mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 03:55:09 +08:00
1da177e4c3
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!
249 lines
9.8 KiB
Plaintext
249 lines
9.8 KiB
Plaintext
|
|
COMX drivers for the 2.2 kernel
|
|
|
|
Originally written by: Tivadar Szemethy, <tiv@itc.hu>
|
|
Currently maintained by: Gergely Madarasz <gorgo@itc.hu>
|
|
|
|
Last change: 21/06/1999.
|
|
|
|
INTRODUCTION
|
|
|
|
This document describes the software drivers and their use for the
|
|
COMX line of synchronous serial adapters for Linux version 2.2.0 and
|
|
above.
|
|
The cards are produced and sold by ITC-Pro Ltd. Budapest, Hungary
|
|
For further info contact <info@itc.hu>
|
|
or http://www.itc.hu (mostly in Hungarian).
|
|
The firmware files and software are available from ftp://ftp.itc.hu
|
|
|
|
Currently, the drivers support the following cards and protocols:
|
|
|
|
COMX (2x64 kbps intelligent board)
|
|
CMX (1x256 + 1x128 kbps intelligent board)
|
|
HiCOMX (2x2Mbps intelligent board)
|
|
LoCOMX (1x512 kbps passive board)
|
|
MixCOM (1x512 or 2x512kbps passive board with a hardware watchdog an
|
|
optional BRI interface and optional flashROM (1-32M))
|
|
SliceCOM (1x2Mbps channelized E1 board)
|
|
PciCOM (X21)
|
|
|
|
At the moment of writing this document, the (Cisco)-HDLC, LAPB, SyncPPP and
|
|
Frame Relay (DTE, rfc1294 IP encapsulation with partially implemented Q933a
|
|
LMI) protocols are available as link-level protocol.
|
|
X.25 support is being worked on.
|
|
|
|
USAGE
|
|
|
|
Load the comx.o module and the hardware-specific and protocol-specific
|
|
modules you'll need into the running kernel using the insmod utility.
|
|
This creates the /proc/comx directory.
|
|
See the example scripts in the 'etc' directory.
|
|
|
|
/proc INTERFACE INTRO
|
|
|
|
The COMX driver set has a new type of user interface based on the /proc
|
|
filesystem which eliminates the need for external user-land software doing
|
|
IOCTL calls.
|
|
Each network interface or device (i.e. those ones you configure with 'ifconfig'
|
|
and 'route' etc.) has a corresponding directory under /proc/comx. You can
|
|
dynamically create a new interface by saying 'mkdir /proc/comx/comx0' (or you
|
|
can name it whatever you want up to 8 characters long, comx[n] is just a
|
|
convention).
|
|
Generally the files contained in these directories are text files, which can
|
|
be viewed by 'cat filename' and you can write a string to such a file by
|
|
saying 'echo _string_ >filename'. This is very similar to the sysctl interface.
|
|
Don't use a text editor to edit these files, always use 'echo' (or 'cat'
|
|
where appropriate).
|
|
When you've created the comx[n] directory, two files are created automagically
|
|
in it: 'boardtype' and 'protocol'. You have to fill in these files correctly
|
|
for your board and protocol you intend to use (see the board and protocol
|
|
descriptions in this file below or the example scripts in the 'etc' directory).
|
|
After filling in these files, other files will appear in the directory for
|
|
setting the various hardware- and protocol-related informations (for example
|
|
irq and io addresses, keepalive values etc.) These files are set to default
|
|
values upon creation, so you don't necessarily have to change all of them.
|
|
|
|
When you're ready with filling in the files in the comx[n] directory, you can
|
|
configure the corresponding network interface with the standard network
|
|
configuration utilities. If you're unable to bring the interfaces up, look up
|
|
the various kernel log files on your system, and consult the messages for
|
|
a probable reason.
|
|
|
|
EXAMPLE
|
|
|
|
To create the interface 'comx0' which is the first channel of a COMX card:
|
|
|
|
insmod comx
|
|
# insmod comx-hw-comx ; insmod comx-proto-ppp (these are usually
|
|
autoloaded if you use the kernel module loader)
|
|
|
|
mkdir /proc/comx/comx0
|
|
echo comx >/proc/comx/comx0/boardtype
|
|
echo 0x360 >/proc/comx/comx0/io <- jumper-selectable I/O port
|
|
echo 0x0a >/proc/comx/comx0/irq <- jumper-selectable IRQ line
|
|
echo 0xd000 >/proc/comx/comx0/memaddr <- software-configurable memory
|
|
address. COMX uses 64 KB, and this
|
|
can be: 0xa000, 0xb000, 0xc000,
|
|
0xd000, 0xe000. Avoid conflicts
|
|
with other hardware.
|
|
cat </etc/siol1.rom >/proc/comx/comx0/firmware <- the firmware for the card
|
|
echo HDLC >/proc/comx/comx0/protocol <- the data-link protocol
|
|
echo 10 >/proc/comx/comx0/keepalive <- the keepalive for the protocol
|
|
ifconfig comx0 1.2.3.4 pointopoint 5.6.7.8 netmask 255.255.255.255 <-
|
|
finally configure it with ifconfig
|
|
Check its status:
|
|
cat /proc/comx/comx0/status
|
|
|
|
If you want to use the second channel of this board:
|
|
|
|
mkdir /proc/comx/comx1
|
|
echo comx >/proc/comx/comx1/boardtype
|
|
echo 0x360 >/proc/comx/comx1/io
|
|
echo 10 >/proc/comx/comx1/irq
|
|
echo 0xd000 >/proc/comx/comx1/memaddr
|
|
echo 1 >/proc/comx/comx1/channel <- channels are numbered
|
|
as 0 (default) and 1
|
|
|
|
Now, check if the driver recognized that you're going to use the other
|
|
channel of the same adapter:
|
|
|
|
cat /proc/comx/comx0/twin
|
|
comx1
|
|
cat /proc/comx/comx1/twin
|
|
comx0
|
|
|
|
You don't have to load the firmware twice, if you use both channels of
|
|
an adapter, just write it into the channel 0's /proc firmware file.
|
|
|
|
Default values: io 0x360 for COMX, 0x320 (HICOMX), irq 10, memaddr 0xd0000
|
|
|
|
THE LOCOMX HARDWARE DRIVER
|
|
|
|
The LoCOMX driver doesn't require firmware, and it doesn't use memory either,
|
|
but it uses DMA channels 1 and 3. You can set the clock rate (if enabled by
|
|
jumpers on the board) by writing the kbps value into the file named 'clock'.
|
|
Set it to 'external' (it is the default) if you have external clock source.
|
|
|
|
(Note: currently the LoCOMX driver does not support the internal clock)
|
|
|
|
THE COMX, CMX AND HICOMX DRIVERS
|
|
|
|
On the HICOMX, COMX and CMX, you have to load the firmware (it is different for
|
|
the three cards!). All these adapters can share the same memory
|
|
address (we usually use 0xd0000). On the CMX you can set the internal
|
|
clock rate (if enabled by jumpers on the small adapter boards) by writing
|
|
the kbps value into the 'clock' file. You have to do this before initializing
|
|
the card. If you use both HICOMX and CMX/COMX cards, initialize the HICOMX
|
|
first. The I/O address of the HICOMX board is not configurable by any
|
|
method available to the user: it is hardwired to 0x320, and if you have to
|
|
change it, consult ITC-Pro Ltd.
|
|
|
|
THE MIXCOM DRIVER
|
|
|
|
The MixCOM board doesn't require firmware, the driver communicates with
|
|
it through I/O ports. You can have three of these cards in one machine.
|
|
|
|
THE SLICECOM DRIVER
|
|
|
|
The SliceCOM board doesn't require firmware. You can have 4 of these cards
|
|
in one machine. The driver doesn't (yet) support shared interrupts, so
|
|
you will need a separate IRQ line for every board.
|
|
Read Documentation/networking/slicecom.txt for help on configuring
|
|
this adapter.
|
|
|
|
THE HDLC/PPP LINE PROTOCOL DRIVER
|
|
|
|
The HDLC/SyncPPP line protocol driver uses the kernel's built-in syncppp
|
|
driver (syncppp.o). You don't have to manually select syncppp.o when building
|
|
the kernel, the dependencies compile it in automatically.
|
|
|
|
|
|
|
|
|
|
EXAMPLE
|
|
(setting up hw parameters, see above)
|
|
|
|
# using HDLC:
|
|
echo hdlc >/proc/comx/comx0/protocol
|
|
echo 10 >/proc/comx/comx0/keepalive <- not necessary, 10 is the default
|
|
ifconfig comx0 1.2.3.4 pointopoint 5.6.7.8 netmask 255.255.255.255
|
|
|
|
(setting up hw parameters, see above)
|
|
|
|
# using PPP:
|
|
echo ppp >/proc/comx/comx0/protocol
|
|
ifconfig comx0 up
|
|
ifconfig comx0 1.2.3.4 pointopoint 5.6.7.8 netmask 255.255.255.255
|
|
|
|
|
|
THE LAPB LINE PROTOCOL DRIVER
|
|
|
|
For this, you'll need to configure LAPB support (See 'LAPB Data Link Driver' in
|
|
'Network options' section) into your kernel (thanks to Jonathan Naylor for his
|
|
excellent implementation).
|
|
comx-proto-lapb.o provides the following files in the appropriate directory
|
|
(the default values in parens): t1 (5), t2 (1), n2 (20), mode (DTE, STD) and
|
|
window (7). Agree with the administrator of your peer router on these
|
|
settings (most people use defaults, but you have to know if you are DTE or
|
|
DCE).
|
|
|
|
EXAMPLE
|
|
|
|
(setting up hw parameters, see above)
|
|
echo lapb >/proc/comx/comx0/protocol
|
|
echo dce >/proc/comx/comx0/mode <- DCE interface in this example
|
|
ifconfig comx0 1.2.3.4 pointopoint 5.6.7.8 netmask 255.255.255.255
|
|
|
|
|
|
THE FRAME RELAY PROTOCOL DRIVER
|
|
|
|
You DON'T need any other frame relay related modules from the kernel to use
|
|
COMX-Frame Relay. This protocol is a bit more complicated than the others,
|
|
because it allows to use 'subinterfaces' or DLCIs within one physical device.
|
|
First you have to create the 'master' device (the actual physical interface)
|
|
as you would do for other protocols. Specify 'frad' as protocol type.
|
|
Now you can bring this interface up by saying 'ifconfig comx0 up' (or whatever
|
|
you've named the interface). Do not assign any IP address to this interface
|
|
and do not set any routes through it.
|
|
Then, set up your DLCIs the following way: create a comx interface for each
|
|
DLCI you intend to use (with mkdir), and write 'dlci' to the 'boardtype' file,
|
|
and 'ietf-ip' to the 'protocol' file. Currently, the only supported
|
|
encapsulation type is this (also called as RFC1294/1490 IP encapsulation).
|
|
Write the DLCI number to the 'dlci' file, and write the name of the physical
|
|
COMX device to the file called 'master'.
|
|
Now you can assign an IP address to this interface and set routes using it.
|
|
See the example file for further info and example config script.
|
|
Notes: this driver implements a DTE interface with partially implemented
|
|
Q933a LMI.
|
|
You can find an extensively commented example in the 'etc' directory.
|
|
|
|
FURTHER /proc FILES
|
|
|
|
boardtype:
|
|
Type of the hardware. Valid values are:
|
|
'comx', 'hicomx', 'locomx', 'cmx', 'slicecom'.
|
|
|
|
protocol:
|
|
Data-link protocol on this channel. Can be: HDLC, LAPB, PPP, FRAD
|
|
|
|
status:
|
|
You can read the channel's actual status from the 'status' file, for example
|
|
'cat /proc/comx/comx3/status'.
|
|
|
|
lineup_delay:
|
|
Interpreted in seconds (default is 1). Used to avoid line jitter: the system
|
|
will consider the line status 'UP' only if it is up for at least this number
|
|
of seconds.
|
|
|
|
debug:
|
|
You can set various debug options through this file. Valid options are:
|
|
'comx_events', 'comx_tx', 'comx_rx', 'hw_events', 'hw_tx', 'hw_rx'.
|
|
You can enable a debug options by writing its name prepended by a '+' into
|
|
the debug file, for example 'echo +comx_rx >comx0/debug'.
|
|
Disabling an option happens similarly, use the '-' prefix
|
|
(e.g. 'echo -hw_rx >debug').
|
|
Debug results can be read from the debug file, for example:
|
|
tail -f /proc/comx/comx2/debug
|
|
|
|
|