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/videodev2.h>
29 #include <linux/dma-mapping.h>
30 #ifdef CONFIG_VIDEO_V4L1_COMPAT
31 /* Include V4L1 specific functions. Should be removed soon */
32 #include <linux/videodev.h>
34 #include <linux/interrupt.h>
35 #include <media/video-buf.h>
36 #include <media/v4l2-common.h>
37 #include <linux/kthread.h>
38 #include <linux/highmem.h>
39 #include <linux/freezer.h>
41 /* Wake up at about 30 fps */
42 #define WAKE_NUMERATOR 30
43 #define WAKE_DENOMINATOR 1001
44 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46 /* These timers are for 1 fps - used only for testing */
47 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
48 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
52 #define VIVI_MAJOR_VERSION 0
53 #define VIVI_MINOR_VERSION 4
54 #define VIVI_RELEASE 0
55 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57 /* Declare static vars that will be used as parameters */
58 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
59 static struct video_device vivi; /* Video device */
60 static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
62 /* supported controls */
63 static struct v4l2_queryctrl vivi_qctrl[] = {
65 .id = V4L2_CID_AUDIO_VOLUME,
70 .default_value = 65535,
72 .type = V4L2_CTRL_TYPE_INTEGER,
74 .id = V4L2_CID_BRIGHTNESS,
75 .type = V4L2_CTRL_TYPE_INTEGER,
83 .id = V4L2_CID_CONTRAST,
84 .type = V4L2_CTRL_TYPE_INTEGER,
89 .default_value = 0x10,
92 .id = V4L2_CID_SATURATION,
93 .type = V4L2_CTRL_TYPE_INTEGER,
102 .type = V4L2_CTRL_TYPE_INTEGER,
112 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
114 #define dprintk(level,fmt, arg...) \
116 if (vivi.debug >= (level)) \
117 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
120 /* ------------------------------------------------------------------
122 ------------------------------------------------------------------*/
126 u32 fourcc; /* v4l2 format id */
130 static struct vivi_fmt format = {
131 .name = "4:2:2, packed, YUYV",
132 .fourcc = V4L2_PIX_FMT_YUYV,
138 struct scatterlist *sg;
141 /* buffer for one video frame */
143 /* common v4l buffer stuff -- must be first */
144 struct videobuf_buffer vb;
146 struct vivi_fmt *fmt;
148 #ifdef CONFIG_VIVI_SCATTER
149 struct sg_to_addr *to_addr;
153 struct vivi_dmaqueue {
154 struct list_head active;
155 struct list_head queued;
156 struct timer_list timeout;
158 /* thread for generating video stream*/
159 struct task_struct *kthread;
160 wait_queue_head_t wq;
161 /* Counters to control fps rate */
166 static LIST_HEAD(vivi_devlist);
169 struct list_head vivi_devlist;
171 struct semaphore lock;
175 /* various device info */
176 unsigned int resources;
177 struct video_device vfd;
179 struct vivi_dmaqueue vidq;
181 /* Several counters */
182 int h,m,s,us,jiffies;
187 struct vivi_dev *dev;
190 struct vivi_fmt *fmt;
191 unsigned int width,height;
192 struct videobuf_queue vb_vidq;
194 enum v4l2_buf_type type;
197 /* ------------------------------------------------------------------
198 DMA and thread functions
199 ------------------------------------------------------------------*/
201 /* Bars and Colors should match positions */
213 static u8 bars[8][3] = {
215 {204,204,204}, /* white */
216 {208,208, 0}, /* ambar */
217 { 0,206,206}, /* cyan */
218 { 0,239, 0}, /* green */
219 {239, 0,239}, /* magenta */
220 {205, 0, 0}, /* red */
221 { 0, 0,255}, /* blue */
225 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
226 /* RGB to V(Cr) Color transform */
227 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
228 /* RGB to U(Cb) Color transform */
229 #define TO_U(r,g,b) (((-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 #ifdef CONFIG_VIVI_SCATTER
236 static void prep_to_addr(struct sg_to_addr to_addr[],
237 struct videobuf_buffer *vb)
241 for (i=0;i<vb->dma.nr_pages;i++) {
242 to_addr[i].sg=&vb->dma.sglist[i];
244 pos += vb->dma.sglist[i].length;
248 static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
250 int p1=0,p2=pages-1,p3=pages/2;
253 BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
256 if (pos < to_addr[p3].pos) {
263 if (pos >= to_addr[p2].pos)
270 #ifdef CONFIG_VIVI_SCATTER
271 static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
272 int hmax, int line, char *timestr)
274 static void gen_line(char *basep,int inipos,int wmax,
275 int hmax, int line, char *timestr)
278 int w,i,j,pos=inipos,y;
281 #ifdef CONFIG_VIVI_SCATTER
289 spin_lock_init(&spinlock);
291 /* Get first addr pointed to pixel position */
292 oldpg=get_addr_pos(pos,pages,to_addr);
293 pg=pfn_to_page(sg_dma_address(to_addr[oldpg].sg) >> PAGE_SHIFT);
294 spin_lock_irqsave(&spinlock,flags);
295 basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
298 /* We will just duplicate the second pixel at the packet */
301 /* Generate a standard color bar pattern */
302 for (w=0;w<wmax;w++) {
307 for (color=0;color<4;color++) {
308 #ifdef CONFIG_VIVI_SCATTER
309 pgpos=get_addr_pos(pos,pages,to_addr);
311 pg=pfn_to_page(sg_dma_address(to_addr[pgpos].sg) >> PAGE_SHIFT);
312 kunmap_atomic(basep, KM_BOUNCE_READ);
313 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
316 p=basep+pos-to_addr[pgpos].pos;
324 *p=TO_Y(r,g,b); /* Luminance */
327 *p=TO_U(r,g,b); /* Cb */
330 *p=TO_V(r,g,b); /* Cr */
337 /* Checks if it is possible to show timestamp */
338 if (TSTAMP_MAX_Y>=hmax)
340 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
343 /* Print stream time */
344 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
346 for (s=timestr;*s;s++) {
347 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
349 if (chr&1<<(7-i)) { /* Font color*/
355 } else { /* Background color */
363 for (color=0;color<4;color++) {
364 #ifdef CONFIG_VIVI_SCATTER
365 pgpos=get_addr_pos(pos,pages,to_addr);
367 pg=pfn_to_page(sg_dma_address(
372 basep= kmap_atomic(pg,
374 to_addr[pgpos].sg->offset;
377 p=basep+pos-to_addr[pgpos].pos;
387 *p=TO_Y(r,g,b); /* Luminance */
390 *p=TO_U(r,g,b); /* Cb */
393 *p=TO_V(r,g,b); /* Cr */
405 #ifdef CONFIG_VIVI_SCATTER
406 kunmap_atomic(basep, KM_BOUNCE_READ);
407 spin_unlock_irqrestore(&spinlock,flags);
412 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
415 int hmax = buf->vb.height;
416 int wmax = buf->vb.width;
418 #ifdef CONFIG_VIVI_SCATTER
419 struct sg_to_addr *to_addr=buf->to_addr;
420 struct videobuf_buffer *vb=&buf->vb;
425 #ifdef CONFIG_VIVI_SCATTER
426 /* Test if DMA mapping is ready */
427 if (!sg_dma_address(&vb->dma.sglist[0]))
430 prep_to_addr(to_addr,vb);
432 /* Check if there is enough memory */
433 BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
435 if (buf->vb.dma.varea) {
436 tmpbuf=kmalloc (wmax*2, GFP_KERNEL);
438 tmpbuf=buf->vb.dma.vmalloc;
443 for (h=0;h<hmax;h++) {
444 #ifdef CONFIG_VIVI_SCATTER
445 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
447 if (buf->vb.dma.varea) {
448 gen_line(tmpbuf,0,wmax,hmax,h,dev->timestr);
449 /* FIXME: replacing to __copy_to_user */
450 if (copy_to_user(buf->vb.dma.varea+pos,tmpbuf,wmax*2)!=0)
451 dprintk(2,"vivifill copy_to_user failed.\n");
453 gen_line(tmpbuf,pos,wmax,hmax,h,dev->timestr);
459 /* Updates stream time */
461 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
462 dev->jiffies=jiffies;
463 if (dev->us>=1000000) {
477 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
478 dev->h,dev->m,dev->s,(dev->us+500)/1000);
480 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
481 (unsigned long)buf->vb.dma.varea,pos);
483 /* Advice that buffer was filled */
484 buf->vb.state = STATE_DONE;
485 buf->vb.field_count++;
486 do_gettimeofday(&ts);
489 list_del(&buf->vb.queue);
490 wake_up(&buf->vb.done);
493 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
495 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
497 struct vivi_buffer *buf;
498 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
502 /* Announces videobuf that all went ok */
503 for (bc = 0;; bc++) {
504 if (list_empty(&dma_q->active)) {
505 dprintk(1,"No active queue to serve\n");
509 buf = list_entry(dma_q->active.next,
510 struct vivi_buffer, vb.queue);
512 /* Nobody is waiting something to be done, just return */
513 if (!waitqueue_active(&buf->vb.done)) {
514 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
518 do_gettimeofday(&buf->vb.ts);
519 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
522 vivi_fillbuff(dev,buf);
524 if (list_empty(&dma_q->active)) {
525 del_timer(&dma_q->timeout);
527 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
531 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
534 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
537 DECLARE_WAITQUEUE(wait, current);
539 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
541 add_wait_queue(&dma_q->wq, &wait);
542 if (!kthread_should_stop()) {
545 /* Calculate time to wake up */
546 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
549 int old=dma_q->frame;
550 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
552 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
554 dprintk(1,"underrun, losed %d frames. "
555 "Now, frame is %d. Waking on %d jiffies\n",
556 dma_q->frame-old,dma_q->frame,timeout);
558 dprintk(1,"will sleep for %i jiffies\n",timeout);
560 vivi_thread_tick(dma_q);
562 schedule_timeout_interruptible (timeout);
565 remove_wait_queue(&dma_q->wq, &wait);
569 static int vivi_thread(void *data)
571 struct vivi_dmaqueue *dma_q=data;
573 dprintk(1,"thread started\n");
575 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
581 if (kthread_should_stop())
584 dprintk(1, "thread: exit\n");
588 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
591 dma_q->ini_jiffies=jiffies;
593 dprintk(1,"%s\n",__FUNCTION__);
595 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
597 if (IS_ERR(dma_q->kthread)) {
598 printk(KERN_ERR "vivi: kernel_thread() failed\n");
599 return PTR_ERR(dma_q->kthread);
602 wake_up_interruptible(&dma_q->wq);
604 dprintk(1,"returning from %s\n",__FUNCTION__);
608 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
610 dprintk(1,"%s\n",__FUNCTION__);
611 /* shutdown control thread */
612 if (dma_q->kthread) {
613 kthread_stop(dma_q->kthread);
618 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
620 struct vivi_buffer *buf, *prev;
621 struct list_head *item;
623 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
625 if (!list_empty(&dma_q->active)) {
626 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
627 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
630 dprintk(1,"Restarting video dma\n");
631 vivi_stop_thread(dma_q);
632 // vivi_start_thread(dma_q);
634 /* cancel all outstanding capture / vbi requests */
635 list_for_each(item,&dma_q->active) {
636 buf = list_entry(item, struct vivi_buffer, vb.queue);
638 list_del(&buf->vb.queue);
639 buf->vb.state = STATE_ERROR;
640 wake_up(&buf->vb.done);
642 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
649 if (list_empty(&dma_q->queued))
651 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
653 list_del(&buf->vb.queue);
654 list_add_tail(&buf->vb.queue,&dma_q->active);
656 dprintk(1,"Restarting video dma\n");
657 vivi_stop_thread(dma_q);
658 vivi_start_thread(dma_q);
660 buf->vb.state = STATE_ACTIVE;
661 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
662 dprintk(2,"[%p/%d] restart_queue - first active\n",
665 } else if (prev->vb.width == buf->vb.width &&
666 prev->vb.height == buf->vb.height &&
667 prev->fmt == buf->fmt) {
668 list_del(&buf->vb.queue);
669 list_add_tail(&buf->vb.queue,&dma_q->active);
670 buf->vb.state = STATE_ACTIVE;
671 dprintk(2,"[%p/%d] restart_queue - move to active\n",
680 static void vivi_vid_timeout(unsigned long data)
682 struct vivi_dev *dev = (struct vivi_dev*)data;
683 struct vivi_dmaqueue *vidq = &dev->vidq;
684 struct vivi_buffer *buf;
686 while (!list_empty(&vidq->active)) {
687 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
688 list_del(&buf->vb.queue);
689 buf->vb.state = STATE_ERROR;
690 wake_up(&buf->vb.done);
691 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
694 restart_video_queue(vidq);
697 /* ------------------------------------------------------------------
699 ------------------------------------------------------------------*/
701 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
703 struct vivi_fh *fh = vq->priv_data;
705 *size = fh->width*fh->height*2;
709 while (*size * *count > vid_limit * 1024 * 1024)
714 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
716 dprintk(1,"%s\n",__FUNCTION__);
721 #ifdef CONFIG_VIVI_SCATTER
722 /*FIXME: Maybe a spinlock is required here */
727 videobuf_waiton(&buf->vb,0,0);
728 videobuf_dma_unmap(vq, &buf->vb.dma);
729 videobuf_dma_free(&buf->vb.dma);
730 buf->vb.state = STATE_NEEDS_INIT;
733 #define norm_maxw() 1024
734 #define norm_maxh() 768
736 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
737 enum v4l2_field field)
739 struct vivi_fh *fh = vq->priv_data;
740 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
741 int rc, init_buffer = 0;
743 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
745 BUG_ON(NULL == fh->fmt);
746 if (fh->width < 48 || fh->width > norm_maxw() ||
747 fh->height < 32 || fh->height > norm_maxh())
749 buf->vb.size = fh->width*fh->height*2;
750 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
753 if (buf->fmt != fh->fmt ||
754 buf->vb.width != fh->width ||
755 buf->vb.height != fh->height ||
756 buf->vb.field != field) {
758 buf->vb.width = fh->width;
759 buf->vb.height = fh->height;
760 buf->vb.field = field;
764 if (STATE_NEEDS_INIT == buf->vb.state) {
765 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
769 buf->vb.state = STATE_PREPARED;
771 #ifdef CONFIG_VIVI_SCATTER
772 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
785 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
787 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
788 struct vivi_fh *fh = vq->priv_data;
789 struct vivi_dev *dev = fh->dev;
790 struct vivi_dmaqueue *vidq = &dev->vidq;
791 struct vivi_buffer *prev;
793 if (!list_empty(&vidq->queued)) {
794 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
795 list_add_tail(&buf->vb.queue,&vidq->queued);
796 buf->vb.state = STATE_QUEUED;
797 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
799 } else if (list_empty(&vidq->active)) {
800 list_add_tail(&buf->vb.queue,&vidq->active);
802 buf->vb.state = STATE_ACTIVE;
803 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
804 dprintk(2,"[%p/%d] buffer_queue - first active\n",
807 vivi_start_thread(vidq);
809 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
810 if (prev->vb.width == buf->vb.width &&
811 prev->vb.height == buf->vb.height &&
812 prev->fmt == buf->fmt) {
813 list_add_tail(&buf->vb.queue,&vidq->active);
814 buf->vb.state = STATE_ACTIVE;
815 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
819 list_add_tail(&buf->vb.queue,&vidq->queued);
820 buf->vb.state = STATE_QUEUED;
821 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
827 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
829 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
830 struct vivi_fh *fh = vq->priv_data;
831 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
832 struct vivi_dmaqueue *vidq = &dev->vidq;
834 dprintk(1,"%s\n",__FUNCTION__);
836 vivi_stop_thread(vidq);
841 #ifdef CONFIG_VIVI_SCATTER
842 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
847 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
848 BUG_ON(direction == DMA_NONE);
850 for (i = 0; i < nents; i++ ) {
853 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
859 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
862 dprintk(1,"%s\n",__FUNCTION__);
866 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
869 // dprintk(1,"%s\n",__FUNCTION__);
871 // flush_write_buffers();
876 static struct videobuf_queue_ops vivi_video_qops = {
877 .buf_setup = buffer_setup,
878 .buf_prepare = buffer_prepare,
879 .buf_queue = buffer_queue,
880 .buf_release = buffer_release,
882 /* Non-pci handling routines */
883 // .vb_map_sg = vivi_map_sg,
884 // .vb_dma_sync_sg = vivi_dma_sync_sg,
885 // .vb_unmap_sg = vivi_unmap_sg,
888 /* ------------------------------------------------------------------
890 ------------------------------------------------------------------*/
893 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
897 if (dev->resources) {
898 /* no, someone else uses it */
902 /* it's free, grab it */
904 dprintk(1,"res: get\n");
909 static int res_locked(struct vivi_dev *dev)
911 return (dev->resources);
914 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
918 dprintk(1,"res: put\n");
922 /* ------------------------------------------------------------------
923 IOCTL vidioc handling
924 ------------------------------------------------------------------*/
925 static int vidioc_querycap (struct file *file, void *priv,
926 struct v4l2_capability *cap)
928 strcpy(cap->driver, "vivi");
929 strcpy(cap->card, "vivi");
930 cap->version = VIVI_VERSION;
931 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
937 static int vidioc_enum_fmt_cap (struct file *file, void *priv,
938 struct v4l2_fmtdesc *f)
943 strlcpy(f->description,format.name,sizeof(f->description));
944 f->pixelformat = format.fourcc;
948 static int vidioc_g_fmt_cap (struct file *file, void *priv,
949 struct v4l2_format *f)
951 struct vivi_fh *fh=priv;
953 f->fmt.pix.width = fh->width;
954 f->fmt.pix.height = fh->height;
955 f->fmt.pix.field = fh->vb_vidq.field;
956 f->fmt.pix.pixelformat = fh->fmt->fourcc;
957 f->fmt.pix.bytesperline =
958 (f->fmt.pix.width * fh->fmt->depth) >> 3;
959 f->fmt.pix.sizeimage =
960 f->fmt.pix.height * f->fmt.pix.bytesperline;
965 static int vidioc_try_fmt_cap (struct file *file, void *priv,
966 struct v4l2_format *f)
968 struct vivi_fmt *fmt;
969 enum v4l2_field field;
970 unsigned int maxw, maxh;
972 if (format.fourcc != f->fmt.pix.pixelformat) {
973 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
974 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
979 field = f->fmt.pix.field;
981 if (field == V4L2_FIELD_ANY) {
982 // field=V4L2_FIELD_INTERLACED;
983 field=V4L2_FIELD_SEQ_TB;
984 } else if (V4L2_FIELD_INTERLACED != field) {
985 dprintk(1,"Field type invalid.\n");
992 f->fmt.pix.field = field;
993 if (f->fmt.pix.height < 32)
994 f->fmt.pix.height = 32;
995 if (f->fmt.pix.height > maxh)
996 f->fmt.pix.height = maxh;
997 if (f->fmt.pix.width < 48)
998 f->fmt.pix.width = 48;
999 if (f->fmt.pix.width > maxw)
1000 f->fmt.pix.width = maxw;
1001 f->fmt.pix.width &= ~0x03;
1002 f->fmt.pix.bytesperline =
1003 (f->fmt.pix.width * fmt->depth) >> 3;
1004 f->fmt.pix.sizeimage =
1005 f->fmt.pix.height * f->fmt.pix.bytesperline;
1010 /*FIXME: This seems to be generic enough to be at videodev2 */
1011 static int vidioc_s_fmt_cap (struct file *file, void *priv,
1012 struct v4l2_format *f)
1014 struct vivi_fh *fh=priv;
1015 int ret = vidioc_try_fmt_cap(file,fh,f);
1020 fh->width = f->fmt.pix.width;
1021 fh->height = f->fmt.pix.height;
1022 fh->vb_vidq.field = f->fmt.pix.field;
1028 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
1030 struct vivi_fh *fh=priv;
1032 return (videobuf_reqbufs(&fh->vb_vidq, p));
1035 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
1037 struct vivi_fh *fh=priv;
1039 return (videobuf_querybuf(&fh->vb_vidq, p));
1042 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1044 struct vivi_fh *fh=priv;
1046 return (videobuf_qbuf(&fh->vb_vidq, p));
1049 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1051 struct vivi_fh *fh=priv;
1053 return (videobuf_dqbuf(&fh->vb_vidq, p,
1054 file->f_flags & O_NONBLOCK));
1057 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1058 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
1060 struct vivi_fh *fh=priv;
1061 struct videobuf_queue *q=&fh->vb_vidq;
1062 struct v4l2_requestbuffers req;
1068 req.memory = V4L2_MEMORY_MMAP;
1069 ret = videobuf_reqbufs(q,&req);
1073 mbuf->frames = req.count;
1075 for (i = 0; i < mbuf->frames; i++) {
1076 mbuf->offsets[i] = q->bufs[i]->boff;
1077 mbuf->size += q->bufs[i]->bsize;
1083 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1085 struct vivi_fh *fh=priv;
1086 struct vivi_dev *dev = fh->dev;
1088 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1093 if (!res_get(dev,fh))
1095 return (videobuf_streamon(&fh->vb_vidq));
1098 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1100 struct vivi_fh *fh=priv;
1101 struct vivi_dev *dev = fh->dev;
1103 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1108 videobuf_streamoff(&fh->vb_vidq);
1114 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1119 /* only one input in this sample driver */
1120 static int vidioc_enum_input (struct file *file, void *priv,
1121 struct v4l2_input *inp)
1123 if (inp->index != 0)
1126 inp->type = V4L2_INPUT_TYPE_CAMERA;
1127 inp->std = V4L2_STD_NTSC_M;
1128 strcpy(inp->name,"Camera");
1133 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1139 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1147 /* --- controls ---------------------------------------------- */
1148 static int vidioc_queryctrl (struct file *file, void *priv,
1149 struct v4l2_queryctrl *qc)
1153 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1154 if (qc->id && qc->id == vivi_qctrl[i].id) {
1155 memcpy(qc, &(vivi_qctrl[i]),
1163 static int vidioc_g_ctrl (struct file *file, void *priv,
1164 struct v4l2_control *ctrl)
1168 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1169 if (ctrl->id == vivi_qctrl[i].id) {
1170 ctrl->value=qctl_regs[i];
1176 static int vidioc_s_ctrl (struct file *file, void *priv,
1177 struct v4l2_control *ctrl)
1181 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1182 if (ctrl->id == vivi_qctrl[i].id) {
1184 vivi_qctrl[i].minimum
1186 vivi_qctrl[i].maximum) {
1189 qctl_regs[i]=ctrl->value;
1195 /* ------------------------------------------------------------------
1196 File operations for the device
1197 ------------------------------------------------------------------*/
1199 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1201 static int vivi_open(struct inode *inode, struct file *file)
1203 int minor = iminor(inode);
1204 struct vivi_dev *h,*dev = NULL;
1206 struct list_head *list;
1207 enum v4l2_buf_type type = 0;
1210 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1212 list_for_each(list,&vivi_devlist) {
1213 h = list_entry(list, struct vivi_dev, vivi_devlist);
1214 if (h->vfd.minor == minor) {
1216 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1224 /* If more than one user, mutex should be added */
1227 dprintk(1,"open minor=%d type=%s users=%d\n",
1228 minor,v4l2_type_names[type],dev->users);
1230 /* allocate + initialize per filehandle data */
1231 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1237 file->private_data = fh;
1240 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1245 /* Put all controls at a sane state */
1246 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1247 qctl_regs[i] =vivi_qctrl[i].default_value;
1249 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1250 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1251 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1252 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1254 /* Resets frame counters */
1259 dev->jiffies=jiffies;
1260 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1261 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1263 #ifdef CONFIG_VIVI_SCATTER
1264 videobuf_queue_init(&fh->vb_vidq,VIDEOBUF_DMA_SCATTER, &vivi_video_qops,
1267 V4L2_FIELD_INTERLACED,
1268 sizeof(struct vivi_buffer),fh);
1270 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1273 V4L2_FIELD_INTERLACED,
1274 sizeof(struct vivi_buffer),fh);
1281 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1283 struct vivi_fh *fh = file->private_data;
1285 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1286 if (res_locked(fh->dev))
1288 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1289 file->f_flags & O_NONBLOCK);
1295 vivi_poll(struct file *file, struct poll_table_struct *wait)
1297 struct vivi_fh *fh = file->private_data;
1298 struct vivi_buffer *buf;
1300 dprintk(1,"%s\n",__FUNCTION__);
1302 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1305 if (res_get(fh->dev,fh)) {
1306 dprintk(1,"poll: mmap interface\n");
1307 /* streaming capture */
1308 if (list_empty(&fh->vb_vidq.stream))
1310 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1312 dprintk(1,"poll: read() interface\n");
1313 /* read() capture */
1314 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1318 poll_wait(file, &buf->vb.done, wait);
1319 if (buf->vb.state == STATE_DONE ||
1320 buf->vb.state == STATE_ERROR)
1321 return POLLIN|POLLRDNORM;
1325 static int vivi_release(struct inode *inode, struct file *file)
1327 struct vivi_fh *fh = file->private_data;
1328 struct vivi_dev *dev = fh->dev;
1329 struct vivi_dmaqueue *vidq = &dev->vidq;
1331 int minor = iminor(inode);
1333 vivi_stop_thread(vidq);
1334 videobuf_mmap_free(&fh->vb_vidq);
1340 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1346 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1348 struct vivi_fh *fh = file->private_data;
1351 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1353 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1355 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1356 (unsigned long)vma->vm_start,
1357 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1363 static const struct file_operations vivi_fops = {
1364 .owner = THIS_MODULE,
1366 .release = vivi_release,
1369 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1371 .llseek = no_llseek,
1374 static struct video_device vivi = {
1376 .type = VID_TYPE_CAPTURE,
1380 // .release = video_device_release,
1382 .vidioc_querycap = vidioc_querycap,
1383 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1384 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1385 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1386 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1387 .vidioc_reqbufs = vidioc_reqbufs,
1388 .vidioc_querybuf = vidioc_querybuf,
1389 .vidioc_qbuf = vidioc_qbuf,
1390 .vidioc_dqbuf = vidioc_dqbuf,
1391 .vidioc_s_std = vidioc_s_std,
1392 .vidioc_enum_input = vidioc_enum_input,
1393 .vidioc_g_input = vidioc_g_input,
1394 .vidioc_s_input = vidioc_s_input,
1395 .vidioc_queryctrl = vidioc_queryctrl,
1396 .vidioc_g_ctrl = vidioc_g_ctrl,
1397 .vidioc_s_ctrl = vidioc_s_ctrl,
1398 .vidioc_streamon = vidioc_streamon,
1399 .vidioc_streamoff = vidioc_streamoff,
1400 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1401 .vidiocgmbuf = vidiocgmbuf,
1403 .tvnorms = V4L2_STD_NTSC_M,
1404 .current_norm = V4L2_STD_NTSC_M,
1406 /* -----------------------------------------------------------------
1407 Initialization and module stuff
1408 ------------------------------------------------------------------*/
1410 static int __init vivi_init(void)
1413 struct vivi_dev *dev;
1415 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1418 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1420 /* init video dma queues */
1421 INIT_LIST_HEAD(&dev->vidq.active);
1422 INIT_LIST_HEAD(&dev->vidq.queued);
1423 init_waitqueue_head(&dev->vidq.wq);
1425 /* initialize locks */
1426 init_MUTEX(&dev->lock);
1428 dev->vidq.timeout.function = vivi_vid_timeout;
1429 dev->vidq.timeout.data = (unsigned long)dev;
1430 init_timer(&dev->vidq.timeout);
1432 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1433 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1437 static void __exit vivi_exit(void)
1440 struct list_head *list;
1442 while (!list_empty(&vivi_devlist)) {
1443 list = vivi_devlist.next;
1445 h = list_entry(list, struct vivi_dev, vivi_devlist);
1448 video_unregister_device(&vivi);
1451 module_init(vivi_init);
1452 module_exit(vivi_exit);
1454 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1455 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1456 MODULE_LICENSE("Dual BSD/GPL");
1458 module_param(video_nr, int, 0);
1460 module_param_named(debug,vivi.debug, int, 0644);
1461 MODULE_PARM_DESC(debug,"activates debug info");
1463 module_param(vid_limit,int,0644);
1464 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");