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V4L/DVB (6005): Initialize filp->private_data only once in em28xx_v4l2_open
[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/video_decoder.h>
36 #include <linux/mutex.h>
37
38 #include "em28xx.h"
39 #include <media/tuner.h>
40 #include <media/v4l2-common.h>
41 #include <media/msp3400.h>
42
43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
44 "Markus Rechberger <mrechberger@gmail.com>, " \
45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
46 "Sascha Sommer <saschasommer@freenet.de>"
47
48 #define DRIVER_NAME "em28xx"
49 #define DRIVER_DESC "Empia em28xx based USB video device driver"
50 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1)
51
52 #define em28xx_videodbg(fmt, arg...) do {\
53 if (video_debug) \
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __FUNCTION__ , ##arg); } while (0)
56
57 MODULE_AUTHOR(DRIVER_AUTHOR);
58 MODULE_DESCRIPTION(DRIVER_DESC);
59 MODULE_LICENSE("GPL");
60
61 static LIST_HEAD(em28xx_devlist);
62
63 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66 module_param_array(card, int, NULL, 0444);
67 module_param_array(video_nr, int, NULL, 0444);
68 module_param_array(vbi_nr, int, NULL, 0444);
69 MODULE_PARM_DESC(card,"card type");
70 MODULE_PARM_DESC(video_nr,"video device numbers");
71 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
72
73 static int tuner = -1;
74 module_param(tuner, int, 0444);
75 MODULE_PARM_DESC(tuner, "tuner type");
76
77 static unsigned int video_debug = 0;
78 module_param(video_debug,int,0644);
79 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
80
81 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
82 static unsigned long em28xx_devused;
83
84 /* supported tv norms */
85 static struct em28xx_tvnorm tvnorms[] = {
86 {
87 .name = "PAL",
88 .id = V4L2_STD_PAL,
89 .mode = VIDEO_MODE_PAL,
90 }, {
91 .name = "NTSC",
92 .id = V4L2_STD_NTSC,
93 .mode = VIDEO_MODE_NTSC,
94 }, {
95 .name = "SECAM",
96 .id = V4L2_STD_SECAM,
97 .mode = VIDEO_MODE_SECAM,
98 }, {
99 .name = "PAL-M",
100 .id = V4L2_STD_PAL_M,
101 .mode = VIDEO_MODE_PAL,
102 }
103 };
104
105 #define TVNORMS ARRAY_SIZE(tvnorms)
106
107 /* supported controls */
108 /* Common to all boards */
109 static struct v4l2_queryctrl em28xx_qctrl[] = {
110 {
111 .id = V4L2_CID_AUDIO_VOLUME,
112 .type = V4L2_CTRL_TYPE_INTEGER,
113 .name = "Volume",
114 .minimum = 0x0,
115 .maximum = 0x1f,
116 .step = 0x1,
117 .default_value = 0x1f,
118 .flags = 0,
119 },{
120 .id = V4L2_CID_AUDIO_MUTE,
121 .type = V4L2_CTRL_TYPE_BOOLEAN,
122 .name = "Mute",
123 .minimum = 0,
124 .maximum = 1,
125 .step = 1,
126 .default_value = 1,
127 .flags = 0,
128 }
129 };
130
131 static struct usb_driver em28xx_usb_driver;
132
133 static DEFINE_MUTEX(em28xx_sysfs_lock);
134 static DECLARE_RWSEM(em28xx_disconnect);
135
136 /********************* v4l2 interface ******************************************/
137
138 /*
139 * em28xx_config()
140 * inits registers with sane defaults
141 */
142 static int em28xx_config(struct em28xx *dev)
143 {
144
145 /* Sets I2C speed to 100 KHz */
146 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
147
148 /* enable vbi capturing */
149
150 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
151 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
152 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
153
154 em28xx_audio_usb_mute(dev, 1);
155 dev->mute = 1; /* maybe not the right place... */
156 dev->volume = 0x1f;
157 em28xx_audio_analog_set(dev);
158 em28xx_audio_analog_setup(dev);
159 em28xx_outfmt_set_yuv422(dev);
160 em28xx_colorlevels_set_default(dev);
161 em28xx_compression_disable(dev);
162
163 return 0;
164 }
165
166 /*
167 * em28xx_config_i2c()
168 * configure i2c attached devices
169 */
170 static void em28xx_config_i2c(struct em28xx *dev)
171 {
172 struct v4l2_frequency f;
173 struct v4l2_routing route;
174
175 route.input = INPUT(dev->ctl_input)->vmux;
176 route.output = 0;
177 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
178 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
179 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
180
181 /* configure tuner */
182 f.tuner = 0;
183 f.type = V4L2_TUNER_ANALOG_TV;
184 f.frequency = 9076; /* FIXME:remove magic number */
185 dev->ctl_freq = f.frequency;
186 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
187
188 /* configure tda9887 */
189
190
191 /* em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
192 }
193
194 /*
195 * em28xx_empty_framequeues()
196 * prepare queues for incoming and outgoing frames
197 */
198 static void em28xx_empty_framequeues(struct em28xx *dev)
199 {
200 u32 i;
201
202 INIT_LIST_HEAD(&dev->inqueue);
203 INIT_LIST_HEAD(&dev->outqueue);
204
205 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
206 dev->frame[i].state = F_UNUSED;
207 dev->frame[i].buf.bytesused = 0;
208 }
209 }
210
211 static void video_mux(struct em28xx *dev, int index)
212 {
213 int ainput;
214 struct v4l2_routing route;
215
216 route.input = INPUT(index)->vmux;
217 route.output = 0;
218 dev->ctl_input = index;
219 dev->ctl_ainput = INPUT(index)->amux;
220
221 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
222
223 em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
224
225 if (dev->has_msp34xx) {
226 if (dev->i2s_speed)
227 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
228 route.input = dev->ctl_ainput;
229 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
230 /* Note: this is msp3400 specific */
231 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
232 ainput = EM28XX_AUDIO_SRC_TUNER;
233 em28xx_audio_source(dev, ainput);
234 } else {
235 switch (dev->ctl_ainput) {
236 case 0:
237 ainput = EM28XX_AUDIO_SRC_TUNER;
238 break;
239 default:
240 ainput = EM28XX_AUDIO_SRC_LINE;
241 }
242 em28xx_audio_source(dev, ainput);
243 }
244 }
245
246 /*
247 * em28xx_v4l2_open()
248 * inits the device and starts isoc transfer
249 */
250 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
251 {
252 int minor = iminor(inode);
253 int errCode = 0;
254 struct em28xx *h,*dev = NULL;
255 struct list_head *list;
256
257 list_for_each(list,&em28xx_devlist) {
258 h = list_entry(list, struct em28xx, devlist);
259 if (h->vdev->minor == minor) {
260 dev = h;
261 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
262 }
263 if (h->vbi_dev->minor == minor) {
264 dev = h;
265 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
266 }
267 }
268 if (NULL == dev)
269 return -ENODEV;
270
271 em28xx_videodbg("open minor=%d type=%s users=%d\n",
272 minor,v4l2_type_names[dev->type],dev->users);
273
274 if (!down_read_trylock(&em28xx_disconnect))
275 return -ERESTARTSYS;
276
277 if (dev->users) {
278 em28xx_warn("this driver can be opened only once\n");
279 up_read(&em28xx_disconnect);
280 return -EBUSY;
281 }
282
283 mutex_init(&dev->fileop_lock); /* to 1 == available */
284 spin_lock_init(&dev->queue_lock);
285 init_waitqueue_head(&dev->wait_frame);
286 init_waitqueue_head(&dev->wait_stream);
287
288 mutex_lock(&dev->lock);
289
290 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
291 em28xx_set_alternate(dev);
292
293 dev->width = norm_maxw(dev);
294 dev->height = norm_maxh(dev);
295 dev->frame_size = dev->width * dev->height * 2;
296 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
297 dev->bytesperline = dev->width * 2;
298 dev->hscale = 0;
299 dev->vscale = 0;
300
301 em28xx_capture_start(dev, 1);
302 em28xx_resolution_set(dev);
303
304 /* device needs to be initialized before isoc transfer */
305 video_mux(dev, 0);
306
307 /* start the transfer */
308 errCode = em28xx_init_isoc(dev);
309 if (errCode)
310 goto err;
311
312 }
313
314 dev->users++;
315 filp->private_data = dev;
316 dev->io = IO_NONE;
317 dev->stream = STREAM_OFF;
318 dev->num_frames = 0;
319
320 /* prepare queues */
321 em28xx_empty_framequeues(dev);
322
323 dev->state |= DEV_INITIALIZED;
324
325 err:
326 mutex_unlock(&dev->lock);
327 up_read(&em28xx_disconnect);
328 return errCode;
329 }
330
331 /*
332 * em28xx_realease_resources()
333 * unregisters the v4l2,i2c and usb devices
334 * called when the device gets disconected or at module unload
335 */
336 static void em28xx_release_resources(struct em28xx *dev)
337 {
338 mutex_lock(&em28xx_sysfs_lock);
339
340 /*FIXME: I2C IR should be disconnected */
341
342 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
343 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
344 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
345 list_del(&dev->devlist);
346 video_unregister_device(dev->vdev);
347 video_unregister_device(dev->vbi_dev);
348 em28xx_i2c_unregister(dev);
349 usb_put_dev(dev->udev);
350 mutex_unlock(&em28xx_sysfs_lock);
351
352
353 /* Mark device as unused */
354 em28xx_devused&=~(1<<dev->devno);
355 }
356
357 /*
358 * em28xx_v4l2_close()
359 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
360 */
361 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
362 {
363 int errCode;
364 struct em28xx *dev=filp->private_data;
365
366 em28xx_videodbg("users=%d\n", dev->users);
367
368 mutex_lock(&dev->lock);
369
370 em28xx_uninit_isoc(dev);
371
372 em28xx_release_buffers(dev);
373
374 /* the device is already disconnect, free the remaining resources */
375 if (dev->state & DEV_DISCONNECTED) {
376 em28xx_release_resources(dev);
377 mutex_unlock(&dev->lock);
378 kfree(dev);
379 return 0;
380 }
381
382 /* set alternate 0 */
383 dev->alt = 0;
384 em28xx_videodbg("setting alternate 0\n");
385 errCode = usb_set_interface(dev->udev, 0, 0);
386 if (errCode < 0) {
387 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
388 errCode);
389 }
390
391 dev->users--;
392 wake_up_interruptible_nr(&dev->open, 1);
393 mutex_unlock(&dev->lock);
394 return 0;
395 }
396
397 /*
398 * em28xx_v4l2_read()
399 * will allocate buffers when called for the first time
400 */
401 static ssize_t
402 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
403 loff_t * f_pos)
404 {
405 struct em28xx_frame_t *f, *i;
406 unsigned long lock_flags;
407 int ret = 0;
408 struct em28xx *dev = filp->private_data;
409
410 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
411 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
412 }
413 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
414 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
415 em28xx_videodbg("not supported yet! ...\n");
416 if (copy_to_user(buf, "", 1)) {
417 mutex_unlock(&dev->fileop_lock);
418 return -EFAULT;
419 }
420 return (1);
421 }
422 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
423 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
424 em28xx_videodbg("not supported yet! ...\n");
425 if (copy_to_user(buf, "", 1)) {
426 mutex_unlock(&dev->fileop_lock);
427 return -EFAULT;
428 }
429 return (1);
430 }
431
432 if (mutex_lock_interruptible(&dev->fileop_lock))
433 return -ERESTARTSYS;
434
435 if (dev->state & DEV_DISCONNECTED) {
436 em28xx_videodbg("device not present\n");
437 mutex_unlock(&dev->fileop_lock);
438 return -ENODEV;
439 }
440
441 if (dev->state & DEV_MISCONFIGURED) {
442 em28xx_videodbg("device misconfigured; close and open it again\n");
443 mutex_unlock(&dev->fileop_lock);
444 return -EIO;
445 }
446
447 if (dev->io == IO_MMAP) {
448 em28xx_videodbg ("IO method is set to mmap; close and open"
449 " the device again to choose the read method\n");
450 mutex_unlock(&dev->fileop_lock);
451 return -EINVAL;
452 }
453
454 if (dev->io == IO_NONE) {
455 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
456 em28xx_errdev("read failed, not enough memory\n");
457 mutex_unlock(&dev->fileop_lock);
458 return -ENOMEM;
459 }
460 dev->io = IO_READ;
461 dev->stream = STREAM_ON;
462 em28xx_queue_unusedframes(dev);
463 }
464
465 if (!count) {
466 mutex_unlock(&dev->fileop_lock);
467 return 0;
468 }
469
470 if (list_empty(&dev->outqueue)) {
471 if (filp->f_flags & O_NONBLOCK) {
472 mutex_unlock(&dev->fileop_lock);
473 return -EAGAIN;
474 }
475 ret = wait_event_interruptible
476 (dev->wait_frame,
477 (!list_empty(&dev->outqueue)) ||
478 (dev->state & DEV_DISCONNECTED));
479 if (ret) {
480 mutex_unlock(&dev->fileop_lock);
481 return ret;
482 }
483 if (dev->state & DEV_DISCONNECTED) {
484 mutex_unlock(&dev->fileop_lock);
485 return -ENODEV;
486 }
487 }
488
489 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
490
491 spin_lock_irqsave(&dev->queue_lock, lock_flags);
492 list_for_each_entry(i, &dev->outqueue, frame)
493 i->state = F_UNUSED;
494 INIT_LIST_HEAD(&dev->outqueue);
495 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
496
497 em28xx_queue_unusedframes(dev);
498
499 if (count > f->buf.length)
500 count = f->buf.length;
501
502 if (copy_to_user(buf, f->bufmem, count)) {
503 mutex_unlock(&dev->fileop_lock);
504 return -EFAULT;
505 }
506 *f_pos += count;
507
508 mutex_unlock(&dev->fileop_lock);
509
510 return count;
511 }
512
513 /*
514 * em28xx_v4l2_poll()
515 * will allocate buffers when called for the first time
516 */
517 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
518 {
519 unsigned int mask = 0;
520 struct em28xx *dev = filp->private_data;
521
522 if (mutex_lock_interruptible(&dev->fileop_lock))
523 return POLLERR;
524
525 if (dev->state & DEV_DISCONNECTED) {
526 em28xx_videodbg("device not present\n");
527 } else if (dev->state & DEV_MISCONFIGURED) {
528 em28xx_videodbg("device is misconfigured; close and open it again\n");
529 } else {
530 if (dev->io == IO_NONE) {
531 if (!em28xx_request_buffers
532 (dev, EM28XX_NUM_READ_FRAMES)) {
533 em28xx_warn
534 ("poll() failed, not enough memory\n");
535 } else {
536 dev->io = IO_READ;
537 dev->stream = STREAM_ON;
538 }
539 }
540
541 if (dev->io == IO_READ) {
542 em28xx_queue_unusedframes(dev);
543 poll_wait(filp, &dev->wait_frame, wait);
544
545 if (!list_empty(&dev->outqueue))
546 mask |= POLLIN | POLLRDNORM;
547
548 mutex_unlock(&dev->fileop_lock);
549
550 return mask;
551 }
552 }
553
554 mutex_unlock(&dev->fileop_lock);
555 return POLLERR;
556 }
557
558 /*
559 * em28xx_vm_open()
560 */
561 static void em28xx_vm_open(struct vm_area_struct *vma)
562 {
563 struct em28xx_frame_t *f = vma->vm_private_data;
564 f->vma_use_count++;
565 }
566
567 /*
568 * em28xx_vm_close()
569 */
570 static void em28xx_vm_close(struct vm_area_struct *vma)
571 {
572 /* NOTE: buffers are not freed here */
573 struct em28xx_frame_t *f = vma->vm_private_data;
574 f->vma_use_count--;
575 }
576
577 static struct vm_operations_struct em28xx_vm_ops = {
578 .open = em28xx_vm_open,
579 .close = em28xx_vm_close,
580 };
581
582 /*
583 * em28xx_v4l2_mmap()
584 */
585 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
586 {
587 unsigned long size = vma->vm_end - vma->vm_start,
588 start = vma->vm_start;
589 void *pos;
590 u32 i;
591
592 struct em28xx *dev = filp->private_data;
593
594 if (mutex_lock_interruptible(&dev->fileop_lock))
595 return -ERESTARTSYS;
596
597 if (dev->state & DEV_DISCONNECTED) {
598 em28xx_videodbg("mmap: device not present\n");
599 mutex_unlock(&dev->fileop_lock);
600 return -ENODEV;
601 }
602
603 if (dev->state & DEV_MISCONFIGURED) {
604 em28xx_videodbg ("mmap: Device is misconfigured; close and "
605 "open it again\n");
606 mutex_unlock(&dev->fileop_lock);
607 return -EIO;
608 }
609
610 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
611 size != PAGE_ALIGN(dev->frame[0].buf.length)) {
612 mutex_unlock(&dev->fileop_lock);
613 return -EINVAL;
614 }
615
616 for (i = 0; i < dev->num_frames; i++) {
617 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
618 break;
619 }
620 if (i == dev->num_frames) {
621 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
622 mutex_unlock(&dev->fileop_lock);
623 return -EINVAL;
624 }
625
626 /* VM_IO is eventually going to replace PageReserved altogether */
627 vma->vm_flags |= VM_IO;
628 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
629
630 pos = dev->frame[i].bufmem;
631 while (size > 0) { /* size is page-aligned */
632 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
633 em28xx_videodbg("mmap: vm_insert_page failed\n");
634 mutex_unlock(&dev->fileop_lock);
635 return -EAGAIN;
636 }
637 start += PAGE_SIZE;
638 pos += PAGE_SIZE;
639 size -= PAGE_SIZE;
640 }
641
642 vma->vm_ops = &em28xx_vm_ops;
643 vma->vm_private_data = &dev->frame[i];
644
645 em28xx_vm_open(vma);
646 mutex_unlock(&dev->fileop_lock);
647 return 0;
648 }
649
650 /*
651 * em28xx_get_ctrl()
652 * return the current saturation, brightness or contrast, mute state
653 */
654 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
655 {
656 switch (ctrl->id) {
657 case V4L2_CID_AUDIO_MUTE:
658 ctrl->value = dev->mute;
659 return 0;
660 case V4L2_CID_AUDIO_VOLUME:
661 ctrl->value = dev->volume;
662 return 0;
663 default:
664 return -EINVAL;
665 }
666 }
667
668 /*
669 * em28xx_set_ctrl()
670 * mute or set new saturation, brightness or contrast
671 */
672 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
673 {
674 switch (ctrl->id) {
675 case V4L2_CID_AUDIO_MUTE:
676 if (ctrl->value != dev->mute) {
677 dev->mute = ctrl->value;
678 em28xx_audio_usb_mute(dev, ctrl->value);
679 return em28xx_audio_analog_set(dev);
680 }
681 return 0;
682 case V4L2_CID_AUDIO_VOLUME:
683 dev->volume = ctrl->value;
684 return em28xx_audio_analog_set(dev);
685 default:
686 return -EINVAL;
687 }
688 }
689
690 /*
691 * em28xx_stream_interrupt()
692 * stops streaming
693 */
694 static int em28xx_stream_interrupt(struct em28xx *dev)
695 {
696 int ret = 0;
697
698 /* stop reading from the device */
699
700 dev->stream = STREAM_INTERRUPT;
701 ret = wait_event_timeout(dev->wait_stream,
702 (dev->stream == STREAM_OFF) ||
703 (dev->state & DEV_DISCONNECTED),
704 EM28XX_URB_TIMEOUT);
705 if (dev->state & DEV_DISCONNECTED)
706 return -ENODEV;
707 else if (ret) {
708 dev->state |= DEV_MISCONFIGURED;
709 em28xx_videodbg("device is misconfigured; close and "
710 "open /dev/video%d again\n",
711 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
712 return ret;
713 }
714
715 return 0;
716 }
717
718 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
719 {
720 unsigned int hscale, vscale;
721 unsigned int maxh, maxw;
722
723 maxw = norm_maxw(dev);
724 maxh = norm_maxh(dev);
725
726 /* width must even because of the YUYV format */
727 /* height must be even because of interlacing */
728 height &= 0xfffe;
729 width &= 0xfffe;
730
731 if (height < 32)
732 height = 32;
733 if (height > maxh)
734 height = maxh;
735 if (width < 48)
736 width = 48;
737 if (width > maxw)
738 width = maxw;
739
740 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
741 hscale = 0x3fff;
742 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
743
744 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
745 vscale = 0x3fff;
746 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
747
748 /* set new image size */
749 dev->width = width;
750 dev->height = height;
751 dev->frame_size = dev->width * dev->height * 2;
752 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
753 dev->bytesperline = dev->width * 2;
754 dev->hscale = hscale;
755 dev->vscale = vscale;
756
757 em28xx_resolution_set(dev);
758
759 return 0;
760 }
761
762 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
763 {
764 em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
765 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
766 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
767 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
768 "V4L2_BUF_TYPE_VBI_CAPTURE" :
769 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
770 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
771 "not supported");
772
773 switch (format->type) {
774 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
775 {
776 format->fmt.pix.width = dev->width;
777 format->fmt.pix.height = dev->height;
778 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
779 format->fmt.pix.bytesperline = dev->bytesperline;
780 format->fmt.pix.sizeimage = dev->frame_size;
781 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
782 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
783
784 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
785 dev->height);
786 break;
787 }
788
789 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
790 {
791 format->fmt.sliced.service_set=0;
792
793 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
794
795 if (format->fmt.sliced.service_set==0)
796 return -EINVAL;
797
798 break;
799 }
800
801 default:
802 return -EINVAL;
803 }
804 return (0);
805 }
806
807 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
808 {
809 u32 i;
810 int ret = 0;
811 int width = format->fmt.pix.width;
812 int height = format->fmt.pix.height;
813 unsigned int hscale, vscale;
814 unsigned int maxh, maxw;
815
816 maxw = norm_maxw(dev);
817 maxh = norm_maxh(dev);
818
819 em28xx_videodbg("%s: type=%s\n",
820 cmd == VIDIOC_TRY_FMT ?
821 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
822 format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
823 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
824 format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
825 "V4L2_BUF_TYPE_VBI_CAPTURE " :
826 "not supported");
827
828 if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
829 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
830
831 if (format->fmt.sliced.service_set==0)
832 return -EINVAL;
833
834 return 0;
835 }
836
837
838 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
839 return -EINVAL;
840
841 em28xx_videodbg("%s: requested %dx%d\n",
842 cmd == VIDIOC_TRY_FMT ?
843 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
844 format->fmt.pix.width, format->fmt.pix.height);
845
846 /* FIXME: Move some code away from here */
847 /* width must even because of the YUYV format */
848 /* height must be even because of interlacing */
849 height &= 0xfffe;
850 width &= 0xfffe;
851
852 if (height < 32)
853 height = 32;
854 if (height > maxh)
855 height = maxh;
856 if (width < 48)
857 width = 48;
858 if (width > maxw)
859 width = maxw;
860
861 if(dev->is_em2800){
862 /* the em2800 can only scale down to 50% */
863 if(height % (maxh / 2))
864 height=maxh;
865 if(width % (maxw / 2))
866 width=maxw;
867 /* according to empiatech support */
868 /* the MaxPacketSize is to small to support */
869 /* framesizes larger than 640x480 @ 30 fps */
870 /* or 640x576 @ 25 fps. As this would cut */
871 /* of a part of the image we prefer */
872 /* 360x576 or 360x480 for now */
873 if(width == maxw && height == maxh)
874 width /= 2;
875 }
876
877 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
878 hscale = 0x3fff;
879
880 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
881
882 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
883 vscale = 0x3fff;
884
885 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
886
887 format->fmt.pix.width = width;
888 format->fmt.pix.height = height;
889 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
890 format->fmt.pix.bytesperline = width * 2;
891 format->fmt.pix.sizeimage = width * 2 * height;
892 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
893 format->fmt.pix.field = V4L2_FIELD_INTERLACED;
894
895 em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
896 cmd == VIDIOC_TRY_FMT ?
897 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
898 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
899
900 if (cmd == VIDIOC_TRY_FMT)
901 return 0;
902
903 for (i = 0; i < dev->num_frames; i++)
904 if (dev->frame[i].vma_use_count) {
905 em28xx_videodbg("VIDIOC_S_FMT failed. "
906 "Unmap the buffers first.\n");
907 return -EINVAL;
908 }
909
910 /* stop io in case it is already in progress */
911 if (dev->stream == STREAM_ON) {
912 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
913 if ((ret = em28xx_stream_interrupt(dev)))
914 return ret;
915 }
916
917 em28xx_release_buffers(dev);
918 dev->io = IO_NONE;
919
920 /* set new image size */
921 dev->width = width;
922 dev->height = height;
923 dev->frame_size = dev->width * dev->height * 2;
924 dev->field_size = dev->frame_size >> 1;
925 dev->bytesperline = dev->width * 2;
926 dev->hscale = hscale;
927 dev->vscale = vscale;
928 em28xx_uninit_isoc(dev);
929 em28xx_set_alternate(dev);
930 em28xx_capture_start(dev, 1);
931 em28xx_resolution_set(dev);
932 em28xx_init_isoc(dev);
933
934 return 0;
935 }
936
937 /*
938 * em28xx_v4l2_do_ioctl()
939 * This function is _not_ called directly, but from
940 * em28xx_v4l2_ioctl. Userspace
941 * copying is done already, arg is a kernel pointer.
942 */
943 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
944 struct em28xx *dev, unsigned int cmd, void *arg,
945 v4l2_kioctl driver_ioctl)
946 {
947 int ret;
948
949 switch (cmd) {
950 /* ---------- tv norms ---------- */
951 case VIDIOC_ENUMSTD:
952 {
953 struct v4l2_standard *e = arg;
954 unsigned int i;
955
956 i = e->index;
957 if (i >= TVNORMS)
958 return -EINVAL;
959 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
960 tvnorms[e->index].name);
961 e->index = i;
962 if (ret < 0)
963 return ret;
964 return 0;
965 }
966 case VIDIOC_G_STD:
967 {
968 v4l2_std_id *id = arg;
969
970 *id = dev->tvnorm->id;
971 return 0;
972 }
973 case VIDIOC_S_STD:
974 {
975 v4l2_std_id *id = arg;
976 unsigned int i;
977
978 for (i = 0; i < TVNORMS; i++)
979 if (*id == tvnorms[i].id)
980 break;
981 if (i == TVNORMS)
982 for (i = 0; i < TVNORMS; i++)
983 if (*id & tvnorms[i].id)
984 break;
985 if (i == TVNORMS)
986 return -EINVAL;
987
988 mutex_lock(&dev->lock);
989 dev->tvnorm = &tvnorms[i];
990
991 em28xx_set_norm(dev, dev->width, dev->height);
992
993 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
994 &dev->tvnorm->id);
995
996 mutex_unlock(&dev->lock);
997
998 return 0;
999 }
1000
1001 /* ------ input switching ---------- */
1002 case VIDIOC_ENUMINPUT:
1003 {
1004 struct v4l2_input *i = arg;
1005 unsigned int n;
1006 static const char *iname[] = {
1007 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1008 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1009 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1010 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1011 [EM28XX_VMUX_SVIDEO] = "S-Video",
1012 [EM28XX_VMUX_TELEVISION] = "Television",
1013 [EM28XX_VMUX_CABLE] = "Cable TV",
1014 [EM28XX_VMUX_DVB] = "DVB",
1015 [EM28XX_VMUX_DEBUG] = "for debug only",
1016 };
1017
1018 n = i->index;
1019 if (n >= MAX_EM28XX_INPUT)
1020 return -EINVAL;
1021 if (0 == INPUT(n)->type)
1022 return -EINVAL;
1023 memset(i, 0, sizeof(*i));
1024 i->index = n;
1025 i->type = V4L2_INPUT_TYPE_CAMERA;
1026 strcpy(i->name, iname[INPUT(n)->type]);
1027 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1028 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1029 i->type = V4L2_INPUT_TYPE_TUNER;
1030 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1031 i->std |= tvnorms[n].id;
1032 return 0;
1033 }
1034 case VIDIOC_G_INPUT:
1035 {
1036 int *i = arg;
1037 *i = dev->ctl_input;
1038
1039 return 0;
1040 }
1041 case VIDIOC_S_INPUT:
1042 {
1043 int *index = arg;
1044
1045 if (*index >= MAX_EM28XX_INPUT)
1046 return -EINVAL;
1047 if (0 == INPUT(*index)->type)
1048 return -EINVAL;
1049
1050 mutex_lock(&dev->lock);
1051 video_mux(dev, *index);
1052 mutex_unlock(&dev->lock);
1053
1054 return 0;
1055 }
1056 case VIDIOC_G_AUDIO:
1057 {
1058 struct v4l2_audio *a = arg;
1059 unsigned int index = a->index;
1060
1061 if (a->index > 1)
1062 return -EINVAL;
1063 memset(a, 0, sizeof(*a));
1064 index = dev->ctl_ainput;
1065
1066 if (index == 0) {
1067 strcpy(a->name, "Television");
1068 } else {
1069 strcpy(a->name, "Line In");
1070 }
1071 a->capability = V4L2_AUDCAP_STEREO;
1072 a->index = index;
1073 return 0;
1074 }
1075 case VIDIOC_S_AUDIO:
1076 {
1077 struct v4l2_audio *a = arg;
1078
1079 if (a->index != dev->ctl_ainput)
1080 return -EINVAL;
1081
1082 return 0;
1083 }
1084
1085 /* --- controls ---------------------------------------------- */
1086 case VIDIOC_QUERYCTRL:
1087 {
1088 struct v4l2_queryctrl *qc = arg;
1089 int i, id=qc->id;
1090
1091 memset(qc,0,sizeof(*qc));
1092 qc->id=id;
1093
1094 if (!dev->has_msp34xx) {
1095 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1096 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1097 memcpy(qc, &(em28xx_qctrl[i]),
1098 sizeof(*qc));
1099 return 0;
1100 }
1101 }
1102 }
1103 em28xx_i2c_call_clients(dev,cmd,qc);
1104 if (qc->type)
1105 return 0;
1106 else
1107 return -EINVAL;
1108 }
1109 case VIDIOC_G_CTRL:
1110 {
1111 struct v4l2_control *ctrl = arg;
1112 int retval=-EINVAL;
1113
1114 if (!dev->has_msp34xx)
1115 retval=em28xx_get_ctrl(dev, ctrl);
1116 if (retval==-EINVAL) {
1117 em28xx_i2c_call_clients(dev,cmd,arg);
1118 return 0;
1119 } else return retval;
1120 }
1121 case VIDIOC_S_CTRL:
1122 {
1123 struct v4l2_control *ctrl = arg;
1124 u8 i;
1125
1126 if (!dev->has_msp34xx){
1127 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1128 if (ctrl->id == em28xx_qctrl[i].id) {
1129 if (ctrl->value <
1130 em28xx_qctrl[i].minimum
1131 || ctrl->value >
1132 em28xx_qctrl[i].maximum)
1133 return -ERANGE;
1134 return em28xx_set_ctrl(dev, ctrl);
1135 }
1136 }
1137 }
1138
1139 em28xx_i2c_call_clients(dev,cmd,arg);
1140 return 0;
1141 }
1142 /* --- tuner ioctls ------------------------------------------ */
1143 case VIDIOC_G_TUNER:
1144 {
1145 struct v4l2_tuner *t = arg;
1146
1147 if (0 != t->index)
1148 return -EINVAL;
1149
1150 memset(t, 0, sizeof(*t));
1151 strcpy(t->name, "Tuner");
1152 mutex_lock(&dev->lock);
1153 /* let clients fill in the remainder of this struct */
1154 em28xx_i2c_call_clients(dev, cmd, t);
1155 mutex_unlock(&dev->lock);
1156 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1157 t->afc);
1158 return 0;
1159 }
1160 case VIDIOC_S_TUNER:
1161 {
1162 struct v4l2_tuner *t = arg;
1163
1164 if (0 != t->index)
1165 return -EINVAL;
1166 mutex_lock(&dev->lock);
1167 /* let clients handle this */
1168 em28xx_i2c_call_clients(dev, cmd, t);
1169 mutex_unlock(&dev->lock);
1170 return 0;
1171 }
1172 case VIDIOC_G_FREQUENCY:
1173 {
1174 struct v4l2_frequency *f = arg;
1175
1176 memset(f, 0, sizeof(*f));
1177 f->type = V4L2_TUNER_ANALOG_TV;
1178 f->frequency = dev->ctl_freq;
1179
1180 return 0;
1181 }
1182 case VIDIOC_S_FREQUENCY:
1183 {
1184 struct v4l2_frequency *f = arg;
1185
1186 if (0 != f->tuner)
1187 return -EINVAL;
1188
1189 if (V4L2_TUNER_ANALOG_TV != f->type)
1190 return -EINVAL;
1191
1192 mutex_lock(&dev->lock);
1193 dev->ctl_freq = f->frequency;
1194 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1195 mutex_unlock(&dev->lock);
1196 return 0;
1197 }
1198 case VIDIOC_CROPCAP:
1199 {
1200 struct v4l2_cropcap *cc = arg;
1201
1202 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1203 return -EINVAL;
1204 cc->bounds.left = 0;
1205 cc->bounds.top = 0;
1206 cc->bounds.width = dev->width;
1207 cc->bounds.height = dev->height;
1208 cc->defrect = cc->bounds;
1209 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1210 cc->pixelaspect.denominator = 59;
1211 return 0;
1212 }
1213 case VIDIOC_STREAMON:
1214 {
1215 int *type = arg;
1216
1217 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1218 || dev->io != IO_MMAP)
1219 return -EINVAL;
1220
1221 if (list_empty(&dev->inqueue))
1222 return -EINVAL;
1223
1224 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
1225
1226 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1227
1228 return 0;
1229 }
1230 case VIDIOC_STREAMOFF:
1231 {
1232 int *type = arg;
1233 int ret;
1234
1235 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1236 || dev->io != IO_MMAP)
1237 return -EINVAL;
1238
1239 if (dev->stream == STREAM_ON) {
1240 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1241 if ((ret = em28xx_stream_interrupt(dev)))
1242 return ret;
1243 }
1244 em28xx_empty_framequeues(dev);
1245
1246 return 0;
1247 }
1248 default:
1249 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1250 driver_ioctl);
1251 }
1252 return 0;
1253 }
1254
1255 /*
1256 * em28xx_v4l2_do_ioctl()
1257 * This function is _not_ called directly, but from
1258 * em28xx_v4l2_ioctl. Userspace
1259 * copying is done already, arg is a kernel pointer.
1260 */
1261 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1262 unsigned int cmd, void *arg)
1263 {
1264 struct em28xx *dev = filp->private_data;
1265
1266 if (!dev)
1267 return -ENODEV;
1268
1269 if (video_debug > 1)
1270 v4l_print_ioctl(dev->name,cmd);
1271
1272 switch (cmd) {
1273
1274 /* --- capabilities ------------------------------------------ */
1275 case VIDIOC_QUERYCAP:
1276 {
1277 struct v4l2_capability *cap = arg;
1278
1279 memset(cap, 0, sizeof(*cap));
1280 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1281 strlcpy(cap->card, em28xx_boards[dev->model].name,
1282 sizeof(cap->card));
1283 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1284 sizeof(cap->bus_info));
1285 cap->version = EM28XX_VERSION_CODE;
1286 cap->capabilities =
1287 V4L2_CAP_SLICED_VBI_CAPTURE |
1288 V4L2_CAP_VIDEO_CAPTURE |
1289 V4L2_CAP_AUDIO |
1290 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1291 if (dev->has_tuner)
1292 cap->capabilities |= V4L2_CAP_TUNER;
1293 return 0;
1294 }
1295 /* --- capture ioctls ---------------------------------------- */
1296 case VIDIOC_ENUM_FMT:
1297 {
1298 struct v4l2_fmtdesc *fmtd = arg;
1299
1300 if (fmtd->index != 0)
1301 return -EINVAL;
1302 memset(fmtd, 0, sizeof(*fmtd));
1303 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1304 strcpy(fmtd->description, "Packed YUY2");
1305 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1306 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1307 return 0;
1308 }
1309 case VIDIOC_G_FMT:
1310 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1311
1312 case VIDIOC_TRY_FMT:
1313 case VIDIOC_S_FMT:
1314 return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1315
1316 case VIDIOC_REQBUFS:
1317 {
1318 struct v4l2_requestbuffers *rb = arg;
1319 u32 i;
1320 int ret;
1321
1322 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1323 rb->memory != V4L2_MEMORY_MMAP)
1324 return -EINVAL;
1325
1326 if (dev->io == IO_READ) {
1327 em28xx_videodbg ("method is set to read;"
1328 " close and open the device again to"
1329 " choose the mmap I/O method\n");
1330 return -EINVAL;
1331 }
1332
1333 for (i = 0; i < dev->num_frames; i++)
1334 if (dev->frame[i].vma_use_count) {
1335 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1336 return -EINVAL;
1337 }
1338
1339 if (dev->stream == STREAM_ON) {
1340 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1341 if ((ret = em28xx_stream_interrupt(dev)))
1342 return ret;
1343 }
1344
1345 em28xx_empty_framequeues(dev);
1346
1347 em28xx_release_buffers(dev);
1348 if (rb->count)
1349 rb->count =
1350 em28xx_request_buffers(dev, rb->count);
1351
1352 dev->frame_current = NULL;
1353
1354 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1355 rb->count);
1356 dev->io = rb->count ? IO_MMAP : IO_NONE;
1357 return 0;
1358 }
1359 case VIDIOC_QUERYBUF:
1360 {
1361 struct v4l2_buffer *b = arg;
1362
1363 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1364 b->index >= dev->num_frames || dev->io != IO_MMAP)
1365 return -EINVAL;
1366
1367 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1368
1369 if (dev->frame[b->index].vma_use_count) {
1370 b->flags |= V4L2_BUF_FLAG_MAPPED;
1371 }
1372 if (dev->frame[b->index].state == F_DONE)
1373 b->flags |= V4L2_BUF_FLAG_DONE;
1374 else if (dev->frame[b->index].state != F_UNUSED)
1375 b->flags |= V4L2_BUF_FLAG_QUEUED;
1376 return 0;
1377 }
1378 case VIDIOC_QBUF:
1379 {
1380 struct v4l2_buffer *b = arg;
1381 unsigned long lock_flags;
1382
1383 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1384 b->index >= dev->num_frames || dev->io != IO_MMAP) {
1385 return -EINVAL;
1386 }
1387
1388 if (dev->frame[b->index].state != F_UNUSED) {
1389 return -EAGAIN;
1390 }
1391 dev->frame[b->index].state = F_QUEUED;
1392
1393 /* add frame to fifo */
1394 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1395 list_add_tail(&dev->frame[b->index].frame,
1396 &dev->inqueue);
1397 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1398
1399 return 0;
1400 }
1401 case VIDIOC_DQBUF:
1402 {
1403 struct v4l2_buffer *b = arg;
1404 struct em28xx_frame_t *f;
1405 unsigned long lock_flags;
1406 int ret = 0;
1407
1408 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1409 || dev->io != IO_MMAP)
1410 return -EINVAL;
1411
1412 if (list_empty(&dev->outqueue)) {
1413 if (dev->stream == STREAM_OFF)
1414 return -EINVAL;
1415 if (filp->f_flags & O_NONBLOCK)
1416 return -EAGAIN;
1417 ret = wait_event_interruptible
1418 (dev->wait_frame,
1419 (!list_empty(&dev->outqueue)) ||
1420 (dev->state & DEV_DISCONNECTED));
1421 if (ret)
1422 return ret;
1423 if (dev->state & DEV_DISCONNECTED)
1424 return -ENODEV;
1425 }
1426
1427 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1428 f = list_entry(dev->outqueue.next,
1429 struct em28xx_frame_t, frame);
1430 list_del(dev->outqueue.next);
1431 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1432
1433 f->state = F_UNUSED;
1434 memcpy(b, &f->buf, sizeof(*b));
1435
1436 if (f->vma_use_count)
1437 b->flags |= V4L2_BUF_FLAG_MAPPED;
1438
1439 return 0;
1440 }
1441 default:
1442 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1443 em28xx_video_do_ioctl);
1444 }
1445 return 0;
1446 }
1447
1448 /*
1449 * em28xx_v4l2_ioctl()
1450 * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1451 */
1452 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1453 unsigned int cmd, unsigned long arg)
1454 {
1455 int ret = 0;
1456 struct em28xx *dev = filp->private_data;
1457
1458 if (mutex_lock_interruptible(&dev->fileop_lock))
1459 return -ERESTARTSYS;
1460
1461 if (dev->state & DEV_DISCONNECTED) {
1462 em28xx_errdev("v4l2 ioctl: device not present\n");
1463 mutex_unlock(&dev->fileop_lock);
1464 return -ENODEV;
1465 }
1466
1467 if (dev->state & DEV_MISCONFIGURED) {
1468 em28xx_errdev
1469 ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1470 mutex_unlock(&dev->fileop_lock);
1471 return -EIO;
1472 }
1473
1474 ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1475
1476 mutex_unlock(&dev->fileop_lock);
1477
1478 return ret;
1479 }
1480
1481 static const struct file_operations em28xx_v4l_fops = {
1482 .owner = THIS_MODULE,
1483 .open = em28xx_v4l2_open,
1484 .release = em28xx_v4l2_close,
1485 .ioctl = em28xx_v4l2_ioctl,
1486 .read = em28xx_v4l2_read,
1487 .poll = em28xx_v4l2_poll,
1488 .mmap = em28xx_v4l2_mmap,
1489 .llseek = no_llseek,
1490 .compat_ioctl = v4l_compat_ioctl32,
1491
1492 };
1493
1494 /******************************** usb interface *****************************************/
1495
1496 /*
1497 * em28xx_init_dev()
1498 * allocates and inits the device structs, registers i2c bus and v4l device
1499 */
1500 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1501 int minor, int model)
1502 {
1503 struct em28xx *dev = *devhandle;
1504 int retval = -ENOMEM;
1505 int errCode, i;
1506 unsigned int maxh, maxw;
1507
1508 dev->udev = udev;
1509 dev->model = model;
1510 mutex_init(&dev->lock);
1511 init_waitqueue_head(&dev->open);
1512
1513 dev->em28xx_write_regs = em28xx_write_regs;
1514 dev->em28xx_read_reg = em28xx_read_reg;
1515 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1516 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1517 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1518 dev->is_em2800 = em28xx_boards[model].is_em2800;
1519 dev->has_tuner = em28xx_boards[model].has_tuner;
1520 dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1521 dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1522 dev->decoder = em28xx_boards[model].decoder;
1523
1524 if (tuner >= 0)
1525 dev->tuner_type = tuner;
1526 else
1527 dev->tuner_type = em28xx_boards[model].tuner_type;
1528
1529 dev->video_inputs = em28xx_boards[model].vchannels;
1530
1531 for (i = 0; i < TVNORMS; i++)
1532 if (em28xx_boards[model].norm == tvnorms[i].mode)
1533 break;
1534 if (i == TVNORMS)
1535 i = 0;
1536
1537 dev->tvnorm = &tvnorms[i]; /* set default norm */
1538
1539 em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1540
1541 maxw = norm_maxw(dev);
1542 maxh = norm_maxh(dev);
1543
1544 /* set default image size */
1545 dev->width = maxw;
1546 dev->height = maxh;
1547 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1548 dev->field_size = dev->width * dev->height;
1549 dev->frame_size =
1550 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1551 dev->bytesperline = dev->width * 2;
1552 dev->hscale = 0;
1553 dev->vscale = 0;
1554 dev->ctl_input = 2;
1555
1556 /* setup video picture settings for saa7113h */
1557 memset(&dev->vpic, 0, sizeof(dev->vpic));
1558 dev->vpic.colour = 128 << 8;
1559 dev->vpic.hue = 128 << 8;
1560 dev->vpic.brightness = 128 << 8;
1561 dev->vpic.contrast = 192 << 8;
1562 dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1563 dev->vpic.depth = 16;
1564 dev->vpic.palette = VIDEO_PALETTE_YUV422;
1565
1566 em28xx_pre_card_setup(dev);
1567 #ifdef CONFIG_MODULES
1568 /* request some modules */
1569 if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1570 request_module("saa7115");
1571 if (dev->decoder == EM28XX_TVP5150)
1572 request_module("tvp5150");
1573 if (dev->has_tuner)
1574 request_module("tuner");
1575 #endif
1576 errCode = em28xx_config(dev);
1577 if (errCode) {
1578 em28xx_errdev("error configuring device\n");
1579 em28xx_devused&=~(1<<dev->devno);
1580 kfree(dev);
1581 return -ENOMEM;
1582 }
1583
1584 mutex_lock(&dev->lock);
1585 /* register i2c bus */
1586 em28xx_i2c_register(dev);
1587
1588 /* Do board specific init and eeprom reading */
1589 em28xx_card_setup(dev);
1590
1591 /* configure the device */
1592 em28xx_config_i2c(dev);
1593
1594 mutex_unlock(&dev->lock);
1595
1596 errCode = em28xx_config(dev);
1597
1598 #ifdef CONFIG_MODULES
1599 if (dev->has_msp34xx)
1600 request_module("msp3400");
1601 #endif
1602 /* allocate and fill v4l2 device struct */
1603 dev->vdev = video_device_alloc();
1604 if (NULL == dev->vdev) {
1605 em28xx_errdev("cannot allocate video_device.\n");
1606 em28xx_devused&=~(1<<dev->devno);
1607 kfree(dev);
1608 return -ENOMEM;
1609 }
1610
1611 dev->vbi_dev = video_device_alloc();
1612 if (NULL == dev->vbi_dev) {
1613 em28xx_errdev("cannot allocate video_device.\n");
1614 kfree(dev->vdev);
1615 em28xx_devused&=~(1<<dev->devno);
1616 kfree(dev);
1617 return -ENOMEM;
1618 }
1619
1620 /* Fills VBI device info */
1621 dev->vbi_dev->type = VFL_TYPE_VBI;
1622 dev->vbi_dev->hardware = 0;
1623 dev->vbi_dev->fops = &em28xx_v4l_fops;
1624 dev->vbi_dev->minor = -1;
1625 dev->vbi_dev->dev = &dev->udev->dev;
1626 dev->vbi_dev->release = video_device_release;
1627 snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1628 "em28xx",dev->devno,"vbi");
1629
1630 /* Fills CAPTURE device info */
1631 dev->vdev->type = VID_TYPE_CAPTURE;
1632 if (dev->has_tuner)
1633 dev->vdev->type |= VID_TYPE_TUNER;
1634 dev->vdev->hardware = 0;
1635 dev->vdev->fops = &em28xx_v4l_fops;
1636 dev->vdev->minor = -1;
1637 dev->vdev->dev = &dev->udev->dev;
1638 dev->vdev->release = video_device_release;
1639 snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1640 "em28xx",dev->devno,"video");
1641
1642 list_add_tail(&dev->devlist,&em28xx_devlist);
1643
1644 /* register v4l2 device */
1645 mutex_lock(&dev->lock);
1646 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1647 video_nr[dev->devno]))) {
1648 em28xx_errdev("unable to register video device (error=%i).\n",
1649 retval);
1650 mutex_unlock(&dev->lock);
1651 list_del(&dev->devlist);
1652 video_device_release(dev->vdev);
1653 em28xx_devused&=~(1<<dev->devno);
1654 kfree(dev);
1655 return -ENODEV;
1656 }
1657
1658 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1659 vbi_nr[dev->devno]) < 0) {
1660 printk("unable to register vbi device\n");
1661 mutex_unlock(&dev->lock);
1662 list_del(&dev->devlist);
1663 video_device_release(dev->vbi_dev);
1664 video_device_release(dev->vdev);
1665 em28xx_devused&=~(1<<dev->devno);
1666 kfree(dev);
1667 return -ENODEV;
1668 } else {
1669 printk("registered VBI\n");
1670 }
1671
1672 if (dev->has_msp34xx) {
1673 /* Send a reset to other chips via gpio */
1674 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1675 msleep(3);
1676 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1677 msleep(3);
1678
1679 }
1680 video_mux(dev, 0);
1681
1682 mutex_unlock(&dev->lock);
1683
1684 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1685 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1686 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1687
1688 return 0;
1689 }
1690
1691 /*
1692 * em28xx_usb_probe()
1693 * checks for supported devices
1694 */
1695 static int em28xx_usb_probe(struct usb_interface *interface,
1696 const struct usb_device_id *id)
1697 {
1698 const struct usb_endpoint_descriptor *endpoint;
1699 struct usb_device *udev;
1700 struct usb_interface *uif;
1701 struct em28xx *dev = NULL;
1702 int retval = -ENODEV;
1703 int model,i,nr,ifnum;
1704
1705 udev = usb_get_dev(interface_to_usbdev(interface));
1706 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1707
1708 /* Check to see next free device and mark as used */
1709 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1710 em28xx_devused|=1<<nr;
1711
1712 /* Don't register audio interfaces */
1713 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1714 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1715 udev->descriptor.idVendor,udev->descriptor.idProduct,
1716 ifnum,
1717 interface->altsetting[0].desc.bInterfaceClass);
1718
1719 em28xx_devused&=~(1<<nr);
1720 return -ENODEV;
1721 }
1722
1723 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1724 udev->descriptor.idVendor,udev->descriptor.idProduct,
1725 ifnum,
1726 interface->altsetting[0].desc.bInterfaceClass);
1727
1728 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1729
1730 /* check if the device has the iso in endpoint at the correct place */
1731 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1732 USB_ENDPOINT_XFER_ISOC) {
1733 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1734 em28xx_devused&=~(1<<nr);
1735 return -ENODEV;
1736 }
1737 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1738 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1739 em28xx_devused&=~(1<<nr);
1740 return -ENODEV;
1741 }
1742
1743 model=id->driver_info;
1744
1745 if (nr >= EM28XX_MAXBOARDS) {
1746 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1747 em28xx_devused&=~(1<<nr);
1748 return -ENOMEM;
1749 }
1750
1751 /* allocate memory for our device state and initialize it */
1752 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1753 if (dev == NULL) {
1754 em28xx_err(DRIVER_NAME ": out of memory!\n");
1755 em28xx_devused&=~(1<<nr);
1756 return -ENOMEM;
1757 }
1758
1759 snprintf(dev->name, 29, "em28xx #%d", nr);
1760 dev->devno=nr;
1761
1762 /* compute alternate max packet sizes */
1763 uif = udev->actconfig->interface[0];
1764
1765 dev->num_alt=uif->num_altsetting;
1766 em28xx_info("Alternate settings: %i\n",dev->num_alt);
1767 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1768 dev->alt_max_pkt_size = kmalloc(32*
1769 dev->num_alt,GFP_KERNEL);
1770 if (dev->alt_max_pkt_size == NULL) {
1771 em28xx_errdev("out of memory!\n");
1772 em28xx_devused&=~(1<<nr);
1773 kfree(dev);
1774 return -ENOMEM;
1775 }
1776
1777 for (i = 0; i < dev->num_alt ; i++) {
1778 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1779 wMaxPacketSize);
1780 dev->alt_max_pkt_size[i] =
1781 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1782 em28xx_info("Alternate setting %i, max size= %i\n",i,
1783 dev->alt_max_pkt_size[i]);
1784 }
1785
1786 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1787 model=card[nr];
1788
1789 if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1790 em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
1791 "%s: be autodetected. Please pass card=<n> insmod option to\n"
1792 "%s: workaround that. Redirect complaints to the vendor of\n"
1793 "%s: the TV card. Generic type will be used."
1794 "%s: Best regards,\n"
1795 "%s: -- tux\n",
1796 dev->name,dev->name,dev->name,dev->name,dev->name);
1797 em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1798 dev->name);
1799 for (i = 0; i < em28xx_bcount; i++) {
1800 em28xx_errdev(" card=%d -> %s\n", i,
1801 em28xx_boards[i].name);
1802 }
1803 }
1804
1805 /* allocate device struct */
1806 retval = em28xx_init_dev(&dev, udev, nr, model);
1807 if (retval)
1808 return retval;
1809
1810 em28xx_info("Found %s\n", em28xx_boards[model].name);
1811
1812 /* save our data pointer in this interface device */
1813 usb_set_intfdata(interface, dev);
1814 return 0;
1815 }
1816
1817 /*
1818 * em28xx_usb_disconnect()
1819 * called when the device gets diconencted
1820 * video device will be unregistered on v4l2_close in case it is still open
1821 */
1822 static void em28xx_usb_disconnect(struct usb_interface *interface)
1823 {
1824 struct em28xx *dev = usb_get_intfdata(interface);
1825 usb_set_intfdata(interface, NULL);
1826
1827 if (!dev)
1828 return;
1829
1830 down_write(&em28xx_disconnect);
1831
1832 mutex_lock(&dev->lock);
1833
1834 em28xx_info("disconnecting %s\n", dev->vdev->name);
1835
1836 wake_up_interruptible_all(&dev->open);
1837
1838 if (dev->users) {
1839 em28xx_warn
1840 ("device /dev/video%d is open! Deregistration and memory "
1841 "deallocation are deferred on close.\n",
1842 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1843
1844 dev->state |= DEV_MISCONFIGURED;
1845 em28xx_uninit_isoc(dev);
1846 dev->state |= DEV_DISCONNECTED;
1847 wake_up_interruptible(&dev->wait_frame);
1848 wake_up_interruptible(&dev->wait_stream);
1849 } else {
1850 dev->state |= DEV_DISCONNECTED;
1851 em28xx_release_resources(dev);
1852 }
1853
1854 mutex_unlock(&dev->lock);
1855
1856 if (!dev->users) {
1857 kfree(dev->alt_max_pkt_size);
1858 kfree(dev);
1859 }
1860
1861 up_write(&em28xx_disconnect);
1862 }
1863
1864 static struct usb_driver em28xx_usb_driver = {
1865 .name = "em28xx",
1866 .probe = em28xx_usb_probe,
1867 .disconnect = em28xx_usb_disconnect,
1868 .id_table = em28xx_id_table,
1869 };
1870
1871 static int __init em28xx_module_init(void)
1872 {
1873 int result;
1874
1875 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1876 (EM28XX_VERSION_CODE >> 16) & 0xff,
1877 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1878 #ifdef SNAPSHOT
1879 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1880 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1881 #endif
1882
1883 /* register this driver with the USB subsystem */
1884 result = usb_register(&em28xx_usb_driver);
1885 if (result)
1886 em28xx_err(DRIVER_NAME
1887 " usb_register failed. Error number %d.\n", result);
1888
1889 return result;
1890 }
1891
1892 static void __exit em28xx_module_exit(void)
1893 {
1894 /* deregister this driver with the USB subsystem */
1895 usb_deregister(&em28xx_usb_driver);
1896 }
1897
1898 module_init(em28xx_module_init);
1899 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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