]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/media/video/em28xx/em28xx-video.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[PATCH] v4l: 716: support for em28xx board family
[mirror_ubuntu-jammy-kernel.git] / drivers / media / video / em28xx / em28xx-video.c
1 /*
2 em2820-video.c - driver for Empia EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
5 Ludovico Cavedon <cavedon@sssup.it>
6 Mauro Carvalho Chehab <mchehab@brturbo.com.br>
7
8 Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include <linux/init.h>
26 #include <linux/list.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/usb.h>
30 #include <linux/videodev.h>
31 #include <linux/i2c.h>
32 #include <media/tuner.h>
33 #include <linux/video_decoder.h>
34
35 #include "em2820.h"
36
37 #define DRIVER_AUTHOR "Markus Rechberger <mrechberger@gmail.com>, " \
38 "Ludovico Cavedon <cavedon@sssup.it>, " \
39 "Mauro Carvalho Chehab <mchehab@brturbo.com.br>"
40
41 #define DRIVER_NAME "em2820"
42 #define DRIVER_DESC "Empia em2820 based USB video device driver"
43 #define EM2820_VERSION_CODE KERNEL_VERSION(0, 0, 1)
44
45 #define em2820_videodbg(fmt, arg...) do {\
46 if (video_debug) \
47 printk(KERN_INFO "%s %s :"fmt, \
48 dev->name, __FUNCTION__ , ##arg); } while (0)
49
50 MODULE_AUTHOR(DRIVER_AUTHOR);
51 MODULE_DESCRIPTION(DRIVER_DESC);
52 MODULE_LICENSE("GPL");
53
54 static int tuner = -1;
55 module_param(tuner, int, 0444);
56 MODULE_PARM_DESC(tuner, "tuner type");
57
58 static unsigned int video_debug = 0;
59 module_param(video_debug,int,0644);
60 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
61
62 /* supported tv norms */
63 static struct em2820_tvnorm tvnorms[] = {
64 {
65 .name = "PAL",
66 .id = V4L2_STD_PAL,
67 .mode = VIDEO_MODE_PAL,
68 }, {
69 .name = "NTSC",
70 .id = V4L2_STD_NTSC,
71 .mode = VIDEO_MODE_NTSC,
72 }, {
73 .name = "SECAM",
74 .id = V4L2_STD_SECAM,
75 .mode = VIDEO_MODE_SECAM,
76 }, {
77 .name = "PAL-M",
78 .id = V4L2_STD_PAL_M,
79 .mode = VIDEO_MODE_PAL,
80 }
81 };
82
83 #define TVNORMS ARRAY_SIZE(tvnorms)
84
85 /* supported controls */
86 static struct v4l2_queryctrl em2820_qctrl[] = {
87 {
88 .id = V4L2_CID_BRIGHTNESS,
89 .type = V4L2_CTRL_TYPE_INTEGER,
90 .name = "Brightness",
91 .minimum = -128,
92 .maximum = 127,
93 .step = 1,
94 .default_value = 0,
95 .flags = 0,
96 },{
97 .id = V4L2_CID_CONTRAST,
98 .type = V4L2_CTRL_TYPE_INTEGER,
99 .name = "Contrast",
100 .minimum = 0x0,
101 .maximum = 0x1f,
102 .step = 0x1,
103 .default_value = 0x10,
104 .flags = 0,
105 },{
106 .id = V4L2_CID_SATURATION,
107 .type = V4L2_CTRL_TYPE_INTEGER,
108 .name = "Saturation",
109 .minimum = 0x0,
110 .maximum = 0x1f,
111 .step = 0x1,
112 .default_value = 0x10,
113 .flags = 0,
114 },{
115 .id = V4L2_CID_AUDIO_VOLUME,
116 .type = V4L2_CTRL_TYPE_INTEGER,
117 .name = "Volume",
118 .minimum = 0x0,
119 .maximum = 0x1f,
120 .step = 0x1,
121 .default_value = 0x1f,
122 .flags = 0,
123 },{
124 .id = V4L2_CID_AUDIO_MUTE,
125 .type = V4L2_CTRL_TYPE_BOOLEAN,
126 .name = "Mute",
127 .minimum = 0,
128 .maximum = 1,
129 .step = 1,
130 .default_value = 1,
131 .flags = 0,
132 },{
133 .id = V4L2_CID_RED_BALANCE,
134 .type = V4L2_CTRL_TYPE_INTEGER,
135 .name = "Red chroma balance",
136 .minimum = -128,
137 .maximum = 127,
138 .step = 1,
139 .default_value = 0,
140 .flags = 0,
141 },{
142 .id = V4L2_CID_BLUE_BALANCE,
143 .type = V4L2_CTRL_TYPE_INTEGER,
144 .name = "Blue chroma balance",
145 .minimum = -128,
146 .maximum = 127,
147 .step = 1,
148 .default_value = 0,
149 .flags = 0,
150 },{
151 .id = V4L2_CID_GAMMA,
152 .type = V4L2_CTRL_TYPE_INTEGER,
153 .name = "Gamma",
154 .minimum = 0x0,
155 .maximum = 0x3f,
156 .step = 0x1,
157 .default_value = 0x20,
158 .flags = 0,
159 }
160 };
161
162 static struct usb_driver em2820_usb_driver;
163
164 static DECLARE_MUTEX(em2820_sysfs_lock);
165 static DECLARE_RWSEM(em2820_disconnect);
166
167 /********************* v4l2 interface ******************************************/
168
169 static inline unsigned long kvirt_to_pa(unsigned long adr)
170 {
171 unsigned long kva, ret;
172
173 kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
174 kva |= adr & (PAGE_SIZE - 1);
175 ret = __pa(kva);
176 return ret;
177 }
178
179 /*
180 * em2820_config()
181 * inits registers with sane defaults
182 */
183 static int em2820_config(struct em2820 *dev)
184 {
185
186 /* Sets I2C speed to 100 KHz */
187 em2820_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
188
189 /* enable vbi capturing */
190 em2820_audio_usb_mute(dev, 1);
191 dev->mute = 1; /* maybe not the right place... */
192 dev->volume = 0x1f;
193 em2820_audio_analog_set(dev);
194 em2820_audio_analog_setup(dev);
195 em2820_outfmt_set_yuv422(dev);
196 em2820_colorlevels_set_default(dev);
197 em2820_compression_disable(dev);
198
199 return 0;
200 }
201
202 /*
203 * em2820_config_i2c()
204 * configure i2c attached devices
205 */
206 void em2820_config_i2c(struct em2820 *dev)
207 {
208 struct v4l2_frequency f;
209 struct video_decoder_init em2820_vdi = {.data = NULL };
210
211
212 /* configure decoder */
213 em2820_i2c_call_clients(dev, DECODER_INIT, &em2820_vdi);
214 em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
215 /* em2820_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
216 /* em2820_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
217 /* em2820_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
218 /* em2820_i2c_call_clients(dev,DECODER_DUMP, NULL); */
219
220 /* configure tuner */
221 f.tuner = 0;
222 f.type = V4L2_TUNER_ANALOG_TV;
223 f.frequency = 9076; /* FIXME:remove magic number */
224 dev->ctl_freq = f.frequency;
225 em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
226
227 /* configure tda9887 */
228
229 em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
230
231 /* em2820_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
232 }
233
234 /*
235 * em2820_empty_framequeues()
236 * prepare queues for incoming and outgoing frames
237 */
238 static void em2820_empty_framequeues(struct em2820 *dev)
239 {
240 u32 i;
241
242 INIT_LIST_HEAD(&dev->inqueue);
243 INIT_LIST_HEAD(&dev->outqueue);
244
245 for (i = 0; i < EM2820_NUM_FRAMES; i++) {
246 dev->frame[i].state = F_UNUSED;
247 dev->frame[i].buf.bytesused = 0;
248 }
249 }
250
251 /*
252 * em2820_v4l2_open()
253 * inits the device and starts isoc transfer
254 */
255 static int em2820_v4l2_open(struct inode *inode, struct file *filp)
256 {
257 struct video_device *vdev = video_devdata(filp);
258 int minor = iminor(inode);
259 struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
260 int errCode = 0;
261
262 em2820_videodbg("users=%d", dev->users);
263
264 if (!down_read_trylock(&em2820_disconnect))
265 return -ERESTARTSYS;
266
267 if (dev->users) {
268 em2820_warn("this driver can be opened only once\n");
269 up_read(&em2820_disconnect);
270 return -EBUSY;
271 }
272
273 /* if(dev->vbi_dev->minor == minor){
274 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
275 }*/
276 if (dev->vdev->minor == minor) {
277 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
278 }
279
280 init_MUTEX(&dev->fileop_lock); /* to 1 == available */
281 spin_lock_init(&dev->queue_lock);
282 init_waitqueue_head(&dev->wait_frame);
283 init_waitqueue_head(&dev->wait_stream);
284
285 down(&dev->lock);
286
287 em2820_set_alternate(dev);
288
289 dev->width = norm_maxw(dev);
290 dev->height = norm_maxh(dev);
291 dev->frame_size = dev->width * dev->height * 2;
292 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
293 dev->bytesperline = dev->width * 2;
294 dev->hscale = 0;
295 dev->vscale = 0;
296
297 em2820_capture_start(dev, 1);
298 em2820_resolution_set(dev);
299
300 /* start the transfer */
301 errCode = em2820_init_isoc(dev);
302 if (errCode)
303 goto err;
304
305 dev->users++;
306 filp->private_data = dev;
307 dev->io = IO_NONE;
308 dev->stream = STREAM_OFF;
309 dev->num_frames = 0;
310
311 /* prepare queues */
312 em2820_empty_framequeues(dev);
313
314 dev->state |= DEV_INITIALIZED;
315
316 err:
317 up(&dev->lock);
318 up_read(&em2820_disconnect);
319 return errCode;
320 }
321
322 /*
323 * em2820_realease_resources()
324 * unregisters the v4l2,i2c and usb devices
325 * called when the device gets disconected or at module unload
326 */
327 static void em2820_release_resources(struct em2820 *dev)
328 {
329 down(&em2820_sysfs_lock);
330
331 em2820_info("V4L2 device /dev/video%d deregistered\n",
332 dev->vdev->minor);
333 video_set_drvdata(dev->vdev, NULL);
334 video_unregister_device(dev->vdev);
335 /* video_unregister_device(dev->vbi_dev); */
336 em2820_i2c_unregister(dev);
337 usb_put_dev(dev->udev);
338 up(&em2820_sysfs_lock);
339 }
340
341 /*
342 * em2820_v4l2_close()
343 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
344 */
345 static int em2820_v4l2_close(struct inode *inode, struct file *file)
346 {
347 struct video_device *vdev = video_devdata(file);
348 struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
349 int errCode;
350
351 em2820_videodbg("users=%d", dev->users);
352
353 down(&dev->lock);
354
355 em2820_uninit_isoc(dev);
356
357 em2820_release_buffers(dev);
358
359 /* the device is already disconnect, free the remaining resources */
360 if (dev->state & DEV_DISCONNECTED) {
361 em2820_release_resources(dev);
362 up(&dev->lock);
363 kfree(dev);
364 return 0;
365 }
366
367 /* set alternate 0 */
368 dev->alt = 0;
369 em2820_videodbg("setting alternate 0");
370 errCode = usb_set_interface(dev->udev, 0, 0);
371 if (errCode < 0) {
372 em2820_errdev ("cannot change alternate number to 0 (error=%i)\n",
373 errCode);
374 }
375
376 dev->users--;
377 wake_up_interruptible_nr(&dev->open, 1);
378 up(&dev->lock);
379 return 0;
380 }
381
382 /*
383 * em2820_v4l2_read()
384 * will allocate buffers when called for the first time
385 */
386 static ssize_t
387 em2820_v4l2_read(struct file *filp, char __user * buf, size_t count,
388 loff_t * f_pos)
389 {
390 struct em2820 *dev = video_get_drvdata(video_devdata(filp));
391 struct em2820_frame_t *f, *i;
392 unsigned long lock_flags;
393 int ret = 0;
394
395 if (down_interruptible(&dev->fileop_lock))
396 return -ERESTARTSYS;
397
398 if (dev->state & DEV_DISCONNECTED) {
399 em2820_videodbg("device not present");
400 up(&dev->fileop_lock);
401 return -ENODEV;
402 }
403
404 if (dev->state & DEV_MISCONFIGURED) {
405 em2820_videodbg("device misconfigured; close and open it again");
406 up(&dev->fileop_lock);
407 return -EIO;
408 }
409
410 if (dev->io == IO_MMAP) {
411 em2820_videodbg ("IO method is set to mmap; close and open"
412 " the device again to choose the read method");
413 up(&dev->fileop_lock);
414 return -EINVAL;
415 }
416
417 if (dev->io == IO_NONE) {
418 if (!em2820_request_buffers(dev, EM2820_NUM_READ_FRAMES)) {
419 em2820_errdev("read failed, not enough memory\n");
420 up(&dev->fileop_lock);
421 return -ENOMEM;
422 }
423 dev->io = IO_READ;
424 dev->stream = STREAM_ON;
425 em2820_queue_unusedframes(dev);
426 }
427
428 if (!count) {
429 up(&dev->fileop_lock);
430 return 0;
431 }
432
433 if (list_empty(&dev->outqueue)) {
434 if (filp->f_flags & O_NONBLOCK) {
435 up(&dev->fileop_lock);
436 return -EAGAIN;
437 }
438 ret = wait_event_interruptible
439 (dev->wait_frame,
440 (!list_empty(&dev->outqueue)) ||
441 (dev->state & DEV_DISCONNECTED));
442 if (ret) {
443 up(&dev->fileop_lock);
444 return ret;
445 }
446 if (dev->state & DEV_DISCONNECTED) {
447 up(&dev->fileop_lock);
448 return -ENODEV;
449 }
450 }
451
452 f = list_entry(dev->outqueue.prev, struct em2820_frame_t, frame);
453
454 spin_lock_irqsave(&dev->queue_lock, lock_flags);
455 list_for_each_entry(i, &dev->outqueue, frame)
456 i->state = F_UNUSED;
457 INIT_LIST_HEAD(&dev->outqueue);
458 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
459
460 em2820_queue_unusedframes(dev);
461
462 if (count > f->buf.length)
463 count = f->buf.length;
464
465 if (copy_to_user(buf, f->bufmem, count)) {
466 up(&dev->fileop_lock);
467 return -EFAULT;
468 }
469 *f_pos += count;
470
471 up(&dev->fileop_lock);
472
473 return count;
474 }
475
476 /*
477 * em2820_v4l2_poll()
478 * will allocate buffers when called for the first time
479 */
480 static unsigned int em2820_v4l2_poll(struct file *filp, poll_table * wait)
481 {
482 struct em2820 *dev = video_get_drvdata(video_devdata(filp));
483 unsigned int mask = 0;
484
485 if (down_interruptible(&dev->fileop_lock))
486 return POLLERR;
487
488 if (dev->state & DEV_DISCONNECTED) {
489 em2820_videodbg("device not present");
490 } else if (dev->state & DEV_MISCONFIGURED) {
491 em2820_videodbg("device is misconfigured; close and open it again");
492 } else {
493 if (dev->io == IO_NONE) {
494 if (!em2820_request_buffers
495 (dev, EM2820_NUM_READ_FRAMES)) {
496 em2820_warn
497 ("poll() failed, not enough memory\n");
498 } else {
499 dev->io = IO_READ;
500 dev->stream = STREAM_ON;
501 }
502 }
503
504 if (dev->io == IO_READ) {
505 em2820_queue_unusedframes(dev);
506 poll_wait(filp, &dev->wait_frame, wait);
507
508 if (!list_empty(&dev->outqueue))
509 mask |= POLLIN | POLLRDNORM;
510
511 up(&dev->fileop_lock);
512
513 return mask;
514 }
515 }
516
517 up(&dev->fileop_lock);
518 return POLLERR;
519 }
520
521 /*
522 * em2820_vm_open()
523 */
524 static void em2820_vm_open(struct vm_area_struct *vma)
525 {
526 struct em2820_frame_t *f = vma->vm_private_data;
527 f->vma_use_count++;
528 }
529
530 /*
531 * em2820_vm_close()
532 */
533 static void em2820_vm_close(struct vm_area_struct *vma)
534 {
535 /* NOTE: buffers are not freed here */
536 struct em2820_frame_t *f = vma->vm_private_data;
537 f->vma_use_count--;
538 }
539
540 static struct vm_operations_struct em2820_vm_ops = {
541 .open = em2820_vm_open,
542 .close = em2820_vm_close,
543 };
544
545 /*
546 * em2820_v4l2_mmap()
547 */
548 static int em2820_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
549 {
550 struct em2820 *dev = video_get_drvdata(video_devdata(filp));
551 unsigned long size = vma->vm_end - vma->vm_start,
552 start = vma->vm_start, pos, page;
553 u32 i;
554 if (down_interruptible(&dev->fileop_lock))
555 return -ERESTARTSYS;
556
557 if (dev->state & DEV_DISCONNECTED) {
558 em2820_videodbg("mmap: device not present");
559 up(&dev->fileop_lock);
560 return -ENODEV;
561 }
562
563 if (dev->state & DEV_MISCONFIGURED) {
564 em2820_videodbg ("mmap: Device is misconfigured; close and "
565 "open it again");
566 up(&dev->fileop_lock);
567 return -EIO;
568 }
569
570 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
571 size != PAGE_ALIGN(dev->frame[0].buf.length)) {
572 up(&dev->fileop_lock);
573 return -EINVAL;
574 }
575
576 for (i = 0; i < dev->num_frames; i++) {
577 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
578 break;
579 }
580 if (i == dev->num_frames) {
581 em2820_videodbg("mmap: user supplied mapping address is out of range");
582 up(&dev->fileop_lock);
583 return -EINVAL;
584 }
585
586 /* VM_IO is eventually going to replace PageReserved altogether */
587 vma->vm_flags |= VM_IO;
588 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
589
590 pos = (unsigned long)dev->frame[i].bufmem;
591 while (size > 0) { /* size is page-aligned */
592 page = vmalloc_to_pfn((void *)pos);
593 if (remap_pfn_range(vma, start, page, PAGE_SIZE,
594 vma->vm_page_prot)) {
595 em2820_videodbg("mmap: rename page map failed");
596 up(&dev->fileop_lock);
597 return -EAGAIN;
598 }
599 start += PAGE_SIZE;
600 pos += PAGE_SIZE;
601 size -= PAGE_SIZE;
602 }
603
604 vma->vm_ops = &em2820_vm_ops;
605 vma->vm_private_data = &dev->frame[i];
606
607 em2820_vm_open(vma);
608 up(&dev->fileop_lock);
609 return 0;
610 }
611
612 /*
613 * em2820_get_ctrl()
614 * return the current saturation, brightness or contrast, mute state
615 */
616 static int em2820_get_ctrl(struct em2820 *dev, struct v4l2_control *ctrl)
617 {
618 s32 tmp;
619 switch (ctrl->id) {
620 case V4L2_CID_AUDIO_MUTE:
621 ctrl->value = dev->mute;
622 return 0;
623 case V4L2_CID_AUDIO_VOLUME:
624 ctrl->value = dev->volume;
625 return 0;
626 case V4L2_CID_BRIGHTNESS:
627 if ((tmp = em2820_brightness_get(dev)) < 0)
628 return -EIO;
629 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
630 return 0;
631 case V4L2_CID_CONTRAST:
632 if ((ctrl->value = em2820_contrast_get(dev)) < 0)
633 return -EIO;
634 return 0;
635 case V4L2_CID_SATURATION:
636 if ((ctrl->value = em2820_saturation_get(dev)) < 0)
637 return -EIO;
638 return 0;
639 case V4L2_CID_RED_BALANCE:
640 if ((tmp = em2820_v_balance_get(dev)) < 0)
641 return -EIO;
642 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
643 return 0;
644 case V4L2_CID_BLUE_BALANCE:
645 if ((tmp = em2820_u_balance_get(dev)) < 0)
646 return -EIO;
647 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
648 return 0;
649 case V4L2_CID_GAMMA:
650 if ((ctrl->value = em2820_gamma_get(dev)) < 0)
651 return -EIO;
652 return 0;
653 default:
654 return -EINVAL;
655 }
656 }
657
658 /*
659 * em2820_set_ctrl()
660 * mute or set new saturation, brightness or contrast
661 */
662 static int em2820_set_ctrl(struct em2820 *dev, const struct v4l2_control *ctrl)
663 {
664 switch (ctrl->id) {
665 case V4L2_CID_AUDIO_MUTE:
666 if (ctrl->value != dev->mute) {
667 dev->mute = ctrl->value;
668 em2820_audio_usb_mute(dev, ctrl->value);
669 return em2820_audio_analog_set(dev);
670 }
671 return 0;
672 case V4L2_CID_AUDIO_VOLUME:
673 dev->volume = ctrl->value;
674 return em2820_audio_analog_set(dev);
675 case V4L2_CID_BRIGHTNESS:
676 return em2820_brightness_set(dev, ctrl->value);
677 case V4L2_CID_CONTRAST:
678 return em2820_contrast_set(dev, ctrl->value);
679 case V4L2_CID_SATURATION:
680 return em2820_saturation_set(dev, ctrl->value);
681 case V4L2_CID_RED_BALANCE:
682 return em2820_v_balance_set(dev, ctrl->value);
683 case V4L2_CID_BLUE_BALANCE:
684 return em2820_u_balance_set(dev, ctrl->value);
685 case V4L2_CID_GAMMA:
686 return em2820_gamma_set(dev, ctrl->value);
687 default:
688 return -EINVAL;
689 }
690 }
691
692 /*
693 * em2820_stream_interrupt()
694 * stops streaming
695 */
696 static int em2820_stream_interrupt(struct em2820 *dev)
697 {
698 int ret = 0;
699
700 /* stop reading from the device */
701
702 dev->stream = STREAM_INTERRUPT;
703 ret = wait_event_timeout(dev->wait_stream,
704 (dev->stream == STREAM_OFF) ||
705 (dev->state & DEV_DISCONNECTED),
706 EM2820_URB_TIMEOUT);
707 if (dev->state & DEV_DISCONNECTED)
708 return -ENODEV;
709 else if (ret) {
710 dev->state |= DEV_MISCONFIGURED;
711 em2820_videodbg("device is misconfigured; close and "
712 "open /dev/video%d again", dev->vdev->minor);
713 return ret;
714 }
715
716 return 0;
717 }
718
719 static int em2820_set_norm(struct em2820 *dev, int width, int height)
720 {
721 unsigned int hscale, vscale;
722 unsigned int maxh, maxw;
723
724 maxw = norm_maxw(dev);
725 maxh = norm_maxh(dev);
726
727 /* width must even because of the YUYV format */
728 /* height must be even because of interlacing */
729 height &= 0xfffe;
730 width &= 0xfffe;
731
732 if (height < 32)
733 height = 32;
734 if (height > maxh)
735 height = maxh;
736 if (width < 48)
737 width = 48;
738 if (width > maxw)
739 width = maxw;
740
741 if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
742 hscale = 0x3fff;
743 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
744
745 if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
746 vscale = 0x3fff;
747 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
748
749 /* set new image size */
750 dev->width = width;
751 dev->height = height;
752 dev->frame_size = dev->width * dev->height * 2;
753 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
754 dev->bytesperline = dev->width * 2;
755 dev->hscale = hscale;
756 dev->vscale = vscale;
757
758 em2820_resolution_set(dev);
759
760 return 0;
761 }
762
763 static void video_mux(struct em2820 *dev, int index)
764 {
765 int input, ainput;
766
767 input = INPUT(index)->vmux;
768 dev->ctl_input = index;
769
770 em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
771
772 dev->ctl_ainput = INPUT(index)->amux;
773
774 switch (dev->ctl_ainput) {
775 case 0:
776 ainput = EM2820_AUDIO_SRC_TUNER;
777 break;
778 default:
779 ainput = EM2820_AUDIO_SRC_LINE;
780 }
781
782 em2820_audio_source(dev, ainput);
783 }
784
785 /*
786 * em2820_v4l2_do_ioctl()
787 * This function is _not_ called directly, but from
788 * em2820_v4l2_ioctl. Userspace
789 * copying is done already, arg is a kernel pointer.
790 */
791 static int em2820_do_ioctl(struct inode *inode, struct file *filp,
792 struct em2820 *dev, unsigned int cmd, void *arg,
793 v4l2_kioctl driver_ioctl)
794 {
795 int ret;
796
797 switch (cmd) {
798 /* ---------- tv norms ---------- */
799 case VIDIOC_ENUMSTD:
800 {
801 struct v4l2_standard *e = arg;
802 unsigned int i;
803
804 i = e->index;
805 if (i >= TVNORMS)
806 return -EINVAL;
807 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
808 tvnorms[e->index].name);
809 e->index = i;
810 if (ret < 0)
811 return ret;
812 return 0;
813 }
814 case VIDIOC_G_STD:
815 {
816 v4l2_std_id *id = arg;
817
818 *id = dev->tvnorm->id;
819 return 0;
820 }
821 case VIDIOC_S_STD:
822 {
823 v4l2_std_id *id = arg;
824 unsigned int i;
825
826 for (i = 0; i < TVNORMS; i++)
827 if (*id == tvnorms[i].id)
828 break;
829 if (i == TVNORMS)
830 for (i = 0; i < TVNORMS; i++)
831 if (*id & tvnorms[i].id)
832 break;
833 if (i == TVNORMS)
834 return -EINVAL;
835
836 down(&dev->lock);
837 dev->tvnorm = &tvnorms[i];
838
839 em2820_set_norm(dev, dev->width, dev->height);
840
841 /*
842 dev->width=norm_maxw(dev);
843 dev->height=norm_maxh(dev);
844 dev->frame_size=dev->width*dev->height*2;
845 dev->field_size=dev->frame_size>>1;
846 dev->bytesperline=dev->width*2;
847 dev->hscale=0;
848 dev->vscale=0;
849
850 em2820_resolution_set(dev);
851 */
852 /*
853 em2820_uninit_isoc(dev);
854 em2820_set_alternate(dev);
855 em2820_capture_start(dev, 1);
856 em2820_resolution_set(dev);
857 em2820_init_isoc(dev);
858 */
859 em2820_i2c_call_clients(dev, DECODER_SET_NORM,
860 &tvnorms[i].mode);
861 em2820_i2c_call_clients(dev, VIDIOC_S_STD,
862 &dev->tvnorm->id);
863
864 up(&dev->lock);
865
866 return 0;
867 }
868
869 /* ------ input switching ---------- */
870 case VIDIOC_ENUMINPUT:
871 {
872 struct v4l2_input *i = arg;
873 unsigned int n;
874 static const char *iname[] = {
875 [EM2820_VMUX_COMPOSITE1] = "Composite1",
876 [EM2820_VMUX_COMPOSITE2] = "Composite2",
877 [EM2820_VMUX_COMPOSITE3] = "Composite3",
878 [EM2820_VMUX_COMPOSITE4] = "Composite4",
879 [EM2820_VMUX_SVIDEO] = "S-Video",
880 [EM2820_VMUX_TELEVISION] = "Television",
881 [EM2820_VMUX_CABLE] = "Cable TV",
882 [EM2820_VMUX_DVB] = "DVB",
883 [EM2820_VMUX_DEBUG] = "for debug only",
884 };
885
886 n = i->index;
887 if (n >= MAX_EM2820_INPUT)
888 return -EINVAL;
889 if (0 == INPUT(n)->type)
890 return -EINVAL;
891 memset(i, 0, sizeof(*i));
892 i->index = n;
893 i->type = V4L2_INPUT_TYPE_CAMERA;
894 strcpy(i->name, iname[INPUT(n)->type]);
895 if ((EM2820_VMUX_TELEVISION == INPUT(n)->type) ||
896 (EM2820_VMUX_CABLE == INPUT(n)->type))
897 i->type = V4L2_INPUT_TYPE_TUNER;
898 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
899 i->std |= tvnorms[n].id;
900 return 0;
901 }
902
903 case VIDIOC_G_INPUT:
904 {
905 int *i = arg;
906 *i = dev->ctl_input;
907
908 return 0;
909 }
910
911 case VIDIOC_S_INPUT:
912 {
913 int *index = arg;
914
915 if (*index >= MAX_EM2820_INPUT)
916 return -EINVAL;
917 if (0 == INPUT(*index)->type)
918 return -EINVAL;
919
920 down(&dev->lock);
921 video_mux(dev, *index);
922 up(&dev->lock);
923
924 return 0;
925 }
926
927 case VIDIOC_G_AUDIO:
928 {
929 struct v4l2_audio *a = arg;
930 unsigned int index = a->index;
931
932 if (a->index > 1)
933 return -EINVAL;
934 memset(a, 0, sizeof(*a));
935 index = dev->ctl_ainput;
936
937 if (index == 0) {
938 strcpy(a->name, "Television");
939 } else {
940 strcpy(a->name, "Line In");
941 }
942 a->capability = V4L2_AUDCAP_STEREO;
943 a->index = index;
944 return 0;
945 }
946
947 case VIDIOC_S_AUDIO:
948 {
949 struct v4l2_audio *a = arg;
950 if (a->index != dev->ctl_ainput)
951 return -EINVAL;
952
953 return 0;
954 }
955
956 /* --- controls ---------------------------------------------- */
957 case VIDIOC_QUERYCTRL:
958 {
959 struct v4l2_queryctrl *qc = arg;
960 u8 i, n;
961 n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
962 for (i = 0; i < n; i++)
963 if (qc->id && qc->id == em2820_qctrl[i].id) {
964 memcpy(qc, &(em2820_qctrl[i]),
965 sizeof(*qc));
966 return 0;
967 }
968
969 return -EINVAL;
970 }
971
972 case VIDIOC_G_CTRL:
973 {
974 struct v4l2_control *ctrl = arg;
975
976
977 return em2820_get_ctrl(dev, ctrl);
978 }
979
980 case VIDIOC_S_CTRL_OLD: /* ??? */
981 case VIDIOC_S_CTRL:
982 {
983 struct v4l2_control *ctrl = arg;
984 u8 i, n;
985
986
987 n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
988 for (i = 0; i < n; i++)
989 if (ctrl->id == em2820_qctrl[i].id) {
990 if (ctrl->value <
991 em2820_qctrl[i].minimum
992 || ctrl->value >
993 em2820_qctrl[i].maximum)
994 return -ERANGE;
995
996 return em2820_set_ctrl(dev, ctrl);
997 }
998 return -EINVAL;
999 }
1000
1001 /* --- tuner ioctls ------------------------------------------ */
1002 case VIDIOC_G_TUNER:
1003 {
1004 struct v4l2_tuner *t = arg;
1005 int status = 0;
1006
1007 if (0 != t->index)
1008 return -EINVAL;
1009
1010 memset(t, 0, sizeof(*t));
1011 strcpy(t->name, "Tuner");
1012 t->type = V4L2_TUNER_ANALOG_TV;
1013 t->capability = V4L2_TUNER_CAP_NORM;
1014 t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
1015 /* t->signal = 0xffff;*/
1016 /* em2820_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1017 /* No way to get signal strength? */
1018 down(&dev->lock);
1019 em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1020 &status);
1021 up(&dev->lock);
1022 t->signal =
1023 (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1024
1025 em2820_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x", t->signal,
1026 t->afc);
1027 return 0;
1028 }
1029 case VIDIOC_S_TUNER:
1030 {
1031 struct v4l2_tuner *t = arg;
1032 int status = 0;
1033
1034 if (0 != t->index)
1035 return -EINVAL;
1036 memset(t, 0, sizeof(*t));
1037 strcpy(t->name, "Tuner");
1038 t->type = V4L2_TUNER_ANALOG_TV;
1039 t->capability = V4L2_TUNER_CAP_NORM;
1040 t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
1041 /* t->signal = 0xffff; */
1042 /* No way to get signal strength? */
1043 down(&dev->lock);
1044 em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1045 &status);
1046 up(&dev->lock);
1047 t->signal =
1048 (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1049
1050 em2820_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1051 t->signal, t->afc);
1052 return 0;
1053 }
1054 case VIDIOC_G_FREQUENCY:
1055 {
1056 struct v4l2_frequency *f = arg;
1057
1058 memset(f, 0, sizeof(*f));
1059 f->type = V4L2_TUNER_ANALOG_TV;
1060 f->frequency = dev->ctl_freq;
1061
1062 return 0;
1063 }
1064 case VIDIOC_S_FREQUENCY:
1065 {
1066 struct v4l2_frequency *f = arg;
1067
1068 if (0 != f->tuner)
1069 return -EINVAL;
1070
1071 if (V4L2_TUNER_ANALOG_TV != f->type)
1072 return -EINVAL;
1073
1074 down(&dev->lock);
1075 dev->ctl_freq = f->frequency;
1076 em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1077 up(&dev->lock);
1078 return 0;
1079 }
1080
1081 case VIDIOC_CROPCAP:
1082 {
1083 struct v4l2_cropcap *cc = arg;
1084
1085 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1086 return EINVAL;
1087 cc->bounds.left = 0;
1088 cc->bounds.top = 0;
1089 cc->bounds.width = dev->width;
1090 cc->bounds.height = dev->height;
1091 cc->defrect = cc->bounds;
1092 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1093 cc->pixelaspect.denominator = 59;
1094 return 0;
1095 }
1096 case VIDIOC_STREAMON:
1097 {
1098 int *type = arg;
1099
1100 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1101 || dev->io != IO_MMAP)
1102 return -EINVAL;
1103
1104 if (list_empty(&dev->inqueue))
1105 return -EINVAL;
1106
1107 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
1108
1109 em2820_videodbg("VIDIOC_STREAMON: starting stream");
1110
1111 return 0;
1112 }
1113 case VIDIOC_STREAMOFF:
1114 {
1115 int *type = arg;
1116 int ret;
1117
1118 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1119 || dev->io != IO_MMAP)
1120 return -EINVAL;
1121
1122 if (dev->stream == STREAM_ON) {
1123 em2820_videodbg ("VIDIOC_STREAMOFF: interrupting stream");
1124 if ((ret = em2820_stream_interrupt(dev)))
1125 return ret;
1126 }
1127 em2820_empty_framequeues(dev);
1128
1129 return 0;
1130 }
1131 default:
1132 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1133 driver_ioctl);
1134 }
1135 return 0;
1136 }
1137
1138 /*
1139 * em2820_v4l2_do_ioctl()
1140 * This function is _not_ called directly, but from
1141 * em2820_v4l2_ioctl. Userspace
1142 * copying is done already, arg is a kernel pointer.
1143 */
1144 static int em2820_video_do_ioctl(struct inode *inode, struct file *filp,
1145 unsigned int cmd, void *arg)
1146 {
1147 struct em2820 *dev = filp->private_data;
1148
1149 if (!dev)
1150 return -ENODEV;
1151
1152 if (video_debug > 1)
1153 em2820_print_ioctl(dev->name,cmd);
1154
1155 switch (cmd) {
1156
1157 /* --- capabilities ------------------------------------------ */
1158 case VIDIOC_QUERYCAP:
1159 {
1160 struct v4l2_capability *cap = arg;
1161
1162 memset(cap, 0, sizeof(*cap));
1163 strlcpy(cap->driver, "em2820", sizeof(cap->driver));
1164 strlcpy(cap->card, em2820_boards[dev->model].name,
1165 sizeof(cap->card));
1166 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1167 sizeof(cap->bus_info));
1168 cap->version = EM2820_VERSION_CODE;
1169 cap->capabilities =
1170 V4L2_CAP_VIDEO_CAPTURE |
1171 V4L2_CAP_AUDIO |
1172 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1173 if (dev->has_tuner)
1174 cap->capabilities |= V4L2_CAP_TUNER;
1175 return 0;
1176 }
1177
1178 /* --- capture ioctls ---------------------------------------- */
1179 case VIDIOC_ENUM_FMT:
1180 {
1181 struct v4l2_fmtdesc *fmtd = arg;
1182
1183 if (fmtd->index != 0)
1184 return -EINVAL;
1185 memset(fmtd, 0, sizeof(*fmtd));
1186 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1187 strcpy(fmtd->description, "Packed YUY2");
1188 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1189 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1190 return 0;
1191 }
1192
1193 case VIDIOC_G_FMT:
1194 {
1195 struct v4l2_format *format = arg;
1196
1197 em2820_videodbg("VIDIOC_G_FMT: type=%s",
1198 format->type ==
1199 V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1200 "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1201 V4L2_BUF_TYPE_VBI_CAPTURE ?
1202 "V4L2_BUF_TYPE_VBI_CAPTURE " :
1203 "not supported");
1204
1205 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1206 return -EINVAL;
1207
1208 format->fmt.pix.width = dev->width;
1209 format->fmt.pix.height = dev->height;
1210 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1211 format->fmt.pix.bytesperline = dev->bytesperline;
1212 format->fmt.pix.sizeimage = dev->frame_size;
1213 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1214 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1215
1216 em2820_videodbg("VIDIOC_G_FMT: %dx%d", dev->width,
1217 dev->height);
1218 return 0;
1219 }
1220
1221 case VIDIOC_TRY_FMT:
1222 case VIDIOC_S_FMT:
1223 {
1224 struct v4l2_format *format = arg;
1225 u32 i;
1226 int ret = 0;
1227 int width = format->fmt.pix.width;
1228 int height = format->fmt.pix.height;
1229 unsigned int hscale, vscale;
1230 unsigned int maxh, maxw;
1231
1232 maxw = norm_maxw(dev);
1233 maxh = norm_maxh(dev);
1234
1235 /* int both_fields; */
1236
1237 em2820_videodbg("%s: type=%s",
1238 cmd ==
1239 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1240 "VIDIOC_S_FMT",
1241 format->type ==
1242 V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1243 "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1244 V4L2_BUF_TYPE_VBI_CAPTURE ?
1245 "V4L2_BUF_TYPE_VBI_CAPTURE " :
1246 "not supported");
1247
1248 if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1249 return -EINVAL;
1250
1251 em2820_videodbg("%s: requested %dx%d",
1252 cmd ==
1253 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1254 "VIDIOC_S_FMT", format->fmt.pix.width,
1255 format->fmt.pix.height);
1256
1257 /* FIXME: Move some code away from here */
1258 /* width must even because of the YUYV format */
1259 /* height must be even because of interlacing */
1260 height &= 0xfffe;
1261 width &= 0xfffe;
1262
1263 if (height < 32)
1264 height = 32;
1265 if (height > maxh)
1266 height = maxh;
1267 if (width < 48)
1268 width = 48;
1269 if (width > maxw)
1270 width = maxw;
1271
1272 if ((hscale =
1273 (((unsigned long)maxw) << 12) / width - 4096L) >=
1274 0x4000)
1275 hscale = 0x3fff;
1276 width =
1277 (((unsigned long)maxw) << 12) / (hscale + 4096L);
1278
1279 if ((vscale =
1280 (((unsigned long)maxh) << 12) / height - 4096L) >=
1281 0x4000)
1282 vscale = 0x3fff;
1283 height =
1284 (((unsigned long)maxh) << 12) / (vscale + 4096L);
1285
1286 format->fmt.pix.width = width;
1287 format->fmt.pix.height = height;
1288 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1289 format->fmt.pix.bytesperline = width * 2;
1290 format->fmt.pix.sizeimage = width * 2 * height;
1291 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1292 format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1293
1294 em2820_videodbg("%s: returned %dx%d (%d, %d)",
1295 cmd ==
1296 VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1297 "VIDIOC_S_FMT", format->fmt.pix.width,
1298 format->fmt.pix.height, hscale, vscale);
1299
1300 if (cmd == VIDIOC_TRY_FMT)
1301 return 0;
1302
1303 for (i = 0; i < dev->num_frames; i++)
1304 if (dev->frame[i].vma_use_count) {
1305 em2820_videodbg("VIDIOC_S_FMT failed. "
1306 "Unmap the buffers first.");
1307 return -EINVAL;
1308 }
1309
1310 /* stop io in case it is already in progress */
1311 if (dev->stream == STREAM_ON) {
1312 em2820_videodbg("VIDIOC_SET_FMT: interupting stream");
1313 if ((ret = em2820_stream_interrupt(dev)))
1314 return ret;
1315 }
1316
1317 em2820_release_buffers(dev);
1318 dev->io = IO_NONE;
1319
1320 /* set new image size */
1321 dev->width = width;
1322 dev->height = height;
1323 dev->frame_size = dev->width * dev->height * 2;
1324 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1325 dev->bytesperline = dev->width * 2;
1326 dev->hscale = hscale;
1327 dev->vscale = vscale;
1328 /* dev->both_fileds = both_fileds; */
1329 em2820_uninit_isoc(dev);
1330 em2820_set_alternate(dev);
1331 em2820_capture_start(dev, 1);
1332 em2820_resolution_set(dev);
1333 em2820_init_isoc(dev);
1334
1335 return 0;
1336 }
1337
1338 /* --- streaming capture ------------------------------------- */
1339 case VIDIOC_REQBUFS:
1340 {
1341 struct v4l2_requestbuffers *rb = arg;
1342 u32 i;
1343 int ret;
1344
1345 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1346 rb->memory != V4L2_MEMORY_MMAP)
1347 return -EINVAL;
1348
1349 if (dev->io == IO_READ) {
1350 em2820_videodbg ("method is set to read;"
1351 " close and open the device again to"
1352 " choose the mmap I/O method");
1353 return -EINVAL;
1354 }
1355
1356 for (i = 0; i < dev->num_frames; i++)
1357 if (dev->frame[i].vma_use_count) {
1358 em2820_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped");
1359 return -EINVAL;
1360 }
1361
1362 if (dev->stream == STREAM_ON) {
1363 em2820_videodbg("VIDIOC_REQBUFS: interrupting stream");
1364 if ((ret = em2820_stream_interrupt(dev)))
1365 return ret;
1366 }
1367
1368 em2820_empty_framequeues(dev);
1369
1370 em2820_release_buffers(dev);
1371 if (rb->count)
1372 rb->count =
1373 em2820_request_buffers(dev, rb->count);
1374
1375 dev->frame_current = NULL;
1376
1377 em2820_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i",
1378 rb->count);
1379 dev->io = rb->count ? IO_MMAP : IO_NONE;
1380 return 0;
1381 }
1382
1383 case VIDIOC_QUERYBUF:
1384 {
1385 struct v4l2_buffer *b = arg;
1386
1387 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1388 b->index >= dev->num_frames || dev->io != IO_MMAP)
1389 return -EINVAL;
1390
1391 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1392
1393 if (dev->frame[b->index].vma_use_count) {
1394 b->flags |= V4L2_BUF_FLAG_MAPPED;
1395 }
1396 if (dev->frame[b->index].state == F_DONE)
1397 b->flags |= V4L2_BUF_FLAG_DONE;
1398 else if (dev->frame[b->index].state != F_UNUSED)
1399 b->flags |= V4L2_BUF_FLAG_QUEUED;
1400 return 0;
1401 }
1402 case VIDIOC_QBUF:
1403 {
1404 struct v4l2_buffer *b = arg;
1405 unsigned long lock_flags;
1406
1407 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1408 b->index >= dev->num_frames || dev->io != IO_MMAP) {
1409 return -EINVAL;
1410 }
1411
1412 if (dev->frame[b->index].state != F_UNUSED) {
1413 return -EAGAIN;
1414 }
1415 dev->frame[b->index].state = F_QUEUED;
1416
1417 /* add frame to fifo */
1418 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1419 list_add_tail(&dev->frame[b->index].frame,
1420 &dev->inqueue);
1421 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1422
1423 return 0;
1424 }
1425 case VIDIOC_DQBUF:
1426 {
1427 struct v4l2_buffer *b = arg;
1428 struct em2820_frame_t *f;
1429 unsigned long lock_flags;
1430 int ret = 0;
1431
1432 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1433 || dev->io != IO_MMAP)
1434 return -EINVAL;
1435
1436 if (list_empty(&dev->outqueue)) {
1437 if (dev->stream == STREAM_OFF)
1438 return -EINVAL;
1439 if (filp->f_flags & O_NONBLOCK)
1440 return -EAGAIN;
1441 ret = wait_event_interruptible
1442 (dev->wait_frame,
1443 (!list_empty(&dev->outqueue)) ||
1444 (dev->state & DEV_DISCONNECTED));
1445 if (ret)
1446 return ret;
1447 if (dev->state & DEV_DISCONNECTED)
1448 return -ENODEV;
1449 }
1450
1451 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1452 f = list_entry(dev->outqueue.next,
1453 struct em2820_frame_t, frame);
1454 list_del(dev->outqueue.next);
1455 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1456
1457 f->state = F_UNUSED;
1458 memcpy(b, &f->buf, sizeof(*b));
1459
1460 if (f->vma_use_count)
1461 b->flags |= V4L2_BUF_FLAG_MAPPED;
1462
1463 return 0;
1464 }
1465 default:
1466 return em2820_do_ioctl(inode, filp, dev, cmd, arg,
1467 em2820_video_do_ioctl);
1468 }
1469 return 0;
1470 }
1471
1472 /*
1473 * em2820_v4l2_ioctl()
1474 * handle v4l2 ioctl the main action happens in em2820_v4l2_do_ioctl()
1475 */
1476 static int em2820_v4l2_ioctl(struct inode *inode, struct file *filp,
1477 unsigned int cmd, unsigned long arg)
1478 {
1479 struct em2820 *dev = video_get_drvdata(video_devdata(filp));
1480 int ret = 0;
1481
1482 if (down_interruptible(&dev->fileop_lock))
1483 return -ERESTARTSYS;
1484
1485 if (dev->state & DEV_DISCONNECTED) {
1486 em2820_errdev("v4l2 ioctl: device not present\n");
1487 up(&dev->fileop_lock);
1488 return -ENODEV;
1489 }
1490
1491 if (dev->state & DEV_MISCONFIGURED) {
1492 em2820_errdev
1493 ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1494 up(&dev->fileop_lock);
1495 return -EIO;
1496 }
1497
1498 ret = video_usercopy(inode, filp, cmd, arg, em2820_video_do_ioctl);
1499
1500 up(&dev->fileop_lock);
1501
1502 return ret;
1503 }
1504
1505 static struct file_operations em2820_v4l_fops = {
1506 .owner = THIS_MODULE,
1507 .open = em2820_v4l2_open,
1508 .release = em2820_v4l2_close,
1509 .ioctl = em2820_v4l2_ioctl,
1510 .read = em2820_v4l2_read,
1511 .poll = em2820_v4l2_poll,
1512 .mmap = em2820_v4l2_mmap,
1513 .llseek = no_llseek,
1514 };
1515
1516 /******************************** usb interface *****************************************/
1517
1518 /*
1519 * em2820_init_dev()
1520 * allocates and inits the device structs, registers i2c bus and v4l device
1521 */
1522 static int em2820_init_dev(struct em2820 **devhandle, struct usb_device *udev,
1523 int minor, int model)
1524 {
1525 struct em2820 *dev;
1526 int retval = -ENOMEM;
1527 int errCode, i;
1528 unsigned int maxh, maxw;
1529 struct usb_interface *uif;
1530
1531 /* allocate memory for our device state and initialize it */
1532 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
1533 if (dev == NULL) {
1534 em2820_err(DRIVER_NAME ": out of memory!\n");
1535 return -ENOMEM;
1536 }
1537 memset(dev, 0x00, sizeof(*dev));
1538
1539 snprintf(dev->name, 29, "em2820 #%d", minor);
1540 dev->udev = udev;
1541 dev->model = model;
1542 init_MUTEX(&dev->lock);
1543 init_waitqueue_head(&dev->open);
1544
1545 dev->em2820_write_regs = em2820_write_regs;
1546 dev->em2820_read_reg = em2820_read_reg;
1547 dev->em2820_read_reg_req_len = em2820_read_reg_req_len;
1548 dev->em2820_write_regs_req = em2820_write_regs_req;
1549 dev->em2820_read_reg_req = em2820_read_reg_req;
1550 dev->has_tuner = em2820_boards[model].has_tuner;
1551 dev->has_msp34xx = em2820_boards[model].has_msp34xx;
1552 dev->tda9887_conf = em2820_boards[model].tda9887_conf;
1553 dev->decoder = em2820_boards[model].decoder;
1554
1555 if (tuner >= 0)
1556 dev->tuner_type = tuner;
1557 else
1558 dev->tuner_type = em2820_boards[model].tuner_type;
1559
1560 dev->video_inputs = em2820_boards[model].vchannels;
1561
1562 for (i = 0; i < TVNORMS; i++)
1563 if (em2820_boards[model].norm == tvnorms[i].mode)
1564 break;
1565 if (i == TVNORMS)
1566 i = 0;
1567
1568 dev->tvnorm = &tvnorms[i]; /* set default norm */
1569
1570 em2820_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1571
1572 maxw = norm_maxw(dev);
1573 maxh = norm_maxh(dev);
1574
1575 /* set default image size */
1576 dev->width = maxw;
1577 dev->height = maxh;
1578 dev->interlaced = EM2820_INTERLACED_DEFAULT;
1579 dev->field_size = dev->width * dev->height;
1580 dev->frame_size =
1581 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1582 dev->bytesperline = dev->width * 2;
1583 dev->hscale = 0;
1584 dev->vscale = 0;
1585 dev->ctl_input = 2;
1586
1587 /* setup video picture settings for saa7113h */
1588 memset(&dev->vpic, 0, sizeof(dev->vpic));
1589 dev->vpic.colour = 128 << 8;
1590 dev->vpic.hue = 128 << 8;
1591 dev->vpic.brightness = 128 << 8;
1592 dev->vpic.contrast = 192 << 8;
1593 dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1594 dev->vpic.depth = 16;
1595 dev->vpic.palette = VIDEO_PALETTE_YUV422;
1596
1597 /* compute alternate max packet sizes */
1598 uif = dev->udev->actconfig->interface[0];
1599 dev->alt_max_pkt_size[0] = 0;
1600 for (i = 1; i <= EM2820_MAX_ALT; i++) {
1601 u16 tmp =
1602 le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1603 wMaxPacketSize);
1604 dev->alt_max_pkt_size[i] =
1605 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1606 }
1607
1608 #ifdef CONFIG_MODULES
1609 /* request some modules */
1610 if (dev->decoder == EM2820_SAA7113)
1611 request_module("saa7113");
1612 if (dev->decoder == EM2820_SAA7114)
1613 request_module("saa7114");
1614 if (dev->decoder == EM2820_TVP5150)
1615 request_module("tvp5150");
1616 if (dev->has_tuner)
1617 request_module("tuner");
1618 if (dev->tda9887_conf)
1619 request_module("tda9887");
1620 #endif
1621 errCode = em2820_config(dev);
1622 if (errCode) {
1623 em2820_errdev("error configuring device\n");
1624 kfree(dev);
1625 return -ENOMEM;
1626 }
1627
1628 down(&dev->lock);
1629 /* register i2c bus */
1630 em2820_i2c_register(dev);
1631
1632 /* Do board specific init and eeprom reading */
1633 em2820_card_setup(dev);
1634
1635 /* configure the device */
1636 em2820_config_i2c(dev);
1637
1638 up(&dev->lock);
1639
1640 errCode = em2820_config(dev);
1641
1642 #ifdef CONFIG_MODULES
1643 if (dev->has_msp34xx)
1644 request_module("msp3400");
1645 #endif
1646 /* allocate and fill v4l2 device struct */
1647 dev->vdev = video_device_alloc();
1648 if (NULL == dev->vdev) {
1649 em2820_errdev("cannot allocate video_device.\n");
1650 kfree(dev);
1651 return -ENOMEM;
1652 }
1653
1654 dev->vdev->owner = THIS_MODULE;
1655 dev->vdev->type = VID_TYPE_CAPTURE;
1656 if (dev->has_tuner)
1657 dev->vdev->type |= VID_TYPE_TUNER;
1658 dev->vdev->hardware = 0;
1659 dev->vdev->fops = &em2820_v4l_fops;
1660 dev->vdev->minor = -1;
1661 dev->vdev->dev = &dev->udev->dev;
1662 dev->vdev->release = video_device_release;
1663 snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1664 "em2820 video");
1665 video_set_drvdata(dev->vdev, dev);
1666
1667 /* register v4l2 device */
1668 down(&dev->lock);
1669 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1670 em2820_errdev("unable to register video device (error=%i).\n",
1671 retval);
1672 up(&dev->lock);
1673 video_set_drvdata(dev->vdev, NULL);
1674 video_device_release(dev->vdev);
1675 kfree(dev);
1676 return -ENODEV;
1677 }
1678 if (dev->has_msp34xx) {
1679 /* Send a reset to other chips via gpio */
1680 em2820_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1681 udelay(2500);
1682 em2820_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1683 udelay(2500);
1684
1685 }
1686 video_mux(dev, 0);
1687
1688 up(&dev->lock);
1689
1690 em2820_info("V4L2 device registered as /dev/video%d\n",
1691 dev->vdev->minor);
1692
1693 *devhandle = dev;
1694 return 0;
1695 }
1696
1697 /*
1698 * em2820_usb_probe()
1699 * checks for supported devices
1700 */
1701 static int em2820_usb_probe(struct usb_interface *interface,
1702 const struct usb_device_id *id)
1703 {
1704 const struct usb_endpoint_descriptor *endpoint;
1705 struct usb_device *udev;
1706 struct em2820 *dev = NULL;
1707 int retval = -ENODEV;
1708
1709 udev = usb_get_dev(interface_to_usbdev(interface));
1710 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1711
1712 /* check if the the device has the iso in endpoint at the correct place */
1713 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1714 USB_ENDPOINT_XFER_ISOC) {
1715 /* em2820_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); */
1716 return -ENODEV;
1717 }
1718 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1719 /* em2820_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); */
1720 return -ENODEV;
1721 }
1722
1723 /* allocate device struct */
1724 retval = em2820_init_dev(&dev, udev, interface->minor, id->driver_info);
1725 if (retval)
1726 return retval;
1727
1728 em2820_info("Found %s\n", em2820_boards[id->driver_info].name);
1729
1730 /* save our data pointer in this interface device */
1731 usb_set_intfdata(interface, dev);
1732 return 0;
1733 }
1734
1735 /*
1736 * em2820_usb_disconnect()
1737 * called when the device gets diconencted
1738 * video device will be unregistered on v4l2_close in case it is still open
1739 */
1740 static void em2820_usb_disconnect(struct usb_interface *interface)
1741 {
1742 struct em2820 *dev = usb_get_intfdata(interface);
1743 usb_set_intfdata(interface, NULL);
1744
1745 if (!dev)
1746 return;
1747
1748 down_write(&em2820_disconnect);
1749
1750 down(&dev->lock);
1751
1752 em2820_info("disconnecting %s\n", dev->vdev->name);
1753
1754 wake_up_interruptible_all(&dev->open);
1755
1756 if (dev->users) {
1757 em2820_warn
1758 ("device /dev/video%d is open! Deregistration and memory "
1759 "deallocation are deferred on close.\n", dev->vdev->minor);
1760 dev->state |= DEV_MISCONFIGURED;
1761 em2820_uninit_isoc(dev);
1762 dev->state |= DEV_DISCONNECTED;
1763 wake_up_interruptible(&dev->wait_frame);
1764 wake_up_interruptible(&dev->wait_stream);
1765 } else {
1766 dev->state |= DEV_DISCONNECTED;
1767 em2820_release_resources(dev);
1768 }
1769
1770 up(&dev->lock);
1771
1772 if (!dev->users)
1773 kfree(dev);
1774
1775 up_write(&em2820_disconnect);
1776
1777 }
1778
1779 static struct usb_driver em2820_usb_driver = {
1780 .owner = THIS_MODULE,
1781 .name = "em2820",
1782 .probe = em2820_usb_probe,
1783 .disconnect = em2820_usb_disconnect,
1784 .id_table = em2820_id_table,
1785 };
1786
1787 static int __init em2820_module_init(void)
1788 {
1789 int result;
1790
1791 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1792 (EM2820_VERSION_CODE >> 16) & 0xff,
1793 (EM2820_VERSION_CODE >> 8) & 0xff, EM2820_VERSION_CODE & 0xff);
1794 #ifdef SNAPSHOT
1795 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1796 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1797 #endif
1798
1799 /* register this driver with the USB subsystem */
1800 result = usb_register(&em2820_usb_driver);
1801 if (result)
1802 em2820_err(DRIVER_NAME
1803 " usb_register failed. Error number %d.\n", result);
1804
1805 return result;
1806 }
1807
1808 static void __exit em2820_module_exit(void)
1809 {
1810 /* deregister this driver with the USB subsystem */
1811 usb_deregister(&em2820_usb_driver);
1812 }
1813
1814 module_init(em2820_module_init);
1815 module_exit(em2820_module_exit);
Ubuntu Jammy Linux kernel mirror