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https://github.com/freebsd/freebsd-src
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Changes to lpt driver:
- ansi prototypes in lpt.c
- a bit of tidying in lpt.c
- ioctl in lpt.c for switching between polling and using interrupts
- added lpt.h - needed for ioctl to allow switching between polling
and interrupt-driven modes.
This commit is contained in:
Geoff Rehmet
parent
a4723e41a9
commit
ee5ae27f05
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=1339
24
sys/dev/ppbus/lptio.h
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24
sys/dev/ppbus/lptio.h
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@ -0,0 +1,24 @@
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/*
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* Copyright (C) 1994 Geoffrey M. Rehmet
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*
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* This program is free software; you may redistribute it and/or
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* modify it, provided that it retain the above copyright notice
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* and the following disclaimer.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Geoff Rehmet, Rhodes University, South Africa <csgr@cs.ru.ac.za>
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*
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*/
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#ifndef _LPT_PRINTER_H_
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#define _LPT_PRINTER_H_
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#define LPT_IRQ _IOW('p', 1, long) /* set interrupt status */
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#endif
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24
sys/i386/include/lpt.h
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24
sys/i386/include/lpt.h
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@ -0,0 +1,24 @@
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/*
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* Copyright (C) 1994 Geoffrey M. Rehmet
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*
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* This program is free software; you may redistribute it and/or
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* modify it, provided that it retain the above copyright notice
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* and the following disclaimer.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Geoff Rehmet, Rhodes University, South Africa <csgr@cs.ru.ac.za>
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*
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*/
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#ifndef _LPT_PRINTER_H_
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#define _LPT_PRINTER_H_
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#define LPT_IRQ _IOW('p', 1, long) /* set interrupt status */
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#endif
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@ -46,7 +46,7 @@
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* SUCH DAMAGE.
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*
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* from: unknown origin, 386BSD 0.1
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* $Id: lpt.c,v 1.8 1994/02/17 10:20:18 rgrimes Exp $
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* $Id: lpt.c,v 1.9 1994/02/22 09:05:13 rgrimes Exp $
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*/
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/*
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@ -66,11 +66,14 @@
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#include "ioctl.h"
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#include "tty.h"
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#include "uio.h"
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#include "syslog.h"
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#include "i386/isa/isa.h"
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#include "i386/isa/isa_device.h"
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#include "i386/isa/lptreg.h"
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#include "i386/include/lpt.h"
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#define LPINITRDY 4 /* wait up to 4 seconds for a ready */
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#define LPTOUTTIME 4 /* wait up to 4 seconds for a ready */
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#define LPPRI (PZERO+8)
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@ -90,15 +93,6 @@
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int lptflag = 1;
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#endif
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void lptout();
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int lptprobe(), lptattach();
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void lptintr();
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struct isa_driver lptdriver = {
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lptprobe, lptattach, "lpt"
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};
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#define LPTUNIT(s) ((s)&0x03)
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#define LPTFLAGS(s) ((s)&0xfc)
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@ -122,6 +116,8 @@ struct lpt_softc {
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u_char sc_irq ; /* IRQ status of port */
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#define LP_HAS_IRQ 0x01 /* we have an irq available */
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#define LP_USE_IRQ 0x02 /* we are using our irq */
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#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */
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} lpt_sc[NLPT] ;
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/* bits for state */
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@ -149,12 +145,21 @@ struct lpt_softc {
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#define MAX_SPIN 20 /* Max delay for device ready in usecs */
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static void lptout (struct lpt_softc * sc);
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int lptprobe (struct isa_device *dvp);
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int lptattach (struct isa_device *isdp);
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void lptintr (int unit);
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struct isa_driver lptdriver = {
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lptprobe, lptattach, "lpt"
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};
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/*
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* Internal routine to lptprobe to do port tests of one byte value
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*/
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int
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static int
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lpt_port_test(short port, u_char data, u_char mask)
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{
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int temp, timeout;
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@ -279,8 +284,7 @@ lptprobe(struct isa_device *dvp)
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/* XXX Todo - try and detect if interrupt is working */
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int
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lptattach(isdp)
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struct isa_device *isdp;
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lptattach(struct isa_device *isdp)
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{
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struct lpt_softc *sc;
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@ -292,7 +296,7 @@ lptattach(isdp)
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/* check if we can use interrupt */
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lprintf("oldirq %x\n", sc->sc_irq);
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if(isdp->id_irq) {
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sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ;
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sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ;
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printf("lpt%d: Interrupt-driven port\n", isdp->id_unit);
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} else {
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sc->sc_irq = 0;
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@ -308,9 +312,7 @@ lptattach(isdp)
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*/
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int
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lptopen(dev, flag)
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dev_t dev;
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int flag;
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lptopen(dev_t dev, int flag)
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{
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struct lpt_softc *sc;
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int s;
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@ -321,7 +323,6 @@ lptopen(dev, flag)
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if ((unit >= NLPT) || (sc->sc_port == 0))
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return (ENXIO);
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/* Only check open bit */
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if (sc->sc_state) {
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lprintf("lp: still open\n") ;
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lprintf("still open %x\n", sc->sc_state);
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@ -333,6 +334,13 @@ lptopen(dev, flag)
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lprintf("lp flags 0x%x\n", sc->sc_flags);
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port = sc->sc_port;
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/* set IRQ status according to ENABLE_IRQ flag */
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if(sc->sc_irq & LP_ENABLE_IRQ)
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sc->sc_irq |= LP_USE_IRQ;
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else
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sc->sc_irq &= ~LP_USE_IRQ;
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/* init printer */
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if((sc->sc_flags & LP_NO_PRIME) == 0) {
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if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) {
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@ -384,20 +392,19 @@ lptopen(dev, flag)
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lprintf("irq %x\n", sc->sc_irq);
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if(sc->sc_irq & LP_USE_IRQ) {
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sc->sc_state |= TOUT;
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timeout (lptout, (caddr_t)sc, hz/2);
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timeout ((timeout_func_t)lptout, (caddr_t)sc, hz/2);
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}
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lprintf("opened.\n");
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return(0);
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}
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void
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lptout (sc)
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struct lpt_softc *sc;
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static void
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lptout (struct lpt_softc * sc)
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{ int pl;
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lprintf ("T %x ", inb(sc->sc_port+lpt_status));
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if (sc->sc_state&OPEN)
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timeout (lptout, (caddr_t)sc, hz/2);
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timeout ((timeout_func_t)lptout, (caddr_t)sc, hz/2);
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else sc->sc_state &= ~TOUT;
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if (sc->sc_state & ERROR)
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@ -423,9 +430,7 @@ lptout (sc)
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*/
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int
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lptclose(dev, flag)
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dev_t dev;
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int flag;
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lptclose(dev_t dev, int flag)
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{
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struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev));
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int port = sc->sc_port;
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@ -458,13 +463,13 @@ lptclose(dev, flag)
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* This code is only used when we are polling the port
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*/
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static int
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pushbytes(sc)
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struct lpt_softc *sc;
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pushbytes(struct lpt_softc * sc)
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{
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int spin, err, tic;
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char ch;
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int port = sc->sc_port;
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lprintf("p");
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/* loop for every character .. */
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while (sc->sc_xfercnt > 0) {
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/* printer data */
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@ -518,9 +523,7 @@ pushbytes(sc)
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*/
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int
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lptwrite(dev, uio)
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dev_t dev;
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struct uio *uio;
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lptwrite(dev_t dev, struct uio * uio)
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{
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register unsigned n;
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int pl, err;
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@ -531,26 +534,26 @@ lptwrite(dev, uio)
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sc->sc_cp = sc->sc_inbuf->b_un.b_addr ;
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uiomove(sc->sc_cp, n, uio);
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sc->sc_xfercnt = n ;
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if(sc->sc_irq & LP_USE_IRQ)
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while (sc->sc_xfercnt > 0) {
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lprintf("i");
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/* if the printer is ready for a char, */
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/* give it one */
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if ((sc->sc_state & OBUSY) == 0){
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lprintf("\nC %d. ", sc->sc_xfercnt);
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pl = spltty();
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lptintr(sc - lpt_sc);
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(void) splx(pl);
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}
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lprintf("W ");
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if (sc->sc_state & OBUSY)
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if (err = tsleep ((caddr_t)sc,
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LPPRI|PCATCH, "lpwrite", 0)) {
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sc->sc_state |= INTERRUPTED;
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return(err);
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}
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while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) {
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lprintf("i");
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/* if the printer is ready for a char, */
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/* give it one */
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if ((sc->sc_state & OBUSY) == 0){
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lprintf("\nC %d. ", sc->sc_xfercnt);
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pl = spltty();
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lptintr(sc - lpt_sc);
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(void) splx(pl);
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}
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else { /* polled write */
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lprintf("W ");
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if (sc->sc_state & OBUSY)
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if (err = tsleep ((caddr_t)sc,
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LPPRI|PCATCH, "lpwrite", 0)) {
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sc->sc_state |= INTERRUPTED;
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return(err);
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}
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}
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/* check to see if we must do a polled write */
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if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) {
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lprintf("p");
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if((err = pushbytes(sc)))
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return(err);
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@ -567,8 +570,7 @@ lptwrite(dev, uio)
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*/
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void
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lptintr(unit)
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int unit;
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lptintr(int unit)
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{
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struct lpt_softc *sc = lpt_sc + unit;
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int port = sc->sc_port, sts;
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@ -607,22 +609,33 @@ lptintr(unit)
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}
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int
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lptioctl(dev, cmd, data, flag)
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dev_t dev;
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int cmd;
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caddr_t data;
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int flag;
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lptioctl(dev_t dev, int cmd, caddr_t data, int flag)
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{
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int error;
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int error = 0;
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struct lpt_softc *sc;
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u_int unit = LPTUNIT(minor(dev));
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sc = lpt_sc + unit;
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error = 0;
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switch (cmd) {
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#ifdef THISISASAMPLE
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case XXX:
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dothis; andthis; andthat;
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error=x;
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break;
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#endif /* THISISASAMPLE */
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case LPT_IRQ :
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if(sc->sc_irq & LP_HAS_IRQ) {
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/*
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* NOTE:
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* If the IRQ status is changed,
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* this will only be visible on the
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* next open.
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*/
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if(*(int*)data == 0)
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sc->sc_irq &= (~LP_ENABLE_IRQ);
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else
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sc->sc_irq |= LP_ENABLE_IRQ;
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log(LOG_NOTICE, "lpt%c switched to %s mode\n",
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(char)unit+'0', (sc->sc_irq & LP_ENABLE_IRQ)?
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"interrupt-driven":"polled");
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} else /* polled port */
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error = EOPNOTSUPP;
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break;
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default:
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error = ENODEV;
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}
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