455 lines
12 KiB
C
455 lines
12 KiB
C
/*
|
|
* Copyright (c) 1990 William F. Jolitz, TeleMuse
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This software is a component of "386BSD" developed by
|
|
* William F. Jolitz, TeleMuse.
|
|
* 4. Neither the name of the developer nor the name "386BSD"
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
|
|
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
|
|
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
|
|
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
|
|
* NOT MAKE USE OF THIS WORK.
|
|
*
|
|
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
|
|
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
|
|
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
|
|
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
|
|
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
|
|
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
|
|
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
|
|
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: lpt.c,v 1.9 1993/12/20 09:06:23 mycroft Exp $
|
|
*/
|
|
|
|
/*
|
|
* Device Driver for AT parallel printer port
|
|
* Written by William Jolitz 12/18/90
|
|
*
|
|
* Hacked heavily by Rod Grimes and Eric Haug...
|
|
*/
|
|
|
|
#include "lpt.h"
|
|
#if NLPT > 0
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/user.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/tty.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <machine/pio.h>
|
|
|
|
#include <i386/isa/isa.h>
|
|
#include <i386/isa/isa_device.h>
|
|
#include <i386/isa/lptreg.h>
|
|
|
|
#define LPINITRDY 4 /* wait up to 4 seconds for a ready */
|
|
#define LPTOUTTIME 4 /* wait up to 4 seconds for a ready */
|
|
#define LPPRI (PZERO+8)
|
|
#define BUFSIZE 1024
|
|
|
|
#ifndef DEBUG
|
|
#define lprintf
|
|
#else
|
|
#define lprintf if (lptflag) printf
|
|
int lptflag = 1;
|
|
#endif
|
|
|
|
int lptout();
|
|
#ifdef DEBUG
|
|
int lptflag = 1;
|
|
#endif
|
|
|
|
int lptprobe(), lptattach(), lptintr();
|
|
|
|
struct isa_driver lptdriver = {
|
|
lptprobe, lptattach, "lpt"
|
|
};
|
|
|
|
#define LPTUNIT(s) (((s)>>6)&0x3)
|
|
#define LPTFLAGS(s) ((s)&0x3f)
|
|
|
|
struct lpt_softc {
|
|
short sc_port;
|
|
short sc_state;
|
|
/* default case: negative prime, negative ack, handshake strobe,
|
|
prime once */
|
|
u_char sc_control;
|
|
char sc_flags;
|
|
#define LP_POS_INIT 0x01 /* if we are a postive init signal */
|
|
#define LP_POS_ACK 0x02 /* if we are a positive going ack */
|
|
#define LP_NO_PRIME 0x04 /* don't prime the printer at all */
|
|
#define LP_PRIMEOPEN 0x08 /* prime on every open */
|
|
#define LP_AUTOLF 0x10 /* tell printer to do an automatic lf */
|
|
#define LP_BYPASS 0x20 /* bypass printer ready checks */
|
|
struct buf *sc_inbuf;
|
|
short sc_xfercnt ;
|
|
char sc_primed;
|
|
char *sc_cp ;
|
|
} lpt_sc[NLPT] ;
|
|
|
|
/* bits for state */
|
|
#define OPEN (1<<0) /* device is open */
|
|
#define ASLP (1<<1) /* awaiting draining of printer */
|
|
#define ERROR (1<<2) /* error was received from printer */
|
|
#define OBUSY (1<<3) /* printer is busy doing output */
|
|
#define LPTOUT (1<<4) /* timeout while not selected */
|
|
#define TOUT (1<<5) /* timeout while not selected */
|
|
#define INIT (1<<6) /* waiting to initialize for open */
|
|
|
|
/*
|
|
* Internal routine to lptprobe to do port tests of one byte value
|
|
*/
|
|
int
|
|
lpt_port_test(short port, u_char data, u_char mask)
|
|
{
|
|
int temp, timeout;
|
|
|
|
data = data & mask;
|
|
outb(port, data);
|
|
timeout = 100;
|
|
do
|
|
temp = inb(port) & mask;
|
|
while (temp != data && --timeout);
|
|
lprintf("Port 0x%x\tout=%x\tin=%x\n", port, data, temp);
|
|
return (temp == data);
|
|
}
|
|
|
|
/*
|
|
* New lptprobe routine written by Rodney W. Grimes, 3/25/1993
|
|
*
|
|
* Logic:
|
|
* 1) You should be able to write to and read back the same value
|
|
* to the data port. Do an alternating zeros, alternating ones,
|
|
* walking zero, and walking one test to check for stuck bits.
|
|
*
|
|
* 2) You should be able to write to and read back the same value
|
|
* to the control port lower 5 bits, the upper 3 bits are reserved
|
|
* per the IBM PC technical reference manauls and different boards
|
|
* do different things with them. Do an alternating zeros, alternating
|
|
* ones, walking zero, and walking one test to check for stuck bits.
|
|
*
|
|
* Some printers drag the strobe line down when the are powered off
|
|
* so this bit has been masked out of the control port test.
|
|
*
|
|
* XXX Some printers may not like a fast pulse on init or strobe, I
|
|
* don't know at this point, if that becomes a problem these bits
|
|
* should be turned off in the mask byte for the control port test.
|
|
*
|
|
* 3) Set the data and control ports to a value of 0
|
|
*/
|
|
|
|
int
|
|
lptprobe(struct isa_device *dvp)
|
|
{
|
|
int status;
|
|
short port;
|
|
u_char data;
|
|
u_char mask;
|
|
int i;
|
|
|
|
status = IO_LPTSIZE;
|
|
|
|
port = dvp->id_iobase + lpt_data;
|
|
mask = 0xff;
|
|
while (mask != 0)
|
|
{
|
|
data = 0x55; /* Alternating zeros */
|
|
if (!lpt_port_test(port, data, mask)) status = 0;
|
|
|
|
data = 0xaa; /* Alternating ones */
|
|
if (!lpt_port_test(port, data, mask)) status = 0;
|
|
|
|
for (i = 0; i < 8; i++) /* Walking zero */
|
|
{
|
|
data = ~(1 << i);
|
|
if (!lpt_port_test(port, data, mask)) status = 0;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) /* Walking one */
|
|
{
|
|
data = (1 << i);
|
|
if (!lpt_port_test(port, data, mask)) status = 0;
|
|
}
|
|
|
|
if (port == dvp->id_iobase + lpt_data)
|
|
{
|
|
port = dvp->id_iobase + lpt_control;
|
|
mask = 0x1e;
|
|
}
|
|
else
|
|
mask = 0;
|
|
}
|
|
outb(dvp->id_iobase+lpt_data, 0);
|
|
outb(dvp->id_iobase+lpt_control, 0);
|
|
return (status);
|
|
}
|
|
|
|
lptattach(isdp)
|
|
struct isa_device *isdp;
|
|
{
|
|
struct lpt_softc *sc;
|
|
|
|
sc = lpt_sc + isdp->id_unit;
|
|
sc->sc_port = isdp->id_iobase;
|
|
sc->sc_state = 0;
|
|
outb(sc->sc_port+lpt_control, LPC_NINIT);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* lptopen -- reset the printer, then wait until it's selected and not busy.
|
|
*/
|
|
|
|
lptopen(dev, flag)
|
|
dev_t dev;
|
|
int flag;
|
|
{
|
|
struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev));
|
|
int s;
|
|
int trys, port;
|
|
|
|
if (sc->sc_state) {
|
|
lprintf("lp: still open %x\n", sc->sc_state);
|
|
return(EBUSY);
|
|
} else sc->sc_state |= INIT;
|
|
|
|
s = spltty();
|
|
sc->sc_flags = LPTFLAGS(minor(dev));
|
|
lprintf("lp flags 0x%x\n", sc->sc_flags);
|
|
port = sc->sc_port;
|
|
|
|
/* init printer */
|
|
if((sc->sc_flags & LP_NO_PRIME) == 0) {
|
|
if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) {
|
|
outb(port+lpt_control, 0);
|
|
sc->sc_primed++;
|
|
DELAY(500);
|
|
}
|
|
}
|
|
outb(port+lpt_control, LPC_SEL|LPC_NINIT);
|
|
|
|
/* wait till ready (printer running diagnostics) */
|
|
trys = 0;
|
|
do {
|
|
/* ran out of waiting for the printer */
|
|
if (trys++ >= LPINITRDY*4) {
|
|
splx(s);
|
|
sc->sc_state = 0;
|
|
lprintf ("status %x\n", inb(port+lpt_status) );
|
|
return (EBUSY);
|
|
}
|
|
|
|
/* wait 1/4 second, give up if we get a signal */
|
|
if (tsleep((caddr_t)sc,
|
|
LPPRI|PCATCH, "lptinit", hz/4) != EWOULDBLOCK) {
|
|
sc->sc_state = 0;
|
|
splx(s);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/* is printer online and ready for output */
|
|
} while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
|
|
(LPS_SEL|LPS_NBSY|LPS_NERR));
|
|
|
|
if(sc->sc_flags&LP_AUTOLF) {
|
|
outb(port+lpt_control, LPC_SEL|LPC_NINIT|LPC_ENA|LPC_AUTOL);
|
|
sc->sc_control = LPC_SEL|LPC_NINIT|LPC_ENA|LPC_AUTOL;
|
|
} else {
|
|
outb(port+lpt_control, LPC_SEL|LPC_NINIT|LPC_ENA);
|
|
sc->sc_control = LPC_SEL|LPC_NINIT|LPC_ENA;
|
|
}
|
|
|
|
sc->sc_state = OPEN | TOUT;
|
|
sc->sc_inbuf = geteblk(BUFSIZE);
|
|
sc->sc_xfercnt = 0;
|
|
splx(s);
|
|
timeout((timeout_t)lptout, (caddr_t)sc, hz/2);
|
|
lprintf("opened.\n");
|
|
return(0);
|
|
}
|
|
|
|
lptout (sc)
|
|
struct lpt_softc *sc;
|
|
{ int pl;
|
|
|
|
lprintf ("T %x ", inb(sc->sc_port+lpt_status));
|
|
if (sc->sc_state&OPEN)
|
|
timeout((timeout_t)lptout, (caddr_t)sc, hz/2);
|
|
else sc->sc_state &= ~TOUT;
|
|
|
|
if (sc->sc_state & ERROR)
|
|
sc->sc_state &= ~ERROR;
|
|
|
|
/*
|
|
* Avoid possible hangs do to missed interrupts
|
|
*/
|
|
if (sc->sc_xfercnt) {
|
|
pl = spltty();
|
|
lptintr(sc - lpt_sc);
|
|
splx(pl);
|
|
} else {
|
|
sc->sc_state &= ~OBUSY;
|
|
wakeup((caddr_t)sc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* lptclose -- close the device, free the local line buffer.
|
|
*/
|
|
|
|
lptclose(dev, flag)
|
|
int flag;
|
|
{
|
|
struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev));
|
|
int port = sc->sc_port;
|
|
|
|
sc->sc_state &= ~OPEN;
|
|
while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
|
|
(LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt)
|
|
/* wait 1/4 second, give up if we get a signal */
|
|
if (tsleep((caddr_t)sc,
|
|
LPPRI|PCATCH, "lpclose", hz) != EWOULDBLOCK)
|
|
break;
|
|
|
|
sc->sc_state = 0;
|
|
sc->sc_xfercnt = 0;
|
|
outb(sc->sc_port+lpt_control, LPC_NINIT);
|
|
brelse(sc->sc_inbuf);
|
|
lprintf("closed.\n");
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* lptwrite --copy a line from user space to a local buffer, then call
|
|
* putc to get the chars moved to the output queue.
|
|
*/
|
|
|
|
lptwrite(dev, uio)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
{
|
|
register unsigned n;
|
|
int pl, err;
|
|
struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev));
|
|
|
|
while (n = MIN(BUFSIZE, uio->uio_resid)) {
|
|
sc->sc_cp = sc->sc_inbuf->b_un.b_addr ;
|
|
uiomove(sc->sc_cp, n, uio);
|
|
sc->sc_xfercnt = n ;
|
|
while (sc->sc_xfercnt > 0) {
|
|
/* if the printer is ready for a char, give it one */
|
|
if ((sc->sc_state & OBUSY) == 0){
|
|
lprintf("\nC %d. ", sc->sc_xfercnt);
|
|
pl = spltty();
|
|
lptintr(sc - lpt_sc);
|
|
(void) splx(pl);
|
|
}
|
|
lprintf("W ");
|
|
if (err = tsleep((caddr_t)sc,
|
|
LPPRI|PCATCH, "lpwrite", 0))
|
|
return(err);
|
|
}
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* lptintr -- handle printer interrupts which occur when the printer is
|
|
* ready to accept another char.
|
|
*/
|
|
|
|
lptintr(unit)
|
|
{
|
|
struct lpt_softc *sc = lpt_sc + unit;
|
|
int port = sc->sc_port,sts;
|
|
|
|
sts = inb(port+lpt_status);
|
|
|
|
if (!sc->sc_state) {
|
|
printf ("lpt%d: stray interrupt sts=0x%02x\n", unit, sts);
|
|
return;
|
|
}
|
|
|
|
/* is printer online and ready for output */
|
|
if ((sts & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR/*|LPS_NACK*/)) ==
|
|
(LPS_SEL|LPS_NBSY|LPS_NERR)) {
|
|
/* is this a false interrupt ? */
|
|
if ((sc->sc_state & OBUSY)
|
|
&& (sts & LPS_NACK) == 0) return;
|
|
sc->sc_state |= OBUSY; sc->sc_state &= ~ERROR;
|
|
|
|
if (sc->sc_xfercnt) {
|
|
/* send char */
|
|
/*lprintf("%x ", *sc->sc_cp); */
|
|
outb(port+lpt_data, *sc->sc_cp++) ; sc->sc_xfercnt-- ;
|
|
outb(port+lpt_control, sc->sc_control|LPC_STB);
|
|
/* DELAY(X) */
|
|
outb(port+lpt_control, sc->sc_control);
|
|
}
|
|
|
|
/* any more bytes for the printer? */
|
|
if (sc->sc_xfercnt > 0) return;
|
|
|
|
/* none, wake up the top half to get more */
|
|
sc->sc_state &= ~OBUSY;
|
|
wakeup((caddr_t)sc);
|
|
lprintf("w ");
|
|
return;
|
|
} else sc->sc_state |= ERROR;
|
|
lprintf("sts %x ", sts);
|
|
}
|
|
|
|
int
|
|
lptioctl(dev_t dev, int cmd, caddr_t data, int flag)
|
|
{
|
|
int error;
|
|
|
|
error = 0;
|
|
switch (cmd) {
|
|
#ifdef THISISASAMPLE
|
|
case XXX:
|
|
dothis; andthis; andthat;
|
|
error=x;
|
|
break;
|
|
#endif /* THISISASAMPLE */
|
|
default:
|
|
error = ENODEV;
|
|
}
|
|
|
|
return(error);
|
|
}
|
|
|
|
#endif /* NLPT */
|