xref: /netbsd-src/sys/dev/cardbus/if_tlp_cardbus.c (revision 7788a0781fe6ff2cce37368b4578a7ade0850cb1) 
1 /*	$NetBSD: if_tlp_cardbus.c,v 1.70 2011/08/01 11:20:27 drochner 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  *
20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 /*
34  * CardBus bus front-end for the Digital Semiconductor ``Tulip'' (21x4x)
35  * Ethernet controller family driver.
36  */
37 
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: if_tlp_cardbus.c,v 1.70 2011/08/01 11:20:27 drochner Exp $");
40 
41 #include "opt_inet.h"
42 
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/mbuf.h>
46 #include <sys/malloc.h>
47 #include <sys/kernel.h>
48 #include <sys/socket.h>
49 #include <sys/ioctl.h>
50 #include <sys/errno.h>
51 #include <sys/device.h>
52 
53 #include <machine/endian.h>
54 
55 #include <net/if.h>
56 #include <net/if_dl.h>
57 #include <net/if_media.h>
58 #include <net/if_ether.h>
59 
60 #ifdef INET
61 #include <netinet/in.h>
62 #include <netinet/if_inarp.h>
63 #endif
64 
65 
66 #include <sys/bus.h>
67 #include <sys/intr.h>
68 
69 #include <dev/mii/miivar.h>
70 #include <dev/mii/mii_bitbang.h>
71 
72 #include <dev/ic/tulipreg.h>
73 #include <dev/ic/tulipvar.h>
74 
75 #include <dev/pci/pcivar.h>
76 #include <dev/pci/pcireg.h>
77 #include <dev/pci/pcidevs.h>
78 
79 #include <dev/cardbus/cardbusvar.h>
80 #include <dev/pci/pcidevs.h>
81 
82 /*
83  * PCI configuration space registers used by the Tulip.
84  */
85 #define TULIP_PCI_IOBA PCI_BAR(0)	/* i/o mapped base */
86 #define TULIP_PCI_MMBA PCI_BAR(1)	/* memory mapped base */
87 #define	TULIP_PCI_CFDA		0x40	/* configuration driver area */
88 
89 #define	CFDA_SLEEP		0x80000000	/* sleep mode */
90 #define	CFDA_SNOOZE		0x40000000	/* snooze mode */
91 
92 struct tulip_cardbus_softc {
93 	struct tulip_softc sc_tulip;	/* real Tulip softc */
94 
95 	/* CardBus-specific goo. */
96 	void	*sc_ih;			/* interrupt handle */
97 	cardbus_devfunc_t sc_ct;	/* our CardBus devfuncs */
98 	pcitag_t sc_tag;		/* our CardBus tag */
99 	pcireg_t sc_csr;
100 	bus_size_t sc_mapsize;		/* the size of mapped bus space
101 					   region */
102 
103 	int	sc_bar_reg;		/* which BAR to use */
104 	pcireg_t sc_bar_val;		/* value of the BAR */
105 };
106 
107 int	tlp_cardbus_match(device_t, cfdata_t, void *);
108 void	tlp_cardbus_attach(device_t, device_t, void *);
109 int	tlp_cardbus_detach(device_t, int);
110 
111 CFATTACH_DECL_NEW(tlp_cardbus, sizeof(struct tulip_cardbus_softc),
112     tlp_cardbus_match, tlp_cardbus_attach, tlp_cardbus_detach, tlp_activate);
113 
114 const struct tulip_cardbus_product {
115 	u_int32_t	tcp_vendor;	/* PCI vendor ID */
116 	u_int32_t	tcp_product;	/* PCI product ID */
117 	tulip_chip_t	tcp_chip;	/* base Tulip chip type */
118 } tlp_cardbus_products[] = {
119 	{ PCI_VENDOR_DEC,	PCI_PRODUCT_DEC_21142,
120 	  TULIP_CHIP_21142 },
121 
122 	{ PCI_VENDOR_XIRCOM,	PCI_PRODUCT_XIRCOM_X3201_3_21143,
123 	  TULIP_CHIP_X3201_3 },
124 
125 	{ PCI_VENDOR_ADMTEK,	PCI_PRODUCT_ADMTEK_AN983,
126 	  TULIP_CHIP_AN985 },
127 
128 	{ PCI_VENDOR_ACCTON,	PCI_PRODUCT_ACCTON_EN2242,
129 	  TULIP_CHIP_AN985 },
130 
131 	{ PCI_VENDOR_ABOCOM,	PCI_PRODUCT_ABOCOM_FE2500,
132 	  TULIP_CHIP_AN985 },
133 
134 	{ PCI_VENDOR_ABOCOM,	PCI_PRODUCT_ABOCOM_PCM200,
135 	  TULIP_CHIP_AN985 },
136 
137 	{ PCI_VENDOR_ABOCOM,	PCI_PRODUCT_ABOCOM_FE2500MX,
138 	  TULIP_CHIP_AN985 },
139 
140 	{ PCI_VENDOR_HAWKING,	PCI_PRODUCT_HAWKING_PN672TX,
141 	  TULIP_CHIP_AN985 },
142 
143 	{ PCI_VENDOR_ADMTEK,	PCI_PRODUCT_ADMTEK_AN985,
144 	  TULIP_CHIP_AN985 },
145 
146 	{ PCI_VENDOR_MICROSOFT,	PCI_PRODUCT_MICROSOFT_MN120,
147 	  TULIP_CHIP_AN985 },
148 
149 	{ PCI_VENDOR_LINKSYS, PCI_PRODUCT_LINKSYS_PCMPC200,
150 	  TULIP_CHIP_AN985 },
151 
152 	{ 0,				0,
153 	  TULIP_CHIP_INVALID },
154 };
155 
156 struct tlp_cardbus_quirks {
157 	void		(*tpq_func)(struct tulip_cardbus_softc *,
158 			    const u_int8_t *);
159 	u_int8_t	tpq_oui[3];
160 };
161 
162 void	tlp_cardbus_lxt_quirks(struct tulip_cardbus_softc *,
163 	    const u_int8_t *);
164 
165 const struct tlp_cardbus_quirks tlp_cardbus_21142_quirks[] = {
166 	{ tlp_cardbus_lxt_quirks,	{ 0x00, 0x40, 0x05 } },
167 	{ NULL,				{ 0, 0, 0 } }
168 };
169 
170 void	tlp_cardbus_setup(struct tulip_cardbus_softc *);
171 
172 int	tlp_cardbus_enable(struct tulip_softc *);
173 void	tlp_cardbus_disable(struct tulip_softc *);
174 void	tlp_cardbus_power(struct tulip_softc *, int);
175 
176 void	tlp_cardbus_x3201_reset(struct tulip_softc *);
177 
178 const struct tulip_cardbus_product *tlp_cardbus_lookup
179    (const struct cardbus_attach_args *);
180 void tlp_cardbus_get_quirks(struct tulip_cardbus_softc *,
181     const u_int8_t *, const struct tlp_cardbus_quirks *);
182 
183 const struct tulip_cardbus_product *
184 tlp_cardbus_lookup(const struct cardbus_attach_args *ca)
185 {
186 	const struct tulip_cardbus_product *tcp;
187 
188 	for (tcp = tlp_cardbus_products; tcp->tcp_chip != TULIP_CHIP_INVALID;
189 	     tcp++) {
190 		if (PCI_VENDOR(ca->ca_id) == tcp->tcp_vendor &&
191 		    PCI_PRODUCT(ca->ca_id) == tcp->tcp_product)
192 			return (tcp);
193 	}
194 	return (NULL);
195 }
196 
197 void
198 tlp_cardbus_get_quirks(struct tulip_cardbus_softc *csc, const u_int8_t *enaddr, const struct tlp_cardbus_quirks *tpq)
199 {
200 
201 	for (; tpq->tpq_func != NULL; tpq++) {
202 		if (tpq->tpq_oui[0] == enaddr[0] &&
203 		    tpq->tpq_oui[1] == enaddr[1] &&
204 		    tpq->tpq_oui[2] == enaddr[2]) {
205 			(*tpq->tpq_func)(csc, enaddr);
206 			return;
207 		}
208 	}
209 }
210 
211 int
212 tlp_cardbus_match(device_t parent, cfdata_t match,
213     void *aux)
214 {
215 	struct cardbus_attach_args *ca = aux;
216 
217 	if (tlp_cardbus_lookup(ca) != NULL)
218 		return (1);
219 
220 	return (0);
221 }
222 
223 void
224 tlp_cardbus_attach(device_t parent, device_t self,
225     void *aux)
226 {
227 	struct tulip_cardbus_softc *csc = device_private(self);
228 	struct tulip_softc *sc = &csc->sc_tulip;
229 	struct cardbus_attach_args *ca = aux;
230 	cardbus_devfunc_t ct = ca->ca_ct;
231 	const struct tulip_cardbus_product *tcp;
232 	u_int8_t enaddr[ETHER_ADDR_LEN];
233 	bus_addr_t adr;
234 	pcireg_t reg;
235 
236 	sc->sc_dev = self;
237 	sc->sc_devno = 0;
238 	sc->sc_dmat = ca->ca_dmat;
239 	csc->sc_ct = ct;
240 	csc->sc_tag = ca->ca_tag;
241 
242 	tcp = tlp_cardbus_lookup(ca);
243 	if (tcp == NULL) {
244 		printf("\n");
245 		panic("tlp_cardbus_attach: impossible");
246 	}
247 	sc->sc_chip = tcp->tcp_chip;
248 
249 	/*
250 	 * By default, Tulip registers are 8 bytes long (4 bytes
251 	 * followed by a 4 byte pad).
252 	 */
253 	sc->sc_regshift = 3;
254 
255 	/*
256 	 * Power management hooks.
257 	 */
258 	sc->sc_enable = tlp_cardbus_enable;
259 	sc->sc_disable = tlp_cardbus_disable;
260 	sc->sc_power = tlp_cardbus_power;
261 
262 	/*
263 	 * Get revision info, and set some chip-specific variables.
264 	 */
265 	sc->sc_rev = PCI_REVISION(ca->ca_class);
266 	switch (sc->sc_chip) {
267 	case TULIP_CHIP_21142:
268 		if (sc->sc_rev >= 0x20)
269 			sc->sc_chip = TULIP_CHIP_21143;
270 		break;
271 
272 	case TULIP_CHIP_AN985:
273 		/*
274 		 * The AN983 and AN985 are very similar, and are
275 		 * differentiated by a "signature" register that
276 		 * is like, but not identical, to a PCI ID register.
277 		 */
278 		reg = Cardbus_conf_read(ct, csc->sc_tag, 0x80);
279 		switch (reg) {
280 		case 0x09811317:
281 			sc->sc_chip = TULIP_CHIP_AN985;
282 			break;
283 
284 		case 0x09851317:
285 			sc->sc_chip = TULIP_CHIP_AN983;
286 			break;
287 
288 		}
289 		break;
290 
291 	default:
292 		/* Nothing. -- to make gcc happy */
293 		break;
294 	}
295 
296 	printf(": %s Ethernet, pass %d.%d\n",
297 	    tlp_chip_name(sc->sc_chip),
298 	    (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
299 
300 	/*
301 	 * Map the device.
302 	 */
303 	csc->sc_csr = PCI_COMMAND_MASTER_ENABLE;
304 	if (Cardbus_mapreg_map(ct, TULIP_PCI_MMBA,
305 	    PCI_MAPREG_TYPE_MEM, 0, &sc->sc_st, &sc->sc_sh, &adr,
306 	    &csc->sc_mapsize) == 0) {
307 		csc->sc_csr |= PCI_COMMAND_MEM_ENABLE;
308 		csc->sc_bar_reg = TULIP_PCI_MMBA;
309 		csc->sc_bar_val = adr | PCI_MAPREG_TYPE_MEM;
310 	} else if (Cardbus_mapreg_map(ct, TULIP_PCI_IOBA,
311 	    PCI_MAPREG_TYPE_IO, 0, &sc->sc_st, &sc->sc_sh, &adr,
312 	    &csc->sc_mapsize) == 0) {
313 		csc->sc_csr |= PCI_COMMAND_IO_ENABLE;
314 		csc->sc_bar_reg = TULIP_PCI_IOBA;
315 		csc->sc_bar_val = adr | PCI_MAPREG_TYPE_IO;
316 	} else {
317 		aprint_error_dev(self, "unable to map device registers\n");
318 		return;
319 	}
320 
321 	/*
322 	 * Bring the chip out of powersave mode and initialize the
323 	 * configuration registers.
324 	 */
325 	tlp_cardbus_setup(csc);
326 
327 	/*
328 	 * Read the contents of the Ethernet Address ROM/SROM.
329 	 */
330 	switch (sc->sc_chip) {
331 	case TULIP_CHIP_X3201_3:
332 		/*
333 		 * No SROM on this chip.
334 		 */
335 		break;
336 
337 	default:
338 		if (tlp_read_srom(sc) == 0)
339 			goto cant_cope;
340 		break;
341 	}
342 
343 	/*
344 	 * Deal with chip/board quirks.  This includes setting up
345 	 * the mediasw, and extracting the Ethernet address from
346 	 * the rombuf.
347 	 */
348 	switch (sc->sc_chip) {
349 	case TULIP_CHIP_21142:
350 	case TULIP_CHIP_21143:
351 		/* Check for new format SROM. */
352 		if (tlp_isv_srom_enaddr(sc, enaddr) != 0) {
353 			/*
354 			 * We start out with the 2114x ISV media switch.
355 			 * When we search for quirks, we may change to
356 			 * a different switch.
357 			 */
358 			sc->sc_mediasw = &tlp_2114x_isv_mediasw;
359 		} else if (tlp_parse_old_srom(sc, enaddr) == 0) {
360 			/*
361 			 * Not an ISV SROM, and not in old DEC Address
362 			 * ROM format.  Try to snarf it out of the CIS.
363 			 */
364 			if (ca->ca_cis.funce.network.netid_present == 0)
365 				goto cant_cope;
366 
367 			/* Grab the MAC address from the CIS. */
368 			memcpy(enaddr, ca->ca_cis.funce.network.netid,
369 			    sizeof(enaddr));
370 		}
371 
372 		/*
373 		 * Deal with any quirks this board might have.
374 		 */
375 		tlp_cardbus_get_quirks(csc, enaddr, tlp_cardbus_21142_quirks);
376 
377 		/*
378 		 * If we don't already have a media switch, default to
379 		 * MII-over-SIO, with no special reset routine.
380 		 */
381 		if (sc->sc_mediasw == NULL) {
382 			printf("%s: defaulting to MII-over-SIO; no bets...\n",
383 			    device_xname(self));
384 			sc->sc_mediasw = &tlp_sio_mii_mediasw;
385 		}
386 		break;
387 
388 	case TULIP_CHIP_AN983:
389 	case TULIP_CHIP_AN985:
390 		/*
391 		 * The ADMtek AN985's Ethernet address is located
392 		 * at offset 8 of its EEPROM.
393 		 */
394 		memcpy(enaddr, &sc->sc_srom[8], ETHER_ADDR_LEN);
395 
396 		/*
397 		 * The ADMtek AN985 can be configured in Single-Chip
398 		 * mode or MAC-only mode.  Single-Chip uses the built-in
399 		 * PHY, MAC-only has an external PHY (usually HomePNA).
400 		 * The selection is based on an EEPROM setting, and both
401 		 * PHYs are access via MII attached to SIO.
402 		 *
403 		 * The AN985 "ghosts" the internal PHY onto all
404 		 * MII addresses, so we have to use a media init
405 		 * routine that limits the search.
406 		 * XXX How does this work with MAC-only mode?
407 		 */
408 		sc->sc_mediasw = &tlp_an985_mediasw;
409 		break;
410 
411 	case TULIP_CHIP_X3201_3:
412 		/*
413 		 * The X3201 doesn't have an SROM.  Lift the MAC address
414 		 * from the CIS.  Also, we have a special media switch:
415 		 * MII-on-SIO, plus some special GPIO setup.
416 		 */
417 		memcpy(enaddr, ca->ca_cis.funce.network.netid, sizeof(enaddr));
418 		sc->sc_reset = tlp_cardbus_x3201_reset;
419 		sc->sc_mediasw = &tlp_sio_mii_mediasw;
420 		break;
421 
422 	default:
423  cant_cope:
424 		printf("%s: sorry, unable to handle your board\n",
425 		    device_xname(self));
426 		return;
427 	}
428 
429 	/*
430 	 * Finish off the attach.
431 	 */
432 	tlp_attach(sc, enaddr);
433 
434 	/*
435 	 * Power down the socket.
436 	 */
437 	Cardbus_function_disable(csc->sc_ct);
438 }
439 
440 int
441 tlp_cardbus_detach(device_t self, int flags)
442 {
443 	struct tulip_cardbus_softc *csc = device_private(self);
444 	struct tulip_softc *sc = &csc->sc_tulip;
445 	struct cardbus_devfunc *ct = csc->sc_ct;
446 	int rv;
447 
448 #if defined(DIAGNOSTIC)
449 	if (ct == NULL)
450 		panic("%s: data structure lacks", device_xname(self));
451 #endif
452 
453 	rv = tlp_detach(sc);
454 	if (rv)
455 		return (rv);
456 
457 	/*
458 	 * Unhook the interrupt handler.
459 	 */
460 	if (csc->sc_ih != NULL)
461 		Cardbus_intr_disestablish(ct, csc->sc_ih);
462 
463 	/*
464 	 * Release bus space and close window.
465 	 */
466 	if (csc->sc_bar_reg != 0)
467 		Cardbus_mapreg_unmap(ct, csc->sc_bar_reg,
468 		    sc->sc_st, sc->sc_sh, csc->sc_mapsize);
469 
470 	return (0);
471 }
472 
473 int
474 tlp_cardbus_enable(struct tulip_softc *sc)
475 {
476 	struct tulip_cardbus_softc *csc = (void *) sc;
477 	cardbus_devfunc_t ct = csc->sc_ct;
478 
479 	/*
480 	 * Power on the socket.
481 	 */
482 	Cardbus_function_enable(ct);
483 
484 	/*
485 	 * Set up the PCI configuration registers.
486 	 */
487 	tlp_cardbus_setup(csc);
488 
489 	/*
490 	 * Map and establish the interrupt.
491 	 */
492 	csc->sc_ih = Cardbus_intr_establish(ct, IPL_NET, tlp_intr, sc);
493 	if (csc->sc_ih == NULL) {
494 		aprint_error_dev(sc->sc_dev,
495 				 "unable to establish interrupt\n");
496 		Cardbus_function_disable(csc->sc_ct);
497 		return (1);
498 	}
499 	return (0);
500 }
501 
502 void
503 tlp_cardbus_disable(struct tulip_softc *sc)
504 {
505 	struct tulip_cardbus_softc *csc = (void *) sc;
506 	cardbus_devfunc_t ct = csc->sc_ct;
507 
508 	/* Unhook the interrupt handler. */
509 	Cardbus_intr_disestablish(ct, csc->sc_ih);
510 	csc->sc_ih = NULL;
511 
512 	/* Power down the socket. */
513 	Cardbus_function_disable(ct);
514 }
515 
516 void
517 tlp_cardbus_power(struct tulip_softc *sc, int why)
518 {
519 
520 	switch (why) {
521 	case PWR_RESUME:
522 		tlp_cardbus_enable(sc);
523 		break;
524 	case PWR_SUSPEND:
525 		tlp_cardbus_disable(sc);
526 		break;
527 	}
528 }
529 
530 void
531 tlp_cardbus_setup(struct tulip_cardbus_softc *csc)
532 {
533 	struct tulip_softc *sc = &csc->sc_tulip;
534 	cardbus_devfunc_t ct = csc->sc_ct;
535 	pcireg_t reg;
536 
537 	/*
538 	 * Check to see if the device is in power-save mode, and
539 	 * bring it out if necessary.
540 	 */
541 	switch (sc->sc_chip) {
542 	case TULIP_CHIP_21142:
543 	case TULIP_CHIP_21143:
544 	case TULIP_CHIP_X3201_3:
545 		/*
546 		 * Clear the "sleep mode" bit in the CFDA register.
547 		 */
548 		reg = Cardbus_conf_read(ct, csc->sc_tag, TULIP_PCI_CFDA);
549 		if (reg & (CFDA_SLEEP|CFDA_SNOOZE))
550 			Cardbus_conf_write(ct, csc->sc_tag, TULIP_PCI_CFDA,
551 			    reg & ~(CFDA_SLEEP|CFDA_SNOOZE));
552 		break;
553 
554 	default:
555 		/* Nothing. -- to make gcc happy */
556 		break;
557 	}
558 
559 	(void)cardbus_set_powerstate(ct, csc->sc_tag, PCI_PWR_D0);
560 
561 	/* Program the BAR. */
562 	Cardbus_conf_write(ct, csc->sc_tag, csc->sc_bar_reg, csc->sc_bar_val);
563 
564 	/* Enable the appropriate bits in the PCI CSR. */
565 	reg = Cardbus_conf_read(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG);
566 	reg &= ~(PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE);
567 	reg |= csc->sc_csr;
568 	Cardbus_conf_write(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG, reg);
569 
570 	/*
571 	 * Make sure the latency timer is set to some reasonable
572 	 * value.
573 	 */
574 	reg = Cardbus_conf_read(ct, csc->sc_tag, PCI_BHLC_REG);
575 	if (PCI_LATTIMER(reg) < 0x20) {
576 		reg &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT);
577 		reg |= (0x20 << PCI_LATTIMER_SHIFT);
578 		Cardbus_conf_write(ct, csc->sc_tag, PCI_BHLC_REG, reg);
579 	}
580 }
581 
582 void
583 tlp_cardbus_x3201_reset(struct tulip_softc *sc)
584 {
585 	u_int32_t reg;
586 
587 	reg = TULIP_READ(sc, CSR_SIAGEN);
588 
589 	/* make GP[2,0] outputs */
590 	TULIP_WRITE(sc, CSR_SIAGEN, (reg & ~SIAGEN_MD) | SIAGEN_CWE |
591 	    0x00050000);
592 	TULIP_WRITE(sc, CSR_SIAGEN, (reg & ~SIAGEN_CWE) | SIAGEN_MD);
593 }
594 
595 void
596 tlp_cardbus_lxt_quirks(struct tulip_cardbus_softc *csc,
597     const u_int8_t *enaddr)
598 {
599 	struct tulip_softc *sc = &csc->sc_tulip;
600 
601 	sc->sc_mediasw = &tlp_sio_mii_mediasw;
602 }
603