path: root/Documentation/networking/3c505.txt
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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/networking/3c505.txt
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+The 3Com Etherlink Plus (3c505) driver.
+This driver now uses DMA. There is currently no support for PIO operation.
+The default DMA channel is 6; this is _not_ autoprobed, so you must
+make sure you configure it correctly. If loading the driver as a
+module, you can do this with "modprobe 3c505 dma=n". If the driver is
+linked statically into the kernel, you must either use an "ether="
+statement on the command line, or change the definition of ELP_DMA in 3c505.h.
+The driver will warn you if it has to fall back on the compiled in
+default DMA channel.
+If no base address is given at boot time, the driver will autoprobe
+ports 0x300, 0x280 and 0x310 (in that order). If no IRQ is given, the driver
+will try to probe for it.
+The driver can be used as a loadable module. See net-modules.txt for details
+of the parameters it can take.
+Theoretically, one instance of the driver can now run multiple cards,
+in the standard way (when loading a module, say "modprobe 3c505
+io=0x300,0x340 irq=10,11 dma=6,7" or whatever). I have not tested
+this, though.
+The driver may now support revision 2 hardware; the dependency on
+being able to read the host control register has been removed. This
+is also untested, since I don't have a suitable card.
+Known problems:
+ I still see "DMA upload timed out" messages from time to time. These
+seem to be fairly non-fatal though.
+ The card is old and slow.
+To do:
+ Improve probe/setup code
+ Test multicast and promiscuous operation
+ The driver is mainly written by Craig Southeren, email
+ <craigs@ineluki.apana.org.au>.
+ Parts of the driver (adapting the driver to 1.1.4+ kernels,
+ IRQ/address detection, some changes) and this README by
+ Juha Laiho <jlaiho@ichaos.nullnet.fi>.
+ DMA mode, more fixes, etc, by Philip Blundell <pjb27@cam.ac.uk>
+ Multicard support, Software configurable DMA, etc., by
+ Christopher Collins <ccollins@pcug.org.au>