changes

PC watch dog driver

ChangeLog pcwd
-----------------
1.42 (26/07/02)
	- Added an extra spinlock variable for io operations only (David Chambers)
	- to try to prevent deadlocks. Changed io operations to use this lock 
		(David Chambers)
	- Explicitly initialize spinlock_t pcwd_lock (David Chambers)
	- indeted propperly for kernel submission

1.41 (11/06/02)
    - fixed dumb compile time error when used as direct kernel driver 
		(also found by Martin Josefson)
	- made CONFIG_WATCHDOG_NOWAYOUT a module parameter
	- fixed a bug in case enabling/disabling the board failed
	- full IOCTL support to be more compatible with other watchdog drivers
	- reorganized some spinlocks
	- separated possible /dev/watchdog and /dev/temperature operations:
		now /dev/temperature can only be read and /dev/watchdog only written

1.40 (18/12/01)
    - drop kernel < 2.4 support and all wrappers

1.39 (18/12/01) [last kernel 2.2 compaible version]
    - code reformat
    - fixed bug in ISA proc output; now more reliable
    - fixed Makefile for better 2.4 compatibility (Michael Ruder)
    - fixed isa card timeouts

1.38 (05/09/01)
    - corrected bug in /proc buffer calculation
    - new command 'tempoffset' (Olaf Christians)

1.37 (15/03/01)
	- forgot to initialize pcwd_lock (Martin Josefsson)
	- more spin_locks (Friedrich Lobenstock)
	- restore capability to compile directly into kernel somewhere lost in 1.35
	- tested with kernel 2.4.2 and 2.2.17 both as module and direct in kernel

1.36 (23/01/01)
	- code reformated to only use tabs to indent (Friedrich Lobenstock)
	- new command 'debug', separate ISA & PCI timout (Friedrich Lobenstock)
	- reset command has a 5 s delay (Friedrich Lobenstock)
	- new commands 'clear', 'relay 1noinvert', 'relay 1nvnoinvert'
														(Friedrich Lobenstock)
1.35 (22/01/01)
    - rerestored kernel 2.2 compatibility
    - include spin_lock locking

1.34 (19/01/01)
    - does not use globals to transport firmware revision (Friedrich Lobenstock)
    - use handshake for communication with PCI card  (Friedrich Lobenstock)
    - new commands 'relay 2notemp' and 'relay 2temp'  (Friedrich Lobenstock)
 
1.33 (16/01/01)
	- Firmware Version in global var
	- re-added minimal ioctl support
    - proc display of card timers
	
1.32 (11/26/00)
	- added PCI Wrapper for 2.4 compatibility
	- added udelay/mdelay wrapper
	- corrected delay values
	- implemented proc help command
	- arm command works on pci card
	- new nvarm command
	- timeout command works on pci card
	- new nvtimeout command
	- new command dio for digital I/O
	- new command relay

1.31 (06/10/00)
    - if a PCI Card is used then the arm and timeout do not work. excluded.
    - added kernel message classes
	- added pci support for kernel < 2.2 (untested)
	- added proc line Boot Status

1.30 (05/10/00)
    - bugfix /proc/pcwd entry not removed on module unload

1.29 (04/10/00)
    - more status messages
	- small bug in makefile <[e-mail]>
	- forgot to deregister temp_miscdev on unload
	- check failure of device register
    - reordered proc status lines

1.28 (25/07/00)
    - isa card works again
    - old isa temp bug corrected
	- small proc visual improvements
	- reboot notify handler installed
	- correct display of switch settings

1.27 (24/07/00)
    - pci code cleanup
    - display new pci card info: reset count, card status, digital_io
	
1.26 (22/07/00)
    - supports pci card version.
    - removed ioctl stuff completely. use /proc instead
	- do not use pcwd.h

1.25 (14/06/00)
	- bashed out a dumb bug in pcwd_ping causing a big drift in system clock
	- removed wdctl in favor of watchdog daemon

1.24 (15/11/99)
	- write only allowed as root user
	- try to restore kernel 2.0.x compaibility
	- tested with temp option card

1.23 (01/11/99)
	- rcs version displaying ugliness slaughtered
	- hardreset routine implemented
	- implemented /proc/pcwd user command interface; documented
	- fixed gcc warning for fops struct; forgot flush
	- IOCTL adapted to watchdog.h
	- Firmware > 1.20 arm and timeout features implemented

1.22 (31/10/99)
   	- implemented /dev/temperature
	- big code restructuring
	- file operations check for more error conditions
	- new Changes file

1.21 (30/10/99)
   	- code cleanup in /proc functions
	- use RCS
	- move wdctl control application in own directory
	- new Makefile
	- new INSTALL

1.20 (30/10/99) 
	- Changed version number to avoid confusion	
	- Added kernel 2.1.x compatibility

1.10.5 (10/08/98)
	- Modified to work with Rev C correct
	- Show SW3 Settings in /proc/pcwd
	- Deleted old WD_TEMP Code Fragments
	- Added Write to Device for Compatibility Reasons

1.10 
	- took over code from ken