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 29struct 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 39int pwdog_probe(struct device *, void *, void *); 40void pwdog_attach(struct device *, struct device *, void *); 41int pwdog_activate(struct device *, int); 42int pwdog_set_timeout(void *, int); 43 44const struct cfattach pwdog_ca = { 45 sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach, 46 NULL, pwdog_activate 47}; 48 49struct cfdriver pwdog_cd = { 50 NULL, "pwdog", DV_DULL 51}; 52 53const struct pci_matchid pwdog_devices[] = { 54 { PCI_VENDOR_QUANCOM, PCI_PRODUCT_QUANCOM_PWDOG1 } 55}; 56 57int 58pwdog_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 64void 65pwdog_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 85int 86pwdog_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 97int 98pwdog_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