shithub: riscv

Download patch

ref: e56affb840a369ccca365ce6f0c83a55b99224bc
parent: 0e242236bada9266fb4d71912edad87c099ba96f
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Thu Jan 2 02:44:17 EST 2014 

ps2mouse: disable packet streaming during reprogramming

sometimes, ps2 mouse setup failed on thinkpads during boot. disabling
packet streaming while we program the mouse seems to fix the issue.


--- a/sys/src/9/pc/devkbd.c
+++ b/sys/src/9/pc/devkbd.c
@@ -164,10 +164,7 @@
 {
 	unsigned int c;
 	int tries;
-	static int badkbd;
 
-	if(badkbd)
-		return -1;
 	c = 0;
 	tries = 0;
 
@@ -191,7 +188,6 @@
 
 	if(c != 0xFA){
 		print("i8042: %2.2ux returned to the %2.2ux command\n", c, cmd);
-		badkbd = 1;	/* don't keep trying; there might not be one */
 		return -1;
 	}
 	return 0;
--- a/sys/src/9/pc/mouse.c
+++ b/sys/src/9/pc/mouse.c
@@ -165,9 +165,7 @@
 		return;
 
 	i8042auxenable(ps2mouseputc);
-	/* make mouse streaming, enabled */
-	i8042auxcmd(0xEA);
-	i8042auxcmd(0xF4);
+	i8042auxcmd(0xEA);	/* set stream mode */
 
 	mousetype = MousePS2;
 	packetsize = 3;
@@ -255,11 +253,20 @@
 		i8042auxcmd(0xEA);	/* streaming */
 		i8042auxcmd(0xE8);	/* set resolution */
 		i8042auxcmd(3);
-		i8042auxcmd(0xF4);	/* enabled */
 		break;
 	}
 }
 
+static void
+setstream(int on)
+{
+	switch(mousetype){
+	case MousePS2:
+		i8042auxcmd(on ? 0xF4 : 0xF5);
+		break;
+	}
+}
+
 void
 mousectl(Cmdbuf *cb)
 {
@@ -274,27 +281,37 @@
 	ct = lookupcmd(cb, mousectlmsg, nelem(mousectlmsg));
 	switch(ct->index){
 	case CMaccelerated:
+		setstream(0);
 		setaccelerated(cb->nf == 1 ? 1 : atoi(cb->f[1]));
+		setstream(1);
 		break;
 	case CMintellimouse:
+		setstream(0);
 		setintellimouse();
+		setstream(1);
 		break;
 	case CMlinear:
+		setstream(0);
 		setlinear();
+		setstream(1);
 		break;
 	case CMps2:
 		intellimouse = 0;
 		ps2mouse();
+		setstream(1);
 		break;
 	case CMps2intellimouse:
 		ps2mouse();
 		setintellimouse();
+		setstream(1);
 		break;
 	case CMres:
+		setstream(0);
 		if(cb->nf >= 2)
 			setres(atoi(cb->f[1]));
 		else
 			setres(1);
+		setstream(1);
 		break;
 	case CMreset:
 		resetmouse();
@@ -304,6 +321,7 @@
 			setres(resolution);
 		if(intellimouse)
 			setintellimouse();
+		setstream(1);
 		break;
 	case CMserial:
 		if(mousetype == Mouseserial)
-- 
⑨