On Tue, Feb 04, 2003 at 09:37:30AM +0100, Thomas Jarosch wrote: > > > I want to implement a special ioctl (enable "bit bang" mode) > > > for the ftdi_sio usb-serial driver. > > > > Are you sure there's nothing in the 60+ different tty ioctls in the > > kernel that would work for you? > > My problem is: What do all these short names mean? > Is there somewhere a table describing their function?
I've tried to document the "common" ones in a linux journal article a few months ago. But for the others, you'll just have to dig through the code, both kernel, and userspace programs. > > And why do you want to implement such an ioctl, why would the user care about > > something like this (meaning, why doesn't the driver "just work" for the user.) > > Newer versions of the FTDI chipset support a special mode: bit bang. > You can read about it here: > http://www.ftdichip.com/Documents/AN232-01_BitBang.pdf > > Many people on the ftdi_sio mailinglist where asking for it, > and I also need it for a lot of machines (we'll be using this chip > to drive a vfd display for a linux appliance) It looks like this mode does not even look like a serial device anymore. I'd recommend just using libusb to talk to the device to use this new functionality (and to send new firmware to the device), that way you don't have to mess with kernel programming at all. Hope this helps, greg k-h ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
