Re: OXuPCI952 and baud_base questions

[Greg KH <greg@kroah.com>]

On Wed, Dec 01, 2010 at 05:46:34PM +0100, Matthias Reichl wrote:
> I've got a Lindy 51237 multi I/O card (2 16C950 URATs up to 921kbit
> plus one parallel port) with a Oxford OXuPCI952 chip (PCI vendor
> ID 0x1415, device ID 0x9505).
> 
> http://www.lindy-international.com/2-port-rs-232-serial-1-port-parallel-card-pci/51237.html
> http://www.plxtech.com/products/uart/oxupci952
> 
> Kernel 2.6.36.1 doesn't contain any device-specific configuration,
> the "guess code" detects both UARTs at BAR0 and BAR1,
> but with the wrong baudrate (default of 115200 instead of
> 921600 needed for this card).
> 
> The card doesn't report any specific (sub-) vendor/device IDs but
> the generic Oxford IDs. So adding an entry to the pci_device_id
> table with a pbn_b0_bt_2_921600 config might break some prior
> working setups (OXuPCI952 with baud_base=115200).
> 
> Do you have any policy how to cope with such situations?

Always set the baud rate to a valid one before using the tty port?

thanks,

greg k-h