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aurtc.c revision 1.1 
      1 /* $NetBSD: aurtc.c,v 1.1 2002/07/29 15:39:14 simonb Exp $ */
      2 
      3 /*
      4  * Copyright 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Simon Burge for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed for the NetBSD Project by
     20  *      Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/device.h>
     41 
     42 #include <dev/clock_subr.h>
     43 
     44 #include <evbmips/evbmips/clockvar.h>
     45 #include <mips/alchemy/include/aureg.h>
     46 #include <mips/alchemy/include/aubusvar.h>
     47 
     48 static int	aurtc_match(struct device *, struct cfdata *, void *);
     49 static void	aurtc_attach(struct device *, struct device *, void *);
     50 
     51 static void	aurtc_init(struct device *);
     52 static void	aurtc_get(struct device *, time_t, struct clocktime *);
     53 static void	aurtc_set(struct device *, struct clocktime *);
     54 
     55 struct cfattach aurtc_ca = {
     56 	sizeof (struct device), aurtc_match, aurtc_attach,
     57 };
     58 
     59 const struct clockfns aurtc_clockfns = {
     60 	aurtc_init, aurtc_get, aurtc_set,
     61 };
     62 
     63 int
     64 aurtc_match(struct device *parent, struct cfdata *match, void *aux)
     65 {
     66 	struct aubus_attach_args *aa = aux;
     67 
     68 	if (strcmp(aa->aa_name, match->cf_driver->cd_name) == 0)
     69 		return (1);
     70 
     71 	return (0);
     72 }
     73 
     74 void
     75 aurtc_attach(struct device *parent, struct device *self, void *aux)
     76 {
     77 
     78 	printf(": Au1X00 programmable clock");	/* \n in clockattach */
     79 	clockattach(self, &aurtc_clockfns);
     80 }
     81 
     82 void
     83 aurtc_init(struct device *dev)
     84 {
     85 
     86 	/* We don't use the aurtc for the hardclock interrupt. */
     87 }
     88 
     89 /*
     90  * Note the fake "aurtc" on the Alchemy pb1000 uses a different year base.
     91  */
     92 #define	PB1000_YEAR_OFFSET	100
     93 
     94 /*
     95  * Get the time of day, based on the clock's value and/or the base value.
     96  */
     97 void
     98 aurtc_get(struct device *dev, time_t base, struct clocktime *ct)
     99 {
    100 	struct clock_ymdhms ymdhms;
    101 	time_t secs;
    102 
    103 	secs = *(u_int32_t *)MIPS_PHYS_TO_KSEG1(PC_BASE + PC_COUNTER_READ_0);
    104 
    105 	clock_secs_to_ymdhms(secs, &ymdhms);
    106 
    107 	ct->sec = ymdhms.dt_sec;
    108 	ct->min = ymdhms.dt_min;
    109 	ct->hour = ymdhms.dt_hour;
    110 	ct->dow = ymdhms.dt_wday;
    111 	ct->day = ymdhms.dt_day;
    112 	ct->mon = ymdhms.dt_mon;
    113 	ct->year = ymdhms.dt_year - PB1000_YEAR_OFFSET;
    114 }
    115 
    116 /*
    117  * Reset the TODR based on the time value.
    118  */
    119 void
    120 aurtc_set(struct device *dev, struct clocktime *ct)
    121 {
    122 	struct clock_ymdhms ymdhms;
    123 	time_t secs;
    124 
    125 	ymdhms.dt_sec = ct->sec;
    126 	ymdhms.dt_min = ct->min;
    127 	ymdhms.dt_hour = ct->hour;
    128 	ymdhms.dt_wday = ct->dow;
    129 	ymdhms.dt_day = ct->day;
    130 	ymdhms.dt_mon = ct->mon;
    131 	ymdhms.dt_year = ct->year + PB1000_YEAR_OFFSET;
    132 
    133 	secs = clock_ymdhms_to_secs(&ymdhms);
    134 
    135 	*(u_int32_t *)MIPS_PHYS_TO_KSEG1(PC_BASE + PC_COUNTER_READ_0) = secs;
    136 }
    137