From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- Documentation/networking/3c505.txt | 45 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/networking/3c505.txt (limited to 'Documentation/networking/3c505.txt') diff --git a/Documentation/networking/3c505.txt b/Documentation/networking/3c505.txt new file mode 100644 index 00000000..72f38b13 --- /dev/null +++ b/Documentation/networking/3c505.txt @@ -0,0 +1,45 @@ +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. + +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 + +Authors: + The driver is mainly written by Craig Southeren, email + . + Parts of the driver (adapting the driver to 1.1.4+ kernels, + IRQ/address detection, some changes) and this README by + Juha Laiho . + DMA mode, more fixes, etc, by Philip Blundell + Multicard support, Software configurable DMA, etc., by + Christopher Collins -- cgit v1.2.3