282 lines
6.8 KiB
C
282 lines
6.8 KiB
C
/* $NetBSD: pps_ppbus.c,v 1.7 2006/06/07 22:33:37 kardel Exp $ */
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/*
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* ported to timecounters by Frank Kardel 2006
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*
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* Copyright (c) 2004
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* Matthias Drochner. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pps_ppbus.c,v 1.7 2006/06/07 22:33:37 kardel Exp $");
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#include "opt_ntp.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/timepps.h>
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#include <dev/ppbus/ppbus_base.h>
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#include <dev/ppbus/ppbus_device.h>
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#include <dev/ppbus/ppbus_io.h>
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#include <dev/ppbus/ppbus_var.h>
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struct pps_softc {
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struct ppbus_device_softc pps_dev;
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struct device *ppbus;
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int busy;
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#ifdef __HAVE_TIMECOUNTER
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struct pps_state pps_state; /* pps state */
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#else /* !__HAVE_TIMECOUNTER */
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pps_info_t ppsinfo;
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pps_params_t ppsparam;
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#ifdef PPS_SYNC
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int hardpps;
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#endif
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#endif /* !__HAVE_TIMECOUNTER */
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};
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static int pps_probe(struct device *, struct cfdata *, void *);
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static void pps_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(pps, sizeof(struct pps_softc), pps_probe, pps_attach,
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NULL, NULL);
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extern struct cfdriver pps_cd;
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static dev_type_open(ppsopen);
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static dev_type_close(ppsclose);
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static dev_type_ioctl(ppsioctl);
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const struct cdevsw pps_cdevsw = {
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ppsopen, ppsclose, noread, nowrite, ppsioctl,
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nostop, notty, nopoll, nommap, nokqfilter
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};
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static void ppsintr(void *arg);
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#ifndef __HAVE_TIMECOUNTER
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static int ppscap = PPS_TSFMT_TSPEC | PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
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#endif
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static int
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pps_probe(struct device *parent, struct cfdata *match, void *aux)
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{
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struct ppbus_attach_args *args = aux;
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/* we need an interrupt */
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if (!(args->capabilities & PPBUS_HAS_INTR))
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return 0;
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return 1;
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}
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static void
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pps_attach(struct device *parent, struct device *self, void *aux)
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{
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struct pps_softc *sc = device_private(self);
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sc->ppbus = parent;
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printf("\n");
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}
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static int
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ppsopen(dev_t dev, int flags, int fmt, struct lwp *l)
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{
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struct pps_softc *sc;
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int res, weg = 0;
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sc = device_lookup(&pps_cd, minor(dev));
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if (!sc)
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return (ENXIO);
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if (sc->busy)
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return (0);
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if (ppbus_request_bus(sc->ppbus, &sc->pps_dev.sc_dev,
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PPBUS_WAIT|PPBUS_INTR, 0))
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return (EINTR);
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ppbus_write_ivar(sc->ppbus, PPBUS_IVAR_IEEE, &weg);
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/* attach the interrupt handler */
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/* XXX priority should be set here */
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res = ppbus_add_handler(sc->ppbus, ppsintr, sc);
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if (res) {
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ppbus_release_bus(sc->ppbus, &sc->pps_dev.sc_dev,
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PPBUS_WAIT, 0);
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return (res);
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}
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ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0);
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ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN);
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#ifdef __HAVE_TIMECOUNTER
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memset((void *)&sc->pps_state, 0, sizeof(sc->pps_state));
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sc->pps_state.ppscap = PPS_CAPTUREASSERT;
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pps_init(&sc->pps_state);
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#endif /* __HAVE_TIMECOUNTER */
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sc->busy = 1;
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return (0);
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}
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static int
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ppsclose(dev_t dev, int flags, int fmt, struct lwp *l)
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{
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struct pps_softc *sc = device_lookup(&pps_cd, minor(dev));
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struct device *ppbus = sc->ppbus;
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sc->busy = 0;
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#ifdef __HAVE_TIMECOUNTER
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sc->pps_state.ppsparam.mode = 0;
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#else /* !__HAVE_TIMECOUNTER */
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sc->ppsparam.mode = 0;
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#ifdef PPS_SYNC
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sc->hardpps = 0;
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#endif
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#endif /* __HAVE_TIMECOUNTER */
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ppbus_wdtr(ppbus, 0);
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ppbus_wctr(ppbus, 0);
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ppbus_remove_handler(ppbus, ppsintr);
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ppbus_set_mode(ppbus, PPBUS_COMPATIBLE, 0);
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ppbus_release_bus(ppbus, &sc->pps_dev.sc_dev, PPBUS_WAIT, 0);
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return (0);
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}
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static void
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ppsintr(void *arg)
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{
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struct pps_softc *sc = arg;
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struct device *ppbus = sc->ppbus;
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#ifndef __HAVE_TIMECOUNTER
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struct timeval tv;
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#else /* __HAVE_TIMECOUNTER */
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pps_capture(&sc->pps_state);
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#endif /* __HAVE_TIMECOUNTER */
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if (!(ppbus_rstr(ppbus) & nACK))
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return;
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#ifdef __HAVE_TIMECOUNTER
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if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT)
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ppbus_wctr(ppbus, IRQENABLE | AUTOFEED);
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pps_event(&sc->pps_state, PPS_CAPTUREASSERT);
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if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT)
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ppbus_wctr(ppbus, IRQENABLE);
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#else /* !__HAVE_TIMECOUNTER */
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microtime(&tv);
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TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.assert_timestamp);
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if (sc->ppsparam.mode & PPS_OFFSETASSERT) {
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timespecadd(&sc->ppsinfo.assert_timestamp,
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&sc->ppsparam.assert_offset,
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&sc->ppsinfo.assert_timestamp);
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}
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#ifdef PPS_SYNC
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if (sc->hardpps)
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hardpps(&tv, tv.tv_usec);
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#endif
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sc->ppsinfo.assert_sequence++;
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sc->ppsinfo.current_mode = sc->ppsparam.mode;
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#endif /* !__HAVE_TIMECOUNTER */
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}
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static int
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ppsioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct lwp *l)
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{
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struct pps_softc *sc = device_lookup(&pps_cd, minor(dev));
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int error = 0;
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switch (cmd) {
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#ifdef __HAVE_TIMECOUNTER
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case PPS_IOC_CREATE:
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case PPS_IOC_DESTROY:
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case PPS_IOC_GETPARAMS:
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case PPS_IOC_SETPARAMS:
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case PPS_IOC_GETCAP:
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case PPS_IOC_FETCH:
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#ifdef PPS_SYNC
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case PPS_IOC_KCBIND:
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#endif
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error = pps_ioctl(cmd, data, &sc->pps_state);
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break;
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#else /* !__HAVE_TIMECOUNTER */
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case PPS_IOC_CREATE:
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break;
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case PPS_IOC_DESTROY:
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break;
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case PPS_IOC_GETPARAMS: {
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pps_params_t *pp;
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pp = (pps_params_t *)data;
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*pp = sc->ppsparam;
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break;
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}
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case PPS_IOC_SETPARAMS: {
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pps_params_t *pp;
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pp = (pps_params_t *)data;
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if (pp->mode & ~(ppscap)) {
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error = EINVAL;
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break;
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}
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sc->ppsparam = *pp;
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break;
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}
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case PPS_IOC_GETCAP:
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*(int*)data = ppscap;
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break;
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case PPS_IOC_FETCH: {
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pps_info_t *pi;
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pi = (pps_info_t *)data;
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*pi = sc->ppsinfo;
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break;
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}
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#ifdef PPS_SYNC
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case PPS_IOC_KCBIND:
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if (*(int *)data & PPS_CAPTUREASSERT)
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sc->hardpps = 1;
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else
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sc->hardpps = 0;
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break;
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#endif
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#endif /* !__HAVE_TIMECOUNTER */
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default:
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error = EPASSTHROUGH;
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break;
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}
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return (error);
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}
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