev->decoder == EM28XX_TVP5150)
1730 request_module("tvp5150");
1731 if (dev->has_tuner)
1732 request_module("tuner");
1733 if (dev->tda9887_conf)
1734 request_module("tda9887");
1735 #endif
1736 errCode = em28xx_config(dev);
1737 if (errCode) {
1738 em28xx_errdev("error configuring device\n");
1739 kfree(dev);
1740 return -ENOMEM;
1741 }
1742
1743 down(&dev->lock);
1744 /* register i2c bus */
1745 em28xx_i2c_register(dev);
1746
1747 /* Do board specific init and eeprom reading */
1748 em28xx_card_setup(dev);
1749
1750 /* configure the device */
1751 em28xx_config_i2c(dev);
1752
1753 up(&dev->lock);
1754
1755 errCode = em28xx_config(dev);
1756
1757 #ifdef CONFIG_MODULES
1758 if (dev->has_msp34xx)
1759 request_module("msp3400");
1760 #endif
1761 /* allocate and fill v4l2 device struct */
1762 dev->vdev = video_device_alloc();
1763 if (NULL == dev->vdev) {
1764 em28xx_errdev("cannot allocate video_device.\n");
1765 kfree(dev);
1766 return -ENOMEM;
1767 }
1768
1769 dev->vdev->type = VID_TYPE_CAPTURE;
1770 if (dev->has_tuner)
1771 dev->vdev->type |= VID_TYPE_TUNER;
1772 dev->vdev->hardware = 0;
1773 dev->vdev->fops = &em28xx_v4l_fops;
1774 dev->vdev->minor = -1;
1775 dev->vdev->dev = &dev->udev->dev;
1776 dev->vdev->release = video_device_release;
1777 snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1778 "em28xx video");
1779 list_add_tail(&dev->devlist,&em28xx_devlist);
1780
1781 /* register v4l2 device */
1782 down(&dev->lock);
1783 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1784 em28xx_errdev("unable to register video device (error=%i).\n",
1785 retval);
1786 up(&dev->lock);
1787 list_del(&dev->devlist);
1788 video_device_release(dev->vdev);
1789 kfree(dev);
1790 return -ENODEV;
1791 }
1792 if (dev->has_msp34xx) {
1793 /* Send a reset to other chips via gpio */
1794 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1795 udelay(2500);
1796 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1797 udelay(2500);
1798
1799 }
1800 video_mux(dev, 0);
1801
1802 up(&dev->lock);
1803
1804 em28xx_info("V4L2 device registered as /dev/video%d\n",
1805 dev->vdev->minor);
1806
1807 return 0;
1808 }
1809
1810 /*
1811 * em28xx_usb_probe()
1812 * checks for supported devices
1813 */
1814 static int em28xx_usb_probe(struct usb_interface *interface,
1815 const struct usb_device_id *id)
1816 {
1817 const struct usb_endpoint_descriptor *endpoint;
1818 struct usb_device *udev;
1819 struct usb_interface *uif;
1820 struct em28xx *dev = NULL;
1821 int retval = -ENODEV;
1822 int model,i,nr,ifnum;
1823
1824 udev = usb_get_dev(interface_to_usbdev(interface));
1825 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1826
1827
1828 /* Don't register audio interfaces */
1829 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1830 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1831 udev->descriptor.idVendor,udev->descriptor.idProduct,
1832 ifnum,
1833 interface->altsetting[0].desc.bInterfaceClass);
1834 return -ENODEV;
1835 }
1836
1837 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1838 udev->descriptor.idVendor,udev->descriptor.idProduct,
1839 ifnum,
1840 interface->altsetting[0].desc.bInterfaceClass);
1841
1842 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1843
1844 /* check if the the device has the iso in endpoint at the correct place */
1845 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1846 USB_ENDPOINT_XFER_ISOC) {
1847 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1848 return -ENODEV;
1849 }
1850 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1851 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1852 return -ENODEV;
1853 }
1854
1855 model=id->driver_info;
1856 nr=interface->minor;
1857
1858 if (nr>EM28XX_MAXBOARDS) {
1859 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1860 return -ENOMEM;
1861 }
1862
1863 /* allocate memory for our device state and initialize it */
1864 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
1865 if (dev == NULL) {
1866 em28xx_err(DRIVER_NAME ": out of memory!\n");
1867 return -ENOMEM;
1868 }
1869 memset(dev, 0, sizeof(*dev));
1870
1871 /* compute alternate max packet sizes */
1872 uif = udev->actconfig->interface[0];
1873
1874 dev->num_alt=uif->num_altsetting;
1875 printk(DRIVER_NAME ": Alternate settings: %i\n",dev->num_alt);
1876 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1877 dev->alt_max_pkt_size = kmalloc(32*
1878 dev->num_alt,GFP_KERNEL);
1879 if (dev->alt_max_pkt_size == NULL) {
1880 em28xx_err(DRIVER_NAME ": out of memory!\n");
1881 return -ENOMEM;
1882 }
1883
1884 for (i = 0; i < dev->num_alt ; i++) {
1885 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1886 wMaxPacketSize);
1887 dev->alt_max_pkt_size[i] =
1888 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1889 printk(DRIVER_NAME ": Alternate setting %i, max size= %i\n",i,
1890 dev->alt_max_pkt_size[i]);
1891 }
1892
1893 snprintf(dev->name, 29, "em28xx #%d", nr);
1894
1895 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1896 model=card[nr];
1897
1898 if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1899 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1900 "%s: be autodetected. Please pass card=<n> insmod option to\n"
1901 "%s: workaround that. Redirect complaints to the vendor of\n"
1902 "%s: the TV card. Best regards,\n"
1903 "%s: -- tux\n",
1904 dev->name,dev->name,dev->name,dev->name,dev->name);
1905 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1906 dev->name);
1907 for (i = 0; i < em28xx_bcount; i++) {
1908 printk("%s: card=%d -> %s\n",
1909 dev->name, i, em28xx_boards[i].name);
1910 }
1911 }
1912
1913 /* allocate device struct */
1914 retval = em28xx_init_dev(&dev, udev, nr, model);
1915 if (retval)
1916 return retval;
1917
1918 em28xx_info("Found %s\n", em28xx_boards[model].name);
1919
1920 /* save our data pointer in this interface device */
1921 usb_set_intfdata(interface, dev);
1922 return 0;
1923 }
1924
1925 /*
1926 * em28xx_usb_disconnect()
1927 * called when the device gets diconencted
1928 * video device will be unregistered on v4l2_close in case it is still open
1929 */
1930 static void em28xx_usb_disconnect(struct usb_interface *interface)
1931 {
1932 struct em28xx *dev = usb_get_intfdata(interface);
1933 usb_set_intfdata(interface, NULL);
1934
1935 /*FIXME: IR should be disconnected */
1936
1937 if (!dev)
1938 return;
1939
1940
1941 down_write(&em28xx_disconnect);
1942
1943 down(&dev->lock);
1944
1945 em28xx_info("disconnecting %s\n", dev->vdev->name);
1946
1947 wake_up_interruptible_all(&dev->open);
1948
1949 if (dev->users) {
1950 em28xx_warn
1951 ("device /dev/video%d is open! Deregistration and memory "
1952 "deallocation are deferred on close.\n", dev->vdev->minor);
1953 dev->state |= DEV_MISCONFIGURED;
1954 em28xx_uninit_isoc(dev);
1955 dev->state |= DEV_DISCONNECTED;
1956 wake_up_interruptible(&dev->wait_frame);
1957 wake_up_interruptible(&dev->wait_stream);
1958 } else {
1959 dev->state |= DEV_DISCONNECTED;
1960 em28xx_release_resources(dev);
1961 }
1962
1963 up(&dev->lock);
1964
1965 if (!dev->users) {
1966 kfree(dev->alt_max_pkt_size);
1967 kfree(dev);
1968 }
1969
1970 up_write(&em28xx_disconnect);
1971 }
1972
1973 static struct usb_driver em28xx_usb_driver = {
1974 .name = "em28xx",
1975 .probe = em28xx_usb_probe,
1976 .disconnect = em28xx_usb_disconnect,
1977 .id_table = em28xx_id_table,
1978 };
1979
1980 static int __init em28xx_module_init(void)
1981 {
1982 int result;
1983
1984 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1985 (EM28XX_VERSION_CODE >> 16) & 0xff,
1986 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1987 #ifdef SNAPSHOT
1988 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1989 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1990 #endif
1991
1992 /* register this driver with the USB subsystem */
1993 result = usb_register(&em28xx_usb_driver);
1994 if (result)
1995 em28xx_err(DRIVER_NAME
1996 " usb_register failed. Error number %d.\n", result);
1997
1998 return result;
1999 }
2000
2001 static void __exit em28xx_module_exit(void)
2002 {
2003 /* deregister this driver with the USB subsystem */
2004 usb_deregister(&em28xx_usb_driver);
2005 }
2006
2007 module_init(em28xx_module_init);
2008 module_exit(em28xx_module_exit);
Software Suspend 2 for 2.6.18.y (mirror)