xref: /freebsd/sys/dev/acpi_support/acpi_rapidstart.c (revision edf8578117e8844e02c0121147f45e4609b30680)
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 #include "opt_acpi.h"
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/bus.h>
32 
33 #include <contrib/dev/acpica/include/acpi.h>
34 
35 #include "acpi_if.h"
36 #include <sys/module.h>
37 #include <dev/acpica/acpivar.h>
38 #include <sys/sysctl.h>
39 static int sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS);
40 
41 static struct acpi_rapidstart_name_list
42 {
43 	char *nodename;
44 	char *getmethod;
45 	char *setmethod;
46 	char *comment;
47 } acpi_rapidstart_oids[] ={
48 	{"ffs","GFFS","SFFS","Flash Fast Store Flag"},
49 	{"ftv","GFTV","SFTV","Time value"},
50 	{NULL, NULL, NULL, NULL}
51 };
52 
53 struct acpi_rapidstart_softc {
54 	struct sysctl_ctx_list	*sysctl_ctx;
55 	struct sysctl_oid	*sysctl_tree;
56 
57 };
58 static char    *rapidstart_ids[] = {"INT3392", NULL};
59 static int
60 acpi_rapidstart_probe(device_t dev)
61 {
62 	int rv;
63 
64 	if (acpi_disabled("rapidstart") ||
65 	    device_get_unit(dev) != 0)
66 		return (ENXIO);
67 	rv = ACPI_ID_PROBE(device_get_parent(dev), dev, rapidstart_ids, NULL);
68 	if (rv <= 0)
69 		device_set_desc(dev, "Intel Rapid Start ACPI device");
70 
71 	return (rv);
72 
73 }
74 
75 static int
76 acpi_rapidstart_attach(device_t dev)
77 {
78 	struct acpi_rapidstart_softc *sc;
79 	int i;
80 
81 	sc = device_get_softc(dev);
82 
83 	sc->sysctl_ctx = device_get_sysctl_ctx(dev);
84 	sc->sysctl_tree = device_get_sysctl_tree(dev);
85 	for (i = 0 ; acpi_rapidstart_oids[i].nodename != NULL; i++){
86 		if (acpi_rapidstart_oids[i].setmethod != NULL) {
87 			SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
88 			    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
89 			    i, acpi_rapidstart_oids[i].nodename,
90 			    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
91 			    dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
92 			    acpi_rapidstart_oids[i].comment);
93 		} else {
94 			SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
95 			    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
96 			    i, acpi_rapidstart_oids[i].nodename,
97 			    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
98 			    dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
99 			    acpi_rapidstart_oids[i].comment);
100 		}
101 	}
102 	return (0);
103 }
104 
105 static int
106 sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS)
107 {
108 	device_t	dev = arg1;
109 	int 	function = oidp->oid_arg2;
110 	int		error = 0, val;
111 
112 	acpi_GetInteger(acpi_get_handle(dev),
113 	    acpi_rapidstart_oids[function].getmethod, &val);
114 	error = sysctl_handle_int(oidp, &val, 0, req);
115 	if (error || !req->newptr || !acpi_rapidstart_oids[function].setmethod)
116 		return (error);
117 	acpi_SetInteger(acpi_get_handle(dev),
118 	    acpi_rapidstart_oids[function].setmethod, val);
119 	return (0);
120 }
121 
122 static device_method_t acpi_rapidstart_methods[] = {
123 	/* Device interface */
124 	DEVMETHOD(device_probe, acpi_rapidstart_probe),
125 	DEVMETHOD(device_attach, acpi_rapidstart_attach),
126 
127 	DEVMETHOD_END
128 };
129 
130 static driver_t	acpi_rapidstart_driver = {
131 	"acpi_rapidstart",
132 	acpi_rapidstart_methods,
133 	sizeof(struct acpi_rapidstart_softc),
134 };
135 
136 DRIVER_MODULE(acpi_rapidstart, acpi, acpi_rapidstart_driver, 0, 0);
137 MODULE_DEPEND(acpi_rapidstart, acpi, 1, 1, 1);
138