Correct initialization of Bt458, used in LUNA's 8bpp frame buffer.

According to the manual, the address register does not automatically
increment when we access to the control registers.  Also we disable
overlay planes, because we do not use them.

This diff should be one of preliminaries for upcoming colored wscons on
luna88k.

ok miod@

diff --git a/sys/arch/luna88k/dev/lunafb.c b/sys/arch/luna88k/dev/lunafb.c
index 6f2de42..61b4b2a 100644 (file)
--- a/sys/arch/luna88k/dev/lunafb.c
+++ b/sys/arch/luna88k/dev/lunafb.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: lunafb.c,v 1.17 2013/10/21 10:36:15 miod Exp $ */
+/* $OpenBSD: lunafb.c,v 1.18 2013/12/30 07:33:40 aoyama Exp $ */
 /* $NetBSD: lunafb.c,v 1.7.6.1 2002/08/07 01:48:34 lukem Exp $ */
 
 /*-
@@ -464,13 +464,16 @@ omfb_getdevconfig(paddr, dc)
        } else if (hwplanebits == 8) {
                struct bt458 *ndac = (struct bt458 *)OMFB_RAMDAC;
 
-#if 0          /* This doesn't work.  Don't touch ROM setting for now. */
+               /* Initialize the Bt458 */
                ndac->bt_addr = 0x04;
                ndac->bt_ctrl = 0xff; /* all planes will be read */
+               ndac->bt_addr = 0x05;
                ndac->bt_ctrl = 0x00; /* all planes have non-blink */
-               ndac->bt_ctrl = 0x43; /* pallete enabled, ovly plane */
+               ndac->bt_addr = 0x06;
+               ndac->bt_ctrl = 0x40; /* palette enabled, ovly plane disabled */
+               ndac->bt_addr = 0x07;
                ndac->bt_ctrl = 0x00; /* no test mode */
-#endif
+
                ndac->bt_addr = 0;
                ndac->bt_cmap = 0;
                ndac->bt_cmap = 0;