Added missing tegra files.HEADmaster

1 files changed, 454 insertions, 0 deletions

diff --git a/drivers/media/video/bt8xx/bttv-vbi.c b/drivers/media/video/bt8xx/bttv-vbi.c
new file mode 100644
index 00000000000..e79a402fa6c
--- /dev/null
+++ b/drivers/media/video/bt8xx/bttv-vbi.c
@@ -0,0 +1,454 @@
+/*
+
+    bttv - Bt848 frame grabber driver
+    vbi interface
+
+    (c) 2002 Gerd Knorr <kraxel@bytesex.org>
+
+    Copyright (C) 2005, 2006 Michael H. Schimek <mschimek@gmx.at>
+    Sponsored by OPQ Systems AB
+
+    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/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/kdev_t.h>
+#include <media/v4l2-ioctl.h>
+#include <asm/io.h>
+#include "bttvp.h"
+
+/* Offset from line sync pulse leading edge (0H) to start of VBI capture,
+   in fCLKx2 pixels.  According to the datasheet, VBI capture starts
+   VBI_HDELAY fCLKx1 pixels from the tailing edgeof /HRESET, and /HRESET
+   is 64 fCLKx1 pixels wide.  VBI_HDELAY is set to 0, so this should be
+   (64 + 0) * 2 = 128 fCLKx2 pixels.  But it's not!  The datasheet is
+   Just Plain Wrong.  The real value appears to be different for
+   different revisions of the bt8x8 chips, and to be affected by the
+   horizontal scaling factor.  Experimentally, the value is measured
+   to be about 244.  */
+#define VBI_OFFSET 244
+
+/* 2048 for compatibility with earlier driver versions. The driver
+   really stores 1024 + tvnorm->vbipack * 4 samples per line in the
+   buffer. Note tvnorm->vbipack is <= 0xFF (limit of VBIPACK_LO + HI
+   is 0x1FF DWORDs) and VBI read()s store a frame counter in the last
+   four bytes of the VBI image. */
+#define VBI_BPL 2048
+
+/* Compatibility. */
+#define VBI_DEFLINES 16
+
+static unsigned int vbibufs = 4;
+static unsigned int vbi_debug;
+
+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)
+
+#define IMAGE_SIZE(fmt) \
+        (((fmt)->count[0] + (fmt)->count[1]) * (fmt)->samples_per_line)
+
+/* ----------------------------------------------------------------------- */
+/* vbi risc code + mm                                                      */
+
+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 = IMAGE_SIZE(&fh->vbi_fmt.fmt);
+
+        dprintk("setup: samples=%u start=%d,%d count=%u,%u\n",
+                fh->vbi_fmt.fmt.samples_per_line,
+                fh->vbi_fmt.fmt.start[0],
+                fh->vbi_fmt.fmt.start[1],
+                fh->vbi_fmt.fmt.count[0],
+                fh->vbi_fmt.fmt.count[1]);
+
+        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);
+        const struct bttv_tvnorm *tvnorm;
+        unsigned int skip_lines0, skip_lines1, min_vdelay;
+        int redo_dma_risc;
+        int rc;
+
+        buf->vb.size = IMAGE_SIZE(&fh->vbi_fmt.fmt);
+        if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
+                return -EINVAL;
+
+        tvnorm = fh->vbi_fmt.tvnorm;
+
+        /* There's no VBI_VDELAY register, RISC must skip the lines
+           we don't want. With default parameters we skip zero lines
+           as earlier driver versions did. The driver permits video
+           standard changes while capturing, so we use vbi_fmt.tvnorm
+           instead of btv->tvnorm to skip zero lines after video
+           standard changes as well. */
+
+        skip_lines0 = 0;
+        skip_lines1 = 0;
+
+        if (fh->vbi_fmt.fmt.count[0] > 0)
+                skip_lines0 = max(0, (fh->vbi_fmt.fmt.start[0]
+                                      - tvnorm->vbistart[0]));
+        if (fh->vbi_fmt.fmt.count[1] > 0)
+                skip_lines1 = max(0, (fh->vbi_fmt.fmt.start[1]
+                                      - tvnorm->vbistart[1]));
+
+        redo_dma_risc = 0;
+
+        if (buf->vbi_skip[0] != skip_lines0 ||
+            buf->vbi_skip[1] != skip_lines1 ||
+            buf->vbi_count[0] != fh->vbi_fmt.fmt.count[0] ||
+            buf->vbi_count[1] != fh->vbi_fmt.fmt.count[1]) {
+                buf->vbi_skip[0] = skip_lines0;
+                buf->vbi_skip[1] = skip_lines1;
+                buf->vbi_count[0] = fh->vbi_fmt.fmt.count[0];
+                buf->vbi_count[1] = fh->vbi_fmt.fmt.count[1];
+                redo_dma_risc = 1;
+        }
+
+        if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
+                redo_dma_risc = 1;
+                if (0 != (rc = videobuf_iolock(q, &buf->vb, NULL)))
+                        goto fail;
+        }
+
+        if (redo_dma_risc) {
+                unsigned int bpl, padding, offset;
+                struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+
+                bpl = 2044; /* max. vbipack */
+                padding = VBI_BPL - bpl;
+
+                if (fh->vbi_fmt.fmt.count[0] > 0) {
+                        rc = bttv_risc_packed(btv, &buf->top,
+                                              dma->sglist,
+                                              /* offset */ 0, bpl,
+                                              padding, skip_lines0,
+                                              fh->vbi_fmt.fmt.count[0]);
+                        if (0 != rc)
+                                goto fail;
+                }
+
+                if (fh->vbi_fmt.fmt.count[1] > 0) {
+                        offset = fh->vbi_fmt.fmt.count[0] * VBI_BPL;
+
+                        rc = bttv_risc_packed(btv, &buf->bottom,
+                                              dma->sglist,
+                                              offset, bpl,
+                                              padding, skip_lines1,
+                                              fh->vbi_fmt.fmt.count[1]);
+                        if (0 != rc)
+                                goto fail;
+                }
+        }
+
+        /* VBI capturing ends at VDELAY, start of video capturing,
+           no matter where the RISC program ends. VDELAY minimum is 2,
+           bounds.top is the corresponding first field line number
+           times two. VDELAY counts half field lines. */
+        min_vdelay = MIN_VDELAY;
+        if (fh->vbi_fmt.end >= tvnorm->cropcap.bounds.top)
+                min_vdelay += fh->vbi_fmt.end - tvnorm->cropcap.bounds.top;
+
+        /* For bttv_buffer_activate_vbi(). */
+        buf->geo.vdelay = min_vdelay;
+
+        buf->vb.state = VIDEOBUF_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(q,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 = VIDEOBUF_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(q,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,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int try_fmt(struct v4l2_vbi_format *f, const struct bttv_tvnorm *tvnorm,
+                        __s32 crop_start)
+{
+        __s32 min_start, max_start, max_end, f2_offset;
+        unsigned int i;
+
+        /* For compatibility with earlier driver versions we must pretend
+           the VBI and video capture window may overlap. In reality RISC
+           magic aborts VBI capturing at the first line of video capturing,
+           leaving the rest of the buffer unchanged, usually all zero.
+           VBI capturing must always start before video capturing. >> 1
+           because cropping counts field lines times two. */
+        min_start = tvnorm->vbistart[0];
+        max_start = (crop_start >> 1) - 1;
+        max_end = (tvnorm->cropcap.bounds.top
+                   + tvnorm->cropcap.bounds.height) >> 1;
+
+        if (min_start > max_start)
+                return -EBUSY;
+
+        BUG_ON(max_start >= max_end);
+
+        f->sampling_rate    = tvnorm->Fsc;
+        f->samples_per_line = VBI_BPL;
+        f->sample_format    = V4L2_PIX_FMT_GREY;
+        f->offset           = VBI_OFFSET;
+
+        f2_offset = tvnorm->vbistart[1] - tvnorm->vbistart[0];
+
+        for (i = 0; i < 2; ++i) {
+                if (0 == f->count[i]) {
+                        /* No data from this field. We leave f->start[i]
+                           alone because VIDIOCSVBIFMT is w/o and EINVALs
+                           when a driver does not support exactly the
+                           requested parameters. */
+                } else {
+                        s64 start, count;
+
+                        start = clamp(f->start[i], min_start, max_start);
+                        /* s64 to prevent overflow. */
+                        count = (s64) f->start[i] + f->count[i] - start;
+                        f->start[i] = start;
+                        f->count[i] = clamp(count, (s64) 1,
+                                            max_end - start);
+                }
+
+                min_start += f2_offset;
+                max_start += f2_offset;
+                max_end += f2_offset;
+        }
+
+        if (0 == (f->count[0] | f->count[1])) {
+                /* As in earlier driver versions. */
+                f->start[0] = tvnorm->vbistart[0];
+                f->start[1] = tvnorm->vbistart[1];
+                f->count[0] = 1;
+                f->count[1] = 1;
+        }
+
+        f->flags = 0;
+
+        f->reserved[0] = 0;
+        f->reserved[1] = 0;
+
+        return 0;
+}
+
+int bttv_try_fmt_vbi_cap(struct file *file, void *f, struct v4l2_format *frt)
+{
+        struct bttv_fh *fh = f;
+        struct bttv *btv = fh->btv;
+        const struct bttv_tvnorm *tvnorm;
+        __s32 crop_start;
+
+        mutex_lock(&btv->lock);
+
+        tvnorm = &bttv_tvnorms[btv->tvnorm];
+        crop_start = btv->crop_start;
+
+        mutex_unlock(&btv->lock);
+
+        return try_fmt(&frt->fmt.vbi, tvnorm, crop_start);
+}
+
+
+int bttv_s_fmt_vbi_cap(struct file *file, void *f, struct v4l2_format *frt)
+{
+        struct bttv_fh *fh = f;
+        struct bttv *btv = fh->btv;
+        const struct bttv_tvnorm *tvnorm;
+        __s32 start1, end;
+        int rc;
+
+        mutex_lock(&btv->lock);
+
+        rc = -EBUSY;
+        if (fh->resources & RESOURCE_VBI)
+                goto fail;
+
+        tvnorm = &bttv_tvnorms[btv->tvnorm];
+
+        rc = try_fmt(&frt->fmt.vbi, tvnorm, btv->crop_start);
+        if (0 != rc)
+                goto fail;
+
+        start1 = frt->fmt.vbi.start[1] - tvnorm->vbistart[1] +
+                tvnorm->vbistart[0];
+
+        /* First possible line of video capturing. Should be
+           max(f->start[0] + f->count[0], start1 + f->count[1]) * 2
+           when capturing both fields. But for compatibility we must
+           pretend the VBI and video capture window may overlap,
+           so end = start + 1, the lowest possible value, times two
+           because vbi_fmt.end counts field lines times two. */
+        end = max(frt->fmt.vbi.start[0], start1) * 2 + 2;
+
+        mutex_lock(&fh->vbi.vb_lock);
+
+        fh->vbi_fmt.fmt    = frt->fmt.vbi;
+        fh->vbi_fmt.tvnorm = tvnorm;
+        fh->vbi_fmt.end    = end;
+
+        mutex_unlock(&fh->vbi.vb_lock);
+
+        rc = 0;
+
+ fail:
+        mutex_unlock(&btv->lock);
+
+        return rc;
+}
+
+
+int bttv_g_fmt_vbi_cap(struct file *file, void *f, struct v4l2_format *frt)
+{
+        struct bttv_fh *fh = f;
+        const struct bttv_tvnorm *tvnorm;
+
+        frt->fmt.vbi = fh->vbi_fmt.fmt;
+
+        tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
+
+        if (tvnorm != fh->vbi_fmt.tvnorm) {
+                __s32 max_end;
+                unsigned int i;
+
+                /* As in vbi_buffer_prepare() this imitates the
+                   behaviour of earlier driver versions after video
+                   standard changes, with default parameters anyway. */
+
+                max_end = (tvnorm->cropcap.bounds.top
+                           + tvnorm->cropcap.bounds.height) >> 1;
+
+                frt->fmt.vbi.sampling_rate = tvnorm->Fsc;
+
+                for (i = 0; i < 2; ++i) {
+                        __s32 new_start;
+
+                        new_start = frt->fmt.vbi.start[i]
+                                + tvnorm->vbistart[i]
+                                - fh->vbi_fmt.tvnorm->vbistart[i];
+
+                        frt->fmt.vbi.start[i] = min(new_start, max_end - 1);
+                        frt->fmt.vbi.count[i] =
+                                min((__s32) frt->fmt.vbi.count[i],
+                                          max_end - frt->fmt.vbi.start[i]);
+
+                        max_end += tvnorm->vbistart[1]
+                                - tvnorm->vbistart[0];
+                }
+        }
+        return 0;
+}
+
+void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, unsigned int norm)
+{
+        const struct bttv_tvnorm *tvnorm;
+        unsigned int real_samples_per_line;
+        unsigned int real_count;
+
+        tvnorm = &bttv_tvnorms[norm];
+
+        f->fmt.sampling_rate    = tvnorm->Fsc;
+        f->fmt.samples_per_line = VBI_BPL;
+        f->fmt.sample_format    = V4L2_PIX_FMT_GREY;
+        f->fmt.offset           = VBI_OFFSET;
+        f->fmt.start[0]         = tvnorm->vbistart[0];
+        f->fmt.start[1]         = tvnorm->vbistart[1];
+        f->fmt.count[0]         = VBI_DEFLINES;
+        f->fmt.count[1]         = VBI_DEFLINES;
+        f->fmt.flags            = 0;
+        f->fmt.reserved[0]      = 0;
+        f->fmt.reserved[1]      = 0;
+
+        /* For compatibility the buffer size must be 2 * VBI_DEFLINES *
+           VBI_BPL regardless of the current video standard. */
+        real_samples_per_line   = 1024 + tvnorm->vbipack * 4;
+        real_count              = ((tvnorm->cropcap.defrect.top >> 1)
+                                   - tvnorm->vbistart[0]);
+
+        BUG_ON(real_samples_per_line > VBI_BPL);
+        BUG_ON(real_count > VBI_DEFLINES);
+
+        f->tvnorm               = tvnorm;
+
+        /* See bttv_vbi_fmt_set(). */
+        f->end                  = tvnorm->vbistart[0] * 2 + 2;
+}
+
+/* ----------------------------------------------------------------------- */
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */