This is a prototype implementation of the draft-mogul-pps-api-##.txt

paper.

It will be updated along with the draft and possible subsequent
standard.

The ppbus based pps driver is updated to implement this API.

3 files changed, 129 insertions, 50 deletions

diff --git a/sys/dev/ppbus/ppbconf.h b/sys/dev/ppbus/ppbconf.h
index 57d98b7..5a69d85 100644
--- a/sys/dev/ppbus/ppbconf.h
+++ b/sys/dev/ppbus/ppbconf.h
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: ppbconf.h,v 1.4 1997/09/01 00:51:48 bde Exp $
+ *	$Id: ppbconf.h,v 1.5 1997/09/01 18:39:37 bde Exp $
  *
  */
 #ifndef __PPBCONF_H
@@ -59,6 +59,7 @@
 #define AUTOFEED	0x02
 #define nINIT		0x04
 #define SELECTIN	0x08
+#define IRQENABLE	0x10
 #define PCD		0x20
 
 /*
diff --git a/sys/dev/ppbus/pps.c b/sys/dev/ppbus/pps.c
index 2894abf..931b829 100644
--- a/sys/dev/ppbus/pps.c
+++ b/sys/dev/ppbus/pps.c
@@ -6,7 +6,7 @@
  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
  * ----------------------------------------------------------------------------
  *
- * $Id: pps.c,v 1.3 1998/02/15 14:54:09 phk Exp $
+ * $Id: pps.c,v 1.4 1998/02/16 23:51:00 eivind Exp $
  *
  */
 
@@ -17,6 +17,7 @@
 #include <sys/systm.h>
 #include <sys/conf.h>
 #include <sys/uio.h>
+#include <sys/timepps.h>
 #ifdef DEVFS
 #include <sys/devfsext.h>
 #endif
@@ -25,18 +26,21 @@
 #include <dev/ppbus/ppbconf.h>
 #include "pps.h"
 
-#define PPS_NAME	"pps"		/* our official name */
+#define PPS_NAME	"lppps"		/* our official name */
 
 static struct pps_data {
 	int	pps_unit;
 	struct	ppb_device pps_dev;	
-	struct  ppsclockev {
-		struct	timespec timestamp;
-		u_int	serial;
-	} ev;
-	int	sawtooth;
+	pps_params_t	ppsparam;
+	pps_info_t	ppsinfo;
 } *softc[NPPS];
 
+static int ppscap =
+	PPS_CAPTUREASSERT |
+	PPS_HARDPPSONASSERT | 
+	PPS_OFFSETASSERT | 
+	PPS_ECHOASSERT;
+
 static int npps;
 
 /*
@@ -56,13 +60,12 @@ DATA_SET(ppbdriver_set, ppsdriver);
 
 static	d_open_t	ppsopen;
 static	d_close_t	ppsclose;
-static	d_read_t	ppsread;
-static	d_write_t	ppswrite;
+static	d_ioctl_t	ppsioctl;
 
 #define CDEV_MAJOR 89
 static struct cdevsw pps_cdevsw = 
-	{ ppsopen,	ppsclose,	ppsread,	ppswrite,
-	  noioctl,	nullstop,	nullreset,	nodevtotty,
+	{ ppsopen,	ppsclose,	noread,		nowrite,
+	  ppsioctl,	nullstop,	nullreset,	nodevtotty,
 	  seltrue,	nommap,		nostrat,	PPS_NAME,
 	  NULL,		-1 };
 
@@ -122,7 +125,7 @@ ppsopen(dev_t dev, int flags, int fmt, struct proc *p)
 	if (ppb_request_bus(&sc->pps_dev, PPB_WAIT|PPB_INTR))
 		return (EINTR);
 
-	ppb_wctr(&sc->pps_dev, 0x10);
+	ppb_wctr(&sc->pps_dev, IRQENABLE);
 
 	return(0);
 }
@@ -132,6 +135,7 @@ ppsclose(dev_t dev, int flags, int fmt, struct proc *p)
 {
 	struct pps_data *sc = softc[minor(dev)];
 
+	sc->ppsparam.mode = 0;
 	ppb_release_bus(&sc->pps_dev);
 	return(0);
 }
@@ -139,60 +143,67 @@ ppsclose(dev_t dev, int flags, int fmt, struct proc *p)
 static void
 ppsintr(int unit)
 {
-/*
- * XXX: You want to thing carefully about what you actually want to do
- * here.
- */
-#if 1
 	struct pps_data *sc = softc[unit];
 	struct timespec tc;
-#if 1
 	struct timeval tv;
-#endif
 
 	nanotime(&tc);
 	if (!(ppb_rstr(&sc->pps_dev) & nACK))
 		return;
-	tc.tv_nsec -= sc->sawtooth;
-	sc->sawtooth = 0;
-	if (tc.tv_nsec > 1000000000) {
-		tc.tv_sec++;
-		tc.tv_nsec -= 1000000000;
-	} else if (tc.tv_nsec < 0) {
+	if (sc->ppsparam.mode & PPS_ECHOASSERT) 
+		ppb_wctr(&sc->pps_dev, IRQENABLE | AUTOFEED);
+	timespecadd(&tc, &sc->ppsparam.assert_offset);
+	if (tc.tv_nsec < 0) {
 		tc.tv_sec--;
 		tc.tv_nsec += 1000000000;
 	}
-	sc->ev.timestamp = tc;
-	sc->ev.serial++;
-#if 1
-	tv.tv_sec = tc.tv_sec;
-	tv.tv_usec = tc.tv_nsec / 1000;
-	hardpps(&tv, tv.tv_usec);
-#endif
-#endif
+	sc->ppsinfo.assert_timestamp = tc;
+	sc->ppsinfo.assert_sequence++;
+	if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) {
+		tv.tv_sec = tc.tv_sec;
+		tv.tv_usec = tc.tv_nsec / 1000;
+		hardpps(&tv, tv.tv_usec);
+	}
+	if (sc->ppsparam.mode & PPS_ECHOASSERT) 
+		ppb_wctr(&sc->pps_dev, IRQENABLE);
 }
 
-static	int
-ppsread(dev_t dev, struct uio *uio, int ioflag)
+static int
+ppsioctl(dev_t dev, int cmd, caddr_t data, int flags, struct proc *p)
 {
 	struct pps_data *sc = softc[minor(dev)];
-	int err, c;
+	pps_params_t *pp;
+	pps_info_t *pi;
 
-	c = imin(uio->uio_resid, (int)sizeof sc->ev);
-	err = uiomove((caddr_t)&sc->ev, c, uio);	
-	return(err);
+	switch (cmd) {
+	case PPS_IOC_CREATE:
+		return (0);
+	case PPS_IOC_DESTROY:
+		return (0);
+	case PPS_IOC_SETPARAMS:
+		pp = (pps_params_t *)data;
+		if (pp->mode & ~ppscap) 
+			return (EINVAL);
+		sc->ppsparam = *pp;
+		return (0);
+	case PPS_IOC_GETPARAMS:
+		pp = (pps_params_t *)data;
+		*pp = sc->ppsparam;
+		return (0);
+	case PPS_IOC_GETCAP:
+		*(int*)data = ppscap;
+		return (0);
+	case PPS_IOC_FETCH:
+		pi = (pps_info_t *)data;
+		*pi = sc->ppsinfo;
+		return (0);
+	case PPS_IOC_WAIT:
+		return (EOPNOTSUPP);
+	default:
+		return (ENODEV);
+	}
 }
 
-static	int
-ppswrite(dev_t dev, struct uio *uio, int ioflag)
-{
-	struct pps_data *sc = softc[minor(dev)];
-	int err, c;
-
-	c = imin(uio->uio_resid, (int)sizeof sc->sawtooth);
-	err = uiomove((caddr_t)&sc->sawtooth, c, uio);	
-	return(err);
-}
 
 static pps_devsw_installed = 0;
 
diff --git a/sys/sys/timepps.h b/sys/sys/timepps.h
new file mode 100644
index 0000000..b2bf4e3
--- /dev/null
+++ b/sys/sys/timepps.h
@@ -0,0 +1,67 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ *
+ * $Id$
+ *
+ * The is a FreeBSD protype version of the "draft-mogul-pps-api-02.txt" 
+ * specification for Pulse Per Second timing interfaces.  
+ *
+ */
+
+#ifndef _SYS_TIMEPPS_H_
+#define _SYS_TIMEPPS_H_
+
+#include <sys/ioccom.h>
+
+typedef int pps_handle_t;	
+
+typedef unsigned pps_seq_t;
+
+typedef struct {
+	pps_seq_t	assert_sequence;
+	pps_seq_t	clear_sequence;
+	struct timespec	assert_timestamp;
+	struct timespec	clear_timestamp;
+	int		current_mode;
+} pps_info_t;
+
+typedef struct {
+	int		mode;
+	struct timespec	assert_offset;
+	struct timespec	clear_offset;
+} pps_params_t;
+
+#define PPS_CAPTUREASSERT	0x01
+#define PPS_CAPTURECLEAR	0x01
+#define PPS_CAPTUREBOTH		0x03
+
+#define PPS_HARDPPSONASSERT	0x04
+#define PPS_HARDPPSONCLEAR	0x08
+
+#define PPS_OFFSETASSERT	0x10
+#define PPS_OFFSETCLEAR		0x20
+
+#define PPS_ECHOASSERT		0x40
+#define PPS_ECHOCLEAR		0x80
+
+#define PPS_CANWAIT		0x100
+
+struct pps_wait_args {
+	struct timespec	timeout;
+	pps_info_t	pps_info_buf;
+};
+
+#define PPS_IOC_CREATE		_IO('1', 1)
+#define PPS_IOC_DESTROY		_IO('1', 2)
+#define PPS_IOC_SETPARAMS	_IOW('1', 3, pps_params_t)
+#define PPS_IOC_GETPARAMS	_IOR('1', 4, pps_params_t)
+#define PPS_IOC_GETCAP		_IOR('1', 5, int)
+#define PPS_IOC_FETCH		_IOWR('1', 6, pps_info_t)
+#define PPS_IOC_WAIT		_IOWR('1', 6, struct pps_wait_args)
+
+#endif /* _SYS_TIMEPPS_H_ */