With r70.. dmesg output on load (modprobe r5u870 debug=1)

[  387.308000] Linux video capture interface: v2.00
[  387.336000] usbcam: registering driver r5u870 0.11.1SVN
[  387.336000] r5u870-0: Detected HP Pavilion Webcam (UVC - NO FW)
[  387.336000] r5u870-0: Found format 1: YUYV (5 frames)
[  387.336000] r5u870-0: Found resolution 1: 640x480 ival 416666
(14745600 B/s)
[  387.336000] r5u870-0: Found resolution 2: 352x288 ival 416666
(4866048 B/s)
[  387.336000] r5u870-0: Found resolution 3: 320x240 ival 416666
(3686400 B/s)
[  387.336000] r5u870-0: Found resolution 4: 176x144 ival 416666
(1216512 B/s)
[  387.336000] r5u870-0: Found resolution 5: 160x120 ival 416666
(921600 B/s)
[  387.336000] r5u870-0: Found UVC control Hue [-180,180] def:0 info:03
[  387.340000] r5u870-0: control "Hue" id=9963779 already defined
[  387.340000] r5u870-0: Vendor control setup failed: -12
[  387.340000] r5u870-0: minidriver init failed: -12
[  387.340000] r5u870: probe of 2-4:1.0 failed with error -12
[  387.340000] usbcore: registered new interface driver r5u870

/dev/video0 not created. Cannot launch any tv app.