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/* $OpenBSD: mk48txx.c,v 1.7 2011/04/05 19:54:35 jasper 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 <sys/param.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <machine/bus.h>
#include <dev/clock_subr.h>
#include <dev/ic/mk48txxreg.h>
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_getcal(todr_chip_handle_t, int *);
int mk48txx_setcal(todr_chip_handle_t, int);
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_getcal = mk48txx_getcal;
handle->todr_setcal = mk48txx_setcal;
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_getcal(handle, vp)
todr_chip_handle_t handle;
int *vp;
{
return (EOPNOTSUPP);
}
int
mk48txx_setcal(handle, v)
todr_chip_handle_t handle;
int v;
{
return (EOPNOTSUPP);
}
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);
}
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