Annotation of sys/arch/hppa/dev/power.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: power.c,v 1.5 2004/06/11 12:53:09 mickey Exp $ */
2:
3: /*
4: * Copyright (c) 2003 Michael Shalayeff
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 WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES 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 MIND, 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
25: * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26: * THE POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29: #include <sys/param.h>
30: #include <sys/kernel.h>
31: #include <sys/systm.h>
32: #include <sys/reboot.h>
33: #include <sys/device.h>
34: #include <sys/kthread.h>
35:
36: #include <machine/reg.h>
37: #include <machine/pdc.h>
38: #include <machine/autoconf.h>
39:
40: #include <hppa/dev/cpudevs.h>
41:
42: struct power_softc {
43: struct device sc_dev;
44: void *sc_ih;
45:
46: struct proc *sc_thread;
47: void (*sc_kicker)(void *);
48:
49: int sc_dr_cnt;
50: paddr_t sc_pwr_reg;
51: volatile int sc_interrupted;
52: };
53:
54: int powermatch(struct device *, void *, void *);
55: void powerattach(struct device *, struct device *, void *);
56:
57: struct cfattach power_ca = {
58: sizeof(struct power_softc), powermatch, powerattach
59: };
60:
61: struct cfdriver power_cd = {
62: NULL, "power", DV_DULL
63: };
64:
65: void power_thread_create(void *v);
66: void power_thread_dr(void *v);
67: void power_thread_reg(void *v);
68: void power_cold_hook_reg(int);
69: int power_intr(void *);
70:
71: int
72: powermatch(struct device *parent, void *cfdata, void *aux)
73: {
74: struct cfdata *cf = cfdata;
75: struct confargs *ca = aux;
76:
77: if (cf->cf_unit > 0 && !strcmp(ca->ca_name, "power"))
78: return (0);
79:
80: return (1);
81: }
82:
83: void
84: powerattach(struct device *parent, struct device *self, void *aux)
85: {
86: struct power_softc *sc = (struct power_softc *)self;
87: struct confargs *ca = aux;
88:
89: switch (cpu_hvers) {
90: case HPPA_BOARD_HP712_60:
91: case HPPA_BOARD_HP712_80:
92: case HPPA_BOARD_HP712_100:
93: case HPPA_BOARD_HP712_120:
94: sc->sc_kicker = power_thread_dr;
95: printf(": DR25\n");
96: break;
97:
98: default:
99: if (ca->ca_hpa) {
100: extern void (*cold_hook)(int);
101:
102: sc->sc_pwr_reg = ca->ca_hpa;
103: cold_hook = power_cold_hook_reg;
104: sc->sc_kicker = power_thread_reg;
105: printf("\n");
106: } else
107: printf(": not available\n");
108: break;
109: }
110:
111: if (ca->ca_irq >= 0)
112: sc->sc_ih = cpu_intr_establish(IPL_CLOCK, ca->ca_irq,
113: power_intr, sc, sc->sc_dev.dv_xname);
114:
115: if (sc->sc_kicker)
116: kthread_create_deferred(power_thread_create, sc);
117: }
118:
119: int
120: power_intr(void *v)
121: {
122: struct power_softc *sc = v;
123:
124: sc->sc_interrupted = 1;
125:
126: return (1);
127: }
128:
129: void
130: power_thread_create(void *v)
131: {
132: struct power_softc *sc = v;
133:
134: if (kthread_create(sc->sc_kicker, sc, &sc->sc_thread,
135: sc->sc_dev.dv_xname))
136: printf("WARNING: failed to create kernel power thread\n");
137: }
138:
139: void
140: power_thread_dr(void *v)
141: {
142: struct power_softc *sc = v;
143: u_int32_t r;
144:
145: for (;;) {
146: mfcpu(DR0_PCXL_SHINT_EN, r); /* XXX don't ask */
147: if (r & 0x80000000)
148: sc->sc_dr_cnt = 0;
149: else
150: sc->sc_dr_cnt++;
151:
152: /*
153: * the bit is undampened straight wire from the power
154: * switch and thus we have do dampen it ourselves.
155: */
156: if (sc->sc_dr_cnt == hz / 10)
157: boot(RB_POWERDOWN | RB_HALT);
158:
159: tsleep(v, PWAIT, "drpower", 10);
160: }
161: }
162:
163: void
164: power_thread_reg(void *v)
165: {
166: struct power_softc *sc = v;
167: u_int32_t r;
168:
169: for (;;) {
170: __asm __volatile("ldwas 0(%1), %0"
171: : "=&r" (r) : "r" (sc->sc_pwr_reg));
172:
173: if (!(r & 1))
174: boot(RB_POWERDOWN | RB_HALT);
175:
176: tsleep(v, PWAIT, "regpower", 10);
177: }
178: }
179:
180: void
181: power_cold_hook_reg(int on)
182: {
183: extern struct pdc_power_info pdc_power_info; /* machdep.c */
184: int error;
185:
186: if ((error = pdc_call((iodcio_t)pdc, 0, PDC_SOFT_POWER,
187: PDC_SOFT_POWER_ENABLE, &pdc_power_info,
188: on == HPPA_COLD_HOT)))
189: printf("power_cold_hook_reg: failed (%d)\n", error);
190: }
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