acpi_rapidstart.c revision 273736 
1/*-
2 * Copyright (c) 2013 Takanori Watanabe
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/sys/dev/acpi_support/acpi_rapidstart.c 273736 2014-10-27 14:38:00Z hselasky $");
29
30#include "opt_acpi.h"
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/bus.h>
34
35#include <contrib/dev/acpica/include/acpi.h>
36
37#include "acpi_if.h"
38#include <sys/module.h>
39#include <dev/acpica/acpivar.h>
40#include <sys/sysctl.h>
41static int sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS);
42
43
44static struct acpi_rapidstart_name_list
45{
46	char *nodename;
47	char *getmethod;
48	char *setmethod;
49	char *comment;
50} acpi_rapidstart_oids[] ={
51	{"ffs","GFFS","SFFS","Flash Fast Store Flag"},
52	{"ftv","GFTV","SFTV","Time value"},
53	{NULL, NULL, NULL, NULL}
54};
55
56struct acpi_rapidstart_softc {
57	struct sysctl_ctx_list	*sysctl_ctx;
58	struct sysctl_oid	*sysctl_tree;
59
60};
61static char    *rapidstart_ids[] = {"INT3392", NULL};
62static int
63acpi_rapidstart_probe(device_t dev)
64{
65	if (acpi_disabled("rapidstart") ||
66	    ACPI_ID_PROBE(device_get_parent(dev), dev, rapidstart_ids) == NULL ||
67	    device_get_unit(dev) != 0)
68		return (ENXIO);
69
70	device_set_desc(dev, "Intel Rapid Start ACPI device");
71
72	return (0);
73
74}
75
76static int
77acpi_rapidstart_attach(device_t dev)
78{
79	struct acpi_rapidstart_softc *sc;
80	int i;
81
82	sc = device_get_softc(dev);
83
84	sc->sysctl_ctx = device_get_sysctl_ctx(dev);
85	sc->sysctl_tree = device_get_sysctl_tree(dev);
86	for (i = 0 ; acpi_rapidstart_oids[i].nodename != NULL; i++){
87		if (acpi_rapidstart_oids[i].setmethod != NULL) {
88			SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
89			    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
90			    i, acpi_rapidstart_oids[i].nodename,
91			    CTLTYPE_INT | CTLFLAG_RW,
92			    dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
93			    acpi_rapidstart_oids[i].comment);
94		} else {
95			SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
96			    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
97			    i, acpi_rapidstart_oids[i].nodename,
98			    CTLTYPE_INT | CTLFLAG_RD,
99			    dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
100			    acpi_rapidstart_oids[i].comment);
101		}
102	}
103	return (0);
104}
105
106static int
107sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS)
108{
109	device_t	dev = arg1;
110	int 	function = oidp->oid_arg2;
111	int		error = 0, val;
112
113	acpi_GetInteger(acpi_get_handle(dev),
114	    acpi_rapidstart_oids[function].getmethod, &val);
115	error = sysctl_handle_int(oidp, &val, 0, req);
116	if (error || !req->newptr || !acpi_rapidstart_oids[function].setmethod)
117		return (error);
118	acpi_SetInteger(acpi_get_handle(dev),
119	    acpi_rapidstart_oids[function].setmethod, val);
120	return (0);
121}
122
123static device_method_t acpi_rapidstart_methods[] = {
124	/* Device interface */
125	DEVMETHOD(device_probe, acpi_rapidstart_probe),
126	DEVMETHOD(device_attach, acpi_rapidstart_attach),
127
128	DEVMETHOD_END
129};
130
131static driver_t	acpi_rapidstart_driver = {
132	"acpi_rapidstart",
133	acpi_rapidstart_methods,
134	sizeof(struct acpi_rapidstart_softc),
135};
136
137static devclass_t acpi_rapidstart_devclass;
138
139DRIVER_MODULE(acpi_rapidstart, acpi, acpi_rapidstart_driver, acpi_rapidstart_devclass,
140	      0, 0);
141MODULE_DEPEND(acpi_rapidstart, acpi, 1, 1, 1);
142
143