[src/trunk]: src/sys/arch/hp300/dev Send break signal to reset keyboard state...

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

details:   https://anonhg.NetBSD.org/src/rev/96ed414428d8
branches:  trunk
changeset: 352305:96ed414428d8
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sat Mar 25 01:48:31 2017 +0000

description:
Send break signal to reset keyboard state before keyboard probe.

Now Apollo Domain keyboard is probed properly even after
any keys are typed before boot (i.e. on bootloader prompt).

Tested on 425e and A1630-82001 keyboard
(that were contributed by Miod Vallat).

diffstat:

 sys/arch/hp300/dev/dnkbd.c |  27 ++++++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diffs (55 lines):

diff -r dcf7f3db26ce -r 96ed414428d8 sys/arch/hp300/dev/dnkbd.c
--- a/sys/arch/hp300/dev/dnkbd.c        Sat Mar 25 01:39:20 2017 +0000
+++ b/sys/arch/hp300/dev/dnkbd.c        Sat Mar 25 01:48:31 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dnkbd.c,v 1.7 2014/04/24 12:10:27 tsutsui Exp $        */
+/*     $NetBSD: dnkbd.c,v 1.8 2017/03/25 01:48:31 tsutsui Exp $        */
 /*     $OpenBSD: dnkbd.c,v 1.17 2009/07/23 21:05:56 blambert Exp $     */
 
 /*
@@ -263,6 +263,7 @@
 static void    dnkbd_rawrepeat(void *);
 #endif
 static int     dnkbd_send(struct dnkbd_softc *, const uint8_t *, size_t);
+static void    dnkbd_break(struct dnkbd_softc *, int);
 
 int
 dnkbd_match(device_t parent, cfdata_t cf, void *aux)
@@ -309,6 +310,12 @@
 
        frodo_intr_establish(parent, dnkbd_intr, sc, fa->fa_line, IPL_VM);
 
+       /* send break to reset keyboard state */
+       dnkbd_break(sc, 1);
+       delay(10 * 1000);       /* 10ms for 12 space bits */
+       dnkbd_break(sc, 0);
+       delay(10 * 1000);
+
        /* probe for keyboard */
        if (dnkbd_probe(sc) != 0) {
                aprint_normal("no keyboard\n");
@@ -869,6 +876,24 @@
        return 0;
 }
 
+void
+dnkbd_break(struct dnkbd_softc *sc, int onoff)
+{
+       bus_space_tag_t bst;
+       bus_space_handle_t bsh;
+       uint8_t reg;
+
+       bst = sc->sc_bst;
+       bsh = sc->sc_bsh;
+
+       reg = bus_space_read_1(bst, bsh, com_lctl);
+       if (onoff)
+               reg |= LCR_SBREAK;
+       else
+               reg &= ~LCR_SBREAK;
+       bus_space_write_1(bst, bsh, com_lctl, reg);
+}
+
 int
 dnkbd_intr(void *v)
 {