cx88-video.c

h内核

					 buf->vb.dma.sglist, UNSET, 0,
					 buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_INTERLACED:
			cx88_risc_buffer(dev->pci, &buf->risc,
					 buf->vb.dma.sglist, 0, buf->bpl,
					 buf->bpl, buf->bpl,
					 buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_TB:
			cx88_risc_buffer(dev->pci, &buf->risc,
					 buf->vb.dma.sglist,
					 0, buf->bpl * (buf->vb.height >> 1),
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_BT:
			cx88_risc_buffer(dev->pci, &buf->risc,
					 buf->vb.dma.sglist,
					 buf->bpl * (buf->vb.height >> 1), 0,
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		default:
			BUG();
		}
	}
	dprintk(2,"[%p/%d] buffer_prepare - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
		buf, buf->vb.i,
		fh->width, fh->height, fh->fmt->depth, fh->fmt->name,
		(unsigned long)buf->risc.dma);

	buf->vb.state = STATE_PREPARED;
	return 0;

 fail:
	cx88_free_buffer(dev->pci,buf);
	return rc;
}

static void
buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
	struct cx88_buffer    *prev;
	struct cx8800_fh      *fh   = vq->priv_data;
	struct cx8800_dev     *dev  = fh->dev;
	struct cx88_dmaqueue  *q    = &dev->vidq;

	/* add jump to stopper */
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);

	if (!list_empty(&q->queued)) {
		list_add_tail(&buf->vb.queue,&q->queued);
		buf->vb.state = STATE_QUEUED;
		dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
			buf, buf->vb.i);

	} else if (list_empty(&q->active)) {
		list_add_tail(&buf->vb.queue,&q->active);
		start_video_dma(dev, q, buf);
		buf->vb.state = STATE_ACTIVE;
		buf->count    = q->count++;
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(2,"[%p/%d] buffer_queue - first active\n",
			buf, buf->vb.i);

	} else {
		prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
		if (prev->vb.width  == buf->vb.width  &&
		    prev->vb.height == buf->vb.height &&
		    prev->fmt       == buf->fmt) {
			list_add_tail(&buf->vb.queue,&q->active);
			buf->vb.state = STATE_ACTIVE;
			buf->count    = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			dprintk(2,"[%p/%d] buffer_queue - append to active\n",
				buf, buf->vb.i);

		} else {
			list_add_tail(&buf->vb.queue,&q->queued);
			buf->vb.state = STATE_QUEUED;
			dprintk(2,"[%p/%d] buffer_queue - first queued\n",
				buf, buf->vb.i);
		}
	}
}

static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
	struct cx8800_fh   *fh  = q->priv_data;

	cx88_free_buffer(fh->dev->pci,buf);
}

struct videobuf_queue_ops cx8800_video_qops = {
	.buf_setup    = buffer_setup,
	.buf_prepare  = buffer_prepare,
	.buf_queue    = buffer_queue,
	.buf_release  = buffer_release,
};

/* ------------------------------------------------------------------ */

#if 0 /* overlay support not finished yet */
static u32* ov_risc_field(struct cx8800_dev *dev, struct cx8800_fh *fh,
			  u32 *rp, struct btcx_skiplist *skips,
			  u32 sync_line, int skip_even, int skip_odd)
{
	int line,maxy,start,end,skip,nskips;
	u32 ri,ra;
	u32 addr;

	/* sync instruction */
	*(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);

	addr  = (unsigned long)dev->fbuf.base;
	addr += dev->fbuf.fmt.bytesperline * fh->win.w.top;
	addr += (fh->fmt->depth >> 3)      * fh->win.w.left;

	/* scan lines */
	for (maxy = -1, line = 0; line < fh->win.w.height;
	     line++, addr += dev->fbuf.fmt.bytesperline) {
		if ((line%2) == 0  &&  skip_even)
			continue;
		if ((line%2) == 1  &&  skip_odd)
			continue;

		/* calculate clipping */
		if (line > maxy)
			btcx_calc_skips(line, fh->win.w.width, &maxy,
					skips, &nskips, fh->clips, fh->nclips);

		/* write out risc code */
		for (start = 0, skip = 0; start < fh->win.w.width; start = end) {
			if (skip >= nskips) {
				ri  = RISC_WRITE;
				end = fh->win.w.width;
			} else if (start < skips[skip].start) {
				ri  = RISC_WRITE;
				end = skips[skip].start;
			} else {
				ri  = RISC_SKIP;
				end = skips[skip].end;
				skip++;
			}
			if (RISC_WRITE == ri)
				ra = addr + (fh->fmt->depth>>3)*start;
			else
				ra = 0;

			if (0 == start)
				ri |= RISC_SOL;
			if (fh->win.w.width == end)
				ri |= RISC_EOL;
			ri |= (fh->fmt->depth>>3) * (end-start);

			*(rp++)=cpu_to_le32(ri);
			if (0 != ra)
				*(rp++)=cpu_to_le32(ra);
		}
	}
	kfree(skips);
	return rp;
}

static int ov_risc_frame(struct cx8800_dev *dev, struct cx8800_fh *fh,
			 struct cx88_buffer *buf)
{
	struct btcx_skiplist *skips;
	u32 instructions,fields;
	u32 *rp;
	int rc;

	/* skip list for window clipping */
	if (NULL == (skips = kmalloc(sizeof(*skips) * fh->nclips,GFP_KERNEL)))
		return -ENOMEM;

	fields = 0;
	if (V4L2_FIELD_HAS_TOP(fh->win.field))
		fields++;
	if (V4L2_FIELD_HAS_BOTTOM(fh->win.field))
		fields++;

        /* estimate risc mem: worst case is (clip+1) * lines instructions
           + syncs + jump (all 2 dwords) */
	instructions  = (fh->nclips+1) * fh->win.w.height;
	instructions += 3 + 4;
	if ((rc = btcx_riscmem_alloc(dev->pci,&buf->risc,instructions*8)) < 0) {
		kfree(skips);
		return rc;
	}

	/* write risc instructions */
	rp = buf->risc.cpu;
	switch (fh->win.field) {
	case V4L2_FIELD_TOP:
		rp = ov_risc_field(dev, fh, rp, skips, 0,     0, 0);
		break;
	case V4L2_FIELD_BOTTOM:
		rp = ov_risc_field(dev, fh, rp, skips, 0x200, 0, 0);
		break;
	case V4L2_FIELD_INTERLACED:
		rp = ov_risc_field(dev, fh, rp, skips, 0,     0, 1);
		rp = ov_risc_field(dev, fh, rp, skips, 0x200, 1, 0);
		break;
	default:
		BUG();
	}

	/* save pointer to jmp instruction address */
	buf->risc.jmp = rp;
	kfree(skips);
	return 0;
}

static int verify_window(struct cx8800_dev *dev, struct v4l2_window *win)
{
	enum v4l2_field field;
	int maxw, maxh;

	if (NULL == dev->fbuf.base)
		return -EINVAL;
	if (win->w.width < 48 || win->w.height <  32)
		return -EINVAL;
	if (win->clipcount > 2048)
		return -EINVAL;

	field = win->field;
	maxw  = norm_maxw(core->tvnorm);
	maxh  = norm_maxh(core->tvnorm);

	if (V4L2_FIELD_ANY == field) {
                field = (win->w.height > maxh/2)
                        ? V4L2_FIELD_INTERLACED
                        : V4L2_FIELD_TOP;
        }
        switch (field) {
        case V4L2_FIELD_TOP:
        case V4L2_FIELD_BOTTOM:
                maxh = maxh / 2;
                break;
        case V4L2_FIELD_INTERLACED:
                break;
        default:
                return -EINVAL;
        }

	win->field = field;
	if (win->w.width > maxw)
		win->w.width = maxw;
	if (win->w.height > maxh)
		win->w.height = maxh;
	return 0;
}

static int setup_window(struct cx8800_dev *dev, struct cx8800_fh *fh,
			struct v4l2_window *win)
{
	struct v4l2_clip *clips = NULL;
	int n,size,retval = 0;

	if (NULL == fh->fmt)
		return -EINVAL;
	retval = verify_window(dev,win);
	if (0 != retval)
		return retval;

	/* copy clips  --  luckily v4l1 + v4l2 are binary
	   compatible here ...*/
	n = win->clipcount;
	size = sizeof(*clips)*(n+4);
	clips = kmalloc(size,GFP_KERNEL);
	if (NULL == clips)
		return -ENOMEM;
	if (n > 0) {
		if (copy_from_user(clips,win->clips,sizeof(struct v4l2_clip)*n)) {
			kfree(clips);
			return -EFAULT;
		}
	}

	/* clip against screen */
	if (NULL != dev->fbuf.base)
		n = btcx_screen_clips(dev->fbuf.fmt.width, dev->fbuf.fmt.height,
				      &win->w, clips, n);
	btcx_sort_clips(clips,n);

	/* 4-byte alignments */
	switch (fh->fmt->depth) {
	case 8:
	case 24:
		btcx_align(&win->w, clips, n, 3);
		break;
	case 16:
		btcx_align(&win->w, clips, n, 1);
		break;
	case 32:
		/* no alignment fixups needed */
		break;
	default:
		BUG();
	}

	down(&fh->vidq.lock);
	if (fh->clips)
		kfree(fh->clips);
	fh->clips    = clips;
	fh->nclips   = n;
	fh->win      = *win;
#if 0
	fh->ov.setup_ok = 1;
#endif

	/* update overlay if needed */
	retval = 0;
#if 0
	if (check_btres(fh, RESOURCE_OVERLAY)) {
		struct bttv_buffer *new;

		new = videobuf_alloc(sizeof(*new));
		bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
		retval = bttv_switch_overlay(btv,fh,new);
	}
#endif
	up(&fh->vidq.lock);
	return retval;
}
#endif

/* ------------------------------------------------------------------ */

static struct videobuf_queue* get_queue(struct cx8800_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &fh->vidq;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return &fh->vbiq;
	default:
		BUG();
		return NULL;
	}
}

static int get_ressource(struct cx8800_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return RESOURCE_VIDEO;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return RESOURCE_VBI;
	default:
		BUG();
		return 0;
	}
}

static int video_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct cx8800_dev *h,*dev = NULL;
	struct cx8800_fh *fh;
	struct list_head *list;
	enum v4l2_buf_type type = 0;
	int radio = 0;

	list_for_each(list,&cx8800_devlist) {
		h = list_entry(list, struct cx8800_dev, devlist);
		if (h->video_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		}
		if (h->vbi_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VBI_CAPTURE;
		}
		if (h->radio_dev &&
		    h->radio_dev->minor == minor) {
			radio = 1;
			dev   = h;
		}
	}
	if (NULL == dev)
		return -ENODEV;

	dprintk(1,"open minor=%d radio=%d type=%s\n",
		minor,radio,v4l2_type_names[type]);

	/* allocate + initialize per filehandle data */
	fh = kmalloc(sizeof(*fh),GFP_KERNEL);
	if (NULL == fh)
		return -ENOMEM;
	memset(fh,0,sizeof(*fh));
	file->private_data = fh;
	fh->dev      = dev;
	fh->radio    = radio;
	fh->type     = type;
	fh->width    = 320;
	fh->height   = 240;
	fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_BGR24);

	videobuf_queue_init(&fh->vidq, &cx8800_video_qops,
			    dev->pci, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_INTERLACED,
			    sizeof(struct cx88_buffer),
			    fh);
	videobuf_queue_init(&fh->vbiq, &cx8800_vbi_qops,
			    dev->pci, &dev->slock,
			    V4L2_BUF_TYPE_VBI_CAPTURE,
			    V4L2_FIELD_SEQ_TB,
			    sizeof(struct cx88_buffer),
			    fh);

	if (fh->radio) {
		struct cx88_core *core = dev->core;
		int board = core->board;
		dprintk(1,"video_open: setting radio device\n");
		cx_write(MO_GP0_IO, cx88_boards[board].radio.gpio0);
		cx_write(MO_GP1_IO, cx88_boards[board].radio.gpio1);
		cx_write(MO_GP2_IO, cx88_boards[board].radio.gpio2);
		cx_write(MO_GP3_IO, cx88_boards[board].radio.gpio3);
		dev->core->tvaudio = WW_FM;
		cx88_set_tvaudio(core);
		cx88_set_stereo(core,V4L2_TUNER_MODE_STEREO);
		cx88_call_i2c_clients(dev->core,AUDC_SET_RADIO,NULL);
	}

        return 0;
}

static ssize_t
video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
	struct cx8800_fh *fh = file->private_data;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (res_locked(fh->dev,RESOURCE_VIDEO))
			return -EBUSY;
		return videobuf_read_one(&fh->vidq, data, count, ppos,
					 file->f_flags & O_NONBLOCK);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (!res_get(fh->dev,fh,RESOURCE_VBI))
			return -EBUSY;
		return videobuf_read_stream(&fh->vbiq, data, count, ppos, 1,
					    file->f_flags & O_NONBLOCK);
	default:
		BUG();
		return 0;
	}
}

static unsigned int
video_poll(struct file *file, struct poll_table_struct *wait)
{
	struct cx8800_fh *fh = file->private_data;
	struct cx88_buffer *buf;

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
		if (!res_get(fh->dev,fh,RESOURCE_VBI))
			return POLLERR;
		return videobuf_poll_stream(file, &fh->vbiq, wait);
	}

	if (res_check(fh,RESOURCE_VIDEO)) {
		/* streaming capture */
		if (list_empty(&fh->vidq.stream))
			return POLLERR;
		buf = list_entry(fh->vidq.stream.next,struct cx88_buffer,vb.stream);
	} else {
		/* read() capture */
		buf = (struct cx88_buffer*)fh->vidq.read_buf;
		if (NULL == buf)
			return POLLERR;
	}
	poll_wait(file, &buf->vb.done, wait);
	if (buf->vb.state == STATE_DONE ||
	    buf->vb.state == STATE_ERROR)
		return POLLIN|POLLRDNORM;
	return 0;
}

static int video_release(struct inode *inode, struct file *file)
{
	struct cx8800_fh  *fh  = file->private_data;
	struct cx8800_dev *dev = fh->dev;

	/* turn off overlay */
	if (res_check(fh, RESOURCE_OVERLAY)) {
		/* FIXME */
		res_free(dev,fh,RESOURCE_OVERLAY);
	}

	/* stop video capture */
	if (res_check(fh, RESOURCE_VIDEO)) {
		videobuf_queue_cancel(&fh->vidq);
		res_free(dev,fh,RESOURCE_VIDEO);
	}
	if (fh->vidq.read_buf) {
		buffer_release(&fh->vidq,fh->vidq.read_buf);
		kfree(fh->vidq.read_buf);
	}

	/* stop vbi capture */
	if (res_check(fh, RESOURCE_VBI)) {
		if (fh->vbiq.streaming)
			videobuf_streamoff(&fh->vbiq);
		if (fh->vbiq.reading)
			videobuf_read_stop(&fh->vbiq);
		res_free(dev,fh,RESOURCE_VBI);
	}

	file->private_data = NULL;
	kfree(fh);
	return 0;
}

static int
video_mmap(struct file *file, struct vm_area_struct * vma)
{
	struct cx8800_fh *fh = file->private_data;

	return videobuf_mmap_mapper(get_queue(fh), vma);
}

/* ------------------------------------------------------------------ */

static int get_control(struct cx8800_dev *dev, struct v4l2_control *ctl)
{
	struct cx88_core *core = dev->core;
	struct cx88_ctrl *c = NULL;
	u32 value;
	int i;

	for (i = 0; i < CX8800_CTLS; i++)
		if (cx8800_ctls[i].v.id == ctl->id)
			c = &cx8800_ctls[i];
	if (NULL == c)
		return -EINVAL;

	value = c->sreg ? cx_sread(c->sreg) : cx_read(c->reg);
	switch (ctl->id) {
	case V4L2_CID_AUDIO_BALANCE:
		ctl->value = (value & 0x40) ? (value & 0x3f) : (0x40 - (value & 0x3f));
		break;
	case V4L2_CID_AUDIO_VOLUME:
		ctl->value = 0x3f - (value & 0x3f);
		break;
	default:
		ctl->value = ((value + (c->off << c->shift)) & c->mask) >> c->shift;
		break;
	}
	return 0;
}

static int set_control(struct cx8800_dev *dev, struct v4l2_control *ctl)
{
	struct cx88_core *core = dev->core;
	struct cx88_ctrl *c = NULL;
        u32 v_sat_value;
	u32 value;
	int i;

	for (i = 0; i < CX8800_CTLS; i++)
		if (cx8800_ctls[i].v.id == ctl->id)