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Add a power hook for the com device.

This commit is contained in:
perry 2006-06-25 00:39:21 +00:00
parent cc999a4878
commit 9c74364e5b
2 changed files with 36 additions and 3 deletions
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36
sys/dev/ic/com.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: com.c,v 1.244 2006/06/07 22:33:34 kardel Exp $ */
/* $NetBSD: com.c,v 1.245 2006/06/25 00:39:21 perry Exp $ */
/*-
* Copyright (c) 1998, 1999, 2004 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.244 2006/06/07 22:33:34 kardel Exp $");
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.245 2006/06/25 00:39:21 perry Exp $");
#include "opt_com.h"
#include "opt_ddb.h"
@ -157,6 +157,7 @@ void com_modem(struct com_softc *, int);
void tiocm_to_com(struct com_softc *, u_long, int);
int com_to_tiocm(struct com_softc *);
void com_iflush(struct com_softc *);
void com_power(int, void *);
int com_common_getc(dev_t, bus_space_tag_t, bus_space_handle_t);
void com_common_putc(dev_t, bus_space_tag_t, bus_space_handle_t, int);
@ -606,6 +607,11 @@ com_attach_subr(struct com_softc *sc)
com_config(sc);
sc->sc_powerhook = powerhook_establish(com_power, sc);
if (sc->sc_powerhook == NULL)
printf("%s: WARNING: unable to establish power hook\n",
sc->sc_dev.dv_xname);
SET(sc->sc_hwflags, COM_HW_DEV_OK);
}
@ -669,6 +675,9 @@ com_detach(struct device *self, int flags)
struct com_softc *sc = (struct com_softc *)self;
int maj, mn;
/* kill the power hook */
powerhook_disestablish(sc->sc_powerhook);
/* locate the major number */
maj = cdevsw_lookup_major(&com_cdevsw);
@ -2580,3 +2589,26 @@ com_is_console(bus_space_tag_t iot, bus_addr_t iobase, bus_space_handle_t *ioh)
*ioh = help;
return (1);
}
void
com_power(int why, void *arg)
{
struct com_softc *sc = arg;
int s;
s = splserial();
switch (why) {
case PWR_SUSPEND:
case PWR_STANDBY:
/* XXX should we do something to stop the device? */
break;
case PWR_RESUME:
com_loadchannelregs(sc);
break;
case PWR_SOFTSUSPEND:
case PWR_SOFTSTANDBY:
case PWR_SOFTRESUME:
break;
}
splx(s);
}

3
sys/dev/ic/comvar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: comvar.h,v 1.52 2006/06/07 22:33:35 kardel Exp $ */
/* $NetBSD: comvar.h,v 1.53 2006/06/25 00:39:21 perry Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
@ -151,6 +151,7 @@ struct com_softc {
#if NRND > 0 && defined(RND_COM)
rndsource_element_t rnd_source;
#endif
void *sc_powerhook; /* power management hook */
struct simplelock sc_lock;
};