Remove unnecessary bzero(softc).
[dragonfly.git] / sys / dev / netif / plip / if_plip.c
CommitLineData
984263bc
MD
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 * $FreeBSD: src/sys/dev/ppbus/if_plip.c,v 1.19.2.1 2000/05/24 00:20:57 n_hibma Exp $
ea0c0e03 28 * $DragonFly: src/sys/dev/netif/plip/if_plip.c,v 1.13 2005/08/29 10:19:52 sephe Exp $
984263bc
MD
29 */
30
31/*
32 * Parallel port TCP/IP interfaces added. I looked at the driver from
33 * MACH but this is a complete rewrite, and btw. incompatible, and it
34 * should perform better too. I have never run the MACH driver though.
35 *
36 * This driver sends two bytes (0x08, 0x00) in front of each packet,
37 * to allow us to distinguish another format later.
38 *
39 * Now added an Linux/Crynwr compatibility mode which is enabled using
40 * IF_LINK0 - Tim Wilkinson.
41 *
42 * TODO:
43 * Make HDLC/PPP mode, use IF_LLC1 to enable.
44 *
45 * Connect the two computers using a Laplink parallel cable to use this
46 * feature:
47 *
48 * +----------------------------------------+
49 * |A-name A-End B-End Descr. Port/Bit |
50 * +----------------------------------------+
51 * |DATA0 2 15 Data 0/0x01 |
52 * |-ERROR 15 2 1/0x08 |
53 * +----------------------------------------+
54 * |DATA1 3 13 Data 0/0x02 |
55 * |+SLCT 13 3 1/0x10 |
56 * +----------------------------------------+
57 * |DATA2 4 12 Data 0/0x04 |
58 * |+PE 12 4 1/0x20 |
59 * +----------------------------------------+
60 * |DATA3 5 10 Strobe 0/0x08 |
61 * |-ACK 10 5 1/0x40 |
62 * +----------------------------------------+
63 * |DATA4 6 11 Data 0/0x10 |
64 * |BUSY 11 6 1/~0x80 |
65 * +----------------------------------------+
66 * |GND 18-25 18-25 GND - |
67 * +----------------------------------------+
68 *
69 * Expect transfer-rates up to 75 kbyte/sec.
70 *
71 * If GCC could correctly grok
72 * register int port asm("edx")
73 * the code would be cleaner
74 *
75 * Poul-Henning Kamp <phk@freebsd.org>
76 */
77
78/*
79 * Update for ppbus, PLIP support only - Nicolas Souchu
80 */
81
82#include "opt_plip.h"
83
84#include <sys/param.h>
85#include <sys/systm.h>
86#include <sys/module.h>
87#include <sys/bus.h>
88#include <sys/mbuf.h>
89#include <sys/socket.h>
90#include <sys/sockio.h>
91#include <sys/kernel.h>
92#include <sys/malloc.h>
a6d5e0d8 93#include <sys/thread2.h>
984263bc
MD
94
95#include <machine/clock.h>
96#include <machine/bus.h>
97#include <machine/resource.h>
98#include <sys/rman.h>
99
100#include <net/if.h>
c2576c10 101#include <net/ifq_var.h>
984263bc
MD
102#include <net/if_types.h>
103#include <net/netisr.h>
104
105#include <netinet/in.h>
106#include <netinet/in_var.h>
107
108#include <net/bpf.h>
109
1f2de5d4 110#include <bus/ppbus/ppbconf.h>
984263bc 111#include "ppbus_if.h"
1f2de5d4 112#include <bus/ppbus/ppbio.h>
984263bc
MD
113
114#ifndef LPMTU /* MTU for the lp# interfaces */
115#define LPMTU 1500
116#endif
117
118#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */
119#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */
120#endif
121
122#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */
123#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */
124#endif
125
126#ifndef LPMAXERRS /* Max errors before !RUNNING */
127#define LPMAXERRS 100
128#endif
129
130#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */
131#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */
132#define MLPIPHDRLEN CLPIPHDRLEN
133
134#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */
135#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */
136#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN
137#define MLPIPHDRLEN LPIPHDRLEN
138#endif
139
140#define LPIPTBLSIZE 256 /* Size of octet translation table */
141
142#define lprintf if (lptflag) printf
143
144#ifdef PLIP_DEBUG
145static int volatile lptflag = 1;
146#else
147static int volatile lptflag = 0;
148#endif
149
150struct lp_data {
151 unsigned short lp_unit;
152
153 struct ifnet sc_if;
154 u_char *sc_ifbuf;
155 int sc_iferrs;
156
157 struct resource *res_irq;
158};
159
160/* Tables for the lp# interface */
161static u_char *txmith;
162#define txmitl (txmith+(1*LPIPTBLSIZE))
163#define trecvh (txmith+(2*LPIPTBLSIZE))
164#define trecvl (txmith+(3*LPIPTBLSIZE))
165
166static u_char *ctxmith;
167#define ctxmitl (ctxmith+(1*LPIPTBLSIZE))
168#define ctrecvh (ctxmith+(2*LPIPTBLSIZE))
169#define ctrecvl (ctxmith+(3*LPIPTBLSIZE))
170
171/* Functions for the lp# interface */
172static int lpinittables(void);
bd4539cc 173static int lpioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
984263bc
MD
174static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
175 struct rtentry *);
176static void lp_intr(void *);
177
178#define DEVTOSOFTC(dev) \
179 ((struct lp_data *)device_get_softc(dev))
180#define UNITOSOFTC(unit) \
181 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit)))
182#define UNITODEVICE(unit) \
183 (devclass_get_device(lp_devclass, (unit)))
184
185static devclass_t lp_devclass;
186
187static void
188lp_identify(driver_t *driver, device_t parent)
189{
190
191 BUS_ADD_CHILD(parent, 0, "plip", 0);
192}
193/*
194 * lpprobe()
195 */
196static int
197lp_probe(device_t dev)
198{
199 device_t ppbus = device_get_parent(dev);
200 struct lp_data *lp;
201 int zero = 0;
202 uintptr_t irq;
203
204 lp = DEVTOSOFTC(dev);
984263bc
MD
205
206 /* retrieve the ppbus irq */
207 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq);
208
209 /* if we haven't interrupts, the probe fails */
210 if (irq == -1) {
211 device_printf(dev, "not an interrupt driven port, failed.\n");
212 return (ENXIO);
213 }
214
215 /* reserve the interrupt resource, expecting irq is available to continue */
216 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1,
217 RF_SHAREABLE);
218 if (lp->res_irq == 0) {
219 device_printf(dev, "cannot reserve interrupt, failed.\n");
220 return (ENXIO);
221 }
222
223 /*
224 * lp dependent initialisation.
225 */
226 lp->lp_unit = device_get_unit(dev);
227
228 device_set_desc(dev, "PLIP network interface");
229
230 return (0);
231}
232
233static int
234lp_attach (device_t dev)
235{
236 struct lp_data *lp = DEVTOSOFTC(dev);
237 struct ifnet *ifp = &lp->sc_if;
238
239 ifp->if_softc = lp;
3e4a09e7 240 if_initname(ifp, "lp", device_get_unit(dev));
984263bc
MD
241 ifp->if_mtu = LPMTU;
242 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST;
243 ifp->if_ioctl = lpioctl;
244 ifp->if_output = lpoutput;
245 ifp->if_type = IFT_PARA;
246 ifp->if_hdrlen = 0;
247 ifp->if_addrlen = 0;
c2576c10 248 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
984263bc
MD
249 if_attach(ifp);
250
251 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
252
253 return (0);
254}
255/*
256 * Build the translation tables for the LPIP (BSD unix) protocol.
257 * We don't want to calculate these nasties in our tight loop, so we
258 * precalculate them when we initialize.
259 */
260static int
261lpinittables (void)
262{
263 int i;
264
265 if (!txmith)
c5541aee 266 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_WAITOK);
984263bc
MD
267
268 if (!ctxmith)
c5541aee 269 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_WAITOK);
984263bc
MD
270
271 for (i=0; i < LPIPTBLSIZE; i++) {
272 ctxmith[i] = (i & 0xF0) >> 4;
273 ctxmitl[i] = 0x10 | (i & 0x0F);
274 ctrecvh[i] = (i & 0x78) << 1;
275 ctrecvl[i] = (i & 0x78) >> 3;
276 }
277
278 for (i=0; i < LPIPTBLSIZE; i++) {
279 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08;
280 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07);
281 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1);
282 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3);
283 }
284
285 return 0;
286}
287
288/*
289 * Process an ioctl request.
290 */
291
292static int
bd4539cc 293lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
984263bc 294{
3e4a09e7 295 device_t dev = UNITODEVICE(ifp->if_dunit);
984263bc
MD
296 device_t ppbus = device_get_parent(dev);
297 struct lp_data *sc = DEVTOSOFTC(dev);
298 struct ifaddr *ifa = (struct ifaddr *)data;
299 struct ifreq *ifr = (struct ifreq *)data;
300 u_char *ptr;
301 void *ih;
302 int error;
303
304 switch (cmd) {
305
306 case SIOCSIFDSTADDR:
307 case SIOCAIFADDR:
308 case SIOCSIFADDR:
309 if (ifa->ifa_addr->sa_family != AF_INET)
310 return EAFNOSUPPORT;
311
312 ifp->if_flags |= IFF_UP;
313 /* FALLTHROUGH */
314 case SIOCSIFFLAGS:
315 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {
316
317 ppb_wctr(ppbus, 0x00);
318 ifp->if_flags &= ~IFF_RUNNING;
319
320 /* IFF_UP is not set, try to release the bus anyway */
321 ppb_release_bus(ppbus, dev);
322 break;
323 }
324 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {
325
326 /* XXX
327 * Should the request be interruptible?
328 */
329 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR)))
330 return (error);
331
332 /* Now IFF_UP means that we own the bus */
333
334 ppb_set_mode(ppbus, PPB_COMPATIBLE);
335
336 if (lpinittables()) {
337 ppb_release_bus(ppbus, dev);
338 return ENOBUFS;
339 }
340
341 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN,
342 M_DEVBUF, M_WAITOK);
343 if (!sc->sc_ifbuf) {
344 ppb_release_bus(ppbus, dev);
345 return ENOBUFS;
346 }
347
348 /* attach our interrupt handler, later detached when the bus is released */
e9cb6d99
MD
349 error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, INTR_TYPE_NET,
350 lp_intr, dev, &ih, NULL);
351 if (error) {
984263bc
MD
352 ppb_release_bus(ppbus, dev);
353 return (error);
354 }
355
356 ppb_wctr(ppbus, IRQENABLE);
357 ifp->if_flags |= IFF_RUNNING;
358 }
359 break;
360
361 case SIOCSIFMTU:
362 ptr = sc->sc_ifbuf;
c5541aee 363 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_WAITOK);
984263bc
MD
364 if (ptr)
365 free(ptr,M_DEVBUF);
366 sc->sc_if.if_mtu = ifr->ifr_mtu;
367 break;
368
369 case SIOCGIFMTU:
370 ifr->ifr_mtu = sc->sc_if.if_mtu;
371 break;
372
373 case SIOCADDMULTI:
374 case SIOCDELMULTI:
375 if (ifr == 0) {
376 return EAFNOSUPPORT; /* XXX */
377 }
378 switch (ifr->ifr_addr.sa_family) {
379
380 case AF_INET:
381 break;
382
383 default:
384 return EAFNOSUPPORT;
385 }
386 break;
387
388 case SIOCGIFMEDIA:
389 /*
390 * No ifmedia support at this stage; maybe use it
391 * in future for eg. protocol selection.
392 */
393 return EINVAL;
394
395 default:
396 lprintf("LP:ioctl(0x%lx)\n", cmd);
397 return EINVAL;
398 }
399 return 0;
400}
401
402static __inline int
403clpoutbyte (u_char byte, int spin, device_t ppbus)
404{
405 ppb_wdtr(ppbus, ctxmitl[byte]);
406 while (ppb_rstr(ppbus) & CLPIP_SHAKE)
407 if (--spin == 0) {
408 return 1;
409 }
410 ppb_wdtr(ppbus, ctxmith[byte]);
411 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE))
412 if (--spin == 0) {
413 return 1;
414 }
415 return 0;
416}
417
418static __inline int
419clpinbyte (int spin, device_t ppbus)
420{
421 u_char c, cl;
422
423 while((ppb_rstr(ppbus) & CLPIP_SHAKE))
424 if(!--spin) {
425 return -1;
426 }
427 cl = ppb_rstr(ppbus);
428 ppb_wdtr(ppbus, 0x10);
429
430 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE))
431 if(!--spin) {
432 return -1;
433 }
434 c = ppb_rstr(ppbus);
435 ppb_wdtr(ppbus, 0x00);
436
437 return (ctrecvl[cl] | ctrecvh[c]);
438}
439
440static void
441lptap(struct ifnet *ifp, struct mbuf *m)
442{
443 /*
1f8e62c9 444 * We need to prepend the address family as a four byte field.
984263bc 445 */
1f8e62c9
JS
446 static const uint32_t af = AF_INET;
447
448 if (ifp->if_bpf)
449 bpf_ptap(ifp->if_bpf, m, &af, sizeof(af));
984263bc
MD
450}
451
452static void
453lp_intr (void *arg)
454{
455 device_t dev = (device_t)arg;
456 device_t ppbus = device_get_parent(dev);
457 struct lp_data *sc = DEVTOSOFTC(dev);
a6d5e0d8 458 int len, j;
984263bc
MD
459 u_char *bp;
460 u_char c, cl;
461 struct mbuf *top;
462
a6d5e0d8 463 crit_enter();
984263bc
MD
464
465 if (sc->sc_if.if_flags & IFF_LINK0) {
466
467 /* Ack. the request */
468 ppb_wdtr(ppbus, 0x01);
469
470 /* Get the packet length */
471 j = clpinbyte(LPMAXSPIN2, ppbus);
472 if (j == -1)
473 goto err;
474 len = j;
475 j = clpinbyte(LPMAXSPIN2, ppbus);
476 if (j == -1)
477 goto err;
478 len = len + (j << 8);
479 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN)
480 goto err;
481
482 bp = sc->sc_ifbuf;
483
484 while (len--) {
485 j = clpinbyte(LPMAXSPIN2, ppbus);
486 if (j == -1) {
487 goto err;
488 }
489 *bp++ = j;
490 }
491 /* Get and ignore checksum */
492 j = clpinbyte(LPMAXSPIN2, ppbus);
493 if (j == -1) {
494 goto err;
495 }
496
497 len = bp - sc->sc_ifbuf;
498 if (len <= CLPIPHDRLEN)
499 goto err;
500
501 sc->sc_iferrs = 0;
502
984263bc
MD
503 len -= CLPIPHDRLEN;
504 sc->sc_if.if_ipackets++;
505 sc->sc_if.if_ibytes += len;
506 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0);
507 if (top) {
508 if (sc->sc_if.if_bpf)
509 lptap(&sc->sc_if, top);
8bde602d 510 netisr_queue(NETISR_IP, top);
984263bc
MD
511 }
512 goto done;
513 }
514 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) {
515 len = sc->sc_if.if_mtu + LPIPHDRLEN;
516 bp = sc->sc_ifbuf;
517 while (len--) {
518
519 cl = ppb_rstr(ppbus);
520 ppb_wdtr(ppbus, 8);
521
522 j = LPMAXSPIN2;
523 while((ppb_rstr(ppbus) & LPIP_SHAKE))
524 if(!--j) goto err;
525
526 c = ppb_rstr(ppbus);
527 ppb_wdtr(ppbus, 0);
528
529 *bp++= trecvh[cl] | trecvl[c];
530
531 j = LPMAXSPIN2;
532 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) {
533 if (cl != c &&
534 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) ==
535 (c & 0xf8))
536 goto end;
537 if (!--j) goto err;
538 }
539 }
540
541 end:
542 len = bp - sc->sc_ifbuf;
543 if (len <= LPIPHDRLEN)
544 goto err;
545
546 sc->sc_iferrs = 0;
547
984263bc
MD
548 len -= LPIPHDRLEN;
549 sc->sc_if.if_ipackets++;
550 sc->sc_if.if_ibytes += len;
551 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0);
552 if (top) {
553 if (sc->sc_if.if_bpf)
554 lptap(&sc->sc_if, top);
8bde602d 555 netisr_queue(NETISR_IP, top);
984263bc
MD
556 }
557 }
558 goto done;
559
560 err:
561 ppb_wdtr(ppbus, 0);
562 lprintf("R");
563 sc->sc_if.if_ierrors++;
564 sc->sc_iferrs++;
565
566 /*
567 * We are not able to send receive anything for now,
568 * so stop wasting our time
569 */
570 if (sc->sc_iferrs > LPMAXERRS) {
571 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev));
572 ppb_wctr(ppbus, 0x00);
573 sc->sc_if.if_flags &= ~IFF_RUNNING;
574 sc->sc_iferrs=0;
575 }
576
577 done:
a6d5e0d8 578 crit_exit();
984263bc
MD
579 return;
580}
581
582static __inline int
583lpoutbyte (u_char byte, int spin, device_t ppbus)
584{
585 ppb_wdtr(ppbus, txmith[byte]);
586 while (!(ppb_rstr(ppbus) & LPIP_SHAKE))
587 if (--spin == 0)
588 return 1;
589 ppb_wdtr(ppbus, txmitl[byte]);
590 while (ppb_rstr(ppbus) & LPIP_SHAKE)
591 if (--spin == 0)
592 return 1;
593 return 0;
594}
595
596static int
597lpoutput (struct ifnet *ifp, struct mbuf *m,
598 struct sockaddr *dst, struct rtentry *rt)
599{
3e4a09e7 600 device_t dev = UNITODEVICE(ifp->if_dunit);
984263bc 601 device_t ppbus = device_get_parent(dev);
a6d5e0d8 602 int err;
984263bc
MD
603 struct mbuf *mm;
604 u_char *cp = "\0\0";
605 u_char chksum = 0;
606 int count = 0;
607 int i, len, spin;
608
609 /* We need a sensible value if we abort */
610 cp++;
611 ifp->if_flags |= IFF_RUNNING;
612
613 err = 1; /* assume we're aborting because of an error */
614
a6d5e0d8 615 crit_enter();
984263bc
MD
616
617 /* Suspend (on laptops) or receive-errors might have taken us offline */
618 ppb_wctr(ppbus, IRQENABLE);
619
620 if (ifp->if_flags & IFF_LINK0) {
621
622 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
623 lprintf("&");
624 lp_intr(dev);
625 }
626
627 /* Alert other end to pending packet */
628 spin = LPMAXSPIN1;
629 ppb_wdtr(ppbus, 0x08);
630 while ((ppb_rstr(ppbus) & 0x08) == 0)
631 if (--spin == 0) {
632 goto nend;
633 }
634
635 /* Calculate length of packet, then send that */
636
637 count += 14; /* Ethernet header len */
638
639 mm = m;
640 for (mm = m; mm; mm = mm->m_next) {
641 count += mm->m_len;
642 }
643 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus))
644 goto nend;
645 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus))
646 goto nend;
647
648 /* Send dummy ethernet header */
649 for (i = 0; i < 12; i++) {
650 if (clpoutbyte(i, LPMAXSPIN1, ppbus))
651 goto nend;
652 chksum += i;
653 }
654
655 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus))
656 goto nend;
657 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus))
658 goto nend;
659 chksum += 0x08 + 0x00; /* Add into checksum */
660
661 mm = m;
662 do {
663 cp = mtod(mm, u_char *);
664 len = mm->m_len;
665 while (len--) {
666 chksum += *cp;
667 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus))
668 goto nend;
669 }
670 } while ((mm = mm->m_next));
671
672 /* Send checksum */
673 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus))
674 goto nend;
675
676 /* Go quiescent */
677 ppb_wdtr(ppbus, 0);
678
679 err = 0; /* No errors */
680
681 nend:
682 if (err) { /* if we didn't timeout... */
683 ifp->if_oerrors++;
684 lprintf("X");
685 } else {
686 ifp->if_opackets++;
687 ifp->if_obytes += m->m_pkthdr.len;
688 if (ifp->if_bpf)
689 lptap(ifp, m);
690 }
691
692 m_freem(m);
693
694 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
695 lprintf("^");
696 lp_intr(dev);
697 }
a6d5e0d8 698 crit_exit();
984263bc
MD
699 return 0;
700 }
701
702 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
703 lprintf("&");
704 lp_intr(dev);
705 }
706
707 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus))
708 goto end;
709 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus))
710 goto end;
711
712 mm = m;
713 do {
714 cp = mtod(mm,u_char *);
715 len = mm->m_len;
716 while (len--)
717 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus))
718 goto end;
719 } while ((mm = mm->m_next));
720
721 err = 0; /* no errors were encountered */
722
723 end:
724 --cp;
725 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17);
726
727 if (err) { /* if we didn't timeout... */
728 ifp->if_oerrors++;
729 lprintf("X");
730 } else {
731 ifp->if_opackets++;
732 ifp->if_obytes += m->m_pkthdr.len;
733 if (ifp->if_bpf)
734 lptap(ifp, m);
735 }
736
737 m_freem(m);
738
739 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
740 lprintf("^");
741 lp_intr(dev);
742 }
743
a6d5e0d8 744 crit_exit();
984263bc
MD
745 return 0;
746}
747
748static device_method_t lp_methods[] = {
749 /* device interface */
750 DEVMETHOD(device_identify, lp_identify),
751 DEVMETHOD(device_probe, lp_probe),
752 DEVMETHOD(device_attach, lp_attach),
753
754 { 0, 0 }
755};
756
757static driver_t lp_driver = {
758 "plip",
759 lp_methods,
760 sizeof(struct lp_data),
761};
762
32832096
MD
763DECLARE_DUMMY_MODULE(if_plip);
764DRIVER_MODULE(if_plip, ppbus, lp_driver, lp_devclass, 0, 0);
765