[unix-history] / usr / src / sys / vax / uba / lp.c

/*	lp.c	4.19	81/07/09	*/

#include "lp.h"
#if NLP > 0
/*
 * LP-11 Line printer driver
 *
 * This driver has been modified to work on printers where
 * leaving IENABLE set would cause continuous interrupts.
 *
 * TODO:
 *	Test driver on multiple printers
 */

#include "../h/param.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/buf.h"
#include "../h/systm.h"
#include "../h/map.h"
#include "../h/pte.h"
#include "../h/ubavar.h"
#include "../h/ioctl.h"
#include "../h/tty.h"

#define	LPPRI	(PZERO+8)
#define	IENABLE	0100
#define	DONE	0200
#define	ERROR	0100000
#define	LPLWAT	650
#define	LPHWAT	800

#define MAXCOL	132
#define CAP	1

#define LPUNIT(dev) (minor(dev) >> 3)

struct lpdevice {
	short	lpsr;
	short	lpbuf;
};

struct lp_softc {
	struct	clist sc_outq;
	int	sc_state;
	int	sc_physcol;
	int	sc_logcol;
	int	sc_physline;
	char	sc_flags;
	int	sc_lpchar;
	struct	buf *sc_inbuf;
} lp_softc[NLP];

struct uba_device *lpinfo[NLP];

int lpprobe(), lpattach(), lptout();
u_short lpstd[] = { 0177514 };
struct uba_driver lpdriver =
	{ lpprobe, 0, lpattach, 0, lpstd, "lp", lpinfo };

/* bits for state */
#define	OPEN		1	/* device is open */
#define	TOUT		2	/* timeout is active */
#define	MOD		4	/* device state has been modified */
#define	ASLP		8	/* awaiting draining of printer */

extern	lbolt;
int	lptout();

lpattach(ui)
	struct uba_device *ui;
{
	register struct lp_softc *sc;

	sc = &lp_softc[ui->ui_unit];
	sc->sc_lpchar = -1;
}

lpprobe(reg)
	caddr_t reg;
{
	register int br, cvec;			/* value-result */
	register struct lpdevice *lpaddr = (struct lpdevice *)reg;
#ifdef lint
	br = 0; cvec = br; br = cvec;
#endif

	lpaddr->lpsr = IENABLE;
	DELAY(5);
	lpaddr->lpsr = 0;
}

/*ARGSUSED*/
lpopen(dev, flag)
	dev_t dev;
	int flag;
{
	register int unit;
	register struct lpdevice *lpaddr;
	register struct lp_softc *sc;
	register struct uba_device *ui;

	if ((unit = LPUNIT(dev)) >= NLP ||
	    (sc = &lp_softc[unit])->sc_state&OPEN ||
	    (ui = lpinfo[unit]) == 0 || ui->ui_alive == 0) {
		u.u_error = ENXIO;
		return;
	}
	lpaddr = (struct lpdevice *)ui->ui_addr;
	if (lpaddr->lpsr&ERROR) {
		u.u_error = EIO;
		return;
	}
	sc->sc_state |= OPEN;
	sc->sc_inbuf = geteblk();
	sc->sc_flags = minor(dev) & 07;
	(void) spl4();
	if ((sc->sc_state&TOUT) == 0) {
		sc->sc_state |= TOUT;
		timeout(lptout, (caddr_t)dev, 10*hz);
	}
	(void) spl0();
	lpcanon(dev, '\f');
}

/*ARGSUSED*/
lpclose(dev, flag)
	dev_t dev;
	int flag;
{
	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];

	lpcanon(dev, '\f');
	brelse(sc->sc_inbuf);
	sc->sc_state &= ~OPEN;
}

lpwrite(dev)
	dev_t dev;
{
	register unsigned n;
	register char *cp;
	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];

	while (n = min(BSIZE, u.u_count)) {
		cp = sc->sc_inbuf->b_un.b_addr;
		iomove(cp, n, B_WRITE);
		do
			lpcanon(dev, *cp++);
		while (--n);
	}
}

lpcanon(dev, c)
	dev_t dev;
	register int c;
{
	register int logcol, physcol;
	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];

	if (sc->sc_flags&CAP) {
		register c2;

		if (c>='a' && c<='z')
			c += 'A'-'a'; else
		switch (c) {

		case '{':
			c2 = '(';
			goto esc;

		case '}':
			c2 = ')';
			goto esc;

		case '`':
			c2 = '\'';
			goto esc;

		case '|':
			c2 = '!';
			goto esc;

		case '~':
			c2 = '^';

		esc:
			lpcanon(dev, c2);
			sc->sc_logcol--;
			c = '-';
		}
	}
	logcol = sc->sc_logcol;
	physcol = sc->sc_physcol;
	if (c == ' ')
		logcol++;
	else switch(c) {

	case '\t':
		logcol = (logcol+8) & ~7;
		break;

	case '\f':
		if (sc->sc_physline == 0 && physcol == 0)
			break;
		/* fall into ... */

	case '\n':
		lpoutput(dev, c);
		if (c == '\f')
			sc->sc_physline = 0;
		else
			sc->sc_physline++;
		physcol = 0;
		/* fall into ... */

	case '\r':
		logcol = 0;
		(void) spl4();
		lpintr(LPUNIT(dev));
		(void) spl0();
		break;

	case '\b':
		if (logcol > 0)
			logcol--;
		break;

	default:
		if (logcol < physcol) {
			lpoutput(dev, '\r');
			physcol = 0;
		}
		if (logcol < MAXCOL) {
			while (logcol > physcol) {
				lpoutput(dev, ' ');
				physcol++;
			}
			lpoutput(dev, c);
			physcol++;
		}
		logcol++;
	}
	if (logcol > 1000)	/* ignore long lines  */
		logcol = 1000;
	sc->sc_logcol = logcol;
	sc->sc_physcol = physcol;
}

lpoutput(dev, c)
	dev_t dev;
	int c;
{
	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];

	if (sc->sc_outq.c_cc >= LPHWAT) {
		(void) spl4();
		lpintr(LPUNIT(dev));				/* unchoke */
		while (sc->sc_outq.c_cc >= LPHWAT) {
			sc->sc_state |= ASLP;		/* must be ERROR */
			sleep((caddr_t)sc, LPPRI);
		}
		(void) spl0();
	}
	while (putc(c, &sc->sc_outq))
		sleep((caddr_t)&lbolt, LPPRI);
}

lpintr(lp11)
	int lp11;
{
	register int n;
	register struct lp_softc *sc = &lp_softc[lp11];
	register struct uba_device *ui = lpinfo[lp11];
	register struct lpdevice *lpaddr = (struct lpdevice *)ui->ui_addr;

	lpaddr->lpsr &= ~IENABLE;
	n = sc->sc_outq.c_cc;
	if (sc->sc_lpchar < 0)
		sc->sc_lpchar = getc(&sc->sc_outq);
	while ((lpaddr->lpsr&DONE) && sc->sc_lpchar >= 0) {
		lpaddr->lpbuf = sc->sc_lpchar;
		sc->sc_lpchar = getc(&sc->sc_outq);
	}
	sc->sc_state |= MOD;
	if (sc->sc_outq.c_cc > 0 && (lpaddr->lpsr&ERROR)==0)
		lpaddr->lpsr |= IENABLE;	/* ok and more to do later */
	if (n>LPLWAT && sc->sc_outq.c_cc<=LPLWAT && sc->sc_state&ASLP) {
		sc->sc_state &= ~ASLP;
		wakeup((caddr_t)sc);		/* top half should go on */
	}
}

lptout(dev)
	dev_t dev;
{
	register struct lp_softc *sc;
	register struct uba_device *ui;
	register struct lpdevice *lpaddr;

	sc = &lp_softc[LPUNIT(dev)];
	ui = lpinfo[LPUNIT(dev)];
	lpaddr = (struct lpdevice *) ui->ui_addr;
	if ((sc->sc_state&MOD) != 0) {
		sc->sc_state &= ~MOD;		/* something happened */
		timeout(lptout, (caddr_t)dev, 2*hz);	/* so don't sweat */
		return;
	}
	if ((sc->sc_state&OPEN) == 0) {
		sc->sc_state &= ~TOUT;		/* no longer open */
		lpaddr->lpsr = 0;
		return;
	}
	if (sc->sc_outq.c_cc && (lpaddr->lpsr&DONE) && (lpaddr->lpsr&ERROR)==0)
		lpintr(LPUNIT(dev));			/* ready to go */
	timeout(lptout, (caddr_t)dev, 10*hz);
}

lpreset(uban)
	int uban;
{
	register struct uba_device *ui;
	register struct lpdevice *lpaddr;
	register int unit;

	for (unit = 0; unit < NLP; unit++) {
		if ((ui = lpinfo[unit]) == 0 || ui->ui_ubanum != uban ||
		    ui->ui_alive == 0)
			continue;
		printf(" lp%d", unit);
		lpaddr = (struct lpdevice *)ui->ui_addr;
		lpaddr->lpsr |= IENABLE;
	}
}
Commit	Line	Data
b620b354	1	/* lp.c 4.19 81/07/09 */
3f431cc4	2
66b4fb09	3	#include "lp.h"
ca063532	4	#if NLP > 0
3f431cc4 BJ	5	/*
	6	* LP-11 Line printer driver
	7	*
3f431cc4 BJ	8	* This driver has been modified to work on printers where
3f431cc4 BJ	9	* leaving IENABLE set would cause continuous interrupts.
683f0425 MT	10	*
683f0425 MT	11	* TODO:
683f0425	12	* Test driver on multiple printers
3f431cc4 BJ	13	*/
	14
	15	#include "../h/param.h"
	16	#include "../h/dir.h"
	17	#include "../h/user.h"
	18	#include "../h/buf.h"
	19	#include "../h/systm.h"
	20	#include "../h/map.h"
	21	#include "../h/pte.h"
ca063532	22	#include "../h/ubavar.h"
3f431cc4 BJ	23	#include "../h/ioctl.h"
3f431cc4 BJ	24	#include "../h/tty.h"
3f431cc4 BJ	25
	26	#define LPPRI (PZERO+8)
	27	#define IENABLE 0100
	28	#define DONE 0200
	29	#define ERROR 0100000
	30	#define LPLWAT 650
	31	#define LPHWAT 800
	32
ca063532 MT	33	#define MAXCOL 132
	34	#define CAP 1
	35
	36	#define LPUNIT(dev) (minor(dev) >> 3)
	37
	38	struct lpdevice {
3f431cc4 BJ	39	short lpsr;
	40	short lpbuf;
	41	};
	42
ca063532 MT	43	struct lp_softc {
	44	struct clist sc_outq;
	45	int sc_state;
	46	int sc_physcol;
	47	int sc_logcol;
	48	int sc_physline;
	49	char sc_flags;
	50	int sc_lpchar;
	51	struct buf *sc_inbuf;
	52	} lp_softc[NLP];
	53
	54	struct uba_device *lpinfo[NLP];
	55
	56	int lpprobe(), lpattach(), lptout();
	57	u_short lpstd[] = { 0177514 };
	58	struct uba_driver lpdriver =
	59	{ lpprobe, 0, lpattach, 0, lpstd, "lp", lpinfo };
3f431cc4 BJ	60
	61	/* bits for state */
	62	#define OPEN 1 /* device is open */
	63	#define TOUT 2 /* timeout is active */
	64	#define MOD 4 /* device state has been modified */
	65	#define ASLP 8 /* awaiting draining of printer */
	66
	67	extern lbolt;
	68	int lptout();
	69
5ffed226 BJ	70	lpattach(ui)
	71	struct uba_device *ui;
	72	{
	73	register struct lp_softc *sc;
	74
	75	sc = &lp_softc[ui->ui_unit];
	76	sc->sc_lpchar = -1;
	77	}
	78
	79	lpprobe(reg)
	80	caddr_t reg;
	81	{
c2213eb5	82	register int br, cvec; /* value-result */
5ffed226	83	register struct lpdevice lpaddr = (struct lpdevice )reg;
b620b354 BJ	84	#ifdef lint
	85	br = 0; cvec = br; br = cvec;
	86	#endif
5ffed226 BJ	87
5ffed226 BJ	88	lpaddr->lpsr = IENABLE;
c2213eb5	89	DELAY(5);
5ffed226 BJ	90	lpaddr->lpsr = 0;
	91	}
	92
3f431cc4 BJ	93	/ARGSUSED/
3f431cc4 BJ	94	lpopen(dev, flag)
5ffed226 BJ	95	dev_t dev;
5ffed226 BJ	96	int flag;
3f431cc4	97	{
ca063532 MT	98	register int unit;
	99	register struct lpdevice *lpaddr;
	100	register struct lp_softc *sc;
	101	register struct uba_device *ui;
	102
5ffed226 BJ	103	if ((unit = LPUNIT(dev)) >= NLP \|\|
	104	(sc = &lp_softc[unit])->sc_state&OPEN \|\|
	105	(ui = lpinfo[unit]) == 0 \|\| ui->ui_alive == 0) {
ca063532 MT	106	u.u_error = ENXIO;
	107	return;
	108	}
5ffed226 BJ	109	lpaddr = (struct lpdevice *)ui->ui_addr;
5ffed226 BJ	110	if (lpaddr->lpsr&ERROR) {
3f431cc4 BJ	111	u.u_error = EIO;
	112	return;
	113	}
ca063532 MT	114	sc->sc_state \|= OPEN;
	115	sc->sc_inbuf = geteblk();
	116	sc->sc_flags = minor(dev) & 07;
a0eab615	117	(void) spl4();
ca063532 MT	118	if ((sc->sc_state&TOUT) == 0) {
ca063532 MT	119	sc->sc_state \|= TOUT;
b620b354	120	timeout(lptout, (caddr_t)dev, 10*hz);
3f431cc4	121	}
a0eab615	122	(void) spl0();
5ffed226	123	lpcanon(dev, '\f');
3f431cc4 BJ	124	}
	125
	126	/ARGSUSED/
	127	lpclose(dev, flag)
5ffed226 BJ	128	dev_t dev;
5ffed226 BJ	129	int flag;
3f431cc4	130	{
5ffed226	131	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];
3f431cc4	132
5ffed226	133	lpcanon(dev, '\f');
ca063532 MT	134	brelse(sc->sc_inbuf);
ca063532 MT	135	sc->sc_state &= ~OPEN;
3f431cc4 BJ	136	}
3f431cc4 BJ	137
ca063532	138	lpwrite(dev)
5ffed226	139	dev_t dev;
3f431cc4	140	{
b620b354	141	register unsigned n;
3f431cc4	142	register char *cp;
5ffed226	143	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];
3f431cc4 BJ	144
3f431cc4 BJ	145	while (n = min(BSIZE, u.u_count)) {
ca063532	146	cp = sc->sc_inbuf->b_un.b_addr;
3f431cc4 BJ	147	iomove(cp, n, B_WRITE);
3f431cc4 BJ	148	do
5ffed226	149	lpcanon(dev, *cp++);
3f431cc4 BJ	150	while (--n);
	151	}
	152	}
	153
5ffed226 BJ	154	lpcanon(dev, c)
	155	dev_t dev;
	156	register int c;
3f431cc4 BJ	157	{
3f431cc4 BJ	158	register int logcol, physcol;
5ffed226	159	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];
3f431cc4	160
ca063532	161	if (sc->sc_flags&CAP) {
3f431cc4 BJ	162	register c2;
	163
	164	if (c>='a' && c<='z')
	165	c += 'A'-'a'; else
	166	switch (c) {
	167
	168	case '{':
	169	c2 = '(';
	170	goto esc;
	171
	172	case '}':
	173	c2 = ')';
	174	goto esc;
	175
	176	case '`':
	177	c2 = '\'';
	178	goto esc;
	179
	180	case '\|':
	181	c2 = '!';
	182	goto esc;
	183
	184	case '~':
	185	c2 = '^';
	186
	187	esc:
5ffed226	188	lpcanon(dev, c2);
ca063532	189	sc->sc_logcol--;
3f431cc4 BJ	190	c = '-';
	191	}
	192	}
ca063532 MT	193	logcol = sc->sc_logcol;
ca063532 MT	194	physcol = sc->sc_physcol;
3f431cc4 BJ	195	if (c == ' ')
	196	logcol++;
	197	else switch(c) {
	198
	199	case '\t':
36abf8b6	200	logcol = (logcol+8) & ~7;
3f431cc4 BJ	201	break;
3f431cc4 BJ	202
3f431cc4	203	case '\f':
ca063532	204	if (sc->sc_physline == 0 && physcol == 0)
ea588cf0	205	break;
fb5a911f MT	206	/* fall into ... */
	207
	208	case '\n':
5ffed226	209	lpoutput(dev, c);
ea588cf0	210	if (c == '\f')
ca063532	211	sc->sc_physline = 0;
ea588cf0	212	else
ca063532	213	sc->sc_physline++;
fb5a911f	214	physcol = 0;
3f431cc4 BJ	215	/* fall into ... */
	216
	217	case '\r':
ca063532	218	logcol = 0;
a0eab615	219	(void) spl4();
5ffed226	220	lpintr(LPUNIT(dev));
a0eab615	221	(void) spl0();
3f431cc4 BJ	222	break;
	223
	224	case '\b':
	225	if (logcol > 0)
	226	logcol--;
	227	break;
	228
	229	default:
	230	if (logcol < physcol) {
5ffed226	231	lpoutput(dev, '\r');
3f431cc4 BJ	232	physcol = 0;
3f431cc4 BJ	233	}
ca063532	234	if (logcol < MAXCOL) {
3f431cc4	235	while (logcol > physcol) {
5ffed226	236	lpoutput(dev, ' ');
3f431cc4 BJ	237	physcol++;
3f431cc4 BJ	238	}
5ffed226	239	lpoutput(dev, c);
3f431cc4 BJ	240	physcol++;
	241	}
	242	logcol++;
	243	}
	244	if (logcol > 1000) /* ignore long lines */
	245	logcol = 1000;
ca063532 MT	246	sc->sc_logcol = logcol;
ca063532 MT	247	sc->sc_physcol = physcol;
3f431cc4 BJ	248	}
3f431cc4 BJ	249
5ffed226 BJ	250	lpoutput(dev, c)
	251	dev_t dev;
	252	int c;
3f431cc4	253	{
5ffed226	254	register struct lp_softc *sc = &lp_softc[LPUNIT(dev)];
3f431cc4	255
ca063532	256	if (sc->sc_outq.c_cc >= LPHWAT) {
a0eab615	257	(void) spl4();
5ffed226	258	lpintr(LPUNIT(dev)); /* unchoke */
ca063532 MT	259	while (sc->sc_outq.c_cc >= LPHWAT) {
	260	sc->sc_state \|= ASLP; /* must be ERROR */
	261	sleep((caddr_t)sc, LPPRI);
3f431cc4	262	}
a0eab615	263	(void) spl0();
3f431cc4	264	}
ca063532	265	while (putc(c, &sc->sc_outq))
3f431cc4 BJ	266	sleep((caddr_t)&lbolt, LPPRI);
	267	}
	268
5ffed226 BJ	269	lpintr(lp11)
5ffed226 BJ	270	int lp11;
3f431cc4 BJ	271	{
3f431cc4 BJ	272	register int n;
5ffed226 BJ	273	register struct lp_softc *sc = &lp_softc[lp11];
	274	register struct uba_device *ui = lpinfo[lp11];
	275	register struct lpdevice lpaddr = (struct lpdevice )ui->ui_addr;
ca063532	276
ca063532 MT	277	lpaddr->lpsr &= ~IENABLE;
	278	n = sc->sc_outq.c_cc;
	279	if (sc->sc_lpchar < 0)
	280	sc->sc_lpchar = getc(&sc->sc_outq);
	281	while ((lpaddr->lpsr&DONE) && sc->sc_lpchar >= 0) {
	282	lpaddr->lpbuf = sc->sc_lpchar;
	283	sc->sc_lpchar = getc(&sc->sc_outq);
3f431cc4	284	}
ca063532 MT	285	sc->sc_state \|= MOD;
	286	if (sc->sc_outq.c_cc > 0 && (lpaddr->lpsr&ERROR)==0)
	287	lpaddr->lpsr \|= IENABLE; /* ok and more to do later */
	288	if (n>LPLWAT && sc->sc_outq.c_cc<=LPLWAT && sc->sc_state&ASLP) {
	289	sc->sc_state &= ~ASLP;
	290	wakeup((caddr_t)sc); /* top half should go on */
3f431cc4 BJ	291	}
	292	}
	293
ca063532	294	lptout(dev)
5ffed226	295	dev_t dev;
3f431cc4	296	{
ca063532 MT	297	register struct lp_softc *sc;
	298	register struct uba_device *ui;
	299	register struct lpdevice *lpaddr;
	300
	301	sc = &lp_softc[LPUNIT(dev)];
	302	ui = lpinfo[LPUNIT(dev)];
	303	lpaddr = (struct lpdevice *) ui->ui_addr;
	304	if ((sc->sc_state&MOD) != 0) {
	305	sc->sc_state &= ~MOD; /* something happened */
b620b354	306	timeout(lptout, (caddr_t)dev, 2hz); / so don't sweat */
3f431cc4 BJ	307	return;
3f431cc4 BJ	308	}
ca063532 MT	309	if ((sc->sc_state&OPEN) == 0) {
	310	sc->sc_state &= ~TOUT; /* no longer open */
	311	lpaddr->lpsr = 0;
3f431cc4 BJ	312	return;
3f431cc4 BJ	313	}
ca063532	314	if (sc->sc_outq.c_cc && (lpaddr->lpsr&DONE) && (lpaddr->lpsr&ERROR)==0)
5ffed226	315	lpintr(LPUNIT(dev)); /* ready to go */
b620b354	316	timeout(lptout, (caddr_t)dev, 10*hz);
3f431cc4 BJ	317	}
3f431cc4 BJ	318
ca063532	319	lpreset(uban)
5ffed226	320	int uban;
3f431cc4	321	{
ca063532 MT	322	register struct uba_device *ui;
	323	register struct lpdevice *lpaddr;
	324	register int unit;
	325
5ffed226 BJ	326	for (unit = 0; unit < NLP; unit++) {
	327	if ((ui = lpinfo[unit]) == 0 \|\| ui->ui_ubanum != uban \|\|
	328	ui->ui_alive == 0)
ca063532 MT	329	continue;
ca063532 MT	330	printf(" lp%d", unit);
5ffed226	331	lpaddr = (struct lpdevice *)ui->ui_addr;
ca063532	332	lpaddr->lpsr \|= IENABLE;
3f431cc4 BJ	333	}
3f431cc4 BJ	334	}