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:
+ */