/* $OpenBSD: mk48txx.c,v 1.8 2021/04/24 10:15:15 mpi Exp $ */ /* $NetBSD: mk48txx.c,v 1.7 2001/04/08 17:05:10 tsutsui Exp $ */ /*- * Copyright (c) 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines. */ #include #include #include #include #include #include #include struct mk48txx { bus_space_tag_t mk_bt; /* bus tag & handle */ bus_space_handle_t mk_bh; /* */ bus_size_t mk_nvramsz; /* Size of NVRAM on the chip */ bus_size_t mk_clkoffset; /* Offset in NVRAM to clock bits */ u_int mk_year0; /* What year is represented on the system by the chip's year counter at 0 */ }; int mk48txx_gettime(todr_chip_handle_t, struct timeval *); int mk48txx_settime(todr_chip_handle_t, struct timeval *); int mk48txx_auto_century_adjust = 1; struct { const char *name; bus_size_t nvramsz; bus_size_t clkoff; int flags; #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */ } mk48txx_models[] = { { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 }, { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 }, { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 }, { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS }, }; todr_chip_handle_t mk48txx_attach(bt, bh, model, year0) bus_space_tag_t bt; bus_space_handle_t bh; const char *model; int year0; { todr_chip_handle_t handle; struct mk48txx *mk; bus_size_t nvramsz, clkoff; int sz; int i; printf(": %s", model); i = nitems(mk48txx_models); while (--i >= 0) { if (strcmp(model, mk48txx_models[i].name) == 0) { nvramsz = mk48txx_models[i].nvramsz; clkoff = mk48txx_models[i].clkoff; break; } } if (i < 0) { printf(": unsupported model"); return (NULL); } sz = ALIGN(sizeof(struct todr_chip_handle)) + sizeof(struct mk48txx); handle = malloc(sz, M_DEVBUF, M_NOWAIT); if (handle == NULL) { printf(": failed to allocate memory"); return NULL; } mk = (struct mk48txx *)((u_long)handle + ALIGN(sizeof(struct todr_chip_handle))); handle->cookie = mk; handle->todr_gettime = mk48txx_gettime; handle->todr_settime = mk48txx_settime; handle->todr_setwen = NULL; mk->mk_bt = bt; mk->mk_bh = bh; mk->mk_nvramsz = nvramsz; mk->mk_clkoffset = clkoff; mk->mk_year0 = year0; return (handle); } /* * Get time-of-day and convert to a `struct timeval' * Return 0 on success; an error number otherwise. */ int mk48txx_gettime(handle, tv) todr_chip_handle_t handle; struct timeval *tv; { struct mk48txx *mk = handle->cookie; bus_space_tag_t bt = mk->mk_bt; bus_space_handle_t bh = mk->mk_bh; bus_size_t clkoff = mk->mk_clkoffset; struct clock_ymdhms dt; int year; u_int8_t csr; todr_wenable(handle, 1); /* enable read (stop time) */ csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR); csr |= MK48TXX_CSR_READ; bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr); dt.dt_sec = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_ISEC)); dt.dt_min = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMIN)); dt.dt_hour = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IHOUR)); dt.dt_day = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IDAY)); dt.dt_wday = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IWDAY)); dt.dt_mon = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMON)); year = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IYEAR)); year += mk->mk_year0; if (year < POSIX_BASE_YEAR && mk48txx_auto_century_adjust != 0 && mk->mk_year0 >= POSIX_BASE_YEAR) year += 100; dt.dt_year = year; /* time wears on */ csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR); csr &= ~MK48TXX_CSR_READ; bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr); todr_wenable(handle, 0); /* simple sanity checks */ if (dt.dt_mon > 12 || dt.dt_day > 31 || dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) return (1); tv->tv_sec = clock_ymdhms_to_secs(&dt); tv->tv_usec = 0; return (0); } /* * Set the time-of-day clock based on the value of the `struct timeval' arg. * Return 0 on success; an error number otherwise. */ int mk48txx_settime(handle, tv) todr_chip_handle_t handle; struct timeval *tv; { struct mk48txx *mk = handle->cookie; bus_space_tag_t bt = mk->mk_bt; bus_space_handle_t bh = mk->mk_bh; bus_size_t clkoff = mk->mk_clkoffset; struct clock_ymdhms dt; u_int8_t csr; int year; /* Note: we ignore `tv_usec' */ clock_secs_to_ymdhms(tv->tv_sec, &dt); year = dt.dt_year - mk->mk_year0; if (year > 99 && mk48txx_auto_century_adjust != 0) year -= 100; todr_wenable(handle, 1); /* enable write */ csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR); csr |= MK48TXX_CSR_WRITE; bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr); bus_space_write_1(bt, bh, clkoff + MK48TXX_ISEC, TOBCD(dt.dt_sec)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IMIN, TOBCD(dt.dt_min)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IHOUR, TOBCD(dt.dt_hour)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IWDAY, TOBCD(dt.dt_wday)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IDAY, TOBCD(dt.dt_day)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IMON, TOBCD(dt.dt_mon)); bus_space_write_1(bt, bh, clkoff + MK48TXX_IYEAR, TOBCD(year)); /* load them up */ csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR); csr &= ~MK48TXX_CSR_WRITE; bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr); todr_wenable(handle, 0); return (0); } int mk48txx_get_nvram_size(handle, vp) todr_chip_handle_t handle; bus_size_t *vp; { struct mk48txx *mk = handle->cookie; *vp = mk->mk_nvramsz; return (0); }