1 /* $OpenBSD: pwdog.c,v 1.10 2017/09/08 05:36:52 deraadt 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/kernel.h> 22 #include <sys/systm.h> 23 24 #include <machine/bus.h> 25 26 #include <dev/pci/pcivar.h> 27 #include <dev/pci/pcireg.h> 28 #include <dev/pci/pcidevs.h> 29 30 struct pwdog_softc { 31 struct device pwdog_dev; 32 bus_space_tag_t iot; 33 bus_space_handle_t ioh; 34 }; 35 36 /* registers */ 37 #define PWDOG_ACTIVATE 0 38 #define PWDOG_DISABLE 1 39 40 int pwdog_probe(struct device *, void *, void *); 41 void pwdog_attach(struct device *, struct device *, void *); 42 int pwdog_activate(struct device *, int); 43 int pwdog_set_timeout(void *, int); 44 45 struct cfattach pwdog_ca = { 46 sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach, 47 NULL, pwdog_activate 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_set_timeout, pwdog); 84 } 85 86 int 87 pwdog_activate(struct device *self, int act) 88 { 89 switch (act) { 90 case DVACT_POWERDOWN: 91 wdog_shutdown(self); 92 break; 93 } 94 95 return (0); 96 } 97 98 int 99 pwdog_set_timeout(void *self, int seconds) 100 { 101 struct pwdog_softc *pwdog = (struct pwdog_softc *)self; 102 int s; 103 104 s = splclock(); 105 if (seconds) 106 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0); 107 else 108 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0); 109 splx(s); 110 return seconds; 111 } 112