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[src/trunk]: src/sys/dev/ppbus add a "pps" device to get pulse-per-second sig...
details: https://anonhg.NetBSD.org/src/rev/c60e89a7bfc9
branches: trunk
changeset: 558093:c60e89a7bfc9
user: drochner <drochner%NetBSD.org@localhost>
date: Wed Jan 28 17:27:06 2004 +0000
description:
add a "pps" device to get pulse-per-second signals into ntpd
diffstat:
sys/dev/ppbus/files.ppbus | 7 +-
sys/dev/ppbus/pps_ppbus.c | 231 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 237 insertions(+), 1 deletions(-)
diffs (256 lines):
diff -r 3fffbc15c2f1 -r c60e89a7bfc9 sys/dev/ppbus/files.ppbus
--- a/sys/dev/ppbus/files.ppbus Wed Jan 28 17:26:45 2004 +0000
+++ b/sys/dev/ppbus/files.ppbus Wed Jan 28 17:27:06 2004 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.ppbus,v 1.3 2004/01/21 00:33:37 bjh21 Exp $
+# $NetBSD: files.ppbus,v 1.4 2004/01/28 17:27:06 drochner Exp $
#
# Config file and device description for machine-independent parallel port bus
# code.
@@ -34,6 +34,11 @@
attach plip at ppbus
file dev/ppbus/if_plip.c plip needs-flag
+# pps interface
+device pps
+attach pps at ppbus
+file dev/ppbus/pps_ppbus.c pps
+
# AT-compatible parallel port chipset
defflag opt_atppc.h ATPPC_DEBUG ATPPC_VERBOSE
device atppc: parport
diff -r 3fffbc15c2f1 -r c60e89a7bfc9 sys/dev/ppbus/pps_ppbus.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ppbus/pps_ppbus.c Wed Jan 28 17:27:06 2004 +0000
@@ -0,0 +1,231 @@
+/* $NetBSD: pps_ppbus.c,v 1.1 2004/01/28 17:27:06 drochner Exp $ */
+
+/*
+ * Copyright (c) 2004
+ * Matthias Drochner. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: pps_ppbus.c,v 1.1 2004/01/28 17:27:06 drochner Exp $");
+
+#include "opt_ntp.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/timepps.h>
+
+#include <dev/ppbus/ppbus_base.h>
+#include <dev/ppbus/ppbus_device.h>
+#include <dev/ppbus/ppbus_io.h>
+#include <dev/ppbus/ppbus_var.h>
+
+struct pps_softc {
+ struct ppbus_device_softc pps_dev;
+ struct device *ppbus;
+ int busy;
+ pps_info_t ppsinfo;
+ pps_params_t ppsparam;
+#ifdef PPS_SYNC
+ int hardpps;
+#endif
+};
+
+static int pps_probe(struct device *, struct cfdata *, void *);
+static void pps_attach(struct device *, struct device *, void *);
+CFATTACH_DECL(pps, sizeof(struct pps_softc), pps_probe, pps_attach,
+ NULL, NULL);
+extern struct cfdriver pps_cd;
+
+static dev_type_open(ppsopen);
+static dev_type_close(ppsclose);
+static dev_type_ioctl(ppsioctl);
+const struct cdevsw pps_cdevsw = {
+ ppsopen, ppsclose, noread, nowrite, ppsioctl,
+ nostop, notty, nopoll, nommap, nokqfilter
+};
+
+static void ppsintr(void *arg);
+
+static int ppscap = PPS_TSFMT_TSPEC | PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
+
+static int
+pps_probe(struct device *parent, struct cfdata *match, void *aux)
+{
+ struct ppbus_attach_args *args = aux;
+
+ /* we need an interrupt */
+ if (!(args->capabilities & PPBUS_HAS_INTR))
+ return 0;
+
+ return 1;
+}
+
+static void
+pps_attach(struct device *parent, struct device *self, void *aux)
+{
+ struct pps_softc *sc = (struct pps_softc *)self;
+
+ sc->ppbus = parent;
+
+ printf("\n");
+}
+
+static int
+ppsopen(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct pps_softc *sc;
+ int res;
+
+ sc = device_lookup(&pps_cd, minor(dev));
+ if (!sc)
+ return (ENXIO);
+
+ if (sc->busy)
+ return (0);
+
+ if (ppbus_request_bus(sc->ppbus, &sc->pps_dev.sc_dev,
+ PPBUS_WAIT|PPBUS_INTR, 0))
+ return (EINTR);
+
+ /* attach the interrupt handler */
+ /* XXX priority should be set here */
+ res = ppbus_add_handler(sc->ppbus, ppsintr, sc);
+ if (res) {
+ ppbus_release_bus(sc->ppbus, &sc->pps_dev.sc_dev,
+ PPBUS_WAIT, 0);
+ return (res);
+ }
+
+ ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0);
+ ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN);
+
+ sc->busy = 1;
+ return (0);
+}
+
+static int
+ppsclose(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct pps_softc *sc = device_lookup(&pps_cd, minor(dev));
+ struct device *ppbus = sc->ppbus;
+
+ sc->ppsparam.mode = 0;
+ sc->busy = 0;
+#ifdef PPS_SYNC
+ sc->hardpps = 0;
+#endif
+ ppbus_wdtr(ppbus, 0);
+ ppbus_wctr(ppbus, 0);
+
+ ppbus_remove_handler(ppbus, ppsintr);
+ ppbus_set_mode(ppbus, PPBUS_COMPATIBLE, 0);
+ ppbus_release_bus(ppbus, &sc->pps_dev.sc_dev, PPBUS_WAIT, 0);
+ return (0);
+}
+
+static void
+ppsintr(void *arg)
+{
+ struct pps_softc *sc = arg;
+ struct device *ppbus = sc->ppbus;
+ struct timeval tv;
+
+ if (!(ppbus_rstr(ppbus) & nACK))
+ return;
+
+ microtime(&tv);
+ TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.assert_timestamp);
+ if (sc->ppsparam.mode & PPS_OFFSETASSERT) {
+ timespecadd(&sc->ppsinfo.assert_timestamp,
+ &sc->ppsparam.assert_offset,
+ &sc->ppsinfo.assert_timestamp);
+ }
+#ifdef PPS_SYNC
+ if (sc->hardpps)
+ hardpps(&tv, tv.tv_usec);
+#endif
+ sc->ppsinfo.assert_sequence++;
+ sc->ppsinfo.current_mode = sc->ppsparam.mode;
+}
+
+static int
+ppsioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+ struct pps_softc *sc = device_lookup(&pps_cd, minor(dev));
+ int error = 0;
+
+ switch (cmd) {
+ case PPS_IOC_CREATE:
+ break;
+
+ case PPS_IOC_DESTROY:
+ break;
+
+ case PPS_IOC_GETPARAMS: {
+ pps_params_t *pp;
+ pp = (pps_params_t *)data;
+ *pp = sc->ppsparam;
+ break;
+ }
+
+ case PPS_IOC_SETPARAMS: {
+ pps_params_t *pp;
+ pp = (pps_params_t *)data;
+ if (pp->mode & ~(ppscap)) {
+ error = EINVAL;
+ break;
+ }
+ sc->ppsparam = *pp;
+ break;
+ }
+
+ case PPS_IOC_GETCAP:
+ *(int*)data = ppscap;
+ break;
+
+ case PPS_IOC_FETCH: {
+ pps_info_t *pi;
+ pi = (pps_info_t *)data;
+ *pi = sc->ppsinfo;
+ break;
+ }
+
+#ifdef PPS_SYNC
+ case PPS_IOC_KCBIND:
+ if (*(int *)data & PPS_CAPTUREASSERT)
+ sc->hardpps = 1;
+ else
+ sc->hardpps = 0;
+ break;
+#endif
+
+ default:
+ error = EPASSTHROUGH;
+ break;
+ }
+ return (error);
+}
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