NetBSD-5.0.2/sys/dev/ofw/ofrtc.c
/* $NetBSD: ofrtc.c,v 1.20 2006/09/13 07:14:36 gdamore Exp $ */
/*
* Copyright (C) 1996 Wolfgang Solfrank.
* Copyright (C) 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright 1997
* Digital Equipment Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and conditions.
* Subject to these conditions, you may download, copy, install,
* use, modify and distribute this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions as
* they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Digital Equipment Corporation. Neither the "Digital Equipment
* Corporation" name nor any trademark or logo of Digital Equipment
* Corporation may be used to endorse or promote products derived
* from this software without the prior written permission of
* Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied
* warranties, including but not limited to, any implied warranties
* of merchantability, fitness for a particular purpose, or
* non-infringement are disclaimed. In no event shall DIGITAL be
* liable for any damages whatsoever, and in particular, DIGITAL
* shall not be liable for special, indirect, consequential, or
* incidental damages or damages for lost profits, loss of
* revenue or loss of use, whether such damages arise in contract,
* negligence, tort, under statute, in equity, at law or otherwise,
* even if advised of the possibility of such damage.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofrtc.c,v 1.20 2006/09/13 07:14:36 gdamore Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/event.h>
#include <dev/clock_subr.h>
#include <dev/ofw/openfirm.h>
#define OFRTC_SEC 0
#define OFRTC_MIN 1
#define OFRTC_HR 2
#define OFRTC_DOM 3
#define OFRTC_MON 4
#define OFRTC_YR 5
struct ofrtc_softc {
struct device sc_dev;
int sc_phandle;
int sc_ihandle;
struct todr_chip_handle sc_todr;
};
static int ofrtc_match(struct device *, struct cfdata *, void *);
static void ofrtc_attach(struct device *, struct device *, void *);
static int ofrtc_gettod(todr_chip_handle_t, struct clock_ymdhms *);
static int ofrtc_settod(todr_chip_handle_t, struct clock_ymdhms *);
CFATTACH_DECL(ofrtc, sizeof(struct ofrtc_softc),
ofrtc_match, ofrtc_attach, NULL, NULL);
static int
ofrtc_match(struct device *parent, struct cfdata *match, void *aux)
{
struct ofbus_attach_args *oba = aux;
char type[8];
int l;
if (strcmp(oba->oba_busname, "ofw"))
return (0);
if ((l = OF_getprop(oba->oba_phandle, "device_type", type,
sizeof type - 1)) < 0 ||
l >= sizeof type)
return 0;
/* ensure null termination */
type[l] = 0;
return !strcmp(type, "rtc");
}
static void
ofrtc_attach(struct device *parent, struct device *self, void *aux)
{
struct ofrtc_softc *of = device_private(self);
struct ofbus_attach_args *oba = aux;
char name[32];
char path[256];
int l;
of->sc_phandle = oba->oba_phandle;
of->sc_ihandle = 0;
if ((l = OF_getprop(of->sc_phandle, "name", name,
sizeof name - 1)) < 0)
panic("Device without name?");
if (l >= sizeof name)
l = sizeof name - 1;
name[l] = 0;
if (!of->sc_ihandle) {
if ((l = OF_package_to_path(of->sc_phandle, path,
sizeof path - 1)) < 0 ||
l >= sizeof path) {
aprint_error(": cannot determine package path\n");
return;
}
path[l] = 0;
if (!(of->sc_ihandle = OF_open(path))) {
aprint_error(": cannot open path\n");
return;
}
}
of->sc_todr.todr_gettime_ymdhms = ofrtc_gettod;
of->sc_todr.todr_settime_ymdhms = ofrtc_settod;
of->sc_todr.cookie = of;
todr_attach(&of->sc_todr);
printf(": %s\n", name);
}
int
ofrtc_gettod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct ofrtc_softc *of = tch->cookie;
int date[6];
/*
* We mostly ignore the suggested time and go for the RTC clock time
* stored in the CMOS RAM. If the time can't be obtained from the
* CMOS, or if the time obtained from the CMOS is 5 or more years
* less than the suggested time, we used the suggested time. (In
* the latter case, it's likely that the CMOS battery has died.)
*/
if (OF_call_method("get-time", of->sc_ihandle, 0, 6,
date, date + 1, date + 2, date + 3, date + 4, date + 5)) {
return EIO;
}
dt->dt_sec = date[OFRTC_SEC];
dt->dt_min = date[OFRTC_MIN];
dt->dt_hour = date[OFRTC_HR];
dt->dt_day = date[OFRTC_DOM];
dt->dt_mon = date[OFRTC_MON];
dt->dt_year = date[OFRTC_YR];
return 0;
}
int
ofrtc_settod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct ofrtc_softc *of = tch->cookie;
int sec, minute, hr, dom, mon, yr;
sec = dt->dt_sec;
minute = dt->dt_min;
hr = dt->dt_hour;
dom = dt->dt_day;
mon = dt->dt_mon;
yr = dt->dt_year;
if (OF_call_method("set-time", of->sc_ihandle, 6, 0,
sec, minute, hr, dom, mon, yr))
return EIO;
return 0;
}