diff options
Diffstat (limited to 'sys/alpha/tc/mcclock_ioasic.c')
| -rw-r--r-- | sys/alpha/tc/mcclock_ioasic.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/sys/alpha/tc/mcclock_ioasic.c b/sys/alpha/tc/mcclock_ioasic.c new file mode 100644 index 0000000..2dee0c0 --- /dev/null +++ b/sys/alpha/tc/mcclock_ioasic.c @@ -0,0 +1,130 @@ +/* $Id$ */ +/* $NetBSD: mcclock_ioasic.c,v 1.8 1997/09/02 13:20:14 thorpej Exp $ */ + +/* + * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Chris G. Demetriou + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/bus.h> + +#include <machine/clockvar.h> +#include <dev/dec/mcclockvar.h> + +#include <alpha/tlsb/gbusvar.h> + +#include <alpha/tc/tcreg.h> +#include <alpha/tc/tcvar.h> +#include <alpha/tc/tcdevs.h> +#include <alpha/tc/ioasicreg.h> +#include <alpha/tc/ioasicvar.h> + +#include <dev/dec/mc146818reg.h> + + + +struct mcclock_ioasic_clockdatum { + u_char datum; + char pad[3]; +}; + +#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr))) +/* + * Registers are 64 bytes apart (and 1 byte wide) + */ +#define REGSHIFT 6 + +struct mcclock_ioasic_softc { + unsigned long regbase; + struct mcclock_ioasic_clockdatum *sc_dp; +}; + +static int mcclock_ioasic_probe(device_t dev); +static int mcclock_ioasic_attach(device_t dev); +static void mcclock_ioasic_write(device_t, u_int, u_int); +static u_int mcclock_ioasic_read(device_t, u_int); + +static device_method_t mcclock_ioasic_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, mcclock_ioasic_probe), + DEVMETHOD(device_attach, mcclock_ioasic_attach), + + /* mcclock interface */ + DEVMETHOD(mcclock_write, mcclock_ioasic_write), + DEVMETHOD(mcclock_read, mcclock_ioasic_read), + + /* clock interface */ + DEVMETHOD(clock_init, mcclock_init), + DEVMETHOD(clock_get, mcclock_get), + DEVMETHOD(clock_set, mcclock_set), + + { 0, 0 } +}; + +static driver_t mcclock_ioasic_driver = { + "mcclock", + mcclock_ioasic_methods, + DRIVER_TYPE_MISC, + sizeof(struct mcclock_ioasic_softc), +}; + +static devclass_t mcclock_devclass; + +int +mcclock_ioasic_probe(device_t dev) +{ + device_set_desc(dev, "MC146818A real time clock"); + return 0; +} + +static int +mcclock_ioasic_attach(device_t dev) +{ + struct mcclock_ioasic_softc *sc = device_get_softc(dev); + struct ioasic_dev *ioasic = device_get_ivars(dev); + sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasic->iada_addr; + mcclock_attach(dev); + return 0; +} + +void +mcclock_ioasic_write(device_t dev, u_int reg, u_int datum) +{ + struct mcclock_ioasic_softc *sc = device_get_softc(dev); + sc->sc_dp[reg].datum = datum; +} + +u_int +mcclock_ioasic_read(device_t dev, u_int reg) +{ + struct mcclock_ioasic_softc *sc = device_get_softc(dev); + return (sc->sc_dp[reg].datum); +} + +DRIVER_MODULE(mcclock, ioasic, mcclock_ioasic_driver, mcclock_devclass, 0, 0); |
