From 04a607a6851ecfe2865fd453a631a1c6288d1167 Mon Sep 17 00:00:00 2001
From: Ulf Brosziewski <bru@cvs.openbsd.org>
Date: Mon, 19 Aug 2019 21:19:39 +0000
Subject: Add a configuration option for reverse scrolling.

ok patrick@
---
 sys/dev/wscons/wsconsio.h     |  6 ++++--
 sys/dev/wscons/wsmouse.c      | 25 +++++++++++++++++++------
 sys/dev/wscons/wsmouseinput.h |  3 ++-
 3 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/sys/dev/wscons/wsconsio.h b/sys/dev/wscons/wsconsio.h
index d7942ac9238..442bd4542ae 100644
--- a/sys/dev/wscons/wsconsio.h
+++ b/sys/dev/wscons/wsconsio.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: wsconsio.h,v 1.91 2019/03/24 17:55:39 bru Exp $ */
+/* $OpenBSD: wsconsio.h,v 1.92 2019/08/19 21:19:38 bru Exp $ */
 /* $NetBSD: wsconsio.h,v 1.74 2005/04/28 07:15:44 martin Exp $ */
 
 /*
@@ -292,6 +292,8 @@ enum wsmousecfg {
 	WSMOUSECFG_SWAPXY,	/* swap X- and Y-axis */
 	WSMOUSECFG_X_INV,	/* map absolute coordinate X to (INV - X) */
 	WSMOUSECFG_Y_INV,	/* map absolute coordinate Y to (INV - Y) */
+	WSMOUSECFG_REVERSE_SCROLLING,
+				/* reverse scroll directions */
 
 	/*
 	 * Coordinate handling, applying only in WSMOUSE_COMPAT  mode.
@@ -343,7 +345,7 @@ enum wsmousecfg {
 	WSMOUSECFG_LOG_INPUT = 256,
 	WSMOUSECFG_LOG_EVENTS,
 };
-#define WSMOUSECFG_MAX	38	/* max size of param array per ioctl */
+#define WSMOUSECFG_MAX	39	/* max size of param array per ioctl */
 
 struct wsmouse_param {
 	enum wsmousecfg key;
diff --git a/sys/dev/wscons/wsmouse.c b/sys/dev/wscons/wsmouse.c
index 585b0733f89..97a086d7115 100644
--- a/sys/dev/wscons/wsmouse.c
+++ b/sys/dev/wscons/wsmouse.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: wsmouse.c,v 1.56 2019/08/08 02:19:18 cheloha Exp $ */
+/* $OpenBSD: wsmouse.c,v 1.57 2019/08/19 21:19:38 bru Exp $ */
 /* $NetBSD: wsmouse.c,v 1.35 2005/02/27 00:27:52 perry Exp $ */
 
 /*
@@ -1018,7 +1018,7 @@ wsmouse_motion_sync(struct wsmouseinput *input, struct evq_access *evq)
 	struct motion_state *motion = &input->motion;
 	struct axis_filter *h = &input->filter.h;
 	struct axis_filter *v = &input->filter.v;
-	int x, y, dx, dy;
+	int x, y, dx, dy, dz, dw;
 
 	if (motion->sync & SYNC_DELTAS) {
 		dx = h->inv ? -motion->dx : motion->dx;
@@ -1032,16 +1032,20 @@ wsmouse_motion_sync(struct wsmouseinput *input, struct evq_access *evq)
 		if (dy)
 			wsmouse_evq_put(evq, DELTA_Y_EV(input), dy);
 		if (motion->dz) {
+			dz = (input->flags & REVERSE_SCROLLING)
+			    ? -motion->dz : motion->dz;
 			if (IS_TOUCHPAD(input))
-				wsmouse_evq_put(evq, VSCROLL_EV, motion->dz);
+				wsmouse_evq_put(evq, VSCROLL_EV, dz);
 			else
-				wsmouse_evq_put(evq, DELTA_Z_EV, motion->dz);
+				wsmouse_evq_put(evq, DELTA_Z_EV, dz);
 		}
 		if (motion->dw) {
+			dw = (input->flags & REVERSE_SCROLLING)
+			    ? -motion->dw : motion->dw;
 			if (IS_TOUCHPAD(input))
-				wsmouse_evq_put(evq, HSCROLL_EV, motion->dw);
+				wsmouse_evq_put(evq, HSCROLL_EV, dw);
 			else
-				wsmouse_evq_put(evq, DELTA_W_EV, motion->dw);
+				wsmouse_evq_put(evq, DELTA_W_EV, dw);
 		}
 	}
 	if (motion->sync & SYNC_POSITION) {
@@ -1471,6 +1475,9 @@ wsmouse_get_params(struct device *sc,
 		case WSMOUSECFG_Y_INV:
 			params[i].value = input->filter.v.inv;
 			break;
+		case WSMOUSECFG_REVERSE_SCROLLING:
+			params[i].value = !!(input->flags & REVERSE_SCROLLING);
+			break;
 		case WSMOUSECFG_DX_MAX:
 			params[i].value = input->filter.h.dmax;
 			break;
@@ -1561,6 +1568,12 @@ wsmouse_set_params(struct device *sc,
 		case WSMOUSECFG_Y_INV:
 			input->filter.v.inv = val;
 			break;
+		case WSMOUSECFG_REVERSE_SCROLLING:
+			if (val)
+				input->flags |= REVERSE_SCROLLING;
+			else
+				input->flags &= ~REVERSE_SCROLLING;
+			break;
 		case WSMOUSECFG_DX_MAX:
 			input->filter.h.dmax = val;
 			break;
diff --git a/sys/dev/wscons/wsmouseinput.h b/sys/dev/wscons/wsmouseinput.h
index 2a337ceb8c1..5cba98ce4a8 100644
--- a/sys/dev/wscons/wsmouseinput.h
+++ b/sys/dev/wscons/wsmouseinput.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: wsmouseinput.h,v 1.13 2019/03/24 18:04:02 bru Exp $ */
+/* $OpenBSD: wsmouseinput.h,v 1.14 2019/08/19 21:19:38 bru Exp $ */
 
 /*
  * Copyright (c) 2015, 2016 Ulf Brosziewski
@@ -161,6 +161,7 @@ struct wsmouseinput {
 #define TPAD_COMPAT_MODE	(1 << 0)
 #define TPAD_NATIVE_MODE	(1 << 1)
 #define MT_TRACKING		(1 << 2)
+#define REVERSE_SCROLLING	(1 << 3)
 #define RESYNC			(1 << 16)
 #define TRACK_INTERVAL		(1 << 17)
 #define CONFIGURED		(1 << 18)
-- 
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