124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* $NetBSD: mcclock_tlsb.c,v 1.17 2011/07/01 19:19:51 dyoung Exp $ */
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/*
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* Copyright (c) 1997 by Matthew Jacob
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* NASA AMES Research Center.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.17 2011/07/01 19:19:51 dyoung Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <alpha/tlsb/gbusvar.h>
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#include <alpha/tlsb/tlsbreg.h> /* XXX */
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#include <dev/clock_subr.h>
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#include <dev/ic/mc146818reg.h>
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#include <dev/ic/mc146818var.h>
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#include <alpha/alpha/mcclockvar.h>
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#include "ioconf.h"
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#define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
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/*
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* Registers are 64 bytes apart (and 1 byte wide)
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*/
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#define REGSHIFT 6
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struct mcclock_tlsb_softc {
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struct mc146818_softc sc_mc146818;
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unsigned long regbase;
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};
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int mcclock_tlsb_match(device_t, cfdata_t, void *);
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void mcclock_tlsb_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(mcclock_tlsb, sizeof(struct mcclock_tlsb_softc),
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mcclock_tlsb_match, mcclock_tlsb_attach, NULL, NULL);
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static void mcclock_tlsb_write(struct mc146818_softc *, u_int, u_int);
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static u_int mcclock_tlsb_read(struct mc146818_softc *, u_int);
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int
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mcclock_tlsb_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct gbus_attach_args *ga = aux;
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if (strcmp(ga->ga_name, mcclock_cd.cd_name))
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return (0);
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return (1);
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}
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void
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mcclock_tlsb_attach(device_t parent, device_t self, void *aux)
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{
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struct mcclock_tlsb_softc *tsc = device_private(self);
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struct gbus_attach_args *ga = aux;
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struct mc146818_softc *sc = &tsc->sc_mc146818;
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/* XXX Should be bus.h'd, so we can accommodate the kn7aa. */
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tsc->regbase = TLSB_GBUS_BASE + ga->ga_offset;
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sc->sc_dev = self;
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sc->sc_mcread = mcclock_tlsb_read;
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sc->sc_mcwrite = mcclock_tlsb_write;
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mcclock_attach(sc);
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}
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static void
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mcclock_tlsb_write(struct mc146818_softc *sc, u_int reg, u_int val)
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{
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struct mcclock_tlsb_softc *tsc = (void *)sc;
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unsigned char *ptr = (unsigned char *)
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KV(tsc->regbase + (reg << REGSHIFT));
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*ptr = val;
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}
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static u_int
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mcclock_tlsb_read(struct mc146818_softc *sc, u_int reg)
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{
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struct mcclock_tlsb_softc *tsc = (void *)sc;
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unsigned char *ptr = (unsigned char *)
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KV(tsc->regbase + (reg << REGSHIFT));
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return *ptr;
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}
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