Add a skelleton pulse-per-second timing driver. This will become more
useful when I get my timecounter changes past the Bruce-filter.
This commit is contained in:
Poul-Henning Kamp
parent
a4daaa09f2
commit
507e2e4443
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=33323
@ -2,7 +2,7 @@
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# LINT -- config file for checking all the sources, tries to pull in
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# as much of the source tree as it can.
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#
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# $Id: LINT,v 1.405 1998/02/11 17:37:55 yokota Exp $
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# $Id: LINT,v 1.406 1998/02/11 20:47:42 dima Exp $
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#
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# NB: You probably don't want to try running a kernel built from this
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# file. Instead, you should start from GENERIC, and add options from
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@ -1361,6 +1361,7 @@ controller ppbus0
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controller vpo0 at ppbus?
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device nlpt0 at ppbus?
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device ppi0 at ppbus?
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device pps0 at ppbus?
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controller ppc0 at isa? disable port ? irq 7 vector ppcintr
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@ -43,6 +43,7 @@ dev/ppbus/ppb_base.c optional ppbus
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dev/ppbus/ppb_1284.c optional ppbus
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dev/ppbus/ppbconf.c optional ppbus
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dev/ppbus/ppi.c optional ppi
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dev/ppbus/pps.c optional pps
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dev/ppbus/vpo.c optional vpo
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dev/vn/vn.c optional vn
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dev/vx/if_vx.c optional vx device-driver
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@ -1,4 +1,4 @@
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$Id: majors.i386,v 1.24 1998/01/16 22:13:01 pst Exp $
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$Id: majors.i386,v 1.25 1998/01/26 06:11:14 julian Exp $
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Hopefully, this list will one day be obsoleted by DEVFS, but for now
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this is the current allocation of device major numbers.
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@ -128,3 +128,4 @@ chrdev name comments
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86 alog Industrial Computer Source AIO8-P driver
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87 wfd ATAPI floppy client of "ata"
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88 dpt DPT RAID Controller <shimon@i-connect.net>
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89 pps Pulse-Per-Second timing interface
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222
sys/dev/ppbus/pps.c
Normal file
222
sys/dev/ppbus/pps.c
Normal file
@ -0,0 +1,222 @@
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $Id$
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*
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/syslog.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <sys/malloc.h>
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#include <machine/clock.h>
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#include <machine/lpt.h>
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#include <dev/ppbus/ppbconf.h>
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#include "ppps.h"
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#define PPPPS_NAME "pps" /* our official name */
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static struct ppps_data {
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int ppps_unit;
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struct ppb_device ppps_dev;
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struct ppsclockev {
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struct timespec timestamp;
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u_int serial;
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} ev;
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int sawtooth;
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} *softc[NPPPPS];
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static int nppps;
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static int sawtooth;
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/*
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* Make ourselves visible as a ppbus driver
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*/
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static struct ppb_device *pppsprobe(struct ppb_data *ppb);
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static int pppsattach(struct ppb_device *dev);
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static void pppsintr(int unit);
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static void ppps_drvinit(void *unused);
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static struct ppb_driver pppsdriver = {
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pppsprobe, pppsattach, PPPPS_NAME
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};
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DATA_SET(ppbdriver_set, pppsdriver);
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static d_open_t pppsopen;
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static d_close_t pppsclose;
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static d_read_t pppsread;
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static d_write_t pppswrite;
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#define CDEV_MAJOR 89
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static struct cdevsw ppps_cdevsw =
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{ pppsopen, pppsclose, pppsread, pppswrite,
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noioctl, nullstop, nullreset, nodevtotty,
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seltrue, nommap, nostrat, PPPPS_NAME,
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NULL, -1 };
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static struct ppb_device *
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pppsprobe(struct ppb_data *ppb)
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{
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struct ppps_data *sc;
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sc = (struct ppps_data *) malloc(sizeof(struct ppps_data),
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M_TEMP, M_NOWAIT);
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if (!sc) {
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printf(PPPPS_NAME ": cannot malloc!\n");
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return (0);
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}
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bzero(sc, sizeof(struct ppps_data));
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softc[nppps] = sc;
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sc->ppps_unit = nppps++;
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sc->ppps_dev.id_unit = sc->ppps_unit;
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sc->ppps_dev.ppb = ppb;
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sc->ppps_dev.intr = pppsintr;
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return (&sc->ppps_dev);
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}
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static int
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pppsattach(struct ppb_device *dev)
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{
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/*
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* Report ourselves
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*/
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printf(PPPPS_NAME "%d: <Pulse per second Timing Interface> on ppbus %d\n",
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dev->id_unit, dev->ppb->ppb_link->adapter_unit);
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#ifdef DEVFS
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sc->devfs_token = devfs_add_devswf(&ppps_cdevsw,
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dev->id_unit, DV_CHR,
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UID_ROOT, GID_WHEEL, 0600, PPPPS_NAME "%d", dev->id_unit);
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sc->devfs_token_ctl = devfs_add_devswf(&ppps_cdevsw,
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dev->id_unit | LP_BYPASS, DV_CHR,
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UID_ROOT, GID_WHEEL, 0600, PPPPS_NAME "%d.ctl", dev->id_unit);
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#endif
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return (1);
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}
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static int
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pppsopen(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct ppps_data *sc;
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u_int unit = minor(dev);
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if ((unit >= nppps))
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return (ENXIO);
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sc = softc[unit];
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if (ppb_request_bus(&sc->ppps_dev, PPB_WAIT|PPB_INTR))
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return (EINTR);
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ppb_wctr(&sc->ppps_dev, 0x10);
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return(0);
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}
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static int
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pppsclose(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct ppps_data *sc = softc[minor(dev)];
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ppb_release_bus(&sc->ppps_dev);
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return(0);
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}
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static void
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pppsintr(int unit)
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{
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/*
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* XXX: You want to thing carefully about what you actually want to do
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* here.
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*/
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#if 0
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struct ppps_data *sc = softc[unit];
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struct timespec tc;
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#if 1
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struct timeval tv;
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#endif
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nanotime(&tc);
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if (!(ppb_rstr(&sc->ppps_dev) & nACK))
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return;
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tc.tv_nsec -= sc->sawtooth;
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tc.tv_nsec += 10000;
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sc->sawtooth = 0;
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if (tc.tv_nsec > 1000000000) {
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tc.tv_sec++;
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tc.tv_nsec -= 1000000000;
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} else if (tc.tv_nsec < 0) {
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tc.tv_sec--;
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tc.tv_nsec += 1000000000;
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}
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sc->ev.timestamp = tc;
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sc->ev.serial++;
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#if 1
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tv.tv_sec = tc.tv_sec;
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tv.tv_usec = tc.tv_nsec / 1000;
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hardpps(&tv, tv.tv_usec);
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#endif
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#endif
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}
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static int
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pppsread(dev_t dev, struct uio *uio, int ioflag)
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{
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struct ppps_data *sc = softc[minor(dev)];
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int err, c;
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c = imin(uio->uio_resid, sizeof sc->ev);
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err = uiomove(&sc->ev, c, uio);
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return(err);
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}
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static int
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pppswrite(dev_t dev, struct uio *uio, int ioflag)
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{
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struct ppps_data *sc = softc[minor(dev)];
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int err, c;
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c = imin(uio->uio_resid, sizeof sc->sawtooth);
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err = uiomove(&sc->sawtooth, c, uio);
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return(err);
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}
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static ppps_devsw_installed = 0;
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static void
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ppps_drvinit(void *unused)
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{
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dev_t dev;
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if( ! ppps_devsw_installed ) {
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dev = makedev(CDEV_MAJOR, 0);
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cdevsw_add(&dev,&ppps_cdevsw, NULL);
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ppps_devsw_installed = 1;
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}
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}
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SYSINIT(pppsdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ppps_drvinit,NULL)
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@ -2,7 +2,7 @@
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# LINT -- config file for checking all the sources, tries to pull in
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# as much of the source tree as it can.
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#
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# $Id: LINT,v 1.405 1998/02/11 17:37:55 yokota Exp $
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# $Id: LINT,v 1.406 1998/02/11 20:47:42 dima Exp $
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#
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# NB: You probably don't want to try running a kernel built from this
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# file. Instead, you should start from GENERIC, and add options from
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@ -1361,6 +1361,7 @@ controller ppbus0
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controller vpo0 at ppbus?
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device nlpt0 at ppbus?
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device ppi0 at ppbus?
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device pps0 at ppbus?
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controller ppc0 at isa? disable port ? irq 7 vector ppcintr
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@ -2,7 +2,7 @@
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# LINT -- config file for checking all the sources, tries to pull in
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# as much of the source tree as it can.
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#
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# $Id: LINT,v 1.405 1998/02/11 17:37:55 yokota Exp $
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# $Id: LINT,v 1.406 1998/02/11 20:47:42 dima Exp $
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#
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# NB: You probably don't want to try running a kernel built from this
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# file. Instead, you should start from GENERIC, and add options from
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@ -1361,6 +1361,7 @@ controller ppbus0
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controller vpo0 at ppbus?
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device nlpt0 at ppbus?
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device ppi0 at ppbus?
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device pps0 at ppbus?
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controller ppc0 at isa? disable port ? irq 7 vector ppcintr
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@ -1,4 +1,4 @@
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$Id: majors.i386,v 1.24 1998/01/16 22:13:01 pst Exp $
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$Id: majors.i386,v 1.25 1998/01/26 06:11:14 julian Exp $
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Hopefully, this list will one day be obsoleted by DEVFS, but for now
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this is the current allocation of device major numbers.
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@ -128,3 +128,4 @@ chrdev name comments
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86 alog Industrial Computer Source AIO8-P driver
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87 wfd ATAPI floppy client of "ata"
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88 dpt DPT RAID Controller <shimon@i-connect.net>
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89 pps Pulse-Per-Second timing interface
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Loading…
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Block a user