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| 1 | The 3Com Etherlink Plus (3c505) driver. | ||
| 2 | |||
| 3 | This driver now uses DMA. There is currently no support for PIO operation. | ||
| 4 | The default DMA channel is 6; this is _not_ autoprobed, so you must | ||
| 5 | make sure you configure it correctly. If loading the driver as a | ||
| 6 | module, you can do this with "modprobe 3c505 dma=n". If the driver is | ||
| 7 | linked statically into the kernel, you must either use an "ether=" | ||
| 8 | statement on the command line, or change the definition of ELP_DMA in 3c505.h. | ||
| 9 | |||
| 10 | The driver will warn you if it has to fall back on the compiled in | ||
| 11 | default DMA channel. | ||
| 12 | |||
| 13 | If no base address is given at boot time, the driver will autoprobe | ||
| 14 | ports 0x300, 0x280 and 0x310 (in that order). If no IRQ is given, the driver | ||
| 15 | will try to probe for it. | ||
| 16 | |||
| 17 | The driver can be used as a loadable module. | ||
| 18 | |||
| 19 | Theoretically, one instance of the driver can now run multiple cards, | ||
| 20 | in the standard way (when loading a module, say "modprobe 3c505 | ||
| 21 | io=0x300,0x340 irq=10,11 dma=6,7" or whatever). I have not tested | ||
| 22 | this, though. | ||
| 23 | |||
| 24 | The driver may now support revision 2 hardware; the dependency on | ||
| 25 | being able to read the host control register has been removed. This | ||
| 26 | is also untested, since I don't have a suitable card. | ||
| 27 | |||
| 28 | Known problems: | ||
| 29 | I still see "DMA upload timed out" messages from time to time. These | ||
| 30 | seem to be fairly non-fatal though. | ||
| 31 | The card is old and slow. | ||
| 32 | |||
| 33 | To do: | ||
| 34 | Improve probe/setup code | ||
| 35 | Test multicast and promiscuous operation | ||
| 36 | |||
| 37 | Authors: | ||
| 38 | The driver is mainly written by Craig Southeren, email | ||
| 39 | <craigs@ineluki.apana.org.au>. | ||
| 40 | Parts of the driver (adapting the driver to 1.1.4+ kernels, | ||
| 41 | IRQ/address detection, some changes) and this README by | ||
| 42 | Juha Laiho <jlaiho@ichaos.nullnet.fi>. | ||
| 43 | DMA mode, more fixes, etc, by Philip Blundell <pjb27@cam.ac.uk> | ||
| 44 | Multicard support, Software configurable DMA, etc., by | ||
| 45 | Christopher Collins <ccollins@pcug.org.au> | ||