Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c
new file mode 100644
index 0000000..8dd4d15
--- /dev/null
+++ b/drivers/media/common/saa7146_video.c
@@ -0,0 +1,1509 @@
+#include <media/saa7146_vv.h>
+
+static int max_memory = 32;
+
+module_param(max_memory, int, 0644);
+MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
+
+#define IS_CAPTURE_ACTIVE(fh) \
+ (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
+
+#define IS_OVERLAY_ACTIVE(fh) \
+ (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
+
+/* format descriptions for capture and preview */
+static struct saa7146_format formats[] = {
+ {
+ .name = "RGB-8 (3-3-2)",
+ .pixelformat = V4L2_PIX_FMT_RGB332,
+ .trans = RGB08_COMPOSED,
+ .depth = 8,
+ .flags = 0,
+ }, {
+ .name = "RGB-16 (5/B-6/G-5/R)",
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ .trans = RGB16_COMPOSED,
+ .depth = 16,
+ .flags = 0,
+ }, {
+ .name = "RGB-24 (B-G-R)",
+ .pixelformat = V4L2_PIX_FMT_BGR24,
+ .trans = RGB24_COMPOSED,
+ .depth = 24,
+ .flags = 0,
+ }, {
+ .name = "RGB-32 (B-G-R)",
+ .pixelformat = V4L2_PIX_FMT_BGR32,
+ .trans = RGB32_COMPOSED,
+ .depth = 32,
+ .flags = 0,
+ }, {
+ .name = "RGB-32 (R-G-B)",
+ .pixelformat = V4L2_PIX_FMT_RGB32,
+ .trans = RGB32_COMPOSED,
+ .depth = 32,
+ .flags = 0,
+ .swap = 0x2,
+ }, {
+ .name = "Greyscale-8",
+ .pixelformat = V4L2_PIX_FMT_GREY,
+ .trans = Y8,
+ .depth = 8,
+ .flags = 0,
+ }, {
+ .name = "YUV 4:2:2 planar (Y-Cb-Cr)",
+ .pixelformat = V4L2_PIX_FMT_YUV422P,
+ .trans = YUV422_DECOMPOSED,
+ .depth = 16,
+ .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
+ }, {
+ .name = "YVU 4:2:0 planar (Y-Cb-Cr)",
+ .pixelformat = V4L2_PIX_FMT_YVU420,
+ .trans = YUV420_DECOMPOSED,
+ .depth = 12,
+ .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
+ }, {
+ .name = "YUV 4:2:0 planar (Y-Cb-Cr)",
+ .pixelformat = V4L2_PIX_FMT_YUV420,
+ .trans = YUV420_DECOMPOSED,
+ .depth = 12,
+ .flags = FORMAT_IS_PLANAR,
+ }, {
+ .name = "YUV 4:2:2 (U-Y-V-Y)",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .trans = YUV422_COMPOSED,
+ .depth = 16,
+ .flags = 0,
+ }
+};
+
+/* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
+ due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
+ (like V4L2_PIX_FMT_YUYV) ... 8-( */
+
+static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
+
+struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
+{
+ int i, j = NUM_FORMATS;
+
+ for (i = 0; i < j; i++) {
+ if (formats[i].pixelformat == fourcc) {
+ return formats+i;
+ }
+ }
+
+ DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
+ return NULL;
+}
+
+static int g_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
+{
+ struct saa7146_dev *dev = fh->dev;
+ DEB_EE(("dev:%p, fh:%p\n",dev,fh));
+
+ switch (f->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ f->fmt.pix = fh->video_fmt;
+ return 0;
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+ f->fmt.win = fh->ov.win;
+ return 0;
+ case V4L2_BUF_TYPE_VBI_CAPTURE:
+ {
+ f->fmt.vbi = fh->vbi_fmt;
+ return 0;
+ }
+ default:
+ DEB_D(("invalid format type '%d'.\n",f->type));
+ return -EINVAL;
+ }
+}
+
+static int try_win(struct saa7146_dev *dev, struct v4l2_window *win)
+{
+ struct saa7146_vv *vv = dev->vv_data;
+ enum v4l2_field field;
+ int maxw, maxh;
+
+ DEB_EE(("dev:%p\n",dev));
+
+ if (NULL == vv->ov_fb.base) {
+ DEB_D(("no fb base set.\n"));
+ return -EINVAL;
+ }
+ if (NULL == vv->ov_fmt) {
+ DEB_D(("no fb fmt set.\n"));
+ return -EINVAL;
+ }
+ if (win->w.width < 48 || win->w.height < 32) {
+ DEB_D(("min width/height. (%d,%d)\n",win->w.width,win->w.height));
+ return -EINVAL;
+ }
+ if (win->clipcount > 16) {
+ DEB_D(("clipcount too big.\n"));
+ return -EINVAL;
+ }
+
+ field = win->field;
+ maxw = vv->standard->h_max_out;
+ maxh = vv->standard->v_max_out;
+
+ 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:
+ case V4L2_FIELD_ALTERNATE:
+ maxh = maxh / 2;
+ break;
+ case V4L2_FIELD_INTERLACED:
+ break;
+ default: {
+ DEB_D(("no known field mode '%d'.\n",field));
+ 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 try_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ int err;
+
+ switch (f->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ {
+ struct saa7146_format *fmt;
+ enum v4l2_field field;
+ int maxw, maxh;
+ int calc_bpl;
+
+ DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
+
+ fmt = format_by_fourcc(dev,f->fmt.pix.pixelformat);
+ if (NULL == fmt) {
+ return -EINVAL;
+ }
+
+ field = f->fmt.pix.field;
+ maxw = vv->standard->h_max_out;
+ maxh = vv->standard->v_max_out;
+
+ if (V4L2_FIELD_ANY == field) {
+ field = (f->fmt.pix.height > maxh/2)
+ ? V4L2_FIELD_INTERLACED
+ : V4L2_FIELD_BOTTOM;
+ }
+ switch (field) {
+ case V4L2_FIELD_ALTERNATE: {
+ vv->last_field = V4L2_FIELD_TOP;
+ maxh = maxh / 2;
+ break;
+ }
+ case V4L2_FIELD_TOP:
+ case V4L2_FIELD_BOTTOM:
+ vv->last_field = V4L2_FIELD_INTERLACED;
+ maxh = maxh / 2;
+ break;
+ case V4L2_FIELD_INTERLACED:
+ vv->last_field = V4L2_FIELD_INTERLACED;
+ break;
+ default: {
+ DEB_D(("no known field mode '%d'.\n",field));
+ return -EINVAL;
+ }
+ }
+
+ f->fmt.pix.field = field;
+ if (f->fmt.pix.width > maxw)
+ f->fmt.pix.width = maxw;
+ if (f->fmt.pix.height > maxh)
+ f->fmt.pix.height = maxh;
+
+ calc_bpl = (f->fmt.pix.width * fmt->depth)/8;
+
+ if (f->fmt.pix.bytesperline < calc_bpl)
+ f->fmt.pix.bytesperline = calc_bpl;
+
+ if (f->fmt.pix.bytesperline > (2*PAGE_SIZE * fmt->depth)/8) /* arbitrary constraint */
+ f->fmt.pix.bytesperline = calc_bpl;
+
+ f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+ DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",f->fmt.pix.width,f->fmt.pix.height,f->fmt.pix.bytesperline,f->fmt.pix.sizeimage));
+
+ return 0;
+ }
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+ DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
+ err = try_win(dev,&f->fmt.win);
+ if (0 != err) {
+ return err;
+ }
+ return 0;
+ default:
+ DEB_EE(("unknown format type '%d'\n",f->type));
+ return -EINVAL;
+ }
+}
+
+int saa7146_start_preview(struct saa7146_fh *fh)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ int ret = 0, err = 0;
+
+ DEB_EE(("dev:%p, fh:%p\n",dev,fh));
+
+ /* check if we have overlay informations */
+ if( NULL == fh->ov.fh ) {
+ DEB_D(("no overlay data available. try S_FMT first.\n"));
+ return -EAGAIN;
+ }
+
+ /* check if streaming capture is running */
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ DEB_D(("streaming capture is active.\n"));
+ return -EBUSY;
+ }
+
+ /* check if overlay is running */
+ if (IS_OVERLAY_ACTIVE(fh) != 0) {
+ if (vv->video_fh == fh) {
+ DEB_D(("overlay is already active.\n"));
+ return 0;
+ }
+ DEB_D(("overlay is already active in another open.\n"));
+ return -EBUSY;
+ }
+
+ if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
+ DEB_D(("cannot get necessary overlay resources\n"));
+ return -EBUSY;
+ }
+
+ err = try_win(dev,&fh->ov.win);
+ if (0 != err) {
+ saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
+ return -EBUSY;
+ }
+
+ vv->ov_data = &fh->ov;
+
+ DEB_D(("%dx%d+%d+%d %s field=%s\n",
+ fh->ov.win.w.width,fh->ov.win.w.height,
+ fh->ov.win.w.left,fh->ov.win.w.top,
+ vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
+
+ if (0 != (ret = saa7146_enable_overlay(fh))) {
+ DEB_D(("enabling overlay failed: %d\n",ret));
+ saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
+ return ret;
+ }
+
+ vv->video_status = STATUS_OVERLAY;
+ vv->video_fh = fh;
+
+ return 0;
+}
+
+int saa7146_stop_preview(struct saa7146_fh *fh)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ DEB_EE(("dev:%p, fh:%p\n",dev,fh));
+
+ /* check if streaming capture is running */
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ DEB_D(("streaming capture is active.\n"));
+ return -EBUSY;
+ }
+
+ /* check if overlay is running at all */
+ if ((vv->video_status & STATUS_OVERLAY) == 0) {
+ DEB_D(("no active overlay.\n"));
+ return 0;
+ }
+
+ if (vv->video_fh != fh) {
+ DEB_D(("overlay is active, but in another open.\n"));
+ return -EBUSY;
+ }
+
+ vv->video_status = 0;
+ vv->video_fh = NULL;
+
+ saa7146_disable_overlay(fh);
+
+ saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
+
+ return 0;
+}
+
+static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ int err;
+
+ switch (f->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ DEB_EE(("streaming capture is active\n"));
+ return -EBUSY;
+ }
+ err = try_fmt(fh,f);
+ if (0 != err)
+ return err;
+ fh->video_fmt = f->fmt.pix;
+ DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat));
+ return 0;
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+ DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
+ err = try_win(dev,&f->fmt.win);
+ if (0 != err)
+ return err;
+ down(&dev->lock);
+ fh->ov.win = f->fmt.win;
+ fh->ov.nclips = f->fmt.win.clipcount;
+ if (fh->ov.nclips > 16)
+ fh->ov.nclips = 16;
+ if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) {
+ up(&dev->lock);
+ return -EFAULT;
+ }
+
+ /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
+ fh->ov.fh = fh;
+
+ up(&dev->lock);
+
+ /* check if our current overlay is active */
+ if (IS_OVERLAY_ACTIVE(fh) != 0) {
+ saa7146_stop_preview(fh);
+ saa7146_start_preview(fh);
+ }
+ return 0;
+ default:
+ DEB_D(("unknown format type '%d'\n",f->type));
+ return -EINVAL;
+ }
+}
+
+/********************************************************************************/
+/* device controls */
+
+static struct v4l2_queryctrl controls[] = {
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = 128,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ },{
+ .id = V4L2_CID_CONTRAST,
+ .name = "Contrast",
+ .minimum = 0,
+ .maximum = 127,
+ .step = 1,
+ .default_value = 64,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ },{
+ .id = V4L2_CID_SATURATION,
+ .name = "Saturation",
+ .minimum = 0,
+ .maximum = 127,
+ .step = 1,
+ .default_value = 64,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ },{
+ .id = V4L2_CID_VFLIP,
+ .name = "Vertical flip",
+ .minimum = 0,
+ .maximum = 1,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ },{
+ .id = V4L2_CID_HFLIP,
+ .name = "Horizontal flip",
+ .minimum = 0,
+ .maximum = 1,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ },
+};
+static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
+
+#define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
+
+static struct v4l2_queryctrl* ctrl_by_id(int id)
+{
+ int i;
+
+ for (i = 0; i < NUM_CONTROLS; i++)
+ if (controls[i].id == id)
+ return controls+i;
+ return NULL;
+}
+
+static int get_control(struct saa7146_fh *fh, struct v4l2_control *c)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ const struct v4l2_queryctrl* ctrl;
+ u32 value = 0;
+
+ ctrl = ctrl_by_id(c->id);
+ if (NULL == ctrl)
+ return -EINVAL;
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ value = saa7146_read(dev, BCS_CTRL);
+ c->value = 0xff & (value >> 24);
+ DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value));
+ break;
+ case V4L2_CID_CONTRAST:
+ value = saa7146_read(dev, BCS_CTRL);
+ c->value = 0x7f & (value >> 16);
+ DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value));
+ break;
+ case V4L2_CID_SATURATION:
+ value = saa7146_read(dev, BCS_CTRL);
+ c->value = 0x7f & (value >> 0);
+ DEB_D(("V4L2_CID_SATURATION: %d\n",c->value));
+ break;
+ case V4L2_CID_VFLIP:
+ c->value = vv->vflip;
+ DEB_D(("V4L2_CID_VFLIP: %d\n",c->value));
+ break;
+ case V4L2_CID_HFLIP:
+ c->value = vv->hflip;
+ DEB_D(("V4L2_CID_HFLIP: %d\n",c->value));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int set_control(struct saa7146_fh *fh, struct v4l2_control *c)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ const struct v4l2_queryctrl* ctrl;
+
+ ctrl = ctrl_by_id(c->id);
+ if (NULL == ctrl) {
+ DEB_D(("unknown control %d\n",c->id));
+ return -EINVAL;
+ }
+
+ down(&dev->lock);
+
+ switch (ctrl->type) {
+ case V4L2_CTRL_TYPE_BOOLEAN:
+ case V4L2_CTRL_TYPE_MENU:
+ case V4L2_CTRL_TYPE_INTEGER:
+ if (c->value < ctrl->minimum)
+ c->value = ctrl->minimum;
+ if (c->value > ctrl->maximum)
+ c->value = ctrl->maximum;
+ break;
+ default:
+ /* nothing */;
+ };
+
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS: {
+ u32 value = saa7146_read(dev, BCS_CTRL);
+ value &= 0x00ffffff;
+ value |= (c->value << 24);
+ saa7146_write(dev, BCS_CTRL, value);
+ saa7146_write(dev, MC2, MASK_22 | MASK_06 );
+ break;
+ }
+ case V4L2_CID_CONTRAST: {
+ u32 value = saa7146_read(dev, BCS_CTRL);
+ value &= 0xff00ffff;
+ value |= (c->value << 16);
+ saa7146_write(dev, BCS_CTRL, value);
+ saa7146_write(dev, MC2, MASK_22 | MASK_06 );
+ break;
+ }
+ case V4L2_CID_SATURATION: {
+ u32 value = saa7146_read(dev, BCS_CTRL);
+ value &= 0xffffff00;
+ value |= (c->value << 0);
+ saa7146_write(dev, BCS_CTRL, value);
+ saa7146_write(dev, MC2, MASK_22 | MASK_06 );
+ break;
+ }
+ case V4L2_CID_HFLIP:
+ /* fixme: we can support changing VFLIP and HFLIP here... */
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
+ up(&dev->lock);
+ return -EINVAL;
+ }
+ vv->hflip = c->value;
+ break;
+ case V4L2_CID_VFLIP:
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
+ up(&dev->lock);
+ return -EINVAL;
+ }
+ vv->vflip = c->value;
+ break;
+ default: {
+ return -EINVAL;
+ }
+ }
+ up(&dev->lock);
+
+ if (IS_OVERLAY_ACTIVE(fh) != 0) {
+ saa7146_stop_preview(fh);
+ saa7146_start_preview(fh);
+ }
+ return 0;
+}
+
+/********************************************************************************/
+/* common pagetable functions */
+
+static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
+{
+ struct pci_dev *pci = dev->pci;
+ struct scatterlist *list = buf->vb.dma.sglist;
+ int length = buf->vb.dma.sglen;
+ struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
+
+ DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
+
+ if( 0 != IS_PLANAR(sfmt->trans)) {
+ struct saa7146_pgtable *pt1 = &buf->pt[0];
+ struct saa7146_pgtable *pt2 = &buf->pt[1];
+ struct saa7146_pgtable *pt3 = &buf->pt[2];
+ u32 *ptr1, *ptr2, *ptr3;
+ u32 fill;
+
+ int size = buf->fmt->width*buf->fmt->height;
+ int i,p,m1,m2,m3,o1,o2;
+
+ switch( sfmt->depth ) {
+ case 12: {
+ /* create some offsets inside the page table */
+ m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
+ m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
+ m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
+ o1 = size%PAGE_SIZE;
+ o2 = (size+(size/4))%PAGE_SIZE;
+ DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
+ break;
+ }
+ case 16: {
+ /* create some offsets inside the page table */
+ m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
+ m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
+ m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
+ o1 = size%PAGE_SIZE;
+ o2 = (size+(size/2))%PAGE_SIZE;
+ DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
+ break;
+ }
+ default: {
+ return -1;
+ }
+ }
+
+ ptr1 = pt1->cpu;
+ ptr2 = pt2->cpu;
+ ptr3 = pt3->cpu;
+
+ /* walk all pages, copy all page addresses to ptr1 */
+ for (i = 0; i < length; i++, list++) {
+ for (p = 0; p * 4096 < list->length; p++, ptr1++) {
+ *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
+ }
+ }
+/*
+ ptr1 = pt1->cpu;
+ for(j=0;j<40;j++) {
+ printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
+ }
+*/
+
+ /* if we have a user buffer, the first page may not be
+ aligned to a page boundary. */
+ pt1->offset = buf->vb.dma.sglist->offset;
+ pt2->offset = pt1->offset+o1;
+ pt3->offset = pt1->offset+o2;
+
+ /* create video-dma2 page table */
+ ptr1 = pt1->cpu;
+ for(i = m1; i <= m2 ; i++, ptr2++) {
+ *ptr2 = ptr1[i];
+ }
+ fill = *(ptr2-1);
+ for(;i<1024;i++,ptr2++) {
+ *ptr2 = fill;
+ }
+ /* create video-dma3 page table */
+ ptr1 = pt1->cpu;
+ for(i = m2; i <= m3; i++,ptr3++) {
+ *ptr3 = ptr1[i];
+ }
+ fill = *(ptr3-1);
+ for(;i<1024;i++,ptr3++) {
+ *ptr3 = fill;
+ }
+ /* finally: finish up video-dma1 page table */
+ ptr1 = pt1->cpu+m1;
+ fill = pt1->cpu[m1];
+ for(i=m1;i<1024;i++,ptr1++) {
+ *ptr1 = fill;
+ }
+/*
+ ptr1 = pt1->cpu;
+ ptr2 = pt2->cpu;
+ ptr3 = pt3->cpu;
+ for(j=0;j<40;j++) {
+ printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
+ }
+ for(j=0;j<40;j++) {
+ printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
+ }
+ for(j=0;j<40;j++) {
+ printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
+ }
+*/
+ } else {
+ struct saa7146_pgtable *pt = &buf->pt[0];
+ return saa7146_pgtable_build_single(pci, pt, list, length);
+ }
+
+ return 0;
+}
+
+
+/********************************************************************************/
+/* file operations */
+
+static int video_begin(struct saa7146_fh *fh)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ struct saa7146_format *fmt = NULL;
+ unsigned int resource;
+ int ret = 0, err = 0;
+
+ DEB_EE(("dev:%p, fh:%p\n",dev,fh));
+
+ if ((vv->video_status & STATUS_CAPTURE) != 0) {
+ if (vv->video_fh == fh) {
+ DEB_S(("already capturing.\n"));
+ return 0;
+ }
+ DEB_S(("already capturing in another open.\n"));
+ return -EBUSY;
+ }
+
+ if ((vv->video_status & STATUS_OVERLAY) != 0) {
+ DEB_S(("warning: suspending overlay video for streaming capture.\n"));
+ vv->ov_suspend = vv->video_fh;
+ err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
+ if (0 != err) {
+ DEB_D(("suspending video failed. aborting\n"));
+ return err;
+ }
+ }
+
+ fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
+ /* we need to have a valid format set here */
+ BUG_ON(NULL == fmt);
+
+ if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
+ resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
+ } else {
+ resource = RESOURCE_DMA1_HPS;
+ }
+
+ ret = saa7146_res_get(fh, resource);
+ if (0 == ret) {
+ DEB_S(("cannot get capture resource %d\n",resource));
+ if (vv->ov_suspend != NULL) {
+ saa7146_start_preview(vv->ov_suspend);
+ vv->ov_suspend = NULL;
+ }
+ return -EBUSY;
+ }
+
+ /* clear out beginning of streaming bit (rps register 0)*/
+ saa7146_write(dev, MC2, MASK_27 );
+
+ /* enable rps0 irqs */
+ SAA7146_IER_ENABLE(dev, MASK_27);
+
+ vv->video_fh = fh;
+ vv->video_status = STATUS_CAPTURE;
+
+ return 0;
+}
+
+static int video_end(struct saa7146_fh *fh, struct file *file)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ struct saa7146_format *fmt = NULL;
+ unsigned long flags;
+ unsigned int resource;
+ u32 dmas = 0;
+ DEB_EE(("dev:%p, fh:%p\n",dev,fh));
+
+ if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
+ DEB_S(("not capturing.\n"));
+ return 0;
+ }
+
+ if (vv->video_fh != fh) {
+ DEB_S(("capturing, but in another open.\n"));
+ return -EBUSY;
+ }
+
+ fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
+ /* we need to have a valid format set here */
+ BUG_ON(NULL == fmt);
+
+ if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
+ resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
+ dmas = MASK_22 | MASK_21 | MASK_20;
+ } else {
+ resource = RESOURCE_DMA1_HPS;
+ dmas = MASK_22;
+ }
+ spin_lock_irqsave(&dev->slock,flags);
+
+ /* disable rps0 */
+ saa7146_write(dev, MC1, MASK_28);
+
+ /* disable rps0 irqs */
+ SAA7146_IER_DISABLE(dev, MASK_27);
+
+ /* shut down all used video dma transfers */
+ saa7146_write(dev, MC1, dmas);
+
+ spin_unlock_irqrestore(&dev->slock, flags);
+
+ vv->video_fh = NULL;
+ vv->video_status = 0;
+
+ saa7146_res_free(fh, resource);
+
+ if (vv->ov_suspend != NULL) {
+ saa7146_start_preview(vv->ov_suspend);
+ vv->ov_suspend = NULL;
+ }
+
+ return 0;
+}
+
+/*
+ * This function is _not_ called directly, but from
+ * video_generic_ioctl (and maybe others). userspace
+ * copying is done already, arg is a kernel pointer.
+ */
+
+int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
+{
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ int err = 0, result = 0, ee = 0;
+
+ struct saa7146_use_ops *ops;
+ struct videobuf_queue *q;
+
+ /* check if extension handles the command */
+ for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
+ if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
+ break;
+ }
+
+ if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
+ DEB_D(("extension handles ioctl exclusive.\n"));
+ result = dev->ext_vv_data->ioctl(fh, cmd, arg);
+ return result;
+ }
+ if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
+ DEB_D(("extension handles ioctl before.\n"));
+ result = dev->ext_vv_data->ioctl(fh, cmd, arg);
+ if( -EAGAIN != result ) {
+ return result;
+ }
+ }
+
+ /* fixme: add handle "after" case (is it still needed?) */
+
+ switch (fh->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
+ ops = &saa7146_video_uops;
+ q = &fh->video_q;
+ break;
+ }
+ case V4L2_BUF_TYPE_VBI_CAPTURE: {
+ ops = &saa7146_vbi_uops;
+ q = &fh->vbi_q;
+ break;
+ }
+ default:
+ BUG();
+ return 0;
+ }
+
+ switch (cmd) {
+ case VIDIOC_QUERYCAP:
+ {
+ struct v4l2_capability *cap = arg;
+ memset(cap,0,sizeof(*cap));
+
+ DEB_EE(("VIDIOC_QUERYCAP\n"));
+
+ strcpy(cap->driver, "saa7146 v4l2");
+ strlcpy(cap->card, dev->ext->name, sizeof(cap->card));
+ sprintf(cap->bus_info,"PCI:%s", pci_name(dev->pci));
+ cap->version = SAA7146_VERSION_CODE;
+ cap->capabilities =
+ V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_VIDEO_OVERLAY |
+ V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING;
+ cap->capabilities |= dev->ext_vv_data->capabilities;
+ return 0;
+ }
+ case VIDIOC_G_FBUF:
+ {
+ struct v4l2_framebuffer *fb = arg;
+
+ DEB_EE(("VIDIOC_G_FBUF\n"));
+
+ *fb = vv->ov_fb;
+ fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
+ return 0;
+ }
+ case VIDIOC_S_FBUF:
+ {
+ struct v4l2_framebuffer *fb = arg;
+ struct saa7146_format *fmt;
+
+ DEB_EE(("VIDIOC_S_FBUF\n"));
+
+ if(!capable(CAP_SYS_ADMIN) &&
+ !capable(CAP_SYS_RAWIO))
+ return -EPERM;
+
+ /* check args */
+ fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
+ if (NULL == fmt) {
+ return -EINVAL;
+ }
+
+ /* planar formats are not allowed for overlay video, clipping and video dma would clash */
+ if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
+ DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
+ }
+
+ /* check if overlay is running */
+ if (IS_OVERLAY_ACTIVE(fh) != 0) {
+ if (vv->video_fh != fh) {
+ DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
+ return -EBUSY;
+ }
+ }
+
+ down(&dev->lock);
+
+ /* ok, accept it */
+ vv->ov_fb = *fb;
+ vv->ov_fmt = fmt;
+ if (0 == vv->ov_fb.fmt.bytesperline)
+ vv->ov_fb.fmt.bytesperline =
+ vv->ov_fb.fmt.width*fmt->depth/8;
+
+ up(&dev->lock);
+
+ return 0;
+ }
+ case VIDIOC_ENUM_FMT:
+ {
+ struct v4l2_fmtdesc *f = arg;
+ int index;
+
+ switch (f->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
+ index = f->index;
+ if (index < 0 || index >= NUM_FORMATS) {
+ return -EINVAL;
+ }
+ memset(f,0,sizeof(*f));
+ f->index = index;
+ strlcpy(f->description,formats[index].name,sizeof(f->description));
+ f->pixelformat = formats[index].pixelformat;
+ break;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
+ return 0;
+ }
+ case VIDIOC_QUERYCTRL:
+ {
+ const struct v4l2_queryctrl *ctrl;
+ struct v4l2_queryctrl *c = arg;
+
+ if ((c->id < V4L2_CID_BASE ||
+ c->id >= V4L2_CID_LASTP1) &&
+ (c->id < V4L2_CID_PRIVATE_BASE ||
+ c->id >= V4L2_CID_PRIVATE_LASTP1))
+ return -EINVAL;
+
+ ctrl = ctrl_by_id(c->id);
+ if( NULL == ctrl ) {
+ return -EINVAL;
+/*
+ c->flags = V4L2_CTRL_FLAG_DISABLED;
+ return 0;
+*/
+ }
+
+ DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
+ *c = *ctrl;
+ return 0;
+ }
+ case VIDIOC_G_CTRL: {
+ DEB_EE(("VIDIOC_G_CTRL\n"));
+ return get_control(fh,arg);
+ }
+ case VIDIOC_S_CTRL:
+ {
+ DEB_EE(("VIDIOC_S_CTRL\n"));
+ err = set_control(fh,arg);
+ return err;
+ }
+ case VIDIOC_G_PARM:
+ {
+ struct v4l2_streamparm *parm = arg;
+ if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
+ return -EINVAL;
+ }
+ memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
+ parm->parm.capture.readbuffers = 1;
+ // fixme: only for PAL!
+ parm->parm.capture.timeperframe.numerator = 1;
+ parm->parm.capture.timeperframe.denominator = 25;
+ return 0;
+ }
+ case VIDIOC_G_FMT:
+ {
+ struct v4l2_format *f = arg;
+ DEB_EE(("VIDIOC_G_FMT\n"));
+ return g_fmt(fh,f);
+ }
+ case VIDIOC_S_FMT:
+ {
+ struct v4l2_format *f = arg;
+ DEB_EE(("VIDIOC_S_FMT\n"));
+ return s_fmt(fh,f);
+ }
+ case VIDIOC_TRY_FMT:
+ {
+ struct v4l2_format *f = arg;
+ DEB_EE(("VIDIOC_TRY_FMT\n"));
+ return try_fmt(fh,f);
+ }
+ case VIDIOC_G_STD:
+ {
+ v4l2_std_id *id = arg;
+ DEB_EE(("VIDIOC_G_STD\n"));
+ *id = vv->standard->id;
+ return 0;
+ }
+ /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
+ PAL / NTSC / SECAM. if your hardware does not (or does more)
+ -- override this function in your extension */
+ case VIDIOC_ENUMSTD:
+ {
+ struct v4l2_standard *e = arg;
+ if (e->index < 0 )
+ return -EINVAL;
+ if( e->index < dev->ext_vv_data->num_stds ) {
+ DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
+ v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
+ return 0;
+ }
+ return -EINVAL;
+ }
+ case VIDIOC_S_STD:
+ {
+ v4l2_std_id *id = arg;
+ int found = 0;
+ int i, err;
+
+ DEB_EE(("VIDIOC_S_STD\n"));
+
+ if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
+ DEB_D(("cannot change video standard while streaming capture is active\n"));
+ return -EBUSY;
+ }
+
+ if ((vv->video_status & STATUS_OVERLAY) != 0) {
+ vv->ov_suspend = vv->video_fh;
+ err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
+ if (0 != err) {
+ DEB_D(("suspending video failed. aborting\n"));
+ return err;
+ }
+ }
+
+ down(&dev->lock);
+
+ for(i = 0; i < dev->ext_vv_data->num_stds; i++)
+ if (*id & dev->ext_vv_data->stds[i].id)
+ break;
+ if (i != dev->ext_vv_data->num_stds) {
+ vv->standard = &dev->ext_vv_data->stds[i];
+ if( NULL != dev->ext_vv_data->std_callback )
+ dev->ext_vv_data->std_callback(dev, vv->standard);
+ found = 1;
+ }
+
+ up(&dev->lock);
+
+ if (vv->ov_suspend != NULL) {
+ saa7146_start_preview(vv->ov_suspend);
+ vv->ov_suspend = NULL;
+ }
+
+ if( 0 == found ) {
+ DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
+ return -EINVAL;
+ }
+
+ DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
+ return 0;
+ }
+ case VIDIOC_OVERLAY:
+
+
+
+
+ {
+ int on = *(int *)arg;
+ int err = 0;
+
+ DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
+ if (on != 0) {
+ err = saa7146_start_preview(fh);
+ } else {
+ err = saa7146_stop_preview(fh);
+ }
+ return err;
+ }
+ case VIDIOC_REQBUFS: {
+ struct v4l2_requestbuffers *req = arg;
+ DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
+ return videobuf_reqbufs(q,req);
+ }
+ case VIDIOC_QUERYBUF: {
+ struct v4l2_buffer *buf = arg;
+ DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
+ return videobuf_querybuf(q,buf);
+ }
+ case VIDIOC_QBUF: {
+ struct v4l2_buffer *buf = arg;
+ int ret = 0;
+ ret = videobuf_qbuf(q,buf);
+ DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
+ return ret;
+ }
+ case VIDIOC_DQBUF: {
+ struct v4l2_buffer *buf = arg;
+ int ret = 0;
+ ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
+ DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
+ return ret;
+ }
+ case VIDIOC_STREAMON: {
+ int *type = arg;
+ DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
+
+ err = video_begin(fh);
+ if( 0 != err) {
+ return err;
+ }
+ err = videobuf_streamon(q);
+ return err;
+ }
+ case VIDIOC_STREAMOFF: {
+ int *type = arg;
+
+ DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
+
+ /* ugly: we need to copy some checks from video_end(),
+ because videobuf_streamoff() relies on the capture running.
+ check and fix this */
+ if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
+ DEB_S(("not capturing.\n"));
+ return 0;
+ }
+
+ if (vv->video_fh != fh) {
+ DEB_S(("capturing, but in another open.\n"));
+ return -EBUSY;
+ }
+
+ err = videobuf_streamoff(q);
+ if (0 != err) {
+ DEB_D(("warning: videobuf_streamoff() failed.\n"));
+ video_end(fh, file);
+ } else {
+ err = video_end(fh, file);
+ }
+ return err;
+ }
+ case VIDIOCGMBUF:
+ {
+ struct video_mbuf *mbuf = arg;
+ struct videobuf_queue *q;
+ int i;
+
+ /* fixme: number of capture buffers and sizes for v4l apps */
+ int gbuffers = 2;
+ int gbufsize = 768*576*4;
+
+ DEB_D(("VIDIOCGMBUF \n"));
+
+ q = &fh->video_q;
+ down(&q->lock);
+ err = videobuf_mmap_setup(q,gbuffers,gbufsize,
+ V4L2_MEMORY_MMAP);
+ if (err < 0) {
+ up(&q->lock);
+ return err;
+ }
+ memset(mbuf,0,sizeof(*mbuf));
+ mbuf->frames = gbuffers;
+ mbuf->size = gbuffers * gbufsize;
+ for (i = 0; i < gbuffers; i++)
+ mbuf->offsets[i] = i * gbufsize;
+ up(&q->lock);
+ return 0;
+ }
+ default:
+ return v4l_compat_translate_ioctl(inode,file,cmd,arg,
+ saa7146_video_do_ioctl);
+ }
+ return 0;
+}
+
+/*********************************************************************************/
+/* buffer handling functions */
+
+static int buffer_activate (struct saa7146_dev *dev,
+ struct saa7146_buf *buf,
+ struct saa7146_buf *next)
+{
+ struct saa7146_vv *vv = dev->vv_data;
+
+ buf->vb.state = STATE_ACTIVE;
+ saa7146_set_capture(dev,buf,next);
+
+ mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
+ return 0;
+}
+
+static int buffer_prepare(struct videobuf_queue *q,
+ struct videobuf_buffer *vb, enum v4l2_field field)
+{
+ struct file *file = q->priv_data;
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ struct saa7146_buf *buf = (struct saa7146_buf *)vb;
+ int size,err = 0;
+
+ DEB_CAP(("vbuf:%p\n",vb));
+
+ /* sanity checks */
+ if (fh->video_fmt.width < 48 ||
+ fh->video_fmt.height < 32 ||
+ fh->video_fmt.width > vv->standard->h_max_out ||
+ fh->video_fmt.height > vv->standard->v_max_out) {
+ DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
+ return -EINVAL;
+ }
+
+ size = fh->video_fmt.sizeimage;
+ if (0 != buf->vb.baddr && buf->vb.bsize < size) {
+ DEB_D(("size mismatch.\n"));
+ return -EINVAL;
+ }
+
+ DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
+ fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
+ if (buf->vb.width != fh->video_fmt.width ||
+ buf->vb.bytesperline != fh->video_fmt.bytesperline ||
+ buf->vb.height != fh->video_fmt.height ||
+ buf->vb.size != size ||
+ buf->vb.field != field ||
+ buf->vb.field != fh->video_fmt.field ||
+ buf->fmt != &fh->video_fmt) {
+ saa7146_dma_free(dev,buf);
+ }
+
+ if (STATE_NEEDS_INIT == buf->vb.state) {
+ struct saa7146_format *sfmt;
+
+ buf->vb.bytesperline = fh->video_fmt.bytesperline;
+ buf->vb.width = fh->video_fmt.width;
+ buf->vb.height = fh->video_fmt.height;
+ buf->vb.size = size;
+ buf->vb.field = field;
+ buf->fmt = &fh->video_fmt;
+ buf->vb.field = fh->video_fmt.field;
+
+ sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
+
+ if( 0 != IS_PLANAR(sfmt->trans)) {
+ saa7146_pgtable_free(dev->pci, &buf->pt[0]);
+ saa7146_pgtable_free(dev->pci, &buf->pt[1]);
+ saa7146_pgtable_free(dev->pci, &buf->pt[2]);
+
+ saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
+ saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
+ saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
+ } else {
+ saa7146_pgtable_free(dev->pci, &buf->pt[0]);
+ saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
+ }
+
+ err = videobuf_iolock(dev->pci,&buf->vb, &vv->ov_fb);
+ if (err)
+ goto oops;
+ err = saa7146_pgtable_build(dev,buf);
+ if (err)
+ goto oops;
+ }
+ buf->vb.state = STATE_PREPARED;
+ buf->activate = buffer_activate;
+
+ return 0;
+
+ oops:
+ DEB_D(("error out.\n"));
+ saa7146_dma_free(dev,buf);
+
+ return err;
+}
+
+static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
+{
+ struct file *file = q->priv_data;
+ struct saa7146_fh *fh = file->private_data;
+
+ if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
+ *count = MAX_SAA7146_CAPTURE_BUFFERS;
+
+ *size = fh->video_fmt.sizeimage;
+
+ /* check if we exceed the "max_memory" parameter */
+ if( (*count * *size) > (max_memory*1048576) ) {
+ *count = (max_memory*1048576) / *size;
+ }
+
+ DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
+
+ return 0;
+}
+
+static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct file *file = q->priv_data;
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ struct saa7146_buf *buf = (struct saa7146_buf *)vb;
+
+ DEB_CAP(("vbuf:%p\n",vb));
+ saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
+}
+
+
+static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct file *file = q->priv_data;
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_buf *buf = (struct saa7146_buf *)vb;
+
+ DEB_CAP(("vbuf:%p\n",vb));
+ saa7146_dma_free(dev,buf);
+}
+
+static struct videobuf_queue_ops video_qops = {
+ .buf_setup = buffer_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .buf_release = buffer_release,
+};
+
+/********************************************************************************/
+/* file operations */
+
+static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
+{
+ INIT_LIST_HEAD(&vv->video_q.queue);
+
+ init_timer(&vv->video_q.timeout);
+ vv->video_q.timeout.function = saa7146_buffer_timeout;
+ vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
+ vv->video_q.dev = dev;
+
+ /* set some default values */
+ vv->standard = &dev->ext_vv_data->stds[0];
+
+ /* FIXME: what's this? */
+ vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
+ vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
+}
+
+
+static int video_open(struct saa7146_dev *dev, struct file *file)
+{
+ struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
+ struct saa7146_format *sfmt;
+
+ fh->video_fmt.width = 384;
+ fh->video_fmt.height = 288;
+ fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
+ fh->video_fmt.bytesperline = 0;
+ fh->video_fmt.field = V4L2_FIELD_ANY;
+ sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
+ fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
+
+ videobuf_queue_init(&fh->video_q, &video_qops,
+ dev->pci, &dev->slock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ V4L2_FIELD_INTERLACED,
+ sizeof(struct saa7146_buf),
+ file);
+
+ init_MUTEX(&fh->video_q.lock);
+
+ return 0;
+}
+
+
+static void video_close(struct saa7146_dev *dev, struct file *file)
+{
+ struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
+ struct saa7146_vv *vv = dev->vv_data;
+ int err;
+
+ if (IS_CAPTURE_ACTIVE(fh) != 0) {
+ err = video_end(fh, file);
+ } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
+ err = saa7146_stop_preview(fh);
+ }
+
+ /* hmm, why is this function declared void? */
+ /* return err */
+}
+
+
+static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
+{
+ struct saa7146_vv *vv = dev->vv_data;
+ struct saa7146_dmaqueue *q = &vv->video_q;
+
+ spin_lock(&dev->slock);
+ DEB_CAP(("called.\n"));
+
+ /* only finish the buffer if we have one... */
+ if( NULL != q->curr ) {
+ saa7146_buffer_finish(dev,q,STATE_DONE);
+ }
+ saa7146_buffer_next(dev,q,0);
+
+ spin_unlock(&dev->slock);
+}
+
+static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
+{
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+ ssize_t ret = 0;
+
+ DEB_EE(("called.\n"));
+
+ if ((vv->video_status & STATUS_CAPTURE) != 0) {
+ /* fixme: should we allow read() captures while streaming capture? */
+ if (vv->video_fh == fh) {
+ DEB_S(("already capturing.\n"));
+ return -EBUSY;
+ }
+ DEB_S(("already capturing in another open.\n"));
+ return -EBUSY;
+ }
+
+ ret = video_begin(fh);
+ if( 0 != ret) {
+ goto out;
+ }
+
+ ret = videobuf_read_one(&fh->video_q , data, count, ppos,
+ file->f_flags & O_NONBLOCK);
+ if (ret != 0) {
+ video_end(fh, file);
+ } else {
+ ret = video_end(fh, file);
+ }
+out:
+ /* restart overlay if it was active before */
+ if (vv->ov_suspend != NULL) {
+ saa7146_start_preview(vv->ov_suspend);
+ vv->ov_suspend = NULL;
+ }
+
+ return ret;
+}
+
+struct saa7146_use_ops saa7146_video_uops = {
+ .init = video_init,
+ .open = video_open,
+ .release = video_close,
+ .irq_done = video_irq_done,
+ .read = video_read,
+};