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V4L/DVB (8482): videodev: move all ioctl callbacks to a new v4l2_ioctl_ops struct
[firewire-audio.git] / drivers / media / video / vivi.c
blob639210e5264707dfb3d0db62397ebb8e52bb5ccc
1 /*
2 * Virtual Video driver - This code emulates a real video device with v4l2 api
3 *
4 * Copyright (c) 2006 by:
5 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
6 * Ted Walther <ted--a.t--enumera.com>
7 * John Sokol <sokol--a.t--videotechnology.com>
8 * http://v4l.videotechnology.com/
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the BSD Licence, GNU General Public License
12 * as published by the Free Software Foundation; either version 2 of the
13 * License, or (at your option) any later version
14 */
15 #include <linux/module.h>
16 #include <linux/delay.h>
17 #include <linux/errno.h>
18 #include <linux/fs.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/mm.h>
22 #include <linux/ioport.h>
23 #include <linux/init.h>
24 #include <linux/sched.h>
25 #include <linux/pci.h>
26 #include <linux/random.h>
27 #include <linux/version.h>
28 #include <linux/mutex.h>
29 #include <linux/videodev2.h>
30 #include <linux/dma-mapping.h>
31 #ifdef CONFIG_VIDEO_V4L1_COMPAT
32 /* Include V4L1 specific functions. Should be removed soon */
33 #include <linux/videodev.h>
34 #endif
35 #include <linux/interrupt.h>
36 #include <media/videobuf-vmalloc.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-ioctl.h>
39 #include <linux/kthread.h>
40 #include <linux/highmem.h>
41 #include <linux/freezer.h>
42
43 #define VIVI_MODULE_NAME "vivi"
44
45 /* Wake up at about 30 fps */
46 #define WAKE_NUMERATOR 30
47 #define WAKE_DENOMINATOR 1001
48 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
49
50 #include "font.h"
51
52 #define VIVI_MAJOR_VERSION 0
53 #define VIVI_MINOR_VERSION 5
54 #define VIVI_RELEASE 0
55 #define VIVI_VERSION \
56 KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57
58 /* Declare static vars that will be used as parameters */
59 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
60 static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
61 static int n_devs = 1; /* Number of virtual devices */
62
63 /* supported controls */
64 static struct v4l2_queryctrl vivi_qctrl[] = {
65 {
66 .id = V4L2_CID_AUDIO_VOLUME,
67 .name = "Volume",
68 .minimum = 0,
69 .maximum = 65535,
70 .step = 65535/100,
71 .default_value = 65535,
72 .flags = 0,
73 .type = V4L2_CTRL_TYPE_INTEGER,
74 }, {
75 .id = V4L2_CID_BRIGHTNESS,
76 .type = V4L2_CTRL_TYPE_INTEGER,
77 .name = "Brightness",
78 .minimum = 0,
79 .maximum = 255,
80 .step = 1,
81 .default_value = 127,
82 .flags = 0,
83 }, {
84 .id = V4L2_CID_CONTRAST,
85 .type = V4L2_CTRL_TYPE_INTEGER,
86 .name = "Contrast",
87 .minimum = 0,
88 .maximum = 255,
89 .step = 0x1,
90 .default_value = 0x10,
91 .flags = 0,
92 }, {
93 .id = V4L2_CID_SATURATION,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "Saturation",
96 .minimum = 0,
97 .maximum = 255,
98 .step = 0x1,
99 .default_value = 127,
100 .flags = 0,
101 }, {
102 .id = V4L2_CID_HUE,
103 .type = V4L2_CTRL_TYPE_INTEGER,
104 .name = "Hue",
105 .minimum = -128,
106 .maximum = 127,
107 .step = 0x1,
108 .default_value = 0,
109 .flags = 0,
110 }
111 };
112
113 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
114
115 #define dprintk(dev, level, fmt, arg...) \
116 do { \
117 if (dev->vfd->debug >= (level)) \
118 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
119 } while (0)
120
121 /* ------------------------------------------------------------------
122 Basic structures
123 ------------------------------------------------------------------*/
124
125 struct vivi_fmt {
126 char *name;
127 u32 fourcc; /* v4l2 format id */
128 int depth;
129 };
130
131 static struct vivi_fmt format = {
132 .name = "4:2:2, packed, YUYV",
133 .fourcc = V4L2_PIX_FMT_YUYV,
134 .depth = 16,
135 };
136
137 struct sg_to_addr {
138 int pos;
139 struct scatterlist *sg;
140 };
141
142 /* buffer for one video frame */
143 struct vivi_buffer {
144 /* common v4l buffer stuff -- must be first */
145 struct videobuf_buffer vb;
146
147 struct vivi_fmt *fmt;
148 };
149
150 struct vivi_dmaqueue {
151 struct list_head active;
152
153 /* thread for generating video stream*/
154 struct task_struct *kthread;
155 wait_queue_head_t wq;
156 /* Counters to control fps rate */
157 int frame;
158 int ini_jiffies;
159 };
160
161 static LIST_HEAD(vivi_devlist);
162
163 struct vivi_dev {
164 struct list_head vivi_devlist;
165
166 spinlock_t slock;
167 struct mutex mutex;
168
169 int users;
170
171 /* various device info */
172 struct video_device *vfd;
173
174 struct vivi_dmaqueue vidq;
175
176 /* Several counters */
177 int h, m, s, ms;
178 unsigned long jiffies;
179 char timestr[13];
180
181 int mv_count; /* Controls bars movement */
182 };
183
184 struct vivi_fh {
185 struct vivi_dev *dev;
186
187 /* video capture */
188 struct vivi_fmt *fmt;
189 unsigned int width, height;
190 struct videobuf_queue vb_vidq;
191
192 enum v4l2_buf_type type;
193 };
194
195 /* ------------------------------------------------------------------
196 DMA and thread functions
197 ------------------------------------------------------------------*/
198
199 /* Bars and Colors should match positions */
200
201 enum colors {
202 WHITE,
203 AMBAR,
204 CYAN,
205 GREEN,
206 MAGENTA,
207 RED,
208 BLUE,
209 BLACK,
210 };
211
212 static u8 bars[8][3] = {
213 /* R G B */
214 {204, 204, 204}, /* white */
215 {208, 208, 0}, /* ambar */
216 { 0, 206, 206}, /* cyan */
217 { 0, 239, 0}, /* green */
218 {239, 0, 239}, /* magenta */
219 {205, 0, 0}, /* red */
220 { 0, 0, 255}, /* blue */
221 { 0, 0, 0}, /* black */
222 };
223
224 #define TO_Y(r, g, b) \
225 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
226 /* RGB to V(Cr) Color transform */
227 #define TO_V(r, g, b) \
228 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
229 /* RGB to U(Cb) Color transform */
230 #define TO_U(r, g, b) \
231 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
232
233 #define TSTAMP_MIN_Y 24
234 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
235 #define TSTAMP_MIN_X 64
236
237 static void gen_line(char *basep, int inipos, int wmax,
238 int hmax, int line, int count, char *timestr)
239 {
240 int w, i, j, y;
241 int pos = inipos;
242 char *p, *s;
243 u8 chr, r, g, b, color;
244
245 /* We will just duplicate the second pixel at the packet */
246 wmax /= 2;
247
248 /* Generate a standard color bar pattern */
249 for (w = 0; w < wmax; w++) {
250 int colorpos = ((w + count) * 8/(wmax + 1)) % 8;
251 r = bars[colorpos][0];
252 g = bars[colorpos][1];
253 b = bars[colorpos][2];
254
255 for (color = 0; color < 4; color++) {
256 p = basep + pos;
257
258 switch (color) {
259 case 0:
260 case 2:
261 *p = TO_Y(r, g, b); /* Luma */
262 break;
263 case 1:
264 *p = TO_U(r, g, b); /* Cb */
265 break;
266 case 3:
267 *p = TO_V(r, g, b); /* Cr */
268 break;
269 }
270 pos++;
271 }
272 }
273
274 /* Checks if it is possible to show timestamp */
275 if (TSTAMP_MAX_Y >= hmax)
276 goto end;
277 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
278 goto end;
279
280 /* Print stream time */
281 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
282 j = TSTAMP_MIN_X;
283 for (s = timestr; *s; s++) {
284 chr = rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
285 for (i = 0; i < 7; i++) {
286 if (chr & 1 << (7 - i)) {
287 /* Font color*/
288 r = 0;
289 g = 198;
290 b = 0;
291 } else {
292 /* Background color */
293 r = bars[BLACK][0];
294 g = bars[BLACK][1];
295 b = bars[BLACK][2];
296 }
297
298 pos = inipos + j * 2;
299 for (color = 0; color < 4; color++) {
300 p = basep + pos;
301
302 y = TO_Y(r, g, b);
303
304 switch (color) {
305 case 0:
306 case 2:
307 *p = TO_Y(r, g, b); /* Luma */
308 break;
309 case 1:
310 *p = TO_U(r, g, b); /* Cb */
311 break;
312 case 3:
313 *p = TO_V(r, g, b); /* Cr */
314 break;
315 }
316 pos++;
317 }
318 j++;
319 }
320 }
321 }
322
323 end:
324 return;
325 }
326
327 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
328 {
329 int h , pos = 0;
330 int hmax = buf->vb.height;
331 int wmax = buf->vb.width;
332 struct timeval ts;
333 char *tmpbuf;
334 void *vbuf = videobuf_to_vmalloc(&buf->vb);
335
336 if (!vbuf)
337 return;
338
339 tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
340 if (!tmpbuf)
341 return;
342
343 for (h = 0; h < hmax; h++) {
344 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
345 dev->timestr);
346 memcpy(vbuf + pos, tmpbuf, wmax * 2);
347 pos += wmax*2;
348 }
349
350 dev->mv_count++;
351
352 kfree(tmpbuf);
353
354 /* Updates stream time */
355
356 dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
357 dev->jiffies = jiffies;
358 if (dev->ms >= 1000) {
359 dev->ms -= 1000;
360 dev->s++;
361 if (dev->s >= 60) {
362 dev->s -= 60;
363 dev->m++;
364 if (dev->m > 60) {
365 dev->m -= 60;
366 dev->h++;
367 if (dev->h > 24)
368 dev->h -= 24;
369 }
370 }
371 }
372 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
373 dev->h, dev->m, dev->s, dev->ms);
374
375 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
376 dev->timestr, (unsigned long)tmpbuf, pos);
377
378 /* Advice that buffer was filled */
379 buf->vb.field_count++;
380 do_gettimeofday(&ts);
381 buf->vb.ts = ts;
382 buf->vb.state = VIDEOBUF_DONE;
383 }
384
385 static void vivi_thread_tick(struct vivi_fh *fh)
386 {
387 struct vivi_buffer *buf;
388 struct vivi_dev *dev = fh->dev;
389 struct vivi_dmaqueue *dma_q = &dev->vidq;
390
391 unsigned long flags = 0;
392
393 dprintk(dev, 1, "Thread tick\n");
394
395 spin_lock_irqsave(&dev->slock, flags);
396 if (list_empty(&dma_q->active)) {
397 dprintk(dev, 1, "No active queue to serve\n");
398 goto unlock;
399 }
400
401 buf = list_entry(dma_q->active.next,
402 struct vivi_buffer, vb.queue);
403
404 /* Nobody is waiting on this buffer, return */
405 if (!waitqueue_active(&buf->vb.done))
406 goto unlock;
407
408 list_del(&buf->vb.queue);
409
410 do_gettimeofday(&buf->vb.ts);
411
412 /* Fill buffer */
413 vivi_fillbuff(dev, buf);
414 dprintk(dev, 1, "filled buffer %p\n", buf);
415
416 wake_up(&buf->vb.done);
417 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
418 unlock:
419 spin_unlock_irqrestore(&dev->slock, flags);
420 return;
421 }
422
423 #define frames_to_ms(frames) \
424 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
425
426 static void vivi_sleep(struct vivi_fh *fh)
427 {
428 struct vivi_dev *dev = fh->dev;
429 struct vivi_dmaqueue *dma_q = &dev->vidq;
430 int timeout;
431 DECLARE_WAITQUEUE(wait, current);
432
433 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
434 (unsigned long)dma_q);
435
436 add_wait_queue(&dma_q->wq, &wait);
437 if (kthread_should_stop())
438 goto stop_task;
439
440 /* Calculate time to wake up */
441 timeout = msecs_to_jiffies(frames_to_ms(1));
442
443 vivi_thread_tick(fh);
444
445 schedule_timeout_interruptible(timeout);
446
447 stop_task:
448 remove_wait_queue(&dma_q->wq, &wait);
449 try_to_freeze();
450 }
451
452 static int vivi_thread(void *data)
453 {
454 struct vivi_fh *fh = data;
455 struct vivi_dev *dev = fh->dev;
456
457 dprintk(dev, 1, "thread started\n");
458
459 set_freezable();
460
461 for (;;) {
462 vivi_sleep(fh);
463
464 if (kthread_should_stop())
465 break;
466 }
467 dprintk(dev, 1, "thread: exit\n");
468 return 0;
469 }
470
471 static int vivi_start_thread(struct vivi_fh *fh)
472 {
473 struct vivi_dev *dev = fh->dev;
474 struct vivi_dmaqueue *dma_q = &dev->vidq;
475
476 dma_q->frame = 0;
477 dma_q->ini_jiffies = jiffies;
478
479 dprintk(dev, 1, "%s\n", __func__);
480
481 dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
482
483 if (IS_ERR(dma_q->kthread)) {
484 printk(KERN_ERR "vivi: kernel_thread() failed\n");
485 return PTR_ERR(dma_q->kthread);
486 }
487 /* Wakes thread */
488 wake_up_interruptible(&dma_q->wq);
489
490 dprintk(dev, 1, "returning from %s\n", __func__);
491 return 0;
492 }
493
494 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
495 {
496 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
497
498 dprintk(dev, 1, "%s\n", __func__);
499 /* shutdown control thread */
500 if (dma_q->kthread) {
501 kthread_stop(dma_q->kthread);
502 dma_q->kthread = NULL;
503 }
504 }
505
506 /* ------------------------------------------------------------------
507 Videobuf operations
508 ------------------------------------------------------------------*/
509 static int
510 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
511 {
512 struct vivi_fh *fh = vq->priv_data;
513 struct vivi_dev *dev = fh->dev;
514
515 *size = fh->width*fh->height*2;
516
517 if (0 == *count)
518 *count = 32;
519
520 while (*size * *count > vid_limit * 1024 * 1024)
521 (*count)--;
522
523 dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
524 *count, *size);
525
526 return 0;
527 }
528
529 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
530 {
531 struct vivi_fh *fh = vq->priv_data;
532 struct vivi_dev *dev = fh->dev;
533
534 dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
535
536 if (in_interrupt())
537 BUG();
538
539 videobuf_vmalloc_free(&buf->vb);
540 dprintk(dev, 1, "free_buffer: freed\n");
541 buf->vb.state = VIDEOBUF_NEEDS_INIT;
542 }
543
544 #define norm_maxw() 1024
545 #define norm_maxh() 768
546 static int
547 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
548 enum v4l2_field field)
549 {
550 struct vivi_fh *fh = vq->priv_data;
551 struct vivi_dev *dev = fh->dev;
552 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
553 int rc;
554
555 dprintk(dev, 1, "%s, field=%d\n", __func__, field);
556
557 BUG_ON(NULL == fh->fmt);
558
559 if (fh->width < 48 || fh->width > norm_maxw() ||
560 fh->height < 32 || fh->height > norm_maxh())
561 return -EINVAL;
562
563 buf->vb.size = fh->width*fh->height*2;
564 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
565 return -EINVAL;
566
567 /* These properties only change when queue is idle, see s_fmt */
568 buf->fmt = fh->fmt;
569 buf->vb.width = fh->width;
570 buf->vb.height = fh->height;
571 buf->vb.field = field;
572
573 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
574 rc = videobuf_iolock(vq, &buf->vb, NULL);
575 if (rc < 0)
576 goto fail;
577 }
578
579 buf->vb.state = VIDEOBUF_PREPARED;
580
581 return 0;
582
583 fail:
584 free_buffer(vq, buf);
585 return rc;
586 }
587
588 static void
589 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
590 {
591 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
592 struct vivi_fh *fh = vq->priv_data;
593 struct vivi_dev *dev = fh->dev;
594 struct vivi_dmaqueue *vidq = &dev->vidq;
595
596 dprintk(dev, 1, "%s\n", __func__);
597
598 buf->vb.state = VIDEOBUF_QUEUED;
599 list_add_tail(&buf->vb.queue, &vidq->active);
600 }
601
602 static void buffer_release(struct videobuf_queue *vq,
603 struct videobuf_buffer *vb)
604 {
605 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
606 struct vivi_fh *fh = vq->priv_data;
607 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
608
609 dprintk(dev, 1, "%s\n", __func__);
610
611 free_buffer(vq, buf);
612 }
613
614 static struct videobuf_queue_ops vivi_video_qops = {
615 .buf_setup = buffer_setup,
616 .buf_prepare = buffer_prepare,
617 .buf_queue = buffer_queue,
618 .buf_release = buffer_release,
619 };
620
621 /* ------------------------------------------------------------------
622 IOCTL vidioc handling
623 ------------------------------------------------------------------*/
624 static int vidioc_querycap(struct file *file, void *priv,
625 struct v4l2_capability *cap)
626 {
627 strcpy(cap->driver, "vivi");
628 strcpy(cap->card, "vivi");
629 cap->version = VIVI_VERSION;
630 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
631 V4L2_CAP_STREAMING |
632 V4L2_CAP_READWRITE;
633 return 0;
634 }
635
636 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
637 struct v4l2_fmtdesc *f)
638 {
639 if (f->index > 0)
640 return -EINVAL;
641
642 strlcpy(f->description, format.name, sizeof(f->description));
643 f->pixelformat = format.fourcc;
644 return 0;
645 }
646
647 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
648 struct v4l2_format *f)
649 {
650 struct vivi_fh *fh = priv;
651
652 f->fmt.pix.width = fh->width;
653 f->fmt.pix.height = fh->height;
654 f->fmt.pix.field = fh->vb_vidq.field;
655 f->fmt.pix.pixelformat = fh->fmt->fourcc;
656 f->fmt.pix.bytesperline =
657 (f->fmt.pix.width * fh->fmt->depth) >> 3;
658 f->fmt.pix.sizeimage =
659 f->fmt.pix.height * f->fmt.pix.bytesperline;
660
661 return (0);
662 }
663
664 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
665 struct v4l2_format *f)
666 {
667 struct vivi_fh *fh = priv;
668 struct vivi_dev *dev = fh->dev;
669 struct vivi_fmt *fmt;
670 enum v4l2_field field;
671 unsigned int maxw, maxh;
672
673 if (format.fourcc != f->fmt.pix.pixelformat) {
674 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
675 "Driver accepts only 0x%08x\n",
676 f->fmt.pix.pixelformat, format.fourcc);
677 return -EINVAL;
678 }
679 fmt = &format;
680
681 field = f->fmt.pix.field;
682
683 if (field == V4L2_FIELD_ANY) {
684 field = V4L2_FIELD_INTERLACED;
685 } else if (V4L2_FIELD_INTERLACED != field) {
686 dprintk(dev, 1, "Field type invalid.\n");
687 return -EINVAL;
688 }
689
690 maxw = norm_maxw();
691 maxh = norm_maxh();
692
693 f->fmt.pix.field = field;
694 if (f->fmt.pix.height < 32)
695 f->fmt.pix.height = 32;
696 if (f->fmt.pix.height > maxh)
697 f->fmt.pix.height = maxh;
698 if (f->fmt.pix.width < 48)
699 f->fmt.pix.width = 48;
700 if (f->fmt.pix.width > maxw)
701 f->fmt.pix.width = maxw;
702 f->fmt.pix.width &= ~0x03;
703 f->fmt.pix.bytesperline =
704 (f->fmt.pix.width * fmt->depth) >> 3;
705 f->fmt.pix.sizeimage =
706 f->fmt.pix.height * f->fmt.pix.bytesperline;
707
708 return 0;
709 }
710
711 /*FIXME: This seems to be generic enough to be at videodev2 */
712 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
713 struct v4l2_format *f)
714 {
715 struct vivi_fh *fh = priv;
716 struct videobuf_queue *q = &fh->vb_vidq;
717
718 int ret = vidioc_try_fmt_vid_cap(file, fh, f);
719 if (ret < 0)
720 return (ret);
721
722 mutex_lock(&q->vb_lock);
723
724 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
725 dprintk(fh->dev, 1, "%s queue busy\n", __func__);
726 ret = -EBUSY;
727 goto out;
728 }
729
730 fh->fmt = &format;
731 fh->width = f->fmt.pix.width;
732 fh->height = f->fmt.pix.height;
733 fh->vb_vidq.field = f->fmt.pix.field;
734 fh->type = f->type;
735
736 ret = 0;
737 out:
738 mutex_unlock(&q->vb_lock);
739
740 return (ret);
741 }
742
743 static int vidioc_reqbufs(struct file *file, void *priv,
744 struct v4l2_requestbuffers *p)
745 {
746 struct vivi_fh *fh = priv;
747
748 return (videobuf_reqbufs(&fh->vb_vidq, p));
749 }
750
751 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
752 {
753 struct vivi_fh *fh = priv;
754
755 return (videobuf_querybuf(&fh->vb_vidq, p));
756 }
757
758 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
759 {
760 struct vivi_fh *fh = priv;
761
762 return (videobuf_qbuf(&fh->vb_vidq, p));
763 }
764
765 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
766 {
767 struct vivi_fh *fh = priv;
768
769 return (videobuf_dqbuf(&fh->vb_vidq, p,
770 file->f_flags & O_NONBLOCK));
771 }
772
773 #ifdef CONFIG_VIDEO_V4L1_COMPAT
774 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
775 {
776 struct vivi_fh *fh = priv;
777
778 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
779 }
780 #endif
781
782 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
783 {
784 struct vivi_fh *fh = priv;
785
786 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
787 return -EINVAL;
788 if (i != fh->type)
789 return -EINVAL;
790
791 return videobuf_streamon(&fh->vb_vidq);
792 }
793
794 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
795 {
796 struct vivi_fh *fh = priv;
797
798 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
799 return -EINVAL;
800 if (i != fh->type)
801 return -EINVAL;
802
803 return videobuf_streamoff(&fh->vb_vidq);
804 }
805
806 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
807 {
808 return 0;
809 }
810
811 /* only one input in this sample driver */
812 static int vidioc_enum_input(struct file *file, void *priv,
813 struct v4l2_input *inp)
814 {
815 if (inp->index != 0)
816 return -EINVAL;
817
818 inp->type = V4L2_INPUT_TYPE_CAMERA;
819 inp->std = V4L2_STD_525_60;
820 strcpy(inp->name, "Camera");
821
822 return (0);
823 }
824
825 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
826 {
827 *i = 0;
828
829 return (0);
830 }
831 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
832 {
833 if (i > 0)
834 return -EINVAL;
835
836 return (0);
837 }
838
839 /* --- controls ---------------------------------------------- */
840 static int vidioc_queryctrl(struct file *file, void *priv,
841 struct v4l2_queryctrl *qc)
842 {
843 int i;
844
845 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
846 if (qc->id && qc->id == vivi_qctrl[i].id) {
847 memcpy(qc, &(vivi_qctrl[i]),
848 sizeof(*qc));
849 return (0);
850 }
851
852 return -EINVAL;
853 }
854
855 static int vidioc_g_ctrl(struct file *file, void *priv,
856 struct v4l2_control *ctrl)
857 {
858 int i;
859
860 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
861 if (ctrl->id == vivi_qctrl[i].id) {
862 ctrl->value = qctl_regs[i];
863 return (0);
864 }
865
866 return -EINVAL;
867 }
868 static int vidioc_s_ctrl(struct file *file, void *priv,
869 struct v4l2_control *ctrl)
870 {
871 int i;
872
873 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
874 if (ctrl->id == vivi_qctrl[i].id) {
875 if (ctrl->value < vivi_qctrl[i].minimum
876 || ctrl->value > vivi_qctrl[i].maximum) {
877 return (-ERANGE);
878 }
879 qctl_regs[i] = ctrl->value;
880 return (0);
881 }
882 return -EINVAL;
883 }
884
885 /* ------------------------------------------------------------------
886 File operations for the device
887 ------------------------------------------------------------------*/
888
889 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
890
891 static int vivi_open(struct inode *inode, struct file *file)
892 {
893 int minor = iminor(inode);
894 struct vivi_dev *dev;
895 struct vivi_fh *fh = NULL;
896 int i;
897 int retval = 0;
898
899 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
900
901 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
902 if (dev->vfd->minor == minor)
903 goto found;
904 return -ENODEV;
905
906 found:
907 mutex_lock(&dev->mutex);
908 dev->users++;
909
910 if (dev->users > 1) {
911 dev->users--;
912 retval = -EBUSY;
913 goto unlock;
914 }
915
916 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
917 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
918
919 /* allocate + initialize per filehandle data */
920 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
921 if (NULL == fh) {
922 dev->users--;
923 retval = -ENOMEM;
924 goto unlock;
925 }
926 unlock:
927 mutex_unlock(&dev->mutex);
928 if (retval)
929 return retval;
930
931 file->private_data = fh;
932 fh->dev = dev;
933
934 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
935 fh->fmt = &format;
936 fh->width = 640;
937 fh->height = 480;
938
939 /* Put all controls at a sane state */
940 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
941 qctl_regs[i] = vivi_qctrl[i].default_value;
942
943 /* Resets frame counters */
944 dev->h = 0;
945 dev->m = 0;
946 dev->s = 0;
947 dev->ms = 0;
948 dev->mv_count = 0;
949 dev->jiffies = jiffies;
950 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
951 dev->h, dev->m, dev->s, dev->ms);
952
953 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
954 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
955 sizeof(struct vivi_buffer), fh);
956
957 vivi_start_thread(fh);
958
959 return 0;
960 }
961
962 static ssize_t
963 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
964 {
965 struct vivi_fh *fh = file->private_data;
966
967 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
968 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
969 file->f_flags & O_NONBLOCK);
970 }
971 return 0;
972 }
973
974 static unsigned int
975 vivi_poll(struct file *file, struct poll_table_struct *wait)
976 {
977 struct vivi_fh *fh = file->private_data;
978 struct vivi_dev *dev = fh->dev;
979 struct videobuf_queue *q = &fh->vb_vidq;
980
981 dprintk(dev, 1, "%s\n", __func__);
982
983 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
984 return POLLERR;
985
986 return videobuf_poll_stream(file, q, wait);
987 }
988
989 static int vivi_close(struct inode *inode, struct file *file)
990 {
991 struct vivi_fh *fh = file->private_data;
992 struct vivi_dev *dev = fh->dev;
993 struct vivi_dmaqueue *vidq = &dev->vidq;
994
995 int minor = iminor(inode);
996
997 vivi_stop_thread(vidq);
998 videobuf_stop(&fh->vb_vidq);
999 videobuf_mmap_free(&fh->vb_vidq);
1000
1001 kfree(fh);
1002
1003 mutex_lock(&dev->mutex);
1004 dev->users--;
1005 mutex_unlock(&dev->mutex);
1006
1007 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1008 minor, dev->users);
1009
1010 return 0;
1011 }
1012
1013 static int vivi_release(void)
1014 {
1015 struct vivi_dev *dev;
1016 struct list_head *list;
1017
1018 while (!list_empty(&vivi_devlist)) {
1019 list = vivi_devlist.next;
1020 list_del(list);
1021 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1022
1023 if (-1 != dev->vfd->minor) {
1024 video_unregister_device(dev->vfd);
1025 printk(KERN_INFO "%s: /dev/video%d unregistered.\n",
1026 VIVI_MODULE_NAME, dev->vfd->minor);
1027 } else {
1028 video_device_release(dev->vfd);
1029 printk(KERN_INFO "%s: /dev/video%d released.\n",
1030 VIVI_MODULE_NAME, dev->vfd->minor);
1031 }
1032
1033 kfree(dev);
1034 }
1035
1036 return 0;
1037 }
1038
1039 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1040 {
1041 struct vivi_fh *fh = file->private_data;
1042 struct vivi_dev *dev = fh->dev;
1043 int ret;
1044
1045 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1046
1047 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1048
1049 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1050 (unsigned long)vma->vm_start,
1051 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1052 ret);
1053
1054 return ret;
1055 }
1056
1057 static const struct file_operations vivi_fops = {
1058 .owner = THIS_MODULE,
1059 .open = vivi_open,
1060 .release = vivi_close,
1061 .read = vivi_read,
1062 .poll = vivi_poll,
1063 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1064 .compat_ioctl = v4l_compat_ioctl32,
1065 .mmap = vivi_mmap,
1066 .llseek = no_llseek,
1067 };
1068
1069 static const struct v4l2_ioctl_ops vivi_ioctl_ops = {
1070 .vidioc_querycap = vidioc_querycap,
1071 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1072 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1073 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1074 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1075 .vidioc_reqbufs = vidioc_reqbufs,
1076 .vidioc_querybuf = vidioc_querybuf,
1077 .vidioc_qbuf = vidioc_qbuf,
1078 .vidioc_dqbuf = vidioc_dqbuf,
1079 .vidioc_s_std = vidioc_s_std,
1080 .vidioc_enum_input = vidioc_enum_input,
1081 .vidioc_g_input = vidioc_g_input,
1082 .vidioc_s_input = vidioc_s_input,
1083 .vidioc_queryctrl = vidioc_queryctrl,
1084 .vidioc_g_ctrl = vidioc_g_ctrl,
1085 .vidioc_s_ctrl = vidioc_s_ctrl,
1086 .vidioc_streamon = vidioc_streamon,
1087 .vidioc_streamoff = vidioc_streamoff,
1088 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1089 .vidiocgmbuf = vidiocgmbuf,
1090 #endif
1091 };
1092
1093 static struct video_device vivi_template = {
1094 .name = "vivi",
1095 .type = VID_TYPE_CAPTURE,
1096 .fops = &vivi_fops,
1097 .ioctl_ops = &vivi_ioctl_ops,
1098 .minor = -1,
1099 .release = video_device_release,
1100
1101 .tvnorms = V4L2_STD_525_60,
1102 .current_norm = V4L2_STD_NTSC_M,
1103 };
1104 /* -----------------------------------------------------------------
1105 Initialization and module stuff
1106 ------------------------------------------------------------------*/
1107
1108 static int __init vivi_init(void)
1109 {
1110 int ret = -ENOMEM, i;
1111 struct vivi_dev *dev;
1112 struct video_device *vfd;
1113
1114 for (i = 0; i < n_devs; i++) {
1115 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1116 if (NULL == dev)
1117 break;
1118
1119 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1120
1121 /* init video dma queues */
1122 INIT_LIST_HEAD(&dev->vidq.active);
1123 init_waitqueue_head(&dev->vidq.wq);
1124
1125 /* initialize locks */
1126 spin_lock_init(&dev->slock);
1127 mutex_init(&dev->mutex);
1128
1129 vfd = video_device_alloc();
1130 if (NULL == vfd)
1131 break;
1132
1133 *vfd = vivi_template;
1134
1135 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1136 if (ret < 0)
1137 break;
1138
1139 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1140 vivi_template.name, vfd->minor);
1141
1142 if (video_nr >= 0)
1143 video_nr++;
1144
1145 dev->vfd = vfd;
1146 printk(KERN_INFO "%s: V4L2 device registered as /dev/video%d\n",
1147 VIVI_MODULE_NAME, vfd->minor);
1148 }
1149
1150 if (ret < 0) {
1151 vivi_release();
1152 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1153 } else
1154 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1155 "Capture Board ver %u.%u.%u successfully loaded.\n",
1156 (VIVI_VERSION >> 16) & 0xFF, (VIVI_VERSION >> 8) & 0xFF,
1157 VIVI_VERSION & 0xFF);
1158 return ret;
1159 }
1160
1161 static void __exit vivi_exit(void)
1162 {
1163 vivi_release();
1164 }
1165
1166 module_init(vivi_init);
1167 module_exit(vivi_exit);
1168
1169 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1170 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1171 MODULE_LICENSE("Dual BSD/GPL");
1172
1173 module_param(video_nr, int, 0);
1174 MODULE_PARM_DESC(video_nr, "video iminor start number");
1175
1176 module_param(n_devs, int, 0);
1177 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1178
1179 module_param_named(debug, vivi_template.debug, int, 0444);
1180 MODULE_PARM_DESC(debug, "activates debug info");
1181
1182 module_param(vid_limit, int, 0644);
1183 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
AMDTP streaming driver for the Linux FireWire stack (Juju)