aafdb08c5a
-Wcast-qual differently, by instead changing the signatore of those "functions" to take a "volatile struct timeval*" instead of a "struct timeval*". Many places, these functions are called with &time, and time is declared as volatile in <sys/kernel.h>. This way we can get rid of all the ugly casts which now also triggered warnings, and caused more code to be added to work around the problem. Reviewed by thorpej.
259 lines
7.3 KiB
C
259 lines
7.3 KiB
C
/* $NetBSD: mk48txx.c,v 1.17 2005/06/04 20:14:25 he Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.17 2005/06/04 20:14:25 he Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/mk48txxreg.h>
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#include <dev/ic/mk48txxvar.h>
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int mk48txx_gettime(todr_chip_handle_t, volatile struct timeval *);
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int mk48txx_settime(todr_chip_handle_t, volatile struct timeval *);
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int mk48txx_getcal(todr_chip_handle_t, int *);
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int mk48txx_setcal(todr_chip_handle_t, int);
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u_int8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
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void mk48txx_def_nvwr(struct mk48txx_softc *, int, u_int8_t);
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struct {
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const char *name;
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bus_size_t nvramsz;
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bus_size_t clkoff;
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int flags;
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#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
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} mk48txx_models[] = {
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{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
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{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
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{ "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
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{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
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};
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void
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mk48txx_attach(sc)
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struct mk48txx_softc *sc;
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{
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todr_chip_handle_t handle;
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int i;
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printf(": %s", sc->sc_model);
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i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
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while (--i >= 0) {
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if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0)
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break;
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}
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if (i < 0)
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panic("mk48txx_attach: unsupported model");
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sc->sc_nvramsz = mk48txx_models[i].nvramsz;
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sc->sc_clkoffset = mk48txx_models[i].clkoff;
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handle = &sc->sc_handle;
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handle->cookie = sc;
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handle->todr_gettime = mk48txx_gettime;
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handle->todr_settime = mk48txx_settime;
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handle->todr_getcal = mk48txx_getcal;
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handle->todr_setcal = mk48txx_setcal;
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handle->todr_setwen = NULL;
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if (sc->sc_nvrd == NULL)
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sc->sc_nvrd = mk48txx_def_nvrd;
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if (sc->sc_nvwr == NULL)
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sc->sc_nvwr = mk48txx_def_nvwr;
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}
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/*
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* Get time-of-day and convert to a `struct timeval'
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_gettime(handle, tv)
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todr_chip_handle_t handle;
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volatile struct timeval *tv;
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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struct clock_ymdhms dt;
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int year;
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u_int8_t csr;
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sc = handle->cookie;
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clkoff = sc->sc_clkoffset;
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todr_wenable(handle, 1);
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/* enable read (stop time) */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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dt.dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC));
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dt.dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN));
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dt.dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR));
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dt.dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY));
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dt.dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY));
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dt.dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON));
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year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR));
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year += sc->sc_year0;
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if (year < POSIX_BASE_YEAR &&
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(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
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year += 100;
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dt.dt_year = year;
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/* time wears on */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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todr_wenable(handle, 0);
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/* simple sanity checks */
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if (dt.dt_mon > 12 || dt.dt_day > 31 ||
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dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60)
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return EIO;
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tv->tv_sec = clock_ymdhms_to_secs(&dt);
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if (tv->tv_sec == -1) return ERANGE;
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tv->tv_usec = 0;
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return 0;
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}
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/*
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* Set the time-of-day clock based on the value of the `struct timeval' arg.
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_settime(handle, tv)
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todr_chip_handle_t handle;
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volatile struct timeval *tv;
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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struct clock_ymdhms dt;
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u_int8_t csr;
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int year;
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long sec;
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sc = handle->cookie;
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clkoff = sc->sc_clkoffset;
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/* Note: we ignore `tv_usec' */
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sec = tv->tv_sec + ((tv->tv_usec < 500000) ? 0 : 1);
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clock_secs_to_ymdhms(sec, &dt);
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year = dt.dt_year - sc->sc_year0;
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if (year > 99 &&
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(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
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year -= 100;
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todr_wenable(handle, 1);
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/* enable write */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt.dt_sec));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt.dt_min));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt.dt_hour));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt.dt_wday));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt.dt_day));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt.dt_mon));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year));
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/* load them up */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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todr_wenable(handle, 0);
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return 0;
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}
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int
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mk48txx_getcal(handle, vp)
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todr_chip_handle_t handle;
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int *vp;
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{
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return EOPNOTSUPP;
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}
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int
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mk48txx_setcal(handle, v)
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todr_chip_handle_t handle;
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int v;
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{
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return EOPNOTSUPP;
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}
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int
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mk48txx_get_nvram_size(handle, vp)
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todr_chip_handle_t handle;
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bus_size_t *vp;
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{
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struct mk48txx_softc *sc;
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sc = handle->cookie;
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*vp = sc->sc_nvramsz;
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return 0;
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}
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u_int8_t
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mk48txx_def_nvrd(struct mk48txx_softc *sc, int off)
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{
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return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off);
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}
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void
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mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, u_int8_t v)
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{
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
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}
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