2 * Virtual Video driver - This code emulates a real video device with v4l2 api
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/
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
15 #include <linux/module.h>
16 #include <linux/delay.h>
17 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.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>
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>
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 */
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)
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 */
60 /* supported controls */
61 static struct v4l2_queryctrl vivi_qctrl[] = {
63 .id = V4L2_CID_AUDIO_VOLUME,
68 .default_value = 65535,
70 .type = V4L2_CTRL_TYPE_INTEGER,
72 .id = V4L2_CID_BRIGHTNESS,
73 .type = V4L2_CTRL_TYPE_INTEGER,
81 .id = V4L2_CID_CONTRAST,
82 .type = V4L2_CTRL_TYPE_INTEGER,
87 .default_value = 0x10,
90 .id = V4L2_CID_SATURATION,
91 .type = V4L2_CTRL_TYPE_INTEGER,
100 .type = V4L2_CTRL_TYPE_INTEGER,
110 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
112 #define dprintk(dev, level, fmt, arg...) \
114 if (dev->vfd->debug >= (level)) \
115 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
118 /* ------------------------------------------------------------------
120 ------------------------------------------------------------------*/
124 u32 fourcc; /* v4l2 format id */
128 static struct vivi_fmt format = {
129 .name = "4:2:2, packed, YUYV",
130 .fourcc = V4L2_PIX_FMT_YUYV,
136 struct scatterlist *sg;
139 /* buffer for one video frame */
141 /* common v4l buffer stuff -- must be first */
142 struct videobuf_buffer vb;
144 struct vivi_fmt *fmt;
147 struct vivi_dmaqueue {
148 struct list_head active;
149 struct list_head queued;
150 struct timer_list timeout;
152 /* thread for generating video stream*/
153 struct task_struct *kthread;
154 wait_queue_head_t wq;
155 /* Counters to control fps rate */
160 static LIST_HEAD(vivi_devlist);
163 struct list_head vivi_devlist;
170 /* various device info */
171 struct video_device *vfd;
173 struct vivi_dmaqueue vidq;
175 /* Several counters */
176 int h, m, s, us, jiffies;
179 int mv_count; /* Controls bars movement */
183 struct vivi_dev *dev;
186 struct vivi_fmt *fmt;
187 unsigned int width, height;
188 struct videobuf_queue vb_vidq;
190 enum v4l2_buf_type type;
193 /* ------------------------------------------------------------------
194 DMA and thread functions
195 ------------------------------------------------------------------*/
197 /* Bars and Colors should match positions */
210 static u8 bars[8][3] = {
212 {204, 204, 204}, /* white */
213 {208, 208, 0}, /* ambar */
214 { 0, 206, 206}, /* cyan */
215 { 0, 239, 0}, /* green */
216 {239, 0, 239}, /* magenta */
217 {205, 0, 0}, /* red */
218 { 0, 0, 255}, /* blue */
219 { 0, 0, 0}, /* black */
222 #define TO_Y(r, g, b) \
223 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
224 /* RGB to V(Cr) Color transform */
225 #define TO_V(r, g, b) \
226 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
227 /* RGB to U(Cb) Color transform */
228 #define TO_U(r, g, b) \
229 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
231 #define TSTAMP_MIN_Y 24
232 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
233 #define TSTAMP_MIN_X 64
235 static void gen_line(char *basep, int inipos, int wmax,
236 int hmax, int line, int count, char *timestr)
241 u8 chr, r, g, b, color;
243 /* We will just duplicate the second pixel at the packet */
246 /* Generate a standard color bar pattern */
247 for (w = 0; w < wmax; w++) {
248 int colorpos = ((w + count) * 8/(wmax + 1)) % 8;
249 r = bars[colorpos][0];
250 g = bars[colorpos][1];
251 b = bars[colorpos][2];
253 for (color = 0; color < 4; color++) {
259 *p = TO_Y(r, g, b); /* Luma */
262 *p = TO_U(r, g, b); /* Cb */
265 *p = TO_V(r, g, b); /* Cr */
272 /* Checks if it is possible to show timestamp */
273 if (TSTAMP_MAX_Y >= hmax)
275 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
278 /* Print stream time */
279 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
281 for (s = timestr; *s; s++) {
282 chr = rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
283 for (i = 0; i < 7; i++) {
284 if (chr & 1 << (7 - i)) {
290 /* Background color */
296 pos = inipos + j * 2;
297 for (color = 0; color < 4; color++) {
305 *p = TO_Y(r, g, b); /* Luma */
308 *p = TO_U(r, g, b); /* Cb */
311 *p = TO_V(r, g, b); /* Cr */
324 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
327 int hmax = buf->vb.height;
328 int wmax = buf->vb.width;
330 char *tmpbuf = kmalloc(wmax * 2, GFP_KERNEL);
331 void *vbuf = videobuf_to_vmalloc(&buf->vb);
336 for (h = 0; h < hmax; h++) {
337 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
339 /* FIXME: replacing to __copy_to_user */
340 if (copy_to_user(vbuf + pos, tmpbuf, wmax * 2) != 0)
341 dprintk(dev, 2, "vivifill copy_to_user failed.\n");
349 /* Updates stream time */
351 dev->us += jiffies_to_usecs(jiffies-dev->jiffies);
352 dev->jiffies = jiffies;
353 if (dev->us >= 1000000) {
367 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
368 dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
370 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
371 dev->timestr, (unsigned long)tmpbuf, pos);
373 /* Advice that buffer was filled */
374 buf->vb.state = VIDEOBUF_DONE;
375 buf->vb.field_count++;
376 do_gettimeofday(&ts);
379 list_del(&buf->vb.queue);
380 wake_up(&buf->vb.done);
383 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
385 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
387 struct vivi_buffer *buf;
388 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
392 spin_lock(&dev->slock);
393 /* Announces videobuf that all went ok */
394 for (bc = 0;; bc++) {
395 if (list_empty(&dma_q->active)) {
396 dprintk(dev, 1, "No active queue to serve\n");
400 buf = list_entry(dma_q->active.next,
401 struct vivi_buffer, vb.queue);
403 /* Nobody is waiting something to be done, just return */
404 if (!waitqueue_active(&buf->vb.done)) {
405 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
406 spin_unlock(&dev->slock);
410 do_gettimeofday(&buf->vb.ts);
411 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
414 vivi_fillbuff(dev, buf);
416 if (list_empty(&dma_q->active)) {
417 del_timer(&dma_q->timeout);
419 mod_timer(&dma_q->timeout, jiffies + BUFFER_TIMEOUT);
423 dprintk(dev, 1, "%s: %d buffers handled (should be 1)\n",
425 spin_unlock(&dev->slock);
428 #define frames_to_ms(frames) \
429 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
431 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
433 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
434 int timeout, running_time;
435 DECLARE_WAITQUEUE(wait, current);
437 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
438 (unsigned long)dma_q);
440 add_wait_queue(&dma_q->wq, &wait);
441 if (kthread_should_stop())
444 running_time = jiffies - dma_q->ini_jiffies;
447 /* Calculate time to wake up */
448 timeout = msecs_to_jiffies(frames_to_ms(dma_q->frame)) - running_time;
450 if (timeout > msecs_to_jiffies(frames_to_ms(2)) || timeout <= 0) {
451 int old = dma_q->frame;
454 dma_q->frame = (jiffies_to_msecs(running_time) /
455 frames_to_ms(1)) + 1;
457 timeout = msecs_to_jiffies(frames_to_ms(dma_q->frame))
460 if (unlikely (timeout <= 0))
463 nframes = (dma_q->frame > old)?
464 dma_q->frame - old : old - dma_q->frame;
466 dprintk(dev, 1, "%ld: %s %d frames. "
467 "Current frame is %d. Will sleep for %d jiffies\n",
469 (dma_q->frame > old)? "Underrun, losed" : "Overrun of",
470 nframes, dma_q->frame, timeout);
472 dprintk(dev, 1, "will sleep for %d jiffies\n", timeout);
474 vivi_thread_tick(dma_q);
476 schedule_timeout_interruptible(timeout);
479 remove_wait_queue(&dma_q->wq, &wait);
483 static int vivi_thread(void *data)
485 struct vivi_dmaqueue *dma_q = data;
486 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
488 dprintk(dev, 1, "thread started\n");
490 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
496 if (kthread_should_stop())
499 dprintk(dev, 1, "thread: exit\n");
503 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
505 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
508 dma_q->ini_jiffies = jiffies;
510 dprintk(dev, 1, "%s\n", __FUNCTION__);
512 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
514 if (IS_ERR(dma_q->kthread)) {
515 printk(KERN_ERR "vivi: kernel_thread() failed\n");
516 return PTR_ERR(dma_q->kthread);
519 wake_up_interruptible(&dma_q->wq);
521 dprintk(dev, 1, "returning from %s\n", __FUNCTION__);
525 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
527 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
529 dprintk(dev, 1, "%s\n", __FUNCTION__);
530 /* shutdown control thread */
531 if (dma_q->kthread) {
532 kthread_stop(dma_q->kthread);
533 dma_q->kthread = NULL;
537 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
539 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
540 struct vivi_buffer *buf, *prev;
542 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
543 (unsigned long)dma_q);
545 if (!list_empty(&dma_q->active)) {
546 buf = list_entry(dma_q->active.next,
547 struct vivi_buffer, vb.queue);
548 dprintk(dev, 2, "restart_queue [%p/%d]: restart dma\n",
551 dprintk(dev, 1, "Restarting video dma\n");
552 vivi_stop_thread(dma_q);
554 /* cancel all outstanding capture / vbi requests */
555 list_for_each_entry_safe(buf, prev, &dma_q->active, vb.queue) {
556 list_del(&buf->vb.queue);
557 buf->vb.state = VIDEOBUF_ERROR;
558 wake_up(&buf->vb.done);
560 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
567 if (list_empty(&dma_q->queued))
569 buf = list_entry(dma_q->queued.next,
570 struct vivi_buffer, vb.queue);
572 list_del(&buf->vb.queue);
573 list_add_tail(&buf->vb.queue, &dma_q->active);
575 dprintk(dev, 1, "Restarting video dma\n");
576 vivi_stop_thread(dma_q);
577 vivi_start_thread(dma_q);
579 buf->vb.state = VIDEOBUF_ACTIVE;
580 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
582 "[%p/%d] restart_queue - first active\n",
585 } else if (prev->vb.width == buf->vb.width &&
586 prev->vb.height == buf->vb.height &&
587 prev->fmt == buf->fmt) {
588 list_del(&buf->vb.queue);
589 list_add_tail(&buf->vb.queue, &dma_q->active);
590 buf->vb.state = VIDEOBUF_ACTIVE;
592 "[%p/%d] restart_queue - move to active\n",
601 static void vivi_vid_timeout(unsigned long data)
603 struct vivi_dev *dev = (struct vivi_dev *)data;
604 struct vivi_dmaqueue *vidq = &dev->vidq;
605 struct vivi_buffer *buf;
607 spin_lock(&dev->slock);
609 while (!list_empty(&vidq->active)) {
610 buf = list_entry(vidq->active.next,
611 struct vivi_buffer, vb.queue);
612 list_del(&buf->vb.queue);
613 buf->vb.state = VIDEOBUF_ERROR;
614 wake_up(&buf->vb.done);
615 printk(KERN_INFO "vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
617 restart_video_queue(vidq);
619 spin_unlock(&dev->slock);
622 /* ------------------------------------------------------------------
624 ------------------------------------------------------------------*/
626 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
628 struct vivi_fh *fh = vq->priv_data;
629 struct vivi_dev *dev = fh->dev;
631 *size = fh->width*fh->height*2;
636 while (*size * *count > vid_limit * 1024 * 1024)
639 dprintk(dev, 1, "%s, count=%d, size=%d\n", __FUNCTION__,
645 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
647 struct vivi_fh *fh = vq->priv_data;
648 struct vivi_dev *dev = fh->dev;
650 dprintk(dev, 1, "%s\n", __FUNCTION__);
655 videobuf_waiton(&buf->vb, 0, 0);
656 videobuf_vmalloc_free(&buf->vb);
657 buf->vb.state = VIDEOBUF_NEEDS_INIT;
660 #define norm_maxw() 1024
661 #define norm_maxh() 768
663 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
664 enum v4l2_field field)
666 struct vivi_fh *fh = vq->priv_data;
667 struct vivi_dev *dev = fh->dev;
668 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
669 int rc, init_buffer = 0;
671 dprintk(dev, 1, "%s, field=%d\n", __FUNCTION__, field);
673 BUG_ON(NULL == fh->fmt);
674 if (fh->width < 48 || fh->width > norm_maxw() ||
675 fh->height < 32 || fh->height > norm_maxh())
677 buf->vb.size = fh->width*fh->height*2;
678 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
681 if (buf->fmt != fh->fmt ||
682 buf->vb.width != fh->width ||
683 buf->vb.height != fh->height ||
684 buf->vb.field != field) {
686 buf->vb.width = fh->width;
687 buf->vb.height = fh->height;
688 buf->vb.field = field;
692 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
693 rc = videobuf_iolock(vq, &buf->vb, NULL);
698 buf->vb.state = VIDEOBUF_PREPARED;
703 free_buffer(vq, buf);
708 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
710 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
711 struct vivi_fh *fh = vq->priv_data;
712 struct vivi_dev *dev = fh->dev;
713 struct vivi_dmaqueue *vidq = &dev->vidq;
714 struct vivi_buffer *prev;
716 if (!list_empty(&vidq->queued)) {
717 dprintk(dev, 1, "adding vb queue=0x%08lx\n",
718 (unsigned long)&buf->vb.queue);
719 list_add_tail(&buf->vb.queue, &vidq->queued);
720 buf->vb.state = VIDEOBUF_QUEUED;
721 dprintk(dev, 2, "[%p/%d] buffer_queue - append to queued\n",
723 } else if (list_empty(&vidq->active)) {
724 list_add_tail(&buf->vb.queue, &vidq->active);
726 buf->vb.state = VIDEOBUF_ACTIVE;
727 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
728 dprintk(dev, 2, "[%p/%d] buffer_queue - first active\n",
731 vivi_start_thread(vidq);
733 prev = list_entry(vidq->active.prev,
734 struct vivi_buffer, vb.queue);
735 if (prev->vb.width == buf->vb.width &&
736 prev->vb.height == buf->vb.height &&
737 prev->fmt == buf->fmt) {
738 list_add_tail(&buf->vb.queue, &vidq->active);
739 buf->vb.state = VIDEOBUF_ACTIVE;
741 "[%p/%d] buffer_queue - append to active\n",
745 list_add_tail(&buf->vb.queue, &vidq->queued);
746 buf->vb.state = VIDEOBUF_QUEUED;
748 "[%p/%d] buffer_queue - first queued\n",
754 static void buffer_release(struct videobuf_queue *vq,
755 struct videobuf_buffer *vb)
757 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
758 struct vivi_fh *fh = vq->priv_data;
759 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
760 struct vivi_dmaqueue *vidq = &dev->vidq;
762 dprintk(dev, 1, "%s\n", __FUNCTION__);
764 vivi_stop_thread(vidq);
766 free_buffer(vq, buf);
769 static struct videobuf_queue_ops vivi_video_qops = {
770 .buf_setup = buffer_setup,
771 .buf_prepare = buffer_prepare,
772 .buf_queue = buffer_queue,
773 .buf_release = buffer_release,
776 /* ------------------------------------------------------------------
777 IOCTL vidioc handling
778 ------------------------------------------------------------------*/
779 static int vidioc_querycap(struct file *file, void *priv,
780 struct v4l2_capability *cap)
782 strcpy(cap->driver, "vivi");
783 strcpy(cap->card, "vivi");
784 cap->version = VIVI_VERSION;
785 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
791 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
792 struct v4l2_fmtdesc *f)
797 strlcpy(f->description, format.name, sizeof(f->description));
798 f->pixelformat = format.fourcc;
802 static int vidioc_g_fmt_cap(struct file *file, void *priv,
803 struct v4l2_format *f)
805 struct vivi_fh *fh = priv;
807 f->fmt.pix.width = fh->width;
808 f->fmt.pix.height = fh->height;
809 f->fmt.pix.field = fh->vb_vidq.field;
810 f->fmt.pix.pixelformat = fh->fmt->fourcc;
811 f->fmt.pix.bytesperline =
812 (f->fmt.pix.width * fh->fmt->depth) >> 3;
813 f->fmt.pix.sizeimage =
814 f->fmt.pix.height * f->fmt.pix.bytesperline;
819 static int vidioc_try_fmt_cap(struct file *file, void *priv,
820 struct v4l2_format *f)
822 struct vivi_fh *fh = priv;
823 struct vivi_dev *dev = fh->dev;
824 struct vivi_fmt *fmt;
825 enum v4l2_field field;
826 unsigned int maxw, maxh;
828 if (format.fourcc != f->fmt.pix.pixelformat) {
829 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
830 "Driver accepts only 0x%08x\n",
831 f->fmt.pix.pixelformat, format.fourcc);
836 field = f->fmt.pix.field;
838 if (field == V4L2_FIELD_ANY) {
839 field = V4L2_FIELD_INTERLACED;
840 } else if (V4L2_FIELD_INTERLACED != field) {
841 dprintk(dev, 1, "Field type invalid.\n");
848 f->fmt.pix.field = field;
849 if (f->fmt.pix.height < 32)
850 f->fmt.pix.height = 32;
851 if (f->fmt.pix.height > maxh)
852 f->fmt.pix.height = maxh;
853 if (f->fmt.pix.width < 48)
854 f->fmt.pix.width = 48;
855 if (f->fmt.pix.width > maxw)
856 f->fmt.pix.width = maxw;
857 f->fmt.pix.width &= ~0x03;
858 f->fmt.pix.bytesperline =
859 (f->fmt.pix.width * fmt->depth) >> 3;
860 f->fmt.pix.sizeimage =
861 f->fmt.pix.height * f->fmt.pix.bytesperline;
866 /*FIXME: This seems to be generic enough to be at videodev2 */
867 static int vidioc_s_fmt_cap(struct file *file, void *priv,
868 struct v4l2_format *f)
870 struct vivi_fh *fh = priv;
871 int ret = vidioc_try_fmt_cap(file, fh, f);
876 fh->width = f->fmt.pix.width;
877 fh->height = f->fmt.pix.height;
878 fh->vb_vidq.field = f->fmt.pix.field;
884 static int vidioc_reqbufs(struct file *file, void *priv,
885 struct v4l2_requestbuffers *p)
887 struct vivi_fh *fh = priv;
889 return (videobuf_reqbufs(&fh->vb_vidq, p));
892 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
894 struct vivi_fh *fh = priv;
896 return (videobuf_querybuf(&fh->vb_vidq, p));
899 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
901 struct vivi_fh *fh = priv;
903 return (videobuf_qbuf(&fh->vb_vidq, p));
906 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
908 struct vivi_fh *fh = priv;
910 return (videobuf_dqbuf(&fh->vb_vidq, p,
911 file->f_flags & O_NONBLOCK));
914 #ifdef CONFIG_VIDEO_V4L1_COMPAT
915 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
917 struct vivi_fh *fh = priv;
919 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
923 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
925 struct vivi_fh *fh = priv;
927 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
932 return videobuf_streamon(&fh->vb_vidq);
935 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
937 struct vivi_fh *fh = priv;
939 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
944 return videobuf_streamoff(&fh->vb_vidq);
947 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
952 /* only one input in this sample driver */
953 static int vidioc_enum_input(struct file *file, void *priv,
954 struct v4l2_input *inp)
959 inp->type = V4L2_INPUT_TYPE_CAMERA;
960 inp->std = V4L2_STD_525_60;
961 strcpy(inp->name, "Camera");
966 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
972 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
980 /* --- controls ---------------------------------------------- */
981 static int vidioc_queryctrl(struct file *file, void *priv,
982 struct v4l2_queryctrl *qc)
986 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
987 if (qc->id && qc->id == vivi_qctrl[i].id) {
988 memcpy(qc, &(vivi_qctrl[i]),
996 static int vidioc_g_ctrl(struct file *file, void *priv,
997 struct v4l2_control *ctrl)
1001 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1002 if (ctrl->id == vivi_qctrl[i].id) {
1003 ctrl->value = qctl_regs[i];
1009 static int vidioc_s_ctrl(struct file *file, void *priv,
1010 struct v4l2_control *ctrl)
1014 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1015 if (ctrl->id == vivi_qctrl[i].id) {
1016 if (ctrl->value < vivi_qctrl[i].minimum
1017 || ctrl->value > vivi_qctrl[i].maximum) {
1020 qctl_regs[i] = ctrl->value;
1026 /* ------------------------------------------------------------------
1027 File operations for the device
1028 ------------------------------------------------------------------*/
1030 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1032 static int vivi_open(struct inode *inode, struct file *file)
1034 int minor = iminor(inode);
1035 struct vivi_dev *dev;
1039 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
1041 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
1042 if (dev->vfd->minor == minor)
1047 /* If more than one user, mutex should be added */
1050 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
1051 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1053 /* allocate + initialize per filehandle data */
1054 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1060 file->private_data = fh;
1063 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1068 /* Put all controls at a sane state */
1069 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1070 qctl_regs[i] = vivi_qctrl[i].default_value;
1072 /* Resets frame counters */
1078 dev->jiffies = jiffies;
1079 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
1080 dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
1082 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1083 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1084 sizeof(struct vivi_buffer), fh);
1090 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1092 struct vivi_fh *fh = file->private_data;
1094 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1095 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1096 file->f_flags & O_NONBLOCK);
1102 vivi_poll(struct file *file, struct poll_table_struct *wait)
1104 struct vivi_fh *fh = file->private_data;
1105 struct vivi_dev *dev = fh->dev;
1106 struct videobuf_queue *q = &fh->vb_vidq;
1108 dprintk(dev, 1, "%s\n", __FUNCTION__);
1110 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1113 return videobuf_poll_stream(file, q, wait);
1116 static int vivi_close(struct inode *inode, struct file *file)
1118 struct vivi_fh *fh = file->private_data;
1119 struct vivi_dev *dev = fh->dev;
1120 struct vivi_dmaqueue *vidq = &dev->vidq;
1122 int minor = iminor(inode);
1124 vivi_stop_thread(vidq);
1125 videobuf_stop(&fh->vb_vidq);
1126 videobuf_mmap_free(&fh->vb_vidq);
1132 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1138 static int vivi_release(void)
1140 struct vivi_dev *dev;
1141 struct list_head *list;
1143 while (!list_empty(&vivi_devlist)) {
1144 list = vivi_devlist.next;
1146 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1148 if (-1 != dev->vfd->minor)
1149 video_unregister_device(dev->vfd);
1151 video_device_release(dev->vfd);
1159 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1161 struct vivi_fh *fh = file->private_data;
1162 struct vivi_dev *dev = fh->dev;
1165 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1167 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1169 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1170 (unsigned long)vma->vm_start,
1171 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1177 static const struct file_operations vivi_fops = {
1178 .owner = THIS_MODULE,
1180 .release = vivi_close,
1183 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1185 .llseek = no_llseek,
1188 static struct video_device vivi_template = {
1190 .type = VID_TYPE_CAPTURE,
1193 .release = video_device_release,
1195 .vidioc_querycap = vidioc_querycap,
1196 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1197 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1198 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1199 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1200 .vidioc_reqbufs = vidioc_reqbufs,
1201 .vidioc_querybuf = vidioc_querybuf,
1202 .vidioc_qbuf = vidioc_qbuf,
1203 .vidioc_dqbuf = vidioc_dqbuf,
1204 .vidioc_s_std = vidioc_s_std,
1205 .vidioc_enum_input = vidioc_enum_input,
1206 .vidioc_g_input = vidioc_g_input,
1207 .vidioc_s_input = vidioc_s_input,
1208 .vidioc_queryctrl = vidioc_queryctrl,
1209 .vidioc_g_ctrl = vidioc_g_ctrl,
1210 .vidioc_s_ctrl = vidioc_s_ctrl,
1211 .vidioc_streamon = vidioc_streamon,
1212 .vidioc_streamoff = vidioc_streamoff,
1213 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1214 .vidiocgmbuf = vidiocgmbuf,
1216 .tvnorms = V4L2_STD_525_60,
1217 .current_norm = V4L2_STD_NTSC_M,
1219 /* -----------------------------------------------------------------
1220 Initialization and module stuff
1221 ------------------------------------------------------------------*/
1223 static int __init vivi_init(void)
1225 int ret = -ENOMEM, i;
1226 struct vivi_dev *dev;
1227 struct video_device *vfd;
1229 for (i = 0; i < n_devs; i++) {
1230 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1234 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1236 /* init video dma queues */
1237 INIT_LIST_HEAD(&dev->vidq.active);
1238 INIT_LIST_HEAD(&dev->vidq.queued);
1239 init_waitqueue_head(&dev->vidq.wq);
1241 /* initialize locks */
1242 mutex_init(&dev->lock);
1243 spin_lock_init(&dev->slock);
1245 dev->vidq.timeout.function = vivi_vid_timeout;
1246 dev->vidq.timeout.data = (unsigned long)dev;
1247 init_timer(&dev->vidq.timeout);
1249 vfd = video_device_alloc();
1253 *vfd = vivi_template;
1255 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1259 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1260 vivi_template.name, vfd->minor);
1270 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1272 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1273 "Capture Board successfully loaded.\n");
1277 static void __exit vivi_exit(void)
1282 module_init(vivi_init);
1283 module_exit(vivi_exit);
1285 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1286 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1287 MODULE_LICENSE("Dual BSD/GPL");
1289 module_param(video_nr, int, 0);
1290 MODULE_PARM_DESC(video_nr, "video iminor start number");
1292 module_param(n_devs, int, 0);
1293 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1295 module_param_named(debug, vivi_template.debug, int, 0444);
1296 MODULE_PARM_DESC(debug, "activates debug info");
1298 module_param(vid_limit, int, 0644);
1299 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");