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authorAntonio Ospite <ospite@studenti.unina.it>2008-11-14 07:53:32 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-29 17:53:38 -0200
commitdff369aad6407e7b123e239e9ea2f552299cf74c (patch)
tree77376354bc9240a5b871854302dc93dcb0be5999
parent6270330abea2d9556583d597bb78d64b291aa6ba (diff)
V4L/DVB (9682): gspca: New subdriver parameter 'bulk_nurbs'.
Some webcams with image transfer by bulk messages accept one or many permanent bulk read. Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/video/gspca/gspca.c19
-rw-r--r--drivers/media/video/gspca/gspca.h4
2 files changed, 19 insertions, 4 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 02d6a48ad1b..a9a4a5fe4b1 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -203,6 +203,7 @@ static void bulk_irq(struct urb *urb
{
struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
struct gspca_frame *frame;
+ int st;
PDEBUG(D_PACK, "bulk irq");
if (!gspca_dev->streaming)
@@ -226,6 +227,13 @@ static void bulk_irq(struct urb *urb
urb->transfer_buffer,
urb->actual_length);
}
+
+ /* resubmit the URB */
+ if (gspca_dev->cam.bulk_nurbs != 0) {
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
+ }
}
/*
@@ -523,11 +531,14 @@ static int create_urbs(struct gspca_dev *gspca_dev,
nurbs = DEF_NURBS;
} else { /* bulk */
npkt = 0;
- bsize = gspca_dev->cam. bulk_size;
+ bsize = gspca_dev->cam.bulk_size;
if (bsize == 0)
bsize = psize;
PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
- nurbs = 1;
+ if (gspca_dev->cam.bulk_nurbs != 0)
+ nurbs = gspca_dev->cam.bulk_nurbs;
+ else
+ nurbs = 1;
}
gspca_dev->nurbs = nurbs;
@@ -615,8 +626,8 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
gspca_dev->streaming = 1;
atomic_set(&gspca_dev->nevent, 0);
- /* bulk transfers are started by the subdriver */
- if (gspca_dev->alt == 0)
+ /* some bulk transfers are started by the subdriver */
+ if (gspca_dev->alt == 0 && gspca_dev->cam.bulk_nurbs == 0)
break;
/* submit the URBs */
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 50913caf187..4ff9b8105f0 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -58,6 +58,10 @@ struct cam {
int bulk_size; /* buffer size when image transfer by bulk */
struct v4l2_pix_format *cam_mode; /* size nmodes */
char nmodes;
+ __u8 bulk_nurbs; /* number of URBs in bulk mode
+ * - cannot be > MAX_NURBS
+ * - when 0 and bulk_size != 0 means
+ * 1 URB and submit done by subdriver */
__u8 epaddr;
};