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;
150 /* thread for generating video stream*/
151 struct task_struct *kthread;
152 wait_queue_head_t wq;
153 /* Counters to control fps rate */
158 static LIST_HEAD(vivi_devlist);
161 struct list_head vivi_devlist;
168 /* various device info */
169 struct video_device *vfd;
171 struct vivi_dmaqueue vidq;
173 /* Several counters */
175 unsigned long 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 */
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;
331 void *vbuf = videobuf_to_vmalloc(&buf->vb);
336 tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
340 for (h = 0; h < hmax; h++) {
341 gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
343 memcpy(vbuf + pos, tmpbuf, wmax * 2);
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.field_count++;
377 do_gettimeofday(&ts);
379 buf->vb.state = VIDEOBUF_DONE;
382 static void vivi_thread_tick(struct vivi_fh *fh)
384 struct vivi_buffer *buf;
385 struct vivi_dev *dev = fh->dev;
386 struct vivi_dmaqueue *dma_q = &dev->vidq;
388 unsigned long flags = 0;
390 dprintk(dev, 1, "Thread tick\n");
392 spin_lock_irqsave(&dev->slock, flags);
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 on this buffer, return */
402 if (!waitqueue_active(&buf->vb.done))
405 list_del(&buf->vb.queue);
407 do_gettimeofday(&buf->vb.ts);
410 vivi_fillbuff(dev, buf);
411 dprintk(dev, 1, "filled buffer %p\n", buf);
413 wake_up(&buf->vb.done);
414 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
416 spin_unlock_irqrestore(&dev->slock, flags);
420 #define frames_to_ms(frames) \
421 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
423 static void vivi_sleep(struct vivi_fh *fh)
425 struct vivi_dev *dev = fh->dev;
426 struct vivi_dmaqueue *dma_q = &dev->vidq;
428 DECLARE_WAITQUEUE(wait, current);
430 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
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 = msecs_to_jiffies(frames_to_ms(1));
440 vivi_thread_tick(fh);
442 schedule_timeout_interruptible(timeout);
445 remove_wait_queue(&dma_q->wq, &wait);
449 static int vivi_thread(void *data)
451 struct vivi_fh *fh = data;
452 struct vivi_dev *dev = fh->dev;
454 dprintk(dev, 1, "thread started\n");
461 if (kthread_should_stop())
464 dprintk(dev, 1, "thread: exit\n");
468 static int vivi_start_thread(struct vivi_fh *fh)
470 struct vivi_dev *dev = fh->dev;
471 struct vivi_dmaqueue *dma_q = &dev->vidq;
474 dma_q->ini_jiffies = jiffies;
476 dprintk(dev, 1, "%s\n", __func__);
478 dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
480 if (IS_ERR(dma_q->kthread)) {
481 printk(KERN_ERR "vivi: kernel_thread() failed\n");
482 return PTR_ERR(dma_q->kthread);
485 wake_up_interruptible(&dma_q->wq);
487 dprintk(dev, 1, "returning from %s\n", __func__);
491 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
493 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
495 dprintk(dev, 1, "%s\n", __func__);
496 /* shutdown control thread */
497 if (dma_q->kthread) {
498 kthread_stop(dma_q->kthread);
499 dma_q->kthread = NULL;
503 /* ------------------------------------------------------------------
505 ------------------------------------------------------------------*/
507 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
509 struct vivi_fh *fh = vq->priv_data;
510 struct vivi_dev *dev = fh->dev;
512 *size = fh->width*fh->height*2;
517 while (*size * *count > vid_limit * 1024 * 1024)
520 dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
526 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
528 struct vivi_fh *fh = vq->priv_data;
529 struct vivi_dev *dev = fh->dev;
531 dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
536 videobuf_vmalloc_free(&buf->vb);
537 dprintk(dev, 1, "free_buffer: freed\n");
538 buf->vb.state = VIDEOBUF_NEEDS_INIT;
541 #define norm_maxw() 1024
542 #define norm_maxh() 768
544 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
545 enum v4l2_field field)
547 struct vivi_fh *fh = vq->priv_data;
548 struct vivi_dev *dev = fh->dev;
549 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
552 dprintk(dev, 1, "%s, field=%d\n", __func__, field);
554 BUG_ON(NULL == fh->fmt);
556 if (fh->width < 48 || fh->width > norm_maxw() ||
557 fh->height < 32 || fh->height > norm_maxh())
560 buf->vb.size = fh->width*fh->height*2;
561 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
564 /* These properties only change when queue is idle, see s_fmt */
566 buf->vb.width = fh->width;
567 buf->vb.height = fh->height;
568 buf->vb.field = field;
570 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
571 rc = videobuf_iolock(vq, &buf->vb, NULL);
576 buf->vb.state = VIDEOBUF_PREPARED;
581 free_buffer(vq, buf);
586 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
588 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
589 struct vivi_fh *fh = vq->priv_data;
590 struct vivi_dev *dev = fh->dev;
591 struct vivi_dmaqueue *vidq = &dev->vidq;
593 dprintk(dev, 1, "%s\n", __func__);
595 buf->vb.state = VIDEOBUF_QUEUED;
596 list_add_tail(&buf->vb.queue, &vidq->active);
599 static void buffer_release(struct videobuf_queue *vq,
600 struct videobuf_buffer *vb)
602 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
603 struct vivi_fh *fh = vq->priv_data;
604 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
606 dprintk(dev, 1, "%s\n", __func__);
608 free_buffer(vq, buf);
611 static struct videobuf_queue_ops vivi_video_qops = {
612 .buf_setup = buffer_setup,
613 .buf_prepare = buffer_prepare,
614 .buf_queue = buffer_queue,
615 .buf_release = buffer_release,
618 /* ------------------------------------------------------------------
619 IOCTL vidioc handling
620 ------------------------------------------------------------------*/
621 static int vidioc_querycap(struct file *file, void *priv,
622 struct v4l2_capability *cap)
624 strcpy(cap->driver, "vivi");
625 strcpy(cap->card, "vivi");
626 cap->version = VIVI_VERSION;
627 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
633 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
634 struct v4l2_fmtdesc *f)
639 strlcpy(f->description, format.name, sizeof(f->description));
640 f->pixelformat = format.fourcc;
644 static int vidioc_g_fmt_cap(struct file *file, void *priv,
645 struct v4l2_format *f)
647 struct vivi_fh *fh = priv;
649 f->fmt.pix.width = fh->width;
650 f->fmt.pix.height = fh->height;
651 f->fmt.pix.field = fh->vb_vidq.field;
652 f->fmt.pix.pixelformat = fh->fmt->fourcc;
653 f->fmt.pix.bytesperline =
654 (f->fmt.pix.width * fh->fmt->depth) >> 3;
655 f->fmt.pix.sizeimage =
656 f->fmt.pix.height * f->fmt.pix.bytesperline;
661 static int vidioc_try_fmt_cap(struct file *file, void *priv,
662 struct v4l2_format *f)
664 struct vivi_fh *fh = priv;
665 struct vivi_dev *dev = fh->dev;
666 struct vivi_fmt *fmt;
667 enum v4l2_field field;
668 unsigned int maxw, maxh;
670 if (format.fourcc != f->fmt.pix.pixelformat) {
671 dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
672 "Driver accepts only 0x%08x\n",
673 f->fmt.pix.pixelformat, format.fourcc);
678 field = f->fmt.pix.field;
680 if (field == V4L2_FIELD_ANY) {
681 field = V4L2_FIELD_INTERLACED;
682 } else if (V4L2_FIELD_INTERLACED != field) {
683 dprintk(dev, 1, "Field type invalid.\n");
690 f->fmt.pix.field = field;
691 if (f->fmt.pix.height < 32)
692 f->fmt.pix.height = 32;
693 if (f->fmt.pix.height > maxh)
694 f->fmt.pix.height = maxh;
695 if (f->fmt.pix.width < 48)
696 f->fmt.pix.width = 48;
697 if (f->fmt.pix.width > maxw)
698 f->fmt.pix.width = maxw;
699 f->fmt.pix.width &= ~0x03;
700 f->fmt.pix.bytesperline =
701 (f->fmt.pix.width * fmt->depth) >> 3;
702 f->fmt.pix.sizeimage =
703 f->fmt.pix.height * f->fmt.pix.bytesperline;
708 /*FIXME: This seems to be generic enough to be at videodev2 */
709 static int vidioc_s_fmt_cap(struct file *file, void *priv,
710 struct v4l2_format *f)
712 struct vivi_fh *fh = priv;
713 struct videobuf_queue *q = &fh->vb_vidq;
715 int ret = vidioc_try_fmt_cap(file, fh, f);
719 mutex_lock(&q->vb_lock);
721 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
722 dprintk(fh->dev, 1, "%s queue busy\n", __func__);
728 fh->width = f->fmt.pix.width;
729 fh->height = f->fmt.pix.height;
730 fh->vb_vidq.field = f->fmt.pix.field;
735 mutex_unlock(&q->vb_lock);
740 static int vidioc_reqbufs(struct file *file, void *priv,
741 struct v4l2_requestbuffers *p)
743 struct vivi_fh *fh = priv;
745 return (videobuf_reqbufs(&fh->vb_vidq, p));
748 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
750 struct vivi_fh *fh = priv;
752 return (videobuf_querybuf(&fh->vb_vidq, p));
755 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
757 struct vivi_fh *fh = priv;
759 return (videobuf_qbuf(&fh->vb_vidq, p));
762 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
764 struct vivi_fh *fh = priv;
766 return (videobuf_dqbuf(&fh->vb_vidq, p,
767 file->f_flags & O_NONBLOCK));
770 #ifdef CONFIG_VIDEO_V4L1_COMPAT
771 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
773 struct vivi_fh *fh = priv;
775 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
779 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
781 struct vivi_fh *fh = priv;
783 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
788 return videobuf_streamon(&fh->vb_vidq);
791 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
793 struct vivi_fh *fh = priv;
795 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
800 return videobuf_streamoff(&fh->vb_vidq);
803 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
808 /* only one input in this sample driver */
809 static int vidioc_enum_input(struct file *file, void *priv,
810 struct v4l2_input *inp)
815 inp->type = V4L2_INPUT_TYPE_CAMERA;
816 inp->std = V4L2_STD_525_60;
817 strcpy(inp->name, "Camera");
822 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
828 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
836 /* --- controls ---------------------------------------------- */
837 static int vidioc_queryctrl(struct file *file, void *priv,
838 struct v4l2_queryctrl *qc)
842 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
843 if (qc->id && qc->id == vivi_qctrl[i].id) {
844 memcpy(qc, &(vivi_qctrl[i]),
852 static int vidioc_g_ctrl(struct file *file, void *priv,
853 struct v4l2_control *ctrl)
857 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
858 if (ctrl->id == vivi_qctrl[i].id) {
859 ctrl->value = qctl_regs[i];
865 static int vidioc_s_ctrl(struct file *file, void *priv,
866 struct v4l2_control *ctrl)
870 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
871 if (ctrl->id == vivi_qctrl[i].id) {
872 if (ctrl->value < vivi_qctrl[i].minimum
873 || ctrl->value > vivi_qctrl[i].maximum) {
876 qctl_regs[i] = ctrl->value;
882 /* ------------------------------------------------------------------
883 File operations for the device
884 ------------------------------------------------------------------*/
886 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
888 static int vivi_open(struct inode *inode, struct file *file)
890 int minor = iminor(inode);
891 struct vivi_dev *dev;
892 struct vivi_fh *fh = NULL;
896 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
898 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
899 if (dev->vfd->minor == minor)
904 mutex_lock(&dev->mutex);
907 if (dev->users > 1) {
913 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
914 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
916 /* allocate + initialize per filehandle data */
917 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
924 mutex_unlock(&dev->mutex);
928 file->private_data = fh;
931 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
936 /* Put all controls at a sane state */
937 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
938 qctl_regs[i] = vivi_qctrl[i].default_value;
940 /* Resets frame counters */
946 dev->jiffies = jiffies;
947 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
948 dev->h, dev->m, dev->s, dev->ms);
950 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
951 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
952 sizeof(struct vivi_buffer), fh);
954 vivi_start_thread(fh);
960 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
962 struct vivi_fh *fh = file->private_data;
964 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
965 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
966 file->f_flags & O_NONBLOCK);
972 vivi_poll(struct file *file, struct poll_table_struct *wait)
974 struct vivi_fh *fh = file->private_data;
975 struct vivi_dev *dev = fh->dev;
976 struct videobuf_queue *q = &fh->vb_vidq;
978 dprintk(dev, 1, "%s\n", __func__);
980 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
983 return videobuf_poll_stream(file, q, wait);
986 static int vivi_close(struct inode *inode, struct file *file)
988 struct vivi_fh *fh = file->private_data;
989 struct vivi_dev *dev = fh->dev;
990 struct vivi_dmaqueue *vidq = &dev->vidq;
992 int minor = iminor(inode);
994 vivi_stop_thread(vidq);
995 videobuf_stop(&fh->vb_vidq);
996 videobuf_mmap_free(&fh->vb_vidq);
1000 mutex_lock(&dev->mutex);
1002 mutex_unlock(&dev->mutex);
1004 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1010 static int vivi_release(void)
1012 struct vivi_dev *dev;
1013 struct list_head *list;
1015 while (!list_empty(&vivi_devlist)) {
1016 list = vivi_devlist.next;
1018 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1020 if (-1 != dev->vfd->minor)
1021 video_unregister_device(dev->vfd);
1023 video_device_release(dev->vfd);
1031 static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1033 struct vivi_fh *fh = file->private_data;
1034 struct vivi_dev *dev = fh->dev;
1037 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1039 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1041 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1042 (unsigned long)vma->vm_start,
1043 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1049 static const struct file_operations vivi_fops = {
1050 .owner = THIS_MODULE,
1052 .release = vivi_close,
1055 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1056 .compat_ioctl = v4l_compat_ioctl32,
1058 .llseek = no_llseek,
1061 static struct video_device vivi_template = {
1063 .type = VID_TYPE_CAPTURE,
1066 .release = video_device_release,
1068 .vidioc_querycap = vidioc_querycap,
1069 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1070 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1071 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1072 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1073 .vidioc_reqbufs = vidioc_reqbufs,
1074 .vidioc_querybuf = vidioc_querybuf,
1075 .vidioc_qbuf = vidioc_qbuf,
1076 .vidioc_dqbuf = vidioc_dqbuf,
1077 .vidioc_s_std = vidioc_s_std,
1078 .vidioc_enum_input = vidioc_enum_input,
1079 .vidioc_g_input = vidioc_g_input,
1080 .vidioc_s_input = vidioc_s_input,
1081 .vidioc_queryctrl = vidioc_queryctrl,
1082 .vidioc_g_ctrl = vidioc_g_ctrl,
1083 .vidioc_s_ctrl = vidioc_s_ctrl,
1084 .vidioc_streamon = vidioc_streamon,
1085 .vidioc_streamoff = vidioc_streamoff,
1086 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1087 .vidiocgmbuf = vidiocgmbuf,
1089 .tvnorms = V4L2_STD_525_60,
1090 .current_norm = V4L2_STD_NTSC_M,
1092 /* -----------------------------------------------------------------
1093 Initialization and module stuff
1094 ------------------------------------------------------------------*/
1096 static int __init vivi_init(void)
1098 int ret = -ENOMEM, i;
1099 struct vivi_dev *dev;
1100 struct video_device *vfd;
1102 for (i = 0; i < n_devs; i++) {
1103 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1107 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1109 /* init video dma queues */
1110 INIT_LIST_HEAD(&dev->vidq.active);
1111 init_waitqueue_head(&dev->vidq.wq);
1113 /* initialize locks */
1114 spin_lock_init(&dev->slock);
1115 mutex_init(&dev->mutex);
1117 vfd = video_device_alloc();
1121 *vfd = vivi_template;
1123 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1127 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1128 vivi_template.name, vfd->minor);
1138 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1140 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1141 "Capture Board successfully loaded.\n");
1145 static void __exit vivi_exit(void)
1150 module_init(vivi_init);
1151 module_exit(vivi_exit);
1153 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1154 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1155 MODULE_LICENSE("Dual BSD/GPL");
1157 module_param(video_nr, int, 0);
1158 MODULE_PARM_DESC(video_nr, "video iminor start number");
1160 module_param(n_devs, int, 0);
1161 MODULE_PARM_DESC(n_devs, "number of video devices to create");
1163 module_param_named(debug, vivi_template.debug, int, 0444);
1164 MODULE_PARM_DESC(debug, "activates debug info");
1166 module_param(vid_limit, int, 0644);
1167 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");