[src/trunk]: src/sys/dev/sbus 8bit tcx doesn't implement a hardware cursor, s...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ae64d788d93a
branches:  trunk
changeset: 330026:ae64d788d93a
user:      macallan <macallan%NetBSD.org@localhost>
date:      Wed Jun 18 04:54:09 2014 +0000

description:
8bit tcx doesn't implement a hardware cursor, so don't pretend it does.
Also, avoid poking the hw cursor registers in that case. Real hardware doesn't
care but qemu does.

diffstat:

 sys/dev/sbus/tcx.c |  30 +++++++++++++++++++++++-------
 1 files changed, 23 insertions(+), 7 deletions(-)

diffs (87 lines):

diff -r a3381a947092 -r ae64d788d93a sys/dev/sbus/tcx.c
--- a/sys/dev/sbus/tcx.c        Wed Jun 18 01:19:19 2014 +0000
+++ b/sys/dev/sbus/tcx.c        Wed Jun 18 04:54:09 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tcx.c,v 1.50 2014/06/17 14:25:17 macallan Exp $ */
+/*     $NetBSD: tcx.c,v 1.51 2014/06/18 04:54:09 macallan Exp $ */
 
 /*
  *  Copyright (c) 1996, 1998, 2009 The NetBSD Foundation, Inc.
@@ -38,7 +38,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tcx.c,v 1.50 2014/06/17 14:25:17 macallan Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcx.c,v 1.51 2014/06/18 04:54:09 macallan Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -378,7 +378,9 @@
        }
        tcx_loadcmap(sc, 0, 256);
 
-       tcx_set_cursor(sc);
+       if (!sc->sc_8bit)
+           tcx_set_cursor(sc);
+
        /* enable video */
        confreg = bus_space_read_4(sa->sa_bustag, sc->sc_thc, THC_MISC);
        confreg |= THC_MISC_VIDEN;
@@ -755,8 +757,12 @@
                                                tcx_clearscreen(sc, 3);
                                }
                        }
+                       return 0;
+
                case WSDISPLAYIO_GCURPOS:
-                       {
+                       if (sc->sc_8bit) {
+                               return EOPNOTSUPP;
+                       } else {
                                struct wsdisplay_curpos *cp = (void *)data;
 
                                cp->x = sc->sc_cursor_x;
@@ -765,7 +771,9 @@
                        return 0;
 
                case WSDISPLAYIO_SCURPOS:
-                       {
+                       if (sc->sc_8bit) {
+                               return EOPNOTSUPP;
+                       } else {
                                struct wsdisplay_curpos *cp = (void *)data;
 
                                sc->sc_cursor_x = cp->x;
@@ -775,7 +783,9 @@
                        return 0;
 
                case WSDISPLAYIO_GCURMAX:
-                       {
+                       if (sc->sc_8bit) {
+                               return EOPNOTSUPP;
+                       } else {
                                struct wsdisplay_curpos *cp = (void *)data;
 
                                cp->x = 32;
@@ -784,7 +794,9 @@
                        return 0;
 
                case WSDISPLAYIO_SCURSOR:
-                       {
+                       if (sc->sc_8bit) {
+                               return EOPNOTSUPP;
+                       } else {
                                struct wsdisplay_cursor *cursor = (void *)data;
 
                                return tcx_do_cursor(sc, cursor);
@@ -1074,6 +1086,10 @@
 static int
 tcx_do_cursor(struct tcx_softc *sc, struct wsdisplay_cursor *cur)
 {
+       if (sc->sc_8bit) {
+               /* hw cursor is not implemented on tcx */
+               return -1;
+       }
        if (cur->which & WSDISPLAY_CURSOR_DOCUR) {
 
                if (cur->enable) {