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NetBSD/dist/ntp/libparse/parsestreams.c

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/* $NetBSD: parsestreams.c,v 1.2 2003/12/04 16:23:37 drochner Exp $ */
/*
* /src/NTP/ntp-4/libparse/parsestreams.c,v 4.7 1999/11/28 09:13:53 kardel RELEASE_19991128_A
*
* parsestreams.c,v 4.7 1999/11/28 09:13:53 kardel RELEASE_19991128_A
*
* STREAMS module for reference clocks
* (SunOS4.x)
*
* Copyright (c) 1989-1998 by Frank Kardel
* Friedrich-Alexander Universität Erlangen-Nürnberg, Germany
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#define KERNEL /* MUST */
#define VDDRV /* SHOULD */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifndef lint
static char rcsid[] = "parsestreams.c,v 4.7 1999/11/28 09:13:53 kardel RELEASE_19991128_A";
#endif
#ifndef KERNEL
#include "Bletch: MUST COMPILE WITH KERNEL DEFINE"
#endif
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sundev/mbvar.h>
#include <sun/autoconf.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <sys/dir.h>
#include <sys/signal.h>
#include <sys/termios.h>
#include <sys/termio.h>
#include <sys/ttold.h>
#include <sys/user.h>
#include <sys/tty.h>
#ifdef VDDRV
#include <sun/vddrv.h>
#endif
#include "ntp_stdlib.h"
#include "ntp_fp.h"
/*
* just make checking compilers more silent
*/
extern int printf P((const char *, ...));
extern int putctl1 P((queue_t *, int, int));
extern int canput P((queue_t *));
extern void putbq P((queue_t *, mblk_t *));
extern void freeb P((mblk_t *));
extern void qreply P((queue_t *, mblk_t *));
extern void freemsg P((mblk_t *));
extern void panic P((const char *, ...));
extern void usec_delay P((int));
#include "parse.h"
#include "sys/parsestreams.h"
/*
* use microtime instead of uniqtime if advised to
*/
#ifdef MICROTIME
#define uniqtime microtime
#endif
#ifdef VDDRV
static unsigned int parsebusy = 0;
/*--------------- loadable driver section -----------------------------*/
extern struct streamtab parseinfo;
#ifdef PPS_SYNC
static char mnam[] = "PARSEPPS "; /* name this baby - keep room for revision number */
#else
static char mnam[] = "PARSE "; /* name this baby - keep room for revision number */
#endif
struct vdldrv parsesync_vd =
{
VDMAGIC_PSEUDO, /* nothing like a real driver - a STREAMS module */
mnam,
};
/*
* strings support usually not in kernel
*/
static int
Strlen(
register const char *s
)
{
register int c;
c = 0;
if (s)
{
while (*s++)
{
c++;
}
}
return c;
}
static void
Strncpy(
register char *t,
register char *s,
register int c
)
{
if (s && t)
{
while ((c-- > 0) && (*t++ = *s++))
;
}
}
static int
Strcmp(
register const char *s,
register const char *t
)
{
register int c = 0;
if (!s || !t || (s == t))
{
return 0;
}
while (!(c = *s++ - *t++) && *s && *t)
/* empty loop */;
return c;
}
static int
Strncmp(
register char *s,
register char *t,
register int n
)
{
register int c = 0;
if (!s || !t || (s == t))
{
return 0;
}
while (n-- && !(c = *s++ - *t++) && *s && *t)
/* empty loop */;
return c;
}
void
ntp_memset(
char *a,
int x,
int c
)
{
while (c-- > 0)
*a++ = x;
}
/*
* driver init routine
* since no mechanism gets us into and out of the fmodsw, we have to
* do it ourselves
*/
/*ARGSUSED*/
int
xxxinit(
unsigned int fc,
struct vddrv *vdp,
addr_t vdin,
struct vdstat *vds
)
{
extern struct fmodsw fmodsw[];
extern int fmodcnt;
struct fmodsw *fm = fmodsw;
struct fmodsw *fmend = &fmodsw[fmodcnt];
struct fmodsw *ifm = (struct fmodsw *)0;
char *mname = parseinfo.st_rdinit->qi_minfo->mi_idname;
switch (fc)
{
case VDLOAD:
vdp->vdd_vdtab = (struct vdlinkage *)&parsesync_vd;
/*
* now, jog along fmodsw scanning for an empty slot
* and deposit our name there
*/
while (fm <= fmend)
{
if (!Strncmp(fm->f_name, mname, FMNAMESZ))
{
printf("vddrinit[%s]: STREAMS module already loaded.\n", mname);
return(EBUSY);
}
else
if ((ifm == (struct fmodsw *)0) &&
(fm->f_name[0] == '\0') &&
(fm->f_str == (struct streamtab *)0))
{
/*
* got one - so move in
*/
ifm = fm;
break;
}
fm++;
}
if (ifm == (struct fmodsw *)0)
{
printf("vddrinit[%s]: no slot free for STREAMS module\n", mname);
return (ENOSPC);
}
else
{
static char revision[] = "4.7";
char *s, *S, *t;
s = rcsid; /* NOOP - keep compilers happy */
Strncpy(ifm->f_name, mname, FMNAMESZ);
ifm->f_name[FMNAMESZ] = '\0';
ifm->f_str = &parseinfo;
/*
* copy RCS revision into Drv_name
*
* are we forcing RCS here to do things it was not built for ?
*/
s = revision;
if (*s == '$')
{
/*
* skip "$Revision: "
* if present. - not necessary on a -kv co (cvs export)
*/
while (*s && (*s != ' '))
{
s++;
}
if (*s == ' ') s++;
}
t = parsesync_vd.Drv_name;
while (*t && (*t != ' '))
{
t++;
}
if (*t == ' ') t++;
S = s;
while (*S && (((*S >= '0') && (*S <= '9')) || (*S == '.')))
{
S++;
}
if (*s && *t && (S > s))
{
if (Strlen(t) >= (S - s))
{
(void) Strncpy(t, s, S - s);
}
}
return (0);
}
break;
case VDUNLOAD:
if (parsebusy > 0)
{
printf("vddrinit[%s]: STREAMS module has still %d instances active.\n", mname, parsebusy);
return (EBUSY);
}
else
{
while (fm <= fmend)
{
if (!Strncmp(fm->f_name, mname, FMNAMESZ))
{
/*
* got it - kill entry
*/
fm->f_name[0] = '\0';
fm->f_str = (struct streamtab *)0;
fm++;
break;
}
fm++;
}
if (fm > fmend)
{
printf("vddrinit[%s]: cannot find entry for STREAMS module\n", mname);
return (ENXIO);
}
else
return (0);
}
case VDSTAT:
return (0);
default:
return (EIO);
}
return EIO;
}
#endif
/*--------------- stream module definition ----------------------------*/
static int parseopen P((queue_t *, dev_t, int, int));
static int parseclose P((queue_t *, int));
static int parsewput P((queue_t *, mblk_t *));
static int parserput P((queue_t *, mblk_t *));
static int parsersvc P((queue_t *));
static char mn[] = "parse";
static struct module_info driverinfo =
{
0, /* module ID number */
mn, /* module name */
0, /* minimum accepted packet size */
INFPSZ, /* maximum accepted packet size */
1, /* high water mark - flow control */
0 /* low water mark - flow control */
};
static struct qinit rinit = /* read queue definition */
{
parserput, /* put procedure */
parsersvc, /* service procedure */
parseopen, /* open procedure */
parseclose, /* close procedure */
NULL, /* admin procedure - NOT USED FOR NOW */
&driverinfo, /* information structure */
NULL /* statistics */
};
static struct qinit winit = /* write queue definition */
{
parsewput, /* put procedure */
NULL, /* service procedure */
NULL, /* open procedure */
NULL, /* close procedure */
NULL, /* admin procedure - NOT USED FOR NOW */
&driverinfo, /* information structure */
NULL /* statistics */
};
struct streamtab parseinfo = /* stream info element for dpr driver */
{
&rinit, /* read queue */
&winit, /* write queue */
NULL, /* read mux */
NULL, /* write mux */
NULL /* module auto push */
};
/*--------------- driver data structures ----------------------------*/
/*
* we usually have an inverted signal - but you
* can change this to suit your needs
*/
int cd_invert = 1; /* invert status of CD line - PPS support via CD input */
int parsedebug = ~0;
extern void uniqtime P((struct timeval *));
/*--------------- module implementation -----------------------------*/
#define TIMEVAL_USADD(_X_, _US_) {\
(_X_)->tv_usec += (_US_);\
if ((_X_)->tv_usec >= 1000000)\
{\
(_X_)->tv_sec++;\
(_X_)->tv_usec -= 1000000;\
}\
} while (0)
static int init_linemon P((queue_t *));
static void close_linemon P((queue_t *, queue_t *));
#define M_PARSE 0x0001
#define M_NOPARSE 0x0002
static int
setup_stream(
queue_t *q,
int mode
)
{
mblk_t *mp;
mp = allocb(sizeof(struct stroptions), BPRI_MED);
if (mp)
{
struct stroptions *str = (struct stroptions *)(void *)mp->b_rptr;
str->so_flags = SO_READOPT|SO_HIWAT|SO_LOWAT;
str->so_readopt = (mode == M_PARSE) ? RMSGD : RNORM;
str->so_hiwat = (mode == M_PARSE) ? sizeof(parsetime_t) : 256;
str->so_lowat = 0;
mp->b_datap->db_type = M_SETOPTS;
mp->b_wptr += sizeof(struct stroptions);
putnext(q, mp);
return putctl1(WR(q)->q_next, M_CTL, (mode == M_PARSE) ? MC_SERVICEIMM :
MC_SERVICEDEF);
}
else
{
parseprintf(DD_OPEN,("parse: setup_stream - FAILED - no MEMORY for allocb\n"));
return 0;
}
}
/*ARGSUSED*/
static int
parseopen(
queue_t *q,
dev_t dev,
int flag,
int sflag
)
{
register parsestream_t *parse;
static int notice = 0;
parseprintf(DD_OPEN,("parse: OPEN\n"));
if (sflag != MODOPEN)
{ /* open only for modules */
parseprintf(DD_OPEN,("parse: OPEN - FAILED - not MODOPEN\n"));
return OPENFAIL;
}
if (q->q_ptr != (caddr_t)NULL)
{
u.u_error = EBUSY;
parseprintf(DD_OPEN,("parse: OPEN - FAILED - EXCLUSIVE ONLY\n"));
return OPENFAIL;
}
#ifdef VDDRV
parsebusy++;
#endif
q->q_ptr = (caddr_t)kmem_alloc(sizeof(parsestream_t));
if (q->q_ptr == (caddr_t)0)
{
parseprintf(DD_OPEN,("parse: OPEN - FAILED - no memory\n"));
#ifdef VDDRV
parsebusy--;
#endif
return OPENFAIL;
}
WR(q)->q_ptr = q->q_ptr;
parse = (parsestream_t *)(void *)q->q_ptr;
bzero((caddr_t)parse, sizeof(*parse));
parse->parse_queue = q;
parse->parse_status = PARSE_ENABLE;
parse->parse_ppsclockev.tv.tv_sec = 0;
parse->parse_ppsclockev.tv.tv_usec = 0;
parse->parse_ppsclockev.serial = 0;
if (!parse_ioinit(&parse->parse_io))
{
/*
* ok guys - beat it
*/
kmem_free((caddr_t)parse, sizeof(parsestream_t));
#ifdef VDDRV
parsebusy--;
#endif
return OPENFAIL;
}
if (setup_stream(q, M_PARSE))
{
(void) init_linemon(q); /* hook up PPS ISR routines if possible */
parseprintf(DD_OPEN,("parse: OPEN - SUCCEEDED\n"));
/*
* I know that you know the delete key, but you didn't write this
* code, did you ? - So, keep the message in here.
*/
if (!notice)
{
#ifdef VDDRV
printf("%s: Copyright (C) 1991-1998, Frank Kardel\n", parsesync_vd.Drv_name);
#else
printf("%s: Copyright (C) 1991-1998, Frank Kardel\n", "parsestreams.c,v 4.7 1999/11/28 09:13:53 kardel RELEASE_19991128_A");
#endif
notice = 1;
}
return MODOPEN;
}
else
{
kmem_free((caddr_t)parse, sizeof(parsestream_t));
#ifdef VDDRV
parsebusy--;
#endif
return OPENFAIL;
}
}
/*ARGSUSED*/
static int
parseclose(
queue_t *q,
int flags
)
{
register parsestream_t *parse = (parsestream_t *)(void *)q->q_ptr;
register unsigned long s;
parseprintf(DD_CLOSE,("parse: CLOSE\n"));
s = splhigh();
if (parse->parse_dqueue)
close_linemon(parse->parse_dqueue, q);
parse->parse_dqueue = (queue_t *)0;
(void) splx(s);
parse_ioend(&parse->parse_io);
kmem_free((caddr_t)parse, sizeof(parsestream_t));
q->q_ptr = (caddr_t)NULL;
WR(q)->q_ptr = (caddr_t)NULL;
#ifdef VDDRV
parsebusy--;
#endif
return 0;
}
/*
* move unrecognized stuff upward
*/
static int
parsersvc(
queue_t *q
)
{
mblk_t *mp;
while ((mp = getq(q)))
{
if (canput(q->q_next) || (mp->b_datap->db_type > QPCTL))
{
putnext(q, mp);
parseprintf(DD_RSVC,("parse: RSVC - putnext\n"));
}
else
{
putbq(q, mp);
parseprintf(DD_RSVC,("parse: RSVC - flow control wait\n"));
break;
}
}
return 0;
}
/*
* do ioctls and
* send stuff down - dont care about
* flow control
*/
static int
parsewput(
queue_t *q,
register mblk_t *mp
)
{
register int ok = 1;
register mblk_t *datap;
register struct iocblk *iocp;
parsestream_t *parse = (parsestream_t *)(void *)q->q_ptr;
parseprintf(DD_WPUT,("parse: parsewput\n"));
switch (mp->b_datap->db_type)
{
default:
putnext(q, mp);
break;
case M_IOCTL:
iocp = (struct iocblk *)(void *)mp->b_rptr;
switch (iocp->ioc_cmd)
{
default:
parseprintf(DD_WPUT,("parse: parsewput - forward M_IOCTL\n"));
putnext(q, mp);
break;
case CIOGETEV:
/*
* taken from Craig Leres ppsclock module (and modified)
*/
datap = allocb(sizeof(struct ppsclockev), BPRI_MED);
if (datap == NULL || mp->b_cont)
{
mp->b_datap->db_type = M_IOCNAK;
iocp->ioc_error = (datap == NULL) ? ENOMEM : EINVAL;
if (datap != NULL)
freeb(datap);
qreply(q, mp);
break;
}
mp->b_cont = datap;
*(struct ppsclockev *)(void *)datap->b_wptr = parse->parse_ppsclockev;
datap->b_wptr +=
sizeof(struct ppsclockev) / sizeof(*datap->b_wptr);
mp->b_datap->db_type = M_IOCACK;
iocp->ioc_count = sizeof(struct ppsclockev);
qreply(q, mp);
break;
case PARSEIOC_ENABLE:
case PARSEIOC_DISABLE:
{
parse->parse_status = (parse->parse_status & (unsigned)~PARSE_ENABLE) |
(iocp->ioc_cmd == PARSEIOC_ENABLE) ?
PARSE_ENABLE : 0;
if (!setup_stream(RD(q), (parse->parse_status & PARSE_ENABLE) ?
M_PARSE : M_NOPARSE))
{
mp->b_datap->db_type = M_IOCNAK;
}
else
{
mp->b_datap->db_type = M_IOCACK;
}
qreply(q, mp);
break;
}
case PARSEIOC_TIMECODE:
case PARSEIOC_SETFMT:
case PARSEIOC_GETFMT:
case PARSEIOC_SETCS:
if (iocp->ioc_count == sizeof(parsectl_t))
{
parsectl_t *dct = (parsectl_t *)(void *)mp->b_cont->b_rptr;
switch (iocp->ioc_cmd)
{
case PARSEIOC_TIMECODE:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_TIMECODE\n"));
ok = parse_timecode(dct, &parse->parse_io);
break;
case PARSEIOC_SETFMT:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_SETFMT\n"));
ok = parse_setfmt(dct, &parse->parse_io);
break;
case PARSEIOC_GETFMT:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_GETFMT\n"));
ok = parse_getfmt(dct, &parse->parse_io);
break;
case PARSEIOC_SETCS:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_SETCS\n"));
ok = parse_setcs(dct, &parse->parse_io);
break;
}
mp->b_datap->db_type = ok ? M_IOCACK : M_IOCNAK;
}
else
{
mp->b_datap->db_type = M_IOCNAK;
}
parseprintf(DD_WPUT,("parse: parsewput qreply - %s\n", (mp->b_datap->db_type == M_IOCNAK) ? "M_IOCNAK" : "M_IOCACK"));
qreply(q, mp);
break;
}
}
return 0;
}
/*
* read characters from streams buffers
*/
static unsigned long
rdchar(
register mblk_t **mp
)
{
while (*mp != (mblk_t *)NULL)
{
if ((*mp)->b_wptr - (*mp)->b_rptr)
{
return (unsigned long)(*(unsigned char *)((*mp)->b_rptr++));
}
else
{
register mblk_t *mmp = *mp;
*mp = (*mp)->b_cont;
freeb(mmp);
}
}
return (unsigned)~0;
}
/*
* convert incoming data
*/
static int
parserput(
queue_t *q,
mblk_t *mp
)
{
unsigned char type;
switch (type = mp->b_datap->db_type)
{
default:
/*
* anything we don't know will be put on queue
* the service routine will move it to the next one
*/
parseprintf(DD_RPUT,("parse: parserput - forward type 0x%x\n", type));
if (canput(q->q_next) || (mp->b_datap->db_type > QPCTL))
{
putnext(q, mp);
}
else
putq(q, mp);
break;
case M_BREAK:
case M_DATA:
{
register parsestream_t * parse = (parsestream_t *)(void *)q->q_ptr;
register mblk_t *nmp;
register unsigned long ch;
timestamp_t ctime;
/*
* get time on packet delivery
*/
uniqtime(&ctime.tv);
if (!(parse->parse_status & PARSE_ENABLE))
{
parseprintf(DD_RPUT,("parse: parserput - parser disabled - forward type 0x%x\n", type));
if (canput(q->q_next) || (mp->b_datap->db_type > QPCTL))
{
putnext(q, mp);
}
else
putq(q, mp);
}
else
{
parseprintf(DD_RPUT,("parse: parserput - M_%s\n", (type == M_DATA) ? "DATA" : "BREAK"));
if (type == M_DATA)
{
/*
* parse packet looking for start an end characters
*/
while (mp != (mblk_t *)NULL)
{
ch = rdchar(&mp);
if (ch != ~0 && parse_ioread(&parse->parse_io, (unsigned int)ch, &ctime))
{
/*
* up up and away (hopefully ...)
* don't press it if resources are tight or nobody wants it
*/
nmp = (mblk_t *)NULL;
if (canput(parse->parse_queue->q_next) && (nmp = allocb(sizeof(parsetime_t), BPRI_MED)))
{
bcopy((caddr_t)&parse->parse_io.parse_dtime, (caddr_t)nmp->b_rptr, sizeof(parsetime_t));
nmp->b_wptr += sizeof(parsetime_t);
putnext(parse->parse_queue, nmp);
}
else
if (nmp) freemsg(nmp);
parse_iodone(&parse->parse_io);
}
}
}
else
{
if (parse_ioread(&parse->parse_io, (unsigned int)0, &ctime))
{
/*
* up up and away (hopefully ...)
* don't press it if resources are tight or nobody wants it
*/
nmp = (mblk_t *)NULL;
if (canput(parse->parse_queue->q_next) && (nmp = allocb(sizeof(parsetime_t), BPRI_MED)))
{
bcopy((caddr_t)&parse->parse_io.parse_dtime, (caddr_t)nmp->b_rptr, sizeof(parsetime_t));
nmp->b_wptr += sizeof(parsetime_t);
putnext(parse->parse_queue, nmp);
}
else
if (nmp) freemsg(nmp);
parse_iodone(&parse->parse_io);
}
freemsg(mp);
}
break;
}
}
/*
* CD PPS support for non direct ISR hack
*/
case M_HANGUP:
case M_UNHANGUP:
{
register parsestream_t * parse = (parsestream_t *)(void *)q->q_ptr;
timestamp_t ctime;
register mblk_t *nmp;
register int status = cd_invert ^ (type == M_UNHANGUP);
uniqtime(&ctime.tv);
parseprintf(DD_RPUT,("parse: parserput - M_%sHANGUP\n", (type == M_HANGUP) ? "" : "UN"));
if ((parse->parse_status & PARSE_ENABLE) &&
parse_iopps(&parse->parse_io, (int)(status ? SYNC_ONE : SYNC_ZERO), &ctime))
{
nmp = (mblk_t *)NULL;
if (canput(parse->parse_queue->q_next) && (nmp = allocb(sizeof(parsetime_t), BPRI_MED)))
{
bcopy((caddr_t)&parse->parse_io.parse_dtime, (caddr_t)nmp->b_rptr, sizeof(parsetime_t));
nmp->b_wptr += sizeof(parsetime_t);
putnext(parse->parse_queue, nmp);
}
else
if (nmp) freemsg(nmp);
parse_iodone(&parse->parse_io);
freemsg(mp);
}
else
if (canput(q->q_next) || (mp->b_datap->db_type > QPCTL))
{
putnext(q, mp);
}
else
putq(q, mp);
if (status)
{
parse->parse_ppsclockev.tv = ctime.tv;
++(parse->parse_ppsclockev.serial);
}
}
}
return 0;
}
static int init_zs_linemon P((queue_t *, queue_t *)); /* handle line monitor for "zs" driver */
static void close_zs_linemon P((queue_t *, queue_t *));
/*-------------------- CD isr status monitor ---------------*/
static int
init_linemon(
register queue_t *q
)
{
register queue_t *dq;
dq = WR(q);
/*
* we ARE doing very bad things down here (basically stealing ISR
* hooks)
*
* so we chase down the STREAMS stack searching for the driver
* and if this is a known driver we insert our ISR routine for
* status changes in to the ExternalStatus handling hook
*/
while (dq->q_next)
{
dq = dq->q_next; /* skip down to driver */
}
/*
* find appropriate driver dependent routine
*/
if (dq->q_qinfo && dq->q_qinfo->qi_minfo)
{
register char *dname = dq->q_qinfo->qi_minfo->mi_idname;
parseprintf(DD_INSTALL, ("init_linemon: driver is \"%s\"\n", dname));
#ifdef sun
if (dname && !Strcmp(dname, "zs"))
{
return init_zs_linemon(dq, q);
}
else
#endif
{
parseprintf(DD_INSTALL, ("init_linemon: driver \"%s\" not suitable for CD monitoring\n", dname));
return 0;
}
}
parseprintf(DD_INSTALL, ("init_linemon: cannot find driver\n"));
return 0;
}
static void
close_linemon(
register queue_t *q,
register queue_t *my_q
)
{
/*
* find appropriate driver dependent routine
*/
if (q->q_qinfo && q->q_qinfo->qi_minfo)
{
register char *dname = q->q_qinfo->qi_minfo->mi_idname;
#ifdef sun
if (dname && !Strcmp(dname, "zs"))
{
close_zs_linemon(q, my_q);
return;
}
parseprintf(DD_INSTALL, ("close_linemon: cannot find driver close routine for \"%s\"\n", dname));
#endif
}
parseprintf(DD_INSTALL, ("close_linemon: cannot find driver name\n"));
}
#ifdef sun
#include <sundev/zsreg.h>
#include <sundev/zscom.h>
#include <sundev/zsvar.h>
static unsigned long cdmask = ZSRR0_CD;
struct savedzsops
{
struct zsops zsops;
struct zsops *oldzsops;
};
struct zsops *emergencyzs;
extern void zsopinit P((struct zscom *, struct zsops *));
static int zs_xsisr P((struct zscom *)); /* zs external status interupt handler */
static int
init_zs_linemon(
register queue_t *q,
register queue_t *my_q
)
{
register struct zscom *zs;
register struct savedzsops *szs;
register parsestream_t *parsestream = (parsestream_t *)(void *)my_q->q_ptr;
/*
* we expect the zsaline pointer in the q_data pointer
* from there on we insert our on EXTERNAL/STATUS ISR routine
* into the interrupt path, before the standard handler
*/
zs = ((struct zsaline *)(void *)q->q_ptr)->za_common;
if (!zs)
{
/*
* well - not found on startup - just say no (shouldn't happen though)
*/
return 0;
}
else
{
unsigned long s;
/*
* we do a direct replacement, in case others fiddle also
* if somebody else grabs our hook and we disconnect
* we are in DEEP trouble - panic is likely to be next, sorry
*/
szs = (struct savedzsops *)(void *)kmem_alloc(sizeof(struct savedzsops));
if (szs == (struct savedzsops *)0)
{
parseprintf(DD_INSTALL, ("init_zs_linemon: CD monitor NOT installed - no memory\n"));
return 0;
}
else
{
parsestream->parse_data = (void *)szs;
s = splhigh();
parsestream->parse_dqueue = q; /* remember driver */
szs->zsops = *zs->zs_ops;
szs->zsops.zsop_xsint = zs_xsisr; /* place our bastard */
szs->oldzsops = zs->zs_ops;
emergencyzs = zs->zs_ops;
zsopinit(zs, &szs->zsops); /* hook it up */
(void) splx(s);
parseprintf(DD_INSTALL, ("init_zs_linemon: CD monitor installed\n"));
return 1;
}
}
}
/*
* unregister our ISR routine - must call under splhigh()
*/
static void
close_zs_linemon(
register queue_t *q,
register queue_t *my_q
)
{
register struct zscom *zs;
register parsestream_t *parsestream = (parsestream_t *)(void *)my_q->q_ptr;
zs = ((struct zsaline *)(void *)q->q_ptr)->za_common;
if (!zs)
{
/*
* well - not found on startup - just say no (shouldn't happen though)
*/
return;
}
else
{
register struct savedzsops *szs = (struct savedzsops *)parsestream->parse_data;
zsopinit(zs, szs->oldzsops); /* reset to previous handler functions */
kmem_free((caddr_t)szs, sizeof (struct savedzsops));
parseprintf(DD_INSTALL, ("close_zs_linemon: CD monitor deleted\n"));
return;
}
}
#define MAXDEPTH 50 /* maximum allowed stream crawl */
#ifdef PPS_SYNC
extern void hardpps P((struct timeval *, long));
#ifdef PPS_NEW
extern struct timeval timestamp;
#else
extern struct timeval pps_time;
#endif
#endif
/*
* take external status interrupt (only CD interests us)
*/
static int
zs_xsisr(
struct zscom *zs
)
{
register struct zsaline *za = (struct zsaline *)(void *)zs->zs_priv;
register struct zscc_device *zsaddr = zs->zs_addr;
register queue_t *q;
register unsigned char zsstatus;
register int loopcheck;
register char *dname;
#ifdef PPS_SYNC
register unsigned int s;
register long usec;
#endif
/*
* pick up current state
*/
zsstatus = zsaddr->zscc_control;
if ((za->za_rr0 ^ zsstatus) & (cdmask))
{
timestamp_t cdevent;
register int status;
za->za_rr0 = (za->za_rr0 & ~(cdmask)) | (zsstatus & (cdmask));
#ifdef PPS_SYNC
s = splclock();
#ifdef PPS_NEW
usec = timestamp.tv_usec;
#else
usec = pps_time.tv_usec;
#endif
#endif
/*
* time stamp
*/
uniqtime(&cdevent.tv);
#ifdef PPS_SYNC
(void)splx(s);
#endif
/*
* logical state
*/
status = cd_invert ? (zsstatus & cdmask) == 0 : (zsstatus & cdmask) != 0;
#ifdef PPS_SYNC
if (status)
{
usec = cdevent.tv.tv_usec - usec;
if (usec < 0)
usec += 1000000;
hardpps(&cdevent.tv, usec);
}
#endif
q = za->za_ttycommon.t_readq;
/*
* ok - now the hard part - find ourself
*/
loopcheck = MAXDEPTH;
while (q)
{
if (q->q_qinfo && q->q_qinfo->qi_minfo)
{
dname = q->q_qinfo->qi_minfo->mi_idname;
if (!Strcmp(dname, parseinfo.st_rdinit->qi_minfo->mi_idname))
{
/*
* back home - phew (hopping along stream queues might
* prove dangerous to your health)
*/
if ((((parsestream_t *)(void *)q->q_ptr)->parse_status & PARSE_ENABLE) &&
parse_iopps(&((parsestream_t *)(void *)q->q_ptr)->parse_io, (int)(status ? SYNC_ONE : SYNC_ZERO), &cdevent))
{
/*
* XXX - currently we do not pass up the message, as
* we should.
* for a correct behaviour wee need to block out
* processing until parse_iodone has been posted via
* a softcall-ed routine which does the message pass-up
* right now PPS information relies on input being
* received
*/
parse_iodone(&((parsestream_t *)(void *)q->q_ptr)->parse_io);
}
if (status)
{
((parsestream_t *)(void *)q->q_ptr)->parse_ppsclockev.tv = cdevent.tv;
++(((parsestream_t *)(void *)q->q_ptr)->parse_ppsclockev.serial);
}
parseprintf(DD_ISR, ("zs_xsisr: CD event %s has been posted for \"%s\"\n", status ? "ONE" : "ZERO", dname));
break;
}
}
q = q->q_next;
if (!loopcheck--)
{
panic("zs_xsisr: STREAMS Queue corrupted - CD event");
}
}
/*
* only pretend that CD has been handled
*/
ZSDELAY(2);
if (!((za->za_rr0 ^ zsstatus) & ~(cdmask)))
{
/*
* all done - kill status indication and return
*/
zsaddr->zscc_control = ZSWR0_RESET_STATUS; /* might kill other conditions here */
return 0;
}
}
if (zsstatus & cdmask) /* fake CARRIER status */
za->za_flags |= ZAS_CARR_ON;
else
za->za_flags &= ~ZAS_CARR_ON;
/*
* we are now gathered here to process some unusual external status
* interrupts.
* any CD events have also been handled and shouldn't be processed
* by the original routine (unless we have a VERY busy port pin)
* some initializations are done here, which could have been done before for
* both code paths but have been avoided for minimum path length to
* the uniq_time routine
*/
dname = (char *) 0;
q = za->za_ttycommon.t_readq;
loopcheck = MAXDEPTH;
/*
* the real thing for everything else ...
*/
while (q)
{
if (q->q_qinfo && q->q_qinfo->qi_minfo)
{
dname = q->q_qinfo->qi_minfo->mi_idname;
if (!Strcmp(dname, parseinfo.st_rdinit->qi_minfo->mi_idname))
{
register int (*zsisr) P((struct zscom *));
/*
* back home - phew (hopping along stream queues might
* prove dangerous to your health)
*/
if ((zsisr = ((struct savedzsops *)((parsestream_t *)(void *)q->q_ptr)->parse_data)->oldzsops->zsop_xsint))
return zsisr(zs);
else
panic("zs_xsisr: unable to locate original ISR");
parseprintf(DD_ISR, ("zs_xsisr: non CD event was processed for \"%s\"\n", dname));
/*
* now back to our program ...
*/
return 0;
}
}
q = q->q_next;
if (!loopcheck--)
{
panic("zs_xsisr: STREAMS Queue corrupted - non CD event");
}
}
/*
* last resort - shouldn't even come here as it indicates
* corrupted TTY structures
*/
printf("zs_zsisr: looking for \"%s\" - found \"%s\" - taking EMERGENCY path\n", parseinfo.st_rdinit->qi_minfo->mi_idname, dname ? dname : "-NIL-");
if (emergencyzs && emergencyzs->zsop_xsint)
emergencyzs->zsop_xsint(zs);
else
panic("zs_xsisr: no emergency ISR handler");
return 0;
}
#endif /* sun */
/*
* History:
*
* parsestreams.c,v
* Revision 4.7 1999/11/28 09:13:53 kardel
* RECON_4_0_98F
*
* Revision 4.6 1998/12/20 23:45:31 kardel
* fix types and warnings
*
* Revision 4.5 1998/11/15 21:23:38 kardel
* ntp_memset() replicated in Sun kernel files
*
* Revision 4.4 1998/06/13 12:15:59 kardel
* superfluous variable removed
*
* Revision 4.3 1998/06/12 15:23:08 kardel
* fix prototypes
* adjust for ansi2knr
*
* Revision 4.2 1998/05/24 18:16:22 kardel
* moved copy of shadow status to the beginning
*
* Revision 4.1 1998/05/24 09:38:47 kardel
* streams initiated iopps calls (M_xHANGUP) are now consistent with the
* respective calls from zs_xsisr()
* simulation of CARRIER status to avoid unecessary M_xHANGUP messages
*
* Revision 4.0 1998/04/10 19:45:38 kardel
* Start 4.0 release version numbering
*
* from V3 3.37 log info deleted 1998/04/11 kardel
*/
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