xref: /netbsd/sys/dev/pcmcia/mhzc.c (revision bf9ec67e)
1 /*	$NetBSD: mhzc.c,v 1.8 2001/11/13 07:26:34 lukem Exp $	*/
2 
3 /*-
4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9  * NASA Ames Research Center.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *	This product includes software developed by the NetBSD
22  *	Foundation, Inc. and its contributors.
23  * 4. Neither the name of The NetBSD Foundation nor the names of its
24  *    contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37  * POSSIBILITY OF SUCH DAMAGE.
38  */
39 
40 /*
41  * Device driver for the Megaherz X-JACK Ethernet/Modem combo cards.
42  *
43  * Many thanks to Chuck Cranor for having the patience to sift through
44  * the Linux smc91c92_cs.c driver to find the magic details to get this
45  * working!
46  */
47 
48 #include <sys/cdefs.h>
49 __KERNEL_RCSID(0, "$NetBSD: mhzc.c,v 1.8 2001/11/13 07:26:34 lukem Exp $");
50 
51 #include "opt_inet.h"
52 #include "opt_ns.h"
53 #include "bpfilter.h"
54 
55 #include <sys/param.h>
56 #include <sys/systm.h>
57 #include <sys/mbuf.h>
58 #include <sys/socket.h>
59 #include <sys/ioctl.h>
60 #include <sys/errno.h>
61 #include <sys/syslog.h>
62 #include <sys/select.h>
63 #include <sys/tty.h>
64 #include <sys/device.h>
65 
66 #include <net/if.h>
67 #include <net/if_dl.h>
68 #include <net/if_ether.h>
69 #include <net/if_media.h>
70 
71 #ifdef INET
72 #include <netinet/in.h>
73 #include <netinet/in_systm.h>
74 #include <netinet/in_var.h>
75 #include <netinet/ip.h>
76 #include <netinet/if_inarp.h>
77 #endif
78 
79 #ifdef NS
80 #include <netns/ns.h>
81 #include <netns/ns_if.h>
82 #endif
83 
84 #if NBPFILTER > 0
85 #include <net/bpf.h>
86 #include <net/bpfdesc.h>
87 #endif
88 
89 #include <machine/intr.h>
90 #include <machine/bus.h>
91 
92 #include <dev/ic/comreg.h>
93 #include <dev/ic/comvar.h>
94 
95 #include <dev/mii/mii.h>
96 #include <dev/mii/miivar.h>
97 
98 #include <dev/ic/smc91cxxreg.h>
99 #include <dev/ic/smc91cxxvar.h>
100 
101 #include <dev/pcmcia/pcmciareg.h>
102 #include <dev/pcmcia/pcmciavar.h>
103 #include <dev/pcmcia/pcmciadevs.h>
104 
105 #include "mhzc.h"
106 
107 struct mhzc_softc {
108 	struct device sc_dev;		/* generic device glue */
109 
110 	struct pcmcia_function *sc_pf;	/* our PCMCIA function */
111 	void *sc_ih;			/* interrupt handle */
112 
113 	const struct mhzc_product *sc_product;
114 
115 	/*
116 	 * Data for the Modem portion.
117 	 */
118 	struct device *sc_modem;
119 	struct pcmcia_io_handle sc_modem_pcioh;
120 	int sc_modem_io_window;
121 
122 	/*
123 	 * Data for the Ethernet portion.
124 	 */
125 	struct device *sc_ethernet;
126 	struct pcmcia_io_handle sc_ethernet_pcioh;
127 	int sc_ethernet_io_window;
128 
129 	int sc_flags;
130 };
131 
132 /* sc_flags */
133 #define	MHZC_MODEM_MAPPED	0x01
134 #define	MHZC_ETHERNET_MAPPED	0x02
135 #define	MHZC_MODEM_ENABLED	0x04
136 #define	MHZC_ETHERNET_ENABLED	0x08
137 #define	MHZC_IOSPACE_ALLOCED	0x10
138 
139 int	mhzc_match __P((struct device *, struct cfdata *, void *));
140 void	mhzc_attach __P((struct device *, struct device *, void *));
141 int	mhzc_detach __P((struct device *, int));
142 int	mhzc_activate __P((struct device *, enum devact));
143 
144 struct cfattach mhzc_ca = {
145 	sizeof(struct mhzc_softc), mhzc_match, mhzc_attach,
146 	    mhzc_detach, mhzc_activate
147 };
148 
149 int	mhzc_em3336_enaddr __P((struct mhzc_softc *, u_int8_t *));
150 int	mhzc_em3336_enable __P((struct mhzc_softc *));
151 
152 const struct mhzc_product {
153 	struct pcmcia_product mp_product;
154 
155 	/* Get the Ethernet address for this card. */
156 	int		(*mp_enaddr) __P((struct mhzc_softc *, u_int8_t *));
157 
158 	/* Perform any special `enable' magic. */
159 	int		(*mp_enable) __P((struct mhzc_softc *));
160 } mhzc_products[] = {
161 	{ { PCMCIA_STR_MEGAHERTZ_XJEM3336,	PCMCIA_VENDOR_MEGAHERTZ,
162 	    PCMCIA_PRODUCT_MEGAHERTZ_XJEM3336,	0 },
163 	  mhzc_em3336_enaddr,		mhzc_em3336_enable },
164 
165 	/*
166 	 * Eventually we could add support for other Ethernet/Modem
167 	 * combo cards, even if they're aren't Megahertz, because
168 	 * most of them work more or less the same way.
169 	 */
170 
171 	{ { NULL } }
172 };
173 
174 int	mhzc_print __P((void *, const char *));
175 
176 int	mhzc_check_cfe __P((struct mhzc_softc *, struct pcmcia_config_entry *));
177 int	mhzc_alloc_ethernet __P((struct mhzc_softc *, struct pcmcia_config_entry *));
178 
179 int	mhzc_enable __P((struct mhzc_softc *, int));
180 void	mhzc_disable __P((struct mhzc_softc *, int));
181 
182 int	mhzc_intr __P((void *));
183 
184 int
185 mhzc_match(parent, match, aux)
186 	struct device *parent;
187 	struct cfdata *match;
188 	void *aux;
189 {
190 	struct pcmcia_attach_args *pa = aux;
191 
192 	if (pcmcia_product_lookup(pa,
193 	    (const struct pcmcia_product *)mhzc_products,
194 	    sizeof mhzc_products[0], NULL) != NULL)
195 		return (10);		/* beat `com' */
196 
197 	return (0);
198 }
199 
200 void
201 mhzc_attach(parent, self, aux)
202 	struct device *parent, *self;
203 	void *aux;
204 {
205 	struct mhzc_softc *sc = (void *)self;
206 	struct pcmcia_attach_args *pa = aux;
207 	struct pcmcia_config_entry *cfe;
208 
209 	sc->sc_pf = pa->pf;
210 
211 	sc->sc_product = (const struct mhzc_product *)pcmcia_product_lookup(pa,
212             (const struct pcmcia_product *)mhzc_products,
213             sizeof mhzc_products[0], NULL);
214 	if (sc->sc_product == NULL) {
215 		printf("\n");
216 		panic("mhzc_attach: impossible");
217 	}
218 
219 	printf(": %s\n", sc->sc_product->mp_product.pp_name);
220 
221 	/*
222 	 * The address decoders on these cards are wacky.  The configuration
223 	 * entries are set up to look like serial ports, and have no
224 	 * information about the Ethernet portion.  In order to talk to
225 	 * the Modem portion, the I/O address must have bit 0x80 set.
226 	 * In order to talk to the Ethernet portion, the I/O address must
227 	 * have the 0x80 bit clear.
228 	 *
229 	 * The standard configuration entries conveniently have 0x80 set
230 	 * in them, and have a length of 8 (a 16550's size, convenient!),
231 	 * so we use those to set up the Modem portion.
232 	 *
233 	 * Once we have the Modem's address established, we search for
234 	 * an address suitable for the Ethernet portion.  We do this by
235 	 * rounding up to the next 16-byte aligned address where 0x80
236 	 * isn't set (the SMC Ethernet chip has a 16-byte address size)
237 	 * and attemping to allocate a 16-byte region until we succeed.
238 	 *
239 	 * Sure would have been nice if Megahertz had made the card a
240 	 * proper multi-function device.
241 	 */
242 	for (cfe = SIMPLEQ_FIRST(&pa->pf->cfe_head); cfe != NULL;
243 	     cfe = SIMPLEQ_NEXT(cfe, cfe_list)) {
244 		if (mhzc_check_cfe(sc, cfe)) {
245 			/* Found one! */
246 			break;
247 		}
248 	}
249 	if (cfe == NULL) {
250 		printf("%s: unable to find suitable config table entry\n",
251 		    sc->sc_dev.dv_xname);
252 		return;
253 	}
254 
255 	if (mhzc_alloc_ethernet(sc, cfe) == 0) {
256 		printf("%s: unable to allocate space for Ethernet portion\n",
257 		    sc->sc_dev.dv_xname);
258 		goto alloc_ethernet_failed;
259 	}
260 
261 	/* Enable the card. */
262 	pcmcia_function_init(pa->pf, cfe);
263 	if (pcmcia_function_enable(pa->pf)) {
264 		printf(": function enable failed\n");
265 		goto enable_failed;
266 	}
267 	sc->sc_flags |= MHZC_IOSPACE_ALLOCED;
268 
269 	if (sc->sc_product->mp_enable != NULL)
270 		(*sc->sc_product->mp_enable)(sc);
271 
272 	sc->sc_modem = config_found(&sc->sc_dev, "com", mhzc_print);
273 	sc->sc_ethernet = config_found(&sc->sc_dev, "sm", mhzc_print);
274 
275 	pcmcia_function_disable(pa->pf);
276 	return;
277 
278  enable_failed:
279 	/* Free the Ethernet's I/O space. */
280 	pcmcia_io_free(sc->sc_pf, &sc->sc_ethernet_pcioh);
281 
282  alloc_ethernet_failed:
283 	/* Free the Modem's I/O space. */
284 	pcmcia_io_free(sc->sc_pf, &sc->sc_modem_pcioh);
285 }
286 
287 int
288 mhzc_check_cfe(sc, cfe)
289 	struct mhzc_softc *sc;
290 	struct pcmcia_config_entry *cfe;
291 {
292 
293 	if (cfe->num_memspace != 0)
294 		return (0);
295 
296 	if (cfe->num_iospace != 1)
297 		return (0);
298 
299 	if (pcmcia_io_alloc(sc->sc_pf,
300 	    cfe->iospace[0].start,
301 	    cfe->iospace[0].length,
302 	    cfe->iospace[0].length,
303 	    &sc->sc_modem_pcioh) == 0) {
304 		/* Found one for the modem! */
305 		return (1);
306 	}
307 
308 	return (0);
309 }
310 
311 int
312 mhzc_alloc_ethernet(sc, cfe)
313 	struct mhzc_softc *sc;
314 	struct pcmcia_config_entry *cfe;
315 {
316 	bus_addr_t addr, maxaddr;
317 
318 	addr = cfe->iospace[0].start + cfe->iospace[0].length;
319 	maxaddr = 0x1000;
320 
321 	/*
322 	 * Now round it up so that it starts on a 16-byte boundary.
323 	 */
324 	addr = roundup(addr, 0x10);
325 
326 	for (; (addr + 0x10) < maxaddr; addr += 0x10) {
327 		if (addr & 0x80)
328 			continue;
329 		if (pcmcia_io_alloc(sc->sc_pf, addr, 0x10, 0x10,
330 		    &sc->sc_ethernet_pcioh) == 0) {
331 			/* Found one for the ethernet! */
332 			return (1);
333 		}
334 	}
335 
336 	return (0);
337 }
338 
339 int
340 mhzc_print(aux, pnp)
341 	void *aux;
342 	const char *pnp;
343 {
344 	const char *name = aux;
345 
346 	if (pnp)
347 		printf("%s at %s(*)",  name, pnp);
348 
349 	return (UNCONF);
350 }
351 
352 int
353 mhzc_detach(self, flags)
354 	struct device *self;
355 	int flags;
356 {
357 	struct mhzc_softc *sc = (void *)self;
358 	int rv;
359 
360 	if (sc->sc_ethernet != NULL) {
361 		rv = config_detach(sc->sc_ethernet, flags);
362 		if (rv != 0)
363 			return (rv);
364 		sc->sc_ethernet = NULL;
365 	}
366 
367 	if (sc->sc_modem != NULL) {
368 		rv = config_detach(sc->sc_modem, flags);
369 		if (rv != 0)
370 			return (rv);
371 #ifdef not_necessary
372 		sc->sc_modem = NULL;
373 #endif
374 	}
375 
376 	/* Unmap our i/o windows. */
377 	if (sc->sc_flags & MHZC_MODEM_MAPPED)
378 		pcmcia_io_unmap(sc->sc_pf, sc->sc_modem_io_window);
379 	if (sc->sc_flags & MHZC_ETHERNET_MAPPED)
380 		pcmcia_io_unmap(sc->sc_pf, sc->sc_ethernet_io_window);
381 
382 	/* Free our i/o spaces. */
383 	if (sc->sc_flags & MHZC_IOSPACE_ALLOCED) {
384 		pcmcia_io_free(sc->sc_pf, &sc->sc_modem_pcioh);
385 		pcmcia_io_free(sc->sc_pf, &sc->sc_ethernet_pcioh);
386 	}
387 
388 	return (0);
389 }
390 
391 int
392 mhzc_activate(self, act)
393 	struct device *self;
394 	enum devact act;
395 {
396 	struct mhzc_softc *sc = (void *)self;
397 	int s, rv = 0;
398 
399 	s = splhigh();
400 	switch (act) {
401 	case DVACT_ACTIVATE:
402 		rv = EOPNOTSUPP;
403 		break;
404 
405 	case DVACT_DEACTIVATE:
406 		if (sc->sc_ethernet != NULL) {
407 			rv = config_deactivate(sc->sc_ethernet);
408 			if (rv != 0)
409 				goto out;
410 		}
411 
412 		if (sc->sc_modem != NULL) {
413 			rv = config_deactivate(sc->sc_modem);
414 			if (rv != 0)
415 				goto out;
416 		}
417 		break;
418 	}
419  out:
420 	splx(s);
421 	return (rv);
422 }
423 
424 int
425 mhzc_intr(arg)
426 	void *arg;
427 {
428 	struct mhzc_softc *sc = arg;
429 	int rval = 0;
430 
431 #if NCOM_MHZC > 0
432 	if (sc->sc_modem != NULL &&
433 	    (sc->sc_flags & MHZC_MODEM_ENABLED) != 0)
434 		rval |= comintr(sc->sc_modem);
435 #endif
436 
437 #if NSM_MHZC > 0
438 	if (sc->sc_ethernet != NULL &&
439 	    (sc->sc_flags & MHZC_ETHERNET_ENABLED) != 0)
440 		rval |= smc91cxx_intr(sc->sc_ethernet);
441 #endif
442 
443 	return (rval);
444 }
445 
446 int
447 mhzc_enable(sc, flag)
448 	struct mhzc_softc *sc;
449 	int flag;
450 {
451 
452 	if (sc->sc_flags & flag) {
453 		printf("%s: %s already enabled\n", sc->sc_dev.dv_xname,
454 		    (flag & MHZC_MODEM_ENABLED) ? "modem" : "ethernet");
455 		panic("mhzc_enable");
456 	}
457 
458 	if ((sc->sc_flags & (MHZC_MODEM_ENABLED|MHZC_ETHERNET_ENABLED)) != 0) {
459 		sc->sc_flags |= flag;
460 		return (0);
461 	}
462 
463 	/*
464 	 * Establish our interrupt handler.
465 	 *
466 	 * XXX Note, we establish this at IPL_NET.  This is suboptimal
467 	 * XXX the Modem portion, but is necessary to make the Ethernet
468 	 * XXX portion have the correct interrupt level semantics.
469 	 *
470 	 * XXX Eventually we should use the `enabled' bits in the
471 	 * XXX flags word to determine which level we should be at.
472 	 */
473 	sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_NET,
474 	    mhzc_intr, sc);
475 	if (sc->sc_ih == NULL) {
476 		printf("%s: unable to establish interrupt\n",
477 		    sc->sc_dev.dv_xname);
478 		return (1);
479 	}
480 
481 	if (pcmcia_function_enable(sc->sc_pf)) {
482 		pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
483 		return (1);
484 	}
485 
486 	/*
487 	 * Perform any special enable magic necessary.
488 	 */
489 	if (sc->sc_product->mp_enable != NULL &&
490 	    (*sc->sc_product->mp_enable)(sc) != 0) {
491 		pcmcia_function_disable(sc->sc_pf);
492 		pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
493 		return (1);
494 	}
495 
496 	sc->sc_flags |= flag;
497 	return (0);
498 }
499 
500 void
501 mhzc_disable(sc, flag)
502 	struct mhzc_softc *sc;
503 	int flag;
504 {
505 
506 	if ((sc->sc_flags & flag) == 0) {
507 		printf("%s: %s already disabled\n", sc->sc_dev.dv_xname,
508 		    (flag & MHZC_MODEM_ENABLED) ? "modem" : "ethernet");
509 		panic("mhzc_disable");
510 	}
511 
512 	sc->sc_flags &= ~flag;
513 	if ((sc->sc_flags & (MHZC_MODEM_ENABLED|MHZC_ETHERNET_ENABLED)) != 0)
514 		return;
515 
516 	pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
517 	pcmcia_function_disable(sc->sc_pf);
518 }
519 
520 /*****************************************************************************
521  * Megahertz EM3336 (and compatibles) support
522  *****************************************************************************/
523 
524 int	mhzc_em3336_lannid_ciscallback __P((struct pcmcia_tuple *, void *));
525 int	mhzc_em3336_ascii_enaddr __P((const char *cisstr, u_int8_t *));
526 
527 int
528 mhzc_em3336_enaddr(sc, myla)
529 	struct mhzc_softc *sc;
530 	u_int8_t *myla;
531 {
532 
533 	/* Get the station address from CIS tuple 0x81. */
534 	if (pcmcia_scan_cis(sc->sc_dev.dv_parent,
535 	    mhzc_em3336_lannid_ciscallback, myla) != 1) {
536 		printf("%s: unable to get Ethernet address from CIS\n",
537 		    sc->sc_dev.dv_xname);
538 		return (0);
539 	}
540 
541 	return (1);
542 }
543 
544 int
545 mhzc_em3336_enable(sc)
546 	struct mhzc_softc *sc;
547 {
548 	struct pcmcia_mem_handle memh;
549 	bus_addr_t memoff;
550 	int memwin, reg;
551 
552 	/*
553 	 * Bring the chip to live by touching its registers in the correct
554 	 * way (as per my reference... the Linux smc91c92_cs.c driver by
555 	 * David A. Hinds).
556 	 */
557 
558 	/* Map the ISRPOWEREG. */
559 	if (pcmcia_mem_alloc(sc->sc_pf, 0x1000, &memh) != 0) {
560 		printf("%s: unable to allocate memory space\n",
561 		    sc->sc_dev.dv_xname);
562 		return (1);
563 	}
564 
565 	if (pcmcia_mem_map(sc->sc_pf, PCMCIA_MEM_ATTR, 0, 0x1000,
566 	    &memh, &memoff, &memwin)) {
567 		printf("%s: unable to map memory space\n",
568 		    sc->sc_dev.dv_xname);
569 		pcmcia_mem_free(sc->sc_pf, &memh);
570 		return (1);
571 	}
572 
573 	/*
574 	 * The magic sequence:
575 	 *
576 	 *	- read/write the CCR option register.
577 	 *	- read the ISRPOWEREG 2 times.
578 	 *	- read/write the CCR option register again.
579 	 */
580 
581 	reg = pcmcia_ccr_read(sc->sc_pf, PCMCIA_CCR_OPTION);
582 	pcmcia_ccr_write(sc->sc_pf, PCMCIA_CCR_OPTION, reg);
583 
584 	reg = bus_space_read_1(memh.memt, memh.memh, 0x380);
585 	delay(5);
586 	reg = bus_space_read_1(memh.memt, memh.memh, 0x380);
587 
588 	delay(200000);
589 
590 	reg = pcmcia_ccr_read(sc->sc_pf, PCMCIA_CCR_OPTION);
591 	delay(5);
592 	pcmcia_ccr_write(sc->sc_pf, PCMCIA_CCR_OPTION, reg);
593 
594 	pcmcia_mem_unmap(sc->sc_pf, memwin);
595 	pcmcia_mem_free(sc->sc_pf, &memh);
596 
597 	return (0);
598 }
599 
600 int
601 mhzc_em3336_lannid_ciscallback(tuple, arg)
602 	struct pcmcia_tuple *tuple;
603 	void *arg;
604 {
605 	u_int8_t *myla = arg, addr_str[ETHER_ADDR_LEN * 2];
606 	int i;
607 
608 	if (tuple->code == 0x81) {
609 		/*
610 		 * We have a string-encoded address.  Length includes
611 		 * terminating 0xff.
612 		 */
613 		if (tuple->length != (ETHER_ADDR_LEN * 2) + 1)
614 			return (0);
615 
616 		for (i = 0; i < tuple->length - 1; i++)
617 			addr_str[i] = pcmcia_tuple_read_1(tuple, i);
618 
619 		/*
620 		 * Decode the string into `myla'.
621 		 */
622 		return (mhzc_em3336_ascii_enaddr(addr_str, myla));
623 	}
624 	return (0);
625 }
626 
627 /* XXX This should be shared w/ if_sm_pcmcia.c */
628 int
629 mhzc_em3336_ascii_enaddr(cisstr, myla)
630 	const char *cisstr;
631 	u_int8_t *myla;
632 {
633 	u_int8_t digit;
634 	int i;
635 
636 	memset(myla, 0, ETHER_ADDR_LEN);
637 
638 	for (i = 0, digit = 0; i < (ETHER_ADDR_LEN * 2); i++) {
639 		if (cisstr[i] >= '0' && cisstr[i] <= '9')
640 			digit |= cisstr[i] - '0';
641 		else if (cisstr[i] >= 'a' && cisstr[i] <= 'f')
642 			digit |= (cisstr[i] - 'a') + 10;
643 		else if (cisstr[i] >= 'A' && cisstr[i] <= 'F')
644 			digit |= (cisstr[i] - 'A') + 10;
645 		else {
646 			/* Bogus digit!! */
647 			return (0);
648 		}
649 
650 		/* Compensate for ordering of digits. */
651 		if (i & 1) {
652 			myla[i >> 1] = digit;
653 			digit = 0;
654 		} else
655 			digit <<= 4;
656 	}
657 
658 	return (1);
659 }
660 
661 /****** Here begins the com attachment code. ******/
662 
663 #if NCOM_MHZC > 0
664 int	com_mhzc_match __P((struct device *, struct cfdata *, void *));
665 void	com_mhzc_attach __P((struct device *, struct device *, void *));
666 int	com_mhzc_detach __P((struct device *, int));
667 
668 /* No mhzc-specific goo in the softc; it's all in the parent. */
669 struct cfattach com_mhzc_ca = {
670 	sizeof(struct com_softc), com_mhzc_match, com_mhzc_attach,
671 	    com_detach, com_activate
672 };
673 
674 int	com_mhzc_enable __P((struct com_softc *));
675 void	com_mhzc_disable __P((struct com_softc *));
676 
677 int
678 com_mhzc_match(parent, match, aux)
679 	struct device *parent;
680 	struct cfdata *match;
681 	void *aux;
682 {
683 	extern struct cfdriver com_cd;
684 	const char *name = aux;
685 
686 	/* Device is always present. */
687 	if (strcmp(name, com_cd.cd_name) == 0)
688 		return (1);
689 
690 	return (0);
691 }
692 
693 void
694 com_mhzc_attach(parent, self, aux)
695 	struct device *parent, *self;
696 	void *aux;
697 {
698 	struct com_softc *sc = (void *)self;
699 	struct mhzc_softc *msc = (void *)parent;
700 
701 	printf(":");
702 	if (pcmcia_io_map(msc->sc_pf, PCMCIA_WIDTH_IO8, 0,
703 	    msc->sc_modem_pcioh.size, &msc->sc_modem_pcioh,
704 	    &msc->sc_modem_io_window)) {
705 		printf("unable to map I/O space\n");
706 		return;
707 	}
708 	printf(" io 0x%x-0x%x",
709 	    (int)msc->sc_modem_pcioh.addr,
710 	    (int)(msc->sc_modem_pcioh.addr + msc->sc_modem_pcioh.size - 1));
711 
712 	msc->sc_flags |= MHZC_MODEM_MAPPED;
713 
714 	sc->sc_iot = msc->sc_modem_pcioh.iot;
715 	sc->sc_ioh = msc->sc_modem_pcioh.ioh;
716 
717 	sc->enabled = 1;
718 
719 	sc->sc_iobase = -1;
720 	sc->sc_frequency = COM_FREQ;
721 
722 	sc->enable = com_mhzc_enable;
723 	sc->disable = com_mhzc_disable;
724 
725 	com_attach_subr(sc);
726 
727 	sc->enabled = 0;
728 }
729 
730 int
731 com_mhzc_enable(sc)
732 	struct com_softc *sc;
733 {
734 
735 	return (mhzc_enable((struct mhzc_softc *)sc->sc_dev.dv_parent,
736 	    MHZC_MODEM_ENABLED));
737 }
738 
739 void
740 com_mhzc_disable(sc)
741 	struct com_softc *sc;
742 {
743 
744 	mhzc_disable((struct mhzc_softc *)sc->sc_dev.dv_parent,
745 	    MHZC_MODEM_ENABLED);
746 }
747 
748 #endif /* NCOM_MHZC > 0 */
749 
750 /****** Here begins the sm attachment code. ******/
751 
752 #if NSM_MHZC > 0
753 int	sm_mhzc_match __P((struct device *, struct cfdata *, void *));
754 void	sm_mhzc_attach __P((struct device *, struct device *, void *));
755 
756 /* No mhzc-specific goo in the softc; it's all in the parent. */
757 struct cfattach sm_mhzc_ca = {
758 	sizeof(struct smc91cxx_softc), sm_mhzc_match, sm_mhzc_attach,
759 	    smc91cxx_detach, smc91cxx_activate
760 };
761 
762 int	sm_mhzc_enable __P((struct smc91cxx_softc *));
763 void	sm_mhzc_disable __P((struct smc91cxx_softc *));
764 
765 int
766 sm_mhzc_match(parent, match, aux)
767 	struct device *parent;
768 	struct cfdata *match;
769 	void *aux;
770 {
771 	extern struct cfdriver sm_cd;
772 	const char *name = aux;
773 
774 	/* Device is always present. */
775 	if (strcmp(name, sm_cd.cd_name) == 0)
776 		return (1);
777 
778 	return (0);
779 }
780 
781 void
782 sm_mhzc_attach(parent, self, aux)
783 	struct device *parent, *self;
784 	void *aux;
785 {
786 	struct smc91cxx_softc *sc = (void *)self;
787 	struct mhzc_softc *msc = (void *)parent;
788 	u_int8_t myla[ETHER_ADDR_LEN];
789 
790 	printf(":");
791 	if (pcmcia_io_map(msc->sc_pf, PCMCIA_WIDTH_IO16, 0,
792 	    msc->sc_ethernet_pcioh.size, &msc->sc_ethernet_pcioh,
793 	    &msc->sc_ethernet_io_window)) {
794 		printf("unable to map I/O space\n");
795 		return;
796 	}
797 	printf(" io 0x%x-0x%x\n",
798 	   (int)msc->sc_ethernet_pcioh.addr,
799 	   (int)(msc->sc_ethernet_pcioh.addr + msc->sc_modem_pcioh.size - 1));
800 
801 	msc->sc_flags |= MHZC_ETHERNET_MAPPED;
802 
803 	sc->sc_bst = msc->sc_ethernet_pcioh.iot;
804 	sc->sc_bsh = msc->sc_ethernet_pcioh.ioh;
805 
806 	sc->sc_enable = sm_mhzc_enable;
807 	sc->sc_disable = sm_mhzc_disable;
808 
809 	if ((*msc->sc_product->mp_enaddr)(msc, myla) != 1)
810 		return;
811 
812 	/* Perform generic initialization. */
813 	smc91cxx_attach(sc, myla);
814 }
815 
816 int
817 sm_mhzc_enable(sc)
818 	struct smc91cxx_softc *sc;
819 {
820 
821 	return (mhzc_enable((struct mhzc_softc *)sc->sc_dev.dv_parent,
822 	    MHZC_ETHERNET_ENABLED));
823 }
824 
825 void
826 sm_mhzc_disable(sc)
827 	struct smc91cxx_softc *sc;
828 {
829 
830 	mhzc_disable((struct mhzc_softc *)sc->sc_dev.dv_parent,
831 	    MHZC_ETHERNET_ENABLED);
832 }
833 
834 #endif /* NSM_MHZC > 0 */
835