Provided by: linux-doc-2.6.15_2.6.15-23.39_all
mca_write_pos - read POS register from card
void mca_write_pos (int slot, int reg, unsigned char byte);
slot slot number to read from
reg register to read from
byte byte to write to the POS registers
Store a POS value directly from the hardware. You should not normally
need to use this function and should have a very good knowledge of MCA
bus before you do so. Doing this wrongly can damage the hardware.
This function may not be used from interrupt context.
Note that this a technically a Bad Thing, as IBM tech stuff says you
should only set POS values through their utilities. However, some
devices such as the 3c523 recommend that you write back some data to
make sure the configuration is consistent. I’d say that IBM is right,
but I like my drivers to work.
This function can’t do checks to see if multiple devices end up with
the same resources, so you might see magic smoke if someone screws up.
Alan Cox <email@example.com>, David Weinehall, Chris Beauregard.