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ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / drivers / media / video / vivi.c
blob845be1864f685a01fad3a225bc9826ab09d61985
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 <linux/kthread.h>
39 #include <linux/highmem.h>
40 #include <linux/freezer.h>
41
42 /* Wake up at about 30 fps */
43 #define WAKE_NUMERATOR 30
44 #define WAKE_DENOMINATOR 1001
45 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46
47 #include "font.h"
48
49 #define VIVI_MAJOR_VERSION 0
50 #define VIVI_MINOR_VERSION 4
51 #define VIVI_RELEASE 0
52 #define VIVI_VERSION \
53 KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
54
55 /* Declare static vars that will be used as parameters */
56 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
57 static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
58 static int n_devs = 1; /* Number of virtual devices */
59
60 /* supported controls */
61 static struct v4l2_queryctrl vivi_qctrl[] = {
62 {
63 .id = V4L2_CID_AUDIO_VOLUME,
64 .name = "Volume",
65 .minimum = 0,
66 .maximum = 65535,
67 .step = 65535/100,
68 .default_value = 65535,
69 .flags = 0,
70 .type = V4L2_CTRL_TYPE_INTEGER,
71 }, {
72 .id = V4L2_CID_BRIGHTNESS,
73 .type = V4L2_CTRL_TYPE_INTEGER,
74 .name = "Brightness",
75 .minimum = 0,
76 .maximum = 255,
77 .step = 1,
78 .default_value = 127,
79 .flags = 0,
80 }, {
81 .id = V4L2_CID_CONTRAST,
82 .type = V4L2_CTRL_TYPE_INTEGER,
83 .name = "Contrast",
84 .minimum = 0,
85 .maximum = 255,
86 .step = 0x1,
87 .default_value = 0x10,
88 .flags = 0,
89 }, {
90 .id = V4L2_CID_SATURATION,
91 .type = V4L2_CTRL_TYPE_INTEGER,
92 .name = "Saturation",
93 .minimum = 0,
94 .maximum = 255,
95 .step = 0x1,
96 .default_value = 127,
97 .flags = 0,
98 }, {
99 .id = V4L2_CID_HUE,
100 .type = V4L2_CTRL_TYPE_INTEGER,
101 .name = "Hue",
102 .minimum = -128,
103 .maximum = 127,
104 .step = 0x1,
105 .default_value = 0,
106 .flags = 0,
107 }
108 };
109
110 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
111
112 #define dprintk(dev, level, fmt, arg...) \
113 do { \
114 if (dev->vfd->debug >= (level)) \
115 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
116 } while (0)
117
118 /* ------------------------------------------------------------------
119 Basic structures
120 ------------------------------------------------------------------*/
121
122 struct vivi_fmt {
123 char *name;
124 u32 fourcc; /* v4l2 format id */
125 int depth;
126 };
127
128 static struct vivi_fmt format = {
129 .name = "4:2:2, packed, YUYV",
130 .fourcc = V4L2_PIX_FMT_YUYV,
131 .depth = 16,
132 };
133
134 struct sg_to_addr {
135 int pos;
136 struct scatterlist *sg;
137 };
138
139 /* buffer for one video frame */
140 struct vivi_buffer {
141 /* common v4l buffer stuff -- must be first */
142 struct videobuf_buffer vb;
143
144 struct vivi_fmt *fmt;
145 };
146
147 struct vivi_dmaqueue {
148 struct list_head active;
149
150 /* thread for generating video stream*/
151 struct task_struct *kthread;
152 wait_queue_head_t wq;
153 /* Counters to control fps rate */
154 int frame;
155 int ini_jiffies;
156 };
157
158 static LIST_HEAD(vivi_devlist);
159
160 struct vivi_dev {
161 struct list_head vivi_devlist;
162
163 spinlock_t slock;
164 struct mutex mutex;
165
166 int users;
167
168 /* various device info */
169 struct video_device *vfd;
170
171 struct vivi_dmaqueue vidq;
172
173 /* Several counters */
174 int h, m, s, ms;
175 unsigned long jiffies;
176 char timestr[13];
177
178 int mv_count; /* Controls bars movement */
179 };
180
181 struct vivi_fh {
182 struct vivi_dev *dev;
183
184 /* video capture */
185 struct vivi_fmt *fmt;
186 unsigned int width, height;
187 struct videobuf_queue vb_vidq;
188
189 enum v4l2_buf_type type;
190 };
191
192 /* ------------------------------------------------------------------
193 DMA and thread functions
194 ------------------------------------------------------------------*/
195
196 /* Bars and Colors should match positions */
197
198 enum colors {
199 WHITE,
200 AMBAR,
201 CYAN,
202 GREEN,
203 MAGENTA,
204 RED,
205 BLUE,
206 BLACK,
207 };
208
209 static u8 bars[8][3] = {
210 /* R G B */
211 {204, 204, 204}, /* white */
212 {208, 208, 0}, /* ambar */
213 { 0, 206, 206}, /* cyan */
214 { 0, 239, 0}, /* green */
215 {239, 0, 239}, /* magenta */
216 {205, 0, 0}, /* red */
217 { 0, 0, 255}, /* blue */
218 { 0, 0, 0}, /* black */
219 };
220
221 #define TO_Y(r, g, b) \
222 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
223 /* RGB to V(Cr) Color transform */
224 #define TO_V(r, g, b) \
225 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
226 /* RGB to U(Cb) Color transform */
227 #define TO_U(r, g, b) \
228 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
229
230 #define TSTAMP_MIN_Y 24
231 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
232 #define TSTAMP_MIN_X 64
233
234 static void gen_line(char *basep, int inipos, int wmax,
235 int hmax, int line, int count, char *timestr)
236 {
237 int w, i, j, y;
238 int pos = inipos;
239 char *p, *s;
240 u8 chr, r, g, b, color;
241
242 /* We will just duplicate the second pixel at the packet */
243 wmax /= 2;
244
245 /* Generate a standard color bar pattern */
246 for (w = 0; w < wmax; w++) {
247 int colorpos = ((w + count) * 8/(wmax + 1)) % 8;
248 r = bars[colorpos][0];
249 g = bars[colorpos][1];
250 b = bars[colorpos][2];
251
252 for (color = 0; color < 4; color++) {
253 p = basep + pos;
254
255 switch (color) {
256 case 0:
257 case 2:
258 *p = TO_Y(r, g, b); /* Luma */
259 break;
260 case 1:
261 *p = TO_U(r, g, b); /* Cb */
262 break;
263 case 3:
264 *p = TO_V(r, g, b); /* Cr */
265 break;
266 }
267 pos++;
268 }
269 }
270
271 /* Checks if it is possible to show timestamp */
272 if (TSTAMP_MAX_Y >= hmax)
273 goto end;
274 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
275 goto end;
276
277 /* Print stream time */
278 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
279 j = TSTAMP_MIN_X;
280 for (s = timestr; *s; s++) {
281 chr = rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
282 for (i = 0; i < 7; i++) {
283 if (chr & 1 << (7 - i)) {
284 /* Font color*/
285 r = 0;
286 g = 198;
287 b = 0;
288 } else {
289 /* Background color */
290 r = bars[BLACK][0];
291 g = bars[BLACK][1];
292 b = bars[BLACK][2];
293 }
294
295 pos = inipos + j * 2;
296 for (color = 0; color < 4; color++) {
297 p = basep + pos;
298
299 y = TO_Y(r, g, b);
300
301 switch (color) {
302 case 0:
303 case 2:
304 *p = TO_Y(r, g, b); /* Luma */
305 break;
306 case 1:
307 *p = TO_U(r, g, b); /* Cb */
308 break;
309 case 3:
310 *p = TO_V(r, g, b); /* Cr */
311 break;
312 }
313 pos++;
314 }
315 j++;
316 }
317 }
318 }
319
320 end:
321 return;
322 }
323
324 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
325 {
326 int h , pos = 0;
327 int hmax = buf->vb.height;
328 int wmax = buf->vb.width;
329 struct timeval ts;
330 char *tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
331 void *vbuf = videobuf_to_vmalloc(&buf->vb);
332
333 if (!tmpbuf)
334 return;
335
336 if (!vbuf)
337 return;
338
339 for (h = 0; h < hmax; h++) {
340 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
341 dev->timestr);
342 memcpy(vbuf + pos, tmpbuf, wmax * 2);
343 pos += wmax*2;
344 }
345
346 dev->mv_count++;
347
348 kfree(tmpbuf);
349
350 /* Updates stream time */
351
352 dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
353 dev->jiffies = jiffies;
354 if (dev->ms >= 1000) {
355 dev->ms -= 1000;
356 dev->s++;
357 if (dev->s >= 60) {
358 dev->s -= 60;
359 dev->m++;
360 if (dev->m > 60) {
361 dev->m -= 60;
362 dev->h++;
363 if (dev->h > 24)
364 dev->h -= 24;
365 }
366 }
367 }
368 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
369 dev->h, dev->m, dev->s, dev->ms);
370
371 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
372 dev->timestr, (unsigned long)tmpbuf, pos);
373
374 /* Advice that buffer was filled */
375 buf->vb.field_count++;
376 do_gettimeofday(&ts);
377 buf->vb.ts = ts;
378 buf->vb.state = VIDEOBUF_DONE;
379 }
380
381 static void vivi_thread_tick(struct vivi_fh *fh)
382 {
383 struct vivi_buffer *buf;
384 struct vivi_dev *dev = fh->dev;
385 struct vivi_dmaqueue *dma_q = &dev->vidq;
386
387 unsigned long flags = 0;
388
389 dprintk(dev, 1, "Thread tick\n");
390
391 spin_lock_irqsave(&dev->slock, flags);
392 if (list_empty(&dma_q->active)) {
393 dprintk(dev, 1, "No active queue to serve\n");
394 goto unlock;
395 }
396
397 buf = list_entry(dma_q->active.next,
398 struct vivi_buffer, vb.queue);
399
400 /* Nobody is waiting on this buffer, return */
401 if (!waitqueue_active(&buf->vb.done))
402 goto unlock;
403
404 list_del(&buf->vb.queue);
405
406 do_gettimeofday(&buf->vb.ts);
407
408 /* Fill buffer */
409 vivi_fillbuff(dev, buf);
410 dprintk(dev, 1, "filled buffer %p\n", buf);
411
412 wake_up(&buf->vb.done);
413 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
414 unlock:
415 spin_unlock_irqrestore(&dev->slock, flags);
416 return;
417 }
418
419 #define frames_to_ms(frames) \
420 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
421
422 static void vivi_sleep(struct vivi_fh *fh)
423 {
424 struct vivi_dev *dev = fh->dev;
425 struct vivi_dmaqueue *dma_q = &dev->vidq;
426 int timeout;
427 DECLARE_WAITQUEUE(wait, current);
428
429 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
430 (unsigned long)dma_q);
431
432 add_wait_queue(&dma_q->wq, &wait);
433 if (kthread_should_stop())
434 goto stop_task;
435
436 /* Calculate time to wake up */
437 timeout = msecs_to_jiffies(frames_to_ms(1));
438
439 vivi_thread_tick(fh);
440
441 schedule_timeout_interruptible(timeout);
442
443 stop_task:
444 remove_wait_queue(&dma_q->wq, &wait);
445 try_to_freeze();
446 }
447
448 static int vivi_thread(void *data)
449 {
450 struct vivi_fh *fh = data;
451 struct vivi_dev *dev = fh->dev;
452
453 dprintk(dev, 1, "thread started\n");
454
455 set_freezable();
456
457 for (;;) {
458 vivi_sleep(fh);
459
460 if (kthread_should_stop())
461 break;
462 }
463 dprintk(dev, 1, "thread: exit\n");
464 return 0;
465 }
466
467 static int vivi_start_thread(struct vivi_fh *fh)
468 {
469 struct vivi_dev *dev = fh->dev;
470 struct vivi_dmaqueue *dma_q = &dev->vidq;
471
472 dma_q->frame = 0;
473 dma_q->ini_jiffies = jiffies;
474
475 dprintk(dev, 1, "%s\n", __func__);
476
477 dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
478
479 if (IS_ERR(dma_q->kthread)) {
480 printk(KERN_ERR "vivi: kernel_thread() failed\n");
481 return PTR_ERR(dma_q->kthread);
482 }
483 /* Wakes thread */
484 wake_up_interruptible(&dma_q->wq);
485
486 dprintk(dev, 1, "returning from %s\n", __func__);
487 return 0;
488 }
489
490 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
491 {
492 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
493
494 dprintk(dev, 1, "%s\n", __func__);
495 /* shutdown control thread */
496 if (dma_q->kthread) {
497 kthread_stop(dma_q->kthread);
498 dma_q->kthread = NULL;
499 }
500 }
501
502 /* ------------------------------------------------------------------
503 Videobuf operations
504 ------------------------------------------------------------------*/
505 static int
506 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
507 {
508 struct vivi_fh *fh = vq->priv_data;
509 struct vivi_dev *dev = fh->dev;
510
511 *size = fh->width*fh->height*2;
512
513 if (0 == *count)
514 *count = 32;
515
516 while (*size * *count > vid_limit * 1024 * 1024)
517 (*count)--;
518
519 dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
520 *count, *size);
521
522 return 0;
523 }
524
525 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
526 {
527 struct vivi_fh *fh = vq->priv_data;
528 struct vivi_dev *dev = fh->dev;
529
530 dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
531
532 if (in_interrupt())
533 BUG();
534
535 videobuf_vmalloc_free(&buf->vb);
536 dprintk(dev, 1, "free_buffer: freed\n");
537 buf->vb.state = VIDEOBUF_NEEDS_INIT;
538 }
539
540 #define norm_maxw() 1024
541 #define norm_maxh() 768
542 static int
543 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
544 enum v4l2_field field)
545 {
546 struct vivi_fh *fh = vq->priv_data;
547 struct vivi_dev *dev = fh->dev;
548 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
549 int rc;
550
551 dprintk(dev, 1, "%s, field=%d\n", __func__, field);
552
553 BUG_ON(NULL == fh->fmt);
554
555 if (fh->width < 48 || fh->width > norm_maxw() ||
556 fh->height < 32 || fh->height > norm_maxh())
557 return -EINVAL;
558
559 buf->vb.size = fh->width*fh->height*2;
560 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
561 return -EINVAL;
562
563 /* These properties only change when queue is idle, see s_fmt */
564 buf->fmt = fh->fmt;
565 buf->vb.width = fh->width;
566 buf->vb.height = fh->height;
567 buf->vb.field = field;
568
569 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
570 rc = videobuf_iolock(vq, &buf->vb, NULL);
571 if (rc < 0)
572 goto fail;
573 }
574
575 buf->vb.state = VIDEOBUF_PREPARED;
576
577 return 0;
578
579 fail:
580 free_buffer(vq, buf);
581 return rc;
582 }
583
584 static void
585 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
586 {
587 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
588 struct vivi_fh *fh = vq->priv_data;
589 struct vivi_dev *dev = fh->dev;
590 struct vivi_dmaqueue *vidq = &dev->vidq;
591
592 dprintk(dev, 1, "%s\n", __func__);
593
594 buf->vb.state = VIDEOBUF_QUEUED;
595 list_add_tail(&buf->vb.queue, &vidq->active);
596 }
597
598 static void buffer_release(struct videobuf_queue *vq,
599 struct videobuf_buffer *vb)
600 {
601 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
602 struct vivi_fh *fh = vq->priv_data;
603 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
604
605 dprintk(dev, 1, "%s\n", __func__);
606
607 free_buffer(vq, buf);
608 }
609
610 static struct videobuf_queue_ops vivi_video_qops = {
611 .buf_setup = buffer_setup,
612 .buf_prepare = buffer_prepare,
613 .buf_queue = buffer_queue,
614 .buf_release = buffer_release,
615 };
616
617 /* ------------------------------------------------------------------
618 IOCTL vidioc handling
619 ------------------------------------------------------------------*/
620 static int vidioc_querycap(struct file *file, void *priv,
621 struct v4l2_capability *cap)
622 {
623 strcpy(cap->driver, "vivi");
624 strcpy(cap->card, "vivi");
625 cap->version = VIVI_VERSION;
626 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
627 V4L2_CAP_STREAMING |
628 V4L2_CAP_READWRITE;
629 return 0;
630 }
631
632 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
633 struct v4l2_fmtdesc *f)
634 {
635 if (f->index > 0)
636 return -EINVAL;
637
638 strlcpy(f->description, format.name, sizeof(f->description));
639 f->pixelformat = format.fourcc;
640 return 0;
641 }
642
643 static int vidioc_g_fmt_cap(struct file *file, void *priv,
644 struct v4l2_format *f)
645 {
646 struct vivi_fh *fh = priv;
647
648 f->fmt.pix.width = fh->width;
649 f->fmt.pix.height = fh->height;
650 f->fmt.pix.field = fh->vb_vidq.field;
651 f->fmt.pix.pixelformat = fh->fmt->fourcc;
652 f->fmt.pix.bytesperline =
653 (f->fmt.pix.width * fh->fmt->depth) >> 3;
654 f->fmt.pix.sizeimage =
655 f->fmt.pix.height * f->fmt.pix.bytesperline;
656
657 return (0);
658 }
659
660 static int vidioc_try_fmt_cap(struct file *file, void *priv,
661 struct v4l2_format *f)
662 {
663 struct vivi_fh *fh = priv;
664 struct vivi_dev *dev = fh->dev;
665 struct vivi_fmt *fmt;
666 enum v4l2_field field;
667 unsigned int maxw, maxh;
668
669 if (format.fourcc != f->fmt.pix.pixelformat) {
670 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
671 "Driver accepts only 0x%08x\n",
672 f->fmt.pix.pixelformat, format.fourcc);
673 return -EINVAL;
674 }
675 fmt = &format;
676
677 field = f->fmt.pix.field;
678
679 if (field == V4L2_FIELD_ANY) {
680 field = V4L2_FIELD_INTERLACED;
681 } else if (V4L2_FIELD_INTERLACED != field) {
682 dprintk(dev, 1, "Field type invalid.\n");
683 return -EINVAL;
684 }
685
686 maxw = norm_maxw();
687 maxh = norm_maxh();
688
689 f->fmt.pix.field = field;
690 if (f->fmt.pix.height < 32)
691 f->fmt.pix.height = 32;
692 if (f->fmt.pix.height > maxh)
693 f->fmt.pix.height = maxh;
694 if (f->fmt.pix.width < 48)
695 f->fmt.pix.width = 48;
696 if (f->fmt.pix.width > maxw)
697 f->fmt.pix.width = maxw;
698 f->fmt.pix.width &= ~0x03;
699 f->fmt.pix.bytesperline =
700 (f->fmt.pix.width * fmt->depth) >> 3;
701 f->fmt.pix.sizeimage =
702 f->fmt.pix.height * f->fmt.pix.bytesperline;
703
704 return 0;
705 }
706
707 /*FIXME: This seems to be generic enough to be at videodev2 */
708 static int vidioc_s_fmt_cap(struct file *file, void *priv,
709 struct v4l2_format *f)
710 {
711 struct vivi_fh *fh = priv;
712 struct videobuf_queue *q = &fh->vb_vidq;
713
714 int ret = vidioc_try_fmt_cap(file, fh, f);
715 if (ret < 0)
716 return (ret);
717
718 mutex_lock(&q->vb_lock);
719
720 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
721 dprintk(fh->dev, 1, "%s queue busy\n", __func__);
722 ret = -EBUSY;
723 goto out;
724 }
725
726 fh->fmt = &format;
727 fh->width = f->fmt.pix.width;
728 fh->height = f->fmt.pix.height;
729 fh->vb_vidq.field = f->fmt.pix.field;
730 fh->type = f->type;
731
732 ret = 0;
733 out:
734 mutex_unlock(&q->vb_lock);
735
736 return (ret);
737 }
738
739 static int vidioc_reqbufs(struct file *file, void *priv,
740 struct v4l2_requestbuffers *p)
741 {
742 struct vivi_fh *fh = priv;
743
744 return (videobuf_reqbufs(&fh->vb_vidq, p));
745 }
746
747 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
748 {
749 struct vivi_fh *fh = priv;
750
751 return (videobuf_querybuf(&fh->vb_vidq, p));
752 }
753
754 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
755 {
756 struct vivi_fh *fh = priv;
757
758 return (videobuf_qbuf(&fh->vb_vidq, p));
759 }
760
761 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
762 {
763 struct vivi_fh *fh = priv;
764
765 return (videobuf_dqbuf(&fh->vb_vidq, p,
766 file->f_flags & O_NONBLOCK));
767 }
768
769 #ifdef CONFIG_VIDEO_V4L1_COMPAT
770 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
771 {
772 struct vivi_fh *fh = priv;
773
774 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
775 }
776 #endif
777
778 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
779 {
780 struct vivi_fh *fh = priv;
781
782 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
783 return -EINVAL;
784 if (i != fh->type)
785 return -EINVAL;
786
787 return videobuf_streamon(&fh->vb_vidq);
788 }
789
790 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
791 {
792 struct vivi_fh *fh = priv;
793
794 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
795 return -EINVAL;
796 if (i != fh->type)
797 return -EINVAL;
798
799 return videobuf_streamoff(&fh->vb_vidq);
800 }
801
802 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
803 {
804 return 0;
805 }
806
807 /* only one input in this sample driver */
808 static int vidioc_enum_input(struct file *file, void *priv,
809 struct v4l2_input *inp)
810 {
811 if (inp->index != 0)
812 return -EINVAL;
813
814 inp->type = V4L2_INPUT_TYPE_CAMERA;
815 inp->std = V4L2_STD_525_60;
816 strcpy(inp->name, "Camera");
817
818 return (0);
819 }
820
821 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
822 {
823 *i = 0;
824
825 return (0);
826 }
827 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
828 {
829 if (i > 0)
830 return -EINVAL;
831
832 return (0);
833 }
834
835 /* --- controls ---------------------------------------------- */
836 static int vidioc_queryctrl(struct file *file, void *priv,
837 struct v4l2_queryctrl *qc)
838 {
839 int i;
840
841 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
842 if (qc->id && qc->id == vivi_qctrl[i].id) {
843 memcpy(qc, &(vivi_qctrl[i]),
844 sizeof(*qc));
845 return (0);
846 }
847
848 return -EINVAL;
849 }
850
851 static int vidioc_g_ctrl(struct file *file, void *priv,
852 struct v4l2_control *ctrl)
853 {
854 int i;
855
856 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
857 if (ctrl->id == vivi_qctrl[i].id) {
858 ctrl->value = qctl_regs[i];
859 return (0);
860 }
861
862 return -EINVAL;
863 }
864 static int vidioc_s_ctrl(struct file *file, void *priv,
865 struct v4l2_control *ctrl)
866 {
867 int i;
868
869 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
870 if (ctrl->id == vivi_qctrl[i].id) {
871 if (ctrl->value < vivi_qctrl[i].minimum
872 || ctrl->value > vivi_qctrl[i].maximum) {
873 return (-ERANGE);
874 }
875 qctl_regs[i] = ctrl->value;
876 return (0);
877 }
878 return -EINVAL;
879 }
880
881 /* ------------------------------------------------------------------
882 File operations for the device
883 ------------------------------------------------------------------*/
884
885 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
886
887 static int vivi_open(struct inode *inode, struct file *file)
888 {
889 int minor = iminor(inode);
890 struct vivi_dev *dev;
891 struct vivi_fh *fh = NULL;
892 int i;
893 int retval = 0;
894
895 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
896
897 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
898 if (dev->vfd->minor == minor)
899 goto found;
900 return -ENODEV;
901
902 found:
903 mutex_lock(&dev->mutex);
904 dev->users++;
905
906 if (dev->users > 1) {
907 dev->users--;
908 retval = -EBUSY;
909 goto unlock;
910 }
911
912 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
913 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
914
915 /* allocate + initialize per filehandle data */
916 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
917 if (NULL == fh) {
918 dev->users--;
919 retval = -ENOMEM;
920 goto unlock;
921 }
922 unlock:
923 mutex_unlock(&dev->mutex);
924 if (retval)
925 return retval;
926
927 file->private_data = fh;
928 fh->dev = dev;
929
930 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
931 fh->fmt = &format;
932 fh->width = 640;
933 fh->height = 480;
934
935 /* Put all controls at a sane state */
936 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
937 qctl_regs[i] = vivi_qctrl[i].default_value;
938
939 /* Resets frame counters */
940 dev->h = 0;
941 dev->m = 0;
942 dev->s = 0;
943 dev->ms = 0;
944 dev->mv_count = 0;
945 dev->jiffies = jiffies;
946 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
947 dev->h, dev->m, dev->s, dev->ms);
948
949 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
950 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
951 sizeof(struct vivi_buffer), fh);
952
953 vivi_start_thread(fh);
954
955 return 0;
956 }
957
958 static ssize_t
959 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
960 {
961 struct vivi_fh *fh = file->private_data;
962
963 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
964 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
965 file->f_flags & O_NONBLOCK);
966 }
967 return 0;
968 }
969
970 static unsigned int
971 vivi_poll(struct file *file, struct poll_table_struct *wait)
972 {
973 struct vivi_fh *fh = file->private_data;
974 struct vivi_dev *dev = fh->dev;
975 struct videobuf_queue *q = &fh->vb_vidq;
976
977 dprintk(dev, 1, "%s\n", __func__);
978
979 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
980 return POLLERR;
981
982 return videobuf_poll_stream(file, q, wait);
983 }
984
985 static int vivi_close(struct inode *inode, struct file *file)
986 {
987 struct vivi_fh *fh = file->private_data;
988 struct vivi_dev *dev = fh->dev;
989 struct vivi_dmaqueue *vidq = &dev->vidq;
990
991 int minor = iminor(inode);
992
993 vivi_stop_thread(vidq);
994 videobuf_stop(&fh->vb_vidq);
995 videobuf_mmap_free(&fh->vb_vidq);
996
997 kfree(fh);
998
999 mutex_lock(&dev->mutex);
1000 dev->users--;
1001 mutex_unlock(&dev->mutex);
1002
1003 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1004 minor, dev->users);
1005
1006 return 0;
1007 }
1008
1009 static int vivi_release(void)
1010 {
1011 struct vivi_dev *dev;
1012 struct list_head *list;
1013
1014 while (!list_empty(&vivi_devlist)) {
1015 list = vivi_devlist.next;
1016 list_del(list);
1017 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1018
1019 if (-1 != dev->vfd->minor)
1020 video_unregister_device(dev->vfd);
1021 else
1022 video_device_release(dev->vfd);
1023
1024 kfree(dev);
1025 }
1026
1027 return 0;
1028 }
1029
1030 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1031 {
1032 struct vivi_fh *fh = file->private_data;
1033 struct vivi_dev *dev = fh->dev;
1034 int ret;
1035
1036 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1037
1038 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1039
1040 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1041 (unsigned long)vma->vm_start,
1042 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1043 ret);
1044
1045 return ret;
1046 }
1047
1048 static const struct file_operations vivi_fops = {
1049 .owner = THIS_MODULE,
1050 .open = vivi_open,
1051 .release = vivi_close,
1052 .read = vivi_read,
1053 .poll = vivi_poll,
1054 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1055 .compat_ioctl = v4l_compat_ioctl32,
1056 .mmap = vivi_mmap,
1057 .llseek = no_llseek,
1058 };
1059
1060 static struct video_device vivi_template = {
1061 .name = "vivi",
1062 .type = VID_TYPE_CAPTURE,
1063 .fops = &vivi_fops,
1064 .minor = -1,
1065 .release = video_device_release,
1066
1067 .vidioc_querycap = vidioc_querycap,
1068 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1069 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1070 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1071 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1072 .vidioc_reqbufs = vidioc_reqbufs,
1073 .vidioc_querybuf = vidioc_querybuf,
1074 .vidioc_qbuf = vidioc_qbuf,
1075 .vidioc_dqbuf = vidioc_dqbuf,
1076 .vidioc_s_std = vidioc_s_std,
1077 .vidioc_enum_input = vidioc_enum_input,
1078 .vidioc_g_input = vidioc_g_input,
1079 .vidioc_s_input = vidioc_s_input,
1080 .vidioc_queryctrl = vidioc_queryctrl,
1081 .vidioc_g_ctrl = vidioc_g_ctrl,
1082 .vidioc_s_ctrl = vidioc_s_ctrl,
1083 .vidioc_streamon = vidioc_streamon,
1084 .vidioc_streamoff = vidioc_streamoff,
1085 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1086 .vidiocgmbuf = vidiocgmbuf,
1087 #endif
1088 .tvnorms = V4L2_STD_525_60,
1089 .current_norm = V4L2_STD_NTSC_M,
1090 };
1091 /* -----------------------------------------------------------------
1092 Initialization and module stuff
1093 ------------------------------------------------------------------*/
1094
1095 static int __init vivi_init(void)
1096 {
1097 int ret = -ENOMEM, i;
1098 struct vivi_dev *dev;
1099 struct video_device *vfd;
1100
1101 for (i = 0; i < n_devs; i++) {
1102 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1103 if (NULL == dev)
1104 break;
1105
1106 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1107
1108 /* init video dma queues */
1109 INIT_LIST_HEAD(&dev->vidq.active);
1110 init_waitqueue_head(&dev->vidq.wq);
1111
1112 /* initialize locks */
1113 spin_lock_init(&dev->slock);
1114 mutex_init(&dev->mutex);
1115
1116 vfd = video_device_alloc();
1117 if (NULL == vfd)
1118 break;
1119
1120 *vfd = vivi_template;
1121
1122 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1123 if (ret < 0)
1124 break;
1125
1126 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1127 vivi_template.name, vfd->minor);
1128
1129 if (video_nr >= 0)
1130 video_nr++;
1131
1132 dev->vfd = vfd;
1133 }
1134
1135 if (ret < 0) {
1136 vivi_release();
1137 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1138 } else
1139 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1140 "Capture Board successfully loaded.\n");
1141 return ret;
1142 }
1143
1144 static void __exit vivi_exit(void)
1145 {
1146 vivi_release();
1147 }
1148
1149 module_init(vivi_init);
1150 module_exit(vivi_exit);
1151
1152 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1153 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1154 MODULE_LICENSE("Dual BSD/GPL");
1155
1156 module_param(video_nr, int, 0);
1157 MODULE_PARM_DESC(video_nr, "video iminor start number");
1158
1159 module_param(n_devs, int, 0);
1160 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1161
1162 module_param_named(debug, vivi_template.debug, int, 0444);
1163 MODULE_PARM_DESC(debug, "activates debug info");
1164
1165 module_param(vid_limit, int, 0644);
1166 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
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