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Fixed MTP to work with TWRP

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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
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).