Annotation of sys/arch/sparc64/dev/power.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: power.c,v 1.5 2007/04/24 18:30:45 kettenis Exp $ */
2:
3: /*
4: * Copyright (c) 2006 Jason L. Wright (jason@thought.net)
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 ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26: * POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29: /*
30: * Driver for power-button device on U5, U10, etc.
31: */
32:
33: #include <sys/types.h>
34: #include <sys/param.h>
35: #include <sys/systm.h>
36: #include <sys/kernel.h>
37: #include <sys/device.h>
38: #include <sys/conf.h>
39: #include <sys/timeout.h>
40: #include <sys/proc.h>
41: #include <sys/signalvar.h>
42:
43: #include <machine/bus.h>
44: #include <machine/autoconf.h>
45: #include <machine/openfirm.h>
46:
47: #include <sparc64/dev/ebusreg.h>
48: #include <sparc64/dev/ebusvar.h>
49:
50: #define POWER_REG 0
51:
52: #define POWER_REG_CPWR_OFF 0x00000002 /* courtesy power off */
53: #define POWER_REG_SPWR_OFF 0x00000001 /* system power off */
54:
55: struct power_softc {
56: struct device sc_dev;
57: bus_space_tag_t sc_iot;
58: bus_space_handle_t sc_ioh;
59: struct intrhand *sc_ih;
60: };
61:
62: int power_match(struct device *, void *, void *);
63: void power_attach(struct device *, struct device *, void *);
64: int power_intr(void *);
65:
66: struct cfattach power_ca = {
67: sizeof(struct power_softc), power_match, power_attach
68: };
69:
70: struct cfdriver power_cd = {
71: NULL, "power", DV_DULL
72: };
73:
74: int
75: power_match(parent, match, aux)
76: struct device *parent;
77: void *match;
78: void *aux;
79: {
80: struct ebus_attach_args *ea = aux;
81:
82: if (strcmp(ea->ea_name, "power") == 0)
83: return (1);
84: return (0);
85: }
86:
87: void
88: power_attach(parent, self, aux)
89: struct device *parent, *self;
90: void *aux;
91: {
92: struct power_softc *sc = (void *)self;
93: struct ebus_attach_args *ea = aux;
94:
95: if (ea->ea_nregs < 1) {
96: printf(": no registers\n");
97: return;
98: }
99:
100: /* Use prom address if available, otherwise map it. */
101: if (ea->ea_nvaddrs) {
102: if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
103: BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) {
104: printf(": can't map PROM register space\n");
105: return;
106: }
107: sc->sc_iot = ea->ea_memtag;
108: } else if (ebus_bus_map(ea->ea_iotag, 0,
109: EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
110: ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
111: sc->sc_iot = ea->ea_iotag;
112: } else if (ebus_bus_map(ea->ea_memtag, 0,
113: EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
114: ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
115: sc->sc_iot = ea->ea_memtag;
116: } else {
117: printf("%s: can't map register space\n", self->dv_xname);
118: return;
119: }
120:
121: if (ea->ea_nintrs > 0 && OF_getproplen(ea->ea_node, "button") >= 0) {
122: sc->sc_ih = bus_intr_establish(sc->sc_iot, ea->ea_intrs[0],
123: IPL_BIO, 0, power_intr, sc, self->dv_xname);
124: if (sc->sc_ih == NULL) {
125: printf(": can't establish interrupt\n");
126: return;
127: }
128: }
129: printf("\n");
130: }
131:
132: int
133: power_intr(void *vsc)
134: {
135: extern int kbd_reset;
136:
137: if (kbd_reset == 1) {
138: kbd_reset = 0;
139: psignal(initproc, SIGUSR2);
140: }
141: return (1);
142: }
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