Annotation of sys/dev/pci/pwdog.c, Revision 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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