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4.3BSD release version
[unix-history] / usr / src / sys / vax / uba / dh.c
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)dh.c 7.1 (Berkeley) %G%
*/
#include "dh.h"
#if NDH > 0
/*
* DH-11/DM-11 driver
*/
#include "../machine/pte.h"
#include "bk.h"
#include "uba.h"
#include "param.h"
#include "conf.h"
#include "dir.h"
#include "user.h"
#include "proc.h"
#include "ioctl.h"
#include "tty.h"
#include "map.h"
#include "buf.h"
#include "vm.h"
#include "kernel.h"
#include "syslog.h"
#include "ubareg.h"
#include "ubavar.h"
#include "dhreg.h"
#include "dmreg.h"
#include "bkmac.h"
#include "clist.h"
#include "file.h"
#include "uio.h"
/*
* Definition of the driver for the auto-configuration program.
* There is one definition for the dh and one for the dm.
*/
int dhprobe(), dhattach(), dhrint(), dhxint(), dhtimer();
struct uba_device *dhinfo[NDH];
u_short dhstd[] = { 0 };
struct uba_driver dhdriver =
{ dhprobe, 0, dhattach, 0, dhstd, "dh", dhinfo };
int dmprobe(), dmattach(), dmintr();
struct uba_device *dminfo[NDH];
u_short dmstd[] = { 0 };
struct uba_driver dmdriver =
{ dmprobe, 0, dmattach, 0, dmstd, "dm", dminfo };
#ifndef PORTSELECTOR
#define ISPEED B9600
#define IFLAGS (EVENP|ODDP|ECHO)
#else
#define ISPEED B4800
#define IFLAGS (EVENP|ODDP)
#endif
#define FASTTIMER (hz/30) /* scan rate with silos on */
/*
* Local variables for the driver
*/
short dhsar[NDH]; /* software copy of last bar */
short dhsoftCAR[NDH];
struct tty dh11[NDH*16];
int ndh11 = NDH*16;
int dhact; /* mask of active dh's */
int dhsilos; /* mask of dh's with silo in use */
int dhchars[NDH]; /* recent input count */
int dhrate[NDH]; /* smoothed input count */
int dhhighrate = 100; /* silo on if dhchars > dhhighrate */
int dhlowrate = 75; /* silo off if dhrate < dhlowrate */
static short timerstarted;
int dhstart(), ttrstrt();
/*
* The clist space is mapped by the driver onto each UNIBUS.
* The UBACVT macro converts a clist space address for unibus uban
* into an i/o space address for the DMA routine.
*/
int dh_ubinfo[NUBA]; /* info about allocated unibus map */
int cbase[NUBA]; /* base address in unibus map */
#define UBACVT(x, uban) (cbase[uban] + ((x)-(char *)cfree))
/*
* Routine for configuration to force a dh to interrupt.
* Set to transmit at 9600 baud, and cause a transmitter interrupt.
*/
/*ARGSUSED*/
dhprobe(reg)
caddr_t reg;
{
register int br, cvec; /* these are ``value-result'' */
register struct dhdevice *dhaddr = (struct dhdevice *)reg;
#ifdef lint
br = 0; cvec = br; br = cvec;
if (ndh11 == 0) ndh11 = 1;
dhrint(0); dhxint(0);
#endif
#ifndef notdef
dhaddr->un.dhcsr = DH_RIE|DH_MM|DH_RI;
DELAY(1000);
dhaddr->un.dhcsr &= ~DH_RI;
dhaddr->un.dhcsr = 0;
#else
dhaddr->un.dhcsr = DH_TIE;
DELAY(5);
dhaddr->dhlpr = (B9600 << 10) | (B9600 << 6) | BITS7|PENABLE;
dhaddr->dhbcr = -1;
dhaddr->dhcar = 0;
dhaddr->dhbar = 1;
DELAY(100000); /* wait 1/10'th of a sec for interrupt */
dhaddr->un.dhcsr = 0;
if (cvec && cvec != 0x200)
cvec -= 4; /* transmit -> receive */
#endif
return (sizeof (struct dhdevice));
}
/*
* Routine called to attach a dh.
*/
dhattach(ui)
struct uba_device *ui;
{
dhsoftCAR[ui->ui_unit] = ui->ui_flags;
cbase[ui->ui_ubanum] = -1;
}
/*
* Configuration routine to cause a dm to interrupt.
*/
dmprobe(reg)
caddr_t reg;
{
register int br, vec; /* value-result */
register struct dmdevice *dmaddr = (struct dmdevice *)reg;
#ifdef lint
br = 0; vec = br; br = vec;
dmintr(0);
#endif
dmaddr->dmcsr = DM_DONE|DM_IE;
DELAY(20);
dmaddr->dmcsr = 0;
return (1);
}
/*ARGSUSED*/
dmattach(ui)
struct uba_device *ui;
{
/* no local state to set up */
}
/*
* Open a DH11 line, mapping the clist onto the uba if this
* is the first dh on this uba. Turn on this dh if this is
* the first use of it. Also do a dmopen to wait for carrier.
*/
/*ARGSUSED*/
dhopen(dev, flag)
dev_t dev;
{
register struct tty *tp;
register int unit, dh;
register struct dhdevice *addr;
register struct uba_device *ui;
int s;
unit = minor(dev);
dh = unit >> 4;
if (unit >= NDH*16 || (ui = dhinfo[dh])== 0 || ui->ui_alive == 0)
return (ENXIO);
tp = &dh11[unit];
if (tp->t_state&TS_XCLUDE && u.u_uid!=0)
return (EBUSY);
addr = (struct dhdevice *)ui->ui_addr;
tp->t_addr = (caddr_t)addr;
tp->t_oproc = dhstart;
tp->t_state |= TS_WOPEN;
/*
* While setting up state for this uba and this dh,
* block uba resets which can clear the state.
*/
s = spl5();
if (cbase[ui->ui_ubanum] == -1) {
dh_ubinfo[ui->ui_ubanum] =
uballoc(ui->ui_ubanum, (caddr_t)cfree,
nclist*sizeof(struct cblock), 0);
cbase[ui->ui_ubanum] = UBAI_ADDR(dh_ubinfo[ui->ui_ubanum]);
}
if (timerstarted == 0) {
timerstarted++;
timeout(dhtimer, (caddr_t) 0, hz);
}
if ((dhact&(1<<dh)) == 0) {
addr->un.dhcsr |= DH_IE;
dhact |= (1<<dh);
addr->dhsilo = 0;
}
splx(s);
/*
* If this is first open, initialize tty state to default.
*/
if ((tp->t_state&TS_ISOPEN) == 0) {
ttychars(tp);
#ifndef PORTSELECTOR
if (tp->t_ispeed == 0) {
#else
tp->t_state |= TS_HUPCLS;
#endif PORTSELECTOR
tp->t_ispeed = ISPEED;
tp->t_ospeed = ISPEED;
tp->t_flags = IFLAGS;
#ifndef PORTSELECTOR
}
#endif PORTSELECTOR
dhparam(unit);
}
/*
* Wait for carrier, then process line discipline specific open.
*/
dmopen(dev);
return ((*linesw[tp->t_line].l_open)(dev, tp));
}
/*
* Close a DH11 line, turning off the DM11.
*/
/*ARGSUSED*/
dhclose(dev, flag)
dev_t dev;
int flag;
{
register struct tty *tp;
register unit;
unit = minor(dev);
tp = &dh11[unit];
(*linesw[tp->t_line].l_close)(tp);
((struct dhdevice *)(tp->t_addr))->dhbreak &= ~(1<<(unit&017));
if (tp->t_state&TS_HUPCLS || (tp->t_state&TS_ISOPEN)==0)
dmctl(unit, DML_OFF, DMSET);
ttyclose(tp);
}
dhread(dev, uio)
dev_t dev;
struct uio *uio;
{
register struct tty *tp = &dh11[minor(dev)];
return ((*linesw[tp->t_line].l_read)(tp, uio));
}
dhwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
register struct tty *tp = &dh11[minor(dev)];
return ((*linesw[tp->t_line].l_write)(tp, uio));
}
/*
* DH11 receiver interrupt.
*/
dhrint(dh)
int dh;
{
register struct tty *tp;
register c;
register struct dhdevice *addr;
register struct tty *tp0;
register struct uba_device *ui;
int overrun = 0;
ui = dhinfo[dh];
if (ui == 0 || ui->ui_alive == 0)
return;
addr = (struct dhdevice *)ui->ui_addr;
tp0 = &dh11[dh<<4];
/*
* Loop fetching characters from the silo for this
* dh until there are no more in the silo.
*/
while ((c = addr->dhrcr) < 0) {
tp = tp0 + ((c>>8)&0xf);
dhchars[dh]++;
if ((tp->t_state&TS_ISOPEN)==0) {
wakeup((caddr_t)&tp->t_rawq);
#ifdef PORTSELECTOR
if ((tp->t_state&TS_WOPEN) == 0)
#endif
continue;
}
if (c & DH_PE)
if ((tp->t_flags&(EVENP|ODDP))==EVENP
|| (tp->t_flags&(EVENP|ODDP))==ODDP )
continue;
if ((c & DH_DO) && overrun == 0) {
log(LOG_WARNING, "dh%d: silo overflow\n", dh);
overrun = 1;
}
if (c & DH_FE)
/*
* At framing error (break) generate
* a null (in raw mode, for getty), or a
* interrupt (in cooked/cbreak mode).
*/
if (tp->t_flags&RAW)
c = 0;
else
c = tp->t_intrc;
#if NBK > 0
if (tp->t_line == NETLDISC) {
c &= 0177;
BKINPUT(c, tp);
} else
#endif
(*linesw[tp->t_line].l_rint)(c, tp);
}
}
/*
* Ioctl for DH11.
*/
/*ARGSUSED*/
dhioctl(dev, cmd, data, flag)
caddr_t data;
{
register struct tty *tp;
register int unit = minor(dev);
int error;
tp = &dh11[unit];
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag);
if (error >= 0)
return (error);
error = ttioctl(tp, cmd, data, flag);
if (error >= 0) {
if (cmd == TIOCSETP || cmd == TIOCSETN || cmd == TIOCLBIS ||
cmd == TIOCLBIC || cmd == TIOCLSET)
dhparam(unit);
return (error);
}
switch (cmd) {
case TIOCSBRK:
((struct dhdevice *)(tp->t_addr))->dhbreak |= 1<<(unit&017);
break;
case TIOCCBRK:
((struct dhdevice *)(tp->t_addr))->dhbreak &= ~(1<<(unit&017));
break;
case TIOCSDTR:
dmctl(unit, DML_DTR|DML_RTS, DMBIS);
break;
case TIOCCDTR:
dmctl(unit, DML_DTR|DML_RTS, DMBIC);
break;
default:
return (ENOTTY);
}
return (0);
}
/*
* Set parameters from open or stty into the DH hardware
* registers.
*/
dhparam(unit)
register int unit;
{
register struct tty *tp;
register struct dhdevice *addr;
register int lpar;
int s;
tp = &dh11[unit];
addr = (struct dhdevice *)tp->t_addr;
/*
* Block interrupts so parameters will be set
* before the line interrupts.
*/
s = spl5();
addr->un.dhcsrl = (unit&0xf) | DH_IE;
if ((tp->t_ispeed)==0) {
tp->t_state |= TS_HUPCLS;
dmctl(unit, DML_OFF, DMSET);
splx(s);
return;
}
lpar = ((tp->t_ospeed)<<10) | ((tp->t_ispeed)<<6);
if ((tp->t_ispeed) == B134)
lpar |= BITS6|PENABLE|HDUPLX;
else if (tp->t_flags & (RAW|LITOUT|PASS8))
lpar |= BITS8;
else
lpar |= BITS7|PENABLE;
if ((tp->t_flags&EVENP) == 0)
lpar |= OPAR;
if ((tp->t_ospeed) == B110)
lpar |= TWOSB;
addr->dhlpr = lpar;
splx(s);
}
/*
* DH11 transmitter interrupt.
* Restart each line which used to be active but has
* terminated transmission since the last interrupt.
*/
dhxint(dh)
int dh;
{
register struct tty *tp;
register struct dhdevice *addr;
short ttybit, bar, *sbar;
register struct uba_device *ui;
register int unit;
u_short cntr;
ui = dhinfo[dh];
addr = (struct dhdevice *)ui->ui_addr;
if (addr->un.dhcsr & DH_NXM) {
addr->un.dhcsr |= DH_CNI;
printf("dh%d: NXM\n", dh);
}
sbar = &dhsar[dh];
bar = *sbar & ~addr->dhbar;
unit = dh * 16; ttybit = 1;
addr->un.dhcsr &= (short)~DH_TI;
for (; bar; unit++, ttybit <<= 1) {
if (bar & ttybit) {
*sbar &= ~ttybit;
bar &= ~ttybit;
tp = &dh11[unit];
tp->t_state &= ~TS_BUSY;
if (tp->t_state&TS_FLUSH)
tp->t_state &= ~TS_FLUSH;
else {
addr->un.dhcsrl = (unit&017)|DH_IE;
/*
* Do arithmetic in a short to make up
* for lost 16&17 bits.
*/
cntr = addr->dhcar -
UBACVT(tp->t_outq.c_cf, ui->ui_ubanum);
ndflush(&tp->t_outq, (int)cntr);
}
if (tp->t_line)
(*linesw[tp->t_line].l_start)(tp);
else
dhstart(tp);
}
}
}
/*
* Start (restart) transmission on the given DH11 line.
*/
dhstart(tp)
register struct tty *tp;
{
register struct dhdevice *addr;
register int car, dh, unit, nch;
int s;
unit = minor(tp->t_dev);
dh = unit >> 4;
unit &= 0xf;
addr = (struct dhdevice *)tp->t_addr;
/*
* Must hold interrupts in following code to prevent
* state of the tp from changing.
*/
s = spl5();
/*
* If it's currently active, or delaying, no need to do anything.
*/
if (tp->t_state&(TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
goto out;
/*
* If there are sleepers, and output has drained below low
* water mark, wake up the sleepers.
*/
if (tp->t_outq.c_cc<=TTLOWAT(tp)) {
if (tp->t_state&TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup((caddr_t)&tp->t_outq);
}
if (tp->t_wsel) {
selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL);
tp->t_wsel = 0;
tp->t_state &= ~TS_WCOLL;
}
}
/*
* Now restart transmission unless the output queue is
* empty.
*/
if (tp->t_outq.c_cc == 0)
goto out;
if (tp->t_flags & (RAW|LITOUT))
nch = ndqb(&tp->t_outq, 0);
else {
nch = ndqb(&tp->t_outq, 0200);
/*
* If first thing on queue is a delay process it.
*/
if (nch == 0) {
nch = getc(&tp->t_outq);
timeout(ttrstrt, (caddr_t)tp, (nch&0x7f)+6);
tp->t_state |= TS_TIMEOUT;
goto out;
}
}
/*
* If characters to transmit, restart transmission.
*/
if (nch) {
car = UBACVT(tp->t_outq.c_cf, dhinfo[dh]->ui_ubanum);
addr->un.dhcsrl = unit|((car>>12)&0x30)|DH_IE;
/*
* The following nonsense with short word
* is to make sure the dhbar |= word below
* is done with an interlocking bisw2 instruction.
*/
{ short word = 1 << unit;
dhsar[dh] |= word;
addr->dhcar = car;
addr->dhbcr = -nch;
addr->dhbar |= word;
}
tp->t_state |= TS_BUSY;
}
out:
splx(s);
}
/*
* Stop output on a line, e.g. for ^S/^Q or output flush.
*/
/*ARGSUSED*/
dhstop(tp, flag)
register struct tty *tp;
{
register struct dhdevice *addr;
register int unit, s;
addr = (struct dhdevice *)tp->t_addr;
/*
* Block input/output interrupts while messing with state.
*/
s = spl5();
if (tp->t_state & TS_BUSY) {
/*
* Device is transmitting; stop output
* by selecting the line and setting the byte
* count to -1. We will clean up later
* by examining the address where the dh stopped.
*/
unit = minor(tp->t_dev);
addr->un.dhcsrl = (unit&017) | DH_IE;
if ((tp->t_state&TS_TTSTOP)==0)
tp->t_state |= TS_FLUSH;
addr->dhbcr = -1;
}
splx(s);
}
/*
* Reset state of driver if UBA reset was necessary.
* Reset the csrl and lpr registers on open lines, and
* restart transmitters.
*/
dhreset(uban)
int uban;
{
register int dh, unit;
register struct tty *tp;
register struct uba_device *ui;
int i;
dh = 0;
for (dh = 0; dh < NDH; dh++) {
ui = dhinfo[dh];
if (ui == 0 || ui->ui_alive == 0 || ui->ui_ubanum != uban)
continue;
printf(" dh%d", dh);
if (dh_ubinfo[uban]) {
dh_ubinfo[uban] = uballoc(uban, (caddr_t)cfree,
nclist*sizeof (struct cblock), 0);
cbase[uban] = UBAI_ADDR(dh_ubinfo[uban]);
}
((struct dhdevice *)ui->ui_addr)->un.dhcsr |= DH_IE;
((struct dhdevice *)ui->ui_addr)->dhsilo = 0;
unit = dh * 16;
for (i = 0; i < 16; i++) {
tp = &dh11[unit];
if (tp->t_state & (TS_ISOPEN|TS_WOPEN)) {
dhparam(unit);
dmctl(unit, DML_ON, DMSET);
tp->t_state &= ~TS_BUSY;
dhstart(tp);
}
unit++;
}
}
dhsilos = 0;
}
int dhtransitions, dhslowtimers, dhfasttimers; /*DEBUG*/
/*
* At software clock interrupt time, check status.
* Empty all the dh silos that are in use, and decide whether
* to turn any silos off or on.
*/
dhtimer()
{
register int dh, s;
static int timercalls;
if (dhsilos) {
dhfasttimers++; /*DEBUG*/
timercalls++;
s = spl5();
for (dh = 0; dh < NDH; dh++)
if (dhsilos & (1 << dh))
dhrint(dh);
splx(s);
}
if ((dhsilos == 0) || ((timercalls += FASTTIMER) >= hz)) {
dhslowtimers++; /*DEBUG*/
timercalls = 0;
for (dh = 0; dh < NDH; dh++) {
ave(dhrate[dh], dhchars[dh], 8);
if ((dhchars[dh] > dhhighrate) &&
((dhsilos & (1 << dh)) == 0)) {
((struct dhdevice *)(dhinfo[dh]->ui_addr))->dhsilo =
(dhchars[dh] > 500? 32 : 16);
dhsilos |= (1 << dh);
dhtransitions++; /*DEBUG*/
} else if ((dhsilos & (1 << dh)) &&
(dhrate[dh] < dhlowrate)) {
((struct dhdevice *)(dhinfo[dh]->ui_addr))->dhsilo = 0;
dhsilos &= ~(1 << dh);
}
dhchars[dh] = 0;
}
}
timeout(dhtimer, (caddr_t) 0, dhsilos? FASTTIMER: hz);
}
/*
* Turn on the line associated with dh dev.
*/
dmopen(dev)
dev_t dev;
{
register struct tty *tp;
register struct dmdevice *addr;
register struct uba_device *ui;
register int unit;
register int dm;
int s;
unit = minor(dev);
dm = unit >> 4;
tp = &dh11[unit];
unit &= 0xf;
if (dm >= NDH || (ui = dminfo[dm]) == 0 || ui->ui_alive == 0) {
tp->t_state |= TS_CARR_ON;
return;
}
addr = (struct dmdevice *)ui->ui_addr;
s = spl5();
addr->dmcsr &= ~DM_SE;
while (addr->dmcsr & DM_BUSY)
;
addr->dmcsr = unit;
addr->dmlstat = DML_ON;
if ((addr->dmlstat&DML_CAR) || (dhsoftCAR[dm]&(1<<unit)))
tp->t_state |= TS_CARR_ON;
addr->dmcsr = DM_IE|DM_SE;
while ((tp->t_state&TS_CARR_ON)==0)
sleep((caddr_t)&tp->t_rawq, TTIPRI);
splx(s);
}
/*
* Dump control bits into the DM registers.
*/
dmctl(dev, bits, how)
dev_t dev;
int bits, how;
{
register struct uba_device *ui;
register struct dmdevice *addr;
register int unit, s;
int dm;
unit = minor(dev);
dm = unit >> 4;
if ((ui = dminfo[dm]) == 0 || ui->ui_alive == 0)
return;
addr = (struct dmdevice *)ui->ui_addr;
s = spl5();
addr->dmcsr &= ~DM_SE;
while (addr->dmcsr & DM_BUSY)
;
addr->dmcsr = unit & 0xf;
switch(how) {
case DMSET:
addr->dmlstat = bits;
break;
case DMBIS:
addr->dmlstat |= bits;
break;
case DMBIC:
addr->dmlstat &= ~bits;
break;
}
addr->dmcsr = DM_IE|DM_SE;
splx(s);
}
/*
* DM11 interrupt; deal with carrier transitions.
*/
dmintr(dm)
register int dm;
{
register struct uba_device *ui;
register struct tty *tp;
register struct dmdevice *addr;
int unit;
ui = dminfo[dm];
if (ui == 0)
return;
addr = (struct dmdevice *)ui->ui_addr;
if (addr->dmcsr&DM_DONE) {
if (addr->dmcsr&DM_CF) {
unit = addr->dmcsr & 0xf;
tp = &dh11[(dm << 4) + unit];
if (addr->dmlstat & DML_CAR)
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
else if ((dhsoftCAR[dm] & (1<<unit)) == 0 &&
(*linesw[tp->t_line].l_modem)(tp, 0) == 0)
addr->dmlstat = 0;
}
addr->dmcsr = DM_IE|DM_SE;
}
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.