[Asterisk-bsd] FXS dialtone interruptions at 1-second intervals

[Staffan Ulfberg]

Kim Culhan <w8hdkim at yahoo.com> writes:

> > - Added the INTR_FAST flag to the bus_setup_intr() call in
> > wcfxs.c (zaptel).  (Might not be the best/final solution,
> > but it works for me.)
> 
> Could you supply a diff after adding the INTR_FAST flag?

Sure, this is against the svn repository:

Index: trunk/wcfxs/wcfxs.c
===================================================================
--- trunk/wcfxs/wcfxs.c	(revision 1043)
+++ trunk/wcfxs/wcfxs.c	(working copy)
@@ -2455,7 +2455,7 @@
 
 	/* Now we should set up the interrupt handler */
 
-	error = bus_setup_intr(dev, sc->wc_irq, INTR_TYPE_MISC,
+	error = bus_setup_intr(dev, sc->wc_irq, INTR_TYPE_MISC | INTR_FAST,
 		(void (*)(void *))wcfxs_interrupt, sc, &(sc->irq_handler));
 	if (error) {
 		printf("Couldn't set up irq\n");



BTW, I also had to apply the following patch in order to make the svn
sources compile:

Index: trunk/wcfxs/wcfxs.c
===================================================================
--- trunk/wcfxs/wcfxs.c	(revision 1043)
+++ trunk/wcfxs/wcfxs.c	(working copy)
@@ -1090,6 +1090,7 @@
 	}
 	/* Proslic max allowed loop current, reg 71 LOOP_I_LIMIT */
 	/* If out of range, just set it to the default value     */
+	{
 	int lim;
 	lim = (loopcurrent - 20) / 3;
 	if ( loopcurrent > 41 ) {
@@ -1100,6 +1103,7 @@
 	else if (debug)
 		printf("Loop current set to %dmA!\n",(lim*3)+20);
 	wcfxs_setreg(sc, card, LOOP_I_LIMIT, lim);
+	}


Can anyone comment on how anyone is able to compile the latest cource
without this?

> > - Started Asterisk on rtprio 0.  If you do this, you should
> > probably also modify the source so that Astrisk lowers its priority
> > to normal after forking.  There are unfinished patches for this on
> > bugs.digium.com.
> 
> Tried to find this on the bugs site and ran out of time, would you
> have a pointer to where this is on the site?

http://bugs.digium.com/bug_view_page.php?bug_id=0003203

If you apply my FreeBSD patch (available on the web page above), you
probably also want this patch to res_agi.c to restore priority to
normal after forking an agi script:

--- res_agi.c.orig	Sat Mar 26 15:47:45 2005
+++ res_agi.c	Fri Mar 25 22:36:44 2005
@@ -52,6 +52,8 @@
 #include <asterisk/astmm.h>
 #endif
 
+#include <sys/rtprio.h>
+
 #define MAX_ARGS 128
 #define MAX_COMMANDS 128
 
@@ -258,6 +260,14 @@
 		return -1;
 	}
 	if (!pid) {
+		struct rtprio rtp;
+		rtp.type = RTP_PRIO_NORMAL;
+		rtp.prio = 0;
+		if (rtprio(RTP_SET, 0, &rtp) == -1) {
+			ast_log(LOG_WARNING, "Unable to set normal priority\n");
+			return -1;
+		}
+
 		/* Redirect stdin and out, provide enhanced audio channel if desired */
 		dup2(fromast[0], STDIN_FILENO);
 		dup2(toast[1], STDOUT_FILENO);


Notice that bug 3203 contains patches for restoring priority to normal
after many other forks as well (but the patches available there do not
work on FreeBSD).  Since I use Asterisk mostly for agi scripting, this
was what I needed.

Staffan