1 /* $OpenBSD: pwdog.c,v 1.8 2012/10/17 22:32:01 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/types.h> 20 #include <sys/param.h> 21 #include <sys/device.h> 22 #include <sys/kernel.h> 23 #include <sys/systm.h> 24 25 #include <machine/bus.h> 26 27 #include <dev/pci/pcivar.h> 28 #include <dev/pci/pcireg.h> 29 #include <dev/pci/pcidevs.h> 30 31 struct pwdog_softc { 32 struct device pwdog_dev; 33 bus_space_tag_t iot; 34 bus_space_handle_t ioh; 35 }; 36 37 /* registers */ 38 #define PWDOG_ACTIVATE 0 39 #define PWDOG_DISABLE 1 40 41 int pwdog_probe(struct device *, void *, void *); 42 void pwdog_attach(struct device *, struct device *, void *); 43 int pwdog_set_timeout(void *, int); 44 45 struct cfattach pwdog_ca = { 46 sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach 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 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 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 *const 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 86 pwdog_set_timeout(void *self, int seconds) 87 { 88 struct pwdog_softc *pwdog = (struct pwdog_softc *)self; 89 int s; 90 91 s = splclock(); 92 if (seconds) 93 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0); 94 else 95 bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0); 96 splx(s); 97 return seconds; 98 } 99