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freebsd-nq/usr.sbin/xntpd/parse/parsesolaris.c
Garrett Wollman b9eb1bdbc4 xntpd version 3.3z from UDel
1994-02-03 22:09:07 +00:00

1210 lines
29 KiB
C
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/*
* /src/NTP/REPOSITORY/v3/parse/parsesolaris.c,v 3.9 1994/01/25 19:05:26 kardel Exp
*
* parsesolaris.c,v 3.9 1994/01/25 19:05:26 kardel Exp
*
* STREAMS module for reference clocks
* (SunOS5.x - not fully tested - buyer beware ! - OS KILLERS may still be
* lurking in the code!)
*
* Copyright (c) 1993,1994
* derived work from parsestreams.c ((c) 1991-1993, Frank Kardel) and
* dcf77sync.c((c) Frank Kardel)
* Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg
*
* 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.
*
*/
#ifndef lint
static char rcsid[] = "parsesolaris.c,v 3.9 1994/01/25 19:05:26 kardel Exp";
#endif
/*
* Well, the man spec says we have to do this junk - the
* header files tell a different story (i like that one more)
*/
#define SAFE_WR(q) (((q)->q_flag & QREADR) ? WR((q)) : (q))
#define SAFE_RD(q) (((q)->q_flag & QREADR) ? (q) : RD((q)))
/*
* needed to cope with Solaris 2.3 header file chaos
*/
#include <sys/types.h>
/*
* the Solaris 2.2 include list
*/
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/termios.h>
#include <sys/stream.h>
#include <sys/strtty.h>
#include <sys/stropts.h>
#include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/cpu.h>
#define STREAM /* that's what we are here for */
#define HAVE_NO_NICE /* for the NTP headerfiles */
#include "ntp_fp.h"
#include "parse.h"
#include "sys/parsestreams.h"
static unsigned int parsebusy = 0;
/*--------------- loadable driver section -----------------------------*/
static struct streamtab parseinfo;
static struct fmodsw fmod_templ =
{
"parse", /* module name */
&parseinfo, /* module information */
0, /* not clean yet */
/* lock ptr */
};
extern struct mod_ops mod_strmodops;
static struct modlstrmod modlstrmod =
{
&mod_strmodops, /* a STREAMS module */
"PARSE - NTP reference", /* name this baby - keep room for revision number */
&fmod_templ
};
static struct modlinkage modlinkage =
{
MODREV_1,
&modlstrmod,
NULL
};
/*
* strings support usually not in kernel
*/
static int Strlen(s)
register char *s;
{
register int c;
c = 0;
if (s)
{
while (*s++)
{
c++;
}
}
return c;
}
static void Strncpy(t, s, c)
register char *t;
register char *s;
register int c;
{
if (s && t)
{
while ((c-- > 0) && (*t++ = *s++))
;
}
}
int Strcmp(s, t)
register char *s;
register char *t;
{
register int c = 0;
if (!s || !t || (s == t))
{
return 0;
}
while (!(c = *s++ - *t++) && *s && *t)
/* empty loop */;
return c;
}
/*
* module management routines
*/
/*ARGSUSED*/
int _init(void)
{
static char revision[] = "3.9";
char *s, *S, *t;
/*
* 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 = modlstrmod.strmod_linkinfo;
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 (mod_install(&modlinkage));
}
/*ARGSUSED*/
int _info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/*ARGSUSED*/
int _fini(void)
{
if (parsebusy > 0)
{
printf("_fini[%s]: STREAMS module has still %d instances active.\n", modlstrmod.strmod_linkinfo, parsebusy);
return (EBUSY);
}
else
return (mod_remove(&modlinkage));
}
/*--------------- stream module definition ----------------------------*/
static int parseopen(), parseclose(), parsewput(), parserput(), parsersvc();
static struct module_info driverinfo =
{
0, /* module ID number */
fmod_templ.f_name, /* module name - why repeated here ? compat ?*/
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 */
};
static struct streamtab parseinfo = /* stream info element for parse driver */
{
&rinit, /* read queue */
&winit, /* write queue */
NULL, /* read mux */
NULL /* write mux */
};
/*--------------- 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();
/*--------------- module implementation -----------------------------*/
#define TIMEVAL_USADD(_X_, _US_) do {\
(_X_)->tv_usec += (_US_);\
if ((_X_)->tv_usec >= 1000000)\
{\
(_X_)->tv_sec++;\
(_X_)->tv_usec -= 1000000;\
}\
} while (0)
#if defined(sun4c) && defined(DEBUG_CD)
#include <sun4c/cpu.h>
#include <sun4c/auxio.h>
#define SET_LED(_X_) (((cpu & CPU_ARCH) == SUN4C_ARCH) ? *(u_char *)AUXIO_REG = AUX_MBO|AUX_EJECT|((_X_)?AUX_LED:0) : 0)
#else
#define SET_LED(_X_)
#endif
static int init_linemon();
static void close_linemon();
/*
* keep here MACHINE AND OS AND ENVIRONMENT DEPENDENT
* timing constants
*
* FOR ABSOLUTE PRECISION YOU NEED TO MEASURE THE TIMING
* SKEW BETWEEN THE HW-PPS SIGNAL AND KERNEL uniqtime()
* YOURSELF.
*
* YOU MUST BE QUALIFIED APPROPRIATELY FOR THESE TYPE
* OF HW MANIPULATION !
*
* you need an oscilloscope and the permission for HW work
* in order to figure out these timing constants/variables
*/
static unsigned long xsdelay = 10; /* assume an SS2 */
static unsigned long stdelay = 350;
struct delays
{
unsigned char mask; /* what to check for */
unsigned char type; /* what to match */
unsigned long xsdelay; /* external status direct delay in us */
unsigned long stdelay; /* STREAMS message delay (M_[UN]HANGUP) */
} isr_delays[] =
{
/*
* WARNING: must still be measured - currently taken from Craig Leres ppsdev
*/
#ifdef sun4c
{CPU_ARCH|CPU_MACH, CPU_SUN4C_50, 10, 350},
{CPU_ARCH|CPU_MACH, CPU_SUN4C_65, 15, 700},
{CPU_ARCH|CPU_MACH, CPU_SUN4C_75, 10, 350},
#endif
#ifdef sun4m
{CPU_ARCH|CPU_MACH, CPU_SUN4M_50, 8, 250},
{CPU_ARCH|CPU_MACH, CPU_SUN4M_690, 8, 250},
#endif
{0,}
};
void setup_delays()
{
register int i;
if (cputype & OBP_ARCH)
{
printf("parse: WARNING: PPS kernel fudge factors no yet determinable (no dev tree walk yet) - assuming SS2 (Sun4/75)\n", cputype);
return;
}
for (i = 0; isr_delays[i].mask; i++)
{
if ((cputype & isr_delays[i].mask) == isr_delays[i].type)
{
xsdelay = isr_delays[i].xsdelay;
stdelay = isr_delays[i].stdelay;
return;
}
}
printf("parse: WARNING: PPS kernel fudge factors unknown for this machine (Type 0x%x) - assuming SS2 (Sun4/75)\n", cputype);
}
#define M_PARSE 0x0001
#define M_NOPARSE 0x0002
static int
setup_stream(queue_t *q, int mode)
{
register mblk_t *mp;
parseprintf(DD_OPEN,("parse: SETUP_STREAM - setting up stream for q=%x\n", q));
mp = allocb(sizeof(struct stroptions), BPRI_MED);
if (mp)
{
struct stroptions *str = (struct stroptions *)mp->b_wptr;
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);
if (!q)
panic("NULL q - strange");
putnext(q, mp);
return putctl1(SAFE_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, cred_t *credp)
{
register mblk_t *mp;
register parsestream_t *parse;
static int notice = 0;
parseprintf(DD_OPEN,("parse: OPEN - q=%x\n", q));
if (sflag != MODOPEN)
{ /* open only for modules */
parseprintf(DD_OPEN,("parse: OPEN - FAILED - not MODOPEN\n"));
return EIO;
}
if (q->q_ptr != (caddr_t)NULL)
{
parseprintf(DD_OPEN,("parse: OPEN - FAILED - EXCLUSIVE ONLY\n"));
return EBUSY;
}
parsebusy++;
q->q_ptr = (caddr_t)kmem_alloc(sizeof(parsestream_t), KM_SLEEP);
parseprintf(DD_OPEN,("parse: OPEN - parse area q=%x, q->q_ptr=%x\n", q, q->q_ptr));
SAFE_WR(q)->q_ptr = q->q_ptr;
parseprintf(DD_OPEN,("parse: OPEN - WQ parse area q=%x, q->q_ptr=%x\n", SAFE_WR(q), SAFE_WR(q)->q_ptr));
parse = (parsestream_t *) 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;
parseprintf(DD_OPEN,("parse: OPEN - initializing io subsystem q=%x\n", q));
if (!parse_ioinit(&parse->parse_io))
{
/*
* ok guys - beat it
*/
kmem_free((caddr_t)parse, sizeof(parsestream_t));
parsebusy--;
return EIO;
}
parseprintf(DD_OPEN,("parse: OPEN - initializing stream q=%x\n", q));
if (setup_stream(q, M_PARSE))
{
(void) init_linemon(q); /* hook up PPS ISR routines if possible */
setup_delays();
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)
{
printf("%s: Copyright (c) 1991-1993, Frank Kardel\n", modlstrmod.strmod_linkinfo);
notice = 1;
}
return 0;
}
else
{
parsebusy--;
return EIO;
}
}
/*ARGSUSED*/
static int parseclose(queue_t *q, int flags)
{
register parsestream_t *parse = (parsestream_t *)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;
SAFE_WR(q)->q_ptr = (caddr_t)NULL;
parsebusy--;
}
/*
* move unrecognized stuff upward
*/
static 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;
}
}
}
/*
* do ioctls and
* send stuff down - dont care about
* flow control
*/
static int parsewput(queue_t *q, mblk_t *mp)
{
register int ok = 1;
register mblk_t *datap;
register struct iocblk *iocp;
parsestream_t *parse = (parsestream_t *)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 *)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 *)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 & ~PARSE_ENABLE) |
(iocp->ioc_cmd == PARSEIOC_ENABLE) ?
PARSE_ENABLE : 0;
if (!setup_stream(SAFE_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_SETSTAT:
case PARSEIOC_GETSTAT:
case PARSEIOC_TIMECODE:
case PARSEIOC_SETFMT:
case PARSEIOC_GETFMT:
case PARSEIOC_SETCS:
if (iocp->ioc_count == sizeof(parsectl_t))
{
parsectl_t *dct = (parsectl_t *)mp->b_cont->b_rptr;
switch (iocp->ioc_cmd)
{
case PARSEIOC_GETSTAT:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_GETSTAT\n"));
ok = parse_getstat(dct, &parse->parse_io);
break;
case PARSEIOC_SETSTAT:
parseprintf(DD_WPUT,("parse: parsewput - PARSEIOC_SETSTAT\n"));
ok = parse_setstat(dct, &parse->parse_io);
break;
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;
}
}
}
/*
* read characters from streams buffers
*/
static unsigned long rdchar(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 ~0;
}
/*
* convert incoming data
*/
static int parserput(queue_t *q, mblk_t *imp)
{
register unsigned char type;
mblk_t *mp = imp;
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 *)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
{
#if 0
parseprintf(DD_RPUT,("parse: parserput - M_%s\n", (type == M_DATA) ? "DATA" : "BREAK"));
#endif
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, (char)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, (char)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 *)q->q_ptr;
timestamp_t ctime;
register mblk_t *nmp;
register int status = cd_invert ^ (type == M_HANGUP);
SET_LED(status);
uniqtime(&ctime.tv);
TIMEVAL_USADD(&ctime.tv, stdelay);
parseprintf(DD_RPUT,("parse: parserput - M_%sHANGUP\n", (type == M_HANGUP) ? "" : "UN"));
if ((parse->parse_status & PARSE_ENABLE) &&
parse_iopps(&parse->parse_io, 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);
}
}
}
}
static int init_zs_linemon(); /* handle line monitor for "zs" driver */
static void close_zs_linemon();
static void zs_xsisr(); /* zs external status interupt handler */
/*-------------------- CD isr status monitor ---------------*/
static int init_linemon(queue_t *q)
{
register queue_t *dq;
dq = SAFE_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(queue_t *q, 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 <sys/tty.h>
#include <sys/zsdev.h>
#include <sys/ser_async.h>
#include <sys/ser_zscc.h>
/*
* there should be some docs telling how to get to
* sz:zs_usec_delay and zs:initzsops()
*/
#define zs_usec_delay 5
struct savedzsops
{
struct zsops zsops;
struct zsops *oldzsops;
};
static struct zsops *emergencyzs;
static int init_zs_linemon(queue_t *q, queue_t *my_q)
{
register struct zscom *zs;
register struct savedzsops *szs;
register parsestream_t *parsestream = (parsestream_t *)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 asyncline *)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 *) kmem_alloc(sizeof(struct savedzsops), KM_SLEEP);
parsestream->parse_data = (void *)szs;
mutex_enter(zs->zs_excl);
parsestream->parse_dqueue = q; /* remember driver */
szs->zsops = *zs->zs_ops;
szs->zsops.zsop_xsint = (void (*)())zs_xsisr; /* place our bastard */
szs->oldzsops = zs->zs_ops;
emergencyzs = zs->zs_ops;
zs->zs_ops = &szs->zsops; /* hook it up */
/*
* XXX: this is usually done via zsopinit()
* - have yet to find a way to call that routine
*/
zs->zs_xsint = (void (*)())zs_xsisr;
mutex_exit(zs->zs_excl);
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(queue_t *q, queue_t *my_q)
{
register struct zscom *zs;
register parsestream_t *parsestream = (parsestream_t *)my_q->q_ptr;
zs = ((struct asyncline *)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;
mutex_enter(zs->zs_excl);
zs->zs_ops = szs->oldzsops; /* reset to previous handler functions */
/*
* XXX: revert xsint (usually done via zsopinit() - have still to find
* a way to call that bugger
*/
zs->zs_xsint = zs->zs_ops->zsop_xsint;
mutex_exit(zs->zs_excl);
kmem_free((caddr_t)szs, sizeof (struct savedzsops));
parseprintf(DD_INSTALL, ("close_zs_linemon: CD monitor deleted\n"));
return;
}
}
#define ZSRR0_IGNORE (ZSRR0_CD|ZSRR0_SYNC|ZSRR0_CTS)
#define MAXDEPTH 50 /* maximum allowed stream crawl */
/*
* take external status interrupt (only CD interests us)
*/
static void zs_xsisr(struct zscom *zs)
{
register struct asyncline *za = (struct asyncline *)zs->zs_priv;
register queue_t *q;
register unsigned char zsstatus;
register int loopcheck;
register unsigned char cdstate;
register char *dname;
/*
* pick up current state
*/
zsstatus = SCC_READ0();
if (za->za_rr0 ^ (cdstate = zsstatus & ZSRR0_CD))
{
timestamp_t cdevent;
register int status;
/*
* CONDITIONAL external measurement support
*/
SET_LED(cdstate); /*
* inconsistent with upper SET_LED, but this
* is for oscilloscope business anyway and we
* are just interested in edge delays in the
* lower us range
*/
/*
* time stamp
*/
uniqtime(&cdevent.tv);
TIMEVAL_USADD(&cdevent.tv, xsdelay);
q = za->za_ttycommon.t_readq;
/*
* logical state
*/
status = cd_invert ? cdstate == 0 : cdstate != 0;
/*
* 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 *)q->q_ptr)->parse_status & PARSE_ENABLE) &&
parse_iopps(&((parsestream_t *)q->q_ptr)->parse_io, 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 *)q->q_ptr)->parse_io);
}
if (status)
{
((parsestream_t *)q->q_ptr)->parse_ppsclockev.tv = cdevent.tv;
++(((parsestream_t *)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 and ignored transistion (SYNC,CTS)
* have been handled
*/
za->za_rr0 = (za->za_rr0 & ~ZSRR0_IGNORE) | (zsstatus & ZSRR0_IGNORE);
if (((za->za_rr0 ^ zsstatus) & ~ZSRR0_IGNORE) == 0)
{
/*
* all done - kill status indication and return
*/
SCC_WRITE0(ZSWR0_RESET_STATUS); /* might kill other conditions here */
return;
}
}
parseprintf(DD_ISR, ("zs_xsisr: non CD event 0x%x for \"%s\"\n",
(za->za_rr0 ^ zsstatus) & ~ZSRR0_CD,dname));
/*
* 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 avioded 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 void (*zsisr)();
/*
* back home - phew (hopping along stream queues might
* prove dangerous to your health)
*/
if (zsisr = ((struct savedzsops *)((parsestream_t *)q->q_ptr)->parse_data)->oldzsops->zsop_xsint)
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;
}
}
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");
}
#endif /* sun */
/*
* History:
*
* parsesolaris.c,v
* Revision 3.9 1994/01/25 19:05:26 kardel
* 94/01/23 reconcilation
*
* Revision 3.8 1994/01/23 17:22:04 kardel
* 1994 reconcilation
*
* Revision 3.7 1993/12/15 18:24:41 kardel
* Now also ignoring state changes on ZSRR0_{SYNC,CTS} to avoid zs driver bugs (Solaris 2.3)
*
* Revision 3.6 1993/12/15 12:48:53 kardel
* fixed message loss on M_*HANHUP messages
*
* Revision 3.5 1993/12/14 21:05:12 kardel
* PPS working now for SunOS 5.x zs external status hook
*
* Revision 3.4 1993/11/13 11:13:17 kardel
* Solaris 2.3 additional includes
*
* Revision 3.3 1993/11/11 11:20:33 kardel
* declaration fixes
*
* Revision 3.2 1993/11/05 15:40:25 kardel
* shut up nice feature detection
*
* Revision 3.1 1993/11/01 20:00:29 kardel
* parse Solaris support (initial version)
*
*/
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