| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. See net-modules.txt for details |
| 18 | of the parameters it can take. |
| 19 | |
| 20 | Theoretically, one instance of the driver can now run multiple cards, |
| 21 | in the standard way (when loading a module, say "modprobe 3c505 |
| 22 | io=0x300,0x340 irq=10,11 dma=6,7" or whatever). I have not tested |
| 23 | this, though. |
| 24 | |
| 25 | The driver may now support revision 2 hardware; the dependency on |
| 26 | being able to read the host control register has been removed. This |
| 27 | is also untested, since I don't have a suitable card. |
| 28 | |
| 29 | Known problems: |
| 30 | I still see "DMA upload timed out" messages from time to time. These |
| 31 | seem to be fairly non-fatal though. |
| 32 | The card is old and slow. |
| 33 | |
| 34 | To do: |
| 35 | Improve probe/setup code |
| 36 | Test multicast and promiscuous operation |
| 37 | |
| 38 | Authors: |
| 39 | The driver is mainly written by Craig Southeren, email |
| 40 | <craigs@ineluki.apana.org.au>. |
| 41 | Parts of the driver (adapting the driver to 1.1.4+ kernels, |
| 42 | IRQ/address detection, some changes) and this README by |
| 43 | Juha Laiho <jlaiho@ichaos.nullnet.fi>. |
| 44 | DMA mode, more fixes, etc, by Philip Blundell <pjb27@cam.ac.uk> |
| 45 | Multicard support, Software configurable DMA, etc., by |
| 46 | Christopher Collins <ccollins@pcug.org.au> |