prtc.c revision 1.1 
1/*	$OpenBSD: prtc.c,v 1.1 2008/03/13 22:46:16 kettenis Exp $	*/
2
3/*
4 * Copyright (c) 2008 Mark Kettenis
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19/*
20 * Driver to get the time-of-day from the PROM for machines that don't
21 * have a hardware real-time clock, like the Enterprise 10000,
22 * Fire 12K and Fire 15K.
23 */
24
25#include <sys/param.h>
26#include <sys/device.h>
27#include <sys/malloc.h>
28#include <sys/systm.h>
29
30#include <machine/autoconf.h>
31#include <machine/openfirm.h>
32
33#include <dev/clock_subr.h>
34
35extern todr_chip_handle_t todr_handle;
36
37int	prtc_match(struct device *, void *, void *);
38void	prtc_attach(struct device *, struct device *, void *);
39
40struct cfattach prtc_ca = {
41	sizeof(struct device), prtc_match, prtc_attach
42};
43
44struct cfdriver prtc_cd = {
45	NULL, "prtc", DV_DULL
46};
47
48int	prtc_gettime(todr_chip_handle_t, struct timeval *);
49int	prtc_settime(todr_chip_handle_t, struct timeval *);
50
51int
52prtc_match(struct device *parent, void *match, void *aux)
53{
54	struct mainbus_attach_args *ma = aux;
55
56	if (strcmp(ma->ma_name, "prtc") == 0)
57		return (1);
58
59	return (0);
60}
61
62void
63prtc_attach(struct device *parent, struct device *self, void *aux)
64{
65	todr_chip_handle_t handle;
66
67	printf("\n");
68
69	handle = malloc(sizeof(struct todr_chip_handle), M_DEVBUF, M_NOWAIT);
70	if (handle == NULL)
71		panic("couldn't allocate todr_handle");
72
73	handle->cookie = self;
74	handle->todr_gettime = prtc_gettime;
75	handle->todr_settime = prtc_settime;
76
77	handle->bus_cookie = NULL;
78	handle->todr_setwen = NULL;
79	todr_handle = handle;
80}
81
82int
83prtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
84{
85	char cmd[32];
86	u_int32_t tod = 0;
87
88	snprintf(cmd, sizeof(cmd), "h# %08x unix-gettod", &tod);
89	OF_interpret(cmd, 0);
90
91	tv->tv_sec = tod;
92	tv->tv_usec = 0;
93	return (0);
94}
95
96int
97prtc_settime(todr_chip_handle_t handle, struct timeval *tv)
98{
99	return (0);
100}
101