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BSD 4_3_Reno release
[unix-history] / usr / src / sys / tahoevba / vx.c
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Computer Consoles Inc.
*
* Redistribution is only permitted until one year after the first shipment
* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
* binary forms are permitted provided that: (1) source distributions retain
* this entire copyright notice and comment, and (2) distributions including
* binaries display the following acknowledgement: This product includes
* software developed by the University of California, Berkeley and its
* contributors'' in the documentation or other materials provided with the
* distribution and in all advertising materials mentioning features or use
* of this software. Neither the name of the University nor the names of
* its contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)vx.c 7.11 (Berkeley) 6/28/90
*/
#include "vx.h"
#if NVX > 0
/*
* VIOC-X driver
*/
#ifdef VXPERF
#define DOSCOPE
#endif
#include "param.h"
#include "ioctl.h"
#include "tty.h"
#include "user.h"
#include "map.h"
#include "buf.h"
#include "conf.h"
#include "file.h"
#include "proc.h"
#include "vm.h"
#include "kernel.h"
#include "syslog.h"
#include "../tahoe/pte.h"
#include "../tahoevba/vbavar.h"
#include "../tahoevba/vbaparam.h"
#include "../tahoevba/vxreg.h"
#include "../tahoevba/scope.h"
#ifdef VX_DEBUG
long vxintr4 = 0;
#define VXERR4 1
#define VXNOBUF 2
long vxdebug = 0;
#define VXVCM 1
#define VXVCC 2
#define VXVCX 4
#endif
/*
* Interrupt type bits passed to vinthandl().
*/
#define CMDquals 0 /* command completed interrupt */
#define RSPquals 1 /* command response interrupt */
#define UNSquals 2 /* unsolicited interrupt */
#define VXUNIT(n) ((n) >> 4)
#define VXPORT(n) ((n) & 0xf)
struct tty vx_tty[NVX*16];
#ifndef lint
int nvx = NVX*16;
#endif
int vxstart(), ttrstrt();
struct vxcmd *vobtain(), *nextcmd();
/*
* Driver information for auto-configuration stuff.
*/
int vxprobe(), vxattach(), vxrint();
struct vba_device *vxinfo[NVX];
long vxstd[] = { 0 };
struct vba_driver vxdriver =
{ vxprobe, 0, vxattach, 0, vxstd, "vx", vxinfo };
struct vx_softc {
struct vxdevice *vs_addr; /* H/W address */
u_char vs_type; /* 0: viox-x/vioc-b, 1: vioc-bop */
u_char vs_bop; /* bop board # for vioc-bop's */
u_char vs_loport; /* low port nbr */
u_char vs_hiport; /* high port nbr */
u_short vs_nbr; /* viocx number */
u_short vs_maxcmd; /* max number of concurrent cmds */
u_short vs_silosiz; /* silo size */
short vs_vers; /* vioc/pvioc version */
#define VXV_OLD 0 /* PVIOCX | VIOCX */
#define VXV_NEW 1 /* NPVIOCX | NVIOCX */
short vs_state; /* controller state */
#define VXS_READY 0 /* ready for commands */
#define VXS_RESET 1 /* in process of reseting */
u_short vs_softCAR; /* soft carrier */
u_int vs_ivec; /* interrupt vector base */
caddr_t vs_mricmd; /* most recent issued cmd */
/* The remaining fields are zeroed on reset... */
#define vs_zero vs_xmtcnt
int vs_xmtcnt; /* xmit commands pending */
struct vxcmd *vs_avail;/* next available command buffer */
struct vxcmd *vs_build;
struct vxcmd vs_lst[NVCXBUFS];
struct vcmds vs_cmds;
} vx_softc[NVX];
struct speedtab vxspeedtab[] = {
EXTA, V19200,
EXTB, V19200,
19200, V19200,
9600, 13,
4800, 12,
2400, 11,
1800, 10,
1200, 9,
600, 8,
300, 7,
200, 6,
150, 5,
134, 4,
110, 3,
75, 2,
50, 1,
0, 0,
-1, -1,
};
vxprobe(reg, vi)
caddr_t reg;
struct vba_device *vi;
{
register int br, cvec; /* must be r12, r11 */
register struct vxdevice *vp;
register struct vx_softc *vs;
struct pte *dummypte;
#ifdef lint
br = 0; cvec = br; br = cvec;
vackint(0); vunsol(0); vcmdrsp(0);
#ifdef VX_DEBUG
vxfreset(0);
#endif
#endif /* lint */
/*
* If on an HCX-9, the device has a 32-bit address,
* and we receive that address so we can set up a map.
* On VERSAbus devices, the address is 24-bit, and is
* already mapped (into vmem[]) by autoconf.
*/
if (!(reg >= vmem && reg < &vmem[ctob(VBIOSIZE)]) && /* XXX */
!vbmemalloc(16, reg, &dummypte, &reg)) {
printf("vx%d: vbmemalloc failed.\n", vi->ui_unit);
return(0);
}
vp = (struct vxdevice *)reg;
if (badaddr((caddr_t)vp, 1))
return (0);
vp->v_fault = 0;
vp->v_vioc = V_BSY;
vp->v_hdwre = V_RESET; /* reset interrupt */
DELAY(4000000);
if (vp->v_fault != VXF_READY)
return (0);
vs = &vx_softc[vi->ui_unit];
#ifdef notdef
/*
* Align vioc interrupt vector base to 4 vector
* boundary and fitting in 8 bits (is this necessary,
* wish we had documentation).
*/
if ((vi->ui_hd->vh_lastiv -= 3) > 0xff)
vi->ui_hd->vh_lastiv = 0xff;
vs->vs_ivec = vi->ui_hd->vh_lastiv = vi->ui_hd->vh_lastiv &~ 0x3;
#else
vs->vs_ivec = 0x40+vi->ui_unit*4;
#endif
br = 0x18, cvec = vs->vs_ivec; /* XXX */
return (sizeof (struct vxdevice));
}
vxattach(vi)
register struct vba_device *vi;
{
register struct vx_softc *vs = &vx_softc[vi->ui_unit];
vs->vs_softCAR = vi->ui_flags;
vs->vs_addr = (struct vxdevice *)vi->ui_addr;
vxinit(vi->ui_unit, 1);
}
/*
* Open a VX line.
*/
/*ARGSUSED*/
vxopen(dev, flag)
dev_t dev;
int flag;
{
register struct tty *tp; /* pointer to tty struct for port */
register struct vx_softc *vs;
register struct vba_device *vi;
int unit, vx, s, error = 0;
int vxparam();
unit = minor(dev);
vx = VXUNIT(unit);
if (vx >= NVX || (vi = vxinfo[vx])== 0 || vi->ui_alive == 0)
return (ENXIO);
vs = &vx_softc[vx];
tp = &vx_tty[unit];
unit = VXPORT(unit);
if (tp->t_state&TS_XCLUDE && u.u_uid != 0)
return (EBUSY);
if (unit < vs->vs_loport || unit > vs->vs_hiport)
return (ENXIO);
tp->t_addr = (caddr_t)vs;
tp->t_oproc = vxstart;
tp->t_param = vxparam;
tp->t_dev = dev;
s = spl8();
if ((tp->t_state&TS_ISOPEN) == 0) {
tp->t_state |= TS_WOPEN;
ttychars(tp);
if (tp->t_ispeed == 0) {
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
}
vxparam(tp, &tp->t_termios);
ttsetwater(tp);
}
vcmodem(dev, VMOD_ON);
while (!(flag&O_NONBLOCK) && !(tp->t_cflag&CLOCAL) &&
(tp->t_state&TS_CARR_ON) == 0) {
tp->t_state |= TS_WOPEN;
if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0))
break;
}
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev,tp);
splx(s);
return (error);
}
/*
* Close a VX line.
*/
/*ARGSUSED*/
vxclose(dev, flag)
dev_t dev;
int flag;
{
register struct tty *tp;
int unit, s, error = 0;
unit = minor(dev);
tp = &vx_tty[unit];
s = spl8();
(*linesw[tp->t_line].l_close)(tp);
if (tp->t_cflag & HUPCL || (tp->t_state & TS_ISOPEN) == 0)
vcmodem(dev, VMOD_OFF);
/* wait for the last response */
while (tp->t_state&TS_FLUSH && error == 0)
error = tsleep((caddr_t)&tp->t_state, TTOPRI | PCATCH,
ttclos, 0);
splx(s);
if (error)
return (error);
return (ttyclose(tp));
}
/*
* Read from a VX line.
*/
vxread(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
struct tty *tp = &vx_tty[minor(dev)];
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
/*
* write on a VX line
*/
vxwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
register struct tty *tp = &vx_tty[minor(dev)];
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
/*
* VIOCX unsolicited interrupt.
*/
vxrint(vx)
register vx;
{
register struct tty *tp, *tp0;
register struct vxdevice *addr;
register struct vx_softc *vs;
struct vba_device *vi;
register int nc, c;
register struct silo {
u_char data, port;
} *sp;
short *osp;
int overrun = 0;
vi = vxinfo[vx];
if (vi == 0 || vi->ui_alive == 0)
return;
addr = (struct vxdevice *)vi->ui_addr;
switch (addr->v_uqual&037) {
case 0:
break;
case 2:
if (addr->v_ustat == VP_SILO_OFLOW)
log(LOG_ERR, "vx%d: input silo overflow\n", vx);
else {
printf("vx%d: vc proc err, ustat %x\n",
vx, addr->v_ustat);
vxstreset(vx);
}
return;
case 3:
vcmintr(vx);
return;
case 4:
return;
default:
printf("vx%d: vc uqual err, uqual %x\n", vx, addr->v_uqual);
vxstreset(vx);
return;
}
vs = &vx_softc[vx];
if (vs->vs_vers == VXV_NEW)
sp = (struct silo *)((caddr_t)addr + *(short *)addr->v_usdata);
else
sp = (struct silo *)((caddr_t)addr+VX_SILO+(addr->v_usdata[0]<<6));
nc = *(osp = (short *)sp);
if (nc == 0)
return;
if (vs->vs_vers == VXV_NEW && nc > vs->vs_silosiz) {
printf("vx%d: %d exceeds silo size\n", nc);
nc = vs->vs_silosiz;
}
tp0 = &vx_tty[vx*16];
sp = (struct silo *)(((short *)sp)+1);
for (; nc > 0; nc--, sp = (struct silo *)(((short *)sp)+1)) {
c = sp->port & 017;
if (vs->vs_loport > c || c > vs->vs_hiport)
continue;
tp = tp0 + c;
if( (tp->t_state&TS_ISOPEN) == 0) {
wakeup((caddr_t)&tp->t_rawq);
continue;
}
c = sp->data&((tp->t_cflag&CSIZE)==CS8 ? 0xff : 0x7f);
if ((sp->port&VX_RO) == VX_RO && !overrun) {
log(LOG_ERR, "vx%d: receiver overrun\n", vi->ui_unit);
overrun = 1;
continue;
}
if (sp->port&VX_PE)
c |= TTY_PE;
if (sp->port&VX_FE)
c |= TTY_FE;
(*linesw[tp->t_line].l_rint)(c, tp);
}
*osp = 0;
}
/*
* Ioctl for VX.
*/
vxioctl(dev, cmd, data, flag)
dev_t dev;
caddr_t data;
{
register struct tty *tp;
int error;
tp = &vx_tty[minor(dev)];
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)
return (error);
return (ENOTTY);
}
vxparam(tp, t)
struct tty *tp;
struct termios *t;
{
return (vxcparam(tp, t, 1));
}
/*
* Set parameters from open or stty into the VX hardware
* registers.
*/
vxcparam(tp, t, wait)
struct tty *tp;
struct termios *t;
int wait;
{
register struct vx_softc *vs;
register struct vxcmd *cp;
int s, error = 0;
int speedcode = ttspeedtab(t->c_ospeed, vxspeedtab);
if (speedcode < 0 || (t->c_ispeed != t->c_ospeed && t->c_ispeed))
return (EINVAL);
vs = (struct vx_softc *)tp->t_addr;
cp = vobtain(vs);
s = spl8();
/*
* Construct ``load parameters'' command block
* to setup baud rates, xon-xoff chars, parity,
* and stop bits for the specified port.
*/
cp->cmd = VXC_LPARAX;
cp->par[1] = VXPORT(minor(tp->t_dev));
/*
* note: if the hardware does flow control, ^V doesn't work
* to escape ^S
*/
if (t->c_iflag&IXON) {
if (t->c_cc[VSTART] == _POSIX_VDISABLE)
cp->par[2] = 0;
else
cp->par[2] = t->c_cc[VSTART];
if (t->c_cc[VSTOP] == _POSIX_VDISABLE)
cp->par[3] = 0;
else
cp->par[3] = t->c_cc[VSTOP];
} else
cp->par[2] = cp->par[3] = 0;
#ifdef notnow
switch (t->c_cflag & CSIZE) { /* XXX */
case CS8:
#endif
cp->par[4] = BITS8; /* 8 bits of data */
#ifdef notnow
break;
case CS7:
cp->par[4] = BITS7; /* 7 bits of data */
break;
case CS6:
cp->par[4] = BITS6; /* 6 bits of data */
break;
case CS5:
cp->par[4] = BITS5; /* 5 bits of data */
break;
}
if ((t->c_cflag & PARENB) == 0) /* XXX */
#endif
cp->par[7] = VNOPARITY; /* no parity */
#ifdef notnow
else if (t->c_cflag&PARODD)
cp->par[7] = VODDP; /* odd parity */
else
cp->par[7] = VEVENP; /* even parity */
#endif
cp->par[5] = (t->c_cflag&CSTOPB) ? VSTOP2 : VSTOP1;
cp->par[6] = speedcode;
if (vcmd((int)vs->vs_nbr, (caddr_t)&cp->cmd) && wait)
error = tsleep((caddr_t)cp, TTIPRI | PCATCH, ttyout, 0);
if ((t->c_ospeed)==0) {
tp->t_cflag |= HUPCL;
vcmodem(tp->t_dev, VMOD_OFF);
}
splx(s);
return (error);
}
/*
* VIOCX command response interrupt.
* For transmission, restart output to any active port.
* For all other commands, just clean up.
*/
vxxint(vx, cp)
register int vx;
register struct vxcmd *cp;
{
register struct vxmit *vp;
register struct tty *tp, *tp0;
register struct vx_softc *vs;
vs = &vx_softc[vx];
cp = (struct vxcmd *)((long *)cp-1);
switch (cp->cmd&0xff00) {
case VXC_LIDENT: /* initialization complete */
if (vs->vs_state == VXS_RESET) {
vxfnreset(vx, cp);
vinthandl(vx, ((V_BSY|RSPquals) << 8)|V_INTR);
}
cp->cmd++;
return;
case VXC_XMITDTA:
case VXC_XMITIMM:
break;
case VXC_LPARAX:
wakeup((caddr_t)cp);
/* fall thru... */
default: /* VXC_MDMCTL or VXC_FDTATOX */
vrelease(vs, cp);
if (vs->vs_state == VXS_RESET)
vinthandl(vx, ((V_BSY|RSPquals) << 8)|V_INTR);
return;
}
tp0 = &vx_tty[vx*16];
vp = (struct vxmit *)(cp->par + (cp->cmd & 07)*sizeof (struct vxmit));
for (; vp >= (struct vxmit *)cp->par; vp--) {
tp = tp0 + (vp->line & 017);
tp->t_state &= ~TS_BUSY;
if (tp->t_state & TS_FLUSH) {
tp->t_state &= ~TS_FLUSH;
wakeup((caddr_t)&tp->t_state);
} else
ndflush(&tp->t_outq, vp->bcount+1);
}
vrelease(vs, cp);
if (vs->vs_vers == VXV_NEW)
(*linesw[tp->t_line].l_start)(tp);
else {
tp0 = &vx_tty[vx*16 + vs->vs_hiport];
for(tp = &vx_tty[vx*16 + vs->vs_loport]; tp <= tp0; tp++)
(*linesw[tp->t_line].l_start)(tp);
if ((cp = nextcmd(vs)) != NULL) { /* command to send? */
vs->vs_xmtcnt++;
(void) vcmd(vx, (caddr_t)&cp->cmd);
}
}
vs->vs_xmtcnt--;
}
/*
* Force out partial XMIT command after timeout
*/
vxforce(vs)
register struct vx_softc *vs;
{
register struct vxcmd *cp;
int s;
s = spl8();
if ((cp = nextcmd(vs)) != NULL) {
vs->vs_xmtcnt++;
(void) vcmd((int)vs->vs_nbr, (caddr_t)&cp->cmd);
}
splx(s);
}
/*
* Start (restart) transmission on the given VX line.
*/
vxstart(tp)
register struct tty *tp;
{
register short n;
register struct vx_softc *vs;
int s, port;
s = spl8();
port = VXPORT(minor(tp->t_dev));
vs = (struct vx_softc *)tp->t_addr;
if ((tp->t_state&(TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) == 0) {
if (tp->t_outq.c_cc <= tp->t_lowat) {
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;
}
}
if (tp->t_outq.c_cc == 0) {
splx(s);
return;
}
scope_out(3);
if (1 || !(tp->t_oflag&OPOST)) /* XXX */
n = ndqb(&tp->t_outq, 0);
else {
n = ndqb(&tp->t_outq, 0200);
if (n == 0) {
n = getc(&tp->t_outq);
timeout(ttrstrt, (caddr_t)tp, (n&0177)+6);
tp->t_state |= TS_TIMEOUT;
n = 0;
}
}
if (n) {
tp->t_state |= TS_BUSY;
vsetq(vs, port, (char *)tp->t_outq.c_cf, n);
}
}
splx(s);
}
/*
* Stop output on a line.
*/
vxstop(tp)
register struct tty *tp;
{
int s;
s = spl8();
if (tp->t_state&TS_BUSY)
if ((tp->t_state&TS_TTSTOP) == 0)
tp->t_state |= TS_FLUSH;
splx(s);
}
static int vxbbno = -1;
/*
* VIOCX Initialization. Makes free lists of command buffers.
* Resets all viocx's. Issues a LIDENT command to each
* viocx to establish interrupt vectors and logical port numbers.
*/
vxinit(vx, wait)
register int vx;
int wait;
{
register struct vx_softc *vs;
register struct vxdevice *addr;
register struct vxcmd *cp;
register char *resp;
register int j;
char type, *typestring;
vs = &vx_softc[vx];
addr = vs->vs_addr;
type = addr->v_ident;
vs->vs_vers = (type&VXT_NEW) ? VXV_NEW : VXV_OLD;
if (vs->vs_vers == VXV_NEW)
vs->vs_silosiz = addr->v_maxsilo;
switch (type) {
case VXT_VIOCX:
case VXT_VIOCX|VXT_NEW:
typestring = "VIOC-X";
/* set soft carrier for printer ports */
for (j = 0; j < 16; j++)
if (vs->vs_softCAR & (1 << j) ||
addr->v_portyp[j] == VXT_PARALLEL) {
vs->vs_softCAR |= 1 << j;
addr->v_dcd |= 1 << j;
}
break;
case VXT_PVIOCX:
case VXT_PVIOCX|VXT_NEW:
typestring = "VIOC-X (old connector panel)";
break;
case VXT_VIOCBOP: /* VIOC-BOP */
vs->vs_type = 1;
vs->vs_bop = ++vxbbno;
printf("VIOC-BOP no. %d at %x\n", vs->vs_bop, addr);
goto unsup;
default:
printf("vx%d: unknown type %x\n", vx, type);
unsup:
vxinfo[vx]->ui_alive = 0;
return;
}
vs->vs_nbr = vx; /* assign board number */
vs->vs_maxcmd = (vs->vs_vers == VXV_NEW) ? 24 : 4;
/*
* Initialize all cmd buffers by linking them
* into a free list.
*/
for (j = 0; j < NVCXBUFS; j++) {
cp = &vs->vs_lst[j];
cp->c_fwd = &vs->vs_lst[j+1];
}
vs->vs_avail = &vs->vs_lst[0]; /* set idx to 1st free buf */
cp->c_fwd = (struct vxcmd *)0; /* mark last buf in free list */
/*
* Establish the interrupt vectors and define the port numbers.
*/
cp = vobtain(vs);
cp->cmd = VXC_LIDENT;
cp->par[0] = vs->vs_ivec; /* ack vector */
cp->par[1] = cp->par[0]+1; /* cmd resp vector */
cp->par[3] = cp->par[0]+2; /* unsol intr vector */
cp->par[4] = 15; /* max ports, no longer used */
cp->par[5] = 0; /* set 1st port number */
(void) vcmd(vx, (caddr_t)&cp->cmd);
if (!wait)
return;
for (j = 0; cp->cmd == VXC_LIDENT && j < 4000000; j++)
;
if (j >= 4000000)
printf("vx%d: didn't respond to LIDENT\n", vx);
/* calculate address of response buffer */
resp = (char *)addr + (addr->v_rspoff&0x3fff);
if (resp[0] != 0 && (resp[0]&0177) != 3) {
vrelease(vs, cp); /* init failed */
return;
}
vs->vs_loport = cp->par[5];
vs->vs_hiport = cp->par[7];
printf("vx%d: %s%s, ports %d-%d\n", vx,
(vs->vs_vers == VXV_NEW) ? "" : "old ", typestring,
vs->vs_loport, vs->vs_hiport);
vrelease(vs, cp);
}
/*
* Obtain a command buffer
*/
struct vxcmd *
vobtain(vs)
register struct vx_softc *vs;
{
register struct vxcmd *p;
int s;
s = spl8();
p = vs->vs_avail;
if (p == (struct vxcmd *)0) {
#ifdef VX_DEBUG
if (vxintr4&VXNOBUF)
vxintr4 &= ~VXNOBUF;
#endif
printf("vx%d: no buffers\n", vs->vs_nbr);
vxstreset(vs->vs_nbr);
splx(s);
return (vobtain(vs));
}
vs->vs_avail = p->c_fwd;
splx(s);
return ((struct vxcmd *)p);
}
/*
* Release a command buffer
*/
vrelease(vs, cp)
register struct vx_softc *vs;
register struct vxcmd *cp;
{
int s;
#ifdef VX_DEBUG
if (vxintr4&VXNOBUF)
return;
#endif
s = spl8();
cp->c_fwd = vs->vs_avail;
vs->vs_avail = cp;
splx(s);
}
struct vxcmd *
nextcmd(vs)
register struct vx_softc *vs;
{
register struct vxcmd *cp;
int s;
s = spl8();
cp = vs->vs_build;
vs->vs_build = (struct vxcmd *)0;
splx(s);
return (cp);
}
/*
* Assemble transmits into a multiple command;
* up to 8 transmits to 8 lines can be assembled together
* (on PVIOCX only).
*/
vsetq(vs, line, addr, n)
register struct vx_softc *vs;
caddr_t addr;
{
register struct vxcmd *cp;
register struct vxmit *mp;
/*
* Grab a new command buffer or append
* to the current one being built.
*/
cp = vs->vs_build;
if (cp == (struct vxcmd *)0) {
cp = vobtain(vs);
vs->vs_build = cp;
cp->cmd = VXC_XMITDTA;
} else {
if ((cp->cmd & 07) == 07 || vs->vs_vers == VXV_NEW) {
printf("vx%d: setq overflow\n", vs-vx_softc);
vxstreset((int)vs->vs_nbr);
return;
}
cp->cmd++;
}
/*
* Select the next vxmit buffer and copy the
* characters into the buffer (if there's room
* and the device supports ``immediate mode'',
* or store an indirect pointer to the data.
*/
mp = (struct vxmit *)(cp->par + (cp->cmd & 07)*sizeof (struct vxmit));
mp->bcount = n-1;
mp->line = line;
if (vs->vs_vers == VXV_NEW && n <= sizeof (mp->ostream)) {
cp->cmd = VXC_XMITIMM;
bcopy(addr, mp->ostream, (unsigned)n);
} else {
/* get system address of clist block */
addr = (caddr_t)vtoph((struct proc *)0, (unsigned)addr);
bcopy((caddr_t)&addr, mp->ostream, sizeof (addr));
}
/*
* We send the data immediately if a VIOCX,
* the command buffer is full, or if we've nothing
* currently outstanding. If we don't send it,
* set a timeout to force the data to be sent soon.
*/
if (vs->vs_vers == VXV_NEW || (cp->cmd & 07) == 7 ||
vs->vs_xmtcnt == 0) {
vs->vs_xmtcnt++;
(void) vcmd((int)vs->vs_nbr, (char *)&cp->cmd);
vs->vs_build = 0;
} else
timeout(vxforce, (caddr_t)vs, 3);
}
/*
* Write a command out to the VIOC
*/
vcmd(vx, cmdad)
register int vx;
register caddr_t cmdad;
{
register struct vcmds *cp;
register struct vx_softc *vs = &vx_softc[vx];
int s;
s = spl8();
/*
* When the vioc is resetting, don't process
* anything other than VXC_LIDENT commands.
*/
if (vs->vs_state == VXS_RESET && cmdad != NULL) {
struct vxcmd *vcp = (struct vxcmd *)(cmdad-sizeof (vcp->c_fwd));
if (vcp->cmd != VXC_LIDENT) {
vrelease(vs, vcp);
return (0);
}
}
cp = &vs->vs_cmds;
if (cmdad != (caddr_t)0) {
cp->cmdbuf[cp->v_fill] = cmdad;
if (++cp->v_fill >= VC_CMDBUFL)
cp->v_fill = 0;
if (cp->v_fill == cp->v_empty) {
printf("vx%d: cmd q overflow\n", vx);
vxstreset(vx);
splx(s);
return (0);
}
cp->v_cmdsem++;
}
if (cp->v_cmdsem && cp->v_curcnt < vs->vs_maxcmd) {
cp->v_cmdsem--;
cp->v_curcnt++;
vinthandl(vx, ((V_BSY|CMDquals) << 8)|V_INTR);
}
splx(s);
return (1);
}
/*
* VIOC acknowledge interrupt. The VIOC has received the new
* command. If no errors, the new command becomes one of 16 (max)
* current commands being executed.
*/
vackint(vx)
register vx;
{
register struct vxdevice *vp;
register struct vcmds *cp;
struct vx_softc *vs;
int s;
scope_out(5);
vs = &vx_softc[vx];
if (vs->vs_type) /* Its a BOP */
return;
s = spl8();
vp = vs->vs_addr;
cp = &vs->vs_cmds;
if (vp->v_vcid&V_ERR) {
register char *resp;
register i;
printf("vx%d: ackint error type %x v_dcd %x\n", vx,
vp->v_vcid & 07, vp->v_dcd & 0xff);
resp = (char *)vs->vs_mricmd;
for (i = 0; i < 16; i++)
printf("%x ", resp[i]&0xff);
printf("\n");
splx(s);
vxstreset(vx);
return;
}
if ((vp->v_hdwre&017) == CMDquals) {
#ifdef VX_DEBUG
if (vxintr4 & VXERR4) { /* causes VIOC INTR ERR 4 */
struct vxcmd *cp1, *cp0;
cp0 = (struct vxcmd *)
((caddr_t)cp->cmdbuf[cp->v_empty]-sizeof (cp0->c_fwd));
if (cp0->cmd == VXC_XMITDTA || cp0->cmd == VXC_XMITIMM) {
cp1 = vobtain(vs);
*cp1 = *cp0;
vxintr4 &= ~VXERR4;
(void) vcmd(vx, &cp1->cmd);
}
}
#endif
cp->v_curcmd[vp->v_vcid & VCMDLEN-1] = cp->cmdbuf[cp->v_empty];
if (++cp->v_empty >= VC_CMDBUFL)
cp->v_empty = 0;
}
if (++cp->v_itrempt >= VC_IQLEN)
cp->v_itrempt = 0;
vintempt(vx);
splx(s);
(void) vcmd(vx, (caddr_t)0); /* queue next cmd, if any */
}
/*
* Command Response interrupt. The Vioc has completed
* a command. The command may now be returned to
* the appropriate device driver.
*/
vcmdrsp(vx)
register vx;
{
register struct vxdevice *vp;
register struct vcmds *cp;
register caddr_t cmd;
register struct vx_softc *vs;
register char *resp;
register k;
register int s;
scope_out(6);
vs = &vx_softc[vx];
if (vs->vs_type) { /* Its a BOP */
printf("vx%d: vcmdrsp interrupt\n", vx);
return;
}
s = spl8();
vp = vs->vs_addr;
cp = &vs->vs_cmds;
resp = (char *)vp + (vp->v_rspoff&0x7fff);
if (((k = resp[1])&V_UNBSY) == 0) {
printf("vx%d: cmdresp debug\n", vx);
splx(s);
vxstreset(vx);
return;
}
k &= VCMDLEN-1;
cmd = cp->v_curcmd[k];
cp->v_curcmd[k] = (caddr_t)0;
cp->v_curcnt--;
k = *((short *)&resp[4]); /* cmd operation code */
if ((k&0xff00) == VXC_LIDENT) /* want hiport number */
for (k = 0; k < VRESPLEN; k++)
cmd[k] = resp[k+4];
resp[1] = 0;
vxxint(vx, (struct vxcmd *)cmd);
if (vs->vs_state == VXS_READY)
vinthandl(vx, ((V_BSY|RSPquals) << 8)|V_INTR);
splx(s);
}
/*
* Unsolicited interrupt.
*/
vunsol(vx)
register vx;
{
register struct vxdevice *vp;
struct vx_softc *vs;
int s;
scope_out(1);
vs = &vx_softc[vx];
if (vs->vs_type) { /* Its a BOP */
printf("vx%d: vunsol from BOP\n", vx);
return;
}
s = spl8();
vp = vs->vs_addr;
if (vp->v_uqual&V_UNBSY) {
vxrint(vx);
vinthandl(vx, ((V_BSY|UNSquals) << 8)|V_INTR);
#ifdef notdef
} else {
printf("vx%d: unsolicited interrupt error\n", vx);
splx(s);
vxstreset(vx);
#endif
}
splx(s);
}
/*
* Enqueue an interrupt.
*/
vinthandl(vx, item)
register int vx;
register item;
{
register struct vcmds *cp;
int empty;
cp = &vx_softc[vx].vs_cmds;
empty = (cp->v_itrfill == cp->v_itrempt);
cp->v_itrqueu[cp->v_itrfill] = item;
if (++cp->v_itrfill >= VC_IQLEN)
cp->v_itrfill = 0;
if (cp->v_itrfill == cp->v_itrempt) {
printf("vx%d: interrupt q overflow\n", vx);
vxstreset(vx);
} else if (empty)
vintempt(vx);
}
vintempt(vx)
int vx;
{
register struct vcmds *cp;
register struct vxdevice *vp;
register struct vx_softc *vs;
register short item;
register short *intr;
vs = &vx_softc[vx];
vp = vs->vs_addr;
if (vp->v_vioc&V_BSY)
return;
cp = &vs->vs_cmds;
if (cp->v_itrempt == cp->v_itrfill)
return;
item = cp->v_itrqueu[cp->v_itrempt];
intr = (short *)&vp->v_vioc;
switch ((item >> 8)&03) {
case CMDquals: { /* command */
int phys;
if (cp->v_empty == cp->v_fill || vp->v_vcbsy&V_BSY)
break;
vs->vs_mricmd = (caddr_t)cp->cmdbuf[cp->v_empty];
phys = vtoph((struct proc *)0,
(unsigned)cp->cmdbuf[cp->v_empty]);
vp->v_vcp[0] = ((short *)&phys)[0];
vp->v_vcp[1] = ((short *)&phys)[1];
vp->v_vcbsy = V_BSY;
*intr = item;
scope_out(4);
break;
}
case RSPquals: /* command response */
*intr = item;
scope_out(7);
break;
case UNSquals: /* unsolicited interrupt */
vp->v_uqual = 0;
*intr = item;
scope_out(2);
break;
}
}
/*
* Start a reset on a vioc after error (hopefully)
*/
vxstreset(vx)
register int vx;
{
register struct vx_softc *vs;
register struct vxdevice *vp;
register struct vxcmd *cp;
register int j;
extern int vxinreset();
int s;
vs = &vx_softc[vx];
s = spl8();
if (vs->vs_state == VXS_RESET) { /* avoid recursion */
splx(s);
return;
}
vp = vs->vs_addr;
/*
* Zero out the vioc structures, mark the vioc as being
* reset, reinitialize the free command list, reset the vioc
* and start a timer to check on the progress of the reset.
*/
bzero((caddr_t)&vs->vs_zero,
(unsigned)((caddr_t)(vs + 1) - (caddr_t)&vs->vs_zero));
/*
* Setting VXS_RESET prevents others from issuing
* commands while allowing currently queued commands to
* be passed to the VIOC.
*/
vs->vs_state = VXS_RESET;
/* init all cmd buffers */
for (j = 0; j < NVCXBUFS; j++) {
cp = &vs->vs_lst[j];
cp->c_fwd = &vs->vs_lst[j+1];
}
vs->vs_avail = &vs->vs_lst[0];
cp->c_fwd = (struct vxcmd *)0;
printf("vx%d: reset...", vx);
vp->v_fault = 0;
vp->v_vioc = V_BSY;
vp->v_hdwre = V_RESET; /* generate reset interrupt */
timeout(vxinreset, (caddr_t)vx, hz*5);
splx(s);
}
/* continue processing a reset on a vioc after an error (hopefully) */
vxinreset(vx)
int vx;
{
register struct vxdevice *vp;
int s = spl8();
vp = vx_softc[vx].vs_addr;
/*
* See if the vioc has reset.
*/
if (vp->v_fault != VXF_READY) {
printf(" vxreset failed\n");
splx(s);
return;
}
/*
* Send a LIDENT to the vioc and mess with carrier flags
* on parallel printer ports.
*/
vxinit(vx, 0);
splx(s);
}
/*
* Finish the reset on the vioc after an error (hopefully).
*
* Restore modem control, parameters and restart output.
* Since the vioc can handle no more then 24 commands at a time
* and we could generate as many as 48 commands, we must do this in
* phases, issuing no more then 16 commands at a time.
*/
vxfnreset(vx, cp)
register int vx;
register struct vxcmd *cp;
{
register struct vx_softc *vs;
register struct vxdevice *vp;
register struct tty *tp, *tp0;
register int i;
#ifdef notdef
register int on;
#endif
extern int vxrestart();
int s = spl8();
vs = &vx_softc[vx];
vrelease(vs, cp);
vs->vs_state = VXS_READY;
vp = vs->vs_addr;
vp->v_vcid = 0;
/*
* Restore modem information and control.
*/
tp0 = &vx_tty[vx*16];
for (i = vs->vs_loport; i <= vs->vs_hiport; i++) {
tp = tp0 + i;
if (tp->t_state&(TS_ISOPEN|TS_WOPEN)) {
tp->t_state &= ~TS_CARR_ON;
vcmodem(tp->t_dev, VMOD_ON);
if (tp->t_state&TS_CARR_ON)
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
else if (tp->t_state & TS_ISOPEN)
(void)(*linesw[tp->t_line].l_modem)(tp, 0);
}
#ifdef notdef
/*
* If carrier has changed while we were resetting,
* take appropriate action.
*/
on = vp->v_dcd & 1<<i;
if (on && (tp->t_state&TS_CARR_ON) == 0)
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
else if (!on && tp->t_state&TS_CARR_ON)
(void)(*linesw[tp->t_line].l_modem)(tp, 0);
#endif
}
vs->vs_state = VXS_RESET;
timeout(vxrestart, (caddr_t)vx, hz);
splx(s);
}
/*
* Restore a particular aspect of the VIOC.
*/
vxrestart(vx)
int vx;
{
register struct tty *tp, *tp0;
register struct vx_softc *vs;
register int i, count;
int s = spl8();
count = vx >> 8;
vx &= 0xff;
vs = &vx_softc[vx];
vs->vs_state = VXS_READY;
tp0 = &vx_tty[vx*16];
for (i = vs->vs_loport; i <= vs->vs_hiport; i++) {
tp = tp0 + i;
if (count != 0) {
tp->t_state &= ~(TS_BUSY|TS_TIMEOUT);
if (tp->t_state&(TS_ISOPEN|TS_WOPEN))
vxstart(tp); /* restart pending output */
} else {
if (tp->t_state&(TS_WOPEN|TS_ISOPEN))
vxcparam(tp, &tp->t_termios, 0);
}
}
if (count == 0) {
vs->vs_state = VXS_RESET;
timeout(vxrestart, (caddr_t)(vx + 1*256), hz);
} else
printf(" vx reset done\n");
splx(s);
}
vxreset(dev)
dev_t dev;
{
vxstreset((int)VXUNIT(minor(dev))); /* completes asynchronously */
}
#ifdef VX_DEBUG
vxfreset(vx)
register int vx;
{
struct vba_device *vi;
if ((unsigned)vx > NVX || (vi = vxinfo[vx]) == 0 || vi->ui_addr == 0)
return (ENODEV);
vx_softc[vx].vs_state = VXS_READY;
vxstreset(vx);
return (0); /* completes asynchronously */
}
#endif
vcmodem(dev, flag)
dev_t dev;
{
struct tty *tp;
register struct vxcmd *cp;
register struct vx_softc *vs;
register struct vxdevice *kp;
register port;
int unit;
unit = minor(dev);
tp = &vx_tty[unit];
vs = (struct vx_softc *)tp->t_addr;
if (vs->vs_state != VXS_READY)
return;
cp = vobtain(vs);
kp = vs->vs_addr;
port = VXPORT(unit);
/*
* Issue MODEM command
*/
cp->cmd = VXC_MDMCTL;
if (flag == VMOD_ON) {
if (vs->vs_softCAR & (1 << port)) {
cp->par[0] = V_MANUAL | V_DTR_ON | V_RTS;
kp->v_dcd |= (1 << port);
} else
cp->par[0] = V_AUTO | V_DTR_ON;
} else
cp->par[0] = V_DTR_OFF;
cp->par[1] = port;
(void) vcmd((int)vs->vs_nbr, (caddr_t)&cp->cmd);
if ((kp->v_dcd | vs->vs_softCAR) & (1 << port) && flag == VMOD_ON)
tp->t_state |= TS_CARR_ON;
}
/*
* VCMINTR called when an unsolicited interrupt occurs signaling
* some change of modem control state.
*/
vcmintr(vx)
register vx;
{
register struct vxdevice *kp;
register struct tty *tp;
register port;
register struct vx_softc *vs;
vs = &vx_softc[vx];
kp = vs->vs_addr;
port = kp->v_usdata[0] & 017;
tp = &vx_tty[vx*16+port];
if (kp->v_ustat & DCD_ON)
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
else if ((kp->v_ustat & DCD_OFF) &&
((vs->vs_softCAR & (1 << port))) == 0 &&
(*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
register struct vcmds *cp;
register struct vxcmd *cmdp;
/* clear all pending transmits */
if (tp->t_state&(TS_BUSY|TS_FLUSH) &&
vs->vs_vers == VXV_NEW) {
int i, cmdfound = 0;
cp = &vs->vs_cmds;
for (i = cp->v_empty; i != cp->v_fill; ) {
cmdp = (struct vxcmd *)((long *)cp->cmdbuf[i]-1);
if ((cmdp->cmd == VXC_XMITDTA ||
cmdp->cmd == VXC_XMITIMM) &&
((struct vxmit *)cmdp->par)->line == port) {
cmdfound++;
cmdp->cmd = VXC_FDTATOX;
cmdp->par[1] = port;
}
if (++i >= VC_CMDBUFL)
i = 0;
}
if (cmdfound)
tp->t_state &= ~(TS_BUSY|TS_FLUSH);
/* cmd is already in vioc, have to flush it */
else {
cmdp = vobtain(vs);
cmdp->cmd = VXC_FDTATOX;
cmdp->par[1] = port;
(void) vcmd(vx, (caddr_t)&cmdp->cmd);
}
}
} else if ((kp->v_ustat&BRK_CHR) && (tp->t_state&TS_ISOPEN)) {
(*linesw[tp->t_line].l_rint)(TTY_FE, tp);
return;
}
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.