dev/pci/pwdog.c

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This source file includes following definitions.
pwdog_probe
pwdog_attach
pwdog_set_timeout
    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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root/dev/pci/pwdog.c

DEFINITIONS
