Thankyou very much for your quick answers. I searched now in the linux sources for the problem and I think I could find it in the file linux-source-3.16/drivers/tty/serial/8250/8250_pci.c There is a function serial_pci_guessboard and a blacklist including the vendor- and device-ids of 3 softmodems and 2 multi-io cards. I think if the vendor id 0x10e8 (standard AMCC) and device id 0x8226 could be inserted into that blacklist I could load our driver and get the software for our MPA-3 multiparameter system working. It seems that these id's are not really used by any existing serial card, but this guessboard function anyway takes our card as a serial board. Is this a matter of the Debian distribution or the general linux kernel? Best regards, Wolfgang Wilhelm Betreff: Re: problem with "serial" driver in kernel 3.16.0 An: Wolfgang Wilhelm <wilhelm@xxxxxxxxxxxxxx>, stable@xxxxxxxxxxxxxxx Kopie an: linux-kernel@xxxxxxxxxxxxxxx Von: Austin S Hemmelgarn <ahferroin7@xxxxxxxxx> Datum: Thu, 17 Sep 2015 16:03:52 -0400 On 2015-09-17 09:24, Wolfgang Wilhelm wrote: > We are a small company FAST ComTec GmbH > (www.fastcomtec.com) and produce multichannel analyzers > with Windows software. I am the software developer and > would like to get our software working also under Linux > with the help of WINE. Before I go any further, I would like to thank you for even considering this option. If there were more vendors who tried this, Linux would have much better support for quite a large number of hardware devices. > I was already successfull with our USB devices and most > of our PCI cards, but with one of the PCI cards > it does not work (in Debian v8, kernel 3.16.0). > > Our PCI cards have a AMCC controller S5933, we use the > standard AMCC vendor id 0x10e8 and device id 0x8226, > device class serial. Most of our cards use two I/O port ranges > and an interrupt. I have written a linux driver for these cards > and could get everything working, but the interface card > for our MPA-3 multiparameter system uses only > one I/O port range and an interrupt. This card is recognized > by the "serial" driver in the kernel as a serial interface card > and there is no way to load our own driver. > > My question is, could you remove in future kernel versions > the support for this card in the kernel our make it possible > to blacklist it in /etc/modprobe.d/fbdev-blacklist.conf > like other drivers that are not directly included in the kernel? Removal is probably not an option (if there is a kernel driver for the chip already, there are almost certainly other drivers that use this chip). As far as blacklisting goes, that would be something to take up with the distribution you are developing for (so Debian from what you've said), although you may not get much help there either if the driver isn't open source. In general, it's better to either get your driver in the kernel at the source code level (which in turn includes help with ABI updates on the kernel side), or find some way to write it entirely in userspace (I'd suggest lucking at either the VFIO subsystem or the older userspace driver framework for this). -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html