112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* $OpenBSD: pwdog.c,v 1.12 2022/03/11 18:00:51 mpi Exp $ */
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/*
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* Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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struct pwdog_softc {
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struct device pwdog_dev;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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};
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/* registers */
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#define PWDOG_ACTIVATE 0
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#define PWDOG_DISABLE 1
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int pwdog_probe(struct device *, void *, void *);
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void pwdog_attach(struct device *, struct device *, void *);
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int pwdog_activate(struct device *, int);
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int pwdog_set_timeout(void *, int);
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const struct cfattach pwdog_ca = {
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sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach,
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NULL, pwdog_activate
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};
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struct cfdriver pwdog_cd = {
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NULL, "pwdog", DV_DULL
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};
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const struct pci_matchid pwdog_devices[] = {
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{ PCI_VENDOR_QUANCOM, PCI_PRODUCT_QUANCOM_PWDOG1 }
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};
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int
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pwdog_probe(struct device *parent, void *match, void *aux)
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{
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return pci_matchbyid((struct pci_attach_args *)aux, pwdog_devices,
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sizeof(pwdog_devices) / sizeof(pwdog_devices[0]));
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}
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void
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pwdog_attach(struct device *parent, struct device *self, void *aux)
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{
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struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
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struct pci_attach_args *pa = (struct pci_attach_args *)aux;
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pcireg_t memtype;
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bus_size_t iosize;
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memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START);
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if (pci_mapreg_map(pa, PCI_MAPREG_START, memtype, 0, &pwdog->iot,
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&pwdog->ioh, NULL, &iosize, 0)) {
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printf("\n%s: PCI %s region not found\n",
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pwdog->pwdog_dev.dv_xname,
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memtype == PCI_MAPREG_TYPE_IO ? "I/O" : "memory");
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return;
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}
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printf("\n");
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bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
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wdog_register(pwdog_set_timeout, pwdog);
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}
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int
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pwdog_activate(struct device *self, int act)
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{
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switch (act) {
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case DVACT_POWERDOWN:
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wdog_shutdown(self);
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break;
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}
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return (0);
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}
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int
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pwdog_set_timeout(void *self, int seconds)
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{
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struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
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int s;
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s = splclock();
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if (seconds)
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bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0);
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else
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bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
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splx(s);
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return seconds;
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}
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