Re: [Etherboot-developers] Prism2 driver update?

[Michael B. <mb...@fe...>]

On Wed, 18 Sep 2002, Boris wrote:
> What was the prism2 driver derrived from? The linux kernel? If so,
> what version was it extracted from? I read that the linux driver has
> been updated because it had some allocation problems. Make we should
> take the latest linux driver and get that one working in etherboot.
> Just in case the older driver had problems [which even I had with
> larger then 20mb images].

It was taken from 2.4.18-6mdk (Mandrake 8.2 release), which I think
corresponds to linux-wlan-ng-0.1.13.  If you can point me towards the
relevant changelog message and patches for the Linux kernel, I'll try to
map them into the Etherboot driver.

The Etherboot Prism2 driver comprises three header files (hfa384x.h,
p80211hdr.h and wlan_compat.h), one main C file (prism2.c) and two wrapper
C files (prism2_pci.c and prism2_plx.c).  The header files were lifted
straight from the Linux kernel source without modifications, in order to
make it easier to upgrade them, so that's a simple job.  In prism2.c,
there are very few nontrivial routines:
  hfa384x_docmd_wait
  hfa384x_prepare_bap
  hfa384x_copy_from_bap
  hfa384x_copy_to_bap
  hfa384x_cmd_access
  hfa384x_drvr_getconfig
  hfa384x_drvr_setconfig
  hfa384x_wait_for_event
  prism2_poll
  prism2_transmit
most of which have direct equivalents in the Linux kernel source, so it
should be fairly straightforward to see which changes should be applied to
which routines.

Michael Brown
http://www.fensystems.co.uk