Hi Martyn, On Fri, Dec 27, 2013 at 4:23 PM, Martyn Welch <martyn@xxxxxxxxxxxx> wrote: > On 27/12/13 20:15, Michael Kenney wrote: >> >> We are using the vme_tsi148 bridge driver along with the vme_user >> driver to access the VME boards. The A/D board requires D32 bus cycles >> and the VME master window is configured accordingly, however, when >> monitoring the bus cycles with a logic analyzer, we noticed that the >> CPU is transferring one byte at a time (i.e. four D8 transfers rather >> than one D32). >> >> Is this the expected behavior of the tsi148 driver? >> > > Hi Mike, > > This is certainly not the expected behaviour - if the window is configured > for D32 then it should do 32 bit transfers where possible. > > I've heard of this happening recently, but haven't yet been able to > replicate it. Which VME board are you running Linux on and which flavour of > Linux? I'm running Debian 7.2 with kernel 3.2 on a Fastwel CPC600 (Pentium M based CPU board). --Mike _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
