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The 3Com Etherlink Plus (3c505) driver.
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This driver now uses DMA. There is currently no support for PIO operation.
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The default DMA channel is 6; this is _not_ autoprobed, so you must
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make sure you configure it correctly. If loading the driver as a
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module, you can do this with "modprobe 3c505 dma=n". If the driver is
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linked statically into the kernel, you must either use an "ether="
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statement on the command line, or change the definition of ELP_DMA in 3c505.h.
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The driver will warn you if it has to fall back on the compiled in
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default DMA channel.
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If no base address is given at boot time, the driver will autoprobe
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ports 0x300, 0x280 and 0x310 (in that order). If no IRQ is given, the driver
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will try to probe for it.
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The driver can be used as a loadable module.
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Theoretically, one instance of the driver can now run multiple cards,
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in the standard way (when loading a module, say "modprobe 3c505
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io=0x300,0x340 irq=10,11 dma=6,7" or whatever). I have not tested
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this, though.
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The driver may now support revision 2 hardware; the dependency on
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being able to read the host control register has been removed. This
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is also untested, since I don't have a suitable card.
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Known problems:
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I still see "DMA upload timed out" messages from time to time. These
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seem to be fairly non-fatal though.
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The card is old and slow.
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To do:
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Improve probe/setup code
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Test multicast and promiscuous operation
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Authors:
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The driver is mainly written by Craig Southeren, email
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<craigs@ineluki.apana.org.au>.
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Parts of the driver (adapting the driver to 1.1.4+ kernels,
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IRQ/address detection, some changes) and this README by
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Juha Laiho <jlaiho@ichaos.nullnet.fi>.
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DMA mode, more fixes, etc, by Philip Blundell <pjb27@cam.ac.uk>
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Multicard support, Software configurable DMA, etc., by
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Christopher Collins <ccollins@pcug.org.au>
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