path: root/Documentation/video4linux/w9966.txt
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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/video4linux/w9966.txt
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!
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+W9966 Camera driver, written by Jakob Kemi (jakob.kemi@telia.com)
+After a lot of work in softice & wdasm, reading .pdf-files and tiresome
+trial-and-error work I've finally got everything to work. I needed vision for a
+robotics project so I borrowed this camera from a friend and started hacking.
+Anyway I've converted my original code from the AVR 8bit RISC C/ASM code into
+a working Linux driver.
+To get it working simply configure your kernel to support
+parport, ieee1284, video4linux and w9966
+If w9966 is statically linked it will always perform aggressive probing for
+the camera. If built as a module you'll have more configuration options.
+ modprobe w9966.o pardev=parport0(or whatever) parmode=0 (0=auto, 1=ecp, 2=epp)
+you can also type 'modinfo -p w9966.o' for option usage
+(or checkout w9966.c)
+The only thing to keep in mind is that the image format is in Y-U-Y-V format
+where every two pixels take 4 bytes. In SDL (www.libsdl.org) this format
+is called VIDEO_PALETTE_YUV422 (16 bpp).
+A minimal test application (with source) is available from:
+ http://hem.fyristorg.com/mogul/w9966.html
+The slow framerate is due to missing DMA ECP read support in the
+parport drivers. I might add working EPP support later.
+Good luck!
+ /Jakob Kemi