From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 15 May 1999 13:11:07 -0400
From: Dave Presotto presotto@plan9.bell-labs.com
Subject: [9fans] intellimouse
Topicbox-Message-UUID: 96783dce-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19990515171107.C9cdcanCAB6lO0oI7Ci7hBZktYftkNVAX9vFm4zMDIk@z>

If anyone cares, we got an intellimouse working as a PS2 3 button mouse
on brazil.  The setup code follows.  It's cleaner than in the plan 9
release since we've stuck the dance with the i8042 into a separate routine.

int
i8042auxcmd(int cmd)
{
	unsigned int c;
	int tries;

	c = 0;
	tries = 0;

	ilock(&i8042lock);
	do{
		if(tries++ > 2)
			break;
		if(outready() < 0)
			break;
		outb(Cmd, 0xD4);
		if(outready() < 0)
			break;
		outb(Data, cmd);
		if(outready() < 0)
			break;
		if(inready() < 0)
			break;
		c = inb(Data);
	} while(c == 0xFE || c == 0);
	iunlock(&i8042lock);

	if(c != 0xFA){
		print("i8042: %2.2ux returned to the %2.2ux command\n", c, cmd);
		return -1;
	}
	return 0;
}


/*
 *  set up a ps2 mouse
 */
static void
ps2mouse(void)
{
	if(mousetype == MousePS2)
		return;

	i8042auxenable(ps2mouseputc);
	/* make mouse streaming, enabled */
	i8042auxcmd(0xEA);
	i8042auxcmd(0xF4);

	mousetype = MousePS2;
}


static void
setintellimouse(void)
{
	intellimouse = 1;
	switch(mousetype){
	case MousePS2:
		i8042auxcmd(0xF3);	/* set sample */
		i8042auxcmd(0xC8);
		i8042auxcmd(0xF3);	/* set sample */
		i8042auxcmd(0x64);
		i8042auxcmd(0xF3);	/* set sample */
		i8042auxcmd(0x50);
		break;
	}
}

and in mousectl()

	...

	} else if(strcmp(field[0], "ps2") == 0){
		ps2mouse();
	} else if(strcmp(field[0], "ps2intellimouse") == 0){
		ps2mouse();
		setintellimouse();

	...

Cheers.