1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 30 #include <sys/systm.h> 31 #include <sys/module.h> 32 #include <sys/bus.h> 33 #include <sys/conf.h> 34 #include <sys/clock.h> 35 #include <sys/cpu.h> 36 #include <sys/eventhandler.h> 37 #include <sys/kernel.h> 38 #include <sys/reboot.h> 39 #include <sys/sysctl.h> 40 41 #include <dev/ofw/ofw_bus.h> 42 #include <dev/ofw/openfirm.h> 43 44 #include <machine/rtas.h> 45 46 #include "clock_if.h" 47 48 static int rtasdev_probe(device_t); 49 static int rtasdev_attach(device_t); 50 /* clock interface */ 51 static int rtas_gettime(device_t dev, struct timespec *ts); 52 static int rtas_settime(device_t dev, struct timespec *ts); 53 54 static void rtas_shutdown(void *arg, int howto); 55 56 static device_method_t rtasdev_methods[] = { 57 /* Device interface */ 58 DEVMETHOD(device_probe, rtasdev_probe), 59 DEVMETHOD(device_attach, rtasdev_attach), 60 61 /* clock interface */ 62 DEVMETHOD(clock_gettime, rtas_gettime), 63 DEVMETHOD(clock_settime, rtas_settime), 64 65 { 0, 0 }, 66 }; 67 68 static driver_t rtasdev_driver = { 69 "rtas", 70 rtasdev_methods, 71 0 72 }; 73 74 DRIVER_MODULE(rtasdev, ofwbus, rtasdev_driver, 0, 0); 75 76 static int 77 rtasdev_probe(device_t dev) 78 { 79 const char *name = ofw_bus_get_name(dev); 80 81 if (strcmp(name, "rtas") != 0) 82 return (ENXIO); 83 if (!rtas_exists()) 84 return (ENXIO); 85 86 device_set_desc(dev, "Run-Time Abstraction Services"); 87 return (0); 88 } 89 90 static int 91 rtasdev_attach(device_t dev) 92 { 93 if (rtas_token_lookup("get-time-of-day") != -1) 94 clock_register(dev, 2000); 95 96 EVENTHANDLER_REGISTER(shutdown_final, rtas_shutdown, NULL, 97 SHUTDOWN_PRI_LAST); 98 99 return (0); 100 } 101 102 static int 103 rtas_gettime(device_t dev, struct timespec *ts) { 104 struct clocktime ct; 105 cell_t tod[8]; 106 cell_t token; 107 int error; 108 109 token = rtas_token_lookup("get-time-of-day"); 110 if (token == -1) 111 return (ENXIO); 112 error = rtas_call_method(token, 0, 8, &tod[0], &tod[1], &tod[2], 113 &tod[3], &tod[4], &tod[5], &tod[6], &tod[7]); 114 if (error < 0) 115 return (ENXIO); 116 if (tod[0] != 0) 117 return ((tod[0] == -1) ? ENXIO : EAGAIN); 118 119 ct.year = tod[1]; 120 ct.mon = tod[2]; 121 ct.day = tod[3]; 122 ct.hour = tod[4]; 123 ct.min = tod[5]; 124 ct.sec = tod[6]; 125 ct.nsec = tod[7]; 126 127 return (clock_ct_to_ts(&ct, ts)); 128 } 129 130 static int 131 rtas_settime(device_t dev, struct timespec *ts) 132 { 133 struct clocktime ct; 134 cell_t token, status; 135 int error; 136 137 token = rtas_token_lookup("set-time-of-day"); 138 if (token == -1) 139 return (ENXIO); 140 141 clock_ts_to_ct(ts, &ct); 142 error = rtas_call_method(token, 7, 1, ct.year, ct.mon, ct.day, ct.hour, 143 ct.min, ct.sec, ct.nsec, &status); 144 if (error < 0) 145 return (ENXIO); 146 if (status != 0) 147 return (((int)status < 0) ? ENXIO : EAGAIN); 148 149 return (0); 150 } 151 152 static void 153 rtas_shutdown(void *arg, int howto) 154 { 155 cell_t token, status; 156 157 if ((howto & RB_POWEROFF) != 0) { 158 token = rtas_token_lookup("power-off"); 159 if (token == -1) 160 return; 161 162 rtas_call_method(token, 2, 1, 0, 0, &status); 163 } else if ((howto & RB_HALT) == 0) { 164 token = rtas_token_lookup("system-reboot"); 165 if (token == -1) 166 return; 167 168 rtas_call_method(token, 0, 1, &status); 169 } 170 } 171