FreeBSD/Linux Kernel Cross Reference
sys/dev/ppbus/lpt.c
1 /* $NetBSD: lpt.c,v 1.12 2004/02/03 21:15:03 jdolecek Exp $ */
2
3 /*
4 * Copyright (c) 1990 William F. Jolitz, TeleMuse
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This software is a component of "386BSD" developed by
18 * William F. Jolitz, TeleMuse.
19 * 4. Neither the name of the developer nor the name "386BSD"
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
24 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
25 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
26 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
27 * NOT MAKE USE OF THIS WORK.
28 *
29 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
30 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
31 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
32 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
33 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
34 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
35 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
36 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
41 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 *
50 * from: unknown origin, 386BSD 0.1
51 * From Id: lpt.c,v 1.55.2.1 1996/11/12 09:08:38 phk Exp
52 * From Id: nlpt.c,v 1.14 1999/02/08 13:55:43 des Exp
53 * FreeBSD: src/sys/dev/ppbus/lpt.c,v 1.15.2.3 2000/07/07 00:30:40 obrien Exp
54 */
55
56 /*
57 * Device Driver for AT parallel printer port
58 * Written by William Jolitz 12/18/90
59 */
60
61 /*
62 * Updated for ppbus by Nicolas Souchu
63 * [Mon Jul 28 1997]
64 */
65
66 #include <sys/cdefs.h>
67 __KERNEL_RCSID(0, "$NetBSD: lpt.c,v 1.12 2004/02/03 21:15:03 jdolecek Exp $");
68
69 #include "opt_ppbus_lpt.h"
70
71 #include <sys/param.h>
72 #include <sys/systm.h>
73 #include <sys/conf.h>
74 #include <sys/kernel.h>
75 #include <sys/proc.h>
76 #include <sys/malloc.h>
77 #include <sys/file.h>
78 #include <sys/uio.h>
79 #include <sys/ioctl.h>
80 #include <sys/types.h>
81 #include <sys/syslog.h>
82
83 #include <machine/bus.h>
84
85 #include <dev/ppbus/ppbus_1284.h>
86 #include <dev/ppbus/ppbus_base.h>
87 #include <dev/ppbus/ppbus_io.h>
88 #include <dev/ppbus/ppbus_msq.h>
89 #include <dev/ppbus/ppbus_var.h>
90
91 #include <dev/ppbus/lptvar.h>
92 #include <dev/ppbus/lptreg.h>
93 #include <dev/ppbus/lptio.h>
94
95 /* Autoconf functions */
96 static int lpt_probe(struct device *, struct cfdata *, void *);
97 static void lpt_attach(struct device *, struct device *, void *);
98 static int lpt_detach(struct device *, int);
99
100 /* Autoconf structure */
101 CFATTACH_DECL(lpt_ppbus, sizeof(struct lpt_softc), lpt_probe, lpt_attach,
102 lpt_detach, NULL);
103
104 extern struct cfdriver lpt_cd;
105
106 dev_type_open(lptopen);
107 dev_type_close(lptclose);
108 dev_type_read(lptread);
109 dev_type_write(lptwrite);
110 dev_type_ioctl(lptioctl);
111
112 const struct cdevsw lpt_cdevsw = {
113 lptopen, lptclose, lptread, lptwrite, lptioctl,
114 nostop, notty, nopoll, nommap, nokqfilter
115 };
116
117
118 /* Function prototypes */
119 static int lpt_detect(struct device *);
120 static int lpt_request_ppbus(struct lpt_softc *, int);
121 static int lpt_release_ppbus(struct lpt_softc *, int);
122 static int lpt_logstatus(const struct device * const, const unsigned char);
123
124 /*
125 * lpt_probe()
126 */
127 static int
128 lpt_probe(struct device * parent, struct cfdata * match, void * aux)
129 {
130 /* Test ppbus's capability */
131 return lpt_detect(parent);
132 }
133
134 static void
135 lpt_attach(struct device * parent, struct device * self, void * aux)
136 {
137 struct lpt_softc * sc = (struct lpt_softc *) self;
138 struct ppbus_device_softc * ppbdev = &(sc->ppbus_dev);
139 struct ppbus_attach_args * args = aux;
140 char buf[64];
141 int error;
142
143 error = lpt_request_ppbus(sc, 0);
144 if(error) {
145 printf("%s(%s): error (%d) requesting bus(%s). Device not "
146 "properly attached.\n", __func__, self->dv_xname,
147 error, parent->dv_xname);
148 return;
149 }
150
151 /* Record capabilities */
152 ppbdev->capabilities = args->capabilities;
153
154 /* Allocate memory buffers */
155 if(ppbdev->capabilities & PPBUS_HAS_DMA) {
156 if(ppbus_dma_malloc(parent, &(sc->sc_inbuf),
157 &(sc->sc_in_baddr), BUFSIZE)) {
158
159 printf(" : cannot allocate input DMA buffer. Device "
160 "not properly attached!\n");
161 return;
162 }
163 if(ppbus_dma_malloc(parent, &(sc->sc_outbuf),
164 &(sc->sc_out_baddr), BUFSIZE)) {
165
166 ppbus_dma_free(parent, &(sc->sc_inbuf),
167 &(sc->sc_in_baddr), BUFSIZE);
168 printf(" : cannot allocate output DMA buffer. Device "
169 "not properly attached!\n");
170 return;
171 }
172 } else {
173 sc->sc_inbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK);
174 sc->sc_outbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK);
175 }
176
177 /* Print out mode */
178 ppbdev->ctx.mode = ppbus_get_mode(parent);
179 bitmask_snprintf(ppbdev->ctx.mode, "\2\1COMPATIBLE\2NIBBLE"
180 "\3PS2\4EPP\5ECP\6FAST_CENTR", buf, sizeof(buf));
181 printf(": port mode = %s\n", buf);
182
183 /* Initialize the device on open by default */
184 sc->sc_flags = LPT_PRIME;
185
186 lpt_release_ppbus(sc, 0);
187 }
188
189 static int
190 lpt_detach(struct device * self, int flags)
191 {
192 struct lpt_softc * lpt = (struct lpt_softc *) self;
193 struct ppbus_device_softc * ppbdev = (struct ppbus_device_softc *) lpt;
194 int err;
195
196 if(lpt->sc_state & HAVEBUS) {
197 err = lpt_release_ppbus(lpt, 0);
198 if(err) {
199 printf("%s error (%d) while releasing bus",
200 self->dv_xname, err);
201 if(flags & DETACH_FORCE) {
202 printf(", continuing (DETACH_FORCE)!\n");
203 }
204 else {
205 printf(", terminating!\n");
206 return 0;
207 }
208 }
209 lpt->sc_state &= ~HAVEBUS;
210 }
211
212 ppbdev->ctx.valid = 0;
213
214 /* Free memory buffers */
215 if(ppbdev->capabilities & PPBUS_HAS_DMA) {
216 ppbus_dma_free(self->dv_parent, &(lpt->sc_inbuf),
217 &(lpt->sc_in_baddr), BUFSIZE);
218 ppbus_dma_free(self->dv_parent, &(lpt->sc_outbuf),
219 &(lpt->sc_out_baddr), BUFSIZE);
220 } else {
221 free(lpt->sc_inbuf, M_DEVBUF);
222 free(lpt->sc_outbuf, M_DEVBUF);
223 }
224
225 if(!(flags & DETACH_QUIET)) {
226 printf("%s detached", self->dv_xname);
227 }
228
229 return 1;
230 }
231
232 /* Grab bus for lpt device */
233 static int
234 lpt_request_ppbus(struct lpt_softc * lpt, int how)
235 {
236 struct device * dev = (struct device *) lpt;
237 int error;
238
239 error = ppbus_request_bus(dev->dv_parent, dev, how, (hz));
240 if (!(error)) {
241 lpt->sc_state |= HAVEBUS;
242 }
243 else {
244 LPT_DPRINTF(("%s(%s): error %d requesting bus.\n", __func__,
245 dev->dv_xname, error));
246 }
247
248 return error;
249 }
250
251 /* Release ppbus to enable other devices to use it. */
252 static int
253 lpt_release_ppbus(struct lpt_softc * lpt, int how)
254 {
255 struct device * dev = (struct device *) lpt;
256 int error;
257
258 if(lpt->sc_state & HAVEBUS) {
259 error = ppbus_release_bus(dev->dv_parent, dev, how, (hz));
260 if(!(error))
261 lpt->sc_state &= ~HAVEBUS;
262 else
263 LPT_DPRINTF(("%s(%s): error releasing bus.\n", __func__,
264 dev->dv_xname));
265 }
266 else {
267 error = EINVAL;
268 LPT_DPRINTF(("%s(%s): device does not own bus.\n", __func__,
269 dev->dv_xname));
270 }
271
272 return error;
273 }
274
275
276 /*
277 * Probe simplified by replacing multiple loops with a hardcoded
278 * test pattern - 1999/02/08 des@freebsd.org
279 *
280 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94
281 * Based partially on Rod Grimes' printer probe
282 *
283 * Logic:
284 * 1) If no port address was given, use the bios detected ports
285 * and autodetect what ports the printers are on.
286 * 2) Otherwise, probe the data port at the address given,
287 * using the method in Rod Grimes' port probe.
288 * (Much code ripped off directly from Rod's probe.)
289 *
290 * Comments from Rod's probe:
291 * Logic:
292 * 1) You should be able to write to and read back the same value
293 * to the data port. Do an alternating zeros, alternating ones,
294 * walking zero, and walking one test to check for stuck bits.
295 *
296 * 2) You should be able to write to and read back the same value
297 * to the control port lower 5 bits, the upper 3 bits are reserved
298 * per the IBM PC technical reference manauls and different boards
299 * do different things with them. Do an alternating zeros, alternating
300 * ones, walking zero, and walking one test to check for stuck bits.
301 *
302 * Some printers drag the strobe line down when the are powered off
303 * so this bit has been masked out of the control port test.
304 *
305 * XXX Some printers may not like a fast pulse on init or strobe, I
306 * don't know at this point, if that becomes a problem these bits
307 * should be turned off in the mask byte for the control port test.
308 *
309 * We are finally left with a mask of 0x14, due to some printers
310 * being adamant about holding other bits high ........
311 *
312 * Before probing the control port, we write a 0 to the data port -
313 * If not, some printers chuck out garbage when the strobe line
314 * gets toggled.
315 *
316 * 3) Set the data and control ports to a value of 0
317 *
318 * This probe routine has been tested on Epson Lx-800, HP LJ3P,
319 * Epson FX-1170 and C.Itoh 8510RM
320 * printers.
321 * Quick exit on fail added.
322 */
323 static int
324 lpt_detect(struct device * dev)
325 {
326 static const u_char testbyte[18] = {
327 0x55, /* alternating zeros */
328 0xaa, /* alternating ones */
329 0xfe, 0xfd, 0xfb, 0xf7,
330 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */
331 0x01, 0x02, 0x04, 0x08,
332 0x10, 0x20, 0x40, 0x80 /* walking one */
333 };
334 int i, status;
335 u_char dtr, ctr, str, var;
336
337 /* Save register contents */
338 dtr = ppbus_rdtr(dev);
339 ctr = ppbus_rctr(dev);
340 str = ppbus_rstr(dev);
341
342 status = 1; /* assume success */
343
344 /* Test data port */
345 for(i = 0; i < 18; i++) {
346 ppbus_wdtr(dev, testbyte[i]);
347 if((var = ppbus_rdtr(dev)) != testbyte[i]) {
348 status = 0;
349 LPT_DPRINTF(("%s(%s): byte value %x cannot be written "
350 "and read from data port (got %x instead).\n",
351 __func__, dev->dv_xname, testbyte[i], var));
352 goto end;
353 }
354 }
355
356 /* Test control port */
357 ppbus_wdtr(dev, 0);
358 for(i = 0; i < 18; i++) {
359 ppbus_wctr(dev, (testbyte[i] & 0x14));
360 if(((var = ppbus_rctr(dev)) & 0x14) != (testbyte[i] & 0x14)) {
361 status = 0;
362 LPT_DPRINTF(("%s(%s): byte value %x (unmasked value "
363 "%x) cannot be written and read from control "
364 "port (got %x instead).\n", __func__,
365 dev->dv_xname, (testbyte[i] & 0x14),
366 testbyte[i], (var & 0x14)));
367 break;
368 }
369 }
370
371 end:
372 /* Restore contents of registers */
373 ppbus_wdtr(dev, dtr);
374 ppbus_wctr(dev, ctr);
375 ppbus_wstr(dev, str);
376
377 return status;
378 }
379
380 /* Log status of status register for printer port */
381 static int
382 lpt_logstatus(const struct device * const dev, const unsigned char status)
383 {
384 int err;
385
386 err = EIO;
387 if(!(status & LPS_SEL)) {
388 log(LOG_ERR, "%s: offline.", dev->dv_xname);
389 }
390 else if(!(status & LPS_NBSY)) {
391 log(LOG_ERR, "%s: busy.", dev->dv_xname);
392 }
393 else if(status & LPS_OUT) {
394 log(LOG_ERR, "%s: out of paper.", dev->dv_xname);
395 err = EAGAIN;
396 }
397 else if(!(status & LPS_NERR)) {
398 log(LOG_ERR, "%s: output error.", dev->dv_xname);
399 }
400 else {
401 log(LOG_ERR, "%s: no error indication.", dev->dv_xname);
402 err = 0;
403 }
404
405 return err;
406 }
407
408 /*
409 * lptopen -- reset the printer, then wait until it's selected and not busy.
410 */
411 int
412 lptopen(dev_t dev_id, int flags, int fmt, struct proc *p)
413 {
414 int trys, err;
415 u_int8_t status;
416 struct device * dev;
417 struct lpt_softc * lpt;
418 struct ppbus_device_softc * ppbus_dev;
419 struct device * ppbus;
420
421 dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
422 if(!dev) {
423 LPT_DPRINTF(("%s(): device not configured.\n", __func__));
424 return ENXIO;
425 }
426
427 lpt = (struct lpt_softc *) dev;
428
429 ppbus = dev->dv_parent;
430 ppbus_dev = &(lpt->ppbus_dev);
431
432 /* Request the ppbus */
433 err = lpt_request_ppbus(lpt, PPBUS_WAIT|PPBUS_INTR);
434 if(err) {
435 LPT_DPRINTF(("%s(%s): error (%d) while requesting bus.\n",
436 __func__, dev->dv_xname, err));
437 return (err);
438 }
439
440 /* Update bus mode */
441 ppbus_dev->ctx.mode = ppbus_get_mode(ppbus);
442
443 /* init printer */
444 if ((lpt->sc_flags & LPT_PRIME) && !LPTCTL(dev_id)) {
445 LPT_VPRINTF(("%s(%s): initializing printer.\n", __func__,
446 dev->dv_xname));
447 lpt->sc_state |= LPTINIT;
448 ppbus_wctr(ppbus, LPC_SEL | LPC_NINIT);
449
450 /* wait till ready (printer running diagnostics) */
451 for(trys = 0, status = ppbus_rstr(ppbus); (status & RDY_MASK)
452 != LP_READY; trys += LPT_STEP, status =
453 ppbus_rstr(ppbus)) {
454
455 /* Time up waiting for the printer */
456 if(trys >= LPT_TIMEOUT)
457 break;
458 /* wait LPT_STEP ticks, give up if we get a signal */
459 else {
460 err = tsleep((caddr_t)lpt, LPPRI|PCATCH,
461 "lptinit", LPT_STEP);
462 if((err) && (err != EWOULDBLOCK)) {
463 lpt->sc_state &= ~LPTINIT;
464 LPT_DPRINTF(("%s(%s): interrupted "
465 "during initialization.\n", __func__,
466 dev->dv_xname));
467 lpt_release_ppbus(lpt, PPBUS_WAIT);
468 return (err);
469 }
470 }
471 }
472
473 lpt->sc_state &= ~LPTINIT;
474 if(trys >= LPT_TIMEOUT) {
475 LPT_DPRINTF(("%s(%s): timed out while initializing "
476 "printer. [status %x]\n", __func__,
477 dev->dv_xname, status));
478 err = lpt_logstatus(dev, status);
479 lpt_release_ppbus(lpt, PPBUS_WAIT);
480 return (err);
481 }
482 else
483 LPT_VPRINTF(("%s(%s): printer ready.\n", __func__,
484 dev->dv_xname));
485 }
486
487 /* Set autolinefeed if requested */
488 if (lpt->sc_flags & LPT_AUTOLF)
489 ppbus_wctr(ppbus, LPC_AUTOL);
490 else
491 ppbus_wctr(ppbus, 0);
492
493 /* ready now */
494 lpt->sc_state |= OPEN;
495
496 return 0;
497 }
498
499 /*
500 * lptclose -- close the device, free the local line buffer.
501 *
502 * Check for interrupted write call added.
503 */
504 int
505 lptclose(dev_t dev_id, int flags, int fmt, struct proc *p)
506 {
507 struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
508 struct lpt_softc * sc = (struct lpt_softc *) dev;
509 int err;
510
511 err = lpt_release_ppbus(sc, PPBUS_WAIT|PPBUS_INTR);
512 if(err) {
513 LPT_DPRINTF(("%s(%s): error (%d) while releasing ppbus.\n",
514 __func__, dev->dv_xname, err));
515 }
516
517 sc->sc_state = 0;
518
519 return err;
520 }
521
522 /*
523 * lptread --retrieve printer status in IEEE1284 NIBBLE mode
524 */
525 int
526 lptread(dev_t dev_id, struct uio *uio, int ioflag)
527 {
528 size_t len = 0;
529 int error = 0;
530 struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
531 struct lpt_softc * sc = (struct lpt_softc *) dev;
532
533 if(!(sc->sc_state & HAVEBUS)) {
534 LPT_DPRINTF(("%s(%s): attempt to read using device which does "
535 "not own the bus(%s).\n", __func__, dev->dv_xname,
536 dev->dv_parent->dv_xname));
537 return (ENODEV);
538 }
539
540 sc->sc_state &= ~INTERRUPTED;
541 while (uio->uio_resid) {
542 error = ppbus_read(dev->dv_parent, sc->sc_outbuf,
543 min(BUFSIZE, uio->uio_resid), 0, &len);
544
545 /* If error or no more data, stop */
546 if (error) {
547 if (error != EWOULDBLOCK)
548 sc->sc_state |= INTERRUPTED;
549 break;
550 }
551 if (len == 0)
552 break;
553
554 if ((error = uiomove(sc->sc_outbuf, len, uio)))
555 break;
556 }
557
558 return error;
559 }
560
561 /*
562 * lptwrite --copy a line from user space to a local buffer, then call
563 * putc to get the chars moved to the output queue.
564 *
565 * Flagging of interrupted write added.
566 */
567 int
568 lptwrite(dev_t dev_id, struct uio * uio, int ioflag)
569 {
570 int error=0;
571 size_t n, cnt;
572 struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
573 struct lpt_softc * sc = (struct lpt_softc *) dev;
574
575 /* Check state and flags */
576 if(!(sc->sc_state & HAVEBUS)) {
577 LPT_DPRINTF(("%s(%s): attempt to write using device which does "
578 "not own the bus(%s).\n", __func__, dev->dv_xname,
579 dev->dv_parent->dv_xname));
580 return EINVAL;
581 }
582
583 LPT_VPRINTF(("%s(%s): writing %d bytes\n", __func__,
584 dev->dv_xname, uio->uio_resid));
585
586 /* Write the data */
587 sc->sc_state &= ~INTERRUPTED;
588 while (uio->uio_resid) {
589 n = MIN(BUFSIZE, uio->uio_resid);
590 error = uiomove(sc->sc_inbuf, n, uio);
591 if (error)
592 break;
593
594 error = ppbus_write(dev->dv_parent, sc->sc_inbuf, n, ioflag,
595 &cnt);
596 if (error) {
597 if (error != EWOULDBLOCK)
598 sc->sc_state |= INTERRUPTED;
599 break;
600 }
601 }
602
603 LPT_VPRINTF(("%s(%s): transfer finished, error %d.\n", __func__,
604 dev->dv_xname, error));
605
606 return error;
607 }
608
609 /* Printer ioctl */
610 int
611 lptioctl(dev_t dev_id, u_long cmd, caddr_t data, int flags, struct proc *p)
612 {
613 struct device *dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
614 struct lpt_softc *sc = (struct lpt_softc *) dev;
615 int val, fl;
616 int error=0;
617
618 if(!(sc->sc_state & HAVEBUS)) {
619 LPT_DPRINTF(("%s(%s): attempt to perform ioctl on device which "
620 "does not own the bus(%s).\n", __func__, dev->dv_xname,
621 dev->dv_parent->dv_xname));
622 return EBUSY;
623 }
624
625 switch (cmd) {
626 case LPTGMODE:
627 switch (ppbus_get_mode(dev->dv_parent)) {
628 case PPBUS_COMPATIBLE:
629 val = mode_standard;
630 break;
631 case PPBUS_NIBBLE:
632 val = mode_nibble;
633 break;
634 case PPBUS_PS2:
635 val = mode_ps2;
636 break;
637 case PPBUS_FAST:
638 val = mode_fast;
639 break;
640 case PPBUS_EPP:
641 val = mode_epp;
642 break;
643 case PPBUS_ECP:
644 val = mode_ecp;
645 break;
646 default:
647 error = EINVAL;
648 val = mode_unknown;
649 break;
650 }
651 *(int *)data = val;
652 break;
653
654 case LPTSMODE:
655 switch (*(int *)data) {
656 case mode_standard:
657 val = PPBUS_COMPATIBLE;
658 break;
659 case mode_nibble:
660 val = PPBUS_NIBBLE;
661 break;
662 case mode_ps2:
663 val = PPBUS_PS2;
664 break;
665 case mode_fast:
666 val = PPBUS_FAST;
667 break;
668 case mode_epp:
669 val = PPBUS_EPP;
670 break;
671 case mode_ecp:
672 val = PPBUS_ECP;
673 break;
674 default:
675 error = EINVAL;
676 val = mode_unknown;
677 break;
678 }
679
680 if (!error)
681 error = ppbus_set_mode(dev->dv_parent, val, 0);
682
683 break;
684
685 case LPTGFLAGS:
686 fl = 0;
687
688 /* DMA */
689 error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_DMA, &val);
690 if (error)
691 break;
692 if (val)
693 fl |= LPT_DMA;
694
695 /* IEEE mode negotiation */
696 error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_IEEE, &val);
697 if (error)
698 break;
699 if (val)
700 fl |= LPT_IEEE;
701
702 /* interrupts */
703 error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_INTR, &val);
704 if (error)
705 break;
706 if (val)
707 fl |= LPT_INTR;
708
709 /* lpt-only flags */
710 fl |= sc->sc_flags;
711
712 *(int *)data = fl;
713 break;
714
715 case LPTSFLAGS:
716 fl = *(int *)data;
717
718 /* DMA */
719 val = (fl & LPT_DMA);
720 error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_DMA, &val);
721 if (error)
722 break;
723
724 /* IEEE mode negotiation */
725 val = (fl & LPT_IEEE);
726 error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_IEEE, &val);
727 if (error)
728 break;
729
730 /* interrupts */
731 val = (fl & LPT_INTR);
732 error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_INTR, &val);
733 if (error)
734 break;
735
736 /* lpt-only flags */
737 sc->sc_flags = fl & (LPT_PRIME|LPT_AUTOLF);
738
739 break;
740
741 default:
742 error = EINVAL;
743 break;
744 }
745
746 return error;
747 }
748
Cache object: 24a7ba0d6b01bce36856cf663e67add4
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