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author | dfr <dfr@FreeBSD.org> | 1998-07-15 19:21:31 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 1998-07-15 19:21:31 +0000 |
commit | f14b57be26fe4027f7566700a02d4cb3b549c204 (patch) | |
tree | 50c295cdc454af7633048f8ab2678229366cc652 /sys/alpha/isa/mcclock_isa.c | |
parent | 0b4d04df93d8ca62df544014a9e1b4dc88f8270e (diff) | |
download | FreeBSD-src-f14b57be26fe4027f7566700a02d4cb3b549c204.zip FreeBSD-src-f14b57be26fe4027f7566700a02d4cb3b549c204.tar.gz |
An mc146818a clock attached to an isa bus.
Diffstat (limited to 'sys/alpha/isa/mcclock_isa.c')
-rw-r--r-- | sys/alpha/isa/mcclock_isa.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sys/alpha/isa/mcclock_isa.c b/sys/alpha/isa/mcclock_isa.c new file mode 100644 index 0000000..34b9a90 --- /dev/null +++ b/sys/alpha/isa/mcclock_isa.c @@ -0,0 +1,105 @@ +/* $Id$ */ +/* $NetBSD: mcclock_tlsb.c,v 1.8 1998/05/13 02:50:29 thorpej Exp $ */ + +/* + * Copyright (c) 1997 by Matthew Jacob + * NASA AMES Research Center. + * 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 immediately at the beginning of the file, without modification, + * 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#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 <dev/dec/mc146818reg.h> + +static int mcclock_isa_probe(device_t dev); +static int mcclock_isa_attach(device_t dev); +static void mcclock_isa_write(device_t, u_int, u_int); +static u_int mcclock_isa_read(device_t, u_int); + +static device_method_t mcclock_isa_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, mcclock_isa_probe), + DEVMETHOD(device_attach, mcclock_isa_attach), + + /* mcclock interface */ + DEVMETHOD(mcclock_write, mcclock_isa_write), + DEVMETHOD(mcclock_read, mcclock_isa_read), + + /* clock interface */ + DEVMETHOD(clock_init, mcclock_init), + DEVMETHOD(clock_get, mcclock_get), + DEVMETHOD(clock_set, mcclock_set), + + { 0, 0 } +}; + +static driver_t mcclock_isa_driver = { + "mcclock", + mcclock_isa_methods, + DRIVER_TYPE_MISC, + 1, /* XXX no softc */ +}; + +static devclass_t mcclock_devclass; + +int +mcclock_isa_probe(device_t dev) +{ + device_set_desc(dev, "MC146818A real time clock"); + return 0; +} + +int +mcclock_isa_attach(device_t dev) +{ + mcclock_attach(dev); + return 0; +} + +static void +mcclock_isa_write(device_t dev, u_int reg, u_int val) +{ + outb(0x70, reg); + outb(0x71, val); +} + +static u_int +mcclock_isa_read(device_t dev, u_int reg) +{ + outb(0x70, reg); + return inb(0x71); +} + +/* XXX put it on the root for now, later on isa */ +DRIVER_MODULE(mcclock_isa, root, mcclock_isa_driver, mcclock_devclass, 0, 0); |