2017-11-21 17:23:16 +00:00
|
|
|
/*-
|
|
|
|
* Copyright (c) 2017 Andrew Turner
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* This software was developed by SRI International and the University of
|
|
|
|
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
|
|
|
|
* ("CTSRD"), as part of the DARPA CRASH research programme.
|
|
|
|
*
|
|
|
|
* 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 AUTHOR 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 AUTHOR 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/bus.h>
|
|
|
|
#include <sys/clock.h>
|
|
|
|
#include <sys/efi.h>
|
|
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/module.h>
|
|
|
|
|
|
|
|
#include "clock_if.h"
|
|
|
|
|
|
|
|
static void
|
|
|
|
efirtc_identify(driver_t *driver, device_t parent)
|
|
|
|
{
|
|
|
|
struct efi_tm tm;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check if we can read the time. This will stop us attaching when
|
|
|
|
* there is no EFI Runtime support, or the gettime function is
|
|
|
|
* unimplemented, e.g. on some builds of U-Boot.
|
|
|
|
*/
|
|
|
|
error = efi_get_time(&tm);
|
|
|
|
if (error != 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (device_find_child(parent, "efirtc", -1) != NULL)
|
|
|
|
return;
|
|
|
|
if (BUS_ADD_CHILD(parent, 0, "efirtc", -1) == NULL)
|
|
|
|
device_printf(parent, "add child failed\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
efirtc_probe(device_t dev)
|
|
|
|
{
|
|
|
|
|
|
|
|
device_quiet(dev);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
efirtc_attach(device_t dev)
|
|
|
|
{
|
|
|
|
|
|
|
|
clock_register(dev, 1000000);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
efirtc_detach(device_t dev)
|
|
|
|
{
|
|
|
|
|
|
|
|
clock_unregister(dev);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
efirtc_gettime(device_t dev, struct timespec *ts)
|
|
|
|
{
|
|
|
|
struct clocktime ct;
|
|
|
|
struct efi_tm tm;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = efi_get_time(&tm);
|
|
|
|
if (error != 0)
|
|
|
|
return (error);
|
|
|
|
|
|
|
|
ct.sec = tm.tm_sec;
|
|
|
|
ct.min = tm.tm_min;
|
|
|
|
ct.hour = tm.tm_hour;
|
|
|
|
ct.day = tm.tm_mday;
|
|
|
|
ct.mon = tm.tm_mon;
|
|
|
|
ct.year = tm.tm_year;
|
|
|
|
ct.nsec = tm.tm_nsec;
|
|
|
|
|
|
|
|
return (clock_ct_to_ts(&ct, ts));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
efirtc_settime(device_t dev, struct timespec *ts)
|
|
|
|
{
|
|
|
|
struct clocktime ct;
|
|
|
|
struct efi_tm tm;
|
|
|
|
|
|
|
|
clock_ts_to_ct(ts, &ct);
|
|
|
|
|
2017-11-23 10:34:38 +00:00
|
|
|
bzero(&tm, sizeof(tm));
|
2017-11-21 17:23:16 +00:00
|
|
|
tm.tm_sec = ct.sec;
|
|
|
|
tm.tm_min = ct.min;
|
|
|
|
tm.tm_hour = ct.hour;
|
|
|
|
tm.tm_mday = ct.day;
|
|
|
|
tm.tm_mon = ct.mon;
|
|
|
|
tm.tm_year = ct.year;
|
|
|
|
tm.tm_nsec = ct.nsec;
|
|
|
|
|
|
|
|
return (efi_set_time(&tm));
|
|
|
|
}
|
|
|
|
|
|
|
|
static device_method_t efirtc_methods[] = {
|
|
|
|
/* Device interface */
|
|
|
|
DEVMETHOD(device_identify, efirtc_identify),
|
|
|
|
DEVMETHOD(device_probe, efirtc_probe),
|
|
|
|
DEVMETHOD(device_attach, efirtc_attach),
|
|
|
|
DEVMETHOD(device_detach, efirtc_detach),
|
|
|
|
|
|
|
|
/* Clock interface */
|
|
|
|
DEVMETHOD(clock_gettime, efirtc_gettime),
|
|
|
|
DEVMETHOD(clock_settime, efirtc_settime),
|
|
|
|
|
|
|
|
DEVMETHOD_END
|
|
|
|
};
|
|
|
|
|
|
|
|
static devclass_t efirtc_devclass;
|
|
|
|
static driver_t efirtc_driver = {
|
|
|
|
"efirtc",
|
|
|
|
efirtc_methods,
|
|
|
|
0
|
|
|
|
};
|
|
|
|
|
|
|
|
DRIVER_MODULE(efirtc, nexus, efirtc_driver, efirtc_devclass, 0, 0);
|