M$ IntelliMouse support

1 files changed, 41 insertions, 4 deletions

diff --git a/sys/arch/i386/isa/pms.c b/sys/arch/i386/isa/pms.c
index f0f376ccbe8..18997ff763a 100644
--- a/sys/arch/i386/isa/pms.c
+++ b/sys/arch/i386/isa/pms.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pms.c,v 1.15 1997/05/30 19:51:27 deraadt Exp $	*/
+/*	$OpenBSD: pms.c,v 1.16 1997/08/29 22:40:16 kstailey Exp $	*/
 /*	$NetBSD: pms.c,v 1.29 1996/05/12 23:12:42 mycroft Exp $	*/
 
 /*-
@@ -229,6 +229,23 @@ pmsattach(parent, self, aux)
 
 	sc->sc_ih = isa_intr_establish(ic, irq, IST_EDGE, IPL_TTY,
 	    pmsintr, sc, sc->sc_dev.dv_xname);
+
+#ifdef INTELLIMOUSE
+	/* The Micro$oft IntelliMouse has a wheel that you can turn or
+	 * click stuck in between the left and right buttons.
+	 * By default this mouse acts like a two-button PS/2 mouse.
+	 * If you set the sampling rate to 200, then 100, then 80
+	 * it changes to a 4-byte-per-packet format and the wheel
+	 * acts like a middle button if you click it.  Turing the
+	 * wheel modifies the fourth byte in the packet.
+	 */
+	pms_dev_cmd(PMS_SET_SAMPLE);
+	pms_dev_cmd(200);	/* 200 samples/sec */
+	pms_dev_cmd(PMS_SET_SAMPLE);
+	pms_dev_cmd(100);	/* 100 samples/sec */
+	pms_dev_cmd(PMS_SET_SAMPLE);
+	pms_dev_cmd(80);	/* 80 samples/sec */
+#endif
 }
 
 int
@@ -446,12 +463,16 @@ pmsintr(arg)
 		case 2:
 			dy = inb(PMS_DATA);
 			dy = (dy == -128) ? -127 : dy;
+#ifdef INTELLIMOUSE
+			++state;
+#else
 			state = 0;
-
+#endif
 			buttons = ((buttons & PS2LBUTMASK) << 2) |
 			  	((buttons & (PS2RBUTMASK | PS2MBUTMASK)) >> 1);
 			changed = ((buttons ^ sc->sc_status) & BUTSTATMASK) << 3;
-			sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
+			sc->sc_status = buttons |
+			    (sc->sc_status & ~BUTSTATMASK) | changed;
 
 			if (dx || dy || changed) {
 				/* Update accumulated movements. */
@@ -473,6 +494,12 @@ pmsintr(arg)
 			}
 
 			break;
+#ifdef INTELLIMOUSE		/* discard fourth "wheel" byte */
+		case 3:
+			state = 0;
+			inb(PMS_DATA);
+			break;
+#endif
 		}
 	} else {
 		/* read data port */
@@ -494,12 +521,17 @@ pmsintr(arg)
 		case 2:
 			dy = buffer[0];
 			dy = (dy == -128) ? -127 : dy;
+#ifdef INTELLIMOUSE
+			++state;
+#else
 			state = 0;
+#endif
 
 			buttons = ((buttons & PS2LBUTMASK) << 2) |
 			  	((buttons & (PS2RBUTMASK | PS2MBUTMASK)) >> 1);
 			changed = ((buttons ^ sc->sc_status) & BUTSTATMASK) << 3;
-			sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
+			sc->sc_status = buttons |
+			    (sc->sc_status & ~BUTSTATMASK) | changed;
 
 			if (dx || dy || changed) {
 				/* Update accumulated movements. */
@@ -507,6 +539,11 @@ pmsintr(arg)
 				sc->sc_y += dy;
 			}
 			break;
+#ifdef INTELLIMOUSE		/* discard fourth "wheel" byte */
+		case 3:
+			state = 0;
+			return 0; /* XXX 0? -1? */
+#endif
 		}
 
 		/* add raw data to the queue. */