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;
169 /* various device info */
170 struct video_device *vfd;
172 struct vivi_dmaqueue vidq;
174 /* Several counters */
175 int h, m, s, us, jiffies;
178 int mv_count; /* Controls bars movement */
182 struct vivi_dev *dev;
185 struct vivi_fmt *fmt;
186 unsigned int width, height;
187 struct videobuf_queue vb_vidq;
189 enum v4l2_buf_type type;
192 /* ------------------------------------------------------------------
193 DMA and thread functions
194 ------------------------------------------------------------------*/
196 /* Bars and Colors should match positions */
209 static u8 bars[8][3] = {
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 */
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)
230 #define TSTAMP_MIN_Y 24
231 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
232 #define TSTAMP_MIN_X 64
234 static void gen_line(char *basep, int inipos, int wmax,
235 int hmax, int line, int count, char *timestr)
240 u8 chr, r, g, b, color;
242 /* We will just duplicate the second pixel at the packet */
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];
252 for (color = 0; color < 4; color++) {
258 *p = TO_Y(r, g, b); /* Luma */
261 *p = TO_U(r, g, b); /* Cb */
264 *p = TO_V(r, g, b); /* Cr */
271 /* Checks if it is possible to show timestamp */
272 if (TSTAMP_MAX_Y >= hmax)
274 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
277 /* Print stream time */
278 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
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)) {
289 /* Background color */
295 pos = inipos + j * 2;
296 for (color = 0; color < 4; color++) {
304 *p = TO_Y(r, g, b); /* Luma */
307 *p = TO_U(r, g, b); /* Cb */
310 *p = TO_V(r, g, b); /* Cr */
323 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
326 int hmax = buf->vb.height;
327 int wmax = buf->vb.width;
329 char *tmpbuf = kmalloc(wmax * 2, GFP_KERNEL);
330 void *vbuf = videobuf_to_vmalloc(&buf->vb);
335 for (h = 0; h < hmax; h++) {
336 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
338 /* FIXME: replacing to __copy_to_user */
339 if (copy_to_user(vbuf + pos, tmpbuf, wmax * 2) != 0)
340 dprintk(dev, 2, "vivifill copy_to_user failed.\n");
348 /* Updates stream time */
350 dev->us += jiffies_to_usecs(jiffies-dev->jiffies);
351 dev->jiffies = jiffies;
352 if (dev->us >= 1000000) {
366 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
367 dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
369 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
370 dev->timestr, (unsigned long)tmpbuf, pos);
372 /* Advice that buffer was filled */
373 buf->vb.state = VIDEOBUF_DONE;
374 buf->vb.field_count++;
375 do_gettimeofday(&ts);
378 list_del(&buf->vb.queue);
379 wake_up(&buf->vb.done);
382 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
384 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
386 struct vivi_buffer *buf;
387 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
391 /* Announces videobuf that all went ok */
392 for (bc = 0;; bc++) {
393 if (list_empty(&dma_q->active)) {
394 dprintk(dev, 1, "No active queue to serve\n");
398 buf = list_entry(dma_q->active.next,
399 struct vivi_buffer, vb.queue);
401 /* Nobody is waiting something to be done, just return */
402 if (!waitqueue_active(&buf->vb.done)) {
403 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
407 do_gettimeofday(&buf->vb.ts);
408 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
411 vivi_fillbuff(dev, buf);
413 if (list_empty(&dma_q->active)) {
414 del_timer(&dma_q->timeout);
416 mod_timer(&dma_q->timeout, jiffies + BUFFER_TIMEOUT);
420 dprintk(dev, 1, "%s: %d buffers handled (should be 1)\n",
424 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
426 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
428 DECLARE_WAITQUEUE(wait, current);
430 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
431 (unsigned long)dma_q);
433 add_wait_queue(&dma_q->wq, &wait);
434 if (!kthread_should_stop()) {
437 /* Calculate time to wake up */
438 timeout = dma_q->ini_jiffies+
439 msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR * 1000)
440 / WAKE_DENOMINATOR) - jiffies;
443 int old = dma_q->frame;
444 dma_q->frame = (jiffies_to_msecs(jiffies -
445 dma_q->ini_jiffies) *
447 (WAKE_NUMERATOR * 1000) + 1;
449 timeout = dma_q->ini_jiffies+
450 msecs_to_jiffies((dma_q->frame *
451 WAKE_NUMERATOR * 1000)
452 / WAKE_DENOMINATOR) - jiffies;
454 dprintk(dev, 1, "underrun, losed %d frames. "
455 "Now, frame is %d. Waking on %d jiffies\n",
456 dma_q->frame-old, dma_q->frame, timeout);
458 dprintk(dev, 1, "will sleep for %i jiffies\n",
461 vivi_thread_tick(dma_q);
463 schedule_timeout_interruptible(timeout);
466 remove_wait_queue(&dma_q->wq, &wait);
470 static int vivi_thread(void *data)
472 struct vivi_dmaqueue *dma_q = data;
473 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
475 dprintk(dev, 1, "thread started\n");
477 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
483 if (kthread_should_stop())
486 dprintk(dev, 1, "thread: exit\n");
490 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
492 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
495 dma_q->ini_jiffies = jiffies;
497 dprintk(dev, 1, "%s\n", __FUNCTION__);
499 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
501 if (IS_ERR(dma_q->kthread)) {
502 printk(KERN_ERR "vivi: kernel_thread() failed\n");
503 return PTR_ERR(dma_q->kthread);
506 wake_up_interruptible(&dma_q->wq);
508 dprintk(dev, 1, "returning from %s\n", __FUNCTION__);
512 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
514 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
516 dprintk(dev, 1, "%s\n", __FUNCTION__);
517 /* shutdown control thread */
518 if (dma_q->kthread) {
519 kthread_stop(dma_q->kthread);
520 dma_q->kthread = NULL;
524 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
526 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
527 struct vivi_buffer *buf, *prev;
529 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __FUNCTION__,
530 (unsigned long)dma_q);
532 if (!list_empty(&dma_q->active)) {
533 buf = list_entry(dma_q->active.next,
534 struct vivi_buffer, vb.queue);
535 dprintk(dev, 2, "restart_queue [%p/%d]: restart dma\n",
538 dprintk(dev, 1, "Restarting video dma\n");
539 vivi_stop_thread(dma_q);
541 /* cancel all outstanding capture / vbi requests */
542 list_for_each_entry_safe(buf, prev, &dma_q->active, vb.queue) {
543 list_del(&buf->vb.queue);
544 buf->vb.state = VIDEOBUF_ERROR;
545 wake_up(&buf->vb.done);
547 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
554 if (list_empty(&dma_q->queued))
556 buf = list_entry(dma_q->queued.next,
557 struct vivi_buffer, vb.queue);
559 list_del(&buf->vb.queue);
560 list_add_tail(&buf->vb.queue, &dma_q->active);
562 dprintk(dev, 1, "Restarting video dma\n");
563 vivi_stop_thread(dma_q);
564 vivi_start_thread(dma_q);
566 buf->vb.state = VIDEOBUF_ACTIVE;
567 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
569 "[%p/%d] restart_queue - first active\n",
572 } else if (prev->vb.width == buf->vb.width &&
573 prev->vb.height == buf->vb.height &&
574 prev->fmt == buf->fmt) {
575 list_del(&buf->vb.queue);
576 list_add_tail(&buf->vb.queue, &dma_q->active);
577 buf->vb.state = VIDEOBUF_ACTIVE;
579 "[%p/%d] restart_queue - move to active\n",
588 static void vivi_vid_timeout(unsigned long data)
590 struct vivi_dev *dev = (struct vivi_dev *)data;
591 struct vivi_dmaqueue *vidq = &dev->vidq;
592 struct vivi_buffer *buf;
594 while (!list_empty(&vidq->active)) {
595 buf = list_entry(vidq->active.next,
596 struct vivi_buffer, vb.queue);
597 list_del(&buf->vb.queue);
598 buf->vb.state = VIDEOBUF_ERROR;
599 wake_up(&buf->vb.done);
600 printk(KERN_INFO "vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
603 restart_video_queue(vidq);
606 /* ------------------------------------------------------------------
608 ------------------------------------------------------------------*/
610 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
612 struct vivi_fh *fh = vq->priv_data;
613 struct vivi_dev *dev = fh->dev;
615 *size = fh->width*fh->height*2;
620 while (*size * *count > vid_limit * 1024 * 1024)
623 dprintk(dev, 1, "%s, count=%d, size=%d\n", __FUNCTION__,
629 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
631 struct vivi_fh *fh = vq->priv_data;
632 struct vivi_dev *dev = fh->dev;
634 dprintk(dev, 1, "%s\n", __FUNCTION__);
639 videobuf_waiton(&buf->vb, 0, 0);
640 videobuf_vmalloc_free(&buf->vb);
641 buf->vb.state = VIDEOBUF_NEEDS_INIT;
644 #define norm_maxw() 1024
645 #define norm_maxh() 768
647 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
648 enum v4l2_field field)
650 struct vivi_fh *fh = vq->priv_data;
651 struct vivi_dev *dev = fh->dev;
652 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
653 int rc, init_buffer = 0;
655 dprintk(dev, 1, "%s, field=%d\n", __FUNCTION__, field);
657 BUG_ON(NULL == fh->fmt);
658 if (fh->width < 48 || fh->width > norm_maxw() ||
659 fh->height < 32 || fh->height > norm_maxh())
661 buf->vb.size = fh->width*fh->height*2;
662 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
665 if (buf->fmt != fh->fmt ||
666 buf->vb.width != fh->width ||
667 buf->vb.height != fh->height ||
668 buf->vb.field != field) {
670 buf->vb.width = fh->width;
671 buf->vb.height = fh->height;
672 buf->vb.field = field;
676 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
677 rc = videobuf_iolock(vq, &buf->vb, NULL);
682 buf->vb.state = VIDEOBUF_PREPARED;
687 free_buffer(vq, buf);
692 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
694 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
695 struct vivi_fh *fh = vq->priv_data;
696 struct vivi_dev *dev = fh->dev;
697 struct vivi_dmaqueue *vidq = &dev->vidq;
698 struct vivi_buffer *prev;
700 if (!list_empty(&vidq->queued)) {
701 dprintk(dev, 1, "adding vb queue=0x%08lx\n",
702 (unsigned long)&buf->vb.queue);
703 list_add_tail(&buf->vb.queue, &vidq->queued);
704 buf->vb.state = VIDEOBUF_QUEUED;
705 dprintk(dev, 2, "[%p/%d] buffer_queue - append to queued\n",
707 } else if (list_empty(&vidq->active)) {
708 list_add_tail(&buf->vb.queue, &vidq->active);
710 buf->vb.state = VIDEOBUF_ACTIVE;
711 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
712 dprintk(dev, 2, "[%p/%d] buffer_queue - first active\n",
715 vivi_start_thread(vidq);
717 prev = list_entry(vidq->active.prev,
718 struct vivi_buffer, vb.queue);
719 if (prev->vb.width == buf->vb.width &&
720 prev->vb.height == buf->vb.height &&
721 prev->fmt == buf->fmt) {
722 list_add_tail(&buf->vb.queue, &vidq->active);
723 buf->vb.state = VIDEOBUF_ACTIVE;
725 "[%p/%d] buffer_queue - append to active\n",
729 list_add_tail(&buf->vb.queue, &vidq->queued);
730 buf->vb.state = VIDEOBUF_QUEUED;
732 "[%p/%d] buffer_queue - first queued\n",
738 static void buffer_release(struct videobuf_queue *vq,
739 struct videobuf_buffer *vb)
741 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
742 struct vivi_fh *fh = vq->priv_data;
743 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
744 struct vivi_dmaqueue *vidq = &dev->vidq;
746 dprintk(dev, 1, "%s\n", __FUNCTION__);
748 vivi_stop_thread(vidq);
750 free_buffer(vq, buf);
753 static struct videobuf_queue_ops vivi_video_qops = {
754 .buf_setup = buffer_setup,
755 .buf_prepare = buffer_prepare,
756 .buf_queue = buffer_queue,
757 .buf_release = buffer_release,
760 /* ------------------------------------------------------------------
761 IOCTL vidioc handling
762 ------------------------------------------------------------------*/
763 static int vidioc_querycap(struct file *file, void *priv,
764 struct v4l2_capability *cap)
766 strcpy(cap->driver, "vivi");
767 strcpy(cap->card, "vivi");
768 cap->version = VIVI_VERSION;
769 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
775 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
776 struct v4l2_fmtdesc *f)
781 strlcpy(f->description, format.name, sizeof(f->description));
782 f->pixelformat = format.fourcc;
786 static int vidioc_g_fmt_cap(struct file *file, void *priv,
787 struct v4l2_format *f)
789 struct vivi_fh *fh = priv;
791 f->fmt.pix.width = fh->width;
792 f->fmt.pix.height = fh->height;
793 f->fmt.pix.field = fh->vb_vidq.field;
794 f->fmt.pix.pixelformat = fh->fmt->fourcc;
795 f->fmt.pix.bytesperline =
796 (f->fmt.pix.width * fh->fmt->depth) >> 3;
797 f->fmt.pix.sizeimage =
798 f->fmt.pix.height * f->fmt.pix.bytesperline;
803 static int vidioc_try_fmt_cap(struct file *file, void *priv,
804 struct v4l2_format *f)
806 struct vivi_fh *fh = priv;
807 struct vivi_dev *dev = fh->dev;
808 struct vivi_fmt *fmt;
809 enum v4l2_field field;
810 unsigned int maxw, maxh;
812 if (format.fourcc != f->fmt.pix.pixelformat) {
813 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
814 "Driver accepts only 0x%08x\n",
815 f->fmt.pix.pixelformat, format.fourcc);
820 field = f->fmt.pix.field;
822 if (field == V4L2_FIELD_ANY) {
823 field = V4L2_FIELD_INTERLACED;
824 } else if (V4L2_FIELD_INTERLACED != field) {
825 dprintk(dev, 1, "Field type invalid.\n");
832 f->fmt.pix.field = field;
833 if (f->fmt.pix.height < 32)
834 f->fmt.pix.height = 32;
835 if (f->fmt.pix.height > maxh)
836 f->fmt.pix.height = maxh;
837 if (f->fmt.pix.width < 48)
838 f->fmt.pix.width = 48;
839 if (f->fmt.pix.width > maxw)
840 f->fmt.pix.width = maxw;
841 f->fmt.pix.width &= ~0x03;
842 f->fmt.pix.bytesperline =
843 (f->fmt.pix.width * fmt->depth) >> 3;
844 f->fmt.pix.sizeimage =
845 f->fmt.pix.height * f->fmt.pix.bytesperline;
850 /*FIXME: This seems to be generic enough to be at videodev2 */
851 static int vidioc_s_fmt_cap(struct file *file, void *priv,
852 struct v4l2_format *f)
854 struct vivi_fh *fh = priv;
855 int ret = vidioc_try_fmt_cap(file, fh, f);
860 fh->width = f->fmt.pix.width;
861 fh->height = f->fmt.pix.height;
862 fh->vb_vidq.field = f->fmt.pix.field;
868 static int vidioc_reqbufs(struct file *file, void *priv,
869 struct v4l2_requestbuffers *p)
871 struct vivi_fh *fh = priv;
873 return (videobuf_reqbufs(&fh->vb_vidq, p));
876 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
878 struct vivi_fh *fh = priv;
880 return (videobuf_querybuf(&fh->vb_vidq, p));
883 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
885 struct vivi_fh *fh = priv;
887 return (videobuf_qbuf(&fh->vb_vidq, p));
890 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
892 struct vivi_fh *fh = priv;
894 return (videobuf_dqbuf(&fh->vb_vidq, p,
895 file->f_flags & O_NONBLOCK));
898 #ifdef CONFIG_VIDEO_V4L1_COMPAT
899 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
901 struct vivi_fh *fh = priv;
903 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
907 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
909 struct vivi_fh *fh = priv;
911 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
916 return videobuf_streamon(&fh->vb_vidq);
919 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
921 struct vivi_fh *fh = priv;
923 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
928 return videobuf_streamoff(&fh->vb_vidq);
931 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
936 /* only one input in this sample driver */
937 static int vidioc_enum_input(struct file *file, void *priv,
938 struct v4l2_input *inp)
943 inp->type = V4L2_INPUT_TYPE_CAMERA;
944 inp->std = V4L2_STD_525_60;
945 strcpy(inp->name, "Camera");
950 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
956 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
964 /* --- controls ---------------------------------------------- */
965 static int vidioc_queryctrl(struct file *file, void *priv,
966 struct v4l2_queryctrl *qc)
970 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
971 if (qc->id && qc->id == vivi_qctrl[i].id) {
972 memcpy(qc, &(vivi_qctrl[i]),
980 static int vidioc_g_ctrl(struct file *file, void *priv,
981 struct v4l2_control *ctrl)
985 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
986 if (ctrl->id == vivi_qctrl[i].id) {
987 ctrl->value = qctl_regs[i];
993 static int vidioc_s_ctrl(struct file *file, void *priv,
994 struct v4l2_control *ctrl)
998 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
999 if (ctrl->id == vivi_qctrl[i].id) {
1000 if (ctrl->value < vivi_qctrl[i].minimum
1001 || ctrl->value > vivi_qctrl[i].maximum) {
1004 qctl_regs[i] = ctrl->value;
1010 /* ------------------------------------------------------------------
1011 File operations for the device
1012 ------------------------------------------------------------------*/
1014 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1016 static int vivi_open(struct inode *inode, struct file *file)
1018 int minor = iminor(inode);
1019 struct vivi_dev *dev;
1023 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
1025 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
1026 if (dev->vfd->minor == minor)
1031 /* If more than one user, mutex should be added */
1034 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
1035 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1037 /* allocate + initialize per filehandle data */
1038 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1044 file->private_data = fh;
1047 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1052 /* Put all controls at a sane state */
1053 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1054 qctl_regs[i] = vivi_qctrl[i].default_value;
1056 /* Resets frame counters */
1062 dev->jiffies = jiffies;
1063 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
1064 dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
1066 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1067 NULL, NULL, fh->type, V4L2_FIELD_INTERLACED,
1068 sizeof(struct vivi_buffer), fh);
1074 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1076 struct vivi_fh *fh = file->private_data;
1078 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1079 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1080 file->f_flags & O_NONBLOCK);
1086 vivi_poll(struct file *file, struct poll_table_struct *wait)
1088 struct vivi_fh *fh = file->private_data;
1089 struct vivi_dev *dev = fh->dev;
1090 struct videobuf_queue *q = &fh->vb_vidq;
1092 dprintk(dev, 1, "%s\n", __FUNCTION__);
1094 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1097 return videobuf_poll_stream(file, q, wait);
1100 static int vivi_close(struct inode *inode, struct file *file)
1102 struct vivi_fh *fh = file->private_data;
1103 struct vivi_dev *dev = fh->dev;
1104 struct vivi_dmaqueue *vidq = &dev->vidq;
1106 int minor = iminor(inode);
1108 vivi_stop_thread(vidq);
1109 videobuf_stop(&fh->vb_vidq);
1110 videobuf_mmap_free(&fh->vb_vidq);
1116 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1122 static int vivi_release(void)
1124 struct vivi_dev *dev;
1125 struct list_head *list;
1127 while (!list_empty(&vivi_devlist)) {
1128 list = vivi_devlist.next;
1130 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1132 if (-1 != dev->vfd->minor)
1133 video_unregister_device(dev->vfd);
1135 video_device_release(dev->vfd);
1143 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1145 struct vivi_fh *fh = file->private_data;
1146 struct vivi_dev *dev = fh->dev;
1149 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1151 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1153 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1154 (unsigned long)vma->vm_start,
1155 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1161 static const struct file_operations vivi_fops = {
1162 .owner = THIS_MODULE,
1164 .release = vivi_close,
1167 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1169 .llseek = no_llseek,
1172 static struct video_device vivi_template = {
1174 .type = VID_TYPE_CAPTURE,
1177 .release = video_device_release,
1179 .vidioc_querycap = vidioc_querycap,
1180 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1181 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1182 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1183 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1184 .vidioc_reqbufs = vidioc_reqbufs,
1185 .vidioc_querybuf = vidioc_querybuf,
1186 .vidioc_qbuf = vidioc_qbuf,
1187 .vidioc_dqbuf = vidioc_dqbuf,
1188 .vidioc_s_std = vidioc_s_std,
1189 .vidioc_enum_input = vidioc_enum_input,
1190 .vidioc_g_input = vidioc_g_input,
1191 .vidioc_s_input = vidioc_s_input,
1192 .vidioc_queryctrl = vidioc_queryctrl,
1193 .vidioc_g_ctrl = vidioc_g_ctrl,
1194 .vidioc_s_ctrl = vidioc_s_ctrl,
1195 .vidioc_streamon = vidioc_streamon,
1196 .vidioc_streamoff = vidioc_streamoff,
1197 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1198 .vidiocgmbuf = vidiocgmbuf,
1200 .tvnorms = V4L2_STD_525_60,
1201 .current_norm = V4L2_STD_NTSC_M,
1203 /* -----------------------------------------------------------------
1204 Initialization and module stuff
1205 ------------------------------------------------------------------*/
1207 static int __init vivi_init(void)
1209 int ret = -ENOMEM, i;
1210 struct vivi_dev *dev;
1211 struct video_device *vfd;
1213 for (i = 0; i < n_devs; i++) {
1214 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1218 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1220 /* init video dma queues */
1221 INIT_LIST_HEAD(&dev->vidq.active);
1222 INIT_LIST_HEAD(&dev->vidq.queued);
1223 init_waitqueue_head(&dev->vidq.wq);
1225 /* initialize locks */
1226 mutex_init(&dev->lock);
1228 dev->vidq.timeout.function = vivi_vid_timeout;
1229 dev->vidq.timeout.data = (unsigned long)dev;
1230 init_timer(&dev->vidq.timeout);
1232 vfd = video_device_alloc();
1236 *vfd = vivi_template;
1238 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1242 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1243 vivi_template.name, vfd->minor);
1253 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1255 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1256 "Capture Board successfully loaded.\n");
1260 static void __exit vivi_exit(void)
1265 module_init(vivi_init);
1266 module_exit(vivi_exit);
1268 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1269 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1270 MODULE_LICENSE("Dual BSD/GPL");
1272 module_param(video_nr, int, 0);
1273 MODULE_PARM_DESC(video_nr, "video iminor start number");
1275 module_param(n_devs, int, 0);
1276 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1278 module_param_named(debug, vivi_template.debug, int, 0444);
1279 MODULE_PARM_DESC(debug, "activates debug info");
1281 module_param(vid_limit, int, 0644);
1282 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");