Annotation of sys/dev/pci/pwdog.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: pwdog.c,v 1.6 2006/12/17 15:56:23 mbalmer 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/types.h>
20: #include <sys/param.h>
21: #include <sys/device.h>
22: #include <sys/kernel.h>
23: #include <sys/proc.h>
24: #include <sys/systm.h>
25:
26: #include <machine/bus.h>
27:
28: #include <dev/pci/pcivar.h>
29: #include <dev/pci/pcireg.h>
30: #include <dev/pci/pcidevs.h>
31:
32: struct pwdog_softc {
33: struct device pwdog_dev;
34: bus_space_tag_t iot;
35: bus_space_handle_t ioh;
36: };
37:
38: /* registers */
39: #define PWDOG_ACTIVATE 0
40: #define PWDOG_DISABLE 1
41:
42: int pwdog_probe(struct device *, void *, void *);
43: void pwdog_attach(struct device *, struct device *, void *);
44: int pwdog_set_timeout(void *, int);
45:
46: struct cfattach pwdog_ca = {
47: sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach
48: };
49:
50: struct cfdriver pwdog_cd = {
51: NULL, "pwdog", DV_DULL
52: };
53:
54: const struct pci_matchid pwdog_devices[] = {
55: { PCI_VENDOR_QUANCOM, PCI_PRODUCT_QUANCOM_PWDOG1 }
56: };
57:
58: int
59: pwdog_probe(struct device *parent, void *match, void *aux)
60: {
61: return pci_matchbyid((struct pci_attach_args *)aux, pwdog_devices,
62: sizeof(pwdog_devices) / sizeof(pwdog_devices[0]));
63: }
64:
65: void
66: pwdog_attach(struct device *parent, struct device *self, void *aux)
67: {
68: struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
69: struct pci_attach_args *const pa = (struct pci_attach_args *)aux;
70: pcireg_t memtype;
71: bus_size_t iosize;
72:
73: memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START);
74: if (pci_mapreg_map(pa, PCI_MAPREG_START, memtype, 0, &pwdog->iot,
75: &pwdog->ioh, NULL, &iosize, 0)) {
76: printf("\n%s: PCI %s region not found\n",
77: pwdog->pwdog_dev.dv_xname,
78: memtype == PCI_MAPREG_TYPE_IO ? "I/O" : "memory");
79: return;
80: }
81: printf("\n");
82: bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
83: wdog_register(pwdog, pwdog_set_timeout);
84: }
85:
86: int
87: pwdog_set_timeout(void *self, int seconds)
88: {
89: struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
90: int s;
91:
92: s = splclock();
93: if (seconds)
94: bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0);
95: else
96: bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
97: splx(s);
98: return seconds;
99: }
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