1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/module.h> 35 #include <sys/bus.h> 36 #include <sys/conf.h> 37 #include <sys/clock.h> 38 #include <sys/cpu.h> 39 #include <sys/eventhandler.h> 40 #include <sys/kernel.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/openfirm.h> 46 47 #include <machine/rtas.h> 48 49 #include "clock_if.h" 50 51 static int rtasdev_probe(device_t); 52 static int rtasdev_attach(device_t); 53 /* clock interface */ 54 static int rtas_gettime(device_t dev, struct timespec *ts); 55 static int rtas_settime(device_t dev, struct timespec *ts); 56 57 static void rtas_shutdown(void *arg, int howto); 58 59 static device_method_t rtasdev_methods[] = { 60 /* Device interface */ 61 DEVMETHOD(device_probe, rtasdev_probe), 62 DEVMETHOD(device_attach, rtasdev_attach), 63 64 /* clock interface */ 65 DEVMETHOD(clock_gettime, rtas_gettime), 66 DEVMETHOD(clock_settime, rtas_settime), 67 68 { 0, 0 }, 69 }; 70 71 static driver_t rtasdev_driver = { 72 "rtas", 73 rtasdev_methods, 74 0 75 }; 76 77 DRIVER_MODULE(rtasdev, ofwbus, rtasdev_driver, 0, 0); 78 79 static int 80 rtasdev_probe(device_t dev) 81 { 82 const char *name = ofw_bus_get_name(dev); 83 84 if (strcmp(name, "rtas") != 0) 85 return (ENXIO); 86 if (!rtas_exists()) 87 return (ENXIO); 88 89 device_set_desc(dev, "Run-Time Abstraction Services"); 90 return (0); 91 } 92 93 static int 94 rtasdev_attach(device_t dev) 95 { 96 if (rtas_token_lookup("get-time-of-day") != -1) 97 clock_register(dev, 2000); 98 99 EVENTHANDLER_REGISTER(shutdown_final, rtas_shutdown, NULL, 100 SHUTDOWN_PRI_LAST); 101 102 return (0); 103 } 104 105 static int 106 rtas_gettime(device_t dev, struct timespec *ts) { 107 struct clocktime ct; 108 cell_t tod[8]; 109 cell_t token; 110 int error; 111 112 token = rtas_token_lookup("get-time-of-day"); 113 if (token == -1) 114 return (ENXIO); 115 error = rtas_call_method(token, 0, 8, &tod[0], &tod[1], &tod[2], 116 &tod[3], &tod[4], &tod[5], &tod[6], &tod[7]); 117 if (error < 0) 118 return (ENXIO); 119 if (tod[0] != 0) 120 return ((tod[0] == -1) ? ENXIO : EAGAIN); 121 122 ct.year = tod[1]; 123 ct.mon = tod[2]; 124 ct.day = tod[3]; 125 ct.hour = tod[4]; 126 ct.min = tod[5]; 127 ct.sec = tod[6]; 128 ct.nsec = tod[7]; 129 130 return (clock_ct_to_ts(&ct, ts)); 131 } 132 133 static int 134 rtas_settime(device_t dev, struct timespec *ts) 135 { 136 struct clocktime ct; 137 cell_t token, status; 138 int error; 139 140 token = rtas_token_lookup("set-time-of-day"); 141 if (token == -1) 142 return (ENXIO); 143 144 clock_ts_to_ct(ts, &ct); 145 error = rtas_call_method(token, 7, 1, ct.year, ct.mon, ct.day, ct.hour, 146 ct.min, ct.sec, ct.nsec, &status); 147 if (error < 0) 148 return (ENXIO); 149 if (status != 0) 150 return (((int)status < 0) ? ENXIO : EAGAIN); 151 152 return (0); 153 } 154 155 static void 156 rtas_shutdown(void *arg, int howto) 157 { 158 cell_t token, status; 159 160 if (howto & RB_HALT) { 161 token = rtas_token_lookup("power-off"); 162 if (token == -1) 163 return; 164 165 rtas_call_method(token, 2, 1, 0, 0, &status); 166 } else { 167 token = rtas_token_lookup("system-reboot"); 168 if (token == -1) 169 return; 170 171 rtas_call_method(token, 0, 1, &status); 172 } 173 } 174