1/*
2 * Copyright (c) 1990 William F. Jolitz, TeleMuse
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This software is a component of "386BSD" developed by
16 * William F. Jolitz, TeleMuse.
17 * 4. Neither the name of the developer nor the name "386BSD"
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
22 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
23 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
24 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
25 * NOT MAKE USE OF THIS WORK.
26 *
27 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
28 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
29 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
30 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
31 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
32 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
33 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
34 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
39 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 *
48 * from: unknown origin, 386BSD 0.1
49 * $FreeBSD: head/sys/pc98/cbus/olpt.c 111815 2003-03-03 12:15:54Z phk $
50 */
51
52/*
53 * Device Driver for AT parallel printer port
54 * Written by William Jolitz 12/18/90
55 */
56
57/*
58 * Parallel port TCP/IP interfaces added. I looked at the driver from
59 * MACH but this is a complete rewrite, and btw. incompatible, and it
60 * should perform better too. I have never run the MACH driver though.
61 *
62 * This driver sends two bytes (0x08, 0x00) in front of each packet,
63 * to allow us to distinguish another format later.
64 *
65 * Now added a Linux/Crynwr compatibility mode which is enabled using
66 * IF_LINK0 - Tim Wilkinson.
67 *
68 * TODO:
69 * Make HDLC/PPP mode, use IF_LLC1 to enable.
70 *
71 * Connect the two computers using a Laplink parallel cable to use this
72 * feature:
73 *
74 * +----------------------------------------+
75 * |A-name A-End B-End Descr. Port/Bit |
76 * +----------------------------------------+
77 * |DATA0 2 15 Data 0/0x01 |
78 * |-ERROR 15 2 1/0x08 |
79 * +----------------------------------------+
80 * |DATA1 3 13 Data 0/0x02 |
81 * |+SLCT 13 3 1/0x10 |
82 * +----------------------------------------+
83 * |DATA2 4 12 Data 0/0x04 |
84 * |+PE 12 4 1/0x20 |
85 * +----------------------------------------+
86 * |DATA3 5 10 Strobe 0/0x08 |
87 * |-ACK 10 5 1/0x40 |
88 * +----------------------------------------+
89 * |DATA4 6 11 Data 0/0x10 |
90 * |BUSY 11 6 1/~0x80 |
91 * +----------------------------------------+
92 * |GND 18-25 18-25 GND - |
93 * +----------------------------------------+
94 *
95 * Expect transfer-rates up to 75 kbyte/sec.
96 *
97 * If GCC could correctly grok
98 * register int port asm("edx")
99 * the code would be cleaner
100 *
101 * Poul-Henning Kamp <phk@freebsd.org>
102 */
103
104#include <sys/param.h>
105#include <sys/systm.h>
106#include <sys/conf.h>
107#include <sys/bio.h>
108#include <sys/buf.h>
109#include <sys/bus.h>
110#include <sys/kernel.h>
111#include <sys/uio.h>
112#include <sys/syslog.h>
113
114#include <machine/clock.h>
115#include <machine/bus.h>
116#include <machine/resource.h>
117#include <sys/rman.h>
118
119#include <isa/isavar.h>
120
121#include <i386/isa/lptreg.h>
122#include <dev/ppbus/lptio.h>
123
124#define LPINITRDY 4 /* wait up to 4 seconds for a ready */
125#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */
126#define LPTOUTMAX 1 /* maximal timeout 1 s */
127#define LPPRI (PZERO+8)
128#define BUFSIZE 1024
129
130#ifndef PC98
131/* BIOS printer list - used by BIOS probe*/
132#define BIOS_LPT_PORTS 0x408
133#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS)
134#define BIOS_MAX_LPT 4
135#endif
136
137
138#ifndef DEBUG
139#define lprintf(args)
140#else
141#define lprintf(args) do { \
142 if (lptflag) \
143 printf args; \
144 } while (0)
145static int volatile lptflag = 1;
146#endif
147
148#define LPTUNIT(s) ((s)&0x03)
149#define LPTFLAGS(s) ((s)&0xfc)
150
151struct lpt_softc {
152 struct resource *res_port;
153 struct resource *res_irq;
154 void *sc_ih;
155
156 int sc_port;
157 short sc_state;
158 /* default case: negative prime, negative ack, handshake strobe,
159 prime once */
160 u_char sc_control;
161 char sc_flags;
162#define LP_POS_INIT 0x04 /* if we are a postive init signal */
163#define LP_POS_ACK 0x08 /* if we are a positive going ack */
164#define LP_NO_PRIME 0x10 /* don't prime the printer at all */
165#define LP_PRIMEOPEN 0x20 /* prime on every open */
166#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */
167#define LP_BYPASS 0x80 /* bypass printer ready checks */
168 struct buf *sc_inbuf;
169 short sc_xfercnt ;
170 char sc_primed;
171 char *sc_cp ;
172 u_char sc_irq ; /* IRQ status of port */
173#define LP_HAS_IRQ 0x01 /* we have an irq available */
174#define LP_USE_IRQ 0x02 /* we are using our irq */
175#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */
176 u_char sc_backoff ; /* time to call lptout() again */
177};
178
179/* bits for state */
180#define OPEN (1<<0) /* device is open */
181#define ASLP (1<<1) /* awaiting draining of printer */
182#define ERROR (1<<2) /* error was received from printer */
183#define OBUSY (1<<3) /* printer is busy doing output */
184#define LPTOUT (1<<4) /* timeout while not selected */
185#define TOUT (1<<5) /* timeout while not selected */
186#define INIT (1<<6) /* waiting to initialize for open */
187#define INTERRUPTED (1<<7) /* write call was interrupted */
188
189
190/* status masks to interrogate printer status */
191#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */
192#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR)
193
194/* Printer Ready condition - from lpa.c */
195/* Only used in polling code */
196#ifdef PC98
197#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY)
198#else /* IBM-PC */
199#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR)
200#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR)
201#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK)
202#endif
203
204#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */
205#define MAX_SPIN 20 /* Max delay for device ready in usecs */
206
207static timeout_t lptout;
208static int lpt_probe(device_t);
209static int lpt_attach(device_t);
210static void lpt_intr(void *);
211
212static devclass_t olpt_devclass;
213
214static device_method_t olpt_methods[] = {
215 DEVMETHOD(device_probe, lpt_probe),
216 DEVMETHOD(device_attach, lpt_attach),
217 { 0, 0 }
218};
219
220static driver_t olpt_driver = {
221 "olpt",
222 olpt_methods,
223 sizeof (struct lpt_softc),
224};
225
226DRIVER_MODULE(olpt, isa, olpt_driver, olpt_devclass, 0, 0);
227
228static d_open_t lptopen;
229static d_close_t lptclose;
230static d_write_t lptwrite;
231static d_ioctl_t lptioctl;
232
233#define CDEV_MAJOR 16
234static struct cdevsw lpt_cdevsw = {
235 .d_open = lptopen,
236 .d_close = lptclose,
237 .d_write = lptwrite,
238 .d_ioctl = lptioctl,
239 .d_name = "lpt",
240 .d_maj = CDEV_MAJOR,
241};
242
243static bus_addr_t lpt_iat[] = {0, 2, 4, 6};
244
245#ifndef PC98
246/*
247 * Internal routine to lptprobe to do port tests of one byte value
248 */
249static int
250lpt_port_test (int port, u_char data, u_char mask)
251{
252 int temp, timeout;
253
254 data = data & mask;
255 outb(port, data);
256 timeout = 10000;
257 do {
258 DELAY(10);
259 temp = inb(port) & mask;
260 }
261 while (temp != data && --timeout);
262 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n",
263 port, data, temp, timeout));
264 return (temp == data);
265}
266#endif /* PC98 */
267
268/*
269 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94
270 * Based partially on Rod Grimes' printer probe
271 *
272 * Logic:
273 * 1) If no port address was given, use the bios detected ports
274 * and autodetect what ports the printers are on.
275 * 2) Otherwise, probe the data port at the address given,
276 * using the method in Rod Grimes' port probe.
277 * (Much code ripped off directly from Rod's probe.)
278 *
279 * Comments from Rod's probe:
280 * Logic:
281 * 1) You should be able to write to and read back the same value
282 * to the data port. Do an alternating zeros, alternating ones,
283 * walking zero, and walking one test to check for stuck bits.
284 *
285 * 2) You should be able to write to and read back the same value
286 * to the control port lower 5 bits, the upper 3 bits are reserved
287 * per the IBM PC technical reference manauls and different boards
288 * do different things with them. Do an alternating zeros, alternating
289 * ones, walking zero, and walking one test to check for stuck bits.
290 *
291 * Some printers drag the strobe line down when the are powered off
292 * so this bit has been masked out of the control port test.
293 *
294 * XXX Some printers may not like a fast pulse on init or strobe, I
295 * don't know at this point, if that becomes a problem these bits
296 * should be turned off in the mask byte for the control port test.
297 *
298 * We are finally left with a mask of 0x14, due to some printers
299 * being adamant about holding other bits high ........
300 *
301 * Before probing the control port, we write a 0 to the data port -
302 * If not, some printers chuck out garbage when the strobe line
303 * gets toggled.
304 *
305 * 3) Set the data and control ports to a value of 0
306 *
307 * This probe routine has been tested on Epson Lx-800, HP LJ3P,
308 * Epson FX-1170 and C.Itoh 8510RM
309 * printers.
310 * Quick exit on fail added.
311 */
312
313int
314lpt_probe(device_t dev)
315{
316#ifdef PC98
317#define PC98_OLD_LPT 0x40
318#define PC98_IEEE_1284_FUNCTION 0x149
319 int rid;
320 struct resource *res;
321
322 /* Check isapnp ids */
323 if (isa_get_vendorid(dev))
324 return ENXIO;
325
326 rid = 0;
327 res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, lpt_iat, 4,
328 RF_ACTIVE);
329 if (res == NULL)
330 return ENXIO;
331 isa_load_resourcev(res, lpt_iat, 4);
332
333 if (isa_get_port(dev) == PC98_OLD_LPT) {
334 unsigned int pc98_ieee_mode, tmp;
335
336 tmp = inb(PC98_IEEE_1284_FUNCTION);
337 pc98_ieee_mode = tmp;
338 if ((tmp & 0x10) == 0x10) {
339 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10);
340 tmp = inb(PC98_IEEE_1284_FUNCTION);
341 if ((tmp & 0x10) != 0x10) {
342 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode);
343 bus_release_resource(dev, SYS_RES_IOPORT, rid,
344 res);
345 return ENXIO;
346 }
347 }
348 }
349
350 bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
351 return 0;
352#else
353 int port;
354 static short next_bios_lpt = 0;
355 int status;
356 static u_char testbyte[18] = {
357 0x55, /* alternating zeros */
358 0xaa, /* alternating ones */
359 0xfe, 0xfd, 0xfb, 0xf7,
360 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */
361 0x01, 0x02, 0x04, 0x08,
362 0x10, 0x20, 0x40, 0x80 /* walking one */
363 };
364 int i;
365
366 /*
367 * Make sure there is some way for lptopen to see that
368 * the port is not configured
369 * This 0 will remain if the port isn't attached
370 */
371 (lpt_sc + dvp->id_unit)->sc_port = 0;
372
373 status = IO_LPTSIZE;
374 /* If port not specified, use bios list */
375 if(dvp->id_iobase < 0) { /* port? */
376 if((next_bios_lpt < BIOS_MAX_LPT) &&
377 (*(BIOS_PORTS+next_bios_lpt) != 0) ) {
378 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++);
379 goto end_probe;
380 } else
381 return (0);
382 }
383
384 /* Port was explicitly specified */
385 /* This allows probing of ports unknown to the BIOS */
386 port = dvp->id_iobase + lpt_data;
387 for (i = 0; i < 18; i++) {
388 if (!lpt_port_test(port, testbyte[i], 0xff)) {
389 status = 0;
390 goto end_probe;
391 }
392 }
393
394end_probe:
395 /* write 0's to control and data ports */
396 outb(dvp->id_iobase+lpt_data, 0);
397 outb(dvp->id_iobase+lpt_control, 0);
398
399 return (status);
400#endif
401}
402
403/* XXX Todo - try and detect if interrupt is working */
404int
405lpt_attach(device_t dev)
406{
407 int rid, unit;
408 struct lpt_softc *sc;
409
410 unit = device_get_unit(dev);
411 sc = device_get_softc(dev);
412
413 rid = 0;
414 sc->res_port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
415 lpt_iat, 4, RF_ACTIVE);
416 if (sc->res_port == NULL)
417 return ENXIO;
418 isa_load_resourcev(sc->res_port, lpt_iat, 4);
419
420 sc->sc_port = rman_get_start(sc->res_port);
421 sc->sc_primed = 0; /* not primed yet */
422#ifdef PC98
423 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */
424 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */
425 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */
426 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */
427 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */
428#else
429 outb(sc->sc_port+lpt_control, LPC_NINIT);
430#endif
431
432 sc->sc_irq = 0;
433 if (isa_get_irq(dev) != -1) {
434 rid = 0;
435 sc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
436 0, ~0, 1, RF_ACTIVE);
437 if (sc->res_irq == NULL) {
438 bus_release_resource(dev, SYS_RES_IOPORT, 0,
439 sc->res_port);
440 return ENXIO;
441 }
442 if (bus_setup_intr(dev, sc->res_irq, INTR_TYPE_TTY, lpt_intr,
443 sc, &sc->sc_ih)) {
444 bus_release_resource(dev, SYS_RES_IOPORT, 0,
445 sc->res_port);
446 bus_release_resource(dev, SYS_RES_IRQ, 0,
447 sc->res_irq);
448 return ENXIO;
449 }
450 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ;
451 device_printf(dev, "Interrupt-driven port");
452 }
453
454 /* XXX what to do about the flags in the minor number? */
455 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit);
456 make_dev(&lpt_cdevsw, unit | LP_BYPASS,
457 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit);
458
459 return 0;
460}
461
462/*
463 * lptopen -- reset the printer, then wait until it's selected and not busy.
464 * If LP_BYPASS flag is selected, then we do not try to select the
465 * printer -- this is just used for passing ioctls.
466 */
467
468static int
469lptopen (dev_t dev, int flags, int fmt, struct thread *td)
470{
471 struct lpt_softc *sc;
472 int s;
473#ifdef PC98
474 int port;
475#else
476 int trys, port;
477#endif
478
479 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
480 if (sc->sc_port == 0)
481 return (ENXIO);
482
483 if (sc->sc_state) {
484 lprintf(("lp: still open %x\n", sc->sc_state));
485 return(EBUSY);
486 } else
487 sc->sc_state |= INIT;
488
489 sc->sc_flags = LPTFLAGS(minor(dev));
490
491 /* Check for open with BYPASS flag set. */
492 if (sc->sc_flags & LP_BYPASS) {
493 sc->sc_state = OPEN;
494 return(0);
495 }
496
497 s = spltty();
498 lprintf(("lp flags 0x%x\n", sc->sc_flags));
499 port = sc->sc_port;
500
501 /* set IRQ status according to ENABLE_IRQ flag */
502 if (sc->sc_irq & LP_ENABLE_IRQ)
503 sc->sc_irq |= LP_USE_IRQ;
504 else
505 sc->sc_irq &= ~LP_USE_IRQ;
506
507 /* init printer */
508#ifndef PC98
509 if ((sc->sc_flags & LP_NO_PRIME) == 0) {
510 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) {
511 outb(port+lpt_control, 0);
512 sc->sc_primed++;
513 DELAY(500);
514 }
515 }
516
517 outb (port+lpt_control, LPC_SEL|LPC_NINIT);
518
519 /* wait till ready (printer running diagnostics) */
520 trys = 0;
521 do {
522 /* ran out of waiting for the printer */
523 if (trys++ >= LPINITRDY*4) {
524 splx(s);
525 sc->sc_state = 0;
526 lprintf(("status %x\n", inb(port+lpt_status)));
527 return (EBUSY);
528 }
529
530 /* wait 1/4 second, give up if we get a signal */
531 if (tsleep (sc, LPPRI|PCATCH, "lptinit", hz/4) !=
532 EWOULDBLOCK) {
533 sc->sc_state = 0;
534 splx(s);
535 return (EBUSY);
536 }
537
538 /* is printer online and ready for output */
539 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
540 (LPS_SEL|LPS_NBSY|LPS_NERR));
541
542 sc->sc_control = LPC_SEL|LPC_NINIT;
543 if (sc->sc_flags & LP_AUTOLF)
544 sc->sc_control |= LPC_AUTOL;
545
546 /* enable interrupt if interrupt-driven */
547 if (sc->sc_irq & LP_USE_IRQ)
548 sc->sc_control |= LPC_ENA;
549
550 outb(port+lpt_control, sc->sc_control);
551#endif
552
553 sc->sc_state = OPEN;
554 sc->sc_inbuf = geteblk(BUFSIZE);
555 sc->sc_xfercnt = 0;
556 splx(s);
557
558 /* only use timeout if using interrupt */
559 lprintf(("irq %x\n", sc->sc_irq));
560 if (sc->sc_irq & LP_USE_IRQ) {
561 sc->sc_state |= TOUT;
562 timeout (lptout, (caddr_t)sc,
563 (sc->sc_backoff = hz/LPTOUTINITIAL));
564 }
565
566 lprintf(("opened.\n"));
567 return(0);
568}
569
570static void
571lptout (void *arg)
572{
573 struct lpt_softc *sc = arg;
574 int pl;
575
576 lprintf(("T %x ", inb(sc->sc_port+lpt_status)));
577 if (sc->sc_state & OPEN) {
578 sc->sc_backoff++;
579 if (sc->sc_backoff > hz/LPTOUTMAX)
580 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX;
581 timeout (lptout, (caddr_t)sc, sc->sc_backoff);
582 } else
583 sc->sc_state &= ~TOUT;
584
585 if (sc->sc_state & ERROR)
586 sc->sc_state &= ~ERROR;
587
588 /*
589 * Avoid possible hangs do to missed interrupts
590 */
591 if (sc->sc_xfercnt) {
592 pl = spltty();
593 lpt_intr(sc);
594 splx(pl);
595 } else {
596 sc->sc_state &= ~OBUSY;
597 wakeup(sc);
598 }
599}
600
601/*
602 * lptclose -- close the device, free the local line buffer.
603 *
604 * Check for interrupted write call added.
605 */
606
607static int
608lptclose(dev_t dev, int flags, int fmt, struct thread *td)
609{
610 struct lpt_softc *sc;
611#ifndef PC98
612 int port;
613#endif
614
615 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
616 if(sc->sc_flags & LP_BYPASS)
617 goto end_close;
618
619#ifndef PC98
620 port = sc->sc_port;
621#endif
622 sc->sc_state &= ~OPEN;
623
624#ifndef PC98
625 /* if the last write was interrupted, don't complete it */
626 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ))
627 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
628 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt)
629 /* wait 1/4 second, give up if we get a signal */
630 if (tsleep (sc, LPPRI|PCATCH,
631 "lpclose", hz) != EWOULDBLOCK)
632 break;
633
634 outb(sc->sc_port+lpt_control, LPC_NINIT);
635#endif
636 brelse(sc->sc_inbuf);
637
638end_close:
639 sc->sc_state = 0;
640 sc->sc_xfercnt = 0;
641 lprintf(("closed.\n"));
642 return(0);
643}
644
645/*
646 * pushbytes()
647 * Workhorse for actually spinning and writing bytes to printer
648 * Derived from lpa.c
649 * Originally by ?
650 *
651 * This code is only used when we are polling the port
652 */
653static int
654pushbytes(struct lpt_softc * sc)
655{
656 int spin, err, tic;
657 char ch;
658 int port = sc->sc_port;
659
660 lprintf(("p"));
661 /* loop for every character .. */
662 while (sc->sc_xfercnt > 0) {
663 /* printer data */
664 ch = *(sc->sc_cp);
665 sc->sc_cp++;
666 sc->sc_xfercnt--;
667
668 /*
669 * Wait for printer ready.
670 * Loop 20 usecs testing BUSY bit, then sleep
671 * for exponentially increasing timeout. (vak)
672 */
673 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin)
674 DELAY(1); /* XXX delay is NOT this accurate! */
675 if (spin >= MAX_SPIN) {
676 tic = 0;
677 while (NOT_READY(port+lpt_status)) {
678 /*
679 * Now sleep, every cycle a
680 * little longer ..
681 */
682 tic = tic + tic + 1;
683 /*
684 * But no more than 10 seconds. (vak)
685 */
686 if (tic > MAX_SLEEP)
687 tic = MAX_SLEEP;
688 err = tsleep(sc, LPPRI,
689 "lptpoll", tic);
690 if (err != EWOULDBLOCK) {
691 return (err);
692 }
693 }
694 }
695
696 /* output data */
697 outb(port+lpt_data, ch);
698#ifdef PC98
699 DELAY(1);
700 outb(port+lpt_control, LPC_PSTB);
701 DELAY(1);
702 outb(port+lpt_control, LPC_NPSTB);
703#else
704 /* strobe */
705 outb(port+lpt_control, sc->sc_control|LPC_STB);
706 outb(port+lpt_control, sc->sc_control);
707#endif
708
709 }
710 return(0);
711}
712
713/*
714 * lptwrite --copy a line from user space to a local buffer, then call
715 * putc to get the chars moved to the output queue.
716 *
717 * Flagging of interrupted write added.
718 */
719
720static int
721lptwrite(dev_t dev, struct uio * uio, int ioflag)
722{
723 register unsigned n;
724 int pl, err;
725 struct lpt_softc *sc;
726
727 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
728 if(sc->sc_flags & LP_BYPASS) {
729 /* we can't do writes in bypass mode */
730 return(EPERM);
731 }
732
733 sc->sc_state &= ~INTERRUPTED;
734 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) {
735 sc->sc_cp = sc->sc_inbuf->b_data ;
736 uiomove(sc->sc_cp, n, uio);
737 sc->sc_xfercnt = n ;
738 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) {
739 lprintf(("i"));
740 /* if the printer is ready for a char, */
741 /* give it one */
742 if ((sc->sc_state & OBUSY) == 0){
743 lprintf(("\nC %d. ", sc->sc_xfercnt));
744 pl = spltty();
745 lpt_intr(sc);
746 (void) splx(pl);
747 }
748 lprintf(("W "));
749 if (sc->sc_state & OBUSY)
750 if ((err = tsleep (sc,
751 LPPRI|PCATCH, "lpwrite", 0))) {
752 sc->sc_state |= INTERRUPTED;
753 return(err);
754 }
755 }
756 /* check to see if we must do a polled write */
757 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) {
758 lprintf(("p"));
759 if((err = pushbytes(sc)))
760 return(err);
761 }
762 }
763 return(0);
764}
765
766/*
767 * lptintr -- handle printer interrupts which occur when the printer is
768 * ready to accept another char.
769 *
770 * do checking for interrupted write call.
771 */
772
773static void
774lpt_intr(void *arg)
775{
776}
777
778static int
779lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
780{
781 int error = 0;
782 struct lpt_softc *sc;
783 u_int unit = LPTUNIT(minor(dev));
784 u_char old_sc_irq; /* old printer IRQ status */
785
786 sc = devclass_get_softc(olpt_devclass, unit);
787
788 switch (cmd) {
789 case LPT_IRQ :
790 if(sc->sc_irq & LP_HAS_IRQ) {
791 /*
792 * NOTE:
793 * If the IRQ status is changed,
794 * this will only be visible on the
795 * next open.
796 *
797 * If interrupt status changes,
798 * this gets syslog'd.
799 */
800 old_sc_irq = sc->sc_irq;
801 if(*(int*)data == 0)
802 sc->sc_irq &= (~LP_ENABLE_IRQ);
803 else
804 sc->sc_irq |= LP_ENABLE_IRQ;
805 if (old_sc_irq != sc->sc_irq )
806 log(LOG_NOTICE, "lpt%c switched to %s mode\n",
807 (char)unit+'0',
808 (sc->sc_irq & LP_ENABLE_IRQ)?
809 "interrupt-driven":"polled");
810 } else /* polled port */
811 error = EOPNOTSUPP;
812 break;
813 default:
814 error = ENODEV;
815 }
816
817 return(error);
818}
2 * Copyright (c) 1990 William F. Jolitz, TeleMuse
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This software is a component of "386BSD" developed by
16 * William F. Jolitz, TeleMuse.
17 * 4. Neither the name of the developer nor the name "386BSD"
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
22 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
23 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
24 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
25 * NOT MAKE USE OF THIS WORK.
26 *
27 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
28 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
29 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
30 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
31 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
32 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
33 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
34 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
39 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 *
48 * from: unknown origin, 386BSD 0.1
49 * $FreeBSD: head/sys/pc98/cbus/olpt.c 111815 2003-03-03 12:15:54Z phk $
50 */
51
52/*
53 * Device Driver for AT parallel printer port
54 * Written by William Jolitz 12/18/90
55 */
56
57/*
58 * Parallel port TCP/IP interfaces added. I looked at the driver from
59 * MACH but this is a complete rewrite, and btw. incompatible, and it
60 * should perform better too. I have never run the MACH driver though.
61 *
62 * This driver sends two bytes (0x08, 0x00) in front of each packet,
63 * to allow us to distinguish another format later.
64 *
65 * Now added a Linux/Crynwr compatibility mode which is enabled using
66 * IF_LINK0 - Tim Wilkinson.
67 *
68 * TODO:
69 * Make HDLC/PPP mode, use IF_LLC1 to enable.
70 *
71 * Connect the two computers using a Laplink parallel cable to use this
72 * feature:
73 *
74 * +----------------------------------------+
75 * |A-name A-End B-End Descr. Port/Bit |
76 * +----------------------------------------+
77 * |DATA0 2 15 Data 0/0x01 |
78 * |-ERROR 15 2 1/0x08 |
79 * +----------------------------------------+
80 * |DATA1 3 13 Data 0/0x02 |
81 * |+SLCT 13 3 1/0x10 |
82 * +----------------------------------------+
83 * |DATA2 4 12 Data 0/0x04 |
84 * |+PE 12 4 1/0x20 |
85 * +----------------------------------------+
86 * |DATA3 5 10 Strobe 0/0x08 |
87 * |-ACK 10 5 1/0x40 |
88 * +----------------------------------------+
89 * |DATA4 6 11 Data 0/0x10 |
90 * |BUSY 11 6 1/~0x80 |
91 * +----------------------------------------+
92 * |GND 18-25 18-25 GND - |
93 * +----------------------------------------+
94 *
95 * Expect transfer-rates up to 75 kbyte/sec.
96 *
97 * If GCC could correctly grok
98 * register int port asm("edx")
99 * the code would be cleaner
100 *
101 * Poul-Henning Kamp <phk@freebsd.org>
102 */
103
104#include <sys/param.h>
105#include <sys/systm.h>
106#include <sys/conf.h>
107#include <sys/bio.h>
108#include <sys/buf.h>
109#include <sys/bus.h>
110#include <sys/kernel.h>
111#include <sys/uio.h>
112#include <sys/syslog.h>
113
114#include <machine/clock.h>
115#include <machine/bus.h>
116#include <machine/resource.h>
117#include <sys/rman.h>
118
119#include <isa/isavar.h>
120
121#include <i386/isa/lptreg.h>
122#include <dev/ppbus/lptio.h>
123
124#define LPINITRDY 4 /* wait up to 4 seconds for a ready */
125#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */
126#define LPTOUTMAX 1 /* maximal timeout 1 s */
127#define LPPRI (PZERO+8)
128#define BUFSIZE 1024
129
130#ifndef PC98
131/* BIOS printer list - used by BIOS probe*/
132#define BIOS_LPT_PORTS 0x408
133#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS)
134#define BIOS_MAX_LPT 4
135#endif
136
137
138#ifndef DEBUG
139#define lprintf(args)
140#else
141#define lprintf(args) do { \
142 if (lptflag) \
143 printf args; \
144 } while (0)
145static int volatile lptflag = 1;
146#endif
147
148#define LPTUNIT(s) ((s)&0x03)
149#define LPTFLAGS(s) ((s)&0xfc)
150
151struct lpt_softc {
152 struct resource *res_port;
153 struct resource *res_irq;
154 void *sc_ih;
155
156 int sc_port;
157 short sc_state;
158 /* default case: negative prime, negative ack, handshake strobe,
159 prime once */
160 u_char sc_control;
161 char sc_flags;
162#define LP_POS_INIT 0x04 /* if we are a postive init signal */
163#define LP_POS_ACK 0x08 /* if we are a positive going ack */
164#define LP_NO_PRIME 0x10 /* don't prime the printer at all */
165#define LP_PRIMEOPEN 0x20 /* prime on every open */
166#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */
167#define LP_BYPASS 0x80 /* bypass printer ready checks */
168 struct buf *sc_inbuf;
169 short sc_xfercnt ;
170 char sc_primed;
171 char *sc_cp ;
172 u_char sc_irq ; /* IRQ status of port */
173#define LP_HAS_IRQ 0x01 /* we have an irq available */
174#define LP_USE_IRQ 0x02 /* we are using our irq */
175#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */
176 u_char sc_backoff ; /* time to call lptout() again */
177};
178
179/* bits for state */
180#define OPEN (1<<0) /* device is open */
181#define ASLP (1<<1) /* awaiting draining of printer */
182#define ERROR (1<<2) /* error was received from printer */
183#define OBUSY (1<<3) /* printer is busy doing output */
184#define LPTOUT (1<<4) /* timeout while not selected */
185#define TOUT (1<<5) /* timeout while not selected */
186#define INIT (1<<6) /* waiting to initialize for open */
187#define INTERRUPTED (1<<7) /* write call was interrupted */
188
189
190/* status masks to interrogate printer status */
191#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */
192#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR)
193
194/* Printer Ready condition - from lpa.c */
195/* Only used in polling code */
196#ifdef PC98
197#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY)
198#else /* IBM-PC */
199#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR)
200#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR)
201#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK)
202#endif
203
204#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */
205#define MAX_SPIN 20 /* Max delay for device ready in usecs */
206
207static timeout_t lptout;
208static int lpt_probe(device_t);
209static int lpt_attach(device_t);
210static void lpt_intr(void *);
211
212static devclass_t olpt_devclass;
213
214static device_method_t olpt_methods[] = {
215 DEVMETHOD(device_probe, lpt_probe),
216 DEVMETHOD(device_attach, lpt_attach),
217 { 0, 0 }
218};
219
220static driver_t olpt_driver = {
221 "olpt",
222 olpt_methods,
223 sizeof (struct lpt_softc),
224};
225
226DRIVER_MODULE(olpt, isa, olpt_driver, olpt_devclass, 0, 0);
227
228static d_open_t lptopen;
229static d_close_t lptclose;
230static d_write_t lptwrite;
231static d_ioctl_t lptioctl;
232
233#define CDEV_MAJOR 16
234static struct cdevsw lpt_cdevsw = {
235 .d_open = lptopen,
236 .d_close = lptclose,
237 .d_write = lptwrite,
238 .d_ioctl = lptioctl,
239 .d_name = "lpt",
240 .d_maj = CDEV_MAJOR,
241};
242
243static bus_addr_t lpt_iat[] = {0, 2, 4, 6};
244
245#ifndef PC98
246/*
247 * Internal routine to lptprobe to do port tests of one byte value
248 */
249static int
250lpt_port_test (int port, u_char data, u_char mask)
251{
252 int temp, timeout;
253
254 data = data & mask;
255 outb(port, data);
256 timeout = 10000;
257 do {
258 DELAY(10);
259 temp = inb(port) & mask;
260 }
261 while (temp != data && --timeout);
262 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n",
263 port, data, temp, timeout));
264 return (temp == data);
265}
266#endif /* PC98 */
267
268/*
269 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94
270 * Based partially on Rod Grimes' printer probe
271 *
272 * Logic:
273 * 1) If no port address was given, use the bios detected ports
274 * and autodetect what ports the printers are on.
275 * 2) Otherwise, probe the data port at the address given,
276 * using the method in Rod Grimes' port probe.
277 * (Much code ripped off directly from Rod's probe.)
278 *
279 * Comments from Rod's probe:
280 * Logic:
281 * 1) You should be able to write to and read back the same value
282 * to the data port. Do an alternating zeros, alternating ones,
283 * walking zero, and walking one test to check for stuck bits.
284 *
285 * 2) You should be able to write to and read back the same value
286 * to the control port lower 5 bits, the upper 3 bits are reserved
287 * per the IBM PC technical reference manauls and different boards
288 * do different things with them. Do an alternating zeros, alternating
289 * ones, walking zero, and walking one test to check for stuck bits.
290 *
291 * Some printers drag the strobe line down when the are powered off
292 * so this bit has been masked out of the control port test.
293 *
294 * XXX Some printers may not like a fast pulse on init or strobe, I
295 * don't know at this point, if that becomes a problem these bits
296 * should be turned off in the mask byte for the control port test.
297 *
298 * We are finally left with a mask of 0x14, due to some printers
299 * being adamant about holding other bits high ........
300 *
301 * Before probing the control port, we write a 0 to the data port -
302 * If not, some printers chuck out garbage when the strobe line
303 * gets toggled.
304 *
305 * 3) Set the data and control ports to a value of 0
306 *
307 * This probe routine has been tested on Epson Lx-800, HP LJ3P,
308 * Epson FX-1170 and C.Itoh 8510RM
309 * printers.
310 * Quick exit on fail added.
311 */
312
313int
314lpt_probe(device_t dev)
315{
316#ifdef PC98
317#define PC98_OLD_LPT 0x40
318#define PC98_IEEE_1284_FUNCTION 0x149
319 int rid;
320 struct resource *res;
321
322 /* Check isapnp ids */
323 if (isa_get_vendorid(dev))
324 return ENXIO;
325
326 rid = 0;
327 res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, lpt_iat, 4,
328 RF_ACTIVE);
329 if (res == NULL)
330 return ENXIO;
331 isa_load_resourcev(res, lpt_iat, 4);
332
333 if (isa_get_port(dev) == PC98_OLD_LPT) {
334 unsigned int pc98_ieee_mode, tmp;
335
336 tmp = inb(PC98_IEEE_1284_FUNCTION);
337 pc98_ieee_mode = tmp;
338 if ((tmp & 0x10) == 0x10) {
339 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10);
340 tmp = inb(PC98_IEEE_1284_FUNCTION);
341 if ((tmp & 0x10) != 0x10) {
342 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode);
343 bus_release_resource(dev, SYS_RES_IOPORT, rid,
344 res);
345 return ENXIO;
346 }
347 }
348 }
349
350 bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
351 return 0;
352#else
353 int port;
354 static short next_bios_lpt = 0;
355 int status;
356 static u_char testbyte[18] = {
357 0x55, /* alternating zeros */
358 0xaa, /* alternating ones */
359 0xfe, 0xfd, 0xfb, 0xf7,
360 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */
361 0x01, 0x02, 0x04, 0x08,
362 0x10, 0x20, 0x40, 0x80 /* walking one */
363 };
364 int i;
365
366 /*
367 * Make sure there is some way for lptopen to see that
368 * the port is not configured
369 * This 0 will remain if the port isn't attached
370 */
371 (lpt_sc + dvp->id_unit)->sc_port = 0;
372
373 status = IO_LPTSIZE;
374 /* If port not specified, use bios list */
375 if(dvp->id_iobase < 0) { /* port? */
376 if((next_bios_lpt < BIOS_MAX_LPT) &&
377 (*(BIOS_PORTS+next_bios_lpt) != 0) ) {
378 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++);
379 goto end_probe;
380 } else
381 return (0);
382 }
383
384 /* Port was explicitly specified */
385 /* This allows probing of ports unknown to the BIOS */
386 port = dvp->id_iobase + lpt_data;
387 for (i = 0; i < 18; i++) {
388 if (!lpt_port_test(port, testbyte[i], 0xff)) {
389 status = 0;
390 goto end_probe;
391 }
392 }
393
394end_probe:
395 /* write 0's to control and data ports */
396 outb(dvp->id_iobase+lpt_data, 0);
397 outb(dvp->id_iobase+lpt_control, 0);
398
399 return (status);
400#endif
401}
402
403/* XXX Todo - try and detect if interrupt is working */
404int
405lpt_attach(device_t dev)
406{
407 int rid, unit;
408 struct lpt_softc *sc;
409
410 unit = device_get_unit(dev);
411 sc = device_get_softc(dev);
412
413 rid = 0;
414 sc->res_port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
415 lpt_iat, 4, RF_ACTIVE);
416 if (sc->res_port == NULL)
417 return ENXIO;
418 isa_load_resourcev(sc->res_port, lpt_iat, 4);
419
420 sc->sc_port = rman_get_start(sc->res_port);
421 sc->sc_primed = 0; /* not primed yet */
422#ifdef PC98
423 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */
424 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */
425 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */
426 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */
427 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */
428#else
429 outb(sc->sc_port+lpt_control, LPC_NINIT);
430#endif
431
432 sc->sc_irq = 0;
433 if (isa_get_irq(dev) != -1) {
434 rid = 0;
435 sc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
436 0, ~0, 1, RF_ACTIVE);
437 if (sc->res_irq == NULL) {
438 bus_release_resource(dev, SYS_RES_IOPORT, 0,
439 sc->res_port);
440 return ENXIO;
441 }
442 if (bus_setup_intr(dev, sc->res_irq, INTR_TYPE_TTY, lpt_intr,
443 sc, &sc->sc_ih)) {
444 bus_release_resource(dev, SYS_RES_IOPORT, 0,
445 sc->res_port);
446 bus_release_resource(dev, SYS_RES_IRQ, 0,
447 sc->res_irq);
448 return ENXIO;
449 }
450 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ;
451 device_printf(dev, "Interrupt-driven port");
452 }
453
454 /* XXX what to do about the flags in the minor number? */
455 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit);
456 make_dev(&lpt_cdevsw, unit | LP_BYPASS,
457 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit);
458
459 return 0;
460}
461
462/*
463 * lptopen -- reset the printer, then wait until it's selected and not busy.
464 * If LP_BYPASS flag is selected, then we do not try to select the
465 * printer -- this is just used for passing ioctls.
466 */
467
468static int
469lptopen (dev_t dev, int flags, int fmt, struct thread *td)
470{
471 struct lpt_softc *sc;
472 int s;
473#ifdef PC98
474 int port;
475#else
476 int trys, port;
477#endif
478
479 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
480 if (sc->sc_port == 0)
481 return (ENXIO);
482
483 if (sc->sc_state) {
484 lprintf(("lp: still open %x\n", sc->sc_state));
485 return(EBUSY);
486 } else
487 sc->sc_state |= INIT;
488
489 sc->sc_flags = LPTFLAGS(minor(dev));
490
491 /* Check for open with BYPASS flag set. */
492 if (sc->sc_flags & LP_BYPASS) {
493 sc->sc_state = OPEN;
494 return(0);
495 }
496
497 s = spltty();
498 lprintf(("lp flags 0x%x\n", sc->sc_flags));
499 port = sc->sc_port;
500
501 /* set IRQ status according to ENABLE_IRQ flag */
502 if (sc->sc_irq & LP_ENABLE_IRQ)
503 sc->sc_irq |= LP_USE_IRQ;
504 else
505 sc->sc_irq &= ~LP_USE_IRQ;
506
507 /* init printer */
508#ifndef PC98
509 if ((sc->sc_flags & LP_NO_PRIME) == 0) {
510 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) {
511 outb(port+lpt_control, 0);
512 sc->sc_primed++;
513 DELAY(500);
514 }
515 }
516
517 outb (port+lpt_control, LPC_SEL|LPC_NINIT);
518
519 /* wait till ready (printer running diagnostics) */
520 trys = 0;
521 do {
522 /* ran out of waiting for the printer */
523 if (trys++ >= LPINITRDY*4) {
524 splx(s);
525 sc->sc_state = 0;
526 lprintf(("status %x\n", inb(port+lpt_status)));
527 return (EBUSY);
528 }
529
530 /* wait 1/4 second, give up if we get a signal */
531 if (tsleep (sc, LPPRI|PCATCH, "lptinit", hz/4) !=
532 EWOULDBLOCK) {
533 sc->sc_state = 0;
534 splx(s);
535 return (EBUSY);
536 }
537
538 /* is printer online and ready for output */
539 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
540 (LPS_SEL|LPS_NBSY|LPS_NERR));
541
542 sc->sc_control = LPC_SEL|LPC_NINIT;
543 if (sc->sc_flags & LP_AUTOLF)
544 sc->sc_control |= LPC_AUTOL;
545
546 /* enable interrupt if interrupt-driven */
547 if (sc->sc_irq & LP_USE_IRQ)
548 sc->sc_control |= LPC_ENA;
549
550 outb(port+lpt_control, sc->sc_control);
551#endif
552
553 sc->sc_state = OPEN;
554 sc->sc_inbuf = geteblk(BUFSIZE);
555 sc->sc_xfercnt = 0;
556 splx(s);
557
558 /* only use timeout if using interrupt */
559 lprintf(("irq %x\n", sc->sc_irq));
560 if (sc->sc_irq & LP_USE_IRQ) {
561 sc->sc_state |= TOUT;
562 timeout (lptout, (caddr_t)sc,
563 (sc->sc_backoff = hz/LPTOUTINITIAL));
564 }
565
566 lprintf(("opened.\n"));
567 return(0);
568}
569
570static void
571lptout (void *arg)
572{
573 struct lpt_softc *sc = arg;
574 int pl;
575
576 lprintf(("T %x ", inb(sc->sc_port+lpt_status)));
577 if (sc->sc_state & OPEN) {
578 sc->sc_backoff++;
579 if (sc->sc_backoff > hz/LPTOUTMAX)
580 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX;
581 timeout (lptout, (caddr_t)sc, sc->sc_backoff);
582 } else
583 sc->sc_state &= ~TOUT;
584
585 if (sc->sc_state & ERROR)
586 sc->sc_state &= ~ERROR;
587
588 /*
589 * Avoid possible hangs do to missed interrupts
590 */
591 if (sc->sc_xfercnt) {
592 pl = spltty();
593 lpt_intr(sc);
594 splx(pl);
595 } else {
596 sc->sc_state &= ~OBUSY;
597 wakeup(sc);
598 }
599}
600
601/*
602 * lptclose -- close the device, free the local line buffer.
603 *
604 * Check for interrupted write call added.
605 */
606
607static int
608lptclose(dev_t dev, int flags, int fmt, struct thread *td)
609{
610 struct lpt_softc *sc;
611#ifndef PC98
612 int port;
613#endif
614
615 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
616 if(sc->sc_flags & LP_BYPASS)
617 goto end_close;
618
619#ifndef PC98
620 port = sc->sc_port;
621#endif
622 sc->sc_state &= ~OPEN;
623
624#ifndef PC98
625 /* if the last write was interrupted, don't complete it */
626 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ))
627 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) !=
628 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt)
629 /* wait 1/4 second, give up if we get a signal */
630 if (tsleep (sc, LPPRI|PCATCH,
631 "lpclose", hz) != EWOULDBLOCK)
632 break;
633
634 outb(sc->sc_port+lpt_control, LPC_NINIT);
635#endif
636 brelse(sc->sc_inbuf);
637
638end_close:
639 sc->sc_state = 0;
640 sc->sc_xfercnt = 0;
641 lprintf(("closed.\n"));
642 return(0);
643}
644
645/*
646 * pushbytes()
647 * Workhorse for actually spinning and writing bytes to printer
648 * Derived from lpa.c
649 * Originally by ?
650 *
651 * This code is only used when we are polling the port
652 */
653static int
654pushbytes(struct lpt_softc * sc)
655{
656 int spin, err, tic;
657 char ch;
658 int port = sc->sc_port;
659
660 lprintf(("p"));
661 /* loop for every character .. */
662 while (sc->sc_xfercnt > 0) {
663 /* printer data */
664 ch = *(sc->sc_cp);
665 sc->sc_cp++;
666 sc->sc_xfercnt--;
667
668 /*
669 * Wait for printer ready.
670 * Loop 20 usecs testing BUSY bit, then sleep
671 * for exponentially increasing timeout. (vak)
672 */
673 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin)
674 DELAY(1); /* XXX delay is NOT this accurate! */
675 if (spin >= MAX_SPIN) {
676 tic = 0;
677 while (NOT_READY(port+lpt_status)) {
678 /*
679 * Now sleep, every cycle a
680 * little longer ..
681 */
682 tic = tic + tic + 1;
683 /*
684 * But no more than 10 seconds. (vak)
685 */
686 if (tic > MAX_SLEEP)
687 tic = MAX_SLEEP;
688 err = tsleep(sc, LPPRI,
689 "lptpoll", tic);
690 if (err != EWOULDBLOCK) {
691 return (err);
692 }
693 }
694 }
695
696 /* output data */
697 outb(port+lpt_data, ch);
698#ifdef PC98
699 DELAY(1);
700 outb(port+lpt_control, LPC_PSTB);
701 DELAY(1);
702 outb(port+lpt_control, LPC_NPSTB);
703#else
704 /* strobe */
705 outb(port+lpt_control, sc->sc_control|LPC_STB);
706 outb(port+lpt_control, sc->sc_control);
707#endif
708
709 }
710 return(0);
711}
712
713/*
714 * lptwrite --copy a line from user space to a local buffer, then call
715 * putc to get the chars moved to the output queue.
716 *
717 * Flagging of interrupted write added.
718 */
719
720static int
721lptwrite(dev_t dev, struct uio * uio, int ioflag)
722{
723 register unsigned n;
724 int pl, err;
725 struct lpt_softc *sc;
726
727 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev)));
728 if(sc->sc_flags & LP_BYPASS) {
729 /* we can't do writes in bypass mode */
730 return(EPERM);
731 }
732
733 sc->sc_state &= ~INTERRUPTED;
734 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) {
735 sc->sc_cp = sc->sc_inbuf->b_data ;
736 uiomove(sc->sc_cp, n, uio);
737 sc->sc_xfercnt = n ;
738 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) {
739 lprintf(("i"));
740 /* if the printer is ready for a char, */
741 /* give it one */
742 if ((sc->sc_state & OBUSY) == 0){
743 lprintf(("\nC %d. ", sc->sc_xfercnt));
744 pl = spltty();
745 lpt_intr(sc);
746 (void) splx(pl);
747 }
748 lprintf(("W "));
749 if (sc->sc_state & OBUSY)
750 if ((err = tsleep (sc,
751 LPPRI|PCATCH, "lpwrite", 0))) {
752 sc->sc_state |= INTERRUPTED;
753 return(err);
754 }
755 }
756 /* check to see if we must do a polled write */
757 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) {
758 lprintf(("p"));
759 if((err = pushbytes(sc)))
760 return(err);
761 }
762 }
763 return(0);
764}
765
766/*
767 * lptintr -- handle printer interrupts which occur when the printer is
768 * ready to accept another char.
769 *
770 * do checking for interrupted write call.
771 */
772
773static void
774lpt_intr(void *arg)
775{
776}
777
778static int
779lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
780{
781 int error = 0;
782 struct lpt_softc *sc;
783 u_int unit = LPTUNIT(minor(dev));
784 u_char old_sc_irq; /* old printer IRQ status */
785
786 sc = devclass_get_softc(olpt_devclass, unit);
787
788 switch (cmd) {
789 case LPT_IRQ :
790 if(sc->sc_irq & LP_HAS_IRQ) {
791 /*
792 * NOTE:
793 * If the IRQ status is changed,
794 * this will only be visible on the
795 * next open.
796 *
797 * If interrupt status changes,
798 * this gets syslog'd.
799 */
800 old_sc_irq = sc->sc_irq;
801 if(*(int*)data == 0)
802 sc->sc_irq &= (~LP_ENABLE_IRQ);
803 else
804 sc->sc_irq |= LP_ENABLE_IRQ;
805 if (old_sc_irq != sc->sc_irq )
806 log(LOG_NOTICE, "lpt%c switched to %s mode\n",
807 (char)unit+'0',
808 (sc->sc_irq & LP_ENABLE_IRQ)?
809 "interrupt-driven":"polled");
810 } else /* polled port */
811 error = EOPNOTSUPP;
812 break;
813 default:
814 error = ENODEV;
815 }
816
817 return(error);
818}