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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[deliverable/linux.git] / drivers / media / video / em28xx / em28xx-video.c
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@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/version.h>
35 #include <linux/mm.h>
36 #include <linux/video_decoder.h>
37 #include <linux/mutex.h>
38
39 #include "em28xx.h"
40 #include <media/tuner.h>
41 #include <media/v4l2-common.h>
42 #include <media/msp3400.h>
43
44 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
45 "Markus Rechberger <mrechberger@gmail.com>, " \
46 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
47 "Sascha Sommer <saschasommer@freenet.de>"
48
49 #define DRIVER_NAME "em28xx"
50 #define DRIVER_DESC "Empia em28xx based USB video device driver"
51 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1)
52
53 #define em28xx_videodbg(fmt, arg...) do {\
54 if (video_debug) \
55 printk(KERN_INFO "%s %s :"fmt, \
56 dev->name, __FUNCTION__ , ##arg); } while (0)
57
58 MODULE_AUTHOR(DRIVER_AUTHOR);
59 MODULE_DESCRIPTION(DRIVER_DESC);
60 MODULE_LICENSE("GPL");
61
62 static LIST_HEAD(em28xx_devlist);
63
64 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
67 module_param_array(card, int, NULL, 0444);
68 module_param_array(video_nr, int, NULL, 0444);
69 module_param_array(vbi_nr, int, NULL, 0444);
70 MODULE_PARM_DESC(card,"card type");
71 MODULE_PARM_DESC(video_nr,"video device numbers");
72 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
73
74 static int tuner = -1;
75 module_param(tuner, int, 0444);
76 MODULE_PARM_DESC(tuner, "tuner type");
77
78 static unsigned int video_debug = 0;
79 module_param(video_debug,int,0644);
80 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
81
82 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
83 static unsigned long em28xx_devused;
84
85 /* supported tv norms */
86 static struct em28xx_tvnorm tvnorms[] = {
87 {
88 .name = "PAL",
89 .id = V4L2_STD_PAL,
90 .mode = VIDEO_MODE_PAL,
91 }, {
92 .name = "NTSC",
93 .id = V4L2_STD_NTSC,
94 .mode = VIDEO_MODE_NTSC,
95 }, {
96 .name = "SECAM",
97 .id = V4L2_STD_SECAM,
98 .mode = VIDEO_MODE_SECAM,
99 }, {
100 .name = "PAL-M",
101 .id = V4L2_STD_PAL_M,
102 .mode = VIDEO_MODE_PAL,
103 }
104 };
105
106 #define TVNORMS ARRAY_SIZE(tvnorms)
107
108 /* supported controls */
109 /* Common to all boards */
110 static struct v4l2_queryctrl em28xx_qctrl[] = {
111 {
112 .id = V4L2_CID_AUDIO_VOLUME,
113 .type = V4L2_CTRL_TYPE_INTEGER,
114 .name = "Volume",
115 .minimum = 0x0,
116 .maximum = 0x1f,
117 .step = 0x1,
118 .default_value = 0x1f,
119 .flags = 0,
120 },{
121 .id = V4L2_CID_AUDIO_MUTE,
122 .type = V4L2_CTRL_TYPE_BOOLEAN,
123 .name = "Mute",
124 .minimum = 0,
125 .maximum = 1,
126 .step = 1,
127 .default_value = 1,
128 .flags = 0,
129 }
130 };
131
132 static struct usb_driver em28xx_usb_driver;
133
134 static DEFINE_MUTEX(em28xx_sysfs_lock);
135 static DECLARE_RWSEM(em28xx_disconnect);
136
137 /********************* v4l2 interface ******************************************/
138
139 /*
140 * em28xx_config()
141 * inits registers with sane defaults
142 */
143 static int em28xx_config(struct em28xx *dev)
144 {
145
146 /* Sets I2C speed to 100 KHz */
147 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
148
149 /* enable vbi capturing */
150
151 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
152 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
153 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
154
155 em28xx_audio_usb_mute(dev, 1);
156 dev->mute = 1; /* maybe not the right place... */
157 dev->volume = 0x1f;
158 em28xx_audio_analog_set(dev);
159 em28xx_audio_analog_setup(dev);
160 em28xx_outfmt_set_yuv422(dev);
161 em28xx_colorlevels_set_default(dev);
162 em28xx_compression_disable(dev);
163
164 return 0;
165 }
166
167 /*
168 * em28xx_config_i2c()
169 * configure i2c attached devices
170 */
171 static void em28xx_config_i2c(struct em28xx *dev)
172 {
173 struct v4l2_frequency f;
174 struct v4l2_routing route;
175
176 route.input = INPUT(dev->ctl_input)->vmux;
177 route.output = 0;
178 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
179 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
180 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
181
182 /* configure tuner */
183 f.tuner = 0;
184 f.type = V4L2_TUNER_ANALOG_TV;
185 f.frequency = 9076; /* FIXME:remove magic number */
186 dev->ctl_freq = f.frequency;
187 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
188
189 /* configure tda9887 */
190
191
192 /* em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
193 }
194
195 /*
196 * em28xx_empty_framequeues()
197 * prepare queues for incoming and outgoing frames
198 */
199 static void em28xx_empty_framequeues(struct em28xx *dev)
200 {
201 u32 i;
202
203 INIT_LIST_HEAD(&dev->inqueue);
204 INIT_LIST_HEAD(&dev->outqueue);
205
206 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
207 dev->frame[i].state = F_UNUSED;
208 dev->frame[i].buf.bytesused = 0;
209 }
210 }
211
212 static void video_mux(struct em28xx *dev, int index)
213 {
214 int ainput;
215 struct v4l2_routing route;
216
217 route.input = INPUT(index)->vmux;
218 route.output = 0;
219 dev->ctl_input = index;
220 dev->ctl_ainput = INPUT(index)->amux;
221
222 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
223
224 em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
225
226 if (dev->has_msp34xx) {
227 if (dev->i2s_speed)
228 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
229 route.input = dev->ctl_ainput;
230 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
231 /* Note: this is msp3400 specific */
232 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
233 ainput = EM28XX_AUDIO_SRC_TUNER;
234 em28xx_audio_source(dev, ainput);
235 } else {
236 switch (dev->ctl_ainput) {
237 case 0:
238 ainput = EM28XX_AUDIO_SRC_TUNER;
239 break;
240 default:
241 ainput = EM28XX_AUDIO_SRC_LINE;
242 }
243 em28xx_audio_source(dev, ainput);
244 }
245 }
246
247 /*
248 * em28xx_v4l2_open()
249 * inits the device and starts isoc transfer
250 */
251 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
252 {
253 int minor = iminor(inode);
254 int errCode = 0;
255 struct em28xx *h,*dev = NULL;
256
257 list_for_each_entry(h, &em28xx_devlist, devlist) {
258 if (h->vdev->minor == minor) {
259 dev = h;
260 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
261 }
262 if (h->vbi_dev->minor == minor) {
263 dev = h;
264 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
265 }
266 }
267 if (NULL == dev)
268 return -ENODEV;
269
270 em28xx_videodbg("open minor=%d type=%s users=%d\n",
271 minor,v4l2_type_names[dev->type],dev->users);
272
273 if (!down_read_trylock(&em28xx_disconnect))
274 return -ERESTARTSYS;
275
276 if (dev->users) {
277 em28xx_warn("this driver can be opened only once\n");
278 up_read(&em28xx_disconnect);
279 return -EBUSY;
280 }
281
282 mutex_init(&dev->fileop_lock); /* to 1 == available */
283 spin_lock_init(&dev->queue_lock);
284 init_waitqueue_head(&dev->wait_frame);
285 init_waitqueue_head(&dev->wait_stream);
286
287 mutex_lock(&dev->lock);
288
289 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
290 em28xx_set_alternate(dev);
291
292 dev->width = norm_maxw(dev);
293 dev->height = norm_maxh(dev);
294 dev->frame_size = dev->width * dev->height * 2;
295 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
296 dev->bytesperline = dev->width * 2;
297 dev->hscale = 0;
298 dev->vscale = 0;
299
300 em28xx_capture_start(dev, 1);
301 em28xx_resolution_set(dev);
302
303 /* device needs to be initialized before isoc transfer */
304 video_mux(dev, 0);
305
306 /* start the transfer */
307 errCode = em28xx_init_isoc(dev);
308 if (errCode)
309 goto err;
310
311 }
312
313 dev->users++;
314 filp->private_data = dev;
315 dev->io = IO_NONE;
316 dev->stream = STREAM_OFF;
317 dev->num_frames = 0;
318
319 /* prepare queues */
320 em28xx_empty_framequeues(dev);
321
322 dev->state |= DEV_INITIALIZED;
323
324 err:
325 mutex_unlock(&dev->lock);
326 up_read(&em28xx_disconnect);
327 return errCode;
328 }
329
330 /*
331 * em28xx_realease_resources()
332 * unregisters the v4l2,i2c and usb devices
333 * called when the device gets disconected or at module unload
334 */
335 static void em28xx_release_resources(struct em28xx *dev)
336 {
337 mutex_lock(&em28xx_sysfs_lock);
338
339 /*FIXME: I2C IR should be disconnected */
340
341 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
342 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
343 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
344 list_del(&dev->devlist);
345 video_unregister_device(dev->vdev);
346 video_unregister_device(dev->vbi_dev);
347 em28xx_i2c_unregister(dev);
348 usb_put_dev(dev->udev);
349 mutex_unlock(&em28xx_sysfs_lock);
350
351
352 /* Mark device as unused */
353 em28xx_devused&=~(1<<dev->devno);
354 }
355
356 /*
357 * em28xx_v4l2_close()
358 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
359 */
360 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
361 {
362 int errCode;
363 struct em28xx *dev=filp->private_data;
364
365 em28xx_videodbg("users=%d\n", dev->users);
366
367 mutex_lock(&dev->lock);
368
369 em28xx_uninit_isoc(dev);
370
371 em28xx_release_buffers(dev);
372
373 /* the device is already disconnect, free the remaining resources */
374 if (dev->state & DEV_DISCONNECTED) {
375 em28xx_release_resources(dev);
376 mutex_unlock(&dev->lock);
377 kfree(dev);
378 return 0;
379 }
380
381 /* set alternate 0 */
382 dev->alt = 0;
383 em28xx_videodbg("setting alternate 0\n");
384 errCode = usb_set_interface(dev->udev, 0, 0);
385 if (errCode < 0) {
386 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
387 errCode);
388 }
389
390 dev->users--;
391 wake_up_interruptible_nr(&dev->open, 1);
392 mutex_unlock(&dev->lock);
393 return 0;
394 }
395
396 /*
397 * em28xx_v4l2_read()
398 * will allocate buffers when called for the first time
399 */
400 static ssize_t
401 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
402 loff_t * f_pos)
403 {
404 struct em28xx_frame_t *f, *i;
405 unsigned long lock_flags;
406 int ret = 0;
407 struct em28xx *dev = filp->private_data;
408
409 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
410 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
411 }
412 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
413 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
414 em28xx_videodbg("not supported yet! ...\n");
415 if (copy_to_user(buf, "", 1)) {
416 mutex_unlock(&dev->fileop_lock);
417 return -EFAULT;
418 }
419 return (1);
420 }
421 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
422 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
423 em28xx_videodbg("not supported yet! ...\n");
424 if (copy_to_user(buf, "", 1)) {
425 mutex_unlock(&dev->fileop_lock);
426 return -EFAULT;
427 }
428 return (1);
429 }
430
431 if (mutex_lock_interruptible(&dev->fileop_lock))
432 return -ERESTARTSYS;
433
434 if (dev->state & DEV_DISCONNECTED) {
435 em28xx_videodbg("device not present\n");
436 mutex_unlock(&dev->fileop_lock);
437 return -ENODEV;
438 }
439
440 if (dev->state & DEV_MISCONFIGURED) {
441 em28xx_videodbg("device misconfigured; close and open it again\n");
442 mutex_unlock(&dev->fileop_lock);
443 return -EIO;
444 }
445
446 if (dev->io == IO_MMAP) {
447 em28xx_videodbg ("IO method is set to mmap; close and open"
448 " the device again to choose the read method\n");
449 mutex_unlock(&dev->fileop_lock);
450 return -EINVAL;
451 }
452
453 if (dev->io == IO_NONE) {
454 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
455 em28xx_errdev("read failed, not enough memory\n");
456 mutex_unlock(&dev->fileop_lock);
457 return -ENOMEM;
458 }
459 dev->io = IO_READ;
460 dev->stream = STREAM_ON;
461 em28xx_queue_unusedframes(dev);
462 }
463
464 if (!count) {
465 mutex_unlock(&dev->fileop_lock);
466 return 0;
467 }
468
469 if (list_empty(&dev->outqueue)) {
470 if (filp->f_flags & O_NONBLOCK) {
471 mutex_unlock(&dev->fileop_lock);
472 return -EAGAIN;
473 }
474 ret = wait_event_interruptible
475 (dev->wait_frame,
476 (!list_empty(&dev->outqueue)) ||
477 (dev->state & DEV_DISCONNECTED));
478 if (ret) {
479 mutex_unlock(&dev->fileop_lock);
480 return ret;
481 }
482 if (dev->state & DEV_DISCONNECTED) {
483 mutex_unlock(&dev->fileop_lock);
484 return -ENODEV;
485 }
486 }
487
488 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
489
490 spin_lock_irqsave(&dev->queue_lock, lock_flags);
491 list_for_each_entry(i, &dev->outqueue, frame)
492 i->state = F_UNUSED;
493 INIT_LIST_HEAD(&dev->outqueue);
494 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
495
496 em28xx_queue_unusedframes(dev);
497
498 if (count > f->buf.length)
499 count = f->buf.length;
500
501 if (copy_to_user(buf, f->bufmem, count)) {
502 mutex_unlock(&dev->fileop_lock);
503 return -EFAULT;
504 }
505 *f_pos += count;
506
507 mutex_unlock(&dev->fileop_lock);
508
509 return count;
510 }
511
512 /*
513 * em28xx_v4l2_poll()
514 * will allocate buffers when called for the first time
515 */
516 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
517 {
518 unsigned int mask = 0;
519 struct em28xx *dev = filp->private_data;
520
521 if (mutex_lock_interruptible(&dev->fileop_lock))
522 return POLLERR;
523
524 if (dev->state & DEV_DISCONNECTED) {
525 em28xx_videodbg("device not present\n");
526 } else if (dev->state & DEV_MISCONFIGURED) {
527 em28xx_videodbg("device is misconfigured; close and open it again\n");
528 } else {
529 if (dev->io == IO_NONE) {
530 if (!em28xx_request_buffers
531 (dev, EM28XX_NUM_READ_FRAMES)) {
532 em28xx_warn
533 ("poll() failed, not enough memory\n");
534 } else {
535 dev->io = IO_READ;
536 dev->stream = STREAM_ON;
537 }
538 }
539
540 if (dev->io == IO_READ) {
541 em28xx_queue_unusedframes(dev);
542 poll_wait(filp, &dev->wait_frame, wait);
543
544 if (!list_empty(&dev->outqueue))
545 mask |= POLLIN | POLLRDNORM;
546
547 mutex_unlock(&dev->fileop_lock);
548
549 return mask;
550 }
551 }
552
553 mutex_unlock(&dev->fileop_lock);
554 return POLLERR;
555 }
556
557 /*
558 * em28xx_vm_open()
559 */
560 static void em28xx_vm_open(struct vm_area_struct *vma)
561 {
562 struct em28xx_frame_t *f = vma->vm_private_data;
563 f->vma_use_count++;
564 }
565
566 /*
567 * em28xx_vm_close()
568 */
569 static void em28xx_vm_close(struct vm_area_struct *vma)
570 {
571 /* NOTE: buffers are not freed here */
572 struct em28xx_frame_t *f = vma->vm_private_data;
573 f->vma_use_count--;
574 }
575
576 static struct vm_operations_struct em28xx_vm_ops = {
577 .open = em28xx_vm_open,
578 .close = em28xx_vm_close,
579 };
580
581 /*
582 * em28xx_v4l2_mmap()
583 */
584 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
585 {
586 unsigned long size = vma->vm_end - vma->vm_start,
587 start = vma->vm_start;
588 void *pos;
589 u32 i;
590
591 struct em28xx *dev = filp->private_data;
592
593 if (mutex_lock_interruptible(&dev->fileop_lock))
594 return -ERESTARTSYS;
595
596 if (dev->state & DEV_DISCONNECTED) {
597 em28xx_videodbg("mmap: device not present\n");
598 mutex_unlock(&dev->fileop_lock);
599 return -ENODEV;
600 }
601
602 if (dev->state & DEV_MISCONFIGURED) {
603 em28xx_videodbg ("mmap: Device is misconfigured; close and "
604 "open it again\n");
605 mutex_unlock(&dev->fileop_lock);
606 return -EIO;
607 }
608
609 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
610 size != PAGE_ALIGN(dev->frame[0].buf.length)) {
611 mutex_unlock(&dev->fileop_lock);
612 return -EINVAL;
613 }
614
615 for (i = 0; i < dev->num_frames; i++) {
616 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
617 break;
618 }
619 if (i == dev->num_frames) {
620 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
621 mutex_unlock(&dev->fileop_lock);
622 return -EINVAL;
623 }
624
625 /* VM_IO is eventually going to replace PageReserved altogether */
626 vma->vm_flags |= VM_IO;
627 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
628
629 pos = dev->frame[i].bufmem;
630 while (size > 0) { /* size is page-aligned */
631 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
632 em28xx_videodbg("mmap: vm_insert_page failed\n");
633 mutex_unlock(&dev->fileop_lock);
634 return -EAGAIN;
635 }
636 start += PAGE_SIZE;
637 pos += PAGE_SIZE;
638 size -= PAGE_SIZE;
639 }
640
641 vma->vm_ops = &em28xx_vm_ops;
642 vma->vm_private_data = &dev->frame[i];
643
644 em28xx_vm_open(vma);
645 mutex_unlock(&dev->fileop_lock);
646 return 0;
647 }
648
649 /*
650 * em28xx_get_ctrl()
651 * return the current saturation, brightness or contrast, mute state
652 */
653 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
654 {
655 switch (ctrl->id) {
656 case V4L2_CID_AUDIO_MUTE:
657 ctrl->value = dev->mute;
658 return 0;
659 case V4L2_CID_AUDIO_VOLUME:
660 ctrl->value = dev->volume;
661 return 0;
662 default:
663 return -EINVAL;
664 }
665 }
666
667 /*
668 * em28xx_set_ctrl()
669 * mute or set new saturation, brightness or contrast
670 */
671 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
672 {
673 switch (ctrl->id) {
674 case V4L2_CID_AUDIO_MUTE:
675 if (ctrl->value != dev->mute) {
676 dev->mute = ctrl->value;
677 em28xx_audio_usb_mute(dev, ctrl->value);
678 return em28xx_audio_analog_set(dev);
679 }
680 return 0;
681 case V4L2_CID_AUDIO_VOLUME:
682 dev->volume = ctrl->value;
683 return em28xx_audio_analog_set(dev);
684 default:
685 return -EINVAL;
686 }
687 }
688
689 /*
690 * em28xx_stream_interrupt()
691 * stops streaming
692 */
693 static int em28xx_stream_interrupt(struct em28xx *dev)
694 {
695 int ret = 0;
696
697 /* stop reading from the device */
698
699 dev->stream = STREAM_INTERRUPT;
700 ret = wait_event_timeout(dev->wait_stream,
701 (dev->stream == STREAM_OFF) ||
702 (dev->state & DEV_DISCONNECTED),
703 EM28XX_URB_TIMEOUT);
704 if (dev->state & DEV_DISCONNECTED)
705 return -ENODEV;
706 else if (ret) {
707 dev->state |= DEV_MISCONFIGURED;
708 em28xx_videodbg("device is misconfigured; close and "
709 "open /dev/video%d again\n",
710 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
711 return ret;
712 }
713
714 return 0;
715 }
716
717 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
718 {
719 unsigned int hscale, vscale;
720 unsigned int maxh, maxw;
721
722 maxw = norm_maxw(dev);
723 maxh = norm_maxh(dev);
724
725 /* width must even because of the YUYV format */
726 /* height must be even because of interlacing */
727 height &= 0xfffe;
728 width &= 0xfffe;
729
730 if (height < 32)
731 height = 32;
732 if (height > maxh)
733 height = maxh;
734 if (width < 48)
735 width = 48;
736 if (width > maxw)
737 width = maxw;
738
739 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
740 hscale = 0x3fff;
741 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
742
743 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
744 vscale = 0x3fff;
745 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
746
747 /* set new image size */
748 dev->width = width;
749 dev->height = height;
750 dev->frame_size = dev->width * dev->height * 2;
751 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
752 dev->bytesperline = dev->width * 2;
753 dev->hscale = hscale;
754 dev->vscale = vscale;
755
756 em28xx_resolution_set(dev);
757
758 return 0;
759 }
760
761 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
762 {
763 em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
764 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
765 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
766 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
767 "V4L2_BUF_TYPE_VBI_CAPTURE" :
768 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
769 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
770 "not supported");
771
772 switch (format->type) {
773 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
774 {
775 format->fmt.pix.width = dev->width;
776 format->fmt.pix.height = dev->height;
777 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
778 format->fmt.pix.bytesperline = dev->bytesperline;
779 format->fmt.pix.sizeimage = dev->frame_size;
780 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
781 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
782
783 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
784 dev->height);
785 break;
786 }
787
788 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
789 {
790 format->fmt.sliced.service_set=0;
791
792 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
793
794 if (format->fmt.sliced.service_set==0)
795 return -EINVAL;
796
797 break;
798 }
799
800 default:
801 return -EINVAL;
802 }
803 return (0);
804 }
805
806 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
807 {
808 u32 i;
809 int ret = 0;
810 int width = format->fmt.pix.width;
811 int height = format->fmt.pix.height;
812 unsigned int hscale, vscale;
813 unsigned int maxh, maxw;
814
815 maxw = norm_maxw(dev);
816 maxh = norm_maxh(dev);
817
818 em28xx_videodbg("%s: type=%s\n",
819 cmd == VIDIOC_TRY_FMT ?
820 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
821 format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
822 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
823 format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
824 "V4L2_BUF_TYPE_VBI_CAPTURE " :
825 "not supported");
826
827 if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
828 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
829
830 if (format->fmt.sliced.service_set==0)
831 return -EINVAL;
832
833 return 0;
834 }
835
836
837 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
838 return -EINVAL;
839
840 em28xx_videodbg("%s: requested %dx%d\n",
841 cmd == VIDIOC_TRY_FMT ?
842 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
843 format->fmt.pix.width, format->fmt.pix.height);
844
845 /* FIXME: Move some code away from here */
846 /* width must even because of the YUYV format */
847 /* height must be even because of interlacing */
848 height &= 0xfffe;
849 width &= 0xfffe;
850
851 if (height < 32)
852 height = 32;
853 if (height > maxh)
854 height = maxh;
855 if (width < 48)
856 width = 48;
857 if (width > maxw)
858 width = maxw;
859
860 if(dev->is_em2800){
861 /* the em2800 can only scale down to 50% */
862 if(height % (maxh / 2))
863 height=maxh;
864 if(width % (maxw / 2))
865 width=maxw;
866 /* according to empiatech support */
867 /* the MaxPacketSize is to small to support */
868 /* framesizes larger than 640x480 @ 30 fps */
869 /* or 640x576 @ 25 fps. As this would cut */
870 /* of a part of the image we prefer */
871 /* 360x576 or 360x480 for now */
872 if(width == maxw && height == maxh)
873 width /= 2;
874 }
875
876 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
877 hscale = 0x3fff;
878
879 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
880
881 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
882 vscale = 0x3fff;
883
884 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
885
886 format->fmt.pix.width = width;
887 format->fmt.pix.height = height;
888 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
889 format->fmt.pix.bytesperline = width * 2;
890 format->fmt.pix.sizeimage = width * 2 * height;
891 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
892 format->fmt.pix.field = V4L2_FIELD_INTERLACED;
893
894 em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
895 cmd == VIDIOC_TRY_FMT ?
896 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
897 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
898
899 if (cmd == VIDIOC_TRY_FMT)
900 return 0;
901
902 for (i = 0; i < dev->num_frames; i++)
903 if (dev->frame[i].vma_use_count) {
904 em28xx_videodbg("VIDIOC_S_FMT failed. "
905 "Unmap the buffers first.\n");
906 return -EINVAL;
907 }
908
909 /* stop io in case it is already in progress */
910 if (dev->stream == STREAM_ON) {
911 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
912 if ((ret = em28xx_stream_interrupt(dev)))
913 return ret;
914 }
915
916 em28xx_release_buffers(dev);
917 dev->io = IO_NONE;
918
919 /* set new image size */
920 dev->width = width;
921 dev->height = height;
922 dev->frame_size = dev->width * dev->height * 2;
923 dev->field_size = dev->frame_size >> 1;
924 dev->bytesperline = dev->width * 2;
925 dev->hscale = hscale;
926 dev->vscale = vscale;
927 em28xx_uninit_isoc(dev);
928 em28xx_set_alternate(dev);
929 em28xx_capture_start(dev, 1);
930 em28xx_resolution_set(dev);
931 em28xx_init_isoc(dev);
932
933 return 0;
934 }
935
936 /*
937 * em28xx_v4l2_do_ioctl()
938 * This function is _not_ called directly, but from
939 * em28xx_v4l2_ioctl. Userspace
940 * copying is done already, arg is a kernel pointer.
941 */
942 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
943 struct em28xx *dev, unsigned int cmd, void *arg,
944 v4l2_kioctl driver_ioctl)
945 {
946 int ret;
947
948 switch (cmd) {
949 /* ---------- tv norms ---------- */
950 case VIDIOC_ENUMSTD:
951 {
952 struct v4l2_standard *e = arg;
953 unsigned int i;
954
955 i = e->index;
956 if (i >= TVNORMS)
957 return -EINVAL;
958 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
959 tvnorms[e->index].name);
960 e->index = i;
961 if (ret < 0)
962 return ret;
963 return 0;
964 }
965 case VIDIOC_G_STD:
966 {
967 v4l2_std_id *id = arg;
968
969 *id = dev->tvnorm->id;
970 return 0;
971 }
972 case VIDIOC_S_STD:
973 {
974 v4l2_std_id *id = arg;
975 unsigned int i;
976
977 for (i = 0; i < TVNORMS; i++)
978 if (*id == tvnorms[i].id)
979 break;
980 if (i == TVNORMS)
981 for (i = 0; i < TVNORMS; i++)
982 if (*id & tvnorms[i].id)
983 break;
984 if (i == TVNORMS)
985 return -EINVAL;
986
987 mutex_lock(&dev->lock);
988 dev->tvnorm = &tvnorms[i];
989
990 em28xx_set_norm(dev, dev->width, dev->height);
991
992 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
993 &dev->tvnorm->id);
994
995 mutex_unlock(&dev->lock);
996
997 return 0;
998 }
999
1000 /* ------ input switching ---------- */
1001 case VIDIOC_ENUMINPUT:
1002 {
1003 struct v4l2_input *i = arg;
1004 unsigned int n;
1005 static const char *iname[] = {
1006 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1007 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1008 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1009 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1010 [EM28XX_VMUX_SVIDEO] = "S-Video",
1011 [EM28XX_VMUX_TELEVISION] = "Television",
1012 [EM28XX_VMUX_CABLE] = "Cable TV",
1013 [EM28XX_VMUX_DVB] = "DVB",
1014 [EM28XX_VMUX_DEBUG] = "for debug only",
1015 };
1016
1017 n = i->index;
1018 if (n >= MAX_EM28XX_INPUT)
1019 return -EINVAL;
1020 if (0 == INPUT(n)->type)
1021 return -EINVAL;
1022 memset(i, 0, sizeof(*i));
1023 i->index = n;
1024 i->type = V4L2_INPUT_TYPE_CAMERA;
1025 strcpy(i->name, iname[INPUT(n)->type]);
1026 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1027 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1028 i->type = V4L2_INPUT_TYPE_TUNER;
1029 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1030 i->std |= tvnorms[n].id;
1031 return 0;
1032 }
1033 case VIDIOC_G_INPUT:
1034 {
1035 int *i = arg;
1036 *i = dev->ctl_input;
1037
1038 return 0;
1039 }
1040 case VIDIOC_S_INPUT:
1041 {
1042 int *index = arg;
1043
1044 if (*index >= MAX_EM28XX_INPUT)
1045 return -EINVAL;
1046 if (0 == INPUT(*index)->type)
1047 return -EINVAL;
1048
1049 mutex_lock(&dev->lock);
1050 video_mux(dev, *index);
1051 mutex_unlock(&dev->lock);
1052
1053 return 0;
1054 }
1055 case VIDIOC_G_AUDIO:
1056 {
1057 struct v4l2_audio *a = arg;
1058 unsigned int index = a->index;
1059
1060 if (a->index > 1)
1061 return -EINVAL;
1062 memset(a, 0, sizeof(*a));
1063 index = dev->ctl_ainput;
1064
1065 if (index == 0) {
1066 strcpy(a->name, "Television");
1067 } else {
1068 strcpy(a->name, "Line In");
1069 }
1070 a->capability = V4L2_AUDCAP_STEREO;
1071 a->index = index;
1072 return 0;
1073 }
1074 case VIDIOC_S_AUDIO:
1075 {
1076 struct v4l2_audio *a = arg;
1077
1078 if (a->index != dev->ctl_ainput)
1079 return -EINVAL;
1080
1081 return 0;
1082 }
1083
1084 /* --- controls ---------------------------------------------- */
1085 case VIDIOC_QUERYCTRL:
1086 {
1087 struct v4l2_queryctrl *qc = arg;
1088 int i, id=qc->id;
1089
1090 memset(qc,0,sizeof(*qc));
1091 qc->id=id;
1092
1093 if (!dev->has_msp34xx) {
1094 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1095 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1096 memcpy(qc, &(em28xx_qctrl[i]),
1097 sizeof(*qc));
1098 return 0;
1099 }
1100 }
1101 }
1102 em28xx_i2c_call_clients(dev,cmd,qc);
1103 if (qc->type)
1104 return 0;
1105 else
1106 return -EINVAL;
1107 }
1108 case VIDIOC_G_CTRL:
1109 {
1110 struct v4l2_control *ctrl = arg;
1111 int retval=-EINVAL;
1112
1113 if (!dev->has_msp34xx)
1114 retval=em28xx_get_ctrl(dev, ctrl);
1115 if (retval==-EINVAL) {
1116 em28xx_i2c_call_clients(dev,cmd,arg);
1117 return 0;
1118 } else return retval;
1119 }
1120 case VIDIOC_S_CTRL:
1121 {
1122 struct v4l2_control *ctrl = arg;
1123 u8 i;
1124
1125 if (!dev->has_msp34xx){
1126 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1127 if (ctrl->id == em28xx_qctrl[i].id) {
1128 if (ctrl->value <
1129 em28xx_qctrl[i].minimum
1130 || ctrl->value >
1131 em28xx_qctrl[i].maximum)
1132 return -ERANGE;
1133 return em28xx_set_ctrl(dev, ctrl);
1134 }
1135 }
1136 }
1137
1138 em28xx_i2c_call_clients(dev,cmd,arg);
1139 return 0;
1140 }
1141 /* --- tuner ioctls ------------------------------------------ */
1142 case VIDIOC_G_TUNER:
1143 {
1144 struct v4l2_tuner *t = arg;
1145
1146 if (0 != t->index)
1147 return -EINVAL;
1148
1149 memset(t, 0, sizeof(*t));
1150 strcpy(t->name, "Tuner");
1151 mutex_lock(&dev->lock);
1152 /* let clients fill in the remainder of this struct */
1153 em28xx_i2c_call_clients(dev, cmd, t);
1154 mutex_unlock(&dev->lock);
1155 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1156 t->afc);
1157 return 0;
1158 }
1159 case VIDIOC_S_TUNER:
1160 {
1161 struct v4l2_tuner *t = arg;
1162
1163 if (0 != t->index)
1164 return -EINVAL;
1165 mutex_lock(&dev->lock);
1166 /* let clients handle this */
1167 em28xx_i2c_call_clients(dev, cmd, t);
1168 mutex_unlock(&dev->lock);
1169 return 0;
1170 }
1171 case VIDIOC_G_FREQUENCY:
1172 {
1173 struct v4l2_frequency *f = arg;
1174
1175 memset(f, 0, sizeof(*f));
1176 f->type = V4L2_TUNER_ANALOG_TV;
1177 f->frequency = dev->ctl_freq;
1178
1179 return 0;
1180 }
1181 case VIDIOC_S_FREQUENCY:
1182 {
1183 struct v4l2_frequency *f = arg;
1184
1185 if (0 != f->tuner)
1186 return -EINVAL;
1187
1188 if (V4L2_TUNER_ANALOG_TV != f->type)
1189 return -EINVAL;
1190
1191 mutex_lock(&dev->lock);
1192 dev->ctl_freq = f->frequency;
1193 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1194 mutex_unlock(&dev->lock);
1195 return 0;
1196 }
1197 case VIDIOC_CROPCAP:
1198 {
1199 struct v4l2_cropcap *cc = arg;
1200
1201 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1202 return -EINVAL;
1203 cc->bounds.left = 0;
1204 cc->bounds.top = 0;
1205 cc->bounds.width = dev->width;
1206 cc->bounds.height = dev->height;
1207 cc->defrect = cc->bounds;
1208 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1209 cc->pixelaspect.denominator = 59;
1210 return 0;
1211 }
1212 case VIDIOC_STREAMON:
1213 {
1214 int *type = arg;
1215
1216 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1217 || dev->io != IO_MMAP)
1218 return -EINVAL;
1219
1220 if (list_empty(&dev->inqueue))
1221 return -EINVAL;
1222
1223 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
1224
1225 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1226
1227 return 0;
1228 }
1229 case VIDIOC_STREAMOFF:
1230 {
1231 int *type = arg;
1232 int ret;
1233
1234 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1235 || dev->io != IO_MMAP)
1236 return -EINVAL;
1237
1238 if (dev->stream == STREAM_ON) {
1239 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1240 if ((ret = em28xx_stream_interrupt(dev)))
1241 return ret;
1242 }
1243 em28xx_empty_framequeues(dev);
1244
1245 return 0;
1246 }
1247 default:
1248 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1249 driver_ioctl);
1250 }
1251 return 0;
1252 }
1253
1254 /*
1255 * em28xx_v4l2_do_ioctl()
1256 * This function is _not_ called directly, but from
1257 * em28xx_v4l2_ioctl. Userspace
1258 * copying is done already, arg is a kernel pointer.
1259 */
1260 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1261 unsigned int cmd, void *arg)
1262 {
1263 struct em28xx *dev = filp->private_data;
1264
1265 if (!dev)
1266 return -ENODEV;
1267
1268 if (video_debug > 1)
1269 v4l_print_ioctl(dev->name,cmd);
1270
1271 switch (cmd) {
1272
1273 /* --- capabilities ------------------------------------------ */
1274 case VIDIOC_QUERYCAP:
1275 {
1276 struct v4l2_capability *cap = arg;
1277
1278 memset(cap, 0, sizeof(*cap));
1279 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1280 strlcpy(cap->card, em28xx_boards[dev->model].name,
1281 sizeof(cap->card));
1282 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1283 sizeof(cap->bus_info));
1284 cap->version = EM28XX_VERSION_CODE;
1285 cap->capabilities =
1286 V4L2_CAP_SLICED_VBI_CAPTURE |
1287 V4L2_CAP_VIDEO_CAPTURE |
1288 V4L2_CAP_AUDIO |
1289 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1290 if (dev->has_tuner)
1291 cap->capabilities |= V4L2_CAP_TUNER;
1292 return 0;
1293 }
1294 /* --- capture ioctls ---------------------------------------- */
1295 case VIDIOC_ENUM_FMT:
1296 {
1297 struct v4l2_fmtdesc *fmtd = arg;
1298
1299 if (fmtd->index != 0)
1300 return -EINVAL;
1301 memset(fmtd, 0, sizeof(*fmtd));
1302 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1303 strcpy(fmtd->description, "Packed YUY2");
1304 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1305 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1306 return 0;
1307 }
1308 case VIDIOC_G_FMT:
1309 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1310
1311 case VIDIOC_TRY_FMT:
1312 case VIDIOC_S_FMT:
1313 return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1314
1315 case VIDIOC_REQBUFS:
1316 {
1317 struct v4l2_requestbuffers *rb = arg;
1318 u32 i;
1319 int ret;
1320
1321 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1322 rb->memory != V4L2_MEMORY_MMAP)
1323 return -EINVAL;
1324
1325 if (dev->io == IO_READ) {
1326 em28xx_videodbg ("method is set to read;"
1327 " close and open the device again to"
1328 " choose the mmap I/O method\n");
1329 return -EINVAL;
1330 }
1331
1332 for (i = 0; i < dev->num_frames; i++)
1333 if (dev->frame[i].vma_use_count) {
1334 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1335 return -EINVAL;
1336 }
1337
1338 if (dev->stream == STREAM_ON) {
1339 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1340 if ((ret = em28xx_stream_interrupt(dev)))
1341 return ret;
1342 }
1343
1344 em28xx_empty_framequeues(dev);
1345
1346 em28xx_release_buffers(dev);
1347 if (rb->count)
1348 rb->count =
1349 em28xx_request_buffers(dev, rb->count);
1350
1351 dev->frame_current = NULL;
1352
1353 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1354 rb->count);
1355 dev->io = rb->count ? IO_MMAP : IO_NONE;
1356 return 0;
1357 }
1358 case VIDIOC_QUERYBUF:
1359 {
1360 struct v4l2_buffer *b = arg;
1361
1362 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1363 b->index >= dev->num_frames || dev->io != IO_MMAP)
1364 return -EINVAL;
1365
1366 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1367
1368 if (dev->frame[b->index].vma_use_count) {
1369 b->flags |= V4L2_BUF_FLAG_MAPPED;
1370 }
1371 if (dev->frame[b->index].state == F_DONE)
1372 b->flags |= V4L2_BUF_FLAG_DONE;
1373 else if (dev->frame[b->index].state != F_UNUSED)
1374 b->flags |= V4L2_BUF_FLAG_QUEUED;
1375 return 0;
1376 }
1377 case VIDIOC_QBUF:
1378 {
1379 struct v4l2_buffer *b = arg;
1380 unsigned long lock_flags;
1381
1382 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1383 b->index >= dev->num_frames || dev->io != IO_MMAP) {
1384 return -EINVAL;
1385 }
1386
1387 if (dev->frame[b->index].state != F_UNUSED) {
1388 return -EAGAIN;
1389 }
1390 dev->frame[b->index].state = F_QUEUED;
1391
1392 /* add frame to fifo */
1393 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1394 list_add_tail(&dev->frame[b->index].frame,
1395 &dev->inqueue);
1396 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1397
1398 return 0;
1399 }
1400 case VIDIOC_DQBUF:
1401 {
1402 struct v4l2_buffer *b = arg;
1403 struct em28xx_frame_t *f;
1404 unsigned long lock_flags;
1405 int ret = 0;
1406
1407 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1408 || dev->io != IO_MMAP)
1409 return -EINVAL;
1410
1411 if (list_empty(&dev->outqueue)) {
1412 if (dev->stream == STREAM_OFF)
1413 return -EINVAL;
1414 if (filp->f_flags & O_NONBLOCK)
1415 return -EAGAIN;
1416 ret = wait_event_interruptible
1417 (dev->wait_frame,
1418 (!list_empty(&dev->outqueue)) ||
1419 (dev->state & DEV_DISCONNECTED));
1420 if (ret)
1421 return ret;
1422 if (dev->state & DEV_DISCONNECTED)
1423 return -ENODEV;
1424 }
1425
1426 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1427 f = list_entry(dev->outqueue.next,
1428 struct em28xx_frame_t, frame);
1429 list_del(dev->outqueue.next);
1430 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1431
1432 f->state = F_UNUSED;
1433 memcpy(b, &f->buf, sizeof(*b));
1434
1435 if (f->vma_use_count)
1436 b->flags |= V4L2_BUF_FLAG_MAPPED;
1437
1438 return 0;
1439 }
1440 default:
1441 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1442 em28xx_video_do_ioctl);
1443 }
1444 return 0;
1445 }
1446
1447 /*
1448 * em28xx_v4l2_ioctl()
1449 * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1450 */
1451 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1452 unsigned int cmd, unsigned long arg)
1453 {
1454 int ret = 0;
1455 struct em28xx *dev = filp->private_data;
1456
1457 if (mutex_lock_interruptible(&dev->fileop_lock))
1458 return -ERESTARTSYS;
1459
1460 if (dev->state & DEV_DISCONNECTED) {
1461 em28xx_errdev("v4l2 ioctl: device not present\n");
1462 mutex_unlock(&dev->fileop_lock);
1463 return -ENODEV;
1464 }
1465
1466 if (dev->state & DEV_MISCONFIGURED) {
1467 em28xx_errdev
1468 ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1469 mutex_unlock(&dev->fileop_lock);
1470 return -EIO;
1471 }
1472
1473 ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1474
1475 mutex_unlock(&dev->fileop_lock);
1476
1477 return ret;
1478 }
1479
1480 static const struct file_operations em28xx_v4l_fops = {
1481 .owner = THIS_MODULE,
1482 .open = em28xx_v4l2_open,
1483 .release = em28xx_v4l2_close,
1484 .ioctl = em28xx_v4l2_ioctl,
1485 .read = em28xx_v4l2_read,
1486 .poll = em28xx_v4l2_poll,
1487 .mmap = em28xx_v4l2_mmap,
1488 .llseek = no_llseek,
1489 .compat_ioctl = v4l_compat_ioctl32,
1490
1491 };
1492
1493 /******************************** usb interface *****************************************/
1494
1495 /*
1496 * em28xx_init_dev()
1497 * allocates and inits the device structs, registers i2c bus and v4l device
1498 */
1499 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1500 int minor, int model)
1501 {
1502 struct em28xx *dev = *devhandle;
1503 int retval = -ENOMEM;
1504 int errCode, i;
1505 unsigned int maxh, maxw;
1506
1507 dev->udev = udev;
1508 dev->model = model;
1509 mutex_init(&dev->lock);
1510 init_waitqueue_head(&dev->open);
1511
1512 dev->em28xx_write_regs = em28xx_write_regs;
1513 dev->em28xx_read_reg = em28xx_read_reg;
1514 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1515 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1516 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1517 dev->is_em2800 = em28xx_boards[model].is_em2800;
1518 dev->has_tuner = em28xx_boards[model].has_tuner;
1519 dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1520 dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1521 dev->decoder = em28xx_boards[model].decoder;
1522
1523 if (tuner >= 0)
1524 dev->tuner_type = tuner;
1525 else
1526 dev->tuner_type = em28xx_boards[model].tuner_type;
1527
1528 dev->video_inputs = em28xx_boards[model].vchannels;
1529
1530 for (i = 0; i < TVNORMS; i++)
1531 if (em28xx_boards[model].norm == tvnorms[i].mode)
1532 break;
1533 if (i == TVNORMS)
1534 i = 0;
1535
1536 dev->tvnorm = &tvnorms[i]; /* set default norm */
1537
1538 em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1539
1540 maxw = norm_maxw(dev);
1541 maxh = norm_maxh(dev);
1542
1543 /* set default image size */
1544 dev->width = maxw;
1545 dev->height = maxh;
1546 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1547 dev->field_size = dev->width * dev->height;
1548 dev->frame_size =
1549 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1550 dev->bytesperline = dev->width * 2;
1551 dev->hscale = 0;
1552 dev->vscale = 0;
1553 dev->ctl_input = 2;
1554
1555 /* setup video picture settings for saa7113h */
1556 memset(&dev->vpic, 0, sizeof(dev->vpic));
1557 dev->vpic.colour = 128 << 8;
1558 dev->vpic.hue = 128 << 8;
1559 dev->vpic.brightness = 128 << 8;
1560 dev->vpic.contrast = 192 << 8;
1561 dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1562 dev->vpic.depth = 16;
1563 dev->vpic.palette = VIDEO_PALETTE_YUV422;
1564
1565 em28xx_pre_card_setup(dev);
1566 #ifdef CONFIG_MODULES
1567 /* request some modules */
1568 if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1569 request_module("saa7115");
1570 if (dev->decoder == EM28XX_TVP5150)
1571 request_module("tvp5150");
1572 if (dev->has_tuner)
1573 request_module("tuner");
1574 #endif
1575 errCode = em28xx_config(dev);
1576 if (errCode) {
1577 em28xx_errdev("error configuring device\n");
1578 em28xx_devused&=~(1<<dev->devno);
1579 kfree(dev);
1580 return -ENOMEM;
1581 }
1582
1583 mutex_lock(&dev->lock);
1584 /* register i2c bus */
1585 em28xx_i2c_register(dev);
1586
1587 /* Do board specific init and eeprom reading */
1588 em28xx_card_setup(dev);
1589
1590 /* configure the device */
1591 em28xx_config_i2c(dev);
1592
1593 mutex_unlock(&dev->lock);
1594
1595 errCode = em28xx_config(dev);
1596
1597 #ifdef CONFIG_MODULES
1598 if (dev->has_msp34xx)
1599 request_module("msp3400");
1600 #endif
1601 /* allocate and fill v4l2 device struct */
1602 dev->vdev = video_device_alloc();
1603 if (NULL == dev->vdev) {
1604 em28xx_errdev("cannot allocate video_device.\n");
1605 em28xx_devused&=~(1<<dev->devno);
1606 kfree(dev);
1607 return -ENOMEM;
1608 }
1609
1610 dev->vbi_dev = video_device_alloc();
1611 if (NULL == dev->vbi_dev) {
1612 em28xx_errdev("cannot allocate video_device.\n");
1613 kfree(dev->vdev);
1614 em28xx_devused&=~(1<<dev->devno);
1615 kfree(dev);
1616 return -ENOMEM;
1617 }
1618
1619 /* Fills VBI device info */
1620 dev->vbi_dev->type = VFL_TYPE_VBI;
1621 dev->vbi_dev->fops = &em28xx_v4l_fops;
1622 dev->vbi_dev->minor = -1;
1623 dev->vbi_dev->dev = &dev->udev->dev;
1624 dev->vbi_dev->release = video_device_release;
1625 snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1626 "em28xx",dev->devno,"vbi");
1627
1628 /* Fills CAPTURE device info */
1629 dev->vdev->type = VID_TYPE_CAPTURE;
1630 if (dev->has_tuner)
1631 dev->vdev->type |= VID_TYPE_TUNER;
1632 dev->vdev->fops = &em28xx_v4l_fops;
1633 dev->vdev->minor = -1;
1634 dev->vdev->dev = &dev->udev->dev;
1635 dev->vdev->release = video_device_release;
1636 snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1637 "em28xx",dev->devno,"video");
1638
1639 list_add_tail(&dev->devlist,&em28xx_devlist);
1640
1641 /* register v4l2 device */
1642 mutex_lock(&dev->lock);
1643 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1644 video_nr[dev->devno]))) {
1645 em28xx_errdev("unable to register video device (error=%i).\n",
1646 retval);
1647 mutex_unlock(&dev->lock);
1648 list_del(&dev->devlist);
1649 video_device_release(dev->vdev);
1650 em28xx_devused&=~(1<<dev->devno);
1651 kfree(dev);
1652 return -ENODEV;
1653 }
1654
1655 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1656 vbi_nr[dev->devno]) < 0) {
1657 printk("unable to register vbi device\n");
1658 mutex_unlock(&dev->lock);
1659 list_del(&dev->devlist);
1660 video_device_release(dev->vbi_dev);
1661 video_device_release(dev->vdev);
1662 em28xx_devused&=~(1<<dev->devno);
1663 kfree(dev);
1664 return -ENODEV;
1665 } else {
1666 printk("registered VBI\n");
1667 }
1668
1669 if (dev->has_msp34xx) {
1670 /* Send a reset to other chips via gpio */
1671 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1672 msleep(3);
1673 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1674 msleep(3);
1675
1676 }
1677 video_mux(dev, 0);
1678
1679 mutex_unlock(&dev->lock);
1680
1681 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1682 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1683 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1684
1685 return 0;
1686 }
1687
1688 /*
1689 * em28xx_usb_probe()
1690 * checks for supported devices
1691 */
1692 static int em28xx_usb_probe(struct usb_interface *interface,
1693 const struct usb_device_id *id)
1694 {
1695 const struct usb_endpoint_descriptor *endpoint;
1696 struct usb_device *udev;
1697 struct usb_interface *uif;
1698 struct em28xx *dev = NULL;
1699 int retval = -ENODEV;
1700 int model,i,nr,ifnum;
1701
1702 udev = usb_get_dev(interface_to_usbdev(interface));
1703 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1704
1705 /* Check to see next free device and mark as used */
1706 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1707 em28xx_devused|=1<<nr;
1708
1709 /* Don't register audio interfaces */
1710 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1711 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1712 udev->descriptor.idVendor,udev->descriptor.idProduct,
1713 ifnum,
1714 interface->altsetting[0].desc.bInterfaceClass);
1715
1716 em28xx_devused&=~(1<<nr);
1717 return -ENODEV;
1718 }
1719
1720 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1721 udev->descriptor.idVendor,udev->descriptor.idProduct,
1722 ifnum,
1723 interface->altsetting[0].desc.bInterfaceClass);
1724
1725 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1726
1727 /* check if the device has the iso in endpoint at the correct place */
1728 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1729 USB_ENDPOINT_XFER_ISOC) {
1730 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1731 em28xx_devused&=~(1<<nr);
1732 return -ENODEV;
1733 }
1734 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1735 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1736 em28xx_devused&=~(1<<nr);
1737 return -ENODEV;
1738 }
1739
1740 model=id->driver_info;
1741
1742 if (nr >= EM28XX_MAXBOARDS) {
1743 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1744 em28xx_devused&=~(1<<nr);
1745 return -ENOMEM;
1746 }
1747
1748 /* allocate memory for our device state and initialize it */
1749 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1750 if (dev == NULL) {
1751 em28xx_err(DRIVER_NAME ": out of memory!\n");
1752 em28xx_devused&=~(1<<nr);
1753 return -ENOMEM;
1754 }
1755
1756 snprintf(dev->name, 29, "em28xx #%d", nr);
1757 dev->devno=nr;
1758
1759 /* compute alternate max packet sizes */
1760 uif = udev->actconfig->interface[0];
1761
1762 dev->num_alt=uif->num_altsetting;
1763 em28xx_info("Alternate settings: %i\n",dev->num_alt);
1764 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1765 dev->alt_max_pkt_size = kmalloc(32*
1766 dev->num_alt,GFP_KERNEL);
1767 if (dev->alt_max_pkt_size == NULL) {
1768 em28xx_errdev("out of memory!\n");
1769 em28xx_devused&=~(1<<nr);
1770 kfree(dev);
1771 return -ENOMEM;
1772 }
1773
1774 for (i = 0; i < dev->num_alt ; i++) {
1775 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1776 wMaxPacketSize);
1777 dev->alt_max_pkt_size[i] =
1778 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1779 em28xx_info("Alternate setting %i, max size= %i\n",i,
1780 dev->alt_max_pkt_size[i]);
1781 }
1782
1783 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1784 model=card[nr];
1785
1786 if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1787 em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
1788 "%s: be autodetected. Please pass card=<n> insmod option to\n"
1789 "%s: workaround that. Redirect complaints to the vendor of\n"
1790 "%s: the TV card. Generic type will be used."
1791 "%s: Best regards,\n"
1792 "%s: -- tux\n",
1793 dev->name,dev->name,dev->name,dev->name,dev->name);
1794 em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1795 dev->name);
1796 for (i = 0; i < em28xx_bcount; i++) {
1797 em28xx_errdev(" card=%d -> %s\n", i,
1798 em28xx_boards[i].name);
1799 }
1800 }
1801
1802 /* allocate device struct */
1803 retval = em28xx_init_dev(&dev, udev, nr, model);
1804 if (retval)
1805 return retval;
1806
1807 em28xx_info("Found %s\n", em28xx_boards[model].name);
1808
1809 /* save our data pointer in this interface device */
1810 usb_set_intfdata(interface, dev);
1811 return 0;
1812 }
1813
1814 /*
1815 * em28xx_usb_disconnect()
1816 * called when the device gets diconencted
1817 * video device will be unregistered on v4l2_close in case it is still open
1818 */
1819 static void em28xx_usb_disconnect(struct usb_interface *interface)
1820 {
1821 struct em28xx *dev = usb_get_intfdata(interface);
1822 usb_set_intfdata(interface, NULL);
1823
1824 if (!dev)
1825 return;
1826
1827 down_write(&em28xx_disconnect);
1828
1829 mutex_lock(&dev->lock);
1830
1831 em28xx_info("disconnecting %s\n", dev->vdev->name);
1832
1833 wake_up_interruptible_all(&dev->open);
1834
1835 if (dev->users) {
1836 em28xx_warn
1837 ("device /dev/video%d is open! Deregistration and memory "
1838 "deallocation are deferred on close.\n",
1839 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1840
1841 dev->state |= DEV_MISCONFIGURED;
1842 em28xx_uninit_isoc(dev);
1843 dev->state |= DEV_DISCONNECTED;
1844 wake_up_interruptible(&dev->wait_frame);
1845 wake_up_interruptible(&dev->wait_stream);
1846 } else {
1847 dev->state |= DEV_DISCONNECTED;
1848 em28xx_release_resources(dev);
1849 }
1850
1851 mutex_unlock(&dev->lock);
1852
1853 if (!dev->users) {
1854 kfree(dev->alt_max_pkt_size);
1855 kfree(dev);
1856 }
1857
1858 up_write(&em28xx_disconnect);
1859 }
1860
1861 static struct usb_driver em28xx_usb_driver = {
1862 .name = "em28xx",
1863 .probe = em28xx_usb_probe,
1864 .disconnect = em28xx_usb_disconnect,
1865 .id_table = em28xx_id_table,
1866 };
1867
1868 static int __init em28xx_module_init(void)
1869 {
1870 int result;
1871
1872 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1873 (EM28XX_VERSION_CODE >> 16) & 0xff,
1874 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1875 #ifdef SNAPSHOT
1876 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1877 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1878 #endif
1879
1880 /* register this driver with the USB subsystem */
1881 result = usb_register(&em28xx_usb_driver);
1882 if (result)
1883 em28xx_err(DRIVER_NAME
1884 " usb_register failed. Error number %d.\n", result);
1885
1886 return result;
1887 }
1888
1889 static void __exit em28xx_module_exit(void)
1890 {
1891 /* deregister this driver with the USB subsystem */
1892 usb_deregister(&em28xx_usb_driver);
1893 }
1894
1895 module_init(em28xx_module_init);
1896 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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