NetBSD/sys/dev/ofw/ofrtc.c

212 lines
5.3 KiB
C

/* $NetBSD: ofrtc.c,v 1.10 2001/11/13 07:26:28 lukem 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofrtc.c,v 1.10 2001/11/13 07:26:28 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <dev/ofw/openfirm.h>
cdev_decl(ofrtc_);
struct ofrtc_softc {
struct device sc_dev;
int sc_phandle;
int sc_ihandle;
};
static int ofrtc_match __P((struct device *, struct cfdata *, void *));
static void ofrtc_attach __P((struct device *, struct device *, void *));
struct cfattach ofrtc_ca = {
sizeof(struct ofrtc_softc), ofrtc_match, ofrtc_attach
};
extern struct cfdriver ofrtc_cd;
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;
return !strcmp(type, "rtc");
}
static void
ofrtc_attach(struct device *parent, struct device *self, void *aux)
{
struct ofrtc_softc *of = (void *)self;
struct ofbus_attach_args *oba = aux;
char name[32];
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;
printf(": %s\n", name);
}
int
ofrtc_open(dev_t dev, int flags, int fmt, struct proc *p)
{
struct ofrtc_softc *of;
int unit = minor(dev);
char path[256];
int l;
if (unit >= ofrtc_cd.cd_ndevs)
return ENXIO;
if (!(of = ofrtc_cd.cd_devs[unit]))
return ENXIO;
if (!of->sc_ihandle) {
if ((l = OF_package_to_path(of->sc_phandle, path,
sizeof path - 1)) < 0 ||
l >= sizeof path)
return ENXIO;
path[l] = 0;
if (!(of->sc_ihandle = OF_open(path))) {
if (of->sc_ihandle) {
OF_close(of->sc_ihandle);
of->sc_ihandle = 0;
}
return ENXIO;
}
}
return 0;
}
int
ofrtc_close(dev_t dev, int flags, int fmt, struct proc *p)
{
return 0;
}
static void
twodigit(char *bp, int i)
{
*bp++ = i / 10 + '0';
*bp = i % 10 + '0';
}
static int
twodigits(char *bp)
{
int i;
i = *bp++ - '0';
return i * 10 + *bp++ - '0';
}
int
ofrtc_read(dev_t dev, struct uio *uio, int flag)
{
struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)];
int date[6];
char buf[14];
int xlen;
if (uio->uio_offset >= sizeof buf)
return 0;
if (OF_call_method("get-time", of->sc_ihandle, 0, 6,
date, date + 1, date + 2,
date + 3, date + 4, date + 5))
return EIO;
twodigit(buf, date[5] % 100);
twodigit(buf + 2, date[4]);
twodigit(buf + 4, date[3]);
twodigit(buf + 6, date[2]);
twodigit(buf + 8, date[1]);
buf[10] = '.';
twodigit(buf + 11, date[0]);
buf[13] = '\n';
xlen = sizeof(buf) - uio->uio_offset;
if (xlen > uio->uio_resid)
xlen = uio->uio_resid;
return uiomove((caddr_t)buf, xlen, uio);
}
int
ofrtc_write(dev_t dev, struct uio *uio, int flag)
{
struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)];
char buf[14];
int cnt, year, error;
/*
* We require atomic updates!
*/
cnt = uio->uio_resid;
if (uio->uio_offset || (cnt != sizeof buf && cnt != sizeof buf - 1))
return EINVAL;
if ((error = uiomove((caddr_t)buf, sizeof buf, uio)) != 0)
return error;
if (cnt == sizeof buf && buf[sizeof buf - 1] != '\n')
return EINVAL;
year = twodigits(buf) + 1900;
if (year < 1970)
year += 100;
if (OF_call_method("set-time", of->sc_ihandle, 6, 0,
twodigits(buf + 11), twodigits(buf + 8), twodigits(buf + 6),
twodigits(buf + 4), twodigits(buf + 2), year))
return EIO;
return 0;
}