/*
	reset_stinkpad_mouse.c

	Finally fixed the mouse stuck problem after suspend. How could this be
	so simple? ;-)

	This program fixes the (in)famous Thinkpad mouse stuck problem, which
	occurs after suspend. Keyboard works fine, but keyboard connected
	auxiliary mouse (the clit ;-) is jammed. Read days and days to find
	out the problem .. even had once my X on, but unfunctionable for days,
	because I did not want to reboot - my all projects (10s) and WWW
	environment (50+ pages) was on it. Finally surrended.

	Tab size is 4, as within all my code. Tabs are useful. 120 char wide page.

	@ arl // 2004 // (c) Linux/aow [www.aow.fi]
*/

#include	<fcntl.h>
#include	<stdio.h>
//#include	<linux/pc_keyb.h>			//	enable when pc_keyb.h is fixed.

/**
	Defining the name of this program.
*/

#define			MYNAME					"reset_stinkpad_mouse"

/**
	By default we use /dev/psaux.
*/

char *			psaux_device			=	"/dev/psaux";

/**
	Reset sequence/message to be sent psaux device i.e. written to it.
	<P>
	Please use always proper header file with its definitions and _not_
	try to invent the wheel again (and make the world more like spaghetti).
	OK - it should be like this, but some C coders really like to put
	everything into one single header file, and that everything needs
	other everything header files included (like pc_keyb.h). Please, please,
	use constants only header files for separating DEFINITIONS (constants) and
	FUNCTIONALITY (like structures).
	<P>
	Still trying to figure out the correct sequence of commands, and do we
	need to read AUX_ACKs? At least on my machine this still hangs keyboard,
	and I would like to avoid needed extra suspend cycle.
	<P>
	pc_keyb.h should naturally be named pc_keyboard.h or something better.
	Also AUX_ should be named KEYBOARD_AUXILIARY_DEVICE_, long words but
	saves thinking and acts as a document by itself. It took couple of
	days just to figure out the stupid namespace used.
*/

char 			psaux_initMessage []	=	
{
//	AUX_RESET,				//	0xFF	//	enable when pc_keyb.h is fixed.
	0xFF,								//	disable when pc_keyb.h is fixed.
//	AUX_ACK,				//	0xFA	//	enable when pc_keyb.h is fixed.
//	0xFA,								//	disable when pc_keyb.h is fixed.
};

int main( int argc, char **argv )
{
	int		psaux_port		=	open( psaux_device, O_RDWR );

	if ( psaux_port >= 0 )
	{
		int		wrote		=	write( psaux_port, psaux_initMessage,
			sizeof( psaux_initMessage ) );

		if ( wrote != sizeof( psaux_initMessage ) )
		{
			fprintf( stderr,
				MYNAME ": Failed to write to psaux (expecting:%d,wrote:%d)\n",
				sizeof( psaux_initMessage ), wrote );
			return( 1 );
		}
	}
	else
	{
		fprintf( stderr, MYNAME ": Failed to open psaux (no rights?)\n" );
		return( 2 );
	}

	return( 0 );
}

/* EOF */