1 | /* $NetBSD: mb86960.c,v 1.83 2016/06/10 13:27:13 ozaki-r Exp $ */ |
2 | |
3 | /* |
4 | * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 |
5 | * |
6 | * This software may be used, modified, copied, distributed, and sold, in |
7 | * both source and binary form provided that the above copyright, these |
8 | * terms and the following disclaimer are retained. The name of the author |
9 | * and/or the contributor may not be used to endorse or promote products |
10 | * derived from this software without specific prior written permission. |
11 | * |
12 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND |
13 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
14 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
15 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE |
16 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
17 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
18 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION. |
19 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
20 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
21 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
22 | * SUCH DAMAGE. |
23 | */ |
24 | |
25 | /* |
26 | * Portions copyright (C) 1993, David Greenman. This software may be used, |
27 | * modified, copied, distributed, and sold, in both source and binary form |
28 | * provided that the above copyright and these terms are retained. Under no |
29 | * circumstances is the author responsible for the proper functioning of this |
30 | * software, nor does the author assume any responsibility for damages |
31 | * incurred with its use. |
32 | */ |
33 | |
34 | #include <sys/cdefs.h> |
35 | __KERNEL_RCSID(0, "$NetBSD: mb86960.c,v 1.83 2016/06/10 13:27:13 ozaki-r Exp $" ); |
36 | |
37 | /* |
38 | * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards. |
39 | * Contributed by M.S. <seki@sysrap.cs.fujitsu.co.jp> |
40 | * |
41 | * This version is intended to be a generic template for various |
42 | * MB86960A/MB86965A based Ethernet cards. It currently supports |
43 | * Fujitsu FMV-180 series (i.e., FMV-181 and FMV-182) and Allied- |
44 | * Telesis AT1700 series and RE2000 series. There are some |
45 | * unnecessary hooks embedded, which are primarily intended to support |
46 | * other types of Ethernet cards, but the author is not sure whether |
47 | * they are useful. |
48 | */ |
49 | |
50 | #include "opt_inet.h" |
51 | |
52 | #include <sys/param.h> |
53 | #include <sys/systm.h> |
54 | #include <sys/errno.h> |
55 | #include <sys/ioctl.h> |
56 | #include <sys/mbuf.h> |
57 | #include <sys/socket.h> |
58 | #include <sys/syslog.h> |
59 | #include <sys/device.h> |
60 | #include <sys/rndsource.h> |
61 | |
62 | #include <net/if.h> |
63 | #include <net/if_dl.h> |
64 | #include <net/if_types.h> |
65 | #include <net/if_media.h> |
66 | #include <net/if_ether.h> |
67 | |
68 | #ifdef INET |
69 | #include <netinet/in.h> |
70 | #include <netinet/in_systm.h> |
71 | #include <netinet/in_var.h> |
72 | #include <netinet/ip.h> |
73 | #include <netinet/if_inarp.h> |
74 | #endif |
75 | |
76 | |
77 | #include <net/bpf.h> |
78 | #include <net/bpfdesc.h> |
79 | |
80 | #include <sys/bus.h> |
81 | |
82 | #include <dev/ic/mb86960reg.h> |
83 | #include <dev/ic/mb86960var.h> |
84 | |
85 | #ifndef __BUS_SPACE_HAS_STREAM_METHODS |
86 | #define bus_space_write_stream_2 bus_space_write_2 |
87 | #define bus_space_write_multi_stream_2 bus_space_write_multi_2 |
88 | #define bus_space_read_multi_stream_2 bus_space_read_multi_2 |
89 | #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ |
90 | |
91 | /* Standard driver entry points. These can be static. */ |
92 | void mb86960_init(struct mb86960_softc *); |
93 | int mb86960_ioctl(struct ifnet *, u_long, void *); |
94 | void mb86960_start(struct ifnet *); |
95 | void mb86960_reset(struct mb86960_softc *); |
96 | void mb86960_watchdog(struct ifnet *); |
97 | |
98 | /* Local functions. Order of declaration is confused. FIXME. */ |
99 | int mb86960_get_packet(struct mb86960_softc *, u_int); |
100 | void mb86960_stop(struct mb86960_softc *); |
101 | void mb86960_tint(struct mb86960_softc *, uint8_t); |
102 | void mb86960_rint(struct mb86960_softc *, uint8_t); |
103 | static inline |
104 | void mb86960_xmit(struct mb86960_softc *); |
105 | void mb86960_write_mbufs(struct mb86960_softc *, struct mbuf *); |
106 | static inline |
107 | void mb86960_droppacket(struct mb86960_softc *); |
108 | void mb86960_getmcaf(struct ethercom *, uint8_t *); |
109 | void mb86960_setmode(struct mb86960_softc *); |
110 | void mb86960_loadmar(struct mb86960_softc *); |
111 | |
112 | int mb86960_mediachange(struct ifnet *); |
113 | void mb86960_mediastatus(struct ifnet *, struct ifmediareq *); |
114 | |
115 | #if FE_DEBUG >= 1 |
116 | void mb86960_dump(int, struct mb86960_softc *); |
117 | #endif |
118 | |
119 | void |
120 | mb86960_attach(struct mb86960_softc *sc, uint8_t *myea) |
121 | { |
122 | bus_space_tag_t bst = sc->sc_bst; |
123 | bus_space_handle_t bsh = sc->sc_bsh; |
124 | |
125 | /* Register values which depend on board design. */ |
126 | sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; |
127 | sc->proto_dlcr5 = 0; |
128 | sc->proto_dlcr7 = FE_D7_BYTSWP_LH; |
129 | if ((sc->sc_flags & FE_FLAGS_MB86960) != 0) |
130 | sc->proto_dlcr7 |= FE_D7_ED_TEST; /* XXX */ |
131 | sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO; |
132 | |
133 | /* |
134 | * Program the 86960 as following defaults: |
135 | * SRAM: 32KB, 100ns, byte-wide access. |
136 | * Transmission buffer: 4KB x 2. |
137 | * System bus interface: 16 bits. |
138 | * These values except TXBSIZE should be modified as per |
139 | * sc_flags which is set in MD attachments, because they |
140 | * are hard-wired on the board. Modifying TXBSIZE will affect |
141 | * the driver performance. |
142 | */ |
143 | sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB | |
144 | FE_D6_BBW_BYTE | FE_D6_SRAM_100ns; |
145 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) |
146 | sc->proto_dlcr6 |= FE_D6_SBW_BYTE; |
147 | if (sc->sc_flags & FE_FLAGS_SRAM_150ns) |
148 | sc->proto_dlcr6 &= ~FE_D6_SRAM_100ns; |
149 | |
150 | /* |
151 | * Minimum initialization of the hardware. |
152 | * We write into registers; hope I/O ports have no |
153 | * overlap with other boards. |
154 | */ |
155 | |
156 | /* Initialize 86960. */ |
157 | bus_space_write_1(bst, bsh, FE_DLCR6, |
158 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
159 | delay(200); |
160 | |
161 | #ifdef DIAGNOSTIC |
162 | if (myea == NULL) { |
163 | aprint_error_dev(sc->sc_dev, |
164 | "ethernet address shouldn't be NULL\n" ); |
165 | panic("NULL ethernet address" ); |
166 | } |
167 | #endif |
168 | memcpy(sc->sc_enaddr, myea, sizeof(sc->sc_enaddr)); |
169 | |
170 | /* Disable all interrupts. */ |
171 | bus_space_write_1(bst, bsh, FE_DLCR2, 0); |
172 | bus_space_write_1(bst, bsh, FE_DLCR3, 0); |
173 | } |
174 | |
175 | /* |
176 | * Install interface into kernel networking data structures |
177 | */ |
178 | void |
179 | mb86960_config(struct mb86960_softc *sc, int *media, int nmedia, int defmedia) |
180 | { |
181 | cfdata_t cf = device_cfdata(sc->sc_dev); |
182 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
183 | int i; |
184 | |
185 | /* Stop the 86960. */ |
186 | mb86960_stop(sc); |
187 | |
188 | /* Initialize ifnet structure. */ |
189 | strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); |
190 | ifp->if_softc = sc; |
191 | ifp->if_start = mb86960_start; |
192 | ifp->if_ioctl = mb86960_ioctl; |
193 | ifp->if_watchdog = mb86960_watchdog; |
194 | ifp->if_flags = |
195 | IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; |
196 | IFQ_SET_READY(&ifp->if_snd); |
197 | |
198 | #if FE_DEBUG >= 3 |
199 | log(LOG_INFO, "%s: mb86960_config()\n" , device_xname(sc->sc_dev)); |
200 | mb86960_dump(LOG_INFO, sc); |
201 | #endif |
202 | |
203 | #if FE_SINGLE_TRANSMISSION |
204 | /* Override txb config to allocate minimum. */ |
205 | sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; |
206 | sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; |
207 | #endif |
208 | |
209 | /* Modify hardware config if it is requested. */ |
210 | if ((cf->cf_flags & FE_FLAGS_OVERRIDE_DLCR6) != 0) |
211 | sc->proto_dlcr6 = cf->cf_flags & FE_FLAGS_DLCR6_VALUE; |
212 | |
213 | /* Find TX buffer size, based on the hardware dependent proto. */ |
214 | switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { |
215 | case FE_D6_TXBSIZ_2x2KB: |
216 | sc->txb_size = 2048; |
217 | break; |
218 | case FE_D6_TXBSIZ_2x4KB: |
219 | sc->txb_size = 4096; |
220 | break; |
221 | case FE_D6_TXBSIZ_2x8KB: |
222 | sc->txb_size = 8192; |
223 | break; |
224 | default: |
225 | /* Oops, we can't work with single buffer configuration. */ |
226 | #if FE_DEBUG >= 2 |
227 | log(LOG_WARNING, "%s: strange TXBSIZ config; fixing\n" , |
228 | device_xname(sc->sc_dev)); |
229 | #endif |
230 | sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; |
231 | sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; |
232 | sc->txb_size = 2048; |
233 | break; |
234 | } |
235 | |
236 | /* Initialize media goo. */ |
237 | ifmedia_init(&sc->sc_media, 0, mb86960_mediachange, |
238 | mb86960_mediastatus); |
239 | if (media != NULL) { |
240 | for (i = 0; i < nmedia; i++) |
241 | ifmedia_add(&sc->sc_media, media[i], 0, NULL); |
242 | ifmedia_set(&sc->sc_media, defmedia); |
243 | } else { |
244 | ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); |
245 | ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); |
246 | } |
247 | |
248 | /* Attach the interface. */ |
249 | if_attach(ifp); |
250 | ether_ifattach(ifp, sc->sc_enaddr); |
251 | |
252 | rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), |
253 | RND_TYPE_NET, RND_FLAG_DEFAULT); |
254 | |
255 | /* Print additional info when attached. */ |
256 | aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n" , |
257 | ether_sprintf(sc->sc_enaddr)); |
258 | |
259 | #if FE_DEBUG >= 3 |
260 | { |
261 | int buf, txb, bbw, sbw, ram; |
262 | |
263 | buf = txb = bbw = sbw = ram = -1; |
264 | switch (sc->proto_dlcr6 & FE_D6_BUFSIZ) { |
265 | case FE_D6_BUFSIZ_8KB: |
266 | buf = 8; |
267 | break; |
268 | case FE_D6_BUFSIZ_16KB: |
269 | buf = 16; |
270 | break; |
271 | case FE_D6_BUFSIZ_32KB: |
272 | buf = 32; |
273 | break; |
274 | case FE_D6_BUFSIZ_64KB: |
275 | buf = 64; |
276 | break; |
277 | } |
278 | switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { |
279 | case FE_D6_TXBSIZ_2x2KB: |
280 | txb = 2; |
281 | break; |
282 | case FE_D6_TXBSIZ_2x4KB: |
283 | txb = 4; |
284 | break; |
285 | case FE_D6_TXBSIZ_2x8KB: |
286 | txb = 8; |
287 | break; |
288 | } |
289 | switch (sc->proto_dlcr6 & FE_D6_BBW) { |
290 | case FE_D6_BBW_BYTE: |
291 | bbw = 8; |
292 | break; |
293 | case FE_D6_BBW_WORD: |
294 | bbw = 16; |
295 | break; |
296 | } |
297 | switch (sc->proto_dlcr6 & FE_D6_SBW) { |
298 | case FE_D6_SBW_BYTE: |
299 | sbw = 8; |
300 | break; |
301 | case FE_D6_SBW_WORD: |
302 | sbw = 16; |
303 | break; |
304 | } |
305 | switch (sc->proto_dlcr6 & FE_D6_SRAM) { |
306 | case FE_D6_SRAM_100ns: |
307 | ram = 100; |
308 | break; |
309 | case FE_D6_SRAM_150ns: |
310 | ram = 150; |
311 | break; |
312 | } |
313 | aprint_debug_dev(sc->sc_dev, |
314 | "SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n" , |
315 | buf, bbw, ram, txb, sbw); |
316 | } |
317 | #endif |
318 | |
319 | /* The attach is successful. */ |
320 | sc->sc_stat |= FE_STAT_ATTACHED; |
321 | } |
322 | |
323 | /* |
324 | * Media change callback. |
325 | */ |
326 | int |
327 | mb86960_mediachange(struct ifnet *ifp) |
328 | { |
329 | struct mb86960_softc *sc = ifp->if_softc; |
330 | |
331 | if (sc->sc_mediachange) |
332 | return (*sc->sc_mediachange)(sc); |
333 | return 0; |
334 | } |
335 | |
336 | /* |
337 | * Media status callback. |
338 | */ |
339 | void |
340 | mb86960_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) |
341 | { |
342 | struct mb86960_softc *sc = ifp->if_softc; |
343 | |
344 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0) { |
345 | ifmr->ifm_active = IFM_ETHER | IFM_NONE; |
346 | ifmr->ifm_status = 0; |
347 | return; |
348 | } |
349 | |
350 | if (sc->sc_mediastatus) |
351 | (*sc->sc_mediastatus)(sc, ifmr); |
352 | } |
353 | |
354 | /* |
355 | * Reset interface. |
356 | */ |
357 | void |
358 | mb86960_reset(struct mb86960_softc *sc) |
359 | { |
360 | int s; |
361 | |
362 | s = splnet(); |
363 | mb86960_stop(sc); |
364 | mb86960_init(sc); |
365 | splx(s); |
366 | } |
367 | |
368 | /* |
369 | * Stop everything on the interface. |
370 | * |
371 | * All buffered packets, both transmitting and receiving, |
372 | * if any, will be lost by stopping the interface. |
373 | */ |
374 | void |
375 | mb86960_stop(struct mb86960_softc *sc) |
376 | { |
377 | bus_space_tag_t bst = sc->sc_bst; |
378 | bus_space_handle_t bsh = sc->sc_bsh; |
379 | |
380 | #if FE_DEBUG >= 3 |
381 | log(LOG_INFO, "%s: top of mb86960_stop()\n" , device_xname(sc->sc_dev)); |
382 | mb86960_dump(LOG_INFO, sc); |
383 | #endif |
384 | |
385 | /* Disable interrupts. */ |
386 | bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); |
387 | bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); |
388 | |
389 | /* Stop interface hardware. */ |
390 | delay(200); |
391 | bus_space_write_1(bst, bsh, FE_DLCR6, |
392 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
393 | delay(200); |
394 | |
395 | /* Clear all interrupt status. */ |
396 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); |
397 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); |
398 | |
399 | /* Put the chip in stand-by mode. */ |
400 | delay(200); |
401 | bus_space_write_1(bst, bsh, FE_DLCR7, |
402 | sc->proto_dlcr7 | FE_D7_POWER_DOWN); |
403 | delay(200); |
404 | |
405 | /* MAR loading can be delayed. */ |
406 | sc->filter_change = 0; |
407 | |
408 | /* Call a hook. */ |
409 | if (sc->stop_card) |
410 | (*sc->stop_card)(sc); |
411 | |
412 | #if FE_DEBUG >= 3 |
413 | log(LOG_INFO, "%s: end of mb86960_stop()\n" , device_xname(sc->sc_dev)); |
414 | mb86960_dump(LOG_INFO, sc); |
415 | #endif |
416 | } |
417 | |
418 | /* |
419 | * Device timeout/watchdog routine. Entered if the device neglects to |
420 | * generate an interrupt after a transmit has been started on it. |
421 | */ |
422 | void |
423 | mb86960_watchdog(struct ifnet *ifp) |
424 | { |
425 | struct mb86960_softc *sc = ifp->if_softc; |
426 | |
427 | log(LOG_ERR, "%s: device timeout\n" , device_xname(sc->sc_dev)); |
428 | #if FE_DEBUG >= 3 |
429 | mb86960_dump(LOG_INFO, sc); |
430 | #endif |
431 | |
432 | /* Record how many packets are lost by this accident. */ |
433 | sc->sc_ec.ec_if.if_oerrors += sc->txb_sched + sc->txb_count; |
434 | |
435 | mb86960_reset(sc); |
436 | } |
437 | |
438 | /* |
439 | * Drop (skip) a packet from receive buffer in 86960 memory. |
440 | */ |
441 | static inline void |
442 | mb86960_droppacket(struct mb86960_softc *sc) |
443 | { |
444 | bus_space_tag_t bst = sc->sc_bst; |
445 | bus_space_handle_t bsh = sc->sc_bsh; |
446 | |
447 | bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP); |
448 | } |
449 | |
450 | /* |
451 | * Initialize device. |
452 | */ |
453 | void |
454 | mb86960_init(struct mb86960_softc *sc) |
455 | { |
456 | bus_space_tag_t bst = sc->sc_bst; |
457 | bus_space_handle_t bsh = sc->sc_bsh; |
458 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
459 | int i; |
460 | |
461 | #if FE_DEBUG >= 3 |
462 | log(LOG_INFO, "%s: top of mb86960_init()\n" , device_xname(sc->sc_dev)); |
463 | mb86960_dump(LOG_INFO, sc); |
464 | #endif |
465 | |
466 | /* Reset transmitter flags. */ |
467 | ifp->if_flags &= ~IFF_OACTIVE; |
468 | ifp->if_timer = 0; |
469 | |
470 | sc->txb_free = sc->txb_size; |
471 | sc->txb_count = 0; |
472 | sc->txb_sched = 0; |
473 | |
474 | /* Do any card-specific initialization, if applicable. */ |
475 | if (sc->init_card) |
476 | (*sc->init_card)(sc); |
477 | |
478 | #if FE_DEBUG >= 3 |
479 | log(LOG_INFO, "%s: after init hook\n" , device_xname(sc->sc_dev)); |
480 | mb86960_dump(LOG_INFO, sc); |
481 | #endif |
482 | |
483 | /* |
484 | * Make sure to disable the chip, also. |
485 | * This may also help re-programming the chip after |
486 | * hot insertion of PCMCIAs. |
487 | */ |
488 | bus_space_write_1(bst, bsh, FE_DLCR6, |
489 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
490 | delay(200); |
491 | |
492 | /* Power up the chip and select register bank for DLCRs. */ |
493 | bus_space_write_1(bst, bsh, FE_DLCR7, |
494 | sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP); |
495 | delay(200); |
496 | |
497 | /* Feed the station address. */ |
498 | bus_space_write_region_1(bst, bsh, FE_DLCR8, |
499 | sc->sc_enaddr, ETHER_ADDR_LEN); |
500 | |
501 | /* Select the BMPR bank for runtime register access. */ |
502 | bus_space_write_1(bst, bsh, FE_DLCR7, |
503 | sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); |
504 | |
505 | /* Initialize registers. */ |
506 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ |
507 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ |
508 | bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); |
509 | bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); |
510 | bus_space_write_1(bst, bsh, FE_DLCR4, sc->proto_dlcr4); |
511 | bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5); |
512 | bus_space_write_1(bst, bsh, FE_BMPR10, 0x00); |
513 | bus_space_write_1(bst, bsh, FE_BMPR11, FE_B11_CTRL_SKIP); |
514 | bus_space_write_1(bst, bsh, FE_BMPR12, 0x00); |
515 | bus_space_write_1(bst, bsh, FE_BMPR13, sc->proto_bmpr13); |
516 | bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER); |
517 | bus_space_write_1(bst, bsh, FE_BMPR15, 0x00); |
518 | |
519 | #if FE_DEBUG >= 3 |
520 | log(LOG_INFO, "%s: just before enabling DLC\n" , |
521 | device_xname(sc->sc_dev)); |
522 | mb86960_dump(LOG_INFO, sc); |
523 | #endif |
524 | |
525 | /* Enable interrupts. */ |
526 | bus_space_write_1(bst, bsh, FE_DLCR2, FE_TMASK); |
527 | bus_space_write_1(bst, bsh, FE_DLCR3, FE_RMASK); |
528 | |
529 | /* Enable transmitter and receiver. */ |
530 | delay(200); |
531 | bus_space_write_1(bst, bsh, FE_DLCR6, |
532 | sc->proto_dlcr6 | FE_D6_DLC_ENABLE); |
533 | delay(200); |
534 | |
535 | #if FE_DEBUG >= 3 |
536 | log(LOG_INFO, "%s: just after enabling DLC\n" , |
537 | device_xname(sc->sc_dev)); |
538 | mb86960_dump(LOG_INFO, sc); |
539 | #endif |
540 | |
541 | /* |
542 | * Make sure to empty the receive buffer. |
543 | * |
544 | * This may be redundant, but *if* the receive buffer were full |
545 | * at this point, the driver would hang. I have experienced |
546 | * some strange hangups just after UP. I hope the following |
547 | * code solve the problem. |
548 | * |
549 | * I have changed the order of hardware initialization. |
550 | * I think the receive buffer cannot have any packets at this |
551 | * point in this version. The following code *must* be |
552 | * redundant now. FIXME. |
553 | */ |
554 | for (i = 0; i < FE_MAX_RECV_COUNT; i++) { |
555 | if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) |
556 | break; |
557 | mb86960_droppacket(sc); |
558 | } |
559 | #if FE_DEBUG >= 1 |
560 | if (i >= FE_MAX_RECV_COUNT) |
561 | log(LOG_ERR, "%s: cannot empty receive buffer\n" , |
562 | device_xname(sc->sc_dev)); |
563 | #endif |
564 | #if FE_DEBUG >= 3 |
565 | if (i < FE_MAX_RECV_COUNT) |
566 | log(LOG_INFO, "%s: receive buffer emptied (%d)\n" , |
567 | device_xname(sc->sc_dev), i); |
568 | #endif |
569 | |
570 | #if FE_DEBUG >= 3 |
571 | log(LOG_INFO, "%s: after ERB loop\n" , device_xname(sc->sc_dev)); |
572 | mb86960_dump(LOG_INFO, sc); |
573 | #endif |
574 | |
575 | /* Do we need this here? */ |
576 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ |
577 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ |
578 | |
579 | #if FE_DEBUG >= 3 |
580 | log(LOG_INFO, "%s: after FIXME\n" , device_xname(sc->sc_dev)); |
581 | mb86960_dump(LOG_INFO, sc); |
582 | #endif |
583 | |
584 | /* Set 'running' flag. */ |
585 | ifp->if_flags |= IFF_RUNNING; |
586 | |
587 | /* |
588 | * At this point, the interface is runnung properly, |
589 | * except that it receives *no* packets. we then call |
590 | * mb86960_setmode() to tell the chip what packets to be |
591 | * received, based on the if_flags and multicast group |
592 | * list. It completes the initialization process. |
593 | */ |
594 | mb86960_setmode(sc); |
595 | |
596 | #if FE_DEBUG >= 3 |
597 | log(LOG_INFO, "%s: after setmode\n" , device_xname(sc->sc_dev)); |
598 | mb86960_dump(LOG_INFO, sc); |
599 | #endif |
600 | |
601 | /* ...and attempt to start output. */ |
602 | mb86960_start(ifp); |
603 | |
604 | #if FE_DEBUG >= 3 |
605 | log(LOG_INFO, "%s: end of mb86960_init()\n" , device_xname(sc->sc_dev)); |
606 | mb86960_dump(LOG_INFO, sc); |
607 | #endif |
608 | } |
609 | |
610 | /* |
611 | * This routine actually starts the transmission on the interface |
612 | */ |
613 | static inline void |
614 | mb86960_xmit(struct mb86960_softc *sc) |
615 | { |
616 | bus_space_tag_t bst = sc->sc_bst; |
617 | bus_space_handle_t bsh = sc->sc_bsh; |
618 | |
619 | /* |
620 | * Set a timer just in case we never hear from the board again. |
621 | * We use longer timeout for multiple packet transmission. |
622 | * I'm not sure this timer value is appropriate. FIXME. |
623 | */ |
624 | sc->sc_ec.ec_if.if_timer = 1 + sc->txb_count; |
625 | |
626 | /* Update txb variables. */ |
627 | sc->txb_sched = sc->txb_count; |
628 | sc->txb_count = 0; |
629 | sc->txb_free = sc->txb_size; |
630 | |
631 | #if FE_DELAYED_PADDING |
632 | /* Omit the postponed padding process. */ |
633 | sc->txb_padding = 0; |
634 | #endif |
635 | |
636 | /* Start transmitter, passing packets in TX buffer. */ |
637 | bus_space_write_1(bst, bsh, FE_BMPR10, sc->txb_sched | FE_B10_START); |
638 | } |
639 | |
640 | /* |
641 | * Start output on interface. |
642 | * We make two assumptions here: |
643 | * 1) that the current priority is set to splnet _before_ this code |
644 | * is called *and* is returned to the appropriate priority after |
645 | * return |
646 | * 2) that the IFF_OACTIVE flag is checked before this code is called |
647 | * (i.e. that the output part of the interface is idle) |
648 | */ |
649 | void |
650 | mb86960_start(struct ifnet *ifp) |
651 | { |
652 | struct mb86960_softc *sc = ifp->if_softc; |
653 | struct mbuf *m; |
654 | |
655 | #if FE_DEBUG >= 1 |
656 | /* Just a sanity check. */ |
657 | if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) { |
658 | /* |
659 | * Txb_count and txb_free co-works to manage the |
660 | * transmission buffer. Txb_count keeps track of the |
661 | * used potion of the buffer, while txb_free does unused |
662 | * potion. So, as long as the driver runs properly, |
663 | * txb_count is zero if and only if txb_free is same |
664 | * as txb_size (which represents whole buffer.) |
665 | */ |
666 | log(LOG_ERR, "%s: inconsistent txb variables (%d, %d)\n" , |
667 | device_xname(sc->sc_dev), sc->txb_count, sc->txb_free); |
668 | /* |
669 | * So, what should I do, then? |
670 | * |
671 | * We now know txb_count and txb_free contradicts. We |
672 | * cannot, however, tell which is wrong. More |
673 | * over, we cannot peek 86960 transmission buffer or |
674 | * reset the transmission buffer. (In fact, we can |
675 | * reset the entire interface. I don't want to do it.) |
676 | * |
677 | * If txb_count is incorrect, leaving it as is will cause |
678 | * sending of garbage after the next interrupt. We have to |
679 | * avoid it. Hence, we reset the txb_count here. If |
680 | * txb_free was incorrect, resetting txb_count just loose |
681 | * some packets. We can live with it. |
682 | */ |
683 | sc->txb_count = 0; |
684 | } |
685 | #endif |
686 | |
687 | #if FE_DEBUG >= 1 |
688 | /* |
689 | * First, see if there are buffered packets and an idle |
690 | * transmitter - should never happen at this point. |
691 | */ |
692 | if ((sc->txb_count > 0) && (sc->txb_sched == 0)) { |
693 | log(LOG_ERR, "%s: transmitter idle with %d buffered packets\n" , |
694 | device_xname(sc->sc_dev), sc->txb_count); |
695 | mb86960_xmit(sc); |
696 | } |
697 | #endif |
698 | |
699 | /* |
700 | * Stop accepting more transmission packets temporarily, when |
701 | * a filter change request is delayed. Updating the MARs on |
702 | * 86960 flushes the transmisstion buffer, so it is delayed |
703 | * until all buffered transmission packets have been sent |
704 | * out. |
705 | */ |
706 | if (sc->filter_change) { |
707 | /* |
708 | * Filter change request is delayed only when the DLC is |
709 | * working. DLC soon raise an interrupt after finishing |
710 | * the work. |
711 | */ |
712 | goto indicate_active; |
713 | } |
714 | |
715 | for (;;) { |
716 | /* |
717 | * See if there is room to put another packet in the buffer. |
718 | * We *could* do better job by peeking the send queue to |
719 | * know the length of the next packet. Current version just |
720 | * tests against the worst case (i.e., longest packet). FIXME. |
721 | * |
722 | * When adding the packet-peek feature, don't forget adding a |
723 | * test on txb_count against QUEUEING_MAX. |
724 | * There is a little chance the packet count exceeds |
725 | * the limit. Assume transmission buffer is 8KB (2x8KB |
726 | * configuration) and an application sends a bunch of small |
727 | * (i.e., minimum packet sized) packets rapidly. An 8KB |
728 | * buffer can hold 130 blocks of 62 bytes long... |
729 | */ |
730 | if (sc->txb_free < |
731 | (ETHER_MAX_LEN - ETHER_CRC_LEN) + FE_TXLEN_SIZE) { |
732 | /* No room. */ |
733 | goto indicate_active; |
734 | } |
735 | |
736 | #if FE_SINGLE_TRANSMISSION |
737 | if (sc->txb_count > 0) { |
738 | /* Just one packet per a transmission buffer. */ |
739 | goto indicate_active; |
740 | } |
741 | #endif |
742 | |
743 | /* |
744 | * Get the next mbuf chain for a packet to send. |
745 | */ |
746 | IFQ_DEQUEUE(&ifp->if_snd, m); |
747 | if (m == 0) { |
748 | /* No more packets to send. */ |
749 | goto indicate_inactive; |
750 | } |
751 | |
752 | /* Tap off here if there is a BPF listener. */ |
753 | bpf_mtap(ifp, m); |
754 | |
755 | /* |
756 | * Copy the mbuf chain into the transmission buffer. |
757 | * txb_* variables are updated as necessary. |
758 | */ |
759 | mb86960_write_mbufs(sc, m); |
760 | |
761 | m_freem(m); |
762 | |
763 | /* Start transmitter if it's idle. */ |
764 | if (sc->txb_sched == 0) |
765 | mb86960_xmit(sc); |
766 | } |
767 | |
768 | indicate_inactive: |
769 | /* |
770 | * We are using the !OACTIVE flag to indicate to |
771 | * the outside world that we can accept an |
772 | * additional packet rather than that the |
773 | * transmitter is _actually_ active. Indeed, the |
774 | * transmitter may be active, but if we haven't |
775 | * filled all the buffers with data then we still |
776 | * want to accept more. |
777 | */ |
778 | ifp->if_flags &= ~IFF_OACTIVE; |
779 | return; |
780 | |
781 | indicate_active: |
782 | /* |
783 | * The transmitter is active, and there are no room for |
784 | * more outgoing packets in the transmission buffer. |
785 | */ |
786 | ifp->if_flags |= IFF_OACTIVE; |
787 | return; |
788 | } |
789 | |
790 | /* |
791 | * Transmission interrupt handler |
792 | * The control flow of this function looks silly. FIXME. |
793 | */ |
794 | void |
795 | mb86960_tint(struct mb86960_softc *sc, uint8_t tstat) |
796 | { |
797 | bus_space_tag_t bst = sc->sc_bst; |
798 | bus_space_handle_t bsh = sc->sc_bsh; |
799 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
800 | int left; |
801 | int col; |
802 | |
803 | /* |
804 | * Handle "excessive collision" interrupt. |
805 | */ |
806 | if (tstat & FE_D0_COLL16) { |
807 | /* |
808 | * Find how many packets (including this collided one) |
809 | * are left unsent in transmission buffer. |
810 | */ |
811 | left = bus_space_read_1(bst, bsh, FE_BMPR10); |
812 | |
813 | #if FE_DEBUG >= 2 |
814 | log(LOG_WARNING, "%s: excessive collision (%d/%d)\n" , |
815 | device_xname(sc->sc_dev), left, sc->txb_sched); |
816 | #endif |
817 | #if FE_DEBUG >= 3 |
818 | mb86960_dump(LOG_INFO, sc); |
819 | #endif |
820 | |
821 | /* |
822 | * Update statistics. |
823 | */ |
824 | ifp->if_collisions += 16; |
825 | ifp->if_oerrors++; |
826 | ifp->if_opackets += sc->txb_sched - left; |
827 | |
828 | /* |
829 | * Collision statistics has been updated. |
830 | * Clear the collision flag on 86960 now to avoid confusion. |
831 | */ |
832 | bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); |
833 | |
834 | /* |
835 | * Restart transmitter, skipping the |
836 | * collided packet. |
837 | * |
838 | * We *must* skip the packet to keep network running |
839 | * properly. Excessive collision error is an |
840 | * indication of the network overload. If we |
841 | * tried sending the same packet after excessive |
842 | * collision, the network would be filled with |
843 | * out-of-time packets. Packets belonging |
844 | * to reliable transport (such as TCP) are resent |
845 | * by some upper layer. |
846 | */ |
847 | bus_space_write_1(bst, bsh, FE_BMPR11, |
848 | FE_B11_CTRL_SKIP | FE_B11_MODE1); |
849 | sc->txb_sched = left - 1; |
850 | } |
851 | |
852 | /* |
853 | * Handle "transmission complete" interrupt. |
854 | */ |
855 | if (tstat & FE_D0_TXDONE) { |
856 | /* |
857 | * Add in total number of collisions on last |
858 | * transmission. We also clear "collision occurred" flag |
859 | * here. |
860 | * |
861 | * 86960 has a design flow on collision count on multiple |
862 | * packet transmission. When we send two or more packets |
863 | * with one start command (that's what we do when the |
864 | * transmission queue is clauded), 86960 informs us number |
865 | * of collisions occurred on the last packet on the |
866 | * transmission only. Number of collisions on previous |
867 | * packets are lost. I have told that the fact is clearly |
868 | * stated in the Fujitsu document. |
869 | * |
870 | * I considered not to mind it seriously. Collision |
871 | * count is not so important, anyway. Any comments? FIXME. |
872 | */ |
873 | |
874 | if (bus_space_read_1(bst, bsh, FE_DLCR0) & FE_D0_COLLID) { |
875 | /* Clear collision flag. */ |
876 | bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); |
877 | |
878 | /* Extract collision count from 86960. */ |
879 | col = bus_space_read_1(bst, bsh, FE_DLCR4) & FE_D4_COL; |
880 | if (col == 0) { |
881 | /* |
882 | * Status register indicates collisions, |
883 | * while the collision count is zero. |
884 | * This can happen after multiple packet |
885 | * transmission, indicating that one or more |
886 | * previous packet(s) had been collided. |
887 | * |
888 | * Since the accurate number of collisions |
889 | * has been lost, we just guess it as 1; |
890 | * Am I too optimistic? FIXME. |
891 | */ |
892 | col = 1; |
893 | } else |
894 | col >>= FE_D4_COL_SHIFT; |
895 | ifp->if_collisions += col; |
896 | #if FE_DEBUG >= 4 |
897 | log(LOG_WARNING, "%s: %d collision%s (%d)\n" , |
898 | device_xname(sc->sc_dev), col, col == 1 ? "" : "s" , |
899 | sc->txb_sched); |
900 | #endif |
901 | } |
902 | |
903 | /* |
904 | * Update total number of successfully |
905 | * transmitted packets. |
906 | */ |
907 | ifp->if_opackets += sc->txb_sched; |
908 | sc->txb_sched = 0; |
909 | } |
910 | |
911 | if (sc->txb_sched == 0) { |
912 | /* |
913 | * The transmitter is no more active. |
914 | * Reset output active flag and watchdog timer. |
915 | */ |
916 | ifp->if_flags &= ~IFF_OACTIVE; |
917 | ifp->if_timer = 0; |
918 | |
919 | /* |
920 | * If more data is ready to transmit in the buffer, start |
921 | * transmitting them. Otherwise keep transmitter idle, |
922 | * even if more data is queued. This gives receive |
923 | * process a slight priority. |
924 | */ |
925 | if (sc->txb_count > 0) |
926 | mb86960_xmit(sc); |
927 | } |
928 | } |
929 | |
930 | /* |
931 | * Ethernet interface receiver interrupt. |
932 | */ |
933 | void |
934 | mb86960_rint(struct mb86960_softc *sc, uint8_t rstat) |
935 | { |
936 | bus_space_tag_t bst = sc->sc_bst; |
937 | bus_space_handle_t bsh = sc->sc_bsh; |
938 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
939 | u_int status, len; |
940 | int i; |
941 | |
942 | /* |
943 | * Update statistics if this interrupt is caused by an error. |
944 | */ |
945 | if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | |
946 | FE_D1_SRTPKT)) { |
947 | #if FE_DEBUG >= 3 |
948 | char sbuf[sizeof(FE_D1_ERRBITS) + 64]; |
949 | |
950 | snprintb(sbuf, sizeof(sbuf), FE_D1_ERRBITS, rstat); |
951 | log(LOG_WARNING, "%s: receive error: %s\n" , |
952 | device_xname(sc->sc_dev), sbuf); |
953 | #endif |
954 | ifp->if_ierrors++; |
955 | } |
956 | |
957 | /* |
958 | * MB86960 has a flag indicating "receive queue empty." |
959 | * We just loop checking the flag to pull out all received |
960 | * packets. |
961 | * |
962 | * We limit the number of iterrations to avoid infinite loop. |
963 | * It can be caused by a very slow CPU (some broken |
964 | * peripheral may insert incredible number of wait cycles) |
965 | * or, worse, by a broken MB86960 chip. |
966 | */ |
967 | for (i = 0; i < FE_MAX_RECV_COUNT; i++) { |
968 | /* Stop the iterration if 86960 indicates no packets. */ |
969 | if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) |
970 | break; |
971 | |
972 | /* |
973 | * Extract receive packet status from the receive |
974 | * packet header. |
975 | */ |
976 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
977 | status = bus_space_read_1(bst, bsh, FE_BMPR8); |
978 | (void)bus_space_read_1(bst, bsh, FE_BMPR8); |
979 | } else |
980 | status = bus_space_read_2(bst, bsh, FE_BMPR8); |
981 | |
982 | #if FE_DEBUG >= 4 |
983 | log(LOG_INFO, "%s: receive status = %02x\n" , |
984 | device_xname(sc->sc_dev), status); |
985 | #endif |
986 | |
987 | /* |
988 | * If there was an error, update statistics and drop |
989 | * the packet, unless the interface is in promiscuous |
990 | * mode. |
991 | */ |
992 | if ((status & FE_RXSTAT_GOODPKT) == 0) { |
993 | if ((ifp->if_flags & IFF_PROMISC) == 0) { |
994 | ifp->if_ierrors++; |
995 | mb86960_droppacket(sc); |
996 | continue; |
997 | } |
998 | } |
999 | |
1000 | /* |
1001 | * Extract the packet length from the receive packet header. |
1002 | * It is a sum of a header (14 bytes) and a payload. |
1003 | * CRC has been stripped off by the 86960. |
1004 | */ |
1005 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
1006 | len = bus_space_read_1(bst, bsh, FE_BMPR8); |
1007 | len |= bus_space_read_1(bst, bsh, FE_BMPR8) << 8; |
1008 | } else |
1009 | len = bus_space_read_2(bst, bsh, FE_BMPR8); |
1010 | |
1011 | /* |
1012 | * MB86965 checks the packet length and drop big packet |
1013 | * before passing it to us. There are no chance we can |
1014 | * get [crufty] packets. Hence, if the length exceeds |
1015 | * the specified limit, it means some serious failure, |
1016 | * such as out-of-sync on receive buffer management. |
1017 | * |
1018 | * Is this statement true? FIXME. |
1019 | */ |
1020 | if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN) || |
1021 | len < ETHER_HDR_LEN) { |
1022 | #if FE_DEBUG >= 2 |
1023 | log(LOG_WARNING, |
1024 | "%s: received a %s packet? (%u bytes)\n" , |
1025 | device_xname(sc->sc_dev), |
1026 | len < ETHER_HDR_LEN ? "partial" : "big" , len); |
1027 | #endif |
1028 | ifp->if_ierrors++; |
1029 | mb86960_droppacket(sc); |
1030 | continue; |
1031 | } |
1032 | |
1033 | /* |
1034 | * Check for a short (RUNT) packet. We *do* check |
1035 | * but do nothing other than print a message. |
1036 | * Short packets are illegal, but does nothing bad |
1037 | * if it carries data for upper layer. |
1038 | */ |
1039 | #if FE_DEBUG >= 2 |
1040 | if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { |
1041 | log(LOG_WARNING, |
1042 | "%s: received a short packet? (%u bytes)\n" , |
1043 | device_xname(sc->sc_dev), len); |
1044 | } |
1045 | #endif |
1046 | |
1047 | /* |
1048 | * Go get a packet. |
1049 | */ |
1050 | if (mb86960_get_packet(sc, len) == 0) { |
1051 | /* Skip a packet, updating statistics. */ |
1052 | #if FE_DEBUG >= 2 |
1053 | log(LOG_WARNING, |
1054 | "%s: out of mbufs; dropping packet (%u bytes)\n" , |
1055 | device_xname(sc->sc_dev), len); |
1056 | #endif |
1057 | ifp->if_ierrors++; |
1058 | mb86960_droppacket(sc); |
1059 | |
1060 | /* |
1061 | * We stop receiving packets, even if there are |
1062 | * more in the buffer. We hope we can get more |
1063 | * mbufs next time. |
1064 | */ |
1065 | return; |
1066 | } |
1067 | |
1068 | /* Successfully received a packet. Update stat. */ |
1069 | ifp->if_ipackets++; |
1070 | } |
1071 | } |
1072 | |
1073 | /* |
1074 | * Ethernet interface interrupt processor |
1075 | */ |
1076 | int |
1077 | mb86960_intr(void *arg) |
1078 | { |
1079 | struct mb86960_softc *sc = arg; |
1080 | bus_space_tag_t bst = sc->sc_bst; |
1081 | bus_space_handle_t bsh = sc->sc_bsh; |
1082 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
1083 | uint8_t tstat, rstat; |
1084 | |
1085 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0 || |
1086 | !device_is_active(sc->sc_dev)) |
1087 | return 0; |
1088 | |
1089 | #if FE_DEBUG >= 4 |
1090 | log(LOG_INFO, "%s: mb86960_intr()\n" , device_xname(sc->sc_dev)); |
1091 | mb86960_dump(LOG_INFO, sc); |
1092 | #endif |
1093 | |
1094 | /* |
1095 | * Get interrupt conditions, masking unneeded flags. |
1096 | */ |
1097 | tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; |
1098 | rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; |
1099 | if (tstat == 0 && rstat == 0) |
1100 | return 0; |
1101 | |
1102 | /* |
1103 | * Loop until there are no more new interrupt conditions. |
1104 | */ |
1105 | for (;;) { |
1106 | /* |
1107 | * Reset the conditions we are acknowledging. |
1108 | */ |
1109 | bus_space_write_1(bst, bsh, FE_DLCR0, tstat); |
1110 | bus_space_write_1(bst, bsh, FE_DLCR1, rstat); |
1111 | |
1112 | /* |
1113 | * Handle transmitter interrupts. Handle these first because |
1114 | * the receiver will reset the board under some conditions. |
1115 | */ |
1116 | if (tstat != 0) |
1117 | mb86960_tint(sc, tstat); |
1118 | |
1119 | /* |
1120 | * Handle receiver interrupts. |
1121 | */ |
1122 | if (rstat != 0) |
1123 | mb86960_rint(sc, rstat); |
1124 | |
1125 | /* |
1126 | * Update the multicast address filter if it is |
1127 | * needed and possible. We do it now, because |
1128 | * we can make sure the transmission buffer is empty, |
1129 | * and there is a good chance that the receive queue |
1130 | * is empty. It will minimize the possibility of |
1131 | * packet lossage. |
1132 | */ |
1133 | if (sc->filter_change && |
1134 | sc->txb_count == 0 && sc->txb_sched == 0) { |
1135 | mb86960_loadmar(sc); |
1136 | ifp->if_flags &= ~IFF_OACTIVE; |
1137 | } |
1138 | |
1139 | /* |
1140 | * If it looks like the transmitter can take more data, |
1141 | * attempt to start output on the interface. This is done |
1142 | * after handling the receiver interrupt to give the |
1143 | * receive operation priority. |
1144 | */ |
1145 | if ((ifp->if_flags & IFF_OACTIVE) == 0) |
1146 | mb86960_start(ifp); |
1147 | |
1148 | if (rstat != 0 || tstat != 0) |
1149 | rnd_add_uint32(&sc->rnd_source, rstat + tstat); |
1150 | |
1151 | /* |
1152 | * Get interrupt conditions, masking unneeded flags. |
1153 | */ |
1154 | tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; |
1155 | rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; |
1156 | if (tstat == 0 && rstat == 0) |
1157 | return 1; |
1158 | } |
1159 | } |
1160 | |
1161 | /* |
1162 | * Process an ioctl request. This code needs some work - it looks pretty ugly. |
1163 | */ |
1164 | int |
1165 | mb86960_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
1166 | { |
1167 | struct mb86960_softc *sc = ifp->if_softc; |
1168 | struct ifaddr *ifa = (struct ifaddr *)data; |
1169 | struct ifreq *ifr = (struct ifreq *)data; |
1170 | int s, error = 0; |
1171 | |
1172 | #if FE_DEBUG >= 3 |
1173 | log(LOG_INFO, "%s: ioctl(%lx)\n" , device_xname(sc->sc_dev), cmd); |
1174 | #endif |
1175 | |
1176 | s = splnet(); |
1177 | |
1178 | switch (cmd) { |
1179 | case SIOCINITIFADDR: |
1180 | if ((error = mb86960_enable(sc)) != 0) |
1181 | break; |
1182 | ifp->if_flags |= IFF_UP; |
1183 | |
1184 | mb86960_init(sc); |
1185 | switch (ifa->ifa_addr->sa_family) { |
1186 | #ifdef INET |
1187 | case AF_INET: |
1188 | arp_ifinit(ifp, ifa); |
1189 | break; |
1190 | #endif |
1191 | default: |
1192 | break; |
1193 | } |
1194 | break; |
1195 | |
1196 | case SIOCSIFFLAGS: |
1197 | if ((error = ifioctl_common(ifp, cmd, data)) != 0) |
1198 | break; |
1199 | /* XXX re-use ether_ioctl() */ |
1200 | switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { |
1201 | case IFF_RUNNING: |
1202 | /* |
1203 | * If interface is marked down and it is running, then |
1204 | * stop it. |
1205 | */ |
1206 | mb86960_stop(sc); |
1207 | ifp->if_flags &= ~IFF_RUNNING; |
1208 | mb86960_disable(sc); |
1209 | break; |
1210 | case IFF_UP: |
1211 | /* |
1212 | * If interface is marked up and it is stopped, then |
1213 | * start it. |
1214 | */ |
1215 | if ((error = mb86960_enable(sc)) != 0) |
1216 | break; |
1217 | mb86960_init(sc); |
1218 | break; |
1219 | case IFF_UP|IFF_RUNNING: |
1220 | /* |
1221 | * Reset the interface to pick up changes in any other |
1222 | * flags that affect hardware registers. |
1223 | */ |
1224 | mb86960_setmode(sc); |
1225 | break; |
1226 | case 0: |
1227 | break; |
1228 | } |
1229 | #if FE_DEBUG >= 1 |
1230 | /* "ifconfig fe0 debug" to print register dump. */ |
1231 | if (ifp->if_flags & IFF_DEBUG) { |
1232 | log(LOG_INFO, "%s: SIOCSIFFLAGS(DEBUG)\n" , |
1233 | device_xname(sc->sc_dev)); |
1234 | mb86960_dump(LOG_DEBUG, sc); |
1235 | } |
1236 | #endif |
1237 | break; |
1238 | |
1239 | case SIOCADDMULTI: |
1240 | case SIOCDELMULTI: |
1241 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0) { |
1242 | error = EIO; |
1243 | break; |
1244 | } |
1245 | |
1246 | /* Update our multicast list. */ |
1247 | if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { |
1248 | /* |
1249 | * Multicast list has changed; set the hardware filter |
1250 | * accordingly. |
1251 | */ |
1252 | if (ifp->if_flags & IFF_RUNNING) |
1253 | mb86960_setmode(sc); |
1254 | error = 0; |
1255 | } |
1256 | break; |
1257 | |
1258 | case SIOCGIFMEDIA: |
1259 | case SIOCSIFMEDIA: |
1260 | error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); |
1261 | break; |
1262 | |
1263 | default: |
1264 | error = ether_ioctl(ifp, cmd, data); |
1265 | break; |
1266 | } |
1267 | |
1268 | splx(s); |
1269 | return error; |
1270 | } |
1271 | |
1272 | /* |
1273 | * Retrieve packet from receive buffer and send to the next level up via |
1274 | * ether_input(). If there is a BPF listener, give a copy to BPF, too. |
1275 | * Returns 0 if success, -1 if error (i.e., mbuf allocation failure). |
1276 | */ |
1277 | int |
1278 | mb86960_get_packet(struct mb86960_softc *sc, u_int len) |
1279 | { |
1280 | bus_space_tag_t bst = sc->sc_bst; |
1281 | bus_space_handle_t bsh = sc->sc_bsh; |
1282 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
1283 | struct mbuf *m; |
1284 | |
1285 | /* Allocate a header mbuf. */ |
1286 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
1287 | if (m == 0) |
1288 | return 0; |
1289 | m_set_rcvif(m, ifp); |
1290 | m->m_pkthdr.len = len; |
1291 | |
1292 | /* The following silliness is to make NFS happy. */ |
1293 | #define EROUND ((sizeof(struct ether_header) + 3) & ~3) |
1294 | #define EOFF (EROUND - sizeof(struct ether_header)) |
1295 | |
1296 | /* |
1297 | * Our strategy has one more problem. There is a policy on |
1298 | * mbuf cluster allocation. It says that we must have at |
1299 | * least MINCLSIZE (208 bytes) to allocate a cluster. For a |
1300 | * packet of a size between (MHLEN - 2) to (MINCLSIZE - 2), |
1301 | * our code violates the rule... |
1302 | * On the other hand, the current code is short, simple, |
1303 | * and fast, however. It does no harmful thing, just waists |
1304 | * some memory. Any comments? FIXME. |
1305 | */ |
1306 | |
1307 | /* Attach a cluster if this packet doesn't fit in a normal mbuf. */ |
1308 | if (len > MHLEN - EOFF) { |
1309 | MCLGET(m, M_DONTWAIT); |
1310 | if ((m->m_flags & M_EXT) == 0) { |
1311 | m_freem(m); |
1312 | return 0; |
1313 | } |
1314 | } |
1315 | |
1316 | /* |
1317 | * The following assumes there is room for the ether header in the |
1318 | * header mbuf. |
1319 | */ |
1320 | m->m_data += EOFF; |
1321 | |
1322 | /* Set the length of this packet. */ |
1323 | m->m_len = len; |
1324 | |
1325 | /* Get a packet. */ |
1326 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) |
1327 | bus_space_read_multi_1(bst, bsh, FE_BMPR8, |
1328 | mtod(m, uint8_t *), len); |
1329 | else |
1330 | bus_space_read_multi_stream_2(bst, bsh, FE_BMPR8, |
1331 | mtod(m, uint16_t *), (len + 1) >> 1); |
1332 | |
1333 | /* |
1334 | * Check if there's a BPF listener on this interface. If so, hand off |
1335 | * the raw packet to bpf. |
1336 | */ |
1337 | bpf_mtap(ifp, m); |
1338 | |
1339 | if_percpuq_enqueue(ifp->if_percpuq, m); |
1340 | return 1; |
1341 | } |
1342 | |
1343 | /* |
1344 | * Write an mbuf chain to the transmission buffer memory using 16 bit PIO. |
1345 | * Returns number of bytes actually written, including length word. |
1346 | * |
1347 | * If an mbuf chain is too long for an Ethernet frame, it is not sent. |
1348 | * Packets shorter than Ethernet minimum are legal, and we pad them |
1349 | * before sending out. An exception is "partial" packets which are |
1350 | * shorter than mandatory Ethernet header. |
1351 | * |
1352 | * I wrote a code for an experimental "delayed padding" technique. |
1353 | * When employed, it postpones the padding process for short packets. |
1354 | * If xmit() occurred at the moment, the padding process is omitted, and |
1355 | * garbages are sent as pad data. If next packet is stored in the |
1356 | * transmission buffer before xmit(), write_mbuf() pads the previous |
1357 | * packet before transmitting new packet. This *may* gain the |
1358 | * system performance (slightly). |
1359 | */ |
1360 | void |
1361 | mb86960_write_mbufs(struct mb86960_softc *sc, struct mbuf *m) |
1362 | { |
1363 | bus_space_tag_t bst = sc->sc_bst; |
1364 | bus_space_handle_t bsh = sc->sc_bsh; |
1365 | int totlen, len; |
1366 | #if FE_DEBUG >= 2 |
1367 | struct mbuf *mp; |
1368 | #endif |
1369 | |
1370 | #if FE_DELAYED_PADDING |
1371 | /* Do the "delayed padding." */ |
1372 | if (sc->txb_padding > 0) { |
1373 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
1374 | for (len = sc->txb_padding; len > 0; len--) |
1375 | bus_space_write_1(bst, bsh, FE_BMPR8, 0); |
1376 | } else { |
1377 | for (len = sc->txb_padding >> 1; len > 0; len--) |
1378 | bus_space_write_2(bst, bsh, FE_BMPR8, 0); |
1379 | } |
1380 | sc->txb_padding = 0; |
1381 | } |
1382 | #endif |
1383 | |
1384 | /* We need to use m->m_pkthdr.len, so require the header */ |
1385 | if ((m->m_flags & M_PKTHDR) == 0) |
1386 | panic("mb86960_write_mbufs: no header mbuf" ); |
1387 | |
1388 | #if FE_DEBUG >= 2 |
1389 | /* First, count up the total number of bytes to copy. */ |
1390 | for (totlen = 0, mp = m; mp != 0; mp = mp->m_next) |
1391 | totlen += mp->m_len; |
1392 | /* Check if this matches the one in the packet header. */ |
1393 | if (totlen != m->m_pkthdr.len) |
1394 | log(LOG_WARNING, "%s: packet length mismatch? (%d/%d)\n" , |
1395 | device_xname(sc->sc_dev), totlen, m->m_pkthdr.len); |
1396 | #else |
1397 | /* Just use the length value in the packet header. */ |
1398 | totlen = m->m_pkthdr.len; |
1399 | #endif |
1400 | |
1401 | #if FE_DEBUG >= 1 |
1402 | /* |
1403 | * Should never send big packets. If such a packet is passed, |
1404 | * it should be a bug of upper layer. We just ignore it. |
1405 | * ... Partial (too short) packets, neither. |
1406 | */ |
1407 | if (totlen > (ETHER_MAX_LEN - ETHER_CRC_LEN) || |
1408 | totlen < ETHER_HDR_LEN) { |
1409 | log(LOG_ERR, "%s: got a %s packet (%u bytes) to send\n" , |
1410 | device_xname(sc->sc_dev), |
1411 | totlen < ETHER_HDR_LEN ? "partial" : "big" , totlen); |
1412 | sc->sc_ec.ec_if.if_oerrors++; |
1413 | return; |
1414 | } |
1415 | #endif |
1416 | |
1417 | /* |
1418 | * Put the length word for this frame. |
1419 | * Does 86960 accept odd length? -- Yes. |
1420 | * Do we need to pad the length to minimum size by ourselves? |
1421 | * -- Generally yes. But for (or will be) the last |
1422 | * packet in the transmission buffer, we can skip the |
1423 | * padding process. It may gain performance slightly. FIXME. |
1424 | */ |
1425 | len = max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); |
1426 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
1427 | bus_space_write_1(bst, bsh, FE_BMPR8, len); |
1428 | bus_space_write_1(bst, bsh, FE_BMPR8, len >> 8); |
1429 | } else { |
1430 | bus_space_write_2(bst, bsh, FE_BMPR8, len); |
1431 | /* roundup packet length since we will use word access */ |
1432 | totlen = (totlen + 1) & ~1; |
1433 | } |
1434 | |
1435 | /* |
1436 | * Update buffer status now. |
1437 | * Truncate the length up to an even number |
1438 | * if the chip is set in SBW_WORD mode. |
1439 | */ |
1440 | sc->txb_free -= FE_TXLEN_SIZE + |
1441 | max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); |
1442 | sc->txb_count++; |
1443 | |
1444 | #if FE_DELAYED_PADDING |
1445 | /* Postpone the packet padding if necessary. */ |
1446 | if (totlen < (ETHER_MIN_LEN - ETHER_CRC_LEN)) |
1447 | sc->txb_padding = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; |
1448 | #endif |
1449 | |
1450 | /* |
1451 | * Transfer the data from mbuf chain to the transmission buffer. |
1452 | * If the MB86960 is configured in word mode, data needs to be |
1453 | * transferred as words, and only words. |
1454 | * So that we require some extra code to patch over odd-length |
1455 | * or unaligned mbufs. |
1456 | */ |
1457 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
1458 | /* It's simple in byte mode. */ |
1459 | for (; m != NULL; m = m->m_next) { |
1460 | if (m->m_len) { |
1461 | bus_space_write_multi_1(bst, bsh, FE_BMPR8, |
1462 | mtod(m, uint8_t *), m->m_len); |
1463 | } |
1464 | } |
1465 | } else { |
1466 | /* a bit trickier in word mode. */ |
1467 | uint8_t *data, savebyte[2]; |
1468 | int leftover; |
1469 | |
1470 | leftover = 0; |
1471 | savebyte[0] = savebyte[1] = 0; |
1472 | |
1473 | for (; m != NULL; m = m->m_next) { |
1474 | len = m->m_len; |
1475 | if (len == 0) |
1476 | continue; |
1477 | data = mtod(m, uint8_t *); |
1478 | while (len > 0) { |
1479 | if (leftover) { |
1480 | /* |
1481 | * Data left over (from mbuf or |
1482 | * realignment). Buffer the next |
1483 | * byte, and write it and the |
1484 | * leftover data out. |
1485 | */ |
1486 | savebyte[1] = *data++; |
1487 | len--; |
1488 | bus_space_write_stream_2(bst, bsh, |
1489 | FE_BMPR8, *(uint16_t *)savebyte); |
1490 | leftover = 0; |
1491 | } else if (BUS_SPACE_ALIGNED_POINTER(data, |
1492 | uint16_t) == 0) { |
1493 | /* |
1494 | * Unaligned data; buffer the next byte. |
1495 | */ |
1496 | savebyte[0] = *data++; |
1497 | len--; |
1498 | leftover = 1; |
1499 | } else { |
1500 | /* |
1501 | * Aligned data; output contiguous |
1502 | * words as much as we can, then |
1503 | * buffer the remaining byte, if any. |
1504 | */ |
1505 | leftover = len & 1; |
1506 | len &= ~1; |
1507 | bus_space_write_multi_stream_2(bst, bsh, |
1508 | FE_BMPR8, (uint16_t *)data, |
1509 | len >> 1); |
1510 | data += len; |
1511 | if (leftover) |
1512 | savebyte[0] = *data++; |
1513 | len = 0; |
1514 | } |
1515 | } |
1516 | if (len < 0) |
1517 | panic("mb86960_write_mbufs: negative len" ); |
1518 | } |
1519 | if (leftover) { |
1520 | savebyte[1] = 0; |
1521 | bus_space_write_stream_2(bst, bsh, FE_BMPR8, |
1522 | *(uint16_t *)savebyte); |
1523 | } |
1524 | } |
1525 | #if FE_DELAYED_PADDING == 0 |
1526 | /* |
1527 | * Pad the packet to the minimum length if necessary. |
1528 | */ |
1529 | len = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; |
1530 | if (len > 0) { |
1531 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
1532 | while (len-- > 0) |
1533 | bus_space_write_1(bst, bsh, FE_BMPR8, 0); |
1534 | } else { |
1535 | len >>= 1; |
1536 | while (len-- > 0) |
1537 | bus_space_write_2(bst, bsh, FE_BMPR8, 0); |
1538 | } |
1539 | } |
1540 | #endif |
1541 | } |
1542 | |
1543 | /* |
1544 | * Compute the multicast address filter from the |
1545 | * list of multicast addresses we need to listen to. |
1546 | */ |
1547 | void |
1548 | mb86960_getmcaf(struct ethercom *ec, uint8_t *af) |
1549 | { |
1550 | struct ifnet *ifp = &ec->ec_if; |
1551 | struct ether_multi *enm; |
1552 | uint32_t crc; |
1553 | struct ether_multistep step; |
1554 | |
1555 | /* |
1556 | * Set up multicast address filter by passing all multicast addresses |
1557 | * through a crc generator, and then using the high order 6 bits as an |
1558 | * index into the 64 bit logical address filter. The high order bit |
1559 | * selects the word, while the rest of the bits select the bit within |
1560 | * the word. |
1561 | */ |
1562 | |
1563 | if ((ifp->if_flags & IFF_PROMISC) != 0) |
1564 | goto allmulti; |
1565 | |
1566 | memset(af, 0, FE_FILTER_LEN); |
1567 | ETHER_FIRST_MULTI(step, ec, enm); |
1568 | while (enm != NULL) { |
1569 | if (memcmp(enm->enm_addrlo, enm->enm_addrhi, |
1570 | sizeof(enm->enm_addrlo)) != 0) { |
1571 | /* |
1572 | * We must listen to a range of multicast addresses. |
1573 | * For now, just accept all multicasts, rather than |
1574 | * trying to set only those filter bits needed to match |
1575 | * the range. (At this time, the only use of address |
1576 | * ranges is for IP multicast routing, for which the |
1577 | * range is big enough to require all bits set.) |
1578 | */ |
1579 | goto allmulti; |
1580 | } |
1581 | |
1582 | crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); |
1583 | |
1584 | /* Just want the 6 most significant bits. */ |
1585 | crc >>= 26; |
1586 | |
1587 | /* Turn on the corresponding bit in the filter. */ |
1588 | af[crc >> 3] |= 1 << (crc & 7); |
1589 | |
1590 | ETHER_NEXT_MULTI(step, enm); |
1591 | } |
1592 | ifp->if_flags &= ~IFF_ALLMULTI; |
1593 | return; |
1594 | |
1595 | allmulti: |
1596 | ifp->if_flags |= IFF_ALLMULTI; |
1597 | memset(af, 0xff, FE_FILTER_LEN); |
1598 | } |
1599 | |
1600 | /* |
1601 | * Calculate a new "multicast packet filter" and put the 86960 |
1602 | * receiver in appropriate mode. |
1603 | */ |
1604 | void |
1605 | mb86960_setmode(struct mb86960_softc *sc) |
1606 | { |
1607 | bus_space_tag_t bst = sc->sc_bst; |
1608 | bus_space_handle_t bsh = sc->sc_bsh; |
1609 | int flags = sc->sc_ec.ec_if.if_flags; |
1610 | |
1611 | /* |
1612 | * If the interface is not running, we postpone the update |
1613 | * process for receive modes and multicast address filter |
1614 | * until the interface is restarted. It reduces some |
1615 | * complicated job on maintaining chip states. (Earlier versions |
1616 | * of this driver had a bug on that point...) |
1617 | * |
1618 | * To complete the trick, mb86960_init() calls mb86960_setmode() after |
1619 | * restarting the interface. |
1620 | */ |
1621 | if ((flags & IFF_RUNNING) == 0) |
1622 | return; |
1623 | |
1624 | /* |
1625 | * Promiscuous mode is handled separately. |
1626 | */ |
1627 | if ((flags & IFF_PROMISC) != 0) { |
1628 | /* |
1629 | * Program 86960 to receive all packets on the segment |
1630 | * including those directed to other stations. |
1631 | * Multicast filter stored in MARs are ignored |
1632 | * under this setting, so we don't need to update it. |
1633 | * |
1634 | * Promiscuous mode is used solely by BPF, and BPF only |
1635 | * listens to valid (no error) packets. So, we ignore |
1636 | * errornous ones even in this mode. |
1637 | */ |
1638 | bus_space_write_1(bst, bsh, FE_DLCR5, |
1639 | sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1); |
1640 | sc->filter_change = 0; |
1641 | |
1642 | #if FE_DEBUG >= 3 |
1643 | log(LOG_INFO, "%s: promiscuous mode\n" , |
1644 | device_xname(sc->sc_dev)); |
1645 | #endif |
1646 | return; |
1647 | } |
1648 | |
1649 | /* |
1650 | * Turn the chip to the normal (non-promiscuous) mode. |
1651 | */ |
1652 | bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1); |
1653 | |
1654 | /* |
1655 | * Find the new multicast filter value. |
1656 | */ |
1657 | mb86960_getmcaf(&sc->sc_ec, sc->filter); |
1658 | sc->filter_change = 1; |
1659 | |
1660 | #if FE_DEBUG >= 3 |
1661 | log(LOG_INFO, |
1662 | "%s: address filter: [%02x %02x %02x %02x %02x %02x %02x %02x]\n" , |
1663 | device_xname(sc->sc_dev), |
1664 | sc->filter[0], sc->filter[1], sc->filter[2], sc->filter[3], |
1665 | sc->filter[4], sc->filter[5], sc->filter[6], sc->filter[7]); |
1666 | #endif |
1667 | |
1668 | /* |
1669 | * We have to update the multicast filter in the 86960, A.S.A.P. |
1670 | * |
1671 | * Note that the DLC (Data Linc Control unit, i.e. transmitter |
1672 | * and receiver) must be stopped when feeding the filter, and |
1673 | * DLC trashes all packets in both transmission and receive |
1674 | * buffers when stopped. |
1675 | * |
1676 | * ... Are the above sentenses correct? I have to check the |
1677 | * manual of the MB86960A. FIXME. |
1678 | * |
1679 | * To reduce the packet lossage, we delay the filter update |
1680 | * process until buffers are empty. |
1681 | */ |
1682 | if (sc->txb_sched == 0 && sc->txb_count == 0 && |
1683 | (bus_space_read_1(bst, bsh, FE_DLCR1) & FE_D1_PKTRDY) == 0) { |
1684 | /* |
1685 | * Buffers are (apparently) empty. Load |
1686 | * the new filter value into MARs now. |
1687 | */ |
1688 | mb86960_loadmar(sc); |
1689 | } else { |
1690 | /* |
1691 | * Buffers are not empty. Mark that we have to update |
1692 | * the MARs. The new filter will be loaded by mb86960_intr() |
1693 | * later. |
1694 | */ |
1695 | #if FE_DEBUG >= 4 |
1696 | log(LOG_INFO, "%s: filter change delayed\n" , |
1697 | device_xname(sc->sc_dev)); |
1698 | #endif |
1699 | } |
1700 | } |
1701 | |
1702 | /* |
1703 | * Load a new multicast address filter into MARs. |
1704 | * |
1705 | * The caller must have splnet'ed befor mb86960_loadmar. |
1706 | * This function starts the DLC upon return. So it can be called only |
1707 | * when the chip is working, i.e., from the driver's point of view, when |
1708 | * a device is RUNNING. (I mistook the point in previous versions.) |
1709 | */ |
1710 | void |
1711 | mb86960_loadmar(struct mb86960_softc *sc) |
1712 | { |
1713 | bus_space_tag_t bst = sc->sc_bst; |
1714 | bus_space_handle_t bsh = sc->sc_bsh; |
1715 | |
1716 | /* Stop the DLC (transmitter and receiver). */ |
1717 | bus_space_write_1(bst, bsh, FE_DLCR6, |
1718 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
1719 | |
1720 | /* Select register bank 1 for MARs. */ |
1721 | bus_space_write_1(bst, bsh, FE_DLCR7, |
1722 | sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); |
1723 | |
1724 | /* Copy filter value into the registers. */ |
1725 | bus_space_write_region_1(bst, bsh, FE_MAR8, sc->filter, FE_FILTER_LEN); |
1726 | |
1727 | /* Restore the bank selection for BMPRs (i.e., runtime registers). */ |
1728 | bus_space_write_1(bst, bsh, FE_DLCR7, |
1729 | sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); |
1730 | |
1731 | /* Restart the DLC. */ |
1732 | bus_space_write_1(bst, bsh, FE_DLCR6, |
1733 | sc->proto_dlcr6 | FE_D6_DLC_ENABLE); |
1734 | |
1735 | /* We have just updated the filter. */ |
1736 | sc->filter_change = 0; |
1737 | |
1738 | #if FE_DEBUG >= 3 |
1739 | log(LOG_INFO, "%s: address filter changed\n" , device_xname(sc->sc_dev)); |
1740 | #endif |
1741 | } |
1742 | |
1743 | /* |
1744 | * Enable power on the interface. |
1745 | */ |
1746 | int |
1747 | mb86960_enable(struct mb86960_softc *sc) |
1748 | { |
1749 | |
1750 | #if FE_DEBUG >= 3 |
1751 | log(LOG_INFO, "%s: mb86960_enable()\n" , device_xname(sc->sc_dev)); |
1752 | #endif |
1753 | |
1754 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0 && sc->sc_enable != NULL) { |
1755 | if ((*sc->sc_enable)(sc) != 0) { |
1756 | aprint_error_dev(sc->sc_dev, "device enable failed\n" ); |
1757 | return EIO; |
1758 | } |
1759 | } |
1760 | |
1761 | sc->sc_stat |= FE_STAT_ENABLED; |
1762 | return 0; |
1763 | } |
1764 | |
1765 | /* |
1766 | * Disable power on the interface. |
1767 | */ |
1768 | void |
1769 | mb86960_disable(struct mb86960_softc *sc) |
1770 | { |
1771 | |
1772 | #if FE_DEBUG >= 3 |
1773 | log(LOG_INFO, "%s: mb86960_disable()\n" , device_xname(sc->sc_dev)); |
1774 | #endif |
1775 | |
1776 | if ((sc->sc_stat & FE_STAT_ENABLED) != 0 && sc->sc_disable != NULL) { |
1777 | (*sc->sc_disable)(sc); |
1778 | sc->sc_stat &= ~FE_STAT_ENABLED; |
1779 | } |
1780 | } |
1781 | |
1782 | /* |
1783 | * mbe_activate: |
1784 | * |
1785 | * Handle device activation/deactivation requests. |
1786 | */ |
1787 | int |
1788 | mb86960_activate(device_t self, enum devact act) |
1789 | { |
1790 | struct mb86960_softc *sc = device_private(self); |
1791 | |
1792 | switch (act) { |
1793 | case DVACT_DEACTIVATE: |
1794 | if_deactivate(&sc->sc_ec.ec_if); |
1795 | return 0; |
1796 | default: |
1797 | return EOPNOTSUPP; |
1798 | } |
1799 | } |
1800 | |
1801 | /* |
1802 | * mb86960_detach: |
1803 | * |
1804 | * Detach a MB86960 interface. |
1805 | */ |
1806 | int |
1807 | mb86960_detach(struct mb86960_softc *sc) |
1808 | { |
1809 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
1810 | |
1811 | /* Succeed now if there's no work to do. */ |
1812 | if ((sc->sc_stat & FE_STAT_ATTACHED) == 0) |
1813 | return 0; |
1814 | |
1815 | /* Delete all media. */ |
1816 | ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); |
1817 | |
1818 | /* Unhook the entropy source. */ |
1819 | rnd_detach_source(&sc->rnd_source); |
1820 | |
1821 | ether_ifdetach(ifp); |
1822 | if_detach(ifp); |
1823 | |
1824 | mb86960_disable(sc); |
1825 | return 0; |
1826 | } |
1827 | |
1828 | /* |
1829 | * Routines to read all bytes from the config EEPROM (93C06) through MB86965A. |
1830 | */ |
1831 | void |
1832 | mb86965_read_eeprom(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *data) |
1833 | { |
1834 | int addr, op, bit; |
1835 | uint16_t val; |
1836 | |
1837 | /* Read bytes from EEPROM; two bytes per an iteration. */ |
1838 | for (addr = 0; addr < FE_EEPROM_SIZE / 2; addr++) { |
1839 | /* Reset the EEPROM interface. */ |
1840 | bus_space_write_1(iot, ioh, FE_BMPR16, 0x00); |
1841 | bus_space_write_1(iot, ioh, FE_BMPR17, 0x00); |
1842 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
1843 | |
1844 | /* Send start bit. */ |
1845 | bus_space_write_1(iot, ioh, FE_BMPR17, FE_B17_DATA); |
1846 | FE_EEPROM_DELAY(); |
1847 | bus_space_write_1(iot, ioh, |
1848 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
1849 | FE_EEPROM_DELAY(); |
1850 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
1851 | |
1852 | /* Send read command and read address. */ |
1853 | op = 0x80 | addr; /* READ instruction */ |
1854 | for (bit = 8; bit > 0; bit--) { |
1855 | bus_space_write_1(iot, ioh, FE_BMPR17, |
1856 | (op & (1 << (bit - 1))) ? FE_B17_DATA : 0); |
1857 | FE_EEPROM_DELAY(); |
1858 | bus_space_write_1(iot, ioh, |
1859 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
1860 | FE_EEPROM_DELAY(); |
1861 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
1862 | } |
1863 | bus_space_write_1(iot, ioh, FE_BMPR17, 0x00); |
1864 | |
1865 | /* Read two bytes in each address */ |
1866 | val = 0; |
1867 | for (bit = 16; bit > 0; bit--) { |
1868 | FE_EEPROM_DELAY(); |
1869 | bus_space_write_1(iot, ioh, |
1870 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
1871 | FE_EEPROM_DELAY(); |
1872 | if (bus_space_read_1(iot, ioh, FE_BMPR17) & |
1873 | FE_B17_DATA) |
1874 | val |= 1 << (bit - 1); |
1875 | bus_space_write_1(iot, ioh, |
1876 | FE_BMPR16, FE_B16_SELECT); |
1877 | } |
1878 | data[addr * 2] = val >> 8; |
1879 | data[addr * 2 + 1] = val & 0xff; |
1880 | } |
1881 | |
1882 | /* Make sure the EEPROM is turned off. */ |
1883 | bus_space_write_1(iot, ioh, FE_BMPR16, 0); |
1884 | bus_space_write_1(iot, ioh, FE_BMPR17, 0); |
1885 | |
1886 | #if FE_DEBUG >= 3 |
1887 | /* Report what we got. */ |
1888 | log(LOG_INFO, "mb86965_read_eeprom: " |
1889 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
1890 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
1891 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
1892 | " %02x%02x%02x%02x %02x%02x%02x%02x\n" , |
1893 | data[ 0], data[ 1], data[ 2], data[ 3], |
1894 | data[ 4], data[ 5], data[ 6], data[ 7], |
1895 | data[ 8], data[ 9], data[10], data[11], |
1896 | data[12], data[13], data[14], data[15], |
1897 | data[16], data[17], data[18], data[19], |
1898 | data[20], data[21], data[22], data[23], |
1899 | data[24], data[25], data[26], data[27], |
1900 | data[28], data[29], data[30], data[31]); |
1901 | #endif |
1902 | } |
1903 | |
1904 | #if FE_DEBUG >= 1 |
1905 | void |
1906 | mb86960_dump(int level, struct mb86960_softc *sc) |
1907 | { |
1908 | bus_space_tag_t bst = sc->sc_bst; |
1909 | bus_space_handle_t bsh = sc->sc_bsh; |
1910 | uint8_t save_dlcr7; |
1911 | |
1912 | save_dlcr7 = bus_space_read_1(bst, bsh, FE_DLCR7); |
1913 | |
1914 | log(level, "\tDLCR = %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
1915 | bus_space_read_1(bst, bsh, FE_DLCR0), |
1916 | bus_space_read_1(bst, bsh, FE_DLCR1), |
1917 | bus_space_read_1(bst, bsh, FE_DLCR2), |
1918 | bus_space_read_1(bst, bsh, FE_DLCR3), |
1919 | bus_space_read_1(bst, bsh, FE_DLCR4), |
1920 | bus_space_read_1(bst, bsh, FE_DLCR5), |
1921 | bus_space_read_1(bst, bsh, FE_DLCR6), |
1922 | bus_space_read_1(bst, bsh, FE_DLCR7)); |
1923 | |
1924 | bus_space_write_1(bst, bsh, FE_DLCR7, |
1925 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_DLCR); |
1926 | log(level, "\t %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
1927 | bus_space_read_1(bst, bsh, FE_DLCR8), |
1928 | bus_space_read_1(bst, bsh, FE_DLCR9), |
1929 | bus_space_read_1(bst, bsh, FE_DLCR10), |
1930 | bus_space_read_1(bst, bsh, FE_DLCR11), |
1931 | bus_space_read_1(bst, bsh, FE_DLCR12), |
1932 | bus_space_read_1(bst, bsh, FE_DLCR13), |
1933 | bus_space_read_1(bst, bsh, FE_DLCR14), |
1934 | bus_space_read_1(bst, bsh, FE_DLCR15)); |
1935 | |
1936 | bus_space_write_1(bst, bsh, FE_DLCR7, |
1937 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_MAR); |
1938 | log(level, "\tMAR = %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
1939 | bus_space_read_1(bst, bsh, FE_MAR8), |
1940 | bus_space_read_1(bst, bsh, FE_MAR9), |
1941 | bus_space_read_1(bst, bsh, FE_MAR10), |
1942 | bus_space_read_1(bst, bsh, FE_MAR11), |
1943 | bus_space_read_1(bst, bsh, FE_MAR12), |
1944 | bus_space_read_1(bst, bsh, FE_MAR13), |
1945 | bus_space_read_1(bst, bsh, FE_MAR14), |
1946 | bus_space_read_1(bst, bsh, FE_MAR15)); |
1947 | |
1948 | bus_space_write_1(bst, bsh, FE_DLCR7, |
1949 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_BMPR); |
1950 | log(level, |
1951 | "\tBMPR = xx xx %02x %02x %02x %02x %02x %02x %02x %02x xx %02x\n" , |
1952 | bus_space_read_1(bst, bsh, FE_BMPR10), |
1953 | bus_space_read_1(bst, bsh, FE_BMPR11), |
1954 | bus_space_read_1(bst, bsh, FE_BMPR12), |
1955 | bus_space_read_1(bst, bsh, FE_BMPR13), |
1956 | bus_space_read_1(bst, bsh, FE_BMPR14), |
1957 | bus_space_read_1(bst, bsh, FE_BMPR15), |
1958 | bus_space_read_1(bst, bsh, FE_BMPR16), |
1959 | bus_space_read_1(bst, bsh, FE_BMPR17), |
1960 | bus_space_read_1(bst, bsh, FE_BMPR19)); |
1961 | |
1962 | bus_space_write_1(bst, bsh, FE_DLCR7, save_dlcr7); |
1963 | } |
1964 | #endif |
1965 | |
1966 | |