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Annotation of sys/dev/pci/pwdog.c, Revision 1.1.1.1

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: }