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Add a driver back end for the Mostek MK48T02, MK48T08 and MK48T59
time-of-day clocks, ported from NetBSD. The front-ends are expected to be at least partly machine-dependent; the sparc64 EBus and SBus ones will be commited to MD directories for now (in a subsequent commit).
This commit is contained in:
Thomas Moestl
parent
d7f7792edf
commit
635435f4f6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=93836
@ -420,6 +420,7 @@ dev/mii/lxtphy.c optional miibus
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dev/mii/qsphy.c optional miibus
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dev/mii/acphy.c optional miibus
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dev/mii/miibus_if.m optional miibus
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dev/mk48txx/mk48txx.c optional mk48txx
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dev/mlx/mlx.c optional mlx
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dev/mlx/mlx_disk.c optional mlx
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dev/mlx/mlx_pci.c optional mlx
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211
sys/dev/mk48txx/mk48txx.c
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211
sys/dev/mk48txx/mk48txx.c
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@ -0,0 +1,211 @@
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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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* $NetBSD: mk48txx.c,v 1.7 2001/04/08 17:05:10 tsutsui Exp $
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*
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* $FreeBSD$
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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/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <mk48txx/mk48txxreg.h>
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#include "clock_if.h"
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struct mk48txx_softc {
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bus_space_tag_t mk_bt; /* bus tag & handle */
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bus_space_handle_t mk_bh; /* */
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bus_size_t mk_nvramsz; /* Size of NVRAM on the chip */
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bus_size_t mk_clkoffset; /* Offset in NVRAM to clock bits */
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u_int mk_year0; /* What year is represented on the system
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by the chip's year counter at 0 */
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};
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int mk48txx_auto_century_adjust = 1;
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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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{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
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};
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int
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mk48txx_attach(device_t dev, bus_space_tag_t bt, bus_space_handle_t bh,
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const char *model, int year0)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff = 0, nvramsz = 0;
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int i;
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device_printf(dev, "model %s", 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(model, mk48txx_models[i].name) == 0) {
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nvramsz = mk48txx_models[i].nvramsz;
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clkoff = mk48txx_models[i].clkoff;
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break;
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}
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}
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if (i < 0) {
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device_printf(dev, " (unsupported)\n");
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return (ENXIO);
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}
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printf("\n");
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sc = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
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sc->mk_bt = bt;
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sc->mk_bh = bh;
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sc->mk_nvramsz = nvramsz;
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sc->mk_clkoffset = clkoff;
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sc->mk_year0 = year0;
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device_set_softc(dev, sc);
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clock_register(dev, 1000000); /* 1 second resolution. */
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return (0);
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}
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/*
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* Get time-of-day and convert to a `struct timespec'
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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(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *mk = device_get_softc(dev);
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bus_space_tag_t bt = mk->mk_bt;
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bus_space_handle_t bh = mk->mk_bh;
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bus_size_t clkoff = mk->mk_clkoffset;
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struct clocktime ct;
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int year;
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u_int8_t csr;
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/* enable read (stop time) */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_READ;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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ct.nsec = 0;
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ct.sec = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_ISEC));
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ct.min = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMIN));
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ct.hour = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IHOUR));
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ct.day = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IDAY));
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ct.dow = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IWDAY)) % 7;
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ct.mon = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMON));
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year = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IYEAR));
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year += mk->mk_year0;
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if (year < POSIX_BASE_YEAR && mk48txx_auto_century_adjust != 0)
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year += 100;
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ct.year = year;
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/* time wears on */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_READ;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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return (clock_ct_to_ts(&ct, ts));
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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 timespec' 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(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *mk = device_get_softc(dev);
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bus_space_tag_t bt = mk->mk_bt;
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bus_space_handle_t bh = mk->mk_bh;
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bus_size_t clkoff = mk->mk_clkoffset;
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struct clocktime ct;
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u_int8_t csr;
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int year;
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/* Accuracy is only one second. */
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if (ts->tv_nsec >= 500000000)
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ts->tv_sec++;
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ts->tv_nsec = 0;
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clock_ts_to_ct(ts, &ct);
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year = ct.year - mk->mk_year0;
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if (year > 99 && mk48txx_auto_century_adjust != 0)
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year -= 100;
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/* enable write */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_WRITE;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ISEC, TOBCD(ct.sec));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IMIN, TOBCD(ct.min));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IHOUR, TOBCD(ct.hour));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IWDAY, TOBCD(ct.dow));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IDAY, TOBCD(ct.day));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IMON, TOBCD(ct.mon));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IYEAR, TOBCD(year));
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/* load them up */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_WRITE;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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return (0);
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}
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int
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mk48txx_get_nvram_size(device_t dev, bus_size_t *vp)
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{
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struct mk48txx_softc *mk;
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mk = device_get_softc(dev);
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*vp = mk->mk_nvramsz;
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return (0);
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}
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96
sys/dev/mk48txx/mk48txxreg.h
Normal file
96
sys/dev/mk48txx/mk48txxreg.h
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@ -0,0 +1,96 @@
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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
|
||||
* 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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* $NetBSD: mk48txxreg.h,v 1.4 2000/11/11 11:59:42 pk Exp $
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*
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* $FreeBSD$
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*/
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/*
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* Mostek MK48Txx clocks.
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*
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* The MK48T02 has 2KB of non-volatile memory. The time-of-day clock
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* registers start at offset 0x7f8.
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*
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* The MK48T08 has 8KB of non-volatile memory
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*
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* The MK48T59 also has 8KB of non-volatile memory but in addition it
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* has a battery low detection bit and a power supply wakeup alarm for
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* power management. It's at offset 0x1ff0 in the NVRAM.
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*/
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/*
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* Mostek MK48TXX register definitions
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*/
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/*
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* The first bank of eight registers at offset (nvramsz - 16) is
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* available only on recenter (which?) MK48Txx models.
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*/
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#define MK48TXX_X0 0 /* find out later */
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/* ... */
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#define MK48TXX_X7 7 /* find out later */
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#define MK48TXX_ICSR 8 /* control register */
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#define MK48TXX_ISEC 9 /* seconds (0..59; BCD) */
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#define MK48TXX_IMIN 10 /* minutes (0..59; BCD) */
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#define MK48TXX_IHOUR 11 /* hour (0..23; BCD) */
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#define MK48TXX_IWDAY 12 /* weekday (1..7) */
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#define MK48TXX_IDAY 13 /* day in month (1..31; BCD) */
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#define MK48TXX_IMON 14 /* month (1..12; BCD) */
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#define MK48TXX_IYEAR 15 /* year (0..99; BCD) */
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/* Bits in the control register */
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#define MK48TXX_CSR_WRITE 0x80 /* want to write */
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#define MK48TXX_CSR_READ 0x40 /* want to read (freeze clock) */
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#define MK48T02_CLKSZ 2048
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#define MK48T02_CLKOFF 0x7f0
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#define MK48T08_CLKSZ 8192
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#define MK48T08_CLKOFF 0x1ff0
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#define MK48T59_CLKSZ 8192
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#define MK48T59_CLKOFF 0x1ff0
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/* Chip attach function */
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int mk48txx_attach(device_t, bus_space_tag_t, bus_space_handle_t, const char *,
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int);
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/* Retrieve size of the on-chip NVRAM area */
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int mk48txx_get_nvram_size(device_t, bus_size_t *);
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/* Methods for the clock interface. */
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int mk48txx_gettime(device_t, struct timespec *);
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int mk48txx_settime(device_t, struct timespec *);
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