1 /*-
2 * Copyright (c) 1997 Poul-Henning Kamp
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * From Id: lpt.c,v 1.55.2.1 1996/11/12 09:08:38 phk Exp
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/5.3/sys/dev/ppbus/if_plip.c 135266 2004-09-15 15:14:19Z andre $");
31
32 /*
33 * Parallel port TCP/IP interfaces added. I looked at the driver from
34 * MACH but this is a complete rewrite, and btw. incompatible, and it
35 * should perform better too. I have never run the MACH driver though.
36 *
37 * This driver sends two bytes (0x08, 0x00) in front of each packet,
38 * to allow us to distinguish another format later.
39 *
40 * Now added a Linux/Crynwr compatibility mode which is enabled using
41 * IF_LINK0 - Tim Wilkinson.
42 *
43 * TODO:
44 * Make HDLC/PPP mode, use IF_LLC1 to enable.
45 *
46 * Connect the two computers using a Laplink parallel cable to use this
47 * feature:
48 *
49 * +----------------------------------------+
50 * |A-name A-End B-End Descr. Port/Bit |
51 * +----------------------------------------+
52 * |DATA0 2 15 Data 0/0x01 |
53 * |-ERROR 15 2 1/0x08 |
54 * +----------------------------------------+
55 * |DATA1 3 13 Data 0/0x02 |
56 * |+SLCT 13 3 1/0x10 |
57 * +----------------------------------------+
58 * |DATA2 4 12 Data 0/0x04 |
59 * |+PE 12 4 1/0x20 |
60 * +----------------------------------------+
61 * |DATA3 5 10 Strobe 0/0x08 |
62 * |-ACK 10 5 1/0x40 |
63 * +----------------------------------------+
64 * |DATA4 6 11 Data 0/0x10 |
65 * |BUSY 11 6 1/~0x80 |
66 * +----------------------------------------+
67 * |GND 18-25 18-25 GND - |
68 * +----------------------------------------+
69 *
70 * Expect transfer-rates up to 75 kbyte/sec.
71 *
72 * If GCC could correctly grok
73 * register int port asm("edx")
74 * the code would be cleaner
75 *
76 * Poul-Henning Kamp <phk@freebsd.org>
77 */
78
79 /*
80 * Update for ppbus, PLIP support only - Nicolas Souchu
81 */
82
83 #include "opt_plip.h"
84
85 #include <sys/param.h>
86 #include <sys/systm.h>
87 #include <sys/module.h>
88 #include <sys/bus.h>
89 #include <sys/mbuf.h>
90 #include <sys/socket.h>
91 #include <sys/sockio.h>
92 #include <sys/kernel.h>
93 #include <sys/malloc.h>
94
95 #include <machine/bus.h>
96 #include <machine/resource.h>
97 #include <sys/rman.h>
98
99 #include <net/if.h>
100 #include <net/if_types.h>
101 #include <net/netisr.h>
102
103 #include <netinet/in.h>
104 #include <netinet/in_var.h>
105
106 #include <net/bpf.h>
107
108 #include <dev/ppbus/ppbconf.h>
109 #include "ppbus_if.h"
110 #include <dev/ppbus/ppbio.h>
111
112 #ifndef LPMTU /* MTU for the lp# interfaces */
113 #define LPMTU 1500
114 #endif
115
116 #ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */
117 #define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */
118 #endif
119
120 #ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */
121 #define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */
122 #endif
123
124 #ifndef LPMAXERRS /* Max errors before !RUNNING */
125 #define LPMAXERRS 100
126 #endif
127
128 #define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */
129 #define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */
130 #define MLPIPHDRLEN CLPIPHDRLEN
131
132 #define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */
133 #define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */
134 #if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN
135 #define MLPIPHDRLEN LPIPHDRLEN
136 #endif
137
138 #define LPIPTBLSIZE 256 /* Size of octet translation table */
139
140 #define lprintf if (lptflag) printf
141
142 #ifdef PLIP_DEBUG
143 static int volatile lptflag = 1;
144 #else
145 static int volatile lptflag = 0;
146 #endif
147
148 struct lp_data {
149 struct ifnet sc_if;
150 u_char *sc_ifbuf;
151 int sc_iferrs;
152
153 struct resource *res_irq;
154 };
155
156 /* Tables for the lp# interface */
157 static u_char *txmith;
158 #define txmitl (txmith+(1*LPIPTBLSIZE))
159 #define trecvh (txmith+(2*LPIPTBLSIZE))
160 #define trecvl (txmith+(3*LPIPTBLSIZE))
161
162 static u_char *ctxmith;
163 #define ctxmitl (ctxmith+(1*LPIPTBLSIZE))
164 #define ctrecvh (ctxmith+(2*LPIPTBLSIZE))
165 #define ctrecvl (ctxmith+(3*LPIPTBLSIZE))
166
167 /* Functions for the lp# interface */
168 static int lpinittables(void);
169 static int lpioctl(struct ifnet *, u_long, caddr_t);
170 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
171 struct rtentry *);
172 static void lp_intr(void *);
173
174 #define DEVTOSOFTC(dev) \
175 ((struct lp_data *)device_get_softc(dev))
176 #define UNITOSOFTC(unit) \
177 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit)))
178 #define UNITODEVICE(unit) \
179 (devclass_get_device(lp_devclass, (unit)))
180
181 static devclass_t lp_devclass;
182
183 static void
184 lp_identify(driver_t *driver, device_t parent)
185 {
186 device_t dev;
187
188 dev = device_find_child(parent, "plip", 0);
189 if (!dev)
190 BUS_ADD_CHILD(parent, 0, "plip", -1);
191 }
192 /*
193 * lpprobe()
194 */
195 static int
196 lp_probe(device_t dev)
197 {
198 device_t ppbus = device_get_parent(dev);
199 struct lp_data *lp;
200 int zero = 0;
201 uintptr_t irq;
202
203 lp = DEVTOSOFTC(dev);
204
205 /* retrieve the ppbus irq */
206 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq);
207
208 /* if we haven't interrupts, the probe fails */
209 if (irq == -1) {
210 device_printf(dev, "not an interrupt driven port, failed.\n");
211 return (ENXIO);
212 }
213
214 /* reserve the interrupt resource, expecting irq is available to continue */
215 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1,
216 RF_SHAREABLE);
217 if (lp->res_irq == 0) {
218 device_printf(dev, "cannot reserve interrupt, failed.\n");
219 return (ENXIO);
220 }
221
222 /*
223 * lp dependent initialisation.
224 */
225
226 device_set_desc(dev, "PLIP network interface");
227
228 return (0);
229 }
230
231 static int
232 lp_attach (device_t dev)
233 {
234 struct lp_data *lp = DEVTOSOFTC(dev);
235 struct ifnet *ifp = &lp->sc_if;
236
237 ifp->if_softc = lp;
238 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
239 ifp->if_mtu = LPMTU;
240 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST |
241 IFF_NEEDSGIANT;
242 ifp->if_ioctl = lpioctl;
243 ifp->if_output = lpoutput;
244 ifp->if_type = IFT_PARA;
245 ifp->if_hdrlen = 0;
246 ifp->if_addrlen = 0;
247 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
248 if_attach(ifp);
249
250 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
251
252 return (0);
253 }
254 /*
255 * Build the translation tables for the LPIP (BSD unix) protocol.
256 * We don't want to calculate these nasties in our tight loop, so we
257 * precalculate them when we initialize.
258 */
259 static int
260 lpinittables (void)
261 {
262 int i;
263
264 if (!txmith)
265 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
266
267 if (!txmith)
268 return 1;
269
270 if (!ctxmith)
271 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
272
273 if (!ctxmith)
274 return 1;
275
276 for (i=0; i < LPIPTBLSIZE; i++) {
277 ctxmith[i] = (i & 0xF0) >> 4;
278 ctxmitl[i] = 0x10 | (i & 0x0F);
279 ctrecvh[i] = (i & 0x78) << 1;
280 ctrecvl[i] = (i & 0x78) >> 3;
281 }
282
283 for (i=0; i < LPIPTBLSIZE; i++) {
284 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08;
285 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07);
286 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1);
287 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3);
288 }
289
290 return 0;
291 }
292
293 /*
294 * Process an ioctl request.
295 */
296
297 static int
298 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
299 {
300 device_t dev = UNITODEVICE(ifp->if_dunit);
301 device_t ppbus = device_get_parent(dev);
302 struct lp_data *sc = DEVTOSOFTC(dev);
303 struct ifaddr *ifa = (struct ifaddr *)data;
304 struct ifreq *ifr = (struct ifreq *)data;
305 u_char *ptr;
306 void *ih;
307 int error;
308
309 switch (cmd) {
310
311 case SIOCSIFDSTADDR:
312 case SIOCAIFADDR:
313 case SIOCSIFADDR:
314 if (ifa->ifa_addr->sa_family != AF_INET)
315 return EAFNOSUPPORT;
316
317 ifp->if_flags |= IFF_UP;
318 /* FALLTHROUGH */
319 case SIOCSIFFLAGS:
320 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {
321
322 ppb_wctr(ppbus, 0x00);
323 ifp->if_flags &= ~IFF_RUNNING;
324
325 /* IFF_UP is not set, try to release the bus anyway */
326 ppb_release_bus(ppbus, dev);
327 break;
328 }
329 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {
330
331 /* XXX
332 * Should the request be interruptible?
333 */
334 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR)))
335 return (error);
336
337 /* Now IFF_UP means that we own the bus */
338
339 ppb_set_mode(ppbus, PPB_COMPATIBLE);
340
341 if (lpinittables()) {
342 ppb_release_bus(ppbus, dev);
343 return ENOBUFS;
344 }
345
346 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN,
347 M_DEVBUF, M_WAITOK);
348 if (!sc->sc_ifbuf) {
349 ppb_release_bus(ppbus, dev);
350 return ENOBUFS;
351 }
352
353 /* attach our interrupt handler, later detached when the bus is released */
354 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq,
355 INTR_TYPE_NET, lp_intr, dev, &ih))) {
356 ppb_release_bus(ppbus, dev);
357 return (error);
358 }
359
360 ppb_wctr(ppbus, IRQENABLE);
361 ifp->if_flags |= IFF_RUNNING;
362 }
363 break;
364
365 case SIOCSIFMTU:
366 ptr = sc->sc_ifbuf;
367 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT);
368 if (!sc->sc_ifbuf) {
369 sc->sc_ifbuf = ptr;
370 return ENOBUFS;
371 }
372 if (ptr)
373 free(ptr,M_DEVBUF);
374 sc->sc_if.if_mtu = ifr->ifr_mtu;
375 break;
376
377 case SIOCGIFMTU:
378 ifr->ifr_mtu = sc->sc_if.if_mtu;
379 break;
380
381 case SIOCADDMULTI:
382 case SIOCDELMULTI:
383 if (ifr == 0) {
384 return EAFNOSUPPORT; /* XXX */
385 }
386 switch (ifr->ifr_addr.sa_family) {
387
388 case AF_INET:
389 break;
390
391 default:
392 return EAFNOSUPPORT;
393 }
394 break;
395
396 case SIOCGIFMEDIA:
397 /*
398 * No ifmedia support at this stage; maybe use it
399 * in future for eg. protocol selection.
400 */
401 return EINVAL;
402
403 default:
404 lprintf("LP:ioctl(0x%lx)\n", cmd);
405 return EINVAL;
406 }
407 return 0;
408 }
409
410 static __inline int
411 clpoutbyte (u_char byte, int spin, device_t ppbus)
412 {
413 ppb_wdtr(ppbus, ctxmitl[byte]);
414 while (ppb_rstr(ppbus) & CLPIP_SHAKE)
415 if (--spin == 0) {
416 return 1;
417 }
418 ppb_wdtr(ppbus, ctxmith[byte]);
419 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE))
420 if (--spin == 0) {
421 return 1;
422 }
423 return 0;
424 }
425
426 static __inline int
427 clpinbyte (int spin, device_t ppbus)
428 {
429 u_char c, cl;
430
431 while((ppb_rstr(ppbus) & CLPIP_SHAKE))
432 if(!--spin) {
433 return -1;
434 }
435 cl = ppb_rstr(ppbus);
436 ppb_wdtr(ppbus, 0x10);
437
438 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE))
439 if(!--spin) {
440 return -1;
441 }
442 c = ppb_rstr(ppbus);
443 ppb_wdtr(ppbus, 0x00);
444
445 return (ctrecvl[cl] | ctrecvh[c]);
446 }
447
448 static void
449 lptap(struct ifnet *ifp, struct mbuf *m)
450 {
451 u_int32_t af = AF_INET;
452 BPF_MTAP2(ifp, &af, sizeof(af), m);
453 }
454
455 static void
456 lp_intr (void *arg)
457 {
458 device_t dev = (device_t)arg;
459 device_t ppbus = device_get_parent(dev);
460 struct lp_data *sc = DEVTOSOFTC(dev);
461 int len, s, j;
462 u_char *bp;
463 u_char c, cl;
464 struct mbuf *top;
465
466 s = splhigh();
467
468 if (sc->sc_if.if_flags & IFF_LINK0) {
469
470 /* Ack. the request */
471 ppb_wdtr(ppbus, 0x01);
472
473 /* Get the packet length */
474 j = clpinbyte(LPMAXSPIN2, ppbus);
475 if (j == -1)
476 goto err;
477 len = j;
478 j = clpinbyte(LPMAXSPIN2, ppbus);
479 if (j == -1)
480 goto err;
481 len = len + (j << 8);
482 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN)
483 goto err;
484
485 bp = sc->sc_ifbuf;
486
487 while (len--) {
488 j = clpinbyte(LPMAXSPIN2, ppbus);
489 if (j == -1) {
490 goto err;
491 }
492 *bp++ = j;
493 }
494 /* Get and ignore checksum */
495 j = clpinbyte(LPMAXSPIN2, ppbus);
496 if (j == -1) {
497 goto err;
498 }
499
500 len = bp - sc->sc_ifbuf;
501 if (len <= CLPIPHDRLEN)
502 goto err;
503
504 sc->sc_iferrs = 0;
505
506 len -= CLPIPHDRLEN;
507 sc->sc_if.if_ipackets++;
508 sc->sc_if.if_ibytes += len;
509 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0);
510 if (top) {
511 if (sc->sc_if.if_bpf)
512 lptap(&sc->sc_if, top);
513 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */
514 }
515 goto done;
516 }
517 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) {
518 len = sc->sc_if.if_mtu + LPIPHDRLEN;
519 bp = sc->sc_ifbuf;
520 while (len--) {
521
522 cl = ppb_rstr(ppbus);
523 ppb_wdtr(ppbus, 8);
524
525 j = LPMAXSPIN2;
526 while((ppb_rstr(ppbus) & LPIP_SHAKE))
527 if(!--j) goto err;
528
529 c = ppb_rstr(ppbus);
530 ppb_wdtr(ppbus, 0);
531
532 *bp++= trecvh[cl] | trecvl[c];
533
534 j = LPMAXSPIN2;
535 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) {
536 if (cl != c &&
537 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) ==
538 (c & 0xf8))
539 goto end;
540 if (!--j) goto err;
541 }
542 }
543
544 end:
545 len = bp - sc->sc_ifbuf;
546 if (len <= LPIPHDRLEN)
547 goto err;
548
549 sc->sc_iferrs = 0;
550
551 len -= LPIPHDRLEN;
552 sc->sc_if.if_ipackets++;
553 sc->sc_if.if_ibytes += len;
554 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0);
555 if (top) {
556 if (sc->sc_if.if_bpf)
557 lptap(&sc->sc_if, top);
558 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */
559 }
560 }
561 goto done;
562
563 err:
564 ppb_wdtr(ppbus, 0);
565 lprintf("R");
566 sc->sc_if.if_ierrors++;
567 sc->sc_iferrs++;
568
569 /*
570 * We are not able to send receive anything for now,
571 * so stop wasting our time
572 */
573 if (sc->sc_iferrs > LPMAXERRS) {
574 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev));
575 ppb_wctr(ppbus, 0x00);
576 sc->sc_if.if_flags &= ~IFF_RUNNING;
577 sc->sc_iferrs=0;
578 }
579
580 done:
581 splx(s);
582 return;
583 }
584
585 static __inline int
586 lpoutbyte (u_char byte, int spin, device_t ppbus)
587 {
588 ppb_wdtr(ppbus, txmith[byte]);
589 while (!(ppb_rstr(ppbus) & LPIP_SHAKE))
590 if (--spin == 0)
591 return 1;
592 ppb_wdtr(ppbus, txmitl[byte]);
593 while (ppb_rstr(ppbus) & LPIP_SHAKE)
594 if (--spin == 0)
595 return 1;
596 return 0;
597 }
598
599 static int
600 lpoutput (struct ifnet *ifp, struct mbuf *m,
601 struct sockaddr *dst, struct rtentry *rt)
602 {
603 device_t dev = UNITODEVICE(ifp->if_dunit);
604 device_t ppbus = device_get_parent(dev);
605 int s, err;
606 struct mbuf *mm;
607 u_char *cp = "\0\0";
608 u_char chksum = 0;
609 int count = 0;
610 int i, len, spin;
611
612 /* We need a sensible value if we abort */
613 cp++;
614 ifp->if_flags |= IFF_RUNNING;
615
616 err = 1; /* assume we're aborting because of an error */
617
618 s = splhigh();
619
620 /* Suspend (on laptops) or receive-errors might have taken us offline */
621 ppb_wctr(ppbus, IRQENABLE);
622
623 if (ifp->if_flags & IFF_LINK0) {
624
625 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
626 lprintf("&");
627 lp_intr(dev);
628 }
629
630 /* Alert other end to pending packet */
631 spin = LPMAXSPIN1;
632 ppb_wdtr(ppbus, 0x08);
633 while ((ppb_rstr(ppbus) & 0x08) == 0)
634 if (--spin == 0) {
635 goto nend;
636 }
637
638 /* Calculate length of packet, then send that */
639
640 count += 14; /* Ethernet header len */
641
642 mm = m;
643 for (mm = m; mm; mm = mm->m_next) {
644 count += mm->m_len;
645 }
646 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus))
647 goto nend;
648 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus))
649 goto nend;
650
651 /* Send dummy ethernet header */
652 for (i = 0; i < 12; i++) {
653 if (clpoutbyte(i, LPMAXSPIN1, ppbus))
654 goto nend;
655 chksum += i;
656 }
657
658 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus))
659 goto nend;
660 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus))
661 goto nend;
662 chksum += 0x08 + 0x00; /* Add into checksum */
663
664 mm = m;
665 do {
666 cp = mtod(mm, u_char *);
667 len = mm->m_len;
668 while (len--) {
669 chksum += *cp;
670 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus))
671 goto nend;
672 }
673 } while ((mm = mm->m_next));
674
675 /* Send checksum */
676 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus))
677 goto nend;
678
679 /* Go quiescent */
680 ppb_wdtr(ppbus, 0);
681
682 err = 0; /* No errors */
683
684 nend:
685 if (err) { /* if we didn't timeout... */
686 ifp->if_oerrors++;
687 lprintf("X");
688 } else {
689 ifp->if_opackets++;
690 ifp->if_obytes += m->m_pkthdr.len;
691 if (ifp->if_bpf)
692 lptap(ifp, m);
693 }
694
695 m_freem(m);
696
697 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
698 lprintf("^");
699 lp_intr(dev);
700 }
701 (void) splx(s);
702 return 0;
703 }
704
705 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
706 lprintf("&");
707 lp_intr(dev);
708 }
709
710 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus))
711 goto end;
712 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus))
713 goto end;
714
715 mm = m;
716 do {
717 cp = mtod(mm,u_char *);
718 len = mm->m_len;
719 while (len--)
720 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus))
721 goto end;
722 } while ((mm = mm->m_next));
723
724 err = 0; /* no errors were encountered */
725
726 end:
727 --cp;
728 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17);
729
730 if (err) { /* if we didn't timeout... */
731 ifp->if_oerrors++;
732 lprintf("X");
733 } else {
734 ifp->if_opackets++;
735 ifp->if_obytes += m->m_pkthdr.len;
736 if (ifp->if_bpf)
737 lptap(ifp, m);
738 }
739
740 m_freem(m);
741
742 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
743 lprintf("^");
744 lp_intr(dev);
745 }
746
747 (void) splx(s);
748 return 0;
749 }
750
751 static device_method_t lp_methods[] = {
752 /* device interface */
753 DEVMETHOD(device_identify, lp_identify),
754 DEVMETHOD(device_probe, lp_probe),
755 DEVMETHOD(device_attach, lp_attach),
756
757 { 0, 0 }
758 };
759
760 static driver_t lp_driver = {
761 "plip",
762 lp_methods,
763 sizeof(struct lp_data),
764 };
765
766 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0);
Cache object: 923c8bf2d21c2f8af115ec426f843f11
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