?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
V4L/DVB (6535): Fix: Adds the generic PCI IDs for em28xx
[linux-2.6/kvm.git] / drivers / media / video / em28xx / em28xx-video.c
blobfb0fa57dec92612e6ee847b10e02fa9402e7b908
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 if (!dev->is_em2800)
148 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
149
150 /* enable vbi capturing */
151
152 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
153 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
154 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
155
156 em28xx_audio_usb_mute(dev, 1);
157 dev->mute = 1; /* maybe not the right place... */
158 dev->volume = 0x1f;
159 em28xx_audio_analog_set(dev);
160 em28xx_audio_analog_setup(dev);
161 em28xx_outfmt_set_yuv422(dev);
162 em28xx_colorlevels_set_default(dev);
163 em28xx_compression_disable(dev);
164
165 return 0;
166 }
167
168 /*
169 * em28xx_config_i2c()
170 * configure i2c attached devices
171 */
172 static void em28xx_config_i2c(struct em28xx *dev)
173 {
174 struct v4l2_frequency f;
175 struct v4l2_routing route;
176
177 route.input = INPUT(dev->ctl_input)->vmux;
178 route.output = 0;
179 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
180 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
181 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
182
183 /* configure tuner */
184 f.tuner = 0;
185 f.type = V4L2_TUNER_ANALOG_TV;
186 f.frequency = 9076; /* FIXME:remove magic number */
187 dev->ctl_freq = f.frequency;
188 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
189 }
190
191 /*
192 * em28xx_empty_framequeues()
193 * prepare queues for incoming and outgoing frames
194 */
195 static void em28xx_empty_framequeues(struct em28xx *dev)
196 {
197 u32 i;
198
199 INIT_LIST_HEAD(&dev->inqueue);
200 INIT_LIST_HEAD(&dev->outqueue);
201
202 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
203 dev->frame[i].state = F_UNUSED;
204 dev->frame[i].buf.bytesused = 0;
205 }
206 }
207
208 static void video_mux(struct em28xx *dev, int index)
209 {
210 int ainput;
211 struct v4l2_routing route;
212
213 route.input = INPUT(index)->vmux;
214 route.output = 0;
215 dev->ctl_input = index;
216 dev->ctl_ainput = INPUT(index)->amux;
217
218 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
219
220 em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
221
222 if (dev->has_msp34xx) {
223 if (dev->i2s_speed)
224 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
225 route.input = dev->ctl_ainput;
226 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
227 /* Note: this is msp3400 specific */
228 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
229 ainput = EM28XX_AUDIO_SRC_TUNER;
230 em28xx_audio_source(dev, ainput);
231 } else {
232 switch (dev->ctl_ainput) {
233 case 0:
234 ainput = EM28XX_AUDIO_SRC_TUNER;
235 break;
236 default:
237 ainput = EM28XX_AUDIO_SRC_LINE;
238 }
239 em28xx_audio_source(dev, ainput);
240 }
241 }
242
243 /*
244 * em28xx_v4l2_open()
245 * inits the device and starts isoc transfer
246 */
247 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
248 {
249 int minor = iminor(inode);
250 int errCode = 0;
251 struct em28xx *h,*dev = NULL;
252
253 list_for_each_entry(h, &em28xx_devlist, devlist) {
254 if (h->vdev->minor == minor) {
255 dev = h;
256 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
257 }
258 if (h->vbi_dev->minor == minor) {
259 dev = h;
260 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
261 }
262 }
263 if (NULL == dev)
264 return -ENODEV;
265
266 em28xx_videodbg("open minor=%d type=%s users=%d\n",
267 minor,v4l2_type_names[dev->type],dev->users);
268
269 if (!down_read_trylock(&em28xx_disconnect))
270 return -ERESTARTSYS;
271
272 if (dev->users) {
273 em28xx_warn("this driver can be opened only once\n");
274 up_read(&em28xx_disconnect);
275 return -EBUSY;
276 }
277
278 mutex_init(&dev->fileop_lock); /* to 1 == available */
279 spin_lock_init(&dev->queue_lock);
280 init_waitqueue_head(&dev->wait_frame);
281 init_waitqueue_head(&dev->wait_stream);
282
283 mutex_lock(&dev->lock);
284
285 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
286 em28xx_set_alternate(dev);
287
288 dev->width = norm_maxw(dev);
289 dev->height = norm_maxh(dev);
290 dev->frame_size = dev->width * dev->height * 2;
291 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
292 dev->bytesperline = dev->width * 2;
293 dev->hscale = 0;
294 dev->vscale = 0;
295
296 em28xx_capture_start(dev, 1);
297 em28xx_resolution_set(dev);
298
299 /* device needs to be initialized before isoc transfer */
300 video_mux(dev, 0);
301
302 /* start the transfer */
303 errCode = em28xx_init_isoc(dev);
304 if (errCode)
305 goto err;
306
307 }
308
309 dev->users++;
310 filp->private_data = dev;
311 dev->io = IO_NONE;
312 dev->stream = STREAM_OFF;
313 dev->num_frames = 0;
314
315 /* prepare queues */
316 em28xx_empty_framequeues(dev);
317
318 dev->state |= DEV_INITIALIZED;
319
320 err:
321 mutex_unlock(&dev->lock);
322 up_read(&em28xx_disconnect);
323 return errCode;
324 }
325
326 /*
327 * em28xx_realease_resources()
328 * unregisters the v4l2,i2c and usb devices
329 * called when the device gets disconected or at module unload
330 */
331 static void em28xx_release_resources(struct em28xx *dev)
332 {
333 mutex_lock(&em28xx_sysfs_lock);
334
335 /*FIXME: I2C IR should be disconnected */
336
337 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
338 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
339 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
340 list_del(&dev->devlist);
341 video_unregister_device(dev->vdev);
342 video_unregister_device(dev->vbi_dev);
343 em28xx_i2c_unregister(dev);
344 usb_put_dev(dev->udev);
345 mutex_unlock(&em28xx_sysfs_lock);
346
347
348 /* Mark device as unused */
349 em28xx_devused&=~(1<<dev->devno);
350 }
351
352 /*
353 * em28xx_v4l2_close()
354 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
355 */
356 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
357 {
358 int errCode;
359 struct em28xx *dev=filp->private_data;
360
361 em28xx_videodbg("users=%d\n", dev->users);
362
363 mutex_lock(&dev->lock);
364
365 em28xx_uninit_isoc(dev);
366
367 em28xx_release_buffers(dev);
368
369 /* the device is already disconnect, free the remaining resources */
370 if (dev->state & DEV_DISCONNECTED) {
371 em28xx_release_resources(dev);
372 mutex_unlock(&dev->lock);
373 kfree(dev);
374 return 0;
375 }
376
377 /* set alternate 0 */
378 dev->alt = 0;
379 em28xx_videodbg("setting alternate 0\n");
380 errCode = usb_set_interface(dev->udev, 0, 0);
381 if (errCode < 0) {
382 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
383 errCode);
384 }
385
386 dev->users--;
387 wake_up_interruptible_nr(&dev->open, 1);
388 mutex_unlock(&dev->lock);
389 return 0;
390 }
391
392 /*
393 * em28xx_v4l2_read()
394 * will allocate buffers when called for the first time
395 */
396 static ssize_t
397 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
398 loff_t * f_pos)
399 {
400 struct em28xx_frame_t *f, *i;
401 unsigned long lock_flags;
402 int ret = 0;
403 struct em28xx *dev = filp->private_data;
404
405 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
406 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
407 }
408 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
409 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
410 em28xx_videodbg("not supported yet! ...\n");
411 if (copy_to_user(buf, "", 1)) {
412 mutex_unlock(&dev->fileop_lock);
413 return -EFAULT;
414 }
415 return (1);
416 }
417 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
418 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
419 em28xx_videodbg("not supported yet! ...\n");
420 if (copy_to_user(buf, "", 1)) {
421 mutex_unlock(&dev->fileop_lock);
422 return -EFAULT;
423 }
424 return (1);
425 }
426
427 if (mutex_lock_interruptible(&dev->fileop_lock))
428 return -ERESTARTSYS;
429
430 if (dev->state & DEV_DISCONNECTED) {
431 em28xx_videodbg("device not present\n");
432 mutex_unlock(&dev->fileop_lock);
433 return -ENODEV;
434 }
435
436 if (dev->state & DEV_MISCONFIGURED) {
437 em28xx_videodbg("device misconfigured; close and open it again\n");
438 mutex_unlock(&dev->fileop_lock);
439 return -EIO;
440 }
441
442 if (dev->io == IO_MMAP) {
443 em28xx_videodbg ("IO method is set to mmap; close and open"
444 " the device again to choose the read method\n");
445 mutex_unlock(&dev->fileop_lock);
446 return -EINVAL;
447 }
448
449 if (dev->io == IO_NONE) {
450 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
451 em28xx_errdev("read failed, not enough memory\n");
452 mutex_unlock(&dev->fileop_lock);
453 return -ENOMEM;
454 }
455 dev->io = IO_READ;
456 dev->stream = STREAM_ON;
457 em28xx_queue_unusedframes(dev);
458 }
459
460 if (!count) {
461 mutex_unlock(&dev->fileop_lock);
462 return 0;
463 }
464
465 if (list_empty(&dev->outqueue)) {
466 if (filp->f_flags & O_NONBLOCK) {
467 mutex_unlock(&dev->fileop_lock);
468 return -EAGAIN;
469 }
470 ret = wait_event_interruptible
471 (dev->wait_frame,
472 (!list_empty(&dev->outqueue)) ||
473 (dev->state & DEV_DISCONNECTED));
474 if (ret) {
475 mutex_unlock(&dev->fileop_lock);
476 return ret;
477 }
478 if (dev->state & DEV_DISCONNECTED) {
479 mutex_unlock(&dev->fileop_lock);
480 return -ENODEV;
481 }
482 }
483
484 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
485
486 spin_lock_irqsave(&dev->queue_lock, lock_flags);
487 list_for_each_entry(i, &dev->outqueue, frame)
488 i->state = F_UNUSED;
489 INIT_LIST_HEAD(&dev->outqueue);
490 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
491
492 em28xx_queue_unusedframes(dev);
493
494 if (count > f->buf.length)
495 count = f->buf.length;
496
497 if (copy_to_user(buf, f->bufmem, count)) {
498 mutex_unlock(&dev->fileop_lock);
499 return -EFAULT;
500 }
501 *f_pos += count;
502
503 mutex_unlock(&dev->fileop_lock);
504
505 return count;
506 }
507
508 /*
509 * em28xx_v4l2_poll()
510 * will allocate buffers when called for the first time
511 */
512 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
513 {
514 unsigned int mask = 0;
515 struct em28xx *dev = filp->private_data;
516
517 if (mutex_lock_interruptible(&dev->fileop_lock))
518 return POLLERR;
519
520 if (dev->state & DEV_DISCONNECTED) {
521 em28xx_videodbg("device not present\n");
522 } else if (dev->state & DEV_MISCONFIGURED) {
523 em28xx_videodbg("device is misconfigured; close and open it again\n");
524 } else {
525 if (dev->io == IO_NONE) {
526 if (!em28xx_request_buffers
527 (dev, EM28XX_NUM_READ_FRAMES)) {
528 em28xx_warn
529 ("poll() failed, not enough memory\n");
530 } else {
531 dev->io = IO_READ;
532 dev->stream = STREAM_ON;
533 }
534 }
535
536 if (dev->io == IO_READ) {
537 em28xx_queue_unusedframes(dev);
538 poll_wait(filp, &dev->wait_frame, wait);
539
540 if (!list_empty(&dev->outqueue))
541 mask |= POLLIN | POLLRDNORM;
542
543 mutex_unlock(&dev->fileop_lock);
544
545 return mask;
546 }
547 }
548
549 mutex_unlock(&dev->fileop_lock);
550 return POLLERR;
551 }
552
553 /*
554 * em28xx_vm_open()
555 */
556 static void em28xx_vm_open(struct vm_area_struct *vma)
557 {
558 struct em28xx_frame_t *f = vma->vm_private_data;
559 f->vma_use_count++;
560 }
561
562 /*
563 * em28xx_vm_close()
564 */
565 static void em28xx_vm_close(struct vm_area_struct *vma)
566 {
567 /* NOTE: buffers are not freed here */
568 struct em28xx_frame_t *f = vma->vm_private_data;
569
570 if (f->vma_use_count)
571 f->vma_use_count--;
572 }
573
574 static struct vm_operations_struct em28xx_vm_ops = {
575 .open = em28xx_vm_open,
576 .close = em28xx_vm_close,
577 };
578
579 /*
580 * em28xx_v4l2_mmap()
581 */
582 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
583 {
584 unsigned long size = vma->vm_end - vma->vm_start,
585 start = vma->vm_start;
586 void *pos;
587 u32 i;
588
589 struct em28xx *dev = filp->private_data;
590
591 if (mutex_lock_interruptible(&dev->fileop_lock))
592 return -ERESTARTSYS;
593
594 if (dev->state & DEV_DISCONNECTED) {
595 em28xx_videodbg("mmap: device not present\n");
596 mutex_unlock(&dev->fileop_lock);
597 return -ENODEV;
598 }
599
600 if (dev->state & DEV_MISCONFIGURED) {
601 em28xx_videodbg ("mmap: Device is misconfigured; close and "
602 "open it again\n");
603 mutex_unlock(&dev->fileop_lock);
604 return -EIO;
605 }
606
607 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
608 size != PAGE_ALIGN(dev->frame[0].buf.length)) {
609 mutex_unlock(&dev->fileop_lock);
610 return -EINVAL;
611 }
612
613 for (i = 0; i < dev->num_frames; i++) {
614 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
615 break;
616 }
617 if (i == dev->num_frames) {
618 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
619 mutex_unlock(&dev->fileop_lock);
620 return -EINVAL;
621 }
622
623 /* VM_IO is eventually going to replace PageReserved altogether */
624 vma->vm_flags |= VM_IO;
625 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
626
627 pos = dev->frame[i].bufmem;
628 while (size > 0) { /* size is page-aligned */
629 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
630 em28xx_videodbg("mmap: vm_insert_page failed\n");
631 mutex_unlock(&dev->fileop_lock);
632 return -EAGAIN;
633 }
634 start += PAGE_SIZE;
635 pos += PAGE_SIZE;
636 size -= PAGE_SIZE;
637 }
638
639 vma->vm_ops = &em28xx_vm_ops;
640 vma->vm_private_data = &dev->frame[i];
641
642 em28xx_vm_open(vma);
643 mutex_unlock(&dev->fileop_lock);
644 return 0;
645 }
646
647 /*
648 * em28xx_get_ctrl()
649 * return the current saturation, brightness or contrast, mute state
650 */
651 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
652 {
653 switch (ctrl->id) {
654 case V4L2_CID_AUDIO_MUTE:
655 ctrl->value = dev->mute;
656 return 0;
657 case V4L2_CID_AUDIO_VOLUME:
658 ctrl->value = dev->volume;
659 return 0;
660 default:
661 return -EINVAL;
662 }
663 }
664
665 /*
666 * em28xx_set_ctrl()
667 * mute or set new saturation, brightness or contrast
668 */
669 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
670 {
671 switch (ctrl->id) {
672 case V4L2_CID_AUDIO_MUTE:
673 if (ctrl->value != dev->mute) {
674 dev->mute = ctrl->value;
675 em28xx_audio_usb_mute(dev, ctrl->value);
676 return em28xx_audio_analog_set(dev);
677 }
678 return 0;
679 case V4L2_CID_AUDIO_VOLUME:
680 dev->volume = ctrl->value;
681 return em28xx_audio_analog_set(dev);
682 default:
683 return -EINVAL;
684 }
685 }
686
687 /*
688 * em28xx_stream_interrupt()
689 * stops streaming
690 */
691 static int em28xx_stream_interrupt(struct em28xx *dev)
692 {
693 int ret = 0;
694
695 /* stop reading from the device */
696
697 dev->stream = STREAM_INTERRUPT;
698 ret = wait_event_timeout(dev->wait_stream,
699 (dev->stream == STREAM_OFF) ||
700 (dev->state & DEV_DISCONNECTED),
701 EM28XX_URB_TIMEOUT);
702 if (dev->state & DEV_DISCONNECTED)
703 return -ENODEV;
704 else if (ret) {
705 dev->state |= DEV_MISCONFIGURED;
706 em28xx_videodbg("device is misconfigured; close and "
707 "open /dev/video%d again\n",
708 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
709 return ret;
710 }
711
712 return 0;
713 }
714
715 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
716 {
717 unsigned int hscale, vscale;
718 unsigned int maxh, maxw;
719
720 maxw = norm_maxw(dev);
721 maxh = norm_maxh(dev);
722
723 /* width must even because of the YUYV format */
724 /* height must be even because of interlacing */
725 height &= 0xfffe;
726 width &= 0xfffe;
727
728 if (height < 32)
729 height = 32;
730 if (height > maxh)
731 height = maxh;
732 if (width < 48)
733 width = 48;
734 if (width > maxw)
735 width = maxw;
736
737 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
738 hscale = 0x3fff;
739 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
740
741 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
742 vscale = 0x3fff;
743 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
744
745 /* set new image size */
746 dev->width = width;
747 dev->height = height;
748 dev->frame_size = dev->width * dev->height * 2;
749 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
750 dev->bytesperline = dev->width * 2;
751 dev->hscale = hscale;
752 dev->vscale = vscale;
753
754 em28xx_resolution_set(dev);
755
756 return 0;
757 }
758
759 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
760 {
761 em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
762 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
763 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
764 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
765 "V4L2_BUF_TYPE_VBI_CAPTURE" :
766 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
767 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
768 "not supported");
769
770 switch (format->type) {
771 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
772 {
773 format->fmt.pix.width = dev->width;
774 format->fmt.pix.height = dev->height;
775 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
776 format->fmt.pix.bytesperline = dev->bytesperline;
777 format->fmt.pix.sizeimage = dev->frame_size;
778 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
779 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
780
781 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
782 dev->height);
783 break;
784 }
785
786 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
787 {
788 format->fmt.sliced.service_set=0;
789
790 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
791
792 if (format->fmt.sliced.service_set==0)
793 return -EINVAL;
794
795 break;
796 }
797
798 default:
799 return -EINVAL;
800 }
801 return (0);
802 }
803
804 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
805 {
806 u32 i;
807 int ret = 0;
808 int width = format->fmt.pix.width;
809 int height = format->fmt.pix.height;
810 unsigned int hscale, vscale;
811 unsigned int maxh, maxw;
812
813 maxw = norm_maxw(dev);
814 maxh = norm_maxh(dev);
815
816 em28xx_videodbg("%s: type=%s\n",
817 cmd == VIDIOC_TRY_FMT ?
818 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
819 format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
820 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
821 format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
822 "V4L2_BUF_TYPE_VBI_CAPTURE " :
823 "not supported");
824
825 if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
826 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
827
828 if (format->fmt.sliced.service_set==0)
829 return -EINVAL;
830
831 return 0;
832 }
833
834
835 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
836 return -EINVAL;
837
838 em28xx_videodbg("%s: requested %dx%d\n",
839 cmd == VIDIOC_TRY_FMT ?
840 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
841 format->fmt.pix.width, format->fmt.pix.height);
842
843 /* FIXME: Move some code away from here */
844 /* width must even because of the YUYV format */
845 /* height must be even because of interlacing */
846 height &= 0xfffe;
847 width &= 0xfffe;
848
849 if (height < 32)
850 height = 32;
851 if (height > maxh)
852 height = maxh;
853 if (width < 48)
854 width = 48;
855 if (width > maxw)
856 width = maxw;
857
858 if(dev->is_em2800){
859 /* the em2800 can only scale down to 50% */
860 if(height % (maxh / 2))
861 height=maxh;
862 if(width % (maxw / 2))
863 width=maxw;
864 /* according to empiatech support */
865 /* the MaxPacketSize is to small to support */
866 /* framesizes larger than 640x480 @ 30 fps */
867 /* or 640x576 @ 25 fps. As this would cut */
868 /* of a part of the image we prefer */
869 /* 360x576 or 360x480 for now */
870 if(width == maxw && height == maxh)
871 width /= 2;
872 }
873
874 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
875 hscale = 0x3fff;
876
877 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
878
879 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
880 vscale = 0x3fff;
881
882 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
883
884 format->fmt.pix.width = width;
885 format->fmt.pix.height = height;
886 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
887 format->fmt.pix.bytesperline = width * 2;
888 format->fmt.pix.sizeimage = width * 2 * height;
889 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
890 format->fmt.pix.field = V4L2_FIELD_INTERLACED;
891
892 em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
893 cmd == VIDIOC_TRY_FMT ?
894 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
895 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
896
897 if (cmd == VIDIOC_TRY_FMT)
898 return 0;
899
900 for (i = 0; i < dev->num_frames; i++)
901 if (dev->frame[i].vma_use_count) {
902 em28xx_videodbg("VIDIOC_S_FMT failed. "
903 "Unmap the buffers first.\n");
904 return -EINVAL;
905 }
906
907 /* stop io in case it is already in progress */
908 if (dev->stream == STREAM_ON) {
909 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
910 if ((ret = em28xx_stream_interrupt(dev)))
911 return ret;
912 }
913
914 em28xx_release_buffers(dev);
915 dev->io = IO_NONE;
916
917 /* set new image size */
918 dev->width = width;
919 dev->height = height;
920 dev->frame_size = dev->width * dev->height * 2;
921 dev->field_size = dev->frame_size >> 1;
922 dev->bytesperline = dev->width * 2;
923 dev->hscale = hscale;
924 dev->vscale = vscale;
925 em28xx_uninit_isoc(dev);
926 em28xx_set_alternate(dev);
927 em28xx_capture_start(dev, 1);
928 em28xx_resolution_set(dev);
929 em28xx_init_isoc(dev);
930
931 return 0;
932 }
933
934 /*
935 * em28xx_v4l2_do_ioctl()
936 * This function is _not_ called directly, but from
937 * em28xx_v4l2_ioctl. Userspace
938 * copying is done already, arg is a kernel pointer.
939 */
940 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
941 struct em28xx *dev, unsigned int cmd, void *arg,
942 v4l2_kioctl driver_ioctl)
943 {
944 int ret;
945
946 switch (cmd) {
947 /* ---------- tv norms ---------- */
948 case VIDIOC_ENUMSTD:
949 {
950 struct v4l2_standard *e = arg;
951 unsigned int i;
952
953 i = e->index;
954 if (i >= TVNORMS)
955 return -EINVAL;
956 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
957 tvnorms[e->index].name);
958 e->index = i;
959 if (ret < 0)
960 return ret;
961 return 0;
962 }
963 case VIDIOC_G_STD:
964 {
965 v4l2_std_id *id = arg;
966
967 *id = dev->tvnorm->id;
968 return 0;
969 }
970 case VIDIOC_S_STD:
971 {
972 v4l2_std_id *id = arg;
973 unsigned int i;
974
975 for (i = 0; i < TVNORMS; i++)
976 if (*id == tvnorms[i].id)
977 break;
978 if (i == TVNORMS)
979 for (i = 0; i < TVNORMS; i++)
980 if (*id & tvnorms[i].id)
981 break;
982 if (i == TVNORMS)
983 return -EINVAL;
984
985 mutex_lock(&dev->lock);
986 dev->tvnorm = &tvnorms[i];
987
988 em28xx_set_norm(dev, dev->width, dev->height);
989
990 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
991 &dev->tvnorm->id);
992
993 mutex_unlock(&dev->lock);
994
995 return 0;
996 }
997
998 /* ------ input switching ---------- */
999 case VIDIOC_ENUMINPUT:
1000 {
1001 struct v4l2_input *i = arg;
1002 unsigned int n;
1003 static const char *iname[] = {
1004 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1005 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1006 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1007 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1008 [EM28XX_VMUX_SVIDEO] = "S-Video",
1009 [EM28XX_VMUX_TELEVISION] = "Television",
1010 [EM28XX_VMUX_CABLE] = "Cable TV",
1011 [EM28XX_VMUX_DVB] = "DVB",
1012 [EM28XX_VMUX_DEBUG] = "for debug only",
1013 };
1014
1015 n = i->index;
1016 if (n >= MAX_EM28XX_INPUT)
1017 return -EINVAL;
1018 if (0 == INPUT(n)->type)
1019 return -EINVAL;
1020 memset(i, 0, sizeof(*i));
1021 i->index = n;
1022 i->type = V4L2_INPUT_TYPE_CAMERA;
1023 strcpy(i->name, iname[INPUT(n)->type]);
1024 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1025 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1026 i->type = V4L2_INPUT_TYPE_TUNER;
1027 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1028 i->std |= tvnorms[n].id;
1029 return 0;
1030 }
1031 case VIDIOC_G_INPUT:
1032 {
1033 int *i = arg;
1034 *i = dev->ctl_input;
1035
1036 return 0;
1037 }
1038 case VIDIOC_S_INPUT:
1039 {
1040 int *index = arg;
1041
1042 if (*index >= MAX_EM28XX_INPUT)
1043 return -EINVAL;
1044 if (0 == INPUT(*index)->type)
1045 return -EINVAL;
1046
1047 mutex_lock(&dev->lock);
1048 video_mux(dev, *index);
1049 mutex_unlock(&dev->lock);
1050
1051 return 0;
1052 }
1053 case VIDIOC_G_AUDIO:
1054 {
1055 struct v4l2_audio *a = arg;
1056 unsigned int index = a->index;
1057
1058 if (a->index > 1)
1059 return -EINVAL;
1060 memset(a, 0, sizeof(*a));
1061 index = dev->ctl_ainput;
1062
1063 if (index == 0) {
1064 strcpy(a->name, "Television");
1065 } else {
1066 strcpy(a->name, "Line In");
1067 }
1068 a->capability = V4L2_AUDCAP_STEREO;
1069 a->index = index;
1070 return 0;
1071 }
1072 case VIDIOC_S_AUDIO:
1073 {
1074 struct v4l2_audio *a = arg;
1075
1076 if (a->index != dev->ctl_ainput)
1077 return -EINVAL;
1078
1079 return 0;
1080 }
1081
1082 /* --- controls ---------------------------------------------- */
1083 case VIDIOC_QUERYCTRL:
1084 {
1085 struct v4l2_queryctrl *qc = arg;
1086 int i, id=qc->id;
1087
1088 memset(qc,0,sizeof(*qc));
1089 qc->id=id;
1090
1091 if (!dev->has_msp34xx) {
1092 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1093 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1094 memcpy(qc, &(em28xx_qctrl[i]),
1095 sizeof(*qc));
1096 return 0;
1097 }
1098 }
1099 }
1100 em28xx_i2c_call_clients(dev,cmd,qc);
1101 if (qc->type)
1102 return 0;
1103 else
1104 return -EINVAL;
1105 }
1106 case VIDIOC_G_CTRL:
1107 {
1108 struct v4l2_control *ctrl = arg;
1109 int retval=-EINVAL;
1110
1111 if (!dev->has_msp34xx)
1112 retval=em28xx_get_ctrl(dev, ctrl);
1113 if (retval==-EINVAL) {
1114 em28xx_i2c_call_clients(dev,cmd,arg);
1115 return 0;
1116 } else return retval;
1117 }
1118 case VIDIOC_S_CTRL:
1119 {
1120 struct v4l2_control *ctrl = arg;
1121 u8 i;
1122
1123 if (!dev->has_msp34xx){
1124 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1125 if (ctrl->id == em28xx_qctrl[i].id) {
1126 if (ctrl->value <
1127 em28xx_qctrl[i].minimum
1128 || ctrl->value >
1129 em28xx_qctrl[i].maximum)
1130 return -ERANGE;
1131 return em28xx_set_ctrl(dev, ctrl);
1132 }
1133 }
1134 }
1135
1136 em28xx_i2c_call_clients(dev,cmd,arg);
1137 return 0;
1138 }
1139 /* --- tuner ioctls ------------------------------------------ */
1140 case VIDIOC_G_TUNER:
1141 {
1142 struct v4l2_tuner *t = arg;
1143
1144 if (0 != t->index)
1145 return -EINVAL;
1146
1147 memset(t, 0, sizeof(*t));
1148 strcpy(t->name, "Tuner");
1149 mutex_lock(&dev->lock);
1150 /* let clients fill in the remainder of this struct */
1151 em28xx_i2c_call_clients(dev, cmd, t);
1152 mutex_unlock(&dev->lock);
1153 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1154 t->afc);
1155 return 0;
1156 }
1157 case VIDIOC_S_TUNER:
1158 {
1159 struct v4l2_tuner *t = arg;
1160
1161 if (0 != t->index)
1162 return -EINVAL;
1163 mutex_lock(&dev->lock);
1164 /* let clients handle this */
1165 em28xx_i2c_call_clients(dev, cmd, t);
1166 mutex_unlock(&dev->lock);
1167 return 0;
1168 }
1169 case VIDIOC_G_FREQUENCY:
1170 {
1171 struct v4l2_frequency *f = arg;
1172
1173 memset(f, 0, sizeof(*f));
1174 f->type = V4L2_TUNER_ANALOG_TV;
1175 f->frequency = dev->ctl_freq;
1176
1177 return 0;
1178 }
1179 case VIDIOC_S_FREQUENCY:
1180 {
1181 struct v4l2_frequency *f = arg;
1182
1183 if (0 != f->tuner)
1184 return -EINVAL;
1185
1186 if (V4L2_TUNER_ANALOG_TV != f->type)
1187 return -EINVAL;
1188
1189 mutex_lock(&dev->lock);
1190 dev->ctl_freq = f->frequency;
1191 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1192 mutex_unlock(&dev->lock);
1193 return 0;
1194 }
1195 case VIDIOC_CROPCAP:
1196 {
1197 struct v4l2_cropcap *cc = arg;
1198
1199 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1200 return -EINVAL;
1201 cc->bounds.left = 0;
1202 cc->bounds.top = 0;
1203 cc->bounds.width = dev->width;
1204 cc->bounds.height = dev->height;
1205 cc->defrect = cc->bounds;
1206 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1207 cc->pixelaspect.denominator = 59;
1208 return 0;
1209 }
1210 case VIDIOC_STREAMON:
1211 {
1212 int *type = arg;
1213
1214 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1215 || dev->io != IO_MMAP)
1216 return -EINVAL;
1217
1218 if (list_empty(&dev->inqueue))
1219 return -EINVAL;
1220
1221 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
1222
1223 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1224
1225 return 0;
1226 }
1227 case VIDIOC_STREAMOFF:
1228 {
1229 int *type = arg;
1230 int ret;
1231
1232 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1233 || dev->io != IO_MMAP)
1234 return -EINVAL;
1235
1236 if (dev->stream == STREAM_ON) {
1237 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1238 if ((ret = em28xx_stream_interrupt(dev)))
1239 return ret;
1240 }
1241 em28xx_empty_framequeues(dev);
1242
1243 return 0;
1244 }
1245 default:
1246 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1247 driver_ioctl);
1248 }
1249 return 0;
1250 }
1251
1252 /*
1253 * em28xx_v4l2_do_ioctl()
1254 * This function is _not_ called directly, but from
1255 * em28xx_v4l2_ioctl. Userspace
1256 * copying is done already, arg is a kernel pointer.
1257 */
1258 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1259 unsigned int cmd, void *arg)
1260 {
1261 struct em28xx *dev = filp->private_data;
1262
1263 if (!dev)
1264 return -ENODEV;
1265
1266 if (video_debug > 1)
1267 v4l_print_ioctl(dev->name,cmd);
1268
1269 switch (cmd) {
1270
1271 /* --- capabilities ------------------------------------------ */
1272 case VIDIOC_QUERYCAP:
1273 {
1274 struct v4l2_capability *cap = arg;
1275
1276 memset(cap, 0, sizeof(*cap));
1277 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1278 strlcpy(cap->card, em28xx_boards[dev->model].name,
1279 sizeof(cap->card));
1280 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1281 sizeof(cap->bus_info));
1282 cap->version = EM28XX_VERSION_CODE;
1283 cap->capabilities =
1284 V4L2_CAP_SLICED_VBI_CAPTURE |
1285 V4L2_CAP_VIDEO_CAPTURE |
1286 V4L2_CAP_AUDIO |
1287 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1288 if (dev->has_tuner)
1289 cap->capabilities |= V4L2_CAP_TUNER;
1290 return 0;
1291 }
1292 /* --- capture ioctls ---------------------------------------- */
1293 case VIDIOC_ENUM_FMT:
1294 {
1295 struct v4l2_fmtdesc *fmtd = arg;
1296
1297 if (fmtd->index != 0)
1298 return -EINVAL;
1299 memset(fmtd, 0, sizeof(*fmtd));
1300 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1301 strcpy(fmtd->description, "Packed YUY2");
1302 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1303 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1304 return 0;
1305 }
1306 case VIDIOC_G_FMT:
1307 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1308
1309 case VIDIOC_TRY_FMT:
1310 case VIDIOC_S_FMT:
1311 return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1312
1313 case VIDIOC_REQBUFS:
1314 {
1315 struct v4l2_requestbuffers *rb = arg;
1316 u32 i;
1317 int ret;
1318
1319 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1320 rb->memory != V4L2_MEMORY_MMAP)
1321 return -EINVAL;
1322
1323 if (dev->io == IO_READ) {
1324 em28xx_videodbg ("method is set to read;"
1325 " close and open the device again to"
1326 " choose the mmap I/O method\n");
1327 return -EINVAL;
1328 }
1329
1330 for (i = 0; i < dev->num_frames; i++)
1331 if (dev->frame[i].vma_use_count) {
1332 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1333 return -EINVAL;
1334 }
1335
1336 if (dev->stream == STREAM_ON) {
1337 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1338 if ((ret = em28xx_stream_interrupt(dev)))
1339 return ret;
1340 }
1341
1342 em28xx_empty_framequeues(dev);
1343
1344 em28xx_release_buffers(dev);
1345 if (rb->count)
1346 rb->count =
1347 em28xx_request_buffers(dev, rb->count);
1348
1349 dev->frame_current = NULL;
1350
1351 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1352 rb->count);
1353 dev->io = rb->count ? IO_MMAP : IO_NONE;
1354 return 0;
1355 }
1356 case VIDIOC_QUERYBUF:
1357 {
1358 struct v4l2_buffer *b = arg;
1359
1360 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1361 b->index >= dev->num_frames || dev->io != IO_MMAP)
1362 return -EINVAL;
1363
1364 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1365
1366 if (dev->frame[b->index].vma_use_count) {
1367 b->flags |= V4L2_BUF_FLAG_MAPPED;
1368 }
1369 if (dev->frame[b->index].state == F_DONE)
1370 b->flags |= V4L2_BUF_FLAG_DONE;
1371 else if (dev->frame[b->index].state != F_UNUSED)
1372 b->flags |= V4L2_BUF_FLAG_QUEUED;
1373 return 0;
1374 }
1375 case VIDIOC_QBUF:
1376 {
1377 struct v4l2_buffer *b = arg;
1378 unsigned long lock_flags;
1379
1380 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1381 b->index >= dev->num_frames || dev->io != IO_MMAP) {
1382 return -EINVAL;
1383 }
1384
1385 if (dev->frame[b->index].state != F_UNUSED) {
1386 return -EAGAIN;
1387 }
1388 dev->frame[b->index].state = F_QUEUED;
1389
1390 /* add frame to fifo */
1391 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1392 list_add_tail(&dev->frame[b->index].frame,
1393 &dev->inqueue);
1394 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1395
1396 return 0;
1397 }
1398 case VIDIOC_DQBUF:
1399 {
1400 struct v4l2_buffer *b = arg;
1401 struct em28xx_frame_t *f;
1402 unsigned long lock_flags;
1403 int ret = 0;
1404
1405 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1406 || dev->io != IO_MMAP)
1407 return -EINVAL;
1408
1409 if (list_empty(&dev->outqueue)) {
1410 if (dev->stream == STREAM_OFF)
1411 return -EINVAL;
1412 if (filp->f_flags & O_NONBLOCK)
1413 return -EAGAIN;
1414 ret = wait_event_interruptible
1415 (dev->wait_frame,
1416 (!list_empty(&dev->outqueue)) ||
1417 (dev->state & DEV_DISCONNECTED));
1418 if (ret)
1419 return ret;
1420 if (dev->state & DEV_DISCONNECTED)
1421 return -ENODEV;
1422 }
1423
1424 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1425 f = list_entry(dev->outqueue.next,
1426 struct em28xx_frame_t, frame);
1427 list_del(dev->outqueue.next);
1428 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1429
1430 f->state = F_UNUSED;
1431 memcpy(b, &f->buf, sizeof(*b));
1432
1433 if (f->vma_use_count)
1434 b->flags |= V4L2_BUF_FLAG_MAPPED;
1435
1436 return 0;
1437 }
1438 default:
1439 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1440 em28xx_video_do_ioctl);
1441 }
1442 return 0;
1443 }
1444
1445 /*
1446 * em28xx_v4l2_ioctl()
1447 * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1448 */
1449 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1450 unsigned int cmd, unsigned long arg)
1451 {
1452 int ret = 0;
1453 struct em28xx *dev = filp->private_data;
1454
1455 if (mutex_lock_interruptible(&dev->fileop_lock))
1456 return -ERESTARTSYS;
1457
1458 if (dev->state & DEV_DISCONNECTED) {
1459 em28xx_errdev("v4l2 ioctl: device not present\n");
1460 mutex_unlock(&dev->fileop_lock);
1461 return -ENODEV;
1462 }
1463
1464 if (dev->state & DEV_MISCONFIGURED) {
1465 em28xx_errdev
1466 ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1467 mutex_unlock(&dev->fileop_lock);
1468 return -EIO;
1469 }
1470
1471 ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1472
1473 mutex_unlock(&dev->fileop_lock);
1474
1475 return ret;
1476 }
1477
1478 static const struct file_operations em28xx_v4l_fops = {
1479 .owner = THIS_MODULE,
1480 .open = em28xx_v4l2_open,
1481 .release = em28xx_v4l2_close,
1482 .ioctl = em28xx_v4l2_ioctl,
1483 .read = em28xx_v4l2_read,
1484 .poll = em28xx_v4l2_poll,
1485 .mmap = em28xx_v4l2_mmap,
1486 .llseek = no_llseek,
1487 .compat_ioctl = v4l_compat_ioctl32,
1488
1489 };
1490
1491 /******************************** usb interface *****************************************/
1492
1493 /*
1494 * em28xx_init_dev()
1495 * allocates and inits the device structs, registers i2c bus and v4l device
1496 */
1497 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1498 int minor, int model)
1499 {
1500 struct em28xx *dev = *devhandle;
1501 int retval = -ENOMEM;
1502 int errCode, i;
1503 unsigned int maxh, maxw;
1504
1505 dev->udev = udev;
1506 dev->model = model;
1507 mutex_init(&dev->lock);
1508 init_waitqueue_head(&dev->open);
1509
1510 dev->em28xx_write_regs = em28xx_write_regs;
1511 dev->em28xx_read_reg = em28xx_read_reg;
1512 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1513 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1514 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1515 dev->is_em2800 = em28xx_boards[model].is_em2800;
1516 dev->has_tuner = em28xx_boards[model].has_tuner;
1517 dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1518 dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1519 dev->decoder = em28xx_boards[model].decoder;
1520
1521 if (tuner >= 0)
1522 dev->tuner_type = tuner;
1523 else
1524 dev->tuner_type = em28xx_boards[model].tuner_type;
1525
1526 dev->video_inputs = em28xx_boards[model].vchannels;
1527
1528 for (i = 0; i < TVNORMS; i++)
1529 if (em28xx_boards[model].norm == tvnorms[i].mode)
1530 break;
1531 if (i == TVNORMS)
1532 i = 0;
1533
1534 dev->tvnorm = &tvnorms[i]; /* set default norm */
1535
1536 em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1537
1538 maxw = norm_maxw(dev);
1539 maxh = norm_maxh(dev);
1540
1541 /* set default image size */
1542 dev->width = maxw;
1543 dev->height = maxh;
1544 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1545 dev->field_size = dev->width * dev->height;
1546 dev->frame_size =
1547 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1548 dev->bytesperline = dev->width * 2;
1549 dev->hscale = 0;
1550 dev->vscale = 0;
1551 dev->ctl_input = 2;
1552
1553 /* setup video picture settings for saa7113h */
1554 memset(&dev->vpic, 0, sizeof(dev->vpic));
1555 dev->vpic.colour = 128 << 8;
1556 dev->vpic.hue = 128 << 8;
1557 dev->vpic.brightness = 128 << 8;
1558 dev->vpic.contrast = 192 << 8;
1559 dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1560 dev->vpic.depth = 16;
1561 dev->vpic.palette = VIDEO_PALETTE_YUV422;
1562
1563 em28xx_pre_card_setup(dev);
1564 #ifdef CONFIG_MODULES
1565 /* request some modules */
1566 if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1567 request_module("saa7115");
1568 if (dev->decoder == EM28XX_TVP5150)
1569 request_module("tvp5150");
1570 if (dev->has_tuner)
1571 request_module("tuner");
1572 #endif
1573 errCode = em28xx_config(dev);
1574 if (errCode) {
1575 em28xx_errdev("error configuring device\n");
1576 em28xx_devused&=~(1<<dev->devno);
1577 kfree(dev);
1578 return -ENOMEM;
1579 }
1580
1581 mutex_lock(&dev->lock);
1582 /* register i2c bus */
1583 em28xx_i2c_register(dev);
1584
1585 /* Do board specific init and eeprom reading */
1586 em28xx_card_setup(dev);
1587
1588 /* configure the device */
1589 em28xx_config_i2c(dev);
1590
1591 mutex_unlock(&dev->lock);
1592
1593 errCode = em28xx_config(dev);
1594
1595 #ifdef CONFIG_MODULES
1596 if (dev->has_msp34xx)
1597 request_module("msp3400");
1598 #endif
1599 /* allocate and fill v4l2 device struct */
1600 dev->vdev = video_device_alloc();
1601 if (NULL == dev->vdev) {
1602 em28xx_errdev("cannot allocate video_device.\n");
1603 em28xx_devused&=~(1<<dev->devno);
1604 kfree(dev);
1605 return -ENOMEM;
1606 }
1607
1608 dev->vbi_dev = video_device_alloc();
1609 if (NULL == dev->vbi_dev) {
1610 em28xx_errdev("cannot allocate video_device.\n");
1611 kfree(dev->vdev);
1612 em28xx_devused&=~(1<<dev->devno);
1613 kfree(dev);
1614 return -ENOMEM;
1615 }
1616
1617 /* Fills VBI device info */
1618 dev->vbi_dev->type = VFL_TYPE_VBI;
1619 dev->vbi_dev->fops = &em28xx_v4l_fops;
1620 dev->vbi_dev->minor = -1;
1621 dev->vbi_dev->dev = &dev->udev->dev;
1622 dev->vbi_dev->release = video_device_release;
1623 snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1624 "em28xx",dev->devno,"vbi");
1625
1626 /* Fills CAPTURE device info */
1627 dev->vdev->type = VID_TYPE_CAPTURE;
1628 if (dev->has_tuner)
1629 dev->vdev->type |= VID_TYPE_TUNER;
1630 dev->vdev->fops = &em28xx_v4l_fops;
1631 dev->vdev->minor = -1;
1632 dev->vdev->dev = &dev->udev->dev;
1633 dev->vdev->release = video_device_release;
1634 snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1635 "em28xx",dev->devno,"video");
1636
1637 list_add_tail(&dev->devlist,&em28xx_devlist);
1638
1639 /* register v4l2 device */
1640 mutex_lock(&dev->lock);
1641 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1642 video_nr[dev->devno]))) {
1643 em28xx_errdev("unable to register video device (error=%i).\n",
1644 retval);
1645 mutex_unlock(&dev->lock);
1646 list_del(&dev->devlist);
1647 video_device_release(dev->vdev);
1648 em28xx_devused&=~(1<<dev->devno);
1649 kfree(dev);
1650 return -ENODEV;
1651 }
1652
1653 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1654 vbi_nr[dev->devno]) < 0) {
1655 printk("unable to register vbi device\n");
1656 mutex_unlock(&dev->lock);
1657 list_del(&dev->devlist);
1658 video_device_release(dev->vbi_dev);
1659 video_device_release(dev->vdev);
1660 em28xx_devused&=~(1<<dev->devno);
1661 kfree(dev);
1662 return -ENODEV;
1663 } else {
1664 printk("registered VBI\n");
1665 }
1666
1667 if (dev->has_msp34xx) {
1668 /* Send a reset to other chips via gpio */
1669 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1670 msleep(3);
1671 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1672 msleep(3);
1673
1674 }
1675 video_mux(dev, 0);
1676
1677 mutex_unlock(&dev->lock);
1678
1679 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1680 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1681 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1682
1683 return 0;
1684 }
1685
1686 /*
1687 * em28xx_usb_probe()
1688 * checks for supported devices
1689 */
1690 static int em28xx_usb_probe(struct usb_interface *interface,
1691 const struct usb_device_id *id)
1692 {
1693 const struct usb_endpoint_descriptor *endpoint;
1694 struct usb_device *udev;
1695 struct usb_interface *uif;
1696 struct em28xx *dev = NULL;
1697 int retval = -ENODEV;
1698 int model,i,nr,ifnum;
1699
1700 udev = usb_get_dev(interface_to_usbdev(interface));
1701 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1702
1703 /* Check to see next free device and mark as used */
1704 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1705 em28xx_devused|=1<<nr;
1706
1707 /* Don't register audio interfaces */
1708 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1709 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1710 udev->descriptor.idVendor,udev->descriptor.idProduct,
1711 ifnum,
1712 interface->altsetting[0].desc.bInterfaceClass);
1713
1714 em28xx_devused&=~(1<<nr);
1715 return -ENODEV;
1716 }
1717
1718 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1719 udev->descriptor.idVendor,udev->descriptor.idProduct,
1720 ifnum,
1721 interface->altsetting[0].desc.bInterfaceClass);
1722
1723 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1724
1725 /* check if the device has the iso in endpoint at the correct place */
1726 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1727 USB_ENDPOINT_XFER_ISOC) {
1728 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1729 em28xx_devused&=~(1<<nr);
1730 return -ENODEV;
1731 }
1732 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1733 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1734 em28xx_devused&=~(1<<nr);
1735 return -ENODEV;
1736 }
1737
1738 model=id->driver_info;
1739
1740 if (nr >= EM28XX_MAXBOARDS) {
1741 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1742 em28xx_devused&=~(1<<nr);
1743 return -ENOMEM;
1744 }
1745
1746 /* allocate memory for our device state and initialize it */
1747 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1748 if (dev == NULL) {
1749 em28xx_err(DRIVER_NAME ": out of memory!\n");
1750 em28xx_devused&=~(1<<nr);
1751 return -ENOMEM;
1752 }
1753
1754 snprintf(dev->name, 29, "em28xx #%d", nr);
1755 dev->devno=nr;
1756
1757 /* compute alternate max packet sizes */
1758 uif = udev->actconfig->interface[0];
1759
1760 dev->num_alt=uif->num_altsetting;
1761 em28xx_info("Alternate settings: %i\n",dev->num_alt);
1762 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1763 dev->alt_max_pkt_size = kmalloc(32*
1764 dev->num_alt,GFP_KERNEL);
1765 if (dev->alt_max_pkt_size == NULL) {
1766 em28xx_errdev("out of memory!\n");
1767 em28xx_devused&=~(1<<nr);
1768 kfree(dev);
1769 return -ENOMEM;
1770 }
1771
1772 for (i = 0; i < dev->num_alt ; i++) {
1773 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1774 wMaxPacketSize);
1775 dev->alt_max_pkt_size[i] =
1776 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1777 em28xx_info("Alternate setting %i, max size= %i\n",i,
1778 dev->alt_max_pkt_size[i]);
1779 }
1780
1781 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1782 model=card[nr];
1783
1784 if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1785 em28xx_errdev("Your board has no unique USB ID and thus can't be autodetected.\n");
1786 em28xx_errdev("Please pass card=<n> insmod option to workaround that.\n");
1787 em28xx_errdev("If there isn't any card number for you, please send an email to:\n");
1788 em28xx_errdev("\tV4L Mailing List <video4linux-list@redhat.com>\n");
1789 em28xx_errdev("Here is a list of valid choices for the card=<n> insmod option:\n");
1790 for (i = 0; i < em28xx_bcount; i++) {
1791 em28xx_errdev(" card=%d -> %s\n", i,
1792 em28xx_boards[i].name);
1793 }
1794 }
1795
1796 /* allocate device struct */
1797 retval = em28xx_init_dev(&dev, udev, nr, model);
1798 if (retval)
1799 return retval;
1800
1801 em28xx_info("Found %s\n", em28xx_boards[model].name);
1802
1803 /* save our data pointer in this interface device */
1804 usb_set_intfdata(interface, dev);
1805 return 0;
1806 }
1807
1808 /*
1809 * em28xx_usb_disconnect()
1810 * called when the device gets diconencted
1811 * video device will be unregistered on v4l2_close in case it is still open
1812 */
1813 static void em28xx_usb_disconnect(struct usb_interface *interface)
1814 {
1815 struct em28xx *dev = usb_get_intfdata(interface);
1816 usb_set_intfdata(interface, NULL);
1817
1818 if (!dev)
1819 return;
1820
1821 down_write(&em28xx_disconnect);
1822
1823 mutex_lock(&dev->lock);
1824
1825 em28xx_info("disconnecting %s\n", dev->vdev->name);
1826
1827 wake_up_interruptible_all(&dev->open);
1828
1829 if (dev->users) {
1830 em28xx_warn
1831 ("device /dev/video%d is open! Deregistration and memory "
1832 "deallocation are deferred on close.\n",
1833 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1834
1835 dev->state |= DEV_MISCONFIGURED;
1836 em28xx_uninit_isoc(dev);
1837 dev->state |= DEV_DISCONNECTED;
1838 wake_up_interruptible(&dev->wait_frame);
1839 wake_up_interruptible(&dev->wait_stream);
1840 } else {
1841 dev->state |= DEV_DISCONNECTED;
1842 em28xx_release_resources(dev);
1843 }
1844
1845 mutex_unlock(&dev->lock);
1846
1847 if (!dev->users) {
1848 kfree(dev->alt_max_pkt_size);
1849 kfree(dev);
1850 }
1851
1852 up_write(&em28xx_disconnect);
1853 }
1854
1855 static struct usb_driver em28xx_usb_driver = {
1856 .name = "em28xx",
1857 .probe = em28xx_usb_probe,
1858 .disconnect = em28xx_usb_disconnect,
1859 .id_table = em28xx_id_table,
1860 };
1861
1862 static int __init em28xx_module_init(void)
1863 {
1864 int result;
1865
1866 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1867 (EM28XX_VERSION_CODE >> 16) & 0xff,
1868 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1869 #ifdef SNAPSHOT
1870 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1871 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1872 #endif
1873
1874 /* register this driver with the USB subsystem */
1875 result = usb_register(&em28xx_usb_driver);
1876 if (result)
1877 em28xx_err(DRIVER_NAME
1878 " usb_register failed. Error number %d.\n", result);
1879
1880 return result;
1881 }
1882
1883 static void __exit em28xx_module_exit(void)
1884 {
1885 /* deregister this driver with the USB subsystem */
1886 usb_deregister(&em28xx_usb_driver);
1887 }
1888
1889 module_init(em28xx_module_init);
1890 module_exit(em28xx_module_exit);
kernel-based virtual machine