Reset the keyboard controller on resume, and also alert the children

(pckbd and pms) to do their part
started by mlarkin, cleaned up by me
ok miod

2 files changed, 23 insertions, 2 deletions

diff --git a/sys/dev/ic/pckbc.c b/sys/dev/ic/pckbc.c
index 8ec830ff8e1..710ff9138e0 100644
--- a/sys/dev/ic/pckbc.c
+++ b/sys/dev/ic/pckbc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pckbc.c,v 1.22 2010/07/21 20:10:17 miod Exp $ */
+/* $OpenBSD: pckbc.c,v 1.23 2010/07/22 14:27:44 deraadt Exp $ */
 /* $NetBSD: pckbc.c,v 1.5 2000/06/09 04:58:35 soda Exp $ */
 
 /*
@@ -759,6 +759,26 @@ pckbc_cleanup(self)
 }
 
 /*
+ * Reset the keyboard controller in a violent fashion; normally done
+ * after suspend/resume when we do not trust the machine.
+ */
+void
+pckbc_reset(struct pckbc_softc *sc)
+{
+	struct pckbc_internal *t = sc->id;
+	bus_space_tag_t iot = t->t_iot;
+	bus_space_handle_t ioh_d = t->t_ioh_d, ioh_c = t->t_ioh_c;
+
+	pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0);
+	/* KBC selftest */
+	if (pckbc_send_cmd(iot, ioh_c, KBC_SELFTEST) == 0)
+		return;
+	pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0);
+	(void)pckbc_put8042cmd(t);
+	pckbcintr_internal(t->t_sc->id, t->t_sc);
+}
+
+/*
  * Pass command to device during normal operation.
  * to be called at spltty()
  */
diff --git a/sys/dev/ic/pckbcvar.h b/sys/dev/ic/pckbcvar.h
index ec8cf9bff4d..0cf106b5980 100644
--- a/sys/dev/ic/pckbcvar.h
+++ b/sys/dev/ic/pckbcvar.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: pckbcvar.h,v 1.8 2010/07/21 20:10:17 miod Exp $ */
+/* $OpenBSD: pckbcvar.h,v 1.9 2010/07/22 14:27:44 deraadt Exp $ */
 /* $NetBSD: pckbcvar.h,v 1.4 2000/06/09 04:58:35 soda Exp $ */
 
 /*
@@ -109,6 +109,7 @@ void pckbc_attach(struct pckbc_softc *, int);
 int pckbc_cnattach(bus_space_tag_t, bus_addr_t, bus_size_t,
 			pckbc_slot_t, int);
 int pckbc_is_console(bus_space_tag_t, bus_addr_t);
+void pckbc_reset(struct pckbc_softc *);
 int pckbcintr(void *);
 
 /*