54f40eb6c3
- Add locking.
- Account for if the MC146818_NO_CENT_ADJUST flag is set we don't need
to check wheter year < POSIX_BASE_YEAR.
- Add some comments about mapping the day of week from the range the
generic clock code uses to the range the chip uses and which I meant
to add in the initial version.
- Minor clean-up, use __func__ instead of hardcoded function names in
error strings.
o in the rtc(4) front-end additionally:
- Don't leak resources in case mc146818_attach() fails.
- Account for ebus(4) defaulting to SYS_RES_MEMORY for the memory
resources since ebus.c rev. 1.22.
63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/*-
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* Copyright (c) 2003 Izumi Tsutsui. 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, 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: NetBSD: mc146818var.h,v 1.3 2003/11/24 06:20:40 tsutsui Exp
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*
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* $FreeBSD$
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*/
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struct mc146818_softc {
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bus_space_tag_t sc_bst; /* bus space tag */
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bus_space_handle_t sc_bsh; /* bus space handle */
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struct mtx sc_mtx; /* hardware mutex */
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u_char sc_rega; /* register A */
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u_char sc_regb; /* register B */
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u_int sc_year0; /* year counter offset */
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u_int sc_flag; /* MD flags */
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#define MC146818_NO_CENT_ADJUST 0x0001 /* don't adjust century */
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#define MC146818_BCD 0x0002 /* use BCD mode */
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#define MC146818_12HR 0x0004 /* use AM/PM mode */
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/* MD chip register read/write functions */
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u_int (*sc_mcread)(device_t, u_int);
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void (*sc_mcwrite)(device_t, u_int, u_int);
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/* MD century get/set functions */
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u_int (*sc_getcent)(device_t);
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void (*sc_setcent)(device_t, u_int);
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};
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/* Chip attach function */
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int mc146818_attach(device_t);
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/* Methods for the clock interface */
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#ifdef notyet
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int mc146818_getsecs(device_t, int *);
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#endif
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int mc146818_gettime(device_t, struct timespec *);
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int mc146818_settime(device_t, struct timespec *);
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