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      1 /*	$NetBSD: mcclock_jazzio.c,v 1.13 2011/07/01 19:25:42 dyoung Exp $	*/
      2 /*	$OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $	*/
      3 /*	NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp 	*/
      4 
      5 /*
      6  * Copyright (c) 1988 University of Utah.
      7  * Copyright (c) 1992, 1993
      8  *	The Regents of the University of California.  All rights reserved.
      9  *
     10  * This code is derived from software contributed to Berkeley by
     11  * the Systems Programming Group of the University of Utah Computer
     12  * Science Department and Ralph Campbell.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  * 3. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  * from: Utah Hdr: clock.c 1.18 91/01/21
     39  *
     40  *	@(#)clock.c	8.1 (Berkeley) 6/10/93
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: mcclock_jazzio.c,v 1.13 2011/07/01 19:25:42 dyoung Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 
     50 #include <machine/autoconf.h>
     51 #include <sys/bus.h>
     52 
     53 #include <dev/clock_subr.h>
     54 
     55 #include <dev/ic/mc146818reg.h>
     56 #include <dev/ic/mc146818var.h>
     57 
     58 #include <arc/jazz/jazziovar.h>
     59 #include <arc/jazz/mcclock_jazziovar.h>
     60 
     61 int mcclock_jazzio_match(device_t, cfdata_t, void *);
     62 void mcclock_jazzio_attach(device_t, device_t, void *);
     63 
     64 CFATTACH_DECL_NEW(mcclock_jazzio, sizeof(struct mc146818_softc),
     65     mcclock_jazzio_match, mcclock_jazzio_attach, NULL, NULL);
     66 
     67 struct mcclock_jazzio_config *mcclock_jazzio_conf = NULL;
     68 static int mcclock_jazzio_found = 0;
     69 
     70 int
     71 mcclock_jazzio_match(device_t parent, cfdata_t cf, void *aux)
     72 {
     73 	struct jazzio_attach_args *ja = aux;
     74 
     75 	/* make sure that we're looking for this type of device. */
     76 	if (strcmp(ja->ja_name, "dallas_rtc") != 0)
     77 		return 0;
     78 
     79 	if (mcclock_jazzio_found)
     80 		return 0;
     81 
     82 	return 1;
     83 }
     84 
     85 void
     86 mcclock_jazzio_attach(device_t parent, device_t self, void *aux)
     87 {
     88 	struct mc146818_softc *sc = device_private(self);
     89 	struct jazzio_attach_args *ja = aux;
     90 
     91 	if (mcclock_jazzio_conf == NULL)
     92 		panic("mcclock_jazzio_conf isn't initialized");
     93 
     94 	sc->sc_dev = self;
     95 	sc->sc_bst = ja->ja_bust;
     96 	if (bus_space_map(sc->sc_bst,
     97 	    ja->ja_addr, mcclock_jazzio_conf->mjc_iosize, 0, &sc->sc_bsh)) {
     98 		aprint_error(": unable to map I/O space\n");
     99 		return;
    100 	}
    101 
    102 	sc->sc_year0 = 1980;
    103 	sc->sc_mcread  = mcclock_jazzio_conf->mjc_mc_read;
    104 	sc->sc_mcwrite = mcclock_jazzio_conf->mjc_mc_write;
    105 
    106 	mc146818_attach(sc);
    107 
    108 	aprint_normal("\n");
    109 
    110 	/* Turn interrupts off, just in case. */
    111 	(*sc->sc_mcwrite)(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
    112 
    113 	mcclock_jazzio_found = 1;
    114 }
    115