FreeBSD/Linux Kernel Cross Reference
sys/dev/xe/if_xe.c
1 /*-
2 * Copyright (c) 1998, 1999 Scott Mitchell
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 * $Id: if_xe.c,v 1.20 1999/06/13 19:17:40 scott Exp $
27 * $FreeBSD$
28 */
29
30 /*
31 * XXX TODO XXX
32 *
33 * I've pushed this fairly far, but there are some things that need to be
34 * done here. I'm documenting them here in case I get destracted. -- imp
35 *
36 * xe_cem56fix -- need to figure out how to map the extra stuff.
37 */
38
39 /*
40 * Portions of this software were derived from Werner Koch's xirc2ps driver
41 * for Linux under the terms of the following license (from v1.30 of the
42 * xirc2ps driver):
43 *
44 * Copyright (c) 1997 by Werner Koch (dd9jn)
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, and the entire permission notice in its entirety,
51 * including the disclaimer of warranties.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. The name of the author may not be used to endorse or promote
56 * products derived from this software without specific prior
57 * written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
62 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
67 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
68 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
69 * OF THE POSSIBILITY OF SUCH DAMAGE.
70 */
71
72 /*
73 * FreeBSD device driver for Xircom CreditCard PCMCIA Ethernet adapters. The
74 * following cards are currently known to work with the driver:
75 * Xircom CreditCard 10/100 (CE3)
76 * Xircom CreditCard Ethernet + Modem 28 (CEM28)
77 * Xircom CreditCard Ethernet 10/100 + Modem 56 (CEM56)
78 * Xircom RealPort Ethernet 10
79 * Xircom RealPort Ethernet 10/100
80 * Xircom RealPort Ethernet 10/100 + Modem 56 (REM56, REM56G)
81 * Intel EtherExpress Pro/100 PC Card Mobile Adapter 16 (Pro/100 M16A)
82 * Compaq Netelligent 10/100 PC Card (CPQ-10/100)
83 *
84 * Some other cards *should* work, but support for them is either broken or in
85 * an unknown state at the moment. I'm always interested in hearing from
86 * people who own any of these cards:
87 * Xircom CreditCard 10Base-T (PS-CE2-10)
88 * Xircom CreditCard Ethernet + ModemII (CEM2)
89 * Xircom CEM28 and CEM33 Ethernet/Modem cards (may be variants of CEM2?)
90 *
91 * Thanks to all who assisted with the development and testing of the driver,
92 * especially: Werner Koch, Duke Kamstra, Duncan Barclay, Jason George, Dru
93 * Nelson, Mike Kephart, Bill Rainey and Douglas Rand. Apologies if I've left
94 * out anyone who deserves a mention here.
95 *
96 * Special thanks to Ade Lovett for both hosting the mailing list and doing
97 * the CEM56/REM56 support code; and the FreeBSD UK Users' Group for hosting
98 * the web pages.
99 *
100 * Contact points:
101 *
102 * Driver web page: http://ukug.uk.freebsd.org/~scott/xe_drv/
103 *
104 * Mailing list: http://www.lovett.com/lists/freebsd-xircom/
105 * or send "subscribe freebsd-xircom" to <majordomo@lovett.com>
106 *
107 * Author email: <scott@uk.freebsd.org>
108 */
109
110
111 #include <sys/param.h>
112 #include <sys/cdefs.h>
113 #include <sys/errno.h>
114 #include <sys/kernel.h>
115 #include <sys/mbuf.h>
116 #include <sys/select.h>
117 #include <sys/socket.h>
118 #include <sys/sockio.h>
119 #include <sys/systm.h>
120 #include <sys/uio.h>
121
122 #include <sys/module.h>
123 #include <sys/bus.h>
124
125 #include <machine/bus.h>
126 #include <machine/resource.h>
127 #include <sys/rman.h>
128
129 #include <net/ethernet.h>
130 #include <net/if.h>
131 #include <net/if_arp.h>
132 #include <net/if_dl.h>
133 #include <net/if_media.h>
134 #include <net/if_mib.h>
135 #include <net/bpf.h>
136
137 #include <dev/pccard/pccardvar.h>
138 #include "card_if.h"
139
140 #include <dev/xe/if_xereg.h>
141 #include <dev/xe/if_xevar.h>
142
143 #include <machine/clock.h>
144
145 /*
146 * MII command structure
147 */
148 struct xe_mii_frame {
149 u_int8_t mii_stdelim;
150 u_int8_t mii_opcode;
151 u_int8_t mii_phyaddr;
152 u_int8_t mii_regaddr;
153 u_int8_t mii_turnaround;
154 u_int16_t mii_data;
155 };
156
157 /*
158 * Media autonegotiation progress constants
159 */
160 #define XE_AUTONEG_NONE 0 /* No autonegotiation in progress */
161 #define XE_AUTONEG_WAITING 1 /* Waiting for transmitter to go idle */
162 #define XE_AUTONEG_STARTED 2 /* Waiting for autonegotiation to complete */
163 #define XE_AUTONEG_100TX 3 /* Trying to force 100baseTX link */
164 #define XE_AUTONEG_FAIL 4 /* Autonegotiation failed */
165
166
167 /*
168 * Prototypes start here
169 */
170 static int xe_probe (device_t dev);
171 static int xe_attach (device_t dev);
172 static int xe_detach (device_t dev);
173 static int xe_activate (device_t dev);
174 static void xe_deactivate (device_t dev);
175 static void xe_init (void *xscp);
176 static void xe_start (struct ifnet *ifp);
177 static int xe_ioctl (struct ifnet *ifp, u_long command, caddr_t data);
178 static void xe_watchdog (struct ifnet *ifp);
179 static int xe_media_change (struct ifnet *ifp);
180 static void xe_media_status (struct ifnet *ifp, struct ifmediareq *mrp);
181 static timeout_t xe_setmedia;
182 static void xe_hard_reset (struct xe_softc *scp);
183 static void xe_soft_reset (struct xe_softc *scp);
184 static void xe_stop (struct xe_softc *scp);
185 static void xe_enable_intr (struct xe_softc *scp);
186 static void xe_disable_intr (struct xe_softc *scp);
187 static void xe_setmulti (struct xe_softc *scp);
188 static void xe_setaddrs (struct xe_softc *scp);
189 static int xe_pio_write_packet (struct xe_softc *scp, struct mbuf *mbp);
190 static u_int32_t xe_compute_crc (u_int8_t *data, int len);
191 static int xe_compute_hashbit (u_int32_t crc);
192
193 /*
194 * MII functions
195 */
196 static void xe_mii_sync (struct xe_softc *scp);
197 static int xe_mii_init (struct xe_softc *scp);
198 static void xe_mii_send (struct xe_softc *scp, u_int32_t bits, int cnt);
199 static int xe_mii_readreg (struct xe_softc *scp, struct xe_mii_frame *frame);
200 static int xe_mii_writereg (struct xe_softc *scp, struct xe_mii_frame *frame);
201 static u_int16_t xe_phy_readreg (struct xe_softc *scp, u_int16_t reg);
202 static void xe_phy_writereg (struct xe_softc *scp, u_int16_t reg, u_int16_t data);
203
204 /*
205 * Debug functions -- uncomment for VERY verbose dignostic information.
206 * Set to 1 for less verbose information
207 */
208 /* #define XE_DEBUG 2 */
209 #ifdef XE_DEBUG
210 #define XE_REG_DUMP(scp) xe_reg_dump((scp))
211 #define XE_MII_DUMP(scp) xe_mii_dump((scp))
212 static void xe_reg_dump (struct xe_softc *scp);
213 static void xe_mii_dump (struct xe_softc *scp);
214 #else
215 #define XE_REG_DUMP(scp)
216 #define XE_MII_DUMP(scp)
217 #endif
218
219 /*
220 * Fixing for RealPort cards - they need a little furtling to get the
221 * ethernet working
222 */
223 static int
224 xe_cem56fix(device_t dev)
225 {
226 struct xe_softc *sc = (struct xe_softc *) device_get_softc(dev);
227 bus_space_tag_t bst;
228 bus_space_handle_t bsh;
229 struct resource *r;
230 int rid;
231 int ioport;
232
233 #ifdef XE_DEBUG
234 device_printf(dev, "Hacking your Realport, master\n");
235 #endif
236
237 #if XE_DEBUG > 1
238 device_printf(dev, "Realport port 0x%0lx, size 0x%0lx\n",
239 bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
240 bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid));
241 #endif
242
243 rid = 0;
244 r = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 4 << 10, RF_ACTIVE);
245 if (!r) {
246 #if XE_DEBUG > 0
247 device_printf(dev, "Can't map in attribute memory\n");
248 #endif
249 return -1;
250 }
251
252 bsh = rman_get_bushandle(r);
253 bst = rman_get_bustag(r);
254
255 CARD_SET_RES_FLAGS(device_get_parent(dev), dev, SYS_RES_MEMORY, rid,
256 PCCARD_A_MEM_ATTR);
257
258 bus_space_write_1(bst, bsh, DINGO_ECOR, DINGO_ECOR_IRQ_LEVEL |
259 DINGO_ECOR_INT_ENABLE |
260 DINGO_ECOR_IOB_ENABLE |
261 DINGO_ECOR_ETH_ENABLE);
262 ioport = bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid);
263 bus_space_write_1(bst, bsh, DINGO_EBAR0, ioport & 0xff);
264 bus_space_write_1(bst, bsh, DINGO_EBAR1, (ioport >> 8) & 0xff);
265
266 bus_space_write_1(bst, bsh, DINGO_DCOR0, DINGO_DCOR0_SF_INT);
267 bus_space_write_1(bst, bsh, DINGO_DCOR1, DINGO_DCOR1_INT_LEVEL |
268 DINGO_DCOR1_EEDIO);
269 bus_space_write_1(bst, bsh, DINGO_DCOR2, 0x00);
270 bus_space_write_1(bst, bsh, DINGO_DCOR3, 0x00);
271 bus_space_write_1(bst, bsh, DINGO_DCOR4, 0x00);
272
273 bus_release_resource(dev, SYS_RES_MEMORY, rid, r);
274
275 /* success! */
276 return 0;
277 }
278
279 /*
280 * PCMCIA probe routine.
281 * Probe and identify the device. Called by the slot manager when the card is
282 * inserted or the machine wakes up from suspend mode. Assmes that the slot
283 * structure has been initialised already.
284 */
285 static int
286 xe_probe(device_t dev)
287 {
288 struct xe_softc *scp = (struct xe_softc *) device_get_softc(dev);
289 bus_space_tag_t bst;
290 bus_space_handle_t bsh;
291 int buf;
292 u_char ver_str[CISTPL_BUFSIZE>>1];
293 off_t offs;
294 int success, rc, i;
295 int rid;
296 struct resource *r;
297
298 success = 0;
299
300 #ifdef XE_DEBUG
301 device_printf(dev, "xe: Probing\n");
302 #endif
303
304 /* Map in the CIS */
305 rid = 0;
306 r = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 4 << 10, RF_ACTIVE);
307 if (!r) {
308 #ifdef XE_DEBUG
309 device_printf(dev, "Can't map in cis\n");
310 #endif
311 return ENOMEM;
312 }
313 bsh = rman_get_bushandle(r);
314 bst = rman_get_bustag(r);
315 buf = 0;
316
317 CARD_SET_RES_FLAGS(device_get_parent(dev), dev, SYS_RES_MEMORY, rid,
318 PCCARD_A_MEM_ATTR);
319
320 /* Grep through CIS looking for relevant tuples */
321 offs = 0;
322 do {
323 u_int16_t vendor;
324 u_int8_t rev, media, prod;
325
326 switch (CISTPL_TYPE(buf)) {
327
328 case 0x15: /* Grab version string (needed to ID some weird CE2's) */
329 #if XE_DEBUG > 1
330 device_printf(dev, "Got version string (0x15)\n");
331 #endif
332 for (i = 0; i < CISTPL_LEN(buf); ver_str[i] = CISTPL_DATA(buf, i++));
333 ver_str[i] = '\0';
334 ver_str[(CISTPL_BUFSIZE>>1) - 1] = CISTPL_LEN(buf);
335 success++;
336 break;
337
338 case 0x20: /* Figure out what type of card we have */
339 #if XE_DEBUG > 1
340 device_printf(dev, "Got card ID (0x20)\n");
341 #endif
342 vendor = CISTPL_DATA(buf, 0) + (CISTPL_DATA(buf, 1) << 8);
343 rev = CISTPL_DATA(buf, 2);
344 media = CISTPL_DATA(buf, 3);
345 prod = CISTPL_DATA(buf, 4);
346
347 switch (vendor) { /* Get vendor ID */
348 case 0x0105:
349 scp->vendor = "Xircom"; break;
350 case 0x0138:
351 case 0x0183:
352 scp->vendor = "Compaq"; break;
353 case 0x0089:
354 scp->vendor = "Intel"; break;
355 default:
356 scp->vendor = "Unknown";
357 }
358
359 if (!((prod & 0x40) && (media & 0x01))) {
360 #if XE_DEBUG > 1
361 device_printf(dev, "Not a PCMCIA Ethernet card!\n");
362 #endif
363 rc = ENODEV; /* Not a PCMCIA Ethernet device */
364 } else {
365 if (media & 0x10) { /* Ethernet/modem cards */
366 #if XE_DEBUG > 1
367 device_printf(dev, "Card is Ethernet/modem combo\n");
368 #endif
369 scp->modem = 1;
370 switch (prod & 0x0f) {
371 case 1:
372 scp->card_type = "CEM"; break;
373 case 2:
374 scp->ce2 = 1;
375 scp->card_type = "CEM2"; break;
376 case 3:
377 scp->ce2 = 1;
378 scp->card_type = "CEM3"; break;
379 case 4:
380 scp->ce2 = 1;
381 scp->card_type = "CEM33"; break;
382 case 5:
383 scp->mohawk = 1;
384 scp->card_type = "CEM56M"; break;
385 case 6:
386 case 7: /* Some kind of RealPort card */
387 scp->mohawk = 1;
388 scp->dingo = 1;
389 scp->card_type = "CEM56"; break;
390 default:
391 rc = ENODEV;
392 }
393 } else { /* Ethernet-only cards */
394 #if XE_DEBUG > 1
395 device_printf(dev, "Card is Ethernet only\n");
396 #endif
397 switch (prod & 0x0f) {
398 case 1:
399 scp->card_type = "CE"; break;
400 case 2:
401 scp->ce2 = 1;
402 scp->card_type = "CE2"; break;
403 case 3:
404 scp->mohawk = 1;
405 scp->card_type = "CE3"; break;
406 default:
407 rc = ENODEV;
408 }
409 }
410 }
411 success++;
412 break;
413
414 case 0x22: /* Get MAC address */
415 if ((CISTPL_LEN(buf) == 8) &&
416 (CISTPL_DATA(buf, 0) == 0x04) &&
417 (CISTPL_DATA(buf, 1) == ETHER_ADDR_LEN)) {
418 #if XE_DEBUG > 1
419 device_printf(dev, "Got MAC address (0x22)\n");
420 #endif
421 for (i = 0; i < ETHER_ADDR_LEN; i++)
422 scp->arpcom.ac_enaddr[i] = CISTPL_DATA(buf, i+2);
423 }
424 success++;
425 break;
426 default:
427 break;
428 }
429
430 if (CISTPL_TYPE(buf) == 0xff)
431 break;
432 /* Skip to next tuple */
433 buf += ((CISTPL_LEN(buf) + 2) << 1);
434
435 } while (1);
436
437 /* unmap the cis */
438 bus_release_resource(dev, SYS_RES_MEMORY, rid, r);
439
440 /* Die now if something went wrong above */
441 if (success < 3)
442 return ENXIO;
443
444 /* Check for certain strange CE2's that look like CE's */
445 if (strcmp(scp->card_type, "CE") == 0) {
446 u_char *str = ver_str;
447 #if XE_DEBUG > 1
448 device_printf(dev, "Checking for weird CE2 string\n");
449 #endif
450 str += strlen(str) + 1; /* Skip forward to 3rd version string */
451 str += strlen(str) + 1;
452 str += strlen(str) + 1;
453 for (i = 0; i < strlen(str) - 2; i++) {
454 if (bcmp(&str[i], "CE2", 3) ==0) { /* Look for "CE2" string */
455 scp->card_type = "CE2";
456 }
457 }
458 }
459
460 /* Reject unsupported cards */
461 if (strcmp(scp->card_type, "CE") == 0 || strcmp(scp->card_type, "CEM") == 0) {
462 device_printf(dev, "Sorry, your %s card is not supported :(\n",
463 scp->card_type);
464 return ENODEV;
465 }
466
467 /* Success */
468 return 0;
469 }
470
471 /*
472 * The device entry is being removed, probably because someone ejected the
473 * card. The interface should have been brought down manually before calling
474 * this function; if not you may well lose packets. In any case, I shut down
475 * the card and the interface, and hope for the best.
476 */
477 static int
478 xe_detach(device_t dev) {
479 struct xe_softc *sc = device_get_softc(dev);
480
481 sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING;
482 ether_ifdetach(&sc->arpcom.ac_if, ETHER_BPF_SUPPORTED);
483 xe_deactivate(dev);
484 return 0;
485 }
486
487 /*
488 * Attach a device.
489 */
490 static int
491 xe_attach (device_t dev) {
492 struct xe_softc *scp = device_get_softc(dev);
493 int err;
494
495 #ifdef XE_DEBUG
496 device_printf(dev, "attach\n");
497 #endif
498
499 if ((err = xe_activate(dev)) != 0)
500 return (err);
501
502 /* Fill in some private data */
503 scp->ifp = &scp->arpcom.ac_if;
504 scp->ifm = &scp->ifmedia;
505 scp->autoneg_status = 0;
506
507 /* Hack RealPorts into submission */
508 if (scp->dingo && xe_cem56fix(dev) < 0) {
509 device_printf(dev, "Unable to fix your RealPort\n");
510 xe_deactivate(dev);
511 return ENODEV;
512 }
513
514 /* Hopefully safe to read this here */
515 XE_SELECT_PAGE(4);
516 scp->version = XE_INB(XE_BOV);
517
518 scp->dev = dev;
519 /* Initialise the ifnet structure */
520 if (!scp->ifp->if_name) {
521 scp->ifp->if_softc = scp;
522 scp->ifp->if_name = "xe";
523 scp->ifp->if_unit = device_get_unit(dev);
524 scp->ifp->if_timer = 0;
525 scp->ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
526 scp->ifp->if_linkmib = &scp->mibdata;
527 scp->ifp->if_linkmiblen = sizeof scp->mibdata;
528 scp->ifp->if_output = ether_output;
529 scp->ifp->if_start = xe_start;
530 scp->ifp->if_ioctl = xe_ioctl;
531 scp->ifp->if_watchdog = xe_watchdog;
532 scp->ifp->if_init = xe_init;
533 scp->ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
534 }
535
536 /* Initialise the ifmedia structure */
537 ifmedia_init(scp->ifm, 0, xe_media_change, xe_media_status);
538 callout_handle_init(&scp->chand);
539
540 /*
541 * Fill in supported media types. Some cards _do_ support full duplex
542 * operation, but this driver doesn't, yet. Therefore we leave those modes
543 * out of the list. We support some form of autoselection in all cases.
544 */
545 if (scp->mohawk) {
546 ifmedia_add(scp->ifm, IFM_ETHER|IFM_100_TX, 0, NULL);
547 ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL);
548 }
549 else {
550 ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL);
551 ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_2, 0, NULL);
552 }
553 ifmedia_add(scp->ifm, IFM_ETHER|IFM_AUTO, 0, NULL);
554
555 /* Default is to autoselect best supported media type */
556 ifmedia_set(scp->ifm, IFM_ETHER|IFM_AUTO);
557
558 /* Print some useful information */
559 device_printf(dev, "%s %s, bonding version %#x%s%s\n",
560 scp->vendor,
561 scp->card_type,
562 scp->version,
563 scp->mohawk ? ", 100Mbps capable" : "",
564 scp->modem ? ", with modem" : "");
565 if (scp->mohawk) {
566 XE_SELECT_PAGE(0x10);
567 device_printf(dev, "DingoID = %#x, RevisionID = %#x, VendorID = %#x\n",
568 XE_INW(XE_DINGOID),
569 XE_INW(XE_RevID),
570 XE_INW(XE_VendorID));
571 }
572 if (scp->ce2) {
573 XE_SELECT_PAGE(0x45);
574 device_printf(dev, "CE2 version = %#x\n", XE_INB(XE_REV));
575 }
576
577 /* Print MAC address */
578 device_printf(dev, "Ethernet address %6D\n", scp->arpcom.ac_enaddr, ":");
579
580 /* Attach the interface */
581 ether_ifattach(scp->ifp, ETHER_BPF_SUPPORTED);
582
583 /* Done */
584 return 0;
585 }
586
587
588 /*
589 * Initialize device. Completes the reset procedure on the card and starts
590 * output. If there's an autonegotiation in progress we DON'T do anything;
591 * the media selection code will call us again when it's done.
592 */
593 static void
594 xe_init(void *xscp) {
595 struct xe_softc *scp = xscp;
596 int s;
597
598 #ifdef XE_DEBUG
599 device_printf(scp->dev, "init\n");
600 #endif
601
602 if (TAILQ_EMPTY(&scp->ifp->if_addrhead)) return;
603
604 /* Reset transmitter flags */
605 scp->tx_queued = 0;
606 scp->tx_tpr = 0;
607 scp->tx_collisions = 0;
608 scp->ifp->if_timer = 0;
609
610 s = splimp();
611
612 XE_SELECT_PAGE(0x42);
613 XE_OUTB(XE_SWC0, 0x20); /* Disable source insertion (WTF is that?) */
614
615 /*
616 * Set the 'local memory dividing line' -- splits the 32K card memory into
617 * 8K for transmit buffers and 24K for receive. This is done automatically
618 * on newer revision cards.
619 */
620 if (scp->srev != 1) {
621 XE_SELECT_PAGE(2);
622 XE_OUTW(XE_RBS, 0x2000);
623 }
624
625 /* Set up multicast addresses */
626 xe_setmulti(scp);
627
628 /* Fix the data offset register -- reset leaves it off-by-one */
629 XE_SELECT_PAGE(0);
630 XE_OUTW(XE_DO, 0x2000);
631
632 /*
633 * Set MAC interrupt masks and clear status regs. The bit names are direct
634 * from the Linux code; I have no idea what most of them do.
635 */
636 XE_SELECT_PAGE(0x40); /* Bit 7..0 */
637 XE_OUTB(XE_RX0Msk, 0xff); /* ROK, RAB, rsv, RO, CRC, AE, PTL, MP */
638 XE_OUTB(XE_TX0Msk, 0xff); /* TOK, TAB, SQE, LL, TU, JAB, EXC, CRS */
639 XE_OUTB(XE_TX0Msk+1, 0xb0); /* rsv, rsv, PTD, EXT, rsv, rsv, rsv, rsv */
640 XE_OUTB(XE_RST0, 0x00); /* ROK, RAB, REN, RO, CRC, AE, PTL, MP */
641 XE_OUTB(XE_TXST0, 0x00); /* TOK, TAB, SQE, LL, TU, JAB, EXC, CRS */
642 XE_OUTB(XE_TXST1, 0x00); /* TEN, rsv, PTD, EXT, retry_counter:4 */
643
644 /*
645 * Check for an in-progress autonegotiation. If one is active, just set
646 * IFF_RUNNING and return. The media selection code will call us again when
647 * it's done.
648 */
649 if (scp->autoneg_status) {
650 scp->ifp->if_flags |= IFF_RUNNING;
651 }
652 else {
653 /* Enable receiver, put MAC online */
654 XE_SELECT_PAGE(0x40);
655 XE_OUTB(XE_CMD0, XE_CMD0_RX_ENABLE|XE_CMD0_ONLINE);
656
657 /* Set up IMR, enable interrupts */
658 xe_enable_intr(scp);
659
660 /* Attempt to start output */
661 scp->ifp->if_flags |= IFF_RUNNING;
662 scp->ifp->if_flags &= ~IFF_OACTIVE;
663 xe_start(scp->ifp);
664 }
665
666 (void)splx(s);
667 }
668
669
670 /*
671 * Start output on interface. We make two assumptions here:
672 * 1) that the current priority is set to splimp _before_ this code
673 * is called *and* is returned to the appropriate priority after
674 * return
675 * 2) that the IFF_OACTIVE flag is checked before this code is called
676 * (i.e. that the output part of the interface is idle)
677 */
678 static void
679 xe_start(struct ifnet *ifp) {
680 struct xe_softc *scp = ifp->if_softc;
681 struct mbuf *mbp;
682
683 /*
684 * Loop while there are packets to be sent, and space to send them.
685 */
686 while (1) {
687 IF_DEQUEUE(&ifp->if_snd, mbp); /* Suck a packet off the send queue */
688
689 if (mbp == NULL) {
690 /*
691 * We are using the !OACTIVE flag to indicate to the outside world that
692 * we can accept an additional packet rather than that the transmitter
693 * is _actually_ active. Indeed, the transmitter may be active, but if
694 * we haven't filled all the buffers with data then we still want to
695 * accept more.
696 */
697 ifp->if_flags &= ~IFF_OACTIVE;
698 return;
699 }
700
701 if (xe_pio_write_packet(scp, mbp) != 0) {
702 IF_PREPEND(&ifp->if_snd, mbp); /* Push the packet back onto the queue */
703 ifp->if_flags |= IFF_OACTIVE;
704 return;
705 }
706
707 /* Tap off here if there is a bpf listener */
708 if (ifp->if_bpf) {
709 #if XE_DEBUG > 1
710 device_printf(scp->dev, "sending output packet to BPF\n");
711 #endif
712 bpf_mtap(ifp, mbp);
713 }
714
715 ifp->if_timer = 5; /* In case we don't hear from the card again */
716 scp->tx_queued++;
717
718 m_freem(mbp);
719 }
720 }
721
722
723 /*
724 * Process an ioctl request. Adapted from the ed driver.
725 */
726 static int
727 xe_ioctl (register struct ifnet *ifp, u_long command, caddr_t data) {
728 struct xe_softc *scp;
729 int s, error;
730
731 scp = ifp->if_softc;
732 error = 0;
733
734 s = splimp();
735
736 switch (command) {
737
738 case SIOCSIFADDR:
739 case SIOCGIFADDR:
740 case SIOCSIFMTU:
741 error = ether_ioctl(ifp, command, data);
742 break;
743
744 case SIOCSIFFLAGS:
745 /*
746 * If the interface is marked up and stopped, then start it. If it is
747 * marked down and running, then stop it.
748 */
749 if (ifp->if_flags & IFF_UP) {
750 if (!(ifp->if_flags & IFF_RUNNING)) {
751 xe_hard_reset(scp);
752 xe_setmedia(scp);
753 xe_init(scp);
754 }
755 }
756 else {
757 if (ifp->if_flags & IFF_RUNNING)
758 xe_stop(scp);
759 }
760
761 case SIOCADDMULTI:
762 case SIOCDELMULTI:
763 /*
764 * Multicast list has (maybe) changed; set the hardware filter
765 * accordingly. This also serves to deal with promiscuous mode if we have
766 * a BPF listener active.
767 */
768 xe_setmulti(scp);
769 error = 0;
770 break;
771
772 case SIOCSIFMEDIA:
773 case SIOCGIFMEDIA:
774 /*
775 * Someone wants to get/set media options.
776 */
777 error = ifmedia_ioctl(ifp, (struct ifreq *)data, &scp->ifmedia, command);
778 break;
779
780 default:
781 error = EINVAL;
782 }
783
784 (void)splx(s);
785
786 return error;
787 }
788
789
790 /*
791 * Card interrupt handler.
792 *
793 * This function is probably more complicated than it needs to be, as it
794 * attempts to deal with the case where multiple packets get sent between
795 * interrupts. This is especially annoying when working out the collision
796 * stats. Not sure whether this case ever really happens or not (maybe on a
797 * slow/heavily loaded machine?) so it's probably best to leave this like it
798 * is.
799 *
800 * Note that the crappy PIO used to get packets on and off the card means that
801 * you will spend a lot of time in this routine -- I can get my P150 to spend
802 * 90% of its time servicing interrupts if I really hammer the network. Could
803 * fix this, but then you'd start dropping/losing packets. The moral of this
804 * story? If you want good network performance _and_ some cycles left over to
805 * get your work done, don't buy a Xircom card. Or convince them to tell me
806 * how to do memory-mapped I/O :)
807 */
808 static void
809 xe_intr(void *xscp)
810 {
811 struct xe_softc *scp = (struct xe_softc *) xscp;
812 struct ifnet *ifp;
813 int result;
814 u_int16_t rx_bytes, rxs, txs;
815 u_int8_t psr, isr, esr, rsr;
816
817 ifp = &scp->arpcom.ac_if;
818 rx_bytes = 0; /* Bytes received on this interrupt */
819 result = 0; /* Set true if the interrupt is for us */
820
821 if (scp->mohawk) {
822 XE_OUTB(XE_CR, 0); /* Disable interrupts */
823 }
824
825 psr = XE_INB(XE_PR); /* Stash the current register page */
826
827 /*
828 * Read ISR to see what caused this interrupt. Note that this clears the
829 * ISR on CE2 type cards.
830 */
831 if ((isr = XE_INB(XE_ISR)) && isr != 0xff) {
832
833 result = 1; /* This device did generate an int */
834 esr = XE_INB(XE_ESR); /* Read the other status registers */
835 XE_SELECT_PAGE(0x40);
836 rxs = XE_INB(XE_RST0);
837 XE_OUTB(XE_RST0, ~rxs & 0xff);
838 txs = XE_INB(XE_TXST0);
839 txs |= XE_INB(XE_TXST1) << 8;
840 XE_OUTB(XE_TXST0, 0);
841 XE_OUTB(XE_TXST1, 0);
842 XE_SELECT_PAGE(0);
843
844 #if XE_DEBUG > 2
845 printf("xe%d: ISR=%#2.2x ESR=%#2.2x RST=%#2.2x TXST=%#4.4x\n", unit, isr, esr, rxs, txs);
846 #endif
847
848 /*
849 * Handle transmit interrupts
850 */
851 if (isr & XE_ISR_TX_PACKET) {
852 u_int8_t new_tpr, sent;
853
854 if ((new_tpr = XE_INB(XE_TPR)) < scp->tx_tpr) /* Update packet count */
855 sent = (0xff - scp->tx_tpr) + new_tpr; /* TPR rolled over */
856 else
857 sent = new_tpr - scp->tx_tpr;
858
859 if (sent > 0) { /* Packets sent since last interrupt */
860 scp->tx_tpr = new_tpr;
861 scp->tx_queued -= sent;
862 ifp->if_opackets += sent;
863 ifp->if_collisions += scp->tx_collisions;
864
865 /*
866 * Collision stats are a PITA. If multiples frames have been sent, we
867 * distribute any outstanding collision count equally amongst them.
868 * However, if we're missing interrupts we're quite likely to also
869 * miss some collisions; thus the total count will be off anyway.
870 * Likewise, if we miss a frame dropped due to excessive collisions
871 * any outstanding collisions count will be held against the next
872 * frame to be successfully sent. Hopefully it averages out in the
873 * end!
874 * XXX - This will screw up if tx_collisions/sent > 14. FIX IT!
875 */
876 switch (scp->tx_collisions) {
877 case 0:
878 break;
879 case 1:
880 scp->mibdata.dot3StatsSingleCollisionFrames++;
881 scp->mibdata.dot3StatsCollFrequencies[0]++;
882 break;
883 default:
884 if (sent == 1) {
885 scp->mibdata.dot3StatsMultipleCollisionFrames++;
886 scp->mibdata.dot3StatsCollFrequencies[scp->tx_collisions-1]++;
887 }
888 else { /* Distribute across multiple frames */
889 scp->mibdata.dot3StatsMultipleCollisionFrames += sent;
890 scp->mibdata.
891 dot3StatsCollFrequencies[scp->tx_collisions/sent] += sent - scp->tx_collisions%sent;
892 scp->mibdata.
893 dot3StatsCollFrequencies[scp->tx_collisions/sent + 1] += scp->tx_collisions%sent;
894 }
895 }
896 scp->tx_collisions = 0;
897 }
898 ifp->if_timer = 0;
899 ifp->if_flags &= ~IFF_OACTIVE;
900 }
901 if (txs & 0x0002) { /* Excessive collisions (packet dropped) */
902 ifp->if_collisions += 16;
903 ifp->if_oerrors++;
904 scp->tx_collisions = 0;
905 scp->mibdata.dot3StatsExcessiveCollisions++;
906 scp->mibdata.dot3StatsMultipleCollisionFrames++;
907 scp->mibdata.dot3StatsCollFrequencies[15]++;
908 XE_OUTB(XE_CR, XE_CR_RESTART_TX);
909 }
910 if (txs & 0x0040) /* Transmit aborted -- probably collisions */
911 scp->tx_collisions++;
912
913
914 /*
915 * Handle receive interrupts
916 */
917 while ((esr = XE_INB(XE_ESR)) & XE_ESR_FULL_PACKET_RX) {
918
919 if ((rsr = XE_INB(XE_RSR)) & XE_RSR_RX_OK) {
920 struct ether_header *ehp;
921 struct mbuf *mbp;
922 u_int16_t len;
923
924 len = XE_INW(XE_RBC);
925
926 if (len == 0)
927 continue;
928
929 #if 0
930 /*
931 * Limit the amount of time we spend in this loop, dropping packets if
932 * necessary. The Linux code does this with considerably more
933 * finesse, adjusting the threshold dynamically.
934 */
935 if ((rx_bytes += len) > 22000) {
936 ifp->if_iqdrops++;
937 scp->mibData.dot3StatsMissedFrames++;
938 XE_OUTW(XE_DO, 0x8000);
939 continue;
940 }
941 #endif
942
943 if (len & 0x01)
944 len++;
945
946 MGETHDR(mbp, M_DONTWAIT, MT_DATA); /* Allocate a header mbuf */
947 if (mbp != NULL) {
948 mbp->m_pkthdr.rcvif = ifp;
949 mbp->m_pkthdr.len = mbp->m_len = len;
950
951 /*
952 * If the mbuf header isn't big enough for the packet, attach an
953 * mbuf cluster to hold it. The +2 is to allow for the nasty little
954 * alignment hack below.
955 */
956 if (len + 2 > MHLEN) {
957 MCLGET(mbp, M_DONTWAIT);
958 if ((mbp->m_flags & M_EXT) == 0) {
959 m_freem(mbp);
960 mbp = NULL;
961 }
962 }
963 }
964
965 if (mbp != NULL) {
966 /*
967 * The Ethernet header is 14 bytes long; thus the actual packet data
968 * won't be 32-bit aligned when it's dumped into the mbuf. We
969 * offset everything by 2 bytes to fix this. Apparently the
970 * alignment is important for NFS, damn its eyes.
971 */
972 mbp->m_data += 2;
973 ehp = mtod(mbp, struct ether_header *);
974
975 /*
976 * Now get the packet, including the Ethernet header and trailer (?)
977 * We use programmed I/O, because we don't know how to do shared
978 * memory with these cards. So yes, it's real slow, and heavy on
979 * the interrupts (CPU on my P150 maxed out at ~950KBps incoming).
980 */
981 if (scp->srev == 0) { /* Workaround a bug in old cards */
982 u_short rhs;
983
984 XE_SELECT_PAGE(5);
985 rhs = XE_INW(XE_RHSA);
986 XE_SELECT_PAGE(0);
987
988 rhs += 3; /* Skip control info */
989
990 if (rhs >= 0x8000)
991 rhs = 0;
992
993 if (rhs + len > 0x8000) {
994 int i;
995
996 /*
997 * XXX - This i-- seems very wrong, but it's what the Linux guys
998 * XXX - do. Need someone with an old CE2 to test this for me.
999 * XXX - 99/3/28: Changed the first i-- to an i++, maybe that'll
1000 * XXX - fix it? It seems as though the previous version would
1001 * XXX - have caused an infinite loop (what, another one?).
1002 */
1003 for (i = 0; i < len; i++, rhs++) {
1004 ((char *)ehp)[i] = XE_INB(XE_EDP);
1005 if (rhs == 0x8000) {
1006 rhs = 0;
1007 i--;
1008 }
1009 }
1010 }
1011 else
1012 bus_space_read_multi_2(scp->bst, scp->bsh, XE_EDP,
1013 (u_int16_t *) ehp, len >> 1);
1014 }
1015 else
1016 bus_space_read_multi_2(scp->bst, scp->bsh, XE_EDP,
1017 (u_int16_t *) ehp, len >> 1);
1018
1019 /* Deliver packet to upper layers */
1020 if (mbp != NULL) {
1021 mbp->m_pkthdr.len = mbp->m_len = len - ETHER_HDR_LEN;
1022 mbp->m_data += ETHER_HDR_LEN; /* Strip off Ethernet header */
1023 ether_input(ifp, ehp, mbp); /* Send the packet on its way */
1024 ifp->if_ipackets++; /* Success! */
1025 }
1026 XE_OUTW(XE_DO, 0x8000); /* skip_rx_packet command */
1027 }
1028 }
1029 else if (rsr & XE_RSR_LONG_PACKET) { /* Packet length >1518 bytes */
1030 scp->mibdata.dot3StatsFrameTooLongs++;
1031 ifp->if_ierrors++;
1032 }
1033 else if (rsr & XE_RSR_CRC_ERROR) { /* Bad checksum on packet */
1034 scp->mibdata.dot3StatsFCSErrors++;
1035 ifp->if_ierrors++;
1036 }
1037 else if (rsr & XE_RSR_ALIGN_ERROR) { /* Packet alignment error */
1038 scp->mibdata.dot3StatsAlignmentErrors++;
1039 ifp->if_ierrors++;
1040 }
1041 }
1042 if (rxs & 0x10) { /* Receiver overrun */
1043 scp->mibdata.dot3StatsInternalMacReceiveErrors++;
1044 ifp->if_ierrors++;
1045 XE_OUTB(XE_CR, XE_CR_CLEAR_OVERRUN);
1046 }
1047 }
1048
1049 XE_SELECT_PAGE(psr); /* Restore saved page */
1050 XE_OUTB(XE_CR, XE_CR_ENABLE_INTR); /* Re-enable interrupts */
1051
1052 /* Could force an int here, instead of dropping packets? */
1053 /* XE_OUTB(XE_CR, XE_CR_ENABLE_INTR|XE_CE_FORCE_INTR); */
1054
1055 return;
1056 }
1057
1058
1059 /*
1060 * Device timeout/watchdog routine. Called automatically if we queue a packet
1061 * for transmission but don't get an interrupt within a specified timeout
1062 * (usually 5 seconds). When this happens we assume the worst and reset the
1063 * card.
1064 */
1065 static void
1066 xe_watchdog(struct ifnet *ifp) {
1067 struct xe_softc *scp = ifp->if_softc;
1068
1069 device_printf(scp->dev, "watchdog timeout; resetting card\n");
1070 scp->tx_timeouts++;
1071 ifp->if_oerrors += scp->tx_queued;
1072 xe_stop(scp);
1073 xe_hard_reset(scp);
1074 xe_setmedia(scp);
1075 xe_init(scp);
1076 }
1077
1078
1079 /*
1080 * Change media selection.
1081 */
1082 static int
1083 xe_media_change(struct ifnet *ifp) {
1084 struct xe_softc *scp = ifp->if_softc;
1085
1086 #ifdef XE_DEBUG
1087 printf("xe%d: media_change\n", ifp->if_unit);
1088 #endif
1089
1090 if (IFM_TYPE(scp->ifm->ifm_media) != IFM_ETHER)
1091 return(EINVAL);
1092
1093 /*
1094 * Some card/media combos aren't always possible -- filter those out here.
1095 */
1096 if ((IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_AUTO ||
1097 IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_100_TX) && !scp->phy_ok)
1098 return (EINVAL);
1099
1100 xe_setmedia(scp);
1101
1102 return 0;
1103 }
1104
1105
1106 /*
1107 * Return current media selection.
1108 */
1109 static void
1110 xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp) {
1111
1112 #ifdef XE_DEBUG
1113 printf("xe%d: media_status\n", ifp->if_unit);
1114 #endif
1115
1116 mrp->ifm_active = ((struct xe_softc *)ifp->if_softc)->media;
1117
1118 return;
1119 }
1120
1121
1122 /*
1123 * Select active media.
1124 */
1125 static void xe_setmedia(void *xscp) {
1126 struct xe_softc *scp = xscp;
1127 u_int16_t bmcr, bmsr, anar, lpar;
1128
1129 #ifdef XE_DEBUG
1130 device_printf(scp->dev, "setmedia\n");
1131 #endif
1132
1133 /* Cancel any pending timeout */
1134 untimeout(xe_setmedia, scp, scp->chand);
1135 xe_disable_intr(scp);
1136
1137 /* Select media */
1138 scp->media = IFM_ETHER;
1139 switch (IFM_SUBTYPE(scp->ifm->ifm_media)) {
1140
1141 case IFM_AUTO: /* Autoselect media */
1142 scp->media = IFM_ETHER|IFM_AUTO;
1143
1144 /*
1145 * Autoselection is really awful. It goes something like this:
1146 *
1147 * Wait until the transmitter goes idle (2sec timeout).
1148 * Reset card
1149 * IF a 100Mbit PHY exists
1150 * Start NWAY autonegotiation (3.5sec timeout)
1151 * IF that succeeds
1152 * Select 100baseTX or 10baseT, whichever was detected
1153 * ELSE
1154 * Reset card
1155 * IF a 100Mbit PHY exists
1156 * Try to force a 100baseTX link (3sec timeout)
1157 * IF that succeeds
1158 * Select 100baseTX
1159 * ELSE
1160 * Disable the PHY
1161 * ENDIF
1162 * ENDIF
1163 * ENDIF
1164 * ENDIF
1165 * IF nothing selected so far
1166 * IF a 100Mbit PHY exists
1167 * Select 10baseT
1168 * ELSE
1169 * Select 10baseT or 10base2, whichever is connected
1170 * ENDIF
1171 * ENDIF
1172 */
1173 switch (scp->autoneg_status) {
1174
1175 case XE_AUTONEG_NONE:
1176 #if XE_DEBUG > 1
1177 device_printf(scp->dev, "Waiting for idle transmitter\n");
1178 #endif
1179 scp->arpcom.ac_if.if_flags |= IFF_OACTIVE;
1180 scp->autoneg_status = XE_AUTONEG_WAITING;
1181 scp->chand = timeout(xe_setmedia, scp, hz * 2);
1182 return;
1183
1184 case XE_AUTONEG_WAITING:
1185 xe_soft_reset(scp);
1186 if (scp->phy_ok) {
1187 #if XE_DEBUG > 1
1188 device_printf(scp->dev, "Starting autonegotiation\n");
1189 #endif
1190 bmcr = xe_phy_readreg(scp, PHY_BMCR);
1191 bmcr &= ~(PHY_BMCR_AUTONEGENBL);
1192 xe_phy_writereg(scp, PHY_BMCR, bmcr);
1193 anar = xe_phy_readreg(scp, PHY_ANAR);
1194 anar &= ~(PHY_ANAR_100BT4|PHY_ANAR_100BTXFULL|PHY_ANAR_10BTFULL);
1195 anar |= PHY_ANAR_100BTXHALF|PHY_ANAR_10BTHALF;
1196 xe_phy_writereg(scp, PHY_ANAR, anar);
1197 bmcr |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR;
1198 xe_phy_writereg(scp, PHY_BMCR, bmcr);
1199 scp->autoneg_status = XE_AUTONEG_STARTED;
1200 scp->chand = timeout(xe_setmedia, scp, hz * 7/2);
1201 return;
1202 }
1203 else {
1204 scp->autoneg_status = XE_AUTONEG_FAIL;
1205 }
1206 break;
1207
1208 case XE_AUTONEG_STARTED:
1209 bmsr = xe_phy_readreg(scp, PHY_BMSR);
1210 lpar = xe_phy_readreg(scp, PHY_LPAR);
1211 if (bmsr & (PHY_BMSR_AUTONEGCOMP|PHY_BMSR_LINKSTAT)) {
1212 #if XE_DEBUG > 1
1213 device_printf(scp->dev, "Autonegotiation complete!\n");
1214 #endif
1215 /*
1216 * XXX - Shouldn't have to do this, but (on my hub at least) the
1217 * XXX - transmitter won't work after a successful autoneg. So we see
1218 * XXX - what the negotiation result was and force that mode. I'm
1219 * XXX - sure there is an easy fix for this.
1220 */
1221 if (lpar & PHY_LPAR_100BTXHALF) {
1222 xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL);
1223 XE_MII_DUMP(scp);
1224 XE_SELECT_PAGE(2);
1225 XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
1226 scp->media = IFM_ETHER|IFM_100_TX;
1227 scp->autoneg_status = XE_AUTONEG_NONE;
1228 }
1229 else {
1230 /*
1231 * XXX - Bit of a hack going on in here.
1232 * XXX - This is derived from Ken Hughes patch to the Linux driver
1233 * XXX - to make it work with 10Mbit _autonegotiated_ links on CE3B
1234 * XXX - cards. What's a CE3B and how's it differ from a plain CE3?
1235 * XXX - these are the things we need to find out.
1236 */
1237 xe_phy_writereg(scp, PHY_BMCR, 0x0000);
1238 XE_SELECT_PAGE(2);
1239 /* BEGIN HACK */
1240 XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
1241 XE_SELECT_PAGE(0x42);
1242 XE_OUTB(XE_SWC1, 0x80);
1243 scp->media = IFM_ETHER|IFM_10_T;
1244 scp->autoneg_status = XE_AUTONEG_NONE;
1245 /* END HACK */
1246 /*XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);*/ /* Disable PHY? */
1247 /*scp->autoneg_status = XE_AUTONEG_FAIL;*/
1248 }
1249 }
1250 else {
1251 #if XE_DEBUG > 1
1252 device_printf(scp->dev, "Autonegotiation failed; trying 100baseTX\n");
1253 #endif
1254 XE_MII_DUMP(scp);
1255 xe_soft_reset(scp);
1256 if (scp->phy_ok) {
1257 xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL);
1258 scp->autoneg_status = XE_AUTONEG_100TX;
1259 scp->chand = timeout(xe_setmedia, scp, hz * 3);
1260 return;
1261 }
1262 else {
1263 scp->autoneg_status = XE_AUTONEG_FAIL;
1264 }
1265 }
1266 break;
1267
1268 case XE_AUTONEG_100TX:
1269 (void)xe_phy_readreg(scp, PHY_BMSR);
1270 bmsr = xe_phy_readreg(scp, PHY_BMSR);
1271 if (bmsr & PHY_BMSR_LINKSTAT) {
1272 #if XE_DEBUG > 1
1273 device_printf(scp->dev, "Got 100baseTX link!\n");
1274 #endif
1275 XE_MII_DUMP(scp);
1276 XE_SELECT_PAGE(2);
1277 XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
1278 scp->media = IFM_ETHER|IFM_100_TX;
1279 scp->autoneg_status = XE_AUTONEG_NONE;
1280 }
1281 else {
1282 #if XE_DEBUG > 1
1283 device_printf(scp->dev, "Autonegotiation failed; disabling PHY\n");
1284 #endif
1285 XE_MII_DUMP(scp);
1286 xe_phy_writereg(scp, PHY_BMCR, 0x0000);
1287 XE_SELECT_PAGE(2);
1288 XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08); /* Disable PHY? */
1289 scp->autoneg_status = XE_AUTONEG_FAIL;
1290 }
1291 break;
1292 }
1293
1294 /*
1295 * If we got down here _and_ autoneg_status is XE_AUTONEG_FAIL, then
1296 * either autonegotiation failed, or never got started to begin with. In
1297 * either case, select a suitable 10Mbit media and hope it works. We
1298 * don't need to reset the card again, since it will have been done
1299 * already by the big switch above.
1300 */
1301 if (scp->autoneg_status == XE_AUTONEG_FAIL) {
1302 #if XE_DEBUG > 1
1303 device_printf(scp->dev, "Selecting 10baseX\n");
1304 #endif
1305 if (scp->mohawk) {
1306 XE_SELECT_PAGE(0x42);
1307 XE_OUTB(XE_SWC1, 0x80);
1308 scp->media = IFM_ETHER|IFM_10_T;
1309 scp->autoneg_status = XE_AUTONEG_NONE;
1310 }
1311 else {
1312 XE_SELECT_PAGE(4);
1313 XE_OUTB(XE_GPR0, 4);
1314 DELAY(50000);
1315 XE_SELECT_PAGE(0x42);
1316 XE_OUTB(XE_SWC1, (XE_INB(XE_ESR) & XE_ESR_MEDIA_SELECT) ? 0x80 : 0xc0);
1317 scp->media = IFM_ETHER|((XE_INB(XE_ESR) & XE_ESR_MEDIA_SELECT) ? IFM_10_T : IFM_10_2);
1318 scp->autoneg_status = XE_AUTONEG_NONE;
1319 }
1320 }
1321 break;
1322
1323
1324 /*
1325 * If a specific media has been requested, we just reset the card and
1326 * select it (one small exception -- if 100baseTX is requested by there is
1327 * no PHY, we fall back to 10baseT operation).
1328 */
1329 case IFM_100_TX: /* Force 100baseTX */
1330 xe_soft_reset(scp);
1331 if (scp->phy_ok) {
1332 #if XE_DEBUG > 1
1333 device_printf(scp->dev, "Selecting 100baseTX\n");
1334 #endif
1335 XE_SELECT_PAGE(0x42);
1336 XE_OUTB(XE_SWC1, 0);
1337 xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL);
1338 XE_SELECT_PAGE(2);
1339 XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
1340 scp->media |= IFM_100_TX;
1341 break;
1342 }
1343 /* FALLTHROUGH */
1344
1345 case IFM_10_T: /* Force 10baseT */
1346 xe_soft_reset(scp);
1347 #if XE_DEBUG > 1
1348 device_printf(scp->dev, "Selecting 10baseT\n");
1349 #endif
1350 if (scp->phy_ok) {
1351 xe_phy_writereg(scp, PHY_BMCR, 0x0000);
1352 XE_SELECT_PAGE(2);
1353 XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08); /* Disable PHY */
1354 }
1355 XE_SELECT_PAGE(0x42);
1356 XE_OUTB(XE_SWC1, 0x80);
1357 scp->media |= IFM_10_T;
1358 break;
1359
1360 case IFM_10_2:
1361 xe_soft_reset(scp);
1362 #if XE_DEBUG > 1
1363 device_printf(scp->dev, "Selecting 10base2\n");
1364 #endif
1365 XE_SELECT_PAGE(0x42);
1366 XE_OUTB(XE_SWC1, 0xc0);
1367 scp->media |= IFM_10_2;
1368 break;
1369 }
1370
1371
1372 /*
1373 * Finally, the LEDs are set to match whatever media was chosen and the
1374 * transmitter is unblocked.
1375 */
1376 #if XE_DEBUG > 1
1377 device_printf(scp->dev, "Setting LEDs\n");
1378 #endif
1379 XE_SELECT_PAGE(2);
1380 switch (IFM_SUBTYPE(scp->media)) {
1381 case IFM_100_TX:
1382 case IFM_10_T:
1383 XE_OUTB(XE_LED, 0x3b);
1384 if (scp->dingo)
1385 XE_OUTB(0x0b, 0x04); /* 100Mbit LED */
1386 break;
1387
1388 case IFM_10_2:
1389 XE_OUTB(XE_LED, 0x3a);
1390 break;
1391 }
1392
1393 /* Restart output? */
1394 scp->ifp->if_flags &= ~IFF_OACTIVE;
1395 xe_init(scp);
1396 }
1397
1398
1399 /*
1400 * Hard reset (power cycle) the card.
1401 */
1402 static void
1403 xe_hard_reset(struct xe_softc *scp) {
1404 int s;
1405
1406 #ifdef XE_DEBUG
1407 device_printf(scp->dev, "hard_reset\n");
1408 #endif
1409
1410 s = splimp();
1411
1412 /*
1413 * Power cycle the card.
1414 */
1415 XE_SELECT_PAGE(4);
1416 XE_OUTB(XE_GPR1, 0); /* Power off */
1417 DELAY(40000);
1418
1419 if (scp->mohawk)
1420 XE_OUTB(XE_GPR1, 1); /* And back on again */
1421 else
1422 XE_OUTB(XE_GPR1, 5); /* Also set AIC bit, whatever that is */
1423 DELAY(40000);
1424 XE_SELECT_PAGE(0);
1425
1426 (void)splx(s);
1427 }
1428
1429
1430 /*
1431 * Soft reset the card. Also makes sure that the ML6692 and 10Mbit controller
1432 * are powered up, sets the silicon revision number in softc, disables
1433 * interrupts and checks for the prescence of a 100Mbit PHY. This should
1434 * leave us in a position where we can access the PHY and do media
1435 * selection. The function imposes a 0.5s delay while the hardware powers up.
1436 */
1437 static void
1438 xe_soft_reset(struct xe_softc *scp) {
1439 int s;
1440
1441 #ifdef XE_DEBUG
1442 device_printf(scp->dev, "soft_reset\n");
1443 #endif
1444
1445 s = splimp();
1446
1447 /*
1448 * Reset the card, (again).
1449 */
1450 XE_SELECT_PAGE(0);
1451 XE_OUTB(XE_CR, XE_CR_SOFT_RESET);
1452 DELAY(40000);
1453 XE_OUTB(XE_CR, 0);
1454 DELAY(40000);
1455
1456 if (scp->mohawk) {
1457 /*
1458 * set GP1 and GP2 as outputs (bits 2 & 3)
1459 * set GP1 low to power on the ML6692 (bit 0)
1460 * set GP2 high to power on the 10Mhz chip (bit 1)
1461 */
1462 XE_SELECT_PAGE(4);
1463 XE_OUTB(XE_GPR0, 0x0e);
1464 }
1465
1466 /*
1467 * Wait for everything to wake up.
1468 */
1469 DELAY(500000);
1470
1471 /*
1472 * Get silicon revision number.
1473 */
1474 XE_SELECT_PAGE(4);
1475 if (scp->mohawk)
1476 scp->srev = (XE_INB(XE_BOV) & 0x70) >> 4;
1477 else
1478 scp->srev = (XE_INB(XE_BOV) & 0x30) >> 4;
1479 #ifdef XE_DEBUG
1480 device_printf(scp->dev, "silicon revision = %d\n", scp->srev);
1481 #endif
1482
1483 /*
1484 * Shut off interrupts.
1485 */
1486 xe_disable_intr(scp);
1487
1488 /*
1489 * Check for PHY.
1490 */
1491 if (scp->mohawk) {
1492 scp->phy_ok = xe_mii_init(scp);
1493 }
1494
1495 XE_SELECT_PAGE(0);
1496
1497 (void)splx(s);
1498 }
1499
1500
1501 /*
1502 * Take interface offline. This is done by powering down the device, which I
1503 * assume means just shutting down the transceiver and Ethernet logic. This
1504 * requires a _hard_ reset to recover from, as we need to power up again.
1505 */
1506 static void
1507 xe_stop(struct xe_softc *scp) {
1508 int s;
1509
1510 #ifdef XE_DEBUG
1511 device_printf(scp->dev, "stop\n");
1512 #endif
1513
1514 s = splimp();
1515
1516 /*
1517 * Shut off interrupts.
1518 */
1519 xe_disable_intr(scp);
1520
1521 /*
1522 * Power down.
1523 */
1524 XE_SELECT_PAGE(4);
1525 XE_OUTB(XE_GPR1, 0);
1526 XE_SELECT_PAGE(0);
1527
1528 /*
1529 * ~IFF_RUNNING == interface down.
1530 */
1531 scp->ifp->if_flags &= ~IFF_RUNNING;
1532 scp->ifp->if_flags &= ~IFF_OACTIVE;
1533 scp->ifp->if_timer = 0;
1534
1535 (void)splx(s);
1536 }
1537
1538
1539 /*
1540 * Enable Ethernet interrupts from the card.
1541 */
1542 static void
1543 xe_enable_intr(struct xe_softc *scp) {
1544 #ifdef XE_DEBUG
1545 device_printf(scp->dev, "enable_intr\n");
1546 #endif
1547
1548 XE_SELECT_PAGE(1);
1549 XE_OUTB(XE_IMR0, 0xff); /* Unmask everything */
1550 XE_OUTB(XE_IMR1, 0x01); /* Unmask TX underrun detection */
1551 DELAY(1);
1552
1553 XE_SELECT_PAGE(0);
1554 XE_OUTB(XE_CR, XE_CR_ENABLE_INTR); /* Enable interrupts */
1555 if (scp->modem && !scp->dingo) { /* This bit is just magic */
1556 if (!(XE_INB(0x10) & 0x01)) {
1557 XE_OUTB(0x10, 0x11); /* Unmask master int enable bit */
1558 }
1559 }
1560 }
1561
1562
1563 /*
1564 * Disable all Ethernet interrupts from the card.
1565 */
1566 static void
1567 xe_disable_intr(struct xe_softc *scp) {
1568 #ifdef XE_DEBUG
1569 device_printf(scp->dev, "disable_intr\n");
1570 #endif
1571
1572 XE_SELECT_PAGE(0);
1573 XE_OUTB(XE_CR, 0); /* Disable interrupts */
1574 if (scp->modem && !scp->dingo) { /* More magic (does this work?) */
1575 XE_OUTB(0x10, 0x10); /* Mask the master int enable bit */
1576 }
1577
1578 XE_SELECT_PAGE(1);
1579 XE_OUTB(XE_IMR0, 0); /* Forbid all interrupts */
1580 XE_OUTB(XE_IMR1, 0);
1581 XE_SELECT_PAGE(0);
1582 }
1583
1584
1585 /*
1586 * Set up multicast filter and promiscuous mode
1587 */
1588 static void
1589 xe_setmulti(struct xe_softc *scp) {
1590 struct ifnet *ifp;
1591 struct ifmultiaddr *maddr;
1592 int count;
1593
1594 ifp = &scp->arpcom.ac_if;
1595 maddr = ifp->if_multiaddrs.lh_first;
1596
1597 /* Get length of multicast list */
1598 for (count = 0; maddr != NULL; maddr = maddr->ifma_link.le_next, count++);
1599
1600 if ((ifp->if_flags & IFF_PROMISC) || (ifp->if_flags & IFF_ALLMULTI) || (count > 9)) {
1601 /*
1602 * Go into promiscuous mode if either of the PROMISC or ALLMULTI flags are
1603 * set, or if we have been asked to deal with more than 9 multicast
1604 * addresses. To do this: set MPE and PME in SWC1
1605 */
1606 XE_SELECT_PAGE(0x42);
1607 XE_OUTB(XE_SWC1, 0x06);
1608 }
1609 else if ((ifp->if_flags & IFF_MULTICAST) && (count > 0)) {
1610 /*
1611 * Program the filters for up to 9 addresses
1612 */
1613 XE_SELECT_PAGE(0x42);
1614 XE_OUTB(XE_SWC1, 0x01);
1615 XE_SELECT_PAGE(0x40);
1616 XE_OUTB(XE_CMD0, XE_CMD0_OFFLINE);
1617 /*xe_reg_dump(scp);*/
1618 xe_setaddrs(scp);
1619 /*xe_reg_dump(scp);*/
1620 XE_SELECT_PAGE(0x40);
1621 XE_OUTB(XE_CMD0, XE_CMD0_RX_ENABLE|XE_CMD0_ONLINE);
1622 }
1623 else {
1624 /*
1625 * No multicast operation (default)
1626 */
1627 XE_SELECT_PAGE(0x42);
1628 XE_OUTB(XE_SWC1, 0);
1629 }
1630 XE_SELECT_PAGE(0);
1631 }
1632
1633
1634 /*
1635 * Set up all on-chip addresses (for multicast). AFAICS, there are 10
1636 * of these things; the first is our MAC address, the other 9 are mcast
1637 * addresses, padded with the MAC address if there aren't enough.
1638 * XXX - This doesn't work right, but I'm not sure why yet. We seem to be
1639 * XXX - doing much the same as the Linux code, which is weird enough that
1640 * XXX - it's probably right (despite my earlier comments to the contrary).
1641 */
1642 static void
1643 xe_setaddrs(struct xe_softc *scp) {
1644 struct ifmultiaddr *maddr;
1645 u_int8_t *addr;
1646 u_int8_t page, slot, byte, i;
1647
1648 maddr = scp->arpcom.ac_if.if_multiaddrs.lh_first;
1649
1650 XE_SELECT_PAGE(page = 0x50);
1651
1652 for (slot = 0, byte = 8; slot < 10; slot++) {
1653
1654 if (slot == 0)
1655 addr = (u_int8_t *)(&scp->arpcom.ac_enaddr);
1656 else {
1657 while (maddr != NULL && maddr->ifma_addr->sa_family != AF_LINK)
1658 maddr = maddr->ifma_link.le_next;
1659 if (maddr != NULL)
1660 addr = LLADDR((struct sockaddr_dl *)maddr->ifma_addr);
1661 else
1662 addr = (u_int8_t *)(&scp->arpcom.ac_enaddr);
1663 }
1664
1665 for (i = 0; i < 6; i++, byte++) {
1666 #if XE_DEBUG > 2
1667 if (i)
1668 printf(":%x", addr[i]);
1669 else
1670 device_printf(scp->dev, "individual addresses %d: %x", slot, addr[0]);
1671 #endif
1672
1673 if (byte > 15) {
1674 page++;
1675 byte = 8;
1676 XE_SELECT_PAGE(page);
1677 }
1678
1679 if (scp->mohawk)
1680 XE_OUTB(byte, addr[5 - i]);
1681 else
1682 XE_OUTB(byte, addr[i]);
1683 }
1684 #if XE_DEBUG > 2
1685 printf("\n");
1686 #endif
1687 }
1688
1689 XE_SELECT_PAGE(0);
1690 }
1691
1692
1693 /*
1694 * Write an outgoing packet to the card using programmed I/O.
1695 */
1696 static int
1697 xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp) {
1698 struct mbuf *mbp2;
1699 u_int16_t len, pad, free, ok;
1700 u_int8_t *data;
1701 u_int8_t savebyte[2], wantbyte;
1702
1703 /* Get total packet length */
1704 for (len = 0, mbp2 = mbp; mbp2 != NULL; len += mbp2->m_len, mbp2 = mbp2->m_next);
1705
1706 /* Packets < minimum length may need to be padded out */
1707 pad = 0;
1708 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) {
1709 pad = (ETHER_MIN_LEN - ETHER_CRC_LEN - len + 1) >> 1;
1710 len = ETHER_MIN_LEN - ETHER_CRC_LEN;
1711 }
1712
1713 /* Check transmit buffer space */
1714 XE_SELECT_PAGE(0);
1715 XE_OUTW(XE_TRS, len+2);
1716 free = XE_INW(XE_TSO);
1717 ok = free & 0x8000;
1718 free &= 0x7fff;
1719 if (free <= len + 2)
1720 return 1;
1721
1722 /* Send packet length to card */
1723 XE_OUTW(XE_EDP, len);
1724
1725 /*
1726 * Write packet to card using PIO (code stolen from the ed driver)
1727 */
1728 wantbyte = 0;
1729 while (mbp != NULL) {
1730 len = mbp->m_len;
1731 if (len > 0) {
1732 data = mtod(mbp, caddr_t);
1733 if (wantbyte) { /* Finish the last word */
1734 savebyte[1] = *data;
1735 XE_OUTW(XE_EDP, *(u_short *)savebyte);
1736 data++;
1737 len--;
1738 wantbyte = 0;
1739 }
1740 if (len > 1) { /* Output contiguous words */
1741 bus_space_write_multi_2(scp->bst, scp->bsh, XE_EDP, (u_int16_t *) data,
1742 len >> 1);
1743 data += len & ~1;
1744 len &= 1;
1745 }
1746 if (len == 1) { /* Save last byte, if necessary */
1747 savebyte[0] = *data;
1748 wantbyte = 1;
1749 }
1750 }
1751 mbp = mbp->m_next;
1752 }
1753 if (wantbyte) /* Last byte for odd-length packets */
1754 XE_OUTW(XE_EDP, *(u_short *)savebyte);
1755
1756 /*
1757 * For CE3 cards, just tell 'em to send -- apparently the card will pad out
1758 * short packets with random cruft. Otherwise, write nonsense words to fill
1759 * out the packet. I guess it is then sent automatically (?)
1760 */
1761 if (scp->mohawk)
1762 XE_OUTB(XE_CR, XE_CR_TX_PACKET|XE_CR_ENABLE_INTR);
1763 else
1764 while (pad > 0) {
1765 XE_OUTW(XE_EDP, 0xdead);
1766 pad--;
1767 }
1768
1769 return 0;
1770 }
1771
1772 /*
1773 * Compute the 32-bit Ethernet CRC for the given buffer.
1774 */
1775 static u_int32_t
1776 xe_compute_crc(u_int8_t *data, int len) {
1777 u_int32_t crc = 0xffffffff;
1778 u_int32_t poly = 0x04c11db6;
1779 u_int8_t current, crc31, bit;
1780 int i, k;
1781
1782 for (i = 0; i < len; i++) {
1783 current = data[i];
1784 for (k = 1; k <= 8; k++) {
1785 if (crc & 0x80000000) {
1786 crc31 = 0x01;
1787 }
1788 else {
1789 crc31 = 0;
1790 }
1791 bit = crc31 ^ (current & 0x01);
1792 crc <<= 1;
1793 current >>= 1;
1794 if (bit) {
1795 crc = (crc ^ poly)|1;
1796 }
1797 }
1798 }
1799 return crc;
1800 }
1801
1802
1803 /*
1804 * Convert a CRC into an index into the multicast hash table. What we do is
1805 * take the most-significant 6 bits of the CRC, reverse them, and use that as
1806 * the bit number in the hash table. Bits 5:3 of the result give the byte
1807 * within the table (0-7); bits 2:0 give the bit number within that byte (also
1808 * 0-7), ie. the number of shifts needed to get it into the lsb position.
1809 */
1810 static int
1811 xe_compute_hashbit(u_int32_t crc) {
1812 u_int8_t hashbit = 0;
1813 int i;
1814
1815 for (i = 0; i < 6; i++) {
1816 hashbit >>= 1;
1817 if (crc & 0x80000000) {
1818 hashbit &= 0x80;
1819 }
1820 crc <<= 1;
1821 }
1822 return (hashbit >> 2);
1823 }
1824
1825
1826
1827 /**************************************************************
1828 * *
1829 * M I I F U N C T I O N S *
1830 * *
1831 **************************************************************/
1832
1833 /*
1834 * Alternative MII/PHY handling code adapted from the xl driver. It doesn't
1835 * seem to work any better than the xirc2_ps stuff, but it's cleaner code.
1836 * XXX - this stuff shouldn't be here. It should all be abstracted off to
1837 * XXX - some kind of common MII-handling code, shared by all drivers. But
1838 * XXX - that's a whole other mission.
1839 */
1840 #define XE_MII_SET(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) | (x))
1841 #define XE_MII_CLR(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) & ~(x))
1842
1843
1844 /*
1845 * Sync the PHYs by setting data bit and strobing the clock 32 times.
1846 */
1847 static void
1848 xe_mii_sync(struct xe_softc *scp) {
1849 register int i;
1850
1851 XE_SELECT_PAGE(2);
1852 XE_MII_SET(XE_MII_DIR|XE_MII_WRD);
1853
1854 for (i = 0; i < 32; i++) {
1855 XE_MII_SET(XE_MII_CLK);
1856 DELAY(1);
1857 XE_MII_CLR(XE_MII_CLK);
1858 DELAY(1);
1859 }
1860 }
1861
1862
1863 /*
1864 * Look for a MII-compliant PHY. If we find one, reset it.
1865 */
1866 static int
1867 xe_mii_init(struct xe_softc *scp) {
1868 u_int16_t status;
1869
1870 status = xe_phy_readreg(scp, PHY_BMSR);
1871 if ((status & 0xff00) != 0x7800) {
1872 #if XE_DEBUG > 1
1873 device_printf(scp->dev, "no PHY found, %0x\n", status);
1874 #endif
1875 return 0;
1876 }
1877 else {
1878 #if XE_DEBUG > 1
1879 device_printf(scp->dev, "PHY OK!\n");
1880 #endif
1881
1882 /* Reset the PHY */
1883 xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_RESET);
1884 DELAY(500);
1885 while(xe_phy_readreg(scp, PHY_BMCR) & PHY_BMCR_RESET);
1886 XE_MII_DUMP(scp);
1887 return 1;
1888 }
1889 }
1890
1891
1892 /*
1893 * Clock a series of bits through the MII.
1894 */
1895 static void
1896 xe_mii_send(struct xe_softc *scp, u_int32_t bits, int cnt) {
1897 int i;
1898
1899 XE_SELECT_PAGE(2);
1900 XE_MII_CLR(XE_MII_CLK);
1901
1902 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
1903 if (bits & i) {
1904 XE_MII_SET(XE_MII_WRD);
1905 } else {
1906 XE_MII_CLR(XE_MII_WRD);
1907 }
1908 DELAY(1);
1909 XE_MII_CLR(XE_MII_CLK);
1910 DELAY(1);
1911 XE_MII_SET(XE_MII_CLK);
1912 }
1913 }
1914
1915
1916 /*
1917 * Read an PHY register through the MII.
1918 */
1919 static int
1920 xe_mii_readreg(struct xe_softc *scp, struct xe_mii_frame *frame) {
1921 int i, ack, s;
1922
1923 s = splimp();
1924
1925 /*
1926 * Set up frame for RX.
1927 */
1928 frame->mii_stdelim = XE_MII_STARTDELIM;
1929 frame->mii_opcode = XE_MII_READOP;
1930 frame->mii_turnaround = 0;
1931 frame->mii_data = 0;
1932
1933 XE_SELECT_PAGE(2);
1934 XE_OUTB(XE_GPR2, 0);
1935
1936 /*
1937 * Turn on data xmit.
1938 */
1939 XE_MII_SET(XE_MII_DIR);
1940
1941 xe_mii_sync(scp);
1942
1943 /*
1944 * Send command/address info.
1945 */
1946 xe_mii_send(scp, frame->mii_stdelim, 2);
1947 xe_mii_send(scp, frame->mii_opcode, 2);
1948 xe_mii_send(scp, frame->mii_phyaddr, 5);
1949 xe_mii_send(scp, frame->mii_regaddr, 5);
1950
1951 /* Idle bit */
1952 XE_MII_CLR((XE_MII_CLK|XE_MII_WRD));
1953 DELAY(1);
1954 XE_MII_SET(XE_MII_CLK);
1955 DELAY(1);
1956
1957 /* Turn off xmit. */
1958 XE_MII_CLR(XE_MII_DIR);
1959
1960 /* Check for ack */
1961 XE_MII_CLR(XE_MII_CLK);
1962 DELAY(1);
1963 ack = XE_INB(XE_GPR2) & XE_MII_RDD;
1964 XE_MII_SET(XE_MII_CLK);
1965 DELAY(1);
1966
1967 /*
1968 * Now try reading data bits. If the ack failed, we still
1969 * need to clock through 16 cycles to keep the PHY(s) in sync.
1970 */
1971 if (ack) {
1972 for(i = 0; i < 16; i++) {
1973 XE_MII_CLR(XE_MII_CLK);
1974 DELAY(1);
1975 XE_MII_SET(XE_MII_CLK);
1976 DELAY(1);
1977 }
1978 goto fail;
1979 }
1980
1981 for (i = 0x8000; i; i >>= 1) {
1982 XE_MII_CLR(XE_MII_CLK);
1983 DELAY(1);
1984 if (!ack) {
1985 if (XE_INB(XE_GPR2) & XE_MII_RDD)
1986 frame->mii_data |= i;
1987 DELAY(1);
1988 }
1989 XE_MII_SET(XE_MII_CLK);
1990 DELAY(1);
1991 }
1992
1993 fail:
1994
1995 XE_MII_CLR(XE_MII_CLK);
1996 DELAY(1);
1997 XE_MII_SET(XE_MII_CLK);
1998 DELAY(1);
1999
2000 splx(s);
2001
2002 if (ack)
2003 return(1);
2004 return(0);
2005 }
2006
2007
2008 /*
2009 * Write to a PHY register through the MII.
2010 */
2011 static int
2012 xe_mii_writereg(struct xe_softc *scp, struct xe_mii_frame *frame) {
2013 int s;
2014
2015 s = splimp();
2016
2017 /*
2018 * Set up frame for TX.
2019 */
2020 frame->mii_stdelim = XE_MII_STARTDELIM;
2021 frame->mii_opcode = XE_MII_WRITEOP;
2022 frame->mii_turnaround = XE_MII_TURNAROUND;
2023
2024 XE_SELECT_PAGE(2);
2025
2026 /*
2027 * Turn on data output.
2028 */
2029 XE_MII_SET(XE_MII_DIR);
2030
2031 xe_mii_sync(scp);
2032
2033 xe_mii_send(scp, frame->mii_stdelim, 2);
2034 xe_mii_send(scp, frame->mii_opcode, 2);
2035 xe_mii_send(scp, frame->mii_phyaddr, 5);
2036 xe_mii_send(scp, frame->mii_regaddr, 5);
2037 xe_mii_send(scp, frame->mii_turnaround, 2);
2038 xe_mii_send(scp, frame->mii_data, 16);
2039
2040 /* Idle bit. */
2041 XE_MII_SET(XE_MII_CLK);
2042 DELAY(1);
2043 XE_MII_CLR(XE_MII_CLK);
2044 DELAY(1);
2045
2046 /*
2047 * Turn off xmit.
2048 */
2049 XE_MII_CLR(XE_MII_DIR);
2050
2051 splx(s);
2052
2053 return(0);
2054 }
2055
2056
2057 /*
2058 * Read a register from the PHY.
2059 */
2060 static u_int16_t
2061 xe_phy_readreg(struct xe_softc *scp, u_int16_t reg) {
2062 struct xe_mii_frame frame;
2063
2064 bzero((char *)&frame, sizeof(frame));
2065
2066 frame.mii_phyaddr = 0;
2067 frame.mii_regaddr = reg;
2068 xe_mii_readreg(scp, &frame);
2069
2070 return(frame.mii_data);
2071 }
2072
2073
2074 /*
2075 * Write to a PHY register.
2076 */
2077 static void
2078 xe_phy_writereg(struct xe_softc *scp, u_int16_t reg, u_int16_t data) {
2079 struct xe_mii_frame frame;
2080
2081 bzero((char *)&frame, sizeof(frame));
2082
2083 frame.mii_phyaddr = 0;
2084 frame.mii_regaddr = reg;
2085 frame.mii_data = data;
2086 xe_mii_writereg(scp, &frame);
2087
2088 return;
2089 }
2090
2091
2092 #ifdef XE_DEBUG
2093 /*
2094 * A bit of debugging code.
2095 */
2096 static void
2097 xe_mii_dump(struct xe_softc *scp) {
2098 int i, s;
2099
2100 s = splimp();
2101
2102 device_printf(scp->dev, "MII registers: ");
2103 for (i = 0; i < 2; i++) {
2104 printf(" %d:%04x", i, xe_phy_readreg(scp, i));
2105 }
2106 for (i = 4; i < 7; i++) {
2107 printf(" %d:%04x", i, xe_phy_readreg(scp, i));
2108 }
2109 printf("\n");
2110
2111 (void)splx(s);
2112 }
2113
2114 static void
2115 xe_reg_dump(struct xe_softc *scp) {
2116 int page, i, s;
2117
2118 s = splimp();
2119
2120 device_printf(scp->dev, "Common registers: ");
2121 for (i = 0; i < 8; i++) {
2122 printf(" %2.2x", XE_INB(i));
2123 }
2124 printf("\n");
2125
2126 for (page = 0; page <= 8; page++) {
2127 device_printf(scp->dev, "Register page %2.2x: ", page);
2128 XE_SELECT_PAGE(page);
2129 for (i = 8; i < 16; i++) {
2130 printf(" %2.2x", XE_INB(i));
2131 }
2132 printf("\n");
2133 }
2134
2135 for (page = 0x10; page < 0x5f; page++) {
2136 if ((page >= 0x11 && page <= 0x3f) ||
2137 (page == 0x41) ||
2138 (page >= 0x43 && page <= 0x4f) ||
2139 (page >= 0x59))
2140 continue;
2141 device_printf(scp->dev, "Register page %2.2x: ", page);
2142 XE_SELECT_PAGE(page);
2143 for (i = 8; i < 16; i++) {
2144 printf(" %2.2x", XE_INB(i));
2145 }
2146 printf("\n");
2147 }
2148
2149 (void)splx(s);
2150 }
2151 #endif
2152
2153 int
2154 xe_activate(device_t dev)
2155 {
2156 struct xe_softc *sc = device_get_softc(dev);
2157 int start, err;
2158
2159 if (!sc->dingo) {
2160 sc->port_rid = 0; /* 0 is managed by pccard */
2161 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
2162 &sc->port_rid, 0, ~0, 16, RF_ACTIVE);
2163 } else {
2164 /*
2165 * Find a 16 byte aligned ioport for the card.
2166 */
2167 #if XE_DEBUG > 0
2168 device_printf(dev, "Finding an aligned port for RealPort\n");
2169 #endif /* XE_DEBUG */
2170 sc->port_rid = 1; /* 0 is managed by pccard */
2171 start = 0x100;
2172 do {
2173 sc->port_res = bus_alloc_resource(dev,
2174 SYS_RES_IOPORT, &sc->port_rid, start, 0x3ff, 16,
2175 RF_ACTIVE);
2176 if (sc->port_res == 0)
2177 break; /* we failed */
2178 if ((rman_get_start(sc->port_res) & 0xf) == 0)
2179 break; /* good */
2180 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
2181 sc->port_res);
2182 start = (rman_get_start(sc->port_res) + 15) & ~0xf;
2183 } while (1);
2184 #if XE_DEBUG > 2
2185 device_printf(dev, "port 0x%0lx, size 0x%0lx\n",
2186 bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
2187 bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid));
2188 #endif /* XE_DEBUG */
2189 }
2190 if (!sc->port_res) {
2191 #if XE_DEBUG > 0
2192 device_printf(dev, "Cannot allocate ioport\n");
2193 #endif
2194 return ENOMEM;
2195 }
2196
2197 sc->irq_rid = 0;
2198 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid,
2199 0, ~0, 1, RF_ACTIVE);
2200 if (!sc->irq_res) {
2201 #if XE_DEBUG > 0
2202 device_printf(dev, "Cannot allocate irq\n");
2203 #endif
2204 xe_deactivate(dev);
2205 return ENOMEM;
2206 }
2207 if ((err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, xe_intr, sc,
2208 &sc->intrhand)) != 0) {
2209 xe_deactivate(dev);
2210 return err;
2211 }
2212
2213 sc->bst = rman_get_bustag(sc->port_res);
2214 sc->bsh = rman_get_bushandle(sc->port_res);
2215 return (0);
2216 }
2217
2218 void
2219 xe_deactivate(device_t dev)
2220 {
2221 struct xe_softc *sc = device_get_softc(dev);
2222
2223 if (sc->intrhand)
2224 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
2225 sc->intrhand = 0;
2226 if (sc->port_res)
2227 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
2228 sc->port_res);
2229 sc->port_res = 0;
2230 if (sc->irq_res)
2231 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
2232 sc->irq_res);
2233 sc->irq_res = 0;
2234 return;
2235 }
2236
2237 static device_method_t xe_pccard_methods[] = {
2238 /* Device interface */
2239 DEVMETHOD(device_probe, xe_probe),
2240 DEVMETHOD(device_attach, xe_attach),
2241 DEVMETHOD(device_detach, xe_detach),
2242
2243 { 0, 0 }
2244 };
2245
2246 static driver_t xe_pccard_driver = {
2247 "xe",
2248 xe_pccard_methods,
2249 sizeof(struct xe_softc),
2250 };
2251
2252 devclass_t xe_devclass;
2253
2254 DRIVER_MODULE(xe, pccard, xe_pccard_driver, xe_devclass, 0, 0);
Cache object: e67a5809306641f2d3d199327e833217
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