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
rtasdev_probe(device_t dev)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
rtasdev_attach(device_t dev)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
rtas_gettime(device_t dev,struct timespec * ts)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
rtas_settime(device_t dev,struct timespec * ts)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
rtas_shutdown(void * arg,int howto)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