/*
+
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 <asm/io.h>
#include "bttvp.h"
+/* Offset from line sync pulse leading edge (0H) in 1 / sampling_rate:
+ bt8x8 /HRESET pulse starts at 0H and has length 64 / fCLKx1 (E|O_VTC
+ HSFMT = 0). VBI_HDELAY (always 0) is an offset from the trailing edge
+ of /HRESET in 1 / fCLKx1, and the sampling_rate tvnorm->Fsc is fCLKx2. */
+#define VBI_OFFSET ((64 + 0) * 2)
+
#define VBI_DEFLINES 16
#define VBI_MAXLINES 32
static unsigned int vbibufs = 4;
static unsigned int vbi_debug = 0;
-MODULE_PARM(vbibufs,"i");
+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(vbi_debug,"i");
MODULE_PARM_DESC(vbi_debug,"vbi code debug messages, default is 0 (no)");
#ifdef dprintk
return 0;
}
-static int vbi_buffer_setup(struct file *file,
+static int vbi_buffer_setup(struct videobuf_queue *q,
unsigned int *count, unsigned int *size)
{
- struct bttv_fh *fh = file->private_data;
+ struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
if (0 == *count)
return 0;
}
-static int vbi_buffer_prepare(struct file *file, struct videobuf_buffer *vb,
+static int vbi_buffer_prepare(struct videobuf_queue *q,
+ struct videobuf_buffer *vb,
enum v4l2_field field)
{
- struct bttv_fh *fh = file->private_data;
+ struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
- struct bttv_buffer *buf = (struct bttv_buffer*)vb;
+ 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;
}
static void
-vbi_buffer_queue(struct file *file, struct videobuf_buffer *vb)
+vbi_buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
- struct bttv_fh *fh = file->private_data;
+ struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
- struct bttv_buffer *buf = (struct bttv_buffer*)vb;
-
+ 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);
- bttv_set_dma(btv,0x0c,1);
+ if (NULL == btv->cvbi) {
+ fh->btv->loop_irq |= 4;
+ bttv_set_dma(btv,0x0c);
+ }
}
-static void vbi_buffer_release(struct file *file, struct videobuf_buffer *vb)
+static void vbi_buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
- struct bttv_fh *fh = file->private_data;
+ struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
- struct bttv_buffer *buf = (struct bttv_buffer*)vb;
-
+ struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
+
dprintk("free %p\n",vb);
bttv_dma_free(fh->btv,buf);
}
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;
+ s64 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.offset = VBI_OFFSET;
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 = 319;
- }
- 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;
+ /* s64 to prevent overflow. */
+ count0 = (s64) f->fmt.vbi.start[0] + f->fmt.vbi.count[0]
+ - tvnorm->vbistart[0];
+ count1 = (s64) f->fmt.vbi.start[1] + f->fmt.vbi.count[1]
+ - tvnorm->vbistart[1];
+ count = clamp (max (count0, count1), 1LL, (s64) VBI_MAXLINES);
- f->fmt.vbi.start[0] = start0;
- f->fmt.vbi.start[1] = start1;
+ f->fmt.vbi.start[0] = tvnorm->vbistart[0];
+ f->fmt.vbi.start[1] = tvnorm->vbistart[1];
f->fmt.vbi.count[0] = count;
f->fmt.vbi.count[1] = count;
+
+ f->fmt.vbi.reserved[0] = 0;
+ f->fmt.vbi.reserved[1] = 0;
}
void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f)
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.offset = VBI_OFFSET;
+ f->fmt.vbi.start[0] = tvnorm->vbistart[0];
+ f->fmt.vbi.start[1] = tvnorm->vbistart[1];
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;
- }
}
/* ----------------------------------------------------------------------- */
git://git.onelab.eu / linux-2.6.git / blobdiff