1 /* $OpenBSD: pwdog.c,v 1.13 2024/05/24 06:02:58 jsg Exp $ */
2
3 /*
4 * Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org>
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 #include <sys/param.h>
20 #include <sys/device.h>
21 #include <sys/systm.h>
22
23 #include <machine/bus.h>
24
25 #include <dev/pci/pcivar.h>
26 #include <dev/pci/pcireg.h>
27 #include <dev/pci/pcidevs.h>
28
29 struct pwdog_softc {
30 struct device pwdog_dev;
31 bus_space_tag_t iot;
32 bus_space_handle_t ioh;
33 };
34
35 /* registers */
36 #define PWDOG_ACTIVATE 0
37 #define PWDOG_DISABLE 1
38
39 int pwdog_probe(struct device *, void *, void *);
40 void pwdog_attach(struct device *, struct device *, void *);
41 int pwdog_activate(struct device *, int);
42 int pwdog_set_timeout(void *, int);
43
44 const struct cfattach pwdog_ca = {
45 sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach,
46 NULL, pwdog_activate
47 };
48
49 struct cfdriver pwdog_cd = {
50 NULL, "pwdog", DV_DULL
51 };
52
53 const struct pci_matchid pwdog_devices[] = {
54 { PCI_VENDOR_QUANCOM, PCI_PRODUCT_QUANCOM_PWDOG1 }
55 };
56
57 int
pwdog_probe(struct device * parent,void * match,void * aux)58 pwdog_probe(struct device *parent, void *match, void *aux)
59 {
60 return pci_matchbyid((struct pci_attach_args *)aux, pwdog_devices,
61 sizeof(pwdog_devices) / sizeof(pwdog_devices[0]));
62 }
63
64 void
pwdog_attach(struct device * parent,struct device * self,void * aux)65 pwdog_attach(struct device *parent, struct device *self, void *aux)
66 {
67 struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
68 struct pci_attach_args *pa = (struct pci_attach_args *)aux;
69 pcireg_t memtype;
70 bus_size_t iosize;
71
72 memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START);
73 if (pci_mapreg_map(pa, PCI_MAPREG_START, memtype, 0, &pwdog->iot,
74 &pwdog->ioh, NULL, &iosize, 0)) {
75 printf("\n%s: PCI %s region not found\n",
76 pwdog->pwdog_dev.dv_xname,
77 memtype == PCI_MAPREG_TYPE_IO ? "I/O" : "memory");
78 return;
79 }
80 printf("\n");
81 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
82 wdog_register(pwdog_set_timeout, pwdog);
83 }
84
85 int
pwdog_activate(struct device * self,int act)86 pwdog_activate(struct device *self, int act)
87 {
88 switch (act) {
89 case DVACT_POWERDOWN:
90 wdog_shutdown(self);
91 break;
92 }
93
94 return (0);
95 }
96
97 int
pwdog_set_timeout(void * self,int seconds)98 pwdog_set_timeout(void *self, int seconds)
99 {
100 struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
101 int s;
102
103 s = splclock();
104 if (seconds)
105 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0);
106 else
107 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
108 splx(s);
109 return seconds;
110 }
111