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/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/conf.h> 35 #include <sys/clock.h> 36 #include <sys/cpu.h> 37 #include <sys/eventhandler.h> 38 #include <sys/kernel.h> 39 #include <sys/reboot.h> 40 #include <sys/sysctl.h> 41 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/openfirm.h> 44 45 #include <machine/rtas.h> 46 47 #include "clock_if.h" 48 49 static int rtasdev_probe(device_t); 50 static int rtasdev_attach(device_t); 51 /* clock interface */ 52 static int rtas_gettime(device_t dev, struct timespec *ts); 53 static int rtas_settime(device_t dev, struct timespec *ts); 54 55 static void rtas_shutdown(void *arg, int howto); 56 57 static device_method_t rtasdev_methods[] = { 58 /* Device interface */ 59 DEVMETHOD(device_probe, rtasdev_probe), 60 DEVMETHOD(device_attach, rtasdev_attach), 61 62 /* clock interface */ 63 DEVMETHOD(clock_gettime, rtas_gettime), 64 DEVMETHOD(clock_settime, rtas_settime), 65 66 { 0, 0 }, 67 }; 68 69 static driver_t rtasdev_driver = { 70 "rtas", 71 rtasdev_methods, 72 0 73 }; 74 75 DRIVER_MODULE(rtasdev, ofwbus, rtasdev_driver, 0, 0); 76 77 static int 78 rtasdev_probe(device_t dev) 79 { 80 const char *name = ofw_bus_get_name(dev); 81 82 if (strcmp(name, "rtas") != 0) 83 return (ENXIO); 84 if (!rtas_exists()) 85 return (ENXIO); 86 87 device_set_desc(dev, "Run-Time Abstraction Services"); 88 return (0); 89 } 90 91 static int 92 rtasdev_attach(device_t dev) 93 { 94 if (rtas_token_lookup("get-time-of-day") != -1) 95 clock_register(dev, 2000); 96 97 EVENTHANDLER_REGISTER(shutdown_final, rtas_shutdown, NULL, 98 SHUTDOWN_PRI_LAST); 99 100 return (0); 101 } 102 103 static int 104 rtas_gettime(device_t dev, struct timespec *ts) { 105 struct clocktime ct; 106 cell_t tod[8]; 107 cell_t token; 108 int error; 109 110 token = rtas_token_lookup("get-time-of-day"); 111 if (token == -1) 112 return (ENXIO); 113 error = rtas_call_method(token, 0, 8, &tod[0], &tod[1], &tod[2], 114 &tod[3], &tod[4], &tod[5], &tod[6], &tod[7]); 115 if (error < 0) 116 return (ENXIO); 117 if (tod[0] != 0) 118 return ((tod[0] == -1) ? ENXIO : EAGAIN); 119 120 ct.year = tod[1]; 121 ct.mon = tod[2]; 122 ct.day = tod[3]; 123 ct.hour = tod[4]; 124 ct.min = tod[5]; 125 ct.sec = tod[6]; 126 ct.nsec = tod[7]; 127 128 return (clock_ct_to_ts(&ct, ts)); 129 } 130 131 static int 132 rtas_settime(device_t dev, struct timespec *ts) 133 { 134 struct clocktime ct; 135 cell_t token, status; 136 int error; 137 138 token = rtas_token_lookup("set-time-of-day"); 139 if (token == -1) 140 return (ENXIO); 141 142 clock_ts_to_ct(ts, &ct); 143 error = rtas_call_method(token, 7, 1, ct.year, ct.mon, ct.day, ct.hour, 144 ct.min, ct.sec, ct.nsec, &status); 145 if (error < 0) 146 return (ENXIO); 147 if (status != 0) 148 return (((int)status < 0) ? ENXIO : EAGAIN); 149 150 return (0); 151 } 152 153 static void 154 rtas_shutdown(void *arg, int howto) 155 { 156 cell_t token, status; 157 158 if (howto & RB_HALT) { 159 token = rtas_token_lookup("power-off"); 160 if (token == -1) 161 return; 162 163 rtas_call_method(token, 2, 1, 0, 0, &status); 164 } else { 165 token = rtas_token_lookup("system-reboot"); 166 if (token == -1) 167 return; 168 169 rtas_call_method(token, 0, 1, &status); 170 } 171 } 172