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+$Id: README.hysdn,v 1.3.6.1 2001/02/10 14:41:19 kai Exp $
+The hysdn driver has been written by
+by Werner Cornelius (werner@isdn4linux.de or werner@titro.de) 
+for Hypercope GmbH Aachen Germany. Hypercope agreed to publish this driver
+under the GNU General Public License.
+
+The CAPI 2.0-support was added by Ulrich Albrecht (ualbrecht@hypercope.de)
+for Hypercope GmbH Aachen, Germany.
+
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+Table of contents
+=================
+
+1. About the driver
+
+2. Loading/Unloading the driver
+
+3. Entries in the /proc filesystem
+
+4. The /proc/net/hysdn/cardconfX file
+
+5. The /proc/net/hysdn/cardlogX file
+
+6. Where to get additional info and help
+
+
+1. About the driver
+
+   The drivers/isdn/hysdn subdir contains a driver for HYPERCOPEs active 
+   PCI isdn cards Champ, Ergo and Metro. To enable support for this cards
+   enable ISDN support in the kernel config and support for HYSDN cards in
+   the active cards submenu. The driver may only be compiled and used if 
+   support for loadable modules and the process filesystem have been enabled.
+
+   These cards provide two different interfaces to the kernel. Without the
+   optional CAPI 2.0 support, they register as ethernet card. IP-routing
+   to a ISDN-destination is performed on the card itself. All necessary
+   handlers for various protocols like ppp and others as well as config info
+   and firmware may be fetched from Hypercopes WWW-Site www.hypercope.de.
+
+   With CAPI 2.0 support enabled, the card can also be used as a CAPI 2.0 
+   compliant devices with either CAPI 2.0 applications 
+   (check isdn4k-utils) or -using the capidrv module- as a regular
+   isdn4linux device. This is done via the same mechanism as with the 
+   active AVM cards and in fact uses the same module.
+   
+
+2. Loading/Unloading the driver
+
+   The module has no command line parameters and auto detects up to 10 cards
+   in the id-range 0-9.
+   If a loaded driver shall be unloaded all open files in the /proc/net/hysdn
+   subdir need to be closed and all ethernet interfaces allocated by this 
+   driver must be shut down. Otherwise the module counter will avoid a module
+   unload.
+   
+   If you are using the CAPI 2.0-interface, make sure to load/modprobe the
+   kernelcapi-module first.
+
+   If you plan to use the capidrv-link to isdn4linux, make sure to load
+   capidrv.o after all modules using this driver (i.e. after hysdn and
+   any avm-specific modules).
+
+3. Entries in the /proc filesystem
+
+   When the module has been loaded it adds the directory hysdn in the 
+   /proc/net tree. This directory contains exactly 2 file entries for each 
+   card. One is called cardconfX and the other cardlogX, where X is the
+   card id number from 0 to 9. 
+   The cards are numbered in the order found in the PCI config data.
+
+4. The /proc/net/hysdn/cardconfX file
+
+   This file may be read to get by everyone to get info about the cards type, 
+   actual state, available features and used resources.
+   The first 3 entries (id, bus and slot) are PCI info fields, the following
+   type field gives the information about the cards type:
+
+   4 -> Ergo card (server card with 2 b-chans)
+   5 -> Metro card (server card with 4 or 8 b-chans)
+   6 -> Champ card (client card with 2 b-chans)   
+
+   The following 3 fields show the hardware assignments for irq, iobase and the
+   dual ported memory (dp-mem).
+   The fields b-chans and fax-chans announce the available card resources of
+   this types for the user.
+   The state variable indicates the actual drivers state for this card with the
+   following assignments.
+
+   0 -> card has not been booted since driver load
+   1 -> card booting is actually in progess
+   2 -> card is in an error state due to a previous boot failure
+   3 -> card is booted and active
+
+   And the last field (device) shows the name of the ethernet device assigned
+   to this card. Up to the first successful boot this field only shows a -
+   to tell that no net device has been allocated up to now. Once a net device
+   has been allocated it remains assigned to this card, even if a card is
+   rebooted and an boot error occurs. 
+
+   Writing to the cardconfX file boots the card or transfers config lines to 
+   the cards firmware. The type of data is automatically detected when the 
+   first data is written. Only root has write access to this file.
+   The firmware boot files are normally called hyclient.pof for client cards
+   and hyserver.pof for server cards.
+   After successfully writing the boot file, complete config files or single
+   config lines may be copied to this file.
+   If an error occurs the return value given to the writing process has the 
+   following additional codes (decimal):
+
+   1000 Another process is currently bootng the card
+   1001 Invalid firmware header
+   1002 Boards dual-port RAM test failed
+   1003 Internal firmware handler error
+   1004 Boot image size invalid
+   1005 First boot stage (bootstrap loader) failed
+   1006 Second boot stage failure
+   1007 Timeout waiting for card ready during boot
+   1008 Operation only allowed in booted state
+   1009 Config line too long 
+   1010 Invalid channel number 
+   1011 Timeout sending config data
+
+   Additional info about error reasons may be fetched from the log output. 
+
+5. The /proc/net/hysdn/cardlogX file
+          
+   The cardlogX file entry may be opened multiple for reading by everyone to 
+   get the cards and drivers log data. Card messages always start with the
+   keyword LOG. All other lines are output from the driver. 
+   The driver log data may be redirected to the syslog by selecting the 
+   appropriate bitmask. The cards log messages will always be send to this
+   interface but never to the syslog.
+
+   A root user may write a decimal or hex (with 0x) value t this file to select
+   desired output options. As mentioned above the cards log dat is always 
+   written to the cardlog file independent of the following options only used
+   to check and debug the driver itself:
+
+   For example: 
+   echo "0x34560078" > /proc/net/hysdn/cardlog0
+   to output the hex log mask 34560078 for card 0.
+ 
+   The written value is regarded as an unsigned 32-Bit value, bit ored for 
+   desired output. The following bits are already assigned:
+
+   0x80000000   All driver log data is alternatively via syslog 
+   0x00000001   Log memory allocation errors
+   0x00000010   Firmware load start and close are logged
+   0x00000020   Log firmware record parser
+   0x00000040   Log every firmware write actions
+   0x00000080   Log all card related boot messages
+   0x00000100   Output all config data sent for debugging purposes
+   0x00000200   Only non comment config lines are shown wth channel
+   0x00000400   Additional conf log output
+   0x00001000   Log the asynchronous scheduler actions (config and log)
+   0x00100000   Log all open and close actions to /proc/net/hysdn/card files
+   0x00200000   Log all actions from /proc file entries
+   0x00010000   Log network interface init and deinit
+   
+6. Where to get additional info and help
+
+   If you have any problems concerning the driver or configuration contact 
+   the Hypercope support team (support@hypercope.de) and or the authors
+   Werner Cornelius (werner@isdn4linux or cornelius@titro.de) or
+   Ulrich Albrecht (ualbrecht@hypercope.de).
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