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: head/sys/dev/ppbus/if_plip.c 147256 2005-06-10 16:49:24Z brooks $");
|
| 30__FBSDID("$FreeBSD: head/sys/dev/ppbus/if_plip.c 148887 2005-08-09 10:20:02Z rwatson $"); |
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
143static int volatile lptflag = 1;
144#else
145static int volatile lptflag = 0;
146#endif
147
148struct lp_data {
149 struct ifnet *sc_ifp;
150 u_char *sc_ifbuf;
151 int sc_iferrs;
152
153 struct resource *res_irq;
154};
155
156/* Tables for the lp# interface */
157static u_char *txmith;
158#define txmitl (txmith+(1*LPIPTBLSIZE))
159#define trecvh (txmith+(2*LPIPTBLSIZE))
160#define trecvl (txmith+(3*LPIPTBLSIZE))
161
162static 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 */
168static int lpinittables(void);
169static int lpioctl(struct ifnet *, u_long, caddr_t);
170static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
171 struct rtentry *);
172static 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
181static devclass_t lp_devclass;
182
183static void
184lp_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 */
195static int
196lp_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
231static int
232lp_attach (device_t dev)
233{
234 struct lp_data *lp = DEVTOSOFTC(dev);
235 struct ifnet *ifp;
236
237 ifp = lp->sc_ifp = if_alloc(IFT_PARA);
238 if (ifp == NULL) {
239 return (ENOSPC);
240 }
241
242 ifp->if_softc = lp;
243 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
244 ifp->if_mtu = LPMTU;
245 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST |
246 IFF_NEEDSGIANT;
247 ifp->if_ioctl = lpioctl;
248 ifp->if_output = lpoutput;
249 ifp->if_hdrlen = 0;
250 ifp->if_addrlen = 0;
251 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
252 if_attach(ifp);
253
254 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
255
256 return (0);
257}
258/*
259 * Build the translation tables for the LPIP (BSD unix) protocol.
260 * We don't want to calculate these nasties in our tight loop, so we
261 * precalculate them when we initialize.
262 */
263static int
264lpinittables (void)
265{
266 int i;
267
268 if (!txmith)
269 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
270
271 if (!txmith)
272 return 1;
273
274 if (!ctxmith)
275 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
276
277 if (!ctxmith)
278 return 1;
279
280 for (i=0; i < LPIPTBLSIZE; i++) {
281 ctxmith[i] = (i & 0xF0) >> 4;
282 ctxmitl[i] = 0x10 | (i & 0x0F);
283 ctrecvh[i] = (i & 0x78) << 1;
284 ctrecvl[i] = (i & 0x78) >> 3;
285 }
286
287 for (i=0; i < LPIPTBLSIZE; i++) {
288 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08;
289 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07);
290 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1);
291 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3);
292 }
293
294 return 0;
295}
296
297/*
298 * Process an ioctl request.
299 */
300
301static int
302lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
303{
304 device_t dev = UNITODEVICE(ifp->if_dunit);
305 device_t ppbus = device_get_parent(dev);
306 struct lp_data *sc = DEVTOSOFTC(dev);
307 struct ifaddr *ifa = (struct ifaddr *)data;
308 struct ifreq *ifr = (struct ifreq *)data;
309 u_char *ptr;
310 void *ih;
311 int error;
312
313 switch (cmd) {
314
315 case SIOCSIFDSTADDR:
316 case SIOCAIFADDR:
317 case SIOCSIFADDR:
318 if (ifa->ifa_addr->sa_family != AF_INET)
319 return EAFNOSUPPORT;
320
321 ifp->if_flags |= IFF_UP;
322 /* FALLTHROUGH */
323 case SIOCSIFFLAGS:
|
324 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {
|
324 if ((!(ifp->if_flags & IFF_UP)) &&
325 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { |
326
327 ppb_wctr(ppbus, 0x00);
|
327 ifp->if_flags &= ~IFF_RUNNING;
|
| 328 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; |
329
330 /* IFF_UP is not set, try to release the bus anyway */
331 ppb_release_bus(ppbus, dev);
332 break;
333 }
|
333 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {
|
334 if (((ifp->if_flags & IFF_UP)) &&
335 (!(ifp->if_drv_flags & IFF_DRV_RUNNING))) { |
336
337 /* XXX
338 * Should the request be interruptible?
339 */
340 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR)))
341 return (error);
342
343 /* Now IFF_UP means that we own the bus */
344
345 ppb_set_mode(ppbus, PPB_COMPATIBLE);
346
347 if (lpinittables()) {
348 ppb_release_bus(ppbus, dev);
349 return ENOBUFS;
350 }
351
352 sc->sc_ifbuf = malloc(sc->sc_ifp->if_mtu + MLPIPHDRLEN,
353 M_DEVBUF, M_WAITOK);
354 if (!sc->sc_ifbuf) {
355 ppb_release_bus(ppbus, dev);
356 return ENOBUFS;
357 }
358
359 /* attach our interrupt handler, later detached when the bus is released */
360 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq,
361 INTR_TYPE_NET, lp_intr, dev, &ih))) {
362 ppb_release_bus(ppbus, dev);
363 return (error);
364 }
365
366 ppb_wctr(ppbus, IRQENABLE);
|
365 ifp->if_flags |= IFF_RUNNING;
|
| 367 ifp->if_drv_flags |= IFF_DRV_RUNNING; |
368 }
369 break;
370
371 case SIOCSIFMTU:
372 ptr = sc->sc_ifbuf;
373 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT);
374 if (!sc->sc_ifbuf) {
375 sc->sc_ifbuf = ptr;
376 return ENOBUFS;
377 }
378 if (ptr)
379 free(ptr,M_DEVBUF);
380 sc->sc_ifp->if_mtu = ifr->ifr_mtu;
381 break;
382
383 case SIOCGIFMTU:
384 ifr->ifr_mtu = sc->sc_ifp->if_mtu;
385 break;
386
387 case SIOCADDMULTI:
388 case SIOCDELMULTI:
389 if (ifr == 0) {
390 return EAFNOSUPPORT; /* XXX */
391 }
392 switch (ifr->ifr_addr.sa_family) {
393
394 case AF_INET:
395 break;
396
397 default:
398 return EAFNOSUPPORT;
399 }
400 break;
401
402 case SIOCGIFMEDIA:
403 /*
404 * No ifmedia support at this stage; maybe use it
405 * in future for eg. protocol selection.
406 */
407 return EINVAL;
408
409 default:
410 lprintf("LP:ioctl(0x%lx)\n", cmd);
411 return EINVAL;
412 }
413 return 0;
414}
415
416static __inline int
417clpoutbyte (u_char byte, int spin, device_t ppbus)
418{
419 ppb_wdtr(ppbus, ctxmitl[byte]);
420 while (ppb_rstr(ppbus) & CLPIP_SHAKE)
421 if (--spin == 0) {
422 return 1;
423 }
424 ppb_wdtr(ppbus, ctxmith[byte]);
425 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE))
426 if (--spin == 0) {
427 return 1;
428 }
429 return 0;
430}
431
432static __inline int
433clpinbyte (int spin, device_t ppbus)
434{
435 u_char c, cl;
436
437 while((ppb_rstr(ppbus) & CLPIP_SHAKE))
438 if(!--spin) {
439 return -1;
440 }
441 cl = ppb_rstr(ppbus);
442 ppb_wdtr(ppbus, 0x10);
443
444 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE))
445 if(!--spin) {
446 return -1;
447 }
448 c = ppb_rstr(ppbus);
449 ppb_wdtr(ppbus, 0x00);
450
451 return (ctrecvl[cl] | ctrecvh[c]);
452}
453
454static void
455lptap(struct ifnet *ifp, struct mbuf *m)
456{
457 u_int32_t af = AF_INET;
458 BPF_MTAP2(ifp, &af, sizeof(af), m);
459}
460
461static void
462lp_intr (void *arg)
463{
464 device_t dev = (device_t)arg;
465 device_t ppbus = device_get_parent(dev);
466 struct lp_data *sc = DEVTOSOFTC(dev);
467 int len, s, j;
468 u_char *bp;
469 u_char c, cl;
470 struct mbuf *top;
471
472 s = splhigh();
473
474 if (sc->sc_ifp->if_flags & IFF_LINK0) {
475
476 /* Ack. the request */
477 ppb_wdtr(ppbus, 0x01);
478
479 /* Get the packet length */
480 j = clpinbyte(LPMAXSPIN2, ppbus);
481 if (j == -1)
482 goto err;
483 len = j;
484 j = clpinbyte(LPMAXSPIN2, ppbus);
485 if (j == -1)
486 goto err;
487 len = len + (j << 8);
488 if (len > sc->sc_ifp->if_mtu + MLPIPHDRLEN)
489 goto err;
490
491 bp = sc->sc_ifbuf;
492
493 while (len--) {
494 j = clpinbyte(LPMAXSPIN2, ppbus);
495 if (j == -1) {
496 goto err;
497 }
498 *bp++ = j;
499 }
500 /* Get and ignore checksum */
501 j = clpinbyte(LPMAXSPIN2, ppbus);
502 if (j == -1) {
503 goto err;
504 }
505
506 len = bp - sc->sc_ifbuf;
507 if (len <= CLPIPHDRLEN)
508 goto err;
509
510 sc->sc_iferrs = 0;
511
512 len -= CLPIPHDRLEN;
513 sc->sc_ifp->if_ipackets++;
514 sc->sc_ifp->if_ibytes += len;
515 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, sc->sc_ifp, 0);
516 if (top) {
517 if (sc->sc_ifp->if_bpf)
518 lptap(sc->sc_ifp, top);
519 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */
520 }
521 goto done;
522 }
523 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) {
524 len = sc->sc_ifp->if_mtu + LPIPHDRLEN;
525 bp = sc->sc_ifbuf;
526 while (len--) {
527
528 cl = ppb_rstr(ppbus);
529 ppb_wdtr(ppbus, 8);
530
531 j = LPMAXSPIN2;
532 while((ppb_rstr(ppbus) & LPIP_SHAKE))
533 if(!--j) goto err;
534
535 c = ppb_rstr(ppbus);
536 ppb_wdtr(ppbus, 0);
537
538 *bp++= trecvh[cl] | trecvl[c];
539
540 j = LPMAXSPIN2;
541 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) {
542 if (cl != c &&
543 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) ==
544 (c & 0xf8))
545 goto end;
546 if (!--j) goto err;
547 }
548 }
549
550 end:
551 len = bp - sc->sc_ifbuf;
552 if (len <= LPIPHDRLEN)
553 goto err;
554
555 sc->sc_iferrs = 0;
556
557 len -= LPIPHDRLEN;
558 sc->sc_ifp->if_ipackets++;
559 sc->sc_ifp->if_ibytes += len;
560 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, sc->sc_ifp, 0);
561 if (top) {
562 if (sc->sc_ifp->if_bpf)
563 lptap(sc->sc_ifp, top);
564 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */
565 }
566 }
567 goto done;
568
569 err:
570 ppb_wdtr(ppbus, 0);
571 lprintf("R");
572 sc->sc_ifp->if_ierrors++;
573 sc->sc_iferrs++;
574
575 /*
576 * We are not able to send receive anything for now,
577 * so stop wasting our time
578 */
579 if (sc->sc_iferrs > LPMAXERRS) {
580 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev));
581 ppb_wctr(ppbus, 0x00);
|
580 sc->sc_ifp->if_flags &= ~IFF_RUNNING;
|
| 582 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; |
583 sc->sc_iferrs=0;
584 }
585
586 done:
587 splx(s);
588 return;
589}
590
591static __inline int
592lpoutbyte (u_char byte, int spin, device_t ppbus)
593{
594 ppb_wdtr(ppbus, txmith[byte]);
595 while (!(ppb_rstr(ppbus) & LPIP_SHAKE))
596 if (--spin == 0)
597 return 1;
598 ppb_wdtr(ppbus, txmitl[byte]);
599 while (ppb_rstr(ppbus) & LPIP_SHAKE)
600 if (--spin == 0)
601 return 1;
602 return 0;
603}
604
605static int
606lpoutput (struct ifnet *ifp, struct mbuf *m,
607 struct sockaddr *dst, struct rtentry *rt)
608{
609 device_t dev = UNITODEVICE(ifp->if_dunit);
610 device_t ppbus = device_get_parent(dev);
611 int s, err;
612 struct mbuf *mm;
613 u_char *cp = "\0\0";
614 u_char chksum = 0;
615 int count = 0;
616 int i, len, spin;
617
618 /* We need a sensible value if we abort */
619 cp++;
|
618 ifp->if_flags |= IFF_RUNNING;
|
| 620 ifp->if_drv_flags |= IFF_DRV_RUNNING; |
621
622 err = 1; /* assume we're aborting because of an error */
623
624 s = splhigh();
625
626 /* Suspend (on laptops) or receive-errors might have taken us offline */
627 ppb_wctr(ppbus, IRQENABLE);
628
629 if (ifp->if_flags & IFF_LINK0) {
630
631 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
632 lprintf("&");
633 lp_intr(dev);
634 }
635
636 /* Alert other end to pending packet */
637 spin = LPMAXSPIN1;
638 ppb_wdtr(ppbus, 0x08);
639 while ((ppb_rstr(ppbus) & 0x08) == 0)
640 if (--spin == 0) {
641 goto nend;
642 }
643
644 /* Calculate length of packet, then send that */
645
646 count += 14; /* Ethernet header len */
647
648 mm = m;
649 for (mm = m; mm; mm = mm->m_next) {
650 count += mm->m_len;
651 }
652 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus))
653 goto nend;
654 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus))
655 goto nend;
656
657 /* Send dummy ethernet header */
658 for (i = 0; i < 12; i++) {
659 if (clpoutbyte(i, LPMAXSPIN1, ppbus))
660 goto nend;
661 chksum += i;
662 }
663
664 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus))
665 goto nend;
666 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus))
667 goto nend;
668 chksum += 0x08 + 0x00; /* Add into checksum */
669
670 mm = m;
671 do {
672 cp = mtod(mm, u_char *);
673 len = mm->m_len;
674 while (len--) {
675 chksum += *cp;
676 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus))
677 goto nend;
678 }
679 } while ((mm = mm->m_next));
680
681 /* Send checksum */
682 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus))
683 goto nend;
684
685 /* Go quiescent */
686 ppb_wdtr(ppbus, 0);
687
688 err = 0; /* No errors */
689
690 nend:
691 if (err) { /* if we didn't timeout... */
692 ifp->if_oerrors++;
693 lprintf("X");
694 } else {
695 ifp->if_opackets++;
696 ifp->if_obytes += m->m_pkthdr.len;
697 if (ifp->if_bpf)
698 lptap(ifp, m);
699 }
700
701 m_freem(m);
702
703 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
704 lprintf("^");
705 lp_intr(dev);
706 }
707 (void) splx(s);
708 return 0;
709 }
710
711 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
712 lprintf("&");
713 lp_intr(dev);
714 }
715
716 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus))
717 goto end;
718 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus))
719 goto end;
720
721 mm = m;
722 do {
723 cp = mtod(mm,u_char *);
724 len = mm->m_len;
725 while (len--)
726 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus))
727 goto end;
728 } while ((mm = mm->m_next));
729
730 err = 0; /* no errors were encountered */
731
732 end:
733 --cp;
734 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17);
735
736 if (err) { /* if we didn't timeout... */
737 ifp->if_oerrors++;
738 lprintf("X");
739 } else {
740 ifp->if_opackets++;
741 ifp->if_obytes += m->m_pkthdr.len;
742 if (ifp->if_bpf)
743 lptap(ifp, m);
744 }
745
746 m_freem(m);
747
748 if (ppb_rstr(ppbus) & LPIP_SHAKE) {
749 lprintf("^");
750 lp_intr(dev);
751 }
752
753 (void) splx(s);
754 return 0;
755}
756
757static device_method_t lp_methods[] = {
758 /* device interface */
759 DEVMETHOD(device_identify, lp_identify),
760 DEVMETHOD(device_probe, lp_probe),
761 DEVMETHOD(device_attach, lp_attach),
762
763 { 0, 0 }
764};
765
766static driver_t lp_driver = {
767 "plip",
768 lp_methods,
769 sizeof(struct lp_data),
770};
771
772DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0);
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