NetBSD-5.0.2/sys/arch/sparc64/dev/rtc.c
/* $NetBSD: rtc.c,v 1.5 2008/03/29 05:42:46 tsutsui Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1994 Gordon W. Ross
* Copyright (c) 1993 Adam Glass
* Copyright (c) 1996 Paul Kranenburg
* Copyright (c) 1996
* The President and Fellows of Harvard College. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Harvard University.
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 the University of
* California, Berkeley and its contributors.
* This product includes software developed by Paul Kranenburg.
* This product includes software developed by Harvard University.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*
* @(#)clock.c 8.1 (Berkeley) 6/11/93
* from: NetBSD: clock.c,v 1.80 2006/09/03 22:27:45 gdamore Exp
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.5 2008/03/29 05:42:46 tsutsui Exp $");
/*
* Clock driver for 'rtc' - mc146818 driver.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <dev/clock_subr.h>
#include <dev/ic/mc146818reg.h>
#include <dev/ic/mc146818var.h>
#include <dev/ebus/ebusreg.h>
#include <dev/ebus/ebusvar.h>
static int rtc_ebus_match(device_t, cfdata_t, void *);
static void rtc_ebus_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(rtc_ebus, sizeof(struct mc146818_softc),
rtc_ebus_match, rtc_ebus_attach, NULL, NULL);
u_int rtc_read_reg(struct mc146818_softc *, u_int);
void rtc_write_reg(struct mc146818_softc *, u_int, u_int);
u_int rtc_getcent(struct mc146818_softc *);
void rtc_setcent(struct mc146818_softc *, u_int);
static int
rtc_ebus_match(device_t parent, cfdata_t cf, void *aux)
{
struct ebus_attach_args *ea = aux;
return (strcmp("rtc", ea->ea_name) == 0);
}
/*
* `rtc' is a ds1287 on an ebus (actually an isa bus, but we use the
* ebus driver for isa.) So we can use ebus_wenable() but need to do
* different attach work and use different todr routines. It does not
* incorporate an IDPROM.
*/
/*
* XXX the stupid ds1287 is not mapped directly but uses an address
* and a data reg so we cannot access the stuuupid thing w/o having
* write access to the registers.
*
* XXXX We really need to mutex register access!
*/
#define RTC_ADDR 0
#define RTC_DATA 1
u_int
rtc_read_reg(struct mc146818_softc *sc, u_int reg)
{
bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_ADDR, reg);
return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, RTC_DATA));
}
void
rtc_write_reg(struct mc146818_softc *sc, u_int reg, u_int val)
{
bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_ADDR, reg);
bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_DATA, val);
}
/* ARGSUSED */
static void
rtc_ebus_attach(device_t parent, device_t self, void *aux)
{
struct mc146818_softc *sc = device_private(self);
struct ebus_attach_args *ea = aux;
char *model;
int sz;
sc->sc_dev = self;
sc->sc_bst = ea->ea_bustag;
/* hard code to 8K? */
sz = ea->ea_reg[0].size;
if (bus_space_map(sc->sc_bst,
EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
sz,
BUS_SPACE_MAP_LINEAR,
&sc->sc_bsh) != 0) {
aprint_error(": can't map register\n");
return;
}
model = prom_getpropstring(ea->ea_node, "model");
#ifdef DIAGNOSTIC
if (model == NULL)
panic("clockattach_rtc: no model property");
#endif
/* Our TOD clock year 0 is 0 */
sc->sc_year0 = 0;
sc->sc_flag = MC146818_NO_CENT_ADJUST;
sc->sc_mcread = rtc_read_reg;
sc->sc_mcwrite = rtc_write_reg;
sc->sc_getcent = rtc_getcent;
sc->sc_setcent = rtc_setcent;
mc146818_attach(sc);
aprint_normal(": %s\n", model);
/*
* Turn interrupts off, just in case. (Although they shouldn't
* be wired to an interrupt controller on sparcs).
*/
rtc_write_reg(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
/*
* Apparently on some machines the TOD registers are on the same
* physical page as the COM registers. So we won't protect them.
*/
/*sc->sc_handle.todr_setwen = NULL;*/
}
/*
* MD mc146818 RTC todr routines.
*/
/* Loooks like Sun stores the century info somewhere in CMOS RAM */
#define MC_CENT 0x32
u_int
rtc_getcent(struct mc146818_softc *sc)
{
return rtc_read_reg(sc, MC_CENT);
}
void
rtc_setcent(struct mc146818_softc *sc, u_int cent)
{
rtc_write_reg(sc, MC_CENT, cent);
}