We're using a CF card in TrueIDE mode, on a board with u-boot and MPC8541E.

A CPLD maps the CF bus (only the signals needed for IDE mode) into MPC's memory map; this makes the "IDE physical" interface. UPM machines are used for the accesses timing. 2 chipselects are also used, one for the "normal" register file and another for the "alternative register file".

u-boot's "ide" command is used; it was only changed in the register access routines, because of different address calculation and endianess.

You have to be careful when interfacing the CF card (or any IDE device) with the MPCs. Keep in mind that register 0 (the data register) is accessed at address 0 and is 16 bit wide; the remaining registers are accessed in the next consecutive addresses (1, 2, ...), but are 8 bit wide.

Best Regards

-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Yogi Sent: quinta-feira, 20 de Abril de 2006 23:36 Subject: [U-Boot-Users] MPC83xx: CF in True IDE mode

Is there support for CF access in true IDE mode for 83xx with Reiser File system ?