diff options
Diffstat (limited to 'sys/powerpc/pseries/rtas_dev.c')
| -rw-r--r-- | sys/powerpc/pseries/rtas_dev.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/sys/powerpc/pseries/rtas_dev.c b/sys/powerpc/pseries/rtas_dev.c new file mode 100644 index 000000000000..09e851f445f1 --- /dev/null +++ b/sys/powerpc/pseries/rtas_dev.c @@ -0,0 +1,170 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2011 Nathan Whitehorn + * All rights reserved. + * + * 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/param.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/clock.h> +#include <sys/cpu.h> +#include <sys/eventhandler.h> +#include <sys/kernel.h> +#include <sys/reboot.h> +#include <sys/sysctl.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/openfirm.h> + +#include <machine/rtas.h> + +#include "clock_if.h" + +static int rtasdev_probe(device_t); +static int rtasdev_attach(device_t); +/* clock interface */ +static int rtas_gettime(device_t dev, struct timespec *ts); +static int rtas_settime(device_t dev, struct timespec *ts); + +static void rtas_shutdown(void *arg, int howto); + +static device_method_t rtasdev_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, rtasdev_probe), + DEVMETHOD(device_attach, rtasdev_attach), + + /* clock interface */ + DEVMETHOD(clock_gettime, rtas_gettime), + DEVMETHOD(clock_settime, rtas_settime), + + { 0, 0 }, +}; + +static driver_t rtasdev_driver = { + "rtas", + rtasdev_methods, + 0 +}; + +DRIVER_MODULE(rtasdev, ofwbus, rtasdev_driver, 0, 0); + +static int +rtasdev_probe(device_t dev) +{ + const char *name = ofw_bus_get_name(dev); + + if (strcmp(name, "rtas") != 0) + return (ENXIO); + if (!rtas_exists()) + return (ENXIO); + + device_set_desc(dev, "Run-Time Abstraction Services"); + return (0); +} + +static int +rtasdev_attach(device_t dev) +{ + if (rtas_token_lookup("get-time-of-day") != -1) + clock_register(dev, 2000); + + EVENTHANDLER_REGISTER(shutdown_final, rtas_shutdown, NULL, + SHUTDOWN_PRI_LAST); + + return (0); +} + +static int +rtas_gettime(device_t dev, struct timespec *ts) { + struct clocktime ct; + cell_t tod[8]; + cell_t token; + int error; + + token = rtas_token_lookup("get-time-of-day"); + if (token == -1) + return (ENXIO); + error = rtas_call_method(token, 0, 8, &tod[0], &tod[1], &tod[2], + &tod[3], &tod[4], &tod[5], &tod[6], &tod[7]); + if (error < 0) + return (ENXIO); + if (tod[0] != 0) + return ((tod[0] == -1) ? ENXIO : EAGAIN); + + ct.year = tod[1]; + ct.mon = tod[2]; + ct.day = tod[3]; + ct.hour = tod[4]; + ct.min = tod[5]; + ct.sec = tod[6]; + ct.nsec = tod[7]; + + return (clock_ct_to_ts(&ct, ts)); +} + +static int +rtas_settime(device_t dev, struct timespec *ts) +{ + struct clocktime ct; + cell_t token, status; + int error; + + token = rtas_token_lookup("set-time-of-day"); + if (token == -1) + return (ENXIO); + + clock_ts_to_ct(ts, &ct); + error = rtas_call_method(token, 7, 1, ct.year, ct.mon, ct.day, ct.hour, + ct.min, ct.sec, ct.nsec, &status); + if (error < 0) + return (ENXIO); + if (status != 0) + return (((int)status < 0) ? ENXIO : EAGAIN); + + return (0); +} + +static void +rtas_shutdown(void *arg, int howto) +{ + cell_t token, status; + + if ((howto & RB_POWEROFF) != 0) { + token = rtas_token_lookup("power-off"); + if (token == -1) + return; + + rtas_call_method(token, 2, 1, 0, 0, &status); + } else if ((howto & RB_HALT) == 0) { + token = rtas_token_lookup("system-reboot"); + if (token == -1) + return; + + rtas_call_method(token, 0, 1, &status); + } +} |