1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/media/video/bttv-vbi.c b/drivers/media/video/bttv-vbi.c
new file mode 100644
index 000000000000..06f3e62b3e8d
--- /dev/null
+++ b/drivers/media/video/bttv-vbi.c
@@ -0,0 +1,235 @@
+/*
+    $Id: bttv-vbi.c,v 1.9 2005/01/13 17:22:33 kraxel Exp $
+
+    bttv - Bt848 frame grabber driver
+    vbi interface
+
+    (c) 2002 Gerd Knorr <kraxel@bytesex.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/kdev_t.h>
+#include <asm/io.h>
+#include "bttvp.h"
+
+#define VBI_DEFLINES 16
+#define VBI_MAXLINES 32
+
+static unsigned int vbibufs = 4;
+static unsigned int vbi_debug = 0;
+
+module_param(vbibufs,   int, 0444);
+module_param(vbi_debug, int, 0644);
+MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32, default 4");
+MODULE_PARM_DESC(vbi_debug,"vbi code debug messages, default is 0 (no)");
+
+#ifdef dprintk
+# undef dprintk
+#endif
+#define dprintk(fmt, arg...)	if (vbi_debug) \
+	printk(KERN_DEBUG "bttv%d/vbi: " fmt, btv->c.nr , ## arg)
+
+/* ----------------------------------------------------------------------- */
+/* vbi risc code + mm                                                      */
+
+static int
+vbi_buffer_risc(struct bttv *btv, struct bttv_buffer *buf, int lines)
+{
+	int bpl = 2048;
+
+	bttv_risc_packed(btv, &buf->top, buf->vb.dma.sglist,
+			 0, bpl-4, 4, lines);
+	bttv_risc_packed(btv, &buf->bottom, buf->vb.dma.sglist,
+			 lines * bpl, bpl-4, 4, lines);
+	return 0;
+}
+
+static int vbi_buffer_setup(struct videobuf_queue *q,
+			    unsigned int *count, unsigned int *size)
+{
+	struct bttv_fh *fh = q->priv_data;
+	struct bttv *btv = fh->btv;
+
+	if (0 == *count)
+		*count = vbibufs;
+	*size = fh->lines * 2 * 2048;
+	dprintk("setup: lines=%d\n",fh->lines);
+	return 0;
+}
+
+static int vbi_buffer_prepare(struct videobuf_queue *q,
+			      struct videobuf_buffer *vb,
+			      enum v4l2_field field)
+{
+	struct bttv_fh *fh = q->priv_data;
+	struct bttv *btv = fh->btv;
+	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
+	int rc;
+
+	buf->vb.size = fh->lines * 2 * 2048;
+	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
+		return -EINVAL;
+
+	if (STATE_NEEDS_INIT == buf->vb.state) {
+		if (0 != (rc = videobuf_iolock(btv->c.pci, &buf->vb, NULL)))
+			goto fail;
+		if (0 != (rc = vbi_buffer_risc(btv,buf,fh->lines)))
+			goto fail;
+	}
+	buf->vb.state = STATE_PREPARED;
+	buf->vb.field = field;
+	dprintk("buf prepare %p: top=%p bottom=%p field=%s\n",
+		vb, &buf->top, &buf->bottom,
+		v4l2_field_names[buf->vb.field]);
+	return 0;
+
+ fail:
+	bttv_dma_free(btv,buf);
+	return rc;
+}
+
+static void
+vbi_buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+	struct bttv_fh *fh = q->priv_data;
+	struct bttv *btv = fh->btv;
+	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
+
+	dprintk("queue %p\n",vb);
+	buf->vb.state = STATE_QUEUED;
+	list_add_tail(&buf->vb.queue,&btv->vcapture);
+	if (NULL == btv->cvbi) {
+		fh->btv->loop_irq |= 4;
+		bttv_set_dma(btv,0x0c);
+	}
+}
+
+static void vbi_buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+	struct bttv_fh *fh = q->priv_data;
+	struct bttv *btv = fh->btv;
+	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
+
+	dprintk("free %p\n",vb);
+	bttv_dma_free(fh->btv,buf);
+}
+
+struct videobuf_queue_ops bttv_vbi_qops = {
+	.buf_setup    = vbi_buffer_setup,
+	.buf_prepare  = vbi_buffer_prepare,
+	.buf_queue    = vbi_buffer_queue,
+	.buf_release  = vbi_buffer_release,
+};
+
+/* ----------------------------------------------------------------------- */
+
+void bttv_vbi_setlines(struct bttv_fh *fh, struct bttv *btv, int lines)
+{
+	int vdelay;
+
+	if (lines < 1)
+		lines = 1;
+	if (lines > VBI_MAXLINES)
+		lines = VBI_MAXLINES;
+	fh->lines = lines;
+
+	vdelay = btread(BT848_E_VDELAY_LO);
+	if (vdelay < lines*2) {
+		vdelay = lines*2;
+		btwrite(vdelay,BT848_E_VDELAY_LO);
+		btwrite(vdelay,BT848_O_VDELAY_LO);
+	}
+}
+
+void bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_format *f)
+{
+	const struct bttv_tvnorm *tvnorm;
+	u32 start0,start1;
+	s32 count0,count1,count;
+
+	tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
+	f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
+	f->fmt.vbi.sampling_rate    = tvnorm->Fsc;
+	f->fmt.vbi.samples_per_line = 2048;
+	f->fmt.vbi.sample_format    = V4L2_PIX_FMT_GREY;
+	f->fmt.vbi.offset           = 244;
+	f->fmt.vbi.flags            = 0;
+	switch (fh->btv->tvnorm) {
+	case 1: /* NTSC */
+		start0 = 10;
+		start1 = 273;
+		break;
+	case 0: /* PAL */
+	case 2: /* SECAM */
+	default:
+		start0 = 7;
+		start1 = 320;
+	}
+
+	count0 = (f->fmt.vbi.start[0] + f->fmt.vbi.count[0]) - start0;
+	count1 = (f->fmt.vbi.start[1] + f->fmt.vbi.count[1]) - start1;
+	count  = max(count0,count1);
+	if (count > VBI_MAXLINES)
+		count = VBI_MAXLINES;
+	if (count < 1)
+		count = 1;
+
+	f->fmt.vbi.start[0] = start0;
+	f->fmt.vbi.start[1] = start1;
+	f->fmt.vbi.count[0] = count;
+	f->fmt.vbi.count[1] = count;
+}
+
+void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f)
+{
+	const struct bttv_tvnorm *tvnorm;
+
+	tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
+	memset(f,0,sizeof(*f));
+	f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
+	f->fmt.vbi.sampling_rate    = tvnorm->Fsc;
+	f->fmt.vbi.samples_per_line = 2048;
+	f->fmt.vbi.sample_format    = V4L2_PIX_FMT_GREY;
+	f->fmt.vbi.offset           = 244;
+	f->fmt.vbi.count[0]         = fh->lines;
+	f->fmt.vbi.count[1]         = fh->lines;
+	f->fmt.vbi.flags            = 0;
+	switch (fh->btv->tvnorm) {
+	case 1: /* NTSC */
+		f->fmt.vbi.start[0] = 10;
+		f->fmt.vbi.start[1] = 273;
+		break;
+	case 0: /* PAL */
+	case 2: /* SECAM */
+	default:
+		f->fmt.vbi.start[0] = 7;
+		f->fmt.vbi.start[1] = 319;
+	}
+}
+
+/* ----------------------------------------------------------------------- */
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */