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;
171 /* various device info */
172 struct video_device *vfd;
174 struct vivi_dmaqueue vidq;
176 /* Several counters */
178 unsigned long jiffies;
181 int mv_count; /* Controls bars movement */
185 struct vivi_dev *dev;
188 struct vivi_fmt *fmt;
189 unsigned int width, height;
190 struct videobuf_queue vb_vidq;
192 enum v4l2_buf_type type;
195 /* ------------------------------------------------------------------
196 DMA and thread functions
197 ------------------------------------------------------------------*/
199 /* Bars and Colors should match positions */
212 static u8 bars[8][3] = {
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 */
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)
233 #define TSTAMP_MIN_Y 24
234 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
235 #define TSTAMP_MIN_X 64
237 static void gen_line(char *basep, int inipos, int wmax,
238 int hmax, int line, int count, char *timestr)
243 u8 chr, r, g, b, color;
245 /* We will just duplicate the second pixel at the packet */
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];
255 for (color = 0; color < 4; color++) {
261 *p = TO_Y(r, g, b); /* Luma */
264 *p = TO_U(r, g, b); /* Cb */
267 *p = TO_V(r, g, b); /* Cr */
274 /* Checks if it is possible to show timestamp */
275 if (TSTAMP_MAX_Y >= hmax)
277 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
280 /* Print stream time */
281 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
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)) {
292 /* Background color */
298 pos = inipos + j * 2;
299 for (color = 0; color < 4; color++) {
307 *p = TO_Y(r, g, b); /* Luma */
310 *p = TO_U(r, g, b); /* Cb */
313 *p = TO_V(r, g, b); /* Cr */
326 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
329 int hmax = buf->vb.height;
330 int wmax = buf->vb.width;
332 char *tmpbuf = kmalloc(wmax * 2, GFP_KERNEL);
333 void *vbuf = videobuf_to_vmalloc(&buf->vb);
338 for (h = 0; h < hmax; h++) {
339 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
341 /* FIXME: replacing to __copy_to_user */
342 if (copy_to_user(vbuf + pos, tmpbuf, wmax * 2) != 0)
343 dprintk(dev, 2, "vivifill copy_to_user failed.\n");
351 /* Updates stream time */
353 dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
354 dev->jiffies = jiffies;
355 if (dev->ms >= 1000) {
369 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
370 dev->h, dev->m, dev->s, dev->ms);
372 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
373 dev->timestr, (unsigned long)tmpbuf, pos);
375 /* Advice that buffer was filled */
376 buf->vb.state = VIDEOBUF_DONE;
377 buf->vb.field_count++;
378 do_gettimeofday(&ts);
381 list_del(&buf->vb.queue);
382 wake_up(&buf->vb.done);
385 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
387 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
389 struct vivi_buffer *buf;
390 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
394 spin_lock(&dev->slock);
395 /* Announces videobuf that all went ok */
396 for (bc = 0;; bc++) {
397 if (list_empty(&dma_q->active)) {
398 dprintk(dev, 1, "No active queue to serve\n");
402 buf = list_entry(dma_q->active.next,
403 struct vivi_buffer, vb.queue);
405 /* Nobody is waiting something to be done, just return */
406 if (!waitqueue_active(&buf->vb.done)) {
407 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
408 spin_unlock(&dev->slock);
412 do_gettimeofday(&buf->vb.ts);
413 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
416 vivi_fillbuff(dev, buf);
418 if (list_empty(&dma_q->active)) {
419 del_timer(&dma_q->timeout);
421 mod_timer(&dma_q->timeout, jiffies + BUFFER_TIMEOUT);
425 dprintk(dev, 1, "%s: %d buffers handled (should be 1)\n",
427 spin_unlock(&dev->slock);
430 #define frames_to_ms(frames) \
431 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
433 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
435 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
436 int timeout, running_time;
437 DECLARE_WAITQUEUE(wait, current);
439 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
440 (unsigned long)dma_q);
442 add_wait_queue(&dma_q->wq, &wait);
443 if (kthread_should_stop())
446 running_time = jiffies - dma_q->ini_jiffies;
449 /* Calculate time to wake up */
450 timeout = msecs_to_jiffies(frames_to_ms(dma_q->frame)) - running_time;
452 if (timeout > msecs_to_jiffies(frames_to_ms(2)) || timeout <= 0) {
453 int old = dma_q->frame;
456 dma_q->frame = (jiffies_to_msecs(running_time) /
457 frames_to_ms(1)) + 1;
459 timeout = msecs_to_jiffies(frames_to_ms(dma_q->frame))
462 if (unlikely (timeout <= 0))
465 nframes = (dma_q->frame > old)?
466 dma_q->frame - old : old - dma_q->frame;
468 dprintk(dev, 1, "%ld: %s %d frames. "
469 "Current frame is %d. Will sleep for %d jiffies\n",
471 (dma_q->frame > old)? "Underrun, losed" : "Overrun of",
472 nframes, dma_q->frame, timeout);
474 dprintk(dev, 1, "will sleep for %d jiffies\n", timeout);
476 vivi_thread_tick(dma_q);
478 schedule_timeout_interruptible(timeout);
481 remove_wait_queue(&dma_q->wq, &wait);
485 static int vivi_thread(void *data)
487 struct vivi_dmaqueue *dma_q = data;
488 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
490 dprintk(dev, 1, "thread started\n");
492 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
498 if (kthread_should_stop())
501 dprintk(dev, 1, "thread: exit\n");
505 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
507 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
510 dma_q->ini_jiffies = jiffies;
512 dprintk(dev, 1, "%s\n", __FUNCTION__);
514 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
516 if (IS_ERR(dma_q->kthread)) {
517 printk(KERN_ERR "vivi: kernel_thread() failed\n");
518 return PTR_ERR(dma_q->kthread);
521 wake_up_interruptible(&dma_q->wq);
523 dprintk(dev, 1, "returning from %s\n", __FUNCTION__);
527 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
529 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
531 dprintk(dev, 1, "%s\n", __FUNCTION__);
532 /* shutdown control thread */
533 if (dma_q->kthread) {
534 kthread_stop(dma_q->kthread);
535 dma_q->kthread = NULL;
539 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
541 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
542 struct vivi_buffer *buf, *prev;
544 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
545 (unsigned long)dma_q);
547 if (!list_empty(&dma_q->active)) {
548 buf = list_entry(dma_q->active.next,
549 struct vivi_buffer, vb.queue);
550 dprintk(dev, 2, "restart_queue [%p/%d]: restart dma\n",
553 dprintk(dev, 1, "Restarting video dma\n");
554 vivi_stop_thread(dma_q);
556 /* cancel all outstanding capture / vbi requests */
557 list_for_each_entry_safe(buf, prev, &dma_q->active, vb.queue) {
558 list_del(&buf->vb.queue);
559 buf->vb.state = VIDEOBUF_ERROR;
560 wake_up(&buf->vb.done);
562 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
569 if (list_empty(&dma_q->queued))
571 buf = list_entry(dma_q->queued.next,
572 struct vivi_buffer, vb.queue);
574 list_del(&buf->vb.queue);
575 list_add_tail(&buf->vb.queue, &dma_q->active);
577 dprintk(dev, 1, "Restarting video dma\n");
578 vivi_stop_thread(dma_q);
579 vivi_start_thread(dma_q);
581 buf->vb.state = VIDEOBUF_ACTIVE;
582 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
584 "[%p/%d] restart_queue - first active\n",
587 } else if (prev->vb.width == buf->vb.width &&
588 prev->vb.height == buf->vb.height &&
589 prev->fmt == buf->fmt) {
590 list_del(&buf->vb.queue);
591 list_add_tail(&buf->vb.queue, &dma_q->active);
592 buf->vb.state = VIDEOBUF_ACTIVE;
594 "[%p/%d] restart_queue - move to active\n",
603 static void vivi_vid_timeout(unsigned long data)
605 struct vivi_dev *dev = (struct vivi_dev *)data;
606 struct vivi_dmaqueue *vidq = &dev->vidq;
607 struct vivi_buffer *buf;
609 spin_lock(&dev->slock);
611 while (!list_empty(&vidq->active)) {
612 buf = list_entry(vidq->active.next,
613 struct vivi_buffer, vb.queue);
614 list_del(&buf->vb.queue);
615 buf->vb.state = VIDEOBUF_ERROR;
616 wake_up(&buf->vb.done);
617 printk(KERN_INFO "vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
619 restart_video_queue(vidq);
621 spin_unlock(&dev->slock);
624 /* ------------------------------------------------------------------
626 ------------------------------------------------------------------*/
628 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
630 struct vivi_fh *fh = vq->priv_data;
631 struct vivi_dev *dev = fh->dev;
633 *size = fh->width*fh->height*2;
638 while (*size * *count > vid_limit * 1024 * 1024)
641 dprintk(dev, 1, "%s, count=%d, size=%d\n", __FUNCTION__,
647 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
649 struct vivi_fh *fh = vq->priv_data;
650 struct vivi_dev *dev = fh->dev;
652 dprintk(dev, 1, "%s\n", __FUNCTION__);
657 videobuf_waiton(&buf->vb, 0, 0);
658 videobuf_vmalloc_free(&buf->vb);
659 buf->vb.state = VIDEOBUF_NEEDS_INIT;
662 #define norm_maxw() 1024
663 #define norm_maxh() 768
665 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
666 enum v4l2_field field)
668 struct vivi_fh *fh = vq->priv_data;
669 struct vivi_dev *dev = fh->dev;
670 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
671 int rc, init_buffer = 0;
673 dprintk(dev, 1, "%s, field=%d\n", __FUNCTION__, field);
675 BUG_ON(NULL == fh->fmt);
676 if (fh->width < 48 || fh->width > norm_maxw() ||
677 fh->height < 32 || fh->height > norm_maxh())
679 buf->vb.size = fh->width*fh->height*2;
680 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
683 if (buf->fmt != fh->fmt ||
684 buf->vb.width != fh->width ||
685 buf->vb.height != fh->height ||
686 buf->vb.field != field) {
688 buf->vb.width = fh->width;
689 buf->vb.height = fh->height;
690 buf->vb.field = field;
694 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
695 rc = videobuf_iolock(vq, &buf->vb, NULL);
700 buf->vb.state = VIDEOBUF_PREPARED;
705 free_buffer(vq, buf);
710 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
712 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
713 struct vivi_fh *fh = vq->priv_data;
714 struct vivi_dev *dev = fh->dev;
715 struct vivi_dmaqueue *vidq = &dev->vidq;
716 struct vivi_buffer *prev;
718 if (!list_empty(&vidq->queued)) {
719 dprintk(dev, 1, "adding vb queue=0x%08lx\n",
720 (unsigned long)&buf->vb.queue);
721 list_add_tail(&buf->vb.queue, &vidq->queued);
722 buf->vb.state = VIDEOBUF_QUEUED;
723 dprintk(dev, 2, "[%p/%d] buffer_queue - append to queued\n",
725 } else if (list_empty(&vidq->active)) {
726 list_add_tail(&buf->vb.queue, &vidq->active);
728 buf->vb.state = VIDEOBUF_ACTIVE;
729 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
730 dprintk(dev, 2, "[%p/%d] buffer_queue - first active\n",
733 vivi_start_thread(vidq);
735 prev = list_entry(vidq->active.prev,
736 struct vivi_buffer, vb.queue);
737 if (prev->vb.width == buf->vb.width &&
738 prev->vb.height == buf->vb.height &&
739 prev->fmt == buf->fmt) {
740 list_add_tail(&buf->vb.queue, &vidq->active);
741 buf->vb.state = VIDEOBUF_ACTIVE;
743 "[%p/%d] buffer_queue - append to active\n",
747 list_add_tail(&buf->vb.queue, &vidq->queued);
748 buf->vb.state = VIDEOBUF_QUEUED;
750 "[%p/%d] buffer_queue - first queued\n",
756 static void buffer_release(struct videobuf_queue *vq,
757 struct videobuf_buffer *vb)
759 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
760 struct vivi_fh *fh = vq->priv_data;
761 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
762 struct vivi_dmaqueue *vidq = &dev->vidq;
764 dprintk(dev, 1, "%s\n", __FUNCTION__);
766 vivi_stop_thread(vidq);
768 free_buffer(vq, buf);
771 static struct videobuf_queue_ops vivi_video_qops = {
772 .buf_setup = buffer_setup,
773 .buf_prepare = buffer_prepare,
774 .buf_queue = buffer_queue,
775 .buf_release = buffer_release,
778 /* ------------------------------------------------------------------
779 IOCTL vidioc handling
780 ------------------------------------------------------------------*/
781 static int vidioc_querycap(struct file *file, void *priv,
782 struct v4l2_capability *cap)
784 strcpy(cap->driver, "vivi");
785 strcpy(cap->card, "vivi");
786 cap->version = VIVI_VERSION;
787 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
793 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
794 struct v4l2_fmtdesc *f)
799 strlcpy(f->description, format.name, sizeof(f->description));
800 f->pixelformat = format.fourcc;
804 static int vidioc_g_fmt_cap(struct file *file, void *priv,
805 struct v4l2_format *f)
807 struct vivi_fh *fh = priv;
809 f->fmt.pix.width = fh->width;
810 f->fmt.pix.height = fh->height;
811 f->fmt.pix.field = fh->vb_vidq.field;
812 f->fmt.pix.pixelformat = fh->fmt->fourcc;
813 f->fmt.pix.bytesperline =
814 (f->fmt.pix.width * fh->fmt->depth) >> 3;
815 f->fmt.pix.sizeimage =
816 f->fmt.pix.height * f->fmt.pix.bytesperline;
821 static int vidioc_try_fmt_cap(struct file *file, void *priv,
822 struct v4l2_format *f)
824 struct vivi_fh *fh = priv;
825 struct vivi_dev *dev = fh->dev;
826 struct vivi_fmt *fmt;
827 enum v4l2_field field;
828 unsigned int maxw, maxh;
830 if (format.fourcc != f->fmt.pix.pixelformat) {
831 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
832 "Driver accepts only 0x%08x\n",
833 f->fmt.pix.pixelformat, format.fourcc);
838 field = f->fmt.pix.field;
840 if (field == V4L2_FIELD_ANY) {
841 field = V4L2_FIELD_INTERLACED;
842 } else if (V4L2_FIELD_INTERLACED != field) {
843 dprintk(dev, 1, "Field type invalid.\n");
850 f->fmt.pix.field = field;
851 if (f->fmt.pix.height < 32)
852 f->fmt.pix.height = 32;
853 if (f->fmt.pix.height > maxh)
854 f->fmt.pix.height = maxh;
855 if (f->fmt.pix.width < 48)
856 f->fmt.pix.width = 48;
857 if (f->fmt.pix.width > maxw)
858 f->fmt.pix.width = maxw;
859 f->fmt.pix.width &= ~0x03;
860 f->fmt.pix.bytesperline =
861 (f->fmt.pix.width * fmt->depth) >> 3;
862 f->fmt.pix.sizeimage =
863 f->fmt.pix.height * f->fmt.pix.bytesperline;
868 /*FIXME: This seems to be generic enough to be at videodev2 */
869 static int vidioc_s_fmt_cap(struct file *file, void *priv,
870 struct v4l2_format *f)
872 struct vivi_fh *fh = priv;
873 int ret = vidioc_try_fmt_cap(file, fh, f);
878 fh->width = f->fmt.pix.width;
879 fh->height = f->fmt.pix.height;
880 fh->vb_vidq.field = f->fmt.pix.field;
886 static int vidioc_reqbufs(struct file *file, void *priv,
887 struct v4l2_requestbuffers *p)
889 struct vivi_fh *fh = priv;
891 return (videobuf_reqbufs(&fh->vb_vidq, p));
894 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
896 struct vivi_fh *fh = priv;
898 return (videobuf_querybuf(&fh->vb_vidq, p));
901 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
903 struct vivi_fh *fh = priv;
905 return (videobuf_qbuf(&fh->vb_vidq, p));
908 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
910 struct vivi_fh *fh = priv;
912 return (videobuf_dqbuf(&fh->vb_vidq, p,
913 file->f_flags & O_NONBLOCK));
916 #ifdef CONFIG_VIDEO_V4L1_COMPAT
917 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
919 struct vivi_fh *fh = priv;
921 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
925 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
927 struct vivi_fh *fh = priv;
929 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
934 return videobuf_streamon(&fh->vb_vidq);
937 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
939 struct vivi_fh *fh = priv;
941 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
946 return videobuf_streamoff(&fh->vb_vidq);
949 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
954 /* only one input in this sample driver */
955 static int vidioc_enum_input(struct file *file, void *priv,
956 struct v4l2_input *inp)
961 inp->type = V4L2_INPUT_TYPE_CAMERA;
962 inp->std = V4L2_STD_525_60;
963 strcpy(inp->name, "Camera");
968 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
974 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
982 /* --- controls ---------------------------------------------- */
983 static int vidioc_queryctrl(struct file *file, void *priv,
984 struct v4l2_queryctrl *qc)
988 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
989 if (qc->id && qc->id == vivi_qctrl[i].id) {
990 memcpy(qc, &(vivi_qctrl[i]),
998 static int vidioc_g_ctrl(struct file *file, void *priv,
999 struct v4l2_control *ctrl)
1003 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1004 if (ctrl->id == vivi_qctrl[i].id) {
1005 ctrl->value = qctl_regs[i];
1011 static int vidioc_s_ctrl(struct file *file, void *priv,
1012 struct v4l2_control *ctrl)
1016 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1017 if (ctrl->id == vivi_qctrl[i].id) {
1018 if (ctrl->value < vivi_qctrl[i].minimum
1019 || ctrl->value > vivi_qctrl[i].maximum) {
1022 qctl_regs[i] = ctrl->value;
1028 /* ------------------------------------------------------------------
1029 File operations for the device
1030 ------------------------------------------------------------------*/
1032 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1034 static int vivi_open(struct inode *inode, struct file *file)
1036 int minor = iminor(inode);
1037 struct vivi_dev *dev;
1042 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
1044 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
1045 if (dev->vfd->minor == minor)
1050 mutex_lock(&dev->mutex);
1053 if (dev->users > 1) {
1059 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
1060 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1062 /* allocate + initialize per filehandle data */
1063 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1070 mutex_unlock(&dev->mutex);
1074 file->private_data = fh;
1077 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1082 /* Put all controls at a sane state */
1083 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1084 qctl_regs[i] = vivi_qctrl[i].default_value;
1086 /* Resets frame counters */
1092 dev->jiffies = jiffies;
1093 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
1094 dev->h, dev->m, dev->s, dev->ms);
1096 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1097 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1098 sizeof(struct vivi_buffer), fh);
1104 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1106 struct vivi_fh *fh = file->private_data;
1108 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1109 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1110 file->f_flags & O_NONBLOCK);
1116 vivi_poll(struct file *file, struct poll_table_struct *wait)
1118 struct vivi_fh *fh = file->private_data;
1119 struct vivi_dev *dev = fh->dev;
1120 struct videobuf_queue *q = &fh->vb_vidq;
1122 dprintk(dev, 1, "%s\n", __FUNCTION__);
1124 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1127 return videobuf_poll_stream(file, q, wait);
1130 static int vivi_close(struct inode *inode, struct file *file)
1132 struct vivi_fh *fh = file->private_data;
1133 struct vivi_dev *dev = fh->dev;
1134 struct vivi_dmaqueue *vidq = &dev->vidq;
1136 int minor = iminor(inode);
1138 vivi_stop_thread(vidq);
1139 videobuf_stop(&fh->vb_vidq);
1140 videobuf_mmap_free(&fh->vb_vidq);
1144 mutex_lock(&dev->mutex);
1146 mutex_unlock(&dev->mutex);
1148 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1154 static int vivi_release(void)
1156 struct vivi_dev *dev;
1157 struct list_head *list;
1159 while (!list_empty(&vivi_devlist)) {
1160 list = vivi_devlist.next;
1162 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1164 if (-1 != dev->vfd->minor)
1165 video_unregister_device(dev->vfd);
1167 video_device_release(dev->vfd);
1175 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1177 struct vivi_fh *fh = file->private_data;
1178 struct vivi_dev *dev = fh->dev;
1181 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1183 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1185 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1186 (unsigned long)vma->vm_start,
1187 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1193 static const struct file_operations vivi_fops = {
1194 .owner = THIS_MODULE,
1196 .release = vivi_close,
1199 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1200 .compat_ioctl = v4l_compat_ioctl32,
1202 .llseek = no_llseek,
1205 static struct video_device vivi_template = {
1207 .type = VID_TYPE_CAPTURE,
1210 .release = video_device_release,
1212 .vidioc_querycap = vidioc_querycap,
1213 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1214 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1215 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1216 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1217 .vidioc_reqbufs = vidioc_reqbufs,
1218 .vidioc_querybuf = vidioc_querybuf,
1219 .vidioc_qbuf = vidioc_qbuf,
1220 .vidioc_dqbuf = vidioc_dqbuf,
1221 .vidioc_s_std = vidioc_s_std,
1222 .vidioc_enum_input = vidioc_enum_input,
1223 .vidioc_g_input = vidioc_g_input,
1224 .vidioc_s_input = vidioc_s_input,
1225 .vidioc_queryctrl = vidioc_queryctrl,
1226 .vidioc_g_ctrl = vidioc_g_ctrl,
1227 .vidioc_s_ctrl = vidioc_s_ctrl,
1228 .vidioc_streamon = vidioc_streamon,
1229 .vidioc_streamoff = vidioc_streamoff,
1230 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1231 .vidiocgmbuf = vidiocgmbuf,
1233 .tvnorms = V4L2_STD_525_60,
1234 .current_norm = V4L2_STD_NTSC_M,
1236 /* -----------------------------------------------------------------
1237 Initialization and module stuff
1238 ------------------------------------------------------------------*/
1240 static int __init vivi_init(void)
1242 int ret = -ENOMEM, i;
1243 struct vivi_dev *dev;
1244 struct video_device *vfd;
1246 for (i = 0; i < n_devs; i++) {
1247 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1251 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1253 /* init video dma queues */
1254 INIT_LIST_HEAD(&dev->vidq.active);
1255 INIT_LIST_HEAD(&dev->vidq.queued);
1256 init_waitqueue_head(&dev->vidq.wq);
1258 /* initialize locks */
1259 mutex_init(&dev->lock);
1260 spin_lock_init(&dev->slock);
1261 mutex_init(&dev->mutex);
1263 dev->vidq.timeout.function = vivi_vid_timeout;
1264 dev->vidq.timeout.data = (unsigned long)dev;
1265 init_timer(&dev->vidq.timeout);
1267 vfd = video_device_alloc();
1271 *vfd = vivi_template;
1273 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1277 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1278 vivi_template.name, vfd->minor);
1288 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1290 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1291 "Capture Board successfully loaded.\n");
1295 static void __exit vivi_exit(void)
1300 module_init(vivi_init);
1301 module_exit(vivi_exit);
1303 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1304 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1305 MODULE_LICENSE("Dual BSD/GPL");
1307 module_param(video_nr, int, 0);
1308 MODULE_PARM_DESC(video_nr, "video iminor start number");
1310 module_param(n_devs, int, 0);
1311 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1313 module_param_named(debug, vivi_template.debug, int, 0444);
1314 MODULE_PARM_DESC(debug, "activates debug info");
1316 module_param(vid_limit, int, 0644);
1317 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");